JPS579542A - Pipe expander relating to electric welded pipe - Google Patents
Pipe expander relating to electric welded pipeInfo
- Publication number
- JPS579542A JPS579542A JP8252380A JP8252380A JPS579542A JP S579542 A JPS579542 A JP S579542A JP 8252380 A JP8252380 A JP 8252380A JP 8252380 A JP8252380 A JP 8252380A JP S579542 A JPS579542 A JP S579542A
- Authority
- JP
- Japan
- Prior art keywords
- dies
- pipe
- male
- circular conical
- sectional
- 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 prevent cracking during pipe expanding by providing projections on the inside surfaces of male dies and grooves on the outside surface of a circular conical cylinder spirally in the opposite directions of right and left, forcing in the circular conical cylinder and rotating the sectional dies of the male dies in mutually opposite directions in the male dies consisting of plural pieces of the sectional dies and the circular conical cylinder radially expanding these.
CONSTITUTION: Male dies 13 are set by being contracted with a spring 14 in contact with the nut 12 of a guide rod 10, and a pipe 30 is loaded into the dies 13. The right end of the pipe 30 is matched to the projection 16 of the dies 13 and the upper half 17U of female dies is put on and is locked by means of bolts 19 in a manner as to prevent the pipe 30 from rotating. Pressurized oil is fed to a hydraulic cylinder 4 to slide a ram 7 leftward, thereby loading a circular conical working head 8 into the internal space 15 of the dies 13. At this time, the grooves 9 provided spirally in the opposite directions of right and left on the outside surface of the head 8 and the projections 13R of the inside surface of the male dies are fitted. Further, when the pressurized oil is fed and the head 8 is slided leftward, the sectional dies 13aWc rotate right and sectional dies 13dWf rotate left, thereby sliding and radially expanding. The pipe 30 receives pressure from the male dies 13 and forms an expanded shape.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8252380A JPS579542A (en) | 1980-06-18 | 1980-06-18 | Pipe expander relating to electric welded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8252380A JPS579542A (en) | 1980-06-18 | 1980-06-18 | Pipe expander relating to electric welded pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS579542A true JPS579542A (en) | 1982-01-19 |
Family
ID=13776880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8252380A Pending JPS579542A (en) | 1980-06-18 | 1980-06-18 | Pipe expander relating to electric welded pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS579542A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59106627U (en) * | 1982-12-29 | 1984-07-18 | 横浜ゴム株式会社 | Pipe partial repair device |
| CN106862402A (en) * | 2016-12-29 | 2017-06-20 | 张家港市和恒精工机械有限公司 | A kind of gas-liquid mixed power pipe expander |
-
1980
- 1980-06-18 JP JP8252380A patent/JPS579542A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59106627U (en) * | 1982-12-29 | 1984-07-18 | 横浜ゴム株式会社 | Pipe partial repair device |
| CN106862402A (en) * | 2016-12-29 | 2017-06-20 | 张家港市和恒精工机械有限公司 | A kind of gas-liquid mixed power pipe expander |
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