解读 VDI 2230 拧紧扭矩表
拧紧扭矩表看似只是一张查表——找到螺纹,读出数值。但实际上,表中印出的数值是一系列假设条件的终点:摩擦等级、强度等级、屈服利用率,以及用于达到预紧力的装配方法。 Torque is only a proxy for preload. Roughly ninety per cent of the input at the wrench is consumed overcoming friction under the head and in the thread, and only the remainder becomes clamp force. That is why the fricti…
