WO2022004218A1 - Procédé de soudage à l'arc en courant alternatif - Google Patents

Procédé de soudage à l'arc en courant alternatif Download PDF

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Publication number
WO2022004218A1
WO2022004218A1 PCT/JP2021/020475 JP2021020475W WO2022004218A1 WO 2022004218 A1 WO2022004218 A1 WO 2022004218A1 JP 2021020475 W JP2021020475 W JP 2021020475W WO 2022004218 A1 WO2022004218 A1 WO 2022004218A1
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current
value
current value
welding
less
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PCT/JP2021/020475
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English (en)
Japanese (ja)
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健太 玉川
英樹 井原
芳行 田畑
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パナソニックＩｐマネジメント株式会社
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Priority to JP2022533750A priority Critical patent/JPWO2022004218A1/ja
Priority to CN202180042774.9A priority patent/CN115702055A/zh
Publication of WO2022004218A1 publication Critical patent/WO2022004218A1/fr

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    • 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
    • B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
    • B23K9/073—Stabilising the arc

Definitions

  • the present disclosure relates to an AC arc welding method in which an arc is generated between an electrode and a base metal by an AC welding current to perform welding.
  • Patent Document 1 discloses an AC arc welding method in which an arc is generated between an electrode and a base metal by an AC welding current to perform welding.
  • the waveform of the welding current is a waveform obtained by superimposing a pulse on the alternating current of a square wave so that the arc directivity can be maintained even if the time ratio of the electrode minus period is reduced. ..
  • the waveform of the welding current is a waveform obtained by superimposing a pulse on the alternating current of a square wave
  • the welding current is rapidly increased.
  • High work noise is generated, and the burden on the worker becomes heavy.
  • the welding current is lowered from a positive value to a negative value, the same problem arises due to the rapid decrease in the welding current.
  • the waveform of the welding current is made into a sine and cosine in order to suppress the generation of high work noise, the melting of the base metal will be delayed and the work efficiency will deteriorate.
  • This disclosure has been made in view of this point, and the purpose of the present disclosure is to reduce the work noise while suppressing the deterioration of the welding work efficiency.
  • the first aspect of the present disclosure is an AC arc welding method in which an arc is generated between an electrode and a base metal by an AC welding current to perform welding, in which the welding current is negative at the first inclination.
  • the value is increased from the value to a second current value of 0.6 times or more and 0.9 times or less of the predetermined positive first current value, and then 60 ⁇ A / ⁇ s or more, which is smaller than the first gradient from the second current value.
  • the welding current rise step when executed, when the welding current is increased from a negative value to the first current value, from the time when the welding current reaches the second current value to the time when the welding current reaches the first current value.
  • the welding current is increased at a second inclination of 600 mA / ⁇ s or less, so that the working noise can be lowered as compared with the case where the welding current is increased at an inclination of more than 600 mA / ⁇ s.
  • the welding current rise step when the welding current is increased from a negative value to the first current value, the welding current is set to be smaller than the second slope until the welding current reaches the second current value. Since the current is increased with a large first inclination, the base metal can be melted faster and the work efficiency can be improved as compared with the case of increasing with the second inclination.
  • the second current value is 0.6 times or more the first current value, so that the second current value is less than 0.6 times the first current value.
  • the base metal can be melted faster, the work efficiency can be improved, the period when the welding current is small can be shortened, and the arc breakage can be less likely to occur.
  • the second current value is 0.9 times or less of the first current value, the period during which the work noise is lower than when the second current value is larger than 0.9 times the first current value is set. You can make it longer.
  • the welding current reduction step when the welding current is reduced from the positive value to the third current value, the welding current reaches the fourth current value and the third current value. Since the welding current is decreased at the fourth inclination of ⁇ 600 mA / ⁇ s or more, the working noise can be lowered as compared with the case of increasing at the inclination of less than ⁇ 600 mA / ⁇ s.
  • the welding current when the welding current is reduced from the positive value to the third current value, the welding current is set to be smaller than the fourth slope until the welding current reaches the fourth current value. Since the current is reduced by a small third tilt, arc breakage can be less likely to occur as compared with the case where the current is reduced by a fourth tilt.
