精密切削加工就是利用车床在车床上进行产品的加工成的一种零件，利用工件的旋转运动和刀具的直线运动或曲线运动来改变毛坯的形状和尺寸，把它加工成符合图纸的要求。

A machining precision turning lathe is the use of the product on the lathe, to change the shape and size of blank by linear movement or curve movement of the workpiece rotation and tool, processing it into line with the requirements of the drawings.