A support structure and manufacturing method for metal additive manufacturing

Abstract

A support structure and manufacturing method for metal additive manufacturing, wherein the support structure is composed of a plurality of hollow columnar units perpendicular to the construction plane, and all sides of the column walls of the hollow columnar units are provided with through holes, wherein the manufacturing The method includes: merging the supporting structure and the data information of the processed workpiece, and slicing the merged graph layer by layer to obtain the scanned graphic information of the single-layer cross-section of the merged graph, and importing the scanned graphic information of the single-layer cross-section into the additive manufacturing equipment through layer-by-layer manufacturing The workpiece and its supporting structure can be obtained. With this structure, the metal powder inside the support structure can be cleaned and recovered conveniently, and supports with different strengths can be produced according to needs, thereby improving the utilization rate of the powder and reducing the manufacturing cost.

Description

technical field [0001] The invention relates to metal additive manufacturing technology, in particular to a support structure for metal additive manufacturing technology. Background technique [0002] Metal additive manufacturing generally forms three-dimensional workpieces by melting and connecting layers of powdered metal materials. This technology can manufacture metal workpieces with complex shapes that are difficult to complete with traditional techniques. However, in some special structures, especially overhanging structures, overhangs and warping deformation will occur during this process, which will affect the shape accuracy and dimensional accuracy of the workpiece, and even lead to construction failure in severe cases. At present, the stability of the construction process is often ensured by designing the external support structure, and the support structure is removed by wire cutting after the workpiece is built. The manufacture of support structures, like the ma...

AI Technical Summary

Problems solved by technology

[0003] In the existing metal additive manufacturing technology, the design of the support structure often adopts a two-dimensional grid structure. By adjusting the distance between the support structure units (that is, the distance between the grid lines) and the distance between the support structure and the workpiece tooth-shaped structure to adjust the strength of the support structure, but usually the sides of the support structure unit of this grid structure are closed, and the powder inside the support structure unit cannot be effectively cleaned out and reused during post-processing, thus causing a large material waste

There are also designers who want to design the least material to make the support structure, but as the complexity of the support structure increases, the manufacturing efficiency of the workpiece and the strength of the support structure during the manufacturing process will change.

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