Cantilevered Mask Structure for Additive Part Openings During Coating
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Solution Overview
Problem
Existing methods for protecting openings in additively manufactured parts during post-manufacturing processing, such as coating and peening, are either time-consuming and complex due to the use of removable materials or compromise part performance with permanent shielding features.
Innovation Solution
A mask with an attachment ligament configured to couple to the part in a cantilever fashion, featuring cover members that extend over the openings with strategically sized spacings to prevent coating and peening material entry, and a detachment member for easy removal, all made from integral material layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If removable blocking material is used to protect openings during coating application, then the openings are protected from coating entry, but manufacturing time increases and the coating may crack during removal
Solution Approach 1:
The mask is segmented into a support structure with multiple spacing elements that can be independently positioned between the coating applicator and the openings. This segmentation allows the mask to be removed as a single unit without requiring individual removal from each opening, significantly reducing manufacturing time while maintaining protection during the coating process.
Solution Approach 2:
The mask serves as an intermediary protective element that temporarily occupies the space between the coating applicator and the openings. It mediates the coating process by allowing the applicator to pass over the openings without direct contact, preventing coating entry while enabling continuous coating application across the entire surface.
2Reliability
If removable blocking material is used to protect openings, then openings are protected during coating, but the process complexity increases due to installation and removal steps
Solution Approach 1:
The mask combines multiple protective functions into a single integrated structure. The support structure and spacing elements are merged into one component that simultaneously provides mechanical support, maintains spacing from the openings, and prevents coating entry. This merging reduces the number of separate steps required compared to installing and removing individual plugs or caps at each opening.
Solution Approach 2:
The mask is designed as a universal protective device that can be applied to surfaces with multiple openings of various sizes and configurations. The spacing elements can be adjusted or configured to match different opening patterns, making the same basic mask design applicable to multiple different part geometries without requiring custom solutions for each case.
3Reliability
If permanent shielding features are added to protect openings, then openings are protected during processing, but part performance is compromised
Solution Approach 1:
The mask is designed as a temporary, disposable protective element that is removed after the coating process is complete. Rather than permanently modifying the part with shielding features, the mask provides the necessary protection during manufacturing and is then discarded, leaving the part's original performance characteristics intact.
Solution Approach 2:
The protective function is extracted from the final part design and implemented as a separate, removable mask. This extraction allows the protection to be applied only during the manufacturing process without becoming a permanent part of the component, thereby avoiding any compromise to the part's intended performance and geometry.
Data Source
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AI summary
A mask (100) is provided for an additively manufactured part (102) including a plurality of openings (106, 204) in a surface (110) of the part (102). The mask (100) is made with the part (102) and includes an attachment ligament (120, 220) configured to integrally couple to the part (102) adjacent the plurality of openings (106, 204). A cover member (130, 140, 230) include a proximal end (132, 142, 232) integrally coupled to the attachment ligament (120, 220) and distal end (134, 144, 234) extending at least partially over the plurality of openings (106, 204). A detachment member (152, 252, 352) may optionally extend from adjacent the cover member (130, 140, 230). The attachment ligament (120, 220) is the sole connection to the part (102). The mask (100) may have an L-shape in cross-section.