Testing and analyzing system for rotating errors of main shaft

Abstract

The invention discloses a testing and analyzing system for rotating errors of a main shaft. The testing and analyzing system comprises a hardware part and a software part, wherein the hardware part comprises a bracket or magnetic stand, laser displacement sensors, signal connecting wires, a signal adapter plate and a signal acquisition card, wherein the bracket or magnetic stand is fixedly arranged on the main shaft; the laser displacement sensors and the bracket or magnetic stand are connected to acquire axial displacement runout of the main shaft; the signal output end of each laser displacement sensor is connected with the input end of the signal acquisition card through the signal connecting wire and the signal adapter plate; the signal adapter plate is used for outputting more than two laser displacement sensors according to a unified format; a software system is arranged on a computer; the computer communicates with the output end of the signal acquisition card by using testing software, acquires a displacement signal of each laser displacement sensor, then performs analysis processing on a filtering algorithm and a separation algorithm and separates and displays roundness error and rotating error. According to the testing and analyzing system disclosed by the invention, the roundness error and the rotating error of the main shaft can be acquired quickly and accurately; the testing is simple and practical.

Description

technical field [0001] The invention belongs to the technical field of spindle rotation error testing, in particular to a spindle rotation error testing and analysis system. Background technique [0002] Spindle rotation error is a key index to measure the dynamic performance of the spindle, which directly affects the machining motion of the machine tool and the surface quality of the machined workpiece. Relevant research results show that: about 30% to 70% of the roundness error of high-speed high-precision machine tool turning is caused by the rotation error, and the higher the accuracy of the machine tool, the higher the proportion of the rotation error. By testing the rotation error motion of the spindle, the minimum shape error and surface roughness of the workpiece under ideal processing conditions can be predicted; and according to the characteristics of the rotation error, the operating status of the machine tool can be judged and fault diagnosis can be performed. A...

AI Technical Summary

Problems solved by technology

[0003] The traditional rotation error measurement method, such as measuring the radial runout with a dial gauge, cannot separate the rotation error of the spindle from the roundness error. Later, a test rod or a standard ball is used to eliminate the roundness error, but their shape error ratio is required to be The rotation error of the measuring spindle is at least one order of magnitude higher. For high-speed and high-precision spindles, the shape error and rotation accuracy of the spindle are often in the same order of magnitude and cannot be ignored. Therefore, error separation technology is required to separate the roundness error from the rotation error.

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