Method of detecting amount of discrepancy in arc tracking welding
AssigneeKobe Steel, Ltd.
InventorsTsutomu One, Yoshiharu Nishida, Atsushi Fukunaga
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Abstract
In a method for detecting a deviation in arc-tracking welding, a deviation between a welding line and an actual welding position is detected in arc-tracking welding for performing welding tracking the welding line while performing a weaving operation of swinging a welding torch with respect to a welding direction. The method includes fitting a waveform expressed by a function repeated periodically in a period equal to a weaving period to a waveform of a welding current or a welding voltage and detecting a deviation in arc-tracking welding based on a fitted waveform.
Claims6
A method for detecting a deviation in arc-tracking welding, in which a deviation between a welding line and an actual welding position is detected in arc-tracking welding for performing welding tracking the welding line while performing a weaving operation of swinging a welding torch with respect to a welding direction,
- the method comprising fitting a waveform expressed by a function repeated periodically in a period equal to a weaving period to a waveform of a welding current or a welding voltage and detecting a deviation in arc-tracking welding based on a fitted waveform, wherein in fitting the waveform expressed by the function is fitted to the waveform of the welding current or the welding voltage, sequential fitting is performed using, of acquired pieces of data of the welding current or the welding voltage, each piece corresponding to one past weaving period whenever the pieces of data are acquired;
- and
- calculating an average of results of the sequential fitting every predetermined period of time while the sequential fitting is performed.
Dependencies are inferred from the claim text.