图1所示为—防撞架零件,其中主管架中有两个宽7mm、长100mm的开口,要求精度IT13级。原先是采用三面刃铣、锯片铣及立铣等加工方法,不但效率较低,而且也难以保证其形位公差。后经研究,我们在冲床上(200kN以上即可)采用冲裁方法加工其开口,经检查符合图纸要求,提高了生产效率。 Figure 1 shows the crash frame parts, where two 7mm wide and 100mm long openings are required in the main frame, requiring an accuracy of IT13. The original is the use of three-sided edge milling, milling and milling edge sawing and other processing methods, not only less efficient, but also difficult to guarantee its shape and position tolerances. After research, we punch (200kN above) the use of blanking method of processing its openings, the inspection in line with the requirements of the drawings to improve production efficiency.