Invention Grant
US08689598B2 Method of forming a tenon on one side of a metal plate member 失效
在金属板构件的一侧上形成榫头的方法

Method of forming a tenon on one side of a metal plate member
Abstract:
A method of forming a tenon on one side of a metal plate member by means of punching the wall of one side of the metal plate member with a punch or punches to form a protrusion and then punching the protrusion with a punch rod to extend the height of the protrusion and to deform the protrusion into a tubular configuration.
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