What are the selection criteria for CNC machine tool spindle bearings? The editor summarizes the following for everyone: 1. Service life and bearing capacity For general CNC lathes, the purpose of the service life of the main shaft components is to refer to the service life for maintaining the accuracy of the main shaft. life needs. For heavy-duty machine tools or ultra-powerful drilling CNC lathes, the bearing capacity of the bearing should be considered first. 2. Stiffness and shock resistance In order to ensure the production quality of the equipment, the spindle system must have sufficient stiffness, otherwise it will cause large reflection deviation and even chatter. Shock resistance refers to the ability to resist forced vibration and self-excited vibration. The vibration resistance of the spindle components lies in the bending stiffness and vibration damping of the spindle and bearings. The use of torque rotation bearings can effectively increase the bending stiffness of the spindle system. 3. Noise In the fast CNC grinding machine, the noise of the grinding wheel bearing is the main component of the noise of the whole equipment, and low-noise flip bearings should be selected. Fourth, the performance requirements of CNC lathe spindle bearing oil CNC lathe spindle bearing oil is a special type of grease for precision machinery and similar equipment spindle bearings. It plays a very important role in ensuring the working accuracy and performance of the spindle and extending its service life. The effect, also known as bearing oil. Its key performance requirements include: 5. The viscosity that suits you and maintains a good viscosity-temperature characteristic is to prevent the ambient temperature of the spindle bearing of the CNC lathe from being too high, which will cause thermal deformation of the CNC lathe, affect the production and processing accuracy or make the bearing lubrication poor. According to the main shaft bearing structure, speed ratio and bearing clearance, the lubricating grease suitable for the ambient temperature should be selected and have good viscosity-temperature characteristics, so as to avoid damage caused by excessive viscosity changes due to the main shaft operating temperature and temperature changes. its lubricating properties. 6. Excellent lubricity In order to maintain a uniform oil slick between the contact area between the main shaft and the bearing, and the oil slick will not be damaged when the main shaft runs or stops moving to generate impact loads, and maintains stable lubricating performance to reduce friction And friction heat, reduce spindle temperature rise, ensure the effect of production and processing accuracy, need to have excellent lubricating performance. 7. Excellent anti-oxidation When the CNC lathe spindle adopts the lubrication method of the circulation system, it is stipulated that the spindle bearing oil will be used for a long time without qualitative change, so it needs to have excellent anti-oxidation. 8. Excellent anti-corrosion property Considering that it is difficult for the refined oil to infiltrate into the condensed water in the air or the coolant of the CNC lathe when the spindle air intake system is working, the refined oil is required to have excellent anti-corrosion property. Only when the torque is accurate can the rotation be stable! (http://)
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