Die blank holder device and application method thereof

Abstract

The invention discloses a die blank holder device and an application method thereof. The die blank holder device comprises a shell and a die body. The die body comprises a male die, a female die, a magneto-rheological elastomer blank holder, an excitation coil, a coil framework and a permanent magnet. The excitation coil is wound on the coil framework; the permanent magnet is fixedly arranged in the coil framework; the magneto-rheological elastomer blank holder is arranged in the coil framework and is fixedly connected with the permanent magnet; the female die is arranged at the inner side ofthe magneto-rheological elastomer blank holder, and the male die is connected with a stamping mechanism to stamp a plate on the female die; the excitation coil generates a magnetic field after being electrified; and the size of the magnetic field is controlled, and the rigidity of the magneto-rheological elastomer blank holder is adjusted so as to control the blank holding force and the distance between the magneto-rheological elastomer blank holder and the plate. By means of the material characteristics of the magneto-rheological elastomer, the blank holder force in deep drawing forming is controlled, a workpiece is prevented from being broken in deep drawing forming, the workpiece forming rate is increased, lubrication is not needed, the cost is reduced, the structure is compact, and thepracticability is high.

Description

technical field [0001] The invention relates to the field of deep drawing dies, in particular to a die blank holder device and an application method thereof. Background technique [0002] Deep-drawing is an important way of sheet metal forming. The inventors of the present application found that in the process of deep-drawing forming, when using a stamping mechanism to punch a sheet to obtain a workpiece structure with a complex shape, the control of the blank-holding force on the edge of the fixed sheet is very important. High requirements, if the blank holder force is too large, it will easily lead to cracking of the workpiece, if the blank holder force is too small, the sheet will warp and wrinkle, therefore, setting a binder ring between the punch and die can deal with the wrinkling and cracking of the workpiece edge Two questions. At present, the commonly used blank holders are mainly elastic and rigid. The elastic blank holder includes spring blank holder and rubber b...

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Problems solved by technology

[0003] The embodiment of the present application provides a mold blank holder device, which solves the problem that the blank holder force cannot be accurately controlled in the deep drawing of the prior art. By using a magnetorheological elastomer blank holder, by changing the applied magnetic The size controls the blank-holding force of the magnetorheological elastomer blank-holder ring on the edge of the sheet during deep drawing

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