DE1721331U - ARC WELDING DEVICE. - Google Patents

Description

UJKttOB CARBIDE AHD CARBON CORPORAiDIOH, New York 17,

(DSA)

Device for arc welding.

The present innovation relates to a device for Liohtbogenechweiaeen under protective gas with melting and mechanically tracked metal electrodes _a

According to the prior art, binding welding devices are known in which at least two sole electrodes are electrically connected to one another and to a matching voltage source and a Schraelzetoffuhreineinrichtung is provided to control the rod speed and to determine the Abetan aea and the angle between the rods around the Penetration into the workpiece, which does not form part of the welding fluid, is to be reduced to a minimum size. By restricting the weld to a common spot under a blanket of fusible welds and by relative movement between the electrodes and the workpiece, it is possible to form a weld deposit from a single coherent or continuous layer of electrode metal on the workpiece. In carrying out such methods ea is essential that the arc welding current hindurohflieset directly from the end of a rod to the other hauptaäohlioh through the molten weld mass and the Sohweisemetall, d "h _o not through the workpieces Attempts have also been already with argon protective cover instead of the Deoke of granular Schweiseniaterial made ) at least the welding process was maintained, even if the tension stability was sometimes quite irregular «

21h, 30/12. 172135LUnJoaCarbideÄJ V- '\ \

and Carbon Corporation, New York, N ^.: J Mfi / W &> L

Y. (V.St. A.); Representative: Dipl.-Ing. H.Göriz,, ^ia3 ° 7 ί

Pat.-Anw., ■ Frankfurt / M. | Contraption ' ; . , i

1 for arc welding. 11. 2. 55. '' ί

U 1309. V. St. ν. America February 12, 54. ' I ■ ^; :

.. ■ :. . ... ■■■■; ■. . . ■■ .-. . . 1σ x 6; _: _ζ. _{υ:; _;} __v ^ ._l _ ..: __> ■■■■■■

Furthermore, a Metalliohtbogensohwsissverfahren is known which a between the workpiece and a melting [

Metal electrode formed arc is encased in protective gas with j the arc is fed to an inert gas such as argon or helium, whereby the arc its power by direct current reverse polar |

tat receives (workshop as negative pole), in the case of a process the entire arc welding current flows through the work piece

Welds with metallic, especially steel electrodes, with the help of one of an elaatüaigen (Jas like argon or helium \ sobutzga8uiDhUllten ffeohseletrofflschvveissbogeng can be because of the peculiar instability of the electric arc only with Run difficulties. When testing with argon '' Protective, series-connected arc with awei steel electrodes resulted because the peculiar instability of the arc made it almost impossible to maintain the process *

An essential goal of the present innovation is therefore Elimination of such difficulties and, moreover, the ver ~ Realization of a welding device with melting electrodes without the disadvantages but with the advantages of both protective gas welding also cover the welding under a blanket Welding inasse. .

With the innovation, this task is solved by two in one at an acute angle to the weld seam, electrodes facing each other from one that does not quite reach the end of the electrode, the protective gas-carrying jacket are also surrounded by a welding unit with two output terminals, the one with the two Welding electrodes have connection, further by means of voltage control devices known per se, which control the automatic feed depending on the electrodes unwound from the supply rolls of the potential difference between the workpiece and the Regulate electrodes, as well as through a funnel opening above the arc. like alkaline earth silicate to be added «.

.1

r- 3

2Ih ^ 3O / 12f 1721531. Union Carbide "

and Carbon Corporation, New York, N. < Mb ι

Y. (V. St. Α.); Represent .: Dipi.-Ing. H. Görtz, ""

Pat.-Anw.,: Frankfurt / M. (Preparation /

for '■ * arc welding. 11. 2. 55. ' Lf-

U 1309. V. St. v. America 12.2.54. ' * '

0: 6Ζ

Duron the device after the innovation, the arc is stabilized j by moving over the surface of the workpiece enV along the sweat path a thin pushes out of a smaller, 2.B. powdered welding maize, e.g. one an alkaline earth metal silicate containing mass. · is distributed. Such a stabilization eich has proven to be particularly effective for arcs connected in series and directed against a common melting zone.

