Impact forming device and method for local small features on metal thin-walled curved-surface part

An impact forming device for forming local small features on a metal thin-walled curved-surface part, comprising impact forming dies, impact loading units and a forming supporting die, wherein

• each impact forming die is provided with an impact forming part, and the impact forming part is a convex part corresponding to a local small feature;
• the forming supporting die can support and fix a metal thin-walled curved-surface part without local small features, and the forming supporting die is provided with concave parts matched with impact forming parts;
• and
• each impact loading unit comprises a guide rail, an explosive ball and a detonating block, the detonating block and the explosive ball are both arranged in the guide rail, the explosive ball can be triggered through the detonating block to apply an instantaneous impact load to the impact forming die, and under an impact loading of the impact loading units, the impact forming parts can impact the metal thin-walled curved-surface part to form the local small features.