WO2016163073A1 - アーク溶接制御方法 - Google Patents

アーク溶接制御方法 Download PDF

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Publication number
WO2016163073A1
WO2016163073A1 PCT/JP2016/001425 JP2016001425W WO2016163073A1 WO 2016163073 A1 WO2016163073 A1 WO 2016163073A1 JP 2016001425 W JP2016001425 W JP 2016001425W WO 2016163073 A1 WO2016163073 A1 WO 2016163073A1
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Prior art keywords
welding
current
arc
melting
value
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PCT/JP2016/001425
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English (en)
French (fr)
Japanese (ja)
Inventor
昂裕 野口
海斗 松井
篤寛 川本
将 古和
Original Assignee
パナソニックＩｐマネジメント株式会社
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2017511456A priority Critical patent/JP6596675B2/ja
Priority to CN201680008189.6A priority patent/CN107206528B/zh
Publication of WO2016163073A1 publication Critical patent/WO2016163073A1/ja

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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 invention relates to an arc welding control method for performing welding by generating an arc between a welding wire that is a consumable electrode and a base material that is a workpiece.
  • arc welding in which an arc is generated between the welding wire and the base metal and welding is performed, when the critical current value is exceeded, the form of transfer of the droplet generated by melting the welding wire is spray transfer.
  • a welding method that is performed by alternately repeating a peak current higher than the critical current value and a base current lower than the critical current value for maintaining the arc is called a pulse arc welding method, which is lower than the direct current spray transfer welding.
  • the spray transfer can be performed with an average current.
  • the arc is maintained during the base current period in which the base current flows.
  • the droplet transfer is performed during a base current period in which the arc force is least affected by the arc force. Therefore, it is possible to greatly reduce spatter.
  • the pulse arc welding method is restricted by the composition of the shielding gas.
  • the proportion of carbon dioxide in the shield gas exceeds 30%, the effect of reducing spatter becomes weak.
  • the cost of the shielding gas increases. Therefore, there is a demand for an arc welding method capable of stable spray transfer welding using a shielding gas containing carbon dioxide as a main component.
  • spatter when spatter occurs, it adheres to the base material, and especially when spatter adheres to the movable part of the product that operates, it limits the movable range of the product and significantly reduces the product value. For this reason, another process for removing spatters is required, which significantly reduces welding productivity.
  • FIG. 6 shows an arc portion 501, a welding voltage, and a welding current waveform in the conventional pulsed arc welding control method disclosed in Patent Document 1.
  • constant current pulse control is performed using a shield gas containing carbon dioxide as a main component.
  • the output of the peak current Ip is started and the peak time Tp is started.
  • the tip 519P of the welding wire 519 starts to melt from the melting start point t501.
  • the droplet 523 grows from the tip 519P of the welding wire 519, a constriction 523A is generated between the tip 519P of the welding wire 519 and the droplet 523, and the droplet 523 becomes the tip 519P.
  • the droplet 523 is detached from the welding wire 519 at the droplet separation point t503, and the separation of the droplet 523 is completed.
  • the droplet separation point t503 is repeated from the melting start point t501.
  • the arc length which is the length of the arc 517, is increased in a short time, so that the welding voltage is sharply increased. Therefore, when the welding voltage V exceeds a predetermined voltage threshold value or by detecting that the amount of change (dV / dt) per unit time of the welding voltage V exceeds a predetermined value, The separation of 523 from the welding wire 519 can be detected.
  • the value of the welding current I is reduced from the peak current Ip to a predetermined reduction current Ir lower than the peak current Ip, thereby preventing the occurrence of sputtering. Thereafter, the welding current I is maintained at the reduction current Ir during the decrease time TM, and after the decrease time TM has elapsed, the welding current I is increased to the original peak current Ip to melt the tip portion 519P of the welding wire 519.
  • the base current Ib starts to be output, and the base time Tb is started.
