WO2013012356A1 - PROCÉDÉ DE COMMANDE D'UN INVERSEUR DE COURANT AUTONOME À SORTIE DE TRANSFORMATION UTILISÉ POUR LE SOUDAGE À L'ARC PAR UN COURANT À IMPULSIONS CARRÉES ET DISPOSITIF DE SA MISE EN œUVRE - Google Patents

PROCÉDÉ DE COMMANDE D'UN INVERSEUR DE COURANT AUTONOME À SORTIE DE TRANSFORMATION UTILISÉ POUR LE SOUDAGE À L'ARC PAR UN COURANT À IMPULSIONS CARRÉES ET DISPOSITIF DE SA MISE EN œUVRE Download PDF

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Publication number
WO2013012356A1
WO2013012356A1 PCT/RU2012/000466 RU2012000466W WO2013012356A1 WO 2013012356 A1 WO2013012356 A1 WO 2013012356A1 RU 2012000466 W RU2012000466 W RU 2012000466W WO 2013012356 A1 WO2013012356 A1 WO 2013012356A1
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WO
WIPO (PCT)
Prior art keywords
transformer
current
output
inverter
input
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/RU2012/000466
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English (en)
Russian (ru)
Inventor
Сергей Михайлович АНПИЛОВ
Виктор Михайлович ШИГИН
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Individual
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Individual
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Publication of WO2013012356A1 publication Critical patent/WO2013012356A1/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
    • B23K9/00—Arc welding or cutting
    • B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
    • B23K9/091—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits
    • B23K9/092—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits characterised by the shape of the pulses produced
    • 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
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • 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
    • B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof

