当铣床工作时,操作工不慎,将托架螺母座撞断。托架螺母座损坏后,机床不能正常工作。修复的方法,一是更换新的托架,二是焊接修复。这两种方法都存在着托架座孔与原升降台支承传动丝杠的两轴承座孔的同轴度要求不能保证的问题。从而影响了机床的加工精度。 When the milling machine work, the operator inadvertently, the bracket nut seat hit off. Bracket nut seat is damaged, the machine can not work properly. Repair method, one is to replace the new bracket, and second, repair welding. Both of these methods have the problem that the coaxiality of the two bearing housings of the bracket seat hole and the original lifting table supporting the driving screw can not be guaranteed. Thus affecting the machining accuracy of the machine.