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Patent Searching and Data


Title:
TOOL FOR FORMING SCREW THREAD
Document Type and Number:
Japanese Patent JP2008307543
Kind Code:
A
Abstract:

To provide a tool for forming screw threads, which tool can reduce the peak value of the minimum energy necessary for forming screw threads.

The tool 30 forms multiple screw threads on the surface of a workpiece by being moved relative to the workpiece in the state that the tool is brought into pressure contact with the inner circumferential surface of the workpiece. A plurality of teeth 32 formed on the base portion 31 of the tool 30 are formed respectively such that the teeth 32 begin to contact with the surface of the workpiece at different timing when the multiple threads are formed on the surface of the workpiece.


Inventors:
HAMAGURI TOSHIAKI
TAKAGAKI TADASHI
Application Number:
JP2007139034A
Publication Date:
December 25, 2008
Filing Date:
May 25, 2007
Export Citation:
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Assignee:
TOYOTA MOTOR CORP
International Classes:
B21H3/10
Attorney, Agent or Firm:
Hironobu Onda
Makoto Onda