Patent ID: 11931830
Assignee: KOBE STEEL, LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. The method of claim 5, wherein the forced separation control period includes a forced current decreasing section in which the welding current is decreased, a forced current maintaining section in which the welding current is maintained at a constant forced separation maintaining current Ih2 after the forced current decreasing section, and a forced current increasing section in which the welding current is increased after the forced current maintaining section,
wherein a slope of the welding current in the forced current decreasing section is in a range of from −100 A/ms or less,
wherein a forced separation maintaining time Th2 of the welding current in the forced current maintaining section is in a range of from 1 ms to 5 ms,
wherein a slope of the welding current in the forced current increasing section is in a range of from 10 A/ms to 300 A/ms, and
wherein the method further:
comprises providing a forced separation arc period in which the welding current after the forced separation control period is maintained under a condition of a forced arc maintaining current Ih3 being in a range of from 1.20 to 2.50 times the setting current Icc and a forced arc maintaining time Th3 in a range of from 3 ins to 10 ms.