公开(公告)号：US20070113612A1

公开(公告)日：2007-05-24

申请号：US11285049

申请日：2005-11-22

申请人： Hideo Takekoshi ,  Eiji Iwata

发明人： Hideo Takekoshi ,  Eiji Iwata

IPC分类号： B21D28/00

CPC分类号： B21D28/26 ,  B21D35/00

摘要： To provide the manufacturing method for the press work product reducing the chance of causing distortion of the countersink as press-forming the countersink. This is the manufacturing method for a press work product which has a tapped bore for a stem of a flat countersink head screw to penetrate therethrough and a countersink formed around a circumferential line of the tapped bore for a head of the flat countersink head screw to seat therein, comprising steps of forming a work as the press work product by punching a plate material, trimming an outside diameter of said work, and forming said countersink by inserting said work after trimming the outside diameter into a press die to press form thereof.

摘要翻译： 为了提供冲压加工产品的制造方法，减少了将锪孔变形的可能性，如压制成型的锪孔。 这是一种用于冲压加工产品的制造方法，其具有用于贯穿其中的平坦埋头螺钉的杆的螺纹孔，以及形成在螺纹孔的圆周线周围的埋头孔，用于平坦埋头螺钉的头部到座 其特征在于，包括以下步骤：通过冲压板材来形成作为压制加工品的工件，修剪所述工件的外径，并且通过在将外径修剪成压模之后将所述工件插入其压制形状来形成所述埋头孔。