WO2008031925A1 - Weld-wire-filler identification apparatus and method - Google Patents

Weld-wire-filler identification apparatus and method Download PDF

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Publication number
WO2008031925A1
WO2008031925A1 PCT/FI2007/050483 FI2007050483W WO2008031925A1 WO 2008031925 A1 WO2008031925 A1 WO 2008031925A1 FI 2007050483 W FI2007050483 W FI 2007050483W WO 2008031925 A1 WO2008031925 A1 WO 2008031925A1
Authority
WO
WIPO (PCT)
Prior art keywords
filler wire
wire
determining
coil
welding
Prior art date
Application number
PCT/FI2007/050483
Other languages
French (fr)
Inventor
Tapani Mäkimaa
Original Assignee
Kemppi Oy
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 Kemppi Oy filed Critical Kemppi Oy
Publication of WO2008031925A1 publication Critical patent/WO2008031925A1/en

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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
    • B23K9/00—Arc welding or cutting
    • B23K9/095—Monitoring or automatic control of welding parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/12—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters
    • G01B7/125—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters of objects while moving
    • 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
    • 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
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • B23K9/124—Circuits or methods for feeding welding wire
    • B23K9/125—Feeding of electrodes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/12—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters
    • 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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance

Definitions

  • the present invention relates to a filler wire identification apparatus according to Claim 1.
  • the invention also relates to a method for identifying a filler wire.
  • the material of the filler wire affects the control parameters, the welding current and the welding voltage used in the welding.
  • the parameters relating to the type and diameter of the filler wire have been entered in the welding device manually, for example on the basis of data in the welding- wire package.
  • the information may be in the package in either verbal or code form.
  • the present invention is intended to eliminate the defects in the prior art and create an entirely new type of apparatus and method for identifying the type of filler wire.
  • the invention is based on measuring the properties of the filler wire electrically, so that the welding system receives accurate information on the filler wire being used.
  • the type of the filler wire can be identified reliably and errors made by the operator can be eliminated. As a result, the quality of the weld will improve.
  • FIG 1 shows schematically one welding-device assembly, which can be applied to the solution according to the invention.
  • Figure 2 shows a side view of one wire-identification apparatus according to the invention.
  • Figure 3 shows schematically one electrical circuit for use with the wire-identification apparatus according to Figure 2.
  • Figure 4 shows schematically a second electrical circuit for use with the wire- identification apparatus of Figure 2.
  • Figure 5 shows a schematic circuit scheme of one possible way to implement the exciter- generator in the solution according to Figure 3 or 4.
  • Figure 6 shows a schematic circuit scheme of one possible way to implement the current generator hi the solution according to Figure 4.
  • Figure 7 shows a supplemented system scheme of the solution according to Figure 4.
  • the energy required in MIG and MAG welding methods is obtained electrically from an arc.
  • the arc is created between the filler wire 2 and the workpiece 34 by means of a welding power supply 30, which typically also includes a wire-feed device 31. Both the necessary electrical energy and the filler wire 2 are fed to the welding gun 33 through a cable 32.
  • the arc bums between the melting filler wire and the workpiece. During welding, the filler wire 2 melts onto the workpiece.
  • the filler wire 2 is arranged to travel through a cylindrical identification coil 1 according to Figure 2, before it is fed to the welding nozzle.
  • the identification coil 1 is a normal electro-technical coil, in which one or more loops of an electrical conductor are formed around the same axis.
  • the coil thus typically forms a cylinder, on top of which there are one or more layers of a spiral, continuous conductor.
  • the filler wire 2 is arranged to travel through this cylindrical structure. This can be implemented, for example, inside the wire-feed device 31 of Figure 1, around the cable 32, or in the welding gun 33.
  • the filler wire 2 will then affect the inductance of the coil 1 in such a way that the ferromagnetic substances in the wire 2 increase the inductance of the coil 1 and the non-magnetic substances of the filler wire 2 correspondingly reduce the inductance.
  • the diameter of the filler wire 2 affects the inductance in such a way that the effect is approximately proportional to the cross-sectional area of the filler wire 2, so that the diameter can be identified quite well.
