SU1761312A1 - Device for cleaning metal surfaces - Google Patents

Abstract

SUMMARY OF THE INVENTION: The device comprises 1 core of an annular electromagnet (1), 2 pulsed windings (2, 5), 1 DC holding current (3), 1 electromagnetic inductor (t), 1 insulating layer (6), 1 body ( 7), bolts (8), 1 surface to be processed

Description

The invention relates to devices for cleaning metal surfaces.

A device for cleaning metal surfaces is known, comprising a housing with an exciter equipped with an electromagnet, an exciter mounting unit mounted on the housing on a workable surface of the product, including a direct current electromagnet, a direct current source and a control action shaping unit.

The disadvantages of the known device are low technological capabilities.

The aim of the invention is the expansion of technological capabilities.

The drawing shows a diagram of the device, where 1 is the core of a ring electromagnet, 2 is a pulse winding, 3 is a DC holding winding, k is an electromagnetic

an inductor consisting of a pulse winding 5, pressed into the insulating layer 6, inductor C is located in housing 7, which is fixed concentrically (coaxially) in the annular magnetic circuit 1 by bolts (or studs) 8. Plate 10 is located between inductor C and the surface 9 to be machined 9 from a material with high electrical conductivity. The boom 1 1 is hinged to the housing 7, on which control buttons 12 of the control action unit are located. Inside the boom conductors 13 are passed from the inductor and electromagnet windings to the current pulse generator 1A and the DC source 15 The inductor housing 7 can be equipped eye-bopta 16 to move the device over the surface to be treated, if the surface to be treated is significant

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sizing and processing device

residual massively.

The device after switching on works as follows.

Using the rod 11 or the eyebolts 16, the device is installed manually or by a lifting mechanism on the surface 9, the control button 12 on the JQ 11 rod (or outside the rod, for example, on a separate control panel) is activated and direct current is supplied current 15 to the holding winding 3 of the direct current of the ring electromagnet. The constant magnetic field, closed between the poles of the ring electromagnet through the treated surface 9, holds the device on the treated surface at the desired location. Then the control button 12 is turned on - by giving a current pulse from the current pulse generator 1k to the winding of the inductor and to the winding 2 of the ring electron — 25 nits. With the passage of a current pulse through the winding 5 of the inductor k in the plate 10, a eddy current is induced, the interaction of which with the pulsed magnetic field of the inductor leads to the effect of electromagnetic shock between the inductor and the plate. The plate 10 transmits a shock to the surface to be treated 9. Under the action of an impact, a surface area localized by an annular electromagnet will oscillate at a natural frequency. The impact power, depending on the mechanical properties of the material of the surface, is chosen so that the deformation of the treated surface Q lies within the limits of elastic deformation. Short-term electromagnetic shock causes significant acceleration of surface points, in the order of 10 -10s, acceleration of the blue. At such accelerations, the sediment particles are detached from the surface. Since the same current pulse, which causes an electromagnetic shock, simultaneously passes through the ™ pulsed holding winding 2 of the ring electromagnet, the holding force at the moment of impact sharply increases: it keeps and holds the device on the treated surface.

Elastic deformation of the surface under

Electromagnetic shock also causes redistribution and reduction of residual stresses in

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The surface material of the device can be used to reduce residual stresses in the products and structures.

The current pulse generator can operate in a single pulse mode, each pressing of the button 12 triggers one pulse, or in a pulse train mode, 20 or more current pulses are switched on with one switch on. After processing one section, the device is moved to the next, or the movement can be carried out continuously by scanning the entire surface.

The ring electromagnet can be made with an W-shaped core, as shown in the drawing, or with a U-shaped. More precisely, the core of the electromagnet is not a continuous closed ring, but is made arcuate, with an almost closed arc, but with a gap between the ends of the arc so that windings can be laid. If the magnetic properties of the treated surface are quite high, the electromagnet can be made in the form of several separate conventional W or P or rod electro. magnets located around the circumference (the area to be processed and united in a single design by a 7 ° casing. In addition, the electromagnet can be made continuous annular, as power electromagnets with cylindrical magnetic cores are made, in this case the hole of the required diameter should be made in the center of the frame In any of the variants, the magnetic lines of force are closed between the poles along the shortest path through the surface to be processed, thus localizing the surface area, creating a a physical boundary reflecting elastic deformation waves that are excited at the center of the section.

A capacitor type generator can be used as a current pulse generator.

Plate 10 between the inductor and the surface to be treated is made of a material with high electrical conductivity, copper or aluminum. The plate can be made bimetallic, while the layer facing the inductor is made of an electrically conductive material, and the layer forming

Schenn; y to the treated surface, from a material with high strength.

If the machined surface is curvilinear, for example cylindrical or conical bunkers, pipelines, then the working surfaces of the electromagnet and the inductor are also curvilinear, along the profile of the surface being machined.

The use of the invention allows to expand the technological capabilities of the device.

Claims (2)

1. A device for cleaning metal surfaces, comprising a housing with an exciter equipped with an electromagnet, an exciter mounting unit mounted on the housing on a workable surface of the product, including a direct current electromagnet and a direct current source, characterized in that equipped with a current pulse generator, and an electromagnet , n five five 0 126 The direct current of the exciter attachment unit on the treated surface of the product is made in the form of an annular magnetic conductor fixed in the lower part of the body with the first impulse winding placed inside it and the DC retaining winding being made in the form of the second impulse coil pressed into the insulating layer in the lower part of the housing coaxially relative to the ring magnetic circuit, with the conclusions of both impulse windings and the holding winding of a constant t ka are respectively connected to the outputs of the generator current and the constant current source pulses, and the working surface of the annular magnetic housing and formed on the profile surface to be treated of the article. 2. The device according to claim. Characterized in that it is provided with a plate of electrically conductive material located between the working surface of the housing and the work surface of the product.