公开(公告)号：KR1020040096053A

公开(公告)日：2004-11-16

申请号：KR1020030028857

申请日：2003-05-07

Applicant: 현대자동차주식회사

Inventor： 손현수

IPC: B21D53/86

CPC classification number: B21D53/88 ,  B21D22/21 ,  B21D28/243 ,  B23G1/16

Abstract: PURPOSE: To obtain cost reduction effect through reduction of processing process and parts and obtain a superior quality assembly structure with improved durability as a high stiffness structure by integrally forming a nut part capable of clamping a bolt on an aluminum sheet through pressing and punching. CONSTITUTION: The manufacturing method comprises a step of integrally projectingly forming a circular bending part (11) on an aluminum sheet (10) by press forming; a step of perforating a hole on the lower surface of the circular bending part through punching (15); and a step of forming a screw thread (12) on the inner surface of the circular bending part through tapping (16), wherein the circular bending part is formed by a gap between a jig mold (14) arranged under the aluminum sheet and a press (13) during press forming, and wherein the aluminum sheet is formed in such a way that it is two or more times thicker than depth of the screw thread formed on the inner surface of the circular bending part to maintain bolt assembling strength. The aluminum sheet comprises a nut part which is integrally formed, and on the inner surface of which a screw thread is formed so that the screw thread is clamped with a clamping object.

Abstract translation: 目的：通过减少加工工艺和零件获得成本降低的效果，并且通过一体地形成能够通过冲压和冲压将螺栓夹紧在铝板上的螺母部分而获得具有提高的耐久性作为高刚度结构的优质组装结构。 构成：制造方法包括通过压制成型在铝板（10）上一体地突出形成圆形弯曲部（11）的步骤; 通过冲压（15）在圆形弯曲部件的下表面上穿孔的步骤; 以及通过出料口（16）在圆形弯曲部件的内表面上形成螺纹（12）的步骤，其中，所述圆形弯曲部分由布置在铝板下方的夹具模具（14）和 在压制成形期间按压（13），并且其中铝片形成为比形成在圆形弯曲部分的内表面上的螺纹的深度厚两倍或更多的厚度，以保持螺栓组装强度。 铝板包括一体形成的螺母部，并且在其内表面上形成有螺纹，使得螺纹被夹紧对象夹紧。