Push-Pull Welding Wire Feed Control for Bird-Nesting Prevention
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Solution Overview
Problem
Conventional welding wire feeding systems require empirical settings and constant calibration to prevent bird-nesting or shaving, especially when handling aluminum wire, and often necessitate specialized equipment, which is inconvenient and inefficient.
Innovation Solution
A push-pull wire feeding system with a push motor and a pull motor, where the control circuitry monitors current and speed using sensors to maintain a fixed operating speed and torque, eliminating the need for empirical settings and calibration by actively controlling the motors to prevent excessive tension and compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wire feeding systems use multiple motors without active control, then the system structure is simple, but bird-nesting or shaving occurs due to uncoordinated motor operation
Solution Approach 1:
The patent implements a control system with sensors that detect wire feed rate and motor parameters, feeding this information back to the controller. The controller adjusts motor operation based on this feedback to maintain coordinated push-pull motor operation, preventing bird-nesting and shaving while ensuring consistent wire feeding.
2Ease of operation
If empirical settings and calibration are used to coordinate motors, then specialized equipment is avoided, but constant calibration is required to maintain proper operation
Solution Approach 1:
The control system automatically coordinates the push and pull motors by detecting wire feed rate and motor parameters through sensors. The system self-adjusts motor operation without requiring manual calibration or empirical settings, eliminating the time loss associated with constant calibration while maintaining ease of operation.
3Productivity
If push motor speed is increased to feed wire faster, then productivity improves, but excessive tension causes shaving of the wire
Solution Approach 1:
The control system uses sensors to detect wire feed rate and motor parameters in real-time. When the push motor speed is increased to improve productivity, the feedback mechanism allows the controller to adjust the pull motor operation accordingly, maintaining proper tension and preventing wire shaving while achieving higher feed rates.
Solution Approach 2:
The system dynamically coordinates the operation of push and pull motors based on real-time conditions. As productivity requirements change and wire feed rate increases, the control system dynamically adjusts motor speeds and torques to maintain optimal tension, preventing shaving while achieving the desired productivity level.
4Reliability
If pull motor torque is increased to prevent bird-nesting, then wire feeding reliability improves, but excessive compression causes the wire to buckle
Solution Approach 1:
The control system detects wire feed rate and motor parameters through sensors and uses this feedback to precisely control pull motor torque. This prevents both bird-nesting and wire buckling by maintaining optimal torque levels that ensure reliable wire feeding without excessive compression.
Data Source
AI summary
A system for controlling multiple wire feed motors for use in a welding-type system including a push motor controlled to operate at a target wire feed speed and a pull motor disposed in a welding torch controlled to apply a target torque to the fed welding wire. Such a system eliminates shaving and bird nesting of welding wire.