1: What is the difference between 40 teeth and 60 teeth?
The 40-tooth one will save effort and sound less due to its low friction, but the 60-tooth will cut more smoothly. Generally, woodworkers use 40 teeth. If you want a low sound, use a thicker one, but the thin one is better quality. The higher the number of teeth, the smoother the sawing profile and the less noise if your machine is stable.
2: What is the difference between a 30-tooth wood saw blade and a 40-tooth wood saw blade?
The main ones are:
The cutting speed is different.
The gloss is different.
The angle of the teeth of the saw blade itself is also different.
The requirements for the body hardness, flatness, and end jump of the saw blade are also different. In addition, there are some requirements for the speed of the machine and the feeding speed of the wood.
It also has a lot to do with the precision of the saw blade equipment.
①.Alloy circular saw blades are selected for different cutting materials with tooth type and angle.
Of course, any alloy circular saw blade can cut different materials, but the effect or lifespan must be a fatal quality effect. Alloy circular saw blades generally have common tooth type, multi-piece saw tooth type and hunchback tooth type. Ordinary tooth type is for dense teeth or precision cutting, and aluminum profiles. Multi-blade saws are for sparse, grooving or slicing and cutting with fast enough feed. The hump-back teeth are suitable for hard cutting or metal cutting, and have the function of limited depth cutting. Any type of tooth profile design considers the design alloy length and thickness according to the pitch, diameter and cutting force. The width, length and angle of the cooling groove are also very important. The arc of the undercut groove is also directly related to the tooth pitch. The angle of the tooth back must consider the cutting impact force and chip removal. Of course, the thickness of the base body should be reduced by 1 or 0.8 according to the width of the knife edge, so that the base body seat can have a strong impact force.
②. The tool angle depends on the cutting material, but the side angle is basically general, the side relief angle is generally between 2.5°-3°, and the new and old grinding wheels change slightly, but the best side rake angle is 0.75°, the maximum It is not allowed to be greater than 1°. For side angle grinding, a reasonable grinding wheel diameter can be selected according to the thickness of the alloy to obtain a good angle. Of course, when choosing the diameter of the grinding wheel, it is necessary to pay attention to the straight line between the center of the grinding wheel and the edge of the alloy, otherwise the angle cannot be ground, which is related to the operator’s experience or the adjustment of the equipment scale. The process of grinding the left and right sides is critical to the quality of the product. If the alignment or the grinding wheel running track is wrong, the tool cannot be ground well when grinding the back angle or rake angle in the next process, because the congenital deficiency cannot be compensated for the day after tomorrow.
The relief angle is generally 15°, and it can be increased to 18° depending on the cutting material. Generally, the relief angle should not be too large, otherwise the grinding force will be increased, which will cause the grinding wheel fillet to be inaccurate. Of course, if the clearance angle increases, the tool is sharp, but the wear resistance is poor. On the contrary, the wear resistance is good. The clearance angle depends on your requirements. A slight change will not affect the quality of the tool. However, the flank angle is not suitable for too large, the tool is not wear-resistant, the teeth are easy to break, the grinding wheel is easy to produce rounded corners, and the flank angle is easy to produce arcs. When grinding the side, it must be centered on the saw blade, otherwise it will form a left high or a right low, which will directly affect the service life.
The rake angle is related to the cutting workpiece and cutting speed. The larger the rake angle, the faster the cutting speed, and vice versa. The rake angle of cutting metal materials should not exceed 8°, and the thin metal should be minus 3°. When cutting plastic materials, there must be a rake angle for chip removal. The larger the rake angle is, the main blade on one side is formed, and the other side loses its cutting meaning, so the rake angle is good enough to be 3°, and the maximum rake angle should not be 9°. , Whether the main blade and the auxiliary blade are ground accurately is also the main key factor for the durability of the tool.
③. Vertical and horizontal cutting and fine cutting tooth profile is the key to design. Longitudinal cutting generally requires that the rake angle should not be too large. For transverse cutting, the rake angle should be designed as large as possible. Dry wood is suitable for the former, and wet materials are suitable for the latter. The longitudinal rake angle can be smaller, and the transverse rake angle should be bigger. The tooth type of the saw blade is complex for different types of cutting and suitable for different tooth types, such as single left or single right suitable for single-sided cutting in board factories and plexiglass production lines. The left and right teeth are suitable for various wood processing. Left-right, left-right or left-right, left-right is suitable for fine cutting of wood, wood strips, plexiglass, etc. The ladder leveling is suitable for metal profile processing or hardwood processing, speaker jewelry box, and the angle of the front and rear corners of the electronic saw blade still needs to be increased. The flat teeth are suitable for grooving. Any flat teeth must be carefully ground for the main and auxiliary margins. The sharp teeth and the inverted ladder teeth are suitable for 90° demolition of cabinets or wooden boxes, and electronic circuit boards.
Post time: Aug-05-2022