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WO1998000265A9 - Procede de soudage a fente etroite par soudage a l'arc mag - Google Patents

Procede de soudage a fente etroite par soudage a l'arc mag

Info

Publication number
WO1998000265A9
WO1998000265A9 PCT/DE1997/001195 DE9701195W WO9800265A9 WO 1998000265 A9 WO1998000265 A9 WO 1998000265A9 DE 9701195 W DE9701195 W DE 9701195W WO 9800265 A9 WO9800265 A9 WO 9800265A9
Authority
WO
WIPO (PCT)
Prior art keywords
welding
wire
rlb
wire electrode
arc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DE1997/001195
Other languages
German (de)
English (en)
Other versions
WO1998000265A1 (fr
Filing date
Publication date
Priority claimed from DE1996126631 external-priority patent/DE19626631C1/de
Application filed filed Critical
Publication of WO1998000265A1 publication Critical patent/WO1998000265A1/fr
Publication of WO1998000265A9 publication Critical patent/WO1998000265A9/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Definitions

  • the invention relates to a method for narrow gap welding with the MAG welding method in which the welding device is guided in the weld joint while at least one guided by a contact tube melting wire electrode is supplied under protective gas at a predetermined wire feed speed to the welding area, and in which the parameters welding current, Elektrodendrah Feed and contact tube distance can be adjusted so that forms a rotating arc at the end of the wire electrode.
  • MAG welding is one of the most widely used arc fusion welding processes due to its versatility, good mechanizability and high productivity.
  • the economy of this known method can be further improved if the required joint cross-section is reduced and passed over to narrow-gap welding.
  • introducing the welder into the joint and positioning the consumable wire electrode to the workpiece flanks to be joined presents problems.
  • the risk of binding errors on the workpiece flanks is thereby relatively high, in particular in the case of flame-cut workpiece flanks and the resulting large gap tolerances.
  • the bridgeable weld joint width is limited, so that there is a risk of Flankenbinde toleraten at production-related larger gap widths.
  • the invention has for its object to provide a method for narrow gap welding with the MAG welding method, in which even with larger gap widths and especially in production-related gap tolerances safe edge detection can be guaranteed.
  • the self-rotation of the arc is particularly advantageous to superimpose the self-rotation of the arc on a dynamic deflection of the end of the wire electrode.
  • the self-rotation of the arc can be superimposed on a pendulum movement of the end of the wire electrode.
  • a rotational movement of the end of the wire electrode is superposed according to claim 5 of the self-rotation of the arc.
  • the overlapping of both rotations results here in an additional stabilization of the rotating arc. Occasional reversals of rotation, such as occur during welding without mechanical rotation, are barely observed here. Due to the superimposition of the two rotations, the power can even be significantly reduced compared to welding without mechanical rotation, without jeopardizing the stability of the self-rotation.
  • the combination of both rotations thus enables the application of narrow neck welding after the MAG welding process, even for heat-sensitive materials.
  • FIG. 2 shows the narrow gap welding with two mechanically deflected wire electrodes and an additional self-rotation of the arc forming at the end of the wire electrodes
  • FIG. 4 shows the narrow gap welding with a mechanically deflected, reciprocating wire electrode and an additional self-rotation of the arc forming at the end of the wire electrode
  • FIG. 5 shows the narrow gap welding with two twisted wire electrodes and an additional self-rotation of the arc forming at the end of the wire electrodes
  • FIG. 6 shows the narrow gap welding with a wire electrode plastically deformed into a helix and an additional internal rotation of the arc forming at the end of the wire electrode
  • FIG Figure 7 shows the narrow gap welding according to the variant shown in Figure 6 in detail.
  • FIGS. 1 to 6 show a highly simplified schematic representation of different variants of narrow gap welding using the MAG welding method.
  • two thick sheets BL are to be welded together.
  • a base plate GB is arranged below the welding gap SF formed between the two sheets BL .
  • the consumable wire electrodes DE are supplied to the welding region through a contact tube KR under protective gas.
  • electrode wire feed and contact tube distance is formed at each end of a wire electrode DE a rotating arc RLB.
  • Under contact pipe distance is understood to mean the distance between the lower end of the contact tube KR and the uppermost weld bead.
  • the nature of the protective gas and the diameter of the wire electrode DE may be mentioned.
  • FIGS. 1 and 2 show two static process principles in which two wire electrodes DE are fed in each case.
  • the two wire electrode DE are fed into 'the welding gap SF consecutively arranged contact tubes KR two, the wire electrode DE are curved by plastic deformation of the workpiece flanks out.
  • the ends of the wire electrodes DE are mechanically deflected by appropriately bent contact tubes KR to the workpiece edges.
  • FIGS. 3 to 6 show various dynamic process principles.
  • the desired alternating formation of the rotating electric arc RLB on both workpiece flanks is made possible by a reciprocating pendulum movement P.
  • this effect is made possible by a bent contact tube KR, which is also reciprocated in the direction of rotation DR.
  • Figure 5 shows a variant with two twisted, guided by a common contact tube KR wire electrode DE.
  • the self-rotation of the arc RLB is superimposed by a rotational movement of the ends of the wire electrodes DE caused by the melting process.
  • FIG. 6 shows a variant in which the rotational movement R of the end of the wire electrode DE is superimposed on the intrinsic rotation of the arc RLB.
  • the wire electrode DE is plastically deformed into a helix and guided in this helical shape through the contact tube KR.
  • the mechanical rotation R then results during melting of the end of the wire electrode DE.
  • FIG. 7 shows the variant according to FIG. 6 in detail.
  • the plastic deformation of the wire electrode DE into a helix takes place through a rotating wire set RD, which has three deflection rollers UR.
  • the plane plastic deformation of the wire electrode DE supplied by the three deflection rollers UR becomes a spatial helical form due to the superimposed rotation RO of the entire set of wire straighteners RD.
  • the welding device In addition to the rotating wire straightener RD, the welding device, designated overall by SE, comprises a protective gas nozzle SGD in which the contact tube KR is arranged concentrically.
  • Diameter of the wire electrode 1, 0 mm

