Acrylic saw blade manufacturers in-depth analysis of how to choose woodworking saw blade acrylic saw blade manufacturers in-depth analysis of how to choose woodworking saw blade
How to choose woodworking saw blades? Professional acrylic saw blade manufacturers teach you professional methods, as follows:
Introduction to woodworking saw blades Woodworking saw blades are the most commonly used cutting tools for wood products. The quality of woodworking 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 woodworking saw blade includes various types of alloy cutter heads, material of the base body, diameter, number of teeth, thickness, tooth shape, angle, and aperture. 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, thickness, sawing speed, sawing direction, feeding speed and sawing width of the sawing material.
1 Selection of alloy types
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.
2 matrix selection
1. 65Mn spring steel has good elasticity and plasticity, economical material, good heat treatment and 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. Multi-blade saw blade 3. Compared with carbon tool steel, alloy tool steel has good heat resistance, good wear resistance and good processing performance. The 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 the manufacture of high-grade ultra-thin saw blades.
3 diameter selection
The diameter of the saw blade is related to the sawing equipment used and the thickness of the sawed 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 model. 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 diameter of the woodworking saw blade is designed to be between 120MM-400MM.
4 choice of the number of teeth
The number of teeth in the sawtooth, generally speaking, the more the number of teeth, the more cutting edge in a 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 serrations. 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.
5 thickness selection
The thickness of the saw blade is 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 many saw blades are mostly thin.
6 tooth shape selection
The common tooth shapes of woodworking saw blades are left and right teeth (alternating teeth), flat teeth, flat teeth (high and low teeth), inverted trapezoidal teeth (reverse tapered teeth), dovetail teeth (camb teeth), and rare industries. Three left and one right, flat left and right flat teeth, etc. 1. The left and right teeth are the most widely used, the cutting speed is fast, and the grinding is relatively simple. Suitable for cutting and cross sawing various soft and hard solid wood profiles and MDF, multi-layer boards, particle board and so on. The left and right teeth with anti-rebound force protection teeth are swallow-tail teeth, suitable for longitudinal cutting of various boards with tree knots; left and right tooth saw blades with negative rake angle are usually used for sticking due to sharp saw teeth and good sawing quality. The sawing of the panel. 2. The flat tooth saw is rough, the cutting speed is slow, and the grinding is the simplest. Mainly used for sawing of ordinary wood, low cost, mostly used for aluminum saw blades with small diameter to keep the adhesion reduced during cutting, or used to slot the saw blade to keep the bottom of the groove flat. 3. The flat teeth are a combination of trapezoidal teeth and flat teeth. The grinding is more complicated. The sawing can reduce the cracking of the veneer. It is suitable for the sawing of various single and double veneer wood-based panels and fireproof panels. In order to prevent adhesion, the aluminum saw blade also uses a saw blade having a large number of teeth of the flat teeth. 4. The inverted ladder teeth are often used in the saw blade bottom slot saw blade. When sawing the double-faced wood-based panel, the slot saw adjusts the thickness to complete the bottom slotting processing, and then the main saw completes the sawing of the panel. Prevent the chipping of the kerf.
7 sawtooth angle selection
The angle parameter of the sawtooth part is more complicated and professional, and the correct selection of the angle parameter of the saw blade is the key to determining the quality of the sawing. The most important angle parameters are the rake angle, the back angle, and the wedge angle. The rake angle mainly affects the force consumed by sawing sawdust. The larger the rake angle, the better the sharpness of the sawtooth cutting, the lighter the sawing, and the more labor-saving the pushing material. Generally, when the material to be processed is soft, a larger front angle is selected, and a smaller front angle is selected. The angle of the sawtooth is the position of the saw teeth when cutting. The angle of the sawtooth affects the performance of the cut. The greatest influence on cutting is the rake angle γ, the back angle α, and the wedge angle β. The rake angle γ is the plunging angle of the sawtooth. The larger the rake angle, the lighter the cutting. The rake angle is generally between 10-15 °C. The back angle is the angle between the sawtooth and the machined surface. The function is to prevent the sawtooth from rubbing against the machined surface. The larger the back angle, the smaller the friction and the smoother the processed product. The relief angle of the carbide saw blade is generally 15 °C. The wedge angle is derived from the front and back corners. However, the wedge angle should not be too small, and it plays a role in maintaining the strength, heat dissipation and durability of the teeth. The sum of the rake angle γ, the back angle α, and the wedge angle β is equal to 90 °C.
8 aperture selection
The aperture is a relatively simple parameter, mainly selected according to the requirements of the equipment, but in order to maintain the stability of the saw blade, it is better to use a device with a larger aperture for a saw blade of 250 mm or more. At present, the diameter of standard parts designed in China is 20MM holes for 120mm and below, 25.4MM holes for 120-230MM, 30 holes for more than 250, and 15.875MM holes for some imported equipment. Relatively complex, there are many keyways to ensure stability. The aperture is also available from 20MM-120MM. Of course, regardless of the aperture size, it can be modified by lathe or wire cutter. The lathe can be sleeved in the large aperture, and the wire cutter can be reamed to meet the requirements of the equipment. A series of parameters such as the type of alloy cutter head, the material of the base, the diameter, the number of teeth, the thickness, the tooth shape, the angle, and the aperture are combined into a whole hard alloy saw blade. It is necessary to select and match it reasonably to better exert its advantages.
Since the main material consists of tungsten steel, it is also called tungsten steel saw blade. The carbide saw blade includes various types of alloy cutter head, material of the base, 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, it is necessary to select the woodworking saw blade correctly according to the type, thickness, sawing speed, sawing direction, feeding speed and sawing width of the sawing material.
Dongguan Yibao Knife Saw Factory specializes in the production and operation of various machine alloy saw blades, including plexiglass special saw blades, acrylic saw blades, solid wood cross-cut saw blades, aluminum saw blades, high-speed steel saw blades and so on. The company has more than 10,000 stocks for many years, complete specifications, quality assurance, price concessions!
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