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WO2024160497A1 - Procédé de détermination de qualité de connexion - Google Patents

Procédé de détermination de qualité de connexion Download PDF

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Publication number
WO2024160497A1
WO2024160497A1 PCT/EP2024/050441 EP2024050441W WO2024160497A1 WO 2024160497 A1 WO2024160497 A1 WO 2024160497A1 EP 2024050441 W EP2024050441 W EP 2024050441W WO 2024160497 A1 WO2024160497 A1 WO 2024160497A1
Authority
WO
WIPO (PCT)
Prior art keywords
eddy current
connection
measuring device
current measuring
quality
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/EP2024/050441
Other languages
German (de)
English (en)
Inventor
Martin Widmaier
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.)
Kromberg and Schubert Automotive GmbH and Co KG
Original Assignee
Kromberg and Schubert Automotive GmbH and Co KG
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 Kromberg and Schubert Automotive GmbH and Co KG filed Critical Kromberg and Schubert Automotive GmbH and Co KG
Priority to CN202480009195.8A priority Critical patent/CN120659995A/zh
Publication of WO2024160497A1 publication Critical patent/WO2024160497A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
    • 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
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
    • B23K31/125—Weld quality monitoring
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding

Definitions

  • the invention relates to a method for determining the quality of a connection, in particular for determining characteristic values representing the quality of the connection of electrically conductive elements.
  • eddy current measurement is used, for example, in the final inspection of ultrasonically welded joints.
  • the eddy current measurement does not detect all bad joints or defects, as the measurement only covers one level of the
  • weld node If the density is sufficient in this plane, the weld node is rated as "good", although there may be other areas that are not sufficiently welded. Weld knots, especially damaged ones, consist of areas of varying density. Damaged knots can also have areas of high density, especially if the knot still has its structural integrity.
  • the basic idea of the invention is to perceive and evaluate the knot as a three-dimensional object with different structures (e.g. strengths) in order to increase the detection rate of defects in the weld.
  • An eddy current measurement is intended to produce a three-dimensional image of the weld knot.
  • the values recorded for the amplitude and phase enable the evaluation of the weld node.
  • the 3D scan detects the zones of different densities, so that faulty parts can be reliably identified.
  • variants are also conceivable in which a two-dimensional or one-dimensional observation is carried out to determine characteristic values.
  • a method for determining the quality of a connection in particular for determining characteristic values representing the quality of a connection of electrically conductive elements, is proposed, in which first a plurality of eddy current measurements are carried out at predetermined positions of the connection using an eddy current measuring device and then an amplitude and a phase angle of the eddy current are recorded at the respective predetermined positions of the connection using the eddy current measuring device. A tensor and/or a matrix from the recorded amplitudes and the recorded phase angles are then determined using an evaluation unit. The quality of the connection is then determined, at least using a characteristic value based on the determined tensor and/or the determined matrix, using an evaluation unit.
  • an evaluation unit also refers to a control unit or a corresponding component for data processing and/or controlling electrically controllable components.
  • the eddy current measuring device is, for example, a fluxgate magnetometer or a Förster probe.
  • the method is also suitable, for example, for determining parameters for ultrasonic welding and/or validating the connection.
  • connection is an ultrasonically welded connection. Furthermore, the method determines the quality of the ultrasonically welded connection, in particular to determine Characteristic values representing the quality of the ultrasonically welded connection of the electrically conductive elements.
  • the eddy current measuring device comprises a sensor array for eddy current measurement and/or a handling device for the positionally variable arrangement of the eddy current measuring device in order to thereby carry out the plurality of eddy current measurements at different positions of the connection.
  • the plurality of eddy current measurements are carried out when the eddy current measurements are carried out with the sensor array by individual sensors of the sensor array arranged at the predetermined positions or when the eddy current measurements are carried out with the handling device by the eddy current measuring device, which is arranged at the different positions.
  • the sensor array it would also be conceivable for the sensor array to be arranged on a handling device which is designed to arrange the sensor array in a positionally variable manner. In this way, the accuracy of the eddy current measurement is increased.
  • the eddy current measurements are carried out along a predetermined xyz coordinate system of the connection with a depth (z).
  • an embodiment is advantageous in which the eddy current measurement is carried out along an xy plane of the xyz coordinate system, with the sensor array being arranged along the xy plane.
  • the sensor array of the eddy current measuring device is clocked at a predetermined time.
  • the sensors of the sensor array carry out
  • the eddy current measurements are carried out intermittently, individually, in pairs or with another predetermined number of sensors of the sensor array.
  • the eddy current measurement is carried out along an xy plane of the xyz coordinate system, wherein the eddy current measuring device is arranged at a plurality of positions along the xy plane by means of the handling device.
  • the eddy current measurement of this variant can be carried out at all predetermined positions.
  • the xy plane of the predetermined xyz coordinate system is defined along a weld seam and/or parallel to a weld plane. In this way, the implementation and evaluation of the eddy current measurements is optimized.
  • the eddy current measurements are carried out along the depth (z) of an xyz coordinate system of the connection.
  • a frequency of the eddy current measuring device is varied, in particular depending on the position, and the measurement is carried out for predetermined frequencies.
  • the eddy current measurement is carried out at a large number of predetermined positions along the depth (z) of the xyz coordinate system of the connection.
  • an eddy current measurement is also carried out with a noise signal from the eddy current measuring device, which includes all frequencies. In this way, measurements can be carried out at various predetermined positions in the z direction or along the depth (z) of the connection.
