Machining technology of head integral PCD drill bit

Abstract

The invention aims to provide a machining technology of a head integral PCD drill bit. Firstly PCD parent metal is welded to a hard alloy handle part, and then the hard alloy handle part is subjectedto diamond grinding wheel grinding; then a copper wheel is utilized to conduct fluting grinding and grinding electrolysis on a head of the PCD parent metal, an excircle of a grinding wheel is adoptedto conduct edge cleaning and electrolysis and edge line producing, in this way, the concentricity of the PCD parent metal and the handle part is ensured; an arc drill point is adopted to conduct grinding electrolysis on an arc slag containing tank, so that force can be borne more stably, and blade breaking is not prone to happening; and finally a four-plane form is adopted to conduct grinding electrolysis on a rear corner, thus force bearing is more stable, and the quality of a radial angle of the drill bit is ensured as well. The produced drill bit can sharply improve the production efficiency for machining titanium alloys, compared with a hard alloy, the rotation speed can be improved, and feeding can be accelerated. Compared with traditional diamond grinding wheel grinding forming, theprecision of the drill bit machined by adopting the technology is high and stable by using the copper wheel.

Description

technical field [0001] The invention relates to the manufacturing field of tool drill bits, in particular to a processing technology of a PCD drill bit with an integral head. Background technique [0002] Processing titanium alloys has always been a difficult problem. Using high-speed steel has too low a service life, and using cemented carbide is too slow. It is generally recognized that the best processing material is PCD, but processing PCD materials is very difficult. At present, there are only three methods. Diamond grinding wheel processing, but it is difficult to control the size of the tool, the grinding wheel wears very fast, and the accuracy is difficult to guarantee. The second method is to use electrical discharge machining, which is the protagonist of our patent application this time, but there are two ways of electrical discharge machining, one is wire cutting and wire cutting, which can only process simple geometric shapes, such as chip pockets, Engraving and...

AI Technical Summary

Problems solved by technology

[0002] Processing titanium alloys has always been a difficult problem. Using high-speed steel has too low a service life, and using cemented carbide is too slow. It is generally recognized that the best processing material is PCD, but processing PCD materials is very difficult. At present, there are only three methods. Diamond grinding wheel processing, but it is difficult to control the size of the tool, the grinding wheel wears very fast, and the accuracy is difficult to guarantee

The second method is to use electrical discharge machining, which is the protagonist of our patent application this time, but there are two ways of electrical discharge machining, one is wire cutting and wire cutting, which can only process simple geometric shapes, such as chip pockets, Engraving and other operations are impossible, but we use the method of copper wheel electrode electrolysis, and various complex contours can be processed; the third method is laser, but the cost of laser equipment is expensive, and it is only in the research and development stage. Not yet fully on the market