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４０年来扭制钻头在切削过程中过早地出现崩刃一直是影响产品质量的主要原因。虽然做了很大努力，但根本问题一直没有解决，每年经济损失超百万元。总结他人经验，我们用了近两年的时间做了大量的试验和分析研究工作，最终找到产生扭制钻头崩刃的根源。在保证钻头的几何参数合
For 40 years, it has always been the main reason for the quality of products to be twisted to prevent the bit from collapsing prematurely during the cutting process. Although great efforts have been made, the fundamental problem has not been solved and the annual economic loss exceeds one million yuan. Summarizing the experience of others, we spent the past two years doing a lot of experimental and analytical work, and finally find the root causes of torsional bit collapse. In ensuring the geometric parameters of drill together