The reason for burning the saw blade is likely to be:
1. Poor heat dissipation. It is best to buy a saw blade with cooling holes, or you can add water or other coolant to reduce the temperature.
2. Too many teeth. Multiple saws have more saw blades, and the resistance is too large. The more teeth there are, the greater the resistance, and the easier it is to burn the saw blades.
3. Poor excretion. The sawdust is not easy to be discharged, and it will also cause local overheating. The equipment must have a good drainage system.
4. Raw materials. Blockboard is inherently very difficult to saw. If the quality of the particleboard is too poor, too many impurities will easily burn the saw blade.

I suggest to analyze the situation you mentioned from the following aspects:
1. Whether the feeding guide rail is seriously worn, and whether the feeding direction is perpendicular to the main shaft.
2. Whether the main shaft bearing is seriously worn.
3. The saw blade becomes dull.
4. Whether there are iron, sand, stuttering and other uneven things in the board.
5. The quality of the saw blade. Stress treatment of saw boards.
The burning of the saw blade occurs in an instant. When the saw blade is working, it is in dynamic balance. During high-speed sawing, the temperature of the saw body is high and the rigidity decreases. If the chip removal is not smooth, the heat dissipation is not good or there is The impact of the foreign body makes the saw blade lose its balance and instantly generates a large amount of frictional heat, which is a vicious circle and burns the saw blade in an instant.