Work-Hardened Steel Igniter Base with Glass Sealing
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Solution Overview
Problem
Conventional igniter bases for pyrotechnic systems have limited load-bearing capacity and high material costs, which can lead to failure under mechanical stress, compromising the reliability of pyrotechnic systems.
Innovation Solution
A method involving a steel base body with a work-hardened structure and a glass material ring around a metal pin, heated to a glass-wetting temperature for a controlled duration to create a secure glass/metal connection, preserving structural transformations for enhanced strength and resilience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional glass feedthrough is used in igniter base, then the igniter base can be manufactured with standard processes, but the load-bearing capacity is limited and material costs are high
Solution Approach 1:
The patent applies parameter changes by heating the igniter base to a controlled temperature range (200-400°C) during the glass sealing process. This temperature parameter optimization allows the glass material to achieve proper sealing and bonding without excessive heat that would weaken the steel base body, thereby increasing load-bearing capacity while reducing material consumption through more efficient material utilization
Solution Approach 2:
The patent employs composite materials by combining steel base body with glass sealing material in a controlled manner. The glass material is applied in controlled quantities and heated to specific temperatures to achieve optimal bonding, creating a composite structure that maximizes strength while minimizing material consumption through precise material placement and activation
2Manufacturing precision
If heating time is extended to ensure complete glass melting and sealing, then bonding quality improves, but deformation martensite and dislocations in steel base body are lost, reducing strength
Solution Approach 1:
The patent resolves this contradiction by precisely controlling the heating temperature parameter (200-400°C) and heating duration. This optimized parameter combination ensures complete glass melting and sealing quality while limiting thermal exposure time sufficiently to preserve deformation martensite and dislocations in the steel base body, maintaining its strength properties
Solution Approach 2:
The patent applies partial action by providing just sufficient heating to achieve the minimum required glass sealing quality without excessive heating. The controlled temperature and time parameters ensure adequate bonding while avoiding the harmful effects of prolonged high-temperature exposure that would eliminate the steel's strengthening microstructures
3Quantity of substance
If igniter base dimensions are reduced to lower material costs, then material consumption decreases, but load-bearing capacity and ejection force are insufficient
Solution Approach 1:
The patent achieves this by changing the thermal processing parameters - heating to 200-400°C creates optimal glass flow and bonding characteristics that maximize the structural efficiency of the igniter base. This allows smaller dimensions to achieve the same or better load-bearing capacity and ejection force through improved material utilization and bonding quality
Solution Approach 2:
The composite structure of steel base body with thermally activated glass sealing creates a highly efficient load-bearing system. The optimized glass-steel interface through controlled heating provides superior bonding that allows dimensional reduction while maintaining force transmission capability, as the composite structure utilizes each material's properties more effectively
4Manufacturing precision
If conventional heating processes are used for glass sealing, then complete glass melting is achieved, but production time and energy consumption increase
Solution Approach 1:
The patent dramatically improves productivity by changing the heating temperature parameter to a lower range (200-400°C) with optimized time control. This parameter optimization achieves complete glass sealing and bonding quality in significantly reduced time compared to conventional high-temperature processes, thereby increasing production efficiency while maintaining manufacturing precision
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 method increases the load-bearing capacity and reduces material requirements, achieving higher ejection force and pin extraction force, allowing for smaller igniter bases to meet the same performance as larger conventional ones with lower energy and manufacturing costs.
Implementation Method 1
the melting arrangement formed in this way from the steel base body 2, glass material 5 and first metal pin 4 is heated to a glass-wetting temperature
Implementation Method 2
a steel base body 2 with structural transformations caused by deformation
Data Source
Figure 1
AI summary
The invention relates to a method for producing an igniter base (1) for pyrotechnic systems, in which a steel main body (2) is cold-worked thus undergoing structural transformations, a passage opening (3) is introduced into the steel main body (2), a first metal pin (4) and a glass material (5) that insulates the first metal pin (4) from the passage opening (3) are arranged in the passage opening (3), wherein the fusible assembly thus formed, comprising the steel main body (2), the glass material (5), and the first metal pin (4), is heated to a glass wetting temperature, and wherein a fusing time period for the heating of the fusible assembly is greater than the glass fusing duration and less than a structural reverse transformation duration.