US3848496A - Die and spring assemblies having particular application to stripper plates - Google Patents

Die and spring assemblies having particular application to stripper plates Download PDF

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Publication number
US3848496A
US3848496A US00323955A US32395573A US3848496A US 3848496 A US3848496 A US 3848496A US 00323955 A US00323955 A US 00323955A US 32395573 A US32395573 A US 32395573A US 3848496 A US3848496 A US 3848496A
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United States
Prior art keywords
die
stripper plate
spring
spring means
plate
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
US00323955A
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English (en)
Inventor
H Stevens
A Randolph
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.)
Dayton Progress Corp
Original Assignee
Dayton Progress Corp
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 Dayton Progress Corp filed Critical Dayton Progress Corp
Priority to US00323955A priority Critical patent/US3848496A/en
Priority to IL43631A priority patent/IL43631A0/xx
Priority to AU62712/73A priority patent/AU6271273A/en
Priority to IT53937/73A priority patent/IT997671B/it
Priority to CA187,087A priority patent/CA1003744A/en
Priority to DE2361845A priority patent/DE2361845A1/de
Priority to GB5853573A priority patent/GB1469100A/en
Priority to JP49007489A priority patent/JPS49103286A/ja
Priority to US05/499,269 priority patent/US3938794A/en
Application granted granted Critical
Publication of US3848496A publication Critical patent/US3848496A/en
Anticipated expiration legal-status Critical
Assigned to WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT reassignment WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT PATENT COLLATERAL ASSIGNMENT AND SECURITY AGREEMENT Assignors: DAYTON PROGRESS CORPORATION, DAYTON PROGRESS INTERNATIONAL CORPORATION, P.C.S. COMPANY
Assigned to P.C.S. COMPANY, DAYTON PROGRESS CORPORATION, DAYTON PROGRESS INTERNATIONAL CORPORATION reassignment P.C.S. COMPANY RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: WELLS FARGO BANK, NATIONAL ASSOCIATION
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
    • 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
    • Y10T83/2144—Single stripper operative upon plural 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
    • 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 open spaces between the coils of a contained spring are reduced to a dimension less than that of the thickness of the coils themselves. This prevents the coils from winding or screwing and from materially affecting the prescribed pre-load in event of spring breakage.
  • the invention further features means to maintain the stripper spring preload constant and to preserve a constant relation of component parts of the die when adjustment of the die tools is required.
  • the stripper plate of a die is intended to serve several important functions. These functions should include a flattening of the stock to which the die tools are applied, prior to their impact. If not properly achieved, the surface of the stock presented to the tool might be wavy and cause fracture or malfunction of the die tools.
  • a second desired function of a stripper plate is to prevent lateral movement of the stock. Failure to achieve this will obviously result in ruin of the stock.
  • a third desired function of the stripper plate is to strip stock from the die tools, as a die is moved from its closed to its open position following a cutting, perforating, or forming operation by the tools.
  • the present invention obviates the above noted problems as well as other problems which are inherent in prior art practice referenced to the subject matter at hand. It provides an improved die incorporating a spring biased stripper plate, the backing springs of which are preloaded and so applied that there is no pressure on the stripper plate in an open position of the die. Means are provided to facilitate the adjustment of the position of the stripper plate without affecting the preload of the stripper springs. Thus, in accordance with the invention practice the spring preload may be maintained constant.
  • a primary object of the invention is to provide improvements in dies which are economical to fabricate and render the dies more efficient and satisfactory in use, adaptable to a wider variety of applications and unlikely to malfunction.
  • Another object of the invention is to provide an improved spring assembly having a particularly advantageous application as a means for biasing a stripper plate forming part of a die.
  • a further object of the invention is to provide a die wherein a stripper plate may be backed by springs which may be maintained under a constant load which in an open position of the die apparatus applies no pressure to the stripper plate and thereby facilitates assembly and maintenance.
  • An additional object of the invention is to provide simple and inexpensive means for a compensating adjustment in the position of a stripper plate in a die without adding load to its spring biasing means.
  • 'A further object of the invention is to provide improved means for suspension of a stripper plate in a die.
  • Another object of the invention is to provide improvements in dies and components thereof and in particular a stripper spring assembly possessing the advantageous structural features, the inherent meritorious characteristics and the means and mode of use herein described.
  • FIG. 1 is a fragmentary view of a die in an open position, shown partly diagrammatic and in cross section, embodying the various features of the present invention.
  • FIG. 2 is a view similar to that shown in FIG. 1 but illustrating the die in a closed position.
  • elements of the die include a tool or punch retainer plate 10, a matrix or die retainer plate 12 and an interposing stripper plate 14.
  • the plate 10 is backed by and releasably attached to an upper die shoe 11. The latter is suitably fixed to the ram of the press (not shown). Bolts are conventionally applied to hold the plate 10 in a fixed relation to the die shoe.
  • the die retainer plate 12 as installed, will have a fixed mount to a lower die shoe (not shown) and forms a work surface over which a piece of stock W is positioned for performance of work thereon by suitable die tools fixed to and projected from the plate 10.
  • the tool retainer plate 10 and its backing shoe 11, and the die retainer plate 12 and its backing shoe may be regarded as providing,
  • an upper or first die means and a second or lower die means.
  • the tool or punch retainer plate has a plurality of through bores 16, the upper end of each of which is expanded adjacent the die shoe 11 by a counterbore 18.
  • Each bore 16 accommodates the shank of a perforator or punch type tool 20 the head of which is expanded to provide thereon an external flange which seats to the annular shoulder provided by the counterbore 18. It will be noted that the surface defining the head extremity of each punch 20 will so position that it is flush with the uppermost surface of the plate 10.
  • Each punch element 20 projects through and beyond the plate 10 and at the outer projected extremity thereof has a reduced diameter work engaging portion 22.
  • the plate 10 has a further plurality of through bores 28, each of which accommodates the projection therethrough of a hanger device 24.
  • Each device 24 includes a cylindrical sleeve 26 which has a sliding fit with respect to the wall defining its bore 28.
  • each sleeve 26 projects through and beyond the bore 28 and has an external flange 27 which has an annular configuration.
  • the flange 27 is adapted to seat to the upper surface of the plate 10, about the bore 28 in which the sleeve is inserted.
  • the opposite end of the sleeve 26 projects, in each case, through and beyond its bore 28 to orient in a substantially parallel relation to the punch elements 20.
