1. Cutting resistance is too large
The so-called excessive sawing resistance means that in the sawing process, the sawing is heavy, the feeding is laborious, the saw is not penetrated, the boring, and the saw is not eaten. The cause is multiple forces, which will cause the saw to pass too big or Too small, uneven sawing path, unsharp cutting edge or unreasonable tooth profile angle parameters, too small tension, and unequal saw body can cause excessive sawing resistance.
2. The sawing surface is not standard inside and outside
The band saw blade does not follow a straight line during the sawing process, and the inner buckle and outer drum cannot guarantee the quality of the sawn timber. This is caused by uneven tension on both sides of the saw blade or uneven saw body. If the saw blade has a large outside tension and a small inside tension, the saw teeth will tilt outwards after being stressed, so they will be enlarged, and vice versa. If the inside of the saw body is uneven and the friction resistance with the material surface is large, it will also be enlarged. On the contrary, pull small. If it is sometimes enlarged, sometimes small, the saw path is not straight, and the inside and out of the road is not straight, it is caused by uneven tension, loose front mouth, slanted inside and outside of the saw section, or unsharp saw teeth. Material, tooth chipping, flying material, etc.
3, the saw blade is not working properly
Saw blade running abnormally, multi-finger saw blade instability, channeling and falling off, etc. The main reason is that the back of the saw blade is not straight, that is, the saw back is unevenly deflection, or the saw blade is uneven, the shield is loose, and the tension is uneven. If during the sawing process, the saw blade suddenly runs abnormally, shakes and sways, and makes an abnormal sound, it is a sign that the saw blade may break, and emergency measures should be taken immediately to stop the inspection.
4, saw blade crack
The saw blade cracks caused by the defects of the sawing technology, the cracks are mostly near the tooth root, called the tooth root crack, and the cracks are mostly concentrated in the tooth back part, called the tooth back crack, and the cracks are mostly concentrated on the front rib or back rib of the saw body. It is called anterior rib cleft or posterior rib cleft. The cracks are mostly in the middle of the saw body and are called inner cracks. The cracks in the joint part are called connection failure cracks. In addition, there are irregular cracks, that is, the distribution of cracks is irregular.
5. The saw blade "fires"
During the operation of the band saw machine, the saw blade suddenly broke and made a huge noise. The saw machine often called this situation as the saw blade "fire." Saw blade "fire" not only wastes the saw blade, but also damages the sawing machine, affecting production. In serious cases, the life and safety of the sawing machine operator will be endangered, and sufficient attention must be paid.
