Numerical control machine tool full closed-loop system based on vision

A CNC machine tool, full-closed-loop technology, applied in the direction of automatic control devices, metal processing machinery parts, measuring/indicating equipment, etc., can solve the problems of not controlling the cutting results of cutting tools and not bringing the cutting process into control, so as to improve the processing quality and improve The effect of processing precision and high degree of automation

Inactive Publication Date: 2018-04-20
INST OF LASER & OPTOELECTRONICS INTELLIGENT MFG WENZHOU UNIV
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Problems solved by technology

[0003]The CNC machine tool cuts the material on the blank to match the design goal, but no matter whether it is a semi-closed loop or a closed loop, it does not control the cutting result of the tool on the blank. The cutting process is not included in the closed loop of control

Method used

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  • Numerical control machine tool full closed-loop system based on vision
  • Numerical control machine tool full closed-loop system based on vision
  • Numerical control machine tool full closed-loop system based on vision

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Embodiment Construction

[0062] For CNC milling machine, the present invention is implemented as follows:

[0063] Such as Figure 1-5 As shown, a vision-based full-closed-loop system for CNC machine tools, the basic idea is to measure the three-dimensional shape of parts in real-time during the machining process to improve the machining accuracy, specifically including the semi-closed-loop controlled workbench and the full-closed-loop measurement unit , Analytical calculation unit, toolholders and tools for processing.

[0064] The measurement unit 4 is as attached figure 2 , in the shape of a flange, installed on the side of the tool holder 1 and on the tool handle with rolling bearings, does not rotate with the tool 2, but moves with the tool 2, and the measuring unit 4 is equipped with several pairs of laser emitters 3 and detection heads at equal radial intervals 5. The detection head 5 is located on the outer large ring, and the laser emitter 3 is located on the inner small ring. In order to ...

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Abstract

The invention provides a vision-based fully closed-loop system for CNC machine tools, including a semi-closed-loop controlled workbench, a measurement unit, an analysis and calculation unit, toolholders and tools for processing; the measurement unit is in the shape of a flange and is installed on the Next to the tool holder and on the tool handle, the analysis and calculation unit together with the original semi-closed-loop control workbench constitute a full-closed-loop system. The analysis and calculation unit calculates the shape of the workpiece surface according to the triangle rule according to the position and shape of the laser line collected by the detector head; it also introduces a processing method based on the vision-based CNC machine tool full-closed-loop system, and completes a processing including scanning the workbench, Fixture and modeling, scanning and modeling of faults, processing, and processing end four steps. The invention can measure the effect of the machining action after each movement of the tool in real time, reconstruct the shape during the machining process, and incorporate the machined surface quality such as roughness into the fully closed-loop control system, which can double the machining accuracy.

Description

technical field [0001] The invention relates to the technical field of numerical control machine tool control, and more specifically, relates to a vision-based fully closed-loop system of a numerical control machine tool. Background technique [0002] CNC machine tools are divided into three control modes: open loop, semi-closed loop and closed loop. Open-loop CNC machine tools have no feedback and low precision; semi-closed-loop CNC machine tools use pulse encoders on the motor as feedback components, which can control the speed of the motor with high precision; closed-loop CNC machine tools use grating rulers as position feedback components, with the highest accuracy. [0003] The CNC machine tool cuts the material on the blank with a tool to match the design goal, but whether it is a semi-closed loop or a closed loop, it does not control the cutting result of the tool on the blank, and the cutting process is not included in the closed loop of control. If the cutting proc...

Claims

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Application Information

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IPC IPC(8): B23Q15/02B23Q17/20B23Q17/24
CPCB23Q15/02B23Q17/20B23Q17/2419
Inventor 罗胜徐玲杰
Owner INST OF LASER & OPTOELECTRONICS INTELLIGENT MFG WENZHOU UNIV
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