| 摘要 |
A new and improved thread rolling die for forming a new and improved threaded fastener, and a new and improved method or technique of manufacturing the new and improved threaded fastener, is disclosed wherein the new and improved threaded fastener comprises a first, primary thread lead, and a pair of second, auxiliary thread leads alternatively interposed between successive threads of the first, primary thread lead. As a result of the provision of the pair of second, auxiliary thread leads being interposed between successive ones of the threads of the first, primary thread lead, not only is additional axial reinforcement provided for the threaded fastener, but more importantly, the lateral or transverse distance through which the material comprising the blank member must be displaced or moved in order to form the successive threads of the first, primary thread lead is substantially reduced. Such a substantial reduction in the distance through which the material of the blank member must be moved or displaced permits the number of revolutions, through which the blank member must be rotated in order to permit the complete formation of the thread leads upon the blank member, to be accordingly reduced which, in turn, permits the axial length of the thread rolling dies to be reduced. In this manner, substantially smaller thread rolling machines are able to be used in connection with the manufacture of the threaded fasteners so as to render the manufacturing processes more cost effective. |
