Steering rack shaft and method of manufacturing the same

Details Steering rack shaft and method of manufacturing the same Steering rack shaft and method of manufacturing the same

1994-03-10

1995-12-12

Herrmann, Allan D.

Machine element or mechanism

Gearing

Directly cooperating gears

74498, 148572, 148573, 219640, 266125, 266129, F16H 1904, F16H 5526, H05B 614

Patent

active

054739608

ABSTRACT:
A steering rack shaft having a shaft body and rack teeth formed in a predetermined axial region of the shaft body. This steering rack shaft is formed such that a workpiece is quenched, and is then heated for a predetermined time at a temperature exceeding 400.degree. C. so as to be thermally refined, and the rack teeth are subsequently formed. After the formation of the rack teeth, high-frequency induction hardening is provided to form a teeth-hardened layer. Hence, the machining of the rack teeth is facilitated while reducing strain, and the rigidity and toughness of the overall steering rack shaft are improved.

REFERENCES:
patent: 3814202 (1974-06-01), Rushton et al.
patent: 4133221 (1979-01-01), Clary
patent: 4855556 (1989-08-01), Mucha et al.
patent: 5069080 (1991-12-01), Simon
patent: 5242514 (1993-09-01), Wiener et al.

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