| 摘要 |
PURPOSE:To reduce the burden of a worker, and to execute stably welding by detecting a welding speed, and controlling automatically a welding condition, based on its detected value. CONSTITUTION:A welding wire 4 is fed into a groove through a chip 5 and welding is executed, and simultaneously, a welding truck 8 loaded with a sliding copper patch 3 and the chip 5 runs automatically on a rail 9 as welding advances. In this case, a welding speed detector 10 which has been attached to the truck 8 outputs a running signal, and the running signal is converted to a signal for showing as average welding speed through a converter 11, and inputted to a comparator or an operator 12. The comparator 12 compares said signal with a set reference value, and selects such welding conditions as appropriate wire feeding speed, welding current, welding voltage, etc. In this way, the appropriate welding condition can be determined automatically from the welding speed.
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