WO2006000460A1 - Outils de decoupage ou lames d'estampage presentant des lignes de coupe - Google Patents

Outils de decoupage ou lames d'estampage presentant des lignes de coupe Download PDF

Info

Publication number
WO2006000460A1
WO2006000460A1 PCT/EP2005/006986 EP2005006986W WO2006000460A1 WO 2006000460 A1 WO2006000460 A1 WO 2006000460A1 EP 2005006986 W EP2005006986 W EP 2005006986W WO 2006000460 A1 WO2006000460 A1 WO 2006000460A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting line
cutting
laser
controlled
hardening
Prior art date
Application number
PCT/EP2005/006986
Other languages
German (de)
English (en)
Inventor
Anton Haas
Original Assignee
Böhler-Uddeholm Precision Strip GmbH & Co. KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Böhler-Uddeholm Precision Strip GmbH & Co. KG filed Critical Böhler-Uddeholm Precision Strip GmbH & Co. KG
Publication of WO2006000460A1 publication Critical patent/WO2006000460A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/60—Making other particular articles cutlery wares; garden tools or the like
    • B21D53/64—Making other particular articles cutlery wares; garden tools or the like knives; scissors; cutting blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/20—Making tools by operations not covered by a single other subclass
    • B21D37/205—Making cutting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B23P15/40—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools shearing tools

