SU1017456A1 - Induction heater - Google Patents

Abstract

1. for high frequency fusion welding across the edge of metal parts of complex configuration, which contains a liquefying wire with fins and a magnetic core, characterized in that, in order to improve the quality of welding by reducing the heat-affected zone at the places of curvature change, the curvature is made solid, and in the rest of the sections with a gap between the rom and the poles, located flush with the current-carrying surface of the inductor, and the ribs are mounted on the side non-current-carrying sides They are inductive wires and are made of a material with high electrical conductivity, and they separate the sections of the magnetic circuit with different conductivity. . . 2, the Inductor according to claim 1, of which is provided with an ecc wound installed inside the inductor and isolated from the ribs.

Description

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The invention relates to welding and electrothermal technology and can be used mainly for uniform heating with simultaneous high-frequency fusion welding along the beaded edges of thin-welded metal products of complex configuration, for example, when welding the bottom or the lid to the body of a capacitor or battery.

 There are known methods for obtaining equally heated edges of a complex configuration to a predetermined depth, by redistributing the concentration flow of a stream, changing either the distance from the conductor to the heated surface, or the form of the inductor, or magnetic conductivity. In some cases, C screens are used.

These methods do not allow uniform heating because of the following disadvantages due to npH csTffiHx. : A change in the induction width, wire or distance between the conductor and the part leads to an increase in the heating zone and its irregularity. The change in the magnetic conductivity of individual sections does not avoid shunting the magnetic flux to adjacent areas, which leads to undercuts in places where the curvature of the heated edges changes .

A known inductor for high-frequency fusion welding along the flanged edges of metal parts of complex configuration, comprising an induction wire with ribs and a C23 magnetic circuit.

The disadvantage of this inductor is an increase in the heating zone by. straight line plot. In addition, / its placement when welding small-sized parts is difficult due to the increased (about 2 times) width of the eductor.

The aim of the invention is to improve the quality of welding by reducing the heat-affected zone in places of change of curvature.

The goal is achieved by the fact that in the inductor For high-frequency fusion welding on the flange 1to the metal parts of a complex configuration containing an inductive & wire with ribs and a magnetic circuit on the magnetic circuit on the section CG. large curvature is made, and in the remaining sections with a gap between the rom and poles, it is located flush with the conductor surface of the inductor, and the ribs are installed on the lateral non-conductive sides of the inductive conductor and are divided by sections of the magnetic conductor with different conductivities.

In addition, it is equipped with a screen mounted inside the inductor and insulated from the ribs.

FIG. 1 shows an inductor, axonometrics; in fig. 2 is a scan with a view of the side of the hover surface r in FIG. 3 - sweep of the inductor without edges) in FIG. 4 - inductor, general vnd.

The inductor consists nz induktiruyuschey wire 1, in which the surface

2, welded to edges.

3 is the current lead, and the side surfaces of the induction wire are non-conductive, on which fins 5 are made of a material with high conductivity.

The conductor lines on the straight sections - the poles 6 are located on the leading ropes, the sides of the inductor, and between them and the magnetic conductor .7 there is an air gap 8. In the corner between the ribs, the magnetic conductor 9 is continuous. A magnetic field concentration 10 gives the magnetic induction lines. Inside the inductor, a screen is usually placed, 11. A cooling coil is passed through the channel 12.

The inductor works as follows.

The high-frequency current through the induction wire 1 forms a field reinforced in the areas of greater curvature (at the corners) - where continuous magnetic cores are installed without gaps between pole 6 and Rome 7. Shunting of a magnetic field is limited by a rib 5, This effect is removed (FIG 2 and 3V on the scan of the corner section with a view of the surface of anvokedushy.The intensity of the magnetic flux 10 between the edges (Fig. 2) is greater than in the absence of edges (Fig. 3). The attenuation of the magical jiHTHoro flux on the outer sections is due to po: in, and The restriction zone termovli audio poles produced 6.Dopolnitelny screen 11 may optionally also contribute umensheniyu.shuitirsi Vani magnetic flux..

The proposed inductor in comparison with the prototype provides the possibility of welding without burning the insulation with a uniform melting of the edges.

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Claims (2)

1. INDUCTOR for high-frequency fusion welding along flanged edges, metal parts of complex configuration, comprising an induction wire with fins and a magnetic circuit, characterized in that, in order to improve the quality of welding by reducing the heat-affected zone in places of curvature change, the magnetic circuit . * The sections with large curvature are solid, and in the remaining sections with a gap between the yoke and the poles located flush with the current-carrying surface of the inductor, and the ribs are installed on the side non-current sides of the induction wire and are made of material with high electrical conductivity, while they separate. sections of the magnetic circuit with different conductivity. . 2. Inductor pop. 1, it is important that it is equipped with a shield installed inside the inductor and isolated from the ribs.