Circular saw blades have several layers of different colors, and what are the advantages and disadvantages of each.
Selection of types of circular saws; commonly used types of cemented carbide are tungsten-cobalt (code YG) and tungsten-titanium (code YT). Due to the good impact resistance of tungsten and cobalt carbides, they are more widely used in the wood processing industry. The models commonly used in wood processing are YG8-YG15. The number after YG indicates the percentage of cobalt content. With the increase of cobalt content, the impact toughness and flexural strength of the alloy are improved, but the hardness and wear resistance are decreased. Choose according to the actual situation.
1. 65Mn spring steel has good elasticity and plasticity, economical material, good heat treatment hardenability, low heating temperature, easy deformation, and can be used for saw blades that do not require high cutting requirements.
2. Carbon tool steel has high carbon content and high thermal conductivity, but its hardness and wear resistance drop sharply when subjected to a temperature of 200 ℃-250 ℃, the heat treatment deformation is large, the hardenability is poor, and the tempering time is long and easy to crack. Manufacture economical materials for cutting tools such as T8A, T10A, T12A, etc.
3. Compared with carbon tool steel, alloy tool steel has good heat resistance, wear resistance and better handling performance. The heat distortion temperature is 300℃-400℃, which is suitable for manufacturing high-grade alloy circular saw blades.
4. High-speed tool steel has good hardenability, strong hardness and rigidity, and less heat-resistant deformation. It is an ultra-high-strength steel with stable thermoplasticity and is suitable for manufacturing high-grade ultra-thin saw blades.
The diameter of the circular saw; 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 larger the diameter of the saw blade, the higher the requirements for the saw blade and sawing equipment, and the higher the sawing efficiency. The outer diameter of the saw blade is selected according to different circular saw models and the saw blade with the same diameter is used.
The diameters of standard parts are: 110MM (4 inches), 150MM (6 inches), 180MM (7 inches), 200MM (8 inches), 230MM (9 inches), 250MM (10 inches), 300MM (12 inches), 350MM ( 14 inches), 400MM (16 inches), 450MM (18 inches), 500MM (20 inches), etc. The bottom groove saw blades of the precision panel saw are mostly designed to be 120MM.
Selection of the number of teeth of the circular saw; the number of teeth of the saw teeth, generally speaking, the more teeth, the more cutting edges can be cut per unit time, and the better the cutting performance, but the number of cutting teeth requires more carbide, and the price of the saw blade However, if the sawtooth is too dense, the chip capacity between the teeth becomes smaller, which will easily cause the saw blade to heat up; in addition, if there are too many sawtooths, if the feed rate is not properly matched, the cutting amount of each tooth is very small, which will aggravate the cutting edge and the workpiece. Friction affects the service life of the blade. 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 circular saw; the thickness of the saw blade In theory, we hope that the thinner the saw blade, the better, the saw seam is actually a kind of consumption. The material of the alloy saw blade base and the manufacturing process of the saw blade determine the thickness of the saw blade. If the thickness is too thin, the saw blade is easy to 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 sawed should be considered. The thickness required for some special-purpose materials is also specific, and should be used according to the requirements of the equipment, such as slotting saw blades, scribing saw blades, etc.
1. The commonly used tooth shapes are left and right teeth (alternate teeth), flat teeth, trapezoidal flat teeth (high and low teeth), inverted trapezoidal teeth (inverted conical teeth), dovetail teeth (hump teeth), and The rare industrial grade three left and one right, left and right flat teeth, etc.
2. The flat tooth saw is rough, the cutting speed is slow, and the grinding is the easiest. It is mainly used for sawing of common wood, and the cost is low. It is mostly used for aluminum saw blades with smaller diameters to reduce adhesion during cutting, or for grooving saw blades to keep the bottom of the groove flat.
3. Ladder flat tooth is a combination of trapezoidal tooth and flat tooth. Grinding is more complicated. When sawing, it can reduce the phenomenon of veneer cracking. It is suitable for sawing of various single and double veneer wood-based panels and fireproof panels. In order to prevent sticking of aluminum saw blades, saw blades with a large number of flat teeth are often used.
4. Inverted ladder teeth are often used in the bottom groove saw blade of the panel saw. When sawing the double-veneer wood-based panel, the groove saw adjusts the thickness to complete the grooving process of the bottom surface, and then the main saw completes the sawing process of the board, so that the Prevent the saw edge from chipping.
Post time: Sep-23-2022