Induction shaft heat treatment apparatus

Details Induction shaft heat treatment apparatus Induction shaft heat treatment apparatus

1990-08-02

1991-07-23

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1069, 219 1073, 219 1075, 266129, 148150, H05B 614

Patent

active

050345885

ABSTRACT:
Shaft heat treatment apparatus includes a heat treatment station having a path through which a shaft travels in an axial direction while rotating for heat treating successive axial increments thereof. The shaft is supported by a pair of opposing support jaws at one or more shaft locations intermediate the shaft ends to reduce shaft warpage during heat treatment. The support jaws are transversely movable between shaft-engagement positions and open positions that allow passage of the shaft location through the station. Cam surfaces disposed in proximity to the treatment station engage cam follower surfaces of the support jaws as each pair of support jaws approaches the treatment station to urge the support jaws from the shaft-engagement positions to the open positions to bypass the station without colliding therewith. After the axial shaft location engaged by each pair of support jaws exits the station, the cam/cam follower surfaces allow return of the support jaws to the shaft-engagement position to re-engage the axial shaft location. As a result, each pair of support jaws confines the shaft therebetween at an axial location both before and after bypassing the station to substantially reduce shaft warpage during heat treatment.

REFERENCES:
patent: 2202759 (1940-05-01), Denneen et al.
patent: 2264301 (1941-12-01), Denneen et al.
patent: 2511059 (1950-06-01), Haynes
patent: 3555233 (1971-01-01), Pfaffman et al.
patent: 3622138 (1971-11-01), Kostyal
patent: 3743808 (1973-07-01), Kasper
patent: 3823927 (1974-07-01), Budzinski
patent: 3988179 (1976-10-01), Del Paggio et al.
patent: 4459451 (1984-07-01), Regele

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