| 摘要 |
Disclosed is a zero point setting-based workpiece welding control method that enables greater machining precision, that enables the control of machine tool wear, loosening and damage and so on, and that enables the efficient implementation of zero point setting. During a welding process which involves setting a plate-shaped workpiece (W) and a nut (N) on a positioning pin (8) projecting upward through a through-hole (5h) of a lower electrode (5), pressing the nut (N) from above to set the zero point of the positioning pin (8), and determining abnormality of the position of the nut (N) and abnormality of the equipment and so on in accordance with this zero point, a cycle comprising a sequence of setting the workpiece on the lower electrode (5), lowering the upper electrode (5), compressing the workpiece, (applying an electric current), and releasing the compression is automatically performed. The zero point is able to be automatically measured and set during this cycle when the position of the workpiece conforms with the standard position.
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