  • the fourth current value is 0.6 times or less of the third current value, so that the fourth current value is larger than 0.6 times the third current value. Compared with this, the period during which the absolute value of the welding current is small can be shortened, and arc breakage can be less likely to occur. Further, since the 4th current value is 0.9 times or more the 3rd current value, the period during which the work noise is low is longer than when the 4th current value is less than 0.9 times the 3rd current value. can.
  • the second aspect of the present disclosure is an AC arc welding method in which an arc is generated between the electrode and the base metal by an AC welding current to perform welding, and the welding current is applied to a predetermined value only during the first pulse period.
  • the first peak current application step in which the current value is 1.15 times or more and 1.6 times or less the positive set current value, and the welding current is 0.6 times or more and 0 times the set current value for the second pulse period.
  • the first base current application step with a current value of 9 times or less is alternated two or more times between the time when the welding current is increased from a negative value to a positive value and the time when the welding current is decreased from a negative value to the next negative value.
  • the welding current is negative from a positive value. It is characterized in that the second pulse current application step, which is alternately executed once, is executed between the time when the value is lowered to the value of 1 and the time when the value is raised to the next positive value.
  • the first peak current application step a large amount of heat for melting the filler rod is given to the filler rod, and the output directivity of the arc is enhanced by increasing the electromagnetic pinch force, so that the droplets are smooth. Since the transition can be promoted, the melting rate can be increased as compared with the case where the welding current is always set to the set current value. Further, even if the welding current is made larger than the set current value in the first peak current applying step, the welding current is made smaller than the set current value in the first base current applying step, so that the first pulse current applying step is being executed. The effective value of the welding current in can be brought close to the set current value.
  • the arc output directivity is increased by increasing the electromagnetic pinch force in the second peak current application step, and the welding current is always set to the set current value as compared with the case where the welding current is always set to the set current value.
  • the cleaning action can be promoted.
  • the welding current is made smaller than -1 times the set current value in the second peak current applying step, the welding current is made larger than -1 times the set current value in the second base current applying step.
  • the effective value of the welding current during the execution of the 2-pulse current application step can be made close to -1 times the set current value.
  • the melting rate can be more effectively increased as compared with the case where the first peak current application step is executed only once.
  • the third pulse period can be lengthened as compared with the case where the second peak current application step and the second base current application step are executed twice or more. Therefore, since the cleaning period can be lengthened with a current value smaller than -1 times the set current value, the oxide on the surface of the base metal can be firmly removed. Further, even when the period for making the welding current a negative value is set to a small ratio of less than 50% in one cycle, the second peak current application step and the second base current application step are executed twice or more, respectively. Since the third pulse period and the fourth pulse period can be lengthened as compared with the above, it is possible to prevent the third pulse period and the fourth pulse period from becoming too short and difficult to control.
  • FIG. 1 is a diagram showing a schematic configuration of a welding apparatus.
  • FIG. 2 is a circuit diagram of a welding power supply.
  • FIG. 3 is a diagram showing a waveform of a welding current during arc welding.
  • FIG. 1 shows a welding device 1.
  • the welding device 1 includes a welding torch 10 and a welding power source 20.
  • This welding device 1 is an AC TIG welding device in which the welding torch 10 is a non-consumable electrode type torch.
  • the welding torch 10 has a nozzle 11 for ejecting a shield gas SG supplied from a gas supply device (not shown). Inside the nozzle 11, a substantially cylindrical collet 12 is arranged along the ejection direction of the nozzle 11. A rod-shaped tungsten electrode TE is fixed inside the collet 12.
  • the welding power supply 20 generates an arc A by applying an AC voltage between the tungsten electrode TE of the welding torch 10 and the base metal W.
  • the worker forms a molten pool P in the base metal W by generating an arc A between the tungsten electrode TE and the base metal W by the welding device 1, and the filler rod R is placed in the molten pool P. By inserting, a weld bead can be formed.
  • the welding power supply 20 includes a first rectifying smoothing circuit 21, a first inverter circuit 22, a first transformer 23, a second rectifying smoothing circuit 24, and a first.
