Rational use of the hottest carbide saw blade

Rational use of cemented carbide saw blades

cemented carbide saw blades are the most commonly used cutting tools for wood products processing. The quality of cemented carbide saw blades is closely related to the quality of processed products. Correct and reasonable selection of cemented carbide saw blades is of great significance to improve product quality, shorten processing cycle and reduce processing cost. Jinfengli cutting tools (Shenzhen) Co., Ltd. has a history of producing saw blades for more than ten years, and has a full set of production lines and production technology in Germany. In order to adapt to the Yangtze River Delta regional line and production technology. In order to adapt to the business development in the Yangtze River Delta, the Shanghai Sales Office of jinfengli cutting tools (Shenzhen) Co., Ltd. opened last month. This magazine asks manager Han of the company's Shanghai Distribution Office to answer some questions about the selection and use of hard alloy saw blades at present

what should we pay attention to when selecting cemented carbide saw blades

cemented carbide saw blade includes tooth shape, angle, number of teeth, thickness of saw blade, diameter of saw blade, type of cemented carbide and other parameters. These parameters determine the processing capacity and cutting performance of saw blade, but its implementation needs to be strengthened. When selecting the saw blade, the parameters of the saw blade should be selected correctly according to the needs

tooth profile. The commonly used tooth profiles include flat teeth, bevel teeth, trapezoidal teeth, inverted trapezoidal teeth, etc. (Fig. 1). Flat teeth are the most widely used and are mainly used for sawing ordinary wood. This kind of tooth shape is relatively simple and the saw mouth is relatively rough. When slotting process is operated, the flat teeth can make the groove bottom flat. The cutting quality of bevel saw is relatively good, which is suitable for sawing all kinds of wood-based panels and veneers. Trapezoidal teeth are suitable for sawing veneers and fireproof boards, and can obtain high sawing quality. Inverted trapezoidal teeth are often used in bottom grooved saw blades

the angle of the serration is the position of the serration during cutting. The angle of sawtooth affects the cutting performance. The biggest influence on cutting is the rake angle γ、 Posterior horn α、 Wedge angle β。 Anterior horn γ It is the cutting angle of the serration. The larger the rake angle is, the lighter the cutting is. The rake angle is generally between °. The back angle is the included angle between the saw tooth and the machined surface. Its function is to prevent friction between the saw tooth and the machined surface. The larger the back angle is, the smaller the friction is, and the smoother the processed product is. The back angle of cemented carbide saw blade is generally 15 °. The wedge angle is derived from the front angle and the rear angle (Figure 2). However, the wedge angle should not be too small. It plays a role in maintaining the strength, heat dissipation and durability of the teeth. Anterior horn γ、 Posterior horn α、 Wedge angle β The sum of the three is equal to 90 °

the number of teeth of the sawtooth. Generally speaking, the more teeth, the more cutting edges to be cut in unit time, the better the cutting performance. However, if the number of cutting teeth is large and the number of cemented carbide is large, the price of the saw blade is high, but if the sawtooth is too dense, the chip volume between the teeth becomes smaller, which is easy to cause the saw blade to heat up; In addition, there are too many serrations. If the feed is not matched properly, the cutting amount of each tooth is very small, which will aggravate the friction between the edge and the workpiece and affect the service life of the blade. Generally, the tooth spacing is mm, and a reasonable number of teeth should be selected according to the sawing material

thickness of the saw blade theoretically, we hope that the thinner the saw blade, the better. Sawing is actually a consumption. The thickness of the saw blade is determined by the material of the saw blade and the process of manufacturing the saw blade. When selecting the thickness of the saw blade, we should consider the stability of the saw blade and the sawing material

the diameter of the saw blade is related to the requirements of the sawing equipment used, such as the experimental fixture, and the thickness 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 requires high requirements for the saw blade and sawing equipment, and the sawing efficiency is also high

a series of parameters such as tooth shape, angle, number of teeth, thickness, diameter, type of cemented carbide and so on are combined to form the whole of the cemented carbide saw blade. It is necessary to select and match reasonably in order to give better play to its advantages

what should be added to the various parameters of cemented carbide saw blades

cemented carbide saw blades use standard force measuring rings to test the load accuracy of four ball machines. It is impossible for manufacturing enterprises to make so many specifications of saw blades. According to the optimization rule, the specification series of commonly used cemented carbide saw blades are formed according to the current equipment, materials and other specific factors of wood processing enterprises. This is not only conducive to our selection of cemented carbide saw blades, but also conducive to the large-scale production of alloy saw blade manufacturing enterprises

generally, the left and right teeth should be selected for sawing particleboard and medium density board, and the flat ladder teeth (flat teeth, trapezoidal teeth combination) should be selected for sawing veneer and fireproof board. The outer diameter of the saw blade depends on different circular saw machine models Ф Mm mostly, and the thickness of the saw blade is related to the diameter. Ф Mm thickness 3.2mm, Ф 3.5mm above 350mm

due to the large cutting rate of the computer cutting saw, the diameter and thickness of the cemented carbide saw blade used are relatively large, with a diameter of about mm and a thickness of 4 Between 8mm, most of them adopt flat ladder teeth to reduce edge collapse and saw marks

the alloy saw blade for sawing solid wood usually uses the left and right tooth shapes formed by the combination of bevel teeth, because the front angle of this combination is large, and the wood fiber tissue can be cut sharply, and the incision is smooth. For slotting to keep the groove bottom flat, use flat tooth profile or left-right flat combined teeth

how to identify high-quality cemented carbide saw blades

cemented carbide saw blade is composed of saw plate and cemented carbide saw tooth. At present, cemented carbide sawteeth are basically imported, and our company adopts Luxembourg cermetal cemented carbide. The alloy particles used in high-quality saw blades are thick and large, because such alloy sawteeth can be grinded for many times and have a long service life. The welding quality of cemented carbide is also very important. The welds should be thin and uniform, so that the sawteeth can bear greater cutting force. The quality of saw blade and saw board is very important. Because the saw blade adjusts the rotation, it not only needs to transmit the cutting force, but also maintain the stability of the work. An excellent saw blade has not only static geometric dimensions and accuracy, but also its dynamic characteristics. When the saw blade cuts continuously, the heat generated by alloy saw tooth cutting will be transmitted to the saw plate, raising the temperature of the saw plate. In this case, the high-quality saw plate can still maintain the accuracy of the statement, while the poor saw blade will warp the saw plate, affecting the sawing accuracy. The dynamic stability of the saw blade is particularly important for the precision of several saw blades used in groups. How can the quality of longitudinal cutting be guaranteed when a group of unstable saw blades are used in multi blade sawing equipment. Saw plate and blade are integral parts of high-quality saw blade

how to improve the service life of cemented carbide saw blades

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