  • a socket head cap screw 25 is further comprised in each hanger device 24.
  • the threaded shank of the screw is projected through the sleeve 26 to have its lower extremity project through and beyond what might be regarded as a lower or outer end of the sleeve.
  • the projection of the screw 25 is limited as its relatively enlarged head 30 seats on the flange 27. It is noted that the head 30 has a socket to receive an Allen type wrench.
  • the plate 10 is formed with a plurality of additional through bores 36, each of which accommodates a caged spring assembly 38.
  • Each spring assembly 38 has a generally cylindrical configuration which, as installed, has a generally parallel relation to the punches 20 and the hanger devices 24.
  • the outer housing 44 of each spring assembly has a generally cylindrical tube form and its respective vertical extremities are each turned over to define inwardly projected and radially directed flange-like abutment portions 29 and 31. With reference to the drawings, it may be seen that the upper abutment portion or flange 29 defines an opening the center ofwhich lies in the central or vertical axis of the housing 44.
  • Each housing 44 provides a cage for a coil spring 46 the lower extremity of which seats to the lower flange or abutment 31 while its upper extremity positions concentrically about the pin-like lower end portion of a plunger element 48.
  • the plunger 48 has an intermediately positioned portion 50 which is enlarged in diameter to form a shoulder to either face thereof.
  • the shoulder 50 has its upper surface arranged to limit against the upper abutment 29 formed on the housing 44.
  • the lower surface of shoulder portion 50 provides a limiting surface for the upper end of the spring 46.
  • the plunger 48 includes an extension 35 which projects beyond the shoulder portion 50, through the opening defined by the upper abutment 29.
  • the upper die shoe 11 is provided with apertures or recesses to form extensions of the bores 28 and 36 provided in the punch retainer plate 10 to accommodate their variously related components.
  • formed in the die shoe 11 are openings 32 positioned in correspondence with the bores 28 and forming axial extensions thereof.
  • the bore 32 is enlarged in diameter with respect to the diameter of the related bore 28 in the plate 10. This enables the bore 32 to accommodate the flange 27 on a sleeve 26 which seats to the upper surface of the plate 10 and the head 30 of the screw 25, which seats in turn to the flange 27.
  • the die shoe 11 has a series of cylindrical recesses 40 formed in the bottom thereof each of which is of like diameter and forms an axial extension with respect to a related bore 36 in the plate 10.
  • each cage 44 and the relatively projecting extension 35 of the related plunger 48 is accommodated in a recess 40.
  • the length of the spring assembly 38 will preferably be such that the projected end of plunger extension 35 will have a slight clearance at its upper surface with respect to what may be considered the bottom of the recess 40 when the die is in the open position.
  • the material of the portion 35 of the plunger 48 is such to lend itself to easy grinding whereby to make specific changes in its thickness or length, the purpose of which will be further described.
  • the upper die shoe 11 does not provide recesses to align with bores 16 in the plate 10. Thus, the bottom surface of the die shoe 11 provides for an abutting engagement therewith of the heads of the punches 20.
  • stripper plate 14 has a through bore 52 aligning with each retainer plate bore 16, adapted to receive therein the reduced diameter working extremity 22 of a punch 20. At the upper extremity thereof each bore 52 is enlarged by a counterbore to accommodate the entry therein of a portion of the shank of the related punch, in the course of a working of the die.
  • the stripper plate 14 also has an internally threaded aperture 34 arranged to align with each bore 28 formed in the plate 10. The dependent extremity of each screw 25 is threaded into an aperture 34 and the plate 14 is thereby suspended from the plate 10. Still further, the stripper plate 14 has a cylindrical recess 42 in its upper surface aligning with each bore 36 in the plate 10 to accommodate therein and seat to its base the lower extremity of a stripper spring assembly 38.
  • the matrix or die retainer plate 12 similarly has a plurality of through bores 54 respectively aligning with the bores 16 of the retainer plate 10 and with the through bores 52 of the intermediately disposing stripper plate 14. Pressed in each bore 54 is a tubular die button 58. The latter has an expanded head portion which seats in a counterbore 56 in the lower end of the particular bore in which it is placed.
  • each punch 20 is aligned with a die button 58 in the die retainer plate 12 and the head thereof is abutted to and backed by the lower die shoe.
  • the caged stripper spring assemblies (only one thereof being illustrated) are oriented similarly to the punches to have the lower end thereof seated in each case in a recess 42 in the stripper plate 14 and the vertically projected plunger portion thereof received in a recess 40 in the upper die shoe 11.
  • the head extremity of the plunger portion 35 will position with slight clearance thereabove under no load conditions as in the open position of the die.
  • hanger devices 24 (only one thereof being illustrated) will in the no load position of the parts shown in FIG. 1 have the sleeve portion 26 thereof positioned so its lower end seats freely on the top of the stripper plate as it is suspended by virtue of the flange 27 at its upper extremity seating to the top of the punch retainer plate 10.
  • the screw portion 25 of each hanger device will engage the stripper plate as described and have the head 30 thereof abutted to the flange 27 of the related sleeve.
  • the hanger devices 24 will be dimensioned correspondingly to the spring assemblies as indicated so that in an open position of the die there will be no additional load placed on the springs 46 and accordingly there will be no load or stress placed on the stripper plate 14 in an open position.
  • the built-in specific preload in the springs 46 per se determine that the stripper plate assembly will function precisely as desired in every respect.
  • the stripper plate 14 is effectively suspended from the retainer plate by hanger devices 24 with the flanged heads 27 of their sleeves 26 abutting against the upper surface of the punch retainer plate 10 to define the extent to which the stripper plate will be projected relative to plate 10. In such projected position the stripper plate will occupy a position relative to the punches to house the lower dependent working extremities 22 of the punches within the bores 52, immediately adjacent and spaced from the lower surface of the stripper plate.
  • the compression springs 46 are fully contained and their length and preload basically determined by their respective cages 44.
  • the preload effect on the springs will be such, of course, to urge their related plungers 48 axially outward and upward in each case with such motions being limited by the contact of the shoulder portion 50 with the abutment 29 formed by the inturned upper extremity of its particular cage.
  • the parts of each spring assembly as previously noted are so structured and related that with the spring 46 expanded to its allowable limits and with shoulder 50 engaging the abutment 29, the upper extremity of the plunger-portion 35 is spaced from the bottom of recess 40 thereabove a distance slightly to clear the same.
  • the punch elements will wear and their operating portions 22 must be resharpened by grinding. This naturally has the effect of shortening the overall length of the punch elements and alters the relationship between the punch elements and the stripper plate 14 with possible loss of punching or cutting effectiveness unless the position of the stripper plate is adjusted.
