Controlling method of electric spark wire cutting machine and electric spark wire cutting machine

Abstract

The invention discloses a controlling method of an electric spark wire cutting machine and the machining parameters of the electric spark wire cutting machine are adjusted according to the image characteristics of spark discharge. Every time the machining scenes of electric spark wire cutting, such as the electrical parameters, the movement parameters, the materials and the like, are correspondingto the specific spark discharge forms, such as the spark count, the spark strength, the spark density and the like, so that it can be directly judged that the machining state is over feed, lack of feed or regular feed by the spark discharge forms which are the optical signals; compared with the conventional controlling production manner that the machining state is indirectly judged by the electrical signals, the manner of judging the machining state by the spark signals is directer, so that the cutting accuracy of the electric spark wire cutting machine can be further improved by using the controlling method; meanwhile, the prejudge of the short circuit can be realized by using the controlling method and the breakage of a wire electrode caused by the short circuit can be effectively reduced. Moreover, the invention further discloses the electric spark wire cutting machine and the effect is as above.

Description

technical field [0001] The invention relates to the field of image detection and machine vision, and in particular to a control method of a wire electric discharge machine and a wire electric discharge machine. Background technique [0002] With the development of science and technology, high-precision industrial products have more and more stringent requirements on the accuracy of parts. Wire-cut electric discharge machine stands out because it is not affected by macroscopic forces during application and can guarantee better machining accuracy and surface quality. Under normal circumstances, the advantages of processing most conductive metal materials are widely used in the field of industrial production. [0003] However, the current wire-cut electric discharge machines all adopt a negative feedback closed-loop control system based on electrical physical quantity detection, such as a wire-cut electric discharge machine based on a negative feedback control system based on v...

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Problems solved by technology

[0003] However, the current wire-cut electric discharge machines all adopt a negative feedback closed-loop control system based on electrical physical quantity detection, such as a wire-cut electric discharge machine based on a negative feedback control system based on voltage detection, which is easily affected by the working environment (temperature and humidity) and processing materials (Conductivity, impurities, etc.) interference, resulting in large changes in the measured electrical physical quantities, even exceeding the preset threshold, which not only increases the difficulty of determining the processing state based on the measured electrical physical quantities, but also may generate wrong feedback signals, which seriously affects The robustness of the whole system, even the electrode wire breaks, reducing the processing efficiency and cutting accuracy

Moreover, since the connection between the measured electrical physical quantity and the processing state is relatively distant, the accuracy of the mapping quantity between the measured electrical physical quantity and the processing state is also low, which further affects the cutting accuracy of the wire electric discharge machine.

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