SU956217A1 - Apparatus for electric discharge cleaning of abrasive wheels - Google Patents

Description

(5) DEVICE FOR ELECTROEROSION CLEANING

ABRASIVE CIRCLES

one

This invention relates to electrophysicochemical processing methods.

The known method of electrochemical-mechanical cleaning of diamond and abrasive wheels on a metal bond and a device for its implementation. The device consists of a current source and connected to it isolated from each other, mounted on the holder of the electrodes, placed along the arc of a circle tl.

The drawback of the device is the intensive wear of the wheel and electrodes, since during the operation of the device there is a continuous electrochemical dissolution and mechanical destruction of both the wheel and electrode, despite the use of alternating current. In this connection, a greater amount of electricity is expended on cleaning the circle. In addition, the known device cannot be used for cleaning circles on a non-conducting link.

The aim of the invention is to reduce wear of the wheel and electrodes, reduce power consumption and the ability to clean the wheels on a non-conductive link.

This is achieved by the fact that each of the electrodes is made as a set of elements isolated from each other, the spacing between which is equal to or less than two thicknesses of elements, with the elements of one electrode arranged in a checkerboard pattern with respect to the elements of the other electrode.

FIG. 1 shows a device, FIG. 2 shows section A-A in FIG. one; on

15 of FIG. 3 shows the arrangement of elements in the electrodes.

Claims (1)

The proposed device consists of insulated from each other electrodes 1 and 2, representing a set of isolated elements placed on the axis x 3 and (see Fig. 1 and Fig. 2). Electrodes 1 and 2 are freely suspended by the holder S and axis 6 on the double-arm lever 7 pivotally mounted in the bracket 8 of the grinding machine 9. The free end of the double-arm lever 7 is provided with a thread and a counterweight 10, which regulates the pressing force of the electrodes 1 and 2 to the surface of the grinding wheel. A current lead from the current source to the electrodes 1 and 2 is carried out through two current-carrying devices 11 and 12, the negative potential is supplied through brushes 13, bushes 14 to elements 15, which are fixed on axis x 3 and t, and the positive potential is brought through brushes 16, sleeve 17, axes 18 to elements 19. On sleeve 17, axles 18 are fixed, on which elements 19 are in turn secured. Flutes are made of fluoroplastic sleeves 20, 21 and 22, which ensure free rotation of axes 3 and 4 and sleeves 17 with axes 18. Elements 15 and 19 are isolated from each other. uga bushings 23 and the electrodes 1 and 2 are insulated sleeve 24. The elements 15 and 19 of the electrode 2 are shifted with respect to the same electrode elements 1 so that the elements of the second electrode overlap the gaps between the elements per Vågå (see. FIG. 3). The pitch between the elements must be equal to or less than two thicknesses of the elements. Cleaning the grinding wheel 25 by grinding the part 26 is carried out by applying both constant and alternating current to the electrodes 1 and 2. The device works as follows. In the initial position, the device for its cleaning is lowered to the periphery of the grinding wheel 25. Starting the grinding of the part 26, a power source is connected and the clamping force of the electrodes 1 and 2 is gradually increased to the periphery of the rotating circle, which ensures the rolling motion of the latter in a circle. When the circle is filled with chips, the last, falling into the gaps between elements 15 and 19, closes them and burns. If the chips fall on one of the elements in the first electrode, then upon further rotation of the circle it will appear in the gap of elements of the second row, which will also cause the elements to close and burn the chips. At the end of grinding or when changing the wheel, the cleaning device is removed from the contact with the wheel using the counterweight 10, and the current source is disconnected from the electrodes. Thus, the application of the proposed device will provide high-quality cleaning of the circle due to the complete combustion of chips. The device can operate from both constant and alternating current. In addition, the use of the proposed device will allow the cleaning of circles on a ceramic or organic bond when grinding viscous materials. The inclusion of elements only at the time of closure of their chips will ensure the durability of the device and will reduce the consumption of energy required for cleaning the circle. The invention of the device for electro-erosion cleaning of abrasive wheels, in which electrodes insulated from each other, connected to a power source, are fixed in a holder and placed along an arc of a circle corresponding to the surface of the circle being cleaned, characterized in that in order to reduce wear of the wheel and electrodes and the ability to clean the circles on the non-conducting link, each electrode is made as a set of insulated from each other and alternately connected to different poles of the power supply element comrade, which is equal to the pitch between element thickness, wherein the electrode elements are offset relative to one another electrode elements on step size. Sources of information taken into account during the examination 1. USSR Author's Certificate tf, cl, H 23 P 1/10, 1968 (prototype). x Q l ig.5