Novel stretching forming die with self-adaptive adjustable punch

The utility model discloses a novel stretch forming die with a self-adaptively adjustable punch, which comprises an upper moving die, a lower moving die, a first nitrogen spring, a sliding punch, a second nitrogen spring, a second nitrogen spring, a third nitrogen spring, a fourth nitrogen spring, a fifth nitrogen spring, a sixth nitrogen spring, a fifth nitrogen spring and a sixth sliding punch, and the lower fixed die is located under the upper movable die, a lower die assembly used for containing a workpiece is arranged on the lower fixed die, a plurality of guide columns are arranged at the positions, close to the outer edge of the lower fixed die, of the lower fixed die, and the multiple linear bearings are in sliding connection with the multiple guide columns correspondingly. Through bouncing and callback of the first nitrogen spring, the sliding punch can be self-adaptive to the paint thickness change of the high-brightness black-surface stainless steel band, the position of the sliding punch can be au