Welding Wire Preheating to Reduce Cast and Feed Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional welding techniques face challenges with wire cast, leading to inconsistent wire placement and increased force requirements, particularly in submerged arc welding and GMAW processes, due to mechanical straightening methods that can exacerbate stress in wires like stainless steel, nickel-based, and titanium wires.
Innovation Solution
A preheating system using resistive heating (Joule heating) to reduce wire cast by applying electrical current through the welding wire, eliminating the need for mechanical straightening, and ensuring consistent wire placement by controlling the preheating current based on wire diameter and composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical straightening is used to reduce wire cast, then wire placement consistency is improved, but wire stress and force requirements increase
Solution Approach 1:
The patent replaces mechanical straightening systems with an electrical preheating system. Electrical current is passed through the welding wire to heat it to a temperature that reduces wire cast through thermal relaxation of internal stresses, eliminating the need for mechanical roller systems that apply force to straighten the wire. This substitution of electrical heating for mechanical straightening resolves the contradiction by improving wire placement consistency without increasing wire stress or force requirements.
Solution Approach 2:
The patent changes the temperature parameter of the welding wire by applying electrical heat to raise the wire temperature to a range that reduces wire cast. By controlling the wire temperature through electrical preheating, the system achieves consistent wire placement without the mechanical forces required by traditional straightening methods, thereby resolving the force requirement issue.
2Manufacturing precision
If mechanical straightening is used to reduce wire cast, then wire placement consistency is improved, but wire stress increases
Solution Approach 1:
The patent replaces mechanical straightening systems with an electrical preheating system. Electrical current is passed through the welding wire to heat it to a temperature that reduces wire cast through thermal relaxation of internal stresses, eliminating the need for mechanical roller systems that apply force to straighten the wire. This substitution of electrical heating for mechanical straightening resolves the contradiction by improving wire placement consistency without increasing wire stress.
Solution Approach 2:
The patent utilizes thermal phase transition effects by heating the wire to a temperature range that allows stress relaxation without reaching the melting point. The thermal energy enables the wire material to undergo microstructural changes that reduce internal stresses and wire cast, achieving consistent placement without mechanical stress application.
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 preheating system reduces wire cast, decreases the force required for wire feeding, and enhances wire placement precision without mechanical deformation, improving the consistency and efficiency of welding processes.
Implementation Method 1
A preheating system using resistive heating (Joule heating) to reduce wire cast by applying electrical current through the welding wire
Data Source
AI summary
Systems, methods, and apparatus to reduce cast in a welding wire are disclosed. Example systems to reduce cast in a welding wire include a wire advancement roller configured to advance welding wire from a welding wire supply toward a welding torch; and a wire straightener configured to reduce cast in the welding wire by applying heat to the welding wire between the welding wire supply and the welding torch.