USRE29958E - Punch and stripper assembly - Google Patents
Punch and stripper assembly Download PDFInfo
- Publication number
- USRE29958E USRE29958E US05/860,399 US86039977A USRE29958E US RE29958 E USRE29958 E US RE29958E US 86039977 A US86039977 A US 86039977A US RE29958 E USRE29958 E US RE29958E
- Authority
- US
- United States
- Prior art keywords
- punch
- sleeve
- retainer
- washer
- spring
- 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
Links
- 230000036316 preload Effects 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims description 11
- 238000004080 punching Methods 0.000 claims description 5
- 230000000717 retained effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Images
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
- B21D28/346—Perforating tools; Die holders length adjustable perforating tools
-
- 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
- Y10T83/2159—By spring means
-
- 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
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8776—Constantly urged tool or tool support [e.g., spring biased]
- Y10T83/8785—Through return [noncutting] stroke
Definitions
- This invention relates to a punch and stripper assembly for use in press-type of machine tools.
- the punch and stripper assembly of the invention includes a punch having an intermediate shoulder, an enlarged head threaded on an end of the punch, a compression spring which is preloaded by the adjustment of the head which engages the ram, the other end of the spring being engaged by a washer, a retainer acting between the punch shoulder and the washer, and a stripper sleeve for acting between the workpiece and the retainer.
- the retainer is a split ring having separate sections retained together by being at least partially disposed in a counterbore in the washer.
- the retainer preferably includes a cylindrical projection so that when the retainer is inverted, the effective position of the punch is altered.
- Another object of the present invention is to provide a punch and stripper assembly having a preloaded stripping spring.
- Another object of the present invention is to provide a punch and stripper assembly wherein its effective length or envelope size can be adjustably controlled.
- a still further object of the present invention is to provide a punch and stripper assembly which can be assembled and disassembled without use of special tools even though the stripping spring is preloaded.
- Yet another object of the present invention is to provide a punch and stripper assembly wherein effective length thereof can be controlled even though there has been considerable shortening of the punch as a consequence of regrinding to sharpen the punch.
- FIG. 1 is a cross-sectional view of punch and stripper assembly provided in accordance with the present invention
- FIG. 2 is a similar view of the punch and stripper assembly of FIG. 1, but shown after having been readjusted as a consequence of punch sharpening;
- FIG. 3 is a plan view of the device shown in FIGS. 1 and 2;
- FIGS. 4 and 5 are elevational views of modified forms of the part shown in FIG. 3.
- a device or assembly of this type can be used in numerous types of punch presses such as turret presses, single station presses, and sub-press tooling.
- a punch ram acts on the upper end of the punch and stripper assembly 10 to force it against a workpiece (not shown), a reactive force being provided by a suitable die (not shown) disposed on the opposite side of the workpiece, all as is well known.
- some type of lifting means is employed, schematically indicated by a springloaded adapter II which holds the punch and stripper assembly 10 in an elevated position after the ram has retracted therefrom in its return stroke.
- the punch and stripper assembly 10 includes a punch 12 having one end 13 adapted for cutting or forming, and thus for coacting with the die.
- the punch 12 has an enlarged intermediate body portion 14 by which the punch is guided during reciprocation, there being a shoulder 15 which faces away from the end 13 and from which a reduced diameter portion 16 extends.
- the upper end of the punch 12 is a threaded end portion 17, there being a second shoulder 18 facing away from the cutting end 13.
- An enlarged head 19 is threaded and is carried on the threaded end portion 17, it having an upper surface 20 which is directed to be engaged by the ram.
- a set screw 21 is carried by the head 19 for acting against the punch 12 to hold the head 19 in a selected position.
- the head 19 has a pair of oppositely facing flat surfaces 22 which facilitate the selective positioning of the head 19 on the punch 12.
- a compression spring 23 has an upper end which engages the lower surface of the head 19, the lower end of the spring 23 engaging against a washer 24 which has a bore 25 and a counterbore 26.
- a retainer 27 acts between the punch shoulder 15 and the washer 24, and such engagement is maintained at all times by the force from the spring 23.
- the retainer 27 comprises a split ring that has a pair of separate sections 28, 29, best seen in FIG. 3, which, as shown in FIG. 1 extend at least partially into the counterbore 26 in the washer 24. As shown in FIGS. 1 and 3, the retainer 27 has a cylindrical projection 30 which extends into the bore 25.
- the assembly 10 further includes a stripper sleeve 31 which has a lower end 32 for engaging the workpiece and which surrounds the end portion 13 of the punch 12. At its upper end 33, the sleeve 31 engages the retainer 27. Adjacent to the end 33, the sleeve 31 has a groove in which a second retainer 34 is disposed.
