A method for calibrating the probe length of a revo measuring head

A calibration method and probe technology, which is applied in the field of REVO probe probe length calibration, can solve problems such as the impact of calibration accuracy, achieve high-precision calibration, and eliminate calibration errors.

Active Publication Date: 2020-10-13
TAIYUAN UNIV OF TECH
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Problems solved by technology

In the existing calibration methods, the calibration of the probe length needs to move the three main motion axes of the measuring machine, and the motion errors generated by the movement of the three main motion axes will be included in the probe even if the motion errors of the main motion axes are compensated. The calibration result of the needle length will affect its calibration accuracy

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  • A method for calibrating the probe length of a revo measuring head

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] like figure 1 As shown, a method for calibrating the length of a REVO measuring head probe according to the present invention is used in a REVO five-axis measuring system under a non-orthogonal coordinate measuring machine. Granite slab, the specification is 1000×1000×150mm, the flatness of the working surface is 2.5μm; the ring gauge 2 is a special ring gauge for proofreading and smoothing, the tolerance is ±0.002mm, and the diameter range is 200mm-300mm; the specific steps are as follows:

[0026] S1. Fix the ring gauge 2 on the flat plate 1 placed horizontally, ensure that the ring gauge 2 does not move under the action of external force, make the A axis of the REVO probe at 0°, and move the main shaft of the measuring machine so that the center of the measuring ball 3 is in line with the The central axis of the ring gauge 2 coincides, and the main...

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Abstract

The invention relates to a method for calibrating the probe length of a REVO measuring head, and belongs to the field of precision testing technology and instruments. The method comprises the following steps that a ring gauge is fixed on a horizontally placed flat plate; the main axes of a measuring machine are moved so that the A axis of the measuring head is located in the zero position state, and the measuring ball center of the measuring head coincides with the central axis of the ring gauge; and the three main axes of the measuring machine are kept stationary, the measuring head A axis and the measuring head B axis are moved, two symmetrical points on the same section of the ring gauge are detected, data are returned according to the two detected points, and the probe length of the REVO measuring head is calibrated through projection calculation. According to the method, calibration is carried out in a state that the three main axes of the measuring machine are stationary, so thatprobe length calibration errors caused by movement errors of the three main axes of the measuring machine and probe length calibration errors caused by misalignment between the axis of the B axis ofthe REVO measuring head and the axis of the ring gauge can be avoided, high-precision calibration of the probe length of the REVO measuring head can be realized, and the method can be applied to measurement.

Description

technical field [0001] The invention relates to a method for calibrating the length of a probe of a REVO measuring head, which belongs to the field of precision testing technology and instruments. Background technique [0002] REVO measurement system is a five-axis coordinate measurement system designed and used based on an orthogonal three-coordinate measuring machine launched by Renishaw Company in the United Kingdom. The UCCServer program that comes with the measurement system can quickly and automatically calibrate the probe length and other parameters of the REVO probe in the environment of an orthogonal three-coordinate measuring machine with a stroke of no less than 500mm×500mm×250mm. The calibrated probe length Such parameter values ​​are directly stored in the computer, compensated in real time during the actual measurement process, and the compensated coordinate values ​​are fed back to the user; however, in the non-orthogonal coordinate measurement environment, th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/04
CPCG01B21/042
Inventor 张海涛杨惠欣王璇乔铁柱杨毅
Owner TAIYUAN UNIV OF TECH
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