US3871254A - Means for piercing and stripping thick material - Google Patents

Means for piercing and stripping thick material Download PDF

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Publication number
US3871254A
US3871254A US350789A US35078973A US3871254A US 3871254 A US3871254 A US 3871254A US 350789 A US350789 A US 350789A US 35078973 A US35078973 A US 35078973A US 3871254 A US3871254 A US 3871254A
Authority
US
United States
Prior art keywords
punch
stripper
retainer
head
annular
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
US350789A
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English (en)
Inventor
Jr Lawrence V Whistler
Iii Lawrence V Whistler
Harold J Whistler
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US350789A priority Critical patent/US3871254A/en
Priority to JP48082500A priority patent/JPS49130586A/ja
Priority to BR6535/73A priority patent/BR7306535D0/pt
Priority to DE19732345513 priority patent/DE2345513A1/de
Application granted granted Critical
Publication of US3871254A publication Critical patent/US3871254A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/003—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
    • B21D45/006—Stripping-off devices
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2096—Means to move product out of contact with tool
    • Y10T83/2135—Moving stripper timed with tool stroke
    • Y10T83/215—Carried by moving tool element or its support
    • Y10T83/2155—Stripper biased against product
    • Y10T83/2157—Elastomeric stripper contacting product
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2092—Means to move, guide, or permit free fall or flight of product
    • Y10T83/2096—Means to move product out of contact with tool
    • Y10T83/2135—Moving stripper timed with tool stroke
    • Y10T83/215—Carried by moving tool element or its support
    • Y10T83/2155—Stripper biased against product
    • Y10T83/2159—By spring means

