Processing machines for levelling, tensioning and straightening band saws of band saw blades
Levelling refers to the process of eliminating irregularities (dents/bumps) in the saw blade. This is usually carried out as the first maintenance work. After being located with a straight edge, dents can be "hammered out" using a ball or club hammer, whereby the weight of the hammer must be matched to the blade thickness.
The following guidelines apply when doing this:
Hammer weighing 1250 g for blade thicknesses ≤ 1.65 mm
Hammer weighing 1500 g for blade thicknesses > 1.65 mm
Hammers should have soft, rounded striking surfaces so that they do not leave any imprints on the blades, as this could negatively impact on the service life of the blade.
Tensioning or stretching means extending the middle zone of the saw blade. This is carried out by rolling using a rolling machine. By stretching the middle zone, the toothing side and the rear edge become shorter in relation to the middle. As a result, when fitting the saw blade to the rollers in the sawing machine, the compressive stresses are released and the saw blade forms a curve in the middle. This prevents the saw blade from shifting back and forth at the most convex contact surface of the roller.
LEVELLING, TENSIONING AND STRAIGHTENING BAND SAW BLADES
R410-R510 / WVB360
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