SU955527A1 - Multi-turn inductor for part heating - Google Patents

Description

The invention relates to electrothermal, in particular to the heating of metals, and relates to devices for induction heating.

A known inductor for heating products, comprising a rigid frame in which a frame with a winding is placed, on which clamps are fixed to create a certain gap between the inductor and the product. The skeleton is formed by a series of parallel-mounted elements parallel to the axis of the inductor, to which each turn of the conductor winding is attached.

However, the known inductor due to the rigidity of the construction of the coils is not universal. It cannot be used for heat treatment of products of various sizes, for example, large-sized shells, the heating zone of which has a different configuration as in forming s & expense grooves, and around the perimeter due to local thickenings. In this case, in order to preserve the air gap, which determines the heating characteristic, it is necessary to have a separate inductor for each conical or curved surface of the product and for each its size, which limits the technological and functional capabilities and versatility of the device.

The closest to the present invention is a MULTI-REVOLUTION inductor for heating, containing a solenoid coil of flexible conductor and a movable frame 2 fastening it coils.

ten

This device allows the configuration of the inductor to vary along its length, but not over the cross section, i.e. does not provide uniform heating of parts difficult in cross section

15 configurations.

The purpose of the invention is to increase the uniformity of heating of parts of complex configuration.

The goal is achieved by

20 that in the inductor the movable frame is made in the form of U-shaped elements homely mounted on the inner surface of the coil, the transverse sides of which are equal to the height of the coil, are parallel to the axis of the coil and are adjacent to its inner surface, , perpendicular to the axis of the coil, on the frame,

Claims (2)

30 covering KaTSOUKy outside. Figure 1 shows the inductor, general view; figure 2 - node I in figure 3; 3-5 are embodiments and configurations of frame elements and winding arrangement. The inductor contains a carrier frame on which a frame is made of a series of U-shaped elements 2, on which winding 3 of flexible conductor with thermal insulation strip 4 is placed underneath it. U-shaped elements 2 are facing downward inside the inductor, are in rad planes and are fastened to frame 1 through electrically insulating gaskets 5 with nuts 6. Each U-shaped element 2 is assembled in three parts; two vertical ends 7 and a transverse side 8. The length of the cond and the shape of the transverse side are chosen depending on the dimensions of the product E and its configuration. The ends 7 are a bar of non-magnetic steel with a thread at the ends, and the transverse side 8 is a tube with an internal thread. For the bracket assembly, the ends are screwed into transverse sides. The installation works as follows. . . After installation of the product 9 and the carrier frame 1 — Depending on the dimensions of the product, its configuration and the width of the heating zone, choose the size, shape and number of U-shaped components, which are mounted on frame 1 with a fixed gap relative to the product. Then, a thermal insulating pad 4 is placed on the transverse sides of the elements, over which the winding 3 of the flexible conduit is wound. The number of U-shaped brackets is selected depending on the size and configuration of the product so that the turns of the electrical conductor repeat the shape of the product. The number of turns of the conductor is determined by the heating conditions. Thus, at the same i design of the inductor frame, it is possible to change the tuning dimensions of the U-shaped elements and their number to obtain an inductor for heating products of various shapes and sizes. If it is necessary to rotate the product, the air gap remains unchanged, which is not achieved in the known structures with flexible conductors. If necessary, heat the product with local thickenings, tides, branch pipes, etc. It is easy to ensure that the inductor repeats the shape of the product being transformed by adjusting the framework and flexible conductors, which is impossible with a rigid construction of the inductor turns. Invention Multi-turn inductor for heating parts containing a solenoid coil of flexible conductor and a moving frame fastening it turns, which, in order to increase the heating uniformity of parts of complex configuration, the moving frame is made as a series of U-shaped elements, the transverse sides of which I are made of a length equal to the height of the coil, are parallel to the axis of the coil and adjacent to its inner surface, and their ends are fixed to zhno in a plane perpendicular to the coil axis on the frame, embracing the outside coil. Sources of information taken into account during the examination 1. USSR author's certificate No. 2777143, cl. R 05 B 5/18, 1970. 2. USSR author's certificate. 400061 ,. cl. H 05 B w / ST, 1971.