Hot melting drilling tapping thread forming tap

Abstract

The invention discloses a screw tap, in particular a hot melting drilling tapping thread forming tap. The hot melting drilling tapping thread forming tap comprises a handle part, a tapping drill bit and a hot melting drill bit, wherein the handle part, the tapping drill bit and the hot melting drill bit are integrally molded; the hot melting drill bit is positioned at the front end; the tapping drill bit is positioned in the middle; the handle part is positioned at the tail end; the diameter of the tapping drill bit is larger than the diameter of the hot melting drill bit; the diameter of the handle part is smaller than the diameter of the hot melting drill bit; and the tapping drill bit is a thread forming tap. The hot melting drilling tapping thread forming tap combines two procedures of hot melting drilling and internal thread processing as a whole, and has the advantages of simplicity, convenience, high positioning precision, good thread quality and high working efficiency compared with traditional processing by two tools (the hot melting drill bit and the thread forming tap); as the thread forming tap is used for chipless processing, molded surfaces of threads are full, and the thread connecting strength is improved; the hot melting drilling tapping thread forming tap is an internal thread processing tool with excellent performance, and in particular, is suitable for drilling and tapping various black metals, stainless steels and such nonferrous metals as copper and aluminum alloys.

Description

technical field [0001] The invention relates to a screw tap, in particular to a hot-melt drilling and tapping extrusion screw tap. Background technique [0002] In mechanical processing, it is often necessary to solve the problem of detachable connection of thin-walled workpieces. The detachable connection of thin-walled workpieces is generally by tapping directly in the thin-walled through hole, and the threaded connection of thin-walled workpieces is realized by screws. Due to the insufficient wall thickness of the thin-walled workpiece and the small number of thread teeth, the strength, self-locking and reliability of the threaded connection are poor. In order to improve the strength of the threaded connection, a method of hot-melt drilling and tapping has emerged, which includes drilling and tapping separately, that is, drilling with a hot-melt drill bit first (see figure 1 ), the high temperature generated by the drilling will melt the drilling part into a bushing (see...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the existing hot-melt drilling and tapping must be clamped twice, resulting in large processing errors and time-consuming defects, and to invent a one-time forming hot-melt drilling and tapping extrusion tap The hole tapping extrusion tap is a tap that uses the front end of the tap to drill a hole to generate high temperature to melt the drilled part into a bush, and then uses the back end of the tap to process the bush internally.

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