Definitions

  • the invention relates to the field of engineering, namely to welding production, in particular to technology and equipment for the arc welding of metals and their alloys with a rectangular current and can be used for welding aluminum and its alloys with a non-consumable electrode in a protective gas environment.
  • a known method of controlling a push-pull bridge inverter operating on a symmetrical load ("Power sources for welding” V.S. Milyutin, M.P. Shalimov, S.M.Shanchurov, M., "Iris-press", 2007, p. 239, Fig. 4.48).
  • the control of the inverter transistors is carried out by control pulses modulated in duration without taking into account the state of the transformer magnetic circuit.
  • the disadvantage of this method is the strong dependence of the accuracy of the compensation of the DC component of the secondary current of the transformer on the welding mode and the need for a transformer with increased scattering.
  • a device for the arc welding of aluminum and its alloys containing a power source, a transformer and a device for suppressing the DC component of the output current of the transformer ("Power sources for welding" V. S. Milyutin, M. P. Shalimov, S. M. Shanchurov, M. , Iris Press, 2007, p. 306, Fig. 6.14).
  • the disadvantage of this device is the strong dependence of the accuracy of the compensation of the DC component of the secondary current of the transformer on the welding mode and the need for a transformer with increased scattering.
  • a device for arc welding of aluminum alloys with an alternating current rectangular shape non-consumable electrode (Power sources for welding” V.S. Milyutin, M.P. Shalimov, S.M.Shanchurov, M., "Iris-press", 2007, p. 31 1, Fig. 6.17), adopted by the applicant as a prototype and containing an input rectifier, a filter, a resonant inverter, a transformer, an output rectifier connected in series, the output of which is through a bridge transistor switch, which forms an alternating current on the arc gap, and a pulse arc stabilizer is connectedwith product and electrode.
  • the disadvantage of this device is its high complexity and low energy efficiency, due to the multiple conversion of electrical energy.
  • An object of the invention is to increase the energy efficiency of the device by reducing the number of conversions of electrical energy, primarily on the load voltage, increasing the reliability of the device by optimizing the number of elements and simplifying the design while ensuring optimal welding conditions.
  • the stated technical problem is solved in that the load is connected directly to the terminals of the secondary winding of the transformer, and the formation of a signal for switching the inverter transistors to change the sign of the inverter output voltage is performed as a function of the absolute value of the magnetization current of the transformer, which is calculated as the difference between the currents of the primary and secondary transformer windings,
  • the transformer primary and secondary winding current sensors and the inverter control unit which contains an adder, a module selection unit, a magnetization current setting task unit, a comparison unit, and a counting trigger, are additionally introduced into the rectangular-type AC arc welding device.
  • FIG. 1 shows a functional diagram of a device for arc welding with alternating current of rectangular shape
  • FIG. 2 shows diagrams of voltage and arc current during argon - arc welding of aluminum by a nonconsumable electrode by a known method
  • FIG. 3 shows diagrams of voltage and arc current during argon - arc welding of aluminum by a non-consumable electrode according to the proposed method: a) - first-time operation at idle; b) - steady state.
  • FIG. 4 shows an equivalent circuit of a device for implementing a method of arc welding with an alternating current of a rectangular shape.
  • the controlled rectifier, inductive filter and inverter are replaced by source 1 with the characteristic of a current source having infinite internal resistance in the operating voltage range, the load is presented as a nonlinear element 3 and transformer 2 characterized by the scattering inductances of the primary L sl _ secondary L s2 of the windings and the nonlinear inductance of the magnetization circuit b, respectively, by the inductive resistances Xsi, Xs 2 > ⁇
  • the inductive dissipation resistance Xs t , Xs2> of the windings is much less than the inductive resistance of the magnetization circuit ⁇ ⁇ , respectively, the voltage on the magnetization inductance is approximately equal to the load voltage.
  • the arc voltage during the flow of direct current U np (t) differs significantly from the voltage U 0 6 P (t) when the reverse current flows (Fig. 2), and both voltages can vary significantly depending on arc length and temperature of the working part of the non-consumable electrode.
  • the essence of the proposed method lies in the fact that the voltage at the load is integrated directly by the transformer’s magnetic circuit through the magnetization current ⁇ ⁇ , the measurement of which is possible with high accuracy, minimum delays and which is the subject of regulation in the proposed method.
  • a control device for a standalone current inverter with a transformer output for arc welding of rectangular rectangular current (Fig. 1), consists of a controlled rectifier 1, inductive filter 2, transistor inverter 3, transformer 4 with primary 5 and secondary 6 windings, electrode 7 and product 8 forming an arc gap.
  • an inverter control unit 1 which contains an adder 12, a module allocation unit 13, a magnetization current setting unit 14, a comparison unit 15 and a counting trigger 16, the outputs of the controlled rectifier 1 being connected through an inductive filter 2 with the input of the inverter 3, the first output of which is connected to the first output of the primary winding 5, the second output, which is connected through the current sensor 9 of the primary winding 5 to the second output of the transistor inverter 3, the first output of the secondary winding 6 is connected with the electrode 7, and the second output through the current sensor 10 of the secondary winding 6 is connected to the product 8, the output of the current sensor 9 of the primary winding 5 is connected to the direct input of the adder 12, the inverse input of which is connected to the output of the current sensor 10 of the secondary winding 6, the output of the adder 12 through the allocation unit of module 13 is connected to the first input of the comparison unit 15, the second input of which is connected to the output of the unit for setting the magnetizing current setting 14, the output of the comparison
  • the voltage of the electric energy source U Titan CT (Fig. 3 Hz)
  • inductance 2 and inverter 3 is applied to the primary winding 5 of transformer 4, causing a magnetizing current ⁇ ⁇ in it (Fig. .Z a 2 ), which calculates the adder 12 as the difference of the signals of the current sensors 9 and 10, included respectively in the primary 5 and secondary 6 windings transformer 4.
  • the node calculation module 13 selects the absolute value (module) of the magnetization current [ ⁇ ⁇ ] (Fig. 3 a 3 ).
  • the magnetizing current module reaches the set current value generated by the magnetization current setting unit 14 and the comparison unit 15 generates a pulse (Fig.
  • the counting trigger 16 changes its state (Fig. 3 a 5 ).
  • the inverter 3 changes the polarity of the voltage at the input winding 5 of the transformer 4 (Fig. 3 a and then the processes are repeated.
  • the operation of the device is similar to that described above (Fig. H), except that the voltage on the transformer 4 is determined by the voltage on the arc gap of the electrode 7 - product 8 (Fig. H), so the duration of the forward and reverse polarity current will be set according to the voltage direct and straight and reverse polarity and 0bR.
  • the device of figure 1 in all operating modes from idle to short circuit ensures the operation of the transformer 4 in a symmetrical forward predetermined magnetization reversal cycle and eliminates the transient at the time of first switching on, which allows to optimize the dimensions and weight of the transformer and inverter, and also increases the reliability of the device as a whole.
  • the use of the proposed technical solution made it possible to ensure optimal operating conditions of the transformer when operating on an asymmetric load, including when welding aluminum and its alloys with a non-consumable electrode in a medium shielding gases with an alternating current of rectangular shape when automatically reaching the optimum technologically significant ratio of the duration of the forward and reverse currents, optimize the number of device elements and reduce losses by reducing the number of electrical energy conversions, facilitate arc ignition conditions and stabilize arc reignition, simplify the design and reduce costs labor for manufacturing.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Arc Welding Control (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un procédé et un dispositif de soudage à l'arc par un courant à impulsions carrées; elle peut s'utiliser pour souder l'aluminium et ses alliages avec une électrode non fusible dans un milieu de gaz de protection. La charge est branchée directement sur les sorties de l'enroulement secondaire du transformateur. La formation du signal de commutation des transistors de l'inverseur s'effectue en fonction de la valeur absolue du courant de magnétisation du transformateur, calculée comme une différence des courants du premier et du deuxième enroulements du transformateur. Une unité de commande de l'inverseur comprend un additionneur, une unité d'extraction de module, une unité de réglage du courant de magnétisation, une unité comparatrice et un déclencheur à calcul. Les sorties des capteurs de courant des premier et deuxième enroulements du transformateur sont connectées aux entrées de l'additionneur dont la sortie est reliée via l'unité d'extraction du module à une première unité comparatrice. La deuxième entrée de l'unité comparatrice est reliée à la sortie de l'unité de réglage du courant de magnétisation, la sortie de l'unité comparatrice étant reliée à l'entrée du déclencheur de calcul dont les sorties directe et à inversion sont reliées aux entrées de commande des transistors de l'inverseur de courant. Les sorties de l'enroulement secondaire du transformateur sont reliées à l'électrode et au dispositif. L'invention permet d'augmenter l'efficacité énergétique du dispositif et sa fiabilité grâce à la diminution du nombre de conversions d'énergie électrique et à la simplification de la structure tout en assurant les régimes optimaux de soudage.
PCT/RU2012/000466 2011-07-19 2012-06-15 PROCÉDÉ DE COMMANDE D'UN INVERSEUR DE COURANT AUTONOME À SORTIE DE TRANSFORMATION UTILISÉ POUR LE SOUDAGE À L'ARC PAR UN COURANT À IMPULSIONS CARRÉES ET DISPOSITIF DE SA MISE EN œUVRE Ceased WO2013012356A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2011130042/02A RU2481929C2 (ru) 2011-07-19 2011-07-19 Способ управления дуговой сваркой изделий неплавящимся электродом в среде защитных газов и устройство для его осуществления
RU2011130042 2011-07-19