  • the stripper hanger devices must be adjusted to retract the stripper plate 14 in a manner to restore the original relationship between the plate and the punch elements.
  • assembly a rotary motion applied to the heads of screw means 25 will turn the latter in threaded bores in the stripper plate.
  • the screws 25 cannot be turned into the stripper plate unless there is an adjustment as to the length of the sleeves 26.
  • the sleeves 26 will be ground off at their lower end portions an amount equal to the length of material ground from the operating ends 22 of the punches 20. This will enable a precise adjustment of the stripper plate 14 on turning the screw means 25 into the stripper plate in correspondence with the adjustment of the length of the punches 20. If only this is done, the adjustment of the position of the stripper plate 14 as to its open position relative the plate 10 can obviously cause an addition to the preload on the springs 46 to thereby stress the stripper plate in the open position thereof.
  • the extensions of the plungers 48 may be easily reduced as to their length by grinding or other suitable means in correspondence with the amount of the shortening of the punches 20 and the sleeves 26.
  • sleeves 26 and extensions 35 of the plungers 48 once more we have, in a simple fashion, provided for an unstressed condition of the stripper plate 14 in the no load or open position of the die.
  • the invention stripper plate spring assemblies enable a uniform and constant loading of the contained springs in the first instance.
  • the stripper spring assemblies in accordance with the invention, will neither distort the stripper plate or unevenly stress the same.
  • load in shear on the hanger devices utilized for the stripper plate is completely avoided. This enables that a stripper plate may be suspended by relatively few hanger devices, thereby reducing machining and number of parts required for a die.
  • An ancillary advantage is the enabling of an increase in available tool area within a die. It is obvious, of course, that the involved parts will have a longer operating life.
  • spring assemblies here illustrated can be employed in a reverse or inverted position with the plunger abutting against the stripper plate without loss of effectiveness and still within the concept of the invention.
  • spring assemblies here illustrated can have a utility apart from the specific embodiment shown.
  • the assembly will have advantage in any case where safety, constant preload and adjustment without changing preload are important and necessary assets.
  • a die for use in a punch press or like equipment including a first die means providing a first die shoe to which is secured a tool retainer, a second die means providing a second die shoe to which is fixed a die plate, stripper plate means interposed between said die means and normally displaced from and mounted for movement to and from said tool retainer, work being accomplished by the die in movement of one of said die means relative the other between an open position of the die in which said tool retainer and stripper plate are displaced from each other and from said die plate and a closed position in which work is performed by tools mounted by said tool retainer, and biasing means positioned between said first die means and said stripper plate, said biasing means including compressible spring means and a cage-like housing therefor, said housing basing on said stripper plate and having a relatively reciprocable relation to said first die means and there being means responsive to relative motion of said die means in a closing movement of the die to compress said spring means independently of said housing, expansion of said spring means responsive to relative motion of said die means in an opening movement of the
  • Apparatus as in claim 1 characterized by said means to compress said spring means including means positioning, at least in part, internally of the spring means and projecting from said housing to be contacted by said first die means.
  • Apparatus as in claim 1 characterized by stripper plate mounting means including screwlike connectors suspending said stripper plate means from said first die means around the body of each of which connectors is a sleeve the length of which is governed in dimension by the desired distance between said stripper plate and said tool retainer in the open position of the die.
  • Apparatus as in claim 4 characterized by said sleeve having means at one end thereof positioning normally, in the open position of the die, on the surface of said tool retainer which is remote from the stripper plate while the body of the sleeve is adapted to project from said tool retainer to abut the surface of the stripper plate most adjacent the tool retainer, said sleeve being axially displaceable in reference to said tool retainer on the closing of said die.
  • Apparatus as in claim 8 characterized by a pin like plunger inserted within said spring means, which is coiled thereabout within said cage-like housing, having said means preventing said full axial expansion of said spring means in connection therewith.
  • Apparatus as in claim 9 characterized by said plunger having an extension normally projected in a recess in said first die means aligned with the related spring means and having the projected extremity of said extension normally spaced from the bottom of said recess when the die is in its open position.
  • Apparatus as in claim 10 characterized by said plunger extension providing means for adjustment of the assembly thereof with said spring means and the said cage therefore to readily accommodate the sharpening or adjustment or replacement of tools mounted to said tool retainer so as to maintain the pre-load condition established for said spring means to inhibit an application of stress to said stripper plate in the open position of the die.
  • stripperplate mounting means including hanger means guiding said stripper plate in relative approaching and separating motions with respect to said tool retainer of said first die means in opening and closing of the die and limiting relative separating motion, said hanger means including screw means to effect service adjustments in the projected position of said stripper plate relative to said tool retainer.
  • said cage-like housing presents an outer end portion to said first die means and confines said spring means between said outer end portion and an inner end portion based on said stripper plate means, said means to compress said spring means including a free floating plunger having a portion interposing between said spring means and said outer end portion of said housing, another portion of said plunger projecting from said outer end portion of said housing to be contacted by said first die means.
  • hanger means placing said stripper plate means in a connected relation to said first die means and limiting relative projection of the plate toward said second die means, means comprised in said hanger means to select a projected position of said stripper plate and to retract said plate relatively to said first die means to establish and maintain an operating position of said stripper plate irrespective of service adjustments, spring means for biasing said stripper plate to a projected position, cagemeans containing said spring means to establish a predetermined compression thereof which relieves said stripper plate of pressure thereon in an open position of the die while establishing and maintaining a pre-load condition of said spring means, and means, forming a reducible axial extension of said spring means and projecting beyond one end of said cage means, for obviating increases in the pre-load of said spring means in different retracted positions of said stripper plate.

