Rotational Connector for Welding Torch Reducing Wear
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Solution Overview
Problem
Existing rotational connections between welding torches and power cables in MIG welding systems experience fatigue and wear due to applied rotational forces, leading to potential breakage and damage with extended use.
Innovation Solution
A rotational connector design featuring an enclosure, end cap, torch stud, cable stud, and biasing member, which includes a bearing and sealing members, allows for secure engagement and rotation while maintaining electrical and gas flow, utilizing a biasing member to ensure contact and retention surfaces engage, and a bearing for reduced friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a non-rotational connection is used between cable and welding torch, then the connection structure is simple, but the connection breaks due to fatigue from rotational forces
Solution Approach 1:
A rotational connector assembly acts as an intermediary component between the cable and welding torch, allowing rotational movement while maintaining secure electrical and fluid connections. The connector includes a cable connector portion that receives the cable and a torch connector portion that attaches to the welding torch, with bearing members enabling rotation between these portions.
Solution Approach 2:
The connection is designed to be dynamic rather than static, incorporating bearing members that enable the welding torch to rotate freely relative to the cable supply. This dynamic capability accommodates rotational forces during welding operations while the biasing member maintains continuous contact pressure for reliable connections.
2Ease of operation
If a known rotational connection is used, then rotation is enabled, but the connection wears out and becomes damaged with extended use
Solution Approach 1:
Traditional mechanical friction-based rotational connections are replaced with bearing members that reduce friction and wear. The bearing members enable smooth rotation between the cable connector and torch connector portions while significantly reducing wear and heat generation during extended use.
Solution Approach 2:
The biasing member applies continuous contact pressure to maintain engagement between connection surfaces before wear occurs. This pre-applied force ensures that electrical contacts and fluid seals remain engaged throughout operation, compensating for any dimensional variations or wear that may develop over time.
3Measurement precision
If rotational forces are applied to a fixed connection, then the welding torch can be positioned accurately, but fatigue causes eventual breakage
Solution Approach 1:
The connection transitions from a fixed rigid structure to a dynamic rotational joint that can accommodate torch positioning movements. The bearing members allow the torch to be positioned at various angles while the biasing member maintains connection integrity, preventing fatigue-induced failure even during extended positioning adjustments.
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 enhances the durability and reliability of the connection by reducing wear and fatigue, enabling the welding torch and cable to rotate freely while maintaining a secure, low-friction, and sealed interface, thus extending the lifespan of the connection.
Implementation Method 1
a biasing member (25) disposed between the end cap biasing surface (22a) and the torch stud biasing surface (23e) urging the torch stud contact surface (23d) into engagement with the cable stud contact surface (24d)
Implementation Method 2
enabling the welding torch and cable to rotate freely while maintaining a secure, low-friction, and sealed interface
Data Source
AI summary
A rotational connector for connecting a welding power cable to a welding torch may include an enclosure, an end cap, a torch stud, a cable stud, and a biasing member. The enclosure may have an internal surface. The end cap may have an end cap biasing surface. The end cap operably connects to the enclosure. The torch stud may include a flange that has a contact surface and a biasing surface. The cable stud may include a flange that has a contact surface and a retention surface. The cable stud retention surface may have a shape corresponding to the enclosure internal surface. The biasing member may be disposed between the end cap biasing surface and the torch stud biasing surface urging the torch stud contact surface into engagement with the cable stud contact surface and urging the cable stud retention surface into engagement with the enclosure internal surface.