How to buy a good coal cutter heads?

Non professionals are not very familiar with coal mining machines, and when purchasing picks, procurement personnel also face the problem of not knowing how to choose. In fact, it is not very difficult to choose the cutting teeth of a coal mining machine. As long as we understand and pay attention to the characteristics of the coal mining machine in the following aspects, we can choose the appropriate cutting teeth.

Tips for selecting cutting teeth for coal mining machines

1. Do not choose cutting teeth with high graphite impurities.
The main issue is that there are too many graphite impurities, which can cause the hardness of the cutting teeth to not meet the standard, leading to phenomena such as fracture and fragmentation. This is not sensational, but it is common in practical use.
Many manufacturers, in order to save coal mining costs, often do not pay attention to the selection of cutting teeth, so they will choose some low-quality coal mining machine cutting teeth. These cutting teeth are often substandard products produced by unknown domestic manufacturers during the manufacturing process, containing a large amount of graphite impurities and uneven grain distribution, which leads to insufficient hardness of the shearer cutting teeth. In actual use, the shearer cutting teeth will produce a high stress state, and will shatter when encountering hard objects such as coal mines and rocks.
2. High stress causes the cutting teeth to shatter.
At present, most of the coal mining machine cutter manufacturers use copper zinc brazing materials. The welding temperature of this substance can generally reach over 900 degrees, and the coefficient of expansion between its metals is relatively large, resulting in significant tensile stress. During the use of coal mining machine cutting teeth, due to the high temperature generated by the cutting teeth, the tensile stress generated by these copper zinc brazing materials will cause the cutting teeth to be subjected to a significant load. Some of them come from coal mines with strong hardness outside the cutting teeth, while the other part comes from the tensile stress itself, making it easy for the cutting teeth to break.
3. The quality of cutting teeth used in coal mining machines.
The quality of the pick is an important criterion for selecting the pick. The better the quality of the cutting teeth of the coal mining machine, the better its performance. The selection of cutting teeth is mainly to ensure coal mining and rock breaking work, without affecting the coal mining process. Therefore, when selecting cutting teeth, attention should be paid to the quality of the cutting teeth.
When the shearer cutter cuts coal and rock, the surface temperature of the cutter will increase due to friction, impact and other forces. In this environment, the cutting material must have good wear resistance and impact performance in order to work better.