Definitions

  • the stripper for stripping the pierced material from the punch is engaged between the punch retaining means and the pierced material; and accordingly, there is a tendency for the stripper to pull the punch from the punch retaining means when the pierced material is stripped from the punch.
  • the stripping means is engaged between the workpiece or material to be pierced and a head or shoulder means on the punch, so that as the punch passes through the workpiece, the shock load resulting from the bursting or explosive effect obtained as the punch breaks through the workpiece is absorbed by the stripping means and is not transmitted to the means retaining the punch to the punch shoe or punch retainer. Further, when the stripping means strips the pierced workpiece from the punch, the stripping force is transferred completely to the punch and not to the punch retaining means; and accordingly, there is no tendency for the stripper to pull the punch from the punch retaining means as in conventional devices. I
  • the stripper means may comprise an elastomer material such as rubber or polyurethane or the like, or a spring means, but it has been found that polyurethane works exceptionally well and is superior to rubber or the like.
  • FIG. 1 is a sectional view in elevation of a first form of the invention shown in position immediately prior to engagement with a workpiece.
  • FIG. 2 is a view similar to FIG. 1 showing the punch pushed through the workpiece and with the stripper means in compressed condition.
  • FIG. 3 is a view in section taken along line 33 of FIG. 2.
  • FIG. 4 is an exploded perspective view of the punch and stripper means of the present invention.
  • FIG. 7 is a view similar to FIG. 6 with the punch pushed through the workpiece.
  • FIG. 8 is a' view in section taken along line 8-8 in FIG. 6, and
  • FIG. 9 is a plan view of the snap ring against which the stripper means of FIGS. 6 and 7 abuts.
  • a punch and stripper means are indicated generally at 10 and comprise a punch shoe 11 to which a punch retainer 12 is suitably'secured in a conventional manner.
  • the punch retainer has a socket 13 therein defining an axially, downwardly presented shoulder or surface 14.
  • An elongate solid punch 15 having a body portion 16, a diametrically enlarged head portion 17 and a reduced diameter, elongated piercing point or punch point 18 thereon is secured to the punch retainer at the head 17 thereof with the head received in the recess 13 and against the surface 14.
  • the punch is secured in the recess by means of a set screw or plurality of set screws 19 extended at an angle through the punch retainer and into engagement with the outer surface of the head portion 17 of the punch 15.
  • a shallow, concave annular groove 20 is in the punch between the body portion 16 and head portion 17 thereof and defines an annular, axially downwardly presented shoulder 20'.
  • An elongate, cylindrical, elas tomer stripper 21 of a suitable material such as rubber, polyurethane, or thelike, is fitted over the body portion 16 and in its normal, expanded condition, extends the length of the body portion 16 and punch point 18.
  • the stripper 21 has a lower annular cap 22 of a suitable rigid material such as fiber or steel or the like, the cap 22 having an annular upstanding rim or flange 23 thereon with a radially inwardly directed rib or lip 24 engaged against the lower outer surface of the stripper 21 to maintain the cap 22 in position.
  • a similar cap or cap means 25 is similarly secured to the upper end of stripper 21 and the stripper is secured to the punch by means of a set screw or plurality of set screws 26 extended radially through the upper cap 25 into engagement with the annular groove 20 in the punch. The upper inner marginal portion of upper cap 25 is engaged against the shoulder 20' on the underside of head 17 on the punch 15.
  • a workpiece W is supported immediately beneath the punch and stripper in a conventional manner and on top of a die bushing 27 which is held to a die retainer (not shown) in a conventional manner, the die retainer in turn being supported on a die shoe (not shown) in a conventional manner.
  • the punch 15 has been pushed through the workpiece, and a slug S of the workpiece is separated from the workpiece and is falling away I therefrom.
  • the sudden release of the load on the punch as the punch breaks or bursts through the workpiece and the explosive effect thus produced are absorbed by the stripper, which is in compressed condition at this stage of operation and acts in the nature of a shock absorber.
  • the set screws 19 which retain the punch 15 to the punch retainer 12 are protected; and they are not sheared as frequently occurs in conventional punch and stripper means when a heavy workpiece is pierced, and wherein the stripping load is imposed on the lower face of the punch retainer;
  • FIGS. 5 and 5a a slightly modified form of the invention is illustrated, wherein rather than the set screws 19, a ball lock mechanism 28 is utilized to secure the punch in position relative to the punch retainer 12.
  • the ball lock 28 includes an inclined cavity or bore 29 in the punch retaining means 12 in which is fitted a ball 30 and coil spring 31 for urging the ball downwardly in the bore 29.
  • a shallowdepression of substantially tear drop shape 32 is in the outer side surface of the head 17 of punch 15' and the ball 30 is engaged in this depression 32 to securely lock the punch in retainer 12.
  • the upper end of the head 17 of the punch 15' is engaged against a back up plate supported on the punch shoe in a conventional manner.
  • this form of the invention is identical to the form of the invention illustrated and described with reference to FIGS. 1 through 4.
  • a further modified punch and stripper means 10" comprises an elongate solid punch 34 having a body portion 16' and a reduced diameter punch end or piercing point 18 and an annular channel or groove 35 adjacent an upper end portion of the body portion 16'.
  • An annular channel or groove 36 is in the punch at the upper end of the body portion and defines an axially, downwardly facing shoulder 37.
  • the punch 34 has a head portion 38 of substantially the same diameter as the body portion 16', with the head 38 secured in punch retainer 12 by means of a ball lock 30, 3l, 32 as in the previously described embodiment, and with the upper end of the head 38 engaged against the underside of the back up plate 33 suitably secured to the punch shoe 11.
  • a snap ring 39 is fitted within the channel 36 between the body portion 16 and head 38 of punch 34, in spaced relation to the punch retaining means 12, and a modified stripper means 40 is operatively connected with the punch 34 and is engaged against the underside of snap ring 39.