Abstract

L'invention concerne un procédé de soudage à fente étroite selon lequel le dispositif de soudage (SE) est guidé dans la rainure de soudage et au moins un fil-électrode (DE) à fusion, guidé à travers un tube de contact (KR) est acheminé jusqu'à la zone de soudage sous apport de gaz protecteur à une vitesse d'avancement dudit fil-électrode (DVG) prédéfinie. L'obtention d'une bonne qualité de la soudure passe par la formation d'un arc électrique (RLB) passant en alternance d'un flanc de la pièce à l'autre, qui est produit entre le fil-électrode (DE) et la pièce. Jusqu'à présent, on y parvenait par déviation mécanique du fil-électrode (DE) ou par autorotation de l'arc électrique (RLB) intervenant sous condition que des paramètres de soudage déterminés soient réunis. Ces deux possibilités sont cependant limitées en termes de largeur pontable des rainures de soudage. Afin de pouvoir ponter des largeurs plus importantes de rainures de soudage, inhérentes à la fabrication, il est prévu selon l'invention de superposer à l'autorotation de l'arc électrique (RLB), une déviation mécanique de l'extrémité du fil-électrode (DE), notamment un mouvement de rotation mécanique (RO) de l'extrémité du fil-électrode (DE). Curieusement, on obtient une autorotation stable de l'arc électrique (RLB), en dépit des modifications constantes de position du fil-électrode (DE).
PCT/DE1997/001195 1996-07-02 1997-06-12 Procede de soudage a fente etroite par soudage a l'arc mag Ceased WO1998000265A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19626631.9 1996-07-02
DE1996126631 DE19626631C1 (de) 1996-07-02 1996-07-02 Verfahren zum Engspaltschweißen mit dem MAG-Schweißverfahren

Publications (2)

Publication Number Publication Date
WO1998000265A1 WO1998000265A1 (fr) 1998-01-08
WO1998000265A9 true WO1998000265A9 (fr) 1998-03-26

Family

ID=7798722

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/001195 Ceased WO1998000265A1 (fr) 1996-07-02 1997-06-12 Procede de soudage a fente etroite par soudage a l'arc mag

Country Status (2)

Country Link
DE (1) DE19626631C1 (fr)
WO (1) WO1998000265A1 (fr)

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
DE102005037360A1 (de) * 2005-08-08 2007-02-15 Siemens Ag Unterpulver-Engspalt-Schweißverfahren mit pendelnder Elektrode
CN101564788B (zh) * 2008-04-23 2012-10-24 深圳市瑞凌实业股份有限公司 使枪夹停于摆动范围中间位置的方法和焊枪夹摆动装置
DE102010041458A1 (de) * 2010-09-27 2012-03-29 Siemens Aktiengesellschaft Verfahren zum Verschweißen von Rotorwellen und/oder Rotorwellensegmenten (Scheiben) im Turbinen- und Generatorbau
CN102294563B (zh) * 2011-07-26 2013-12-04 深圳市瑞凌实业股份有限公司 可“u”字形摆动的摆动器
CN102632323A (zh) * 2012-05-11 2012-08-15 重庆昆瑜锂业有限公司 窄间隙焊接方法
CN104191154A (zh) * 2014-07-25 2014-12-10 南京梅山冶金发展有限公司 针对Boomer系列掘进台车推进补偿拐臂断裂的修复方法
CN108637430B (zh) * 2018-05-18 2020-06-05 山东交通学院 异种金属摆动电弧窄间隙多层多道非对称电流焊接方法
CN112894073B (zh) * 2020-12-23 2022-09-27 苏州弧瀚科技有限公司 一种利用旋转电极复合旋转电弧的窄间隙焊接方法
CN113523503B (zh) * 2021-07-21 2022-05-17 广东省科学院中乌焊接研究所 一种弯曲焊丝旋摆电弧窄间隙焊接装置及其方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4206105A1 (de) * 1992-02-27 1993-09-02 Linde Ag Engspaltschweissen nach dem mag-lichtbogenschweissverfahren

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