INDUCTION HARDENING EQUIPMENT AND METHOD

摘要

PROBLEM TO BE SOLVED: To provide induction hardening equipment which performs quenching of a groove wall on a cylindrical member such as a hub outer ring with a groove formed on its inner periphery, according to a plan without causing quenching crack.

SOLUTION: A copper shield member 94 is removably fixed inside a cup-shaped upper center 90 with a bolt 95 etc. The copper shield member 94 has a disk shape and has a thickness almost equal to the distance between the bottom of the cup-shaped upper center 90 to the top of a thin-walled part 38. A rim 94a of the shield member 94 projects downward, faces the inner periphery of about one-third of the upper portion of the thin-walled part 38 and contacts the thin-walled part 38.

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