  • Patent Document 2 discloses an arc welding control method in which short-circuit arc welding is performed by repeating a short-circuit period and an arc period, and as a method for controlling voltage fluctuation in voltage control, an inductance value by electronic reactor control is adjusted during the arc period. Is disclosed.
  • the arc welding control method of constant voltage control in the spray transfer state uses an arc welding apparatus that outputs a welding current to the welding wire.
  • the welding current is curved to have a minimum value in the peak current when the droplet formed by melting the welding wire separates from the welding wire and the concave shape when starting and promoting the melting of the welding wire.
  • the arc welding apparatus is controlled to repeat a continuously changing melting current.
  • the arc welding apparatus may be controlled so that the peak current and the melting current fall within a predetermined range.
  • This arc welding control method can reduce spatter and obtain a bead having a uniform width.
  • FIG. 1 is a schematic configuration diagram of an arc welding apparatus in the first embodiment.
  • FIG. 2 is a diagram showing an arc portion, a welding voltage, and a welding current of the arc welding apparatus in the first embodiment.
  • FIG. 3 is a diagram showing the current fluctuation width and transition period of the welding current of the arc welding apparatus in the first embodiment.
  • FIG. 4 is a schematic configuration diagram of the arc welding apparatus in the second embodiment.
  • FIG. 5A is a diagram showing a relationship between a welding current and a welding voltage of the arc welding apparatus in the third embodiment.
  • FIG. 5B is a diagram showing a welding voltage and a welding current of the arc welding apparatus in the third embodiment.
  • FIG. 6 is a diagram showing an arc portion, a welding voltage, and a welding current in a conventional arc welding control method.
  • FIG. 1 is a schematic configuration diagram of an arc welding apparatus 101 according to the first embodiment.
  • the arc welding apparatus 101 includes an arc part 102.
  • FIG. 2 schematically shows the operation of the arc part 2.
  • FIG. 2 shows the welding voltage and welding current of the arc welding apparatus 101 together.
  • the arc welding apparatus 101 includes a primary rectification unit 2 that rectifies AC power input from an input power supply 1, a switching unit 3 that controls welding output, and an output from the switching unit 3 that is input to convert the power into a power suitable for welding.
  • the transformer 4 is provided.
  • the arc welding apparatus 101 includes a secondary rectification unit 5 that rectifies the secondary output of the transformer 4, a reactor 6 that smoothes the output of the secondary rectification unit 5, a drive unit 7 that drives the switching unit 3, and a welding current. It further includes a welding current detection unit 8 that detects I, a welding voltage detection unit 9 that detects a welding voltage V, and a droplet detachment detection unit 10. The droplet detachment detection unit 10 detects the detachment of the droplet 23 from the distal end portion 19P of the welding wire 19 based on the output of the welding voltage detection unit 9.
  • the arc welding apparatus 101 further includes a welding condition setting unit 14 and a storage unit 13.
  • the welding condition setting unit 14 has welding conditions such as the setting current Is of the welding current I, the setting voltage Vs of the welding voltage V, the feed amount of the welding wire 19, the type of shield gas, the type of the welding wire 19, and the diameter of the welding wire 19. Etc. are set.
  • the storage unit 13 includes various values such as a plurality of reactor values, peak currents Ip, melting currents Ig of the electronic reactor control respectively corresponding to information set by the welding condition setting unit 14 and a plurality of values of the feeding amount of the welding wire 19. The parameters are stored.
  • the arc welding apparatus 101 further includes an arc control unit 12 that outputs a signal for controlling a current and a voltage when the arc 17 is generated based on outputs from the welding voltage detection unit 9 and the storage unit 13.
  • the drive unit 7 controls the switching unit 3 based on the output of the arc control unit 12.
  • the welding wire 19 is fed by a wire feeding motor controlled by the wire feeding unit 20. Electric power for welding is supplied to the welding wire 19 via a tip 16 provided on the torch 15, and an arc 17 is generated between the welding wire 19 and the base material 18 to weld the base material 18. .
