US 11,925,977 B2
Method of preparing aluminum foam sandwich material by rotating friction extrusion and electromagnetic pulse hybrid process
Jilin Xie, Nanchang (CN); Jinyang Hu, Nanchang (CN); Yuhua Chen, Nanchang (CN); Timing Zhang, Nanchang (CN); Limeng Yin, Nanchang (CN); Xiao Song, Nanchang (CN); Shanlin Wang, Nanchang (CN); and Jiaming Ni, Nanchang (CN)
Assigned to NANCHANG HANGKONG UNIVERSITY, Nanchang (CN)
Filed by Nanchang Hangkong University, Nanchang (CN)
Filed on Apr. 19, 2023, as Appl. No. 18/136,343.
Claims priority of application No. 202210429188.6 (CN), filed on Apr. 22, 2022.
Prior Publication US 2023/0339016 A1, Oct. 26, 2023
Int. Cl. B22D 25/00 (2006.01); B22F 3/11 (2006.01)
CPC B22D 25/005 (2013.01) [B22F 3/1125 (2013.01)] 4 Claims
OG exemplary drawing
 
1. 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.