Maintenance of mechanical part of metal band sawing machine horizontal band saw (2)


In order to ensure that the main shaft of the metal band sawing machine horizontal band saw has good lubrication, reduce friction and heat, and at the same time take away the heat of the main shaft assembly, the circulating lubrication system is usually used. The hydraulic pump is used for strong oil supply lubrication, and the oil temperature controller is used to control the oil temperature of the oil tank. The spindle bearing of high-grade CNC sawing machine is lubricated by high-grade grease sealing, and each time the grease is added, it can be used for 7-10 years.
The new lubricating cooling mode not only reduces the temperature rise of the bearing, but also reduces the temperature difference between the inner and outer rings of the bearing to ensure that the thermal deformation of the main shaft of the sawing machine is small.
There are two common lubrication modes of the main shaft of the sawing machine. The oil-gas lubrication mode is similar to the oil mist lubrication mode, but the oil mist lubrication mode is to continuously supply oil mist, while the oil-gas lubrication mode is to regularly and quantitatively send oil mist into the bearing gap. This not only realizes oil mist lubrication, but also avoids polluting the surrounding air due to too much oil mist.
The injection lubrication method is to inject a large flow of constant temperature oil (3-4l / min for each bearing) into the main shaft bearing to achieve the purpose of lubrication and cooling. The oil injected at a large flow rate here must be forced to drain by the drain pump instead of natural backflow. At the same time, the sawing machine shall also adopt a special large capacity and high-precision constant temperature oil tank, and the oil temperature variation shall be controlled at ± 0.5 ℃


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