WO2012137713A1 - Abrasive medium for barrel polishing - Google Patents

Abrasive medium for barrel polishing Download PDF

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Publication number
WO2012137713A1
WO2012137713A1 PCT/JP2012/058872 JP2012058872W WO2012137713A1 WO 2012137713 A1 WO2012137713 A1 WO 2012137713A1 JP 2012058872 W JP2012058872 W JP 2012058872W WO 2012137713 A1 WO2012137713 A1 WO 2012137713A1
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Prior art keywords
polishing
workpiece
barrel polishing
diameter
media
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PCT/JP2012/058872
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French (fr)
Japanese (ja)
Inventor
慎也 加島
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新東工業株式会社
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Application filed by 新東工業株式会社 filed Critical 新東工業株式会社
Priority to JP2013508855A priority Critical patent/JP6496103B2/en
Priority to CN201290000396.4U priority patent/CN203751923U/en
Publication of WO2012137713A1 publication Critical patent/WO2012137713A1/en
Priority to PH12013502028A priority patent/PH12013502028B1/en

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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00Materials not provided for elsewhere
    • C09K3/14Anti-slip materials; Abrasives
    • C09K3/1409Abrasive particles per se
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/12Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
    • B24B31/14Abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls

Definitions

  • the present invention relates to a polishing body that is charged together with a workpiece into a barrel polishing apparatus to perform barrel polishing processing such as deburring and smoothing of the workpiece.
  • barrel polishing is used to remove scales from workpieces (hereinafter referred to as “workpieces”), deburring, removing coatings, removing burrs, removing tool marks, removing processing flaws, rounding, gloss finishing, and smoothing. It has been used for processing such as finishing.
  • a workpiece and a plurality of polishing bodies (hereinafter referred to as “media”) are put into a barrel polishing tank of a barrel polishing apparatus, and the polishing tank is rotated or vibrated to bring the workpiece and media into a fluid state. Polishing is performed by collision and contact between the workpiece and the medium.
  • the medium can be appropriately selected according to the shape and material of the workpiece and the purpose of the polishing process.
  • As the material of the media ceramic, metal, resin (for example, described in Patent Documents 1 to 3), or the like is applied.
  • Barrel polishing using ceramic or metallic media can be polished with good polishing power.
  • a medium based on a resin has an advantage that it is hard to produce a hitting mark on a work because it has a lower hardness than ceramics or metal.
  • the weight is lighter than media made of ceramics or metal, the collision energy between the workpiece and the media is low, and the polishing power is low.
  • the wear resistance is low, the media wears with the polishing time, and the polishing power decreases. In particular, when the media shape changes due to wear (uneven wear) and the contact state between the workpiece and the media changes, not only the polishing power decreases, but depending on the workpiece shape, the corners of the workpiece may be The entire workpiece cannot be polished evenly.
  • the barrel polishing medium includes a resin serving as a base and abrasive grains dispersed in the resin, and the medium has a columnar shape in which one end surface forms the bottom surface of the medium.
  • Both the boundary portion between the straight body portion and the reduced diameter portion and the vertical cross section including the apex of the reduced diameter portion form a convex curve.
  • the shape of the media By making the shape of the media into a shape having a straight body portion and a reduced diameter portion, the same shape is reduced when the media wears with the lapse of the polishing time. As a result, the change in the contact state between the workpiece and the medium can be reduced, so that the same polishing state can be maintained.
  • the vertical cross section including the intersecting portion, the boundary portion, and the apex a convex curve (that is, a shape in which all corner portions are gentle curved surfaces), the workpiece is damaged when it collides with the workpiece. There is nothing.
  • a second invention is the barrel polishing medium according to the first invention, wherein the reduced diameter portion is reduced in diameter in at least two stages toward the apex.
  • the diameter-reduced portion is reduced in multiple steps toward the apex, so that the mass (work and media (including water and polishing aid (compound) in the case of wet barrel polishing) that is put into the barrel polishing tank)) flows. Therefore, polishing can be performed efficiently.
  • a third invention is the barrel polishing medium according to the first or second invention, wherein the ratio of the diameter of the bottom surface to the distance from the bottom surface to the apex is 1: 0.5 to 1: 1.5.
  • a fourth invention is the barrel polishing medium according to the first or second invention, wherein the ratio of the diameter of the bottom surface to the distance from the bottom surface to the apex is 1: 0.8 to 1: It may be 1.0 (fourth invention).
  • the length from the bottom surface to the apex from 0.5 to 1.5 times, preferably 0.8 to 1.0 times the diameter of the bottom surface, the workpiece is ground without giving a hit mark. It can be performed.
  • a fifth invention is the barrel polishing medium according to any one of the first to fourth inventions, characterized in that a diameter of the circular cross section is 1 to 40 mm. Thereby, the uneven
  • a sixth aspect of the invention is the barrel polishing medium according to any one of the first to fifth aspects, wherein the resin has a Vickers hardness of 10 to 30 HV. Thereby, it can grind
  • a seventh invention is the barrel polishing medium according to the sixth invention, wherein the abrasive grains are contained in an amount of 30 to 70% by mass with respect to the polishing medium. Thereby, the medium can obtain a sufficient polishing force.
  • An eighth invention is the barrel polishing media according to the sixth or seventh invention, wherein the mass of the media is 0.01 to 50 g and the specific gravity is 1.5 to 2.5. It is characterized by. Due to this feature, a sufficient collision energy between the workpiece and the medium can be obtained, so that the medium can obtain a sufficient polishing force.
  • the medium of the present invention can provide a medium that can be barrel-polished without giving a hitting mark to the workpiece, and has a high polishing power for a long time.
  • the media according to the present invention includes a dry barrel polishing process in which a workpiece and a medium are put into a barrel polishing tank, and polishing is performed in a fluidized state. It can be used suitably in any of wet barrel polishing processes in which a compound is added as necessary, and these are put into a fluidized state for polishing.
  • FIG. 1A is a front view
  • FIG. 1B is a view (bottom view) taken along line AA in FIG. 1A.
  • the medium 01 has a straight body portion 11 having a continuous circular cross section and a continuous diameter of the straight body portion.
  • the medium 01 is at the upper portion thereof, and the outer diameter (or side surface) of the medium 01 is continuously reduced toward the upper side.
  • Part 12 The media wears and gets smaller with the time of barrel polishing, but on average the entire media wears during wear, and if the same shape is kept smaller, the change in polishing force due to media wear is small, When so-called uneven wear occurs that the entire surface does not wear on average, the polishing force due to the change in the contact state between the workpiece and the medium greatly varies with the lapse of the polishing time.
  • Both the boundary portion 01b and the vertical cross section including the apex 01c of the reduced diameter portion 12 form a convex curve (R surface).
  • barrel polishing is performed by collision and contact between a workpiece and a medium in a barrel polishing tank. If the intersecting part 01a, the boundary part 01b, and the vertex 01c form an acute angle, when the work comes into contact with the medium, a strike mark may be formed on the surface of the work or may be damaged. In addition, when the workpiece and the medium collide, the acute angle portion becomes a base point and the medium may be damaged.
  • the diameter-reduced portion 12 is gradually reduced in diameter toward the apex as shown in FIG.