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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)
US00323955A 1973-01-15 1973-01-15 Die and spring assemblies having particular application to stripper plates Expired - Lifetime US3848496A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US00323955A US3848496A (en) 1973-01-15 1973-01-15 Die and spring assemblies having particular application to stripper plates
IL43631A IL43631A0 (en) 1973-01-15 1973-11-15 Die apparatus for punch press and like equipment,including spring biased stripper plates
AU62712/73A AU6271273A (en) 1973-01-15 1973-11-20 Die and spring assemblies having particular application to stripper plates
IT53937/73A IT997671B (it) 1973-01-15 1973-11-27 Perfezionamento nei dispositivi di estrazione per presse
CA187,087A CA1003744A (en) 1973-01-15 1973-11-30 Die and spring assemblies having particular application to stripper plates
DE2361845A DE2361845A1 (de) 1973-01-15 1973-12-12 Gesenk fuer eine stanzvorrichtung
GB5853573A GB1469100A (en) 1973-01-15 1973-12-18 Die assemblies including spring strippers
JP49007489A JPS49103286A (enExample) 1973-01-15 1974-01-14
US05/499,269 US3938794A (en) 1973-01-15 1974-08-21 Caged spring unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00323955A US3848496A (en) 1973-01-15 1973-01-15 Die and spring assemblies having particular application to stripper plates

