Multifunctional monitoring method for self-adaptive adjustment of wire cut electrical discharge machining process

Abstract

The invention discloses a multifunctional monitoring method for self-adaptive adjustment of a wire cut electrical discharge machining process, comprising the following steps: establishing a multifunctional monitoring device, starting electrical discharge machining, and respectively obtaining videos of a reference surface discharge condition and an electrode wire motion state through a special high-speed camera shooting observation system; performing OpenCV image processing on the videos of the discharge condition, carrying out statistical analysis on spark center points through a centroid method to obtain a discharge point distribution statistical graph; carrying out electrode wire position point analysis on the videos of the electrode wire motion state to obtain the electrode wire motionstate; obtaining discharge waveforms through a voltage high-speed acquisition card system, and classifying the discharge waveforms through an image moment, fractal dimension, a wavelet transformationmethod and a support vector machine classification method to obtain the percentage of each type of discharge waveforms. The method is diversified in function, high in detection precision and visual inmonitoring, can be used for guiding and selecting the optimal machining method and machining parameters, and provides a basis for self-adaptive adjustment of wire cut electrical discharge machining.

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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