公开(公告)号：US4689983A

公开(公告)日：1987-09-01

申请号：US571171

申请日：1984-01-16

Applicant: Naosuke Masuda ,  Sohsuke Sunaga

Inventor： Naosuke Masuda ,  Sohsuke Sunaga

IPC: B21C23/14 ,  B21J5/12 ,  B21K1/10 ,  B21K1/20 ,  B21K1/30 ,  B62D5/083 ,  B62D5/24 ,  B21D22/26 ,  B21D22/28

CPC classification number: B21J5/12 ,  B21K1/20

Abstract: A method for producing a worm shaft for use in a rotation control valve of a power steering mechanism. The worm shaft is formed with grooves which receive a control body and form therewith a fail safe structure. The grooves are formed evenly so that the permitted range of movement on either side of a neutral position is uniform. A cylindrical member is plastically deformed in two steps to form the outer side of the control valve. Then, while in a die having in inner shape corresponding to the desired outer shape of the worm shaft, a punch, having an outer shape corresponding to the desired shape of the grooves on the inner surface of the worm shaft and an enlarged-diameter portion, is pressed into a hole in the interior of one end of the member to thereby plastically deform the member to the desired final inner and outer configurations.

Abstract translation: 一种用于动力转向机构的旋转控制阀中使用的蜗杆轴的制造方法。 蜗杆轴形成有容纳控制体并具有故障安全结构的凹槽。 凹槽形成均匀，使得在中立位置的任一侧上允许的运动范围是均匀的。 圆柱形构件在两个步骤中塑性变形以形成控制阀的外侧。 然后，在具有与蜗杆轴的期望外形对应的内部形状的模具中，具有与蜗杆内表面上的所需形状对应的外形的冲头和扩径部 被压入构件的一端的内部的孔中，从而将构件塑性变形到期望的最终内部和外部构型。