  • the modified stripper means 40 includes an annular collar or cap means 41 secured to the upper end portion of the body portion 16 by means-of a plurality of radially extending set screws 19 extended through the collar 41 and into the groove 35 in the body portion 16 of the punch 34.
  • a plurality of spaced apart bores 42 extend from the upper surface of the collar 41 toward the lower surface thereof and a plurality of guide pins 43 are slidably positioned in the bores 42, and each has an enlarged head 44 thereon which engages against the bottom of the bore 42 of collar 41.
  • the guide pins 43 have threaded lower ends 45 threadably engaged in spaced apart threaded bores in a'workpiece engaging annular plate or collar 46.
  • a coil spring 47 surrounds each guide pin 43 and is engaged at its lower end with the upper surface of the plate 46 and is engaged at its upper end with the undersurface of collar 41 forurging the plate 4 downwardly relative to the punch 34.
  • the workpiece W is supported in a conventional manner on top of a die bushing 27 which is in turn supported in a die retainer 48 which is suitably supported in a conventional manner on a die shoe 49.
  • the punch is shown in position about to engage the workpiece W with the springs 47 in expanded condition and the plate or collar 46 engaged with the workpiece.
  • the punch point 18 has pierced the workpiece W and a slug S of the workpiece W is removed therefrom.
  • the springs 47 are in compressed condition with the enlarged head 44 of the guide pins 43 positioned adjacent the upper end of the bores 42 in collar 41. All of the load transmitted from plate 46 to the springs 47 is transmitted through the collar 41 to the snap ring 39 and shoulder 37 on the punch 34 to thus protect the ball lock 30, 3'1, 32.
  • the stripper 40 acts between the snap ring 39 and shoulder 37 and the workpiece W to strip the workpiece W from the punch.
  • the snap ring 39 has a radially extending channel or open portion 50 therein through which a suitable tool may be inserted to disengage ball 30 from depression 32 to release the punch from the punch retainer 12.
  • holes have been punched through inch thick steel, and a /8 inch diameter hole has been punched through a 1 inch thick piece of mild steel without danger of damaging or shearing the means, such as set screws orother suitable means, which hold the punch to the punch retainer.
  • the means securing the punch to the punch retainer would likely be damaged or destroyed if a piece of material of this size were punched or pierced, particularly where punches are utilized which are removably mounted to the punch retainer. 7
  • a punch for punching holes in material comprismg:
  • a punch having a head end and a piercing end
  • resiliently yieldable stripper means disposed in substantially coaxial relation with the punch, said stripper means including a cap means secured to the punch in coaxial relation therewith in engagement with said shoulder means and axially spaced from the punch retaining means, saidv yieldable stripper means engaged at one end against said cap means and having its other end substantially coplanar with the piercing end of the punch, so that when said punch is forced through a piece of material to pierce the material the stripper means engages between the piece of material and the cap means and thus acts as a shock absorber absorbing forces resulting from piercing the piece of material and effecting stripping of the pierced piece of material from the punch, with stripping loads imposed on the stripper means transmitted to the shoulder means on said punch to thus protect the punch securing means supporting said punch in said punch retaining means.
  • a punch for punching holes in material comprising:
  • resiliently yieldable stripper means disposed in substantially coaxially surrounding relation to the punch
  • stripper means comprises an elastomeric cylindrical stripper fitted over the punch and secured at its upper end to the punch adjacent the upper end of the punch.
  • said stripper means comprises coil spring means
  • said cap means including an annular collar secured to said punch adjacent an upper end portion thereof and an annular workpiece engaging plate adjacent the lower end of the punch, said coil spring means engaged between said annular collar and said annular workpiece engaging plate to urge the workpiece engaging plate downwardly relative to said punch.
  • annular groove is in said punch adjacent an upper end portion thereof and a plurality of set screws extend radially through said annular collar into engagement with said groove to maintain said collar and said coil spring means in position relative to said punch, an annular groove in said punch above said collar defining and axially downwardly facing shoulder, a snap ring received in said groove, and said annular collar engaged against an undersurface of said snap ring to transmit forces imposed on said coil spring means and collar to said snap ring and to said shoulder and punch.
  • a punch as in claim 8 wherein a plurality of circumferentially spaced axial bores extend through said collar, a guide pin slidably received in each of said bores in said annular collar at one end thereof and threadably engaged with said annular workpiece engaging plate at the other end thereof, and a coil spring disposed about each said guide pin and engaged at its opposite ends with the annular collar and workpiece engaging plates, respectively, said punch having a head portion above said snap ring, said head portion having substantially the same diameter as said punch and secured in said punch retaining means by a ball lock
  • a ball lock Disclaimer 3,87l,254.-Lawrence V. Whistler, Jr., and Lawrence V. Whistler, III, Kenmore; and Harold J. Whistler, Williamsville, NY. MEANS FOR PIERCING AND STRIPPING THICK MATERIAL. Patent dated Mar. 18, 1975. Disclaimer filed Jan. 19, 1981, by the inventors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Punching Or Piercing (AREA)
US350789A 1973-04-13 1973-04-13 Means for piercing and stripping thick material Expired - Lifetime US3871254A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US350789A US3871254A (en) 1973-04-13 1973-04-13 Means for piercing and stripping thick material
JP48082500A JPS49130586A (en, 2012) 1973-04-13 1973-07-21
BR6535/73A BR7306535D0 (pt) 1973-04-13 1973-08-24 Puncao e conjunto de puncao e dispositivo removedor resiliente
DE19732345513 DE2345513A1 (de) 1973-04-13 1973-09-08 Lochstanzvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US350789A US3871254A (en) 1973-04-13 1973-04-13 Means for piercing and stripping thick material

