Induction Filler Joining for Dissimilar Substrates at Lower Heat
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Solution Overview
Problem
Conventional welding methods often require high temperatures and are inefficient, especially when joining dissimilar materials, as they rely on heat sources like gas flames or electric arcs, which can be inefficient and difficult to control.
Innovation Solution
An induction-based system that uses a filler material with electrically conducting and/or magnetic properties, applied between substrates, is heated to a reaction temperature via an alternating magnetic field, releasing energy to join the substrates upon cooling, allowing for precise thermal control and efficient bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional welding methods using gas flames or electric arcs are used to join substrates, then the substrates can be joined together, but the process requires high temperatures and is inefficient
Solution Approach 1:
The patent replaces conventional thermal welding systems (gas flames, electric arcs) with an induction heating system that uses electromagnetic fields to directly heat the filler material. This substitution of heating mechanism eliminates the need for high-temperature external heat sources while maintaining effective joining capability, thereby improving efficiency and reducing overall temperature requirements.
Solution Approach 2:
The invention changes the heating parameters by using controlled induction heating at lower temperatures compared to conventional welding. By adjusting the induction heating parameters (frequency, power, duration) and selecting filler materials with appropriate melting points, the process achieves effective joining at reduced temperatures, resolving the contradiction between temperature requirements and joining efficiency.
2Adaptability or versatility
If conventional welding methods are used to join dissimilar materials, then the materials can be joined, but the process is difficult to control
Solution Approach 1:
The induction heating system provides precise control over heat input through electromagnetic field parameters, allowing independent control of heating rate, temperature, and duration. This replaces the difficult-to-control conventional welding processes and enables consistent joining of dissimilar materials with different thermal properties by optimizing induction heating parameters for each material combination.
Solution Approach 2:
The filler material acts as an intermediary that facilitates joining of dissimilar substrates. By selecting filler materials with intermediate properties between the dissimilar substrates and controlling their heating through induction, the process achieves compatible bonding while maintaining ease of control through the controlled energy input from the induction system.
3Strength
If high temperatures are used in welding to melt base materials, then the materials can be fused together, but the heating method is inefficient
Solution Approach 1:
The induction heating system directly energizes the filler material through electromagnetic induction, creating highly efficient energy transfer that melts the filler material quickly and locally. This replaces inefficient conventional heating methods and achieves the necessary bonding strength with significantly improved heating efficiency, as energy is delivered directly to the joint area without substantial heat loss to the surrounding materials.
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 method enables efficient and controlled joining of dissimilar materials by utilizing the energy release profile of the filler material, reducing the need for high temperatures and improving the bonding process, particularly suitable for joining plastics and metals.
Implementation Method 1
applying an alternating magnetic field to heat the electrically conducting material to a reaction temperature
Implementation Method 2
an induction heating assembly housed in the housing configured to: receive the filler material from the inlet; and apply an alternating magnetic field to inductively energize the electrically conducting material of the filler material
Implementation Method 3
in response to heating the electrically conducting material to the reaction temperature, energizing the joint using energy released from the electrically conducting material
Data Source
AI summary
An example method of joining a first substrate with a second substrate includes applying a filler material between respective portions of the first substrate and the second substrate, the filler material including an electrically conducting and/or magnetic material, wherein the filler material and the respective portions define a joint; applying an alternating magnetic field to the joint to heat the electrically conducting material to a reaction temperature; in response to heating the electrically conducting material to the reaction temperature, energizing the joint using energy released from the electrically conducting material; cooling the joint to join the first substrate with the second substrate.