Laser Processing of Laminated Metal and Protection Layers
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Solution Overview
Problem
It is challenging to process a structure with a protection layer laminated on a metal layer using existing laser processing methods, as it is difficult to maintain the quality and precision of both layers while improving processing speed.
Innovation Solution
A laser processing method and apparatus that utilize a short-pulse laser to ablating both the protection layer and the metal layer, with the short-pulse laser processing step ablating the protection layer and the metal layer in a controlled manner to prevent adhesion of dross and cracks, allowing for high-precision processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional laser processing method is used on a laminated structure with a protection layer and metal layer, then the processing speed can be improved, but the quality of both layers deteriorates due to adhesion of dross and generation of cracks
Solution Approach 1:
The laser processing is divided into two distinct steps: first processing the protection layer with a first laser beam, then processing the metal layer with a second laser beam having a longer wavelength. This segmentation allows each layer to be processed with optimized parameters, preventing dross adhesion and crack generation while maintaining high processing speed
Solution Approach 2:
Different laser beams with different wavelengths are applied to different layers based on their specific material properties. The first laser beam is optimized for the protection layer while the second laser beam with longer wavelength is optimized for the metal layer, achieving high-quality processing of each layer with appropriate local processing conditions
2Manufacturing precision
If the laser beam is focused to process the protection layer, then the processing precision is improved, but the heat affects the metal layer causing quality deterioration
Solution Approach 1:
The wavelength parameter of the laser beam is changed between processing steps. A first laser beam with a specific wavelength is used for the protection layer to achieve precise processing, then a second laser beam with a longer wavelength is used for the metal layer. This parameter change allows precise processing of the protection layer while the longer wavelength of the second beam reduces harmful heat effects on the metal layer
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 reduces adhesion of dross and generation of cracks, enabling higher precision and faster processing of the metal layer by using a short-pulse laser for the protection layer and a fiber laser for the metal layer, maintaining the quality of both layers.
Implementation Method 1
a short-pulse laser processing step for irradiating the protection layer with the short-pulse laser and ablating the protection layer
Implementation Method 2
a metal layer processing step for ablating the metal layer
Data Source
AI summary
Provided is a laser processing method in which a laser processing head for irradiating, with at least a short-pulse laser, a processed article having a protection layer laminated to a metal layer is used to process the processed article, whereby high-quality, highly accurate processing is possible by means of a short-pulse laser processing step for irradiating the protection layer with the short-pulse laser and ablating the protection layer, and a metal layer processing step for ablating the metal layer in the area that was ablated during the short-pulse laser processing step.