METHOD AND DEVICE FOR MANUFACTURING DOUBLE TAPERED SPRING STEEL WIRE

摘要

PROBLEM TO BE SOLVED: To manufacture a double tapered spring steel wire in which tapered parts are provided at end parts of a straight part. SOLUTION: In manufacturing the double tapered spring steel wire in which the tapered parts are provided at both end parts of the straight part, the tapered parts are formed by a swaging machine or a peeling machine 16, the straight part and tapered parts are uniformly heated by induction heating and continuously hardened and tempered.