New method for rapidly separating geometric errors of rotating shaft of multi-axis numerical control machine tool
A CNC machine tool and geometric error technology, which is applied to metal processing machinery parts, measuring/indicating equipment, metal processing equipment, etc., can solve the problems of high precision requirements for measuring devices, and achieve improved overall processing accuracy, accurate separation, and high precision Effect
Active Publication Date: 2021-11-05
SOUTHWEST JIAOTONG UNIV
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However, the precision of the measuring device is high
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[0033] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:
[0034] Such as Figure 1 to Figure 4 As shown, the present invention provides a new method for rapid separation of geometric errors of the rotary axes of multi-axis CNC machine tools, including the following steps:
[0035] S1. The precision CNC turntable is installed on the rotating parts of the multi-axis machine tool, and can rotate with the rotating parts of the multi-axis machine tool; the cat's eye is installed on the precision CNC turntable, and can rotate together with the precision CNC turntable.
[0036]S2. Install the laser tracker and the tracker near the front of the machine tool respectively, and define the position of the laser tracker as the base station position. In step S2, at least four base station positions are selected, and any three base station positions are not collinear.
[0037] S3. Control the precise numerical control t...
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The invention discloses a novel method for rapidly separating geometric errors of a rotating shaft of a multi-axis numerical control machine tool. By measuring vector direction change formed by a series of adjacent measuring points in the movement process of a rotary table, a mutual mapping relation between vector direction variations and the geometric errors of the rotating shaft is established, so that preparation separation of the six geometric errors of the rotating shaft is realized. According to the characteristic that the space vector direction change is only related to the angular displacement error of a machine tool shaft and is irrelevant to the linear displacement error in the movement process of the machine tool, a laser tracker is used for measuring the vector direction change formed by the measuring points in the movement process of the transversely-moving shaft of the machine tool by adopting multi-station time-sharing measurement; and the angular displacement error and the linear displacement error of the rotating shaft of the machine tool are sequentially separated. A mathematical model for measurement of the geometric errors of the rotating shaft of the multi-axis machine tool based on spatial vector direction deviation measurement is established, and a laser tracker base station position self-calibration algorithm, a measurement point determination algorithm and a single error separation algorithm of the rotating shaft of the machine tool based on precise numerical control rotary table measurement are derived in sequence.
Description
technical field [0001] The invention belongs to the technical field of laser precision measurement, and in particular relates to a new method for quickly separating geometric errors of rotation axes of a multi-axis numerical control machine tool. Background technique [0002] With the improvement of machining accuracy and workpiece complexity, the proportion of multi-axis CNC machine tools in the manufacturing industry is increasing. Multi-axis machine tools are based on traditional three-axis machine tools by adding rotating components to achieve efficient machining of complex parts. Accuracy is the main performance index of CNC machine tools. How to further improve the overall machining accuracy of multi-axis machine tools has become a research hotspot. In multi-axis machining, the geometric error of the rotary axis has a great influence on the overall machining accuracy. It is an effective way to improve the overall machining accuracy of multi-axis machine tools by meas...
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Login to View More IPC IPC(8): B23Q17/24B23Q17/22
CPCB23Q17/2428
Inventor 王金栋赖洋郭浩然唐雷雨谢宇鸿陈燚
Owner SOUTHWEST JIAOTONG UNIV