Machined Glass Sheet Edge Profile for Full Seal Coverage
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Solution Overview
Problem
Conventional glass sheet machining results in exposed edge parts when engaging with finishing joints and seals, leading to visual defects, foreign body damage, and reduced impact resistance.
Innovation Solution
A glass sheet design with a convex curved part connected to each main face and a flat part interconnecting them, allowing a joint or seal to fully cover the edge face, reducing the machining height and eliminating exposed parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the edge face is machined with a fully rounded profile using a conventional grinding wheel, then handling ease and glue application are improved, but exposed edge parts remain when engaging with finishing joints and seals, leading to visual defects and reduced impact resistance
Solution Approach 1:
The edge face profile is segmented into three distinct parts: a first convex curved part connected to the first main face, a second convex curved part connected to the second main face, and a flat part interconnecting the two curved parts. This segmentation allows the joint or seal to fully cover the edge face while maintaining rounded portions for handling ease, thereby resolving the contradiction between ease of operation and reliability.
Solution Approach 2:
Different portions of the edge face are given different geometric qualities: the first and second convex curved parts provide rounded surfaces for easy handling and glue application, while the flat part provides a surface that allows complete coverage by the joint or seal. This local differentiation of geometric properties resolves the contradiction between handling ease and impact resistance.
2Ease of manufacture
If the edge face is machined with a fully rounded profile, then glue application is improved, but visual defects occur due to exposed edge parts
Solution Approach 1:
The edge face is divided into segmented zones with specific geometric characteristics: rounded convex parts for glue application and a flat part for complete joint coverage. This segmentation enables both good glue application and acceptable visual appearance without compromise.
Solution Approach 2:
The edge face exhibits local quality variation where the convex curved parts have rounded geometry suitable for glue application, while the flat part has a geometry that ensures complete coverage by the joint or seal, eliminating visual defects. This local geometric differentiation resolves the contradiction between ease of manufacture and visual appearance.
3Reliability
If the machining height is reduced to allow joint coverage, then exposed parts are eliminated, but the rounded profile characteristics are compromised
Solution Approach 1:
The edge face profile is segmented to include both rounded convex parts that maintain handling characteristics and a flat part that enables complete joint coverage. This segmentation allows the machining height to be optimized for joint coverage while preserving rounded profile characteristics in specific zones, resolving the contradiction between reliability and shape.
Solution Approach 2:
Different portions of the edge face have different geometric qualities: the convex curved parts maintain rounded profiles for handling, while the flat part provides the necessary geometry for complete joint coverage. This local differentiation of geometric properties resolves the contradiction between joint coverage and rounded profile characteristics.
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 improved visual appearance and enhanced impact resistance by ensuring the joint or seal completely covers the edge face, minimizing exposure and enhancing structural integrity.
Implementation Method 1
The abrasive nature of the groove surface is achieved by diamond particles bonded to said surface. In practice, a glass sheet is machined by inserting it by the edge face into the groove while the grinding wheel is rotating.
Data Source
AI summary
A glazed assembly includes a monolithic or laminated glazing and a finishing joint and/or seal, the glass sheet of the monolithic glazing, or, respectively, an outer sheet of the laminated glazing, these being referred to as “considered glass sheet”, including an outer first face and a second face separated by an edge face including a first curved part connected to the first face, a second curved part connected to the second face, and a flat part connecting the first and second curved parts together, the intersection between the flat part and a curved part being made up, in a cross-section, of a single point, the seal or joint including a contact part opposite the edge face and including a flat face in contact with the flat part, and a first protuberance in the continuation of the flat face and covering the entire curved part connected to the outer face.