GB572497A - Improvements in or relating to drawbenches and like apparatus - Google Patents

Improvements in or relating to drawbenches and like apparatus

Info

Publication number
GB572497A
GB572497A GB515944A GB515944A GB572497A GB 572497 A GB572497 A GB 572497A GB 515944 A GB515944 A GB 515944A GB 515944 A GB515944 A GB 515944A GB 572497 A GB572497 A GB 572497A
Authority
GB
United Kingdom
Prior art keywords
lever
carriage
valve
air
piston
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
GB515944A
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.)
NORTHERN ALUMINIUM Co Ltd
Original Assignee
NORTHERN ALUMINIUM Co 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 NORTHERN ALUMINIUM Co Ltd filed Critical NORTHERN ALUMINIUM Co Ltd
Priority to GB515944A priority Critical patent/GB572497A/en
Publication of GB572497A publication Critical patent/GB572497A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/27—Carriages; Drives
    • B21C1/30—Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)

Abstract

572,497. Drawing. NORTHERN ALUMINIUM CO., Ltd., and SHEPHERD, L.G. March 20, 1944, No. 5159. [Class 83 (iv)] A draw-bench carriage is provided with means for cushioning the end of the return stroke and for ensuring that the tongs grip the work securely at the start of the next drawing operation. A roller 7 on the carriage engages the slotted end of a lever 1 pivoted at 3, towards the end of the return stroke. The lever is linked to a cross-head 10 on the rod 12 of a piston 13. Escape of air from behind the piston is controlled by an adjustable needle valve 15 according to the amount of cushioning desired. During movement of the lever 1, an adjustable cam 16 on it operates a lever, allowing an exhaust valve 18 for the other end of the cylinder 14 to close and opening a pressure supply valve 19. Pressure air does not, however, pass until a treadle-operated valve 24 is also opened. The carriage comes to rest with the lever 1 resting against a spring buffer 22, and the valve 24 is now operated, admitting air at 25 to means for pushing forward a new tube and mandrel so that the tag end passes through the die. At the same time pressure behind the piston 13 forces the lever 1 and consequently the carriage further back towards the die, compressing the buffer spring and bringing the trip rod 26 for the hook into contact with a stop 27, thereby permitting the hook to engage the chain. The drawing stroke of the carriage commences against the resistance of the lever 1 due to the air pressure in. the cylinder 14 and this ensures that the tongs take an immediate grip upon the tube. The carriage is constructed as described in Specification 572,429.
GB515944A 1944-03-20 1944-03-20 Improvements in or relating to drawbenches and like apparatus Expired GB572497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB515944A GB572497A (en) 1944-03-20 1944-03-20 Improvements in or relating to drawbenches and like apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB515944A GB572497A (en) 1944-03-20 1944-03-20 Improvements in or relating to drawbenches and like apparatus

Publications (1)

Publication Number Publication Date
GB572497A true GB572497A (en) 1945-10-10

Family

ID=9790797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB515944A Expired GB572497A (en) 1944-03-20 1944-03-20 Improvements in or relating to drawbenches and like apparatus

Country Status (1)

Country Link
GB (1) GB572497A (en)

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