DE3430371A1 - Equipment for overhead submerged-arc welding - Google Patents

Abstract

The equipment for overhead submerged-arc welding includes a container (1) for the welding flux (2), said container being provided with a welding head (12) with a nozzle (13) for a self-consuming electrode (14) and with means for supplying and pressing the welding flux (2) against the welded part (3) in the region of the nozzle (13), and a shaping device (17) in the region of the nozzle (13). The container (1) is coupled to a suspension so as to be able to rotate about the shaft (18) of the suspension. The shaping device (17) and a copying element (19) are also mounted on the same shaft (18). The equipment is also provided with individual means for rotating the container (1) about the shaft (18) of the suspension and with means for pressing the shaping device (17) together with the copying element (19) against the welded part (3). <IMAGE>

Description

PATENT ADVERTISEMENT Dipl-FhVs. ^: - ":" RlCiHÄRD LUYKFM '3430371 ν

P 92 245-M-61-3 - August 17, 1984

BESGHKEIBUITG DJR INVENTION

The present invention relates to equipment to the. Arc welding, and in particular relates to Equipment for overhead submerged arc welding.

c _ This is particularly useful; ¹ To use the invention for welding Län & s- and rotatable collar welding joints in the production of parts with different thicknesses of welding plates.

In the production of steel constructions is not necessary a considerable amount of work on welding Hollow parts with limited access to the weld joints from the inside. Such joints include runa weld joints closed vessels and housings, circular welding joints from Pipelines, assembly joints and outer skin seams of ship hulls as well as seams of difficult to turn flat sections, sheet metal constructions i.a.

Overhead SAW welding is characterized by

that the weld pool compared to submerged arc welding in North

o '

mallage is served by 180, as it were, whereby the welding

powder and the electrode to the welding point in the seal of ι

downwards upwards, ie, as it were to the ceiling above the head, while the electroda ^ ^{uron is} passed through the compacted sohwe ilipulvar. That is why this type of welding is referred to here and below as overhead submerged arc welding .

As a result of such welding, £ O \ _, Q- called overhead seams are formed.

.3 in such a welding process is also called üoerkopf Metal arc immersion welding is called because the arc burns in the thickness doc ..retails.

In overhead welding, the jet of a sweat bath formed in the scissors arc by melting the scir.veiß; net, al 1, electrode material and welding powder is held by a crust of the partially screeched powder or by a shaping surface.

From the bottom of the weld us is welding flux forcibly pressed against the weld and the extent of consumption of welding powder will be ■ *

EPOCOPY Hl BATH

Stock constantly renewed.

To form the upper part of the seam, the welding powder can be either anion or opal L: - ;. vi; jchen the edges of the welding piece as well as from above! ' one any known "way can be supplied," whereby a Weld bed is formed.

The main difficulties in overhead welding are that the welding bath ira welding process must be kept in suspension, which leads to the instability of cer characteristic values of the weld pool, whereby the formation of a perfect weld seam is difficult.

A particularly large number of problems arise with welding the joints of large-format parts with cylindrical fora and!

a different form, for example from boiler!

units, hulls and receptacles, the one. j

require particularly high quality welds and ^: j

must be rotated around its axis during welding work pen, üowic of large flat areas ilen böiapialaweise

^{ by Jilechkonkt ionen that. difficult to find when welding; j

20 can be turned. j

The Uber head seams can be of various types, ^eg acting as Überkopfwurzel- and Überkopfkappnänte. The overhead root seams include seams that are executed first when welding a joint and that are located in the | oThe part of the welding cross-sections are located on the opposite side of the joint of the lead I electrode. The further welding of the joint, ie the execution of subsequent seams, is done on any known one;

Way with feeding the electrode from the same side as with the execution of the overhead root suture.

Overhead arc welding of the V / urael seams is permitted; es, welding operation "inside the vessels when welding rotatable sutures, essentially uuszuöctj Lio: .Jon i-owic da / j Sciiwc iij« u (; oradlinii ⁱ ; Qr Niihtc in l \ on strukI ionen with a branched access from the dakke on the opposite side in closed rooms that are difficult to access.
r The lap seams include seams that occur during welding

J BAD ORIGINAL

one joint executed first and the one in the lower Part of the welding cross-sections on the feeder ν electrode are located closer to the side of the joint. The joint can be welded to any other joint known method with the feeding of the electrode from the opposite in comparison to the overhead welding Side of the weld joint.

