A multifunctional monitoring method for self-adaptive adjustment of wire electric discharge machining process

Abstract

The invention discloses a multifunctional monitoring method for self-adaptive adjustment of the wire electric discharge machining process, which comprises the following steps: building a multifunctional monitoring device, and after starting the electrical discharge machining, obtaining the discharge conditions of the reference surface and The video recording of the wire electrode movement state; after performing OpenCV image processing on the video recording of the discharge situation, the statistical analysis of the spark center point is performed by the centroid method to obtain a statistical map of the discharge point distribution; the wire electrode position point analysis is performed on the video recording of the electrode wire motion state, Obtain the movement state of the electrode wire; obtain the discharge waveform through the voltage high-speed acquisition card system, classify the discharge waveform through the image moment, fractal dimension, wavelet transform method and support vector machine classification method, and obtain the percentage of various discharge waveforms. The invention has diversified functions, high detection accuracy and intuitive monitoring, can be used to guide the selection of the best processing method and processing parameters, and provides a basis for self-adaptive adjustment of electric discharge wire cutting.

Description

technical field [0001] The invention belongs to the technical field of electric discharge wire cutting, and in particular relates to a multifunctional monitoring method for self-adaptive adjustment of the electric discharge wire cutting process. Background technique [0002] With the rapid development of high-end manufacturing fields such as aerospace, medical equipment, and mold manufacturing, the demand for special difficult-to-process materials is also increasing. Wire-cut electric discharge technology is the key technology for secondary processing of difficult-to-process materials, but because the process of spark discharge is still not clear enough during processing, the existing wire-cut electric discharge machine tools cannot adaptively adjust the processing technology, and it is difficult to Meet the needs of modern intelligent manufacturing. Appropriate processing parameters are the key to ensure the efficiency of WEDM and the surface quality of the workpiece, and ...

AI Technical Summary

Problems solved by technology

This method has certain operability, but ignores the strong glare in the actual processing process, which will inevitably interfere with the captured image, so it will be difficult to realize in practical applications

[0007] To sum up, the above-mentioned methods all have certain limitations, and basically can only measure one parameter in the process of wire electric discharge cutting, so it is necessary to develop a method that can monitor the discharge point, discharge state and electrode at the same time. The method of these three signals of the wire motion state provides a research basis for obtaining a more uniform distribution of discharge points, obtaining a high proportion of normal spark discharge, and reducing the range of processing parameters in the abnormal motion state of the electrode wire, thereby improving processing efficiency and surface quality of the workpiece

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