  • Each component constituting the arc welding apparatus 101 shown in FIG. 1 may be configured individually or in combination with a plurality of components.
  • the arc welding apparatus 101 performs welding voltage V and welding based on a set voltage Vs for setting the output of the welding voltage V and a set current Is for setting the output of the welding current I in arc welding with constant voltage control in a spray transition state.
  • the welding output including the current I is controlled.
  • FIG. 2 at the melting start point t ⁇ b> 1, the droplet 23 is detached from the tip portion 19 ⁇ / b> P of the welding wire 19 and the droplet 23 at the tip portion 19 ⁇ / b> P of the welding wire 19 starts to grow.
  • the welding current I reaches the peak current Ip.
  • the droplet 23 formed by melting the tip 19P of the welding wire 19 grows.
  • the welding voltage V depends on the arc length L17 of the arc 17.
  • the arc length L17 becomes shorter, and the resistance value between the welding wire 19 and the base material 18 becomes smaller, so the welding voltage V decreases.
  • the arc length L17 becomes longer again. Therefore, the resistance value between the welding wire 19 and the base material 18 is increased at the droplet separation point t3, and the welding voltage V is sharply increased accordingly.
  • the waveform of the welding voltage V is a sawtooth wave.
  • the welding current I alternately repeats the melting current Ig and the projecting peak current Ip. Specifically, the welding current I becomes the peak current Ip at the droplet separation point t3 when the droplet 23 is detached.
  • the melting current Ig continuously changes so as to have a minimum value IL by curving into a concave shape that starts and accelerates the melting of the welding wire 19.
  • the wire feed amount that is the speed at which the welding wire 19 is fed is determined by the set current.
  • a plurality of values of the wire feed amount derived experimentally in advance corresponding to a plurality of values of the set current are stored in the storage unit 13.
  • Welding control parameters respectively corresponding to a plurality of values of the wire feed amount are also stored in the storage unit 13.
  • the wire feed amount value corresponding to the set current value at which the spray transition state is sufficiently achieved is selected.
  • welding is performed based on a set voltage for setting the output of the welding voltage V and a set current for setting the output of the welding current I in arc welding with constant voltage control in a spray transition state. The output is controlled, and the peak current Ip having a protrusion when the droplet 23 is detached and the melting current Ig having a curved waveform continuously changing in a concave shape that starts and accelerates the melting of the welding wire 19 are obtained.
  • welding is performed by controlling the current fluctuation range It, which is the difference between the peak current Ip and the minimum curve IL of the melting current Ig, to be a predetermined value.
  • the current fluctuation width It is set so that the transition period Tt from when the droplet 23 is detached from the welding wire 19 and melting of the welding wire 19 to when the droplet 23 is separated from the welding wire 19 is within a predetermined range. adjust. In other words, the current fluctuation width It is adjusted such that the timing at which the droplet 23 is detached from the welding wire 19 is one separation / one cycle.
  • the current fluctuation width It is centered on the set current or the average value of the moving average of the welding current I over a predetermined period, in other words, within a range of ⁇ 25% to ⁇ 45% with respect to the welding current, more preferably ⁇ 25. % To ⁇ 30% or less.
  • the peak current Ip is greater than the average value of the welding current I by 25% or more and 45% or less of the average value of the welding current I
  • the minimum value IL of the melting current Ig is the average value of the welding current I.
  • the current fluctuation width It is controlled so that it is smaller than the average value of the welding current I by 25% or more and 45% or less.
  • the peak current Ip is larger than the average value of the welding current I by a value not less than 25% and not more than 30% of the average value of the welding current I, and the minimum value IL of the melting current Ig is the welding current.
  • the current fluctuation width It is controlled so that it is smaller than the average value of the welding current I by 25% or more and 30% or less of the average value of I.
  • the predetermined period for calculating the moving average is an integral multiple of the transition period Tt.
