Abstract: An arc welding control method for controlling welding in which a material of a welding wire is aluminum or an aluminum alloy, and a feed speed Fw of the welding wire is alternately switched between a forward feed period and a reverse feed period to repeat a short circuit period and an arc period, a welding current Iw is controlled so that an average value of maximum values of the welding current Iw during the short circuit period is 150 A or less. A reverse feed peak value Wrp during the reverse feed period is set so that an average value of time lengths of the short circuit period is 7 ms or less. Accordingly, the current value can be reduced when the short circuit is released and the lengthening in the short circuit period can be prevented, so that the spatter generation amount can be reduced.

Abstract: An arc welding method is described where pulse arc welding is performed with a welding wire being fed in a forward direction during a first period and short-circuit transfer arc welding is performed with the welding wire being fed in the forward direction and a reverse direction during a second period. The arc welding method alternately switches between the first period and the second period, where the switching of the first period to the second period is performed during a peak period of the pulse arc welding.

Abstract: An arc welding method includes the following steps. Pulse arc welding is performed with the welding wire being fed in a forward direction during a first period. Short-circuit transfer arc welding is performed with the welding wire being fed in the forward direction and the reverse direction during a second period. The first period and the second period are alternately switched. The switching of the first period to the second period is performed in a manner such that no transfer of a molten droplet of the welding wire occurs during the final pulse cycle of the first period.

Abstract: The purpose of the present invention is to reduce the amount of sputtering in a welding method wherein a welding wire feed rate is alternately switched between a forward feed period and a reverse feed period. Provided is an arc welding control method that switches a feed rate Fw for welding wire alternately between a forward feed period and a reverse feed period, repeats a short period and an arc period, and electrifies with a welding current Iw switched to a small current value in the latter half of the arc period, wherein a basic voltage setting value is set according to an average feed rate setting value, the error amplitude value for a voltage setting value and the basic voltage setting value is calculated, and the timing (current reduction time Td) for switching the welding current Iw to the small current value is varied on the basis of the average feed rate setting value and the error amplitude value.

Abstract: In an arc start control method for forward and reverse feed arc welding in which forward and reverse feed control of alternately switching a feed speed Fw of a welding wire between a forward feed period and a reverse feed period is performed to generate a short circuit period and an arc period to perform welding, at arc start, a pulse period Tp during which a pulse current is energized for a plurality of number of times is provided, and thereafter forward and reverse feed control is started from forward feed period of the welding wire. During the pulse period Tp, a forward feed speed Fp of the welding wire is set so that the arc period is continuous. In addition, the forward feed speed Fp is changed based on a time length of pulse period Tp and/or a value of a welding voltage Vw during pulse period Tp.

Abstract: In an arc welding control method for controlling welding in which a material of a base material is a galvanized steel sheet, a feed speed of a welding wire is alternately switched between a forward feed period and a reverse feed period, and a short circuit period and an arc period are repeated, during the arc period, a first arc period Ta1 during which a first arc current Ia1 is applied, a second arc period Ta2 during which a second arc current Ia2 is applied, and a third arc period Ta3 during which a third arc current Ia3 is applied are switched over time, and it is controlled so as to be Ia1>Ia2>Ia3. Constant voltage control is performed during the second arc period Ta2, and constant current control is performed during the first arc period Ta1.

Abstract: A method is provided for controlling arc welding including forward and reverse feeding periods alternately switched. By the method, a set of a short circuit period and an arc period is repeated, and the arc welding is controlled such that the reverse feeding period shifts to the forward feeding period when an arc occurs during the reverse feeding period, and that the forward feeding period shifts to the reverse feeding period when a short circuit occurs between the welding wire and the object during the forward feeding period. The reverse feeding period includes a reverse feeding deceleration period having a time length that is adjusted in accordance with the time length of the short circuit period.

Abstract: An arc welding method includes the following steps. Pulse arc welding is performed with the welding wire being fed in a forward direction during a first period. Short-circuit transfer arc welding is performed with the welding wire being fed in the forward direction and the reverse direction during a second period. The first period and the second period are alternately switched. The switching of the first period to the second period is performed in a manner such that no transfer of a molten droplet of the welding wire occurs during the final pulse cycle of the first period.

Abstract: An arc welding method includes: performing pulse arc welding with a welding wire being fed in a forward direction during a first period; performing short-circuit transfer arc welding with the welding wire being fed in the forward direction and a reverse direction during a second period; and alternately switching between the first period and the second period. The switching of the first period to the second period is performed during a peak period of the pulse arc welding.

Abstract: In an arc welding control method for controlling welding in which a material of a base material is a galvanized steel sheet, a feed speed of a welding wire is alternately switched between a forward feed period and a reverse feed period, and a short circuit period and an arc period are repeated, during the arc period, a first arc period Ta1 during which a first arc current Ia1 is applied, a second arc period Ta2 during which a second arc current Ia2 is applied, and a third arc period Ta3 during which a third arc current Ia3 is applied are switched over time, and it is controlled so as to be Ia1>Ia2>Ia3. Constant voltage control is performed during the second arc period Ta2, and constant current control is performed during the first arc period Ta1.

