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图1所示的椭圆腔体,对光洁度和形位公差的要求都很高。加工的主要难点是椭圆孔及孔与设计轴心线的不对称度要求。椭圆孔的(?)12级光洁度仅仅用切削加工的方法是不能满足的,最终都必须经研磨和抛光来达到。所以实际上要求切削加工后的椭圆孔光洁度达到(?)7以上,并且符合图纸要求的形状,同时还应留有一定的研磨和抛光余量。用仿形刨加工显然是不可能满足上述要求的。而如果采用线切割加工,由于线切割机钼
The elliptical cavity shown in Figure 1 has high requirements for finish and form tolerances. The main processing difficulties are elliptical holes and holes and the design of the axis of asymmetry requirements. Ellipse hole (?) 12-level finish only with the cutting method is not satisfied, and ultimately must be obtained by grinding and polishing. So in fact require cutting oval hole finish (?) 7 above, and in line with the requirements of the shape of the drawings, but also leave some grinding and polishing margin. It is obviously impossible to meet the above requirements with the profiling process. And if the use of wire cutting, cutting machine due to molybdenum