JPS5677033A - Pipe expanding method - Google Patents
Pipe expanding methodInfo
- Publication number
- JPS5677033A JPS5677033A JP15387779A JP15387779A JPS5677033A JP S5677033 A JPS5677033 A JP S5677033A JP 15387779 A JP15387779 A JP 15387779A JP 15387779 A JP15387779 A JP 15387779A JP S5677033 A JPS5677033 A JP S5677033A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- end part
- straightness
- roundness
- expanded
- 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
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
PURPOSE: To lubricatively expand the inside surface of pipe end part based on measured values and improve the dimensional accuracy of the end part of a large- diameter part by expanding the central part of a pipe and measuring the roundness and straightness of the pipe end part not expanded.
CONSTITUTION: First, the central part 4 of a steel pipe 1 is expanded half by half from the right and left by a pipe expander 5 to release the residual stress in the central part 4. Next, in the state that the pipe expanding head 7 provided to the end of the pull rod 6 in the pipe expander 5 is held inserted, the roundness and straightness of the unexpanded pipe end part 3 are measured with a roundness measuring device 8 and a straightness measuring device 9. Thence, based on the measured values, the head 7 is moved in the axial direction of the pipe 1 by way of a control unit. At this time, the pipe end part 3 is expanded while it is being lubricated from the inside by synchronizing the opening and closing of the lubricating oil injection nozzle 11 of the lubricating device 10 of the head 7.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15387779A JPS5677033A (en) | 1979-11-28 | 1979-11-28 | Pipe expanding method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15387779A JPS5677033A (en) | 1979-11-28 | 1979-11-28 | Pipe expanding method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5677033A true JPS5677033A (en) | 1981-06-25 |
Family
ID=15572055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15387779A Pending JPS5677033A (en) | 1979-11-28 | 1979-11-28 | Pipe expanding method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5677033A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6015029A (en) * | 1983-07-06 | 1985-01-25 | Nippon Kokan Kk <Nkk> | Controlling method of lateral bending for mechanical expander |
WO2013075626A1 (en) * | 2011-11-24 | 2013-05-30 | 贵州安大航空锻造有限责任公司 | Method for hot bulge-forming titanium alloy irregularly-shaped ring-rolled workpiece |
WO2015032228A1 (en) * | 2013-09-05 | 2015-03-12 | 无锡双友石化机械有限公司 | Expanding head support ring oil path system |
-
1979
- 1979-11-28 JP JP15387779A patent/JPS5677033A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6015029A (en) * | 1983-07-06 | 1985-01-25 | Nippon Kokan Kk <Nkk> | Controlling method of lateral bending for mechanical expander |
JPH0248335B2 (en) * | 1983-07-06 | 1990-10-24 | Nippon Kokan Kk | |
WO2013075626A1 (en) * | 2011-11-24 | 2013-05-30 | 贵州安大航空锻造有限责任公司 | Method for hot bulge-forming titanium alloy irregularly-shaped ring-rolled workpiece |
WO2015032228A1 (en) * | 2013-09-05 | 2015-03-12 | 无锡双友石化机械有限公司 | Expanding head support ring oil path system |
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