  • the reduced diameter portion 12 in FIG. 3A has a semi-elliptical vertical cross section including the apex.
  • the reduced diameter portion of FIG. 3B is abruptly inclined near the upper end after the side faces form the same inclination angle upward.
  • the inclination angle changes stepwise with the side surface upward.
  • the diameter is reduced in four stages (a to d in FIG. 2).
  • the dashed-dotted line of FIG. 2 shows the boundary of a different diameter reduction rate. Uneven wear can be further reduced by changing the reduction ratio of the reduced diameter portion 12 (that is, the inclination angle of the side surface) in at least two stages. Further, when barrel polishing is performed, the fluidity of the mass can be improved.
  • the ratio (Y / X) of the media height Y (the distance between the vertex 01c and the bottom surface 11a) to the diameter X of the bottom surface 11a is 0.5 to 1.5, more preferably 0.8 to 1.0.
  • the diameter X of the bottom surface can be appropriately selected in accordance with the dimensions of the workpiece. However, if it is selected from 1 to 40 mm, it is possible to satisfactorily polish even the corners of the workpiece having irregularities.
  • the medium 01 is composed of a resin serving as a base and abrasive grains dispersed in the resin. If the resin is too hard, hitting marks are generated on the workpiece due to the collision with the workpiece. If the resin is too soft, the resin is deformed upon collision with the workpiece and sufficient polishing force cannot be obtained. It is preferable that the hardness (Vickers hardness) of the resin is selected from a range of 10 to 30 HV in order to make it difficult for a scratch mark to be generated on the workpiece and to obtain a sufficient polishing force.
  • the resin is a thermoplastic resin (eg, nylon resin, polystyrene resin, polypropylene resin, polyamide resin, AS resin, etc.) or thermosetting resin (eg, phenol resin, unsaturated polyester resin, polyurethane resin, epoxy resin, urea). Resins, etc.) can be suitably used.
  • thermoplastic resin eg, nylon resin, polystyrene resin, polypropylene resin, polyamide resin, AS resin, etc.
  • thermosetting resin eg, phenol resin, unsaturated polyester resin, polyurethane resin, epoxy resin, urea
  • the abrasive content is selected from the range of 30 to 70% by mass with respect to the media in order to make it difficult to generate impact marks on the workpiece and to obtain a sufficient polishing force.
  • abrasive grains known materials (for example, alumina, silica, silicon carbide, iron oxide, boron oxide, zircon, chromium oxide, diamond, gold sand, and powders thereof, or moldings made from these materials) are used. It can be used suitably. Moreover, you may use the mixed powder selected 2 or more from the said material.
  • the grain size of the abrasive grains can be appropriately selected according to the type of abrasive grains, the size of the media, the properties of the workpiece, and the purpose of polishing.
  • the weight of the medium is preferably selected from the range of 0.01 to 50 g, and more preferably selected from the range of 0.02 to 40 g.
  • the specific gravity is preferably selected from the range of 1.5 to 2.5, and more preferably selected from the range of 1.8 to 2.2.
  • a centrifugal barrel polishing apparatus (EC-2 type: manufactured by Shinto Kogyo Co., Ltd.), changes in the shape of the media due to barrel polishing were examined.
  • Two types of media having the shape described in the embodiment were formed by molding a mixture in which abrasive grains were dispersed in a thermosetting resin having a Vickers hardness of 25 HV so as to be 60% by mass of the total (diameter of the bottom surface 13a).
  • Example 2 6 mm, ratio of media height Y to diameter X of bottom surface 11a (Y / X): 1.0 media (Example 1), bottom surface 11a diameter X: 6 mm, bottom surface Ratio of media height Y to diameter X of 11a (Y / X): media having a shape of 1.3 (Example 2)).
  • a medium having the following shape was formed using the mixture. The molding method was appropriately selected from known methods such as casting and extrusion molding according to the shape to be molded.
  • Comparative Example 1 A spherical medium having a diameter of 6 mm.
  • Comparative Example 2 A cubic medium having a side length of 6 mm.
  • Comparative Example 3 A square bottom having a general length of 6 mm and a rectangular parallelepiped having a length of 9 mm perpendicular to the bottom.
  • Comparative Example 4 A medium having a straight body portion and a reduced diameter portion, having a diameter X of the bottom surface 13a of 6 mm, and a ratio of the media height Y to the diameter X of the bottom surface 11a (Y / X): 0.3.
  • Comparative Example 5 A medium having a straight body portion and a reduced diameter portion, and having a diameter X of the bottom surface 13a of 6 mm and a ratio of the media height Y to the diameter X of the bottom surface 11a (Y / X): 1.7.
  • Polishing was performed for the purpose of removing a film (paint film) of a black-coated workpiece (an angle steel having a bottom surface of 10 ⁇ 10, a thickness of 2 mm, an R surface at an intersection of 1.0 mm, and a length of 10 mm).
  • the volume ratio (volume of the entire medium / volume of the entire work) is set to 5.0 so that the ratio of the medium and the work is set to 4 barrel polishing tanks each having a hexagonal cross section.
  • the barrel polishing tank was charged to 1 ⁇ 2 the volume. Thereafter, the barrel polishing tank was placed on the centrifugal barrel polishing apparatus, and the barrel polishing tank was operated for 0.5 hours at a rotation speed of 200 rpm and a revolution speed of 200 rpm.
  • the barrel polishing tank was removed from the centrifugal barrel polishing apparatus, the workpiece was taken out from the barrel polishing tank, and the same amount of work was put into the barrel polishing tank, followed by polishing similarly.
  • the polishing process was performed 70 times, and “media shape”, “work impact mark”, “work finish”, and “polishing power” in the first polishing and the 70th polishing were evaluated. .
  • Media shape Visually the same as the initial shape ⁇ (when the size may be different), ⁇ if slight change is observed, ⁇ if significantly different from the initial shape It was.
  • Blow mark of workpiece “B” when no hit mark is visually observed, and “X” when a hit mark is observed.
  • Finishing of work When the film of the corner portion of the L-shaped part of the work was removed visually, it was evaluated as ⁇ , and when the film of the corner portion was not removed, it was marked as x. Polishing power: The change in weight before and after polishing was measured.
  • the media according to the present invention is free from uneven wear of the media and a decrease in the polishing amount with the lapse of the polishing time, and can perform barrel polishing well even at the corners of the workpiece.
  • Media shape The shape of the media after 70 polishing operations was smaller in Example 1, Example 2 and Comparative Example 1 than in the initial state, but no significant change was observed in the shape.
  • Example 2 was close to a sphere, and Comparative Example 3 was close to an ellipsoid.
  • the ratio of the diameter X to the height Y (Y / X) was changed to about 0.5 and about 1.4, respectively.
  • Striking marks on the workpiece Neither of the media was able to confirm the scratching marks on the workpiece in barrel polishing with any media. Finishing of workpiece: In Examples 1 and 2, the machining of the corner portion of the workpiece was completed even in the first and 70th barrel polishing. In Comparative Example 1, processing of the corner portion of the workpiece was not completed in any barrel polishing, and in Comparative Examples 2 to 5, processing of the corner portion of the workpiece was completed in the first barrel polishing. However, it is understood that the machining of the corner portion of the workpiece is not completed in the 70th polishing, and the contact with the corner portion of the workpiece becomes insufficient due to the uneven wear of the media.
