Laser Machining Device Spiral Path Energy Control
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Solution Overview
Problem
Existing laser machining methods for producing cutting edges and surfaces on workpieces lack precision and efficiency in energy distribution, leading to suboptimal material ablation profiles and surface quality.
Innovation Solution
A method and device that utilize a pulsed laser beam deflected by a control unit along a spiral path within a hatched area on the workpiece, allowing for adjustable line spacing and other spiral path parameters to customize energy input, enabling precise control over material ablation profiles and surface finishes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional laser beam pulsing is used for material ablation, then material removal is achieved, but the energy distribution is insufficiently precise leading to suboptimal surface quality
Solution Approach 1:
The hatched area is divided into multiple spiral paths, and each spiral path is further segmented into discrete points of impingement. This segmentation allows independent control of energy input at different locations, enabling precise energy distribution across the workpiece surface while maintaining high manufacturing precision.
Solution Approach 2:
The deflecting device dynamically adjusts the point of impingement of the laser beam along spiral paths within the hatched area. This dynamic movement pattern, controlled by the control unit, enables continuous optimization of energy distribution precision throughout the machining process, improving both surface quality and energy utilization efficiency.
2Manufacturing precision
If conventional hatched area machining is used, then material ablation is achieved, but the ablation profile is suboptimal due to lack of energy input control
Solution Approach 1:
The control unit modifies spiral path parameters including line spacing, spiral radius, and number of convolutions to precisely control energy input distribution. By varying these parameters, the system achieves precise control over ablation profile characteristics while managing device complexity through systematic parameter optimization.
Solution Approach 2:
The control unit monitors and adjusts spiral path parameters based on machining conditions to optimize energy input control. This feedback mechanism enables precise control of ablation profiles by continuously adapting the deflecting device's movement pattern along spiral paths, balancing precision requirements with operational complexity.
3Manufacturing precision
If uniform energy input is applied across the hatched area, then material ablation occurs, but surface roughness remains high due to insufficient energy distribution control
Solution Approach 1:
Different regions within the hatched area receive different energy inputs through the spiral path configuration. The line spacing and spiral parameters are optimized for local requirements, with tighter spacing in regions requiring finer surface finish and wider spacing where material removal speed is prioritized. This local quality approach simultaneously reduces surface roughness and maintains high material ablation rates.
Solution Approach 2:
The laser beam follows periodic spiral paths across the hatched area, creating overlapping patterns that ensure uniform yet controlled energy distribution. This periodic action with varying line spacing allows the system to achieve both high material ablation rates through efficient coverage and low surface roughness through repeated passes with optimized energy input at each location.
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 allows for high manufacturing precision, achieving both high material ablation rates and low surface roughness, with the ability to set energy input accurately, resulting in improved quality of machined products such as cutting tools.
Implementation Method 1
The laser beam pulses are directed within a pulse or hatched area at the workpiece surface and impinge on the workpiece there. At the point of impingement of the laser beam pulse, material is ablated from the workpiece.
Implementation Method 2
Provided in the optical path of the laser beam, there is a deflecting device that can be activated by a control unit. The laser light emitted by the laser and impinging in the deflecting device is deflected into at least two spatial directions
Data Source
AI summary
The invention relates to a method and a laser machining device 10 for machining a workpiece 13. The laser machining device 10 has a laser 11 for generating a laser beam 12, which is deflected by way of a deflecting device 15 in accordance with a pattern defined by a control unit 14 and is directed onto a workpiece surface 17 of a workpiece 13, which surface is to be machined. The point of impingement 18 of the deflected laser beam 12b on the workpiece surface 17 is guided along at least one spiral path within a circular hatched area 16. The spiral path 19 is characterized by spiral path parameters. One spiral path parameter is the line spacing a between neighboring points of intersection P of the spiral path 19 with an axis running through the center point M of the spiral path 19.