Integrated Welding Power Source for Wire Preheating
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Solution Overview
Problem
Conventional welding processes require separate power sources and control circuitry for preheating and welding, increasing complexity and cost, whereas the need for a single power source capable of providing both welding and preheating power is not adequately addressed.
Innovation Solution
A welding power source with integrated power conversion circuits that outputs both welding and preheating power from a single input, reducing the complexity and cost by enabling wire preheating, which reduces heat input, increases deposition, and minimizes hydrogen in the electrode wire and weld.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power sources are used for preheating and welding, then preheating and welding can be performed independently, but device complexity and cost increase
Solution Approach 1:
The patent combines separate preheating power source and welding power source into a single integrated power source. The power source includes a transformer with primary and secondary windings, where the secondary winding provides both preheating current through a preheating circuit and welding current through a welding circuit, eliminating the need for separate power sources while maintaining independent control of both functions
Solution Approach 2:
The single power source is designed to perform multiple functions: it can independently provide preheating current to the electrode wire, independently provide welding current to the welding electrode, and control both functions through a unified control system. This multi-functional design reduces device complexity while maintaining operational independence
2Reliability
If separate power sources are used for preheating and welding, then each function can be optimized independently, but cost increases
Solution Approach 1:
The patent merges separate power sources into a single integrated unit sharing common components such as the transformer, control circuitry, and housing. This consolidation reduces manufacturing costs by eliminating duplicate components while maintaining the ability to independently optimize preheating and welding functions through separate control circuits
Solution Approach 2:
The integrated power source provides universal functionality for both preheating and welding operations. The control system can independently regulate preheating current and welding current, allowing each function to be optimized for its specific requirements while sharing the same physical platform, thereby reducing overall system cost
3Productivity
If wire preheating is implemented, then welding efficiency improves and heat input reduces, but additional power conversion circuits are required
Solution Approach 1:
The patent integrates the preheating power conversion circuit and welding power conversion circuit within a single power source unit. The transformer's secondary winding is configured to provide both preheating current and welding current through different circuits, eliminating the need for separate external power conversion equipment while enabling wire preheating to improve welding efficiency
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 allows for efficient wire preheating, reducing arc energy, improving welding efficiency, and simplifying the welding process by using a single power source for both welding and preheating, thereby enhancing the quality and cost-effectiveness of the welding operation.
Implementation Method 1
electrode wire preheating by a resistive preheating assembly
Implementation Method 2
Electrical power is applied to the welding wire and a circuit is completed through the workpiece to sustain a welding arc that melts the electrode wire and the workpiece
Data Source
AI summary
An example conversion apparatus for a welding torch includes: an insulator configured to be mechanically coupled to a first component of a welding torch, to insulate the first component from a first contact tip, and to guide shielding gas through a bore of the insulator, wherein the first component is configured to be in electrical contact with a second contact tip; and a contact tip holder configured to be attached to the welding torch via the insulator, to hold the first contact tip, to conduct welding current to the first contact tip, and to receive the shielding gas from the insulator.