  • Polishing power In barrel polishing with media (Comparative Examples 2 to 5) whose shape changes due to polishing, the surface roughness of the workpiece after the 70th polishing is significantly larger than that after the first polishing. Thus, it can be seen that the polishing force is reduced by the change in shape due to uneven wear. Moreover, although the workpiece
  • the surface roughness of the workpiece polished by the media of Example 1 and Example 2 is significantly smaller than that before polishing, and the surface roughness of the workpiece after the first polishing and after the 70th polishing. From this, it can be seen that good polishing power is maintained for a long time.
  • the media of Example 1 is more preferable than the media with Example 2 because the difference between the first polishing and the 70th polishing is smaller.
  • the barrel polishing media of the present invention can be suitably used for both dry barrel polishing and wet barrel polishing. Moreover, it can be suitably used not only for centrifugal barrel polishing described in the embodiments but also for polishing by a known barrel polishing apparatus such as a vibration barrel polishing apparatus, a fluidized barrel polishing apparatus, and a rotary barrel polishing apparatus.
  • a known barrel polishing apparatus such as a vibration barrel polishing apparatus, a fluidized barrel polishing apparatus, and a rotary barrel polishing apparatus.

Abstract

[Problem] To provide an abrasive medium for barrel polishing which does not cause blow marks on a target object (workpiece) after making contact with the workpiece and does not vary largely in a contact state with the workpiece according to the time of a polishing process. [Solution] The abrasive medium is formed of a mixture prepared by dispersing particles in a resin base. The abrasive medium has a granular shape formed by: a cylindrical linear body part having an end surface as a bottom surface; and a diameter reduction part extending from the other end surface of the linear body part with a continuously reducing diameter, wherein an intersection between the bottom surface and a lateral surface of the linear body part, a boundary between the linear body part and the diameter reduction part, a vertical section of the diameter reduction part including the apex of the diameter reduction part are convex.

Description

バレル研磨用研磨体Polishing body for barrel polishing
本発明は、被加工物と共にバレル研磨装置に投入し、被加工物のバリ取りおよび平滑仕上げ等のバレル研磨加工を行うための研磨体に関する。 The present invention relates to a polishing body that is charged together with a workpiece into a barrel polishing apparatus to perform barrel polishing processing such as deburring and smoothing of the workpiece.
従来より、バレル研磨加工は被加工物(以降、「ワーク」と記す)のスケール除去、バリ取り、皮膜除去、カエリ取り、ツールマークの除去、加工傷の除去、R面付け、光沢仕上げ、平滑仕上げ等の加工に用いられてきた。バレル研磨は、ワークと複数の研磨体(以降、「メディア」と記す)とをバレル研磨装置のバレル研磨槽に投入し、前記研磨槽を回転、または振動させることでワークおよびメディアを流動状態にし、ワークとメディアの衝突および接触により研磨が行われる。メディアは、ワークの形状、材質、および研磨加工の目的に合わせて適宜選択することができる。メディアの材質として、セラミックス質、金属質、樹脂(例えば特許文献1~3に記載)等が適用される。 Conventionally, barrel polishing is used to remove scales from workpieces (hereinafter referred to as “workpieces”), deburring, removing coatings, removing burrs, removing tool marks, removing processing flaws, rounding, gloss finishing, and smoothing. It has been used for processing such as finishing. In barrel polishing, a workpiece and a plurality of polishing bodies (hereinafter referred to as “media”) are put into a barrel polishing tank of a barrel polishing apparatus, and the polishing tank is rotated or vibrated to bring the workpiece and media into a fluid state. Polishing is performed by collision and contact between the workpiece and the medium. The medium can be appropriately selected according to the shape and material of the workpiece and the purpose of the polishing process. As the material of the media, ceramic, metal, resin (for example, described in Patent Documents 1 to 3), or the like is applied.
特開2000-016868号公報JP 2000-016868 A 特開2007-268686号公報JP 2007-268686 A 特開平07-068463号公報Japanese Patent Laid-Open No. 07-068463
セラミックス質や金属質のメディアを用いたバレル研磨は研磨力が良好に研磨できるが、ワークの材質によってはワークとメディアの衝突による打撃痕や傷を生じる場合がある。一方、樹脂を基体としたメディアは、セラミックス質や金属質より硬度が低いため、ワークに打撃痕が生じにくいという利点がある。しかし、セラミックス質や金属質からなるメディアに比べて重量が軽いので、ワークとメディアとの衝突エネルギーが低く、研磨力が低い。また、耐摩耗性が低いため研磨時間と共にメディアが摩耗し、研磨力が減少する。特に、摩耗によってメディアの形状が変化することによって(偏摩耗)、ワークとメディアの接触状態が変化した場合は、研磨力が低下するばかりでなく、ワークの形状によってはワークの隅角部がメディアと接触できなくなり、ワーク全体をムラなく研磨することができない。 Barrel polishing using ceramic or metallic media can be polished with good polishing power. However, depending on the material of the workpiece, there are cases in which impact marks and scratches are caused by the collision between the workpiece and the media. On the other hand, a medium based on a resin has an advantage that it is hard to produce a hitting mark on a work because it has a lower hardness than ceramics or metal. However, since the weight is lighter than media made of ceramics or metal, the collision energy between the workpiece and the media is low, and the polishing power is low. Further, since the wear resistance is low, the media wears with the polishing time, and the polishing power decreases. In particular, when the media shape changes due to wear (uneven wear) and the contact state between the workpiece and the media changes, not only the polishing power decreases, but depending on the workpiece shape, the corners of the workpiece may be The entire workpiece cannot be polished evenly.
前記課題に鑑み、第1の発明のバレル研磨用メディアは、基体となる樹脂と前記樹脂に分散された砥粒とで構成され、前記メディアは一端面が該メディアの底面を形成する円柱状の直胴部と、前記直胴部の他端面から連続的に縮径して先端が該メディアの頂点を形成する縮径部とを備え、前記底面と前記直胴部の側面との交差部と、前記直胴部と前記縮径部との境界部および前記縮径部の頂点を含む垂直方向断面と、はいずれも凸曲線を形成していることを特徴とする。前記メディアの形状を、直胴部と縮径部を備えた形状とすることで、研磨時間の経過と共にメディアが摩耗する際、同形状のまま小さくなる。これによって、ワークとメディアの接触状態の変化を小さくすることができるので、同一の研磨状態を維持することができる。また、前記交差部と前記境界部及び前記頂点を含む垂直方向断面を凸曲線(すなわち、角部が全てなだらかな曲面である形状)とすることで、ワークとの衝突の際にワークが受傷することがない。 In view of the above problems, the barrel polishing medium according to the first aspect of the present invention includes a resin serving as a base and abrasive grains dispersed in the resin, and the medium has a columnar shape in which one end surface forms the bottom surface of the medium. A straight body part, and a diameter-reduced part continuously reducing the diameter from the other end surface of the straight body part so that the tip forms the apex of the medium, and an intersection of the bottom surface and the side surface of the straight body part; Both the boundary portion between the straight body portion and the reduced diameter portion and the vertical cross section including the apex of the reduced diameter portion form a convex curve. By making the shape of the media into a shape having a straight body portion and a reduced diameter portion, the same shape is reduced when the media wears with the lapse of the polishing time. As a result, the change in the contact state between the workpiece and the medium can be reduced, so that the same polishing state can be maintained. In addition, by making the vertical cross section including the intersecting portion, the boundary portion, and the apex a convex curve (that is, a shape in which all corner portions are gentle curved surfaces), the workpiece is damaged when it collides with the workpiece. There is nothing.
