摘要:
A consumable electrode arc-welding machine comprising an arc resistance calculating part that calculates an arc resistance from a welding current and a welding voltage to develop an arc resistance signal, wherein the welding current and welding voltage are controlled by a short-circuit waveform control signal and an arc waveform control signal that vary in accordance with the arc resistance signal. In this way, the spatter control and the arc stability can be achieved. During an arc period, if the arc resistance signal exhibits a level greater than a predetermined level for a predetermined period, a constant current control signal is developed to perform a constant current control of the welding current by use of a predetermined current value that is higher than the current value developed during the development of the arc waveform control signal, thereby preventing the arc from going off.
摘要:
A consumable electrode arc-welding machine comprising an arc resistance calculating part that calculates an arc resistance from a welding current and a welding voltage to develop an arc resistance signal, wherein the welding current and welding voltage are controlled by a short-circuit waveform control signal and an arc waveform control signal that vary in accordance with the arc resistance signal. In this way, the spatter control and the arc stability can be achieved. During an arc period, if the arc resistance signal exhibits a level greater than a predetermined level for a predetermined period, a constant current control signal is developed to perform a constant current control of the welding current by use of a predetermined current value that is higher than the current value developed during the development of the arc waveform control signal, thereby preventing the arc from going off.
摘要:
A welder power supply and welding method are provided which utilizes a short arc welding method in which the waveforms have a positive polarity portion and negative portion to optimize heat input and provide heat and current control.
摘要:
Primärseitig eines Transformators (2) ist ein Hauptschaltaggregat (8) und in Reihe dazu ein Umschaltaggregat (9) vorgesehen, wobei das Hauptschaltaggregat (8) zwischen einem Einschaltzustand und einem Ausschaltzustand umsteuerbar ist, während mit dem Umschaltaggregat (9) zwischen unterschiedlichen Wicklungen bzw. Wicklungsanzapfungen der Primärseite des Transformators umgeschaltet werden kann, um die Strom-Spannungs-Charakteristik auf der Sekundärseite des Transformators, welche für eine Last mit hohem elektrischen Strombedarf ausgelegt ist, zu verändern. Erfindungsgemäß ist das Umschaltaggregat (9) im Einschaltzustand des Hauptschaltaggregates (8) gegen Umschaltung und/oder das Hauptschaltaggregat (8) beim Umschalten des Umschaltaggregates (9) gegen Einnahme seines Einschaltzustandes gesperrt.
摘要:
Eine oder mehrere abschmelzende Elektroden (15) werden jeweils aus einer Wechselstromquelle (14) mit fallender Kennlinie gespeist. Die Vorschubgeschwindigkeit der Elektrode (15) wird in Abhängigkeit von der Lichtbogenspannung auf eine konstante Lichtbogenlänge geregelt. Über einen weiteren Regler (37) wird die Abschmelzleistung dadurch geregelt, daß dem Regler (37) als Istwert die Vorschubgeschwindingkeit zugeführt wird und in Abhängigkeit davon die Schweißstromstärke verändert wird. Die Veränderung der Schweißstromstärke führt zu einer Vergrößerung oder Verkleinerung der Lichtbogenlänge, die ihrerseits über den ersten Regler durch Veränderung der Vorschubgeschwindigkeit ausgeregelt wird.
摘要:
A welding control method alternately repeats a short circuit period, during which a welding wire and an object to be welded short-circuit, and an arc period, during which an arc is generated and discharged, to weld the object to be welded. The method compares average output voltage, which is an average of welding voltage calculated during welding, to set voltage preliminarily set, and controls a welding output current produced when an arc is generated based on the comparison result therefrom, to regulate the meltage of the wire for adjusting the arc length, which brings the short circuit cycle closer to a constant one when a disturbance (e.g. extended or shortened arc length) occurs.
摘要:
In a consumable electrode type arc welding machine, an arc resistance calculator for calculating an arc resistance from the welding current and the welding voltage is provided. The welding current and the welding voltage are controlled by making use of a short-circuit waveform control signal and an arc waveform control signal which change in accordance with the arc resistance signal. This suppresses the sputtering phenomenon and ensures the stability of arc. Furthermore, if arc resistance signal goes higher than a certain specific level for a certain time in an arc period, a constant-current control signal is output so as to control the welding current to be a constant-current with a certain current value that is higher than that output at the moment when arc waveform control signal is output. This prevents the occurrence of an arc break.