目前,很大部分发动机制造企业(包括汽油机和柴油机)都采用整体式凸轮轴,其材料有的采用中碳低合金锻钢,经高频淬火;有的采用球墨铸铁。整体式凸轮轴工艺流程长,整个加工工艺包括粗加工、半精加工和精加工,使用设备较多,加工工艺复杂,采用自动线多工位机床,设备投资较大,生产线占地面积多,生产成本较高。而装配式凸轮轴只有半精加工和精加工,重量可 At present, most engine manufacturers (including gasoline engines and diesel engines) all adopt integral camshafts. Some of their materials are made of medium-carbon low-alloy forged steel and are quenched by high frequency. Some are made of ductile iron. Integral camshaft long process, the entire processing technology, including roughing, semi-finishing and finishing, the use of more equipment, complex processing technology, the use of automatic multi-station machine tool, equipment investment, production line covers an area of ​​more than production higher cost. The assembly type camshaft only semi-finishing and finishing, weight can be