US3779122A - Punch press with assembly locking mechanism - Google Patents

Punch press with assembly locking mechanism Download PDF

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Publication number
US3779122A
US3779122A US00274256A US3779122DA US3779122A US 3779122 A US3779122 A US 3779122A US 00274256 A US00274256 A US 00274256A US 3779122D A US3779122D A US 3779122DA US 3779122 A US3779122 A US 3779122A
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US
United States
Prior art keywords
die
slot
arm
counterbore
shoe
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
US00274256A
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English (en)
Inventor
R Sawvell
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.)
WHITNEY CORP W
WHITNEY W CORP US
W A Whitney Co
Original Assignee
WHITNEY CORP W
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 WHITNEY CORP W filed Critical WHITNEY CORP W
Application granted granted Critical
Publication of US3779122A publication Critical patent/US3779122A/en
Anticipated expiration legal-status Critical
Assigned to CONTINENTAL BANK N.A., AS AGENT reassignment CONTINENTAL BANK N.A., AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: W. A. WHITNEY CORP.
Assigned to W.A. WHITNEY CO. reassignment W.A. WHITNEY CO. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: W. A. WHITNEY CORP.
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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • 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
    • B21D37/04—Movable or exchangeable mountings for tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S100/00—Presses
    • Y10S100/918—Bolster and die
    • 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

