GB1010408A - Prestretched die drawing fixture for drawing die press - Google Patents

Prestretched die drawing fixture for drawing die press

Info

Publication number
GB1010408A
GB1010408A GB4455461A GB4455461A GB1010408A GB 1010408 A GB1010408 A GB 1010408A GB 4455461 A GB4455461 A GB 4455461A GB 4455461 A GB4455461 A GB 4455461A GB 1010408 A GB1010408 A GB 1010408A
Authority
GB
United Kingdom
Prior art keywords
die
bed
ram
frame
stock
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
GB4455461A
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.)
Cyril Bath Co
Original Assignee
Cyril Bath Co
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
Priority claimed from US15588A external-priority patent/US2961028A/en
Priority claimed from US76806A external-priority patent/US3113607A/en
Application filed by Cyril Bath Co filed Critical Cyril Bath Co
Publication of GB1010408A publication Critical patent/GB1010408A/en
Expired legal-status Critical Current

Links

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
    • B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
    • B21D25/02—Working sheet metal of limited length by stretching, e.g. for straightening by pulling over a die

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

1,010,408. Stamping; stretch forming. CYRIL BATH Ltd. Dec. 13, 1961 [Dec. 19, 1960], No. 44554/61. Addition to 959,093. Headings B3E and B3Q. A stretch forming fixture for a die drawing press of the kind comprising a frame structure 1, a bed or die carrying member 2 mounted thereon and a ram or second die carrying member 3 movable towards and away from said first die carrying member comprises gripping heads 31 disposed at spaced apart positions to grip opposed margins of the stocks, mounting means for said heads enabling at least one of the heads to be moved towards and away from the other by power energized driving means to tension the stock above its elastic limit before and during co-operation of the dies, said mounting means also enabling said heads to be moved in the same direction as the ram towards the bed and in timed relation with the ram or second die carrying member. Stamping dies 5 and 6 are mounted on the ram and bed respectively. Conventional reilient die cushions 7 are mounted beneath the bed 2. Each fixture comprises a frame 11 adjustably fixed to the bed 2, said frame 11 accommodating a vertically reciprocable elevator frame 12 supported on the lift rods 20 of the die cushions 7 in a predetermined position above the bed 2. Pusher posts 21 mounted on the ram engage the upper member 13 of the elevator frame and move it downwardly during the forming stroke. Each gripping head comprises an upper and lower jaw 38, 39 respectively actuated by hydraulic cylinder 44 mounted on a slide frame 30. The lower portion 32 of the slide frame comprises a plate 53 from which is suspended a body member 54 supporting hydraulic cylinders 57 actuated by a pump 69 through a reversing control valve 71 to move the gripping heads to tension or release the stock. In operation the stock is tensioned to the degree desired prior to the closure of the dies. While under tension the stock and the elevator frame is moved downwardly towards the lower die by the pusher posts on the ram. Thus the tensioned stock is laid over the lower die before or during die closure.
GB4455461A 1960-03-17 1961-12-13 Prestretched die drawing fixture for drawing die press Expired GB1010408A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15588A US2961028A (en) 1960-03-17 1960-03-17 Method and apparatus for combined stretch and die forming of metal stock
US76806A US3113607A (en) 1960-12-19 1960-12-19 Prestretch forming fixture for drawing die press

Publications (1)

Publication Number Publication Date
GB1010408A true GB1010408A (en) 1965-11-17

Family

ID=26687591

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4455461A Expired GB1010408A (en) 1960-03-17 1961-12-13 Prestretched die drawing fixture for drawing die press

Country Status (1)

Country Link
GB (1) GB1010408A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432222A (en) * 1981-02-13 1984-02-21 Nissan Motor Company, Limited Stretch drawing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432222A (en) * 1981-02-13 1984-02-21 Nissan Motor Company, Limited Stretch drawing apparatus

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