Title:
PULSE ARC WELDING METHOD
Document Type and Number:
Japanese Patent JP2978598
Kind Code:
B2
Abstract:
PURPOSE: To maintain an arc length constant and to ensure transfer of one droplet per one pulse by varying an average value of a welding current based on the difference between a detected value and a set value of a pulse current.
CONSTITUTION: A current value detected by a current detector 10 of an output control circuit is inputted to a pulse current peak value detector 12. A voltage value detected by a voltage detector 11 is inputted to a pulse voltage detector 15. The pulse current peak value detector 12 obtains a peak value in a pulse period of time and outputs this to a pulse frequency control circuit 14. The pulse frequency control circuit 14 outputs a pulse frequency command value to a pulse waveform selecting circuit 20 based on the difference between this detected value and the set value. A pulse current control circuit 17 obtains a pulse current command value formed by amplifying a difference signal between a detected value and a set value of the pulse voltage and outputs this to the pulse waveform selecting circuit 20. This selecting circuit 20 selects the command value of the pulse current or a set value of a base current and outputs this to an inverter driving circuit 21 to drive and control an inverter 4 based on this.
Inventors:
MARUYAMA TOKUJI
OKADA MASASHI
PPONMA MASAHIRO
OKADA MASASHI
PPONMA MASAHIRO
Application Number:
JP20473591A
Publication Date:
November 15, 1999
Filing Date:
July 19, 1991
Export Citation:
Assignee:
KOBE SEIKOSHO KK
International Classes:
B23K9/09; H02M9/00; (IPC1-7): B23K9/09; H02M9/00
Domestic Patent References:
| JP57190776A | ||||
| JP6320172A | ||||
| JP58167077A | ||||
| JP4333368A | ||||
| JP6316868A | ||||
| JP62212069A |
Attorney, Agent or Firm:
Masanori Fujimaki