JPS55120426A - Straightening method for shape of thin walled cylinder - Google Patents
Straightening method for shape of thin walled cylinderInfo
- Publication number
- JPS55120426A JPS55120426A JP11914378A JP11914378A JPS55120426A JP S55120426 A JPS55120426 A JP S55120426A JP 11914378 A JP11914378 A JP 11914378A JP 11914378 A JP11914378 A JP 11914378A JP S55120426 A JPS55120426 A JP S55120426A
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- thin walled
- walled cylinder
- point
- straightening
- 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
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE: To make possible the straightening not only during the heating period, but also during the cooling period, and to obtain the sufficient straightening effect, by inseting the second mandrel between the first mandrel and the thin walled cylinder, and by heating and next cooling.
CONSTITUTION: In case of straightening the shape of the thin walled cylinder 1 comprising the ferritic or martensitic steel, the second mandrel 3 is inseted between the first mandrel 2 comprising the austenitic heat resisting steel possessing a large coefficient of thermal expansion and the thin walled cylinder 1. The material of this inserted second mandrel 3 is specified as follows; the coefficient of thermal expansion is similar to or smaller than the coefficient of thermal expansion of the first mandrel 2, and the MS point (martensitic transformation point) is higher than the MS point of the thin walled cylinder 1. These three are assembled into one body and is heated and held for a specified period at temperatures higher than the austenitic transformation point of the material of thin walled cylinder 1; hereby, the first mandrel 2 expands both of the second mandrel 3 and the thin walled cylinder 1, and straightens the shape. Next, the assembly is cooled down to the MS point of the second mandrel 3; hereby, the second mandrel 3 expands to give a plastic deformation to the thin walled cylinder 1 and further improves the straightening effect.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11914378A JPS55120426A (en) | 1978-09-29 | 1978-09-29 | Straightening method for shape of thin walled cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11914378A JPS55120426A (en) | 1978-09-29 | 1978-09-29 | Straightening method for shape of thin walled cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55120426A true JPS55120426A (en) | 1980-09-16 |
Family
ID=14753975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11914378A Pending JPS55120426A (en) | 1978-09-29 | 1978-09-29 | Straightening method for shape of thin walled cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55120426A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5884615A (en) * | 1981-11-13 | 1983-05-20 | Masanobu Nakamura | Method for finishing outer surface of bar-shaped body |
| US5058411A (en) * | 1990-03-15 | 1991-10-22 | General Electric Company | Method for shaping filament reinforced annular objects |
| JP2015215419A (en) * | 2014-05-08 | 2015-12-03 | 富士ゼロックス株式会社 | Method of manufacturing cylindrical body, image holding body, and image forming apparatus |
-
1978
- 1978-09-29 JP JP11914378A patent/JPS55120426A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5884615A (en) * | 1981-11-13 | 1983-05-20 | Masanobu Nakamura | Method for finishing outer surface of bar-shaped body |
| US5058411A (en) * | 1990-03-15 | 1991-10-22 | General Electric Company | Method for shaping filament reinforced annular objects |
| JP2015215419A (en) * | 2014-05-08 | 2015-12-03 | 富士ゼロックス株式会社 | Method of manufacturing cylindrical body, image holding body, and image forming apparatus |
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