我厂1台T68镗床,在横拖板快速移动时,经常会撞坏丝杆螺母,影响生产.为此,我们对横拖板端头原来限位进行了改进(见图),由螺母推动顶杆1顶动行程开关6,即可停止行程.并将行程开关6串联在快速走刀开关CKN线圈里,使丝杆螺母得到机械和电气的双保护,经过6年时间的使用,再未发生过撞坏螺母现 I T68 factory boring machine, the rapid movement of the crossbar, often will crash screw nut, affecting production.To this end, we have the original horizontal end of the carriage limit has been improved (see photo), driven by the nut The ejector lever 1 moves the travel switch 6 to stop the travel, and the travel switch 6 is connected in series with the CKN coil of the quick travel switch so that the lead screw nut can be mechanically and electrically double protected. After 6 years of use, Has occurred crashing nut now