Carbide saw blades are commonly used in the processing of wood products. The quality of carbide saw blades is closely related to the quality of processed products. Proper and reasonable selection of carbide saw blades is of great significance for improving product quality, shortening cycle time and reducing processing costs. The carbide saw blade includes various types of alloy cutter heads, material of the base body, diameter, number of teeth, thickness, tooth shape, angle, and diameter. These parameters determine the processing capability and cutting performance of the saw blade. When selecting a saw blade, the saw blade should be selected according to the type of sawing material, the thickness, the speed of sawing, the direction of sawing, the feeding speed, and the width of the sawing.
Common types of cemented carbides are tungsten-cobalt (code YG) and tungsten-titanium (code YT). Due to the good impact resistance of tungsten-cobalt cemented carbides, it is more widely used in the wood processing industry.
The model commonly used in wood processing is YG8-YG15. The number behind YG indicates the percentage of cobalt content. The cobalt content increases, the impact toughness and flexural strength of the alloy increase, but the hardness and wear resistance decrease. According to the actual situation, choose.
1. 65Mn spring steel has good elasticity and plasticity, economical material, good heat treatment hardenability, low heating temperature and easy deformation, which can be used for saw blades with low cutting requirements.
2. Carbon tool steel has high carbon and high thermal conductivity, but its hardness and wear resistance decrease sharply when it is heated from 200 °C to 250 °C. The heat treatment deformation is large, the hardenability is poor, and the tempering time is long and easy to crack. Produce economic materials such as T8A, T10A, T12A for tools.
3. Compared with carbon tool steel, alloy tool steel has good heat resistance, good wear resistance, good processing performance, and heat resistant deformation temperature is suitable for manufacturing high-grade alloy circular saw blades from 300 °C to 400 °C.
4. High-speed tool steel has good hardenability, hardness and rigidity, and low heat resistance. It is an ultra-high-strength steel and is thermoplastic and stable for manufacturing high-grade ultra-thin saw blades.
The diameter of the saw blade is related to the sawing equipment used and the thickness of the sawn workpiece. The saw blade has a small diameter and a relatively low cutting speed; the large saw blade diameter is required for the saw blade and the sawing device, and the sawing efficiency is also high. The outer diameter of the saw blade is selected according to the different circular saw models.
The diameter of standard parts is: 110MM (4 inch), 150MM (6 inch), 180MM (7 inch), 200MM (8 inch), 230MM (9 inch), 250MM (10 inch), 300MM (12 inch), 350MM ( 14 inch), 400MM (16 inch), 450MM (18 inch), 500MM (20 inch), etc., the bottom slot saw blade of precision panel saw is designed to be 120MM.
Number of teeth
The number of teeth in the sawtooth, generally speaking, the more the number of teeth, the more cutting edges per unit time, the better the cutting performance, but the number of cutting teeth requires a large number of hard alloys, the price of the saw blade is high, but the sawtooth is too dense. The amount of chip between the teeth becomes smaller, which is easy to cause the saw blade to heat up; in addition, there are too many saw teeth. When the feed amount is improperly matched, the amount of cutting per tooth is small, which will aggravate the friction between the cutting edge and the workpiece and affect 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 sawing material.
The thickness of the saw blade theoretically we hope that the thinner the saw blade, the better, the kerf is actually a kind of consumption. The material of the alloy saw blade base and the process of manufacturing the saw blade determine the thickness of the saw blade, the thickness is too thin, and the saw blade is easy to shake when working, which affects the cutting effect. The thickness of the saw blade should be chosen from the stability of the saw blade work and the material being sawed. The thickness required for some special-purpose materials is also specific and should be used according to equipment requirements, such as slotted saw blades, scribe saw blades, etc.