Arc welding method and arc welding device
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsNORIYUKI MATSUOKA, SHUN SATOU, MASARU KOWA, AKIRA NAKAGAWA, JUNJI FUJIWARA
Life of this patent
Estimating the term…
Abstract
In arc welding in which a welding wire serving as a consumable electrode is fed toward a base material and a welding current is caused to flow through the welding wire and the base material to alternately repeat a reverse polarity period and a positive polarity period, after a short circuit between the welding wire and the base material is detected, a feeding speed of the welding wire is changed from a first feeding speed to a second feeding speed on a negative side of the first feeding speed when a speed in a direction toward the base material is defined as positive.
Claims14
An arc welding method in which a welding wire serving as a consumable electrode is fed toward a base material, and a welding current is caused to flow through the welding wire and the base material to alternately repeat a reverse polarity period in which the welding wire serves as a positive electrode and the base material serves as a negative electrode, and a positive polarity period in which the welding wire serves as the negative electrode and the base material serves as the positive electrode, and thus generating an arc between the welding wire and the base material to weld the base material, the arc welding method comprising the steps of:
- a) detecting a short-circuit between the welding wire and the base material;
- and
- b) changing a feeding speed of the welding wire from a first feeding speed to a second feeding speed on a negative side of the first feeding speed when a speed in a direction in which the welding wire is fed toward the base material is defined as positive after the short-circuit between the welding wire and the base material is detected in the step a).
An arc welding device in which a welding wire serving as a consumable electrode is fed toward a base material by a wire feeder, and a welding current is caused to flow through the welding wire and the base material to alternately repeat a reverse polarity period in which the welding wire serves as a positive electrode and the base material serves as a negative electrode, and a positive polarity period in which the welding wire serves as the negative electrode and the base material serves as the positive electrode, and thus generating an arc between the welding wire and the base material to weld the base material, the arc welding device comprising:
- a power converter that causes the welding current to flow through the welding wire and the base material;
- and
- a controller that controls the wire feeder to change a feeding speed of the welding wire from a first feeding speed to a second feeding speed on a negative side of the first feeding speed when a speed in a direction in which the welding wire is fed toward the base material is defined as positive after detecting a short-circuit between the welding wire and the base material.
Dependencies are inferred from the claim text.