JPS5487663A - Stretch bending process - Google Patents
Stretch bending processInfo
- Publication number
- JPS5487663A JPS5487663A JP15556477A JP15556477A JPS5487663A JP S5487663 A JPS5487663 A JP S5487663A JP 15556477 A JP15556477 A JP 15556477A JP 15556477 A JP15556477 A JP 15556477A JP S5487663 A JPS5487663 A JP S5487663A
- Authority
- JP
- Japan
- Prior art keywords
- yield strength
- spring back
- variation
- stretch bending
- treated
- 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 provide products of high precision, the variation of spring back amount is reduced by first stretching a material to be treated with a force greater than its yield strength, and then stretchingly bending under load of smaller stretching force.
CONSTITUTION: In stretch bending process, variation of spring back generally occures partly because a variely of yield strength is distributed in a material to be treated. To improve spring back phenomenon, a first tensile which is greater than the maximum yield strength is applied to the material to uniformalize yield strength of the material, and then stretch bending is performed. The process reduces variations relating to neutral axis positions and spring back amount. This results in the reduction of total material variation thereby effecting production of high accuracy.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15556477A JPS5487663A (en) | 1977-12-26 | 1977-12-26 | Stretch bending process |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15556477A JPS5487663A (en) | 1977-12-26 | 1977-12-26 | Stretch bending process |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5487663A true JPS5487663A (en) | 1979-07-12 |
JPS6149016B2 JPS6149016B2 (en) | 1986-10-27 |
Family
ID=15608800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15556477A Granted JPS5487663A (en) | 1977-12-26 | 1977-12-26 | Stretch bending process |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5487663A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5947026A (en) * | 1982-09-10 | 1984-03-16 | Hitachi Ltd | Tension bend-working method |
-
1977
- 1977-12-26 JP JP15556477A patent/JPS5487663A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5947026A (en) * | 1982-09-10 | 1984-03-16 | Hitachi Ltd | Tension bend-working method |
JPH0431766B2 (en) * | 1982-09-10 | 1992-05-27 |
Also Published As
Publication number | Publication date |
---|---|
JPS6149016B2 (en) | 1986-10-27 |
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