B21K1/50

ROLLED-THREAD BOLT PRODUCTION METHOD
20180283437 · 2018-10-04 · ·

A rolled-thread bolt production method includes: forming a steel wire into a workpiece having a prescribed unthreaded-bolt shape; forming a threaded-portion on the workpiece through thread rolling; and performing shot blasting on an entire surface of the workpiece after forming the threaded-portion.

ROLLED-THREAD BOLT PRODUCTION METHOD
20180283437 · 2018-10-04 · ·

A rolled-thread bolt production method includes: forming a steel wire into a workpiece having a prescribed unthreaded-bolt shape; forming a threaded-portion on the workpiece through thread rolling; and performing shot blasting on an entire surface of the workpiece after forming the threaded-portion.