过去我厂加工比较精密的箱体零件(尺寸精度1级,光洁度为 7以上,孔的椭圆度和锥度小于0.003～0.005/200毫米,孔间平行性不大于 0.01/200毫米,孔间距离的误差在土0.01毫米以内),是利用精密的座标镗床或是采用精度比零件精度还要高的镗模。这样,不仅加工成本高,而且生产周期长,在 In the past I plant processing more sophisticated parts of the box (dimensional accuracy of 1, a finish of 7 or more, the ovality and taper of the hole is less than 0.003 to 0.005 / 200 mm, parallelism between holes is not greater than 0.01 / 200 mm, the distance between the holes Error within the soil 0.01 mm), is the use of precision coordinate boring machine or the use of precision than the parts even higher precision boring mold. In this way, not only the processing cost is high, but also the production cycle is long