US3289519A - Latch mechanism for die block of punch press - Google Patents

Latch mechanism for die block of punch press Download PDF

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Publication number
US3289519A
US3289519A US418018A US41801864A US3289519A US 3289519 A US3289519 A US 3289519A US 418018 A US418018 A US 418018A US 41801864 A US41801864 A US 41801864A US 3289519 A US3289519 A US 3289519A
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Prior art keywords
die
plunger
punch
socket
bolt
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US418018A
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Donato L Piccone
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    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/59—Manually releaseable latch type
    • Y10T403/591—Manually releaseable latch type having operating mechanism
    • Y10T403/592—Ball detent
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7041—Interfitted members including set screw
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/76—Joints and connections having a cam, wedge, or tapered portion
    • 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
    • Y10T83/929—Tool or tool with support
    • Y10T83/9411—Cutting couple type
    • Y10T83/9423—Punching tool
    • Y10T83/9425—Tool pair
    • 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
    • Y10T83/929—Tool or tool with support
    • Y10T83/9457—Joint or connection
    • Y10T83/9473—For rectilinearly reciprocating tool
    • Y10T83/9476—Tool is single element with continuous cutting edge [e.g., punch, etc.]

Definitions

  • a primary object of the invention is to provide a simple and inexpensive mechanism whereby a die coacting with a punch may be readily and firmly latched to or released from its retainer.
  • Another object is to provide a bolt for latching a die in a retainer by means of a plunger actuable in the die to establish and maintain the effective position of said bolt, coacting cam faces being formed on the plunger and bolt for eifecting such actuation.
  • Another object is to employ a metal ball as a latch bolt for either securing a die in its use position or releasing it to afford its ready removal.
  • FIG. 1 is a fragmentary vertical axial sectional view of my improved latch mechanism as applied to a punch press, the latching position of such mechanism being shown.
  • FIG. 2 is a similar sectional view of the latch mechanism, but showing its released position.
  • FIG. 3 is a vertical sectional detail of the latch mechanism, taken on the line 3--3 of FIG. 2.
  • FIG. 4 is a view similar to FIG. 1, but illustrates another embodiment of the invention.
  • FIG. 5 is an enlarged fragmentary vertical sectional detail of the modification appearing in FIG. 4, and shows a released position of the mechanism.
  • the reference character 1 designates the usual punch of a punch-press, said punch being vertically reciprocatory to and from a cylindrical die 2.
  • the die 2 Adjoining its top face, the die 2 is formed with a circular aperture 3 proportioned for shearing coaction with the punch.
  • a workpiece exemplified at 4 and usually of sheet-metal is disposed across the die for perforation by the punch.
  • the die is formed with a frustoconical passage 5, downwardly extended from the aperture 3 and opening in the bottom face of the die to accommodate disks 6 struck out of the work by a punching operation.
  • the die is proportioned to slide vertically with no material lateral motion in a cylindrical socket 7 formed in the die retainer 8.
  • a plunger 9 is vertically slidable in a bore 10 formed in the die 2, and is upwardly urged by a coiled spring 11, occupying the bore beneath the plunger.
  • a vertical adjusting screw 12, coaxial with the plunger, is threaded in the top portion of the bore 10, and has its lower end seated on the upper end of the plunger, such screw coacting with the spring 11 to regulate the up-and-down position of the plunger.
  • Slidable in the die 2 radially thereof is a latch bolt 13, the outer end of which is adapted to enter a circular groove 14 formed in and opening from the inner face of the socket '7.
  • a tensional coiled spring 15 is mounted on a stem 16 extending rigidly inward from the bolt 13, said spring tending to establish the inner limiting position of the bolt, in
  • the circular form of the groove 14 serves to permit the bolt to take effect regardless of any particular rotative relation between the die and retainer.
  • the plunger 9 is diametrically slotted at 17 to accommodate the stem 16, whereby the plunger may undergo the desired up-and-down travel without impediment by said stern and is held by the latter from rotation.
  • the plunger 9 has a notch 18 in its lower portion, and the upper end of said notch forms an inclined cam 19 coacting with a similarly inclined cam 20 on the inner end of the bolt 13.
  • the reference characters 1a8a correspond to the characters 1-8, as applied to the first-described modification.
  • Said screw is engageable at its upper end by a screw-driver (not shown), or is otherwise adapted for rotative actuation.
  • said screw is integrally formed with a cam 23 of inverted conical form, said cam having point contact with a metal ball 24, rotatively set into a runway 25 formed in the die 2a and opening in the peripheral wall of said die.
  • the runway extends to and opens into the lower end of the bore 21.
  • the runway has a slight downward inclination in extending inwardly, so that the ball tends to roll of its own weight toward the inner end of the runway.
  • an abutment 26 Set rigidly into the intercommunicating ends of the bore 21 and runway 25, is an abutment 26 which limits inward travel of the ball 24, positioning the latter fully within the die and so avoiding any latching effect.
  • the ball allows free up-and-down actuation of the die, and the latter is readily removable from its socket 7a. If the screw is downwardly adjusted to its lowermost position, as per FIG.
  • the cam 23 displaces the ball up the inclined runway and at least partially into a circular groove 27 formed in the retainer 8a peripherally of the socket 7a.
  • an adjustment of the screw to its lower limit may apply a considerable outward force to the ball to establish and maintain its latching position, as best appears in FIG. 4.
  • a punch and die mechanism comprising a punch reciprocatory up and down, a die formed with a passage accommodating the punch and adapted for shearing coaction with the punch, a retainer having a socket wherein the die is removably received, the peripheral face of the socket having a recess formed in the peripheral face of the socket, a plunger slidable in substantially up and down travel in the die at one side of said passage, a bolt slidable in the die to have releasable engagement in said recess to resist withdrawal of said die from said socket, the plunger and bolt having interengageable cam faces, retractable drive means to actuate the plunger in downward sliding travel whereby said cam faces urge said bolt into said releasable engagement, means yieldable urging said plunger in upward travel responsive to retraction of said drive means, and means to urge said bolt to slidably disengage from said recess consequent to said upward travel to afford.
  • a punch and die mechanism comprising a reciprocatory punch, a die formed with a passage accommodating the punch and adapted for shearing coaction with the punch, a retainer having a socket wherein the die is removably received, the peripheral face of the socket having a recess, a plunger movable in substantially up and down travel in the die, said plunger forming at its lower end All a cam of inverted conical form, a ball set into a runway formed in the die and opening from said recess to the lower end of the plunger at a downward inclination, and means on the die for actuating the plunger up and down and thereby disengaging or engaging the ball to shift the ball up or down the inclination of its runway to engage it in or disengage it from said recess, said runway being formed with an abutment at its inner end limiting travel of the ball down the runway, and thus maintaining proper engagement of the ball with said cam.

