Method of preparing aluminum foam sandwich material by rotating friction extrusion and electromagnetic pulse hybrid process

A method for preparing an aluminum foam sandwich material by rotating friction extrusion and electromagnetic pulse hybrid process, comprising:

• step 1:
• preparing a filler, wherein a preparation method of the filler is to provide a matrix, open a plurality of holes on the matrix, and fill the plurality of holes with a foaming agent;
• step 2:
• processing the filler to prepare a plurality of preforms, wherein a preparation method of the plurality of preforms is to place the filler in a rotary friction extrusion die and extrude to form the plurality of preforms;
• wherein the rotary friction extrusion die comprises a mixing head, an upper die body, a lower die body and an extrusion rod;
• the upper die body is detachably connected to a top of the lower die body, a mold cavity is formed between the upper die body and the lower die body, and the lower die body is provided with an extrusion port through;
• the mixing head is rotationally connected to a top of the upper die body, and a bottom end of the mixing head penetrates the upper die body and extends into the mold cavity;
• the extrusion rod is equipped with two, and two feeding channels are further formed between the upper die body and the lower die body;
• the two feeding channels are communicated with the mold cavity, and the two extrusion rods are respectively slidingly connected in the two feeding channels;
• step 3:
• clamping and fixing the plurality of preforms to form a preform assembly, wherein the preform assemblies are clamped and fixed by the plurality of preforms according to a section shape of the aluminum foam sandwich material to be molded;
• step 4:
• welding a panel on a surface of the preform assembly to form a non-foaming sandwich material, wherein the panel and the preform assembly are welded by electromagnetic pulse welding;
• step 5:
• heating and foaming the non-foaming sandwich material through a foaming mold;
• step 6:
• insulating the foaming mold after a completion of foaming;
• injecting a cooling water into the foaming mold after a completion of insulation to maintain a pressure and a shape, forming the aluminum foam sandwich material of a required shape.