EP1704015A1 - Dispositif de soudage - Google Patents

Dispositif de soudage

Info

Publication number
EP1704015A1
EP1704015A1 EP04804111A EP04804111A EP1704015A1 EP 1704015 A1 EP1704015 A1 EP 1704015A1 EP 04804111 A EP04804111 A EP 04804111A EP 04804111 A EP04804111 A EP 04804111A EP 1704015 A1 EP1704015 A1 EP 1704015A1
Authority
EP
European Patent Office
Prior art keywords
welding device
servo motor
electrode carriers
linear guide
electrode
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.)
Withdrawn
Application number
EP04804111A
Other languages
German (de)
English (en)
Inventor
Gerhard Lechler
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.)
Promess Gesellschaft fur Montage- und Pruefsysteme Mbh
Original Assignee
Promess Gesellschaft fur Montage- und Pruefsysteme Mbh
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 Promess Gesellschaft fur Montage- und Pruefsysteme Mbh filed Critical Promess Gesellschaft fur Montage- und Pruefsysteme Mbh
Publication of EP1704015A1 publication Critical patent/EP1704015A1/fr
Withdrawn legal-status Critical Current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
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/30—Features relating to electrodes
    • B23K11/31—Electrode holders and actuating devices therefor
    • B23K11/314—Spot welding guns, e.g. mounted on robots
    • B23K11/315—Spot welding guns, e.g. mounted on robots with one electrode moving on a linear path

Definitions

  • the invention relates to a welding device with two electrode carriers that can be moved relative to one another by a servo motor and can be equipped with electrodes.
  • Welding devices of the above type are known, in which - as in the case of DE 101 44 731 A1 - either from both electrode carriers or - as in the case of DE " 33 27 510 C2 - at least one electrode carrier performs a scissor-shaped movement.
  • a disadvantage of the known constructions is also the fact that whenever the distance between the electrodes transferred to the welding position and the weld metal is different before the electrodes are pressed on, deformations of the weld metal cannot be ruled out, since the electrode closer to the weld metal does this The weld metal is displaced against the electrode further away from the weld metal. The distances traveled here are small in practice, but they are by no means insignificant for the perfect welding process. Presentation of the invention
  • the invention has for its object to provide a welding device of the type under consideration, in which both electrodes perform a linear movement and in the positioning errors when transferring the electrodes into the welding position are compensated for without disturbing displacements or deformations of the weld metal.
  • This object is achieved according to the invention in a welding device of the type under consideration in that it has at least one linear guide on which both electrode carriers are guided, that the electrode carriers and the servo motor form an assembly floating on the linear guide and that the assembly is carried out Means for balancing their weight is held in a basic position from which the electrode carriers can be transferred into the welding position.
  • the welding device has the advantage that, due to the linear movement of the electrode carriers, a full-area and full contact between the electrodes and the weld metal is ensured, regardless of the position and thickness of the parts to be welded.
  • the floating mounting of the parts used to carry out the welding process makes it possible to automatically transfer the electrodes into a symmetrical position with respect to the weld metal.
  • the weight compensation means preferably formed by at least one spring, hold the electrode carriers and the servomotor in a central position.
  • the device is equipped with a brake, by means of which the assembly formed by the electrode carriers and the servo motor can be locked on the linear guide during certain process phases.
  • Fig. 1 shows the essential parts of the device transferred to a welding point in its starting position
  • FIG. 2 shows the position of the parts of the welding device according to FIG. 1 in a first intermediate position
  • Fig. 3 shows the position of the parts of the welding device in a second intermediate position
  • Fig. 4 shows the position of the parts of the welding device in the welding position
  • Fig. 5 shows the position of the parts of the welding device during the return to the starting position.
  • Fig. 1 is a linear guide on which three carriages 2, 3 and 4 are floating.
  • an upper electrode carrier 6 Connected to the carriage 2 by screws 5 is an upper electrode carrier 6, which carries an electrode 7 at one end and, at its other end, encloses the spindle 8 of a screw drive driven by a servo motor 9 with a nut (not shown).
  • 10 is a coupling that connects the upper stub shaft 11 of the shaft of the servo motor 9 to the spindle 8.
  • a lower electrode carrier 12 is connected to the carriage 4 by means of screws 5, which carries an electrode 13 at one end and, at its other end, encloses a further spindle 14 of the screw drive with a nut (not shown), the spindle 14 via a coupling 15 is connected to the stub shaft 16 of the shaft of the servo motor 9.
  • the spindles 8 and 14 have opposite threads.
  • the servo motor 9 is connected to the carriage 3 by means of a cross member 17.
  • a brake is attached to the end of the cross member 17 facing away from the servo motor 9.
  • Rail 18 attached, the position of which can be locked in any position by the brake piston 19 of an electrically or pneumatically actuable brake 20.
  • the carriages 2, 3, 4 with the electrode carriers 6 and 12 and the cross member 17 together with the servo motor 9 and the spindles 8, 14 form an assembly which is floatingly supported on the linear guide 1, with a spring 21 having a characteristic curve that is as linear as possible ensures a weight balance.
  • a spring 21 having a characteristic curve that is as linear as possible ensures a weight balance.
  • pneumatic weight compensation can also be used.
  • End stops 22 and 23 are arranged at the upper and lower ends of the linear guide and, together with the clutches 10 and 15 designed as slip clutches, prevent the spindles 8 and 14 from being unscrewed from the nuts of the screw drives arranged in the electrode carriers 6, 12. Both the end stops 22, 23 and the linear guide 1 are attached to a base plate 24, via which the welding device z. B. can be connected to an industrial robot.
  • the linear guide 1 could be replaced by two parallel guides arranged at a distance from one another, between which the servo motor 9 and the spindles 8, 14 can lie. It would also be possible to arrange the screw drive between the ends of the electrode carriers 6, 12 holding the electrodes 7, 13, to mention only a few conceivable variants. In any case, it is ensured that no bending moments are introduced into the spindles of the screw drive and that the end faces 25, 26 of the electrodes 7 and 13 are aligned parallel to one another and to the weld metal.
  • the welding device When the brake 20 is applied, the welding device is transferred into the area of two sheets 27, 28 to be welded to one another, ie into the position shown in FIG. 1. As soon as it has reached the position shown in FIG. As soon as one of the electrodes 7, 8 is located in the immediate vicinity of the laminated core 27, 28, the brake 20 is released with the aid of a program control not described in more detail here and, as shown in FIG. 2, the upper electrode 7 is placed on the laminated plate 27. The servo motor 9 continues to run and "pulls" the lower electrode 13 upwards, while the upper electrode 7 is supported on the plate 27, which forms a fixed point, in other words. In other words, the asymmetrical position of the electrodes 7, 13 is automatically compensated for Sheet stack 27, 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Robotics (AREA)
  • Mechanical Engineering (AREA)
  • Resistance Welding (AREA)

