CS249892B1 - The method of electroslag welding of aluminum or its alloys - Google Patents

The method of electroslag welding of aluminum or its alloys Download PDF

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Publication number
CS249892B1
CS249892B1 CS903384A CS903384A CS249892B1 CS 249892 B1 CS249892 B1 CS 249892B1 CS 903384 A CS903384 A CS 903384A CS 903384 A CS903384 A CS 903384A CS 249892 B1 CS249892 B1 CS 249892B1
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Czechoslovakia
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welding
aluminum
alloys
welding current
weld
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CS903384A
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Czech (cs)
Slovak (sk)
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Ladislav Vehner
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Ladislav Vehner
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Priority to CS903384A priority Critical patent/CS249892B1/en
Publication of CS249892B1 publication Critical patent/CS249892B1/en

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Abstract

Riešenie sa týká sposohu elektrotroskového zvárania dielcov z hliníka alebo jeho zliatin s nerovnakou hrubkou v mieste zvaru, ktorý umožňuje vylúčit vznik neprievarov a zaručuje rovnoměrný celistvý zvar. Podstata riešenia spočívá v tom, že na tenší kus sa privedie váčší zvárací prúd a na hrubší kus sa privedie menší zvárací prúd. Rozdielna velkost’ zváracích prúdov, privádzaných k zváraným kusom sa dá dosiahnúť použitím dvoch prívodných káblov a připojením zariadení, majúcich rozny ohmický odpor.The solution concerns a method of electroslag welding of parts made of aluminum or its alloys with unequal thickness at the weld point, which allows to exclude the formation of gaps and guarantees a uniform, continuous weld. The essence of the solution lies in the fact that a larger welding current is applied to a thinner piece and a smaller welding current is applied to a thicker piece. Different welding currents applied to the welded pieces can be achieved by using two supply cables and connecting devices having different ohmic resistance.

Description

Vynález sa týká sposobu elektrotroskového zvárania dielcov z hliníka a jeho· zliatin s nerovnakou hrúbkou v mieste zvaru alebo dielcov s nerovnakým odvodom tepla z miesta zvaru, ktorý umožňuje vylúčiť vznik neprievarov a zaručuje rovnoměrný celistvý zvar.The present invention relates to a method of electroslag welding of aluminum parts and alloys thereof with uneven thickness at the weld site or of panels with unequal heat dissipation from the weld site, which makes it possible to eliminate the formation of seams and ensure a uniform solid weld.

Pri elektrotroskovom zváraní hliníka a hliníkových zliatin musia mať zvárané dielce v mieste zvaru přibližné rovnakú hrůbku zvarových hrán, aby bol rovnaký odvod tepla do zvarových hrán. V případe, že táto podmienka nie je splněná, vznikne na straně, kde je malý odvod tepla příliš hlboký závar a na straně druhej, kde je odvod tepla velký, je hlbka závaru malá a často ostávajú neprevarené nespojené miesta. V praxi sa tento rozdiel rieši tak, že u dielca, kde sa předpokládá velký odvod tepla, sa zvarová hrana predohreje na teplotu 150 až 200 °C. Nevýhodou tohoto postupu je, že komplikuje zváranie, je energeticky náročný a predlžuje čas přípravy materiálu před zváraním. Ďalšou jeho nevýhodou je, že nezaručuje spolehlivé spojenie pri zváraní.For electroslag welding of aluminum and aluminum alloys, the welded parts at the weld location must have approximately the same thickness of the weld edges in order to have the same heat dissipation to the weld edges. If this condition is not met, a low heat dissipation occurs on the side where the heat dissipation is too deep, and on the other hand where heat dissipation is high, the heat dissipation depth is small and often unrefitted unconnected areas remain. In practice, this difference is solved by preheating the weld edge to a temperature of 150 to 200 ° C for a part where high heat dissipation is expected. The disadvantage of this process is that it complicates welding, is energy intensive and increases the preparation time of the material before welding. Another disadvantage is that it does not guarantee a reliable welding connection.

