公开(公告)号：US07065996B2

公开(公告)日：2006-06-27

申请号：US10631808

申请日：2003-08-01

申请人： Etsuo Koike ,  Hitoshi Sannomiya

发明人： Etsuo Koike ,  Hitoshi Sannomiya

IPC分类号： B21H3/04

CPC分类号： B21H3/04 ,  B21H7/187

摘要： A rolling die for a ball screw has: a cylindrical portion including a helical protrusion formed in an outer peripheral surface thereof for forming a helical ball groove in a raw material of a screw shaft of the ball screw; and a conical lead-in portion formed in one end portion of the cylindrical portion, the lead-in portion including a plurality of frustum-cone-shaped portions, wherein the contact angles of the frustum-cone-shaped portions with respect to the raw material of the screw shaft are each set so as to increase sequentially in the order starting at and from the frustum-cone-shaped portion adjoining the cylindrical portion.

摘要翻译： 一种用于滚珠丝杠的滚压模具具有：一个圆柱形部分，包括形成在其外周表面上的螺旋形突起，用于在滚珠丝杠的螺杆轴的原料中形成螺旋球槽; 以及形成在所述圆筒部的一个端部部分中的圆锥形引入部分，所述引入部分包括多个截头锥形部分，其中所述截头锥形部分相对于所述原始圆锥形部分的接触角 螺杆轴的材料各自设置成以从与圆柱形部分相邻的截头锥形部分开始的顺序依次增加。