Description

Dec. 6, 1966 D. L. PICCONE 3,289,519
LATCH MECHANISM FOR DIE BLOCK OF PUNCH PRESS Filed Dec. 14, 1964 2 Sheets-Sheet l FIG-l INVENTOR.
/ DONATO L. PICCONE ATTORN EY Dec. 6, 1966 D. L. PICCONE 3,289,519
LATCH MECHANISM FOR DIE BLOCK OF PUNCH PRESS Filed Dec. 14, 1964 2 Sheets-Sheet 8 TI IA H III 1 um. 3A
INVENTOR DONATO L. PICCONE ATTORNEY United States Patent 3,289,519 LATCH MECHANISM FOR DIE BLOCK 0F PUNCH PRESS Donato L. Piccone, 315 E. Williams, Ann Arbor, Mich. Filed Dec. 14, 1964, Ser. No. 418,018 Claims. (Cl. 83-685) This invention relates to punch and die mechanisms, particularly as used in punch presses.
Operation of a punch press commonly imposes heavy wear on the punch and die, thus necessitating unduly frequent replacement of said parts to assure accurate shearing. Changes in shape and'size of openings to be formed in different types of work also occasionally require replacements of dies and punches. Such. replacements have been laborious and time-consuming and hence a source of considerable expense.
A primary object of the invention is to provide a simple and inexpensive mechanism whereby a die coacting with a punch may be readily and firmly latched to or released from its retainer.
Another object is to provide a bolt for latching a die in a retainer by means of a plunger actuable in the die to establish and maintain the effective position of said bolt, coacting cam faces being formed on the plunger and bolt for eifecting such actuation.
Another object is to employ a metal ball as a latch bolt for either securing a die in its use position or releasing it to afford its ready removal.
These and various other objects are attained as appears in the accompanying drawings, wherein:
FIG. 1 is a fragmentary vertical axial sectional view of my improved latch mechanism as applied to a punch press, the latching position of such mechanism being shown.
FIG. 2 is a similar sectional view of the latch mechanism, but showing its released position.
FIG. 3 is a vertical sectional detail of the latch mechanism, taken on the line 3--3 of FIG. 2.
FIG. 4 is a view similar to FIG. 1, but illustrates another embodiment of the invention.
FIG. 5 is an enlarged fragmentary vertical sectional detail of the modification appearing in FIG. 4, and shows a released position of the mechanism.
Describing first the invention as illustrated by FIGS. 1-3, the reference character 1 designates the usual punch of a punch-press, said punch being vertically reciprocatory to and from a cylindrical die 2. Adjoining its top face, the die 2 is formed with a circular aperture 3 proportioned for shearing coaction with the punch. A workpiece exemplified at 4 and usually of sheet-metal is disposed across the die for perforation by the punch. The die is formed with a frustoconical passage 5, downwardly extended from the aperture 3 and opening in the bottom face of the die to accommodate disks 6 struck out of the work by a punching operation. The die is proportioned to slide vertically with no material lateral motion in a cylindrical socket 7 formed in the die retainer 8.
At one side of the passage 5 and aperture 3, a plunger 9 is vertically slidable in a bore 10 formed in the die 2, and is upwardly urged by a coiled spring 11, occupying the bore beneath the plunger. A vertical adjusting screw 12, coaxial with the plunger, is threaded in the top portion of the bore 10, and has its lower end seated on the upper end of the plunger, such screw coacting with the spring 11 to regulate the up-and-down position of the plunger. Slidable in the die 2 radially thereof is a latch bolt 13, the outer end of which is adapted to enter a circular groove 14 formed in and opening from the inner face of the socket '7. A tensional coiled spring 15 is mounted on a stem 16 extending rigidly inward from the bolt 13, said spring tending to establish the inner limiting position of the bolt, in
3,289,519 Patented Dec. 6, 1966 which position the bolt is clear of the retainer 8. The circular form of the groove 14 serves to permit the bolt to take effect regardless of any particular rotative relation between the die and retainer. The plunger 9 is diametrically slotted at 17 to accommodate the stem 16, whereby the plunger may undergo the desired up-and-down travel without impediment by said stern and is held by the latter from rotation. The plunger 9 has a notch 18 in its lower portion, and the upper end of said notch forms an inclined cam 19 coacting with a similarly inclined cam 20 on the inner end of the bolt 13.
