Research on coupling technology for water-jet guided laser machining based on off-axis optical system

2018 ◽  
Vol 47 (12) ◽  
pp. 1206001
Author(s):  
孙 冬 Sun Dong ◽  
王军华 Wang Junhua ◽  
韩福柱 Han Fuzhu
Keyword(s):  
Optical System ◽  
Water Jet ◽  
Laser Machining

scholarly journals Study on the Influence of Surface Temperature Field of Aluminum Alloy Etched by Laser Water Jet Composite Machining

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3206
Author(s):  
Xuehui Chen ◽  
Xin Xu ◽  
Wei Liu ◽  
Lei Huang ◽  
Hao Li ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Temperature Field ◽  
Surface Temperature ◽  
Process Parameters ◽  
Water Jet ◽  
Laser Machining ◽  
Material Surface ◽  
Laser Etching ◽  
Surface Temperature Field

This paper studies the compound effect of liquid medium and laser on the workpiece and analyses the law of material surface temperature change during the processing. Taking 7075-T6 aluminum alloy as the research object, the surface temperature field of aluminum alloy processed using water-jet-assisted laser machining under different process parameters was simulated using finite element software. In addition, the temperature field of the material surface was detected in real-time using the self-built water-jet-assisted laser machining temperature field detection system, and the processing results were observed and verified using an optical microscope, scanning electron microscope, and energy spectrum analyzer. The results show that when the water jet inflow angle is 45°, the heat-affected area of the material surface is the smallest, and the cooling effect of the temperature field of the material surface is better. Considering the liquidus melting point of 7075 aluminum alloys, it is concluded that the processing effect is better when the water jet velocity is 14 m·s−1, the laser power is 100 W, and the laser scanning speed is 1.2 mm·s−1. At this time, the quality of the tank is relatively good, there are no cracks in the bottom of the tank, and there is less slag accumulation. Compared with anhydrous laser etching, water-jet-assisted laser etching can reduce the problems of micro-cracks, molten slag, and the formation of a recast layer in laser etching and improve the quality of the workpiece, and the composition of the bottom slag does not change. This study provides theoretical guidance and application support for the selection and optimization of process parameters for water-jet-assisted laser etching of aluminum alloy and further enriches the heat transfer mechanism of multi-field coupling in the process of water-jet-assisted laser machining.

A Simple Optical Coupling Method for Water-Jet Guided Laser Machining System

2014 ◽  
Vol 541-542 ◽  
pp. 774-779
Author(s):  
Meng Li ◽  
Wen Wu Zhang ◽  
Xi Ping Zhang ◽  
Tian Run Zhang
Keyword(s):  
Water Jet ◽  
Coupling Method ◽  
Laser Machining ◽  
Optical Coupling ◽  
Spot Pattern ◽  
Coupling Condition ◽  
Laser Focus ◽  
Machining System ◽  
Coupling Parameters ◽  
Pattern Shape

In this paper a simple optical coupling method for water-jet guided laser machining system is introduced and its characteristics are studied. By the introduced method the output spot pattern behind the water-jet was observed instead of the laser focus. In order to acquire the pattern a piece of glass was used to block the water-jet but let the laser through, and a light screen was placed behind the glass in a certain distance to display the pattern image. Since the image scale could be adjusted by changing the distance between the glass and the light screen, the CCD magnifying system was no longer needed. It is found that the pattern varied while the coupling condition changed. Only in small chance the pattern was a tiny spot but more commonly it was in a ring-like shape which could be easily recognized. So such ring-like patterns could be signals for optical coupling guidance. Furthermore a series of study to analyze the correlation between the pattern shape and coupling parameters was carried out by simulation with the help of Zemax.