  • ABSTRACT The die assembly is clamped to a die shoe by a locking arm which, when released, permits the assembly to be inserted into and removed from the shoe in a horizontal direction in order to avoid the vertical obstruction presented by a stripper overhanging the shoe.
  • the arm is clamped and released by a vertically reciprocable rod carrying a pin which rides in an inclined slot in the arm to convert the verticalforce exerted by the rod into a horizontally directed clamping force of rela tively large magnitude.
  • This invention relates to a punch press and, more particularly, to a punch press with mechanism for locking a removable die assembly securely in a die shoe while a vertically reciprocable punch performs a punching operation on a workpiece located between the punch and the underlying die assembly.
  • the general aim of thepresent invention is to provide a punch press with a novel die assembly locking mechanism which coacts with a uniquely constructed die shoe to lock the die assembly securely in the shoe while permitting the assembly to be quickly and easily inserted into and removed from the shoe in a horizontal direction without obstruction from the overlying stripper housing.
  • a more detailed object is to achieve the foregoing through the provision of a locking mechanism with a locking arm which, when released from the die assembly, is located below a radially extending slot in the die shoe so as to permit horizontal movement of the assem bly through the slot and into or out of the shoe.
  • the invention also resides in the novel construction of the die shoe to securely seat and accurately locate the die assembly around its entire periphery and yet, at the same time, to enable removal of the assembly without need of moving the stripper housing.
  • FIG'. 1 is a fragmentary elevational view of a punch press embodying the novel features of the present invention, parts being broken away and shown in section.
  • FIG. 2 is a fragmentary view similar to FIG. 1 but showing certain parts in moved positions.
  • FIG. 3 is a fragmentary plan view of the die assembly and locking mechanism and is taken along the line 3-3 of FIG. 1.
  • FIG; 4 is an enlarged fragmentary cross-section taken I substantially along the line 4-4 of FIG. 3.
  • the invention is embodied in a punch press in which a punch 11 is rcciprocated upwardly and downwardly and coacts with an underlying die 13 to form a hole in an intervening workpiece (not shown) during each downstroke of the punch.
  • a cylindrical stripper housing 14 Surrounding the punch is a cylindrical stripper housing 14 whose lower end carries an apertured stripper plate 15 which overlies the upper surface of the workpiece.
  • the stripper plate 15 always remains in a fixed position and engages the workpiece on the upstroke of the punch 11 thereby to strip the workpiece from the punch as the punch is re tracted.
  • the minimum vertical clearance between the stripper plate and the die is approximately one-eighth inch, and, to accomodate workpieces of greater thicknesses, the stripper housing 14 and plate 15 may be adjusted upwardlythrough a distance as much as five-eighths inch in essentially the same manner as disclosed in Scott US. application Ser.
  • a die adapter 17 which is usually matched to the die and is sized and shaped to fit snugly but removably in a die shoe 19.
  • the upper end of the die shoe 19 is formed with a generally circular and upwardly opening recess in the form of a counterbore 25 whose side and bottom walls are precisely finished and define a seat into which the die adapter 17 is removably telescoped and accurately located.
  • a generally similar counterbore 26 is formed in the die adapter 17 and receives and accurately locates the die 13.
  • an upwardly opening and radially extending keyway 27 is formed through the rear side wall of the counterbore 25 and slidably but snugly receives a rigid key 29 projecting outwardly from the rear of the adapter.
  • a cylindrical key 30 extends slidably through the front wall of the counterbore 26 in the adapter and seats at its inner end in a downwardly and forwardly inclined notch 31 formed in the front of the die.
  • A. coiled compression spring 33 (FIG. I) is telescoped into a hole 34 drilled in the upper side of the adapter and fits into a flatbottomed notch 35 on the underside of the key 30 to permit radial sliding of the latter through a limited distance out of the notch 31 while retaining the key in the adapter.
  • the locking mechanism includes a locking arm 39 which clamps the die assembly when disposed in a locked position shown in FIG. 1 and which, upon being moved to a released position shown in FIG. 2, is disposed below the bottom 40 of a radially extending slot 41 in the counterbore 25 of the die shoe 19 so as to permit horizontal removal of the die assembly through the slot and across the arm.
  • the die assembly can be removed quickly and easily from the shoe in spite of the limited vertical clearance between the die 13 and the stripper housing 14 and, by the same token, a different die assembly can be easily loaded into the shoe.
  • the slot 41 in the die shoe 19 opens upwardly and extends radially through the front wall of the counterbore 25, has a width just slightly greater than the diameter of the counterbore, and preferably is formed with a depth which is somewhat less than the depth of the counterbore.
  • the difference between the depth of the slot 41 and the depth of the counterbore 25 is just slightly less than the minimum vertical clearance between the die 13 and the stripper housing 14 and, in this particular instance, is thus just slightly less than one-eighth inch.
  • a short vertical portion 43 (FIG. 2) of the front wall of the counterbore 25 is left intact around and below the slot to pilot and locate the die adapter 17 and yet the adapter can be. lifted vertically to the level of the bottom 40 of the slot and then moved horizontally through the slot and out of the shoe 19.
  • the locking arm 39 is located forwardly of and is centered relative to the slot 41 (see FIGS. 1 and 3) and is formed by an upper nose 45 (FIG. which extends across and is joined to a pair of horizontally spaced and vertically extending plates 46. The latter straddle an upstanding support block 47 fitted in a hole 49 (FIG. 1) in the bolster plate 21 and bolted to a mounting strip 50 secured to the underside of the bolster plate.
  • a sheet metal housing 51 secured to the bolster plate encloses the support block 47 and includes a top wall formed with an upwardly opening slot 53 through which the locking arm projects when the latter is in its locked positionshown in FIG. 1.
  • the nose 45 of the locking arm is retracted into the housing and is spaced below the top of the housing when the locking arm is in its released position shown in FIG. 2.
  • a horizontal pivot pin 55 is located forwardly of and below the slot 41 and extends through the plates 46 and the support block 47 to mount the locking arm 39 for swinging between its locked and released positions.
  • a pneumatic cylinder 56 (FIG. 1) is supported on the underside of the mounting strip 50 and includes a vertically reciprocable rod 57 which extends upwardly through a vertical hole 59 (FIG. 5) in the support block 47.
  • a horizontal pin 60 is carried on the upper end portion of the rod and extends snugly but slidably through a vertical slot 61 in the block and through inclined slots 63 formed in the plates 46, the slots 63 extending across the slot 61 and extending substantially horizontally when the arm is disposed in its released position shown in FIG. 2.
  • the pin 60 rides upwardly in the vertical slot 61 and cams against the upper edges of the slots 63 to swing thelocking arm 39 upwardly about the pin 55 toward the locked position shown in FIG. 1.