  • the second reactors 25 and 26, the second inverter circuit 27, and the control device 30 are provided.
  • the first rectifying smoothing circuit 21 converts the input AC power input from the commercial power supply 2 into DC power and outputs it.
  • the first inverter circuit 22 is, for example, a single-phase full-bridge type PWM control inverter, and includes four switching elements (not shown).
  • the first inverter circuit 22 switches these four switching elements according to the switching signal SG1 output by the control device 30, so that the DC power output by the first rectifying smoothing circuit 21 becomes AC power. Convert and output.
  • the output voltage of the first inverter circuit 22 is taken as the first AC voltage.
  • an inverter circuit having another configuration such as a half-bridge type inverter may be used.
  • the first transformer 23 changes the first AC voltage output by the first inverter circuit 22 to the second AC voltage and outputs it.
  • the first transformer 23 has a first primary coil 23a and a first secondary coil 23b.
  • a first AC voltage output by the first inverter circuit 22 is applied to the first primary coil 23a.
  • the voltage of the first secondary coil 23b becomes the second AC voltage.
  • the second rectifying smoothing circuit 24 converts the second AC voltage output by the first transformer 23 into the first DC voltage and outputs it from the positive output terminal 24a and the negative output terminal 24b.
  • the second rectifying smoothing circuit 24 is a diode bridge circuit composed of four diodes 24c.
  • the second inverter circuit 27 is a single-phase half-bridge type inverter circuit.
  • the second inverter circuit 27 includes an upper arm switching element 273 and a lower arm switching element connected in series between the first and second input terminals 271,272 and the first and second input terminals 271,272. It is equipped with 274.
  • the polarity switching signal SG2 output by the control device 30 is input to the upper arm switching element 273, while the signal obtained by inverting the polarity switching signal SG2 is input to the lower arm switching element 274.
  • the first input terminal 271 of the second inverter circuit 27 is connected to the positive output terminal 24a of the second rectifying smoothing circuit 24 via the first reactor 25.
  • the second input terminal 272 of the second inverter circuit 27 is connected to the negative output terminal 24b of the second rectifying smoothing circuit 24 via the second reactor 26.
  • the output terminal 275 of the second inverter circuit 27 is connected to the base material W.
  • the second inverter circuit 27 sets the base material W to a higher potential than the tungsten electrode TE, while the upper arm switching element. With the 273 turned off and the lower arm switching element 274 turned on, the second inverter circuit 27 sets the base material W to a lower potential than the tungsten electrode TE.
  • the second inverter circuit 27 can be applied between the base material W and the tungsten electrode TE.
  • the polarity of the AC voltage is set to the EN (electrode minus) polarity at which the tungsten electrode TE has a lower potential than the base material W and the EP (electrode plus) polarity at which the tungsten electrode TE has a higher potential than the base material W. Switch periodically. As a result, an alternating current welding current flows between the base metal W and the tungsten electrode TE.
  • the control device 30 controls the welding current I.
  • a predetermined positive first current value I1 is input to the control device 30 by the user using an input means (not shown), and is set as a set current value.
  • the control device 30 is a first inverter circuit 22 so that the effective value of the welding current I becomes the set current value by PWM control based on the measured value of the welding current I input from the current sensor (not shown).
  • the polarity switching signal SG2 for switching the polarity of the AC voltage applied between the electrode TE and the base material W is output.
  • the welding current I is controlled by the control device 30 by the outputs of the switching signal SG1 and the polarity switching signal SG2.
  • the frequency of the polarity switching signal SG2, that is, the frequency of the welding current is set to 10 Hz or more and 400 Hz or less.
  • the control device 30 sets the welding current to a second current value I2 which is (1- ⁇ ) times the positive first current value I1 from a negative value at the first slope S1 of 1.7 A / ⁇ s. Then, from the second current value I2 to the first slope S1 with a second slope S2 of 60 ⁇ A / ⁇ s or more and 600 mA / ⁇ s or less, which is smaller than the first slope S1, the first slope period SPE1 is applied to the first current value I1. And perform a current rise step to increase.
  • the ⁇ is set to 0.1 or more and 0.4 or less. Therefore, the second current value I2 is 0.6 times or more and 0.9 times or less the first current value I1.
  • the welding current is increased from the second current value I2 to the first current value I1 with a second inclination S2 of 600 mA / ⁇ s or less.
  • the work noise can be lowered and the worker can be given a softer feeling.
  • the base material W can be melted faster than when it is less than 60 ⁇ A / ⁇ s.
