Punching device

A punching device comprises an upper die base and a lower die base, an upper punching mechanism is fixed to the upper die base, a lower punching mechanism is fixed to the lower die base, the lower punching mechanism comprises a lower clamping plate and a padding block, the padding block is used for bearing materials, and a plurality of lower punching knives arranged at intervals are distributed on the lower clamping plate along the periphery of the padding block. The outline defined by the multiple lower punching knives is matched with the outline of materials, the upper punching mechanism comprises an upper clamping plate and a material pressing block, the material pressing block is used for fixing the materials to the padding block, the upper die base can drive the upper clamping plate to move downwards, and the upper punching knives and the lower punching knives are matched to cut the portions, extending out of the padding block and the material pressing block, of the materials. According to the punching d