  • the nose 45 engages the outer end of the key 30 and forces the latter inwardly against the bottom of the notch 31.
  • the free end 65 of the nose is inclined downwardly and forwardly and thus the nose exerts a downwardly and rearwardly directed force on the key.
  • Such force acts through the die 13 to crowd and clamp the die adapter 17 downwardly and rearwardly against the bottom and rear walls of the counterbore 25 and, at the same time, acts on the die to crowd and clamp the latter downwardly and rearwardly against the bottom and rear walls of the counterbore 26.
  • the slots 63 in the arm are inclined upwardly and outwardly relative to the rod 57 at an angle of about 10 and, as a result, the force exerted on the rear edge of the slots by the pin 60 includes a horizontal component of relatively large magnitude for passing the nose 45 against the key 30. Also, the reaction force on the locking arm is transmitted by the pin 60 to the edges of the vertical slot 61 in the support block 49 and thus such force is ultimately resisted by the bed 23 of the press rather than imposing bending stresses on the rod 57 of the cylinder 56. Accordingly, the unique arrangement of the slots 61 and 63 enables effective actuation of the arm 39 with the vertically movable pin 60 and also avoids the exertion of bending stresses on the rod 57 and the cylinder 56.
  • the die 13 is anchored rigidly within the die adapter 17 and the latter is clamped tightly to the die shoe 19 by the locking arm 39.
  • the adapter is unclamped from the shoe and both the adapter and the die (i.e., the die assembly 16) are removed from the shoe as a unit and replaced with a different die assem-
  • the rod 57- is shifted downwardly to swing the locking arm 39 downwardly to the released position shown in FIG. 2. In this position, the entire arm is disposed below the horizontal plane containing the bottom 40 of the slot 41 in the shoe.
  • the die assembly may be removed from the shoe by first lifting the assembly vertically a slight distance to clear the short portion 43 of the front wall of the counterbore 25 and then by moving the assembly forwardly and horizontally beneath the stripper housing 14, through the slot 41 and across the retracted locking arm 39 (see FIG. 2).
  • a new assembly may be inserted into the shoe by following the same steps in reverse order and thus changing of the disc assemblies may be effected quickly and easily in spite of the obstruction presented by the overhanging stripper housing 14.
  • the present invention brings to the art a new and improved mechanism 37 for effectively locking the die assembly 16 to the die shoe 19 while permitting the assembly to be moved horizontally between the shoe and the stripper housing 14 when inserted into or removed from the shoe.
  • the mechanism 37 is of comparatively simple and compact construction and yet is relatively durable and troublefree dur ing service use.
  • a punch press having a support, a die shoe attached to said support and formed with an upwardly opening recess defining a seat, and a die assembly telescoped removably into said seat and projecting upwardly from said shoe, the improvement in said press comprising, an upwardly opening and radially extending slot formed through one wall of said recess and having a width at least equal to the diameter of the recess, a locking arm, and means mounting said arm on said support for upward and downward movement between;
  • a punch press having a support, a die shoe attached to said support and formed with an upwardly opening counterbore, and a die assembly telescoped removably into said counterbore and projecting upwardly from said shoe, the improvement in said press comprising, an upwardly opening and radially extending slot formed through one wall of said counterbore and having a width at least equal to the diameter of the counterbore, a locking arm mounted on said support to swing upwardly and downwardly about a generally horizontal axis located outwardly of and below said slot, and means connected to said arm for swinging the lattu war y a iqs nward QWQQF EPQQWEQ? a. a locked position in which the arm engages the die assembly and clamps the latter to said die shoe, and
  • a punch press as defined in claim 2 in which the depth of said slot is slightly less than the depth of the counterbore whereby the entire periphery of said die assembly is seated in said counterbore but said assembly may be removed from said shoe by lifting the assembly to the level of the bottom of the slot and then moving the assembly generally horizontally across the bottom of the slot.
  • a punch press as defined in claim 2 further including an elongated and generally vertical slot formed in said support and spaced from said axis, an elongated slot formed through said locking arm and crossing said vertical slot, said means comprising a pin slidably mounted within said elongated slots, and mechanism for reciprocating said pin upwardly and downwardly within said vertical slot.
  • a punch press as defined in claim 4 in which said slot in said locking arm is located so as to slant upwardly and outwardly when said arm is in said locked.
  • a punch press having a support, a die shoe attached to said support and formed with a first upwardly opening counterbore, a die adapter telescoped removably into said first counterbore and formed with a second upwardly opening counterbore. a die telescoped removably into said second counterbore, and a radially extending key mounted slidably in the side wall of said second counterbore and having an inner end engageable with the outer side of said die, the improvement in said press comprising, an upwardly opening and radially extending slot formed through.
  • a locking arm mounted on said support to swing about a generally horizontal axis located outwardly of and below said slot, an elongated vertical slot formed in said support and located outwardly of said axis, an elongated slot formed through said locking arm and crossing said vertical slot, a pin slidably mounted within said elongated slots, and means for reciprocating said pin vertically to swing said locking arm upwardly and downwardly about said axis b ts t y t a. a locked position in which the free end of the arm presses against the outer end of said key to clamp said die into said second counterbore and to clamp said die adapter into said first counterbore, and
  • a punch press as defined in claim 7 in which the depth of said radially extending slot is slightly less than the depth of said first counterbore whereby the entire periphery of said die adapter is seated in said first counterbore but said adapter may be: removed from said shoe by lifting the adapter to the level of the bottom of said radially extending slot and then moving the adapter generally horizontally across the bottom of said radially extending slot.
  • a punch press as defined in claim 7 in which the free end of said arm is inclined downwardly and outwardly when said arm is in said locked position and acts through said key to force said die radially and downwardly against the side and bottom walls, respectively, of said second counterbore and to force said die adapter radially and downwardly against the side and bottom walls, respectively, of said first counterbore.
  • a punch press as defined in claim 7 in which said slot in said locking arm is located so as to slant upwardly and outwardly when said arm is in said locked position.
  • a punch press as defined in claim 10 in which said slot in said locking arm is located so as to extend generally horizontally when said arm is in said released position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US00274256A 1972-07-24 1972-07-24 Punch press with assembly locking mechanism Expired - Lifetime US3779122A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27425672A 1972-07-24 1972-07-24

