GB1353992A - Stretch-forging apparatus - Google Patents
Stretch-forging apparatusInfo
- Publication number
- GB1353992A GB1353992A GB1737771A GB1737771A GB1353992A GB 1353992 A GB1353992 A GB 1353992A GB 1737771 A GB1737771 A GB 1737771A GB 1737771 A GB1737771 A GB 1737771A GB 1353992 A GB1353992 A GB 1353992A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jaws
- workpiece
- stretch
- allow
- shaped
- 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
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
- B21J7/02—Special design or construction
- B21J7/18—Forging machines working with die jaws, e.g. pivoted, movable laterally of the forging or pressing direction, e.g. for swaging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
1353992 Forging; making tubes F KOCKS 27 May 1971 [22 June 1970] 17377/71 Addition to 1335611 Headings B3H and B3A A stretch forging machine has a set of swing- ing jaws arranged to be driven by crank or eccentric drive and the working surfaces of the jaws are shaped to define a closed sizing gap when the jaws are closed together. The gap is shaped to allow the workpiece to flow radially over part of its surface in the entry zone of the gap. In one embodiment with four jaws 2a, Fig. 6, the jaws have a transverse curvature in the initial zone whose radius R 1 is greater than the distance A from the jaw surface to the workpiece axis. Thus the jaws contact the workpiece centrally and allow it to broaden. In a second embodiment, Fig. 7, the said distance is equal to the curvature R 2 of the jaw surface, however, the edge zones T 1 , T 2 are straight to allow the workpiece to broaden. The working surfaces of the jaws gradually change, Figs. 2-5 (not shown), so that at the exit zone they define a circular bore. The workpiece is rotated after each forging stroke. The tube reduced by the stretch forging machine may be subsequently stretch rolled. The working surfaces of the jaws are shaped by machining. Specification 1,353,993 is directed to the machining of the jaws.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702030607 DE2030607C3 (en) | 1970-06-22 | 1970-06-22 | Device for stretch forging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1353992A true GB1353992A (en) | 1974-05-22 |
Family
ID=5774572
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1353993D Expired GB1353993A (en) | 1970-06-22 | 1971-05-27 | Machining apparatus for machining the jaws of stretchforging apparatus |
| GB1737771A Expired GB1353992A (en) | 1970-06-22 | 1971-05-27 | Stretch-forging apparatus |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1353993D Expired GB1353993A (en) | 1970-06-22 | 1971-05-27 | Machining apparatus for machining the jaws of stretchforging apparatus |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE2030607C3 (en) |
| GB (2) | GB1353993A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3917398A1 (en) * | 1989-05-29 | 1990-12-06 | Schloemann Siemag Ag | FLYING PRESS |
-
1970
- 1970-06-22 DE DE19702030607 patent/DE2030607C3/en not_active Expired
-
1971
- 1971-05-27 GB GB1353993D patent/GB1353993A/en not_active Expired
- 1971-05-27 GB GB1737771A patent/GB1353992A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2030607C3 (en) | 1979-01-18 |
| GB1353993A (en) | 1974-05-22 |
| DE2030607A1 (en) | 1971-12-30 |
| DE2030607B2 (en) | 1978-06-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
| PCNP | Patent ceased through non-payment of renewal fee |