  • the appropriate measurement frequency depends on the material of the wire, in such a way that with ferromagnetic materials a relatively low frequency (10 - 20 kHz) can be used, but with non-magnetic materials, such as aluminium, the appropriate frequency is much higher, being preferably as much as several megahertz.
  • FIG. 3 shows the principle of the construction of a pilot device.
  • the alternating excitation current (AC) obtained from the exciter-generator 3 is taken via a resistor 4 to an identification coil 1, the voltage acting over which depends on the kind of filler wire 2 running through the coil 1.
  • the said voltage is amplified by an amplifier 5 and detected by a detector 6.
  • the detected signal is taken to window comparators 7, the control resistors 8 of which are each set to a threshold value corresponding to the filler wire 2.
  • the information coming from the window comparators 7 is interpreted by interpretation logic 9, from which information corresponding to each filler wire 2 is obtained.
  • FIG. 4 shows the construction principle of the bridge measurement.
  • the bridge is formed by the actual identification measurement coil 1, a reference coil 11 that is of the same kind as the identification coil 1, inside which there is not, however a wire, and two mutually identical current generators 12 and 13, which feed the coils 1 and 11.
  • the current generators 12 and 13 are controlled using the alternating electrical signal obtained from the exciter-generator 3, the frequency of which can vary from 1 kHz to 100 MHz.
  • the alternating current developed by the current generators 12 and 13 is led to the coils 1 and 11, over which a voltage is induced, which depends not only on the current
  • the signals obtained from the coils 1 and 11 are taken to a multiplier 14, which multiplies the difference between the signals of the coils 1 and 11 by the exciter signal.
  • the device is a synchronous detector, well known from radio technology.
  • the output signal 28 of the said multiplier 14 depends on both the amplitude and the phase of the input signals.
  • a crystal oscillator according to Figure 5 for example, the frequency of which can be changed by changing the crystal 15, can be used as the exciter-generator 3.
  • the exciter- generator can thus be implemented with the aid of a crystal 15, a transistor 17 and resistors 16, 18 and capacitors 19 connected to it.
  • the oscillation frequency can be changed electronically, for example with the aid of a semiconductor switch.
  • a crystal oscillator and a frequency limiter connected after it, from which signals of different frequency can be obtained can also be used as the exciter-generator.
  • a microprocessor 26 or hardwired logic according to Figure 8 can be used in a known manner for controlling the frequency change and for analysing the output signal 28 of the multiplier 14. The analysed signal is obtained as the output 27.
  • the current generator 12 and 13 can be implemented, for example, in the well-known manner shown by Figure 6, with the aid of a transistor 21 and resistors 25 and 24 connected to it, in which case the control signal is fed to the input 22 and the output signal is obtained from the output 23.
  • the multiplier 14 can be, for example, a Gilbert cell, such as are used widely, for example, in general radio receivers.
  • the multiplication calculation can also be made digitally, in such way that samples are taken of the voltages of the coils 1 and 11 at at least the frequency required by the sampling theorem and the samples are converted by an AD converter into digital signals, which are multiplied by software.
  • the term electrical properties of a filler wire typically refers to the identification of the type of filler wire.
  • the term type of filler wire refers in turn usually to the dimension of the wire and its material (raw material).
  • the measurement of the filler wire can take place, for example, by frequency scanning over the desired frequency range, or alternatively by using predefined point-type measuring frequencies. There can be, for example, three point-type measuring frequencies.
  • Inductive measurement can be implemented using either a single measuring coil, or alternatively in such a way that each frequency range has its own coil. A combination of the aforementioned solutions is also possible according to the invention.
  • the invention can also be used for detecting the ending of the wire, in which case the apparatus will give an alarm if the wire ends.

Abstract

The invention relates to an apparatus for identifying a filler wire (2) in a welding apparatus, by means of which an arc is created. The welding apparatus comprises a filler wire (2), means (31, 32) for feeding the filler wire (2), and means (30, 32) for supplying electrical energy to the filler wire (2), in order to create an arc between the filler wire (2) and a workpiece (34). According to the invention the apparatus comprises means (1) for determining the electrical properties of the filler wire (2).

