Numerical control machine tool visual positioning system and method

Abstract

The invention provides a numerical control machine tool visual positioning system and method, and the system comprises a camera connection module which is used for setting an IP address and a port number of a camera, and carrying out the connection with the camera through an industrial control computer according to the IP address and the port number; the camera calibration module is used for calibrating a camera, acquiring internal parameters and external parameters of the camera and then performing distortion correction; the template matching module is used for positioning the workpiece to be machined in a template matching mode; and the processing module is used for controlling a camera to photograph through the PLC, acquiring position information of the to-be-processed workpiece according to a photographed image, and then controlling a machine tool to process the to-be-processed workpiece through the PLC. According to the method, camera calibration is adopted, image points caused by non-ideal characteristics of a lens shape are distorted in the radial direction, a camera calibration file is used for carrying out distortion correction on a picture, and therefore conversion between a pixel coordinate system and a machine tool coordinate system is achieved.

Description

technical field [0001] The invention relates to the technical field of visual positioning of numerical control machine tools, in particular to a visual positioning system and method for numerical control machine tools. Background technique [0002] CNC machine tool is an automatic machine tool equipped with a program control system. After the numerical control device is processed, various control signals are sent by the numerical control device to control the movement of the machine tool, and the parts are automatically processed according to the shape and size required by the drawing. . During the above-mentioned processing, the machine tool needs to locate the position of the part to be processed, and then move the head of the machine tool to the positioned position, so as to process the part to be processed accurately. [0003] Patent document CN107160241A (application number: CN201710446392.8) discloses a visual positioning system and method based on CNC machine tools. ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the positioning method of machine tool parts to be processed is mainly mechanical positioning. By setting up mechanical components such as guide rails, the movement trajectory of the machine head is guided and limited, so that the machine head is guided to move to the position of the parts to be processed, and the Processing, the existing technology has the following defects: positioning is performed by mechanical parts, the positioning accuracy depends on the accuracy of the mechanical parts, and the debugging process is relatively cumbersome. At the same time, with the wear and aging of the mechanical parts, the positioning accuracy will be further affected

Images