EP1406752B1 - Dispositif de blocage pour plaquette d'outil de poin onnage - Google Patents

Dispositif de blocage pour plaquette d'outil de poin onnage Download PDF

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Publication number
EP1406752B1
EP1406752B1 EP01999465A EP01999465A EP1406752B1 EP 1406752 B1 EP1406752 B1 EP 1406752B1 EP 01999465 A EP01999465 A EP 01999465A EP 01999465 A EP01999465 A EP 01999465A EP 1406752 B1 EP1406752 B1 EP 1406752B1
Authority
EP
European Patent Office
Prior art keywords
tool insert
holder
holding arrangement
ball
opening
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.)
Expired - Lifetime
Application number
EP01999465A
Other languages
German (de)
English (en)
Other versions
EP1406752A4 (fr
EP1406752A1 (fr
Inventor
Martin Mingebach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mate Precision Technologies Inc
Original Assignee
Mate Precision Tooling Inc
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 Mate Precision Tooling Inc filed Critical Mate Precision Tooling Inc
Publication of EP1406752A1 publication Critical patent/EP1406752A1/fr
Publication of EP1406752A4 publication Critical patent/EP1406752A4/fr
Application granted granted Critical
Publication of EP1406752B1 publication Critical patent/EP1406752B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026—Mounting of dies, platens or press rams
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2614—Means for mounting the cutting member

