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紧固用的螺纹连接在没有磕碰的情况下,只要去掉毛刺、清理干净,旋合通常是比较顺利的。对于要求二级精度以上的大尺寸的螺纹连接,旋合就不像低精度螺纹连接那么容易。这是由于螺栓与螺母之间的配合间隙较小所致。二级精度以上螺纹连接的螺栓与螺母,用螺纹环规和螺纹塞规检验合格后又为什么常常出现旋合困难,特别是对于大尺寸零件,甚至会出现旋不进、取不出的咬死现象呢?
Tighten the screw connection in the case of no bump, just remove the burr, clean, spin is usually more smoothly. For large-size threaded connections that require more than two levels of accuracy, screwing is not as easy as a low-precision threaded connection. This is due to the small clearance between the bolt and the nut. Two level above the accuracy of the threaded bolts and nuts, with threaded ring gauges and thread plug gauge after passing the test why the spin-on often occurs difficult, especially for large parts, or spin will not enter, can not get killed Phenomenon?