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2. 发明授权

US4677703A Dies for forming drilling screws 失效
标题翻译：用于形成钻孔螺钉的模具
公开(公告)号：US4677703A
公开(公告)日：1987-07-07
申请号：US837295
申请日：1986-03-07
申请人： Katsuhisa Yamasaki
发明人： Katsuhisa Yamasaki
IPC分类号： F16B25/10 , B21K1/44 , B23G9/00
CPC分类号： F16B25/0021 , F16B25/0084 , F16B25/103
摘要： Dies for manufacturing drilling screws and drill sections thereof comprise respectively a cavity formed by all flat faces, two straight longitudinal parallel side edges and two straight oblique front edges formed at the same height as the side edges on the top portion, a top flat elongate face adjacent to the cavity and between one of the side edges and the cavity, inclined faces adjacent to all said edges, and a top flat base face positioned on the same height as the top elongate face and the parallel side edges. The two parallel side edges form cutting edges on flat vertical walls of the drill section of the screw, and the cavities form protruding blocks formed respectively by three flat inclined faces and a relief face. A method of manufacturing a drill section of a drilling screw comprises providing a pair of dies having cavities formed by all flat faces, and being symmetrical, positioning a workpiece between the pair of dies, and closing the pair of dies to form a drill section of a drilling screw therebetween.
摘要翻译：用于制造钻孔螺钉和钻头部分的模具分别包括由所有平面形成的空腔，两个直的纵向平行侧边缘和形成在与顶部上的侧边缘相同高度的两个直的倾斜前边缘，顶部平坦细长面与所述腔相邻并且在所述侧边缘和所述空腔中的一个之间，与所有所述边缘相邻的倾斜面以及位于与所述顶部细长面和所述平行侧边缘相同高度的顶部平坦基底面。两个平行的侧边缘在螺钉的钻头部分的平坦垂直壁上形成切割边缘，并且空腔形成分别由三个平坦的倾斜面和浮雕面形成的突出块。制造钻孔螺杆的钻头部分的方法包括提供一对模具，其具有由所有平面形成并且对称的腔体，将工件定位在所述一对模具之间，并且关闭所述一对模具以形成钻头部分其间的钻孔螺钉。

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