Publications (1)

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WO2013012356A1 true WO2013012356A1 (fr) 2013-01-24

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RU (1) RU2481929C2 (fr)
WO (1) WO2013012356A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4453073A (en) * 1980-12-22 1984-06-05 Crucible Societe Anonyme High frequency welding apparatus
SU1355401A1 (ru) * 1986-04-01 1987-11-30 Вильнюсский Инженерно-Строительный Институт Источник питани дуги переменным током
JPH01162573A (ja) * 1987-12-18 1989-06-27 Hitachi Seiko Ltd アーク溶接電源
RU2311996C1 (ru) * 2006-05-17 2007-12-10 Государственное образовательное учреждение высшего профессионального образования "Мордовский государственный университет им. Н.П. Огарева" Способ дуговой сварки и устройство для его осуществления

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1400815A1 (ru) * 1986-04-03 1988-06-07 Уфимский авиационный институт им.Серго Орджоникидзе Устройство дл электродуговой сварки
RU2239526C1 (ru) * 2003-02-03 2004-11-10 Логинов Валерий Юрьевич Способ управления процессом сварки и устройство для его осуществления (варианты)

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4453073A (en) * 1980-12-22 1984-06-05 Crucible Societe Anonyme High frequency welding apparatus
SU1355401A1 (ru) * 1986-04-01 1987-11-30 Вильнюсский Инженерно-Строительный Институт Источник питани дуги переменным током
JPH01162573A (ja) * 1987-12-18 1989-06-27 Hitachi Seiko Ltd アーク溶接電源
RU2311996C1 (ru) * 2006-05-17 2007-12-10 Государственное образовательное учреждение высшего профессионального образования "Мордовский государственный университет им. Н.П. Огарева" Способ дуговой сварки и устройство для его осуществления

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Publication number Publication date
RU2481929C2 (ru) 2013-05-20
RU2011130042A (ru) 2013-01-27

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