High-speed spindle on-line automatic balancing experiment system

Abstract

The invention discloses a high-speed spindle on-line automatic balancing experiment system. A spindle is arranged on a spindle positioning seat; a magnetic grid encoder is arranged on a bearing on the inner side of the spindle; displacement sensors are arranged the outer sides of two ends of the spindle; on-line dynamic balance devices are arranged at two ends of the spindle; balance water ponds in the on-line dynamic balance devices are arranged on a spindle rotor; a water gun is fixed on an experiment shock absorption platform; a spindle unbalance simulation devices is fixed on end faces of two sides of the spindle rotor through threads; the displacement sensors are connected with a high-speed synchronous data acquisition instrument through a charge amplifier; a photoelectric sensor is connected with the high-speed synchronous data acquisition instrument; and the magnetic grid encoder is connected with a high-speed synchronous counting card through a 1Vpp signal conditioning module. An industrial control computer is connected with an on-line automatic balancing device controller through a universal serial bus. Through the high-speed spindle on-line automatic balancing experiment system, high-speed spindle on-line automatic balancing experiment can be realized, and the system has the characteristics of high speed, accuracy and integrated level and the like.

Description

technical field [0001] The invention relates to a dynamic balance experiment system, in particular to an online automatic balance experiment system for a high-speed electric spindle. Background technique [0002] With the rapid progress of science and technology, modern machining continues to develop in the direction of high speed and high precision. High speed and high precision machining depends on high-performance CNC machine tools. This also puts forward higher requirements for the spindle as the core component of the machine tool. Due to factors such as machining errors, assembly errors, and uneven distribution of materials, there must be an imbalance in the spindle of the machine tool, which will cause mechanical vibration during the working process of the machine tool, affecting the working life of the machine tool and the machining accuracy of the parts. [0003] Therefore, it is necessary to realize the high-precision dynamic balance control of the high-speed spind...

AI Technical Summary

Problems solved by technology

[0005] (1) The spindle speed of the existing experimental system is low, which cannot meet the needs of high-speed dynamic balance;

[0006] (2) The existing system is often used in the spindle of CNC grinding wheel grinding machine. Due to the large mass of the grinding wheel, the absolute accuracy of the dynamic balance device is low, which cannot meet the needs of high-precision milling spindle dynamic balance;

[0007] (3) The current basic method for dynamic balancing of high-speed spindles is to directly counterweight the unbalanced rotor, which is not only difficult to accurately control the counterweight, but also needs to be stopped for configuration every time, and online unbalance measurement and feedback control cannot be realized;

[0008] (4) The existing dynamic balance experiment system cannot eliminate the data acquisition error introduced by factors such as roundness error and spindle speed fluctuation;

[0009] (5) The temperature change inside the high-speed spindle has a certain influence on the dynamic characteristics of the spindle bearing-rotor, which will lead to a decrease in the calculation accuracy of the dynamic balance method based on the dynamic model, and the existing experimental system cannot achieve the internal temperature of the spindle. real-time measurement;

[0010] (6) The data acquisition process of the system is complex, the data processing is too rough, and cannot be processed and displayed in real time, and the degree of automation is not high

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