Welding state determination system and welding state determination method
AssigneeKobe Steel, Ltd.
InventorsTatsuya Fujii, Tsutomu One, Atsushi Fukunaga
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Abstract
This welding state determination system acquires, for each weaving cycle, a characteristic amount that pertains to a physical quantity that changes according to the cycle of a weaving operation. A degree of abnormality is calculated based on an observation value that is the characteristic amount acquired in one cycle, and the average and standard deviation of a plurality of past values that are the characteristic amounts acquired prior to the one cycle. A welding state is determined based on the calculated degree of abnormality.
Claims15
A welding state determination system that determines a welding state in arc welding by a weaving operation in which a welding torch is oscillated in cycles, the welding state determination system comprising:
- a processor configured to:
- acquire, for each cycle, a characteristic amount that pertains to a physical quantity that changes according to the cycle of the weaving operation;
- calculate a degree of abnormality based on an observation value that is the characteristic amount acquired in one cycle by the processor and an average and standard deviation of a plurality of past values that are the characteristic amounts acquired prior to the one cycle by the processor;
- and
- determine the welding state based on the degree of abnormality calculated by the processor,
- wherein the processor is configured to:
- approximate temporal change of the characteristic amount;
- and
- calculate the degree of abnormality based on a difference between the observation value and approximation value of the observation value obtained by the processor, and the average and the standard deviation of the differences between the past values and the approximation values of the past values obtained by the processor.
Dependencies are inferred from the claim text.