An ultra-thin plate deep drawing anti-wrinkle and anti-cracking process and its mold

Abstract

The invention provides a deep stretching anti-wrinkle and cracking-resistant process for ultra-thin plates and a mold thereof. The mold comprises an upper mold seat and a lower mold seat, wherein a lower supporting plate is arranged under the lower mold seat; an upper mold plate is arranged under the upper mold seat; three stretching punches are arranged under the upper mold plate; a lower mold plate is arranged on the lower mold seat; three stretching concave mold bodies are arranged in the lower mold plate; the stretching punches are matched with the stretching concave mold bodies in shape; the stretching concave mold bodies correspond to the stretching punches above in position; an inner demolding part is arranged in each stretching concave mold bodies; springs are arranged between the inner demolding parts and the lower supporting plate; and a pressing plate is arranged below the stretching punches and provided with edge pressing rings, and the edge pressing rings are located on the peripheries of the stretching punches. Materials to be stretched can flow into a forming mold cavity with sufficient size to be stretched so that the purpose of deep stretching of ultra-thin materials can be realized. The added edge pressing rings are used for shaping the roots of the stretched products, and the problem of wrinkling of the products is solved.

Description

technical field

[0001] The invention relates to a mold. Background technique

[0002] When conventional ultra-thin sheet is stretched, due to the thinning of the material during stretching or the uneven pressing force of the mold during the initial pressing process, the product will crack or wrinkle after stretching. Thin necks tend to appear prematurely and too quickly during thinning and stretching. Due to the stacking and uneven flow of materials and the high temperature in the mold during stretching, the material hardens, making it premature in the stretching process. Cracking occurs, which is especially obvious when rectangular stretching is formed. Due to the uneven flow direction of the material, if the pressing force is uneven or the pressing force is too small or too large, the product will not be stretched ideally or the process connection of the stretching process will not achieve the ideal effect, so that deep drawing cannot be achieved. stretched state. Stack...

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