What is the role of saw card in woodworking sports car band saw machine?

The function of the automatic tensioning device of the saw blade of the woodworking sports car band saw machine is that the woodworking band saw machine will generate heat due to friction when sawing wood, or the wood hardness is different. When the saw blade is stuck to the knuckle or the edge of the saw wheel, the saw blade will automatically set the saw blade. Produces expansion and contraction, keeping the tension of the saw blade balanced.
If there is no automatic tensioning device, the position of the upper saw wheel does not change at any time. At this time, when the saw blade is extended, the tension force will drop, and the saw blade will swing when it is light, which will affect the quality of the saw blade. Or drop the bar; the tension increases when the saw blade shrinks, which will cause the saw blade to crack or break. Therefore, in order to solve the possibility of the above situation, the band saw machine will have an automatic blade tensioning device, mainly to protect the blade.
There is a device called saw card on the woodworking band saw machine. It is an important structure on the band saw. Its main function is to hold the saw blade so that the cutting part of the saw blade can maintain linear movement when sawing wood. The saw blade is relatively thin, and the stiffness is small. If there is no saw card, the saw wheel will swing and damage the saw blade without controlling the saw blade at high speed.
Saw card structure:
The saw card is generally made of two hard and wear-resistant wooden boards, which are fixed on the base or the lifting arm with bolts, which can be adjusted appropriately according to the width and thickness of the saw blade, so that the saw blade can smoothly cut wood without obvious gap.
The lower saw card installed on the base is fixed when sawing; the upper saw card is installed on the lifting arm of the saw card. When sawing wood, the height of the upper saw card can be adjusted at any time according to the height of the wood.

wood band saw