Iu dor Pruxia became the Vv'urzaliuihte with the Lichwu iliüa. of overhead dog and overhead longitudinal welding joints or building parts with limited access to the welding joints from the inside and the fell seams when welding longitudinal welding joints of difficult to turn parts, for example sheet metal structures made from segments, and other elements.

When welding lap seams, many problems arise with the formation of the surface of the finished weld seam, the quality of which essentially depends on the correct selection and stable maintenance of the specified pressure values of the welding powder and the type of action of the shaping device and the compacted welding powder in the welding process depends on various sections along the weld joint that is in the height of the arc, namely on the section in front of the arc in relation to the tfich forming Haht, on the Abachuitt, on dom dor the arc burns and the weld pool is and on the section of training the weld seam.

It is a device for overhead submerged arc welding (SU inventor Schein 526470, B 23K 9/18), in which the Electrode from the lower side of the welding foot through a Containers with welding powder formed by two straps one housed in it on r'ormirchuh and eir.Oi'i by dieuen continuous mouthpiece that is rigidly attached to the welding machine are guided.

When overhead welding with the help of such a device are elongated on different sections., eggs Welding joint through the welding powder and the foruigebande The device produces the same pressure values, which makes it unstable Keeping the weld pool relative to the level of the sweat

BADORLGiNAL 0

joint and a disruption of the overhead arc welding process and the formation of weld defects "in welded joints leads.

"*" It is also possible to use a device for overhead UP welding

ßen (SU ^ rflndc5rschein 46955 ^ B 23 K 9/1 ö, B 23 K 37/06) known, containing a container of welding powder, the with a mouthpiece and an ulittel for feeding the welding flux is provided "

A regulating plate "is mounted in the container with the possibility of regulating their location relative to Surface of the welded part with the help of a set screw b3 is fixed.

In the welding process, the welding flux and the Electrode through such a device of the weld joint under control of the welding flux pressure on the sections fed along the welding joint from below, including the regulating plate is used.

When welding with such a device tracked the machine operator the course of the welding joint and regulates in the event of a deviation in the characteristic values of the joint connection for example, the size of the gap between the edges of the welded part, the fi'e angle of inclination of the plate maintain the required welding flux pre-pressure, because it is essential for flawless overhead welding (like the Investigations have shown) it is necessary to check the specified pressure values of the welding flux on different levels. cut along the welding joint must be adhered to very precisely, as otherwise inferior weld seams will result.

The quality of the seam to be formed depends on the Welding with this device of the valencies and the experience of the machine operator, which often leads to poor quality welds.

- Such a device allows overhead root sutures to be made to be welded while it is unsuitable for overhead cap welding because it is flawless Formation of the surface of the finished lap seam using only the welding powder (like the investigations have shown) difficult and practically impossible Int.

■ The welded connections made with this device have errors in the formation of the outside of the finished seam, which is necessary for the formation of the felled seam are characterized by a layer of welding flux and in the form of! [inherit, local Schwankurigan of the seam width occur among others.

The invention is based on the object of a device to create overhead UP welding in which it by means of a corresponding structural design of vibrators for the interaction of the container and the ^ chwe i; ipul ~ verse with the weld joint as well as means for pressing it to the welding zone becomes possible, the process ^ s Welding of overhead seams, preferably of overhead root and overhead lap seams to be performed automatically

as well as to generate predetermined pressure values on different sections along the welding joint and to be constant to keep the necessary for the formation of perfect welded joints essential si ad.

This is achieved by the fact that in a device for overhead SAW welding, which has a . ken of the welding powder to the welding part provided in the teeth of the mouthpiece container with the welding powder and a shaping device arranged in the vicinity of the mouthpiece, exactly according to the invention, the container is articulated on a suspension and rotatable about the axis of the suspension, whereby aui " This Achue also arranged the shaping device and a copying element

JO and the device with the means for rotating the container around the axis of the suspension and with a iiittel for pressing on the shaping iSinrichtunc with the copier element is provided on the welding part.

No such structural design of the device, in the on the axis of the suspension of the ..- JeLlLIt, er3 dna Kopiöralemunt and dia t'onni - ^ .- bundu iilnrichL-iac; .-indoor dna t are, as well as the equipment of the forxgeöenden .einrichtung in addition to the copying element with individual .means,

for pressing against the welded part and that of the container with a means of rotating it around the axis of the suspension allow the fourth of the pressing force for the

* f ovingcbondo ώίηrichtung and the Kopiorüloiriont as well as don for the means for feeding Lind oes pressing the To regulate welding powder to the Lcnv / eic part separately,. what gives the form-giving device the solubility affect the seam to be formed directly without the To influence Cchvjeisspulverkissen practically significantly, whereby a high surface quality of the felled seams is obtained.

