Wire Feed Limiter Slip Clutch Prevents Bird's Nest
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Overfeeding of wire in welding and cladding applications can lead to wire buckling, coiling, and the formation of 'bird's nests, as well as burnback issues where the wire sticks to the welding contact tip, causing quality and operational problems.
Innovation Solution
Incorporation of a torque limiter or slip clutch mechanism in wire feeders that reduces or stops wire feeding when resistance exceeds a threshold, preventing coiling and bunching by allowing the wire to momentarily stop or slow, ensuring it softens before resuming feeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If wire feeding is restricted near the weld area to prevent overfeeding, then wire quality and welding precision are improved, but wire feeding reliability deteriorates causing buckling and bird's nest formation
Solution Approach 1:
The wire feeder transitions from static constant-speed feeding to dynamic variable-speed feeding. The controller adjusts the drive wheel speed in real-time based on feedback from the wire feeding resistance sensor, allowing the system to adapt to changing welding conditions and prevent both overfeeding and bird's nest formation
Solution Approach 2:
A feedback control system is implemented using a wire feeding resistance sensor that continuously monitors the resistance during wire feeding. The controller processes this feedback signal and adjusts the drive wheel speed accordingly, creating a closed-loop control system that maintains optimal wire feeding conditions
2Productivity
If wire feeding speed is increased to improve productivity, then welding efficiency is improved, but wire overfeeding and burnback occur
Solution Approach 1:
The wire feeding resistance sensor provides continuous feedback on wire feeding conditions. When resistance exceeds a threshold indicating potential burnback or overfeeding, the controller automatically reduces wire feeding speed, preventing harmful effects while maintaining high productivity during normal operation
Solution Approach 2:
The system dynamically adjusts wire feeding speed based on real-time conditions rather than operating at constant high speed. This allows the system to maintain high productivity during stable welding while automatically slowing down when resistance changes indicate potential problems
3Manufacturing precision
If torque limiter mechanism is added to prevent overfeeding, then wire feeding precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical torque limiting mechanisms with an electronic control system. The controller receives electrical signals from the wire feeding resistance sensor and electronically adjusts the drive wheel motor speed, eliminating the need for mechanical slip clutches or torque limiters while achieving the same precision control goal
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
Prevents wire coiling and bunching, reducing the occurrence of 'bird's nests and burnback, thereby maintaining wire quality and stability during metalworking processes.
Implementation Method 1
a torque limiter or slip clutch mechanism in wire feeders that reduces or stops wire feeding when resistance exceeds a threshold
Implementation Method 2
a metal filler wire is resistively heated, typically, to a softened/plastic/semi-liquidus state, usually by passing an electrical current through it
Implementation Method 3
heating power (e.g., electrical current applied through the wire, which has some resistance) is applied to the wire
Data Source
AI summary
A wire conveying mechanism, preferably for a welding, cladding or additive manufacturing apparatus, with a slip clutch mechanism connectable to a motor.