Dual Wire Contact Tip for Weld Bead Width and Heat Input
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Solution Overview
Problem
Existing welding methods face challenges in achieving an elongated weld puddle or widened weld bead without increasing electrode diameter, which leads to excessive heat input and suboptimal weld profiles.
Innovation Solution
A dual wire configuration contact tip that facilitates the formation of a bridge droplet between two electrodes before deposition, allowing for controlled weld puddle formation with reduced heat input and improved weld geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If electrode diameter is increased to widen weld bead and elongate weld puddle, then weld bead width and weld puddle length are improved, but heat input increases and energy consumption increases
Solution Approach 1:
The single electrode is segmented into multiple smaller electrodes (first wire electrode and second wire electrode). This segmentation allows the weld bead width to be increased by using multiple electrodes spaced apart, while each electrode maintains a smaller diameter that requires less heat input, thus resolving the contradiction between weld bead width and heat input
Solution Approach 2:
The invention transitions from a single-electrode configuration to a multi-electrode spatial arrangement. By positioning multiple electrodes at specific distances from each other, the weld bead width is increased through dimensional expansion rather than increasing individual electrode diameter, thereby reducing the heat input required per electrode
2Length of stationary object
If electrode diameter is increased to elongate weld puddle, then weld puddle length is improved, but heat input increases
Solution Approach 1:
The welding process is segmented into multiple electrode interactions. The first wire electrode and second wire electrode create separate molten pools that merge to form an elongated weld puddle. This segmentation allows the weld puddle length to be extended through the combined effect of multiple electrodes rather than using a single large electrode that would require excessive heat input
3Productivity
If larger electrode is used to increase wire deposition rate, then deposition rate is improved, but heat input increases
Solution Approach 1:
The wire deposition process is segmented across multiple electrodes. The first wire electrode and second wire electrode each contribute to the overall deposition rate, allowing the total deposition rate to be increased while maintaining smaller electrode diameters that require less heat input per electrode, thus resolving the contradiction between productivity and energy consumption
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 dual wire configuration enables wider and longer weld beads with improved mechanical performance and deposition rates, while minimizing heat input and maintaining weld stability.
Implementation Method 1
The first and second exit orifices are separated from each other by a distance configured to facilitate formation of a bridge droplet between a first wire electrode delivered through the first bore and a second wire electrode delivered through the second bore
Data Source
Figure 1
Figure 2~3A
Figure 3B~3C
AI summary
A welding or additive manufacturing contact tip (200, 700) includes an electrically-conductive body extending from a proximal end of the body to a distal end of the body. The body forms a first bore terminating at a first exit orifice (701, 702) at a distal end face of the body, and a second bore terminating at a second exit orifice (701, 702) at the distal end face of the body. The first and second exit orifices (701, 702) are separated from each other by a distance configured to facilitate formation of a bridge droplet between a first wire electrode (E1, E2) delivered through the first bore and a second wire electrode (E1, E2) delivered through the second bore during a deposition operation.