一、概述作为国内专业生产曲轴毛坯的主要制造厂之一,第一拖拉机股份有限公司锻造厂至今已经开发、生产了拖拉机、工程机械、轻、中、重型卡车等车辆机械各种发动机曲轴几十种,单只曲轴重量从 30~200kg以上不等。目前,已和国内外30多个厂家建立了协作关系。鉴于曲轴在发动机中 I. Overview As one of the major domestic manufacturers specializing in the production of rough crankshaft, the first Tractor Co., Ltd. forging plant has been developed and produced dozens of engine crankshafts of tractors, construction machinery, light, medium and heavy truck vehicles, etc. Species, single crankshaft weight from 30 ~ 200kg above. At present, it has established cooperative relations with over 30 domestic and foreign manufacturers. Given the crankshaft in the engine