DE7017101U - ELECTRIC WELDING DEVICE - Google Patents

Description

. '';. '!.; - "high welding devices, ie with resistance ·] ·. ·"'.'rate, which one with a magnet- ■ -. :: ·. . · Aj ^ v.'iron, furthermore a primary v .: '. ^: '' ; un ~, öle üurci: a ousr rnenrerc;.:. iv. ^- .cc is formed and which with the

With --Ic; .O / -: ar.nt to be considered .i jhwelding devices of this design gesc ":" i ".. eht '^; li association iunr between the secondary winding of the trancr-rmatorr; un i the.' ^: <three electrodes with the help of a circuit arranged outside the transformer and is formed by cables with a thick cross-section which, depending on shape, length, resistance, etc., increase the total resistance of the secondary circuit to a greater or lesser extent.

In order to be able to move the welding electrodes, it is necessary to that the lines connected to them can follow this movement.

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Πον / öhr.lio :. ν; - "γ ·; i '""·''. ^ tr>■'.<■τ.Ι'ζ!" r.ror on "speaking line ur.to:· Z'.ii" i '^ r. '·. r. "" ·· ino; · Μ ^ ·,: .- · ι · -, '': ι, it. '. ο ver-onriden. These strands Mr: to. ^v> -1 °, '":..'" ^:. '■ ·. Where. : <>: \\ I '■:. ■ ·; ■' ■ ^ u: ;; r-oh'ini ", ia. -ie uus copper he.-3teh.on -in ¹ rr, riiv" ii <·! <· '': · -! vnaTi.-ch ^ :: V. 'Lrkunren exposed are. Your MpC-TiV.-! ! ■ τϊ-Λ, αη'ί ν:!: -. ~,;. ·. ior Zoit rroiier, which offends the Gt-samtwidorrita ::: Ίτ .Jp><\ iii.-l: iri: r ^ lr '". Your damage increases up,.':.? nol.! · a:;, Jf::; ο: ιη · ί1 lor il <. · R.orhrunioChen loads occur, gqw.i; · .: what! Nro Λπρ] itufJo il :; also ·. Their frequency concerns.

Me Leicv .. :); ie μ. '<\ ί ·, -, · ο:.? -; rans ί) r ^ iators, which as a function of the .Tarn Jο! .Wide <iyr parts required electrical power defined woTOori can of course also respond to other conditions at. The V.'iderctü..id .: us Gekvindar circle outside the 'transformer plays such an important role that the power of the transformer can only be estimated within a very large framework; the resistance of the outer circle often takes on values which are in the Range from five to six times the resistance of the secondary winding lie. In most cases, the transformers are manufactured in series; a selection has been made over the years taken in order to obtain devices for industrial purposes within a range of standardized power »These transformers are extensive because of the required performance and are designed so that the secondary windings with external circuits great resistance.

With the help of multi-point welding devices, one tries to achieve the greatest possible number of welding points in a single pass to manufacture. However, one does occur with multipoint welding machines

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/jev.'ijso number of L'jCir. ·: iorir-ieltci: iuT; it irt in particular from Fic ^ utun; - ,, (■ '"? / i: i.Tntr: i';I> :. 'Vv so white points to achieve. Tjies require, di ^? ra: .r ^! ' :) v; ^ tr "r. ont. "harvest from the electrodes. ] -] Sometimes insurmountable difficulties arise in order to adjust the secondary '.'. 'resistance values when using different transformers which are fed simultaneously by the same power source Insufficient secondary currents are available for certain welding points. The suggestion to lengthen certain secondary circuits for the purpose of equalizing the resistance is only an emergency solution.

With the present The innovation is therefore to _{create an electric spot welding device (} one that does not have the disadvantages mentioned in devices of the known type.

The task of the present innovation has been renewed accordingly solved that the welding device has at least one pair of welding electrodes, many at the outer end of two parallel Rods are attached that the rods to their other igniter. electrically connected to each other and so in the magnetic circuit of the transformer are aligned so that they are between them with de · ":, area of the between the two electrodes to be welded Parts form the secondary circuit of the transformer.

This iConstruction has several advantages:

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You can create the secondary circuit directly with the material to be welded get in touch.

The Gsicuridärkrci

restricts, since he only carries the parts of rods which are on the outside of the transformer's magnetic circuit, as well as the corresponding part required for welding.

