Springback compensation method of thin-wall stamped part with large relative bending radius

The invention relates to a springback compensation method of a thin-wall stamped part with large relative bending radius. The springback compensation method comprises the following steps: analyzing the springback of the stamped part by adopting finite element software to obtain a first springback compensation; correcting a mould, and carrying out springback analysis to obtain a second springback compensation; correcting the mould again, and carrying out springback analysis to obtain a third springback compensation; carrying out comparison analysis and judging whether the size precision requirement is met or not; and if not meeting the size precision requirement, continuing the process till the size precision requirement is met. According to the springback compensation method disclosed by the invention, the size of the part subjected to springback is finally close to the size required by the part in theory by means of circulation proceeding of springback analysis, springback compensation and springback analysis, simulation mould repair and gradual approach, and then, the practical springback is reduced through experiments, so that the purpose of less mold repair, even no mold repair is achieved; the development period of a product is shortened, and the development cost is lowered. The springback compensation method belongs to the field of sheet metal working and is applicable to forming the thin-wall stamped part with relatively large relative bending radius.