公开(公告)号：US07503198B1

公开(公告)日：2009-03-17

申请号：US12027359

申请日：2008-02-07

Applicant: Mike M. Ghiran ,  Vincent J. Sychta ,  George W. Bachelor ,  Terry A. Kent

Inventor： Mike M. Ghiran ,  Vincent J. Sychta ,  George W. Bachelor ,  Terry A. Kent

IPC: B21D28/28

CPC classification number: B21D28/28 ,  B21D26/035 ,  Y10T29/49805 ,  Y10T83/0591

Abstract: An apparatus and method for piercing a hole in a work piece suitable for hydroforming applications is provided. The apparatus includes first and second die portions forming a die cavity for the work piece. Each die includes a punch cavity generally perpendicular to the work piece. One of the punch cavities has a slug capturing area. A punch with an angular cutting face can be moved within a cross passage created by the punch cavities to impact the work piece. The angular cutting face of the punch has a larger surface area than the punch body, which results in expanding slugs pierced from the work piece. The slug capturing area is configured with a cross-sectional area smaller than the surface area of the angular cutting face.

Abstract translation: 提供了一种用于刺穿适合于液压成形应用的工件中的孔的装置和方法。 该装置包括形成用于工件的模腔的第一和第二模具部分。 每个模具包括大致垂直于工件的冲压腔。 其中一个冲孔腔具有块塞捕获区域。 具有角度切割面的冲头可以在由冲头腔产生的横向通道内移动以冲击工件。 冲头的角切削面具有比冲头主体更大的表面积，这导致从工件刺穿的塞子。 块塞捕获区域被构造成具有小于角度切割面的表面积的横截面积。