The outer secondary circuit has a resistance value that is essentially constant over time.

Since the dimensions of the external secondary circuit have been reduced, the power and the dimensions of the transformer can be reduced significantly in order to achieve the same result as compared to the power of devices of the known type.

This implies when using Stror. obtainable, more economical Operation of importance.

The scarf elements and line elements of the welding machine can weakly dimensioned and consequently kept low in price.

If modern welding equipment is used for multipoint welding turn, enables the reduced size of the transformer the installation of a larger number of welding devices in a single machine in the given space.

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The manufacturing or production costs for each weld are

References to benefits is ~ ras. ~ :: hv.-ei.: device so designed that3. "ar as electrode carrier ei.:jese-::th rod a by pressure medium loadable, parallel _ur rod aligned punch assigned is, and.: a.I an element of the punch connected to the housing is while the other element of the stamp with the corresponding Rod communicates.

In this way one can arrange a large number of welding devices side by side and ^{obtain very simple V, T} eise special machines for point welding, since it is very easy to group the supply lines for the transformers and for the pressure stamps :: u. In addition, the assembly and disassembly of the individual units and their maintenance can be carried out extremely quickly and easily.

The invention is explained with reference to the accompanying drawings. This shows an electrical spot welding device with two electrodes.

Fig. 1 of the drawings is a partly broken erspektivansicht ^D of the welding unit;

Fig. ?:. the drawing is another person not of the welding machine in another La; - · :;

Pig. Fig. 3 is a cross-sectional view from line III-III in Fig. Ij and

FIG. 4 of the drawings is another cross-sectional view taken from line IV-P "in FIG. 1.

The electrical spot welder shown in the drawings has two welding electrodes 1 and 2, which by means of caps 3 and 4 at the lower ends of two vertical rods 5 and 6 are attached. The rods 5 and 6 are through a housing R. carried.

The housing 8 consists essentially of the layered magnetic circuit 11 of a translator. The magnetic circuit is formed by a stack of sheet metal plates or sheet metal bodies, which are clamped between a lower flange 12 and an upper pianson 13 by means of rods 14. On the upper flange 8 there is a cover _6y to which a threaded bolt 1 " ^{7 is} attached. With the aid of the threaded bolt 17, the welding device can be attached to the holder of suitable machines.

The bending bodies representing the magnetic circuit of the transformer are rectangular in appearance. Each roof body, such as the sheet metal body shown in FIG. 3 of the drawings with reference only bucket 21, has two side parts 2? and>; in the middle part 23. This is twice the size of the bciüer; f> oitentc! .lo. ' ⁷ , where the corpses of the same position are mutually interrelated.onULorlic-ieiv! aligned along the center line 2'j. The sheet metal grains are in shape

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kleir.- · / '''S' ^ te arranged, polygamy by insulating layers 2c each - are separated from one another. The outermost bodies are from the lower iaiisch 12 and the front upper Plansch IJ- through zv. ^R ei separated in the same manner insulating layers 2S and ZS ' ¹ .

On the central part 23 of the magnetic circuit 11 of the transformer are two Primary windings 32, 33 pull before. Depending on the application? 2v; e> "': is either or both of the windings are connected to a suitable AC power source.

The secondary circuit of the transformer wire is formed by the single turn of the two rods 3 and 6; a shunt J> 6 connects the upper ends of the two rods and thus the area of the material to be welded against which the two welding electrodes 1 and 2 are placed at the same time.

In the illustrated embodiment, the shunt 3β is carried out a flexible package of copper lamellas is formed, which have the shape of a U. The ends of the U-body are by means of screws 38 and 39 on two fixed plates 41 and 42 and on the upper one, respectively Ends of the two rods 5 and 6 attached.

The two electrode carriers or rods 5 and 6 can be displaced in the longitudinal direction in a lower guide h'-j and in an upper guide 46. The two guides consist of an insulating compound and are in the lower flange 1? and bordered in the upper flange 13.

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The shifting movement of the two rods 5 and 6 happens with With the help of two double-acting punches 47 and 48, for example by applying compressed air, i. will. One of the stamp elemetites, for example the cylinder is fixed to the housing, while the other element, i.e. the piston, is fixed to the corresponding one

-angebody is connected. In the illustrated embodiment carries j ⁿ of the body of the two punches 4-7 and 48, a bolt 51, which by means of a screw 52 to the upper flange

IJ) is attached. The piston 54 is connected to a rod 55, at the outer end of which a tension plate 57 is arranged. The corresponding rod extends through this tension plate and is fastened to it by means of a screw 58. The screw 58 connects or braces the two parts of the tension plate, which are formed by a gap 59. This gap opens into the hole in the plate through which the rod extends.

