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5. 发明授权

US09950380B1 Method for forming a dual threaded die 有权
公开(公告)号：US09950380B1
公开(公告)日：2018-04-24
申请号：US14206949
申请日：2014-03-12
申请人： Mark Doll , Zebula Doll
发明人： Mark Doll , Zebula Doll
IPC分类号： B21H3/06 , B23H5/04 , B23G9/00 , B21K1/44 , B21K1/56 , B23H1/04 , B23H9/00 , B24B3/60
CPC分类号： B23H1/04 , B23H9/003 , B24B3/602
摘要： An electric discharge machining electrode is shaped to form a die for roll forming a dual threaded screw. The electrode is oriented with a face thereof adjacent to a forming surface of the die and placed within an electric discharge machine to cause electric discharge via the electrode to the forming surface of the die, to shape the die to have the geometry required for roll forming of the dual threaded screw. The EDM electrode face has a plurality of troughs and tips substantially matching coarse threads of the screw. Grooves are formed in the tips. The grooves are angled relative the tips and have a geometry substantially matching the fine threads of the screw. The face of the electrode has a form which shapes the forming surface of the die so that the die can roll form the dual threaded screw.

6. 发明授权

US08602841B2 Form tap and method of making such 失效
标题翻译：形式龙头和制作方法
公开(公告)号：US08602841B2
公开(公告)日：2013-12-10
申请号：US12491768
申请日：2009-06-25
申请人： Harry Leroy Ellis
发明人： Harry Leroy Ellis
IPC分类号： B24B49/00
CPC分类号： B23G7/02 , B24B3/20 , B24B3/602
摘要： A form tap includes a shank having a shank length and a thread portion that extends along at least a portion of the shank length. The thread portion includes a finishing portion and a chamfer portion. Each of the finishing portion and the chamfer portion include a plurality of threads and each thread has a crest and a root. The plurality of threads of both the finishing portion and the chamfer portion are spaced apart at a constant pitch, such that a crest-to-crest distance between adjacent threads remains constant along the entire thread portion.
摘要翻译：形状分接头包括具有柄部长度的柄部和沿柄长度的至少一部分延伸的螺纹部分。螺纹部分包括精加工部分和倒角部分。每个精加工部分和倒角部分包括多个螺纹，并且每个螺纹具有顶部和根部。精加工部分和倒角部分的多个螺纹以恒定间距间隔开，使得相邻螺纹之间的波峰间距保持沿整个螺纹部分恒定。

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