Welding process for polygonal workpiece

The welding process comprises the following steps that S1, a first workpiece to be welded and a second workpiece to be welded are in butt joint, attached and fixed to form a welding area, spot welding is carried out on the welding area of the first workpiece and the welding area of the second workpiece to connect the first workpiece and the second workpiece, welding areas of the first workpiece and the second workpiece form a groove structure; s2, backing welding is conducted on the bottom face of the welding area along a welding seam; s3, filling welding is carried out around the welding seam until the welding seam is filled; and S4, cover surface welding. Continuous arc welding is carried out in a consumable electrode welding mode, and the whole circle is continuously welded without arc breakage. According to the welding process of the polygonal workpiece, the purpose of high-quality corner welding can be achieved, welding seams are uniform, and the welding quality is high. 本申请公开了一种多边形工件的焊接工艺，所述焊接工艺包括以下步骤：S