Spark Plug Resistance Welding Electrode Elastic Deformation
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Solution Overview
Problem
Conventional resistance welding methods for spark plug manufacturing face instability due to dimensional and positional variations of components, leading to potential weakening of joint strength between spark plug members.
Innovation Solution
The method involves using a second welding electrode with an elastically deformable intermediate portion to maintain a stable pressing state during resistance welding, allowing for consistent load application and improved joint strength by adjusting the position and movement of the welding electrodes based on positional information and dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional resistance welding is performed with rigid welding electrodes, then the welding process is simple, but dimensional and positional variations of components cause unstable welding conditions and reduced joint strength
Solution Approach 1:
The welding electrode structure is changed from rigid to flexible by incorporating an elastically deformable intermediate portion, allowing the electrode to adapt its shape and maintain stable contact pressure despite dimensional and positional variations of components, thereby improving welding reliability
Solution Approach 2:
The welding electrode is designed with a flexible intermediate portion that can dynamically deform elastically during the welding process, enabling the electrode to self-adjust to component variations and maintain stable welding conditions, rather than relying on rigid fixed-position contact
2Manufacturing precision
If the welding electrode is made flexible with an elastically deformable intermediate portion, then stable welding conditions are achieved despite component variations, but the device complexity increases
Solution Approach 1:
The mechanical property parameter of the welding electrode is changed from rigid to flexible by adding an elastically deformable intermediate portion, enabling the electrode to maintain constant contact pressure and stable welding conditions while accommodating component dimensional and positional variations
Solution Approach 2:
The elastically deformable intermediate portion acts as a mediator between the rigid electrode body and the workpiece, absorbing dimensional and positional variations through elastic deformation while transmitting stable contact pressure to ensure consistent welding conditions
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
This approach stabilizes the welding condition, ensuring strong joints between spark plug components by compensating for variations in component dimensions and positions, thereby enhancing the overall strength and reliability of the spark plug.
Implementation Method 1
a second welding electrode which has an elastically deformable intermediate portion and which is in contact with the second member
Implementation Method 2
the first member and the second member are joined together by resistance welding
Data Source
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AI summary
A method of manufacturing a spark plug includes a joining step of joining a first member and a second member which constitute the spark plug. In the joining step, a first welding electrode in contact with the first member and a second welding electrode which has an elastically deformable intermediate portion and which is in contact with the second member are electrically connected through the first member and the second member, whereby the first member and the second member are joined together by resistance welding.