US20070154278A1 - Centering pin - Google Patents
Centering pin Download PDFInfo
- Publication number
- US20070154278A1 US20070154278A1 US10/593,988 US59398805A US2007154278A1 US 20070154278 A1 US20070154278 A1 US 20070154278A1 US 59398805 A US59398805 A US 59398805A US 2007154278 A1 US2007154278 A1 US 2007154278A1
- Authority
- US
- United States
- Prior art keywords
- bolt
- receiving element
- element according
- recess
- tip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000002184 metal Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims description 17
- 230000007704 transition Effects 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 6
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052575 non-oxide ceramic Inorganic materials 0.000 claims description 3
- 239000011225 non-oxide ceramic Substances 0.000 claims description 3
- 229910052574 oxide ceramic Inorganic materials 0.000 claims description 3
- 239000011224 oxide ceramic Substances 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- 239000012777 electrically insulating material Substances 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000004323 axial length Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000010292 electrical insulation Methods 0.000 description 3
- -1 for example Inorganic materials 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
- B23Q16/001—Stops, cams, or holders therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
- B23Q3/183—Centering devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
- Y10S411/90—Fastener or fastener element composed of plural different materials
Definitions
- the invention relates to a receiving element useful, for example, as a centering pin or receiving pin for centering and receiving components, in particular a plurality of metal sheet parts or at least one metal sheet part having a threaded female element, and more particularly employable in association with welding tools, in particular pressure welding tools, apparatus or machines.
- a receiving element is disclosed in WO 2004/069 468 A1, having a bolt that, in the area of its external surface, which is largely parallel to a longitudinal axis, includes at least two recesses with apertures. Arranged in these recesses are pins that comprise or contain wear-resistant material and that extend somewhat radially through said apertures and project over the external surface with a predefined overhang.
- Such receiving elements can be introduced into bores of at least one component for fixing and/or aligning for subsequent machining. For instance, if two metal sheets are to be joined to one another by welding, these contain receiving bores that match one another and into which a receiving element of the type cited is subsequently introduced for centering and receiving the metal sheets.
- a plurality of such receiving elements are usefully provided as production or assembly aids.
- the receiving elements can also be employed as holding pins and/or guide pins in machines, systems, or machining systems for components, these being for instance automatic welding machines, punches, or presses.
- Production of these previously known receiving elements requires a certain complexity because first the at least two lateral apertures must be added to the bolt, which normally comprises metal, and then the at least two pins, which comprise or contain sintered material, must be introduced into the apertures, whereby in a useful manner in a further machining step, the pins projecting outward from the bolt are machined such that the surface areas of the pins that overhang farthest radially are located on a common surface. Even without performing this latter method step, adding at least two apertures to the bolt and preparing and inserting the two aforesaid pins entails production complexity that is not insubstantial.
- a receiving element is disclosed in JP 02 290 696 A that has a sleeve comprising a sintered material, through which a bolt, provided with a tip, passes.
- the end of the bolt facing away from the tip is provided with a thread that engages in a threaded bore of an element provided with a male thread, the aforementioned sleeve being clamped axially between the bolt tip and the element.
- the production of the cylindrical sleeve made of sintered material is quite complex in order to avoid radial play in terms of the bolt that passes through and conversely to avoid undesired radial compression and associated waste during production.
- this receiving element also comprises at least three parts, specifically sleeve and bolt and the threaded element that has a male thread, and thus the various machining steps being disadvantageous especially during serial production of large numbers of units.
- the underlying object of the invention is to further develop a receiving element with less structural complexity while avoiding the aforesaid disadvantages such that high dimensional stability and positioning accuracy are assured for a long service life.
- the production of the receiving element should not require great complexity and/or material consumption, and should be economical to implement.
- the receiving elements should especially be used in welding systems or devices, for example, for producing pressure welded joints.
- the receiving element in accordance with the invention is characterized by a simple and functionally appropriate structure.
- the bolt comprises wear-resistant sintered materials, preferably oxide ceramics or non-oxide ceramics, for example, Al 2 O 3 , ZrO 2 , or Si 3 N 4 , or mixtures thereof, and contains at a forward end thereof a recess in which a tip, comprising metal, advantageously, for example, steel or high-grade steel, engages and is attached at one end section.
