随着科学技术的发展,航空仪表的规格日趋小型化。小刀具的研制在工艺上已提到了重要的地位。特别是小于1毫米的特殊螺纹工具的设计和制造,对航空工业部门来说还几乎是空白。我厂某产品需加工M0.55×0.15特殊规格外螺纹。由于该零件为冲压件,螺纹毛坯是经落料后再压圆的,所以其截面不是完整的圆 With the development of science and technology, the specifications of aviation instruments are increasingly miniaturized. The development of small tools has been mentioned in the craft an important position. In particular, the design and manufacture of special thread tools smaller than 1 mm is almost empty for the aviation industry. I plant a product to be processed M0.55 × 0.15 special specifications of the external thread. Since the part is a stamping part, the thread blank is pressed round after being blanked so that its cross section is not a complete circle