本文简要地论述了梯形螺纹丝锥的设计问题,给出了计算公式,并举实例作了说明。——编者由于梯形螺紋絲錐在攻絲时須切除大量的金屬,且作用于絲錐上的扭轉应力相当高,因此,如絲錐的設計、制造或使用不当,攻絲时极易引起折断。 This article briefly discusses the design of trapezoidal thread tap, gives the calculation formula, and gives an example to illustrate. - Editor Since the trapezoidal thread tapping in tapping a lot of metal to be removed, and acting on the tap torsional stress is quite high, therefore, such as tap design, manufacture or use improper, tapping easily lead to breakage.