Adaptive Laser Engraving Path Control for Accurate Cavities
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Solution Overview
Problem
Existing laser machining methods for engraving textures or cavities on workpieces suffer from inaccuracies in depth and planarity due to layer-by-layer machining, with no real-time adjustment capabilities to correct errors during the process.
Innovation Solution
A method for laser machining that involves calculating an initial machining path based on workpiece geometry and texture, adjusting the path in real-time by scanning and measuring the machined surface, and recalculating the path to correct deviations, allowing for adaptive machining to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the machining path is fixed and predetermined, then the machining process is simple and fast, but the ability to correct errors in real-time is lost
Solution Approach 1:
The patent transforms the static, predetermined machining path into a dynamic adaptive process. The machining parameters and path are no longer fixed but are continuously adjusted based on real-time measurements of the actual machined surface. The control unit dynamically modifies machining parameters for subsequent layers based on measured topology deviations, enabling the system to adapt to actual machining conditions while maintaining high productivity through automated real-time adjustments.
2Manufacturing precision
If real-time measurement and path adjustment is implemented, then machining accuracy is improved, but the machining time increases due to additional measurement and recalculation steps
Solution Approach 1:
The patent implements periodic measurement and adjustment cycles during the machining process rather than continuous operation. The machining process proceeds in layers with measurements taken at predetermined intervals (e.g., after completing certain layers or at specific depth milestones). This periodic approach allows the system to maintain accuracy through regular corrections while minimizing the time lost to measurement and recalculation operations by not performing them continuously.
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
Enables precise engraving of textures and cavities with improved geometrical accuracy by compensating for errors during the machining process, ensuring the final surface topology matches the target specification.
Implementation Method 1
Laser ablation methods are widely used for engraving a texture on the surface of a physical object by sublimating the material on the surface of the object
Implementation Method 2
scanning a defined machined area on the surface of the workpiece by a measuring device to obtain the machined depths at a plurality of positions on the machined area
Data Source
AI summary
A laser machining method for engraving a texture or a cavity on a workpiece by a machine tool, wherein the machine tool includes a machine table for mounting the workpiece thereon and a laser head for emitting a laser beam on the workpiece, wherein the laser beam is directed by a laser galvo scanner integrated in the laser head to reach a defined position on the workpiece, wherein the machine tool further comprises a control unit configured to control the movement of the laser head and the laser galvo scanner.