Metal Additive Manufacturing Support Removal by Thermal Pulse
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The removal of support structures from additive manufactured metallic components, particularly high-strength metals like superalloys, is challenging due to their strong interface with the component, which can lead to damage during removal and geometric distortion.
Innovation Solution
Exposing the component and support structure to a thermal pulse to weaken or break the interface between them, allowing for easier mechanical removal, and optionally applying additional thermal pulses for surface finishing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If support structures are designed with strong interface to component, then support strength is improved, but support removal difficulty increases
Solution Approach 1:
A heat treatment process is applied before support removal to selectively reduce the strength of the interface between supports and component. This preliminary thermal action weakens the bond at the interface region, allowing easy support removal while preserving the strong interface during the additive manufacturing process itself
2Ease of manufacture
If support structures are designed with lattice or toothed profile, then support removal ease is improved, but interface strength decreases
Solution Approach 1:
Heat treatment is applied as a preliminary step before mechanical support removal. This thermal process selectively weakens the interface strength, enabling the use of simple support profiles without compromising either interface strength during manufacturing or ease of removal afterward
Solution Approach 2:
The heat treatment process changes the physical parameters of the interface region, reducing its strength through thermal effects. This parameter change allows the interface to be strong during manufacturing but easy to separate during removal, resolving the contradiction between these two requirements
3Ease of manufacture
If sharp cutting tools with considerable force are used for support removal, then support removal effectiveness is improved, but component surface damage increases
Solution Approach 1:
Heat treatment is applied before mechanical support removal to pre-weakens the interface. This preliminary action reduces the force required for support removal, enabling the use of less aggressive cutting tools that preserve component surface quality while maintaining removal effectiveness
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
The thermal pulse method effectively reduces the strength of the interface without affecting the material properties of the component, facilitating easier support removal and improving fatigue properties, while subsequent thermal pulses can enhance surface finish by reducing roughness.
Implementation Method 1
exposing the component and support structure to at least one thermal pulse so as to weaken or break the interface(s) between the support structure and component
Data Source
AI summary
A method of additive manufacturing metallic components, the method includes: forming a component in a layer by layer process, the component being formed integrally with at least one non-perforated support structure to be separated from the component after the layer by layer process, the support structure being formed with at least one wall that is non-perforated; and wherein after completion of the layer by layer process, the method includes exposing the component and support structure to at least one thermal pulse so as to weaken, or break, the interface(s) between the support structure and component prior to removal of the support.