  • the invention provides that, when determining the at least one characteristic value representing the quality of the connection, the evaluation unit Characteristic value is determined using a learning algorithm and/or at least one other mathematical method.
  • the determined tensor and/or the determined matrix can be optimally analyzed or evaluated. It is also advantageous if the at least one other mathematical method is a standard deviation, a mean value, a maximum value, a Chi 2 test and/or a measure of dispersion.
  • the at least one characteristic value is a pull-off force and/or a peeling force of the connection. These characteristic values are particularly suitable for assessing the connection.
  • At least one further eddy current measuring device is provided, which is arranged radially spaced from the eddy current measuring device with respect to the connection. This further improves the accuracy of the eddy current measurement.
  • the invention provides that the at least one further eddy current measuring device is arranged in such a way that magnetic fields generated by the eddy current measuring devices run against each other.
  • the corresponding eddy current measuring device is arranged in such a way that magnetic fields generated hit the connection at an angle. In this way, fields are generated which are not orthogonal to the connection and the sensitivity of the eddy current measurement is further increased.
  • Fig. 1 is a schematic view of a device for determining the quality of an ultrasonically welded joint
  • Fig. 2 shows a schematic sequence of the method for determining the quality of an ultrasonically welded joint using the device.
  • Figure 1 shows a schematic view of a device for determining the quality of an ultrasonically welded connection 1.
  • the device initially comprises an eddy current measuring device 3 for carrying out a plurality of eddy current measurements at predetermined positions 11, 11' of the connection 1 and for detecting an amplitude and a phase angle of the eddy current at the respective predetermined positions 11, 11' of the connection 1.
  • a further eddy current measuring device 3' is provided, which is arranged radially spaced from the eddy current measuring device 3 with respect to the connection 1.
  • the at least one further eddy current measuring device 3' is arranged such that magnetic fields generated by the eddy current measuring devices 3, 3' run against one another.
  • the corresponding eddy current measuring device 3, 3' is arranged such that magnetic fields generated strike the connection 1 at an angle.
  • the device comprises an evaluation unit 4 for determining a tensor and/or a matrix from the detected amplitudes and the detected phase angle and for determining the quality of the ultrasonically welded connection 1, at least by means of a characteristic value based on the determined tensor and/or the determined matrix.
  • the at least one characteristic value can be determined by means of the evaluation unit 4 using a learning algorithm and/or at least one further mathematical method.
  • the device shown in Figure 1 comprises a handling device 32 for the positionally variable arrangement of the corresponding eddy current measuring device 3, 3' in order to thereby carry out the plurality of eddy current measurements at different positions of the ultrasonically welded connection 1.
  • Figure 2 shows a schematic sequence of the method for determining the quality of an ultrasonically welded connection 1 by means of the device described above.
  • a plurality of eddy current measurements are first carried out (step a) at predetermined positions 11, 1T of the connection 1 by means of an eddy current measuring device 3 and a further eddy current measuring device 3', which is arranged radially spaced from the eddy current measuring device 3 in relation to the connection 1.
  • the further eddy current measuring device 3' is arranged in such a way that magnetic fields generated by the eddy current measuring devices 3, 3' run against one another.
  • the corresponding eddy current measuring devices 3, 3' are arranged in such a way that the magnetic fields generated hit the connection 1 at an angle.
  • the respective eddy current measuring device 3, 3' comprises a sensor array 31 for Eddy current measurement and/or a handling device 32 for the position-variable arrangement of the eddy current measuring device 3 in order to thereby carry out the plurality of eddy current measurements at different positions of the ultrasonically welded connection 1.
  • the eddy current measurements are carried out along a predetermined xyz coordinate system of the connection 1 with a depth z.
  • the xy plane of the predetermined xyz coordinate system is defined along a weld seam and/or parallel to a weld plane.
  • the handling device 32 arranges the eddy current measuring device 3 at a plurality of positions 11, 1T along the xy plane.
  • the sensor array 31 of the eddy current measuring device 3 is arranged along the xy plane and clocked in a predetermined manner.
  • the eddy current measurements are carried out along the depth (z) of the xyz coordinate system of the connection 1.
  • a frequency of the eddy current measuring device 3 is varied, in particular depending on the position, and the measurement is carried out for predetermined frequencies.
  • the eddy current measurement is carried out at a plurality of predetermined positions 11, 1T along the depth (z) of the xyz coordinate system of the connection 1 by means of an eddy current measurement with a noise signal of the eddy current measuring device 3, which includes all frequencies.
  • step b an amplitude and a phase angle of the eddy current are recorded at the respective predetermined positions 11, 1T of the connection 1 by means of the eddy current measuring device 3 (step b).
  • a tensor and/or a matrix is then determined from the detected amplitudes and the detected phase angle by means of an evaluation unit 4 (step c).
  • the quality of the ultrasonically welded connection 1 is then determined (step d), at least by means of a characteristic value based on the determined tensor and/or the determined matrix by means of the evaluation unit 4.
  • the evaluation unit 4 determines the at least one characteristic value by means of an adaptive algorithm and/or at least one further mathematical method.
  • the at least one further mathematical method is a standard deviation, a mean value, a maximum value, a Chi 2 test and/or a measure of dispersion.
  • the at least one characteristic value is a pull-off force and/or a peeling force of the ultrasonically welded connection 1.
  • the invention is not limited in its implementation to the preferred embodiments given above. Rather, a number of variants are conceivable which make use of the solution presented even in fundamentally different embodiments.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Quality & Reliability (AREA)
  • Mechanical Engineering (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

