Saw Blade Structure Type Introduction

Update:09 Sep 2022

Carbide saw blades include most parameters such as tooth profile, angle, number of teeth, saw blade thickness, saw blade diameter, and carbide types. These parameters determine the processing capacity and cutting performance of the saw blade. When choosing a saw blade, the parameters of the saw blade should be selected correctly according to the needs.

Common tooth shapes include flat teeth, cylindric teeth, trapezoidal teeth, and inverted trapezoidal teeth. Flat teeth are the most widely used, mainly used for sawing of ordinary wood. The tooth shape is relatively simple and the saw cut is relatively rough. The flat teeth can make the bottom of the grooved flat during the grooving process. The quality of the cutting edge is better, and it is suitable for sawing all kinds of wood-based panels and veneers. Trapezoidal teeth are suitable for sawing veneers and fireproof boards and can obtain higher sawing quality. Inverted trapezoidal teeth are often used for bottom slot saw blades.

The angle of the saw tooth is the position of the saw tooth 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 faster the cutting. The rake angle is generally between 10-15°. The clearance angle is the included angle between the saw tooth and the machined surface. Its function is to prevent the saw tooth 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°. The wedge angle is derived from the front and back angles. But the wedge angle should not be too small, it plays the role of 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°.

Generally speaking, the more the number of teeth, the more cutting edges can be cut in a unit of time, and the better the cutting performance. However, the more cutting teeth need to use more cemented carbide, the price of the saw blade is higher, but the teeth are too dense. The reduction of the chip volume between the teeth will easily cause the saw blade to heat up; in addition, if there are too many teeth, if the feed amount is not properly matched, the cutting amount of each tooth is small, which will aggravate the friction between the cutting edge and the workpiece and affect the service life of the cutting edge. Usually, the tooth spacing is 15-25mm, and a reasonable number of teeth should be selected according to the material to be sawed.

The thickness of the saw blade, In theory, we hope that the thinner the saw blade is, the better, the sawing is actually consumed. The material of the saw blade and the process of manufacturing the saw blade determine the thickness of the saw blade. When choosing the thickness of the saw blade, the stability of the saw blade and the material to be cut should be considered.

The diameter of the saw blade is related to the sawing equipment used and the thickness of the sawing workpiece. The diameter of the saw blade is small, and the cutting speed is relatively low; the large diameter of the saw blade has higher requirements for the saw blade and sawing equipment, and the sawing efficiency is also high.

A series of parameters such as tooth profile, angle, number of teeth, thickness, diameter, cemented carbide type, etc. are combined to form the overall cemented carbide saw blade. It is necessary to select and match reasonably to give full play to its advantages.