The idea of machining the shaft parts of the lathe machine without the material head is to study the foreign imported mechanical parts, according to the surface of the parts and the thimble holes, after careful analysis, inspired by the research, but its installation The card fixture structure has not yet been clarified and needs further study. According to the analysis of workpiece impression, the workpiece end has a positioning center hole, and six radial tool indentations are distributed around it, which is similar to the general wood turning machine processing clamping, but the clamping fixture may be more complicated. Since there is no data introduction for the equipment of the tileless machine, there is no data to introduce it. Therefore, the triangular and quadrangular pyramids are used instead of the clamping fixture. The effect is good, the process aim and the machining precision are achieved, and the triangular pyramid And the quadrangular pyramid is easy to manufacture and easy to install, which can improve work efficiency and save materials.