Laser Welded Optical Sealing Component with Convex Reinforcement
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Solution Overview
Problem
The existing ROADM package may not secure sufficient hermeticity and strength in the bond between the side wall and the lid, leading to potential gas leakage and fluctuations in the optical path due to changes in the vapor composition and refractive index within the housing.
Innovation Solution
A sealing component with a metallic housing and lid, where the lid is bonded to the side wall with a melted portion that extends convexly outward from the top face to the corner, ensuring a strong and hermetic seal, achieved through laser welding that forms a loop along the peripheral edge and reaches outside the welded portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the side wall and lid are bonded by conventional welding methods, then the housing can be assembled, but the bond part cannot secure sufficient hermeticity and strength
Solution Approach 1:
The melted portion is formed with a convexly-curved outward form from the top face of the lid to the corner, creating a curved reinforcement structure that enhances both hermeticity and bond strength at the critical corner region where the upper edge and outer surface intersect
Solution Approach 2:
The melted portion is specifically formed to reach the corner at which the upper edge and outer surface intersect, providing localized reinforcement at the most critical sealing point rather than uniform bonding throughout the entire perimeter
2Reliability
If the housing is firmly welded to secure high hermetical sealing quality, then gas leakage is prevented, but the manufacturing complexity and cost increase
Solution Approach 1:
The laser welding process targets specifically the peripheral edge region where the melted portion reaches the corner, concentrating the welding effort at the most critical sealing point rather than welding the entire housing structure, thereby reducing manufacturing complexity while maintaining high hermeticity
Solution Approach 2:
Conventional mechanical welding methods are replaced with laser welding technology, which provides more precise control over the melted portion formation and enables the creation of the convexly-curved reinforcement structure with higher efficiency and reduced complexity
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 solution provides a highly hermetic and strong bonding between the housing components, maintaining the optical device in a sealed state with minimal gas leakage, even under environmental changes, and allows for weight reduction and cost-effectiveness.
Implementation Method 1
the lid is bonded to the side wall such that the melted portion have a convexly-curved outward form from the top face of the lid to the corner
Data Source
AI summary
The sealing component 1 of the invention is provided with a metallic housing 19 that comprises a base part 19a, a side wall 19b connected to the base part 19a and an opening portion 19c facing to the base part 19a, and a metallic lid 20 to cover the opening portion 19c, wherein a melted portion 24 is formed around the boundary between the lid 20 and the upper edge 19b1, the melted portion 24 is formed to reach the corner 19b3 of the side wall 19b, and the melted portion 24 has a convexly-curved outward form 24a from the top face of the lid 20 to the corner 19b3 in the longitudinal cross-sectional view of the sealing component 1.