- a direct or immediate connection is provided between the tip, via an end section thereof, and the recess, advantageously embodied, for example, as a blind hole, provided in the bolt.
- the recess which is preferably coaxial with the longitudinal axis and/or penetrated thereby, permits a lasting and loadable connection in the comparatively short axially forward area of the bolt without a reduction in the cross-section of the bolt, whish is made of the high-performance ceramics or sintered material used, being necessary over the entire axial length.
- the interiorly situated forward connecting area extends only over a fraction (portion) of the entire length of the bolt, advantageously less than 50%, and more preferably less than 30% thereof.
- the end section of the tip and/or the forward connecting area possesses an axial length that is substantially smaller than the total length of the bolt. Furthermore, it is particularly important that the interiorly situated connecting area is reliably protected from attack by an environmental medium, for example, steam or aggressive gases.
- the fastening of the tip or its end section in the axial recess of the bolt is advantageously embodied as an adhesive joint, shrink fit, press fit or clamp connection.
- Mechanical processing for example, circular grinding, is used to grind the exterior surface of the bolt embodied from sintered material and/or high-performance ceramics to the required aperture diameter for the component to be processed, in particular metal sheet or threaded female element.
- the metal tip prevents the extremely disadvantageous breakage with a high degree of functional assuredness.
- components encountered in connection with the invention, in particular metal sheets can be readily joined to one another using the suggested receiving elements, in particular in welding tools and/or pressure welding tools, even with threaded female elements that are quite small, in particular with M4, M5, M6, or M8 female threads, avoiding failure times and idle times for the welding tools or automatic welding systems and attaining long useful life periods.
- the bolt is advantageously produced, for example, by dry pressing, extrusion, or in an injection molding process and/or by mechanical processing.
- the bolt is advantageously embodied as a part, either as tube or bar, and is provided and/or fitted with the metal tip at the forward free end.
- a fastening body made of an insulating material advantageously, for example, plastic
- an adhesive joint, shrink fit, press fit, or clamp connection preferably being provided.
- the inventive receiving element is characterized primarily by the following improved properties: specifically, high wear-resistance and/or extremely long service life and/or good dimensional stability and/or precise positioning accuracy and/or high surface quality and/or optimized electrical insulation.
- FIG. 1 is a schematic depiction of an axial section of a first exemplary embodiment according to the invention.
- FIG. 2 is an axial section of another exemplary embodiment according to the invention having a fastening body made of an insulating material for additional insulation.
- a receiving element comprises a bolt 2 , and a tip 4 that is produced as a separate component having an end section 6 which engages in a recess 8 of the bolt 2 at a forward end of the latter.
- the bolt 2 comprises or contains wear-resistant sintered material, preferably oxide ceramics, such as, for example, Al 2 O 3 or ZrO 2 , or non-oxide ceramics such as Si 3 N 4 , or mixtures thereof.
- the forward section 10 of the pin 4 projects axially out of the bolt 2 and presents an exterior surface 12 that is at least approximately and/or largely conical.
- the tip 4 or the forward section 10 thereof includes a maximum external diameter 14 that is smaller by a prescribed amount than the external diameter 16 of the bolt 2 or the exterior surface 18 thereof.
- the recess 8 in the forward end of the bolt 2 is preferably embodied as a blind hole, and the end section 6 extends axially over only a fraction of the entire length of the bolt 2 .
- the exterior surface 18 runs largely parallel to the longitudinal axis 20 of the bolt or the entire receiving element and is advantageously embodied as a cylindrical exterior surface that is coaxial with the longitudinal axis 20 .
- the exterior surface 18 can have a polygonal exterior contour.
- a transition area 22 that tapers toward the end section 6 is present between the forward, advantageously conical, end section 6 and the exterior surface 18 of the bolt 2 .
- the transition area 22 is usefully a component of the bolt 2
- the transition area 22 can alternatively also be a component of the tip 4 .
- the receiving element includes a stepped exterior contour with the forward section 10 of the tip 4 projecting out of the bolt 2 , the maximum external diameter 14 being substantially smaller than the external diameter 16 of the bolt.
- the transition area 22 presents a substantially smaller axial extension than the end section 6 .
- the takeout angle or cone angle of the transition area 22 is preferably substantially larger than the takeout angle or cone angle of the end section 6 .
