Shape-Memory Ring Setting for Decorative Elements in Brittle Substrates
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Solution Overview
Problem
Conventional methods for setting decorative elements, such as gemstones, on non-deformable materials like ceramics or intermetallic alloys are limited, as they either require adhesive bonding which lacks durability or pre-mounted solutions that are not suitable for brittle materials and blind holes.
Innovation Solution
A setting system using a shape memory alloy ring that can reversibly transform to securely hold decorative elements within a hollow substrate, allowing for easy assembly and disassembly without damaging the support, utilizing a nickel-titanium alloy ring with a star geometry for enhanced deformation and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adhesive bonding is used to set decorative elements on non-deformable materials, then the setting can be applied to hard and brittle materials, but the retention durability is insufficient and adhesion cannot be guaranteed
Solution Approach 1:
The patent introduces an intermediate setting structure made of ductile metal that acts as a mediator between the non-deformable support and the decorative element. This setting includes a base portion that fits into a hollow in the support and setting elements that protrude to mechanically retain the decorative element, thereby providing reliable retention while maintaining compatibility with hard and brittle materials.
2Reliability
If conventional setting with prong folding is used, then mechanical retention is achieved, but the method is limited to ductile metals and cannot be applied to hard and brittle materials
Solution Approach 1:
The patent segments the setting into two distinct functional parts: a base portion that interfaces with the non-deformable support and setting elements that interface with the decorative element. This segmentation allows each part to be optimized for its specific function, enabling mechanical retention while expanding material compatibility.
3Adaptability or versatility
If hot forming processes are used to fill cavities with ductile material, then setting capability is achieved on non-deformable supports, but thermal stresses are induced and specific tools are required
Solution Approach 1:
The setting is pre-formed as a complete assembly with the base portion and setting elements already integrated. This preliminary action eliminates the need for complex hot forming processes and specific tools during installation, reducing process complexity while maintaining setting capability on non-deformable supports.
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
Enables secure and durable retention of decorative elements in hard and brittle materials, including blind holes, without requiring access from the back, ensuring long-term stability and ease of use.
Implementation Method 1
a circular slot arranged to receive a ring-like element made of a shape memory alloy which can undergo a reversible transformation
Data Source
AI summary
A setting or mounting includes a ring carrying elements for setting a decorative element, this setting or mounting being arranged to be placed radially inside a hollow provided in a substrate of an item to be decorated. The setting includes a circular slot arranged to receive a ring-like element made of a shape memory alloy which can undergo a reversible transformation. The ring-like element is able to move from a retracted position in which it rests in the slot, to an open position in which the ring-like element at least partially protrudes from the slot to hold the setting in the substrate.