Asymmetric Plasma Torch Tip for Wide Gouge Profiles
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Solution Overview
Problem
Traditional plasma arc torches with circular bores struggle to create wide gouge profiles in a single pass without oscillation, resulting in inconsistent surface textures and requiring skilled operators or complex machinery.
Innovation Solution
A torch tip assembly with a non-circular bore and counter bore feature, allowing for a diffused plasma arc with a non-circular cross-sectional shape, which can produce a gouge profile with a width-to-depth ratio greater than 3:1 without oscillation, by orienting the non-circular cross-sectional shape perpendicular to the gouge path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a traditional plasma arc torch with a circular bore is used, then the torch can perform standard cutting and gouging operations, but it cannot produce wide gouge profiles in a single pass without oscillation
Solution Approach 1:
The patent applies asymmetry by replacing the traditional circular bore with a non-circular bore (such as rectangular, oval, or other asymmetric cross-sections) in the nozzle. This asymmetric geometry directly enables the plasma arc to produce wide gouge profiles in a single pass without requiring torch oscillation, thereby increasing gouge width while maintaining simple torch configuration.
2Volume of moving object
If torch oscillation is used to widen the gouge profile, then the affected area increases, but inconsistent surface textures (scalloped and ribbed features) are produced
Solution Approach 1:
The non-circular bore geometry creates an asymmetric plasma arc distribution that naturally produces consistent surface textures across the wide gouge profile without requiring oscillation. The fixed asymmetric geometry ensures uniform material removal and consistent surface finish, eliminating the scalloped and ribbed features associated with oscillating torches.
3Volume of moving object
If repeated torch passing is used to make wider gouges, then the gouge width increases, but processing time increases and surface texture consistency deteriorates
Solution Approach 1:
The non-circular bore enables the plasma arc to create wide gouge profiles in a single continuous pass, eliminating the need for repeated torch passing. This asymmetric geometry allows the plasma energy to be distributed across a wider area simultaneously, significantly reducing processing time while maintaining consistent surface texture throughout the gouge.
4Manufacturing precision
If automated torch oscillation is used to minimize surface texture variations, then surface consistency improves, but processing time greatly increases
Solution Approach 1:
The non-circular bore geometry inherently produces consistent surface textures across the entire gouge profile in a single pass, eliminating the need for automated oscillation systems. The fixed asymmetric geometry ensures uniform plasma distribution and consistent material removal, achieving both surface texture consistency and high processing speed simultaneously.
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
Enables the creation of wide gouge profiles with improved surface texture consistency and reduced processing time, eliminating the need for oscillation and complex machinery, while maintaining depth control.
Implementation Method 1
a plasma arc, which is a constricted jet of an ionized gas with high temperature and sufficient momentum to assist with removal of molten metal
Implementation Method 2
The non-circular cross-sectional shape is configured to enable a second non-circular cross-sectional shape in the plasma arc adapted to diffuse the plasma arc
Data Source
AI summary
A torch tip assembly of a plasma arc torch is provided for delivering a diffused stream of plasma arc in a gouging operation. The assembly comprises a nozzle including a nozzle body defining a central longitudinal axis extending between a proximal end and a distal end. A nozzle exit orifice of the nozzle body defines at least a bore for conducting the plasma arc therethrough. The assembly also comprises a counter bore feature, disposed relative to the distal end the nozzle body, fluidly connected to the bore and located distally relative to the bore. At least one of the bore or the counter bore feature has a non-circular cross-sectional shape in a plane perpendicular to the longitudinal axis. The non-circular cross-sectional shape is configured to enable a second non-circular cross-sectional shape in the plasma arc that diffuses the plasma arc.