SU469571A1 - Electrochemical dimensional processing method - Google Patents

Description

one

This invention relates to the electrochemical treatment of metals.

There is a method of dimensional electrochemical machining with a periodic supply of the electrode tool until it touches the part and the subsequent tap to a given interelectrode gap.

The disadvantage of this method is that at the moment of contact of the electrodes (during osh, falling) due to residual palladium an oxide film is formed on the surface of the anode, which inhibits the process of anodic dissolution.

The proposed method differs from that in that during the period of the supply and removal of the electrode-tool, dry, heated to 35-40 ° C, gas under pressure of 8-12 atm is fed into the interelectrode gap.

This eliminates the possibility of momeite feeling on the part surface an additional layer of oxide film.

A diagram illustrating the proposed method is shown in the drawing.

It includes an electrolyte tank 1, an electrolyte supply pump 2 with a valve 3, the opening and closing of which is driven by a drive 4.

The air valve 5 is connected to a pulse current source.

The circuit also contains a safety valve 6, a drive 7, a tank 8 for heated gas.

The processing method is as follows.

The electrolyte 113 of the tank 1 is supplied to the treatment zone by the pump 2 through the valve 3.

At the time of the end of the working feed, the power source is turned off and the signal for closing the valve 3 is detected. Electrolyte through valve 6, which is set to a predetermined pressure, is discharged into tank 1. At the same time, a signal is sent to the actuator 7, through which valve 5 and valve 6 are opened during the supply of the tool-electrode before contact with the anode-part and discharge to the gap of the pressure node, a heated basin from the reservoir 8 is inserted. Electrochemical recovery products are removed from the working gap at the moment of electrolyte removal.

As a result, the contact of the electrodes does not result in the formation of an oxide film on the surface of the aiodine.

Subject invention

The method of electrochemical dimensional processing with periodic iodine of the electrode tool until it touches the part and subsequent tap to the specified interelectrode gap, characterized in that, in order to eliminate the possibility of forming an additional layer of oxide film on the surface of the part, instrument in the interelectrode gap serves dry, heated to 35-40 ° C, gas under pressure of 8-12 atm.