When the screw 12 downwardly actuates the plunger, as in FIG. 1, the cam faces interengage to shift the bolt outwardly to its latching position by insertion of the bolt in the groove 14. Because of the mechanical advantage afforded by the screw, a considerable pressure may be readily applied to the bolt to maintain its latching position. When the screw 12 permits the plunger to assume its raised position, as in FIG. 2, the spring 15 shifts the bolt 13 inwardly, disengaging the cams 19 and 20 and permits ready upward removal of the die from its socket 7. Prevention of rotation of the plunger 9 is of importance in maintaining the proper opposed and coacting relation between the cams 19 and 20.
Describing now the modification illustrated by FIGS. 4 and 5, the reference characters 1a8a correspond to the characters 1-8, as applied to the first-described modification. Formed in the die 2a, at one side of the passage 5a, is a bore 21 downwardly extended from the top face of the die and having its upper portion threaded to mesh with an adjusting screw 22. Said screw is engageable at its upper end by a screw-driver (not shown), or is otherwise adapted for rotative actuation. At its lower end, said screw is integrally formed with a cam 23 of inverted conical form, said cam having point contact with a metal ball 24, rotatively set into a runway 25 formed in the die 2a and opening in the peripheral wall of said die. From such wall, the runway extends to and opens into the lower end of the bore 21. The runway has a slight downward inclination in extending inwardly, so that the ball tends to roll of its own weight toward the inner end of the runway. Set rigidly into the intercommunicating ends of the bore 21 and runway 25, is an abutment 26 which limits inward travel of the ball 24, positioning the latter fully within the die and so avoiding any latching effect. Thus, at its inner limit of travel, the ball allows free up-and-down actuation of the die, and the latter is readily removable from its socket 7a. If the screw is downwardly adjusted to its lowermost position, as per FIG. 4, the cam 23 displaces the ball up the inclined runway and at least partially into a circular groove 27 formed in the retainer 8a peripherally of the socket 7a. Thus, an adjustment of the screw to its lower limit may apply a considerable outward force to the ball to establish and maintain its latching position, as best appears in FIG. 4.
What I claim is:
1. A punch and die mechanism comprising a punch reciprocatory up and down, a die formed with a passage accommodating the punch and adapted for shearing coaction with the punch, a retainer having a socket wherein the die is removably received, the peripheral face of the socket having a recess formed in the peripheral face of the socket, a plunger slidable in substantially up and down travel in the die at one side of said passage, a bolt slidable in the die to have releasable engagement in said recess to resist withdrawal of said die from said socket, the plunger and bolt having interengageable cam faces, retractable drive means to actuate the plunger in downward sliding travel whereby said cam faces urge said bolt into said releasable engagement, means yieldable urging said plunger in upward travel responsive to retraction of said drive means, and means to urge said bolt to slidably disengage from said recess consequent to said upward travel to afford.
withdrawal of said die from said socket.
2. A punch and die mechanism as set forth in claim 1, said yieldable means being a coiled spring applying upthrust to the plunger.
3. A punch and die mechanism as set forth in claim 1, said recess being a substantially circular groove substantially concentric with the socket.
4. A punch and die mechanism as set forth in claim 1, the plunger having a slot elongated along the plunger axis, and a stem on the bolt extending through said slot and resisting rotation of the plunger.
5. A punch and die mechanism comprising a reciprocatory punch, a die formed with a passage accommodating the punch and adapted for shearing coaction with the punch, a retainer having a socket wherein the die is removably received, the peripheral face of the socket having a recess, a plunger movable in substantially up and down travel in the die, said plunger forming at its lower end All a cam of inverted conical form, a ball set into a runway formed in the die and opening from said recess to the lower end of the plunger at a downward inclination, and means on the die for actuating the plunger up and down and thereby disengaging or engaging the ball to shift the ball up or down the inclination of its runway to engage it in or disengage it from said recess, said runway being formed with an abutment at its inner end limiting travel of the ball down the runway, and thus maintaining proper engagement of the ball with said cam.
References Cited by the Examiner UNITED STATES PATENTS 1,621,811 3/1927 Richard et al 83-698 X 2,009,371 7/ 1935 Iunge 28753 2,364,401 12/ 1944 Stellin 83698 X 2,737,056 3/ 1956 Baumgartner.
3,190,165 6/1965 Schott.
ANDREW R. JUHASZ, Primary Examiner.