The term "üchweisapulverkiesen" refers to the area a compacted, compressed Lchweiß spulv appeared understood, the one over the total area of the welding powder cushion evenly distributed Has pressure and between that facing the Schvjeisteil upper surface of a bowl-shaped housing and the Surface of the Schweisabcilcs lies on the surface the Schwoisf..fuge in dor £ jchv; cicszone exerts a pressure.

In the Vo rriclibuiij ;; η'κ -, 'η dor iüri'Lriilunj · ¹ : ii: .t ..τ. zvivc) i " massive, to arrange the axis of the suspension dos Behältc-rs on a console, which is mounted on a slide, which is ^{executed with an in the form of a drive for the occupancy of the slide in lease to the Schv. 1} ice part Means for moving the shaping device to the welding part is provided with the copying element.

Such a design of the device allows OG to set conditions for; Kolr.on 'i <; r' öburfläciio due part through the axis of the suspension of the container and the JO to create a shaping facility, something to keep it constant preset pressure values of the white powder head to different * those sections lo'ngs d ^ -r Cciivjeisfjfuge in the welding process not if; is.

Zwecimiu-iLig itit, to arrange the axis of the suspension on the container relative to the means for feeding and pressing the.) IJchwoicGpulvorc an cUiü Lcavvoirjctoil v ^ zr-etzt zo that the container suspended on this axis represents a two-armed lever, on one arm the means for supplying and pressing the welding powder

attached to the welding part and its other arm with it is connected to the means for rotating the container about the axis of the suspension.

A / er such a constructive solution allows a To develop a compact device that is highly sensitive to changes in the surface profile of the welded part owns.

The means for rotating the container is advantageous around the axis of the suspension in the form of an on the container and to carry out the power drive linked to the slide.

Such an embodiment of the means for rotating the container about the axis of the suspension allows the regulation of the value de3 on the welded part by the ilittel for feeding and pressing the welding powder to simplify the given pressure in the welding zone.

. <^ Χ is preferable to arrange the suspension of the container on a suitable for the movement of the apparatus in the welding direction driven carriage. , // ¹ Ur the welding of longitudinal seams on fixed parts ^ "-

The invention is hereinafter referred to by JJuachraibuag one . Embodiment based on the enclosed Drawing explained in more detail in which an inventive Device for overhead SAW welding in longitudinal section is shown echematically.

Device for overhead SAW welding

contains, a container 1 with welding powder A. In the container 1 means for supplying and pressing the welding powder 2 onto the welding part 3 are accommodated. The means for supplying and pressing the welding powder 2 include a shell-shaped housing 4 which is open in the direction of the welding parts 5. ^{The fringe 4 is connected to its drive 1} ^ via bevel gears y, ü with its drive 1 ^ and an, housed within domeina screw 6, with a supply nozzle 5.

The supply of welding powder to the welding joint from the

ßAD

Folder 1 happens as follows.

At Hotutiori the screw 6 through the drive 9

The welding powder 2 is fed through the lower part of the feed port 5 executed openings 10 over the feed pipe 5 promoted into the shell-shaped housing 4.

The housing 4 is ißpulyerkissens to create a Schweisspulyerkissens and provided for exerting a local pressure therethrough on a section which runs along the weld joint lies in front of the arc relative to the finished seam 11. The container 1 is equipped with a welding head 12 with a mouthpiece IJ for feeding a consumable electrode 14 of, for example, a wire electrode coil 15 with A feed mechanism 16 is provided. The mouthpiece 13 is mounted in the container 1 so that it is through the shell-shaped housing 4 goes through it, while its in the Inside of the shell-shaped housing 4 protruding end relative to dam feedings does ζ · :; η 5 is arranged in a network.

Such a displacement of the mouthpiece 13 relative to the Zufuhrungsstutzenη 5 is due to the fact that in the supply zone of the welding flux from the container in the shawl-shaped housing 4 an uneven distribution the pressure of the welding powder 2 on the welding part 3 takes place while to ensure the stability of the welding parameters a uniform distribution of the pressure of the welding powder in the burning zone of the arc near the electrode 14 2 must prevail. Such an even pressure distribution is achieved in that the welding flux pad to the welding part 3 with a constant predetermined Pressure is pressed, and the even distribution of this Pressure across the welding zone causes frictional forces the welded parts3 3 * Jnd relative to the welding device.

