| 摘要 |
<p>An apparatus for reducing the blow hole of a weld bead comprises: an arc welder for generating an arc in the welding direction of a galvanized steel sheet to carry out the welding of the galvanized steel sheet; an auxiliary heater arranged at a distance from the rear side of the arc welder in the welding direction to increase the freezing time of molten steel formed in the welding direction by the arc welder; and a connection part extended in the welding direction and arranged to connect the arc welder to the auxiliary heater.</p> |
