公开(公告)号：WO2008123654A1

公开(公告)日：2008-10-16

申请号：PCT/KR2008/000463

申请日：2008-01-25

Applicant: YOONSONG TECH CO., LTD. ,  HWANG, Ho Jin

Inventor： HWANG, Ho Jin

IPC: B21C23/08

CPC classification number: B21K1/767 ,  B21K1/768

Abstract: The present invention relates to a steering rack bar, which is one of the important parts for transferring steering force to wheels, when a steering wheel is turned for the steering in an automobile, and more particularly, to a method of manufacturing a steering rack bar for an automobile, which can manufacture the steering rack bar more simply and efficiently, thereby achieving lightness of the steering rack, and a steering rack bar manufactured thereby. The method of manufacturing the steering rack bar for the automobile according to the present invention comprises the steps of cutting a prepared hollow tubular material 10 into a desired length; primarily extruding the cut material to have a desired maximum diameter in the whole; secondary extruding the extruded material so that only a gear portion 14 for forming a rack gear 13 is extruded to reduce an outer diameter thereof thereof; tertiarily extruding one side of the gear portion 14 for forming a plane portion 15; forming a rack gear 13 at the gear portion 14 through a broach working or a hot forging; performing a heat-treatment on the worked rack gear 13 to thereby improve a hardness; and grinding the entire outer diameter of the steering rack bar to make a surface thereof to be neat, and the like.

Abstract translation: 本发明涉及一种在方向盘转向用于汽车的转向时，转向架杆是将转向力传递到车轮的重要部件之一，更具体地说，涉及一种制造转向架杆的方法 对于可以更简单且更有效地制造转向齿条杆的汽车，从而实现转向齿条的亮度和由此制造的转向齿条。 根据本发明的制造用于汽车的转向齿条杆的方法包括以下步骤：将制备的中空管状材料10切割成所需长度; 主要将切割材料在整体上具有期望的最大直径; 二次挤压挤出的材料，使得只有用于形成齿条13的齿轮部分14被挤出以减小其外径; 三次挤出用于形成平面部分15的齿轮部分14的一侧; 通过拉刀加工或热锻造在齿轮部分14处形成齿条13; 对所加工的齿条13进行热处理，从而提高硬度; 并研磨转向齿条的整个外径，使其表面整洁等。