| 摘要 |
<p>The present application relates to a multielectrode gas-shielded arc welding method in which a filler wire is inserted between leading and trailing electrodes, a distance between the electrodes is 20 to 30 mm. Variables L, T, F, X, Y, ±, ², and ³ satisfy the following expressions: 40 �¢ ° ‰¤ L ‰¤ 60 �¢ ° 40 �¢ ° ‰¤ T ‰¤ 60 �¢ ° X + 5 �¢ ° ‰¤ F ‰¤ X + 20 �¢ ° or Y - 20 �¢ ° ‰¤ F ‰¤ Y - 5 �¢ ° 4 �¢ ° ‰¤ ± ‰¤ 14 �¢ ° 5 �¢ ° ‰¤ ² ‰¤ 15 �¢ ° - 5 �¢ ° ‰¤ ³ ‰¤ 5 �¢ °
where X represents the larger one of a leading-electrode horizontal angle L and a trailing-electrode horizontal angle T, Y represents the smaller one of the angles, F represents a filler-wire torch angle, ± represents a leading-electrode backward angle, ² represents a trailing-electrode forward angle, ³ represents a filler-wire torch forward or backward angle. A target position of the filler wire is within a range between a lower end of the vertical plate and a position at a height of (upper leg length - 2 mm) from the lower end.</p> |
