Galvanometer Scanner Alignment for Laser Welding Focal Position
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The focal position of a tool coordinate system in laser welding apparatuses can be displaced due to mechanical causes, and the displacement is not accurately compensated when set by teaching six points, affecting the precision of the welding process.
Innovation Solution
An adjustment assistance device is attached to the galvanometer scanner, featuring a light-receiving member with a mark to quantify the relative positional difference between the reference and actual light-receiving positions, and a control device that adjusts the tool coordinate system based on this quantification, ensuring accurate alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the tool coordinate system is set based on design values of the galvanometer scanner, then the setup process is simple, but the focal position may be displaced from the designed position due to mechanical causes
Solution Approach 1:
The patent replaces mechanical positioning methods with an optical measurement system. A light-receiving member with a mark is used to optically measure the actual focal position, and this information is fed back to adjust the tool coordinate system, substituting mechanical alignment with optical detection and computational adjustment
Solution Approach 2:
The patent implements a feedback mechanism where the actual focal position is measured using the light-receiving member and mark, this measured position is compared with the designed position, and the tool coordinate system is adjusted based on the detected deviation, creating a closed-loop adjustment system
2Manufacturing precision
If the tool coordinate system is set by teaching six points, then mechanical displacement can be compensated, but the process involves arm movement and is affected by operator skill level
Solution Approach 1:
The patent extracts the measurement function from the complex six-point teaching process. By separating the focal position measurement into a dedicated light-receiving member with a mark that can be directly imaged, it removes the need for operator-performed arm movements and multi-point teaching, simplifying the process while maintaining accuracy
Solution Approach 2:
The patent uses an imaging unit to create an optical copy or image of the light-receiving mark. This visual representation allows direct measurement and quantification of the focal position without physical arm movement, replacing the complex mechanical teaching process with a simplified optical imaging and measurement approach
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 solution allows for precise compensation of the focal position displacement, enhancing the accuracy and reliability of the laser welding process by quantifying and adjusting the relative positional difference, thereby improving the alignment of the tool coordinate system.
Implementation Method 1
a light-receiving member 101 having a light-receiving surface S, which is at least one flat surface... to quantify a relative positional difference between a reference light-receiving position P for light output from the laser output port 12 and an actual light-receiving position R at which the light output from the laser output port 12 is received
Data Source
AI summary
An adjustment assistance device is attached to a galvanometer scanner at a laser output side of the galvanometer scanner and used to adjust a tool coordinate system of the galvanometer scanner. The adjustment assistance device includes a light-receiving member having a light-receiving surface, which is at least one flat surface; and a connecting member that connects the light-receiving member to the galvanometer scanner and that enables the light-receiving surface to face a laser output port of the galvanometer scanner with a predetermined distance therebetween. The light-receiving member includes a light-receiving mark portion on the light-receiving surface, the light-receiving mark portion being a mark used to quantify a relative positional difference between a reference light-receiving position for light output from the laser output port and an actual light-receiving position at which the light output from the laser output port is received.