Laser Beam Phase Control for Precise Moving Workpiece Machining
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Solution Overview
Problem
Existing machining systems for laser machining of workpieces lack the ability to dynamically adjust beam parameters in real-time based on the position, orientation, and movement status of the workpiece, leading to inefficiencies and potential damage.
Innovation Solution
A machining system that includes a laser beam source providing coherent laser beams, a phase adjustment unit for adjusting phase differences, an amplifier for amplifying the beams, a processing optic for combining and focusing the beams, a feed unit for controlling the workpiece's position and orientation, a detection unit for determining the feed unit's status, and a control unit that adjusts the phase differences based on the feed unit's status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If beam parameters are fixed in conventional laser machining systems, then the system structure is simple, but the machining precision and quality deteriorate when workpiece position or orientation changes
Solution Approach 1:
The patent implements dynamic adjustment of beam parameters (intensity, polarization, spatial shape) in real-time based on workpiece position, orientation, and movement status. The control unit receives feedback from detection units and dynamically modifies laser beam characteristics through adjustable optical elements, transforming the static beam delivery system into a dynamic one that adapts to changing machining conditions.
Solution Approach 2:
The system incorporates detection units that monitor workpiece position, orientation, and movement status, feeding this information back to the control unit. The control unit processes this feedback and adjusts beam parameters accordingly, creating a closed-loop control system that maintains machining precision despite variations in workpiece positioning or motion.
2Productivity
If real-time beam parameter adjustment is implemented, then machining efficiency improves for varying workpiece positions, but the device complexity increases
Solution Approach 1:
The control unit serves multiple functions: it receives and processes signals from various detection units, calculates optimal beam parameters based on workpiece status, and controls multiple beam delivery channels simultaneously. This multi-functional control architecture enables the system to handle diverse machining scenarios (different positions, orientations, and movement statuses) with a single integrated unit, improving productivity without proportionally increasing complexity.
Solution Approach 2:
Real-time feedback from detection units enables the system to automatically adapt beam parameters during machining operations, maintaining optimal machining efficiency regardless of workpiece position or motion changes. This closed-loop control eliminates the need for manual intervention or multiple separate control systems, achieving high productivity through intelligent automation.
3Power
If multiple coherent laser beams are combined with phase adjustment, then beam intensity and machining capability improve, but system complexity and phase control difficulty increase
Solution Approach 1:
The system uses detection units to monitor the actual position, orientation, and movement status of the workpiece, providing feedback to the control unit. The control unit calculates the required phase adjustments for each laser beam based on this feedback, enabling coherent combination of multiple beams with appropriate phase relationships to achieve high intensity at the focal point while maintaining control through a unified control algorithm.
Solution Approach 2:
The system dynamically adjusts phase parameters of multiple laser beams based on real-time workpiece status. By changing phase parameters in coordination with position and orientation adjustments, the system maintains coherent beam combination and high intensity delivery to the workpiece surface, overcoming the complexity of phase control through parameter coupling and integrated control.
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 dynamic adjustment of beam parameters such as intensity, polarization, and spatial shape in real-time, allowing for precise and efficient laser machining of workpieces with varying positions, orientations, and movement statuses.
Implementation Method 1
a phase adjustment unit for adjusting a respective phase difference between the coherent laser beams
Implementation Method 2
an amplifier for amplifying the coherent laser beams to form respective amplified coherent laser beams
Implementation Method 3
a processing optic for combining the amplified coherent laser beams to form at least one machining laser beam
Data Source
AI summary
A machining system for laser machining a workpiece includes a laser beam source for providing a plurality of coherent laser beams, a phase adjustment unit for adjusting a respective phase difference between the plurality of coherent laser beams, an amplifier for amplifying the plurality of coherent laser beams to form respective amplified coherent laser beams, a processing optic for combining the amplified coherent laser beams to form a machining laser beam and for applying the workpiece with the machining laser beam, a feed unit for controlling a position and/or an orientation and/or a movement status of the workpiece relative to the machining laser beam, a detection unit for determining a status of the feed unit, and a control unit configured to control the phase adjustment unit according to the status of the feed unit as determined by the detection unit.