Bearings are widely used in machine tool bearings.The machine tool spindle has certain technical requirements for bearing.
1. Speed and temperature rise:
With the development of science and technology, the spindle speed of machine tool is getting higher and higher, and the speed range is getting larger and larger. Therefore, the requirement for the stability of high-speed operation of bearing is also getting higher and higher.The temperature rise of spindle bearing is an important factor limiting the bearing speed.In general, the high speed performance of rolling bearing can be improved to a certain extent by correctly selecting bearing type, tolerance class, configuration mode, clearance (pre-load) size, lubricant and lubrication mode.
2. Life and carrying Capacity:
For general machine tools, the life of the spindle component mainly refers to the life of the spindle to maintain the precision. Therefore, the bearing precision maintenance performance is required to meet the requirements of the life of the spindle component.For heavy or strong cutting machine tools, the bearing capacity should be considered first.
3. Stiffness and vibration resistance:
In order to ensure the machining quality of the machine tool, the spindle system must be rigid enough, otherwise it will cause a large reflection error or even flutter.Vibration resistance refers to the ability to resist forced vibration and self-excited vibration.The vibration resistance of spindle assembly depends on the rigidity and damping of spindle and bearing.The rigidity of the spindle system can be improved effectively by using the pre-tightening rolling bearing.
In high speed grinding machine, the noise of grinding head bearing is the main component of the whole machine noise