Flexible Welding Torch Handle for Reduced Wrist Strain
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Solution Overview
Problem
Current TIG welding torch handles cause strain and fatigue in the wrist and arm due to stiffness, and frequent position changes, and the handles are often slippery, leading to reduced welding quality and increased strain. Additionally, existing solutions with flexible necks have short lifespans due to deformation and durability issues.
Innovation Solution
A welding torch handle made of flexible silicone rubber that allows the cable to bend internally, reducing strain and fatigue, and features a grip-enhancing pattern and inserts for secure attachment, improving handling and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a stiff handle made of heat resistant material is used, then the handle can withstand high welding temperatures, but it causes strain to the wrist and arm resulting in fatigue and pain
Solution Approach 1:
The handle is divided into multiple segments that can flex relative to each other, allowing the handle to bend and absorb mechanical stress without transmitting it to the welder's wrist and arm, while maintaining heat resistance through the material composition of each segment
Solution Approach 2:
The material properties of the handle are changed by using a composite material that combines heat resistance with flexibility, altering the mechanical parameters from completely rigid to semi-flexible while maintaining thermal performance
2Adaptability or versatility
If a spherical joint is fitted for cable connection, then the cable can be connected to the handle, but it does not overcome the problem of needing to change welding positions and causes strain
Solution Approach 1:
The handle incorporates dynamic flexibility through its segmented construction, allowing it to adapt to different welding positions and angles without requiring a spherical joint, while maintaining secure cable connection through integrated cable management features
3Adaptability or versatility
If a bendable neck is used to allow angular working positions, then the torch can reach difficult locations, but the great deformations cause fractures in the structure resulting in short useful life
Solution Approach 1:
The neck is divided into multiple small segments that can flex incrementally, distributing the deformation across many small joints rather than one large bend, which prevents stress concentration and structural failure while maintaining angular working position capability
Solution Approach 2:
The segmented neck structure acts as a flexible element that can bend repeatedly without fracturing, similar to how flexible shells and thin films can deform elastically, allowing the torch to reach difficult locations while maintaining long-term reliability
4Strength
If hard and slippery material is used for the handle, then the handle can withstand heat and mechanical stress, but it reduces grip security requiring more pressure from the hand grip which increases strain
Solution Approach 1:
The handle surface is given different local qualities - the outer surface has increased friction for grip security while the internal structure maintains heat and mechanical stress resistance, allowing both requirements to be satisfied in different regions of the same component
Solution Approach 2:
The handle uses composite material construction combining materials with different properties - one layer or surface treatment provides high friction for grip, while the base material provides heat and mechanical stress resistance, achieving both grip security and structural strength
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 flexible handle reduces wrist and arm fatigue, enhances grip security, and extends the torch's lifespan by distributing stress and providing a durable, non-slip surface for improved welding efficiency and quality.
Implementation Method 1
the handle comprises a body made of flexible material, such as silicone rubber, for allowing movement of the distal end of the handle in relation to a proximal end of the handle
Data Source
Figure 1~2d
Figure 3~4
AI summary
The disclosure relates to a handle (11) for a welding torch (1) for arc welding, the welding torch (1) comprising a holder (12) for retaining a welding electrode (2) and for transmitting electric current to the welding electrode (2), and a neck (13) attached to the holder (12) for supporting the holder (12) and for transmitting electric current to the holder (12), wherein the neck (13) is arranged to be connected to a cable (3) for transmitting electric current to the neck (13), the handle (11) is arranged to be attached to the neck (13) at a distal end (113) of the handle (11), the handle (11) is arranged to receive the cable (3) inside the handle (11), and the handle (11) comprises a body (115) made of flexible material, such as silicone rubber, for allowing movement of the distal end (113) of the handle (11) in relation to a proximal end (114) of the handle (11). The disclosure relates also to a welding torch (1) for arc welding.