Machine tool plane contour error monocular measuring method

Abstract

The invention discloses a machine tool plane contour error monocular measuring method, belongs to the field of computer vision measurement and relates to the contour error measuring method suitable for an ideal motion trail and an actual motion trail of a machine tool plane. The measuring method comprises the steps that a monocular camera and a numerical control machine tool are integrated; a measuring basis with matrix arrangement code mark points is designed at first, and the position relation between every two code mark points is made to be precise and known; the measuring basis and the monocular camera are fixed to the machine tool during measuring, and motion images of the measuring basis are gathered through the monocular camera; and during image processing, the multiple code mark points which are in each frame of the images and close to the centers of the images are identified and positioned, and the motion trail of the machine tool is calculated according to the known position relation between every two code mark points. According to the machine tool plane contour error monocular measuring method, the problems that the plane motion trail range needing to be measured is large and any tails are difficult to measure due to the fact that the stroke of the machine tool is large are solved, and the high-speed motion plane contour error of the machine tool is measured in a wide range and high precision mode, and the measurement precision is effectively improved.

Description

technical field [0001] The invention belongs to the field of computer vision measurement, and relates to a method for measuring the contour error applicable to the plane ideal motion track and the actual motion track of a machine tool. Background technique [0002] In the development of major national equipment projects such as aviation, aerospace, energy power, and shipbuilding, parts with complex and variable curvature surface contours, such as planar microstrip antennas for automobiles and satellites to receive electromagnetic waves, are widely used. The shape of the part and the accuracy of the geometric outline directly affect the working performance of the equipment. CNC machine tools provide effective means for high-quality and efficient machining of complex variable curvature parts, but the dynamic contour error caused by the lag of the servo system in high-feed cutting greatly reduces the performance of the machine tool. Therefore, it is particularly important to a...

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Problems solved by technology

Shenzhen Han's Laser Co., Ltd. Yang Chaohui and others invented the patent number CN201210569818 "Dynamic Error Measurement System for High-speed Machine Tools". Invented by reading large or small parts of machine tools moving at high speed in high-speed image recording equipment located on the lithographic glass line plate The scale position of the high-speed motion machine tool can directly solve the error of large and small parts. This measurement system only measures the error in the up and down direction during the high-speed rotation of the drill bit, and the measurement field of view is limited by the size of the lithographic glass line plate

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