Laser Focus Vibration for Low-Carbide Cutting Quality
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Solution Overview
Problem
Laser cutting apparatuses cause thermal damage and generate a large amount of carbide when using a fixed focal point, compromising the suitability of the cut components.
Innovation Solution
A laser cutting apparatus that continuously changes the focal point of the laser beam using a vibration module driven by a piezoelectric module and a motor module, combined with a reflective and concentrating module to control the beam's direction and focus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a laser beam with a fixed focal point is used to cut a target, then the cutting process is simple and stable, but thermal damage accumulates and generates a large amount of carbide near the cut
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed focal point into a moving focal point. The vibration module vibrates the lens module in the optical axis direction, causing the focal point to move dynamically along the cutting direction. This dynamic focal point movement prevents thermal energy from accumulating at a single location, thereby reducing carbide generation and improving cut quality while maintaining cutting effectiveness.
2Manufacturing precision
If a vibration module is added to change the focal point position, then carbide generation is reduced and cut quality improves, but the device complexity increases
Solution Approach 1:
The patent applies the merging principle by integrating the vibration function directly into the existing optical system. The vibration module is coupled to the lens module, and together they form an integrated optical vibration assembly. This merging approach allows the focal point to move without requiring a completely separate complex vibration mechanism, thereby improving cut quality while minimizing the increase in device complexity.
3Object-generated harmful factors
If the focal point is continuously changed by vibration, then thermal damage is reduced, but the stability of the cutting process decreases
Solution Approach 1:
The patent applies the periodic action principle by using controlled vibrations at specific frequencies. The vibration module oscillates the lens module sinusoidally in the optical axis direction, creating a periodic movement of the focal point. This periodic action ensures that thermal energy is distributed in a controlled manner along the cutting path, reducing thermal damage while maintaining sufficient process stability through frequency 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
Reduces the generation of carbide at the cut surface by varying the focal point position, improving the quality of the cut components.
Implementation Method 1
The piezoelectric module may be repeatedly expanded and contracted in a first direction when an electrical signal is applied thereto
Implementation Method 2
The reflective module may include a reflective surface configured to reflect the laser beam in such a way that a traveling direction of the laser beam is changed
Implementation Method 3
The concentrating module may be configured to concentrate the laser beam in such a way that energy of the laser beam reflected by the reflective surface is concentrated at a focal point
Implementation Method 4
A laser cutting apparatus operates by focusing a laser on the target, causing sufficient heat to melt or vaporize a small portion of the target material near the focal point of the laser beam
Data Source
AI summary
A laser cutting apparatus includes a laser module, a vibration module, a motor module, a reflective module, and a concentrating module. The vibration module includes a lens module, and a piezoelectric module coupled to the lens module and configured to repeatedly expand and contract. The motor module is configured to move the vibration module in by transmitting power to the vibration module. The reflective module is configured to reflect the laser beam in such a way that a traveling direction of the laser beam is changed. The concentrating module is configured to concentrate the laser beam in such a way that energy of the laser beam reflected by the reflective surface is concentrated at a focal point.