拆卸锈死的螺母时,一般可采用下述方法: (1)先将螺母拧进1/4～1/2圈,然后退出,再拧进,再退出,反复几次,即可逐渐拧出。 (2)若螺母拧不动,可用手锤在螺母的四周敲击,将锈震松后再按上述方法拧出,也可用煤油浸20～30min后再按上述方法拧出。 (3)如果用上述方法仍卸不下来,可用喷灯将螺母烧热,当螺母受热膨胀而螺栓尚未膨胀时,再趁热拧出。 Demolition of rusty nuts, the general method can be used: (1) first nut into 1/4 ~ 1/2 laps, and then exit, and then screwed in, and then exit several times, you can gradually screw out . (2) If the nut can not be fixed, it can be knocked by the hand hammer around the nut, and the rust can be loosened and then unscrewed according to the above method, or it can be unscrewed by the above method after the kerosene is immersed for 20-30min. (3) If the above method is still unloading, the torch can be used to heat the nut, when the nut is heated to expand the bolt has not yet expanded, and then squeezed out.