Device for assisting metal rolling process with low electrothermal and high density pulse current

Abstract

A device for the metal rolling process assisted by low-electric-heat high-density pulse current mainly comprises an upper roller, conductive sleeves, screws, insulating sleeves, wiring boards, a pulse power supply, an electric lead, rolled parts, a lower roller, return conductors and limiting plates. According to the device, the interference of large loop resistance of an external power source on the rolling process of the rollers is avoided. The number of components of a pulse current loop is small, resistance is small, the large current density can be obtained by plastic deformation zones of the rolled parts under the same power source power and the same rolling condition, and therefore pure electro-plastic rolling of metal can be achieved. The device is simple and practical in structure, low in energy consumption and suitable for hard-to-deform metal which needs to be rolled at the normal temperature.

Description

technical field [0001] The invention relates to a device for assisting metal rolling process with low electric heating and high density pulse current. Background technique [0002] In the electroplastic rolling process of metals, high-density pulsed current must be introduced into the plastic deformation zone of the metal rolled piece. The existing experimental research results show that the current density must reach a certain threshold in order to obtain obvious electroplastic effects. , and the greater the current density, the more obvious the electroplastic effect, usually the current density value should reach 1000A / mm 2 above. At present, the electroplastic rolling is to set the pulse power supply outside the rolling mill, and then use the wire to introduce the current into the rolled piece. For example, the authorized announcement number is: CN202438539U, and the invention name is "Electroplastic Processing Equipment". It is recorded that "the first roll shaft and t...

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Problems solved by technology

[0003] The power-on methods mentioned in the above patents are not only complex in structure, but also connect a large number of components in the pulse current loop, resulting in large loop resistance and low current intensity, which greatly reduces the pure electroplastic effect of the metal. At this time, only Electric heating can be increased by increasing the pulse width and frequency to reduce metal plasticity, but this method is not suitable for difficult-to-deform metals that require the rolling process to be completed at room temperature

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