US 7,145,101 B2 · Pulse arc welding output control method and arc length variation pulse arc welding output control method

Abstract

An output control method is provided for a pulse arc welding in which a welding current flows for one pulse period consisting of a peak period with a flow of a peak current and a base period with a flow of a base current. External characteristics of a welding power source are preliminarily set by a slope Ks, a welding current reference value Is and a welding voltage reference value Vs. The absolute value va of the welding voltage and the absolute value ia of the welding current during welding are detected. The integration Svb=∫(Ks×ia−Ks×Is+Vs−va) dt is calculated from a starting point of an n-th pulse period. The n-th pulse period is ended when the integration Svb becomes no smaller than zero during the base period. Then, the (n+1)-th pulse period is started.

Claims12

Dependent claims

An output control method for a pulse arc welding in which welding is performed by causing a welding current to flow for one pulse period including a peak period with a flow of a peak current and a base period with a flow of a base current, and by applying a welding voltage between a welding wire and a matrix material, the method comprising the steps of:

preliminarily setting external characteristics of a welding power source by a slope Ks, a welding current reference value Is and a welding voltage reference value Vs;
detecting an absolute value va of the welding voltage and an absolute value ia of the welding current during welding;
calculating integration Svb=∫(Ks×ia−Ks×Is+Vs−va)dt from a starting point of an n-th pulse period;
ending the n-th pulse period when the integration Svb becomes no smaller than zero during a base period following a predetermined peak period;
and
starting a (n+1)-th pulse period subsequent to the n-th pulse period.

3 more elements

An output control method for a pulse arc welding in which welding is performed by causing a welding current to flow for one pulse period including a base period with a flow of a base current and a peak period with a flow of a peak current, and by applying a welding voltage between a welding wire and a matrix material, the method comprising the steps of:

preliminarily setting external characteristics of a welding power source by a slope Ks, a welding current reference value Is and a welding voltage reference value Vs;
detecting an absolute value va of the welding voltage and an absolute value ia of the welding current during welding;
calculating integration Svb=∫(Ks×ia−Ks×Is+Vs−va)dt from a starting point of an n-th pulse period;
ending the n-th pulse period when the integration Svb becomes no greater than zero during a peak period following a predetermined base period;
and
starting a (n+1)-th pulse period subsequent to the n-th pulse period.

3 more elements

An output control method for a pulse arc welding in which welding is performed by causing a welding current to flow for one pulse period including a minus electrode period with a flow of a minus electrode current, a plus electrode peak period with a flow of a peak current and a base period with a flow of a base current, and by applying a welding voltage between a welding wire and a matrix material, the method comprising the steps of:

preliminarily setting external characteristics of a welding power source by a slope Ks, a welding current reference value Is and a welding voltage reference value Vs;
detecting an absolute value va of the welding voltage and an absolute value ia of the welding current during welding;
calculating integration Svb=∫(Ks×ia−Ks×Is+Vs−va)dt from a starting point of an n-th pulse period;
ending the n-th pulse period when the integration Svb becomes no smaller than zero during a base period following a predetermined minus electrode period and a predetermined peak period;
and
starting a (n+1)-th pulse period subsequent to the n-th pulse period.

3 more elements

Dependencies are inferred from the claim text.

Pulse arc welding output control method and arc length variation pulse arc welding output control method

Life of this patent

Pulse arc welding output control method and arc length variation pulse arc welding output control method

Life of this patent

Abstract

Claims12