JPS5445671A - Uniform pipe expansion method - Google Patents
Uniform pipe expansion methodInfo
- Publication number
- JPS5445671A JPS5445671A JP10587478A JP10587478A JPS5445671A JP S5445671 A JPS5445671 A JP S5445671A JP 10587478 A JP10587478 A JP 10587478A JP 10587478 A JP10587478 A JP 10587478A JP S5445671 A JPS5445671 A JP S5445671A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- pipe
- detector
- given
- medium
- 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
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
PURPOSE: To provide a uniformly expanded pipe excellent in fixability as well as water sealing by a process in which an axial compression load is given to an elastic medium for expanding pipes inserted into an intended pipe to raise the expansion pressure up to a set level and then, reduced after it is maintained under the set pressure for fixed time.
CONSTITUTION: A pipe expansion pressure detector having electrodes 15 and 17 with an elastic medium made of rubber or the like grasped at both ends and sensing sections 16 and 18 is inserted into a pipe 1. Then, when an oil pressure is given to a hydraulic cylinder 6, an axial load is applied to a pressure rod 3 so that the medium 4 is compressed to expand the pipe radially. When the pipe expansion pressure reaches a preset level Po for the detector 10, the detector is actuated to provide a detection signl. The signal sctivates a timer 12 set for a given time. At the same time, a solenoid valve closes a hydraulic circuit to maintain the pressure of the medium 4 at the level Po. When the timer 12 reaches a preset time, the valve 13 is opened so that the pressure of the hydraulic cylinder 6 begins to fall.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10587478A JPS5445671A (en) | 1978-08-30 | 1978-08-30 | Uniform pipe expansion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10587478A JPS5445671A (en) | 1978-08-30 | 1978-08-30 | Uniform pipe expansion method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10714476A Division JPS5331556A (en) | 1976-09-06 | 1976-09-06 | Device for uniformly expanding pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5445671A true JPS5445671A (en) | 1979-04-11 |
Family
ID=14419084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10587478A Pending JPS5445671A (en) | 1978-08-30 | 1978-08-30 | Uniform pipe expansion method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5445671A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286231A (en) * | 2013-06-14 | 2013-09-11 | 哈电集团（秦皇岛）重型装备有限公司 | Thick-wall nickel base alloy heat exchanging tube and nickel base alloy tube plate expanding-connecting technology |
| CN109773019A (en) * | 2018-12-25 | 2019-05-21 | 宁波思明汽车科技股份有限公司 | EGR shell oral area hole-crimped forming technique |
-
1978
- 1978-08-30 JP JP10587478A patent/JPS5445671A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286231A (en) * | 2013-06-14 | 2013-09-11 | 哈电集团（秦皇岛）重型装备有限公司 | Thick-wall nickel base alloy heat exchanging tube and nickel base alloy tube plate expanding-connecting technology |
| CN109773019A (en) * | 2018-12-25 | 2019-05-21 | 宁波思明汽车科技股份有限公司 | EGR shell oral area hole-crimped forming technique |
| CN109773019B (en) * | 2018-12-25 | 2019-11-05 | 宁波思明汽车科技股份有限公司 | EGR shell oral area hole-crimped forming technique |
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