Abstract: The purpose of the present invention is to reduce the amount of sputtering in a welding method wherein a welding wire feed rate is alternately switched between a forward feed period and a reverse feed period. Provided is an arc welding control method that switches a feed rate Fw for welding wire alternately between a forward feed period and a reverse feed period, repeats a short period and an arc period, and electrifies with a welding current Iw switched to a small current value in the latter half of the arc period, wherein a basic voltage setting value is set according to an average feed rate setting value, the error amplitude value for a voltage setting value and the basic voltage setting value is calculated, and the timing (current reduction time Td) for switching the welding current Iw to the small current value is varied on the basis of the average feed rate setting value and the error amplitude value.

Abstract: In an arc start control method for forward and reverse feed arc welding in which forward and reverse feed control of alternately switching a feed speed Fw of a welding wire between a forward feed period and a reverse feed period is performed to generate a short circuit period and an arc period to perform welding, at arc start, a pulse period Tp during which a pulse current is energized for a plurality of number of times is provided, and thereafter forward and reverse feed control is started from forward feed period of the welding wire. During the pulse period Tp, a forward feed speed Fp of the welding wire is set so that the arc period is continuous. In addition, the forward feed speed Fp is changed based on a time length of pulse period Tp and/or a value of a welding voltage Vw during pulse period Tp.

Abstract: An arc welding control method for controlling welding in which a material of a welding wire is aluminum or an aluminum alloy, and a feed speed Fw of the welding wire is alternately switched between a forward feed period and a reverse feed period to repeat a short circuit period and an arc period, a welding current Iw is controlled so that an average value of maximum values of the welding current Iw during the short circuit period is 150 A or less. A reverse feed peak value Wrp during the reverse feed period is set so that an average value of time lengths of the short circuit period is 7 ms or less. Accordingly, the current value can be reduced when the short circuit is released and the lengthening in the short circuit period can be prevented, so that the spatter generation amount can be reduced.

Abstract: There is provided an arc welding control method for performing a forward/reverse feeding control of alternating a feeding rate of a welding wire between a forward feeding period and a reverse feeding period, and generating short-circuiting periods and arc periods to perform welding. The welding wire is fed forwardly upon starting the welding. The forward feeding is continued during a transient welding period from a time point at which the welding wire comes in contact with a base material and conduction of welding current is started to a time point at which convergence on a steady welding period is performed. The transient welding period is terminated at the short-circuiting period. The forward/reverse feeding control is started from the reverse feeding period after the termination of the transient welding period.

Abstract: There is provided an arc welding control method. As to a feeding rate of a welding wire, a forward feeding period and a reverse feeding period are alternated cyclically to generate short-circuiting periods and arc periods. When a constriction of a droplet formed at the welding wire is detected during the short-circuiting period, a welding current is reduced to shift to the arc period. Sensitivity of the detection of constriction is changed according to a waveform parameter of the feeding rate.

Abstract: An arc welding power supply supplies power to a welding wire functioning as a discharge electrode to generate an arc from an electrode distal end of the welding wire and perform arc welding on a welded article. The arc welding power supply includes an output control unit that adjusts the power supplied to the welding wire to a power value suitable for arc welding. A feed control unit cyclically changes a feeding speed of the welding wire. The feeding speed includes a forward feeding speed and a rearward feeding speed. An amplitude control unit cyclically changes an amplitude of the feeding speed of the welding wire to cyclically vary an average arc length.

Abstract: A method is provided for controlling arc welding including forward and reverse feeding periods alternately switched. By the method, a set of a short circuit period and an arc period is repeated, and the arc welding is controlled such that the reverse feeding period shifts to the forward feeding period when an arc occurs during the reverse feeding period, and that the forward feeding period shifts to the reverse feeding period when a short circuit occurs between the welding wire and the object during the forward feeding period. The reverse feeding period includes a reverse feeding deceleration period having a time length that is adjusted in accordance with the time length of the short circuit period.

Abstract: There is provided an arc welding control method for performing a forward/reverse feeding control of alternating a feeding rate of a welding wire between a forward feeding period and a reverse feeding period, and generating short-circuiting periods and arc periods to perform welding. The welding wire is fed forwardly upon starting the welding. The forward feeding is continued during a transient welding period from a time point at which the welding wire comes in contact with a base material and conduction of welding current is started to a time point at which convergence on a steady welding period is performed. The transient welding period is terminated at the short-circuiting period. The forward/reverse feeding control is started from the reverse feeding period after the termination of the transient welding period.

Abstract: A consumable electrode arc welding method includes the detecting of a constriction formed in a molten droplet of the welding wire so as to reduce the welding current, the detecting of a smoothed value of the welding current, and the feedback controlling of the feed rate of the welding wire so as to make the smoothed value of the welding current correspond to a predetermined current setting value. The constriction detection is performed repetitively in a predetermined cycle. In each time of the repetition, the length of a constriction time, from the constriction detection till the arc generation, is measured. The number of constriction time lengths falling outside a predetermined range is counted. When the counted number is not less than a reference number, the transient response time of the feedback control is made longer.

Abstract: There is provided an arc welding control method. As to a feeding rate of a welding wire, a forward feeding period and a reverse feeding period are alternated cyclically to generate short-circuiting periods and arc periods. When a constriction of a droplet formed at the welding wire is detected during the short-circuiting period, a welding current is reduced to shift to the arc period. Sensitivity of the detection of constriction is changed according to a waveform parameter of the feeding rate.