Corrugated pipe end straight edge expanding die for storage box and forming method

The invention provides an end straight edge expanding die for a corrugated pipe for a storage box and a forming method. The forming method comprises the following steps of die mounting, straight edge forming, complete annealing, straight edge forming and allowance removing. The method has the beneficial effects that the straight edge expanding forming method for the end part of the corrugated pipe for the storage tank is formed by carrying out the design of the straight edge expanding die for the end part of the corrugated pipe for the storage tank and establishing the forming path and the process parameter window, the investment of large tools and equipment is obviously reduced, the forming precision and the surface quality are effectively ensured, and the production efficiency is improved. 本发明提供了一种贮箱用波纹管端部直边扩径模具及成形方法，包括以下步骤：安装模具→成形直边→完全退火→成形直边→去除余量。本发明有益效果：通过开展贮箱用波纹管端部直边扩径模设计，建立成形路径和工艺参数窗口，形成了贮箱用波纹管端部直边扩径成形方法，显著降低大型工装和装备投入，有效保证成形精度及表面质量，提升生产效率。