Definitions

  • the invention relates to a holding arrangement for securing a punching tool insert in a recess opening of a holder with the aid of a ball, the ball being movably held in a conduit that extends obliquely to the recess opening and which opens into the recess opening, the width of the conduit opening at the recess opening being less than the ball diameter, and in the locked position the ball rests, under the influence of a compression spring, in an indentation in an outer face of the punching tool insert.
  • one such holding arrangement is known by the name "ball-lock” and is used among other purposes in punching/embossing machines for large-scale mass production with a fixed tool arrangement.
  • the known holding arrangements have the purpose of enabling rapid replacement of the tool insert, if the wear limit is reached or in the event of failure, without having to remove the holder from the machine.
  • the spring is defected inward as a unit over a plurality of thread courses mounted on the conduit wall. This makes it difficult to adapt the holding arrangement to other holders with a lesser depth, since a certain minimum spring trave! must be available in order, on the one hand to provide secure locking of the tool insert and on the other hand to push the ball back to a position that completely uncovers the tool insert so that it can be removed.
  • the spring travel be lengthened by increasing the inclination of the conduit relative to the recess opening, because then the self-locking action for securing the punching tool insert may under some circumstances no longer exist.
  • the spring need not be compressed over a certain length as a unit and secured to the conduit wall, so that compared to the known variants, considerable spring travel gains are achieved, which make it possible to use the holding arrangement in thinner holders.
  • An object of the present invention is to omit remachining.
  • this object is attained by a holding arrangement, in which the holding element is embodied as a key which is seated in a groove in the holder and with which the holder can be fixed in a defined way in the correct angular position in the receptacle of a punching machine.
  • a key is provided on the top side of a calibration ring.
  • this key is given the further function of forming an abutment for the compression spring.
  • the groove for the key and the conduit for guiding the ball are fabricated in a vise, so that with the aid of the key and the holding arrangement of the invention, a defined angular position of the tool insert relative to the receptacle for the holder in the machine tool simultaneously exists without further action being taken.
  • the calibration ring is thicker than in normal holders, and the projection distance of the punching tool out of the holder is correspondingly less.
  • the holding arrangement of the present invention allows the use of disposable tools in a re-usable holder, so that a considerable reduction in cost can be achieved compared to the holders previously made in one-piece with the punching tool, and remachining of the punching tool insert can be omitted.
  • the punching tool insert is preferably provided with a coating that increases its service life, such as TiN. In the punching tool insert in the form of a disposable element, the coating can develop its full effect, since while a coating is also possible in the known holders, the requisite regrinding of the tool means that the optimal effect is achieved only in new tools.
  • the shaft end of the punching tool insert behind the indentation which for instance is a convex elongated rounded indentation, is shortened.
  • the reduction in the length of the shaft end is available especially in very thin holders, in order to enable an introduction of force into the holder from the end face of the punching tool insert. By comparison, if recess openings are too deep, excessive weakening of the remaining material could occur.
  • the indentation is adjoined by a groove which extends as far as the end of the shaft and is shallower and narrower than the indentation.
  • This groove can make it possible to remove the tool insert from the recess opening even if the ball cannot be pushed all the way back into the conduit, for instance because it was not possible to achieve an adequate length of spring travel. It is understood that the groove must be embodied as correspondingly shallow and narrow, so that the hold of the tool insert in the holder to prevent it from falling out is assured under all circumstances, even under the tensile forces that occur in operation.
  • openings or bores for instance parallel or vertical to the recess opening, can be provided, through which bore a pin or the like can be introduced to press the ball back, counter to the force of the compression spring, into a position that uncovers the punching tool insert.
  • an oblong slot is preferred, so that with the pin, using leverage, the ball can be moved into its unlocked position.
  • a further advantageous provision for making the process of disassembling the punching tool insert easier can be that the holder has a through bore which opens into the recess opening approximately centrally in the end face. By introducing an expulsion tool into this through bore, even solidly fixed punching tool inserts can easily be removed from the recess opening once the ball has been released.
  • Fig. 1 is a cross sectional view through a holder without a punching tool insert
  • Fig. 2 is a side view of the holder of Fig. 1 ;
  • Fig. 3 shows a detail of the tool of Fig. 2 ;
  • Fig. 4 is a side elevational view of a punching tool insert
  • Fig. 5 is a partial cross-sectional view taken along line 5-5 of Fig. 4 ;
  • Fig. 6 is a cross sectional view through a device for expelling a punching tool insert from the holder of Fig. 1 .
  • Fig. 1 shows a holder 10 for a punching tool insert (an example of which is shown in Figs. 4 and 5 ), which, as in the Trumpf system comprises a suitable shaft 14 and a calibration ring 16 so that it can be received in a punching machine.
  • the calibration ring 16 which as will be described in further detail hereinafter, is thicker, compared to the usual tools of the Trumpf system wherein the holder and the tool insert are made in one piece.
  • the calibration ring 16 is provided with a recess opening 18, into which the punching tool insert can be introduced with the end face of the tool insert resting on a bearing face 20 to transmit the punching forces to the holder.
  • a key 22 is secured in a groove 24 on the top of the calibration ring with the aid of a screw 26, which fixes the angular position of the holder 10 in the punching machine.
  • the inner end of the key covers an upper opening of a conduit 28, which is inclined at an angle ⁇ , which may be about 15°, in the calibration ring 16, such that this conduit opens at 30 into the recess opening 18.
  • the width of the opening 30 into the recess opening 18 is less than the full width of the conduit 28.
  • a ball 32 movably guided in the conduit 28 is prevented from falling out into the recess opening 18.
  • the ball 32 is urged into the position shown in Fig. 1 by a prestressed compression spring disposed in the conduit 28. In this position, the ball 32 protrudes with part of its circumference into the recess opening 18.
  • the key 22 forms the abutment for the compression spring, which may be a helical spring, as shown at 42.
  • the ball 32 rests in an elongated rounded convex indentation in the surface of the tool insert. In conjunction with an inclination ⁇ of about 19 in the wall of the indentation, a self-locking effect ensues, which prevents the tool insert from falling out of the recess opening 18, even under the tensile forces occurring in operation.
  • the ball 32 assures angular alignment of the punching tool insert, so that in conjunction with the key 22, a defined position of the tool insert relative to the receptacle of the punching machine is obtained.
  • the groove 24 for retaining the key 22 in the calibration ring 16 and the conduit 28 for receiving the ball 32 to be held in a vise.
  • a suitable tool insert 43 is shown in Figs. 4 and 5 .
  • This tool insert 43 is relatively short in length, for reasons described above. It includes a shaft 44 and an end face 45 which abuts bearing face 20 of recess opening 18.
  • An indentation 46 for receiving the ball 32 in the locked position is curved in cross section and its walls extend downwardly at an angle ⁇ to the vertical of approximately 11°.
  • An 11 angle of indentation 46, coupled with the 15° inclination of conduit 28 assures locking of the ball 32 in indentation 46.
  • the tool insert includes a tapered portion 47 in the form of a conical guide extending downwardly from the shaft end 45. This conical guide 47 joins with indentation 46 at transition point 48 which, lying essentially on the circumference of shaft 44, can be felt as the shaft is pushed in and the ball 32 rides over it and snaps into its locking position in indentation 46.
  • a through bore 34 in the shaft 14 of the holder 10 optionally allows the introduction of an expulsion pin, for forcing out a tool insert that has become jammed. (See Fig. 6 .)
  • a first opening, aligned parallel with the recess opening 18, is provided in the form of a bore 36, through which a pin can be introduced to force the ball 32 back up the conduit 28.
  • a further, second opening 38 is provided, disposed transversely to the recess opening 18 and the bore 36.
  • This second opening is in the form of an oblong slot 38, the width of which is narrower than the diameter of the ball 32, so as not to hinder the motion of the ball 32 in the conduit 28.
  • the punching tool insert used with the present invention has a shorter shaft than the inserts used in comparable, previously known holding arrangements. This is because otherwise, i.e., if the shaft were longer, the transitional region between the shaft 14 and the calibration ring 16 would be weakened too much to allow the forces occurring in punching to be reliably transferred to the punching machine.
  • the projection distance of the punching tool insert out of the recess opening 18 is reduced to the extent by which the calibration ring 16 is made thicker. Since the punching tool insert is intended as a disposable tool without regrinding, this reduced length is not significant.
  • Fig. 6 shows the removal of the punching tool insert from the holder 10 with the aid of a changing device 50.
  • the changing device 50 has a receptacle 52, which in terms of geometry is made similar to the receptacle of a punching machine, with a resilient locking bolt element 54 that engages the recess 55 provided in the shaft 14 of the holder 10 to fix the holder 10 on the device 50.
  • a lever 56 of the changing device 50 acts on a linearly guided expulsion element 58, which has a pin 60 that protrudes through the through bore 34 as far as the inside of the recess opening 18 and that by actuation of the lever 56 can expel the punching tool insert.
  • the pin 40 it is necessary for the pin 40 to be introduced through the oblong slot 38, and by pivoting about the pivot point described above for the ball 32 to be moved into its retracted position, in which the punching tool insert is removable.
  • the pin 40 it is also possible to introduce the pin 40 through the opening 36 from the underside of the calibration ring 16, in order to unlock the ball 32 before the tool insert is forced out of the recess opening 18 with the aid of the lever 56.
  • the introduction of a new tool insert is done by simply pressing it in.
  • the tool insert first forces the ball 32 backward until the ball can snap into the indentation provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Gripping On Spindles (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Claims (10)