Publications (1)

Publication Number Publication Date
US3871254A true US3871254A (en) 1975-03-18

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US350789A Expired - Lifetime US3871254A (en) 1973-04-13 1973-04-13 Means for piercing and stripping thick material

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US (1) US3871254A (en, 2012)
JP (1) JPS49130586A (en, 2012)
BR (1) BR7306535D0 (en, 2012)
DE (1) DE2345513A1 (en, 2012)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048889A (en) * 1975-07-07 1977-09-20 Finley George C Elastomeric stripper having metal head and stripping plates
US4104941A (en) * 1976-09-21 1978-08-08 S. B. Whistler & Sons, Inc. Assembly for enabling close tolerance punching with a reusable system
US4248111A (en) * 1979-07-16 1981-02-03 Wilson Tool Company Punch guide assembly
US4667411A (en) * 1985-09-09 1987-05-26 Mccallum Orval C Hand-held powered gasket punch
US4843931A (en) * 1987-09-01 1989-07-04 S.B. Whistler & Sons, Inc. Punch and die system
US5138919A (en) * 1990-12-13 1992-08-18 Wilhelm Arthur L Magnetic holder for punch stripper
US5359914A (en) * 1993-06-29 1994-11-01 Brown Richard H Two part urethane punch stripper
US5471901A (en) * 1992-10-09 1995-12-05 Fuji Jukogyo Kabushiki Kaisha Press die
ES2085193A2 (es) * 1992-07-13 1996-05-16 Arthur L Wilhelm Dispositivo sujetador magnetico para un extractor de punzones perforadores.
US5647256A (en) * 1995-02-20 1997-07-15 Mate Precision Tooling Inc. Punch unit including an adjustable punch
US5832798A (en) * 1994-08-10 1998-11-10 Mate Precision Tooling Inc. Punch unit
US5839341A (en) * 1996-04-12 1998-11-24 Mate Precision Tooling Punch unit
EP1050350A1 (en) * 1999-05-04 2000-11-08 Euromac S.r.l. Universal puncher holder adaptor for punching machines
US6196103B1 (en) 1998-08-17 2001-03-06 Mate Precision Tooling Inc. Punch guide assembly
US6381822B1 (en) * 1998-06-15 2002-05-07 Nsk-Warner K.K. Method and apparatus for manufacturing friction plate
US6688198B2 (en) * 2000-11-02 2004-02-10 Dai Nippon Printing Co., Ltd. Apparatus for cutting a sheet-shaped material
US20040112188A1 (en) * 2002-12-17 2004-06-17 Masatoshi Oishi Method for press punching a hole in sheet metal and press die
US20060071062A1 (en) * 2002-07-25 2006-04-06 Harald Weigelt Stripping device
WO2007018695A3 (en) * 2005-08-08 2007-10-18 David J Moellering Stripper unit for a punch retainer
US7707919B1 (en) * 2005-03-21 2010-05-04 Moeller Manufacturing Company, Inc. One-piece stripper retainer for a punch
US20110094358A1 (en) * 2008-06-18 2011-04-28 Aramizu Teruo Punch for punching sheet metal, sheet metal punching apparatus having the punch, and method therefor
CN103752719A (zh) * 2014-01-06 2014-04-30 河南天海电器有限公司 汽车端子高速精密冲压模具中的弹性卸料装置
US20170320120A1 (en) * 2016-05-05 2017-11-09 Swanstrom Tools Usa Inc. Punch and die holding apparatus and method
IT201700021199A1 (it) * 2017-02-24 2018-08-24 Armenio Scattolon Dispositivo perfezionato per stampaggio
US20180311854A1 (en) * 2017-04-27 2018-11-01 Pearl Technologies, Inc. Safety Cover for Lightning Punch

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58224029A (ja) * 1982-06-22 1983-12-26 Ogura Chuck Kk パンチヤ−
JPS60121415U (ja) * 1984-01-20 1985-08-16 トヨタ自動車株式会社 穴抜きポンチ
JPS61133225U (en, 2012) * 1985-02-08 1986-08-20
JPS61148424U (en, 2012) * 1985-03-05 1986-09-12
JPS6246144U (en, 2012) * 1985-09-09 1987-03-20
US4856393A (en) * 1985-11-22 1989-08-15 Braddon George B Method for die cutting plastic foam
JPS632522U (en, 2012) * 1986-06-18 1988-01-09
JPH06196Y2 (ja) * 1986-09-08 1994-01-05 マツダ株式会社 プレス金型のピアスパンチ
JPH01165119U (en, 2012) * 1988-04-30 1989-11-17

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US928256A (en) * 1907-11-29 1909-07-20 William H Grissom Die.
US3211035A (en) * 1963-08-20 1965-10-12 Sr Lawrence V Whistler Punch stripper apparatus
US3245694A (en) * 1964-08-24 1966-04-12 James E Parker Removable ball retainer block

