Self-Combusting Welding Tape for Portable Metal Joining
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Solution Overview
Problem
Conventional metal welding methods require large spaces, are not portable, and demand high expertise and safety concerns, making them unsuitable for non-professional use and complex applications, especially in damp or wet environments.
Innovation Solution
A self-adhesive welding tape with a self-combusting exothermic substance and a welding additive, enclosed in a heat shield and pressure chamber, allowing for portable and safe thermal connection of metal workpieces, even in challenging environments, with adjustable temperature and wide weld seams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional fusion welding methods are used, then strong metal connections are achieved, but large space requirements and lack of portability occur due to auxiliary units
Solution Approach 1:
The invention extracts the essential welding function from complex auxiliary units and concentrates it into a compact tape structure containing exothermic substance and welding material, eliminating the need for large welding plants, gas cylinders, and power equipment while maintaining connection strength
Solution Approach 2:
The welding material is nested within the tape structure alongside the exothermic substance, with both materials contained within a compact flexible format that can be easily transported and stored, achieving strong connections without requiring large external equipment
2Strength
If conventional welding methods are used, then metal workpieces can be connected, but long training periods and high expertise requirements are needed
Solution Approach 1:
The tape contains pre-configured exothermic substance and welding material in correct proportions and positions, allowing the system to self-regulate the welding process without requiring operator expertise in heat control, material selection, or technique, enabling non-professionals to achieve strong connections
Solution Approach 2:
The welding material and exothermic substance are pre-prepared and positioned within the tape during manufacturing, with all necessary components for successful welding already in place before use, eliminating the need for on-site preparation, mixing, or skill development
3Strength
If conventional welding methods are used, then metal connections are achieved, but safety dangers arise from unprofessional implementation
Solution Approach 1:
The controlled tape structure with pre-measured exothermic substance and welding material eliminates safety risks associated with unprofessional operation, as the system self-regulates temperature and material application, preventing common welding errors and hazards even when used by non-professionals
Solution Approach 2:
The invention changes the temperature parameter from high-temperature conventional welding to low-temperature exothermic reaction, reducing safety hazards while maintaining connection strength through the controlled release of thermal energy within the tape structure
4Strength
If aluminothermic welding with crucible is used, then rail connections are achieved, but the method is unsuitable for complex welding and damp environments
Solution Approach 1:
The tape uses a flexible thin-film structure that can be easily applied to complex geometries and surfaces, unlike rigid crucibles, and the flexible format allows use in various orientations including overhead applications while maintaining weld connection quality
Solution Approach 2:
The invention changes from handling loose powdered welding medium in open crucibles to using pre-encapsulated materials in a sealed flexible tape, preventing moisture contamination and enabling use in damp environments while maintaining weld connection strength
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
Enables reliable and efficient welding by non-professionals, reducing space requirements and improving weld quality, with the ability to operate in confined or wet conditions and overhead applications.
Implementation Method 1
provision is made for a self-combusting exothermic substance which when igniting provides the thermal energy which is required for the welding
Implementation Method 2
A non-combustible heat shield, which withstands the burn-off temperature of the exothermic substance and which counteracts the escape of heat to the outside
Implementation Method 3
provision is made for a welding additive which melts during burn-off of the exothermic substance and can bond with the workpieces to be connected
Implementation Method 4
provision is made at least in side edge regions of the inner cover layer for adhesive layers by means of which the welding tape can be fastened to the workpieces to be connected
Data Source
AI summary
A welding tape for thermally connecting metal workpieces by fusion, wherein the welding tape in a cross section has an outwardly closing cover layer which comprises an inner cover layer and an outer cover layer, wherein in the transverse direction provision is made at least in side edge regions of the inner cover layer for adhesive layers by means of which the welding tape can be fastened to the workpieces to be connected, wherein in the interior of the cover layer provision is made for a self-combusting exothermic substance, which during ignition provides the thermal energy which is required for the welding, wherein a non-combustible heat shield is arranged exclusively between the exothermic substance and the outer cover layer, and wherein a welding additive is provided between the exothermic substance and the inner cover layer.