  • the transition period Tt adjusted by the current fluctuation width It is 15 msec or more and 35 msec or less, more preferably 15 msec or more and 20 msec or less.
  • FIG. 3 shows the relationship between the current fluctuation width It and the transition period Tt.
  • the arc during welding is stabilized by adjusting the current fluctuation width It and the transition period Tt within the arc stable region As, which is the above range of the current fluctuation width It and the transition period Tt shown in FIG.
  • the inductance value is, for example, an added value of the reactor 6 as a fixed value and a variable electronic reactor value by electronic reactor control.
  • the inductance value of reactor 6 is a fixed value, but may be variable.
  • the electronic reactor value is increased, the inductance value is decreased, and the followability of the voltage control is improved. It is adjusted so that It is within the arc stable region As.
  • the melting time of the welding wire 19 changes.
  • the transition period Tt for releasing the droplet 23 can be set to 15 msec or more and 35 msec or less in the arc stable region As, and a stable arc 17 can be obtained.
  • the current fluctuation range It is adjusted by changing a set voltage for setting an average value that is a moving average of the welding voltage V over a predetermined period.
  • the welding current I waveform is centered on the set current so that the current fluctuation range It is within the stable arc stable region As of the arc 17 as shown in FIG.
  • the current fluctuation width It is adjusted so as to fall within the predetermined range.
  • the current fluctuation range It is controlled by changing the inductance value related to the welding output.
  • the inductance value is an addition value of the reactor 6 and the electronic reactor value of the electronic reactor control stored in the storage unit 13, and outputs an output control signal corresponding to the inductance value to the driving unit 7.
  • the inductance value can be finely adjusted, and the current fluctuation width It can be adjusted so that the current fluctuation width It is within the arc stable region As.
  • the arc welding control method by adjusting the set voltage and the inductance value in the constant voltage control to optimize the current fluctuation range It, in other words, the fluctuation width of the growth of the droplet 23 is reduced.
  • the transition period Tt By optimizing and stabilizing the transition period Tt so that the current fluctuation width It is within the arc stable region As, it is possible to suppress the occurrence of spatter and achieve more stable arc welding.
  • the tip portion 519P of the welding wire 519 and the base material 518 are not short-circuited, so that spatter can be reduced. Is possible.
  • the distance between the tip 519P of the welding wire 519 and the base material 518 due to a disturbance such as a variation in the protruding length, which is the length that the welding wire 519 protrudes from the tip, or a displacement of the base material 518, etc. May become shorter.
  • the current fluctuation range It is controlled using the constant voltage control as described above, so that the fluctuation of the arc length L17 is suppressed.
  • the transition period Tt is stabilized, and the arc Is stable. Therefore, a minute short circuit between the welding wire 19 and the base material 18 is suppressed, spatter is reduced, and a bead having a uniform width is obtained.
  • the arc welding control method of constant voltage control in the spray transfer state in the first embodiment uses an arc welding apparatus that outputs the welding current I to the welding wire 19.
  • the welding current I is accelerated by starting the melting of the welding wire 19 and the peak current Ip when the droplet 23 formed by melting the welding wire 19 is detached from the welding wire 19.
  • the arc welding apparatus 101 is controlled so as to repeat the melting current Ig which is curved and continuously changed so as to have a minimum value IL in a concave shape.
  • the peak current Ip is larger than the average value of the welding current I by 25% or more and 45% or less of the average value of the welding current I
  • the minimum value IL of the melting current Ig is 25% of the average value of the welding current I.
  • the arc welding apparatus 101 is controlled so as to be smaller than the average value of the welding current I by 45% or less.
  • the arc welding apparatus 101 may be controlled so that the welding current I repeats the peak current Ip and the melting current Ig based on the set voltage Vs that sets the output of the welding voltage V.
  • the arc welding control method of constant voltage control in the spray transfer state uses an arc welding apparatus 101 that outputs a welding current I to the welding wire 19.