- the tip 4 comprises metal, advantageously steel or high-quality steel, so that, even when the external diameters of the receiving element and the bolt 2 are quite small, the tip 4 will not be damaged or broken off and/or a long service life or useful life is attained for the receiving element.
- the direct connection of the tip 4 or the end section 6 thereof in the correspondingly embodied recess 8 is provided as an adhesive joint, shrink fit, press fit, or clamp connection.
- the recess 8 is advantageously coaxial with the longitudinal axis 20 .
- a step 24 is present between the axially projecting forward section 4 and the end section 6 arranged in the recess 8 , such that the maximum external diameter 14 of the forward section 10 is larger by a prescribed amount than the external diameter 26 of the end section 6 .
- the step 24 thus forms a defined stop, in particular during insertion and/or when producing the connection between the bolt 2 and the tip 4 , which provides exact axial positioning and ultimately a defined axial length of the entire receiving element. Moreover, impermissibly high loading or even destruction of the connection between the tip 4 and the bolt 2 is avoided by virtue of the step 24 .
- the bolt 2 contains a fastening body 30 at an end facing away from the tip 4 for placing the receiving element in a tool, for example, a pressure welding tool.
- the fastening body 30 contains a flange, advantageously embodied as a radial extension for placement in the tool.
- the receiving element is preferably embodied as a centering pin or receiving pin, and is used for centering and receiving components, in particular a plurality of metal sheet parts or at least one metal sheet part having a threaded female element.
- the receiving element is provided primarily for employment and/or use in welding tools, in particular pressure welding tools or apparatus or machines.
- the inventive receiving element is characterized by relatively small external dimensions.
- the external diameter 16 of the bolt 2 is largely in the range of 3 to 12 mm, preferably 3.5 to 10 mm, and in particular from 4 to 8.5 mm.
- inventive receiving element even very small threaded female elements having internal diameters of M4 or M5 or M6 or M8 threads can be centered by means of the receiving element or received thereby and in associated machines or tools, such as, for example, pressure welding machines, can be joined to metal sheet parts, whereby even with such small radial dimensions, the tip is prevented with certainty from breaking off due to the suggested embodiment of the metal tip 4 and its integration into the bolt 2 made of high-performance ceramics and/or wear-resistant sintered material and ultimately high functional security and/or service life is attained.
- FIG. 2 illustrates another exemplary embodiment, according to which the fastening body 30 is not an integral component of the bolt 2 but rather is joined to the bolt 2 as a separate component.
- the fastening body 30 comprises a special electrically insulating material, for example, plastic, in order to assure additional and/or improved electrical insulation of the receiving element with respect to the tool, in particular a pressure welding tool.
- the bolt 2 contains a second recess 32 in which a connecting section 34 of the fastening section 30 engages.
- the connecting section 34 is joined in the second recess 32 by an adhesive joint, shrink fit, press fit or clamp connection.
- the fastening body contains a radial expansion and/or a flange 36 , the external diameter of which is greater than the external diameter of the bolt 2 .
- a step is present between the connecting section 34 and the flange 36 , which serves to provide defined placement and/or axial alignment of the fastening body 30 with respect to the bolt 2 .
- the bolt 2 contains a massive intermediate area 38 that assures high stability and/or strength of the bolt 2 and thus of the entire receiving element.
- the bolt 2 can have a single central recess that extends across the entire axial length. If, corresponding to FIG. 2 , a separate fastening body 30 is provided at the back end, however, there is no immediate axial connection between the tip 4 arranged at the forward end and the fastening body 30 and consequently axial connecting forces between the tip 4 and the fastening body 30 are avoided in an advantageous manner. It is hereby also further stated that an interiorly situated recess can extend axially through the entire length of the bolt, including the integrally formed connecting body thereof, as well, alternatively to the embodiment in accordance with FIG. 1 . However, the connecting area in such an embodiment is provided solely on the forward end of the bolt 2 .
Abstract
A receiving element which can be introduced into a borehole of at least one component includes a bolt presenting an outer surface that is approximately parallel and advantageously coaxial to a longitudinal axis of the bolt. The receiving element requires few materials and can therefore be produced at a low constructional cost while being provided with high dimensional stability and positioning accuracy. The bold includes an abrasion-resistant sintered material, and a metal tip provided on the front end of the shaft. The end part of the tip is engageable in a recess of the bolt, and there is a direct connection between the end part and the recess in the connection region on the front end of the bolt.
