MONITORING METHOD FOR PLASMA ARC WELDING AND PLASMA ARC WELDING DEVICE

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20140312011A1
SERIAL NO

14358633

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The method of monitoring keyhole welding with a plasma arc includes the step of measuring output voltages when welding is performed with a constant current, and the step of finding peak frequencies and distributions of welding voltages by analyzing frequencies of the welding voltages which correlate to a molten weld pool (P) vibration among the output voltages measured. The method also includes the step of identifying the peak frequencies that correlate to the molten weld pool (P) vibration, and the step of comparing the identified peak frequencies with a frequency range and determining whether the welding is good or bad. Thus, whether or not good keyhole welding is carried out can be determined with excellent precision by simply comparing the peak frequency that correlates to the molten weld pool (P) vibration with the frequency range.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
HITACHI CONSTRUCTION MACHINERY CO LTDTOKYO 110-0015

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hosoya, Kazumichi Tsuchiura-shi, JP 2 2
Kanemaru, Shuhei Tokyo, JP 5 6
Nakajima, Toru Tsuchiura-shi, JP 19 69
Sato, Toyoyuki Tokyo, JP 13 34
Wada, Katsunori Tokyo, JP 19 37
Yamamoto, Hikaru Tsuchiura-shi, JP 16 75

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation