Method for manufacturing toothed gears

Details Method for manufacturing toothed gears Method for manufacturing toothed gears

1995-04-18

1996-10-08

Echols, P. W.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148586, 2989332, 298933, C21D 922

Patent

active

055627854

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. y 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.

REFERENCES:
patent: 438406 (1990-10-01), Dewey
patent: 659723 (1990-10-01), Williams
patent: 2654944 (1953-10-01), Wilson
patent: 3273366 (1966-09-01), Schuman
patent: 3815395 (1974-06-01), Sass
patent: 5068964 (1991-12-01), Yabuno et al.
patent: 5237745 (1993-08-01), Yamanaka
patent: 5310432 (1994-05-01), Fukui
patent: 5396787 (1995-03-01), Kanemitsu et al.

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