公开(公告)号：US07162904B2

公开(公告)日：2007-01-16

申请号：US10201455

申请日：2002-07-19

申请人： Jean-Claude Carayon ,  Lucien Brun

发明人： Jean-Claude Carayon ,  Lucien Brun

IPC分类号： B21D3/02

CPC分类号： B23G7/02 ,  B21D51/18 ,  B21D51/40 ,  B23G1/16 ,  B23G2210/12

摘要： A method for producing a bung for a metal cask that does not require a conventional collar and seal, and that simplifies the operations for forming the bung. The method disclosed in the present application includes the following steps. First, a prestamping operation creates a preforming dome in the wall of the cask such that a cuvett is formed. Second, an approximately cylindrical shaft is formed by stamping and thus puncturing the wall of the cask at the location of the bung. Third, the protruding edge of the shaft is folded down the to form an external rolled edge. Fourth, encircling the shaft with a rigid ring constituted by at least two annular sections such that the metal does not tear during the formation of the threads. Finally, the method of the present invention includes the step of implementing a roller threading head to form internal threads in the shaft.

摘要翻译： 一种用于生产用于不需要常规轴环和密封件的金属桶的栓的方法，并且简化了用于形成栓的操作。 本申请中公开的方法包括以下步骤。 首先，加压操作在木桶的壁中产生预成型的圆顶，从而形成一个圆筒。 第二，通过冲压形成近似圆柱形的轴，并因此在桶的位置刺穿桶的壁。 第三，轴的突出边缘向下折叠以形成外部卷边。 第四，用由至少两个环形部分构成的刚性环围绕轴，使得金属在形成螺纹期间不会撕裂。 最后，本发明的方法包括实现滚轮螺纹头以在轴中形成内螺纹的步骤。