Six-series of hard alloy saw blades - Precautions

Correctly and reasonably selecting hard alloy saw blades is of great significance for improving product quality, shortening processing cycles, and reducing processing costs. Hard alloy saw blades include parameters such as tooth shape, angle, number of teeth, blade thickness, blade diameter, type of hard alloy, etc., which determine the processing capacity and cutting performance of the saw blade. When selecting a saw blade, the parameters of the blade should be correctly selected according to the requirements.

Tooth shape, common tooth shapes include flat teeth, hooked teeth, trapezoidal teeth, inverted trapezoidal teeth, etc. Flat teeth are the most widely used, mainly used for sawing ordinary wood, this tooth shape is relatively simple, and the saw cut is rough. Hooked teeth have better saw cut quality and are suitable for sawing various engineered boards and veneer boards. Trapezoidal teeth are suitable for sawing veneer boards and fire-resistant boards, and can obtain higher saw cut quality. Inverted trapezoidal teeth are commonly used for bottom groove saw blades.

The angle of the saw teeth is the position of the saw teeth during the cutting process. The angle of the saw teeth affects the performance of cutting. The most significant angles that affect cutting are rake angle γ, clearance angle α, and wedge angle β. The rake angle γ is the cutting angle of the saw teeth. The larger the rake angle, the faster the cutting speed. The front angle is generally between 10-15°. The clearance angle is the angle between the saw teeth and the already processed surface, its function is to prevent friction between the saw teeth and the already processed surface. A larger clearance angle reduces friction, resulting in a smoother cut product. The clearance angle of hard alloy saw blades is generally 15°. The wedge angle is derived from the rake angle and clearance angle. The wedge angle cannot be too small, it plays a role in maintaining the strength, heat dissipation, and durability of the tooth. The sum of the rake angle γ, clearance angle α, and wedge angle β is equal to 90°.

The number of teeth of the saw teeth, generally speaking, the more teeth, the more cutting edges in a unit of time, and the better the cutting performance. However, more teeth require more hard alloy, leading to a higher price of the saw blade. If the teeth are too dense, the chip volume between the teeth becomes smaller, which can easily cause the saw blade to heat up. In addition, if there are too many teeth and the feed rate is inappropriate, the amount of each tooth's cutting is minimal, which can increase friction between the cutting edge and the workpiece, affecting the blade's service life. The tooth spacing is usually 15-25mm, and the number of teeth should be selected according to the material being cut.

In theory, we hope that the thinner the saw blade, the better, as the saw kerf is actually a consumption. The material of the board being cut and the manufacturing process of the saw blade determine the thickness of the saw blade. When selecting the thickness of the saw blade, considerations should be made based on the stability of the saw blade's operation and the material being cut.

The diameter of the saw blade is related to the cutting equipment used and the thickness of the workpiece being cut. A smaller saw blade diameter results in relatively lower cutting speed, while a larger saw blade diameter has higher requirements for the saw blade and cutting equipment, as well as higher cutting efficiency. The combination of parameters such as tooth shape, angle, number of teeth, thickness, diameter, type of hard alloy, etc., makes up the whole of the hard alloy saw blade, and it must be properly selected and matched to fully utilize its advantages.