| 摘要 |
PURPOSE:To efficiently produce metal powder by finding end position at arc side of each electrode by an image pickup device at the time of producing the metal powder by forming arc between consumable electrodes and automatically adjusting the end position. CONSTITUTION:The arc 3 is generated between the consumable electrodes 7 in a chamber 6, and dripping 4 is formed by melting the faced end parts of electrodes 7 and dropped on a rotating disk 8, to form the powder 5 by scattering. Then, an electrode end position measuring instrument 17 composing of the image pickup device 11 and an arc position arithmetic unit 13 positioning just above the end part at arc side of the electrodes 7 as main body, is arranged and radiance of the electrodes 7 is detected by the image pickup device 11 through a measuring opening 12. The arc position arithmetic unit 13 obtain temp. distribution of each electrode 7 from detected signal of the image pickup device 11 and the end position at arc side of each electrode 7 is found from this temp. distribution, and the electrodes 7 are shifted so that the end part at arc side of each electrode 7 comes to the prescribed position by each electrode shifting means 14. In this way, the dripping 4 is surely dropped on the disk 8 and the metal powder 5 is efficiently produced.
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