L'invention concerne un procédé de détermination de la qualité d'une connexion (1), en particulier pour déterminer des valeurs caractéristiques représentant la qualité d'une connexion (1) d'éléments électriquement conducteurs (2), dans lequel une multitude de mesures de courant de Foucault est d'abord effectuée à des positions prédéterminées (11, 11') de la connexion (1) au moyen d'un dispositif de mesure de courant de Foucault (3), puis une amplitude et un angle de phase respectifs du courant de Foucault aux positions respectivement prédéterminées (11, 11') de la connexion (1) sont enregistrés au moyen du dispositif de mesure de courant de Foucault (3). Un tenseur et/ou une matrice comprenant les amplitudes enregistrées et les angles de phase enregistrés sont ensuite déterminés au moyen d'un dispositif d'évaluation/commande (4). La qualité de la liaison (1) est ensuite déterminée, au moins par une valeur caractéristique, sur la base du tenseur et/ou de la matrice déterminés, au moyen d'une unité d'évaluation (4).
PCT/EP2024/050441 2023-02-01 2024-01-10 Procédé de détermination de qualité de connexion Ceased WO2024160497A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202480009195.8A CN120659995A (zh) 2023-02-01 2024-01-10 用于确定连接质量的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023102464.7A DE102023102464A1 (de) 2023-02-01 2023-02-01 Verfahren zur Bestimmung der Güte einer Verbindung
DE102023102464.7 2023-02-01

Publications (1)

Publication Number Publication Date
WO2024160497A1 true WO2024160497A1 (fr) 2024-08-08

Family

ID=89620310

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/050441 Ceased WO2024160497A1 (fr) 2023-02-01 2024-01-10 Procédé de détermination de qualité de connexion

Country Status (3)

Country Link
CN (1) CN120659995A (fr)
DE (1) DE102023102464A1 (fr)
WO (1) WO2024160497A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020113588A1 (en) * 2000-09-21 2002-08-22 Espy Michelle A. SQUID array magnometer with multi-frequency induction
US20050017713A1 (en) * 2003-06-09 2005-01-27 Jentek Sensors, Inc. Weld characterization using eddy current sensors and arrays
CN103760230A (zh) * 2014-01-07 2014-04-30 天津大学 基于bp神经网络的焊接缺陷巨磁电阻涡流检测方法
EP4005725A1 (fr) * 2020-11-30 2022-06-01 Volkswagen AG Procédé de fabrication d'un élément de batterie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156862A (en) 1961-12-15 1964-11-10 Assembly Products Inc Electrical flaw detector apparatus having null plane positioned as well as electrically balanced coil arrangements
US3693075A (en) 1969-11-15 1972-09-19 Forster F M O Eddy current system for testing tubes for defects,eccentricity,and wall thickness

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020113588A1 (en) * 2000-09-21 2002-08-22 Espy Michelle A. SQUID array magnometer with multi-frequency induction
US20050017713A1 (en) * 2003-06-09 2005-01-27 Jentek Sensors, Inc. Weld characterization using eddy current sensors and arrays
CN103760230A (zh) * 2014-01-07 2014-04-30 天津大学 基于bp神经网络的焊接缺陷巨磁电阻涡流检测方法
EP4005725A1 (fr) * 2020-11-30 2022-06-01 Volkswagen AG Procédé de fabrication d'un élément de batterie

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Publication number Publication date
CN120659995A (zh) 2025-09-16
DE102023102464A1 (de) 2024-08-01

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