机械设计工作中,传递扭矩的无键联接常采用过盈配合结构。近年来,许多设计人员为提高过盈配合的可靠性,常在配合零件联接的一端或两端,增加焊缝联接,满以为能将两种联接传递的扭矩叠加起来,更能起到保险作用, In mechanical design, torque-free keyless joints are often used with interference fit structure. In recent years, many designers to improve the reliability of the interference fit, often with the parts connected to one or both ends, increasing the weld connection, full thought that the torque can be superimposed on the two kinds of connection, and more play a role in insurance ,