Topological optimization design method of self-supporting structure for additive manufacturing

Abstract

The invention discloses a topological optimization design method of a self-supporting structure for additive manufacturing, and belongs to the related technical field of structure optimization design.The method comprises steps of calculating and constraining a suspension angle alpha through a four-unit method; and obtaining the suspension structure of the self-supporting structure in additive manufacturing by combining suspension angle constraint and SIMP method. The suspension structure needing to be supported can be effectively restrained, adding of the supporting structure is avoided, theusing amount and cost of consumables are effectively reduced, and the surface quality of a workpiece is improved; in addition, the calculation method is completely suitable for a continuum structure,high in flexibility, wide in application range, extremely easy to be implanted into a topological optimization framework as an extension module, and simple and feasible.

Description

technical field [0001] The invention relates to a topology optimization design method for a self-supporting structure used for additive manufacturing, and belongs to the related technical field of structure optimization design. Background technique [0002] Topology optimization is an effective means to realize the lightweight design of the workpiece structure, but because the optimized workpiece is often complex in structure, most topology optimization is only used for the conceptual design of the structure, and the post-processing stage is difficult due to the limitations of traditional processing technology. In recent years, with the rise and development of additive manufacturing technology, scholars and industrial designers at home and abroad generally believe that additive manufacturing technology has significant advantages such as strong ability to process complex components, short processing cycle, and no need for tooling and molds, making processing no longer necessar...

AI Technical Summary

Problems solved by technology

However, there are still manufacturing constraints in the additive manufacturing process, among which the overhang structural constraints are the most serious

In additive manufacturing, the model is sliced ​​by software and printed layer by layer. In order to avoid printing collapse, it is required that there is enough material under each part of each layer after the model is sliced. If there is insufficient support material under the layer, it will form For overhanging structures, auxiliary supports must be artificially added to ensure successful printing. These supports are formed during processing and removed during post-processing, resulting in a serious waste of raw materials and time costs, and even damage the surface of the workpiece during removal.

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