Method of manufacturing hollow octet truss structure through 3D printing

Abstract

The invention relates to a method of manufacturing a hollow octet truss structure through 3D printing. The manufacturing method comprises the following steps: 1) designing a hollow octet truss structural model, drawing a solid cube of which the size is 7mm by using graphic software, removing and converting the cube to obtain a solid rod piece octet truss structural model with the designed size, and performing conversion processing from a solid into a shell of a rod piece of the solid rod piece octet truss structural model to separately obtain the hollow octet truss structural model of which the side lengths are 14mm and 21mm; 2), calculating the relative density and air porosity of the hollow octet truss structural model; and 3), manufacturing the hollow octet truss structure through 3D printing. By adopting the truss structure, integrated printing molding is carried out by adopting 3D printing additive manufacturing, so that the advantage of a 3D printing technology and the performance of the structure can be fully developed. The hollow truss structure disclosed by the invention has the advantages of being lighter in self-weight, more reasonable in stress, and high in automation degree of the manufacturing process; and moreover, 3D printing can be carried out completely without needing any templates, and thus, an operation is simple and quick.

Description

technical field [0001] The invention relates to a truss structure used in aerospace, automobiles and bridges, in particular to a method for manufacturing a hollow octagon truss structure. Background technique [0002] Porous structures are widely used in aerospace, automobile manufacturing and other fields, such as octagon truss structures. The eight-couple truss structure mainly bears various functional loads in the items, and is the core part of the support of various items, and is also an important part of various items, and plays a very important role in the load resistance of the items. At present, most of the rods of the eight-couple truss structure mainly adopt a solid structure. The solid structure has the disadvantages of heavy weight, many materials required, complex assembly process, and difficult on-site operation. However, if the eight-couple truss structural member is made into a hollow member, not only the structural weight and cost can be reduced, but also t...

AI Technical Summary

Problems solved by technology

[0003] Due to the concept of lightweight, more and more are used in various fields. Among them, the octagonal truss multi-space structure is widely used. The octagonal truss structure used is generally a solid member. Although a part of the weight reduction has been achieved, the porosity is not high. Large, and when subjected to load, the deformation ability is not very strong

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