Description
- The invention relates to a receiving element useful, for example, as a centering pin or receiving pin for centering and receiving components, in particular a plurality of metal sheet parts or at least one metal sheet part having a threaded female element, and more particularly employable in association with welding tools, in particular pressure welding tools, apparatus or machines.
- A receiving element is disclosed in WO 2004/069 468 A1, having a bolt that, in the area of its external surface, which is largely parallel to a longitudinal axis, includes at least two recesses with apertures. Arranged in these recesses are pins that comprise or contain wear-resistant material and that extend somewhat radially through said apertures and project over the external surface with a predefined overhang. Such receiving elements can be introduced into bores of at least one component for fixing and/or aligning for subsequent machining. For instance, if two metal sheets are to be joined to one another by welding, these contain receiving bores that match one another and into which a receiving element of the type cited is subsequently introduced for centering and receiving the metal sheets. Particularly in the case of large components, a plurality of such receiving elements are usefully provided as production or assembly aids. The receiving elements can also be employed as holding pins and/or guide pins in machines, systems, or machining systems for components, these being for instance automatic welding machines, punches, or presses. Production of these previously known receiving elements requires a certain complexity because first the at least two lateral apertures must be added to the bolt, which normally comprises metal, and then the at least two pins, which comprise or contain sintered material, must be introduced into the apertures, whereby in a useful manner in a further machining step, the pins projecting outward from the bolt are machined such that the surface areas of the pins that overhang farthest radially are located on a common surface. Even without performing this latter method step, adding at least two apertures to the bolt and preparing and inserting the two aforesaid pins entails production complexity that is not insubstantial.
- Moreover, a receiving element is disclosed in JP 02 290 696 A that has a sleeve comprising a sintered material, through which a bolt, provided with a tip, passes. The end of the bolt facing away from the tip is provided with a thread that engages in a threaded bore of an element provided with a male thread, the aforementioned sleeve being clamped axially between the bolt tip and the element. The production of the cylindrical sleeve made of sintered material is quite complex in order to avoid radial play in terms of the bolt that passes through and conversely to avoid undesired radial compression and associated waste during production. In addition, this receiving element also comprises at least three parts, specifically sleeve and bolt and the threaded element that has a male thread, and thus the various machining steps being disadvantageous especially during serial production of large numbers of units.
- Based upon the foregoing, the underlying object of the invention is to further develop a receiving element with less structural complexity while avoiding the aforesaid disadvantages such that high dimensional stability and positioning accuracy are assured for a long service life. The production of the receiving element should not require great complexity and/or material consumption, and should be economical to implement. Moreover, it should be possible without significant problem to assure the electrical insulation that is used when the receiving element is used or employed for producing a weld joint, in particular for metal sheet parts and/or one metal sheet part with threaded female elements. Furthermore, the receiving elements should especially be used in welding systems or devices, for example, for producing pressure welded joints.
- The receiving element in accordance with the invention is characterized by a simple and functionally appropriate structure. The bolt comprises wear-resistant sintered materials, preferably oxide ceramics or non-oxide ceramics, for example, Al2O3, ZrO2, or Si3N4, or mixtures thereof, and contains at a forward end thereof a recess in which a tip, comprising metal, advantageously, for example, steel or high-grade steel, engages and is attached at one end section. In the interior of the bolt, a direct or immediate connection is provided between the tip, via an end section thereof, and the recess, advantageously embodied, for example, as a blind hole, provided in the bolt. The recess, which is preferably coaxial with the longitudinal axis and/or penetrated thereby, permits a lasting and loadable connection in the comparatively short axially forward area of the bolt without a reduction in the cross-section of the bolt, whish is made of the high-performance ceramics or sintered material used, being necessary over the entire axial length. The interiorly situated forward connecting area extends only over a fraction (portion) of the entire length of the bolt, advantageously less than 50%, and more preferably less than 30% thereof. The end section of the tip and/or the forward connecting area possesses an axial length that is substantially smaller than the total length of the bolt. Furthermore, it is particularly important that the interiorly situated connecting area is reliably protected from attack by an environmental medium, for example, steam or aggressive gases. The fastening of the tip or its end section in the axial recess of the bolt is advantageously embodied as an adhesive joint, shrink fit, press fit or clamp connection. Mechanical processing, for example, circular grinding, is used to grind the exterior surface of the bolt embodied from sintered material and/or high-performance ceramics to the required aperture diameter for the component to be processed, in particular metal sheet or threaded female element.
