Laser Welding Nozzle Timing for Stable Shield Gas Feed
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing laser welding devices face inefficiencies and excessive shield gas consumption due to unstable gas feeding rates during the movement of the laser processing head to the welding position, leading to poor weld quality.
Innovation Solution
A laser welding device with a control system that calculates the travel time and stabilizes the shield gas feeding rate by starting gas emission at a predetermined point before reaching the welding position, ensuring stable gas supply when the laser processing head arrives, thereby optimizing gas usage and weld quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If shield gas is emitted from the beginning of movement to stabilize feeding rate, then weld quality is improved, but shield gas consumption increases
Solution Approach 1:
The control device calculates the travel time from the reference position to the starting position and initiates shield gas emission at a precisely calculated timing before the laser processing head reaches the starting position. This preliminary action ensures the gas feeding rate is stabilized by the time welding begins, while avoiding unnecessary early emission that would waste gas.
Solution Approach 2:
The control device uses feedback from the calculated travel time and predetermined stability time to determine the optimal gas emission start timing. This closed-loop control ensures gas emission begins at the precise moment needed to stabilize flow rate before welding, optimizing both weld quality and gas consumption efficiency.
2Stability of the object's composition
If shield gas emission starts at reference position, then feeding rate stability is achieved, but welding effectiveness decreases
Solution Approach 1:
The system performs preliminary calculation of travel time and determines the precise moment when gas emission should start to achieve stabilization exactly at the starting position. This eliminates unnecessary early gas emission during the movement phase, improving welding effectiveness while maintaining feeding rate stability when needed.
3Loss of substance
If laser processing head moves to starting position while gas is already stable, then gas consumption is reduced, but arrival timing precision is required
Solution Approach 1:
The control device performs preliminary calculation of the travel time from reference position to starting position before movement begins. Based on this pre-calculated time and the predetermined stability time, it determines the exact emission start timing, ensuring the laser processing head arrives at the starting position with stabilized gas feeding rate.
Solution Approach 2:
The system uses feedback from travel time measurements and stability time data to continuously optimize the gas emission timing. This ensures precise coordination between head movement and gas emission start, achieving both reduced gas consumption and accurate arrival timing.
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 reduces wasted shield gas consumption and enhances the efficiency and quality of laser welding by stabilizing the gas feeding rate just as the processing head reaches the welding position, allowing for improved weld bead appearances and increased operational efficiency.
Implementation Method 1
a laser oscillator generating a laser beam to be radiated onto the workpiece through the laser nozzle
Data Source
AI summary
A laser welding method is constituted of: emitting shield gas in advance through a laser nozzle provided on a laser processing head at a time of moving the laser processing head from a reference position to a starting position for welding the workpiece; and radiating laser light onto the workpiece through the laser nozzle at the starting position for welding when a feeding rate of the shield gas gets stabilized, whereby performing laser welding on the workpiece.