V Further characteristics of the hiring are also shown in the attached illustration of an exemplary embodiment as well as from the following description

Two welding torches 10, 10 are arranged so that an acute angle is formed between the ends of the wire electrodes 12, 12; the electrodes are located above the upper surface 14 of the workpiece 16, which consists of the plates 18, 18, the edges of which are butted together so that a weld joint 20 can be formed. The burners are fed with Schutagas in the usual way from the Druok gas sources 22, 22. The Elektroi.sa are fed at a controllable speed from supply rolls 24, 24 'by means of wire or rod conveyor motors 26, 26; which are equipped according to the veranschaulichtΘΛ Barstellung with Spannungssteuereinricütuagan 28, ■ 28 arbe'itüfti depending on the Po.tentialdifferena between the workpiece and each electrode A funnel 30, which the comminuted, z, B, granulated or powdered welding mass as alkaline earth metal silicate, is arranged in such a way that it distributes a flat layer 31 of the material along the line where the welding is to be carried out on the workpiece surface 14 near and at the connection point 20 opposite the welding arc which runs between the converging ends of the electrodes 12, 12 is formed by means of a Sehweissstroaquelle 32, the output string is connected to the burner 10, 10, while the input side £ - .; j Ketz 34, 34 is Λ

I and Carbon Corporation ,. New York, N. 3 ΜΛ /

! Y. (V.St.A.); Representative: Dipl.-Ing.H.Görtz; ; ''

Pat. Appl., - Frankfurt / M. j; Contraption ";

for arc welding. 11. · 2. 55.

U 1309. V. St. ν. America 12. 2. 54. -

During operation, the burners 10 »10 protective gas is supplied, 'which forms currents that mix so that a. A common current J $ arises, between the bathing of the electrodes 12, 12 in the gas flow 36, the welding arc is created. The electrodes are moved by motors 26, 26 at a predetermined, controllable speed towards the arc. At the same time, a relatively thin, sonically crushed alkaline earth silicate is applied by means of the Triohtere 30 to the work piece and in front of the front of the Llohtbogena, while the funnel and burner are moved together along the junction: 20 “The arc melts the metal at the ends of the electrodes, the silicate evaporates and also melts the metal of the workpiece at the connection point, so that the plates are welded to one another when they cool down and when the bends have passed

The preferred position of the electrodes for seam welding is yO ° vsrsotzt to that illustrated in the drawing, i.e. the Electrodes are preferably brought into the same plane in which the seam to be welded is located. Pure platings. oßo:>. "Another disguise formation is appropriate if the electrodes in a plane transverse to the direction of the relative Diffusion between electrodes when the workpiece is placed, as illustrated in the attached diagram.

Practical tests with the device according to Dar Heuer show that when a very thin layer, sB of about * _S 6 N-Vi thickness, of alkaline earth silicate granules is distributed over the surface. ■ '-.; -. “■ 'ci-kctUckea a stable arc of light was obtained. Except

-; Depth or thickness of this layer and the application of ^; .cranes for shielding 4 ·· light toogenes, were the conditions ... .'Oh those who were under plus-. '-ι, - · ... were generally used, the stabilizing effect'.-ο ·· ΐ thereby the result of the evaporation and ionization of the earth

2ih, 3ö / i2 ^ 172153ί. Union Carbide and Carbon Corporation - New York, NY (V. St. Α.); Represent .: DipL-Ing. H.Görfa, Pat.-Anw., 'Frankfurt / M. | "Device for arc welding. 11. Ί. 55. U 1309. V. St. v. America 12. 2. 54.; (T. 6 ;: Z. 1): .Ά :: /V·.·· . Λ; -.-.; / - ■ - ■ ^ - ^

3. «λ /

be alkalimetall8ililcate SU. Although the experiments were particularly aimed at the stabilization of crude-bonded arches, experiments also showed that there was a need to be careful with the preparation after the hiring. Continuous electric arcs achieve improved stability. He also pointed out that, regardless of the use of alkaline earth metal silicate for the realization of the innovation, other well-known arc-stabilizing elements, such as those from groups IA and IVB (as well as group IIA), are also used for periodic systems for the purpose of stabilization Arcs would be effective. Preferred bindings are comminuted, granulated or pulverized so white materials of commercially available masses and types «,

Claims (1)

21h, 30/12. 1,721,331. Union Carbide and Carbon Corporation, New York, N.Y. (V.St.A.); Representative of Dipl.-Ing.H.Görtr, Pat.-Anw., Frankfurt / M. | Arc welding device. 11.2.55. U 1309. V. St. v. America 12.2.54. Sohutzanepruoii Apparatus for Liohtbogenschweisaen under protective gas with decreasing ecboelzenden and mechanically tracked metal electrodes gelcenneeiohnet by two at an acute angle to the Sohweise- seam geriohtete electrodes zoom reaching each of a not quite up to dae end of the electrode, the shielding gas conducting cladding surrounded Bind, further by a Schweleaaggregat nit two output terminals, the flen with the two Schweiseelektro- compound have, on through to calibration known voltage ateüereinrichtungea which regulate the automatic feeding of the unwound from supply roll "electrode depending on the Potentialdifferena between the workpiece and the electrodes. _r as well as through a funnel opening above the arc to give the welding point a Sohweiseinaaae, such as alkaline earth silicate, EuzufUhren »