  1. Dispositif de blocage pour fixer un insert d'outil (43) à un porte-outil (10) à l'aide d'une bille (32) retenue mobile dans un conduit (28) oblique par rapport à la cavité (18) du porte-outil (10) et cette conduite (28) débouche dans la cavité (18), la largeur de l'ouverture (30) de la conduite en direction de la cavité (18) étant inférieure au diamètre de la bille, et en position verrouillée, la bille (32) s'appuie sous l'action d'un ressort de compression (42) dans un creux (46) de la surface extérieure de l'insert d'outil (43), l'ouverture supérieure de la conduite (28) du porte-outil (10) étant couverte par un élément de maintien qui constitue une butée pour le ressort de compression (42),
    caractérisé en ce que
    l'élément de support est une clef (22) logée dans une rainure (24) du porte-outil (10) et permettant au porte-outil (10) d'être fixé dans une position angulaire définie dans un réceptacle de la machine de poinçonnement.
  2. Dispositif de blocage selon la revendication 1,
    caractérisé en ce que
    le creux (46) est de forme allongée, arrondie et convexe et l'extrémité de la tige de l'insert d'outil (43) au-dessus du creux (46) est raccourcie.
  3. Dispositif de blocage selon la revendication 1,
    caractérisé en ce que
    le creux (46) se poursuit par une rainure qui s'étend jusqu'à l'extrémité de la tige et est moins profonde et plus étroite que le creux.
  4. Dispositif de blocage selon la revendication 1, comprenant un perçage (34) pratiquement parallèle à la cavité (18) pour libérer l'insert d'outil (43) à l'aide d'une broche (60) que l'on place dans le perçage (34) pour repousser la bille (32) contre la force du ressort de compression (42) dans une position de déblocage de l'insert d'outil (43).
  5. Dispositif de blocage selon la revendication 1, comprenant un orifice de déblocage s'étendant pratiquement perpendiculairement à la cavité (18) et permettant d'introduire une broche (60) dans le perçage (34) pour repousser la bille (32) contre la force développée par le ressort de compression (42) dans une position de libération de l'insert d'outil de poinçonnage (43).
  6. Dispositif de blocage selon la revendication 5,
    dans lequel
    l'orifice de déblocage a la forme d'une fente oblongue (38) et la largeur de cette ouverture est inférieure au diamètre de la bille.
  7. Dispositif de blocage selon la revendication 1,
    caractérisé en ce que
    le support a un perçage traversant (34) qui débouche dans la cavité (18) sensiblement au centre de la face d'extrémité (45) de l'insert d'outil (43).
  8. Dispositif de blocage selon la revendication 1,
    caractérisé en ce que
    le porte-outil a une bague de calibrage comprenant la conduite et l'épaisseur de la bague de calibrage est augmentée et la partie en saillie de l'outil de poinçonnement en dehors du porte-outil est réduite dans la même mesure.
  9. Dispositif de blocage selon la revendication 1,
    dans lequel
    l'insert d'outil est muni d'un revêtement augmentant sa durée de vie.
  10. Dispositif de blocage selon la revendication 9,
    dans laquelle
    le revêtement est TiN.
EP01999465A 2000-12-04 2001-12-03 Dispositif de blocage pour plaquette d'outil de poin onnage Expired - Lifetime EP1406752B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10060339.4A DE10060339B4 (de) 2000-12-04 2000-12-04 Haltevorrichtung für Stanzwerkzeugeinsatz
DE10060339 2000-12-04
PCT/US2001/045102 WO2002045924A1 (fr) 2000-12-04 2001-12-03 Dispositif de blocage pour plaquette d"outil de poinçonnage

