What is the principle of coal mining machine cutting teeth? How to improve efficiency?

What is the principle of coal mining machine cutting teeth? How to improve efficiency?
The cutting principle of a coal mining machine is an important component of its operation. The cutting teeth are installed on the cutter head of the coal mining machine and rotate with the rotation of the cutter head. When the cutting tooth comes into contact with the coal seam, its cutting edge will apply pressure to the coal seam and peel it off through cutting and crushing.
At the moment when the pick starts to contact the coal seam, elastic and plastic deformation will occur within the contact range of the pick. As the contact stress increases and exceeds the strength limit of the coal seam, the coal seam is crushed into very fine powder, forming a dense core. A dense core is composed of crushed coal under pressure. As the cutting tool advances, the dense core gradually grows and gathers energy, and the cutting resistance also increases. The dense core causes the previous layer of coal to be compressed, resulting in elastic deformation, which actually plays a role in changing the geometric shape of the cutting teeth to the end. When the contact stress of the cutting edge increases to the limit value, the coal powder in the area before the dense core will spray out at high speed, driving small pieces of coal to peel off.
In order to improve the efficiency of coal mining machine cutting teeth, optimization can be carried out from the following aspects:
Optimize the cutting head design. By matching and designing the geometric shape, size, tooth arrangement, geometric parameters, and cutting parameters of the cutting head, each tooth is subjected to equal force, wear and tear, and moves smoothly, thereby improving the efficiency of coal cutting and reducing the wear and damage of the cutting teeth.
Adopting advanced brazing and heat treatment technology. Brazing and heat treatment technology is one of the key technologies to ensure the quality of cutting teeth. By adopting advanced brazing and quenching integrated production lines, we can master the brazing processes required for different raw materials and specifications of cutting teeth, thereby avoiding problems such as alloy head embrittlement and reduced weld strength, and improving the service life and performance of cutting teeth.
Improve the quality of hard alloy heads. The quality of hard alloy cutting teeth is directly related to their service life and performance. By using high-quality hard alloy materials and advanced production processes, the hardness and wear resistance of the cutting teeth can be improved, thereby extending their service life.
In summary, optimizing the design of the cutting head, adopting advanced brazing and heat treatment technologies, and improving the quality of the hard alloy head can all improve the efficiency and service life of the shearer's cutting teeth.