A reciprocating wire electric discharge machine tool discharge position acquisition system

Abstract

The invention discloses a reciprocating WEDM (wire cut electrical discharge machining) machine tool discharge position acquisition system. The system comprises a hardware system and a LABVIEW software development platform. The hardware system comprises a machine tool pulse power supply, a pulse processing power supply circuit, an oscilloscope, an external power supply, a branch 1 current sensor, a branch 2 current sensor, a signal conditioning circuit, a data collection card and a PC. The branch 1 current sensor and the branch 2 current sensor are connected in series with the signal conditioning circuit and the oscilloscope; the branch 1 current sensor and the branch 2 current sensor are used for collecting current of two branches; the current signals are processed by the signal conditioning circuit, and then, are connected with the data collection card; the PC and the data collection card are connected through a PCI interface; and the PC is embedded by the LABVIEW software development platform for software programming, thereby realizing external hardware driving, electrical signal numerical reduction and filtering, meanwhile, displaying current and discharge position collected by the data collection card and the oscilloscope, and ensuring system accuracy and reliability.

Description

technical field [0001] The invention relates to a collection system, in particular to a discharge position collection system of a reciprocating wire electric discharge machine tool. Background technique [0002] Wire-cut electric discharge machining technology can theoretically process conductive metal materials with any hardness. It is an indispensable processing method for processing difficult-to-machine materials. Compared with traditional processing methods, it has absolute advantages in processing high-hardness and difficult-to-machine materials. The characteristics of cheap machine tools and low operating costs meet the needs of the market. In recent years, wire electric discharge machining has been widely used in actual production, especially in aerospace, aviation, automobile, electronics, national defense and civil industrial sectors. With the gradual improvement of large-taper cutting technology and the breakthrough of large-thickness cutting technology, reciproca...

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Problems solved by technology

[0003] Wire-cut electric discharge machining is to use the electro-corrosion process of pulse discharge to etch away the metal processing allowance, and then realize the size processing. characteristics, but the concentration of the discharge position may lead to arc discharge, reduce the surface accuracy of the workpiece, and may even cause the workpiece to be scrapped. In order to ensure stable and efficient processing, it is necessary to accurately detect the discharge position of wire cutting. In order to further study the discharge position Distribution provides a strong basis for processing stability and workpiece surface quality

In the process of WEDM, it is difficult to directly observe the position of the discharge point because of the complex erosion process of the workpiece, the high and uncertain discharge frequency, the influence of electrical parameters and non-electrical parameters, etc. The accuracy of position detection is also difficult to guarantee

At present, there are few studies on the detection of discharge position in wire cutting, and the existing detection system of discharge position in wire cutting can hardly meet the needs of experimental research in terms of the stability and accuracy of the calibration wire discharge position

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