Description

Weld- Wire-Filler Identification Apparatus and Method
The present invention relates to a filler wire identification apparatus according to Claim 1.
The invention also relates to a method for identifying a filler wire.
According to the prior art, in MIG and MAG welding, the material of the filler wire affects the control parameters, the welding current and the welding voltage used in the welding. According to the prior art, the parameters relating to the type and diameter of the filler wire have been entered in the welding device manually, for example on the basis of data in the welding- wire package. The information may be in the package in either verbal or code form.
The manual entry of data is difficult and an inexperienced operator can make mistakes when entering filler wire information. Erroneous information can lead to quality problems in the final weld.
The present invention is intended to eliminate the defects in the prior art and create an entirely new type of apparatus and method for identifying the type of filler wire.
The invention is based on measuring the properties of the filler wire electrically, so that the welding system receives accurate information on the filler wire being used.
More specifically, the apparatus according to the invention is characterized by what is stated in the characterizing portion of Claim 1.
For its part, the method according to the invention is characterized by what is stated in Claim 9.
Considerable advantages are gained with the aid of the invention.
The type of the filler wire can be identified reliably and errors made by the operator can be eliminated. As a result, the quality of the weld will improve.
In the following, the invention is examined with the aid of examples of applications of an embodiment according to the accompanying drawings.
Figure 1 shows schematically one welding-device assembly, which can be applied to the solution according to the invention.
Figure 2 shows a side view of one wire-identification apparatus according to the invention.
Figure 3 shows schematically one electrical circuit for use with the wire-identification apparatus according to Figure 2.
Figure 4 shows schematically a second electrical circuit for use with the wire- identification apparatus of Figure 2.
Figure 5 shows a schematic circuit scheme of one possible way to implement the exciter- generator in the solution according to Figure 3 or 4.
Figure 6 shows a schematic circuit scheme of one possible way to implement the current generator hi the solution according to Figure 4.
Figure 7 shows a supplemented system scheme of the solution according to Figure 4.
In the description of the invention, the following terminology will be used:
1 identification coil
2 filler wire 3 exciter-generator
4 ballast resistor
5 amplifier
6 detector 7 adjustable comparator
8 reference voltage control
9 interpretation logic
10 logic output
11 reference coil
12 first power supply
13 second power supply
14 multiplier
15 crystal
16 pull-up resistor
17 transistor
18 resistor
19 capacitor
20 current output
21 transistor
22 input
23 output
24 resistor
25 pull-up resistor
26 processor
27 information output
28 multiplier output
30 welding power supply
31 wire-feed device
32 cable
33 gun
34 workpiece
According to Figure 1, the energy required in MIG and MAG welding methods is obtained electrically from an arc. The arc is created between the filler wire 2 and the workpiece 34 by means of a welding power supply 30, which typically also includes a wire-feed device 31. Both the necessary electrical energy and the filler wire 2 are fed to the welding gun 33 through a cable 32. In MIG/MAG welding, the arc bums between the melting filler wire and the workpiece. During welding, the filler wire 2 melts onto the workpiece.
According to the invention, the filler wire 2 is arranged to travel through a cylindrical identification coil 1 according to Figure 2, before it is fed to the welding nozzle. The identification coil 1 is a normal electro-technical coil, in which one or more loops of an electrical conductor are formed around the same axis. The coil thus typically forms a cylinder, on top of which there are one or more layers of a spiral, continuous conductor. According to the invention, the filler wire 2 is arranged to travel through this cylindrical structure. This can be implemented, for example, inside the wire-feed device 31 of Figure 1, around the cable 32, or in the welding gun 33. The filler wire 2 will then affect the inductance of the coil 1 in such a way that the ferromagnetic substances in the wire 2 increase the inductance of the coil 1 and the non-magnetic substances of the filler wire 2 correspondingly reduce the inductance. In addition to this, the diameter of the filler wire 2 affects the inductance in such a way that the effect is approximately proportional to the cross-sectional area of the filler wire 2, so that the diameter can be identified quite well. The appropriate measurement frequency depends on the material of the wire, in such a way that with ferromagnetic materials a relatively low frequency (10 - 20 kHz) can be used, but with non-magnetic materials, such as aluminium, the appropriate frequency is much higher, being preferably as much as several megahertz.
