Woodworking Band Saw Blade Open-Tooth Machining Process and Precautions for Opening

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Open tooth processing technology

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3. The toothed band saw blade open tooth processing technology includes: punching tooth, milling tooth and grinding tooth.

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Red teeth

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The toothed band saw blade has high processing efficiency but low precision and is generally used for woodworking band saw blades. With the continuous improvement of the use of band saw blades, toothed band saw blades will gradually be replaced by tooth milling and tooth grinding band saw blades.

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Milling teeth

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Milled tooth band saw blade is currently the most widely used. Milling tooth band saw blade is the use of molding cutter to mill the steel band to get the corresponding sawtooth shape. Milling machining accuracy is high, and the difference in saw tooth height can be controlled at 0.05-0.1mm. The processing cost is between the punching and grinding teeth. During the milling process, the milling cutters are milled on both sides of the serrations to form the tooth tips. Due to the squeezing deformation of the milling, the tips of the teeth have rounded corners and larger burrs. As the cutter wears, the fillets and burrs increase.

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Grinding teeth

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Grinding teeth are similar to milling teeth. Grinding wheels form grinding tips on both sides of the serrations. However, the squeezing deformation of the grinding process is small, and the sharpened tooth tips are very sharp with almost no burrs. Figure 2 below shows the ground tooth profile seen under the projector. The grinding wheel can be trimmed at any time during the grinding process, so the abrasion of the grinding wheel has little effect on the tooth profile and the difference in the saw tooth height can be controlled at 0.03-0.05 mm. At present, the cost of grinding teeth is high, so most of the band saw blades for metal processing on the market are tooth-milling band saw blades. However, the irreplaceable advantages of the toothed band saw blade make it more and more widely used.

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Band sawing teeth note

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Although the work of the woodworking band saw blade is relatively simple, if it is not done properly, it will cause problems such as saw blade cracks or saw saw bending. So the following notes about several teeth can not be ignored:

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1. Before the tooth sawing of the woodworking band saw blade is started, the automatic gear cutting machine must be commissioned before the teeth are opened.

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2. The punch and die of the gear cutting machine must be sharp and must be occlusal. The clearance is less than 0.1 mm. If the punch is not sharp, the saw tooth is easy to crack and deform. Especially thin saw blades are prone to distortion. Such punches should be ground immediately. If such punches open, apply a hammer to flatten the saw teeth to prevent running saws while sawing.

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3. When the woodworking band saw blade is opened, the saw blade must be in a horizontal state. The surface of the saw blade must be perpendicular to the stamping direction of the punch punch and must not be inclined. At the same time, the edge of the saw blade should be parallel to the guide rail, and the tooth pitch after opening the tooth. The tooth height should be uniform.

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4. When the woodworking band saw saw blade is open, if the manual gear opening machine should leave a 1-1.5 mm grinding allowance, if the automatic opening distance can leave a 0.5-1 mm grinding allowance, too large and small will be Waste of saw blade and wheel. When the opening machine cannot open the teeth according to the provisions, the grinding allowance can be increased, and the correct tooth profile can be ground with a grinding saw.

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5. If the band saw blade has a hard burned portion, the open tooth of the burned portion is shallower than the other portions. When grinding the tooth profile, more grinding is required to burn the tooth opening portion to make the tooth height neat. If the burned part of the teeth is deep, the saw teeth are easily broken.

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6. If any irregularities such as chipping, dents, and serrations are found on the back of the tooth bottom, tooth throat, and teeth during operation, immediately stop the operation and carefully search for the cause.