Cantilevered Opening Mask for Additive Part Coating Protection
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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 spacings to prevent coating and peening material entry, and a detachment member for easy removal, ensuring the mask is the sole connection to the part.
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 and complexity increase due to installation and removal requirements
Solution Approach 1:
The mask is divided into a support structure with multiple detachable cover members, each capable of independently covering individual openings. This segmentation allows selective protection of openings during coating operations and enables quick removal of only the necessary covers without affecting other areas.
Solution Approach 2:
The mask employs disposable or easily replaceable cover members that can be discarded after a single use or recovered and reused multiple times. This approach eliminates the time-consuming process of carefully removing and reusing complex blocking materials, as the covers are designed for efficient single-use or straightforward reuse.
2Reliability
If removable blocking material is used to protect openings during coating application, then the openings are protected from coating entry, but device complexity increases due to multiple components required
Solution Approach 1:
Multiple cover members are integrated into a single unified mask structure with a common support framework. This merging approach simplifies the overall system by combining what would otherwise be separate blocking components into one assembly that can be installed and removed as a single unit, reducing the number of discrete parts and assembly steps.
Solution Approach 2:
The mask structure is designed with universal features that allow it to accommodate various opening sizes and configurations. The cover members can be selectively positioned to protect different openings as needed, making the same mask structure adaptable to multiple protection scenarios without requiring custom-designed components for each specific application.
3Reliability
If coating is applied over removable blocking material, then the blocking material protects openings, but coating removal causes extensive cracking that may render the part unusable
Solution Approach 1:
The cover members are designed to be completely removed from the part surface before coating application, rather than applying coating over the blocking material. This extraction approach eliminates the problem of coating adhesion to the blocking material, which would cause cracking during removal. The openings remain protected during coating by the physical presence of covers, but the coating itself is never applied over the blocking surfaces.
Solution Approach 2:
The mask is installed on the part before coating application begins, establishing protection in advance. The cover members are positioned to precisely cover the openings that need protection, and the coating is then applied only to the exposed surfaces. This preliminary positioning ensures that no coating contacts the blocking material, eliminating the risk of subsequent cracking during removal.
4Reliability
If permanent shielding features are used to protect openings, then the openings are protected during processing, but part performance is sacrificed to accommodate the shielding
Solution Approach 1:
The mask employs dynamic, removable cover members that can be installed and removed as needed, rather than permanent fixed shielding features. This dynamic approach allows the protection system to be present during coating and peening operations when needed, and completely absent during operational phases where the openings must remain accessible for their intended functions such as cooling or drainage.
Solution Approach 2:
The mask is installed on the part before processing operations begin, providing protection only when required. During the coating and peening processes, the cover members are in place to protect openings from material entry. After processing is complete, the mask is removed entirely, restoring full functionality of the openings without any permanent modifications or performance compromises to the part.
Data Source
AI summary
A mask is provided for an additively manufactured part including a plurality of openings in a surface of the part. The mask is made with the part and includes an attachment ligament configured to integrally couple to the part adjacent the plurality of openings. A cover member include a proximal end integrally coupled to the attachment ligament and distal end extending at least partially over the plurality of openings. A detachment member may optionally extend from adjacent the cover member. The attachment ligament is the sole connection to the part. The mask may have an L-shape in cross-section.