  • the difference between the peak current Ip and the minimum value IL is such that the transition period Tt from the start of melting of the welding wire 19 until the droplet 23 is detached from the welding wire 19 is 15 msec or more and 35 msec or less.
  • the current fluctuation width It may be controlled.
  • FIG. 4 is a schematic configuration diagram of the arc welding apparatus 101a according to the second embodiment.
  • the same reference numerals are given to the same portions as those of the arc welding apparatus 101 in the first embodiment shown in FIG.
  • the arc welding apparatus 101a in the second embodiment further includes a time measuring unit 11 connected to the droplet separation detecting unit 10 of the arc welding apparatus 101 in the first embodiment.
  • Time measuring unit 11 detects the transition period Tt by the following method. Since the arc length L17 suddenly increases at the droplet separation point t3 at which the droplet 23 has separated from the tip 19P of the welding wire 19, the welding voltage V detected at the droplet separation point t3 increases sharply. When the welding voltage A exceeds a predetermined voltage threshold or when the amount of change (dV / dt) per unit time of the welding voltage V exceeds a predetermined value, the droplet detachment detection unit 10 It is determined that the droplet 23 has detached, and the separation of the droplet 23 from the welding wire 19 is detected.
  • the timer 11 detects the time from when the droplet detachment detecting unit 10 detects the detachment of the droplet until the detachment of the droplet 23 is detected again as the transition period Tt.
  • the storage unit 13 stores the value of the transition period Tt within the arc stable region As (see FIG. 3) obtained in advance by experiments or the like.
  • the current fluctuation width It is adjusted so that the detected transition period Tt becomes the value of the transition period Tt in the arc stable region As stored in the storage unit 13.
  • the transition period Tt is detected using a predetermined voltage threshold value of the welding voltage V or a change amount (dV / dt) of the welding voltage V per unit time, and the transition is performed.
  • the current fluctuation width It so that the period Tt becomes a predetermined value within the arc stable region
  • the arc 17 can be stably arc-welded. Further, since the arc 17 is stabilized in this way, the bead width can be made uniform, and a minute short circuit is suppressed, so that sputtering is also reduced.
  • FIG. 5A shows external characteristics showing the relationship between welding current I and welding voltage V in the arc welding control method according to the third embodiment.
  • the vertical axis represents the average value of the welding voltage V
  • the horizontal axis represents the average value of the welding current I.
  • FIG. 5B shows the welding voltage V and the welding current I. The transition period Tt from the start of melting of the welding wire 19 to the separation of the droplet 23 is repeated after the droplet 23 is detached from the welding wire 19.
  • the current fluctuation width It of the transition period Tt2 next to the transition period Tt1 is obtained in advance by experiments or the like according to the arc length L17 in the transition period Tt1.
  • the current fluctuation width It is controlled based on the external characteristic curve shown in FIG. 5A so as to fall within the arc stable region As.
  • the current fluctuation width It may be controlled based on a data table showing the relationship of the external characteristics instead of the curve of the external characteristics shown in FIG. 5A.
  • the adjustment of the current fluctuation range It uses at least one welding control parameter among the peak current Ip, the melting current Ig, the transition period Tt, and the set voltage. Then, the current fluctuation width It is adjusted so as to satisfy the current fluctuation width It and the transition period Tt in the arc stable region As shown in FIG.
  • the welding voltage detection unit 9 shown in FIG. 1 detects the arc length L17 using the welding voltage V detected during a predetermined part of the immediately preceding transition period Tt1 or the current transition period Tt2. 5A and 5B, the set current Is and the set voltage Vs are set. Arc welding is performed using welding control parameters corresponding to the set current Is and set voltage Vs. In this arc welding, the average value of the welding voltage V within the transition period Tt1 from the start of melting of the welding wire 19 to the separation of the droplet 23 from the welding wire 19 after the droplet 23 is detached from the welding wire 19 The arc length L17 as an average value in the transition period Tt1 is detected.
