Electroplastic incremental forming device for plate and working method thereof

Abstract

The invention discloses an electroplastic incremental forming device for a plate and a working method thereof, and belongs to the field of metal processing. The device comprises a machine tool and a pulse power supply, wherein a plate clamping device is fixed on a workbench of the machine tool; a clamping block, an electric brush holder and a retainer are arranged on a main shaft of the machine tool; the clamping block is connected with a tool head used for processing the plate; the electric brush holder is L-shaped, one end of the electric brush holder is fixed on the main shaft, and the other end of the electric brush holder is connected with an electric brush used for being abutted against the clamping block; the retainer is U-shaped, one end of the retainer is fixed on the main shaft, and the other end of the retainer stretches to a place below the plate and is connected with a lower press head used for being abutted against the lower surface of the plate; the tool head faces the lower press head; and the two poles of the pulse power supply are connected with the electric brush and the lower press head respectively. The electroplastic incremental forming device for the plate disclosed by the invention is simple in structure, easy to control, and low in processing cost; the forming accuracy of the plate is high; and the forming limit and the forming quality of the plate are increased and improved.

Description

technical field [0001] The invention relates to the field of metal processing, in particular to a sheet metal electroplastic progressive forming device and a working method thereof. Background technique [0002] The electroplastic effect is a phenomenon in which the deformation resistance of materials decreases and plasticity increases under the action of electricity (including electrical stimulation such as electron irradiation, electric field, and current pulse). Using the electroplastic effect can not only reduce the flow stress, improve the plasticity of the material, but also improve the structure and properties of the product to a certain extent, and at the same time avoid many shortcomings of heating and heat treatment, and reduce equipment costs. The electroplastic effect is the result of various physical effects such as Joule heating effect, magnetic compression effect, skin effect and pure electroplastic effect. The high-density moving electrons flowing through th...

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Problems solved by technology

[0005] However, this device uses two sets of motion mechanisms (spindle and six-axis robot processing system) to control the upper forming ram and the lower forming ram respectively. The structure is complex and difficult to control. The six-axis robot processing system is used, and the processing cost is relatively high; The kinematic mechanism of the sleeve is prone to error, which makes the positions of the upper forming indenter and the lower forming indenter deviate, and they cannot always face each other. It is impossible to ensure that the direction of the current is always consistent with the deformation direction of the sheet metal. The electroplastic effect is the most significant when the pulse current is applied, and the processing resistance is the smallest. Therefore, the processing resistance of the device will vary with the error and cannot be guaranteed to be the smallest, resulting in low sheet metal forming accuracy; the upper forming head of the device passes through the upper forming head fixing block It is directly connected to the wire and cannot rotate. The upper forming pressure head has a large lateral processing resistance, and the sheet is easy to tear and scratch the surface, which reduces the forming limit and quality of the sheet.

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