Arc Welding Wire Feeding Control for Stability
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Solution Overview
Problem
Existing arc welding methods face issues with instability, leading to defective beads, increased spatters, and lack of penetration due to variations in welding speed and wire extension gaps, limiting the welding current range and imposing excessive loads on wire feeding motors and gears.
Innovation Solution
The method and apparatus dynamically adjust frequency and velocity amplitude of wire feeding in accordance with the welding current, using a sinusoidal or trapezoidal waveform to maintain optimal welding conditions, minimizing spatters and penetration issues while reducing motor and gear load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the frequency and velocity amplitude of wire feeding are increased to maintain welding stability at higher welding currents, then the welding current range can be extended, but the load on the wire feeding motor and gears increases excessively
Solution Approach 1:
The patent implements dynamic adjustment of wire feeding parameters by making the frequency and velocity amplitude variable according to the welding current. The control system continuously adapts the wire feeding rate based on real-time welding current conditions, allowing the system to operate efficiently across a broad welding current range without imposing excessive loads on the motor and gears at any given moment.
2Force
If the frequency and velocity amplitude of wire feeding are kept fixed, then the load on wire feeding motor and gears is reduced, but the welding operation is limited to a fixed welding current range
Solution Approach 1:
The patent changes the operational parameters (frequency and velocity amplitude) of the wire feeding system based on the welding current. By adjusting these parameters dynamically, the system maintains optimal performance across different welding current ranges while keeping the motor and gear loads within acceptable limits.
3Productivity
If the wire feeding rate is increased to improve welding speed, then productivity increases, but arc stability decreases leading to defective beads and increased spatters
Solution Approach 1:
The patent employs periodic modulation of the wire feeding rate with a sinusoidal or triangular waveform superimposed on the base feeding rate. This periodic action creates alternating short-circuit and arc states that stabilize the welding process, preventing defects and spatters while maintaining high welding speeds through optimized parameter selection.
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 approach allows for stable and efficient arc welding across a broader welding current range, reducing spatters and penetration problems, and extending the service life of wire feeding motors and gears by optimizing wire feeding parameters.
Implementation Method 1
arc welding in which a short circuit state and an arc generation state are alternately generated by changing the feeding direction of a welding wire as a consumable electrode periodically between the forward feeding and the reverse feeding
Data Source
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AI summary
The arc welding method of the present invention is a consumable electrode arc welding in which a welding wire feeding rate suitable for a welding current is determined as an average feeding rate, and the short circuit state and the arc generation state are alternately generated by changing the wire feeding periodically and repeatedly between the forward feeding and the reverse feeding. The method offers arc welding with the average feeding rate according to a welding current, a predetermined frequency, and a predetermined velocity amplitude. In the method, at least any one of the frequency and the velocity amplitude is set to a value suitable for the welding current.