Dual Spindle Wire Feed With Independent Spool Braking
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Solution Overview
Problem
Existing wire drive systems for dual wire welding or additive manufacturing often result in both increased weld puddle width and length when using larger electrodes, leading to excessive energy consumption and non-ideal weld bead profiles, as they cannot independently control the angular velocities of separate wire spools.
Innovation Solution
A dual spindle wire drive system with separate friction brakes and biasing members allows for independent rotation of inner and outer spindles at different angular velocities, enabling precise control over wire feed and preventing free-wheeling during wire payout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a larger electrode diameter is used to increase weld puddle width and length, then the weld bead width and length are improved, but energy consumption increases and heat input increases
Solution Approach 1:
The system divides the single wire electrode into two separate wire electrodes, each with its own spool and drive mechanism. This segmentation allows independent control of each wire's feed rate and angular velocity, enabling precise control over weld puddle geometry without requiring a single large-diameter electrode that would consume more energy.
2Use of energy by moving object
If two wire electrodes are used to avoid increasing electrode diameter, then energy consumption is reduced, but control over angular velocities of spools becomes complex
Solution Approach 1:
The system employs a nested spindle configuration where an inner spindle is positioned within an outer spindle, both sharing a common axis. Each spindle has its own friction brake and biasing member, allowing independent angular velocity control while maintaining a compact, integrated structure. This nesting approach reduces overall device complexity compared to completely separate drive mechanisms.
Solution Approach 2:
The system uses dynamic friction brakes with biasing members that can independently adjust the rotational speed of each spindle. This dynamic control mechanism allows the spools to rotate at different angular velocities as needed, providing flexible wire feed control without requiring complex mechanical linkages or electronic control systems.
3Adaptability or versatility
If separate spools are used for dual wire welding, then wire feed flexibility is improved, but free-wheeling during wire payout may occur
Solution Approach 1:
Friction brakes serve as intermediary elements between the spindles and the wire payout system. These brakes provide controlled resistance to spool rotation, preventing free-wheeling during wire payout while allowing flexible wire feed control. The biasing members ensure consistent brake engagement, maintaining reliable wire delivery without sacrificing adaptability.
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
This solution enables efficient wire feeding with reduced energy consumption and improved weld bead profiles by allowing independent control of wire spool speeds, addressing the limitations of existing systems while maintaining synchronized wire delivery.
Implementation Method 1
A first friction brake is in contact with the inner spindle. A second friction brake is in contact with the outer spindle.
Implementation Method 2
A biasing member is located between the inner spindle and the outer spindle and applies a bias force from the outer spindle to the inner spindle to push the inner spindle against the first friction brake.
Data Source
AI summary
A welding or additive manufacturing wire drive system includes a shaft. An inner spindle is mounted on the shaft. The inner spindle has a first hub for receiving a first welding wire spool mounted on the inner spindle, and a first flange around the first hub. An outer spindle is mounted coaxially on the shaft with the inner spindle and includes a second hub for receiving a second welding wire spool mounted on the outer spindle, and a second flange around the second hub. A first friction brake is in contact with the inner spindle. A second friction brake is in contact with the outer spindle. A biasing member is located between the inner spindle and the outer spindle and applies a bias force from the outer spindle to the inner spindle to push the inner spindle against the first friction brake. The inner spindle and the outer spindle are configured for independent rotation at different angular velocities from each other.