Additive Manufacturing Toolpath Control for Overhangs
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Solution Overview
Problem
Large-scale additive manufacturing faces challenges in printing efficiency due to long printing times, high labor and energy costs, and difficulties in creating complex geometries and overhang structures without deformation or breakage, as conventional slicing software restricts toolpath creation and requires extensive support structures that are resource-intensive and difficult to remove.
Innovation Solution
The development of a system that allows for the creation of toolpaths with greater flexibility, enabling the printing of structures with single-bead widths and open-loop toolpaths, which reduces material usage and allows for the formation of complex geometries and overhangs without the need for extensive support structures, using a control system to manage bead width and overlap for improved printing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional slicing software is used to create toolpaths, then the printing process is straightforward, but the toolpath creation is restricted and requires extensive support structures
Solution Approach 1:
The patent changes the fundamental parameters of toolpath creation by allowing open-loop toolpaths instead of closed-loop, and enabling single-bead width printing instead of requiring multiple beads. This allows the system to create complex geometries and overhangs without conventional support structures, directly resolving the contradiction between toolpath flexibility and support structure complexity
Solution Approach 2:
The patent inverts the conventional approach by printing with single-bead width instead of multiple beads, and using open-loop toolpaths instead of closed-loop. This inversion enables the creation of structures that would normally require extensive support, thereby reducing support structure complexity while maintaining toolpath flexibility
2Manufacturing precision
If multiple toolpaths and multiple beads are used for complex shapes, then the shape can be printed, but printing time increases and labor cost and energy consumption increase
Solution Approach 1:
The patent segments the toolpath into single-bead open-loop paths instead of using multiple closed-loop toolpaths with multiple beads. This segmentation approach maintains the ability to print complex geometries while significantly reducing the total number of toolpath operations, thereby improving printing efficiency and reducing labor and energy costs
Solution Approach 2:
The patent implements continuous open-loop toolpaths that eliminate the need to stop and reverse at the end of each closed-loop perimeter. This continuity of motion maintains manufacturing precision for complex geometries while dramatically improving printing efficiency by eliminating repetitive toolpath operations
3Loss of substance
If single-bead width and open-loop toolpaths are used, then material usage is reduced and printing efficiency is improved, but the control system must manage bead width and overlap with greater precision
Solution Approach 1:
The patent implements a control system that uses feedback to monitor and adjust bead width and overlap in real-time during printing. This feedback mechanism ensures that single-bead open-loop toolpaths maintain the required precision for complex geometries while minimizing material waste through optimized material deposition
Data Source
AI summary
An additively manufactured structure and methods for making and using same. In a method for making the structure, the structure can be printed using a single bead, according to a single toolpath, according to an open toolpath, or a combination thereof. Advantageously, printing efficiency can be improved. Geometry, size and/or shape of the structure can be selected with more flexibility. An exemplary method can form an overhang without using an infill or a support structure. Furthermore, the overhang can be formed accurately in an easy manner without a need of accurate positioning of the infill or the support structure. The printing process can be simplified. An alternative exemplary method can form a wall section that terminates by connecting to another wall section. Advantageously, the wall sections can be strong because of the mutual support and appearance of the terminated wall section can be improved.