RU2022714C1 - Apparatus to produce powders of current-conducting materials - Google Patents

Abstract

FIELD: electronic industry. SUBSTANCE: apparatus has drum 1 with band, rollers system 2 to give band trough-shaped form. Bunker with measuring device 3, filled with bits of dispersing material, are located along band moving path and over band surface. Further along direction of band movement a system of rollers is placed. The system is used for reduction of band with bits of dispersing material. Nozzle 5 to feed working fluid to zone of treatment is located before electrode-tool 6 and directs spray of working fluid in clearance between electrode-tool and bits of dispersing material. Apparatus has power source 7. Tank with working fluid and pump are located in any place not far from zone of treatment. EFFECT: decrease of power consumption in process of dispersion. 3 cl, 3 dwg

Description

 The invention relates to electrical discharge machining and can be used in ferrous and non-ferrous metallurgy and in the production of powders of metals and alloys, oxides and carbides.

 The aim of the invention is to reduce the energy intensity of the process, providing the possibility of obtaining powders from pieces of dispersible material having different shapes and dimensions, simplifying the design of the installation.

 This goal is achieved by the fact that in a device for dispersing conductive materials, including a rotating electrode-tool, a system for supplying a working fluid to a treatment zone, a power source and a mechanism for supplying raw material to a treatment zone, the feed mechanism for the source material is made in the form of a metal strip and sequentially located roller systems for forming a trough-like profile of a metal strip and compressing it around pieces of dispersible material.

 In order to increase the stability of processing and automation of the dispersion process, the device further comprises an adaptive system that controls the speed of conveyor belt depending on the magnitude of the operating current.

 In order to obtain a powder with a high degree of dispersion without reducing dispersion performance, an option is provided according to which the electrode-tool is multi-loop with the electrical insulation of each circuit and the distance between the ends of the adjacent disks of the multi-loop electrode-tool is less than or equal to twice the interelectrode gap, and each circuit is connected to an independent power source.

 In FIG. 1 shows the proposed device; figure 2 and 3 - electrode tool.

 The proposed device comprises a drum 1 with a tape, a system of rollers 2 to give the tape a trough-like shape. Further, in the direction of movement of the tape above its surface is a hopper with a dispenser 3, filled with pieces of dispersible material; further in the direction of movement of the tape is a system of rollers 4 designed for crimping the tape with pieces of dispersible material; a nozzle 5 for supplying a working fluid to the treatment zone is located in front of the electrode-tool 6 and directs a jet of working fluid into the gap between the electrode-tool and pieces of dispersible material; a power source 7, as well as a tank 8 with a working fluid and a pump 9 are located anywhere near the processing zone; the drive motor with gear 10 is located under the roller system.

 The described device operates as follows.

 Start the engine 10, the inclusion of rotation of the electrode-tool 6, a power source 7 and a pump 9 of the working fluid. As the tape moves from it with rollers 2, a trough-like profile is formed into which pieces of the dispersible material from the hopper are filled. Moving further, the tape with the pieces of the dispersible material enters the system of rollers 4, which first bring the edges of the tape together, forming a pipe from it, and then compress it, reliably fixing the pieces of the dispersible material. The pieces of dispersible material fixed in this way fall into the treatment zone, where they are dispersed by an electric arc arising between the pieces of dispersible material and the electrode-tool 6. The working fluid is constantly supplied to the treatment zone from the nozzle 5. The resulting powder of the dispersible material is washed by the working fluid through the drain system into the tank 8.

 Figure 2 and 3 presents a sketch of a multi-circuit electrode-tool 6, consisting of three sections electrically isolated between each other by insulating spacers 11, and a diagram of its connection to power sources 7.

 The proposed device, in comparison with the known ones, provides the following technical and economic advantages: reducing the energy intensity of dispersion, which is ensured by maintaining optimal dispersion modes and eliminating the possibility of short circuits due to the use of an adaptive system; obtaining a powder with a given particle size distribution with high performance due to the use of a multi-circuit electrode-tool; relatively simpler installation design due to the rejection of the use of a sealed chamber with an inert atmosphere, a plasma gun, etc .; providing dispersion of pieces having different shapes and dimensions, due to their fastening in a deformable requirement, bent from a metal sheet.

Claims (3)

 1. DEVICE FOR PRODUCING POWDERS OF CURRENT-CONDUCTING MATERIALS, including a rotating electrode-tool, a system for supplying a working fluid to a treatment zone, a power source and a feed mechanism for supplying raw material to a treatment zone, characterized in that the feed material feeding mechanism is made in the form of a metal tape and sequentially arranged roller systems for forming a trough-like profile of the tape and crimping the pieces of the source material with the tape.  2. The device according to claim 1, characterized in that it is equipped with a tracking system for regulating the speed of movement of the tape and the feed rate of the source material on the tape, depending on the magnitude of the operating current.  3. The device according to claims 1 and 2, characterized in that the electrode tool is multi-loop with electrical isolation of each circuit and the distance between the ends of adjacent disks of the multi-circuit electrode-tool is less than or equal to twice the interelectrode gap, each circuit being connected to an independent power source .

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