GB1311681A - Punching and stripping mechanism - Google Patents

Punching and stripping mechanism

Info

Publication number
GB1311681A
GB1311681A GB1873470A GB1873470A GB1311681A GB 1311681 A GB1311681 A GB 1311681A GB 1873470 A GB1873470 A GB 1873470A GB 1873470 A GB1873470 A GB 1873470A GB 1311681 A GB1311681 A GB 1311681A
Authority
GB
United Kingdom
Prior art keywords
punch
cylinder
workpiece
stripper
valve
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
Application number
GB1873470A
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.)
PIERCE ALL Manufacturing Ltd
Original Assignee
PIERCE ALL Manufacturing Ltd
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 PIERCE ALL Manufacturing Ltd filed Critical PIERCE ALL Manufacturing Ltd
Publication of GB1311681A publication Critical patent/GB1311681A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D45/00Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/003Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
    • B21D45/006Stripping-off devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/24Perforating, i.e. punching holes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D15/00Shearing machines or shearing devices cutting by blades which move parallel to themselves
    • B23D15/12Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
    • B23D15/14Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)

Abstract

1311681 Punching; strippers PIERCE-ALL MFG Ltd 20 April 1970 [5 May 1969] 18734/70 Heading B3W Hydraulic fluid is supplied to a punch cylinder 1 and 16 a cylinder 5 of a piston 7 driving a spring-biased hold down and stripper member 3 via an adjustable valve 10, 11 with flow and return connections 13 and 15 respectively to a supply tank (not shown). A flow restrictor 20 is provided in the conduit 19 leading to the upper end of the cylinder 1 and a check valve 22-24 in the line 21 leading to the stripper cylinder 5. A return line to the tank has a control valve 27, 28 therein. To initiate a punching operation the valve rotor 11 is moved to the Fig. 2 position in which fluid is supplied to the upper ends of cylinders 1 and 5, the flow restrictor 20 causing greater flow to the stripper cylinder 5 so that the stripper member 3 holds a workpiece 34 against a press table 35 before the punch enters the workpiece. For the return stroke, the rotor 11 is rotated to a position in which fluid is supplied only to the underside of punch piston 8. Due to the check valve 22-24 pressure in the stripper cylinder is maintained until, after the punch has been removed from the workpiece, the valve 27, 28 is opened by, e.g. electrical means including limit switches or through a releasable mechanical coupling (29), (30), Fig. 1 (not shown), with the punch piston-rod 9. The spring 4 raises the stripper member 3 and the valve 27, 28 is closed. Alternatively, the stripper member 3 can be raised hydraulically and/or the punch by spring pressure. The flow restrictor may be omitted, the increase in resistance to the punch before workpiece penetration ensuring sufficient pressure for the stripper member 3 to engage the workpiece before the punch enters the workpiece. Alternatively, the volume of the cylinder 1 and the size of conduit 19 may be selected to ensure that the stripper member 3 engages the workpiece before or at approximately the same moment as the punch 2.
GB1873470A 1969-05-05 1970-04-20 Punching and stripping mechanism Expired GB1311681A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA50525 1969-05-05

Publications (1)

Publication Number Publication Date
GB1311681A true GB1311681A (en) 1973-03-28

Family

ID=4085210

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1873470A Expired GB1311681A (en) 1969-05-05 1970-04-20 Punching and stripping mechanism

Country Status (4)

Country Link
AU (1) AU1417570A (en)
DE (1) DE2021766A1 (en)
FR (1) FR2047254A5 (en)
GB (1) GB1311681A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120031245A1 (en) * 2009-04-15 2012-02-09 Amada Company, Limited Punch tool device and method of supplying lubricating oil

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7501729A (en) * 1975-02-14 1976-08-17 Perswerk De Jong B V PROCESS FOR CONVERTING A SINGLE PRESSURE FORCE INTO SEPARATE PRESSURE FORCES, AS WELL AS A DEVICE FOR PERFORMING THE PROCEDURE.
FR2487703B1 (en) * 1980-07-31 1986-02-21 Cecchi Gerard IMPROVED PUNCHING MACHINE
FR2560080B1 (en) * 1984-02-24 1986-06-27 Grangier Hubert PUNCHING MACHINE, ESPECIALLY FOR PERFORATING OR CUTTING ENCLOSURES OR HOUSINGS
US4631996A (en) * 1985-10-28 1986-12-30 Peddinghaus Corporation Punch press with self-adjusting stripper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120031245A1 (en) * 2009-04-15 2012-02-09 Amada Company, Limited Punch tool device and method of supplying lubricating oil
US9669450B2 (en) * 2009-04-15 2017-06-06 Amada Company, Limited Punch tool device and method of supplying lubricating oil

Also Published As

Publication number Publication date
FR2047254A5 (en) 1971-03-12
AU1417570A (en) 1971-10-28
DE2021766A1 (en) 1970-11-19

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees