Additive Support Structures with Notches and Trusses
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Solution Overview
Problem
Current additive fabrication techniques face challenges in generating optimal support structures that are easy to remove without compromising the stability of the printed object, often resulting in material waste, increased printing time, and uneven stress distribution.
Innovation Solution
The method involves generating support structures with strategically placed weaker regions, such as notches, and using a graphical user interface-based brush tool for efficient support placement, allowing users to customize the density and distribution of support tips, and employing topology optimization to minimize material usage while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional support structures are generated without weaker regions, then structural stability during printing is improved, but ease of removal after printing deteriorates
Solution Approach 1:
The support structure incorporates weaker regions at specific locations where controlled breaking is needed for removal, while maintaining full strength in other areas during printing. This local differentiation allows the structure to be stable during fabrication but easily removable afterward, resolving the contradiction between stability and ease of removal.
2Stability of the object's composition
If more support structures are generated to ensure stability, then structural integrity is improved, but material waste increases
Solution Approach 1:
The system optimizes support structure parameters including density, distribution, and material properties to achieve the minimum necessary structural integrity. By carefully tuning these parameters, the solution provides adequate support while minimizing material usage, thus reducing waste without compromising stability.
3Stability of the object's composition
If traditional support generation methods are used, then structural coverage is improved, but printing time increases
Solution Approach 1:
Instead of uniformly distributing support structures throughout the entire model, the system identifies and places supports only at specific critical locations where structural coverage is needed. This localized approach maintains adequate support coverage while significantly reducing the overall amount of support material and printing time required.
4Stability of the object's composition
If support structures are placed densely to ensure stability, then structural support is improved, but ease of operation for removal deteriorates
Solution Approach 1:
The support structure is segmented into multiple disconnected components or modular sections that can be independently removed. This segmentation allows for easier operation during removal while maintaining dense structural support during printing, as each segment can be detached without requiring complete disassembly of the entire support structure.
Data Source
AI summary
Methods and systems for generating a support structure for a three-dimensional object in additive fabrication. The method involves utilizing a processor to generate the support structure, which includes a plurality of support pillars with notches, a plurality of contact structures that connect the support pillars to the object, and a plurality of trusses. The trusses are connected to different support pillars at opposite ends, forming a cohesive structure.