Brake shoe assembly and method of forming

摘要

A brake shoe assembly (20) is formed by precision stamping a net shaped web blank (22) out of steel forming a series of tabs (32) projecting outward therefrom, stamping a corresponding table member (24) provided with tab receiving apertures (46), and bending the table member (24) into a semi-cylindrical segment. The web blank (22) and the table (24) are assembled causing the web tabs (32) and table apertures (46) to be interlocked securely locating the parts temporarily together. The cooperating tabs (32) and apertures (46) are then permanently joined together using a hot staking process which quickly heats, radially deforms and self quenches the tab (32) to metallurgically strengthen the joint.