Supporting structure for relieving stress deformation of metal part manufactured through SLM

Abstract

The invention provides a supporting structure for relieving the stress deformation of a metal part manufactured through SLM. The supporting structure comprises latticed supporting units, conical supporting units and volume supporting units. A base plate is arranged below the narrow and long suspension face of a part needing to be supported. The latticed supporting units are arranged between the bottom face of the narrow and long suspension face and the base plate. The volume supporting units are arranged at the positions, with the feature residual stress larger than a set threshold value, of the part. According to the supporting structure for relieving the stress deformation of the metal part manufactured through SLM, the three supporting structures of the latticed supporting units, the conical supporting units and the volume supporting units are adopted at the same time to relieve the deformation caused by self-stress of the part in the SLM 3D printing process, so that formation of the part is ensured, and the printing precision of the part is improved.

Description

technical field [0001] The invention belongs to the technical field of supporting metal parts, and in particular relates to a supporting structure for reducing stress and deformation of metal parts manufactured by SLM. Background technique [0002] 3D printing (3DP) is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. Because it is printed layer by layer, it has more obvious advantages compared with traditional manufacturing when manufacturing parts with complex shapes. Specifically, compared with the traditional manufacturing industry, 3D printing technology does not require CNC milling and special tools, and directly prints parts with complex structures based on digital models. 3D printing technology can also complete the manufacturing. Generally speaking, the manufacturing time and cost of parts printed by 3D printing tech...

AI Technical Summary

Problems solved by technology

SLS) technology manufacturing metal parts process is complicated

[0004] However, SLM technology also has its disadvantages. Due to its local high temperature and rapid cooling characteristics, residual stress is inevitably generated during processing, that is, the self-equilibrium that remains in the object after eliminating external forces or uneven temperature fields. The internal stress and residual stress will have a great influence on the formability of parts and the accuracy of forming dimensions

For parts with high stress, warping, cracks and other phenomena are prone to occur, thereby reducing the forming accuracy of the parts

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