Experimental Study on Water-Jet Guided Laser Machining Magnesium Alloy

2012 ◽  
Vol 723 ◽  
pp. 476-480
Author(s):  
Chun Qi Li ◽  
Li Jun Yang ◽  
Yang Wang
Keyword(s):  
Experimental Study ◽  
Magnesium Alloy ◽  
Laser Processing ◽  
Alloy Sheet ◽  
Water Jet ◽  
Laser Machining ◽  
Heat Damage ◽  
Cutting Experiments ◽  
Morphology Characteristics ◽  
Conventional Laser

Drilling and cutting experiments in magnesium alloy sheet were conducted using water-jet guided laser. Morphology characteristics in processing areas were analyzed and compared with that of the conventional laser processing. The results show the processing areas are clean, with almost no molten residues attached and negligible heat damage in water-jet guided laser processing. The hole walls and cut surfaces are smooth and have some degree of slope, and are completely covered with dense protruding particles at microcosmic scale. However, with conventional laser, the processed areas are attached with a large number of residues, and obvious secondary solidified layers.

scholarly journals Surface integrity of water jet guided laser machining of CFRP

Procedia CIRP ◽  
2018 ◽  
Vol 71 ◽  
pp. 71-74 ◽  
Author(s):  
Dong Sun ◽  
Fuzhu Han ◽  
Weisheng Ying ◽  
Chaolong Jin
Keyword(s):  
Surface Integrity ◽  
Water Jet ◽  
Laser Machining

Numerical and Experimental Research on Water-Jet Guided Laser Micromachining

2009 ◽  
Vol 626-627 ◽  
pp. 297-302
Author(s):  
Li Jun Yang ◽  
Mao Lu Wang ◽  
Yang Wang ◽  
J. Tang ◽  
Yan Bin Chen
Keyword(s):  
Thermal Effects ◽  
Laser Micromachining ◽  
Paper Analysis ◽  
Water Jet ◽  
Laser Machining ◽  
Action Mechanism ◽  
New Development ◽  
Simulation Results ◽  
Plasma Shock Wave ◽  
Plasma Shock

Water-jet guided laser micromachining is the new development of laser machining. This paper analysis the action mechanism of the plasma shock wave and hollow erode effects in water-jet guided laser machining processing, on the base of the thermal effects of the laser and water-jet. And the numerical model on the action effects between the water-jet guided laser and the material was founded. Using the software ANSYS, the processing of the water-jet guided laser micromachining was simulated. This paper gave the investigation on the distributing of temperature field in processing of water-jet guided laser micromachining. And the results of the correlative experiment correspond with the simulation results.

Compact optical system for pulse-to-pulse laser beam quality measurement and applications in laser machining

2004 ◽  
Vol 43 (26) ◽  
pp. 5037 ◽  
Author(s):  
Robert W. Lambert ◽  
Rodolpho Cortés-Martínez ◽  
Andrew J. Waddie ◽  
Jonathan D. Shephard ◽  
Mohammad R. Taghizadeh ◽  
...  
Keyword(s):  
Laser Beam ◽  
Pulse Laser ◽  
Optical System ◽  
Beam Quality ◽  
Quality Measurement ◽  
Laser Machining ◽  
Pulse Laser Beam ◽  
Laser Beam Quality

Numerical Simulation on the Temperature Field of Water-Jet Guided Laser Micromachining

2009 ◽  
Vol 69-70 ◽  
pp. 333-337 ◽  
Author(s):  
Li Jun Yang ◽  
M.L. Wang ◽  
Yang Wang ◽  
J. Tang ◽  
Yan Bin Chen
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Numerical Model ◽  
Theoretical Foundation ◽  
Laser Micromachining ◽  
Water Jet ◽  
Laser Machining ◽  
New Development ◽  
Set Up ◽  
Development Orientation

Water-jet guided laser micromachining is the new development orientation of laser machining. This paper set up the numerical model on the action between the water-jet guided laser and the material. By using the software ANSYS, simulated the processing of the water-jet guided laser micromachining. This paper gave the investigation on the machining laws and the distributing of temperature fielding in processing of water-jet guided laser micromachining. And the results of the correlative experiment prove the model aright. The result provided the theoretical foundation for the next research on the water-jet guided laser machining.

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