Application examples of gas lubricated bearings in machine tools
Gas lubricated bearings are mainly used for spindle support in machine tools, including workpiece axes, tool axes, grinding wheel shafts, etc. Machine tool spindle bearings generally use two types of hydrostatic bearings and hydrostatic bearings. Wave foil bearings can also be used for small high speed spindles. Gas hydrostatic bearings are the most widely used in machine tools, with small orifice throttling and toroidal throttling bearings being the most common. Porous gas hydrostatic bearings have been increasingly used in machine tool active static pressure hybrid lubrication bearings in recent years. Floating ring dynamic and static pressure gas bearings are newly developed high-speed gas-lubricated bearings in recent years, which are promising for high-speed spindle support.
Ultra-high-speed air bearing internal grinding heads are now capable of precision grinding of small holes and small holes. The use of air bearings improves the machining accuracy of the machine by 2-3 orders of magnitude, enabling precision mirror machining.
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