Technology for manufacturing cutting tooth for mining coal and minerals

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...

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 life of the pick is low; the other is to use the insert-cast pick, which is to put cemented carbide in the mold cavity, and then pour molten iron to form it at one time, but the insert-cast pick is prone to shrinkage during the casting process. Defects such as looseness and inclusions seriously affect the service life