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/499,269 Division US3938794A (en) 1973-01-15 1974-08-21 Caged spring unit

Publications (1)

Publication Number Publication Date
US3848496A true US3848496A (en) 1974-11-19

Family

ID=23261436

Family Applications (1)

Application Number Title Priority Date Filing Date
US00323955A Expired - Lifetime US3848496A (en) 1973-01-15 1973-01-15 Die and spring assemblies having particular application to stripper plates

Country Status (8)

Country Link
US (1) US3848496A (enExample)
JP (1) JPS49103286A (enExample)
AU (1) AU6271273A (enExample)
CA (1) CA1003744A (enExample)
DE (1) DE2361845A1 (enExample)
GB (1) GB1469100A (enExample)
IL (1) IL43631A0 (enExample)
IT (1) IT997671B (enExample)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3901111A (en) * 1974-04-25 1975-08-26 Oberg Manufacturing Co Inc Stripper plate spring unit
US5131303A (en) * 1991-08-12 1992-07-21 Wilson Tool International Punch assembly
WO1994007663A1 (en) * 1992-10-07 1994-04-14 Wilson Tool International, Inc. Adjustable length punch set assembly
US5839341A (en) * 1996-04-12 1998-11-24 Mate Precision Tooling Punch unit
US5927140A (en) * 1997-12-16 1999-07-27 The Whitaker Corporation Tool accelerator
US6513411B2 (en) * 2000-12-20 2003-02-04 Hon Hai Precision Ind. Co., Ltd. Die block assembly with clearance protection mechanism
US6755110B2 (en) 2001-06-19 2004-06-29 Wilson Tool International, Inc. Adjustable length punch assembly
US20060191238A1 (en) * 2003-08-20 2006-08-31 Gottlieb Benz Method and device for packing tubes
CN102836922A (zh) * 2012-09-29 2012-12-26 无锡市亚青机械厂 一种装载机油罩冲孔翻边用模具
CN103480715A (zh) * 2013-09-06 2014-01-01 珠海元盛电子科技股份有限公司 预压管位成型模具
CN113210492A (zh) * 2021-05-25 2021-08-06 成都宏明双新科技股份有限公司 一种高精密产品落料及输送模具
CN114798899A (zh) * 2021-04-09 2022-07-29 王震 冲孔定位装置模具

