Multifunctional Pressure Pads for Thin Induction Welding
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Solution Overview
Problem
Conventional induction welding systems are limited in welding thickness and cannot effectively weld thinner components due to the lack of heat removal mechanisms on the side opposite the induction welding coil, leading to potential deconsolidation and surface defects.
Innovation Solution
A compression load distributor with a thermally conductive heat sink and flexible carrier is used on the non-coil side to distribute pressure and remove heat, comprising a heat spreading layer and a support layer, allowing for even heat distribution and preventing overheating during induction welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional induction welding is used without heat removal mechanism, then the welding process is simple, but the component thickness is limited and deconsolidation occurs on thinner components
Solution Approach 1:
A heat sink is introduced as an intermediary component on the coil side of the weld to facilitate heat removal from the weldment. This heat sink acts as a mediator between the weld interface and the cooling system, enabling effective heat management on thinner components without complicating the overall welding process
Solution Approach 2:
The pressure pad is designed to perform multiple functions simultaneously: it applies compressive force to the weld interface while also serving as a heat sink for heat removal. This multi-functionality allows the system to handle a broader range of component thicknesses without requiring separate heating and cooling devices
2Object-affected harmful factors
If heat is removed only from the coil side, then the system is simple, but heat accumulates on the weld side causing surface defects
Solution Approach 1:
Instead of removing heat only from the coil side where the induction coil is located, the system implements heat removal from both the coil side and the weld side. This inverted approach of adding heat removal capability on the previously uncooled weld side prevents heat accumulation and associated surface defects
3Stability of the object's composition
If compressive force is applied without heat management, then the welding process is straightforward, but heat distribution is uneven causing deconsolidation
Solution Approach 1:
The heat sink and pressure pad are merged into a single integrated component that simultaneously performs both heat removal and pressure distribution functions. This combination eliminates the need for separate heating and pressing mechanisms, ensuring even heat distribution and pressure application across the weld interface
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 solution enables the welding of thinner components by effectively managing heat and pressure, preventing deconsolidation and surface defects, and enhancing the efficacy of the induction welding process.
Implementation Method 1
Induction welding uses electromagnetic induction to heat components without contacting the components
Implementation Method 2
heat is applied to the weld interface
Implementation Method 3
heat is transferred from the surface of the weldment nearest the coil and into a heat sink on the coil side of the weld
Data Source
AI summary
A compression load distributor includes a support layer and a heat spreading layer. The support layer includes a flexible carrier configured to distribute a load from a compression load applying device. The heat spreading layer is coupled to and carried on the support layer, the heat spreading layer comprising a heat sink configured to transfer heat throughout the compression load distributor. The heat sink is thermally conductive and electrically non-conductive.