Vision-based full-closed-loop system of numerically-controlled machine tool

Abstract

The invention provides a vision-based full-closed-loop system of a numerically-controlled machine tool. The vision-based full-closed-loop system includes a semi-closed-loop controlled workbench, a measuring unit, an analysis and calculation unit, a cutter holder for machining and a cutter. The measuring unit is in a flange shape and is mounted beside the cutter holder and on a knife handle. The analysis and calculation unit forms the full-closed-loop system together with the original semi-closed-loop controlled workbench. The analysis and calculation unit calculates the shape of the surface ofa workpiece according to the triangle rule in accordance with the position and shape of laser rays collected by a camera. A machining method for the vision-based full-closed-loop system of the numerically-controlled machine tool is also introduced. One-time machining is completed, and the method includes the steps of scanning of the workbench and a clamp and modeling, scanning of blank and modeling, machining and machining ending. According to the vision-based full-closed-loop system of a numerically-controlled machine tool and the machining method, the effect of machining motion after the cutter moves every time can be measured in real time, the shape in the machining process is reconstructed, the processed surface quality such as roughness is also incorporated into the full-closed-loopcontrol system, and the machining accuracy can be improved in multiples.

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...

AI Technical Summary

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

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