Angled MIG Torch Nozzle Adapter for Confined-Space Welding
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Solution Overview
Problem
Standard MIG welding torches face difficulties in accessing confined spaces due to the limited geometry and size of their nozzles, which restrict their ability to weld in areas like the top of an automobile tail pipe beneath a heat shield, where clearance heights are insufficient for standard nozzle dimensions.
Innovation Solution
A modular adapter system that extends and modifies the MIG welding torch's nozzle, comprising a conductive collar, wire guide, entry and exit adapters, and spacers, allowing for adjustable diameters and angles to accommodate smaller spaces, while maintaining electrical conductivity and gas flow, enabling the torch to be used in spaces as small as 1 inch clearance height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If standard nozzle dimensions are used, then the welding torch can maintain proper shielding gas flow and electrical conductivity, but it cannot access confined spaces with limited clearance heights
Solution Approach 1:
The adapter divides the nozzle extension function into multiple components: a collar that attaches to the contact tip, a wire guide with bending sections, and spacers that maintain proper spacing. This segmentation allows the system to navigate confined spaces while maintaining functional integrity of gas flow and electrical conductivity paths
Solution Approach 2:
The wire guide incorporates bending sections that change the spatial orientation of the welding wire path. By introducing curved geometries, the system can reach into confined areas from different angles, effectively adding dimensional flexibility to overcome clearance limitations
2Ease of operation
If the nozzle is extended to reach confined spaces, then access to hard-to-reach areas is improved, but the complexity of the device increases
Solution Approach 1:
The adapter integrates multiple functions into a single device: the collar provides electrical conductivity and mechanical attachment, the wire guide directs the welding wire through complex paths, and the spacers maintain proper spacing for gas flow. This multi-functionality reduces the need for multiple separate components while achieving the goal of accessing confined spaces
Solution Approach 2:
The adapter components are designed to nest together: the wire guide fits within the collar structure, and spacers are positioned within the assembled configuration. This nesting approach compactly packages the extended functionality without proportionally increasing overall device complexity
3Ease of operation
If the nozzle geometry is modified to reduce diameter, then access to tight spaces is improved, but the shielding gas flow and electrical conductivity may be compromised
Solution Approach 1:
The adapter maintains different dimensional characteristics at different locations: the wire guide has a small outer diameter for navigating tight spaces, while the collar and spacer sections maintain larger dimensions to ensure proper gas flow paths and electrical conductivity. This local differentiation allows the system to access confined spaces without compromising functional reliability
4Ease of operation
If the approach angle is reduced to 45 degrees to reach confined spaces, then access is improved, but the required clearance height increases
Solution Approach 1:
The wire guide incorporates curved bending sections that allow the welding wire to change direction smoothly. This curvature enables the torch to approach workpieces at various angles, including steep angles that reduce the required clearance height, while still maintaining proper wire feed and electrical conductivity through the curved path
Data Source
AI summary
A MIG welding torch adapter that attaches to and/or replaces a welding torch's nozzle and enables welding in confined spaces includes: (1) a wire guide, (2) a turning nozzle that is concentric with and encloses said wire guide, (4) a collar that detachably slip-fits onto a MIG welding torch's contact tip, (5) an attachment tube that attaches to the nozzle, (6) an entry guide wire adapter that directs the free end of the torch's electrode wire move into the wire guide, (7) an exit guide wire adapter that guides the electrode wire as it exits this adapter, and (8) entry and exit spacers that enable the torch's shielding gases to flow through this adapter.