SU806340A1 - Multielectrode tool for elecric spark alloying - Google Patents

Description

one

The invention relates to electrophysical and electrochemical methods of processing and can be used for mechanized electrofusion doping, strengthening and restoring the size of Plr, cylindrical and conical outer surfaces.

A multi-electrode tool for electric-spark alloying is known, made in the form of a rotatable body, on which spring-loaded electrode holders with electrodes LlJ are rotatably mounted on the axes.

However, a tool with spring-loaded electrodes has a number of disadvantages, due to the fact that touching the electrode with the surface being treated has the nature of a hard impact due to the inertia of the impacted parts of the tool and preloading the springs connected to the electrodes.

In addition, the rotation of these tools is possible only in one direction, which complicates the choice of processing modes and reduces their technological capabilities, as it has been proven by research and practice.

that the direction of rotation of the tool relative to the direction of feed of the part has a great influence on the parameters of the resulting coating (layer thickness, continuity, roughness, etc.}

The aim of the invention is to expand the technological capabilities of the electrospark doping process and improve the quality of processing.

The goal is achieved by the fact that the tool body is made in the form of a disk, on the end of which are cantilever flat springs radially arranged, pairwise forming angles, each of which has an axis of an electrode holder made in the form of a truncated wedge with a smaller base to the top of the divergence angle of the springs the angle at the top of the wedge is less than the spring angle of the springs.

FIG. 1 shows a multi-electrode tool for electrospark doping, a general view; in fig. 2 a section along aa in FIG. 1.,

The multielectrode tool consists of a body 1 made in the form of a disk, in the center of which is mounted a sleeve 2 with an internal tapered bore. In the collar of the sleeve, radial grooves are made into which the flat springs 3 are mounted in a rollerblade manner, pairwise obrazukadiye angle fixed by the lid 4.

In each of the corners od along the periphery of the housing 1, holes are made in which the axles 5 are fixed.

On axis x 5, they are installed with the possibility of rotation to one side in a plane parallel to the housing, electrode holders with electrodes 7, made in the form of a truncated wedge.

Each electrode holder 6 is located with a gap between two radially emitting flat springs Havoi 3, the divergence angle o (i, which is greater than the angle at the top of the electrode holder b wb, while the wedge faces the smaller base to the top of the angle L

The springs 3 are intended to return the electrode holders with the electrodes after their contact with the treated surface of the part 8 to the original position.

The current lead to X1 each electrode holder 6 is individual and is carried out using flexible wires 9 through the drive shaft 10, the sleeve 2 and the housing 1.

The tool works as follows.

When the tool is rotated, the part 8 is turned on and the technological current is applied, the electrode 7 comes into contact with the workpiece 8.

Since at the initial moment there is some gap between the springs and the electrode holder b, the contact of the electrode with the part 8 has the character of a soft blow.

Upon further rotation, the electrode holder 6, turning around its axis 5, comes into contact with the springs 3, which, pressing the electrode 7 to the part 8, define the required processing mode.

Along the path of the electrode along the surface of the part, it makes forced oscillations (vibrations), similar to the vibrations of the electrode 6 of electromagnetic vibrators. At the same time, due to the electric-spark discharge, the electrode material is transferred to the part.

When leaving the working area the electrode is under the action of a spring, quickly

returns to its original position.

At the same time, the harmful parasitic oscillations of the electrode around the axis 5 quickly die out due to the impact of the electrode holder on the flat spring, as a result of which the kinetic energy of the electrode holder dissipates. At an exit from contact of the first electrode the subsequent electrode at the same time comes into operation. In the future, the process is repeated continuously.

The required mode of operation and quality of processing is determined by the distance between the surface to be treated and

5 by the axis of rotation of the tool, the direction and magnitude of the feed of the part, the direction and magnitude of the speed of rotation of the tool.

The proposed design of a multi0 electrode tool is simple, technologically advanced, reliable in operation, it reverses its rotation and the soft contact of the electrode with the treated surface improves the quality

. coatings and greatly expands the technological capabilities of mechanized electrospark doping.

Claims (1)

Invention Formula Multi-electrode tool for electric-spark lining, made in the form of a rotatable housing, on which spring-loaded electrode holders with electrodes are rotatably mounted on the axes, in order to expand the technological capabilities of the process electrospark alloying and improving the quality of processing, the body is made in the form of a disk, on the end of which there are radially arranged cantilever flat springs, which in pairs form angles, each of which has an axis of the electrode holder fixed in the form of a truncated wedge, facing a smaller base to the top of the angle of divergence of the springs, moreover, the angle at the tip of the wedge is less than the angle of divergence of the springs. Sources of information taken into account in the examination 5 1. USSR author's certificate 484964, cl. B 23 P 1/18, 1973. Y //////// 7 // FIG. I