The raising of machineability problems of automobile castings, their machining characteristics, technical difficulties of their machining, present situation in China and abroad was described briefly.

• 对汽车铸件加工性能问题的提出、机加工特点、国内外现状、技术难点等作了简明扼要的论述,同时研究了反映强烈的个别问题并获得了一些明显的效果。