Figure 3 shows the principle of the construction of a pilot device. The alternating excitation current (AC) obtained from the exciter-generator 3 is taken via a resistor 4 to an identification coil 1, the voltage acting over which depends on the kind of filler wire 2 running through the coil 1. The said voltage is amplified by an amplifier 5 and detected by a detector 6. The detected signal is taken to window comparators 7, the control resistors 8 of which are each set to a threshold value corresponding to the filler wire 2. The information coming from the window comparators 7 is interpreted by interpretation logic 9, from which information corresponding to each filler wire 2 is obtained.
If better discrimination is required, it will then be advantageous to make a bridge measurement according to Figure 4, in which case the discrimination will improve substantially. The measuring principle as such remains as before, i.e. the measurement is still based on the change in the impedance of the coil 1 caused by the filler wire 2 travelling through the identification coil 1. If the measurement is made at several different frequencies, a significant improvement in discrimination will be possible. Figure 4 shows the construction principle of the bridge measurement. In this case, the bridge is formed by the actual identification measurement coil 1, a reference coil 11 that is of the same kind as the identification coil 1, inside which there is not, however a wire, and two mutually identical current generators 12 and 13, which feed the coils 1 and 11. The current generators 12 and 13 are controlled using the alternating electrical signal obtained from the exciter-generator 3, the frequency of which can vary from 1 kHz to 100 MHz.
The alternating current developed by the current generators 12 and 13 is led to the coils 1 and 11, over which a voltage is induced, which depends not only on the current
(frequency and amplitude), but also on the impedance of the coils 1 and 11. The signals obtained from the coils 1 and 11 are taken to a multiplier 14, which multiplies the difference between the signals of the coils 1 and 11 by the exciter signal. The device is a synchronous detector, well known from radio technology. As is known, the output signal 28 of the said multiplier 14 depends on both the amplitude and the phase of the input signals. Thus, because wire 2 travelling through the identification coil 1 influences the impedance in a manner that depends on both the material and the dimension of the wire 2, it is possible to identify the filler wire 2. For the identification to be sufficiently reliable, the identification must be made at several different frequencies, unless previous information on the wire 2 exists. If limiting conditions (e.g., the material of the wire) are available, the dimension can be identified using only a single frequency.
A crystal oscillator according to Figure 5, for example, the frequency of which can be changed by changing the crystal 15, can be used as the exciter-generator 3. The exciter- generator can thus be implemented with the aid of a crystal 15, a transistor 17 and resistors 16, 18 and capacitors 19 connected to it. The oscillation frequency can be changed electronically, for example with the aid of a semiconductor switch. Alternatively, a crystal oscillator and a frequency limiter connected after it, from which signals of different frequency can be obtained, can also be used as the exciter-generator. A microprocessor 26 or hardwired logic according to Figure 8 can be used in a known manner for controlling the frequency change and for analysing the output signal 28 of the multiplier 14. The analysed signal is obtained as the output 27.
If the measurement must be made over a large frequency range, a good alternative to an exciter-generator is the use of direct frequency synthesis.
For its part, the current generator 12 and 13 can be implemented, for example, in the well-known manner shown by Figure 6, with the aid of a transistor 21 and resistors 25 and 24 connected to it, in which case the control signal is fed to the input 22 and the output signal is obtained from the output 23.
The multiplier 14 can be, for example, a Gilbert cell, such as are used widely, for example, in general radio receivers. The multiplication calculation can also be made digitally, in such way that samples are taken of the voltages of the coils 1 and 11 at at least the frequency required by the sampling theorem and the samples are converted by an AD converter into digital signals, which are multiplied by software.
In the present application, the term electrical properties of a filler wire typically refers to the identification of the type of filler wire. The term type of filler wire refers in turn usually to the dimension of the wire and its material (raw material).
According to the invention, the measurement of the filler wire can take place, for example, by frequency scanning over the desired frequency range, or alternatively by using predefined point-type measuring frequencies. There can be, for example, three point-type measuring frequencies.
Low frequencies are well suited to the identification of ferromagnetic filler wires, whereas higher frequencies are well suited to the identification of non-magnetic or slightly magnetic materials such as aluminium and certain stainless and acid-resistant steels. Inductive measurement can be implemented using either a single measuring coil, or alternatively in such a way that each frequency range has its own coil. A combination of the aforementioned solutions is also possible according to the invention.
The invention can also be used for detecting the ending of the wire, in which case the apparatus will give an alarm if the wire ends.

