Causes and solutions of stamping wrinkling of metal shell

Metal shell plays an important role in modern product shell and occupies a considerable market share. In the enterprise production, there are many problems in the stamping of metal shell, which has been perplexing the technicians of the enterprise, and also has a great impact on the production progress. Among them, stamping wrinkling is a big problem.

The reasons for stamping wrinkling of metal shell are as follows:

(1) due to the large difference between the size in the thickness direction and the size in the plane direction of the material, the thickness direction is unstable and wrinkling occurs under the action of internal stress;

(2) the material is piled up and wrinkled, and the material entering the mold cavity is excessively wrinkled;

(3) uneven stretching parts are unstable and wrinkled.

Solution to stamping wrinkling of metal shell:

(1) pay attention to the rationality of the design when checking and reviewing the structure of aluminum alloy shell;

(2) in the parts where the aluminum alloy shell is easy to wrinkle, the suction bar is designed to be added;

(3) reasonably arrange the stamping process of aluminum alloy shell;

(4) check the rationality of die pressing plate and stretching surface;

(5) design the inner reinforcement to reduce the internal stress, relax and wrinkle;

(6) reasonably increase the forming process of aluminum alloy shell;

(7) replace raw materials and use materials with good formability.