Maintenance and maintenance of sawing machine spindle parts

The maintenance and maintenance of the main shaft components of the sawing machine mainly include: the maintenance and maintenance of the main shaft components of the sawing machine, the feed transmission mechanism, and the guide rail. Specific maintenance and maintenance are as follows:

First, the maintenance and maintenance of spindle components

The main shaft component is an important part of the mechanical part of the CNC sawing machine, which is mainly composed of the main shaft, the bearing, the spindle stop device, the automatic clamping and the chip removal device.

The lubrication, cooling and sealing of the spindle components of the CNC sawing machine are several issues that deserve attention during the use and maintenance of the sawing machine.

First of all, a good lubrication effect can reduce the working temperature of the bearing and prolong its service life. For this reason, it should be noted in operation and use: at low speed, use grease and oil circulating lubrication; at high speed, use oil mist and oil-air lubrication. However, when grease lubrication is used, the enclosed amount of the spindle bearing is usually 10% of the bearing space volume. Do not fill it up at will, because too much grease will increase the spindle heat. For oil circulating lubrication, check the spindle lubrication constant temperature oil tank every day during operation to see if the oil is sufficient. If the oil is insufficient, add lubricating oil in time; at the same time, pay attention to check whether the lubricating oil temperature range is appropriate.

In order to ensure good lubrication of the main shaft, reduce friction and heat generation, and at the same time take away the heat of the main shaft components, a circulating lubrication system is usually used, a hydraulic pump is used for strong lubrication, and an oil temperature controller is used to control the oil temperature of the tank. The spindle bearing of the high-end CNC sawing machine is lubricated by the high-grade grease sealing method, and it can be used for 7-10 years every time the grease is added. The new lubrication and cooling method 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 spindle is small.

There are two common spindle lubrication methods. The oil-air lubrication method is similar to the oil-mist lubrication method, but the oil-mist lubrication method is to continuously supply the oil mist, while the oil-air lubrication is to send the oil mist into the bearing gap regularly and quantitatively. The oil mist lubrication prevents too much oil mist from polluting the surrounding air. The injection lubrication method is to inject a larger flow of constant temperature oil (3～4l/min per bearing) into the spindle bearing to achieve the purpose of lubrication and cooling. Here, the oil injected with a larger flow rate must be forced to drain by the drain pump instead of returning naturally. At the same time, a dedicated large-capacity high-precision constant temperature oil tank is also used, and the oil temperature variation is controlled at ±0.5℃.

Second, the cooling of the main shaft components is mainly to reduce bearing heat and effectively control the heat source.

Third, the sealing of the spindle components not only prevents dust, chips and cutting fluid from entering the spindle components, but also prevents the leakage of lubricating oil.

There are contact and non-contact seals for the main shaft components. For contact seals using linoleum rings and oil-resistant rubber seals, pay attention to check for aging and damage; for non-contact seals, in order to prevent leakage, it is important to ensure that the return oil can be drained as soon as possible, and to ensure that the return hole is unobstructed .

The sealing structure of the front support of the main shaft

To sum up, in the use and maintenance of the CNC sawing machine, we must attach great importance to the lubrication, cooling and sealing of the spindle components, and carefully do this work.