scholarly journals Laser Drilling Assisted with Jet Electrochemical Machining

Nd YAG Laser ◽  
10.5772/35289 ◽  
2012 ◽  
Author(s):  
Hua Zhang
Keyword(s):  
Electrochemical Machining ◽  
Laser Drilling ◽  
Jet Electrochemical Machining

Green Laser Drilling Assisted with Jet Electrochemical Machining of Nickel-Based Superalloy

2010 ◽  
Vol 426-427 ◽  
pp. 75-80 ◽  
Author(s):  
H. Zhang ◽  
Jia Wen Xu ◽  
J.M. Wang
Keyword(s):  
Electrochemical Machining ◽  
Frequency Doubling ◽  
Optical Microscope ◽  
Green Laser ◽  
Laser Drilling ◽  
Recast Layer ◽  
Ambient Atmosphere ◽  
Nickel Based Superalloy ◽  
Experimental Apparatus ◽  
Jet Electrochemical Machining

Laser drilling is extensively used in the aerospace and aircraft industries. The most important application is the drilling of fine cooling holes in aero turbine engine components such as nozzle guide vanes and blades. However, laser-drilled holes are typically associated with a number of inherent defects such as recast layer and spatter. In order to solve these problems, a novel hybrid process of laser drilling assisted with jet electrochemical machining (JECM-LD) has been developed to improve the overall quality of laser-drilled holes. The process based on the application of a jet electrolyte, being aligned coaxially with the focused laser beam, on the workpiece surface. The effects of the jet electrolyte during the process mostly consist of electro chemical reaction, effective cooling with materials and transporting debris. A pulsed Nd:YAG laser with frequency doubling is used in the JECM-LD experiments. On the basis of a measurement of laser attenuation in electrolyte, an experimental apparatus system is built and JECM-LD experiments are performed on 0.5mm thickness nickel-based superalloy sheets with the system. The optical microscope is used to detect the experimental results. It is found that the recast layer and spatter have been effectively removed during the JECM-LD compared with laser drilling in ambient atmosphere conditions. The efficiency of JECM-LD with millisecond green laser is about 70% of laser drilling in air.

Research on Hybrid Process of Laser Drilling With Jet Electrochemical Machining

2012 ◽  
Vol 134 (6) ◽  
Author(s):  
Lixin Yuan ◽  
Jiawen Xu ◽  
Jianshe Zhao ◽  
Hua Zhang
Keyword(s):  
Electrochemical Machining ◽  
Laser Drilling ◽  
Electrochemical Process ◽  
Recast Layer ◽  
Hybrid Process ◽  
Electrochemical Dissolution ◽  
Proper Distance ◽  
Metallurgical Defects ◽  
Jet Electrochemical Machining ◽  
Electrolyte Jet

The spatter and recast layer are main metallurgical defects in laser drilling (LD). Combining jet electrochemical process with laser can minimize such defects. The hybrid process is called electrolysis jet guided laser drilling (EJGLD). The presented experiment results show that the electrolyte jet can guide and transmit laser to the workpiece for drilling; and the electrochemical dissolution can effectively reduce spatter and recast layer. This paper introduces work on how to optimize this hybrid process, in particular, how to set a proper distance between the cathode and workpiece for best efficiency and accuracy.

Modelling and Experimental Investigation of Laser Assisted Jet Electrochemical Machining

CIRP Annals ◽  
2004 ◽  
Vol 53 (1) ◽  
pp. 179-182 ◽  
Author(s):  
A.K.M. DeSilva ◽  
P.T. Pajak ◽  
D.K. Harrison ◽  
J.A. McGeough
Keyword(s):  
Experimental Investigation ◽  
Electrochemical Machining ◽  
Jet Electrochemical Machining
Sign in / Sign up

Export Citation Format

Share Document