- the second retainer 34 is in the form of a wire spring which substantially encircles the sleeve 31, the retainer 34 having one end 35 that extends through an opening in the sleeve 31.
- the end 35 of the retainer 34 acts against the shoulder 18 to hold the assembly in assembled relationship.
- the retainer 34 thus firmly engages and encircles the sleeve 31 adjacent to the first retainer 27 and provides a means against which a lifting force can be applied to the assembly 10.
- the assembly is put together in the following manner: The head 19 is threaded onto the end portion 17 of the punch 12 with only approximately two threads engaging. The spring 23 is then slipped on as is the washer 24. The retainer 27 is then put into position about the reduced diameter portion 16, the washer 24 then being disposed nearer the upper end of the punch. The head 19 is then tightened which can be done by hand or with the assistance of a non-special hand tool, and the tightening is continued until the upper end of the punch 12 almost reaches the upper surface 20 of the head 19. The is the position illustrated in FIG. 1. The stripper sleeve 31 is then slipped over the other end of the punch, and then the second or spring retainer 34 is snapped into position. The assembly 10 is then ready for use in a punch press.
- the assembly is assembled with ease and it has a predetermined length, thus facilitating its use in presses where the length must be accurately established.
- the spring 23 is preloaded, maximum spring-life is obtained.
- a split retainer 36 (FIG. 4) may be utilized. Prior to assembly, the retainer 36 has an open gap that permits it to be passed over the reduced diameter portion 16 of the punch 12. Thereafter, the retainer 36 is deformed so that it has a sliding fit with the portion 16. Normally the retainer 36 is not thereafter removed from the punch 12.
- retainer 37 in FIG. 5 Another form of retainer is shown at 37 in FIG. 5.
- the retainer is in the form of a solid ring which had an initial diameter such that it could be slipped over one of the ends of the punch 12. After it is in a position of registration with the reduced diameter portion 16, it too is deformed, as by swagging, to be permanently carried on the punch 12.
- the punch 12 when new, will enter a new die by 0.062 inches.
- the tip 13 will need to be sharpened, and thus shortened by whatever length is ground off.
- the head 19 can be backed off by a corresponding amount, thus maintaining the effective length of the punch.
- the head can be backed off only so much from the initial illustrated position, 0.053 inch being a typical maximum amount. Assuming that 0.053 inch has been ground off, the head 19 is then backed off a corresponding amount. However, this amount, the maximum permitted by the ram location, still provides 0.072 inch preload on the spring.
- FIG. 2 illustrates the same assembly adjusted for a punch that has had its first maximum grinding increment removed.
- the cylindrical projection 30 then exceeds into the sleeve 31 so that the shoulder 15 is arrested that much sooner.
- the upper end 33 of the sleeve 31 still engages the retainer 27 at a point which is substantially flush with the bottom of the washer 24.
- FIG. 2 shows the punch tip 13 that has been shortened and shows the head 19 backed off the threaded end portion 17 by a corresponding amount.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Forging (AREA)
Abstract
Description
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/709,338 US4031787A (en) | 1976-07-28 | 1976-07-28 | Punch and stripper assembly |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/709,338 Reissue US4031787A (en) | 1976-07-28 | 1976-07-28 | Punch and stripper assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE29958E true USRE29958E (en) | 1979-04-10 |
Family
ID=24849438
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/709,338 Expired - Lifetime US4031787A (en) | 1976-07-28 | 1976-07-28 | Punch and stripper assembly |
US05/860,399 Expired - Lifetime USRE29958E (en) | 1976-07-28 | 1977-12-14 | Punch and stripper assembly |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/709,338 Expired - Lifetime US4031787A (en) | 1976-07-28 | 1976-07-28 | Punch and stripper assembly |
