GB357328A - Improvements in or relating to presses for drawing sheet metal and the like - Google Patents
Improvements in or relating to presses for drawing sheet metal and the likeInfo
- Publication number
- GB357328A GB357328A GB2277830A GB2277830A GB357328A GB 357328 A GB357328 A GB 357328A GB 2277830 A GB2277830 A GB 2277830A GB 2277830 A GB2277830 A GB 2277830A GB 357328 A GB357328 A GB 357328A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- pressure
- piston
- air pressure
- tank
- 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
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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/02—Die-cushions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Edible Seaweed (AREA)
- Press Drives And Press Lines (AREA)
- Automatic Assembly (AREA)
Abstract
357,328. Cupping. FITZPATRICK, H. D., 94, Hope Street, Glasgow.-(Marquette Tool & Manufacturing Co. ; 1900, North Kilbourn Avenue, Chicago, U.S.A.) July 29, 1930, No. 22778. [Class 83 (iv).] The work-holder 22 of a press is supported by liquid pressure on a piston 18, the downward movement of which builds up a pressure to unseat a valve 39 and allow liquid to flow back to a tank 32 which is under air pressure, and at the end of the working stroke a rod 49 connected to the ram crank turns a valve 55, Fig. 3, to admit air pressure to lift valve 38 and allow liquid to be forced back from tank 32, through the valve 38 and one-way valve 37 to the piston 18 to raise the pad 22 and strip the work. The escape pressure on the valve 39 is set by the regulator 47 and acts through the cylinder 40 sliding over the fixed piston 45. The valve 38 is pressed down on its seat again by a spring 63 when the rod 49 again moves valve 55 to turn off the air pressure and allows cylinder 62 to exhaust through the pipes 61, 66 to atmosphere. In a modification the crank shaft 5 is provided with a cam wheel which operates the fluid pressure control valve through rocking tappets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2277830A GB357328A (en) | 1930-07-29 | 1930-07-29 | Improvements in or relating to presses for drawing sheet metal and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2277830A GB357328A (en) | 1930-07-29 | 1930-07-29 | Improvements in or relating to presses for drawing sheet metal and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB357328A true GB357328A (en) | 1931-09-24 |
Family
ID=10184920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2277830A Expired GB357328A (en) | 1930-07-29 | 1930-07-29 | Improvements in or relating to presses for drawing sheet metal and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB357328A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0531141A1 (en) * | 1991-09-04 | 1993-03-10 | Toyota Jidosha Kabushiki Kaisha | Hydraulic cushioning system for press, having shut-off valve for disconnection of pressure-pin cylinders from power supply upon contact of movable die with workpiece |
-
1930
- 1930-07-29 GB GB2277830A patent/GB357328A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0531141A1 (en) * | 1991-09-04 | 1993-03-10 | Toyota Jidosha Kabushiki Kaisha | Hydraulic cushioning system for press, having shut-off valve for disconnection of pressure-pin cylinders from power supply upon contact of movable die with workpiece |
| US5295383A (en) * | 1991-09-04 | 1994-03-22 | Toyota Jidosha Kabushiki Kaisha | Hydraulic cushioning system for press, having shut-off valve for disconnection of pressure-pin cylinders from power supply upon contact of movable die with workpiece |
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