Elastic Tapered Electrode Joining for Uniform Metal Heating
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Solution Overview
Problem
Existing joining apparatuses face challenges in achieving uniform heat generation and contact between metal members due to machining variations, leading to potential local abnormal heat generation and insufficient heating, which affects the joining quality.
Innovation Solution
A joining apparatus and method that utilize a tapered outer circumferential surface on an electrode unit, which can elastically deform to fit a tapered pressure-receiving surface on a metal member, ensuring uniform contact and heat distribution during electrification and pressurization, even with shape variations caused by machining errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pressure-receiving surface and abutting surface are precisely adjusted to achieve uniform contact, then joining quality is improved, but manufacturing complexity and time increase due to the need for high precision adjustment
Solution Approach 1:
The abutting section is designed with elastic deformability, allowing it to dynamically adapt its shape to match the pressure-receiving surface. This dynamic adaptation eliminates the need for precise static adjustment, as the elastic material automatically conforms to surface variations through deformation during the joining process.
Solution Approach 2:
The invention changes the physical parameter of the abutting section from rigid to elastic, enabling it to deform and adapt to the pressure-receiving surface geometry. This parameter change allows the system to achieve uniform contact without precise adjustment by utilizing the elastic deformation capability to compensate for machining variations.
2Device complexity
If the abutting section is made rigid for structural stability, then device simplicity is maintained, but contact uniformity deteriorates due to inability to compensate for machining variations
Solution Approach 1:
The abutting section transitions from a rigid structure to an elastic component, changing its mechanical parameter to enable deformation. This allows the simple elastic structure to automatically adapt to surface variations, achieving both structural simplicity and contact uniformity simultaneously.
3Manufacturing precision
If machining tolerance is tightened to ensure uniform contact, then joining quality is improved, but production time and cost increase
Solution Approach 1:
By changing the abutting section from rigid to elastic, the system compensates for machining variations without requiring tight tolerances. The elastic deformation automatically adapts to within-tolerance variations, maintaining joining quality while allowing standard machining tolerances and improving production efficiency.
4Temperature
If the tapered surfaces are made to fit precisely, then heat distribution is improved, but the risk of local abnormal heat generation increases due to sensitivity to misalignment
Solution Approach 1:
The elastic abutting section provides dynamic adaptation during the joining process, continuously conforming to the pressure-receiving surface as contact is established. This dynamic conformation ensures uniform heat distribution while reducing sensitivity to initial misalignment, preventing local abnormal heat generation.
Solution Approach 2:
The elastic deformability acts as a cushioning mechanism that absorbs and compensates for potential misalignments before they can cause problematic heat concentration. This beforehand cushioning through elastic deformation prevents the development of localized stress and heat anomalies.
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 allows for consistent heat generation across the joining surfaces, improving the quality of the metal-to-metal bond and enhancing mass production efficiency by ensuring equal heat distribution and contact, regardless of machining tolerances.
Implementation Method 1
at least part of the abutting section having a thickness capable of elastically deforming in such a manner that, during application of a pressurizing force to the first metal member and the second metal member, the tapered outer circumferential surface fits the tapered pressure-receiving surface
Implementation Method 2
a first joining surface provided on an outer circumferential side of a circular ring-shaped first metal member, and a second joining surface provided on an inner circumferential side of an insertion port of a second metal member into which the first metal member is inserted, are joined by electrification and pressurization
Data Source
AI summary
An electrode unit of a joining apparatus includes an abutting section provided with a tapered outer circumferential surface that contacts a tapered pressure-receiving surface by being inserted into an inside of a first metal member. The tapered outer circumferential surface inclines in a direction of getting closer to an axial center of the abutting section from one end side to another end side. At least part of the abutting section has a thickness elastically deformable in such a manner that the tapered outer circumferential surface aligns with the tapered pressure-receiving surface during application of a pressurizing force to the first metal member and a second metal member.