| 摘要 |
PURPOSE:To increase the efficiency in welding work by passing the low starting current of the specified rate compared with the main current prior to passing the main current. CONSTITUTION:The starting current 3 at the lower value of 1/4-3.4 of a main current 2 is passed by utilizing a timer and relay for 0.1-3sec prior to passing the maincurrent 2. A stabilized small arc is first generated with the starting current of lower current value at the welding start time, then a large main arc is generated. The spatter caused in case of starting with large current can therefore be reduced sharply. Due to the drastic reduction in the spatter generation the spatter removing and prepolishing for painting works in the welding after stage can be reduced or omitted. The efficiency in welding work is therefore increased.
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