"The two electrode carriers or rods 5 and 6 are cooled by a circulating medium, for example through '' isse r. For this reason they are tubular and at their ... ^ xter end they are separated by the corresponding electrodes." ¹ οϋ ^ -η, while they are provided at their upper ends with connections 62 and 6j> , iThese each carry a tube Θ \ or 65, which extend coaxially into the interior of the corresponding rod up to the lower end of the same, ie up to in the proximity of electrode 1 or 2 of the corresponding rod.

! The threaded body or connection body 62 is connected via a bellows body 66 connected to an opening 67 which is located in the cover l6

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C,

is located, and which of you are in a "": * guide :; line r cooling water is connected. The cboro area of the Rir.graunes, which between the tube 6- ^: and the wall of the rod. or whose bore is formed, stent over a flexible reveal CZ with the upper connecting body Gj> the other ;. Rod 6 in connection. The upper part of the Rin; raurnes, which is located between that inside the second otan ;; e] i ^ r.on JVVnrn u: .d. that rod itself is, d'jreh is one. v: eitore: i bellows body (not visible in the drawing r 1 *; '' i -.'.- r i: i of the Aba-ikun, '- Ib arranged opening 71 - /'.-.- bound, i ^r :. "i:" L ^r : iu "; el a ':; ■ /, - guide, which has warmed up during the' J- .. rehlau Cz \ - \ '-o"' - tf?

The style ioc J- ·:. ·. · .- ■■■ 1. ;; "iit" lr; t like folj; ti

The ^ u versuhweiSende :. Parts v: eriio: i under the electrode: ". 1 and aligned and lying, call counter electrode ^, (not shown). The beginning of a scr.weiif ^; - tos begins by supplying compressed air to the ceiden Ste ^: vil- : ö.; rn ^; -7 and 43, v.'through the two rods 3 and 6 are extended and moved downwards. At the same time, the secondary circuit of the transformer is closed. This is the phase in which the electrodes are applied.

The electrodes are applied now-.ehr under pressure to the pieces to be welded, zo Ja2 is set to the primary circuit of the transformer during a particular period of time under tension. This is: the so-called welding phase. The electrodes are held under pressure on the pieces to be welded for a certain period of time; this process corresponds

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Claims (5)

Scnutz, ", ^ Ό ruche 1. Electrical welding machine with several welding electrodes, which are electrically conductive with one or more secondary windings of a transformer, while the primary winding of the transformer is connected to one V. ^r eehselstromquelle, characterized in that the welding machine at least one pair of welding! ¹ ew: troderi (1, 2), which are each attached to the outer end of two parallel rods (5, 6) that the rods are electrically connected to each other at their other ends and are aligned in the magnetic circuit (11) of the transformer, that they form between them with the area of the parts to be welded between the two electrodes aen secondary circuit of the transformer, and that the rods (5, 6) both zurr. Primary circuit as well as each other are displaceable. 2. Welding device according to claim 1, characterized in that the magnetic circuit (11) of the transformer is the main part of the housing (8) of the welding device. - 12 - 701710112.11.70 3. Welding device according to claim 1, characterized in that each The rod (5, 6) used as the electrode carrier is associated with a punch (47, 48) aligned parallel to the rod by means of pressure means, and one element of the Stamp is connected to the casing (8), while the other Element of the stem with the corresponding rod in connection stands. 4. Welding device according to claim 2, characterized in that the Housing (8) formed by the magnetic circuit (II) of the transformer which is clamped between two flanges (12 ^ 1 "*) by means of rods (14) extending in the transverse direction. 5. Welding device according to one of claims 1 to 4, characterized in that each rod is tubular and closed at one of its ends by the electrode carried by it, while the other end of the rod is provided with a connecting body (62, 6j>) having a coaxially iii · 'the rod ere extending tube (64, 65), and <? ■' _a tube and the annular space between the tube and Innenwai ^ ¹ ^ ₃ of the rod are provided with two terminal bodies' which to run of coolant, for example water. 701710112.11.70