Characteristics of Materials and Types of Cutting Teeth for Coal Mining Machines

Characteristics of Materials and Types of Cutting Teeth for Coal Mining Machines
The selection of cutting teeth mainly depends on their material. There are many types of cutting teeth, and different types of cutting teeth are used on different equipment. The machining accuracy of the cutting teeth of the tunneling machine mainly affects the strength, especially the gears. When the gears are closed, poor contact between the tooth surfaces often leads to local wear and reduces the strength of the gears. Drilling and mining parts workers, factories, and stores The types of cutting teeth on the upper part are complete. Attention should be paid to the gap between non working tooth surfaces during tooth engagement, to supplement the elastic deformation of the pick after being subjected to force, and to prevent thermal expansion and contraction after being heated, so as to avoid burning people during the rotation of the pick. There are high requirements for the gear accuracy of the pick in various aspects.
There are many types of cutting teeth, and the general structure is to embed a hard alloy cutting head on a low alloy structural steel cutting body that has been quenched and tempered. Cutting teeth withstand high cyclic compressive stress, shear stress, and impact load during operation.
The main forms of failure are tool head detachment, tool breakage, tool head and tool body wear. Under certain operating conditions, the failure of the cutting teeth is often caused by the breakage of the tool body. Due to the direct impact of the mechanical performance of the rotary excavator cutter body on the service life of the cutter, a reasonable selection of the material of the cutter body and an effective heat treatment method has a positive significance in reducing the wear and fracture of the cutter body, reducing the consumption of coal mining machine cutters, improving the operating rate of coal mining machinery, and increasing the comprehensive economic benefits of coal mining production.