第2の発明は、第1の発明に記載のバレル研磨用メディアであって、前記縮径部は頂点に向かって少なくとも2段階で縮径されていることを特徴とする。前記縮径部は頂点に向かって多段階で縮径することで、マス(バレル研磨槽に投入したワークとメディア(湿式バレル研磨の場合は水および研磨助剤(コンパウンド)も含む))の流動性がよくなり、効率よく研磨を行うことができる。 A second invention is the barrel polishing medium according to the first invention, wherein the reduced diameter portion is reduced in diameter in at least two stages toward the apex. The diameter-reduced portion is reduced in multiple steps toward the apex, so that the mass (work and media (including water and polishing aid (compound) in the case of wet barrel polishing) that is put into the barrel polishing tank)) flows. Therefore, polishing can be performed efficiently.
第3の発明は、第1または第2の発明に記載のバレル研磨用メディアであって、前記底面の直径と、当該底面から前記頂点までの距離との比が1:0.5~1:1.5であることを特徴とする。 A third invention is the barrel polishing medium according to the first or second invention, wherein the ratio of the diameter of the bottom surface to the distance from the bottom surface to the apex is 1: 0.5 to 1: 1.5.
第4の発明は、第1または第2の発明に記載のバレル研磨用メディアであって、前記底面の直径と、当該底面から前記頂点までの距離との比が1:0.8~1:1.0としてもよい(第4の発明)であることを特徴とする。前記底面から前記頂点までの長さを、前記底面の直径の0.5~1.5倍、好ましくは0.8~1.0倍から選択することで、ワークに打撃痕を与えずに研磨を行うことができる。 A fourth invention is the barrel polishing medium according to the first or second invention, wherein the ratio of the diameter of the bottom surface to the distance from the bottom surface to the apex is 1: 0.8 to 1: It may be 1.0 (fourth invention). By selecting the length from the bottom surface to the apex from 0.5 to 1.5 times, preferably 0.8 to 1.0 times the diameter of the bottom surface, the workpiece is ground without giving a hit mark. It can be performed.
第5の発明は、第1ないし第4のいずれか1つの発明に記載のバレル研磨用メディアであって、前記円形断面の直径が、1~40mmであることを特徴とする。これにより、ワークの凹凸部および隅角部も良好に研磨することができる。 A fifth invention is the barrel polishing medium according to any one of the first to fourth inventions, characterized in that a diameter of the circular cross section is 1 to 40 mm. Thereby, the uneven | corrugated | grooved part and corner part of a workpiece | work can also be grind | polished favorably.
第6の発明は、第1ないし第5のいずれか1つの発明に記載のバレル研磨用メディアであって、前記樹脂のビッカース硬さが10~30HVであることを特徴とする。これにより、ワークに打撃痕を与えずに研磨を行うことができる。 A sixth aspect of the invention is the barrel polishing medium according to any one of the first to fifth aspects, wherein the resin has a Vickers hardness of 10 to 30 HV. Thereby, it can grind | polish, without giving a hit | damage trace to a workpiece | work.
第7の発明は、第6の発明に記載のバレル研磨用メディアであって、前記砥粒は、前記研磨メディアに対して30~70質量%含有されていることを特徴とする。これにより、メディアは十分な研磨力を得ることができる。 A seventh invention is the barrel polishing medium according to the sixth invention, wherein the abrasive grains are contained in an amount of 30 to 70% by mass with respect to the polishing medium. Thereby, the medium can obtain a sufficient polishing force.
第8の発明は、第6または第7の発明に記載のバレル研磨用メディアであって、前記メディアの質量が0.01~50gであり、かつ比重が1.5~2.5であることを特徴とする。この特徴によりワークとメディアとの衝突エネルギーを十分得ることができるので、メディアは十分な研磨力を得ることができる。 An eighth invention is the barrel polishing media according to the sixth or seventh invention, wherein the mass of the media is 0.01 to 50 g and the specific gravity is 1.5 to 2.5. It is characterized by. Due to this feature, a sufficient collision energy between the workpiece and the medium can be obtained, so that the medium can obtain a sufficient polishing force.
この様に、本発明のメディアは、ワークに打撃痕を与えることなく、バレル研磨を行うことができるメディアを提供することができ、また、長時間にわたり高い研磨力を有している。 As described above, the medium of the present invention can provide a medium that can be barrel-polished without giving a hitting mark to the workpiece, and has a high polishing power for a long time.
なお、本発明に係るメディアは、バレル研磨槽に被加工物とメディアとを投入し、これらを流動状態にして研磨を行う乾式バレル研磨加工と、バレル研磨槽に被加工物とメディアと水と必要に応じてコンパウンドとを投入し、これらを流動状態にして研磨を行う湿式バレル研磨加工と、のいずれにおいても好適に用いることができる。 The media according to the present invention includes a dry barrel polishing process in which a workpiece and a medium are put into a barrel polishing tank, and polishing is performed in a fluidized state. It can be used suitably in any of wet barrel polishing processes in which a compound is added as necessary, and these are put into a fluidized state for polishing.
実施形態におけるメディアの形状を示す説明図である。図1(A)は正面図、図1(B)は図1(A)におけるA-A線矢視図(底面図)である。It is explanatory drawing which shows the shape of the medium in embodiment. 1A is a front view, and FIG. 1B is a view (bottom view) taken along line AA in FIG. 1A. 実施形態におけるメディアの形状を示す説明図である。It is explanatory drawing which shows the shape of the medium in embodiment. 本発明のメディアの形状を示す説明図である。It is explanatory drawing which shows the shape of the medium of this invention.
以下に、本発明を実施するための形態について図を用いて説明する。なお、本文における上下左右方向は、特に断りのない限り図中の方向を示す。 Below, the form for implementing this invention is demonstrated using figures. Note that the vertical and horizontal directions in the text indicate the directions in the figure unless otherwise specified.
