Apparatus for hardening the cam tracks of camshafts for internal combustion engines

US4147335A · kind A · utility

Assignee

• Audi-Nsu Auto Union Aktiengesellschaft Neckarsulm · DE

Inventor

• Klaus Heck · Hohenacker, DE

Key dates

• Filing date: Jan 27, 1978
• Grant date: Apr 3, 1979
• Expiry date: Jan 27, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D9/30
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An apparatus for hardening the cam tracks of camshafts in which one or more camshafts to be hardened are mounted adjacent a master camshaft for synchronous rotation therewith. A plurality of burners are slidably mounted adjacent each track to be hardened for movement toward and away from the track. A follower on the corresponding track of the master camshaft controls movement of the burner. An eccentric oscillates a plate on which the camshafts are mounted to cover all of the cam track. The burner is turned on and off so that the zone of the cam base circle is not heated and remains unhardened.