Apparatus and method for net shape finishing of gears

Details Apparatus and method for net shape finishing of gears Apparatus and method for net shape finishing of gears

1992-01-31

1993-06-22

Wyszomierski, George

Metallurgical apparatus

With control means responsive to sensed condition

With means supplying a treating agent

266 89, 266 92, 266118, 266125, C21D 932

Patent

active

052215130

ABSTRACT:
An apparatus is disclosed for performing thermomechanical processing of gears in which precise control of the thermal, metallurgical and mechanical action during the forming process is maintained. The apparatus comprises an induction heating system which reaustenitizes the surface of the gear with minimum decarburization, a material transfer system which provides timely operations on the work piece, tooling and fixture adjustments which provide accurate initial conditions for forming, and a process control architecture that provides the precise sequence and timing necessary to achieve metallurgically sound and dimensionally accurate gears. Using this invention the induction heating cycle can be controlled from the peak, average or minimum gear surface temperature detected with a high response optical pyrometer. An inert environment is maintained around the workpiece during the induction heating and transfer to quenching above the M.sub.s temperature. Both through-feed and in-feed motion are simultaneously controlled by load, position and velocity transducers which provide feedback information to a supervising microprocessor. This apparatus produces metallurgically sound and accurate gears.

REFERENCES:
patent: 1561041 (1925-11-01), White
patent: 3273366 (1966-09-01), Schuman
patent: 3894418 (1975-07-01), Horl
patent: 4373973 (1983-02-01), Cellitti et al.
patent: 4675488 (1987-06-01), Mucha et al.
patent: 4744836 (1988-05-01), Plaffmann
patent: 4746101 (1988-05-01), Scott

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