| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrode position control method for tandem arc welding, a robot controller for a tandem arc welding system, and a tandem arc welding system, by which, even if a weld line at the starting time of welding is shifted from that at the time of teaching, the positions of a leading electrode and a trailing electrode are appropriately corrected in accordance with the position of the weld line so that weld defects are prevented. <P>SOLUTION: The electrode position control method includes a voltage detecting step of detecting the voltages of a leading electrode (2a) and a trailing electrode (2b) that are brought into contact with a welding workpiece W by means of electric current and voltage detecting means 6, 7, a sensing step of detecting the positional information of the welding workpiece W from the electrical changes by means of a sensing and processing means 12, a correction amount calculating step of calculating a correction amount for correcting the positional displacement of the leading electrode 2a and the trailing electrode 2b with respect to the weld line from the positional information by means of a correction amount calculating and processing means 16, and a position correcting step of correcting each of positions of the electrodes by adding or subtracting the correction amount by means of a robot track planning and processing means 17. <P>COPYRIGHT: (C)2012,JPO&INPIT |