- In contrast to receiving elements with tips made of ceramics, which can break off relatively easily, particularly when they have small diameters, using the metal tip prevents the extremely disadvantageous breakage with a high degree of functional assuredness. Thus components encountered in connection with the invention, in particular metal sheets, can be readily joined to one another using the suggested receiving elements, in particular in welding tools and/or pressure welding tools, even with threaded female elements that are quite small, in particular with M4, M5, M6, or M8 female threads, avoiding failure times and idle times for the welding tools or automatic welding systems and attaining long useful life periods. The bolt is advantageously produced, for example, by dry pressing, extrusion, or in an injection molding process and/or by mechanical processing. The bolt is advantageously embodied as a part, either as tube or bar, and is provided and/or fitted with the metal tip at the forward free end.
- Moreover, in particular for optimizing the insulation, a fastening body made of an insulating material, advantageously, for example, plastic, can be provided at the other end of the bolt from the tip, an adhesive joint, shrink fit, press fit, or clamp connection preferably being provided. By using high-performance ceramics for the bolt in conjunction with the tip made of metal, advantageously steel, and optionally arranging the fastening body made of insulating material at the other end, the inventive receiving element is characterized primarily by the following improved properties: specifically, high wear-resistance and/or extremely long service life and/or good dimensional stability and/or precise positioning accuracy and/or high surface quality and/or optimized electrical insulation.
- The invention is explained in greater detail in the following using the exemplary embodiments depicted in the drawings, without this resulting in any limitation.
-
FIG. 1 is a schematic depiction of an axial section of a first exemplary embodiment according to the invention; and -
FIG. 2 is an axial section of another exemplary embodiment according to the invention having a fastening body made of an insulating material for additional insulation. - In accordance with
FIG. 1 , a receiving element comprises abolt 2, and atip 4 that is produced as a separate component having anend section 6 which engages in arecess 8 of thebolt 2 at a forward end of the latter. Thebolt 2 comprises or contains wear-resistant sintered material, preferably oxide ceramics, such as, for example, Al2O3 or ZrO2, or non-oxide ceramics such as Si3N4, or mixtures thereof. Theforward section 10 of thepin 4 projects axially out of thebolt 2 and presents anexterior surface 12 that is at least approximately and/or largely conical. In the exit area from thebolt 2, thetip 4 or theforward section 10 thereof includes a maximumexternal diameter 14 that is smaller by a prescribed amount than theexternal diameter 16 of thebolt 2 or theexterior surface 18 thereof. Therecess 8 in the forward end of thebolt 2 is preferably embodied as a blind hole, and theend section 6 extends axially over only a fraction of the entire length of thebolt 2. - The
exterior surface 18 runs largely parallel to thelongitudinal axis 20 of the bolt or the entire receiving element and is advantageously embodied as a cylindrical exterior surface that is coaxial with thelongitudinal axis 20. Alternatively, theexterior surface 18 can have a polygonal exterior contour. As can be seen, atransition area 22 that tapers toward theend section 6 is present between the forward, advantageously conical,end section 6 and theexterior surface 18 of thebolt 2. While thetransition area 22 is usefully a component of thebolt 2, thetransition area 22 can alternatively also be a component of thetip 4. The receiving element includes a stepped exterior contour with theforward section 10 of thetip 4 projecting out of thebolt 2, the maximumexternal diameter 14 being substantially smaller than theexternal diameter 16 of the bolt. Thetransition area 22 presents a substantially smaller axial extension than theend section 6. Moreover, the takeout angle or cone angle of thetransition area 22 is preferably substantially larger than the takeout angle or cone angle of theend section 6. - Due to the substantially smaller
external diameter 14 of theforward section 10 relative to theexternal diameter 16 of thebolt 2 and/or due to thetransition area 22 according to the invention, certain introduction of the receiving element into an associated bore of the components to be centered by virtue of the receiving element, especially metal sheet and threaded female element, is assured. Thetip 4 comprises metal, advantageously steel or high-quality steel, so that, even when the external diameters of the receiving element and thebolt 2 are quite small, thetip 4 will not be damaged or broken off and/or a long service life or useful life is attained for the receiving element. - In a particularly advantageous embodiment, the direct connection of the
