随着机械工业的发展和圆柱齿轮新标准的贯彻,高精度的齿轮和齿轮刀具的需要量越来越大,要适应这个形势,靠原来的工艺装备是有一定困难的。象精加工的磨齿心轴,过去采用滑动配合型式,尽管最大限度地压缩了制造公差,如:加工A 级盘形剃齿刀的磨齿心轴,其制造公差仅为0.002毫米(φ63.5°-0.002),但剃齿刀内孔的公差为0.005毫米 With the development of machinery industry and the implementation of new standards for cylindrical gears, the demand for high-precision gears and gear cutting tools is growing. To adapt to this situation, it is difficult to rely on the original technology and equipment. Like machined grinding spindles, which used to be a slip-fit ​​type, the manufacturing tolerances were only 0.002 mm (φ63) despite the manufacturing tolerances being minimized, such as grinding the mandrel for a Class A disc shaving cutter. 5 ° -0.002), but the tolerance of the hole in the shaving cutter is 0.005 mm