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在螺纹联结中,如果把钢质螺钉直接拧入软金属或非金属机壳的螺孔中,很容易使螺孔损坏,出现乱扣或脱牙现象,于是不能再起到联结的作用。对损坏了的螺孔,修复是很麻烦的,一般只能采取加大螺孔的办法。如果由于外观或装配互换性等方面的原因,不允许加大螺孔,或者加大后的螺孔再次损坏,整个机壳就有可能因此而报废。因此,对于需要经常装拆的螺
In the threaded connection, if the steel screw screwed directly into the soft metal or non-metallic chassis screw hole, it is easy to make the screw hole damage, chaos buckle or tooth decay phenomenon, it can no longer play the role of link. Damage to the screw holes, repair is very troublesome, generally can only take to increase the screw hole approach. If due to appearance or assembly interchangeability and other reasons, does not allow to increase the screw hole, or increase the screw hole again damaged, the entire cabinet may therefore be scrapped. Therefore, the need for regular installation and demolition of the screw