BOLT ASSEMBLY WITH BALANCE PIECE, BOLT BALANCE PIECE, BALANCE PIECE FIXING JIG, AND BALANCE PIECE FIXING METHOD

摘要

PURPOSE: To improve the certainty of the fitting of a balance piece to a bolt head without hindering the working efficiency. ;CONSTITUTION: A fitting hole 10 provided in a bolt head 3 is formed into a stepped hole, and on the other hand, a balance piece 4 is formed into the shape with a flange having a flange part 19, and the balance piece 4 is pressed into the fitting hole 10, and at least one part of the opening edge of the fitting hole 10 of the bolt head 3 is plastically deformed, and the flange part 19 is pinched for fixation by a plastic deformation part 21 and a step part 13.;COPYRIGHT: (C)1995,JPO