Air static pressure high-speed motorized spindle based on titanium-aluminum alloy mandrel

Abstract

The invention relates to an air static pressure high-speed motorized spindle based on a titanium-aluminum alloy mandrel. The air static pressure high-speed motorized spindle comprises a base, a shell, the mandrel, an axial air bearing, a supporting assembly, a cooling assembly and a wedge-shaped motor assembly. The mandrel is made of titanium-aluminum alloy, and the axial air bearing is connected to the mandrel in a sleeved mode. The supporting assembly is arranged in the shell to support the mandrel, and the cooling assembly is arranged on the outer side of the supporting assembly. The wedge-shaped motor assembly comprises a stator assembly and a rotor assembly, the stator assembly is fixedly connected with the supporting assembly, and the core shaft is sleeved with the rotor assembly. The wedge-shaped motor assembly generates magnetic pulling force perpendicular to the surface of the rotor assembly under the electrified condition, and the resultant force of the magnetic pulling force is parallel to the direction where the mandrel is located. After the wedge-shaped motor assembly is powered on, magnetic pulling force perpendicular to the surface of the rotor can be generated, part of axial force fluctuation, caused by external force, of the mandrel is offset, and the bearing capacity of the axial load of the electric spindle is improved. And the heating value of the thrust plate in the rotating process can be reduced through the magnetic pulling force, and deformation of the motorized spindle is reduced.

Description

technical field [0001] The invention belongs to the technical field of high-speed electric spindles, and in particular relates to an aerostatic high-speed electric spindle based on a titanium-aluminum alloy core shaft. Background technique [0002] Ultra-high-speed machining is an advanced manufacturing technology for machining part blanks at 10 times the conventional cutting speed and feed rate. Studies have shown that when the cutting speed exceeds a certain value, the cutting force and cutting temperature will decrease instead when the speed increases. Its advantages are as follows: good processing quality, high production efficiency, and can process difficult-to-process materials such as hard and brittle. All countries in the world are competing to develop their own ultra-high-speed processing technology, and the successful application has produced huge economic benefits. The electric spindle has the advantages of compact structure, light weight, small inertia and good...

AI Technical Summary

Problems solved by technology

However, the existing electric spindles generally use steel as the spindle material. The steel spindle has a large mass and low resonance frequency, which leads to a limited limit speed. In addition, there are few improvements to the material of the spindle in the current prior art to improve the performance of the electric spindle.

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