  • the average value of the welding voltage V (output of the set voltage Vs) is detected as the average value of the arc length L17 in the transition period Tt1 immediately before the transition period Tt2.
  • the average value of the welding voltage V (the output of the set voltage Vs) is the value V1
  • the average value of the welding current I (the output of the set current Is) corresponding to the value V1 of the welding voltage V from the external characteristics shown in FIG. 5A. Is the value I1. Therefore, the welding control parameter of the setting voltage Vs of the welding voltage V value V1 and the setting current Is of the welding current I value I1 is used as the welding control parameter of the transition period Tt2.
  • the average value of the welding voltage V (the output value of the voltage with respect to the set voltage Vs) in the transition period Tt1 is detected as the average value of the arc length L17, and the welding current is detected in the next transition period Tt2 in accordance with the external characteristics shown in FIG. 5A.
  • the current fluctuation range It is controlled using the welding current control parameter of the peak current Ip and / or the melting current Ig so that the average value of I becomes a value corresponding to the average value of the welding voltage V detected in the transition period Tt1.
  • the generation of spatter can be suppressed and the bead width can be made uniform.
  • the average value of the arc length is detected from the average value of the welding voltage V in the transition period Tt1.
  • the average value of the welding current I (output of the set current Is) determined by the external characteristics shown in FIG. 5A corresponding to the average value of the welding voltage V detected in the transition period Tt1.
  • the current fluctuation width It in the next transition period Tt2 may be controlled using the peak current Ip (Ip2) and / or the melting current Ig (Ig2). Thereby, fine adjustment of the current fluctuation width It becomes possible.
  • the average value of the arc length is detected from the average value of the welding voltage V in the transition period Tt2.
  • the average value of the welding current I (output of the set current Is) determined by the external characteristics shown in FIG. 5A corresponding to the average value of the welding voltage V detected in the transition period Tt2.
  • the current fluctuation width It in the next transition period Tt3 may be controlled using the peak current Ip (Ip3) and / or the melting current Ig (Ig3). Thereby, fine adjustment of the current fluctuation width It becomes possible.
  • the arc length L17 is increased, and when the average value of the welding voltage V for each transition period Ttd is relatively high, the amount of heat input to the base material 18 is increased and the base material 18 is increased. May burn out. In this case, the slope of the external characteristic curve of the welding current I and the welding voltage V is relaxed, and a welding control parameter (welding current) with respect to fluctuations in the arc length L17 (the average value of the welding voltage V in each transition period Tt). By improving the followability of (average value of I), the amount of heat input to the base material 18 can be reduced.
  • the arc length L17 (average value of the welding voltage V) in the immediately preceding transition period Tt (Tt1) is detected during welding, and the arc is detected in the next transition period Tt (Tt2). Since the optimum current fluctuation width It is adjusted with respect to the length L17 (average value of the welding voltage V), the arc 17 is stabilized regardless of the protruding length L19 and the positions of the welding wire 19 and the base material 18.
  • the current fluctuation width It is adjusted to the next transition period Tt2 based on the arc length L17 in the transition period Tt1, but if the stability of the arc 17 is not adversely affected, for example, the following period after the transition period Tt2
  • the current fluctuation width It may be adjusted in the transition period Tt3 based on the arc length L17 in the transition period Tt1.
  • the arc 17 is stabilized because the arc length L17 is controlled to be constant. Thereby, a minute short-circuit between the welding wire 19 and the base material 18 is suppressed, it is possible to reduce spatter and make the bead width uniform, and it is also possible to suppress the welding wire 19 from being burned out.
  • the output of the welding voltage V is obtained in arc welding for constant voltage control in the spray transition state.
  • the welding output (welding voltage V, welding current I) is controlled.
