The Causes of Wood Bending in Sawmills

The sawn timber is bent for the following reasons:

1. Problems with band saw:

① The tensioning device is not flexible, and the hammer is too light. Generally repair the tensioning device and weight the heavy hammer.

② The rim surface of the saw wheel is worn, and the front and rear diameters are different. Adjust the saw wheel.

2. Problems with band saw blade:

① The tooth shape of the band saw blade is not correct, the tooth chamber is too small, and the saw blade is narrow and biased. Correct the tooth shape, increase the tooth chamber, and adjust and increase the saw path.

② The tension of band saw blade is uneven, the mouth is loose, and the tension is adjusted.

③ Too many joints of the band saw blade and improper repair. The saw blade shall have as few joints as possible, or the saw blade with many joints shall be specially repaired.

3. Operation problems:

① The upper and lower hand delivery are inconsistent. The upper and lower levels should be concentrated and in step.

② If the saw clamp is too loose or deviated, adjust the saw clamp.

③ The feeding speed is too fast and uneven. The feeding shall be kept stable and decelerated in case of knots.

④ The saw wheel and saw blade stained with resin sawdust shall be removed in time.

⑤ The saw blade is blunt and cannot be used any more. The saw blade is poor and should not be used reluctantly