Definitions

  • the invention relates to cutting tools or punching knives and to a method for producing cutting tools or punching knives for punching cardboard, leather and textiles or the like.
  • a cutting tool according to the prior art is produced in the following manner: grooves are placed in the mold on a base plate, usually by means of a laser, which is to have the cut-out or punched-out workpiece later. It will continue in this base mounting holes or other mounting options for Punzierstatte, punch holes or the like attached when the finished product should have corresponding elements.
  • the cutting lines or cutting knives - in the following, for reasons of better readability spoken only by cutting lines - attached.
  • an already ground and hardened starting metal strip is unwound from the roll and bent into the desired shape by means of suitable tools.
  • the starting metal strip may also be in rod form.
  • the pre-bent starting metal strip is pushed into the burned-in grooves of the base plate and connected to the base plate either by being pressed in or glued.
  • the cutting lines are usually made of a steel with a tough base body, which can withstand the bending stresses when bending in the form well, and a cutting area which is hardened in the tip region, to ensure increased wear resistance during punching.
  • the tip portion can be hardened only to a certain hardness, so that the cutting line can be reliably bent around the smallest intended radius of the desired shape. If this smallest intended radius is undershot, ie the cutting line bent more narrowly than intended, cracks or fractures may occur, especially in the hardened tip region of the cutting line.
  • the thus specified maximum usable hardness is thus significantly lower than would be possible from the hardening technology and the material. Therefore, the cutting tools thus produced wear out quite quickly and must be replaced was ⁇ .
  • the smallest possible bending radius is limited in order to prevent the tip region of the cutting line from tearing or breaking. As a result, no narrow radii or corners can be punched out of the starting material with the abovementioned cutting tools.
  • a workshop and insufficient approach to increase the hardening of the tip area is to place the finished cutting tool in a water bath, so that only the cutting area protrudes from the water upwards. Then the cutting area is heated by hand by means of an autogenous burner and quenched with water, so that it can come to a "hardening".
  • a rough workshop procedure often results in cracks or the punching tool warps. It is also very disadvantageous that - if at all - then sets a locally very uneven hardness and a very unevenly through-hardened tip area, which thus unevenly wears.
  • the control computers also convert or "translate" the desired geometry of the punching or cutting lines into corresponding machine commands for the automatic bending devices, the same applies to these cutting blades with respect to their problematic hardness properties and minimum bending radii and the risk of breakage or cracking
  • the invention can also be applied to the punching knives.
  • the step of bending the at least one cutting line is carried out by means of an NC-controlled bending means on the basis of geometric data.
  • the bends which later determine the contour of the component to be punched out, are introduced particularly quickly and precisely into the strip material. This is particularly advantageous for punching knives that do not require a geomet ⁇ riebeddedde base plate.
  • the method further comprises the step of inserting a groove into a base plate by means of a web-controlled engraving means on the basis of geometry data, the shape of the groove corresponding to the final shape of the cutting line. This will change the contour of the to be punched out component, especially quickly and accurately introduced into a base plate, which supports the cutting line, supports and prevents bending of the cutting line.
  • the method further comprises the step of inserting the cutting line into the groove in the base plate before the hardening step.
  • the curved cutting line is introduced into the likewise contour-determining groove of the baseplate and thus fastened to the baseplate and geometrically fixed.
  • the step of guiding the hardening agent is carried out by means of a sheet-guided guide means on the basis of geometry data.
  • the geometric data of the web-controlled guiding means for the step of guiding the hardening agent are preferably based on the geometric data of the web-controlled engraving means for the step of introducing the groove or the geometry data of the NC-controlled bending means.
  • the geometry data, which have already been used for the generation of the desired cutting contour can thus be reused for curing. This reduces the effort required for the controlled guiding of the hardener to minimal adjustments.
  • the web-controlled guide means and the web-controlled engraving means are preferably the same guide element.
  • the guide means can be used both for the production of the groove in the base plate and for guiding the hardener.
  • the curing agent is a CW laser, a CO 2 laser, an electron beam generator, an induction coil or a plasma generator.
  • the engraving agent is preferably a CW laser, a CCV laser or an end mill.
  • the engraving agent and the curing agent are the same CW laser or the same CO 2 laser.
  • the method further comprises the step of exchanging an engraving optics of the CW laser or the CO 2 laser by a hardening optics before the hardening step.
  • a hardening optics before the hardening step.
  • the cutting line preferably has a base body and a hardened tip region, which has a hardness which substantially corresponds to the maximum possible service hardness of the material used for the cutting line.
  • the cutting line preferably has a steel of the grade C60, the hardened tip region having a service hardness of more than 800 HV 0.5, preferably of more than 850 HV 0.5 and particularly preferably more than 900 HV 0.5.
  • the hardness of the tip region is far above the hardness of the cutting lines of the prior art.
  • even values of more than 900 HV 0.5 can be achieved, since the deterrence is particularly fast due to the small-area, practically punctiform heat source.
  • FIG. 1 shows a base plate of a cutting tool with an introduced groove.
  • FIG. 2 shows the base plate of FIG. 1 with a cutting line inserted into the groove
  • FIG 3 shows schematically the movement of a hardening agent during hardening of the inserted cutting line.
  • a groove 12 is milled or engraved in a base plate 10 by means of a web-controlled engraving means (not shown in FIG. 1).
  • the shape of the groove 12 corresponds to the desired cutting profile of the cutting or punching tool to be produced.
  • the base plate 10 is preferably a flat plate of wood, plastic or ei ⁇ nem wood material, such as pressboard, MDF or the like.
  • the Grund ⁇ plate could also be made of another suitable material or curved or bent for special punching or cutting tasks.
  • a web-controlled engraving agent is preferably used for engraving the groove 12 in the base plate 10.
  • a CW laser or a CO 2 laser but also a conventional end mill is suitable.
  • the power of the laser is adjusted so that a sufficient burn-in depth is achieved in the base plate 10, but it still has enough residual thickness.
  • the laser or milling cutter is located in a suitable laser or milling head, which is preferably moved NC-controlled via the base plate 10.
  • the NC control preferably controls an XYZ portal to which the laser or milling head is attached.
  • an industrial robot can be used for this purpose.
  • the NC control guides the laser or milling head to engrave the groove 12 on the basis of geometric data which are based on the geometry of the workpiece to be rejected.
  • a bent cutting line 20 sets Knet ⁇ and fixed, for example glued.
  • the cutting line 20 consisting of a band-shaped metal strip with a base body 22 and a pointed cutting area 24 (see Fig. 3).
  • the cutting line 20 is bent in its uncured state, so that particularly small bending radii are possible without the risk of crack formation.
  • a preferred material for the cutting line 20 is a grade C60 steel, but any other carbon steel or tool steel can be used, which can be bent well in the unhardened band-shaped state, and in the cured state has a service life sufficient for the stamping operation ⁇ points. If hardening without coolant is required, air-hardening steel grades are the material for cutting line 20.
  • FIG. 3 shows a detail of a part of the base plate 10 with an inserted cutting line 20.
  • a hardening agent 30 is guided along the curved and still uncured cutting line 20 so that it can act on the cutting area 24 and at least one Tip area of the cutting area 24 hardens.
  • the direction of movement of the hardening agent 30 is indicated by the arrow V.
  • the curing agent 30, like the engraving means for inserting the groove 12, may be a CW or CO 2 laser. Depending on the desired hardening method, however, it can also be an electron beam generator, an induction coil or a plasma generator. Other curing agents are conceivable, which can cause a heat input into the cutting area 24 of the cutting line.
  • the hardening agent 30 (in this case a laser head 30) is guided and optionally pivoted by means of an NC-controlled guiding means so that it exactly follows the cutting line 30 and hardens it in its tip region 26.
  • a laser beam 32 generated by the laser 30 preferably impinges directly on the tip of the cutting line 20.
  • this requires an offset "h" normal to the baseplate and possibly a twist which always controls the hardening agent normally to the respectively processed tip region 26 and thus in the direction of the curvature radius of the cutting line 20.
  • the other parameters of the hardening process such as processing speed, heat-up intensity, cooling rate, are integrated into the control algorithm for the hardening agent.
  • the hardened tip region 26 of the cutting line 20 has a service hardness of more than 800 HV 0.5 or preferably more than 850 HV 0.5 in the case of a steel of the grade C60.
  • a specially pulsed CW or CO 2 laser hardness values of up to 900 HV 0.5 or more can be achieved by the almost punctiform and thus locally very limited heat input.
  • the hardening agent 30 may preferably be the same as that used for the engraving process.
  • the laser used for example, can also be used for curing. If necessary, only the operating parameters need to be adjusted. It is also possible to swing optics into the beam path of the laser. Thus, for example, the optics for engraving the groove 12 could be replaced by a special hardening optics.
  • the quenching medium can either be integrated in the hardness head, or a second processing head can be guided at a corresponding distance from the first head, which serves for quenching.
  • control data required for NC or web control can be automatically calculated from the geometry data already available for the groove by the engraving process.
  • Another form of cutting tools 1 of the type mentioned also uses cutting lines 20 and punching blades, which are not mounted on a flat base plate 10, but on a circular cylindrical drum or roller. The material to be cut is then pulled through between this roller and a counter-roller and is cut or embossed at designated locations.
  • the present invention is, of course, also applicable to this type of tool.
  • the production of the grooves 12 on the drum or roller is preferably carried out by means of a device which is controlled by an NC program, so that a hardening agent can likewise be guided along the cutting line by appropriate adaptation of the NC program , In this case - if available - the data for producing the grooves 12 can be used.
  • Another advantage of the invention is that not only the cutting lines, but also all the other in-mold tools such as puncturing pens, punches, perforating lines / perforating knives, combination lines / combination knives and the like, can also be selectively cured. In this way, these elements are brought to the same level of hardness as the tip portion 26 of the cutting line 20, whereby the life and the set-up times of the cutting or punching tools 1 optimized and thus the corresponding costs are minimized.
  • punching or cutting tool 10 base plate 12 groove 20 cutting line 22 base body 24 cutting area 26 hardened tip area 30 hardening agent or laser 32 laser beam