tip 4 or theend section 6 thereof in the correspondingly embodiedrecess 8 is provided as an adhesive joint, shrink fit, press fit, or clamp connection. Therecess 8 is advantageously coaxial with thelongitudinal axis 20. For precise axial positioning of thetip 4 in thebolt 2, astep 24 is present between the axially projectingforward section 4 and theend section 6 arranged in therecess 8, such that the maximumexternal diameter 14 of theforward section 10 is larger by a prescribed amount than theexternal diameter 26 of theend section 6. Thestep 24 thus forms a defined stop, in particular during insertion and/or when producing the connection between thebolt 2 and thetip 4, which provides exact axial positioning and ultimately a defined axial length of the entire receiving element. Moreover, impermissibly high loading or even destruction of the connection between thetip 4 and thebolt 2 is avoided by virtue of thestep 24. - The
bolt 2 contains a fasteningbody 30 at an end facing away from thetip 4 for placing the receiving element in a tool, for example, a pressure welding tool. The fasteningbody 30 contains a flange, advantageously embodied as a radial extension for placement in the tool. As noted above, the receiving element is preferably embodied as a centering pin or receiving pin, and is used for centering and receiving components, in particular a plurality of metal sheet parts or at least one metal sheet part having a threaded female element. Furthermore, the receiving element is provided primarily for employment and/or use in welding tools, in particular pressure welding tools or apparatus or machines. Moreover, the inventive receiving element is characterized by relatively small external dimensions. Thus, theexternal diameter 16 of thebolt 2 is largely in the range of 3 to 12 mm, preferably 3.5 to 10 mm, and in particular from 4 to 8.5 mm. Thus, when using the inventive receiving element, even very small threaded female elements having internal diameters of M4 or M5 or M6 or M8 threads can be centered by means of the receiving element or received thereby and in associated machines or tools, such as, for example, pressure welding machines, can be joined to metal sheet parts, whereby even with such small radial dimensions, the tip is prevented with certainty from breaking off due to the suggested embodiment of themetal tip 4 and its integration into thebolt 2 made of high-performance ceramics and/or wear-resistant sintered material and ultimately high functional security and/or service life is attained. -
FIG. 2 illustrates another exemplary embodiment, according to which thefastening body 30 is not an integral component of thebolt 2 but rather is joined to thebolt 2 as a separate component. Thefastening body 30 comprises a special electrically insulating material, for example, plastic, in order to assure additional and/or improved electrical insulation of the receiving element with respect to the tool, in particular a pressure welding tool. As can be seen, at a back end, thebolt 2 contains asecond recess 32 in which a connectingsection 34 of thefastening section 30 engages. The connectingsection 34 is joined in thesecond recess 32 by an adhesive joint, shrink fit, press fit or clamp connection. Furthermore, the fastening body contains a radial expansion and/or aflange 36, the external diameter of which is greater than the external diameter of thebolt 2. A step is present between the connectingsection 34 and theflange 36, which serves to provide defined placement and/or axial alignment of thefastening body 30 with respect to thebolt 2. As in the exemplary embodiment in accordance withFIG. 1 , between the tworecesses bolt 2 contains a massiveintermediate area 38 that assures high stability and/or strength of thebolt 2 and thus of the entire receiving element. - Alternatively, in the framework of the invention, the
bolt 2 can have a single central recess that extends across the entire axial length. If, corresponding toFIG. 2 , aseparate fastening body 30 is provided at the back end, however, there is no immediate axial connection between thetip 4 arranged at the forward end and thefastening body 30 and consequently axial connecting forces between thetip 4 and thefastening body 30 are avoided in an advantageous manner. It is hereby also further stated that an interiorly situated recess can extend axially through the entire length of the bolt, including the integrally formed connecting body thereof, as well, alternatively to the embodiment in accordance withFIG. 1 . However, the connecting area in such an embodiment is provided solely on the forward end of thebolt 2. -
- 2 Bolt
- 4 Tip
- 6 End section of 4
- 8 Recess in 2
- 10 Forward section of 4
- 12 Exterior surface of 6
- 14 Maximum external diameter of 6
- 16 External diameter of 2
- 18 Exterior surface of 2
- 20 Longitudinal axis
