CS250031B1 - 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
CS250031B1
CS250031B1 CS773785A CS773785A CS250031B1 CS 250031 B1 CS250031 B1 CS 250031B1 CS 773785 A CS773785 A CS 773785A CS 773785 A CS773785 A CS 773785A CS 250031 B1 CS250031 B1 CS 250031B1
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Czechoslovakia
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welding
aluminum
sheets
welding current
weld
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CS773785A
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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 CS773785A priority Critical patent/CS250031B1/en
Publication of CS250031B1 publication Critical patent/CS250031B1/en

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Abstract

Riešenie sa týká sposobu elektrotroskového zvárania dielcov z hliníka alebo jeho zliatin, a to dielcov s rovnakým odvodom tepla z miesta zvaru, iktorý umožňuje vylúčiť vznik neprievarov a zaručuje rovnoměrný celistvý zvar velmi dobrých mechanických vlastností. Podstata riešenia spočívá v tom, že pri zváraní plných kusov so zváz,kom líšt alebo plechov privádza sa do plného kusá zvárací prúd o 15 až 40 % nižší ako zvárací prúd privádzaný do zvdzkov líšt alebo plechov.The solution concerns a method of electroslag welding of parts made of aluminum or its alloys, namely parts with the same heat dissipation from the weld, which allows to exclude the formation of gaps and guarantees a uniform, integral weld with very good mechanical properties. The essence of the solution lies in the fact that when welding solid pieces with a bundle of strips or sheets, a welding current is supplied to the solid piece that is 15 to 40% lower than the welding current supplied to the bundles of strips or sheets.

Description

Vynález sa týká spósobu elektrotroskového zvárania dielcov z hliníka alebo jeho zliatin, ktoré majú rovnaký odvod tepla z miesta zvaru najma plných kusov so zvazkom líšt alebo plechov.The present invention relates to a method for the electroslag welding of aluminum or aluminum alloy parts having the same heat dissipation from the weld site, in particular of solid pieces with a stack of strips or sheets.

Pri elektrotroskovom zváraní hliníka a hliníkových zliatin musia mať zvárané dielce v mieste zvaru přibližné rovnafcú 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 hlhoký závar a na straně druhej, kde je odvod tepla velký, je híbka závaru malá a často ostávajú neprevarené nespojené miesta.For electroslag welding of aluminum and aluminum alloys, the welded parts at the weld location must have an approximately equal thickness of the weld edges in order to have the same heat dissipation to the weld edges. If this condition is not fulfilled, on the other hand, where the heat dissipation is too deep, and on the other hand, where the heat dissipation is large, the depth of the fissure is small and often unrefitted unconnected spots remain.

V praxi sa tento rozdiel rieši tak, že u dielca, kde sa predpoklodá velký odvod tepla, sa zvarová hrana predohreje na teplotu 150 až 200 °C. Nevýhodou tohoto postupu je, že komplikuje zváranie, je energeticky náročný a predížuje čas přípravy materiálu před zváraním.In practice, this difference is solved by preheating the weld edge to a temperature of 150 to 200 ° C for a component 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.

Ďalšou jeho nevýhodou je, že nezaručuje spolehlivé spojenie pri zváraní hrubých plných kusov so zvazkom líšt alebo zvazkom plechov, čo je častý spoj pri stavbě prúdovodičových systémom, zherníc.A further disadvantage is that it does not guarantee a reliable connection when welding thick solid pieces to a stack of bars or a stack of sheets, which is a frequent connection in the construction of conductor systems, zircons.

Uvedené nevýhody sa do značnej miery odstránia spósobom elektrotroskového zvárania hliníka pódia vynálezu, ktorého podstata spočívá v tom, že zvárací prúd privádzaný do pevného kusá je o 15 až 40 % nižší ako zvárací prúd, privádzaný do zvázku líšt alebo plechov.These disadvantages are largely eliminated by the electroslag welding of aluminum according to the invention, which is characterized in that the welding current supplied to the solid piece is 15 to 40% lower than the welding current supplied to the stack of strips or sheets.

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

Ďalšou jeho výhodou je, že umožňuje vytvořit spolehlivý, dokonale prevarený zvarový spoj medzi hrubým plným kusom a zvazkom líšt alebo zvazkom plechov.Another advantage is that it makes it possible to create a reliable, perfectly welded weld joint between a thick solid piece and a stack of bars or a stack of sheets.

Zo zdroja zváracieho prúdu sa připojí jeden pól na elektrodu a druhý pól sa dvomi róznymi prívodmi připojí na obidve zvárané kusy. Pri zváraní 100 mm hruběj došky z čistého hliníka so zvazkom 5 ks 20 mm hrubých dosiefc, sa na plnú došku priviedol zvárací prúd o intenzitě 2 000 A a ,na stranu zvazku dosiek prúd o intenzitě 3 000 A. Rozdielna velkost prúdov sa dá dosiahnuť použitím dvoch prívodných káblov a připojených zariadení, majúcich rozny ohmický odpor alebo zariadením tlmivky do jedného z prívodov.From the welding current source one pole is connected to the electrode and the other pole is connected to the two pieces to be welded with two different leads. When welding 100 mm thick pure aluminum sheet with a bundle of 5 pieces of 20 mm thick plates, a welding current of 2,000 A was fed to the full thatch, and a current of 3,000 A was applied to the side of the stack. two power cords and connected devices having different ohmic resistance or a choke device to one of the inlets.

Zvarové spoje, vyhotovené sposobom podlá vynálezu, preukázali velmi dobré mechanické vlastnosti a vo všetkých prípadoch vyhověli prevádzkovým požiadavkám.Welded joints according to the invention have shown very good mechanical properties and in all cases complied with operational requirements.

Claims (1)

PREDMETSUBJECT Spósob elektrotroskového zvárania dielcov z hliníka alebo jeho zliatin, ktoré majú rovnaký odvod tepla z miesta zvaru, najma plných kusov so zvazkom líšt alebo plechov, keď jeden pól zváracieho prúdu sa připojí na zváraciu elektrodu a druhý pól sa pripojí dvomi prívodmi na obidva zvárané kusy, vyznačujúci sa tým, že zvárací prúd privádzaný do pevného kusá je o 15 až 40 % nižší ako zvárací prúd privádzaný do zvázku líšt alebo plechov.A method of electroslag welding of aluminum or aluminum alloy parts having the same heat dissipation from the weld site, in particular solid pieces with a stack of bars or sheets, when one pole of the welding current is connected to the welding electrode and the other pole is connected by two leads to both welded pieces. characterized in that the welding current supplied to the fixed piece is 15 to 40% lower than the welding current supplied to the stack of strips or sheets.
CS773785A 1984-11-26 1984-11-26 The method of electroslag welding of aluminum or its alloys CS250031B1 (en)

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CS773785A CS250031B1 (en) 1984-11-26 1984-11-26 The method of electroslag welding of aluminum or its alloys

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CS773785A CS250031B1 (en) 1984-11-26 1984-11-26 The method of electroslag welding of aluminum or its alloys

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CS250031B1 true CS250031B1 (en) 1987-04-16

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