最近,一种用于加工汽车发动机曲轴的车一拉工艺替代了车削和铣削工艺。该工艺是用一些由多个可换刀头组成的拉刀总成同时加工曲轴的几个部分。这些拉刀沿着曲轴被加工部分的圆周作切向送进,或者卧式(水平)或者立式(垂直)均可。通用公司的加拿大有限公司,已安装了4台由4工位垂直走刀的车一拉机床,以生产V-6发动机曲轴。这种机床的切削方式象刮削和磨削一样,其切屑的负荷低,因而 Recently, a car-pull process used to machine crankshafts of automobile engines replaced the turning and milling processes. The process utilizes several broach assemblies made up of multiple interchangeable heads for simultaneous processing of several parts of the crankshaft. These broachs are fed tangentially along the circumference of the machined portion of the crankshaft, either horizontal (horizontal) or vertical (vertical). General Motors Inc. of Canada, which has installed four 4-station car-pull lathes vertically to produce the V-6 engine crankshaft. This kind of machine tool cutting method like scraping and grinding, the chip load is low, so