On-machine vision inspection method for engraving of chemical milling plastic film

Abstract

The invention discloses a chemical milling glue film engraving on-machine vision detection method, and relates to the field of vision detection. The method can adapt to a numerical control engraving process, and the chemical milling glue film engraving accuracy of a part to be detected can be rapidly and accurately detected. The method includes the steps: fixing a visual image acquisition system at the motion end of a numerical control machine tool; pre-planning a visual detection path by detection planning software; driving the visual image acquisition system to sequentially reach shooting directions on the pre-planned visual detection path by the motion end of the numerical control machine tool to shoot chemical milling glue film engraving images on the part to be detected; receiving, processing and calculating the images shot by the visual image acquisition system by on-machine detection software to obtain a glue film engraving detection result. The visual image acquisition system comprises a planar array image sensor, an imaging lens and a lighting source. The method has the remarkable advantages that accuracy and efficiency are high, a detection result can be traced, and a lotof glue film engraving templates can be saved, so that chemical milling production cost is greatly reduced and the like.

Description

technical field [0001] The invention relates to the fields of visual detection, image processing, and path planning, and in particular to an on-machine visual detection method for chemical milling film profiling. Background technique [0002] Most of the large thin-walled parts that are widely used in aircraft structures require thick plates to be processed into complex curved surfaces, and it is necessary to further mill out weight-reducing grooves or ribs on the surface of complex curved skin or wall panels. Such parts are often chemically milled. This process needs to first coat a layer of peelable protective film on the surface of the metal parts that can resist the action of corrosive solution, and then carve the shape along the edge of the area to be milled on the protective film, so as to determine the parts that need to be milled. parts. After engraving, the protective film coated on the part to be milled can be peeled off along the edge of the engraved shape, and ...

AI Technical Summary

Problems solved by technology

The traditional chemical milling process adopts the method of manual engraving, which has low efficiency and low precision

The aviation industry has gradually changed from the original manual film profiling to the use of five-axis laser CNC profiling machines for CNC profiling, but there is a lack of fast and accurate digital detection methods for film profiling that can adapt to CNC profiling.

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