Drawing mould

Abstract

The invention relates to a drawing mould, belonging to the field of moulds; the drawing mould comprises a concave mould structure, a blank holder structure and a male mould structure; when the drawing mould is working, a male mould shaft is driven to rotate through a pair of bevel gears and keys; the concave mould is dropped; the blank holder structure is located at a non-working state; when the concave mould is close to the blank holder structure, hydraulic pressure of a blank holder makes a plate material closely attached to a lower rotary disc structure and a concave mould, then, the plate material, the lower rotary disc structure and the concave mould are dropped; when a plate piece is contacted with the male mould shaft, the male mould shaft drives the plate piece to rotate; the concave mould, an upper rotary disc structure and the lower rotary disc structure are driven to rotate by the plate piece; simultaneously, the concave mould and the lower rotary disc structure are dropped continuously until drawing is formed. After using a technical proposal provided by the invention, an ultimate drawing coefficient of the plate material can be reduced; potentiality of material is developed completely; a demand on a material forming performance is lowered; expensive plate material, specifically advanced high-strength plate material is saved greatly.

Description

technical field [0001] The invention relates to a drawing die, in particular to a rotary drawing-in drawing die with adjustable blank-holding force, which belongs to the field of dies. Background technique [0002] Deep drawing is one of the commonly used processes in sheet metal stamping forming. How to reduce the drawing coefficient and develop the potential of sheet metal has always been the focus of stamping forming performance research and stamping die design. In the process, the required drawing parts are often obtained by drawing the sheet into the die. Generally, the drawing die is fixed, the elastic element acts as a blank holder to compress the sheet, and the punch moves to pull out the required product. The problems of this type of mold are: (1) The way the sheet is pulled in is single, resulting in high friction and increased possibility of wrinkling and cracking during deep drawing; (2) The blank holder force curve for deep drawing is fixed and can only Adaptin...

AI Technical Summary

Problems solved by technology

The problems of this type of mold are: (1) The way the sheet is pulled in is single, resulting in high friction and increased possibility of wrinkling and cracking during deep drawing; (2) The blank holder force curve for deep drawing is fixed and can only Adapting to a sheet of one thickness, it will be difficult to adjust the blank-holding force when the thickness of the sheet changes. For sheets of the same thickness, the curve of the blank-holding force cannot be coordinated with the curve required by the material forming, and it is difficult to exert the forming potential of the sheet

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