US12722203 - Intelligent temperature control lattice structure based on 4D printing and application thereof

This patent describes an intelligent temperature control lattice structure created through 4D printing, featuring a lattice metal and a liquid storage chamber that work together to regulate temperature. The structure utilizes a selective laser melting manufacturing process and incorporates a nickel-titanium shape memory alloy, allowing it to automatically release cooling liquid when ambient temperatures reach a specified threshold.

Claim 1

1 . An intelligent temperature control lattice structure based on 4D printing, wherein the lattice structure comprises a lattice metal and a liquid storage chamber, wherein the lattice metal is an integral closed structure formed by extending a unit cell with a tetrakaidecahedron shell and six holes in connection, a diagonal length of openings of the lattice metal is 0.5 mm-2 mm, and the liquid storage chamber is in connection with the lattice metal; wherein the lattice structure is manufactured by a selective laser melting additive manufacturing process with following specific steps: step 1, carrying out process adaptability design on pore structure for the lattice structure with three-dimensional design software, and establishing a three-dimensional model of the lattice structure; step 2, slicing the three-dimensional model of the lattice structure established in step 1 with slicing software, and manufacturing the lattice structure using a selective laser melting additive manufacturing process characterized by a high volumetric energy density, a low laser power and a low scanning speed, wherein the high volumetric energy density is 250 J/mm 3 400 J/mm 3 , the low laser power is 60 W100 W, and the low scanning speed is 80~200 mm/s; the matrix material of the intelligent temperature control lattice structure is nickel-titanium shape memory alloy powder, and a mass fraction of nickel in the nickel-titanium shape memory alloy is 55.08%56.10%, and a particle size of the alloy powder is 15 m53 μm; step 3, carrying out solution treatment on the lattice structure obtained in step 2, wherein a temperature for the solution treatment is 800° C.1100° C., and a duration for the solution treatment is 1 h15 h; step 4, injecting cooling liquid into the liquid storage chamber and then closing the openings in the lattice metal by cold pressing under a normal temperature condition; when an ambient temperature excitation of the intelligent temperature control lattice structure reaches a preset response temperature of 15° C.80° C., the openings of the lattice metal automatically open, and the cooling liquid in the liquid storage chamber is ejected from the openings of the lattice metal to realize a temperature control function. wherein the lattice structure is manufactured by a selective laser melting additive manufacturing process with following specific steps: step 1, carrying out process adaptability design on pore structure for the lattice structure with three-dimensional design software, and establishing a three-dimensional model of the lattice structure; step 2, slicing the three-dimensional model of the lattice structure established in step 1 with slicing software, and manufacturing the lattice structure using a selective laser melting additive manufacturing process characterized by a high volumetric energy density, a low laser power and a low scanning speed, wherein the high volumetric energy density is 250 J/mm 3 400 J/mm 3 , the low laser power is 60 W100 W, and the low scanning speed is 80200 mm/s; the matrix material of the intelligent temperature control lattice structure is nickel-titanium shape memory alloy powder, and a mass fraction of nickel in the nickel-titanium shape memory alloy is 55.08%56.10%, and a particle size of the alloy powder is 15 m53 μm; step 3, carrying out solution treatment on the lattice structure obtained in step 2, wherein a temperature for the solution treatment is 800° C.1100° C., and a duration for the solution treatment is 1 h15 h; step 4, injecting cooling liquid into the liquid storage chamber and then closing the openings in the lattice metal by cold pressing under a normal temperature condition; when an ambient temperature excitation of the intelligent temperature control lattice structure reaches a preset response temperature of 15° C.~80° C., the openings of the lattice metal automatically open, and the cooling liquid in the liquid storage chamber is ejected from the openings of the lattice metal to realize a temperature control function.

Google Patents

https://patents.google.com/patent/US12722203

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12722203