Device and method for reducing hydro-mechanical deep drawing force of large-size plate component

Abstract

The invention provides a device and method for reducing hydro-mechanical deep drawing force of a large-size plate component, and relates to a forming device and method for thin-wall deep-cavity curved-surface plate component in order to solve the problems that during hydro-mechanical deep drawing of the large-size plate component, reactive force of liquid media is large, and accordingly equipment tonnage is large and energy consumption is high. The device comprises male die, an edge pressing ring, a female die, a liquid chamber and a back pressing die. The upper surface of the back pressing die is an inwards concave curved face, the curved face and the part, corresponding to the female die above, of the curved face are identical in shape, and the side wall of the back pressing die can slide up and down along the side wall of a large through hole in the bottom of the liquid chamber. When the male die moves downwards to a certain depth, the lower surface of a slab makes contact with the upper surface of the back pressing die and is completely attached to the upper surface of the back pressing die, the back pressing die moves downwards along with the male die and clamps the slab at the same time, the attached portion of the slab is not affected by high-pressure liquid, only the portion, in the annular area of the outer side of the back pressing die, of the lower surface of the slab is subjected to action of the high-pressure liquid, and hydro-mechanical deep drawing force is reduced because the action area of the high-pressure liquid on the male die is reduced.

Description

technical field [0001] The invention relates to a deep-cavity plate member forming device and method, in particular to a liquid-filled deep-drawing forming device and method for a large-sized thin-walled deep-cavity curved plate member. Background technique [0002] Liquid-filled deep drawing of sheet metal adopts liquid medium instead of mold to transmit load, so that the sheet is pressed against the punch under the pressure of the liquid medium. While controlling the pressure of the liquid medium and the blank holder force, the punch is moved down to pull the sheet into the concave. Die to realize the forming of thin-walled sheet components ( figure 1 - traditional schematic). In the process of liquid-filled deep drawing, the liquid pressure in the liquid chamber is used to make the material against the punch avoid thinning and cracking under the action of "friction retention", and a certain liquid pressure is used to form a "liquid" between the plate and the die. "Lubri...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a device and method for reducing the liquid-filled deep-drawing force of large-sized plate components (the ratio of slab thickness to slab diameter ≤ 0.3%), so as to solve the problem of liquid medium when large-sized plate components are liquid-filled deep-drawn. Large reaction force leads to large equipment tonnage and high energy consumption

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