JPS6440120A - Hemming method - Google Patents

Hemming method

Info

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
Application number
JP19778287A
Other languages
Japanese (ja)
Other versions
JPH0527497B2 (en
Inventor
Yozo Hirose
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP19778287A priority Critical patent/JPS6440120A/en
Publication of JPS6440120A publication Critical patent/JPS6440120A/en
Publication of JPH0527497B2 publication Critical patent/JPH0527497B2/ja
Granted legal-status Critical Current

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.
JP19778287A 1987-08-07 1987-08-07 Hemming method Granted JPS6440120A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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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