A simple optical coupling method for water-jet guided laser machining system

2013 ◽  
Author(s):  
Meng Li ◽  
Wenwu Zhang ◽  
Xiping Zhang ◽  
Tianrun Zhang
Keyword(s):  
Water Jet ◽  
Coupling Method ◽  
Laser Machining ◽  
Optical Coupling ◽  
Machining System

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.

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.

Intelligent laser machining system for multi-function processing of superhard materials

2021 ◽  
Author(s):  
Yong Wang ◽  
Wei Wang ◽  
Dongbin Zhang ◽  
Xiaolin Tian ◽  
Jiaojiao Qu ◽  
...  
Keyword(s):  
Laser Machining ◽  
Superhard Materials ◽  
Machining System

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

Study on Pre-Mixed Micro Abrasive Water Jet Machining System

2014 ◽  
Vol 618 ◽  
pp. 475-479 ◽  
Author(s):  
Zeng Wen Liu ◽  
R.Y. Liu
Keyword(s):  
Silicon Nitride ◽  
Brittle Materials ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Abrasive Water Jet Machining ◽  
System A ◽  
Machining System

This paper conducts a study on a pre-mixed micro abrasive water jet machining system. A new kind of abrasive mixing tank and the jet system are designed and tapped for the pre-mixed micro abrasive water jet machining system. The performances of the pre-mixed micro AWJ machining system are tested, and some polishing experiments are conducted for hard-brittle materials such as silicon nitride. The results show the feasibility and the advantage of the pre-mixed micro abrasive water jet machining system for polishing hard-brittle materials.

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