Metal working – Plural diverse manufacturing apparatus including means for... – Binding or covering and cutting
Patent
1996-07-16
1998-03-03
Briggs, William R.
Metal working
Plural diverse manufacturing apparatus including means for...
Binding or covering and cutting
29 33J, 72102, B23P 2300
Patent
active
057221383
ABSTRACT:
A disc-shaped material is prepared by punching a high carbon steel plate or soft steel plate, and the disc-shaped material is fixed in position. An outer peripheral portion of the disc-shaped material is heated to a temperature of 400.degree.-500.degree. C. by means of a high frequency heater. The outer peripheral portion of the disc-shaped material is swaged to form a thickened portion by a swaging die and the thickened portion is then spun to plastically form a toothed gear to the outer peripheral portion of the disc-shaped material in two steps of coarse working and finish working by spinning dies. The thus formed toothed gear is further heated as occasion demands to a temperature of about 900.degree. C. for quenching.
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Briggs William R.
Kubota Iron Works Co., Ltd.
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