SU496148A1 - Electrode tool - Google Patents

Description

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The invention relates to electrochemical dimensional processing and can be applied to mechanical engineering enterprises in the manufacture of parts such as pipes, hollow shafts, when a high purity grade of the treated surface is required.

Cathode processing devices are known for the enny surfaces of pipes containing working and lead-in parts, dielectric guides and lead-in parts. However, such devices cannot provide electrochemical dimensional processing of large diameter fubs (F-80250 and more) using rotation due to increased wear of the dielectric guides and the occurrence of short circuits.

The purpose of the proposed device is to reduce the wear of the dielectric guides.

For this purpose, the lead-in portion of the dielectric guides is made in the form of a rotating axle box from an anti-friction material.

The drawing shows the proposed AlecTrod-tool, a general view.

The electrode tool consists of a housing 1 with a trunnion 2 and a landing cone 3, dielectric guides including a lead-in part — a bush 4 mounted on the trunnion 2 rotatably relative to the housing 1, rollers 5 located on axis x 6 around the circumference of the housing and insert 7 of dielectric material. The guides protrude above the working surface by the smallest interelectrode gap, ensuring the normal course of the ECM process. The bolt 8 serves to fasten the cathode on the conductive rod.

The electrode tool works as follows.

A cathode fixed on the machine’s punch is introduced into the workpiece area, electrolyte is supplied, the part rotation mechanism and process current source are turned on, and an ECM process is performed by moving the tool along the product. At the same time, the weight of the cathode and the force from the sagging rod are perceived box 4 because it is based on the smaller hole. The direction of the flow is shown by the arrow). The rollers 5 are always in the hole of a larger diameter, since the anodic dissolution process is underway. Conventionally, the boundary of the anode A is shown in lines.

The input part of the dielectric guides may be at either end of the cathode, depending on the direction of supply, the possibility of installing two boxes at the ends of the cathode is not impaired when, under production conditions, the processing can be carried out with 1 different tool feeding directions.

Since, when the part (anode A) rotates, the lead-in bush 4 rotates with it relative to pin 2, the wear of the insulators in contact with the surface to be treated decreases sharply, which ensures the normal course of the ECM process. Centering Worker4

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The cathode cathode occurs in the trunnion 2, which is made with high surface purity and operates at lower peripheral speeds, which also contributes to its slight wear.

The magnitude of the removed allowance at the ECHO offered by the electrode tool depends on the selected current. loads and feed rates.

Item of

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Electrode-tool for electrochemical treatment of the inner surface of hollow shafts and tubes, containing working and lead-in parts, dielectric, characterized in that, in order to reduce the wear of dielectric guides, the lead-in part of the latter is made in the form of a rotating axle box of antifriction material.