| 摘要 |
PROBLEM TO BE SOLVED: To enable stabilized and good joining by correction-controlling an irradiation position as taking a relative error quantity of detection positions of laser beam and joining line for a detection position deviation quantity at hot bar joining. SOLUTION: Among the data (h) detected by a laser irradiation position detector 23, an average value of bar advancing direction component detrimental to laser beam joining is hx. Samples 22, 24 for joining line simulation are arranged at equal interval to the irradiation position detector 23, the average value gx between an average value g1x of joining line detected value g1 at the sample 22 and an average value g2x of g2 at the sample 24 is turned to an joining line detection position at the position of irradiation position detector 23. Based on the above, a deviation quantity (s) between laser irradiation position and Joining line detection position is obtained as a difference between gx and hx. The deviation quantity (s) is recognized as the relative position deviation quantity between laser beam and a joining line detector 30, by correcting the laser irradiation position, the subsequent bar joining is executed well, correction at each time is desirable. |
