Oval Wire Guide Conduit With Local Hardening for Low-Friction Feeding
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Solution Overview
Problem
Existing weld wire conduits with rectangular or circular cross-sections suffer from friction issues and wear, leading to inefficiencies and failures in MIG welding systems due to exposed edges and soft metal wear, which results in shaving, residue buildup, and increased force requirements.
Innovation Solution
A coiled wire guide conduit with an oval or elliptical cross-section and locally hardened regions created through surface heat treatment, such as laser treatment, to reduce wear and friction, ensuring improved longevity and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If wire with rectangular cross-section is used to form conduit, then conduit structure is simple to manufacture, but exposed edges increase friction and damage weld wire surface
Solution Approach 1:
The patent applies asymmetry by transitioning from rectangular wire cross-section to round wire cross-section. This eliminates the exposed edges that cause friction and wire damage while maintaining manufacturability. The round cross-section provides a smooth internal surface that reduces harmful friction effects on the weld wire.
Solution Approach 2:
The patent changes the physical parameter of wire cross-sectional shape from rectangular to circular. This parameter change eliminates the edge-related friction problems while preserving the structural integrity and manufacturability of the conduit. The circular geometry provides continuous contact surfaces without sharp edges.
2Ease of operation
If soft metal wire is used to form conduit, then conduit is flexible and easy to install, but wear increases leading to shaving and residue buildup
Solution Approach 1:
The patent applies local quality by creating hardened regions at specific locations on the wire surface through selective heat treatment. The wire maintains its overall soft and flexible properties for ease of installation, while localized hardened zones provide wear resistance to prevent shaving and residue buildup during wire feeding operations.
Solution Approach 2:
The patent applies preliminary action by pre-hardening specific surface regions of the wire before the conduit is assembled and put into service. This preliminary heat treatment creates wear-resistant zones that will protect against friction-induced damage during subsequent wire feeding operations, preventing reliability issues before they occur.
3Force
If high friction occurs in conduit, then more force is required to move weld wire, but this leads to binding and system failure
Solution Approach 1:
The patent changes the surface hardness parameter of the wire through selective heat treatment. This creates regions of increased hardness that reduce friction coefficients during wire feeding, thereby reducing the force required to move the weld wire through the conduit while preventing binding and system failure.
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 significantly reduces friction and wear, enhancing the service life of the weld wire conduit and control cables by using locally hardened regions as wear bars, maintaining efficiency and preventing binding and failure in MIG welding systems.
Implementation Method 1
surface heat treatment process is performed to create locally hardened regions along the wire of the wire guide conduit. Such locally hardened regions can be provided by, for example, laser treatment or other directed energy processes which cause local heating of the surface of the wire
Implementation Method 2
The solution significantly reduces friction and wear, enhancing the service life of the weld wire conduit and control cables by using locally hardened regions as wear bars
Data Source
AI summary
A wire guide conduit is constructed from a coiled wire having an oval or elliptical cross-sectional shape. The wire is subjected to a directed energy beam to locally heat portions of the wire to create discrete areas of increased hardness in the surface of the wire. The wire is coiled to present the locally hardened regions on an inside passageway of the conduit. The wire guide conduit may be used in additional applications such as a control wire for an actuation system.