メディア01は、連続した円形断面を有する直胴部11と、前記直胴部と連続して、その上部にあり、その外形面(又は側面)が上方に向かって連続的に縮径する縮径部12と、で構成される。メディアはバレル研磨の時間経過に伴い摩耗し小さくなるが、摩耗の際に平均的にメディアの全体が摩耗し、同形状を保って小さくなる場合はメディアの摩耗による研磨力の変化は小さいが、平均的に全体が摩耗しない、いわゆる偏摩耗が生じた場合は、研磨時間の経過に伴いワークとメディアとの接触状態の変化することによる研磨力が大きく異なる。例えば、四角柱形状のメディアによりバレル研磨を行った場合は、メディアの角部に衝突エネルギーが集中し、次第に円柱形状または球形状となる。そのため、初期のメディアによる研磨力と変形後のメディアによる研磨力は大きく異なるため、変形後のメディアによってバレル研磨を行った際、ワークの研磨状態は不十分もしくはムラが生じる。メディアの形状を本実施形態のような形状とすることで、偏摩耗を防ぐことができる。 The medium 01 has a straight body portion 11 having a continuous circular cross section and a continuous diameter of the straight body portion. The medium 01 is at the upper portion thereof, and the outer diameter (or side surface) of the medium 01 is continuously reduced toward the upper side. Part 12. The media wears and gets smaller with the time of barrel polishing, but on average the entire media wears during wear, and if the same shape is kept smaller, the change in polishing force due to media wear is small, When so-called uneven wear occurs that the entire surface does not wear on average, the polishing force due to the change in the contact state between the workpiece and the medium greatly varies with the lapse of the polishing time. For example, when barrel polishing is performed with a quadrangular prism-shaped medium, the collision energy concentrates on the corner of the medium, and gradually becomes a cylindrical shape or a spherical shape. For this reason, the polishing force by the initial medium and the polishing force by the deformed medium are greatly different. Therefore, when barrel polishing is performed by the deformed medium, the polishing state of the workpiece is insufficient or uneven. Uneven wear can be prevented by making the shape of the media as in this embodiment.
また、前記直胴部11の底面(図1(A)における最下部)11aと前記底面11aに直交する側面11bとが成す交差部01aと、前記直胴部11と前記縮径部12との境界部01bと、前記縮径部12の頂点01c含む垂直方向断面と、は何れも凸曲線(R面)を形成している。バレル研磨は前述の通り、バレル研磨槽中でワークとメディアが衝突および接触することで研磨が行われる。仮に前記交差部01aと前記境界部01bと前記頂点01cとが鋭角を形成していた場合、ワークとメディアが接触する際、ワークの表面に打撃痕が形成される、または受傷する恐れがある。また、ワークとメディアが衝突する際に該鋭角部が基点となりメディアが破損する恐れがある。 Further, an intersection portion 01a formed by a bottom surface 11a of the straight body portion 11 (the lowermost portion in FIG. 1A) and a side surface 11b orthogonal to the bottom surface 11a, the straight body portion 11 and the reduced diameter portion 12 Both the boundary portion 01b and the vertical cross section including the apex 01c of the reduced diameter portion 12 form a convex curve (R surface). As described above, barrel polishing is performed by collision and contact between a workpiece and a medium in a barrel polishing tank. If the intersecting part 01a, the boundary part 01b, and the vertex 01c form an acute angle, when the work comes into contact with the medium, a strike mark may be formed on the surface of the work or may be damaged. In addition, when the workpiece and the medium collide, the acute angle portion becomes a base point and the medium may be damaged.
前記縮径部12は、図3に示すように頂点に向かって段階的に縮径している。例えば、図3(A)の縮径部12は、頂点を含む垂直方向断面が半楕円形状である。図3(B)の縮径部は、側面が上方に向かって同一の傾斜角を成した後、上端近傍で急激に傾斜している。図3(C)の縮径部は、側面が上方に向かって段階的に傾斜角が変化している。本実施形態では、図1および図2に示すように、4段階(図2におけるa~d)で縮径している。なお、図2の一点鎖線は異なる縮径率の境界を示す。縮径部12の縮径率(すなわち、側面の傾斜角度)を少なくとも2段階以上で変化させることで偏摩耗をより軽減させることができる。また、バレル研磨を行う際に、マスの流動性を向上させることができる。 The diameter-reduced portion 12 is gradually reduced in diameter toward the apex as shown in FIG. For example, the reduced diameter portion 12 in FIG. 3A has a semi-elliptical vertical cross section including the apex. The reduced diameter portion of FIG. 3B is abruptly inclined near the upper end after the side faces form the same inclination angle upward. In the reduced diameter portion of FIG. 3 (C), the inclination angle changes stepwise with the side surface upward. In this embodiment, as shown in FIGS. 1 and 2, the diameter is reduced in four stages (a to d in FIG. 2). In addition, the dashed-dotted line of FIG. 2 shows the boundary of a different diameter reduction rate. Uneven wear can be further reduced by changing the reduction ratio of the reduced diameter portion 12 (that is, the inclination angle of the side surface) in at least two stages. Further, when barrel polishing is performed, the fluidity of the mass can be improved.
前記底面11aの直径Xに対するメディアの高さY(前記頂点01cと前記底面11aとの距離)の比(Y/X)を0.5~1.5、より好ましくは0.8~1.0とすることで、バレル研磨の時間経過に伴うメディアの摩耗の際に偏摩耗が生じにくく、長時間にわたって同じ研磨状態を保持することができる。また、前記底面の径Xはワークの寸法に合わせて適宜選択することができるが、1~40mmより選択すると凹凸のあるワークの隅角部に対しても良好に研磨を行うことができる。また、バレル研磨における問題点として、ワークの形状によっては、バレル研磨中にワークの凹部や隅角部にメディアが噛み込まれることがあるが、前記底面の径Xを前述の範囲から選択することで、この現象を防ぐことができる。 The ratio (Y / X) of the media height Y (the distance between the vertex 01c and the bottom surface 11a) to the diameter X of the bottom surface 11a is 0.5 to 1.5, more preferably 0.8 to 1.0. Thus, uneven wear is unlikely to occur when the media wears with the lapse of time of barrel polishing, and the same polishing state can be maintained for a long time. Further, the diameter X of the bottom surface can be appropriately selected in accordance with the dimensions of the workpiece. However, if it is selected from 1 to 40 mm, it is possible to satisfactorily polish even the corners of the workpiece having irregularities. Also, as a problem in barrel polishing, depending on the shape of the workpiece, media may be caught in the concave portion or corner portion of the workpiece during barrel polishing, but the diameter X of the bottom surface should be selected from the above range. Therefore, this phenomenon can be prevented.
前記メディア01は基体となる樹脂と前記樹脂に分散された砥粒とで構成されている。前記樹脂が硬すぎるとワークとの衝突によってワークに打撃痕が生じ、柔らかすぎるとワークとの衝突の際に樹脂が変形して十分な研磨力を得ることが出来ない。ワークに打撃痕が発生しづらく、また十分な研磨力を得るには、前記樹脂の硬度(ビッカース硬さ)を10~30HVの範囲より選択することが好ましい。なお、前記樹脂は熱可塑性樹脂(例えば、ナイロン樹脂、ポリスチレン樹脂、ポリプロピレン樹脂、ポリアミド樹脂、AS樹脂、等)や熱硬化樹脂(例えば、フェノール樹脂、不飽和ポリエステル樹脂、ポリウレタン樹脂、エポキシ樹脂、ユリア樹脂、等)を好適に用いることができる。 The medium 01 is composed of a resin serving as a base and abrasive grains dispersed in the resin. If the resin is too hard, hitting marks are generated on the workpiece due to the collision with the workpiece. If the resin is too soft, the resin is deformed upon collision with the workpiece and sufficient polishing force cannot be obtained. It is preferable that the hardness (Vickers hardness) of the resin is selected from a range of 10 to 30 HV in order to make it difficult for a scratch mark to be generated on the workpiece and to obtain a sufficient polishing force. The resin is a thermoplastic resin (eg, nylon resin, polystyrene resin, polypropylene resin, polyamide resin, AS resin, etc.) or thermosetting resin (eg, phenol resin, unsaturated polyester resin, polyurethane resin, epoxy resin, urea). Resins, etc.) can be suitably used.
