Manufacturing Method of Automobile Engine Parts by Rotary Friction Welding

Abstract

Crankshafts for automobile engines are usually manufactured by hot forging and machining. Since the projected area of this part is quite large, a large forging press and hence a large capital investment are required. It is expected that capital investment will be reduced by dividing and forging a crankshaft in parts that are then joined it later. This research is a study on the manufacturing method of joining this sectionally forged product by rotary friction welding (RFW) to make a crankshaft. First, we conducted a basic experiment on the joining conditions of the material by RFW and later conducted an experiment to join the parts of the crankshaft. We were able to propose a manufacturing method that results in the same strength as a normal hot forged crankshaft as well as achieve the desired angular alignment between the joined parts.