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Title:
HEMMING DEVICE
Document Type and Number:
Japanese Patent JP3750435
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To implement both the preliminary hemming and the permanent hemming subsequent thereto in a short time with a simple structure and under simple movement.
SOLUTION: A swing arm 5 is moved from a waiting position P1 to the hemming position in an interlocking manner with the elevating operation of a hemming die 3 to position punches 14, 15 for the preliminary hemming and the permanent hemming at the hemming position. When the hemming die 3 reaches the preliminary hemming height position Q1, the preliminary hemming is implemented by the punch 14 to a hemming flange part F. In a process in which the hemming die 3 is further elevated, the punch 14 for the preliminary hemming is retracted, and when the hemming die 3 reaches the permanent hemming height position Q2, the permanent hemming is implemented by the punch 15 for the permanent hemming.


Inventors:
Kenzo Natsume
Application Number:
JP25244199A
Publication Date:
March 01, 2006
Filing Date:
September 07, 1999
Export Citation:
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Assignee:
Nissan Motor Co., Ltd
International Classes:
B21D19/08; B21D39/02; (IPC1-7): B21D39/02; B21D19/08
Domestic Patent References:
JP11138222A
JP6320224A
JP47020053A
JP54065160A
Attorney, Agent or Firm:
Tsuyoshi Hashimoto
Hiromichi Kobayashi
Tomioka Kiyoshi