MANUFACTURING METHOD OF LARGE CALIBER SLEWING RING BEARING AND MANUFACTURED LARGE CALIBER SLEWING RING BEARING USING THE SAME

摘要

PURPOSE: A large-diameter pivot bearing and a manufacturing method thereof are provided to minimize the loss of a material by excluding mechanical cutting of the material. CONSTITUTION: A method for manufacturing a large-diameter pivot bearing comprises the steps of: butting both ends of a bar-shaped thick plate(M) against each other in a circular ring shape(S10), friction stir welding the butted ends of the thick plate(S20), and heat-treating the welded thick plate at 400-600C(S30).