Laser Processing Device High Speed Vibration Unit
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Solution Overview
Problem
Conventional laser processing devices are limited in processing depth due to slow adjustment of the focusing point, leading to incomplete processing, material hardening, and the 'crater phenomenon, which affects product quality and increases processing time.
Innovation Solution
A laser processing device equipped with a high-speed vibration unit that periodically moves the focusing point along the workpiece's surface, allowing for efficient processing at multiple depths by maintaining the laser beam's maximum energy concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the focusing point is adjusted by moving the focusing lens vertically, then the processing depth can be changed, but the adjustment speed is slow and prolongs the total processing period
Solution Approach 1:
The patent applies mechanical vibration to the focusing lens through a vibration unit, causing the lens to oscillate at high frequency along the optical axis. This vibration enables the focusing point to rapidly scan through different depths, achieving fast depth adjustment without slow mechanical positioning. The vibration frequency and amplitude are controlled to optimize both processing speed and depth coverage.
Solution Approach 2:
The vibration unit generates periodic oscillation of the focusing lens, creating a time-varying focusing point position that periodically scans through the workpiece depth. This periodic action allows the laser to efficiently process multiple depth layers within each vibration cycle, significantly increasing productivity compared to sequential depth adjustment.
2Productivity
If the focusing point adjustment is slow, then the total processing period is prolonged, but fast adjustment requires high-speed vibration mechanism
Solution Approach 1:
A dedicated vibration unit is integrated into the focusing lens assembly to generate controlled mechanical oscillations. This unit includes a vibration generator coupled to the lens, enabling precise control of vibration amplitude and frequency. The mechanical vibration approach provides rapid focusing point adjustment while maintaining manageable system complexity through targeted component addition.
3Manufacturing precision
If the laser beam energy is concentrated at a single focusing point, then precise processing is achieved, but the processing depth is limited by the focusing point position
Solution Approach 1:
The vibration unit causes the focusing lens to oscillate along the optical axis, making the focusing point dynamically scan through a range of depths while maintaining energy concentration at each instantaneous position. This enables the laser to process workpiece layers at multiple depths sequentially within each vibration cycle, effectively extending the processing depth range while preserving precision at each depth level.
Solution Approach 2:
The patent transforms the static focusing point into a dynamic one by applying vibration to the focusing lens. The focusing point position becomes time-dependent, continuously varying through different depths during vibration. This dynamic approach allows the concentrated laser energy to access multiple depth layers, overcoming the depth limitation of fixed focusing while maintaining precision through controlled energy concentration at each momentary focus position.
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 solution enhances processing speed and quality by preventing material hardening and reducing the 'crater phenomenon, thereby increasing production rate and product quality.
Implementation Method 1
the high speed vibration unit is capable of vibrating periodically along a direction parallel to the moving path of the laser beam such that the focusing point of the laser beam moves periodically on the workpiece at high speed
Implementation Method 2
The lenses refract and focus the laser beam at a focus point for processing a workpiece
Data Source
AI summary
A laser processing device has a laser source and a high speed vibration unit. The laser source has a laser-emitting end being capable of emitting a laser beam adapted to process a workpiece. The high speed vibration unit is located on a moving path of the laser beam and is capable of vibrating periodically along a direction parallel to the moving path of the laser beam such that the focusing point of the laser beam moves periodically on the workpiece at high speed. The laser processing device with the fast moving focusing point is able to efficiently process parts of the workpiece at specific depths. Therefore, product quality and production rate are increased.