Production of a bearing seat of a main bearing and lifting bearing of crankshafts comprises molding, rolling all grooves or undercuts of the bearings, straightening rolling the crankshaft, fine machining, pre-milling and final milling

摘要

Production of a bearing seat of a main bearing and lifting bearing of crankshafts comprises molding by machining with required cutting, rolling all grooves or undercuts of the main and lifting bearings, straightening rolling the crankshaft, fine machining, rotating pre-milling and final milling. An independent claim is also included for a machine tool for carrying out the above process. Preferred Features: The bearing seat of the crankshaft is smooth rolled after the final milling.