Complex small-size single anchor box and manufacturing method

The invention relates to a manufacturing method of a complex small-size single anchor box adopting step-by-step unit manufacturing and layer-by-layer propelling assembly, each part of the single anchor box is composed of medium-thickness plates, the stiffening thickness is 24 mm, the thickness of an anchor web is 40 mm, and most of the interiors of the structure are penetration welds and partial penetration welds. In order to guarantee the assembly precision and the welding quality of the anchor box, a step-by-step manufacturing and layer-by-layer propelling assembly method is systematically researched and developed, the problems that in the prior art, an anchor box is complex in structure, compact in construction, small in operation space, dense in welding seam, high in geometric dimension precision requirement and large in assembly and welding difficulty are solved, welding seam welding between parts of the anchor box is achieved, and the welding quality of the anchor box is improved. In addition, the assem