GB1122867A - Improvements in stretch draw forming - Google Patents
Improvements in stretch draw formingInfo
- Publication number
- GB1122867A GB1122867A GB3051966A GB3051966A GB1122867A GB 1122867 A GB1122867 A GB 1122867A GB 3051966 A GB3051966 A GB 3051966A GB 3051966 A GB3051966 A GB 3051966A GB 1122867 A GB1122867 A GB 1122867A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- jaws
- grippers
- dies
- tension
- 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
- 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
-
- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
1,122,867. Stretch - forming; shearing. JOSHUA BIGWOOD & SON Ltd. 30 June, 1967 [7 July, 1966], No. 30519/66. Headings B3E, B3Q and B3W. A method of stretch-draw forming continuous strip metal 11 comprises feeding the strip between a pair of tensioning means 19, 20 one on each side of a pair of drawing dies 15, 17, tensioning the portion of strip between the means 19, 20 beyond its elastic limit, drawing the portion between the dies to form an article, releasing the tensioning means and freeing the portion from the dies, then moving the strip to feed a further portion between the dies and carry the formed portion beyond the tensioning means 20 so that it may be cut from the remainder of the strip, and continuously repeating the above steps. A coil-breaker 12, which may shape the strip transversely, is disposed between a reel 10 of the strip and the intake gripper 19. The grippers 19, 20 may be as described in Specification 893,001, or have jaws as described in Specifications 809,619, 739,291 and 614,186. As shown, the jaws 21 of gripper 19 are closed hydraulically, along inclined guides 21a, those of gripper 20 being operated hydraulically in a direction perpendicular to the strip. Both sets of jaws 21, 22 are moved apart by fluid-pressure cylinders 28 to tension the strip, and are then lowered, by cylinders 27, to wrap the strip around the lower die 15. Instead of moving the jaws hydraulically, they may be operated by other means, and at least one rib (25), Fig. 2 (not shown), and a co-operating groove (26) are provided on the jaws 22. Operation.-After tensioning the strip, the tension is reduced to a value still above the elastic limit before the grippers are lowered. The upper die is now lowered, strip-tension preferably being kept constant by the escape of fluid from the cylinders 28. After releasing the tension, raising the top-die 17 and the grippers and opening the grippers, a pull-out device 31 is inserted between shear blades 30 to grip the end of the strip and pull the worked part of the strip on to a conveyer 32 for removal after operation of the shear, which may have two pairs of blades, one for severing each side of a gripped zone of the strip.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3051966A GB1122867A (en) | 1966-07-07 | 1966-07-07 | Improvements in stretch draw forming |
| BE701100D BE701100A (en) | 1966-07-07 | 1967-07-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3051966A GB1122867A (en) | 1966-07-07 | 1966-07-07 | Improvements in stretch draw forming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1122867A true GB1122867A (en) | 1968-08-07 |
Family
ID=10308941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3051966A Expired GB1122867A (en) | 1966-07-07 | 1966-07-07 | Improvements in stretch draw forming |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE701100A (en) |
| GB (1) | GB1122867A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114514080A (en) * | 2019-10-11 | 2022-05-17 | Sms集团有限公司 | Device for drawing a metal blank in the form of a single sheet along a drawing line with a drawing frame and method for drawing a metal blank using said device |
| US12121951B2 (en) | 2019-10-11 | 2024-10-22 | Sms Group Gmbh | Device for stretching a metal semi-finished product in the form of individual plates along a stretching section with a stretching frame, and method for stretching a metal semi-finished product using the device |
-
1966
- 1966-07-07 GB GB3051966A patent/GB1122867A/en not_active Expired
-
1967
- 1967-07-07 BE BE701100D patent/BE701100A/xx unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114514080A (en) * | 2019-10-11 | 2022-05-17 | Sms集团有限公司 | Device for drawing a metal blank in the form of a single sheet along a drawing line with a drawing frame and method for drawing a metal blank using said device |
| US12121951B2 (en) | 2019-10-11 | 2024-10-22 | Sms Group Gmbh | Device for stretching a metal semi-finished product in the form of individual plates along a stretching section with a stretching frame, and method for stretching a metal semi-finished product using the device |
Also Published As
| Publication number | Publication date |
|---|---|
| BE701100A (en) | 1967-12-18 |
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