Variable cross-section opening grid supporting structure and generation method thereof

Abstract

The invention discloses a variable cross-section opening grid supporting structure and a generation method thereof. Opening grid supporting units are formed by arraying a plurality of grid units in different sizes, and a plurality of opening grid supporting units are overlapped so that support units are formed for changing the support form; the side walls of the opening grid supporting units are provided with grid openings penetrating through the opening grid supporting units horizontally so that a lateral powder discharging channel is formed; thus, powder in supports can be cleared completelyafter forming, and recycled before heat treatment after forming of parts; the printing rate is increased, and the post-processing difficulty is reduced; a cross-section structure is formed through three-dimensional drawing software, and the supports are arrayed and arranged according to the requirements; the powder that can not be cleared from the interior of a traditional grid support is clearedcompletely, and the usage amount of the forming powder is reduced; the printing rate is higher through design of the grip supports with lateral powder discharge, and the forming time is shortened; and the efficiency is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to a support in selective laser melting forming technology, in particular to a variable cross-section opening grid support structure and a generation method thereof. Background technique [0002] Selective laser melting forming technology is a rapid additive manufacturing forming technology. It uses laser heat source and accumulates layer by layer after powder coating to quickly realize the near-net shape of high-complexity parts. Given its layer-by-layer forming method, it is necessary to add grid support to its suspended surfaces, edges, points, and features that cannot be self-supporting to ensure the smooth forming of the parts, while achieving the required surface roughness and dimensional accuracy. [0003] Existing mesh supports such as figure 1 with figure 2 As shown in the figure, the grid support form included in the software is added for support, which is a vertical grid, and only the size of a single grid unit and t...

AI Technical Summary

Problems solved by technology

It is formed at the same time as the parts, connected up and down with the parts, or with the substrate. After the forming is completed, the powder in the grid cannot be removed, resulting in waste of materials and increased costs.

After heat treatment, the powder and grid support are fused together, which increases the difficulty of post-processing

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