Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1994-08-29
1996-12-17
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
72110, B21H 502
Patent
active
055842020
ABSTRACT:
A steel sheet material is stamped from a coil stock material to form a disc blank member. The disc blank member is pressed to form an ash tray metal member. The ash tray metal member is sized to form a hollow cylindric metal body having a flange portion, a cylindric porion and a bottom portion by a press working. The cylindric metal body is inserted a central porion of a mandrel having a tooth profile part. The cylindric metal body is clamped and held by a drive shaft and a driven shaft which are rotated together with the mandrel. Under this state, the cylindric portion of the cylindric metal body is pressed by a roller. The metal of the cylindric portion of the cylindric metal body is fluidized plastically along the tooth profile part of the mandrel, thereby an internal gear is formed on the cylindric portion. The internal gear is applied to a reduction gear mechanism starter for use in an automobile.
REFERENCES:
patent: 2086488 (1937-07-01), Batie
patent: 3473211 (1969-10-01), Lindell
patent: 4671125 (1987-06-01), Yabunaka
patent: 4884427 (1989-12-01), Sawahata et al.
Kanamaru Hisanobu
Kohashi Yasuo
Hitachi , Ltd.
Larson Lowell A.
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