组合刀具由两个以上的工作部分组合在一个刀体上，能同时或依次加工两个以上表面或完成一个表面多道加工工序的刀具。
采用组合铣刀切断灰口铸铁材质的汽车发动机主轴承盖时，出现工件掉渣、刀具崩刃、噪声大等问题。
Problems of falling chip, tool tipping and big noise are happened during cutting off main bearing caps made of gray casting by using combination milling cutters.
因此，在零件投入生产前就必须优化刀具组合，可以使没有多少加工经验和技巧的工艺员也能编制高效的加工程序。
Accordingly, it is necessary to optimize cutting tools before cutting the parts, which could let processors lack of experience and technique edit high - efficiency nc programs.
提出一种组合曲面加工无干涉刀具轨迹的生成算法。
An algorithm is presented for generating interference free tool paths in nc machining of compound surfaces.
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