Laser Machining Gas Flow for Dust Evacuation on Precision Parts
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Solution Overview
Problem
Current laser machining technologies face challenges in efficiently managing dust during the production of high-precision parts, particularly when the risk of contamination by dust is high, as the dust produced can stick to the material surface due to temperature viscosity, leading to contamination issues.
Innovation Solution
A method and system for managing dust during laser machining that involves a laser machining device with a work support, optical system, gas generation, and directional gas flow to create a suction effect, effectively evacuating dust away from the workpiece using a gas flow directed overhanging the machining support, ensuring rapid and effective dust removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If laser machining is performed on high-precision parts, then manufacturing precision is improved, but dust contamination increases due to material sticking to the surface
Solution Approach 1:
A gas flow is directed towards the area overhanging the machining support before and during laser machining to create a suction effect that prevents dust from adhering to the workpiece surface. This preliminary protective action eliminates dust contamination issues that would otherwise compromise manufacturing precision
Solution Approach 2:
A gas flow acts as an intermediary between the laser machining process and the workpiece surface. The gas creates a protective atmosphere and suction effect that prevents direct contact between dust particles and the workpiece, thereby eliminating contamination while maintaining high-precision machining capabilities
2Reliability
If conventional dust collection equipment is used, then dust recovery is achieved, but dust evacuation speed is insufficient due to material viscosity and temperature
Solution Approach 1:
The gas flow system is dynamically directed towards the area overhanging the machining support, creating a moving suction effect that adapts to the machining process. This dynamic approach significantly increases dust evacuation speed by continuously removing dust particles before they can adhere to the workpiece, overcoming the limitations of conventional static dust collection equipment
Solution Approach 2:
A gas flow is utilized to create a suction effect for dust evacuation. By directing gas towards the area overhanging the machining support, the system leverages pneumatic principles to rapidly remove dust particles, achieving high-speed dust evacuation that overcomes the adverse effects of material viscosity and temperature
3Manufacturing precision
If laser beam focuses on a small portion to generate high energy, then machining precision is improved, but dust production increases due to localized heating
Solution Approach 1:
The harmful dust particles generated by localized laser heating are extracted from the machining zone by directing a gas flow towards the area overhanging the machining support. This extraction process removes dust before it can contaminate the workpiece, allowing high-energy focused laser machining to proceed without compromising precision due to dust adhesion
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 allows for rapid and effective evacuation of dust from the machining area, reducing the risk of contamination and enabling the production of high-precision parts that were previously impossible due to excessive dust contamination, such as medical devices and microprocessors.
Implementation Method 1
directing means for directing the flow of gas towards an area overhanging the machining support, along a main trajectory characterized, above the machining support, by a vector partially directed from the lower end towards the upper end to create a suction effect capable of driving a gas away from the machining support
Data Source
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AI summary
The invention concerns a laser machining device comprising, in particular, means configured to generate and direct a gas stream to an area lying above a machining support in such a way as to create a suction effect capable of entraining machining dust away from said machining support. The method according to the invention consists essentially in a process extending the practical application of the abovementioned laser machining device.