  • the welding current is increased from the negative value to the second current value I2 at the first inclination S1 of 1 A / ⁇ s or more, so that the base metal is increased as compared with the case where the welding current is increased at the second inclination S2.
  • the melting of W can be accelerated and the work efficiency can be improved.
  • the base material W has a base material W as compared with the case where the second current value I2 is less than 0.6 times the first current value I1. It is possible to speed up melting, improve work efficiency, shorten the period when the welding current is small, and prevent arc breakage. Further, since the second current value I2 is 0.9 times or less the first current value I1, the work noise is higher than when the second current value I2 is larger than 0.9 times the first current value I1. You can lengthen the period of low.
  • the control device 30 raises the welding current to the first peak current value P1 which is (1 + ⁇ / 2 + ⁇ ) times the first current value I1, and the first peak current value only for the first pulse period PPE1.
  • the first peak current application step set to P1 and the welding current are lowered to the first base current value B1 which is (1- ⁇ ) times the first current value I1, and the first base current value B1 is applied only for the second pulse period PPE2.
  • the first pulse current application step is executed by alternately executing the first base current application step twice in order.
  • the above ⁇ is set to 0.1 or more and 0.4 or less. Therefore, the first peak current value P1 is 1.15 times or more and 1.6 times or less the first current value I1, and the first base current value B1 is 0.6 times or more and 0.9 times the first current value I1. It will be less than double.
  • the welding current is set to the first peak current value P1 which is larger than the first current value I1, so that a large amount of heat for melting the filler rod R is given to the filler rod R.
  • the output directivity of the arc A can be enhanced and the smooth transition of the droplets can be promoted. Therefore, the melting rate can be increased as compared with the case where the welding current is always set to the set current value (first current value I1).
  • the effective value of the welding current during the execution of the first pulse current application step is set to the set current value. You can get closer.
  • the melting rate can be effectively increased as compared with the case where it is set to less than 0.1.
  • ⁇ is set to 0.4 or less, the arc A is suppressed from becoming too strong in the first peak current application step as compared with the case where it is set to be larger than 0.4, and the tungsten electrode TE is consumed. It can be slowed down and the burden on the operator can be reduced.
  • the control device 30 raises the welding current from the first base current value B1 to the first current value I1. Then, the control device 30 adjusts the welding current from the first current value I1 to a slope -1 times that of the second slope S2, that is, a slope of ⁇ 60 ⁇ A / ⁇ s or less and ⁇ 600 mA / ⁇ s or more ⁇ S2, and the first tilt period SPE1.
  • a current reduction step of reducing the current by the DPE for a reduction period of 0.35 times or more and 0.95 times or less is performed.
  • the control device 30 applies the welding current to the first current value only for the start-up period RPE of 0.05 times or more and 0.65 times or less of the first inclination period SPE1.
  • the positive rising current value RI 1.0 times or more and 1.65 times or less of I1 is used.
  • the welding current is made smaller than the first current value I1 in the first inclination period SPE1 and the decreasing period DPE, even if the welding current is made larger than the first current value I1 in the first peak current application step.
  • the effective value of the welding current during the period when the welding current is positive can be brought close to the set current value (first current value I1).
  • the control device 30 lowers the welding current at the timing tE. Specifically, the control device 30 has a third slope S3 of -1.7 A / ⁇ s, and a fourth current value I4 which is (1- ⁇ ) times the negative third current value I3 from the positive rising current value RI. Then, from the fourth current value I4 to the third slope S3, which is larger than the third slope S3 and has a fourth slope S4 of -60 ⁇ A / ⁇ s or less and -600 mA / ⁇ s or more, the second slope period SPE2. Perform a current reduction step to reduce.
  • the third current value I3 is a value -1 times the first current value I1 (set current value).
  • the above ⁇ is set to 0.1 or more and 0.4 or less. Therefore, the fourth current value I4 is 0.6 times or less and 0.9 times or more the third current value I3.
  • the current reduction step is executed, and immediately before the welding current is reduced from a positive value to a negative value.
  • the welding current is once started up to the start-up current value RI.
  • the welding current is set from a current value lower than the set current value (first current value I1) to 1.0 times or more and 1.65 times or less the first current value I1. Since the current is raised to the rising current value RI once, the third inclination S3 becomes steeper (smaller) and arc breakage is less likely to occur as compared with the case where the welding current is lowered to a negative value immediately after the current reduction step is executed. ..