Iliorbol falls dur uberuchusuiga, on the Schwoiüvoryang Non-parting welding powder over the stale housing 4 and falls into the container in free fall This causes the welding powder 2 to circulate between the container 1 and the welding point ensured and the economic effectiveness of the welding process increased.

"* ■■■ ·

BAD ORIGSNAL

Near the mouthpiece 13 is some distance away from the electrode 14 in the 3Chalenförruigen housing small shaping device 17 is mounted.

The shaped device 17 represents a plate, which is made of a thermally conductive material and a surface profile that coincides with the welding flux pad and the welding part cooperates, so that the generation the necessary pressure values in the welding zone and the Formation of the finished seam 11 can be guaranteed. This plate 17 can be cooled, for example by water or air.

The shaping Device 17 executed in the form of an iOrmschohs and for direct contact with the trainees Seam can be trained appropriately, thereby improving the surface quality the finished weld 11 is improved.

According to the invention, the container 1 is hinged to the suspension with the possibility of rotation about the axis ltf of the suspension. The Achaa lü der Aufhan ^ im. ^ Doo Behnltuea I can both aiii Buiialter L aelbst, also attached to the uchulun-shaped housing 4 and should be arranged offset relative to the electrode 14 in the direction of the finished weld 11.

The axis 18 of the suspension of the container 1 is intended to cause a pendulum movement of the container 1 in the plane of the weld enable.

On the axis 18 of the suspension of the container 1 is the

shaping device 17 mounted, which auoh the Possibility of a pendulum movement in the plane of the welding joint and is thus relative to the surface of the welded part 3 can adjust yourself.

On the axis of the suspension of the 3 container 1 i3t wide · -] a copier element 19 is arranged, for example in the form of a copier roller can be executed.

The copying element 19 is to ensure a constant Distance between the surface of the welding part 3 and the axis 18 of the suspension of the container 1 is provided.

BATH ORIGINAL g?

Such a keeping of said distances α constant 1st for the stabilization of the values by the welding flux pad exerted on the surface of the welding part 3 Pressures necessary to stabilize all Parameters of overhead arc welding leads.

In order to secure the necessary pressure values of the powder cushion on the welding part 3, the device is provided with means for. Rotating the container 1 to the A cha θ la of the hünt; non-circularly provided with means for pressing the shaping device 17 with the copying element 19 onto the welding part 3.

The axis 18 of the suspension of the container 1 is mounted on a bracket 20 which is arranged on a slide 21. The carriage 21 is designed for a movement in the direction to the welding portion 3 ⁿ ki and arranged for this purpose on respective guides, which are formed for example in the form of a Füiirungsstange 22nd Here, the carriage 21 is provided with a means for pressing the shaping device 1? provided with the copying element 19 on the welded part 3, which is in the form of a / drive 23 (e.g.

a compressed air or hydraulic cylinder) for the movement of the carriage 21 is carried out in the direction of the welding part 3 is.

It is expedient to position the axis 1 a of the suspension on the container 1 (or on the shaft-shaped housing 4, which is uniformly designed with the container 1) with an offset relative to the means for supplying and pressing the welding powder 2 against the weld 3 attach that the suspended on this axis 18 container 1 is a two-armed lever. In this case, the means for feeding and pressing the welding powder 2 onto the welding part 3 is preferably to be arranged on one arm of this lever (belonging to wöl ohom the elements mentioned above).

In this case it is useful to connect the other arm of this two-armed lever 3 with the means for rotating the container 1 to connect the axis 18 of the suspension.

The means for rotating the container 1 about the axis 18 of the suspension is in the form of one with the container 1 and the Slide 21 articulated drive 24

BADORiGINAL

for example a compressed air or hydraulic cylinder).

The / ^ - drive 24 can also be any other constructive Have execution. For example, he can be in the form by suspension means or a weight attached to the container 1.

Such a design of the container 1 (in 5 ¹ OrHi a two-armed lever) makes it possible to create a highly sensitive system which reacts to a change in the surface profile of the welding part 3 and automatically keeps the necessary predetermined pressure values in the welding zone constant.

