Title:
AC PULSE ARC WELDING CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2018/079345
Kind Code:
A1
Abstract:
The present invention stabilizes the growth state of molten droplets during an electrode negative polarity peak period in consumable electrode AC pulse arc welding. This AC pulse arc welding control method includes feeding a welding wire, and carrying out welding by repeatedly applying welding currents, namely, applying an electrode negative polarity base current during an electrode negative polarity base period, applying an electrode negative polarity peak current during an electrode negative polarity peak period, and then applying an electrode positive polarity current during an electrode positive polarity period. The electrode negative polarity peak period comprises a rising period Tu, a peak period Ta, and a falling period Td. The temporal proportion of the peak period Ta with respect to the electrode negative polarity peak period is less than 20%, and the falling period Td is at least twice as long as the rising period Tu.
Inventors:
TAKADA KENTO (JP)
KONDO WAKANA (JP)
KONDO WAKANA (JP)
Application Number:
PCT/JP2017/037552
Publication Date:
May 03, 2018
Filing Date:
October 17, 2017
Export Citation:
Assignee:
DAIHEN CORP (JP)
International Classes:
B23K9/073; B23K9/09
Domestic Patent References:
| WO2011114679A1 | 2011-09-22 |
Foreign References:
| JP3200614U | 2015-10-29 | |||
| JP2013240811A | 2013-12-05 | |||
| JP2012096276A | 2012-05-24 | |||
| JP2011152575A | 2011-08-11 | |||
| JP2002096168A | 2002-04-02 | |||
| JP2014034049A | 2014-02-24 | |||
| JP2016207958A | 2016-12-08 | |||
| JP2016232014A | 2016-11-30 | |||
| JP2016254894A | 2016-12-28 |
Other References:
See also references of EP 3530395A4
Attorney, Agent or Firm:
KOH-EI PATENT FIRM, P.C. (JP)
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