Publications (3)

Publication Number Publication Date
EP1406752A1 EP1406752A1 (fr) 2004-04-14
EP1406752A4 EP1406752A4 (fr) 2006-12-27
EP1406752B1 true EP1406752B1 (fr) 2009-02-25

Family

ID=7665812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01999465A Expired - Lifetime EP1406752B1 (fr) 2000-12-04 2001-12-03 Dispositif de blocage pour plaquette d'outil de poin onnage

Country Status (4)

Country Link
EP (1) EP1406752B1 (fr)
AU (1) AU2002219995A1 (fr)
DE (1) DE10060339B4 (fr)
WO (1) WO2002045924A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8997617B2 (en) 2012-03-14 2015-04-07 Mate Precision Tooling, Inc. Punch assembly with quick attach punch point and stripper plate removably secure thereon
US9186717B2 (en) 2012-10-19 2015-11-17 Mate Precision Tooling, Inc. Punch assembly with separate adjustable punch guiding shim block

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7014182B2 (en) 1999-04-29 2006-03-21 Marsh Jeffrey D Apparatus and method of on demand printing, binding, and trimming a perfect bound book
DE10255219B3 (de) * 2002-11-27 2004-03-18 Mate Precision Tooling Gmbh Stanzwerkzeug mit Justierring
DE202004019977U1 (de) * 2004-12-27 2006-05-04 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Stempelaufnahme
US10265756B2 (en) 2012-02-06 2019-04-23 Mate Precision Tooling, Inc. Punch assembly with steel punch point insert removably secured therein

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3245694A (en) * 1964-08-24 1966-04-12 James E Parker Removable ball retainer block
US4558620A (en) * 1984-10-05 1985-12-17 Wallis Bernard J Punch retainer
US5357835A (en) * 1992-07-29 1994-10-25 Moellering David J Ball lock punch retainer
US5839183A (en) * 1996-09-23 1998-11-24 Porter Precision Products Co. Punch retainer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8997617B2 (en) 2012-03-14 2015-04-07 Mate Precision Tooling, Inc. Punch assembly with quick attach punch point and stripper plate removably secure thereon
US9186717B2 (en) 2012-10-19 2015-11-17 Mate Precision Tooling, Inc. Punch assembly with separate adjustable punch guiding shim block

Also Published As

Publication number Publication date
EP1406752A4 (fr) 2006-12-27
WO2002045924A1 (fr) 2002-06-13
AU2002219995A1 (en) 2002-06-18
DE10060339A1 (de) 2002-06-13
EP1406752A1 (fr) 2004-04-14
WO2002045924A9 (fr) 2002-12-19
DE10060339B4 (de) 2016-11-24

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