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螺栓越紧越好汽车上用螺栓、螺母连接的坚固件很多,应保证其足够的预紧力,但也不能拧得过紧。若拧得过紧,一方面将使连接件在外力的作用下产生永久变形,另一方面将使螺栓产生拉伸永久变形,预紧力反而下降,甚至造成滑扣或折断现象。传动皮带越紧越好汽车发动机的水泵、发
Bolts tighter and better Car with bolts, nuts, a lot of solid parts connected, should ensure that it is sufficient preload, but it can not be over-tightened. If over tightened, on the one hand will make the connector under the action of external force permanent deformation, on the other hand will make the bolt tensile permanent deformation, preload but decreased, or even cause the slider or broken phenomenon. Drive belt tighter and better car engine pumps, hair