Abstract

L'invention concerne un dispositif de soudage comportant des porte-électrodes (6, 12) actionnés par un servomoteur (9). Selon l'invention, le servomoteur (9) et les porte-électrodes (6, 12) forment un module logé de façon flottante sur un guide linéaire (1), ledit module étant maintenu dans sa position initiale par des éléments (21) destinés à équilibrer la masse du module.
EP04804111A 2003-12-18 2004-12-15 Dispositif de soudage Withdrawn EP1704015A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10360313A DE10360313B4 (de) 2003-12-18 2003-12-18 Schweißvorrichtung
PCT/EP2004/014513 WO2005058535A1 (fr) 2003-12-18 2004-12-15 Dispositif de soudage

Publications (1)

Publication Number Publication Date
EP1704015A1 true EP1704015A1 (fr) 2006-09-27

Family

ID=34683728

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04804111A Withdrawn EP1704015A1 (fr) 2003-12-18 2004-12-15 Dispositif de soudage

Country Status (4)

Country Link
US (1) US20070090096A1 (fr)
EP (1) EP1704015A1 (fr)
DE (1) DE10360313B4 (fr)
WO (1) WO2005058535A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1777029A1 (fr) * 2005-10-21 2007-04-25 Abb Ab Un outil pour soudage par point avec deux bras portant chacun une électrode et des moyens pour déplacer les bras suivant une trajectoire rectiligne
DE102008039435A1 (de) * 2008-08-25 2010-03-04 Volkswagen Ag Schweißzange und Schweißverfahren
KR20150137421A (ko) * 2014-05-29 2015-12-09 현대자동차주식회사 용접부 검사 시스템 및 그 제어방법

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3327510C2 (de) * 1983-07-29 1986-10-30 Bayerische Motoren Werke AG, 8000 München Schweißzange zum elektrischen Widerstandsschweißen
NL8304167A (nl) * 1983-12-05 1985-07-01 Weld Equip Bv Laskop voor weerstandslassen.
DE3927435A1 (de) * 1989-08-19 1991-02-21 Ferdinand Schwob Verfahren zur regelung des gewichtsausgleichs fuer den zangenkoerper von schiebe- oder scherenschweisszangen
JP3136865B2 (ja) * 1993-10-27 2001-02-19 トヨタ自動車株式会社 スポット溶接の溶着解除方法およびスポット溶接装置
DE69708805T2 (de) * 1996-09-13 2002-04-11 Dengensha Mfg Co Ltd Motorisch betätigte Widerstands-Punktschweissmaschine
JP3136282B2 (ja) * 1997-08-13 2001-02-19 ファナック株式会社 サーボガン軸の異常負荷検出方法及び装置
DE19738647A1 (de) * 1997-09-04 1999-03-25 Messer Griesheim Schweistechni Widerstandspreßschweißmaschine
JP3862956B2 (ja) * 1998-10-27 2006-12-27 株式会社ソディック 形彫放電加工装置の主軸装置
EP1010491B1 (fr) * 1998-12-16 2006-09-20 Dengensha Manufacturing Company Limited Machine de soudage par résistance
DE19948043A1 (de) * 1999-10-06 2001-04-12 Nimak Automatisierte Schweiste Roboterschweißzange
DE10127112A1 (de) * 2000-11-02 2002-08-01 Leander Reischmann Schweißkopf
FR2822743B1 (fr) * 2001-03-29 2003-08-08 Aro Pince-robot d'assemblage a dispositif de detalonnage et d'equilibrage auto-adaptatif
DE10144731B4 (de) * 2001-09-11 2004-01-15 Cosytronic Computer-System-Elektronic Gmbh Schweißzange sowie Verfahren zum Widerstandsschweißen mit Beurteilung der Qualität einer Schweißverbindung
DE10223821A1 (de) * 2002-05-28 2003-12-11 Matuschek Mestechnik Gmbh Schweisszange
AU2003240722A1 (en) * 2002-05-28 2003-12-12 Matuschek Messtechnik Gmbh Resistance spot welding gun

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005058535A1 *

Also Published As

Publication number Publication date
US20070090096A1 (en) 2007-04-26
DE10360313A1 (de) 2005-07-21
WO2005058535A1 (fr) 2005-06-30
DE10360313A8 (de) 2005-11-03
DE10360313B4 (de) 2006-07-06

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