Enhanced power factor correction for welding and cutting power supplies
US-9162310-B2 · Oct 20, 2015 · US
Arc welding method
US2016332247A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016332247-A1 |
| Application number | US-201515110855-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 9, 2015 |
| Priority date | Feb 24, 2014 |
| Publication date | Nov 17, 2016 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
There is provided an arc welding method. In the method, welding is performed in a spray transfer mode by feeding a welding wire. A first welding current Iw 1 is flown during a first period. A second welding current Iw 2 is flown during a second period. A third welding current Iw 3 is flown during a third period, where 0<Iw 2 <Iw 3 <Iw 1. The first to third periods are alternately repeated.
First claim
Opening claim text (preview).
1 . An arc welding method in which welding is performed in a spray transfer mode by feeding a welding wire, comprising: flowing a first welding current Iw 1 during a first period, flowing a second welding current Iw 2 during a second period and flowing a third welding current Iw 3 during a third period, where 0<Iw 2 <Iw 3 <Iw 1 , and alternately repeating the first to third periods. 2 . The arc welding method according to claim 1 , wherein the third period is longer than each of the first period and the second period. 3 . The arc welding method according to claim 1 , wherein an inclination of the welding current upon change from the third welding current Iw 3 to the first welding current Iw 1 is gentle as compared with an inclination of the welding current upon change from the second welding current Iw 2 to the third welding current Iw 3 . 4 . The arc welding method according to claim 1 , wherein an inclination of the welding current upon change from first welding current Iw 1 to the second welding current Iw 2 is gentle as compared with a predetermined reference inclination. 5 . The arc welding method according to claim 1 , wherein the third welding current Iw 3 is a current which reduces with a lapse of time stepwise. 6 . The arc welding method according to claim 1 , wherein in a case where short circuit occurs between the welding wire and base material, the third period starts from a time where an arc is regenerated after the short circuit is released. 7 . The arc welding method according to claim 1 , wherein the second period and/or the second welding current Iw 2 are changed according to a frequency of the short circuit occurred between the welding wire and the base material. 8 . The arc welding method according to claim 1 , wherein an average value of a welding voltage is changed according to a frequency of the short circuit occurred between the welding wire and the base material. 9 . The arc welding method according to claim 1 , wherein the second period and/or the second welding current Iw 2 are changed according to a time length of the short circuit occurred between the welding wire and the base material. 10 . The arc welding method according to claim 1 , wherein an average value of the welding voltage is changed according to a time length of the short-circuit occurred between the welding wire and the base material.
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Classifications
using sensing means, e.g. optical · CPC title
with computing means · CPC title
and of a consumable electrode · CPC title
- B23K9/092Primary
characterised by the shape of the pulses produced · CPC title
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Frequently asked questions
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- What does patent US2016332247A1 cover?
- There is provided an arc welding method. In the method, welding is performed in a spray transfer mode by feeding a welding wire. A first welding current Iw 1 is flown during a first period. A second welding current Iw 2 is flown during a second period. A third welding current Iw 3 is flown during a third period, where 0<Iw 2 <Iw 3 <Iw 1. The first to third periods are alternately repeated.
- Who is the assignee on this patent?
- Daihen Corp
- What technology area does this patent fall under?
- Primary CPC classification B23K9/092. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Nov 17 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).