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附图是我厂采用的一种顶尖,利用它来装夹不大的轴类等工件,在装卸活时可以不停车,可以节省辅助时间,提高工作效率。这顶尖的结构很简单,仅由四个零件组成。附图中,1是螺塞,2是弹簧,3是外套,退拔部分与车头主轴孔配合;端面有四个经过淬硬的齿,用来夹紧工件。4是顶尖。工作时,将工件顶尖孔对准顶尖4,另一端由尾顶尖顶住;旋紧尾顶尖,工件就将顶尖4压进外套3,而外套3端面的齿就楔进工件端面,工
The picture is a kind of top used by our factory. It can be used to clamp the shaft and other workpieces. It can not stop while loading and unloading, which can save auxiliary time and improve work efficiency. The top structure is simple, consisting of only four parts. In the drawings, 1 is a screw plug, 2 is a spring, 3 is a jacket, and the withdrawing part is matched with a spindle hole of a locomotive; and four hardened teeth are arranged on the end surface for clamping the workpiece. 4 is the top. When working, the top hole of the workpiece is aligned with the top 4, and the other end is supported by the top of the tail. When the top of the tail is screwed up, the top of the workpiece is pressed into the outer casing 3 and the teeth of the end surface of the jacket 3 wedge into the end surface of the workpiece