Abstract

L'invention concerne un procédé servant à produire un outil de découpage ou d'estampage (1) et comprenant les étapes suivantes dans l'ordre indiqué : (a) pliage d'au moins une ligne de coupe (20) en sa forme définitive désirée et (b) guidage à commande continue d'un durcissant (30) le long de la forme définitive de la ligne de coupe (20), une zone de pointe (26) de la ligne de coupe (20) étant durcie de manière sélective. L'invention concerne également des outils de découpage ou d'estampage (1) ou des lignes de coupe (20) qui sont produits selon ce procédé.
PCT/EP2005/006986 2004-06-29 2005-06-29 Outils de decoupage ou lames d'estampage presentant des lignes de coupe WO2006000460A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004031421.7 2004-06-29
DE200410031421 DE102004031421A1 (de) 2004-06-29 2004-06-29 Schneidlinien aufweisende Schneidwerkzeuge bzw. Stanzmesser

Publications (1)

Publication Number Publication Date
WO2006000460A1 true WO2006000460A1 (fr) 2006-01-05

Family

ID=34979254

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/006986 WO2006000460A1 (fr) 2004-06-29 2005-06-29 Outils de decoupage ou lames d'estampage presentant des lignes de coupe

Country Status (2)

Country Link
DE (1) DE102004031421A1 (fr)
WO (1) WO2006000460A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581604A (en) * 1965-06-14 1971-06-01 Sandvik Steel Of Colorado Inc Cutting strips, cutting die knives, cutting rules and the like
US3866491A (en) * 1972-09-15 1975-02-18 Boehler & Co Ag Geb Stamping knife
US4562754A (en) * 1982-03-04 1986-01-07 Usm Corporation Methods for constructing cutting tools
EP0327530A2 (fr) * 1988-02-03 1989-08-09 BÖHLER Gesellschaft m.b.H. Couteau à ruban pour façonner des feuilles
EP0780199A1 (fr) * 1995-12-19 1997-06-25 Katayama Steel Rule Die, Inc. Plaque et outil de découpage pour une machine de découpe aux filets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581604A (en) * 1965-06-14 1971-06-01 Sandvik Steel Of Colorado Inc Cutting strips, cutting die knives, cutting rules and the like
US3866491A (en) * 1972-09-15 1975-02-18 Boehler & Co Ag Geb Stamping knife
US4562754A (en) * 1982-03-04 1986-01-07 Usm Corporation Methods for constructing cutting tools
EP0327530A2 (fr) * 1988-02-03 1989-08-09 BÖHLER Gesellschaft m.b.H. Couteau à ruban pour façonner des feuilles
EP0780199A1 (fr) * 1995-12-19 1997-06-25 Katayama Steel Rule Die, Inc. Plaque et outil de découpage pour une machine de découpe aux filets

Also Published As

Publication number Publication date
DE102004031421A1 (de) 2006-02-16

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