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Numerical control machine processing online measurement method

A technology of numerical control machine tools and measurement methods, applied in metal processing equipment, measuring/indicating equipment, metal processing machinery parts, etc., can solve problems such as increasing the utilization efficiency of numerical control machine tools, and achieve improved processing detection efficiency, improved measurement efficiency, and calibration methods concise effect

Inactive Publication Date: 2011-07-20
BEIHANG UNIV
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Problems solved by technology

[0007] The technical solution of the present invention is to propose an online measurement method for CNC machine tool processing, which greatly increases the utilization efficiency of the CNC machine tool by combining with the machine tool, and solves the problem of large-scale splicing

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  • Numerical control machine processing online measurement method

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Embodiment Construction

[0031] In order to better understand the present invention, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] Refer to attached figure 1 , an online measurement method for CNC machine tool processing, comprising the following steps:

[0033] Before combining the measurement system with the CNC machine tool, make necessary preparations for the measurement system. The measurement system refers to a binocular stereo vision sensor, including two cameras and a projector; the necessary preparations include calibrating the internal and external parameters of the two cameras , debug and prepare the host computer measurement software, etc.;

[0034] 1. The installation of the measurement system, remove the spindle tool of the CNC machine tool, install the measurement system on the spindle, connect the data line, and combine it with the CNC machine tool.

[0035] 2. Translation cal...

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Abstract

The invention discloses a numerical control machine processing online measurement method. The method can realize online measurement of large workpieces. A binocular stereo vision measurement system is combined with a numerical control machine to complete integral measurement of the large workpieces under the traction of the numerical control machine. The method comprises the following steps of: calibrating internal and external parameters of a camera, and combining the measurement system and the numerical control machine; performing translation calibration and rotary calibration to calibrate direction vectors of X-axis and Y-axis of the numerical control machine and rotary matrix R and translation vector T after the measurement system rotates; dragging the measurement system to move by the numerical control machine to perform single view field scanning till traversing all surfaces of a measured workpiece; and finally, performing integral joint according to all view field point cloud data and the reading of a main shaft of the numerical control machine so as to complete integral measurement of the workpiece. The method has the characteristics of flexible use, convenience, high precision and the like, and can be used for online measurement of the large workpieces on an industrial site.

Description

technical field [0001] The invention relates to a method for on-line measurement of CNC machine tool processing, which can be used for non-contact on-site measurement of industrial processed products at industrial sites. The invention belongs to the field of machine vision. Background technique [0002] Large workpieces, especially integral parts, are increasingly used in many occasions due to their relatively light weight and high strength. However, due to their large dimensions and many features to be measured, it is difficult to measure them in practice. . If contact measurement is used, not only can high-density data point clouds not be obtained, but also the measurement efficiency is low, and it is difficult to measure the entire workpiece due to its large size. With the development of science and technology, non-contact measurement, especially the measurement method based on vision technology, has been widely used because of its simple structure, low price and high m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q17/20B23Q17/24
Inventor 赵慧洁姜宏志吴尽龙李旭东
Owner BEIHANG UNIV
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