公开(公告)号：US20110183573A1

公开(公告)日：2011-07-28

申请号：US13015861

申请日：2011-01-28

申请人： Atsushi OZEKI ,  Keisuke KURE ,  Takashi TAMADA

发明人： Atsushi OZEKI ,  Keisuke KURE ,  Takashi TAMADA

IPC分类号： H01T21/02 ,  B21H3/04

CPC分类号： B21H3/04 ,  H01T13/08 ,  H01T21/02

摘要： A method of manufacturing a metal shell assembly for a spark plug including a cylindrical metal shell that extends in a direction of a central axis and which has a screw portion formed in an outer peripheral surface thereof, and a bar-shaped ground electrode that extends from a front end portion of the metal shell, the method including: disposing an intermediate assembly, having the ground electrode provided in a metal shell intermediate body, between a plurality of rolling dies having process surfaces facing each other; forming the screw portion by performing a rolling process on the intermediate assembly by the plurality of rolling dies while the intermediate assembly is interposed between the plurality of rolling dies; and positioning the ground electrode in a circumferential direction about a central axis of the intermediate assembly between the disposing and forming steps.

摘要翻译： 一种制造用于火花塞的金属壳组件的方法，所述火花塞包括圆柱形金属壳，所述圆柱形金属壳在中心轴线方向上延伸并且具有形成在其外周表面中的螺纹部分，以及棒状接地电极， 金属壳的前端部，其特征在于，具备：设置在所述金属壳中间体中的所述接地电极的中间组件，所述多个轧制模具具有彼此面对的工艺表面; 通过在所述多个轧制模具之间插入所述中间组件的同时通过所述多个轧制模具对所述中间组件执行轧制处理来形成所述螺纹部分; 以及在所述处理和成型步骤之间，将所述接地电极在围绕所述中间组件的中心轴线的圆周方向上定位。