Novel-structure wear-resistant bit tooth

Abstract

At present, a bit tooth is prepared from an alloy-structure steel material; because the alloy-structure steel has low rigidity and is not wear-resistant, a hard alloy cylindrical tooth is broken and falls off early; the service efficiency of the precious hard alloy cylindrical tooth is only 30 percent, and the waste is great; a diamond cylindrical tooth prepared from a superhard material has higher requirement on wear resistance of the bit tooth; the upper end of the bit tooth is provided with a hard alloy sleeve to solve the problem of low wear resistance, but the hard alloy sleeve is broken after being impacted, and cannot protect the diamond cylindrical tooth; moreover, the hard alloy sleeve is high in price and the waste is great. The invention adopts a technical scheme that: a novel-structure wear-resistant bit tooth is characterized by consisting of a bit tooth made of alloy-structure steel, and a wear-resistant body at the upper end of the bit tooth made of the alloy-structure steel, wherein the wear-resistant body is made of die steel or high-speed steel. The hard alloy cylindrical tooth or diamond cylindrical tooth can be effectively protected; and the novel-structure wear-resistant bit tooth is widely applied to coal mines, metallurgy and tunnel engineering.

Description

technical field [0001] The invention relates to the technical field of mining machinery in the coal industry, in particular to a novel structure wear-resistant pick body used on a coal mining excavator. Background technique [0002] The pick is an important part of the excavator, and it is also the part that consumes the most and is most easily damaged. The technical requirements of the coal industry standard of the People's Republic of China "Coal Mining Picks MT246-1996" stipulate that the mining machine picks used in coal mines are welded by alloy structural steel tooth body and hard alloy column teeth. At present, the picks of mining machines used in coal mines are machined from alloy structural steel, and the cemented carbide column teeth are welded to the teeth of alloy structural steel. Grinding performance, only 1 mm deep heat treatment is done on the outer surface of the tooth, and its hardness is HRC45. Since the tooth body is made of alloy structural steel mater...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the tooth body of the existing mining machine pick has low hardness and is not wear-resistant; the tooth body of the tooth body of the mining machine with a sprayed cemented carbide powder adhesion layer structure, the adhesion layer is combined with the tooth body of the pick It is not firm, relatively soft, and its hardness and wear resistance are not very ideal; the tooth body of the diamond pick with a cemented carbide sleeve has no impact toughness, and the cemented carbide sleeve is broken after being impacted, which does not protect the diamond column teeth.

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