Country Status (8)
Country | Link |
---|---|
US (2) | US4031787A (en) |
JP (1) | JPS5315685A (en) |
CA (1) | CA1063924A (en) |
CH (1) | CH611540A5 (en) |
DE (1) | DE2718766C3 (en) |
DK (1) | DK147699C (en) |
FR (1) | FR2359657A1 (en) |
GB (1) | GB1536992A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060060046A1 (en) * | 2004-09-22 | 2006-03-23 | Fumitaka Sugizaki | Biasing assembly for a punching device |
US20070034069A1 (en) * | 2005-07-04 | 2007-02-15 | Amada Company, Limited | Upper tool device and punch therefor |
US7338494B2 (en) | 2003-08-19 | 2008-03-04 | Synthes (U.S.A.) | Spring-loaded awl |
US20080236356A1 (en) * | 2007-04-02 | 2008-10-02 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Punching device |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4141264A (en) * | 1977-06-02 | 1979-02-27 | Unipunch Products, Inc. | Adjustable high speed punch |
US4092888A (en) * | 1977-07-01 | 1978-06-06 | Wilson Tool Company | Self-stripping punch and guide assembly |
US4261237A (en) * | 1979-03-16 | 1981-04-14 | Houdaille Industries, Inc. | Rigidly supported molded plastics material punch guide and stripper |
GB2066412B (en) * | 1979-12-26 | 1984-06-27 | Houdaille Industries Inc | Punch press assembly including a preloaded encapsulated spring and method of manufacture |
US4375774A (en) * | 1979-12-26 | 1983-03-08 | Wilson Tool Company | Adjustable punch head |
DE3227696A1 (en) * | 1982-07-24 | 1984-02-02 | Bernhard Guglhör Präzisionsteile GmbH & Co, 8959 Buching | Progressive compound die |
JPS6246144U (en) * | 1985-09-09 | 1987-03-20 | ||
JPS62146534U (en) * | 1986-03-11 | 1987-09-16 | ||
JPH0527218Y2 (en) * | 1988-02-09 | 1993-07-12 | ||
US5131303A (en) * | 1991-08-12 | 1992-07-21 | Wilson Tool International | Punch 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 |
JP2002059223A (en) * | 2000-08-14 | 2002-02-26 | Miyako Seisakusho:Kk | Apparatus for delaying waste of replaceable cutter |
US6755110B2 (en) * | 2001-06-19 | 2004-06-29 | Wilson Tool International, Inc. | Adjustable length punch assembly |
US6782787B2 (en) | 2001-08-02 | 2004-08-31 | Wilson Tool International, Inc. | Adjustable punch having externally accessible rotation release latch |
US8146399B2 (en) * | 2008-02-04 | 2012-04-03 | Standard Lifters, Inc. | Modular spring retainer and method for metal forming dies and the like |
DE202009004013U1 (en) * | 2009-03-25 | 2009-06-10 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Shim for balancing a regrind length |
US8413561B2 (en) * | 2009-11-10 | 2013-04-09 | Mate Precision Tooling, Inc. | Multiple punch and die assembly |
US20130047808A1 (en) * | 2011-08-23 | 2013-02-28 | Mate Precision Tooling Inc. | Punching and Forming Lubrication System and Lubricant Retention Matrix |
CN102500717A (en) * | 2011-10-20 | 2012-06-20 | 奇瑞汽车股份有限公司 | Ejection device |
DE102012014698B4 (en) * | 2012-04-03 | 2014-07-03 | Julia Vanderpool | Stamp unit and system for constructing stamp units |
CN106514268B (en) * | 2016-12-06 | 2019-01-11 | 安徽中意机床制造有限公司 | A kind of hydraulic combined punching & shearing machine that binder effect is good |
WO2018208867A1 (en) * | 2017-05-08 | 2018-11-15 | Mcgarity Bennie Carroll | Adjustable hole punch system for installation of standing seam type roofing |
CN107377803A (en) * | 2017-09-02 | 2017-11-24 | 安徽海拓志永智能装备股份有限公司 | Suitable for the stripper apparatus of forcing press stamped workpieces |
US11707775B2 (en) | 2018-12-27 | 2023-07-25 | Standard Lifters, Inc. | Stock lifter assembly |
US11267036B2 (en) | 2018-12-27 | 2022-03-08 | Standard Lifters, Inc. | Stock lifter assembly |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3342091A (en) * | 1960-11-01 | 1967-09-19 | Houdaille Industries Inc | Punching machine with selective angularly adjustable punch and die set |
US3935771A (en) * | 1975-02-10 | 1976-02-03 | Houdaille Industries, Inc. | Punch and stripping guide assembly |
US3935772A (en) * | 1975-03-21 | 1976-02-03 | Houdaille Industries, Inc. | Punching device having selectable pinch point clearance |
