GB1375595A - - Google Patents
Info
- Publication number
- GB1375595A GB1375595A GB1470972A GB1470972A GB1375595A GB 1375595 A GB1375595 A GB 1375595A GB 1470972 A GB1470972 A GB 1470972A GB 1470972 A GB1470972 A GB 1470972A GB 1375595 A GB1375595 A GB 1375595A
- Authority
- GB
- United Kingdom
- Prior art keywords
- billet
- die
- extrusion
- plunger
- reaches
- 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
- 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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/007—Hydrostatic extrusion
-
- 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
- B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
- Forging (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
1375595 Extruding ALLMANNA SVENSKA ELEKTRISKA AB 29 March 1972 [30 March 1971] 14709/72 Heading B3P The complete extrusion of a billet 11 during a hydrostatic extrusion process is prevented by using a billet 11 having a rear end a harder than the remainder of the billet b and initiating a warning and/or discontinuing the process when the extrusion pressure rises which occurs when the rear billet end a reaches the extrusion die 2. The billet 11, e.g. of steel or copper alloy, having an annealed front part b and a rear part a hardened by a high frequency unit, is hydrostatically extruded through the die 2 by pressurizing castor oil in a pressure chamber 10 by means of a plunger 3. The pressure increase in the chamber 10 when the hard rear end a of the billet 11 reaches the die 2 is sensed by a sensing member communicating with the operating cylinder of the plunger 3. A visible or audible signal is initiated by the sensing member or the process is automatically discontinued when the pressure reaches a predetermined level. Seals 4, 5 are positioned between the cylinder wall and the plunger 3 and die 2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE04087/71A SE365959B (en) | 1971-03-30 | 1971-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1375595A true GB1375595A (en) | 1974-11-27 |
Family
ID=20263491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1470972A Expired GB1375595A (en) | 1971-03-30 | 1972-03-29 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US3751955A (en) |
| BE (1) | BE780055A (en) |
| CA (1) | CA955560A (en) |
| CH (1) | CH536144A (en) |
| FR (1) | FR2132174A1 (en) |
| GB (1) | GB1375595A (en) |
| IT (1) | IT961573B (en) |
| SE (1) | SE365959B (en) |
| SU (1) | SU464091A3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE383269B (en) * | 1972-09-14 | 1976-03-08 | Asea Ab | HYDROSTATIC EXTENSION PROCEDURE |
| SE371117B (en) * | 1973-03-07 | 1974-11-11 | Asea Ab | |
| SE7603002L (en) * | 1976-03-04 | 1977-09-05 | Asea Ab | METHOD FOR PLASTIC PROCESSING AT HIGH ENVIRONMENTAL PRESSURE AND EQUIPMENT FOR PERFORMING THE METHOD |
| US9700925B2 (en) * | 2015-11-04 | 2017-07-11 | Vahid Shatermashhadi | System and method for hydrostatic backward extrusion |
-
1971
- 1971-03-30 SE SE04087/71A patent/SE365959B/xx unknown
-
1972
- 1972-02-16 US US00226719A patent/US3751955A/en not_active Expired - Lifetime
- 1972-03-01 BE BE780055A patent/BE780055A/en unknown
- 1972-03-22 CH CH430572A patent/CH536144A/en not_active IP Right Cessation
- 1972-03-24 SU SU1764962A patent/SU464091A3/en active
- 1972-03-28 CA CA138,380A patent/CA955560A/en not_active Expired
- 1972-03-29 GB GB1470972A patent/GB1375595A/en not_active Expired
- 1972-03-29 IT IT67995/72A patent/IT961573B/en active
- 1972-03-29 FR FR7211019A patent/FR2132174A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CH536144A (en) | 1973-04-30 |
| US3751955A (en) | 1973-08-14 |
| CA955560A (en) | 1974-10-01 |
| SU464091A3 (en) | 1975-03-15 |
| BE780055A (en) | 1972-07-07 |
| DE2214823A1 (en) | 1972-10-12 |
| DE2214823B2 (en) | 1976-12-09 |
| SE365959B (en) | 1974-04-08 |
| FR2132174A1 (en) | 1972-11-17 |
| IT961573B (en) | 1973-12-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |