JPS5487664A - Stretch bending process - Google Patents
Stretch bending processInfo
- Publication number
- JPS5487664A JPS5487664A JP15556677A JP15556677A JPS5487664A JP S5487664 A JPS5487664 A JP S5487664A JP 15556677 A JP15556677 A JP 15556677A JP 15556677 A JP15556677 A JP 15556677A JP S5487664 A JPS5487664 A JP S5487664A
- Authority
- JP
- Japan
- Prior art keywords
- yield strength
- spring back
- back amount
- plate
- curve
- 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 accuracy, a material to be treated is first stretched with a force greater than its yield strength to provide a predetermined elongation and then bent under this condition.
CONSTITUTION: In the process of force application greater than yield strength, a tensile force is applied to material until a predetermined elongation is reached. This process reduces variations in neutral axis positions and results in reduced variation in spring back amount. For example, a tensile force greater than yield strength of a plate material is applied to the plate until elongation is reached to 1%, and under this tensile load the plate is bent, then the load is removed. In the figure, curve 1 represents the result of conventional process, curve 2 the invetion, which clearly indicates the decreased variation in spring back amount. This process is applicable in a different ambient temperature or process rate, giving similarly decreased spring back amount.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15556677A JPS5935300B2 (en) | 1977-12-26 | 1977-12-26 | Tensile bending method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15556677A JPS5935300B2 (en) | 1977-12-26 | 1977-12-26 | Tensile bending method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5487664A true JPS5487664A (en) | 1979-07-12 |
JPS5935300B2 JPS5935300B2 (en) | 1984-08-28 |
Family
ID=15608839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15556677A Expired JPS5935300B2 (en) | 1977-12-26 | 1977-12-26 | Tensile bending method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5935300B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007105756A (en) * | 2005-10-13 | 2007-04-26 | Hitachi Ltd | Tension bending method of material to be shaped and apparatus therefor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6306410B2 (en) * | 2014-04-17 | 2018-04-04 | 日本メクトロン株式会社 | Flexible printed board manufacturing method, board manufacturing jig, and board manufacturing apparatus |
-
1977
- 1977-12-26 JP JP15556677A patent/JPS5935300B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007105756A (en) * | 2005-10-13 | 2007-04-26 | Hitachi Ltd | Tension bending method of material to be shaped and apparatus therefor |
Also Published As
Publication number | Publication date |
---|---|
JPS5935300B2 (en) | 1984-08-28 |
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