Claims (1)

1. A PUNCH AND DIE MECHANISM COMPRISING A PUNCH RECIPROCATORY UP AND DOWN, A DIE FORMED WITH A PASSAGE ACCOMMODATING THE PUNCH AND ADAPTED FOR SHEARING COACTION WITH THE PUNCH, A RETAINER HAVING A SOCKET WHEREIN THE DIE IS REMOVABLY RECEIVED, THE PERIPHERAL FACE ON THE SOCKET HAVING A RECESS FROMED IN THE PERIPHERAL FACE OF THE SOCKET, A PLUNGER SLIDABLE IN SUBSTANTIALLY UP AND DOWN TRAVEL IN THE DIE AT ONE SIDE OF SAID PASSAGE, A BOLT SLIDABLE IN THE DIE TO HAVE RELEASABLE ENGAGEMENT IN SAID RECESS TO RESIST WITHDRAWAL OF SAID DIE FROM SAID SOCKET, THE PLUNGER AND BOLT HAVING INTERENGAGEABLE CAM FACES, RETRACTABLE DRIVE MEANS TO ACTUATE THE PLUNGER IN DOWNWARD SLIDING TRAVEL WHEREBY SAID CAM FACES URGE SAID BOLT INTO SAID RELEASABLE ENGAGEMENT, MEANS YIELDABLE URGING SAID PLUNGER IN UPWARD TRAVEL RESPONSIVE TO RETRACTION OF SAID DRIVE MEANS, AND MEANS TO URGE SAID BOLT TO SLIDABLY DISENGAGE FROM SAID RECESS CONSEQUENT TO SAID UPWARD TRAVEL TO AFFORD WITHDRAWAL OF SAID DIE FROM SAID SOCKET.
US418018A 1964-12-14 1964-12-14 Latch mechanism for die block of punch press Expired - Lifetime US3289519A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640170A (en) * 1969-12-05 1972-02-08 Arthur D Bennett Retainer for punch and die sets
US4927305A (en) * 1988-09-02 1990-05-22 Peterson Charles D Tightening device for threaded connectors
US5042352A (en) * 1990-06-04 1991-08-27 Strippit, Incorporated Quick change tool holder
US5970838A (en) * 1899-12-27 1999-10-26 Rainer S.R.L. Machine for punching sheet metal with a counterpunch extracting means
US20050051016A1 (en) * 2003-09-04 2005-03-10 Makoto Mori Paper punch apparatus
US20140182437A1 (en) * 2012-12-28 2014-07-03 National Kaohsiung First University Of Science And Technology Trimming die and punch thereof
US20140331842A1 (en) * 2011-11-11 2014-11-13 Wilson Tool International Inc. Punch assemblies and universal punch therefor
US20160339502A1 (en) * 2011-11-11 2016-11-24 Wilson Tool International Inc. Punch assemblies and universal punch therefor
US9776337B2 (en) 2008-11-06 2017-10-03 Wilson Tool International Inc. Punch assemblies and methods for modifying
USD820328S1 (en) 2015-12-31 2018-06-12 Mate Precision Tooling, Inc. Punch insert
USD822725S1 (en) 2015-12-31 2018-07-10 Mate Precision Tooling, Inc. Punch insert
US10328479B2 (en) 2015-02-09 2019-06-25 Mate Precision Tooling, Inc. Punch assembly with replaceable punch tip secured by coupling pin
US11667051B2 (en) 2020-09-23 2023-06-06 Wilson Tool International Inc. Punch assemblies and toolless systems thereof for tip retention and release

