To achieve high-speed cutting and improve processing efficiency, it is particularly important to develop high-performance machine tool spindles. The performance of high-speed machine tools during operation depends on many factors. How to control the rise in spindle temperature and improve the life of spindle bearings when the spindle is running at high speed requires studying the source of the rise in spindle temperature and what kind of lubrication and cooling methods can be used effectively. Solve the problem of rising spindle bearing temperature.
1. Friction and lubrication of high-speed bearings
The friction of the bearing is the movement resistance between the internal components when the rolling elements and the inner and outer rings move. According to the principle of friction and its mechanism analysis, rolling friction is the friction that occurs between the rolling elements and the rings. The rolling elements and the cage will produce friction. In addition, friction will also occur between the roller end surface and the retaining ring edge. The viscosity of the lubricating oil Causes internal molecular friction, etc. These frictions are the main factors affecting bearing damage and failure. Therefore, solving these frictions can improve the efficiency and life of the bearings.
The purpose of bearing lubrication is to form an oil film on the rotating surface to reduce friction and wear, prevent the temperature of the bearing from rising causing damage such as burning, and also to prevent rust and dust.
2. Spindle Bearing
Oil and gas lubrication technology
Oil and gas lubrication technology is the most ideal way to lubricate spindle bearings. In
oil and gas lubrication technology, being able to control the lubricating oil supply is the best way to achieve the best results. An important factor in the lubrication effect. From the data obtained from practical applications, it can be seen that the supply of bearing lubricating oil has an optimal supply amount. When the oil supply amount is at the optimal value, the temperature of the spindle rises minimally. When the oil supply amount is less than the optimal amount, When there is insufficient lubrication, friction will cause the temperature to rise. When the amount of oil supplied exceeds the optimal lubrication amount, internal friction in the oil will generate heat as the amount of oil increases, which will be detrimental to the service life of the bearing.
3. Spindle
Oil and gas lubrication system
Spindle
The oil and gas lubrication system uses multiple tiny plunger pumps to accurately supply oil to the spindle. Lubricating oil is provided at multiple locations for lubrication, and is equipped with a pulse generator to regularly supply air to the plunger pump to achieve the purpose of regular and quantitative oil supply. The lubrication system is equipped with corresponding sensors to monitor oil supply status, air source pressure, Low liquid level, etc. faults are monitored to ensure that the system is working properly. Its fault signal is connected with the machine tool control system to achieve the best protection of the spindle. This Weipu
oil-gas lubrication is the most widely used and best-effective lubrication system among spindle
oil-gas lubrication systems.
\
News