回転摩擦接合による自動車エンジン部品の製法

抄録

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.