For a possible movement of the device in the direction of light is it provided with a drive carriage 25, the guide rod 22 for moving the slide 21 rigidly attached and the drive 23 for moving the

Slide 21 is articulated.

Such a drive carriage 25 of the device serves to move along the Schweißt'u ^ e animal drive carriage 25 is to move the gesaraten device along the pivot ISSF U;, e Vov $ cvahQn, wi>; j doo öTtarcu when ochweißexi of Schwär weudbartm FlaciiLtülen, especially when performing overhead welding work, is required
The advantages of the device described are particularly evident when performing overhead lap seams.

The described device for overhead submerged arc welding works as follows.
"30 Before the welding process, container 1

Welding powder 2 poured. The composition of the for the overhead welding used welding powder 2 is in essentially based on the material of the welded egg, the geometric shape of the joint and the welding parameters.

The welding powder used consists of the following components: uiii ^ ium, lAuii ^ nxi, F: ioaphor _T sulfur and other filler metals ^ zuaammür ^ that a

BATH

stable arc burning, the squinting of the material of the welding partQ3, a protection deo ßweldbädes and;: ut, e formation of the finished seam secure.

At the beginning of the welding organges the device guided under the welding part 3. Two cases are possible here. When welding straight, long-dimension joints in large parts the device is in the cone along the Sciiweiß-Tuge moves, while when welding rotatable constructions the device is stationary and the part about its own axis rotates so that the welding joint is in the K electrode zone is located.

After standing the device under the welding part 3 When it comes, the drive 23 of the slide 21 that is set to weld the part in question switched on, which by means of the on the guide rod 22 mounted slide 22, the console 20 and the axis 18 of the suspension, the shaping device 17 to the welded part 3 presses. This presence should be given ο α Einc I— tung 1? takes until the copier element 19 (for example a copy roller) has touched the outer surface of the weldment a. ·

! Then the drive 24 of the container 1 is actuated, the

\ also on the welding of part 3

\ is set and connected to container 1 via a joint

w irks.

Here, daa schalonföriaigo housing 4 by rotation about the axis 18 of the suspension of the container era 1 on the outer surface of the welding part 3 pressed on.

The drive 9 is switched on and the screw 6 is set in rotation via the bevel gears 7, 8. As a result of the rotation of the screw 6, the welding powder 6 is ungs through the openings 10 via the supply? support η 5 in the shell-shaped housing 4 ^ Q requires. Here, aaa dom nohftlcm-1'οΊ. ·! Η1ββη housing 4 guided welding means 2 acts on the surface of the welding joint, and a welding flux cushion is formed.

Then the drive 27 of the carriage 25 is actuated (what is the pail when welding longitudinal welds, while when welding ßundaohweißfugen the drive 27

is not actuated, a rotating device in its place for the part that is not shown in the accompanying drawing). In the further the electrode 14 a voltage supplied, 'it is supplied to the un; j, a mechanism 16 of the welding head 12 is switched on, which connects the electrode 14 from the coil 15 via the mouthpiece 13 to the Weld joint. The joint is welded. I £ s forms a finished weld 11 is made. ■.

The attached drawing shows a variant of a circular welding joint with a fixed welding device

and a rotating part.

When the part is rotated, the copying element 19 cooperates the surface of the welded part together. When there is a change the surface shape of the welding part 3 follow da3 Copier 19 of the shape of the welded part 3 and we let

depending on the change in shape on the console 20, at the same time the position of the shaping device 17 relative is specified for the surface of the welding part 3. The / drive 23 of the carriage 21 ensures an equal- '

permanent pressing of the copying element 19 and the forwarding Device 17 to the surface do3 welding fceiles 3.

Dig arrangement of the continuous imaging iiiut ichtun £ 17 aui "of the axis of suspension of the container allows Fol _r re: i along eggs surfaces of the welding part 3 by this, while the arrangement thereof on the same Achsa with the print element 19 for a constant distance between the shaping Device 17 and the surface of the welding part 3. Daduroh will keep the vcr-

^ O given pressure values on the sections of the joint in the Welding zone guaranteed. A variant is possible here, in the case of a welding powder layer between the shaping device 17 and the surface of the weld joint during welding 2 is found, whereupon the pressure on the L'clr.veiiifuge is exercised through this layer. Such a vow is mainly used in the creation of overhead root sutures necessary.