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5560233U (enExample) * 1978-10-16 1980-04-24
JPH0452105A (ja) * 1990-06-20 1992-02-20 Ngk Insulators Ltd セラミックグリーンシート用打抜金型
JP2008290222A (ja) * 2007-05-28 2008-12-04 Kyoei Print Giken Kk プレス用コンビネーション金型
CN104338828B (zh) * 2013-08-07 2016-07-13 江苏博俊工业科技股份有限公司 小孔冲头防折断冲孔模具

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579641A (en) * 1947-10-14 1951-12-25 Motor Wheel Corp Spring unit for stripper devices
US3418839A (en) * 1965-10-22 1968-12-31 Richard E. Hlavac Stripper plate bolt assembly for a die set

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS3413828Y1 (enExample) * 1957-06-21 1959-09-03

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579641A (en) * 1947-10-14 1951-12-25 Motor Wheel Corp Spring unit for stripper devices
US3418839A (en) * 1965-10-22 1968-12-31 Richard E. Hlavac Stripper plate bolt assembly for a die set

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3901111A (en) * 1974-04-25 1975-08-26 Oberg Manufacturing Co Inc Stripper plate spring unit
US5131303A (en) * 1991-08-12 1992-07-21 Wilson Tool International Punch assembly
WO1994007663A1 (en) * 1992-10-07 1994-04-14 Wilson Tool International, Inc. Adjustable length punch set assembly
US5329835A (en) * 1992-10-07 1994-07-19 Wilson Tool International, Inc. Adjustable length punch set assembly
US5839341A (en) * 1996-04-12 1998-11-24 Mate Precision Tooling Punch unit
US5927140A (en) * 1997-12-16 1999-07-27 The Whitaker Corporation Tool accelerator
US6513411B2 (en) * 2000-12-20 2003-02-04 Hon Hai Precision Ind. Co., Ltd. Die block assembly with clearance protection mechanism
US7168356B2 (en) 2001-06-19 2007-01-30 Wilson Tool International Inc. Adjustable length punch assembly
US6755110B2 (en) 2001-06-19 2004-06-29 Wilson Tool International, Inc. Adjustable length punch assembly
US20040206223A1 (en) * 2001-06-19 2004-10-21 Wilson Tool International, Inc. Adjustable length punch assembly
US20060086230A1 (en) * 2001-06-19 2006-04-27 Wilson Tool International, Inc. Adjustable length punch assembly
US20060191238A1 (en) * 2003-08-20 2006-08-31 Gottlieb Benz Method and device for packing tubes
US7308779B2 (en) * 2003-08-20 2007-12-18 Texa Ag Method and device for packing tubes
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CN102836922B (zh) * 2012-09-29 2016-05-25 无锡市亚青机械厂 一种装载机油罩冲孔翻边用模具
CN103480715A (zh) * 2013-09-06 2014-01-01 珠海元盛电子科技股份有限公司 预压管位成型模具
CN103480715B (zh) * 2013-09-06 2015-07-22 珠海元盛电子科技股份有限公司 预压管位成型模具
CN114798899A (zh) * 2021-04-09 2022-07-29 王震 冲孔定位装置模具
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CN113210492A (zh) * 2021-05-25 2021-08-06 成都宏明双新科技股份有限公司 一种高精密产品落料及输送模具

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CA1003744A (en) 1977-01-18
AU6271273A (en) 1975-05-22
GB1469100A (en) 1977-03-30
DE2361845A1 (de) 1974-10-03
JPS49103286A (enExample) 1974-09-30
IT997671B (it) 1975-12-30
IL43631A0 (en) 1974-03-14

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