Ceramic Threaded Support Guide for Nichrome Wire Stability
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Solution Overview
Problem
Current failure testing procedures using Nichrome wires are inefficient due to the wires' tendency to move, bend, or break when heated, leading to failed tests and increased setup and testing time, as they are not properly supported during thermal and physical stress testing.
Innovation Solution
A heat-resistant, non-conductive threaded support guide made of ceramic, such as YZ zirconia, is used to securely hold the Nichrome wire in a coiled form, preventing movement and breakage during testing by providing a threaded surface with specific dimensions to support the wire effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the Nichrome wire is left hanging in open air or sitting on a surface free to move during testing, then the test setup is simple, but the wire moves, bends, and breaks due to thermal and physical stress, causing test failure
Solution Approach 1:
A ceramic support guide is introduced as an intermediary component between the Nichrome wire and the test environment. The support guide provides a stable mounting structure that holds the wire in place during thermal and physical stress testing, preventing movement and breakage while maintaining test simplicity
Solution Approach 2:
The Nichrome wire is pre-coiled around the ceramic support guide before testing begins. This preliminary coiling action secures the wire in a stable configuration that prevents movement during testing, eliminating the need for complex support structures while ensuring wire stability
2Reliability
If the Nichrome wire is pre-coiled around a metal screw, then the wire is supported, but the metal screw must be removed before activating the wire to prevent shorting, increasing setup time
Solution Approach 1:
The invention replaces the reusable metal screw with a purpose-designed ceramic support guide that integrates the coiling and support functions. The support guide is specifically shaped with threaded surfaces to hold the wire, eliminating the need for separate metal fasteners that would need to be removed before testing
Solution Approach 2:
The ceramic support guide serves multiple functions simultaneously: it provides structural support for the Nichrome wire, maintains the coiled configuration, and acts as an electrical insulator. This multi-functionality eliminates the need for separate metal fasteners and their removal, reducing setup time while maintaining wire stability
3Temperature
If the Nichrome wire is heated to high temperatures (1200°F to 1500°F), then thermal stress testing is effective, but the wire moves and breaks due to thermal expansion and stress
Solution Approach 1:
The ceramic support guide acts as a thermal intermediary that can withstand high temperatures (1200°F to 1500°F) while providing mechanical support. The ceramic material maintains its structural integrity at these temperatures, preventing wire movement and breakage during thermal stress testing
Solution Approach 2:
The invention changes the material parameter of the support structure from metal to ceramic. This parameter change allows the support to withstand high temperatures without expanding or deforming, thereby maintaining wire stability during thermal stress testing while the wire itself is heated to the required temperatures
4Measurement precision
If the test procedure is scrapped due to wire damage, then complete inspection is required, but hours of additional setup time are lost
Solution Approach 1:
The ceramic support guide provides beforehand cushioning and protection for the Nichrome wire by securing it in a stable configuration before thermal and physical stress are applied. This preventive support prevents wire damage during testing, eliminating the need for test scrapping and resetup while maintaining accurate test result determination
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 support guide reduces setup time, prevents Nichrome wire damage, and ensures reliable failure testing by maintaining the wire's stability under high temperatures, allowing for accurate determination of test results without the need for pre-coiling and post-test inspection.
Implementation Method 1
the low resistance Nichrome wire is heated. The goal is to observe any failure in the DUT.
Implementation Method 2
a heat resistant, non-conductive threaded support guide made of ceramic, such as YZ zirconia, is used to securely hold the Nichrome wire
Data Source
AI summary
A support guide is provided for supporting a delicate heating wire in a failure test. The support guide includes a body formed of a heat resistant, non-conductive material. The body has a threaded surface configured to receive and support the delicate heating wire in a coiled form. Also provided is a failure testing method using the heat resistant, non-conductive threaded support guide.