SU1389958A1 - Arrangement for brazing with electric resistance - Google Patents

Abstract

The invention relates to soldering, in particular devices for soldering by electrical resistivity. It can be used for soldering short-circuiting rings of rotors of large electric machines. The aim of the invention is to enable the soldering of large-sized products. The device contains a base 1, on which a support 2 is fixed for installing a baked product, a hollow hollow and having supporting platforms 3. On one of the supporting platforms there is a stand

Description

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ki 4, installed between graphite electrodes 8, and on the others, spring-loaded, I1 for electrodes. The hinges are hinged on the middle part of the contact surface of the electrodes. The device has p (n - integer 1) pairs of electrodes, individually connected to the secondary windings of the transformer. The device allows to increase the reliability and durability of the manufactured products, reduce labor intensity, increase soldering performance by 3-5 times. The device also permits the replacement of gas-flame soldering with soldering with electrical resistivity. 2 Il.

The invention relates to soldering, in particular, to a device for soldering with electrical resistivity, and can be applied in mechanical engineering, in particular in electrical engineering, for soldering short circuits (short circuits) of large electric machines.

The aim of the invention is to enable the soldering of large-sized products.

FIG. 1 shows the proposed device, front view, with a rotor to be steeped; FIG. 2 - the same, top view, without a falling rotor.

The device consists of a base 1, on which a support 2 is fixed, having in its upper part protruding supporting platforms 3 and supports 4.

Bearing 2 is located in the bore of the transformer, equidistant configuration of the melted product. The transformer consists of the core 5, the primary winding 6 and n (is an integer) of the secondary windings 7 (in this case, five identical secondary ob-hanks, distributed evenly along the perimeter of the core 5).

Each of the secondary windings feeds one pair of graphite electrodes 8, through forcibly cooled current leads 9. The total number of graphite electrodes.

The current leads 9 are supported through the hinge interface 10 on the spring-loaded harnesses 11, made in the form of spring struts. The hinge interface 10 is located under the center of the contact surface of graphite electrodes 8 with a coupling short circuit. ring 12. Discharge spring 11 through electrically insulating gaskets 13 support5

They are located on the supporting platforms 3 located below it, which structurally can be made either in the form of brackets or in the form of a flange fixed on the support 2.

The welded product is supported by the heated part 12 on racks 4, made in the form of flat brackets of steel, having low thermal and electrical conductivity, attached (welded) to the support 2.

The current leads 9 are connected to the terminals 14 of the secondary windings by two flexible current-carrying conductors 15, - located symmetrically with respect to the clamp 11.

The current leads 9 and current-carrying conductors 15 are cooled with running water, for which channels, 16 are made in the current leads, and the flexible current-carrying conductors are enclosed in hoses 17.

Water from the dispensing manifold 18 enters through hose 19 into hose 17, cools current-conductor 15 located therein, then passes into current lead 9, cools it and drains through second hose 17 and hose 20 into collector 21.

The pins of all secondary windings 0 are attached to a disk 22 made of an electrically insulating material.

The planes of the arrangement of the leads of the secondary windings, the supporting platforms .3 and the pillars 4 are mutually parallel and. 5 perpendicular to the longitudinal axis of the support 2 ..

The device works as follows.

In the free state, prior to the installation of the rotor, the graphite electrodes 8 protrude to a predetermined

The size (4-6 mm) above the 4-post stands is established by a short circuit. ring on racks 4. Under the action of the weight of the rotor, reviving the total force of resistance, pressing the springs, the electrodes with the current leads are recessed, self-adjusting at the hinges 10, This ensures a tight fit of the graphite electrodes to the K-3. JQ ring and pressing them with the same force, the value of which is determined by the amount of compression of the spring of the compressors.

For soldering the rotor of another size, having a different diameter K, C ,. The J5 rings are rearranged in the radial direction of the graphite electrodes 8 and the hinges 11. The latter are fixed by slots 23, made for all of the provided positions of the graphite 20 electrodes.

Shaft 24 of the brazing rotor is positioned 2TS inside the support 2,

When the transformer is turned on, the heat released in the graphite electrodes and their contact with k, h. ring, it warms up. From k.z. the ring - heated portions of the cores of the winding 25 and laid on it

doses of solder. The solder melts and solders.

After soldering the first to, h. the rotor rings are lifted, inverted by 180 °, and produced second Kg, 3. rings. Use of the device for the soldering kz. The rotor rings of large electric machines instead of the gas-flame brazing used provide an increase in reliability and durability due to the simultaneous fulfillment of all soldered short circuit connections. rings, which determines the minimum level of mechanical residual stresses, and thanks;

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a higher quality of soldered joints, due to obtaining end-to-end more intensive and uniform heating for brazing; improvement of working conditions as a result of the replacement of manual labor in the hot zone;

The ability to manufacture massive rotors, which require the performance of a paired connection of the KW. rings with a rotor barrel; decrease in labor intensity as a result of an increase in soldering productivity by 3-5 times and elimination of the need for implementation in short circuit. rings of cuts and undercuts to allow heated areas to the required temperature; elimination of the consumption of calcium carbide (acetylene), related to critical materials.

Claims (1)

Invention Formula A device for electric soldering, containing forcibly cooled current conductors with individually pressed graphite electrodes connected to a transformer, and a support for installation, distinguished by. that, in order to solder the croup of large-sized products, it is equipped with n (n - integer. number 1) pairs of electrodes, individually connected to the secondary windings of the transformer, and electrodes, the bearing is made in the form of a hollow structure placed in the bore of the transformer having racks accommodating the paired parts located between the electrodes and the support sites on which the spring-loaded electrodes of the electrodes are hinged, which are hingedly connected to the current leads under the middle part of the contact surface of the electrodes. 22 ig.2 Compiler L.Abrosimova Editor I.Nikolaychuk Tehred L.OlijnKorrector A.T. sko Order 1617/14 Circulation 921 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 P U Subscription