Sterling Silver Chain Alloy for Thicker Laser-Welded Links
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Solution Overview
Problem
The traditional sterling silver alloy is challenging to laser weld due to its high reflectivity and thermal conductivity, limiting the weldable thickness to about 0.015 inches, which restricts the manufacturing of sterling silver chains on chain machines.
Innovation Solution
A new sterling silver alloy with a minimum of 92.5% by weight silver and 7.5% by weight tin, replacing copper with tin, has been developed to enhance laser weldability, allowing successful welding of wires up to 0.050 inches in diameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If traditional sterling silver alloy is used for laser welding, then the welding process can be performed, but the weldable thickness is limited to about 0.015 inches due to high reflectivity and thermal conductivity
Solution Approach 1:
The patent changes the chemical composition parameters of the sterling silver alloy by replacing copper with tin. This compositional parameter change modifies the physical properties (reflectivity and thermal conductivity) to enable laser welding of thicker materials. The new alloy composition (at least 92.5% silver and at least 6.5% tin) fundamentally alters how the material interacts with laser energy, allowing weldable thickness to increase from 0.015 inches to 0.050 inches or greater.
2Adaptability or versatility
If traditional sterling silver alloy is used, then the alloy can be brazed successfully, but laser welding capability is severely restricted
Solution Approach 1:
The patent modifies the alloy composition parameters to create a material that is optimized for laser welding while maintaining compatibility with other joining methods. The specific composition (at least 92.5% silver and at least 6.5% tin) creates an alloy that responds well to laser energy absorption, enabling manufacturers to use laser welding for joining chain links and other sterling silver components, thereby expanding manufacturing versatility.
3Reliability
If copper is used in traditional sterling silver alloy, then the alloy has good traditional properties, but laser weldability is poor
Solution Approach 1:
The patent changes the compositional parameters by substituting tin for copper in the sterling silver alloy. This parameter change fundamentally alters the energy absorption characteristics of the material. Tin has different optical and thermal properties compared to copper, resulting in improved laser energy absorption and better laser weldability, while the alloy maintains its traditional sterling silver properties.
Solution Approach 2:
The patent creates a new composite alloy system by combining silver with tin in specific proportions (at least 92.5% silver and at least 6.5% tin). This composite material approach allows the alloy to exhibit both traditional sterling silver properties and improved laser welding characteristics, effectively combining the benefits of different material compositions.
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 new silver-tin alloy significantly expands the manufacturing capability for laser welding of sterling silver chains, enabling the production of chains with larger wire diameters and improving the efficiency and quality of the welding process.
Implementation Method 1
joining the links by laser welding the abutting ends
Implementation Method 2
laser welding the abutting ends to form a sterling silver chain
Data Source
AI summary
A sterling silver chain and method of manufacturing a sterling silver chain comprising a plurality of chain links. Each of the chain links can comprise a sterling silver wire, the sterling silver wire comprising a first end and a second end. Each of the first end and the second end of each of the plurality of chain links can be joined together through a weld. Each of the plurality of chain links can comprise at least 92.5% by weight silver and at least 6.5% by weight tin.