Additive Manufacturing Surface Smoothing via Layer-Edge Melting
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Solution Overview
Problem
Additively manufactured products often have rough surfaces, requiring time-consuming post-processing, and can be impaired by stress peaks, especially in cavities, which can make further surface smoothing impossible, affecting the strength properties of the components.
Innovation Solution
The method involves cleaning the last deposited solid layer and reworking its edge by softening or melting it before the next layer is applied, using a high-energy beam, and incorporating a device for powder removal to smooth the surface efficiently, allowing for reduced post-processing and improved surface quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additive manufacturing is used to produce components layer by layer, then productivity and manufacturing flexibility are improved, but surface roughness increases and manufacturing precision deteriorates
Solution Approach 1:
The patent applies preliminary action by performing edge rework and smoothing operations on each deposited layer immediately after material bonding, before the next layer is applied. This continuous surface treatment during the manufacturing process prevents cumulative roughness buildup, eliminating the need for extensive post-processing while maintaining high productivity.
Solution Approach 2:
The invention implements continuity of useful action by integrating surface smoothing operations into the continuous manufacturing process. The edge rework is performed continuously on each layer as it is deposited, ensuring that surface quality improvement is an ongoing process throughout manufacturing rather than a separate post-processing step.
2Manufacturing precision
If post-processing is applied to smooth rough surfaces, then manufacturing precision is improved, but productivity decreases and loss of time increases
Solution Approach 1:
By performing surface smoothing operations during the manufacturing process on each layer immediately after deposition, the patent eliminates the need for separate post-processing steps. This preliminary surface treatment maintains high surface quality while preventing time loss that would occur with extensive post-processing.
Solution Approach 2:
The invention merges the material bonding process with surface smoothing operations by using the same high-energy beam for both functions. This combination allows edge rework to be performed during the manufacturing process itself, eliminating the need for separate post-processing operations and maintaining high productivity.
3Manufacturing precision
If high-energy beam is used for material bonding, then manufacturing precision is improved, but energy consumption increases
Solution Approach 1:
The patent combines material bonding and surface smoothing operations into a single high-energy beam process. By using the same beam for both functions, the system achieves precise material bonding while simultaneously performing edge rework, thereby reducing total energy consumption compared to using separate processes for each function.
Solution Approach 2:
The high-energy beam is designed to perform multiple functions: material melting/bonding and surface smoothing. This multi-functionality reduces the need for separate energy-consuming processes, thereby improving energy efficiency while maintaining high manufacturing precision for both bonding and surface quality.
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 significantly reduces surface roughness, minimizing the need for complex post-processing and enhancing the mechanical resistance and strength of the components by creating smoother surfaces with lower production effort.
Implementation Method 1
reworking its edge by softening or melting it before the next layer is applied, using a high-energy beam
Implementation Method 2
reworking its edge by softening or melting it before the next layer is applied, using a high-energy beam
Data Source
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AI summary
The present invention relates to a method or device for the additive manufacturing of components by applying powder material layer by layer to a substrate or a previously manufactured part of a component and at least partially bonding the powder material in the powder layer according to the component cut contour along the powder layer and with an underlying solid material of the component or substrate to form several superimposed solid layers (14), wherein after the bonding of the powder material the solid layer (14) just produced is cleaned of powder material and before the deposition of the next solid layer the edge (21, 22) of the solid layer is post-processed by softening the material composite.