Laser Beam Deflection Control for Moving Workpiece Precision
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Solution Overview
Problem
Inaccuracies and spatial deviations occur during the processing of workpieces using electromagnetic processing radiations, such as laser radiation, due to fluctuations in transport speed and movements of the workpiece on the transport device.
Innovation Solution
A method and device that acquire correction data using optical sensors while the workpiece is being processed, allowing for real-time adjustments in processing time and optical deflection of the radiation to maintain precision despite unsteady transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the workpiece is moved by the transport device during processing, then productivity is improved through in-line processing, but manufacturing precision deteriorates due to transport speed fluctuations and workpiece movements
Solution Approach 1:
The patent implements a feedback mechanism where optical sensors continuously detect the actual position and movement of the workpiece during transport. This real-time information is fed back to the control device, which adjusts the processing parameters (laser position, processing time) to compensate for transport variations, thereby maintaining manufacturing precision while enabling continuous in-line processing
Solution Approach 2:
The system performs preliminary detection of workpiece characteristics (such as leading edge position, workpiece dimensions) before the actual processing begins. This preliminary information is used to pre-calculate and set the appropriate processing parameters, ensuring that even with transport movements, the processing will be accurately positioned when it occurs
2Manufacturing precision
If the workpiece is detected before processing, then manufacturing precision is improved by identifying workpiece position, but reliability deteriorates because detection occurs before transport variations are known
Solution Approach 1:
The system uses continuous feedback from optical sensors during transport to update the workpiece position information. Rather than relying solely on pre-processing detection, the system continuously monitors workpiece position throughout transport and uses this updated information to adjust processing parameters in real-time, ensuring both precision and reliability
Solution Approach 2:
The system transitions from static pre-processing detection to dynamic continuous detection during transport. The optical sensors continuously track workpiece position and movement, allowing the system to adapt to transport variations dynamically, thereby improving the reliability of processing consistency
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
The method and device enable precise alignment and processing of workpieces, reducing inaccuracies and spatial deviations by using real-time correction data to adjust processing parameters.
Implementation Method 1
correction data of the workpiece are acquired by means of at least one optical sensor while the workpiece is being processed
Implementation Method 2
the formation of a structure might comprise a modification of the workpiece by means of processing radiation and/or a removal of material, in particular ablation, by means of processing radiation
Implementation Method 3
Laser radiation is typically used as processing radiation
Implementation Method 4
the location of processing the workpiece by means of processing radiation is controlled by means of a control device-controlled optical deflection unit for processing radiation
Data Source
AI summary
A device and a method for forming a structure on a workpiece by processing radiation while the workpiece is moved by a transport device, in which correction data of the workpiece are acquired by optical sensors. The correction data includes movement data of the workpiece and/or position data of a structure created on the workpiece by the processing radiation, and, dependent on the correction data, the deflection of processing radiation brought about by a deflection unit is determined, in particular corrected.