It is also a variant of the execution of the welding

BADORiGlNAL j§]

work possible through the device according to the invention, In the case of the between the shaping device 17 and the surface of the weld joint there is no black powder is handen and the shaping device 17 with the Welded joint contacted directly, whereby on 'this the required predetermined pressure is applied. In such a contact of the shaping device 17 with the Weld joint is creating a flawless surface the finished seam 11 allows. 'In this case it results a finished seam 11 with precisely specified geometric Measurements, it shows stupid transitions from the Seam 11 to the base material of the welding part 3, a good one external condition and a flawless surface.

Such a welded version is usually used in Welding lap seams used in this IPaIl kainer Require follow-up treatment.

A variant of the welding version is also possible, in which the shaping device 17 with the welding

* sutures contacted immediately while the contact is shaping Device 17 with the surface of the weld part

! les 3 is realized through a welding flux layer, j This is an embodiment of the welding work

is usually used in the creation of cap sutures over the head

j applied to parts, the deviations in the characteristic values

and parameters for the weld joint connection (for example ~ wise raised edge overhangs, a large gap, etc.) as well as local changes in the surface shape of the weld joint (e.g. waviness, crevices, dents, etc.) exhibit.

The arrangement of the shaping device 17 and the copying element 19 on the axis 18 of the suspension of the container 1 and the possibility of a separate .Regulation of the pressing force of the shaping device 17 and the Schweliipulverk iofjerif) on da ;. ¹ iichwe Iliteil 3 > /, αυ tot Lon on aliio, jj ^> don to automate the welding process and practically exclude the intervention of the machine operator in this. This creates conditions for the creation of perfect weld seams, especially overhead lap seams.

* BATH ORIGINAL A

Claims (4)

RATENIfANWALT DipL-Phys ^: Ö1ÖHÄRD LUYKEN Institut elektroavarki imeni iä.O. Patona Akademii Mauk Ukrainskoi SSR, Ki 92 245 - M - 61 17. ü. V.W4 VOBRICHiOUHG ZlBI 1. Device for practicing; rI: opf ~ UP-Sch.-v.eis £ .en, the one with a Cchvjoicckopf (72) with an i / .unri piece ( Vj) i'iir a BeIb st ve 2 ¹ Z Ehrend ο iil ^ ktrodo (4 ^c 'r) and with means for supplying and pressing the welding powder (2) against the welding part 0) in the zone of the mouthpiece (-73) provided container QI) for the welding powder (2) and in the zone of the mouthpiece (- / ^) arranged, arranged lOrm ^ level device (^ 7), characterized by the fact that the container (sf) can be rotated on a suspension around the A before ο (: - 'o) the Auihä'ngunc is articulated, and on this Achce QfS) also the shaping device (- ^ 7) and a Kopierelcment QiS) are arranged, and in that the device with means for lirehen the container Qi) the Λ case (- / 8) der Aufha'n ^ unc; and with a little pressure on the form ;; (77) with doia Kopiorelemcnt (<9) an dos i.tecr.veicct; eil (^) V '.> Rcdion irt 2. VorT'irhbuu / ·; nficii on «f ^ i-ncli 'I ₁ d η d π r · ch 1 ·; t kcnnaoic h χι ο t, d .-. u; i; the; Ac; ico (7d) dux Aiir.iin tion of the container Qi) is arranged on a console (20) which is nonöioi-t on a carriage (21) which is connected to an in iorm of a ^ -drive (23) for the movement of the carriage (21) in BATH ORIGINAL Direction to the welding part (3) executed means for pressing the shaping device (1?) With the. ^. Copier element (19) bh the welding part (3) is provided. 3. Apparatus according to claim 1 or 2, daduroh c characterized in that the axis (18) of the suspension on the container (1) is relative to the means for the supply and the Andrüoken of the welding powder (2) on the welding part (3) is arranged offset so that the on this axis (18) suspended container (i) a two- ^ q represents armed lever, on one arm of which the means for feeding and pressing the welding powder (2) onto the welding part (3) and its other arm is connected to the means for rotating the container (1) around the axis (lö) of the suspension » 4. Apparatus according to claim 3 »characterized in that that the means for rotating the container (1) about the axis (18) of the suspension in the form of a on the container (1) and the carriage (21) articulated power drive (24) is carried out. ι 20 5 · Device according to any of the preceding Claims - characterized by that the suspension of the container (1) on a drive carriage (25) suitable for this movement in the welding direction is arranged. EPO COPY