JPS6453719A - Production of bend pipe - Google Patents
Production of bend pipeInfo
- Publication number
- JPS6453719A JPS6453719A JP20731287A JP20731287A JPS6453719A JP S6453719 A JPS6453719 A JP S6453719A JP 20731287 A JP20731287 A JP 20731287A JP 20731287 A JP20731287 A JP 20731287A JP S6453719 A JPS6453719 A JP S6453719A
- Authority
- JP
- Japan
- Prior art keywords
- forming
- outside
- advance
- forming die
- bend pipe
- 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.)
- Granted
Links
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
PURPOSE:To prevent the crush and thickness reduction of a product by forming a bulging part in advance on the part equivalent to the out side bending part of a blank and executing pressed forming via a core metal between the outside and inside forming dies. CONSTITUTION:A hydraulic bulge forming die 10 is provided in advance and a bulging part 2a is formed at the part equivalent to the outside of a bending part via the compression force by a high liquid pressure P and pressurizing levers 12, 13 on the blank straight pipe. Then formed hollows 23, 26 are respectively formed on an outside forming die 21 and inside forming die 22 and the preforming pipe 2 inserting core metals 28, 28 is set. In this state, an L type bend pipe 3 is subjected to press forming between both forming dies 21, 22 by descending the inside forming die 22 by a press cylinder. Due to the bulging part 2a being formed in advance at the outside part of the bending part, the thickness deviation necessary for the outside forming is executed. Consequently the crush and thickness reduction of a bend pipe 3 are thus prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20731287A JPS6453719A (en) | 1987-08-20 | 1987-08-20 | Production of bend pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20731287A JPS6453719A (en) | 1987-08-20 | 1987-08-20 | Production of bend pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6453719A true JPS6453719A (en) | 1989-03-01 |
JPH0257455B2 JPH0257455B2 (en) | 1990-12-05 |
Family
ID=16537685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20731287A Granted JPS6453719A (en) | 1987-08-20 | 1987-08-20 | Production of bend pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6453719A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0770435A1 (en) * | 1995-09-21 | 1997-05-02 | Benteler Ag | Method for making a construction part and axle support |
-
1987
- 1987-08-20 JP JP20731287A patent/JPS6453719A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0770435A1 (en) * | 1995-09-21 | 1997-05-02 | Benteler Ag | Method for making a construction part and axle support |
Also Published As
Publication number | Publication date |
---|---|
JPH0257455B2 (en) | 1990-12-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |