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Pickax type cutting tooth plasma-clad with composite tungsten carbide tooth tip and machining method

A technology of plasma cladding and processing methods, which is applied in the fields of cutting machinery, earth drilling, metal material coating technology, etc., and can solve the problems of increased difficulty in boring and milling blind holes, increased production costs of picks, high hardness of high-alloy tooth heads, etc. problems, to avoid tooth tip exposure and fall off, improve coal mining efficiency, and improve wear resistance

Inactive Publication Date: 2020-07-17
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Pickax type cutting tooth plasma-clad with composite tungsten carbide tooth tip and machining method
  • Pickax type cutting tooth plasma-clad with composite tungsten carbide tooth tip and machining 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 pickax type cutting tooth plasma-clad with a composite tungsten carbide tooth tip and a machining method. The machining method includes the steps that a medium carbon alloy hardened and tempered steel tooth body not including a tooth head portion is machined, the tooth body is subjected to quenched-tempered heat treatment, an alloy steel tooth head with high tempering resistance is subjected to friction welding, and the top of the tooth head is plasma-clad with the composite tungsten carbide tooth tip. Optimization combination of the strength and the toughness of themiddle of the tooth body of the cutting tooth, the high-temperature wear resistance of the tooth head and the coal rock cutting performance of the tooth tip is achieved, the tungsten carbide tooth tipis fully utilized, the tooth body with the abraded and scrapped tooth head can be recycled, and therefore the production cost is reduced.

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