- 22 Transition area
- 24 Step between 4 and 6
- 26 External diameter of 6
- 30 Fastening body
- 32 Second recess in 2
- 34 Connecting section of 30
- 36 Flange of 30
- 38 Massive intermediate area of 2
Claims (26)
1-10. (canceled)
11. A receiving element, comprising:
a bolt having an exterior surface that is substantially parallel to a longitudinal axis of the bolt and that can be introduced into a bore in at least one component, said bolt including or containing wear-resistant sintered material and including a recess at a forward end thereof; and
a tip comprised of metal arranged at the forward end of said bolt, the tip including an end section which engages in said recess of said bolt, a direct connection between said end section of said tip and said recess in said bold existing in a connecting area provided at the forward end of said bolt which extends only over a portion of an entire length of said bolt, said tip further including a forward section which projects axially out of said bolt, a transition area being interposed between the forward section of said tip and the forward end of said bolt, said transition area tapering to said forward section of the tip in a manner such that the receiving element has a stepped exterior contour, said forward section having a maximum external diameter that is less than a corresponding exterior diameter of said bolt by a prescribed amount.
12. A receiving element according to claim 11 , wherein said exterior surface is coaxial with said axis.
13. A receiving element according to claim 11 , wherein said at least one component includes at least two components.
14. A receiving element according to claim 11 , wherein said end section of said tip is joined in said recess to said bolt by at least one of an adhesive joint, shrink fit, press fit or clamp connection.
15. A receiving element according to claim 11 , wherein said end section which engages in said recess has an external diameter that is smaller by a prescribed amount than the maximum external diameter of said forward section.
16. A receiving element according to claim 11 , wherein a step is provided between said forward section and said end section of said tip that defines an axial stop with respect to said bolt.
17. A receiving element according to claim 11 , wherein said forward section has an exterior surface that tapers substantially conically toward a free end with a prescribed takeout angle.
18. A receiving element according to claim 11 , wherein said exterior surface of said transition area has a transition takeout angle that is substantially greater than the substantially conical takeout angle of said forward section.
19. A receiving element according to claim 11 , wherein said exterior diameter of said bolt is in a range of 3 to 12 mm.
20. A receiving element according to claim 19 , wherein said range is 3.5 to 10 mm.
21. A receiving element according to claim 20 , wherein said range is 4 to 8.5 mm.
22. A receiving element according to claim 11 , wherein said bolt includes a fastening body that is an integral component of said bolt and that comprises a same material as said bolt, said fastening body being disposed at an other end said bolt opposite to said forward end.
23. A receiving element according to claim 22 , wherein said fastening body includes a flange having an external flange diameter which is larger than said external diameter of said bolt.
24. A receiving body according to claim 11 , further comprising a fastening body comprised of an electrically insulating material disposed at an other end said bolt opposite to said forward end.
25. A receiving element according to claim 24 , wherein:
said bolt includes a second recess; and
said fastening body includes a connecting section that engages in said second recess.
26. A receiving element according to claim 24 , wherein said connecting part is joined directly to said bolt by means of at least one of an adhesive joint, a shrink fit, a press fit or a clamp connection.
27. A receiving element according to claim 24 , wherein said fastening body includes a flange having an external flange diameter which is larger than said external diameter of said bolt.
28. A receiving element according to claim 27 , wherein:
said bolt includes a second recess; and
said fastening body includes a connecting section that engages in said second recess.
29. A receiving element according to claim 28 , wherein said connecting part is joined directly to said bolt by means of at least one of an adhesive joint, a shrink fit, a press fit or a clamp connection.
30. A receiving element according to claim 11 , wherein said wear-resistant sintered materials comprise oxide ceramics or non-oxide ceramics.
31. A receiving element according to claim 30 , said ceramics include Al2O3, ZrO2, or Si3N4, or mixtures thereof.
32. A receiving element according to claim 11 , wherein said portion of the entire length of said bolt extends over less than 50% of said entire length.
