Cylindrical part rolling and liquid-filling deep-drawing forming device and method

Abstract

The invention discloses a cylindrical part rolling and liquid-filling deep-drawing forming device. The cylindrical part rolling and liquid-filling deep-drawing forming device comprises a rolling maledie, a female die and a blank holder, and a conical rolling face is arranged at the end of the rolling male die; the rolling male die can move in the axial direction and the radial direction of an inner cavity of the female die and can rotate around the center axis of the rolling male die and the center axis of the inner cavity of the female die; and the female die is provided with a channel usedfor filling an inner cavity of the female die with a liquid medium, and the channel is provided with a liquid-filling valve. The invention further discloses a cylindrical part rolling and liquid-filling deep-drawing forming method which adopts the cylindrical part rolling and liquid-filling deep-drawing forming device to carry out deep-drawing forming on a plate. According to the cylindrical partrolling and liquid-filling deep-drawing forming device and method, local deep drawing is applied to the plate by swinging the rolling male die, and then overall deep drawing of a part is completed. Inthe deep drawing process, liquid pressure is applied to the other face of the plate, the stress state of the plate is improved, the forming limit of the plate and the forming quality of the part canbe effectively improved, and cost is saved.

Description

technical field [0001] The invention belongs to the technical field of metal processing, and in particular relates to a device and method for rolling, liquid-filled and deep-drawing of cylindrical parts. Background technique [0002] At present, the deep drawing process is used to manufacture metal cylindrical parts, which has the advantages of high productivity, high material utilization rate and low production cost, and is widely used in the fields of automobiles, instrumentation, electronics and aerospace. [0003] However, due to the characteristics of the process itself, the friction between the mold and the metal sheet, especially the blankholder exerts a blankholding force on the sheet. If the pressure exerted by the blankholder is too small, the flange area is prone to instability and wrinkling. If the blank holder force is too large, the friction between the mold and the sheet is too large, restricting the flow of material from the flange area to the die, resulting ...

AI Technical Summary

Problems solved by technology

[0003] However, due to the characteristics of the process itself, the friction between the mold and the metal sheet, especially the blankholder exerts a blankholding force on the sheet. If the pressure exerted by the blankholder is too small, the flange area is prone to instability and wrinkling

If the blank holder force is too large, the friction between the mold and the sheet is too large, restricting the flow of material from the flange area to the die, resulting in problems such as cracking and uneven wall thickness of the cylindrical part during the deep drawing process.

[0004] Therefore, for cylindrical parts with large drawing coefficient and large height-to-diameter ratio, the material flow is difficult and the deformation is uneven. Using traditional deep drawing requires multiple sets of molds for multiple drawing, resulting in low manufacturing accuracy of such cylindrical parts. , Increased production cost and extended production cycle

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