Laser Head Radiation Locus Control for Curved Machining Accuracy
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Solution Overview
Problem
Existing laser machining systems experience degraded machining quality when the direction of the machining line relative to the workpiece changes, leading to varied machining widths and reduced accuracy.
Innovation Solution
The laser machining method involves adjusting the shape of the radiation locus to maintain a constant relative angle between the representative direction of the radiation locus and the movement direction of the head, prioritizing the motion of the head to change the radiation direction over the robot's posture, thereby minimizing vibration and maintaining machining quality even when the machining line is curved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the robot moves the head along a curved machining line, then the machining path can follow complex workpiece geometries, but the relative angle between the radiation locus and movement direction varies, degrading machining quality
Solution Approach 1:
The radiation locus is made dynamically adjustable to adapt its orientation based on the movement direction. The controller modifies the radiation locus orientation in real-time as the head moves along the machining line, ensuring the relative angle remains constant even when following curved paths, thus resolving the contradiction between path flexibility and machining quality
Solution Approach 2:
The orientation parameter of the radiation locus is changed dynamically according to the movement direction. By adjusting the radiation locus orientation parameter based on the head's movement direction, the system maintains a constant relative angle while following complex machining paths, thereby preserving machining quality across varying geometries
2Manufacturing precision
If the robot changes its posture to maintain head orientation, then the relative angle can be maintained, but vibration increases due to robot motion adjustments
Solution Approach 1:
The function of maintaining constant relative angle is extracted from the robot's posture control and assigned to the head's radiation locus orientation control. By separating this function from robot motion, the system avoids the vibration caused by robot posture adjustments while still maintaining angle consistency through head-only adjustments
Solution Approach 2:
The mechanical posture adjustment of the robot is replaced with an optical/orientation adjustment of the radiation locus. Instead of physically moving the robot to maintain angle, the system uses controller-based orientation adjustment of the radiation locus, eliminating mechanical vibration while achieving the same geometric result
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 ensures consistent machining quality and increased accuracy by maintaining a constant relative angle between the radiation direction and movement direction, even when the machining line direction changes, reducing vibration and improving precision.
Implementation Method 1
a laser machining method... a head (100) that performs laser machining
Data Source
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AI summary
A laser machining method uses a head and a robot. The head is configured to variably make a shape of a radiation locus using laser. The robot is configured to cause the head to move along a machining line. The laser machining method includes obtaining a movement direction in which the head is being moved by the robot. The radiation locus made by the head is adjusted to keep a constant relative angle between the movement direction obtained in the obtaining step and a representative angle of the shape of the radiation locus.