Welding target position measurement device

摘要

According to an embodiment, a welding target position measuring device comprises: a groove wall welding part detection means for detecting a groove wall welding part based on a result of the calculation performed by a groove shape change amount calculation means; a weld bead end detection means for detecting a weld bead end based on a result of the calculation performed by a groove shape difference amount calculation means; and a welding target position selection means for obtaining a welding pass number of a subsequent pass in a welding information stored in a welding information recording means and selecting a welding target position of the subsequent pass which differs depending on welding positions based on results of the detection of the groove wall welding part and the weld bead end.

主权项

1. A welding target position measurement device comprising:
a groove shape detector configured to detect a groove shape as shape data; a groove shape recording unit configured to record the shape data detected by the groove shape detector; a welding information recording unit configured to record welding information including at least a welding position and a welding pass number; a groove shape position adjustment processor configured to adjust a position of current shape data to a position of past shape data; a groove shape change amount calculator configured to calculate a shape change amount based on the current shape data; a groove shape difference calculator configured to calculate a difference between the current and the past shape data; a groove wall welding part detector configured to detect ends of a groove wall welding part as measurement points based on the shape change amount calculated by the groove shape change amount calculator; a weld bead end detector configured to detect weld bead ends as measurement points based on the difference calculated by the groove shape difference calculator; and a welding target position selector configured to obtain the welding pass number of a subsequent pass in the welding information stored in the welding information recording unit, the welding target position selector configured to select the welding target position of the subsequent pass which differs depending on welding positions based on results of the detection of the groove wall welding part and the weld bead end, wherein the shape change amount calculated by the shape change amount calculator comprises an angle formed between two lines of the current shape data, each of the two lines extends from each of the measurement points to each of closest adjacent measurement points thereof, respectively, wherein the groove wall welding part detector is configured to detect a boundary point between a welding base material and a weld bead at one of the measurement points at which the angle between the two lines at the one of the measurement points is equal to or larger than a threshold based on the shape change amount calculated by the groove shape change amount calculator.