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1621811A (en) * 1922-08-24 1927-03-22 Otis K Richard Punch and die retainer
US2009371A (en) * 1934-06-12 1935-07-23 J E Reinecker A G Change gear mechanism
US2364401A (en) * 1944-03-06 1944-12-05 Domnic V Stellin Interchangeable punch and die and retainer for same
US2737056A (en) * 1953-09-14 1956-03-06 John R Baumgartner Backlash eliminator
US3190165A (en) * 1961-03-06 1965-06-22 Houdaille Industries Inc Structure for punching machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1621811A (en) * 1922-08-24 1927-03-22 Otis K Richard Punch and die retainer
US2009371A (en) * 1934-06-12 1935-07-23 J E Reinecker A G Change gear mechanism
US2364401A (en) * 1944-03-06 1944-12-05 Domnic V Stellin Interchangeable punch and die and retainer for same
US2737056A (en) * 1953-09-14 1956-03-06 John R Baumgartner Backlash eliminator
US3190165A (en) * 1961-03-06 1965-06-22 Houdaille Industries Inc Structure for punching machine

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5970838A (en) * 1899-12-27 1999-10-26 Rainer S.R.L. Machine for punching sheet metal with a counterpunch extracting means
US3640170A (en) * 1969-12-05 1972-02-08 Arthur D Bennett Retainer for punch and die sets
US4927305A (en) * 1988-09-02 1990-05-22 Peterson Charles D Tightening device for threaded connectors
US5042352A (en) * 1990-06-04 1991-08-27 Strippit, Incorporated Quick change tool holder
US20050051016A1 (en) * 2003-09-04 2005-03-10 Makoto Mori Paper punch apparatus
US7270042B2 (en) * 2003-09-04 2007-09-18 Carl Manufacturing Co., Ltd. Paper punch apparatus
US20070295184A1 (en) * 2003-09-04 2007-12-27 Makoto Mori Paper punch apparatus
US9776337B2 (en) 2008-11-06 2017-10-03 Wilson Tool International Inc. Punch assemblies and methods for modifying
US20140331842A1 (en) * 2011-11-11 2014-11-13 Wilson Tool International Inc. Punch assemblies and universal punch therefor
US9409223B2 (en) * 2011-11-11 2016-08-09 Wilson Tool International Inc. Punch assemblies and universal punch therefor
US20160339502A1 (en) * 2011-11-11 2016-11-24 Wilson Tool International Inc. Punch assemblies and universal punch therefor
US9718109B2 (en) * 2011-11-11 2017-08-01 Wilson Tool International Inc. Punch assemblies and universal punch therefor
US20140182437A1 (en) * 2012-12-28 2014-07-03 National Kaohsiung First University Of Science And Technology Trimming die and punch thereof
US10328479B2 (en) 2015-02-09 2019-06-25 Mate Precision Tooling, Inc. Punch assembly with replaceable punch tip secured by coupling pin
US10646913B2 (en) 2015-02-09 2020-05-12 Mate Precision Tooling, Inc. Punch assembly with replaceable punch tip
US10751781B2 (en) 2015-02-09 2020-08-25 Mate Precision Tooling, Inc. Punch assembly with replaceable punch tip
USD820328S1 (en) 2015-12-31 2018-06-12 Mate Precision Tooling, Inc. Punch insert
USD822725S1 (en) 2015-12-31 2018-07-10 Mate Precision Tooling, Inc. Punch insert
US11667051B2 (en) 2020-09-23 2023-06-06 Wilson Tool International Inc. Punch assemblies and toolless systems thereof for tip retention and release

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