Electric auxiliary bulging device for special-shaped parts

Abstract

The invention discloses an electrical auxiliary bulging device for special-shaped parts. The device comprises a male mold, a female mold, a blank holder and a sleeve. The female mold is arranged in the sleeve. The blank holder is arranged on the upper end of the female mold and is used to press the outer edge of a cylindrical plate material arranged in the female mold. The male mold is above the center of the female mold in an up-down lifting mode, and can be seamlessly embedded in the blank holder. The inner part of the blank holder is provided with an electrode a. The lower end of the electrode a is in contact with the outer edge of the cylindrical plate material, and the other end is connected to a positive electrode of a power supply. The cylindrical plate material is filled with a mixture of particles and viscous fluid. The two sides of the side wall of the female mold radially drill holes at different heights and install an electrode b. One end of the electrode b is provided witha spring and connected to a negative electrode of the power supply, and the other end contacts the inner wall of the cylindrical plate material. The device solves the problems of low plasticity, highstrength, and difficult-to-deform cylindrical plate material in the asymmetric bulging process, such as difficulty in forming, cracking, residual stress and the like, and improves the forming limit capacity of the cylindrical plate material.

Description

technical field [0001] The invention relates to the field of stamping technology and electronic technology, in particular to an electric auxiliary bulging device for special-shaped parts. Background technique [0002] The shape of the parts produced in the traditional bulging process is mostly symmetrical, and the forming mold and force are relatively simple. For some asymmetric cylindrical special-shaped parts, the force is complicated and the forming is difficult, which often causes the quality of the parts to be substandard. And for some hard-to-deform, high-strength, low-plastic parts, they can’t even be formed or even broken; further improvement of the solid particle medium forming process overcomes the defects of hydroforming, but there are new problems, the parts cannot be automatically ejected after forming, and the particles The gap between the convex and concave molds is full, and it is extremely difficult to remove manually. The ejection mechanism is not clear, an...

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is to provide an electric-assisted bulging device for special-shaped parts, which realizes the improvement of the existing bulging forming process of special-shaped parts, and combines it with the external electric field, particle and viscous fluid mixture forming technology to solve the problem. Low plasticity, high strength, hard-to-deform tensile sheet in the process of asymmetric bulging, difficult to form, crack, residual stress and other problems

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