精密机械加工工艺介绍精密机械加工工艺就是在流程的基础上，达到改变生产对象的形状、尺寸、相对位置和性质的目的，使其成为成品或半成品，一般讲精密加工所要解决的问题有两个，加工精度，包括形位公差及尺寸精度及表面状况；加工效率，有些加工可以取得较好的加工精度，却难以取得高的加工效率。目前精密机械加工工艺主要有精车与精镗、精铣和精磨及研磨和抛光。下面进行具体介绍。

Precision machining technology of precision machining technology is on the basis of the process, to change the production object's shape, size, position and nature of the purpose, making it a finished product or semi-finished products, generally speaking precision machining problems to be solved, there are two, machining accuracy, including the form tolerance and dimensional accuracy and surface condition; Processing efficiency, some processing can achieve better machining accuracy, but it is difficult to achieve high machining efficiency. At present, precise machining process mainly includes fine car and fine boring, fine milling and grinding and polishing. The following is a detailed description.

精车和精镗工艺：飞行器大多数精密的轻合金（铝或镁合金等）零件多采用这种方法加工。一般用天然单晶金刚石刀具,刀刃圆弧半径小于0.1微米。在高精度车床上加工可获得1微米的精度，平均高度差小于0.2微米的表面不平度,坐标精度可达±2微米。

Fine car and fine boring: most of the precision light alloys (aluminum or magnesium alloys etc.) are processed by this method. It is commonly used with natural single crystal diamond tool, the radius of blade is less than 0.1 micron. The precision of a micron is obtained on high precision lathe, the average height difference is less than 0.2 micron, and the coordinate precision can be plus or minus 2 microns.

精铣工艺：用于加工形状复杂的铝或铍合金结构件。依靠机床的导轨和主轴的精度来获得较高的相互位置精度。使用经仔细研磨的金刚石刀头进行高速铣切可获得精确的镜面。

Fine milling process: used for machining complex aluminum or beryllium structures. The precision of the guide and spindle of the machine tool is used to obtain the higher accuracy of each other. Precise mirrors are obtained using a carefully grinding diamond tool head for high-speed milling.