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在汽车修理中,经常会遇到螺栓被拧断的情况,这不仅影响修复进度,而且旋取断头螺丝的方法不当时还可能导致零部件的损坏甚至报废,那么螺栓为什么会被折断呢?断头的螺丝又该如何取出呢? 螺栓折断的原因: ①长时间不保养,螺丝与螺孔锈在一起,拆卸时大力反旋将螺栓折断; ②装配时,不按规定扭矩旋紧螺栓,因扭力过大造成螺栓折断; ③螺栓的材料选用不当,或热处理未达到要求,其强度太低; ④旋紧或拆卸螺栓的方法不当; ⑤螺栓疲劳断裂。 预防螺栓折断的措施:
In the auto repair, often encounter bolts are screwed off the situation, which not only affect the repair progress, and the method of screw extraction screw failure may also result in damage or even scrapped parts, then why the bolt is broken it? How to remove the broken screw? Bolt breakage reasons: ① for a long time do not care, screw and screw rust together, the demolition of vigorously anti-spin the bolt broken; ② assembly, do not follow the required torque to tighten the bolt, Due to excessive torque caused by broken bolts; ③ bolt improper selection of materials, or heat treatment does not meet the requirements of its strength is too low; ④ tighten or remove the bolt improper method; ⑤ bolt fatigue fracture. Prevention of bolt breakage measures: