A kind of forming device and method for electric pulse assisted pipe shrinking and thickening

Abstract

The invention relates to a forming device and method for assisted pipe necking and thickening by electric pulses. The device comprises: a connecting piece, which is connected with the lower surface of the top of the forming device; a pusher, which is connected with the connecting piece; the lower surface of the pusher; the electrode plate, which is arranged below the first insulating gasket; the electrode shrapnel, which is arranged in the opening of the electrode plate; the ceramic mold, which is arranged below the electrode plate, and the bottom of the tube blank is inserted into the ceramic mold; The second insulating gasket is arranged under the ceramic mold; the support frame is arranged under the second insulating gasket; the constricted electrode rod is arranged in the cavity of the ceramic mold and passes through the top of the ceramic mold and the support frame ; Copper nose, which is arranged below the necked electrode rod and in contact with the necked electrode rod; Jack, set under the copper nose; Power supply, the positive electrode is connected to the electrode plate, and the negative electrode is connected to the copper nose. In the present invention, the above-mentioned device can increase the thickening thickness of the pipe, and is small in size and low in cost.

Description

technical field [0001] The invention relates to the field of pipe shrinkage thickening, in particular to a forming device and method for electric pulse-assisted pipe shrinkage thickening. Background technique [0002] The tube shrinking and thickening technology is a plastic forming technology that reduces the diameter of one end of the tube blank and increases the wall thickness. Significantly improve the level of aircraft lightweight. The manufacturing principle is to improve the plasticity of the pipe, extrude one end of the pipe into the mold to realize the thickening of the neck, and use the high temperature gradient between the deformation zone and the non-deformation zone to increase the thickening thickness. The thickened part of the finished pipe needs to be tapped and threaded with other components in future use. Therefore, the greater the thickening thickness of the finished pipe, the better the reliability of the threaded connection and the higher the quality of...

AI Technical Summary

Problems solved by technology

The traditional necking and thickening technology uses mold heating to improve the thermoplasticity of the pipe. The mold heating in the deformation zone and the liquid cooling in the non-deformation zone achieve a high temperature gradient, but the thickening thickness is limited, and the manufacturing equipment includes hydraulic presses, necking molds, Heating rods, liquid cooling equipment, etc. have the disadvantages of high equipment cost and long construction period

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