3D Printing Overhangs Without Auxiliary Supports
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Solution Overview
Problem
Traditional 3D printing methods often require auxiliary supports for overhangs, which increase manufacturing costs and time, and can hinder the formation of complex geometries like cavities and ledges, constraining design possibilities.
Innovation Solution
The use of controllers to direct energy beams to form and reshape overhang segments with controlled energy beams, allowing for the creation of complex 3D objects with high dimensional accuracy and low surface roughness by transforming materials and redistributing mass without auxiliary supports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If auxiliary supports are inserted to prevent deformation during 3D printing, then manufacturing reliability is improved, but manufacturing time and cost increase
Solution Approach 1:
The patent extracts and eliminates the auxiliary supports from the manufacturing process by using controlled energy beams to directly form overhangs and complex geometries during printing, removing the need for separate support structures and their subsequent removal operations
Solution Approach 2:
The patent replaces the mechanical support system with an energy beam-based system that uses controlled energy application to melt and redistribute material, forming overhangs through thermal energy rather than mechanical support structures
2Reliability
If auxiliary supports are used to enable overhang formation, then manufacturing reliability is improved, but design flexibility deteriorates
Solution Approach 1:
The patent removes the constraint of auxiliary supports from the design process, enabling direct formation of complex geometries including cavities and ledges without support structure interference
Solution Approach 2:
The patent changes the physical state and distribution of material through controlled energy beam application, transforming material properties to enable formation of complex geometries that would traditionally require support structures
3Ease of manufacture
If traditional 3D printing methods are used for overhangs, then manufacturing simplicity is maintained, but manufacturing precision deteriorates
Solution Approach 1:
The patent replaces traditional mechanical layer-by-layer deposition with controlled energy beam application that directly forms overhangs with precise dimensional control through thermal energy management
Solution Approach 2:
The patent controls material transformation through energy beam parameters (intensity, duration, distribution) to achieve precise dimensional accuracy in overhang formation while maintaining manufacturing simplicity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables the generation of high-quality complex 3D objects with reduced surface roughness and porosity, allowing for the creation of overhangs at angles up to 45 degrees without the need for auxiliary supports, thus reducing manufacturing costs and enhancing design flexibility.
Implementation Method 1
direct a first energy source to generate a first energy beam to form an overhang segment on an edge of a hard material, which overhang segment laterally extends outward from the edge
Implementation Method 2
direct a second energy source to generate a second energy beam to increase the radius of curvature of the convex portion of the overhang segment by transforming at least part of the overhang segment to a transformed material
Data Source
AI summary
The present disclosure provides three-dimensional (3D) printing methods, apparatuses, systems and/or software to form one or more 3D objects, some of which may be complex. In some embodiments, the one or more 3D objects comprise an overhang portion, such as a ledge or ceiling of a cavity. The methodologies may be used to form overhang portions with diminished deformation, defects and/or auxiliary support structures.