Machine tool translational shaft geometric error fast measurement method based on laser interferometer
A technology of laser interferometer and measurement method, which is applied in the direction of measuring devices, instruments, and optical devices, etc., which can solve problems such as calibration errors, difficult installation of laser heads and reflectors, and achieve the effect of simple operation
Active Publication Date: 2017-09-05
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
However, in the step-by-step body diagonal method, there is a calibration error between the laser and the mirror, and the installation of the laser head and the mirror is difficult
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[0069] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0070] attached figure 1 Shown is the flow chart of the method for rapid measurement and identification of geometric errors of translational axes based on laser interferometer measurement in the present invention, and the Y-axis of a machine tool is taken as an example to illustrate the method of the present invention.
[0071] Step 1. Determine the initial installation position of the laser interferometer according to the type of translational axis to be measured, and determine the relative positions of laser A and laser B of the laser interferometer, including steps:
[0072] Step 1.1. Determine the Y-axis type of the translational axis to be measured as y;
[0073] Step 1.2, install the laser interferometer so that the straight line where the laser interferometer laser A and laser B are located is perpendicular to the y direction of the mac...
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The invention discloses a machine tool translational shaft geometric error fast measurement method based on a laser interferometer, relating to the numerical control machine tool error measurement identification technology field. The machine tool translational shaft geometric error fast measurement method comprises steps of determining an initial installation position of a laser interferometer, driving a translational shaft, collecting laser interferometer reading on a stroke of the translational shaft, arranging n measurement points which are arranged at equal intervals on the translational shaft stroke, wherein n>2, driving the translational shaft to various measurement points to collect readings of laser A and laser B of the laser interferometer, regulating the laser interferometer to a second installation position at a measurement point p to make a distance L between the second installation position and the initial installation position, driving the translational shaft to collect the laser interferometer readings on the stroke of the translational shaft, calculating translational shaft motion direction linear errors at various measurement points at the measurement point p, and calculating the translational shaft direction linear errors at various measurement points by combining a reading A2 of the laser interferometer laser A at a second installation position and a reading A1 of the laser interferometer laser A at the initial installation position.
Description
technical field [0001] The invention relates to the technical field of error measurement and identification of numerical control machine tools. Background technique [0002] Geometric error is the main error source affecting the machining accuracy of machine tools, and compensating for geometric errors of machine tools has become an important means to improve the machining accuracy of machine tools. The measurement and identification of geometric error elements is the basis of geometric error compensation technology and one of the prerequisites for accuracy improvement. [0003] The existing technology needs to be further improved in terms of speed and completeness when measuring and identifying the geometric error elements of the motion axis. In practice, the 9-line method and 12-line method based on laser interferometers are mostly used to measure the errors of multiple lines in the workspace to solve the geometric error elements of the translation axis, which requires mu...
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IPC IPC(8): G01B11/00
Inventor 付国强谷腾达高宏力宋兴国曹中清
Owner SOUTHWEST JIAOTONG UNIV