US3958476A (en) * | 1975-06-30 | 1976-05-25 | Houdaille Industries, Inc. | Punching device with punch retainer |
-
1976
- 1976-07-28 US US05/709,338 patent/US4031787A/en not_active Expired - Lifetime
-
1977
- 1977-02-23 GB GB7619/77A patent/GB1536992A/en not_active Expired
- 1977-02-25 CA CA272,654A patent/CA1063924A/en not_active Expired
- 1977-02-28 DK DK87777A patent/DK147699C/en not_active IP Right Cessation
- 1977-03-18 JP JP3026677A patent/JPS5315685A/en active Pending
- 1977-03-23 FR FR7708719A patent/FR2359657A1/en active Granted
- 1977-04-01 CH CH410777A patent/CH611540A5/xx not_active IP Right Cessation
- 1977-04-27 DE DE2718766A patent/DE2718766C3/en not_active Expired
- 1977-12-14 US US05/860,399 patent/USRE29958E/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3342091A (en) * | 1960-11-01 | 1967-09-19 | Houdaille Industries Inc | Punching machine with selective angularly adjustable punch and die set |
US3935771A (en) * | 1975-02-10 | 1976-02-03 | Houdaille Industries, Inc. | Punch and stripping guide assembly |
US3935772A (en) * | 1975-03-21 | 1976-02-03 | Houdaille Industries, Inc. | Punching device having selectable pinch point clearance |
US3958476A (en) * | 1975-06-30 | 1976-05-25 | Houdaille Industries, Inc. | Punching device with punch retainer |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7338494B2 (en) | 2003-08-19 | 2008-03-04 | Synthes (U.S.A.) | Spring-loaded awl |
US20060060046A1 (en) * | 2004-09-22 | 2006-03-23 | Fumitaka Sugizaki | Biasing assembly for a punching device |
US7698979B2 (en) | 2004-09-22 | 2010-04-20 | Amada Tool America, Inc. | Biasing assembly for a punching device |
US20100095825A1 (en) * | 2004-09-22 | 2010-04-22 | Amada Tool America, Inc. | Biasing assembly for a punching device |
US9469043B2 (en) | 2004-09-22 | 2016-10-18 | Amada Tool America, Inc. | Biasing assembly for a punching device |
US20070034069A1 (en) * | 2005-07-04 | 2007-02-15 | Amada Company, Limited | Upper tool device and punch therefor |
US20080202307A1 (en) * | 2005-07-04 | 2008-08-28 | Amada Company, Limited | Upper tool device and punch therefor |
US7802506B2 (en) * | 2005-07-04 | 2010-09-28 | Amada Company, Limited | Upper tool device and punch therefor |
US7958807B2 (en) * | 2005-07-04 | 2011-06-14 | Amada Company Limited | Upper tool device and punch therefor |
US20080236356A1 (en) * | 2007-04-02 | 2008-10-02 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Punching device |
Also Published As
Publication number | Publication date |
---|---|
CA1063924A (en) | 1979-10-09 |
DK147699C (en) | 1985-07-15 |
CH611540A5 (en) | 1979-06-15 |
DK87777A (en) | 1978-01-29 |
JPS5315685A (en) | 1978-02-13 |
FR2359657B1 (en) | 1982-01-22 |
FR2359657A1 (en) | 1978-02-24 |
GB1536992A (en) | 1978-12-29 |
US4031787A (en) | 1977-06-28 |
DE2718766C3 (en) | 1979-12-13 |
DE2718766A1 (en) | 1978-02-02 |
DE2718766B2 (en) | 1979-04-19 |
DK147699B (en) | 1984-11-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: STRIPPIT/DI-ACRO - HOUDAILLE, INC. 12975 CLARENCE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HOUDILLE INDUSTRIES, INC., A CORP OF DE;REEL/FRAME:004381/0716 Effective date: 19850121 |
|
AS | Assignment |
Owner name: STRIPPIT-HOUDAILLE, INC., 12975 CLARENCE CENTER RO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:STRIPPIT/DI-ACRO-HOUDAILLE, INC., A DE. CORP.;REEL/FRAME:004660/0022 Effective date: 19861208 Owner name: STRIPPIT-HOUDAILLE, INC., A DE. CORP.,NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STRIPPIT/DI-ACRO-HOUDAILLE, INC., A DE. CORP.;REEL/FRAME:004660/0022 Effective date: 19861208 |
|
AS | Assignment |
Owner name: STRIPPIT, INC. Free format text: CHANGE OF NAME;ASSIGNOR:STRIPPIT-HOUDAILLE, INC.;REEL/FRAME:006243/0001 Effective date: 19880323 |
|
AS | Assignment |
Owner name: LASALLE NATIONAL BANK, ILLINOIS Free format text: SECURITY AGREEMENT;ASSIGNOR:STRIPPIT, INC.;REEL/FRAME:009445/0042 Effective date: 19980825 |
|
AS | Assignment |
Owner name: LASALLE BUSINESS CREDIT, INC., ILLINOIS Free format text: CHANGE OF SECURED PARTY;ASSIGNOR:LASALLE BANK NATIONAL ASSOCIATION (FORMERLY KNOWN AS LASALLE NATIONAL BANK);REEL/FRAME:012559/0012 Effective date: 20011212 |