Heat Shield Recess for Induction Welding Temperature Control
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Solution Overview
Problem
Induction welding requires precise temperature control to prevent surface burning while maintaining a melting temperature at the bond line, which existing technologies struggle to achieve effectively.
Innovation Solution
An induction welding assembly that includes an induction welding coil, a heat shield with a recess aligned with the coil, and supports engaging the heat shield at specific locations, allowing the coil to be positioned closer to the workpiece and maintaining effective temperature management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the induction welding coil is positioned closer to the workpiece to improve welding efficiency, then the welding speed increases, but the top surface of the workpiece is more prone to burning
Solution Approach 1:
A heat shield is introduced as an intermediary component positioned between the induction welding coil and the workpiece. The heat shield acts as a thermal barrier that prevents excessive heat from directly contacting the workpiece surface, thereby preventing burning while allowing the coil to be positioned close to the workpiece for efficient welding.
Solution Approach 2:
The heat shield is designed with a recessed portion that creates a localized thermal zone. The recess allows concentrated heat delivery to the bond line area while the surrounding heat shield material provides thermal protection to the broader workpiece surface, achieving localized heating where needed while protecting against unwanted heat effects.
2Temperature
If a heat shield is added to prevent surface burning, then temperature control improves, but the device complexity increases
Solution Approach 1:
The heat shield is integrated with the support structure that holds the induction welding coil. By combining the heat shield function with the existing support assembly, the design avoids adding a completely separate complex system. The heat shield becomes part of the structural framework, reducing overall assembly complexity while maintaining temperature control capability.
3Temperature
If the heat shield thickness is increased to improve thermal protection, then temperature control improves, but the coil positioning flexibility is reduced
Solution Approach 1:
The heat shield is designed with a recessed portion that segments the thermal protection into two functional zones: the recessed area that allows close coil positioning and heat delivery, and the surrounding thicker areas that provide thermal protection. This segmentation enables the heat shield to simultaneously achieve both thermal protection and positioning flexibility.
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 solution enables precise temperature control, preventing surface burning and ensuring a consistent melting temperature at the bond line, thereby improving the efficiency and quality of the induction welding process.
Implementation Method 1
induction welding requires enhanced temperature control to prevent the top surface of the workpiece from burning, while maintaining a melting temperature at the bond line between an adjacent pair of workpiece members
Implementation Method 2
The induction welding coil is operated to induction weld the first workpiece member to the second workpiece member
Implementation Method 3
The heat shield is disposed between the induction welding coil and the workpiece zone in a first dimension
Data Source
AI summary
An assembly is provided for induction welding. This assembly utilizes a heat shield (e.g., a mica heat shield) with a recess. An induction welding coil may be disposed within this heat shield recess during induction welding operations. The wall thickness of the heat shield within the recess may be reduced to enhance heat transfer to a workpiece during induction welding operations. Members may engage the heat shield on opposite sides of the recess (and that have an increased wall thickness) to support both the heat shield and the workpiece during induction welding operations, during which a biasing force may be exerted on both the heat shield and workpiece.