Leftover-material free punching technology and die thereof

The utility model discloses a leftover-material free punching technology and a die thereof. The die includes an upper template, a lower template, a first outward folding die, a second outward folding die, a third pressing die, and a fourth cut-off die. The structures of the first outward folding die and the second outward folding die are completely the same, and the directions of the first outward folding die and the outward external folding die are at an right-angle relation, the first outward folding die is used for punching the two opposite side walls of a rectangular semi-finished product in the X-direction, and the second outward folding die is used for punching the two opposite side walls of the rectangular semi-finished product in the Y-direction. According to the utility model, a housing and a material strap are separated in a lateral cutting manner, the defect that the four corners of the housing fold outwards can be overcome, the size precision of products is high. And moreover, waste materials gene