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Plasma cladding composite tungsten carbide tooth tip pick pick and processing method

A technology of plasma cladding and processing method, applied in cutting machinery, earthwork drilling, metal material coating technology, etc., can solve the problem of increasing the production cost of picks, high hardness of high-alloy tooth heads, and difficulty in boring and milling blind holes. and other problems, to achieve the effect of increasing the cost of coal mining, improving the resistance to high temperature and wear resistance, and improving the efficiency of coal mining.

Inactive Publication Date: 2021-05-11
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting new problem is that due to the high hardness of the high-alloy tooth head, the difficulty of boring and milling blind holes is greatly increased, and the production cost of the pick is increased.

Method used

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  • Plasma cladding composite tungsten carbide tooth tip pick pick and processing method
  • Plasma cladding composite tungsten carbide tooth tip pick pick and processing method

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Embodiment Construction

[0031] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0032] figure 1It is a cross-sectional view of an existing pick-type pick. It can be seen from the figure that it includes a tooth body 1 and a tooth tip 2. The tooth shank 1.1, the tooth bottom 1.2, the tooth waist 1.3 and the tooth head 1.4 of the tooth body 1 are processed into In one piece, the tooth tip 2 is welded to the top of the tooth head 1.4 by brazing.

[0033] figure 2 It is a cross-sectional view of the pick pick of the present invention. As can be seen from the figure, although the tooth body of the present invention also includes a tooth shank 1.1, a tooth bottom 1.2, a tooth waist 1.3 and a tooth head 1.4, the tooth head 1.4 of...

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Abstract

The invention discloses a pick-shaped pick for plasma cladding composite tungsten carbide tooth tips and a processing method thereof. The implementation steps are: machining a medium-carbon alloy quenched and tempered steel tooth body excluding the tooth head part → tooth body quenched and tempered heat treatment →Friction welded alloy steel tooth head with high tempering resistance→Plasma cladding composite tungsten carbide tooth tip on the top of the tooth head. The invention realizes the optimal combination of the strength and toughness of the middle part of the pick tooth body, the high temperature wear resistance of the tooth head, and the coal rock cutting performance of the tooth tip, fully utilizes the tungsten carbide tooth tip, and can also recycle the scrapped tooth body worn out by the tooth head, reducing the production cost.

Description

technical field [0001] The invention belongs to the technical field of mining tool preparation, in particular to a production method of a pick-shaped pick for a spiral drum shearer. Background technique [0002] Spiral drum shearer is a high-efficiency mechanized coal mining equipment commonly used in underground coal mining at present. The tool that directly cuts coal rock is the pick pick, which is the main wearing part of the spiral drum shearer. Currently used pick picks such as figure 1 As shown, the tooth body 1 is made of medium-carbon alloy quenched and tempered steel, and the hard alloy tooth tip 2 is brazed on the head of the tooth body. For the convenience of description, the tooth body is called from top to bottom: tooth head 1.4, tooth waist 1.3, tooth bottom 1.1 and tooth shank 1.1. Its production method is: medium carbon alloy quenched and tempered steel tooth body 1 processing → brazing carbide tooth tip 2 → overall quenching and tempering heat treatment of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C35/18E21C35/183C23C24/10
CPCC23C24/103E21C35/18E21C35/183
Inventor 刘宁
Owner SHANDONG UNIV OF SCI & TECH