33. A receiving element according to claim 32 , wherein said portion of the entire length of said bolt extends over less than 30% of said entire length.
34. A receiving element according to claim 11 , wherein said receiving element is configured for use in welding equipment.
35. A receiving element according to claim 34 , wherein said welding equipment includes a pressure welding tool.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202004004744 | 2004-03-24 | ||
DE20-2004-004-744.6 | 2004-03-24 | ||
PCT/EP2005/002924 WO2005092567A1 (en) | 2004-03-24 | 2005-03-18 | Centering pin |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070154278A1 true US20070154278A1 (en) | 2007-07-05 |
Family
ID=34673319
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/593,988 Abandoned US20070154278A1 (en) | 2004-03-24 | 2005-03-18 | Centering pin |
US12/839,951 Expired - Fee Related US7926693B2 (en) | 2004-03-24 | 2010-07-20 | Centering pin with a wear-resistant sintered body and metal tip |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/839,951 Expired - Fee Related US7926693B2 (en) | 2004-03-24 | 2010-07-20 | Centering pin with a wear-resistant sintered body and metal tip |
Country Status (14)
Country | Link |
---|---|
US (2) | US20070154278A1 (en) |
EP (1) | EP1727647B1 (en) |
JP (1) | JP4791448B2 (en) |
KR (1) | KR101194327B1 (en) |
CN (1) | CN100528476C (en) |
AT (1) | ATE381979T1 (en) |
BR (1) | BRPI0509092A (en) |
CA (1) | CA2560872C (en) |
DE (2) | DE502005002344D1 (en) |
ES (1) | ES2297700T3 (en) |
MX (1) | MXPA06010752A (en) |
RS (1) | RS51102B (en) |
RU (1) | RU2355550C2 (en) |
WO (1) | WO2005092567A1 (en) |
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WO2011109658A2 (en) * | 2010-03-04 | 2011-09-09 | Kop-Flex, Inc. | Fastener for flexible element couplings |
CN103056237A (en) * | 2011-10-21 | 2013-04-24 | 北汽福田汽车股份有限公司 | Workpiece positioning mechanism and stamping mold |
US11738392B1 (en) * | 2019-08-23 | 2023-08-29 | John Eric Chapman | Fastening systems, fastening methods, and methods of impregnating fastening components |
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WO2011109658A3 (en) * | 2010-03-04 | 2011-12-22 | Kop-Flex, Inc. | Fastener for flexible element couplings |
CN103056237A (en) * | 2011-10-21 | 2013-04-24 | 北汽福田汽车股份有限公司 | Workpiece positioning mechanism and stamping mold |
US11738392B1 (en) * | 2019-08-23 | 2023-08-29 | John Eric Chapman | Fastening systems, fastening methods, and methods of impregnating fastening components |
Also Published As
Publication number | Publication date |
---|---|
BRPI0509092A (en) | 2007-08-28 |
EP1727647A1 (en) | 2006-12-06 |
RU2006137297A (en) | 2008-05-10 |
WO2005092567A1 (en) | 2005-10-06 |
CN1933936A (en) | 2007-03-21 |
KR20070003963A (en) | 2007-01-05 |
DE502005002344D1 (en) | 2008-02-07 |
RU2355550C2 (en) | 2009-05-20 |
EP1727647B1 (en) | 2007-12-26 |
CA2560872A1 (en) | 2005-03-18 |
ES2297700T3 (en) | 2008-05-01 |
JP4791448B2 (en) | 2011-10-12 |
RS20060533A (en) | 2008-09-29 |
RS51102B (en) | 2010-10-31 |
US7926693B2 (en) | 2011-04-19 |
KR101194327B1 (en) | 2012-10-24 |
JP2007535411A (en) | 2007-12-06 |
CA2560872C (en) | 2010-01-12 |
US20100284766A1 (en) | 2010-11-11 |
CN100528476C (en) | 2009-08-19 |
MXPA06010752A (en) | 2006-12-15 |
ATE381979T1 (en) | 2008-01-15 |
DE202005004593U1 (en) | 2005-06-09 |
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Legal Events
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AS | Assignment |
Owner name: FRIATEC AKTIENGESELLSCHAFT, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCHRAMM, PETER;REEL/FRAME:018825/0968 Effective date: 20061026 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |