WO2021019105A1 - Dispositif d'évaluation d'équipements de soudure fbw et procédé d'évaluation associé - Google Patents

Dispositif d'évaluation d'équipements de soudure fbw et procédé d'évaluation associé Download PDF

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Publication number
WO2021019105A1
WO2021019105A1 PCT/ES2019/070542 ES2019070542W WO2021019105A1 WO 2021019105 A1 WO2021019105 A1 WO 2021019105A1 ES 2019070542 W ES2019070542 W ES 2019070542W WO 2021019105 A1 WO2021019105 A1 WO 2021019105A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
equipment
welding
current meter
welding equipment
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/ES2019/070542
Other languages
English (en)
Spanish (es)
Inventor
Egoitz ALDANONDO BEGIRISTAIN
Daniel BILBAO LUENGAS
Onintze MATÍAS GARMENDIA
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.)
Lortek S Coop
Vicinay Marine Innovation AIE
Original Assignee
Lortek S Coop
Vicinay Marine Innovation AIE
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 Lortek S Coop, Vicinay Marine Innovation AIE filed Critical Lortek S Coop
Priority to PCT/ES2019/070542 priority Critical patent/WO2021019105A1/fr
Publication of WO2021019105A1 publication Critical patent/WO2021019105A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B23K11/04—Flash butt welding
    • B23K11/046—Apparatus therefor
    • 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
    • B23K11/04—Flash butt welding

Definitions

  • the present invention falls within the technical field of resistance welding; more specifically in that of flash butt welding, and refers in particular to a device for evaluating the status of welding equipment, preferably those used in sputter welding, and a procedure for evaluating welding equipment associated with said device .
  • Splash welding also known as FBW welding (Flash Butt Welding)
  • FBW welding Flash Butt Welding
  • FBW welding Flash Butt Welding
  • EP1342529 describes a method and a device for controlling the spark welding process of two metallic pieces comprising means for continuous measurement of a set of electrical welding parameters, said parameters being at least the voltage and intensity of the welding current that passes between two pairs of jaws.
  • the object of the invention consists of a device for evaluating equipment FBW welding that makes it possible to determine the presence of debris, mainly in the form of metallic projections, accumulated in said welding equipment, and consequently estimate their ability to carry out welding operations under acceptable conditions.
  • the invention also includes an evaluation procedure for FBW welding equipment associated with the device.
  • FBW welding equipment for the realization of a spark butt welding of two metal parts arranged opposite each other along a longitudinal axis of movement, typically comprise at least:
  • both frames being made of an electrical insulating material through which a current conducting element runs
  • some electric welding means which in turn comprise an electric current source having two poles connected by means of the current-conducting element, respectively, to the two pairs of clamping jaws,
  • the device for evaluating these welding equipment, and the method associated with it, is based on the detection of parasitic currents generated by accumulated waste in the form of metallic projections on the welding equipment.
  • the eddy currents generate losses of current and electrical energy at the ends of the pieces where the welded joint is generated.
  • the device comprises a flexible current meter, coupled to the FBW welding equipment, and a power source and a high-sensitivity monitoring element, both in turn connected to the flexible current meter.
  • the flexible current meter is, in a preferred embodiment of the device, a Rogowski coil, of essentially annular geometry, which allows its easy adaptation to the geometry and special dimensions of the welding equipment.
  • the device's flexible current meter is temporarily coupled to the welding equipment when it is idle, without metal parts to be welded, to detect eddy currents derived from accumulated metal projections when said equipment is activated.
  • welding equipment When welding equipment is operating and welding parts, it may be necessary to remove the meter, since the current flowing is so strong that it could render it useless.
  • the FBW welding equipment evaluation procedure associated with the device described above, comprises the following stages:
  • the visualization of the data related to the eddy currents collected by the flexible current meter, and its comparison with the previously established eddy current levels, allows to establish the degree of accumulation of metallic projections and other debris in the FBW welding equipment.
  • the evaluator can make a decision, based on objective data, about whether or not to carry out maintenance actions, in order to guarantee the quality of the joints and the integrity of the equipment.
  • the FBW welding equipment evaluation device thus described is a simple, economical and reliable solution to determine the status of the welding equipment, with a high degree of precision that allows determining the optimal moment to carry out the necessary maintenance operations and in this way to ensure the quality of the welded joints.
  • Figure 1. Shows a schematic view of the device installed in a FBW welding equipment, in which its main constituent elements can be seen.
  • Figure 2. Shows a schematic diagram that relates the current intensity (in amps) measured by the device, related to its variation over time (in seconds), to determine threshold values of current intensity.
  • the described FBW welding equipment evaluation device is intended for the detection of eddy currents derived from the accumulation of metallic projections and other debris in FBW welding equipment, to determine the optimal moment to carry out the necessary maintenance tasks and ensure the quality of the welded joints.
  • the FBW welding equipment allows to butt weld two metal parts arranged opposite each other along a longitudinal axis of displacement, and for this it comprises:
  • both frames (1, T) being made of a material with electrical insulation capacity;
  • some electric welding elements comprising an electric current source with two poles connected, respectively, to the two pairs of clamping jaws (2, 2 ') through the current conducting elements, and
  • the evaluation device shown schematically in figure 1, comprises a flexible current meter (3), coupleable to the welding equipment, a power source (4) and a high sensitivity monitoring element (5) both connected to its once to the flexible current meter (3).
  • the device additionally comprises display and control means (6), linked to the monitoring element (5), in this case consisting of computer equipment configured for said purpose.
  • the flexible current meter (3) consists in this preferred embodiment of a Rogowski coil that can be coupled to the current conducting elements of both the fixed frame (1) and those corresponding to the moving frame (1 ') of the FBW welding equipment, for detection of eddy currents generated by accumulated metallic projections.
  • the Rogowski coil is an electronic device used as a transducer for measuring alternating current or fast current pulses. It consists mainly of a coil of helix-shaped wire, wound around a circumference, like a torus, but with an air core, in which the two terminals are close to each other.
  • the coil closes around the element in which the current is to be measured, in this case one of the conductors of the welding equipment through which the current circulates, and given that the voltage induced in the coil by the power source (4) is proportional to the speed with which the current measured on the frame (1, 1 ') in question varies, or to its temporal derivative, the output obtained in the Rogowski coil is usually connected to an integrating device to obtain the signal proportional to the current flowing through the conductive elements.
  • Rogowski coil compared to other types of current meters is that due to its design it can be open and flexible, which allows it to measure a conductive element without disturbing it. Since the Rogowski coil does not have an iron core, but an air core, it allows for a low inductance and response to rapidly varying currents. Furthermore, the absence of a saturating iron core provides high linearity, even when measuring large currents, such as those observed in transmission of high power electrical energy or FBW welding of large section parts.
  • Rogowski coil Another advantage of the Rogowski coil compared to other types of current meters is its ease of assembly and disassembly, making the evaluation procedure object of the present invention present a low technical complexity of application and reduced evaluation time.
  • the monitoring element (5) consists of an oscilloscope connected to the flexible current meter (3), which allows the visualization of the small current variations measured by it.
  • this preferred embodiment incorporates display and control means (6), consisting of computer equipment connected to the monitoring element (5).
  • Said computer equipment suitably configured to display and control the parasitic current values detected by the flexible current meter (3) in one of the welding equipment conductors through which the current circulates (1), has stored values eddy current values previously determined for the welding equipment in an optimal state, after exhaustive cleaning and adjustment, which are used as standard values.
  • the parasitic current detected by the flexible current meter (3) will have a value considered acceptable, in comparison with the previously determined standard values. If said parasitic current has abnormally high values, it is indicative of a degree of dirt accumulated on the frame in question (1, 1 ') that makes it necessary to carry out maintenance and cleaning operations on the welding equipment.
  • the attached figure 2 shows a schematic diagram that relates the current intensity (in amps) measured by the device, related to its variation over time (in seconds), to determine threshold values of current intensity detected that indicate in an approximate way the amount of accumulated waste.
  • an intensity value corresponds to the one determined by the device when the FBW welding equipment is completely free of debris, either because it is new or has been subjected to an exhaustive cleaning, so it could be considered as the level of parasitic current inherent in the equipment itself, due to the characteristics of its construction elements.
  • An intensity value equal to or less than ah would give rise to a positive evaluation, since it would be related to an eddy current generated by a level of accumulated debris that does not compromise the correct operation of the FBW welding equipment, therefore no action is required. maintenance.
  • the intensity value determined as ax is the maximum intensity threshold level determined by the device, up to which it can be considered acceptable, in which the equipment works correctly and the quality of the welded joints obtained is not compromised.
  • Intensity values higher than said ax give rise to a negative evaluation, since they are parasitic current values that are related to a level of accumulated waste such that it would compromise the correct operation of the FBW welding equipment. When this level is reached or exceeded, it would be necessary to carry out maintenance actions.
  • indicator elements linked to the monitoring element or to the display and control means, for automatic issuance of a warning when previously established current values are exceeded.
  • Said indicator elements can be both visual and acoustic in nature, and represent an additional element to help an evaluator in making decisions.
  • the FBW welding equipment evaluation procedure associated with the device described above, comprises the following stages:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding Control (AREA)

Abstract

L'invention concerne un procédé d'évaluation d'équipements de soudage FBW, l'équipement comprenant au moins un bâti fixe (1) et un bâti mobile (1'), des éléments conducteurs de courant qui s'étendent à l'intérieur des bâtis (1, 1'), deux paires de mâchoires (2, 2') pour la fixation des pièces métalliques à souder, et des éléments électriques de soudure. Le dispositif comprend un dispositif de mesure de courant (3) pouvant être relié aux éléments conducteurs de courant pour la détection de courants parasites générés par des projections métalliques de soudure accumulées sur l'équipement; une source d'alimentation (4) externe, reliée au dispositif de mesure de courant (3), un élément de surveillance (5) relié au dispositif de mesure de courant (3), pour la visualisation des variations de courant déterminées par ledit dispositif de mesure de courant (3), et des moyens de visualisation et commande (6), pour le suivi des variations de courant déterminées par le dispositif de mesure de courant (3).
PCT/ES2019/070542 2019-07-30 2019-07-30 Dispositif d'évaluation d'équipements de soudure fbw et procédé d'évaluation associé Ceased WO2021019105A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/ES2019/070542 WO2021019105A1 (fr) 2019-07-30 2019-07-30 Dispositif d'évaluation d'équipements de soudure fbw et procédé d'évaluation associé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2019/070542 WO2021019105A1 (fr) 2019-07-30 2019-07-30 Dispositif d'évaluation d'équipements de soudure fbw et procédé d'évaluation associé

Publications (1)

Publication Number Publication Date
WO2021019105A1 true WO2021019105A1 (fr) 2021-02-04

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1342529A2 (fr) 2002-03-05 2003-09-10 Vai Clecim Procédé et dispositif de contrôle du processus de soudage par étincelage de deux pièces métalliques
US20040094516A1 (en) * 2000-09-26 2004-05-20 De Pra Jean Marie Method for real time dynamic diagnosis and decision assistance, for an electric direct spark butt electric welder and its weld seams
WO2008089422A2 (fr) * 2007-01-19 2008-07-24 Admmicro Properties, L.L.C. Ensemble de transformateur de courant flexible
WO2018203859A2 (fr) * 2016-12-29 2018-11-08 T.C. Erci̇yes Üni̇versi̇tesi̇ Dispositif de protection contre le courant vagabond

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040094516A1 (en) * 2000-09-26 2004-05-20 De Pra Jean Marie Method for real time dynamic diagnosis and decision assistance, for an electric direct spark butt electric welder and its weld seams
EP1342529A2 (fr) 2002-03-05 2003-09-10 Vai Clecim Procédé et dispositif de contrôle du processus de soudage par étincelage de deux pièces métalliques
WO2008089422A2 (fr) * 2007-01-19 2008-07-24 Admmicro Properties, L.L.C. Ensemble de transformateur de courant flexible
WO2018203859A2 (fr) * 2016-12-29 2018-11-08 T.C. Erci̇yes Üni̇versi̇tesi̇ Dispositif de protection contre le courant vagabond

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