Quick-Change Gooseneck Liner for Precise MIG Wire Feeding

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing MIG welding torches with removable goosenecks face issues with precise mating and alignment of liners, leading to wire feeding problems due to improper length measurements, which can be exacerbated by changes in main liner length during operation.

Innovation Solution

A quick-change liner system with a liner guide, transition section, and sealing feature that allows for precise alignment and pneumatic sealing, enabling the gooseneck to rotate without affecting liner length, and accommodating changes in main liner length without requiring manual adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a removable gooseneck with compound liner is used, then the gooseneck can be replaced or rotated without resizing the main liner, but the main liner must extend beyond the distal end of the welding torch to a precisely measured length, which is difficult to achieve and maintain

Engineering Contradiction:

Improvegooseneck replaceabilityVSAvoidliner length measurement

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The liner system is divided into a main liner and a jump liner that can be separately installed and removed. The jump liner is specifically positioned within the gooseneck portion, allowing the main liner to remain fixed in the torch body while the gooseneck assembly (containing the jump liner) can be replaced or rotated without affecting the main liner's position or requiring its resizing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The jump liner acts as an intermediary component between the main liner and the gooseneck. It extends from the proximal end of the gooseneck to a measured point beyond the distal end of the gooseneck, and when the gooseneck is mated to the welding torch body, the portion of the main liner extending beyond the torch body is inserted into a hollow portion of the mechanical stop of the jump liner, effectively creating a continuous liner path without requiring the main liner to be precisely measured to extend beyond the distal end of the welding torch body.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the main liner extends beyond the distal end of the welding torch to a measured length, then proper mating with the gooseneck is achieved, but wire feeding issues occur if the length is not precisely met

Engineering Contradiction:

Improvegooseneck matingVSAvoidwire feeding

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The jump liner includes a mechanical stop that automatically limits the insertion depth of the main liner when the gooseneck is mated to the welding torch body. This self-limiting mechanism ensures that the main liner extends to the correct measured length without requiring manual measurement or adjustment by the operator, thereby ensuring proper mating and preventing wire feeding issues.

Inventive Principle:

Principle #25Self-service

3Strength

If a locking collar is used to attach the gooseneck, then the gooseneck can be securely attached, but the liner alignment and positioning become difficult to control

Engineering Contradiction:

Improvegooseneck attachmentVSAvoidliner alignment

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

The jump liner is pre-installed into the proximal end of the gooseneck before the gooseneck is attached to the welding torch body. The mechanical stop on the jump liner is pre-positioned to define the correct insertion depth. When the gooseneck is subsequently mated to the welding torch body using the locking collar, the main liner is automatically guided into proper alignment by the hollow portion of the mechanical stop, ensuring precise liner positioning without requiring additional alignment steps.

Inventive Principle:

Principle #10Preliminary action

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

Ensures consistent wire feeding and secure attachment of the gooseneck, preventing twisting and falling, while allowing for easy replacement and rotation, thus maintaining operational efficiency and reducing the need for manual measurements.

Implementation Method 1

The sealing feature of the replaceable liner can create a pneumatic seal during operation of the welding torch assembly

Methodology Applied

Scientific EffectPneumatic sealing:

Data Source

PatentUS12440913B2Quick-change liner for use in a removable gooseneck assembled in a welding torch

Publication Date: 2025.10.14 AMERICAN TORCH TIP CO

AI summary

A replaceable or quick-change liner for use in a welding torch assembly that includes a liner guide, a section of liner, and a sealing feature for creating a pneumatic seal between the replaceable liner and the welding torch assembly.