Part punching method for aluminum alloy plate subjected to local copious cooling

The invention provides a part punching method for an aluminum alloy plate subjected to local copious cooling. The method comprises the steps that 1, an aluminum alloy strip is processed in a sheet shape; 2, the processed material is subjected to local copious cooling by using cooling nitrogen gas, and the temperature is lowered to be -150 DEG C--100 DEG C; 3, the material obtained after local copious cooling is subjected to part punching, and a high-performance aluminum alloy punching part is obtained. By means of the method, the mechanical property of an existing aluminum alloy part punchingpiece can be improved, the product weight is reduced, the service life of a workpiece is prolonged, and the high-performance aluminum alloy punching part is obtained. 种铝合金板带局部深冷的零件冲压方法，第步：将铝合金带材加工成片状；第二步：采用冷却氮气将加工后的材料进行局部深冷，冷却到-150℃～-100℃；第三步：对局部深冷处理的材料进行零件冲压，得到高性能的铝合金冲压零件。本发明可以提高现有铝合金零件冲压件机械性能，降低产品重量，延长工件使用寿命，得到高性能铝合金零件冲压件。