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US928256A (en) * 1907-11-29 1909-07-20 William H Grissom Die.
US3211035A (en) * 1963-08-20 1965-10-12 Sr Lawrence V Whistler Punch stripper apparatus
US3245694A (en) * 1964-08-24 1966-04-12 James E Parker Removable ball retainer block

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048889A (en) * 1975-07-07 1977-09-20 Finley George C Elastomeric stripper having metal head and stripping plates
US4104941A (en) * 1976-09-21 1978-08-08 S. B. Whistler & Sons, Inc. Assembly for enabling close tolerance punching with a reusable system
US4248111A (en) * 1979-07-16 1981-02-03 Wilson Tool Company Punch guide assembly
US4667411A (en) * 1985-09-09 1987-05-26 Mccallum Orval C Hand-held powered gasket punch
US4843931A (en) * 1987-09-01 1989-07-04 S.B. Whistler & Sons, Inc. Punch and die system
US5138919A (en) * 1990-12-13 1992-08-18 Wilhelm Arthur L Magnetic holder for punch stripper
ES2085193A2 (es) * 1992-07-13 1996-05-16 Arthur L Wilhelm Dispositivo sujetador magnetico para un extractor de punzones perforadores.
US5471901A (en) * 1992-10-09 1995-12-05 Fuji Jukogyo Kabushiki Kaisha Press die
US5359914A (en) * 1993-06-29 1994-11-01 Brown Richard H Two part urethane punch stripper
US5832798A (en) * 1994-08-10 1998-11-10 Mate Precision Tooling Inc. Punch unit
US5647256A (en) * 1995-02-20 1997-07-15 Mate Precision Tooling Inc. Punch unit including an adjustable punch
US5839341A (en) * 1996-04-12 1998-11-24 Mate Precision Tooling Punch unit
US6381822B1 (en) * 1998-06-15 2002-05-07 Nsk-Warner K.K. Method and apparatus for manufacturing friction plate
US6196103B1 (en) 1998-08-17 2001-03-06 Mate Precision Tooling Inc. Punch guide assembly
EP1050350A1 (en) * 1999-05-04 2000-11-08 Euromac S.r.l. Universal puncher holder adaptor for punching machines
US6688198B2 (en) * 2000-11-02 2004-02-10 Dai Nippon Printing Co., Ltd. Apparatus for cutting a sheet-shaped material
US8225702B2 (en) 2002-07-25 2012-07-24 Harald Weigelt Stripping device
US20060071062A1 (en) * 2002-07-25 2006-04-06 Harald Weigelt Stripping device
US20110174127A1 (en) * 2002-12-17 2011-07-21 Ones Co., Ltd. Method for press punching a hole in sheet metal and press die
US8087333B2 (en) * 2002-12-17 2012-01-03 Ones Co., Ltd. Method for press punching a hole in sheet metal and press die
US20040112188A1 (en) * 2002-12-17 2004-06-17 Masatoshi Oishi Method for press punching a hole in sheet metal and press die
US7707919B1 (en) * 2005-03-21 2010-05-04 Moeller Manufacturing Company, Inc. One-piece stripper retainer for a punch
WO2007018695A3 (en) * 2005-08-08 2007-10-18 David J Moellering Stripper unit for a punch retainer
CN101374643B (zh) * 2005-08-08 2013-11-13 D·J·莫勒林 凸模固定件的脱模机组件
US20110094358A1 (en) * 2008-06-18 2011-04-28 Aramizu Teruo Punch for punching sheet metal, sheet metal punching apparatus having the punch, and method therefor
CN103752719A (zh) * 2014-01-06 2014-04-30 河南天海电器有限公司 汽车端子高速精密冲压模具中的弹性卸料装置
US20170320120A1 (en) * 2016-05-05 2017-11-09 Swanstrom Tools Usa Inc. Punch and die holding apparatus and method
US10596614B2 (en) * 2016-05-05 2020-03-24 Swanstrom Tools Usa Inc. Punch and die holding apparatus and method
IT201700021199A1 (it) * 2017-02-24 2018-08-24 Armenio Scattolon Dispositivo perfezionato per stampaggio
US20180311854A1 (en) * 2017-04-27 2018-11-01 Pearl Technologies, Inc. Safety Cover for Lightning Punch
US10179420B2 (en) * 2017-04-27 2019-01-15 Pearl Technologies Inc. Safety cover for lightning punch

Also Published As

Publication number Publication date
JPS49130586A (en, 2012) 1974-12-13
BR7306535D0 (pt) 1974-11-12
DE2345513A1 (de) 1974-10-31

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