Technology for manufacturing cutting tooth for mining coal and minerals

A manufacturing process and technology of picks, which are applied in the field of manufacturing picks for coal mining, can solve the problems of cemented carbide tooth heads protruding, falling off, desoldering, low service life of picks, and affecting service life. Small deformation and thermal influence, improved service life, and the effect of prolonging service life

Active Publication Date: 2011-03-30
HUNAN LIANSHAO CONSTR ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the material hardness of the tooth body of the pick steel body is much lower than that of the carbide tooth head, it is easy to wear, so the phenomenon that the carbide tooth head protrudes, falls off, desolders and breaks with the steel body tooth body during the cutting process often occurs. The service lif

Method used

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Embodiment Construction

[0010] Embodiments of the present invention will be further described below.

[0011] A kind of manufacturing process of the pick used in coal mining, described pick comprises tooth body and tooth point, and its manufacturing process comprises the following steps: (1) the prefabrication of tooth body, a) select cylindrical carbon tool steel at first Carry out precision forging into a conical tooth body blank, wherein the initial forging temperature is 1050-1150°C, and the final forging temperature is 750-800°C; b) Carry out spheroidizing annealing treatment, put the above-mentioned tooth body blank into the furnace for heating to 800-850°C and keep it in an incubator at this temperature for 2-3 hours, then keep it at 650-700°C for 1-2 hours, then keep it at 400-450°C for 1-2 hours, and then cool naturally to Normal temperature; c) Machining the tooth body blank after the above treatment to obtain a conical tooth body body, then drilling a tooth tip hole on the end of the tooth...

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Abstract

The invention relates to technology for manufacturing a cutting tooth for mining coal and minerals. The cutting tooth comprises a tooth body and a tooth tip, and the technology is characterized by comprising the following steps of: (1) pre-manufacturing the tooth body; (2) pre-manufacturing the tooth tip; (3) assembling the tooth tip and the tooth body; (4) cladding a wear-resistant layer on the surface of the tooth body of the assembled cutting tooth; (5) performing salt bath treatment and quenching treatment on the product in the step (4); (6) performing low-temperature tempering treatment on the quenched product; and (7) performing post-treatment on the tempered product so as to obtain the finished cutting tooth. The deformation and thermal effect of the cutting tooth treated by the treatment technology are extremely low, and the service life is prolonged by 5 to 6 times. Compared with the traditional cutting teeth, the cutting tooth with the wear-resistant layer on the surface of the tooth body has higher Vickers hardness, and through detection, the hardness is more than 1,800 and is far greater than the Vickers hardness of the traditional cutting teeth. Due to higher hardness, the service life of the cutting tooth is greatly prolonged.

Description

technical field [0001] The invention relates to a manufacturing process of a coal mining device, in particular to a manufacturing process of a coal mining pick. Background technique [0002] The pick is an important part of the shearer, and it is also the most consuming and easily damaged part on the shearer. At present, the various types of traditional picks used by domestic coal mining machines are generally made of alloy steel inlaid with hard alloy, and the production cost is high. Conventional coal mining pick refers to welding hard alloy tooth tips on the tooth head, and the pick steel body and tooth body are made of special steel (such as 30CrMnTi, 30CrMnSi, etc.). Since the material hardness of the tooth body of the pick steel body is much lower than that of the carbide tooth head, it is easy to wear, so the phenomenon that the carbide tooth head protrudes, falls off, desolders and breaks with the steel body tooth body during the cutting process often occurs. The s...

Claims

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Application Information

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IPC IPC(8): E21C35/18E21C35/183
Inventor 曾美霞陈娟
Owner HUNAN LIANSHAO CONSTR ENG GRP
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