Producing crank shafts - by machining simultaneously moving surface, side face, and recesses between surface and faces followed by hardening and final grinding

摘要

Producing a crank shaft consists of forging the shaft and then machining the recesses (4), the moving surface (5) and the side faces (3) simultaneously with a tool (6). The radius of the recesses is very small and after machining of the recesses and side faces to their finished dimensions, the surface (5) is finish ground immediately after the surface hardening process. ADVANTAGE - The cost of prodn. is reduced without harming the durability of the crank shaft.