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source:Industry News release time:2021-07-05 Article author:Rosit Popular:Air band saw
One, the choice of diameter
The diameter of the saw blade is related to the sawing equipment used and the size 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 places higher requirements on the saw blade and sawing equipment, and the sawing efficiency is also high. The outer diameter of the saw blade is selected according to the different circular saw machine models to use the saw blade with the same diameter.
Circular saw machine
Second, the choice of thickness
The thickness of the saw blade theoretically we hope that the thinner the saw blade is, the better, the sawing is actually a consumption. The outer diameter of the saw blade and the sawing material determine the thickness of the saw blade. If the thickness is too thin, the saw blade is prone to sway and shake when working, which affects the cutting effect. When choosing the thickness of the saw blade, the stability of the saw blade and the material to be cut should be considered. Some special-purpose materials require specific thicknesses and should be used according to equipment requirements, such as grooving saw blades.
Three, the choice of aperture
The aperture is a relatively simple parameter, which is mainly selected according to the requirements of the equipment. At present, the standard aperture of domestic design is 32MM, and some imported equipment also have 25.4MM apertures. Regardless of the size of the hole, it can be modified by a lathe or a wire cutting machine. The lathe can be turned into a gasket with a large hole, and the wire cutting machine can expand the hole to meet the requirements of the equipment.
Fourth, the choice of the number of teeth
The number of teeth of the saw tooth, generally speaking, the more the number of teeth, the more cutting edges can be cut in a unit time, the better the cutting performance, but the tooth is too dense, the chip volume between the teeth becomes smaller, and it is easy to cause the saw blade to heat up; in addition, too much saw tooth , When the feed amount is not matched properly, 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. If the saw teeth are too thin, the distance between the teeth will be large, and the impact between the cutting edge and the workpiece will be large, which will cause the saw blade to jump and affect the service life of the blade. A reasonable number of teeth should be selected according to the material to be sawed.
Five, the choice of tooth shape
The tooth profile includes angle teeth, curved back teeth, left and right teeth (alternating chamfers), high and low teeth, and rare combination teeth. The combined tooth is a combination of two tooth shapes, and the grinding is more complicated. The most commonly used are left and right teeth.
Six, the choice of sawtooth angle
The angle parameters of the sawtooth part are more complicated and professional, and the correct selection of the angle parameters of the sawtooth is the key to determining the quality of sawing. The main angle parameters are the front angle and the back angle. The rake angle is the cutting angle of the saw tooth. The rake angle mainly affects the force consumed by sawing the material. The larger the rake angle, the better the cutting sharpness of the saw tooth. The lighter the cutting, the more labor-saving the feed. Generally, when the material to be processed is soft, choose a larger rake angle, otherwise, choose a smaller rake angle. 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 cut. The chamfer cannot be too small, it plays a role in maintaining the durability and heat dissipation of the tooth. The angle of the saw tooth is the position of the saw tooth during cutting, and the angle of the saw tooth affects the performance of the cutting. Seven, a series of parameters such as the diameter, thickness, aperture, number of teeth, tooth profile, angle, etc. of the saw blade are combined into the whole of the saw blade. It is necessary to select and match reasonably to give full play to its performance.
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