关键词：重载机床，滚珠丝杠，双导程，承载能力，刚度，渗油，噪音 Abstract: Based on the performance requirements of heavy-duty machine tool ball screw, a new type of ball screw structure is designed by improving the traditional ball screw. The new structure adopts double-pitch ball screw, which enhances the bearing capacity and rigidity of the ball screw by increasing the pitch and the number of ball bearings, and improves the problems of oil seepage and noise that are easy to occur in traditional ball screws. At the same time, the performance superiority of the new ball screw is verified by experimental tests. Finally, this paper summarizes the advantages and application prospects of the new ball screw. Keywords: heavy-duty machine tool, ball screw, double pitch, bearing capacity, rigidity, oil seepage, noise.,滚珠丝杠端头受力主要有两种情况： 1. 端头受到轴向负载（axial load）的作用：此时滚珠丝杠端头承受的主要是轴向拉伸或压缩力，其大小等于轴向负载的大小,相比于传统的蜗杆传动方式，滚珠丝杠具有传动效率高、精度高、寿命长等优点，因此在高精度加工设备中广泛应用, 6. 最后，测试滚珠丝杠是否能够顺畅旋转，并且不出现松动或异响,较小的轴向游隙通常意味着更高的精度和稳定性,定期对滚珠丝杠进行清洁，并及时更换润滑剂，可有效延长使用寿命, 4. 将小圆形和圆形之间的线条连接起来，形成滚珠丝杠的轴心线,往复运动滚珠丝杠是一种机械传动装置，主要用于将旋转运动转换为直线运动,滚珠排列通常是沿着丝杠螺旋线的方向排列的，以确保滚珠能够顺畅地滚动, 6. 分析结果：根据仿真结果，分析滚珠丝杠的运动特性和工作性能，评估其可靠性和有效性