  • the welding current may not be raised to the rising current value RI once, but the welding current may be lowered to a negative value.
  • the reduction period DPE may be set to 0.95 times or more and 1 times or less the first inclination period SPE1.
  • the welding current is decreased from the fourth current value I4 to the third current value I3 at the fourth inclination S4 of ⁇ 600 mA / ⁇ s or more, so that the welding current is increased at an inclination of less than ⁇ 600 mA / ⁇ s.
  • the work noise can be lowered and the worker can be given a softer feeling.
  • the fourth slope S4 is set to -60 ⁇ A / ⁇ s or less, arc breakage can be less likely to occur as compared with the case where the slope exceeds -60 ⁇ A / ⁇ s.
  • the welding current is reduced from the positive value to the fourth current value I4 at the third slope S3 of -1A / ⁇ s or less, so that the arc is compared with the case where the welding current is reduced at the fourth slope S4. It can be less likely to break.
  • the fourth current value I4 is 0.6 times or less and 0.9 times or more the third current value I3, compared with the case where the fourth current value I4 is larger than 0.6 times the third current value I3. , The period during which the absolute value of the welding current is small can be shortened, and arc breakage can be less likely to occur. Further, as compared with the case where the fourth current value I4 is less than 0.9 times the third current value I3, the period during which the work noise is low can be lengthened.
  • the control device 30 lowers the welding current to the second peak current value P2, which is (1 + ⁇ + ⁇ ) times the third current value I3, and the second peak current value P2 only for the third pulse period PPE3.
  • the welding current is raised to the second base current value B2, which is (1- ⁇ ) times the third current value I3, and the second base current value B2 is applied only during the fourth pulse period PPE4.
  • the second pulse current application step is executed, in which the second base current application step is alternately executed only once.
  • the above ⁇ is set to 0.1 to 0.4.
  • the second peak current value P2 is 1.2 times or less and 1.8 times or more the third current value I3, that is, -1.2 times or less and 1.8 times the set current value (first current value I1). That is all.
  • the second base current value B2 is 0.6 times or less and 0.9 times or more the third current value I3, that is, -0.6 times or less and -0.9 times or more the set current value (first current value I1). Become.
  • the welding current is set to the second peak current value P2, which is smaller than the third current value I3, so that the output directivity of the arc A can be enhanced by increasing the electromagnetic pinch force. Therefore, the cleaning action can be promoted as compared with the case where the welding current is always set to the third current value I3 (-1 times the set current value).
  • the second peak current value P2 is set independently of the first peak current value P1 according to the degree of cleaning action required.
  • the welding current is set to the second base current value B2, which is larger than the third current value I3. Therefore, the effective value of the welding current during the execution of the second pulse current application step is the set current value. It can be approached by -1 times.
  • the control device 30 lowers the welding current from the second base current value B2 to the third current value I3. Then, the control device 30 adjusts the welding current from the third current value I3 to a slope -1 times that of the fourth slope S4, that is, a slope of 60 ⁇ A / ⁇ s or more and 600 mA / ⁇ s or less, and 0.35 of the second slope period SPE2.
  • a current increase step of increasing by IPE for an increase period of doubling or more and 0.95 times or less is performed.
  • the control device 30 applies the welding current to the third current value only for the fall period FPE of 0.05 times or more and 0.65 times or less of the second inclination period SPE2.
  • the falling current value FI is 1.0 times or less and 1.65 times or more of I3, and then the operation from the timing tA is repeated. That is, the control device 30 raises the welding current from the falling current value FI to the positive second current value I2 at the first inclination S1 of 1.7 A / ⁇ s.
  • the current increase step is executed, and immediately before the welding current is increased from a negative value to a positive value.
  • the welding current is temporarily reduced to the falling current value FI.
  • the welding current is changed from a current value higher than -1 times the set current value to a falling current value 1.0 times or less and 1.65 times or more the third current value I3. Since the current is once lowered to FI, the first inclination S1 becomes steeper (larger) and arc breakage is less likely to occur as compared with the case where the welding current is raised to a positive value immediately after the execution of the current increase step.
  • the welding current may be lowered to a positive value without temporarily dropping to the current value FI.
  • the increase period IPE may be set to 0.95 times or more and 1 times or less the second slope period SPE2.
  • the welding current is made larger than the third current value I3, so that the welding current is made smaller than the third current value I3 in the second peak current application step. Also, the effective value of the welding current during the period when the welding current is negative can be brought close to -1 times the set current value (third current value I3).
