How to Purchase High-Quality Coal Mining Cutter Teeth?

With the rapid development of the domestic coal mining industry, the demand for coal mining machines is also on the rise. Particularly in recent years, the demand for coal mining machines has increased year by year. Consequently, the demand for coal mining machine picks is also growing. In coal mining and tunneling projects, mining picks are one of the mechanical components prone to wear, serving as the primary tools for coal extraction and crushing. Coal mining machines can help enterprises carry out work more efficiently. Coal mining machine picks are consumables; in addition to choosing good materials during use, attention must also be paid to daily maintenance and care.

Coal mining machines are not widely understood by non-experts, and procurement personnel often face the challenge of not knowing how to choose when purchasing cutting teeth. In reality, selecting cutting teeth for coal mining machines is not particularly difficult. As long as we understand and pay attention to the following aspects of the machine's characteristics, we can choose the appropriate cutting teeth.

Selection Tips for Coal Mining Shear Teeth

Do not purchase pick teeth with excessive graphite impurities.

Graphite impurities are a significant issue, as excessive impurities can result in insufficient hardness of the cutting teeth, leading to breakage and fracturing. This is not an exaggeration; such occurrences are relatively common during actual usage.

Many manufacturers, in an effort to cut down on coal mining costs, often neglect the selection of pick teeth, leading to the purchase of lower-quality coal mining pick teeth. These pick teeth are typically produced by obscure domestic factories, containing a high amount of graphite impurities and uneven grain distribution. This results in insufficient hardness of the coal mining pick teeth, causing them to enter a high-stress state during use. When encountering hard coal, rocks, and other objects, the pick teeth are prone to cracking.

2. High stress leads to chisel fracturing

Most coal mining shearer tooth manufacturers currently use copper-zinc solders. This material's welding temperature typically reaches over 900 degrees Celsius, resulting in a high expansion coefficient between metals, leading to significant tensile stress. During the use of coal mining shearer teeth, due to the high temperatures produced by the teeth, the tensile stress from these copper-zinc solders causes the teeth to bear considerable loads. Some of the stress comes from the harder coal mines where the teeth are used, and the rest is from the inherent tensile stress, making tooth fracturing more likely.

Section II: Quality of Coal Mining Shears' Cutting Teeth

The quality of the cutting teeth is a crucial criterion for selection. Higher quality cutting teeth on coal-cutting machines result in better performance. The choice of cutting teeth primarily ensures coal mining and rock-breaking operations without disrupting the coal mining process, thus, attention should be given to the quality of cutting teeth when selecting them.

During the cutting of coal and rock by a coal mining shearer, the surface temperature of the cutting teeth increases due to the effects of friction and impact forces. In such an environment, the cutting teeth material must possess excellent wear resistance and impact performance to operate more effectively.