前記砥粒の含有率が高すぎるとメディア自体の硬度が高くなり、ワークとの衝突によってワークに打撃痕が生じる。また、前記含有率が低すぎると、ワークを研磨するための十分な研磨力を得ることが出来ない。ワークに打撃痕が発生しづらく、また十分な研磨力を得るには、前記砥粒の含有率を、メディアに対して30~70質量%の範囲より選択することが好ましい。砥粒としては、公知の材料(例えば、アルミナ、シリカ、炭化珪素、酸化鉄、酸化硼素、ジルコン、酸化クロム、ダイヤモンド、金剛砂、及びこれらの粉末、あるいはこれらを原料とした成形物、等)を好適に用いることができる。また前記材料より2以上選択した混合粉末を用いてもよい。また、砥粒の粒度は砥粒の種類、メディアの大きさ、ワークの性状および研磨の目的に応じて適宜選択することができる。 When the content of the abrasive grains is too high, the hardness of the media itself is increased, and a hitting mark is generated on the workpiece due to the collision with the workpiece. Moreover, when the said content rate is too low, sufficient polishing power for grind | polishing a workpiece | work cannot be obtained. It is preferable that the abrasive content is selected from the range of 30 to 70% by mass with respect to the media in order to make it difficult to generate impact marks on the workpiece and to obtain a sufficient polishing force. As the abrasive grains, known materials (for example, alumina, silica, silicon carbide, iron oxide, boron oxide, zircon, chromium oxide, diamond, gold sand, and powders thereof, or moldings made from these materials) are used. It can be used suitably. Moreover, you may use the mixed powder selected 2 or more from the said material. The grain size of the abrasive grains can be appropriately selected according to the type of abrasive grains, the size of the media, the properties of the workpiece, and the purpose of polishing.
前記メディアの重量が重すぎると、ワークとの衝突エネルギーが高すぎ、ワークとの衝突によってワークの表面に打撃痕が生じる。また、前記重量が軽すぎると、ワークとの衝突エネルギーが低すぎ、十分な研磨力が得られない。前記メディアの重量を0.01~50gの範囲より選択することが好ましく、0.02~40gの範囲より選択することがより好ましい。さらに、比重(真比重)を1.5~2.5の範囲より選択することが好ましく、1.8~2.2の範囲より選択することがより好ましい。バレル研磨を行う際は、通常、同一のメディアを複数個投入して研磨加工を行う。前記比重をこの範囲より選択することで、複数個のワークを投入して処理を行った際、全てのワークに対してメディアが均一に分散し、全てのワークに対して均等に研磨を行うことができる。 If the weight of the medium is too heavy, the collision energy with the workpiece is too high, and a collision mark is generated on the surface of the workpiece due to the collision with the workpiece. On the other hand, when the weight is too light, the collision energy with the workpiece is too low, and a sufficient polishing force cannot be obtained. The weight of the medium is preferably selected from the range of 0.01 to 50 g, and more preferably selected from the range of 0.02 to 40 g. Further, the specific gravity (true specific gravity) is preferably selected from the range of 1.5 to 2.5, and more preferably selected from the range of 1.8 to 2.2. When performing barrel polishing, usually, a plurality of identical media are put in and polished. By selecting the specific gravity from this range, when a plurality of workpieces are loaded and processed, the media is evenly distributed to all workpieces and evenly polished to all workpieces. Can do.
遠心バレル研磨装置(EC-2型:新東工業株式会社製)を用いて、バレル研磨によるメディアの形状の変化について調べた。ビッカース硬さが25HVの熱硬化製樹脂に砥粒を全体の60質量%となるように分散させた混合物を成形して実施形態に記載の形状をなすメディアを2種類作成した(底面13aの径X:6mm、前記底面11aの直径Xに対するメディアの高さYとの比(Y/X):1.0の形状をなすメディア(実施例1)と、底面11aの径X:6mm、前記底面11aの直径Xに対するメディアの高さYとの比(Y/X):1.3の形状をなすメディア(実施例2))。また、比較例として、前記混合物を用い、下記の形状のメディアを成形した。成形方法は、成形する形状に合わせて、鋳込み成形、押し出し成形、等公知の手法より適宜選択した。
 比較例1:径が6mmである球形のメディア。
 比較例2:一辺の長さが6mmである立方体のメディア。
 比較例3:一般の長さが6mmである正方形の底面と、該底面と直交する縦断面の長さが9mmである直方体のメディア。
 比較例4:直胴部と縮径部からなり、底面13aの径X:6mm、前記底面11aの直径Xに対するメディアの高さYとの比(Y/X):0.3のメディア。
 比較例5:直胴部と縮径部からなり、底面13aの径X:6mm、前記底面11aの直径Xに対するメディアの高さYとの比(Y/X):1.7のメディア。
Using a centrifugal barrel polishing apparatus (EC-2 type: manufactured by Shinto Kogyo Co., Ltd.), changes in the shape of the media due to barrel polishing were examined. Two types of media having the shape described in the embodiment were formed by molding a mixture in which abrasive grains were dispersed in a thermosetting resin having a Vickers hardness of 25 HV so as to be 60% by mass of the total (diameter of the bottom surface 13a). X: 6 mm, ratio of media height Y to diameter X of bottom surface 11a (Y / X): 1.0 media (Example 1), bottom surface 11a diameter X: 6 mm, bottom surface Ratio of media height Y to diameter X of 11a (Y / X): media having a shape of 1.3 (Example 2)). In addition, as a comparative example, a medium having the following shape was formed using the mixture. The molding method was appropriately selected from known methods such as casting and extrusion molding according to the shape to be molded.
Comparative Example 1: A spherical medium having a diameter of 6 mm.
Comparative Example 2: A cubic medium having a side length of 6 mm.
Comparative Example 3: A square bottom having a general length of 6 mm and a rectangular parallelepiped having a length of 9 mm perpendicular to the bottom.
Comparative Example 4: A medium having a straight body portion and a reduced diameter portion, having a diameter X of the bottom surface 13a of 6 mm, and a ratio of the media height Y to the diameter X of the bottom surface 11a (Y / X): 0.3.
Comparative Example 5: A medium having a straight body portion and a reduced diameter portion, and having a diameter X of the bottom surface 13a of 6 mm and a ratio of the media height Y to the diameter X of the bottom surface 11a (Y / X): 1.7.
