The packaging method of automobile side wall is 1. The process ⑷ A new process scheme and die structure are adopted for the side flanging at the corner where the side wall and the back door overlap. A pair of dies and a wedge mechanism are used to complete the two kinds of side flanging, which saves a lot of manufacturing costs and improves the product quality. This paper mainly introduces the technological design and structural principle of the inclined wedge mechanism with side flanging floating block. 2. Enlarged schematic diagram of the corner where the side wall overlaps with the back door. Its main feature is that both corner lap and straight lap need to use side flanging wedge. If the traditional wedge mechanism is used on a pair of dies, 3. Flanging on both sides needs to be carried out at the same time. Because of the particularity of its shape and the different flanging amount, it will lead to serious wrinkling at the corner lap, which is difficult to eliminate and cannot meet the basic requirements of product quality. If the traditional wedge mechanism is used in two sets of molds, good appearance quality can be obtained, but the manufacturing cost will be doubled.