JPS56105834A - Necking method for pipe - Google Patents
Necking method for pipeInfo
- Publication number
- JPS56105834A JPS56105834A JP573480A JP573480A JPS56105834A JP S56105834 A JPS56105834 A JP S56105834A JP 573480 A JP573480 A JP 573480A JP 573480 A JP573480 A JP 573480A JP S56105834 A JPS56105834 A JP S56105834A
- Authority
- JP
- Japan
- Prior art keywords
- pipe body
- main pipe
- mandrel
- hydraulic cylinder
- giving
- 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.)
- Pending
Links
Abstract
PURPOSE: To make generation of plastic buckling possible to be effectively prevented, by inserting the pipe end into a cavity of the die, and by inserting a freely rotatable mandrel into a pipe for giving a load to the inner surface of the deformed part.
CONSTITUTION: A freely rotatably mandrel 6 is inserted into the main pipe body 1, which is then grasped by a holding jig 7; after that, an unillustrated motor rotates the main pipe body 1 in the arrowed direction A. On the other hand, said mandrel 6 is connected to a hydraulic cylinder 8. Next, an externally installed hydraulic cylinder is driven to push the main pipe body 1 to a die 4 provided with a cavity 5 shaped so as to be fittable to the shape of the formed product, in the arrowed direction B through the holding jig 7. After giving a deformation to the main pipe body 1 to an extent uncausable a buckling, the mandrel 6 is pressed to the inner surface of the necking part 2 of the main pipe body 1, by the hydraulic cylinder 8.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP573480A JPS56105834A (en) | 1980-01-23 | 1980-01-23 | Necking method for pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP573480A JPS56105834A (en) | 1980-01-23 | 1980-01-23 | Necking method for pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56105834A true JPS56105834A (en) | 1981-08-22 |
Family
ID=11619324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP573480A Pending JPS56105834A (en) | 1980-01-23 | 1980-01-23 | Necking method for pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56105834A (en) |
-
1980
- 1980-01-23 JP JP573480A patent/JPS56105834A/en active Pending
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