CONSTANT VELOCITY UNIVERSAL JOINT

摘要

PROBLEM TO BE SOLVED: To provide a cost-reduced and high-angle constant velocity universal joint. SOLUTION: An outer joint member 1 made of steel material is preliminarily formed into an almost specific shape through a hot forging or sub hot forging process and its inside diameter surface 1a and guide groove 1b are formed through a cold forging process. The guide groove 1b is finished by this cold forging process. An inner joint member 2 made of steel material is preliminarily formed into an almost specific shape through a hot forging or sub forging process and its outside diameter surface 2a and guide groove 2b are formed through a cold forging process. The guide groove 2b is finished by this cold forging process.