Shape-Memory Support Structures for Clean 3D Print Detachment
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Solution Overview
Problem
The manual and complex processes for removing support structures from 3D printed parts, such as through cutting or machining, are inefficient and costly, particularly in technologies like LPBF and SLM.
Innovation Solution
The use of shape-memory materials and 3D printed enclosures that allow support structures to autonomously detach after the manufacturing process by expanding and breaking from the part surface, facilitated by a computing system that designs and inserts shape-memory elements into the support structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual or machining methods are used to remove support structures, then support structures can be detached, but the process is time-consuming and costly
Solution Approach 1:
The support structure is designed with a predetermined weak point during the manufacturing process. This weak point is prepared in advance as part of the support structure itself, allowing it to break automatically during detachment without requiring external machining or manual intervention. The weak point is positioned to fracture at a specific location that enables clean separation from the part surface.
Solution Approach 2:
The support structure is designed to detach automatically using its own inherent properties. The shape-memory element changes phase in response to temperature changes during cooling, generating mechanical force that causes the support structure to break at the predetermined weak point and detach autonomously from the part surface without requiring external tools or manual operations.
2Ease of manufacture
If complex machining processes are used to remove support structures, then support structures can be detached, but the complexity and cost increase
Solution Approach 1:
The support structure is designed with a predetermined weak point during the manufacturing process. This weak point is prepared in advance as part of the support structure itself, allowing it to break automatically during detachment without requiring external machining or manual intervention. The weak point is positioned to fracture at a specific location that enables clean separation from the part surface.
Solution Approach 2:
The patent replaces complex mechanical machining systems with a thermal-mechanical mechanism. The shape-memory element utilizes temperature-induced phase change to generate mechanical force that automatically breaks the support structure at the predetermined weak point, eliminating the need for external machining tools, clamps, or manual mechanical operations.
3Manufacturing precision
If traditional support structure removal methods are used, then support structures can be detached, but residue is left on the part surface
Solution Approach 1:
The support structure is designed with a predetermined weak point during the manufacturing process. This weak point is prepared in advance as part of the support structure itself, allowing it to break automatically during detachment without requiring external machining or manual intervention. The weak point is positioned to fracture at a specific location that enables clean separation from the part surface.
Solution Approach 2:
The shape-memory element undergoes a phase transition in response to temperature changes during the cooling process. This phase change causes the support structure to expand and generate mechanical force that breaks at the predetermined weak point, enabling clean detachment without leaving residue on the part surface.
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 method reduces the cost, time, and complexity of support structure removal by enabling automatic detachment without operator intervention, leveraging natural cooling processes and minimizing residue left on the part.
Implementation Method 1
The support structure includes a shape-memory element configured to change shape upon cooling
Implementation Method 2
The support structure includes a shape-memory element configured to change shape upon cooling
Data Source
AI summary
A computing system may include a design access engine configured to access a digital design of a part designed for construction through an additive manufacturing process. The computing system may also include a detachable support structure engine configured to insert, into the digital design, a support structure configured to support construction of a surface of the part. The inserted support structure may include a shape-memory element configured to be in a diminished shape during the additive manufacturing process and expand into an expanded shape after the additive manufacturing process ends as well as an element enclosure attached to the surface of the part and configured to hold the shape-memory element in the diminished shape and break from the part as the shape-memory element expands into the expanded shape.