Section-variable metal lattice structure and machining method thereof

Abstract

The invention discloses a section-variable metal lattice structure and a machining method thereof. The section-variable metal lattice structure comprises a plurality of section-variable lattice units arranged in the space. Each section-variable lattice unit is formed by connecting a plurality of section-variable rod pieces. The section-variable metal lattice structure is formed by conducting sintering layer by layer through a laser melting technology. A working bin of a metal powder sintering machine is kept sealed before machining with nitrogen being protection gas. For the internal force characteristics of all parts of the rod pieces, the rod pieces of the metal lattice units are optimized. Compared with an even lattice structure formed by weaving and welding metal wires, the section diameter of the section-variable rod pieces in the section-variable lattice structure is accurately determined by the internal force condition needing to be met under the load condition, materials forming the section-variable rod pieces are increased or decreased according to the stress gradient in the section-variable rod pieces, powder materials are saved, and the light characteristic is improved.

Description

technical field [0001] The invention relates to a metal lattice structure, in particular to a variable cross-section metal lattice structure and a processing method thereof. Background technique [0002] Compared with other lightweight structures, the metal lattice structure has the characteristics of higher specific strength and stiffness. However, due to the limitation of traditional manufacturing methods, it has many units and complex structures, which makes the design and manufacture of metal lattice structures difficult. . However, the metal lattice structure manufactured by the traditional welding method and weaving method is relatively simple, and the optimal design has not been carried out for the stress conditions of different parts in the unit. [0003] With the development of additive manufacturing technology, especially the commercialization of selective laser melting technology, it has become a reality to print designed metal microstructures directly from metal...

AI Technical Summary

Problems solved by technology

However, the existing uniform lattice unit structure with constant rod diameter has a lot of consumables and heavy weight, so it is necessary to optimize the rod diameter according to the internal force characteristics of each part of the rod diameter, so as to realize a metal lattice that further improves its specific strength and specific stiffness. structure, in order to achieve the purpose of saving materials and improving mechanical properties

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