Push-Pull Wire Feed Control for Stable Welding Wire Tension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing welding systems face challenges in maintaining optimal wire tension, leading to issues such as wire shaving, buckling, and increased power requirements, which affect the longevity of consumables and the ergonomics of the welding torch.
Innovation Solution
The system virtually couples the push motor and pull motor to maintain a target wire tension, mimicking a virtual tuned spring that reacts to disturbances, thereby controlling the wire tension effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wire tension is increased to prevent wire buckling and maintain feeding stability, then wire feeding reliability is improved, but wire shaving occurs on edges which reduces consumable life
Solution Approach 1:
The system dynamically adjusts wire tension parameters through coordinated control of push and pull motors, maintaining tension within an optimal range that prevents both buckling and shaving. The control system modifies tension parameters in real-time based on feedback from motor currents and wire feed velocity, resolving the contradiction between preventing buckling and avoiding consumable wear.
2Reliability
If wire tension is increased to prevent wire buckling, then wire feeding stability is improved, but power consumption increases requiring a larger torch
Solution Approach 1:
The system optimizes power consumption by dynamically adjusting wire tension parameters through coordinated push-pull motor control. Rather than maintaining constantly high tension, the system adjusts tension to match actual wire feed conditions, reducing unnecessary power consumption while maintaining feeding stability. The control algorithm balances motor currents to achieve stable wire feed with minimal energy expenditure.
3Use of energy by moving object
If wire tension is decreased to reduce power consumption and improve ergonomics, then power requirements are reduced, but wire may buckle resulting in wasted time clearing tangled wire
Solution Approach 1:
The control system prevents wire buckling and subsequent time loss by dynamically adjusting tension parameters through coordinated push-pull motor control. The system maintains minimum necessary tension to prevent buckling while avoiding excessive tension that would increase power consumption. Real-time monitoring of motor currents and wire feed velocity allows the system to adjust parameters proactively, preventing bird's nest formation and eliminating time loss from wire clearing.
4Reliability
If wire tension is increased to maintain wire under tension, then wire feeding control is improved, but friction in the liner increases which requires more power
Solution Approach 1:
The system reduces liner friction and associated power consumption by dynamically adjusting wire tension through coordinated push-pull motor control. Rather than maintaining high static tension, the system adjusts tension parameters to match actual wire feed conditions, minimizing frictional losses in the liner while maintaining adequate wire control. The control algorithm optimizes the balance between tension for control and tension to minimize friction.
Data Source
AI summary
An example welding wire feeder includes: a push motor configured to feed welding wire from a wire source; a first sensor configured to provide push motor velocity feedback; and control circuitry configured to control the push motor and a pull motor of a welding torch coupled to the welding wire feeder by: controlling a push motor velocity of the push motor and a pull motor velocity of the pull motor based on a target wire feed speed; and compensating each of the push motor velocity of the push motor and the pull motor velocity of the pull motor based on the push motor velocity feedback and based on pull motor velocity feedback, wherein the push motor velocity and the pull motor velocity are based on a target wire tension.