| 摘要 |
Disclosed in the present invention is a welding apparatus. According to the present invention, the welding apparatus comprises: a first welding tip which has a convex portion formed thereon; and a second welding tip which has a concave portion to be opposite to the convex portion wherein a sealing portion, as a relatively low temperature area, is formed on a portion corresponding to a circumference of the concave portion in a welding material which is formed, and a molten nugget portion grown on a center portion of the sealing portion. |
