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Patent Searching and Data


Title:
PRODUCTION OF PRESS PARTS
Document Type and Number:
Japanese Patent JPH10249466
Kind Code:
A
Abstract:

To restrict face dulling of an outer periphery generating when press cutting is executed from one face side and to improve the shape precision of the outer periphery of a press parts by forming an inclining face on the one face of a base material.

In the case of continuous forming a gear, a metal tape 30 composed of many kinds of metals of a brass, a phospher bronze and a beryllium bronze, etc., containing a tin for pressing is used as a base material. By drawing at the initial press position, a plane view circular forming part 31 being proper to a gear part is formed with swelling in a turned down bowl like from the circumferential part 32. Next, the metal tape 30 is fed along the route, after it is arranged at the next press position, it is inserted between a flat bottom type punch 41a and a die 41b having a ring like inclining face. Therefore, an inclining face 31a is formed on the down face of the outer periphery of the forming part 31. Next, the metal tape 30 is again fed along the route, and it is arranged on the next press position.


Inventors:
MICHIHASHI KENICHI
Application Number:
JP5341797A
Publication Date:
September 22, 1998
Filing Date:
March 07, 1997
Export Citation:
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Assignee:
SEIKO EPSON CORP
International Classes:
G04D3/00; B21D28/16; B21D53/28; (IPC1-7): B21D53/28; G04D3/00
Attorney, Agent or Firm:
Kisaburo Suzuki (2 outside)