Method and device for carrying out warm forming on light alloy sheet metal part by taking thermal expansion graphite as force transfer medium

The invention discloses a method and device for warm forming of light alloy sheet metal parts with thermal expansion graphite as a force transfer medium, and belongs to the field of warm forming of light alloy sheet metal parts. The method for warm forming of the light alloy sheet metal part with the thermal expansion graphite as the force transfer medium comprises the steps that the thermal expansion graphite is added into the rigid medium bin, and the space between a light alloy plate blank and a plunger is filled with the thermal expansion graphite; and the light alloy plate blank is arranged between the rigid medium bin and the rigid die and heated to the forming temperature, heat preservation is conducted, after the temperature is stable, the moving speed of a plunger is controlled, plate blank forming, heat preservation, cooling and die opening are assisted, and a formed part is obtained. The corresponding warm forming device comprises the forming die and the heating device. According to the method, the