How to choose the saw teeth of woodworking saw blade?
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How to choose the saw teeth of woodworking saw blade?
Woodworking saw blades are the most commonly used cutting tools for wood products processing. The quality of woodworking saw blades is closely related to the quality of processed products. Next, I will show you how to choose the right saw tooth.
Commonly used tooth shapes for woodworking saw blades are left and right teeth (alternating teeth), flat teeth, ladder flat teeth (high and low teeth), inverted trapezoidal teeth (inverted cone teeth), dovetail teeth (hump teeth), and rare industrial Level three left and one right, left and right flat teeth, etc.
- The left and right teeth are the most widely used, the cutting speed is fast, and the grinding is relatively simple. It is suitable for cutting and cross sawing various soft and hard solid wood profiles and density boards, multilayer boards, particle boards, etc. The left and right teeth equipped with anti-repulsion protection teeth are dovetail teeth, which are suitable for longitudinal cutting of various boards with tree nodes; the left and right tooth saw blades with negative rake angle are usually used for pasting because of their sharp teeth and good cutting quality. Sawing of panels.
- The flat tooth saw blade is rough, the cutting speed is slow, and the grinding is the simplest. It is mainly used for sawing of ordinary wood, with low cost. It is mostly used for aluminum saw blades with a small diameter to reduce adhesion during cutting, or for grooving saw blades to keep the bottom of the groove flat.
- Ladder flat teeth are a combination of trapezoidal teeth and flat teeth. The grinding is more complicated. It can reduce veneer cracking during sawing. It is suitable for sawing of various single and double veneer wood-based panels and fireproof boards. For aluminum saw blades, in order to prevent adhesion, saw blades with a large number of teeth of ladder flat teeth are often used.
- The inverted ladder teeth are often used in the bottom groove saw blade of the panel saw. When sawing the double-faced wood-based panel, the groove saw adjusts the thickness to complete the grooving of the bottom surface. Prevent edge chipping in the saw edge.
The angle parameters of the saw tooth part are more complicated and the most professional, 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 rake angle, rear angle and 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 angle of the serration is the position of the serration during cutting. The angle of the serration affects the cutting performance. The biggest influence on cutting is the rake angle γ, the relief angle α, and the wedge angle β. The rake angle γ is the cutting angle of the saw tooth. The larger the rake angle, the lighter the cutting. The rake angle is generally between 10-15°C. The clearance angle is the angle between the saw teeth and the machined surface. Its function is to prevent the saw teeth from rubbing against the machined surface. The larger the clearance angle, the smaller the friction and the smoother the processed product. The clearance angle of cemented carbide saw blades is generally 15°C. The wedge angle is derived from the front and back angles. But the wedge angle should not 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, the rear angle α, and the wedge angle β is equal to 90°C.
The correct and reasonable selection of carbide saw blades is of great significance for improving product quality, shortening the processing cycle, and reducing processing costs!
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