Claims

Claims:
1. Apparatus for identifying a filler wire (2) in a welding apparatus, by means of which an arc is created between the filler wire (2) and a workpiece (34), which apparatus comprises
- the filler wire (2),
- means (31, 32) for feeding the filler wire (2), and
- means (30, 32) for supplying electrical energy to the filler wire (2), hi order to create an arc between the filler wire (2) and the workpiece (34), characterized in that
- the apparatus comprises an identification coil (1), through which the filler wire (2) can be led, and
- means for determining the impedance of the identifier coil (1) for determining the diameter and material of the filler wire (2).
2. Apparatus according to Claim 1, characterized in that the means (1) for determining the electrical properties of the filler wire (2) are located in the wire-feed device (31).
3. Apparatus according to Claim 1 or 2, characterized in that the means (1) for determining the electrical properties of the filler wire (2) are located around the cable (32).
4. Apparatus according to Claim 1, 2, or 3, characterized in that the means (1) for determining the electrical properties of the filler wire (2) are located in the gun (33) of the welding device.
5. Apparatus according to any of the above Claims, characterized in that the means for determining the impedance of the identification coil (1) are formed with the aid of a window comparator (9).
6. Apparatus according to any of Claims 1 - 5, characterized in that the means for determining the impedance of the identification coil (1) are formed as a bridge circuit (1, U, 12, 13).
7. Method for identifying a filler wire (2) in a welding apparatus, in which method
- an arc is created between the filler wire (2) and a workpiece (34), and
- the filler wire (2) is fed towards the workpiece (34) as the welding progresses, characterized in that
- the electrical properties of the filler wire (2) are measured with the aid of an identification coil (1), in such a way that the filler wire (2) is led through the identification coil and the impedance of the identification coil (1) is measured in order to determine the diameter and material of the filler wire (2), and - the welding event is controlled on the basis of the measurement results.
8. Method according to Claim 7, characterized in that the filler wire (2) is led through the identification coil (1) and the electrical properties of the identification coil (1) are measured.
9. Method according to Claim 7 or 8, characterized in that the means (1) for determining the electrical properties of the filler wire (2) are located in a wire-feed device (31).
10. Method according to Claim 7, 8, or 9, characterized in that the means (1) for determining the electrical properties of the filler wire (2) are located around a cable (32).
11. Method according to Claim 7, 8, 9, or 10, characterized in that the means (1) for determining the electrical properties of the filler wire (2) are located in the gun (33) of the welding device.
12. Method according to any of the above Claims, characterized in that the means for determining the impedance of the identification coil (1) are formed with the aid of a window comparator (9).
13. Method according to any of Claims 7 - 12, characterized in that the means for determining the impedance of the identification coil (1) are formed as a bridge circuit (1, 11, 12, 13).
PCT/FI2007/050483 2006-09-12 2007-09-12 Weld-wire-filler identification apparatus and method WO2008031925A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20060813A FI120578B (en) 2006-09-12 2006-09-12 Apparatus Yarn Detection Apparatus and Method
FI20060813 2006-09-12

Publications (1)

Publication Number Publication Date
WO2008031925A1 true WO2008031925A1 (en) 2008-03-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3357622A1 (en) * 2017-02-07 2018-08-08 Fronius International GmbH Method and device for detecting a welding wire diameter or a welding wire composition in a welder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0878263A1 (en) * 1997-05-16 1998-11-18 Illinois Tool Works Inc. Welding machine
EP1516688A1 (en) * 2003-09-18 2005-03-23 Illinois Tool Works Inc. Welding-type system with controller configured for automatic determination of the type of consumables
WO2007027117A1 (en) * 2005-09-01 2007-03-08 João R. Matos S.A. Conductor wire properties detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0878263A1 (en) * 1997-05-16 1998-11-18 Illinois Tool Works Inc. Welding machine
EP1516688A1 (en) * 2003-09-18 2005-03-23 Illinois Tool Works Inc. Welding-type system with controller configured for automatic determination of the type of consumables
WO2007027117A1 (en) * 2005-09-01 2007-03-08 João R. Matos S.A. Conductor wire properties detector

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3357622A1 (en) * 2017-02-07 2018-08-08 Fronius International GmbH Method and device for detecting a welding wire diameter or a welding wire composition in a welder
WO2018146023A1 (en) * 2017-02-07 2018-08-16 Fronius International Gmbh Method and apparatus for detecting a welding wire diameter or a welding wire composition in a welding device
CN110366469A (en) * 2017-02-07 2019-10-22 弗罗纽斯国际有限公司 For detecting the method and apparatus of gage of wire or component of weld wire in welding equipment
CN110366469B (en) * 2017-02-07 2021-06-22 弗罗纽斯国际有限公司 Method and device for detecting the diameter or composition of a welding wire in a welding device
US11597025B2 (en) 2017-02-07 2023-03-07 Fronius International Gmbh Method and device for detecting a welding wire diameter or welding wire composition in a welding device

Also Published As

Publication number Publication date
FI120578B (en) 2009-12-15
FI20060813A0 (en) 2006-09-12
FI20060813A (en) 2008-03-13

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