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US3779122A true US3779122A (en) 1973-12-18

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US00274256A Expired - Lifetime US3779122A (en) 1972-07-24 1972-07-24 Punch press with assembly locking mechanism

Country Status (6)

Country Link
US (1) US3779122A (enrdf_load_stackoverflow)
JP (1) JPS4952388A (enrdf_load_stackoverflow)
CA (1) CA947195A (enrdf_load_stackoverflow)
DE (1) DE2316702A1 (enrdf_load_stackoverflow)
FR (1) FR2193663A1 (enrdf_load_stackoverflow)
IT (1) IT980727B (enrdf_load_stackoverflow)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834218A (en) * 1972-08-08 1974-09-10 Gfm Fertigungstechnik Forging press
US3985056A (en) * 1975-02-17 1976-10-12 Amada Company Limited Multiple tool holding punching unit
US4206667A (en) * 1977-08-31 1980-06-10 Amada Company, Limited Tool holding apparatus for presses
US4485549A (en) * 1983-05-09 1984-12-04 W. A. Whitney Corp. Apparatus for changing the tools of a punch press
US5042352A (en) * 1990-06-04 1991-08-27 Strippit, Incorporated Quick change tool holder
EP0494714A1 (en) * 1991-01-10 1992-07-15 Machinefabriek Wila B.V. Press tool and an adaptor and a press therefor
US5325755A (en) * 1990-03-23 1994-07-05 Kabushiki Kaisha Komatsu Seisakusho Punch press
US5878642A (en) * 1994-09-06 1999-03-09 Utica Enterprises, Inc. Tool holder
WO2000030781A1 (en) * 1998-11-26 2000-06-02 Ketler Aps Locking device for securing a tool in a machine
US6109159A (en) * 1998-05-01 2000-08-29 Amada Mfg America, Inc. Turret punch press
EP1050351A1 (en) * 1999-05-04 2000-11-08 Euromac S.r.l. Device for locking a die holder platform in punching machines for metal plates and the like
US6408726B1 (en) * 1995-12-14 2002-06-25 Lillbacka Jetair Oy Sheet metal work center with a movable lower die operative as a stopper and an upwards forming tool
US6467327B1 (en) 2001-08-15 2002-10-22 Wilson Tool International, Inc. Press brake tool and tool holder
US20040187552A1 (en) * 2003-03-31 2004-09-30 Wila B.V. Combination of a press brake clamping system and at least a press brake tool
US20050000267A1 (en) * 2003-07-01 2005-01-06 Harrington Heath E. Press brake tool having lockable safety key
US20050051016A1 (en) * 2003-09-04 2005-03-10 Makoto Mori Paper punch apparatus
US20050132772A1 (en) * 2003-12-19 2005-06-23 Harrington Heath E. Press brake tooling technology
US20050150338A1 (en) * 2004-01-13 2005-07-14 Morris Elynuik Slug pulling preventing tooling die
US20060174679A1 (en) * 2005-02-08 2006-08-10 Pabich Terry G Press brake tool seating technology
US20070144232A1 (en) * 2003-07-01 2007-06-28 Shimota Jon M Press Brake Tool Safety Key Assemblies
US20080216448A1 (en) * 2007-03-08 2008-09-11 Poly-Clip System Gmbh & Co. Kg Closing tool assembly
USD592685S1 (en) * 2008-04-28 2009-05-19 Mate Precision Tooling, Inc. Punch press die blank
WO2013158341A1 (en) * 2012-04-19 2013-10-24 Firth Rixson Limited Die locking system and method
US9782818B2 (en) 2011-06-08 2017-10-10 Wilson Tool International Inc. Die shoe assembly with bearing surface mechanism, and die for use therewith