Uvedené nevýhody sa do značnej miery odstránia sposobom elektrotroskového zvárania hliníka pódia vynálezu, ktorého podstata spočívá v tom, že na tenší kus sa privedie vačší zvárací prúd a na hrubší kus sa privedie menší zvárací prúd.The above-mentioned disadvantages are largely eliminated by the method of electroslag welding of aluminum according to the invention, which is based on the fact that a larger welding current is applied to a thinner piece and a smaller welding current is applied to a thicker piece.

Sposob podlá vynálezu umožňuje zvárať dielce z hliníka alebo jeho zliatin, ktoré majú nerovnakú hrůbku zvarových hrán bez použitia predohrevu alebo iných doplňkových opatření.The method according to the invention makes it possible to weld parts of aluminum or its alloys having an uneven depth of weld edges without using preheating or other additional measures.

Zo zdroja zváracieho prúdu sa připojí jeden pól na elektrodu a druhý pól sa dvomi roznymi prívodmi připojí na obidva zvárané kusy. Protože hrubka h2 jedného- zo zváraných kusov je vačšia ako hrúbka hi, musí byť intenzita zváracieho prúdu I, privádzaného ku zváraným kusom v opačnom pomere, číže musí byť splněný vztah _ h2 _ 2 000 _ 65 hi 3 000 “ 100One pole is connected from the welding current source to the electrode and the other pole is connected to the two pieces to be welded by two different leads. Since the thickness h2 of one of the pieces to be welded is greater than the thickness hi, the intensity of the welding current I fed to the pieces to be welded must be in the opposite ratio, so that the relation _ h2 _ 2 000 _ 65 hi 3 000 '100

Konkrétným príkladom takéhoto zvárania je spoj 100 mm hruběj došky z čistého hliníka s doskou z toho istéiho materiálu o hrúbke 65 mm, kde na straně menšej hrůbky bol přivedený zvárací prúd o intenzito 3 000 A a na straně hrubšej došky prúd v intenzitě 2 000 A. Týmto zapojením sa dosiahne rovnaký závar do obidvoch dosiek.A specific example of such welding is to join a 100 mm thick pure aluminum sheet with a 65 mm thick sheet of the same material, where a 3000 A welding current was applied to the smaller depth side and a 2000 A current on the thicker side. This connection results in the same gutter in both plates.

Rozdielna velkost zváracích prúdov, privádzaných ku zváraným kusom sa dá dosiahnuť použitím dvoch prívodných káblov a připojených zariadení, majácích rozny ohmický odpor alebo zariadením tlmivky do jedného z prívodov.The different size of the welding currents supplied to the pieces to be welded can be achieved by using two lead wires and connected devices having different ohmic resistance or by means of a choke to one of the leads.

Zvarové spoje, vyhotovené spósobom pódia vynálezu preukázali vel'mi dobré mechanické vlastnosti a vo všetkých prípadoch vyhověli prevádzkovým požiadavkám.The welded joints according to the invention have shown very good mechanical properties and in all cases complied with the operational requirements.

Claims (1)

PREDMET Sposob elektrotroskového zvárania hliníka alebo jeho zliatin, kde zvárané kusy majú nerovnakú hrůbku zvarových hrán, alebo keď jeden pól zváracieho prúdu sa připojí na zváraciu elektrodu a druhý pól sa pripo- jí dvomi prívodmi na obidva zvárané kusy, vyznačujúci sa tým, že na tenší kus sa privedie váčší zvárací prúd a na hrubší kus sa privedie menší zvárací prúd.PREDMET A method of electroslag welding of aluminum or its alloys, where the welded pieces have an uneven edge of the weld edges, or when one pole of the welding current is connected to the welding electrode and the other pole is connected to the two welded pieces by two inlets. the piece is brought in a larger welding current and a smaller welding current is applied to the thicker piece.
CS903384A 1984-11-26 1984-11-26 The method of electroslag welding of aluminum or its alloys CS249892B1 (en)

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CS903384A CS249892B1 (en) 1984-11-26 1984-11-26 The method of electroslag welding of aluminum or its alloys

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CS903384A CS249892B1 (en) 1984-11-26 1984-11-26 The method of electroslag welding of aluminum or its alloys

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CS249892B1 true CS249892B1 (en) 1987-04-16

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