An Auxiliary Supporting Structure Suitable for Inclined Overhanging Thin-Walled Structures

Abstract

The invention provides an auxiliary support structure suitable for inclined and suspended thin-walled structures, which is used in the laser selective melting and additive manufacturing process to support the inclined and suspended thin-walled structures on the substrate, and is particularly suitable for inclination angles greater than 45 degrees, An inclined overhanging thin-walled structure with a certain distance from the substrate and a thickness of less than 3.5mm; the present invention adopts a grid support between the overhanging end and the formed substrate, and adopts a sheet-type solid support on the back of the overhanging thin-walled structure, and the grid support and the solid The support is fixed and connected to form a whole; it can avoid defects such as warping deformation and interlayer misalignment in the overhanging part, and the grid support part will not appear "cracking" and "breaking" and cause problems such as "collapse" in the overhanging part; support removal Compared with the overall physical support, the difficulty and workload, production cycle and cost are greatly reduced or lowered.

Description

technical field [0001] The invention relates to the technical field of laser selective melting and additive manufacturing, in particular to an auxiliary support structure suitable for inclined and suspended thin-walled structures. Auxiliary support. Background technique [0002] Laser selective melting additive manufacturing technology, based on alloy powder layer-by-layer melting and forming to manufacture complex parts, has unique advantages in the overall manufacturing of complex cavities, profiles, thin-walled, and variable-section parts of difficult-to-machine metals such as titanium alloys and high-temperature alloys. [0003] At present, the auxiliary support of laser selective melting additive manufacturing parts is mainly designed as an overall solid or overall grid structure. The residual stress of the auxiliary support in the overall solid structure is relatively large, and it is easy to cause problems such as interlayer cracking or deformation of the overhanging...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art, and provide an auxiliary support structure suitable for inclined and suspended thin-walled structures, which is aimed at inclined and suspended thin-walled structures with a wall thickness of less than 3.5mm and an angle greater than 45° with the horizontal plane It adopts an integral support structure combined with solid support and grid support to provide sufficient strength and rigidity, which can not only suppress the defects such as warping deformation and interlayer misalignment of the forming layer in the inclined and suspended thin-walled structure, but also avoid the overall The grid support and the overall solid support cause a large amount of processing and the accuracy of the surface cannot be guaranteed.

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