  • the period from the timing tA to the next timing tE that is, the period in which the polarity of the AC voltage applied between the base metal W and the tungsten electrode TE in one cycle T becomes the EN polarity is set to EN ( Electrode minus) Period Ten is called.
  • the period from the timing tE to the next timing tA that is, the period in which the polarity of the AC voltage applied between the base material W and the tungsten electrode TE in one cycle T becomes the EP polarity is EP (electrode). Plus) Called period Tep.
  • the EN period Ten is set to 90 to 50% of one cycle T, and the EP period Tep is set to 10 to 50% of one cycle T. In the example of FIG. 3, the EN period Ten and the EP period Tep are each set to 50% of one cycle.
  • the first gradient period SPE1, each first pulse period PPE1, and each second pulse period PPE2 are set to about 1/6 of the EN period Ten.
  • the sum of the reduction period DPE and the start-up period RPE is also set to about 1/6 of the EN period Ten. Since the frequency of the welding current is set to 10 to 400 Hz, the total of the first inclination period SPE1, each first pulse period PPE1, each second pulse period PPE2, the decrease period DPE and the start-up period RPE is , 200 ⁇ s or more and 15 ms or less, respectively.
  • the second slope period SPE2, the third pulse period PPE3, and the fourth pulse period PPE4 are set to about 1/4 of the EP period Tep.
  • the sum of the increase period IPE and the start-up period FPE is also set to about 1/4 of the EP period Tep. Since the frequency of the welding current is set to 10 to 400 Hz, the sum of the second inclination period SPE2, the third pulse period PPE3, the fourth pulse period PPE4, the increase period IPE and the fall period FPE, respectively. It will be 60 ⁇ s or more and 12.5 ms or less.
  • the start-up period RPE and the start-up period FPE are set to 160 ⁇ s to 620 ⁇ s when the frequency is 10 Hz to 600 Hz.
  • the first peak current application step and the first base current application step are performed twice between the execution of the current rise step and the next reduction of the welding current to a negative value. Since it is executed, the melting rate can be increased more effectively than when it is executed only once.
  • the third pulse period PPE3 for maintaining the welding current at the second peak current value P2 can be lengthened as compared with the case where the welding current is executed more than once. Therefore, since the cleaning period can be lengthened at the second peak current value P2, the oxide on the surface of the base material W can be firmly removed. Further, even when the EP period Tep is set to a small ratio of less than 50% of one cycle T, 1 is compared with the case where the second peak current application step and the second base current application step are executed twice or more. Since one third pulse period PPE3 and one fourth pulse period PPE4 can be lengthened, it is possible to prevent the third pulse period PPE3 and the fourth pulse period PPE4 from becoming too short and difficult to control.
  • each first pulse period PPE1 is set to about 1/6 of the EN period Ten, but it may be set to another ratio of 1/30 or more and 1/6 or less.
  • each second pulse period PPE2 is set to about 1/6 of the EN period Ten, but it may be set to another ratio of 1/6 or more and 3/10 or less.
  • each third pulse period PPE3 is set to about 1/4 of the EP period Tep, but it may be set to another ratio of 1/20 or more and 1/4 or less.
  • each fourth pulse period PPE4 is set to about 1/4 of the EP period Tep, but it may be set to another ratio of 1/4 or more and 9/20 or less.
  • the welding current is set to the common first peak current value P1 in the two first peak current application steps executed in the first pulse current application step, but 1.15 times the set current value. As long as the current values are 1.6 times or more, the current values may be different from each other.
  • the welding current is set to the common first base current value B1, but the set current value is 0.6 times or more and 0.9. If the current values are double or less, the current values may be different from each other.
  • control device 30 executes both the current rise step and the current fall step, and both the current decrease step and the current increase step, but only the current rise step and the current decrease step are executed.
  • the current lowering step and the current increasing step may not be executed.
  • only the current lowering step and the current increasing step may be executed, and the current rising step and the current decreasing step may not be executed.
  • control device 30 raises the welding current to the rising current value RI immediately after executing the current decrease step, and lowers the welding current to the rising current value FI after executing the current increasing step. You may want to execute only one of the above.
  • control device 30 has executed the first peak current applying step and the first base current applying step twice, but may be executed three times or more.
  • the AC arc welding method of the present disclosure can reduce the work noise while suppressing deterioration of welding work efficiency, and AC arc welding is performed by generating an arc between the electrode and the base metal by the AC welding current. It is useful as a method.