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3005089C2 (de) * 1980-02-12 1982-02-04 C. Behrens Ag, 3220 Alfeld Vorrichtung zur auswechselbaren Halterung einer Matrize eines Werkzeugs in einer Metallbearbeitungsmaschine und Werkzeug zur Auswechslung der Matrize
FR2511902A1 (fr) * 1981-08-28 1983-03-04 Libaud Procedes Ateliers Berna Dispositif support de matrice coulissant pour une machine poinconneuse
JPS60186926U (ja) * 1984-05-18 1985-12-11 有限会社　和光金型工業 ポンチ、ダイブツシユ等の金型部品
DE3432671A1 (de) * 1984-09-05 1986-03-13 Fa. Muhr und Bender, 5952 Attendorn Werkzeugmaschine, insbesondere stanze
FR2580988B1 (fr) * 1985-04-30 1988-11-18 Esswein Sa Outil de presse a parties travaillantes interchangeables
JPH0337787Y2 (enrdf_load_stackoverflow) * 1986-03-12 1991-08-09

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2984176A (en) * 1957-05-15 1961-05-16 Us Industries Inc Die clamp
US3195386A (en) * 1962-11-02 1965-07-20 Houdaille Industries Inc Punching machine having tool ejector
US3559522A (en) * 1969-01-28 1971-02-02 Manco Mfg Co Interchangeable die units for hydraulic presses

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2984176A (en) * 1957-05-15 1961-05-16 Us Industries Inc Die clamp
US3195386A (en) * 1962-11-02 1965-07-20 Houdaille Industries Inc Punching machine having tool ejector
US3559522A (en) * 1969-01-28 1971-02-02 Manco Mfg Co Interchangeable die units for hydraulic presses

