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在车削螺纹时,如果车床丝杆的螺距不是工件螺距的整倍数,就不能随便按开合螺母,不然就会出现乱扣现象。由于目前工厂中使用的车床大部份没有乱扣盘装置。所以车工师傅在车削螺纹时,一般都是靠操纵车床的倒、顺开关来防止乱扣。用倒、顺车车削螺纹有一个明显的缺点,就是不适宜高速车削。因高速车削时如果倒、顺车起动频繁,容易损坏车床的摩擦片或烧坏电机。
In the turning thread, if the screw pitch of the lathe is not an integral multiple of the workpiece pitch, you can not simply press the opening and closing nuts, otherwise, the phenomenon of disorderly buckling may occur. Due to the fact that most of the lathes currently used in the factory do not have a buckle disc device. So master chef in the turning thread, usually by operating the lathe down, Shun switch to prevent chaos buckle. Inverted, smooth turning thread has an obvious drawback, that is not suitable for high-speed turning. If the high-speed turning down, smooth start frequent, easy to damage the lathe friction plate or burn the motor.