RU1811457C - Process of welding with magnetically controlled arc and device for its implementation - Google Patents

Abstract

use: welding by a non-consumable electrode in a protective gas atmosphere with a controlling magnetic field. SUMMARY OF THE INVENTION: The control arc is controlled by a rotating rotating magnetic field, which generates by passing a single-phase alternating current through the electromagnet windings with a phase shift in adjacent windings of 90 °. The device comprises a magnetic circuit with four poles on which the windings are located. The poles of the magnetic cores are diametrically opposed. The device comprises a power supply with a winding current control circuit. The control circuit is made with variable resistances and a phase-shifting element, which allows expanding the limits of regulation of the magnetic field parameters. 2 s.p. f-ly, 2 silt, 1 tab. (L

Description

The invention relates to welding, in particular to methods of welding with a non-consumable electrode in a shielding gas medium with a controlling magnetic field, and can find application in the manufacture of welded metal structures.

The aim of the invention is to expand the technological capabilities of arc welding by expanding the limits of regulation of magnetic field parameters.

Fig. 1 shows a diagram of a device by which an arc welding method is implemented; figure 2 - the shape and location of the poles of the electromagnets relative to the electrode and the plate.

The device contains a welding torch 1, a magnetic system consisting of two pairs of magnetic cores 2 and 3, arranged mutually perpendicularly and two windings 4, 5, powered by single-phase alternating currents 90 phase-shifted, for which the windings are connected to a single-phase alternating current network through a control circuit comprising a phase-shifting element 6, resistance variables 7, ammeters 8.

The method is carried out using the device as follows.

When the power supply of the windings is turned on, a rotating magnetic field is created in the arc burning zone, rotating

ate

Xi

with

whose magnetic induction vector is perpendicular to the axis of the electrode. If the currents supplying the windings are equal, we obtain a magnetic field that moves the arc along a circular path; for various values of currents regulated by variable resistances 7, the path acquires an elliptical shape. By equalizing zero current in one of the windings, it is possible to obtain, respectively, longitudinal or transverse oscillations of the arc.

PRI me R.

A non-floating tungsten electrode was welded in an argon medium to a 4 mm thick stainless steel plate. The welding was performed by direct current in direct polarity. Current strength 200 A, voltage on the arc 10 V, welding speed 25 cm / min, electrode diameter 3 mm, sharpening angle 45 degrees, arc length 2 mm.

Parameters of the magnetic device. The magnetic core is made of steel St 3, the cross section is 15x1-5 mm. The windings of the coils are made of PEV-2 brand wire with a diameter of 0.63 mm. The number of turns in each of the four coils is 1600.

Claims (2)

1. A method of welding by a magnetically controlled arc, in which the welding arc is affected by a rotating magnetic field, adjustable in magnitude of the strength and shape of the lines of force, and the field is obtained by passing current through the windings of the electromagnets, and so on and so on. that, in order to expand technological capabilities by expanding the limits of regulation of the magnetic field parameters, a single-phase alternating current with a phase shift in adjacent windings of 90 ° is passed through the electromagnet windings, 2. A device for welding by a magnetically controlled arc, comprising a magnetic circuit with three poles and windings located on them, a power source with a winding current control circuit, and so on, in order to expand technological capabilities by expanding the limits of adjusting the parameters of the magnetic field, the magnetic circuit is equipped with a fourth pole with a winding, the poles are diametrically opposed, the control circuit is made with two Variable resistances and a phase-shifting element. Note. Through penetration. fs / f. g Compiled by E. Dondokov Editor G. Belska Tehred M. Morgenthal Corrector M. Kul Order 1459 Mintage Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the USSR State Committee for Science and Technology 113035, Moscow, Zh-35, Rauska nab., 4/5. ----: ------.--- „-. -------------- .----------------- -----------. --------------------- .-: -------------- .Production and Publishing Plant Patent, Uzhgorod, 101 Gagarin St.