黒色に塗装したワーク(底面10×10、厚み2mm、交点のR面1.0mm、長さ10mmのアングル鋼)の皮膜(塗装膜)除去を目的とした研磨加工を行った。
前記メディアとワークの比率を、容積比(メディア全体の容積/ワーク全体の容積)で5.0となるようにし、これを断面が六角形である4つのバレル研磨槽のそれぞれに、前記メディアを、前記バレル研磨槽の容積の1/2となるように投入した。その後、該バレル研磨槽を前記遠心バレル研磨装置に載置し、該バレル研磨槽を自転速度200rpm、公転速度200rpmにて0.5時間運転した。研磨加工終了後、バレル研磨槽を遠心バレル研磨装置より取り外し、該バレル研磨槽よりワークを取り出した後、新たに同量のワークをバレル研磨槽に投入した後、同様に研磨加工を行った。これらの操作を繰り返して、70回の研磨加工を行い、1回目の研磨と70回目の研磨における「メディアの形状」「ワークの打撃痕」「ワークの仕上げ」「研磨力」について評価を行った。各評価は下記の通りとした。
 メディアの形状:目視にて、初期の形状とほぼ同一(大きさは異なっていてもよい)の場合は○、若干の変化が認められる場合は△、初期の形状と大きく異なっていた場合は×とした。
 ワークの打撃痕 :目視で打撃痕が認められない場合は○、打撃痕が認められる場合は×とした。
 ワークの仕上げ:目視にて、ワークの前記L字形状部の隅角部の皮膜が除去されている場合は○、該隅角部の皮膜が除去されていない場合は×とした。
 研磨力    :研磨加工前と研磨加工後の重量変化を測定した。
Polishing was performed for the purpose of removing a film (paint film) of a black-coated workpiece (an angle steel having a bottom surface of 10 × 10, a thickness of 2 mm, an R surface at an intersection of 1.0 mm, and a length of 10 mm).
The volume ratio (volume of the entire medium / volume of the entire work) is set to 5.0 so that the ratio of the medium and the work is set to 4 barrel polishing tanks each having a hexagonal cross section. The barrel polishing tank was charged to ½ the volume. Thereafter, the barrel polishing tank was placed on the centrifugal barrel polishing apparatus, and the barrel polishing tank was operated for 0.5 hours at a rotation speed of 200 rpm and a revolution speed of 200 rpm. After completion of the polishing process, the barrel polishing tank was removed from the centrifugal barrel polishing apparatus, the workpiece was taken out from the barrel polishing tank, and the same amount of work was put into the barrel polishing tank, followed by polishing similarly. By repeating these operations, the polishing process was performed 70 times, and “media shape”, “work impact mark”, “work finish”, and “polishing power” in the first polishing and the 70th polishing were evaluated. . Each evaluation was as follows.
Media shape: Visually the same as the initial shape ○ (when the size may be different), △ if slight change is observed, △ if significantly different from the initial shape It was.
Blow mark of workpiece: “B” when no hit mark is visually observed, and “X” when a hit mark is observed.
Finishing of work: When the film of the corner portion of the L-shaped part of the work was removed visually, it was evaluated as ◯, and when the film of the corner portion was not removed, it was marked as x.
Polishing power: The change in weight before and after polishing was measured.
バレル研磨を行った後の評価結果を下記に示す。このように、本発明におけるメディアは、研磨時間の経過に伴うメディアの偏摩耗および研磨量の低下がなく、かつワークの隅角部においても良好にバレル研磨を行うことができることがわかる。
メディアの形状:70回の研磨加工後のメディアの形状は、実施例1、実施例2、比較例1は初期に比べ小さくなっているものの、形状に大きな変化は認められなかった、一方、比較例2は球形、比較例3は楕円体にそれぞれ近づいていた。比較例4および5は、前記径Xと前記高さYとの比(Y/X)がそれぞれ約0.5、約1.4まで変化していた。
ワークの打撃痕:何れのメディアによるバレル研磨においても、ワークへの打撃痕は確認できなかった。
ワークの仕上げ:実施例1、2は1回目および70回目のバレル研磨においても、ワークの隅角部の加工が完了していた。比較例1はいずれのバレル研磨においてもワークの隅角部の加工が完了しておらず、比較例2~5はいずれも1回目のバレル研磨ではワークの隅角部の加工が完了していたが、70回目の研磨ではワークの隅角部の加工が完了しておらず、メディアが偏摩耗したことでワークの隅角部との接触が不十分となったことがわかる。
研磨力    :研磨により形状に変化が生じるメディア(比較例2~5)によるバレル研磨では、いずれも1回目の研磨後のワークに比べ70回目の研磨後のワークとの表面粗さは大幅に大きくなっていることから、偏摩耗による形状の変化によって研磨力が減少していることが分かる。また、比較例1のメディアにより研磨されたワークは、1回目と70回目で大きな差がないものの、実施例1および実施例2のワークにより研磨されたワークの表面粗さより大きく、比較例1のメディアは十分な研磨力を有していないことがわかる。一方、実施例1および実施例2のメディアにより研磨されたワークの表面粗さは、研磨前より大幅に小さくなっており、かつ1回目の研磨後と70回目の研磨後のワークの表面粗さの差が小さいことから、長時間にわたって良好な研磨力を持続していることが分かる。特に、実施例1のメディアは実施例2によるメディアによる研磨より、1回目の研磨後と70回目の研磨後の差が小さいことから、より好ましいことがわかる。
The evaluation results after barrel polishing are shown below. Thus, it can be seen that the media according to the present invention is free from uneven wear of the media and a decrease in the polishing amount with the lapse of the polishing time, and can perform barrel polishing well even at the corners of the workpiece.
Media shape: The shape of the media after 70 polishing operations was smaller in Example 1, Example 2 and Comparative Example 1 than in the initial state, but no significant change was observed in the shape. Example 2 was close to a sphere, and Comparative Example 3 was close to an ellipsoid. In Comparative Examples 4 and 5, the ratio of the diameter X to the height Y (Y / X) was changed to about 0.5 and about 1.4, respectively.
Striking marks on the workpiece: Neither of the media was able to confirm the scratching marks on the workpiece in barrel polishing with any media.
Finishing of workpiece: In Examples 1 and 2, the machining of the corner portion of the workpiece was completed even in the first and 70th barrel polishing. In Comparative Example 1, processing of the corner portion of the workpiece was not completed in any barrel polishing, and in Comparative Examples 2 to 5, processing of the corner portion of the workpiece was completed in the first barrel polishing. However, it is understood that the machining of the corner portion of the workpiece is not completed in the 70th polishing, and the contact with the corner portion of the workpiece becomes insufficient due to the uneven wear of the media.
Polishing power: In barrel polishing with media (Comparative Examples 2 to 5) whose shape changes due to polishing, the surface roughness of the workpiece after the 70th polishing is significantly larger than that after the first polishing. Thus, it can be seen that the polishing force is reduced by the change in shape due to uneven wear. Moreover, although the workpiece | work grind | polished with the medium of the comparative example 1 does not have a big difference by the 1st time and the 70th time, it is larger than the surface roughness of the workpiece | work grind | polished by the workpiece | work of Example 1 and Example 2, It can be seen that the media does not have sufficient polishing power. On the other hand, the surface roughness of the workpiece polished by the media of Example 1 and Example 2 is significantly smaller than that before polishing, and the surface roughness of the workpiece after the first polishing and after the 70th polishing. From this, it can be seen that good polishing power is maintained for a long time. In particular, it can be seen that the media of Example 1 is more preferable than the media with Example 2 because the difference between the first polishing and the 70th polishing is smaller.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
本発明のバレル研磨用メディアは、乾式バレル研磨、湿式バレル研磨の何れにおいても好適に用いることができる。また、実施例に記載の遠心バレル研磨ばかりでなく、振動式バレル研磨装置、流動式バレル研磨装置、回転式バレル研磨装置等、公知のバレル研磨装置による研磨にも好適に用いることができる。
The barrel polishing media of the present invention can be suitably used for both dry barrel polishing and wet barrel polishing. Moreover, it can be suitably used not only for centrifugal barrel polishing described in the embodiments but also for polishing by a known barrel polishing apparatus such as a vibration barrel polishing apparatus, a fluidized barrel polishing apparatus, and a rotary barrel polishing apparatus.
