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WO1998000265A1 - 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 Download PDF

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Publication number
WO1998000265A1
WO1998000265A1 PCT/DE1997/001195 DE9701195W WO9800265A1 WO 1998000265 A1 WO1998000265 A1 WO 1998000265A1 DE 9701195 W DE9701195 W DE 9701195W WO 9800265 A1 WO9800265 A1 WO 9800265A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
wire electrode
rotation
arc
wire
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
WO1998000265A9 (fr
Inventor
Gert Kupetz
Karl-Heinz Gunzelmann
Wolfgang Schlenk
Dieter Steinbichler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
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

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts
    • B23K9/0213—Narrow gap welding

Definitions

  • the invention relates to a method for narrow gap welding using the MAG welding method, in which the welding device is guided in the weld joint and at least one melting wire electrode passed through a contact tube is supplied to the welding area under protective gas at a predetermined wire feed rate, and in which the parameters welding current, electrode wire -Adjust the feed and contact tube distance such that a rotating arc forms at the end of the wire electrode.
  • MAG welding is one of the most common 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 the narrow gap welding is started.
  • the introduction of the welding device into the joint and the positioning of the melting wire electrode to the workpiece flanks to be connected are problematic.
  • the risk of binding errors on the workpiece flanks is relatively high, especially with flame-cut workpiece flanks and the resulting large gap tolerances.
  • EP-A-0 557 757 discloses a method for narrow-gap welding of the type mentioned at the outset, in which the parameters welding current, electrode wire feed and contact tube spacing are set in such a way that the usual axial material transfer is performed by a rotating one without a mechanically effected electrode movement Material transfer is replaced with a rotating arc.
  • the bridging gap width is limited, so that there is a risk of flank binding errors in the case of larger gap widths due to production.
  • the invention has for its object to provide a method for narrow gap welding with the MAG welding method, in which a reliable edge detection can be ensured even with larger gap widths and in particular with gap tolerances due to production.
  • This object is achieved according to the invention in a generic method for narrow gap welding in that the self-rotation of the arc is superimposed on a mechanical deflection of the end of the wire electrode. It is surprising for the person skilled in the art that, despite the mechanical deflection of the end of the wire electrode and the consequent constant change in position of the electrode end, an arc can be formed with stable self-rotation. The superimposition of the mechanical deflection and the self-rotation of the arc leads to a wider arc area, which ensures the desired and necessary melting of both workpiece flanks with certainty even with larger joint widths.
  • a rotational movement of the end of the wire electrode is superimposed on the self-rotation of the arc.
  • the superposition of both rotations results in additional stabilization of the rotating arc. Occasional reversals of the direction of rotation, such as occur when welding without mechanical rotation, are hardly observed here.
  • the performance can be significantly reduced compared to welding without mechanical rotation, without endangering the stability of the self-rotation.
  • the combination of both rotations thus enables narrow-gap welding to be used even with heat-sensitive materials according to the MAG welding process.
  • the self-rotation of the arc and a mechanical rotation the latter is produced with little effort by winding the wire electrode. It has proven to be particularly economical to manufacture the coil by means of a rotating wire straightening set.
  • Figure 1 shows the narrow gap welding with two plastically deformed wire electrodes and an additional self-rotation of the arc forming at the end of the wire electrodes.
  • Figure 3 shows the narrow gap welding with a reciprocating wire electrode and an additional self-rotation of the arc forming at the end of the wire electrode
  • FIG. 4 shows the narrow gap welding with a mechanically deflected, oscillating wire electrode and an additional self-rotation of the arc that forms at the end of the wire electrode
  • FIG. 6 shows the narrow gap welding with a wire electrode plastically deformed into a coil and an additional internal rotation of the arc and at the end of the wire electrode
  • 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 process.
  • 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 melting wire electrodes DE are fed to the welding area through a contact tube KR under protective gas.
  • a rotating arc RLB is formed at the end of a wire electrode DE.
  • Contact tube distance is understood to mean the distance between the lower end of the contact tube KR and the uppermost welding bead.
  • the type of shielding gas and the diameter of the wire electrode DE are further parameters that can play a role in the formation of an arc RLB with stable self-rotation.
  • Figures 1 and 2 show two static process principles, in each of which two wire electrodes DE are supplied.
  • the two wire electrodes DE are supplied via two contact tubes KR arranged one behind the other in the welding gap SF, the wire electrodes DE being curved toward the workpiece flanks by a plastic deformation.
  • the ends of the wire electrodes DE are mechanically deflected toward the workpiece flanks by correspondingly bent contact tubes KR.
  • Figures 3 to 6 show different dynamic process principles.
  • the desired alternating design of the rotating arc RLB to 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.
  • FIG. 5 shows a variant with two twisted wire electrodes DE guided through a common contact tube KR.
  • the self-rotation of the arcs RLB is superimposed on a rotational movement of the ends of the wire electrodes DE caused by the melting process.
  • FIG. 6 finally shows a variant in which the self-rotation of the arc RLB is superimposed on a rotational movement R of the end of the wire electrode DE.
  • the wire electrode DE is plastically deformed into a helix and passed through the contact tube KR in this helical shape.
  • the mechanical rotation R then results when the end of the wire electrode DE is melted.
  • FIG. 7 shows the variant according to FIG. 6 in detail.
  • the plastic deformation of the wire electrode DE into a coil is carried out by a rotating wire straightening set RD which has three deflection rollers UR.
  • the plane plastic deformation of the wire electrode DE supplied with a predetermined wire feed speed DVG caused by the three deflection rollers UR becomes a spatial helix shape due to the superimposed rotation RO of the entire wire straightening set RD.
  • the welding device In addition to the rotating wire straightening set RD, the welding device, designated overall by SE, includes a protective gas nozzle SGD in which the contact tube KR is arranged concentrically.
  • Sheet thickness 200 mm gap width: 15 - 18 mm

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Arc Welding In General (AREA)

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 true WO1998000265A1 (fr) 1998-01-08
WO1998000265A9 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)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN108637430A (zh) * 2018-05-18 2018-10-12 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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
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
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0557757A1 (fr) * 1992-02-27 1993-09-01 Linde Aktiengesellschaft Soudage en fente étroite suivant le procédé de soudage à arc MAG

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0557757A1 (fr) * 1992-02-27 1993-09-01 Linde Aktiengesellschaft Soudage en fente étroite suivant le procédé de soudage à arc MAG

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ELLIS D J: "NARROW GAP WELDING OF STEEL", WELDING AND METAL FABRICATION, vol. 59, no. 3, April 1991 (1991-04-01), pages 118, 120, 124 - 125, XP000215735 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN108637430A (zh) * 2018-05-18 2018-10-12 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

Also Published As

Publication number Publication date
DE19626631C1 (de) 1997-06-12

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