JPS6440120A - Hemming method - Google Patents
Hemming methodInfo
- Publication number
- JPS6440120A JPS6440120A JP19778287A JP19778287A JPS6440120A JP S6440120 A JPS6440120 A JP S6440120A JP 19778287 A JP19778287 A JP 19778287A JP 19778287 A JP19778287 A JP 19778287A JP S6440120 A JPS6440120 A JP S6440120A
- Authority
- JP
- Japan
- Prior art keywords
- hemming
- prevented
- occurring
- steel sheet
- shear droop
- 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
- Heat Treatment Of Articles (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
PURPOSE:To improve the quality of a hemmed product by executing straightening annealing to steel sheet members having a formed flange part each in advance and then hemming it. CONSTITUTION:In hemming steel sheet members 1, 2, first, straightening annealing is executed to the steel sheet member 1 having a formed flange part in a heating oven, etc. At this time, a bent part A of the member 1 and an adjacent part B are annealed to dissolve the difference between deformation resistances. A shear droop is prevented from occurring in the part B even in a prehemming stage, as a result, and shear droop and spring back are prevented from occurring in the parts A and B in the subsequent hemming stage. Hence, the shear droop and spring back are prevented from occurring all over the hemming stages. Accordingly, the deterioration of surface quality due to the hemming is prevented and the quality of the hemmed product is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19778287A JPS6440120A (en) | 1987-08-07 | 1987-08-07 | Hemming method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19778287A JPS6440120A (en) | 1987-08-07 | 1987-08-07 | Hemming method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6440120A true JPS6440120A (en) | 1989-02-10 |
JPH0527497B2 JPH0527497B2 (en) | 1993-04-21 |
Family
ID=16380261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19778287A Granted JPS6440120A (en) | 1987-08-07 | 1987-08-07 | Hemming method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6440120A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02280930A (en) * | 1989-04-21 | 1990-11-16 | Nissan Motor Co Ltd | Hemming method |
US5315435A (en) * | 1990-05-16 | 1994-05-24 | Canon Kabushiki Kaisha | Image stabilizing optical system |
US5520509A (en) * | 1994-12-12 | 1996-05-28 | Staco, Inc. | Fan housing |
US8042372B2 (en) * | 2008-03-14 | 2011-10-25 | GM Global Technology Operations LLC | Method of making an automotive closure panel assembly |
CN111215499A (en) * | 2020-01-15 | 2020-06-02 | 东莞市壬鼎模具有限公司 | Ultra-thin TV backplate corner equipment of borduring that bends |
-
1987
- 1987-08-07 JP JP19778287A patent/JPS6440120A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02280930A (en) * | 1989-04-21 | 1990-11-16 | Nissan Motor Co Ltd | Hemming method |
US5315435A (en) * | 1990-05-16 | 1994-05-24 | Canon Kabushiki Kaisha | Image stabilizing optical system |
US5520509A (en) * | 1994-12-12 | 1996-05-28 | Staco, Inc. | Fan housing |
US8042372B2 (en) * | 2008-03-14 | 2011-10-25 | GM Global Technology Operations LLC | Method of making an automotive closure panel assembly |
CN111215499A (en) * | 2020-01-15 | 2020-06-02 | 东莞市壬鼎模具有限公司 | Ultra-thin TV backplate corner equipment of borduring that bends |
Also Published As
Publication number | Publication date |
---|---|
JPH0527497B2 (en) | 1993-04-21 |
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