 この出願は、日本国で2011年4月6日に出願された特願2011-084231号に基づいており、その内容は本出願の内容として、その一部を形成する。
 また、本発明は本明細書の詳細な説明により更に完全に理解できるであろう。しかしながら、詳細な説明および特定の実施例は、本発明の望ましい実施の形態であり、説明の目的のためにのみ記載されているものである。この詳細な説明から、種々の変更、改変が、当業者にとって明らかだからである。
 出願人は、記載された実施の形態のいずれをも公衆に献上する意図はなく、開示された改変、代替案のうち、特許請求の範囲内に文言上含まれないかもしれないものも、均等論下での発明の一部とする。
 本明細書あるいは請求の範囲の記載において、名詞及び同様な指示語の使用は、特に指示されない限り、または文脈によって明瞭に否定されない限り、単数および複数の両方を含むものと解釈すべきである。本明細書中で提供されたいずれの例示または例示的な用語(例えば、「等」)の使用も、単に本発明を説明し易くするという意図であるに過ぎず、特に請求の範囲に記載しない限り本発明の範囲に制限を加えるものではない。
This application is based on Japanese Patent Application No. 2011-084231 filed on April 6, 2011 in Japan, the contents of which form part of the present application.
The present invention will also be more fully understood from the detailed description herein. However, the detailed description and specific examples are preferred embodiments of the present invention and are described for illustrative purposes only. This is because various changes and modifications will be apparent to those skilled in the art from this detailed description.
The applicant does not intend to contribute any of the described embodiments to the public, and the disclosed modifications and alternatives that may not be included in the scope of the claims are equivalent. It is part of the invention under discussion.
In this specification or in the claims, the use of nouns and similar directives should be interpreted to include both the singular and the plural unless specifically stated otherwise or clearly denied by context. The use of any examples or exemplary terms provided herein (eg, “etc.”) is merely intended to facilitate the description of the invention and is not specifically recited in the claims. As long as it does not limit the scope of the present invention.
01       研磨体(メディア)
01a      交差部
01b      境界部
01c      頂点
11       直胴部
11a      底面
11b      側面
12       縮径部
01 Abrasive body (media)
01a Intersection part 01b Boundary part 01c Vertex 11 Straight body part 11a Bottom face 11b Side face 12 Reduced diameter part

Claims (8)

  1. 基体となる樹脂と前記樹脂に分散された砥粒とで構成されるバレル研磨用研磨体において、
    前記研磨体は一端面が前記研磨体の底面を形成する円柱状の直胴部と、前記直胴部の他端面から連続的に縮径して先端が前記研磨体の頂点を形成する縮径部とを備え、
    前記底面と前記直胴部の側面との交差部と、前記直胴部と前記縮径部との境界部および前記縮径部の頂点含む垂直方向断面と、はいずれも凸曲線を形成していることを特徴とするバレル研磨用研磨体。
    In a barrel polishing abrasive body composed of a resin as a base and abrasive grains dispersed in the resin,
    The polishing body has a cylindrical straight body portion whose one end surface forms the bottom surface of the polishing body, and a diameter reduction continuously from the other end surface of the straight body portion so that the tip forms the apex of the polishing body. With
    The intersecting portion between the bottom surface and the side surface of the straight body portion, the boundary portion between the straight body portion and the reduced diameter portion, and the vertical cross section including the apex of the reduced diameter portion all form a convex curve. A barrel polishing polishing body characterized by comprising:
  2. 前記縮径部は前記頂点に向かって少なくとも2段階以上で縮径されていることを特徴とする請求項1に記載のバレル研磨用研磨体。 2. The barrel polishing abrasive according to claim 1, wherein the reduced diameter portion is reduced in at least two steps toward the apex.
  3. 前記底面の直径と、当前記底面から前記頂点までの距離との比が1:0.5~1:1.5であることを特徴とする請求項1または請求項2に記載のバレル研磨用研磨体。 The barrel polishing according to claim 1 or 2, wherein a ratio of a diameter of the bottom surface to a distance from the bottom surface to the apex is 1: 0.5 to 1: 1.5. Polished body.
  4. 前記底面の直径と、当前記底面から前記頂点までの距離との比が1:0.8~1:1.0であることを特徴とする請求項1または請求項2に記載のバレル研磨用研磨体。 The barrel polishing according to claim 1 or 2, wherein a ratio of a diameter of the bottom surface to a distance from the bottom surface to the apex is 1: 0.8 to 1: 1.0. Polished body.
  5. 前記円形断面の直径が、1~40mmであることを特徴とする請求項1ないし請求項4のいずれか1つに記載のバレル研磨用研磨体。 The barrel polishing abrasive according to any one of claims 1 to 4, wherein a diameter of the circular cross section is 1 to 40 mm.
  6. 前記樹脂のビッカース硬さが10~30HVであることを特徴とする請求項1ないし請求項5のいずれか1つに記載のバレル研磨用研磨体。 The abrasive body for barrel polishing according to any one of claims 1 to 5, wherein the resin has a Vickers hardness of 10 to 30 HV.
  7. 前記砥粒は、前記研磨体に対して30~70質量%含有されていることを特徴とする請求項6に記載のバレル研磨用研磨体。 The barrel polishing abrasive body according to claim 6, wherein the abrasive grains are contained in an amount of 30 to 70 mass% with respect to the polishing body.
  8. 前記研磨体の質量が0.01~50gであり、かつ比重が1.5~2.5であることを特徴とする請求項6または請求項7に記載のバレル研磨用研磨体。 The barrel polishing abrasive according to claim 6 or 7, wherein the abrasive has a mass of 0.01 to 50 g and a specific gravity of 1.5 to 2.5.
PCT/JP2012/058872 2011-04-06 2012-04-02 Abrasive medium for barrel polishing WO2012137713A1 (en)

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CN201290000396.4U CN203751923U (en) 2011-04-06 2012-04-02 Polishing medium applied to drum polishing
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JP2016036852A (en) * 2014-08-05 2016-03-22 株式会社不二Wpc Fine dimple formation method and member provided with fine dimple formed by the same

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JP2015160896A (en) * 2014-02-27 2015-09-07 株式会社アライドマテリアル Mount material, workpiece processing method using the same, and mount body for flat surface processing
JP2016036852A (en) * 2014-08-05 2016-03-22 株式会社不二Wpc Fine dimple formation method and member provided with fine dimple formed by the same

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