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834218A (en) * 1972-08-08 1974-09-10 Gfm Fertigungstechnik Forging press
US3985056A (en) * 1975-02-17 1976-10-12 Amada Company Limited Multiple tool holding punching unit
US4206667A (en) * 1977-08-31 1980-06-10 Amada Company, Limited Tool holding apparatus for presses
US4485549A (en) * 1983-05-09 1984-12-04 W. A. Whitney Corp. Apparatus for changing the tools of a punch press
US5325755A (en) * 1990-03-23 1994-07-05 Kabushiki Kaisha Komatsu Seisakusho Punch press
US5042352A (en) * 1990-06-04 1991-08-27 Strippit, Incorporated Quick change tool holder
EP0494714A1 (en) * 1991-01-10 1992-07-15 Machinefabriek Wila B.V. Press tool and an adaptor and a press therefor
US5245854A (en) * 1991-01-10 1993-09-21 Mechinefabriek Wila B.V. Press tool and an adaptor and a press therefor
US6256857B1 (en) * 1994-09-06 2001-07-10 Utica Enterprises Inc. Tool holder
US5878642A (en) * 1994-09-06 1999-03-09 Utica Enterprises, Inc. Tool holder
US6408726B1 (en) * 1995-12-14 2002-06-25 Lillbacka Jetair Oy Sheet metal work center with a movable lower die operative as a stopper and an upwards forming tool
US6109159A (en) * 1998-05-01 2000-08-29 Amada Mfg America, Inc. Turret punch press
WO2000030781A1 (en) * 1998-11-26 2000-06-02 Ketler Aps Locking device for securing a tool in a machine
EP1050351A1 (en) * 1999-05-04 2000-11-08 Euromac S.r.l. Device for locking a die holder platform in punching machines for metal plates and the like
US6467327B1 (en) 2001-08-15 2002-10-22 Wilson Tool International, Inc. Press brake tool and tool holder
US6732564B2 (en) 2001-08-15 2004-05-11 Wila B.V. Press brake tool and tool holder
US20040187552A1 (en) * 2003-03-31 2004-09-30 Wila B.V. Combination of a press brake clamping system and at least a press brake tool
US6928852B2 (en) 2003-03-31 2005-08-16 Wila B.V. Combination of a press brake clamping system and at least a press brake tool
US20060191313A1 (en) * 2003-07-01 2006-08-31 Harrington Heath E Press brake tool having lockable safety key
US20050000267A1 (en) * 2003-07-01 2005-01-06 Harrington Heath E. Press brake tool having lockable safety key
US7661288B2 (en) 2003-07-01 2010-02-16 Wilson Tool International Inc. Press brake tool safety key assemblies
US20070144232A1 (en) * 2003-07-01 2007-06-28 Shimota Jon M Press Brake Tool Safety Key Assemblies
US7004008B2 (en) 2003-07-01 2006-02-28 Wilson Tool International, Inc. Press brake tool having lockable safety key
US7270042B2 (en) * 2003-09-04 2007-09-18 Carl Manufacturing Co., Ltd. Paper punch apparatus
US20050051016A1 (en) * 2003-09-04 2005-03-10 Makoto Mori Paper punch apparatus
US20070295184A1 (en) * 2003-09-04 2007-12-27 Makoto Mori Paper punch apparatus
US20060162418A1 (en) * 2003-12-19 2006-07-27 Wilson Tool International, Inc. Press brake tooling technology
US7021116B2 (en) 2003-12-19 2006-04-04 Wilson Tool International, Inc. Press brake tooling technology
US20070089477A1 (en) * 2003-12-19 2007-04-26 Wilson Tool International Inc. Press brake tooling technology
US20050132772A1 (en) * 2003-12-19 2005-06-23 Harrington Heath E. Press brake tooling technology
US7210384B2 (en) * 2004-01-13 2007-05-01 Degelman Industries Ltd. Slug pulling preventing tooling die
US20050150338A1 (en) * 2004-01-13 2005-07-14 Morris Elynuik Slug pulling preventing tooling die
US7721586B2 (en) 2005-02-08 2010-05-25 Wilson Tool International Inc. Press brake tool seating technology
US20060174679A1 (en) * 2005-02-08 2006-08-10 Pabich Terry G Press brake tool seating technology
US20080216448A1 (en) * 2007-03-08 2008-09-11 Poly-Clip System Gmbh & Co. Kg Closing tool assembly
US7694490B2 (en) * 2007-03-08 2010-04-13 Poly-Clip System Gmbh & Co. Kg Closing tool assembly
USD592685S1 (en) * 2008-04-28 2009-05-19 Mate Precision Tooling, Inc. Punch press die blank
US9782818B2 (en) 2011-06-08 2017-10-10 Wilson Tool International Inc. Die shoe assembly with bearing surface mechanism, and die for use therewith
WO2013158341A1 (en) * 2012-04-19 2013-10-24 Firth Rixson Limited Die locking system and method
US9061346B2 (en) 2012-04-19 2015-06-23 Firth Rixson Limited Die locking system and method

Also Published As

Publication number Publication date
DE2316702A1 (de) 1974-02-07
CA947195A (en) 1974-05-14
FR2193663A1 (enrdf_load_stackoverflow) 1974-02-22
IT980727B (it) 1974-10-10
JPS4952388A (enrdf_load_stackoverflow) 1974-05-21

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