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SCREW STRUCTURE, SCREW COMPONENT, SCREW CUTTING TAP, DRIVING RIVET, PROCESS OF MANUFACTURE OF SCREW STRUCTURE AND ROLLING DIE
SCREW STRUCTURE, SCREW COMPONENT, SCREW CUTTING TAP, DRIVING RIVET, PROCESS OF MANUFACTURE OF SCREW STRUCTURE AND ROLLING DIE
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机译:螺钉结构,螺钉组件,螺钉切割丝锥,驱动铆钉,螺钉结构和轧制模具的制造过程
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摘要
PROBLEM TO BE SOLVED: To provide a screw structure capable of remarkably reducing a contact area in respect to a mating member 8 as compared with that of the prior art, its process of manufacture, a rolling die used for its manufacture, a screw component having such a screw structure, a screw cutting tap and a driving rivet.;SOLUTION: There are provided the first and second helical valley grooves 2, 3 crossing to each other to form several ridges 4 surrounded by these two valley grooves 2, 3, these ridges 4 are discontinuous from each other, but constitute a common screw thread to make a screw structure and these ridges 4 form a sharp-pointed shape toward an advancing direction of the screw thread. The rolling die has the first rolling die with the first protrusion corresponding to the first valley groove 2 and the second rolling die with the second protrusion corresponding to the second valley groove 3.;COPYRIGHT: (C)2015,JPO&INPIT
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