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A Four-point Dynamic Measurement and Separation Method of Spindle Rotation Error

A technology of rotation error and separation method, which is applied in the direction of measuring device, mechanical bearing test, mechanical component test, etc., can solve the problems of large sampling error and actual measurement difficulty, achieve simplified processing difficulty, eliminate thermal expansion error, and improve measurement accuracy Effect

Active Publication Date: 2019-05-21
XI AN JIAOTONG UNIV
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Problems solved by technology

In addition, when the installation angle between the sensors does not have the least common divisor, there is a large sampling error in the real-time calculation of the single-turn sampling amount between the spindle speed and the sampling frequency
Due to the sensitivity of the error separation result to the sensor installation angle error, many difficulties have been caused to the actual measurement

Method used

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  • A Four-point Dynamic Measurement and Separation Method of Spindle Rotation Error
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  • A Four-point Dynamic Measurement and Separation Method of Spindle Rotation Error

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Embodiment Construction

[0048] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0049] refer to figure 1 , a four-point dynamic measurement and separation method of a spindle rotation error, comprising the following steps:

[0050] 1) Position the sensor bracket and perform system calibration on the high-precision displacement sensor;

[0051] The sensor is installed on the sensor bracket through a high-precision positioning ball, and the opposite position of the sensor is calibrated, so that the positioning displacement between the sensor bracket and the sensor is a fixed value. The sensor bracket is as follows: figure 2As shown; in order to accurately obtain the measurement error and reduce the position deviation, the position of the sensor must be calibrated and measured when the sensor is installed to determine the calibration distance L; after the calibration is completed, the sensor and the sensor bracket will be fixed as...

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Abstract

The present invention provides a four-point dynamic measurement and separation method of spindle rotation errors. A sensor support is positioned, and high-precision displacement sensors are subjectedto system calibration; each two of the four sensors are installed on the sensor support in an opposite mode, a tested part is operated, and a sampling frequency f, single-loop sampling points and sampling duration are calculated according to a rotating speed of the tested part; the displacement sensors are employed to obtain rotation position information of the tested part, and the obtained displacement sampling signals are calculated and analyzed through an error separation formula, and rotation errors and section circularity errors of a rotated shaft are obtained; and the circularity errorsand the rotation errors are subjected to quantification evaluation, and dynamic rotation errors of the tested part in the rotation operation and the shape errors of a tested section contour are obtained. The four-point dynamic measurement and separation method of the spindle rotation errors can reduce the change amount of the shaft section errors caused by thermal deformation, and employs a dynamic separation equation to separate the circularity errors and the rotation errors of the same magnitude so as to accurately obtain the rotation errors of the spindle.

Description

technical field [0001] The invention belongs to the technical field of spindle detection, and in particular relates to a four-point dynamic measurement and separation method of a spindle rotation error. Background technique [0002] The accuracy of the core components of the machine tool determines the overall machining quality of the machine tool to a large extent, and as the most important part of the core components, the rotation error of the spindle system is one of the main factors affecting the machining accuracy of the machine tool. Spindle rotation error is of great significance for the evaluation of spindle rotation accuracy, detection of spindle operation failure, prediction of machine tool surface shape error, and machining error compensation for the purpose of improving the machining accuracy of machine tools. In practice, due to the processing and assembly errors of the spindle and the dynamic and static forces in the rotation process, the rotation axis of the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/04G01B21/20
CPCG01B21/20G01M13/00
Inventor 刘飞王庆鑫罗爱玲梁霖徐光华
Owner XI AN JIAOTONG UNIV
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