SU1444373A1 - Installation for heat treatment of strip - Google Patents

Abstract

The invention relates to installations for the heat treatment of a tape in a stream with electrocontact continuous heating. The purpose of the invention is to improve the quality of processing by reducing tape warping. The installation contains an electrocontact device with two contacts, a cooling device placed between the contacts, a drawing device, electroconductive clamps, whose working surfaces correspond to the cross-sectional shape of the tape. The clamps are placed between the cooling device and the second contact along the tape movement. Prizhi №1 made in the form of blocks electrically isolated from each other plates. Clamps can be made from a dielectric, for example, from ceramics. They can be equipped with wear-resistant inserts. During the operation of the installation, the form of the tape is fixed by clamps, therefore its distortion is reduced. 5 hp . ly, 2 Il. (L

Description

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The invention relates to heat treatment in a stream with electrocontact continuous heating of a moving metal strip,

The purpose of the invention is to improve the quality of processing to notice a decrease in the amount of warp tape.

Figure 1 shows the installation, General view; figure 2 - section aa in figure 1 about

The installation contains a drawing device, made in the form of two Babin 1 and 2, an electrocontact device, made in the form of two current-carrying contacts 3 and 4, a cooling device 5 and two clamps 6 and 7 (respectively, the upper and the lower). The motor has a rotational drive (not shown). The current supplying contacts 3 and 4 of the electrocontact device are connected to the power supply. The cooling device 5 is made in the form of a bath connected by nozzles 8.9 and 10 to the circulating cooling system o Tank 11 and electric pump 12.

The clamps of the tape 6 and 7 consist of metal plates 13 and spacers 14 of dielectric material between them. In addition, the plate 13 is isolated from the metal parts of the installation gaskets 15 and 16.

The surfaces of the clamps 6 and 7 are equipped with wear-resistant inserts 17, for example, of carbide plates, which increases the life of the clamps

The clamps 6 and 7 can be made entirely of dielectric, for example, ceramic, or other composite material. In this case, there is no need for gaskets 14 - 16. The surfaces of the connector of the cooTBeTCTBynjT clamps are the cross-sectional shape of the heat-convertible tape, i.e. the clamps can be replaceable depending on the shape of the heat-treating tape (flat, concave, corrugated, etc.).

The upper clamp 6 is mounted for movement to the lower clamp 7 by the force of the load-forming unit, made in the form of a hinged lever 18 and the load 19, having the possibility of adjusting movement on the lever 18. Clamps 6 and 7 are placed between the cooling device 5 and the second the movement of the heat-absorbing tape 20 by the current-carrying contact 4.

The performance of the clamps of the tape in the form of stacked blocks of metal plates and located between them

The Q gasket of dielectric material provides the ability to place the clamps between the current-supplying contacts, as. without breaking the current path

5 on the tape. The same is achieved when the clamps are made entirely from a dielectric, for example, from ceramics. The installation of the installation with non-conductive clamps, the working surfaces of which correspond to the cross-sectional shape of the heat-convertible tape and are placed between the contacts, makes it possible to fix the tape between the surfaces of the connector of the clamps in the section of the tape under the current.

The placement of the clamps between the cooling device and the second in the course of the movement of the tape contact or

The cooling device itself provides a fixation of the cross-sectional shape of the tape immediately after cooling or during the cooling process, Toe. at the time of the kinetic plasticity effect, as a result of which the amount of tape warping decreases.

When clamping in the form of blocks electrically insulated metal plates from each other with a small thickness of the plates, the clamps will be non-conductive in the direction of the tape movement, since the metal plates are not electrically connected to each other, and the current in each plate separately due to a small voltage drop. in the area equal to the thickness of the plate, and the presence of a relatively large transitional contact resistance between the rubbing surfaces of the tape and the plate will be negligible, almost not casting on heating tape

The installation works as follows.

5 way.

Heat treatable tape 20 is wound from Babina 1 and continuously at a constant drive speed of 5

0

five

0

neither babin 2 pass through the installation. In this case, power supply is supplied to the tape by current-carrying contacts 3 and 4, due to which it is heated in the area between the contacts. When entering the cooling device 5, the tape is quenched, and then, between the cooling device 5 and the current-supplying contact 4, the tape is reheated (for example, during tempering), while its shape is fixed between the clamps 6 and 7 o. that the clamps 6 and 7 are in contact with the drawn tape 20, the current flows along the tape, and not along the clamps, since the metal plates are insulated from each other by gaskets 14, as well as from other metal parts of the installation — gaskets 15 and 16.

During installation, the form of the tape is fixed between the working surfaces of the clamps 6 and 7, protected by wear-resistant inserts 17. The load of the upper clamp 6 is effected by the force developed by the load 19 through the lever 18. The quenching medium by means of an electropump 12 continuously enters the device 5 cooling, and from there by gravity flows through the pipes 9 and 10 into the receiving tank 41 "

This heat treatment installation provides a reduction in the amount of warping of the heat-treating tape and allows you to maintain the original shape of its cross section.

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1444373

as a result, a yield is achieved.

Claims (6)

1. An installation for heat treatment of a tape, containing a heating device in the form of a current source and current-carrying contacts connected to it, a tape cooling device located between the contacts, a tape drawing device, which, in order to improve the quality by reducing the warping of the tape, the installation is provided with dielectric clamps with working surfaces that repeat the profile of the tape placed between the contacts. 2. Installation according to claim 1, characterized in that the pressing is placed between the cooling device and the second contact in the direction of movement tapes about 3. Installation under item 1 ,,. This is due to the fact that the clamps are installed in the cooling device, 4. Installation in accordance with paragraph 1, clause 1, clause 1, so that prizhiv number 1 are made in the form of blocks of plates electrically biased from each other, 5 o Installation of PP, 1 and 4, characterized in that the clamps are made with interchangeable inserts mounted on the plates, 6. Installation according to claim 1, characterized in that the dielectric clamps are made of ceramic, / J S / L Phys. 1 17 Phil 2