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  • Arc Welding Control (AREA)

Abstract

La présente invention consiste à amener un dispositif de soudage à exécuter: une étape d'élévation de courant dans laquelle un courant de soudage est augmenté, selon une première pente (S1), d'une valeur négative à une seconde valeur de courant (I2) qui est 0,6-0,9 (inclus) fois une première valeur de courant positive prescrite (I1), puis est augmenté de la deuxième valeur de courant (I2) à la première valeur de courant (I1) selon une deuxième pente (S2) allant de 60 μΑ/µs à 600 mA/µs (inclus), la deuxième pente (S2) étant inférieure à la première pente (S1); et une étape de diminution de courant dans laquelle le courant de soudage est réduit, selon une troisième pente (S3), d'une valeur positive à une quatrième valeur de courant (I4) qui est 0,6-0,9 (inclus) fois une troisième valeur de courant négative prescrite (I3), puis est réduit de la quatrième valeur de courant (I4) à la troisième valeur de courant (I3) selon une quatrième pente (S4) de -60 μΑ/μS à -600 mA/µs (inclus), la quatrième pente (S4) étant supérieure à la troisième pente (S3).
PCT/JP2021/020475 2020-06-30 2021-05-28 Procédé de soudage à l'arc en courant alternatif WO2022004218A1 (fr)

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JP2022533750A JPWO2022004218A1 (fr) 2020-06-30 2021-05-28
CN202180042774.9A CN115702055A (zh) 2020-06-30 2021-05-28 交流电弧焊接方法

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JP2020112872 2020-06-30

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003048069A (ja) * 2001-08-01 2003-02-18 Daihen Corp 交流ティグ溶接の出力制御方法
JP2005028383A (ja) * 2003-07-09 2005-02-03 Daihen Corp 交流ｔｉｇ溶接の電流制御方法
JP2006102813A (ja) * 2004-10-06 2006-04-20 Lincoln Global Inc 芯入り電極使用の交流溶接方法
JP2008253997A (ja) * 2007-03-12 2008-10-23 Daihen Corp 消耗電極交流アーク溶接のくびれ検出制御方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003048069A (ja) * 2001-08-01 2003-02-18 Daihen Corp 交流ティグ溶接の出力制御方法
JP2005028383A (ja) * 2003-07-09 2005-02-03 Daihen Corp 交流ｔｉｇ溶接の電流制御方法
JP2006102813A (ja) * 2004-10-06 2006-04-20 Lincoln Global Inc 芯入り電極使用の交流溶接方法
JP2008253997A (ja) * 2007-03-12 2008-10-23 Daihen Corp 消耗電極交流アーク溶接のくびれ検出制御方法

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JPWO2022004218A1 (fr) 2022-01-06

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