RU1802763C - Method of electrochemical machining - Google Patents

Description

WORKS

 The invention relates to electrical processing and can be used in electrochemical and electroerosion chemical processing methods where electro / s are used.

; The purpose of the invention is to increase the accuracy and productivity of the process by improving the evacuation of the processed products.

 In FIG. 1-3 are diagrams of an apparatus for implementing methods in which the surface to be treated is one of the electrodes; in FIG. 4 is a diagram of a processing device where the surface to be treated is not an electrode.

The device contains electrodes of different polarity 1.2, installed with a gap of 3, electrodes placed a gasket with goals 4, 5 - the surface to be treated.

The method is carried out as follows.

, An insert with slots 4 is placed between the electrodes 1 and 2. The space between the electrodes 1 and 2 is filled with electrolytes. The voltage is applied to the electrodes. Electric processing can be carried out both with the supply of the electrode-tool, and with the tool stationary. This is determined by the technological task. The magnitude of the voltage depends on the distance between the electrodes, the thickness of the gasket, the size of the slots, the conductivity of the electrolyte, and other factors, and the basis is selected on the condition that the process of intense vapor-gas formation in the electrolyte filling the gaps is ensured. In practice, the voltage value can be easily determined during tuning by the characteristic steady sound that accompanies the process in the slots of the gasket. The circulation of the electrolyte in the gap is ensured by periodically changing the volume of the working medium in the slots of the gasket due to its phase transformations. When the electrolyte boils, the vapor phase formed partially displaces the liquid phase. As a result, the electrical conductivity of the working medium in the slots of the gasket decreases and the electric current decreases. The vaporization process is inhibited, the liquid again enters the slot and everything repeats. In this way, a dynamic process of periodically changing the electrolyte in the slots of the gasket is established, which has a mixing effect on nearby areas on both sides of the gasket.

The electrolyte circulation rate in the gap of the gasket affects the minimum

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phase voltage, which must be applied to the electrodes, so that in the working medium filling the slots of the gasket, the phase transformation process begins.

The copper billet was flashed with an electrolyte sublayer of 15% Na NOs according to the scheme of FIG. 1. In this case, 1 is the cathode, 2 is the anode. A tool electrode made of copper in the form of a rod with a diameter of 2 mm was placed in a polystyrene tube with a diameter of 8 mm. In the blind end of the polystyrene tube, a large number of through holes with a diameter of 0.5 mm / Rsch / P0 0.8 / were made. The end face of this tube served as a gasket, in the slots of which a process was initiated to ensure the circulation of the electrolyte.

The supply of the electrode tool was carried out manually. The process was steady. During the 4 min treatment, an electrode-tool with a gasket was introduced into the workpiece to a depth of 2 mm. On the workpiece, a cross-sectional representation of the polystyrene tube was displayed, while the presence of gaps in the gasket on the surface to be treated was not reflected.

The proposed method replaces a multi-electrode instrument during ECHO.

Claims (1)

The formula is invented and an electrochemical treatment method in which a gasket with slots is placed between the electrodes, characterized in that, in order to increase the accuracy and productivity of the process by creating an evacuation condition of the electrolyte in the interelectrode gap, a voltage is applied to the electrodes, corresponding to the occurrence of vapor and gas formation in the slots of the gasket.