Additive Manufacturing Head with Integrated Laser Surface Smoothing
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Solution Overview
Problem
Additive manufacturing produces parts with rough surface finishes, which limit their applications due to stress risers and interfere with non-destructive inspection methods, and current post-processing techniques are cumbersome, expensive, and ineffective for complex parts, especially for interior surfaces.
Innovation Solution
An integrated additive-manufacturing system that includes an additive-manufacturing head coupled with a surface-processing device, capable of processing both exterior and interior surfaces, using a laser-emitting device to smooth surfaces in-situ as layers are formed, ensuring efficient and cost-effective surface finishing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate post-processing steps are used to improve surface finish, then surface roughness is reduced, but manufacturing complexity and cost increase
Solution Approach 1:
The patent combines the additive-manufacturing head and surface-processing device into a single integrated system. The surface-processing device is coupled directly to the additive-manufacturing head, allowing both manufacturing and surface finishing operations to be performed in one unified apparatus rather than requiring separate post-processing steps.
Solution Approach 2:
The surface processing is performed in-situ immediately after each layer is formed during the additive manufacturing process. This preliminary action eliminates the need for subsequent post-processing operations by addressing surface roughness at the moment of creation rather than after the entire part is manufactured.
2Manufacturing precision
If conventional post-processing equipment is used, then surface finish improves, but processing time increases
Solution Approach 1:
The integrated system enables continuous operation where the surface-processing device operates concurrently with the additive-manufacturing head. As layers are being deposited, the surface-processing device simultaneously smooths the freshly formed layers, eliminating idle time between manufacturing and finishing operations.
Solution Approach 2:
Surface finishing is performed immediately after layer formation during the manufacturing process itself, rather than waiting until after complete part fabrication. This preliminary action reduces total processing time by overlapping finishing operations with manufacturing operations.
3Manufacturing precision
If conventional post-processing methods are used, then exterior surfaces are improved, but interior surfaces remain inaccessible
Solution Approach 1:
The surface-processing device is designed with segmented or modular components that can be positioned and oriented to access different surfaces of the part. The device can be configured to reach interior surfaces through openings or cavities in the part geometry, allowing independent processing of exterior and interior surfaces.
Solution Approach 2:
The surface-processing device incorporates movable and adjustable components that can dynamically reposition to access both exterior and interior surfaces. The device can extend, retract, rotate, or adjust its orientation to reach previously inaccessible interior regions of complex parts.
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 system effectively reduces surface roughness, enhances the applicability of parts in cyclical-loading environments, and facilitates accurate non-destructive inspections by providing a seamless and efficient surface processing method for complex parts.
Implementation Method 1
a laser-emitting device to smooth surfaces in-situ as layers are formed
Implementation Method 2
spraying or otherwise injecting a powder or a liquid into a focused beam of a high-power laser under controlled atmospheric conditions, thereby creating a weld pool
Data Source
AI summary
In one aspect, A method of forming a product using an additive-manufacturing head includes forming a new layer of material of the product with the additive-manufacturing head. Forming the new layer of material includes depositing the new layer of material on an existing layer of material and melting the new layer of material so that the new layer of material is welded to the existing layer of material. The method also includes processing at least one of the new layer of material or the existing layer of material with a laser-emitting device, coupled to the additive-manufacturing head. Processing the at least one of the new layer of material or the existing layer of material with the laser-emitting device comprises smoothing a lateral surface of at least one of the new layer of material or the existing layer of material with a laser beam, emitted from the laser-emitting device.