How to choose the suitable carbide circular saw blade?
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How to choose the suitable carbide circular saw blade?
Carbide saw blades are widely used in the wood processing industry because of their high hardness, impact resistance, abrasion resistance, and the ability to maintain normal cutting ability at high temperatures.
Proper use of cemented carbide saw blades can reduce the number of sharpening times, improve the surface quality, and achieve the purpose of using saws instead of planing, thereby improving work efficiency and material yield.
It is often seen that the two English letters Y and G are printed on the surface of cemented carbide saw blades. They represent the commonly used types of cemented carbides: tungsten-cobalt (code YG) and tungsten-titanium (code YT). Because tungsten-cobalt-based cemented carbide has better impact resistance, it is more widely used in the wood processing industry. The commonly used model in wood processing is YG8-YG15. The number after YG indicates the percentage of cobalt content. As the cobalt content increases, the impact toughness and flexural strength of the alloy will increase, but the hardness and wear resistance will decrease. Choose according to the actual situation.
How to choose a carbide circular saw blade?
The actual selection of carbide circular saw blades should consider specific issues such as the type of material to be sawed, thickness, sawing speed, sawing direction, feeding speed, and sawing path width. These problems ultimately boil down to the selection of the saw blade’s tooth profile, angle and other parameters. The following is a brief introduction to the selection of the saw blade’s geometric parameters:
Selection of saw blade tooth type
The tooth type of the circular saw blade is divided into left and right teeth, tapered teeth, flat teeth, trapezoidal teeth, crescent teeth, etc. In actual use, the choice is mainly based on the type of raw material being sawed.
- The left and right teeth are suitable for opening and horizontal sawing of various soft and hard materials and particle boards. The left and right teeth equipped with anti-repulsion protection teeth are suitable for longitudinal cutting of various boards with tree nodes. The left and right tooth saws with negative rake angles Because of the sharp saw teeth and good cutting quality, the blade is usually used for sawing of veneer panels.
- Tapered teeth are often used in the slot saw blades of panel saws. When sawing double-faced wood-based panels, the slot saw completes the grooving of the bottom surface, and the main saw completes the sawing of the board to prevent the saw from breaking Ballast phenomenon.
Flat teeth are mainly used for sawing of ordinary wood. This kind of saw blade has a lower cost, but the saw blade is rough.
- The combination of trapezoidal teeth and flat teeth can also obtain higher cutting quality without grooved saw blades, and there will be no veneer cracking during sawing. It is suitable for the sawing of various double veneer wood-based panels.
The choice of serration angle
The angle parameters of the saw tooth part are more complicated, and the correct selection of the angle parameters of the saw blade is the key to determining the quality of the sawing. The most important angle parameters are the rake angle, the rear angle and the wedge angle.
The rake angle mainly affects the force consumed by sawing wood chips. The larger the rake angle, the better the sharpness of the saw tooth cutting, the lighter the sawing, and the more labor-saving pushing the material. Generally, when the material to be processed is soft, choose a larger rake angle, otherwise, choose a smaller rake angle.
The above sharing, I hope to help you when purchasing!
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