JPS55112131A - Forming method of thick-walled uo steel pipe - Google Patents
Forming method of thick-walled uo steel pipeInfo
- Publication number
- JPS55112131A JPS55112131A JP1975079A JP1975079A JPS55112131A JP S55112131 A JPS55112131 A JP S55112131A JP 1975079 A JP1975079 A JP 1975079A JP 1975079 A JP1975079 A JP 1975079A JP S55112131 A JPS55112131 A JP S55112131A
- Authority
- JP
- Japan
- Prior art keywords
- length
- forming
- contact
- steel pipe
- lower die
- 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 form the blank pipe of good shape with an O press of low load by C- forming the material to be formed then U- and O-forming the same to the specific forming length and undeformed band length without allowing the end part of the material and lower die contact with each other than the contact parts of both at all times during forming.
CONSTITUTION: In order to obtain a steel pipe of a thick wall of not less than 19mm in particular, the material to be formed 8 of a thickness tmm is C-formed with the dies of such constitution which does not permit the contact of the material and a lower die 6 other than the end part 9 of the material to be molded 8 and the contact part 10 of the lower die from the start of forming until completion. Thereby, the short undeformed band 21 length lF is obtained under low forming load, and if the outside diameter of the steel pipe is let Dmm, the C-forming length L is made 0.05π(D-t) or more and the length lF is made D/2tan(cos-1D/D+5) or less. When the length lF deviates from this, large peaking P occurs and when the length L satisfies the foregoing, the gap δ after the O forming is assured, resulting in the short length lF. Thereafter, the U- and O-formings are done in succession, but when the U punch shape and height are limited, the effect improves further.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1975079A JPS6040934B2 (en) | 1979-02-23 | 1979-02-23 | Forming method of thick-walled UO steel pipe |
| US06/097,043 US4294095A (en) | 1978-11-22 | 1979-11-23 | Process for fabricating heavy wall to pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1975079A JPS6040934B2 (en) | 1979-02-23 | 1979-02-23 | Forming method of thick-walled UO steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55112131A true JPS55112131A (en) | 1980-08-29 |
| JPS6040934B2 JPS6040934B2 (en) | 1985-09-13 |
Family
ID=12008009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1975079A Expired JPS6040934B2 (en) | 1978-11-22 | 1979-02-23 | Forming method of thick-walled UO steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6040934B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013163198A (en) * | 2012-02-10 | 2013-08-22 | Nippon Steel & Sumitomo Metal Corp | Method for manufacturing uoe steel pipe |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102133645B1 (en) | 2018-09-03 | 2020-07-13 | 도레이첨단소재 주식회사 | Biaxially-oriented polyester film for optical use |
| KR102181892B1 (en) | 2019-02-20 | 2020-11-24 | 도레이첨단소재 주식회사 | Optical polyester film |
| KR20220139481A (en) | 2021-04-07 | 2022-10-17 | 도레이첨단소재 주식회사 | Highly adhesive polyester film for optical use |
-
1979
- 1979-02-23 JP JP1975079A patent/JPS6040934B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013163198A (en) * | 2012-02-10 | 2013-08-22 | Nippon Steel & Sumitomo Metal Corp | Method for manufacturing uoe steel pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6040934B2 (en) | 1985-09-13 |
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