A multifunctional built-in dynamic and static piezoelectric spindle for high-efficiency high-speed precision machine tools

Abstract

The invention relates to a multi-functional built-in dynamic-static-pressure motorized spindle for an efficient high-speed precision machine. The multi-functional built-in moving piezo spindle comprises a shell, a spindle body, a bearing, an oil sealing cover, a motor rotor and a stator. A front bearing is arranged at the right end of the shell and forms a static-pressure push bearing with the spindle. The inner surface of the front bearing is provided with a static-pressure oil cavity, and part of the large diameter of the inner surface matches with a pre-tightening piston. A rear bearing is mounted in a rear-bearing seat. The motor rotor is arranged between the front bearing and the rear bearing. The outer cylindrical face of the motor stator matches with a water sleeve tightly. The water sleeve matches with a hole in the middle of the shell and is connected to the shell. The rear bearing is sealed through a gas sealing ring, and the front bearing is sealed through the oil sealing cover and a gas sealing hole at the rear end. Heat shielding devices are arranged at two ends of the motor stator. The spindle can be mounted at different positions according to different using conditions. The multi-functional built-in dynamic-static-pressure motorized spindle can serve as a spindle of a grinding wheel of a precision machine, a milling center or a grinding machine or a spindle of a workpiece, and has the advantages of high precision, high rigidity, long service life, fine producing process, good sealing effect and the like.

Description

technical field [0001] The invention belongs to the field of machine tools, in particular to a multifunctional built-in dynamic and static piezoelectric spindle for high-efficiency, high-speed and precision machine tools. Background technique [0002] With the rapid development of science and technology, the requirements for the machinery manufacturing industry are increasing day by day, requiring machine tools to develop in the direction of high precision, high efficiency and high speed. The requirements for the machine tool spindle as the core kinetic energy component of high-precision and high-efficiency machine tools are increasing day by day. In order to meet the requirements of high speed, the electric spindle with the spindle directly mounted on the rotor has gradually replaced the belt-driven spindle and has gained more and more applications. [0003] The bearings that determine the motion accuracy of the spindle are divided into two categories according to the fric...

AI Technical Summary

Problems solved by technology

[0009] The general disadvantages of the dynamic and static pressure spindle with the above structure are: the performance of the end thrust bearing is poor, and the high requirements cannot be met due to the influence of the precision of parts processing and assembly, and the centrifugal force at high speed makes the pressure of the thrust bearing oil chamber not well maintained. , the sealing of coolant and oil cannot be guaranteed

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