Laser Head Radiation Locus Control for Curved-Line Machining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional laser machining methods experience degradation in machining quality due to changes in the direction of the machining line, leading to varied machining widths and reduced accuracy, especially when the machining line is curved.
Innovation Solution
A laser machining method that adjusts the radiation locus to maintain a constant relative angle between the movement direction and the representative direction of the radiation locus, prioritizing the motion of the head to change the representative direction over the robot's posture change, thereby minimizing vibration and maintaining machining quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the robot moves the head along a curved machining line, then the head can access different positions on the workpiece, but the machining width varies and machining quality degrades due to changes in the relative angle between movement direction and radiation locus
Solution Approach 1:
The radiation locus is dynamically adjusted in real-time based on the head's movement direction. The control system calculates the movement direction from position information and actively changes the radiation locus orientation to maintain a constant relative angle, transforming a static radiation pattern into a dynamic one that adapts to curved path requirements
Solution Approach 2:
The orientation parameter of the radiation locus is continuously modified according to the movement direction. By changing the angular parameter of the radiation locus to match the tangent of the machining path, the system maintains consistent machining width across straight and curved segments
2Adaptability or versatility
If the robot changes its posture to follow a curved machining line, then the head can reach curved positions, but vibration increases and machining accuracy decreases
Solution Approach 1:
The orientation adjustment function is extracted from the robot's mechanical posture control and transferred to the radiation locus control system. Instead of using robot joint movements to achieve orientation changes, the patent separates these functions: the robot provides position while the radiation locus provides orientation, eliminating the need for complex robot posture adjustments that cause vibration
Solution Approach 2:
The mechanical solution of changing robot posture to achieve orientation is replaced with an optical/control solution. The radiation locus orientation is adjusted through control signals rather than mechanical robot arm repositioning, reducing mechanical vibration and improving machining stability
3Device complexity
If the radiation locus orientation is fixed relative to the head, then the system is simple to control, but machining quality degrades when the movement direction changes
Solution Approach 1:
The control system uses position feedback from the robot's current location to calculate movement direction and adjust radiation locus orientation in real-time. This closed-loop feedback mechanism maintains constant relative angle between movement direction and radiation locus, ensuring consistent machining quality without requiring complex open-loop control
Data Source
AI summary
A laser machining method includes obtaining a movement direction in which a head that variably makes a shape of a radiation locus using a laser is being moved by a robot that causes the head to move along a machining line, and adjusting the radiation locus made by the head to keep a constant relative angle between the movement direction obtained by the obtaining and a representative angle of the shape of the radiation locus.