H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 6/10 (2006.01) C21D 9/32 (2006.01) H05B 6/36 (2006.01) H05B 6/40 (2006.01) C21D 1/10 (2006.01)
Patent
CA 2155308
An induction-hardening machine (20) for the contour hardening of hypoid gears (27) includes a programmable logic control unit (21), a source of quench liquid (40) and a high-frequency induction generator (22) which are operably connected to a high-frequency induction coil (70), which has a generally conical lower face (71) and is positioned over and concentric with the hypoid gear (27). The support plate (28) for the hypoid gear (27) is to a rotary drive motor (30) and with the hypoid gear rotating at approximately 900 to 1800 RPM the induction coil (70) is energized with four low energy pulses of relatively short duration. The final heating step is a high energy pulse followed immediately by the quenching step. There is an inclined angle between the lower face (71) and the upper face of the hypoid gear (27) so as to achieve balanced heat from heel (72) to toe (73).
Chaplin Michael R.
Storm John M.
Contour Hardening Inc.
Smart & Biggar
LandOfFree
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