Testing system and testing method for dynamic rotation precision of main shaft

Abstract

The invention relates to a testing system and a testing method for dynamic rotation precision of a main shaft. The system adopts the scheme that a worktable is provided with a data acquisition mechanism which is connected with a rotary output shaft of the main shaft through a clamp, the data output end of the data acquisition mechanism is connected with an industrial personal computer through a sensor driving unit, and the main shaft is provided with a coder which is connected with the upper end of the rotary output shaft. The method comprises the following steps: preheating a to-be-tested shaft; acquiring and recording the initial position where data treatment is carried out on the to-be-tested shaft; collecting displacement data of a relative radial capacitive displacement sensor in the rotation process of the to-be-tested shaft and displacement data measured by an axial capacitive displacement sensor and storing the data; calculating a synchronous radial error motion value and an asynchronous radial error motion value; calculating a synchronous heeling error motion value and an asynchronous heeling error motion value; calculating a basic axial error motion value, a residual axial error motion value and an asynchronous radial error motion value; storing the data. All-around system integration is realized by using high-performance modular hardware, so that the dynamic rotation precision of the main shaft is tested.

Description

technical field [0001] The invention relates to a testing system. In particular, it relates to a testing system and testing method for the dynamic rotation accuracy of a main shaft. Background technique [0002] With the continuous development of modern manufacturing industry, machine tool, as a modern "working machine" with high-tech content, is an important basic equipment to realize the modernization of manufacturing technology and equipment manufacturing industry. Its quality, performance and ownership are the measure of a country's industrial modernization level , An important symbol of comprehensive national strength, so it plays a major role in the modernization of the national economy. The spindle unit is an important part of modern metal cutting machine tools. In the field of machine tool manufacturing, the performance requirements for high-speed and high-precision spindles are getting higher and higher. Since the rotation accuracy of the spindle is one of the imp...

AI Technical Summary

Problems solved by technology

At present, there are few spindle dynamic rotation accuracy test products on the market, mainly including Lion Precision from the United States, MTI Instruments and Micro-Epsilon from Germany. Their accuracy can reach the micron or even nanometer level, but the price is extremely expensive. Generally, spindle manufacturers or scientific research The unit is difficult to bear, and there are few domestic products compared with it, and the accuracy is far behind. Therefore, it is of great significance to independently develop a high-precision spindle dynamic rotation accuracy detection system.

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