  • the welding current repeats a peak current Ip having a protrusion from which the droplet 23 is detached and a melting current Ig having a curved waveform continuously changing in a concave shape that starts and accelerates the melting of the welding wire 19.
  • the set voltage Vs, the set current Is, the inductance value related to the welding output, and the welding so that the current fluctuation width It, which is the difference between the current Ip and the minimum value IL of the melting current Ig, becomes a predetermined value.
  • the welding current I is controlled using at least one of the external characteristics indicating the relationship between the current I and the welding voltage V. As a result, the welding current I is adjusted by the current fluctuation width It of the welding current I, so that the followability is high with respect to the fluctuation of the arc length L17, and the shield gas is used as in the conventional pulse arc welding method as constant current pulse control.
  • the concentration of carbon dioxide gas exceeds 30%, or carbonic acid is not limited.
  • the arc 17 is stabilized even when a shielding gas containing gas as a main component is used. Therefore, a minute short circuit between the welding wire 19 and the base material 18 is suppressed, spatter is reduced, and the bead width is made uniform.
  • the arc welding control method of constant voltage control in the spray transfer state generates arc 17 from the welding wire 19 by outputting the welding output including the welding current I and the welding voltage V to the welding wire 19.
  • the apparatus 101 is used.
  • the inductance value related to the welding output, the welding current I, and the welding voltage V are set such that the current fluctuation width It which is the difference between the peak current Ip and the minimum value IL becomes a predetermined value.
  • the arc welding apparatus is controlled using at least one of the external characteristics indicating the relationship.
  • the current fluctuation width It may be adjusted so that the transition period Tt from when the welding wire 19 starts to melt until the droplet 23 separates from the welding wire 19 falls within a predetermined range.
  • the transition period Tt may be 15 msec or more and 35 msec or less.
  • the droplet 23 is removed from the welding wire 19 after the welding wire 19 starts to melt.
  • the transition period Tt until the separation is detected.
  • the current fluctuation width It is adjusted so that the detected transition period Tt becomes a predetermined value within the arc stable region As determined in advance.
  • the peak current Ip is 25% or more of the average value of the welding current I and larger than the average value of the welding current by a value of 45% or less, and the minimum value IL of the melting current Ig is 45% or more of 25% or more of the average value of the welding current I.
  • the following value may be smaller than the average value of the welding current I.
  • the peak current Ip is larger than the average value of the welding current I by a value of 30% or less of the average value of the welding current I
  • the minimum value IL of the melting current Ig is the value of the welding current I by a value of 30% or less of the average value of the welding current. It may be smaller than the average value.
  • the arc welding apparatus may include a reactor and perform electronic reactor control.
  • the inductance value is an addition value of the reactor and the electronic reactor value by the electronic reactor control.
  • the arc welding apparatus 101 repeats the transition period Tt from when the welding wire 19 starts to melt until the droplet 23 separates from the welding wire 19. According to the arc length L17 of the arc 17 in a certain transition period Tt1 among the repeated transition periods Tt, the average of the welding current I in the transition period Tt2 next to the certain transition period Tt1 in the repeated transition periods Tt.
  • the current fluctuation width It is adjusted using external characteristics so that the value corresponds to the average value of the welding voltage V.
  • the current fluctuation width It may be controlled by at least one of the peak current Ip and the melting current Ig.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
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  • Arc Welding In General (AREA)
PCT/JP2016/001425 2015-04-07 2016-03-14 アーク溶接制御方法 WO2016163073A1 (ja)

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JP2017511456A JP6596675B2 (ja) 2015-04-07 2016-03-14 アーク溶接制御方法
CN201680008189.6A CN107206528B (zh) 2015-04-07 2016-03-14 电弧焊接控制方法

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2017029783A1 (ja) * 2015-08-17 2017-02-23 パナソニックＩｐマネジメント株式会社 アーク溶接制御方法
US20210107081A1 (en) * 2018-03-28 2021-04-15 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Gas shielded arc welding control method and control device

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