Research on the Mechanism of Micro-Water Jet-Guided Laser Precision Drilling in Metal Sheet

Qiao, Hongchao; Zhao, Jibin; Cao, Zheng

doi:10.3390/mi12030343

Cited by 15 publications

(6 citation statements)

References 12 publications

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“…Therefore, a higher laser pulse frequency makes the material absorb less laser energy per unit time, causing shallower cutting depth. This is the same as the research results of Z et al [ 27 ].…”

Section: Resultssupporting

confidence: 90%

Modeling and Prediction of Water-Jet-Guided Laser Cutting Depth for Inconel 718 Material Using Response Surface Methodology

Zhao

et al. 2023

Micromachines

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In this study, the water-jet-guided laser (WJGL) method was used to cut Inconel 718 alloy with high temperature resistance. The effect of critical parameters of the water-jet-guided laser machining method on the cutting depth was studied by a Taguchi orthogonal experiment. Furthermore, the mathematical prediction model of cutting depth was established by the response surface method (RSM). The validation experiments showed that the mathematical model had a high predictive ability for cutting depth. The optimal cutting depth was obtained by model prediction, and the error was 5.5% compared with the experimental results. Compared with the traditional dry laser cutting, the water conducting laser method reduced the thermal damage and improved the cutting quality. This study provides a reference for the precision machining of Inconel 718 with a water-jet-guided laser.

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Section: Resultssupporting

confidence: 90%

Modeling and Prediction of Water-Jet-Guided Laser Cutting Depth for Inconel 718 Material Using Response Surface Methodology

Zhao

et al. 2023

Micromachines

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“…The Nusselt number is used to judge the intensity of convective heat transfer. According to the literature [ 27 ], the Nusselt number of the circular cross-section nozzle is

Here,

…”

Section: Laser–water Composite Machining Model and Theoretical Analysismentioning

confidence: 99%

Effects of Laser Machining Aluminum Alloy in Different Media

Huang

Tang

et al. 2022

Micromachines

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To study the effects of aluminum alloys processed by a laser in air and water and at different water velocities, corresponding experiments were conducted and the impacting effects of different water velocities on the surface of the workpiece were simulated, respectively. The results show that when laser processing aluminum alloy materials in air, there is more slag and a recondensation layer on both sides of the groove, the heat-affected zone is larger and the surface processing quality is poor. When laser processing aluminum alloy materials in water, the processing quality is improved. With the increase in water velocity, the impacting and cooling effect is enhanced, the groove depth and groove width show a trend of first increasing and then decreasing, the slag and recondensation layer on both sides of the groove are reduced, the heat-affected zone is reduced and the processing quality of the groove is improved. When the water velocity reaches 30 m/s, a better groove can be obtained. Laser processing aluminum alloy materials in water can obtain better processing quality than laser processing in air.

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“…The study also demonstrates the machinability di culties of the Ti alloys. To investigate the parametric effect e.g., assistant pressure, laser power, and focal length, on dimensional accuracy, Muthuramalingam et al [30] carried out laser drilling on Ti6Al4V by implementing the design of experiment (DoE) based Taguchi approach by considering four different parameters at four different levels. The study suggests that laser power and assistant pressure are important parameters for determining the dimensional accuracy of the laser beam drilling process.…”

Section: Introductionmentioning

confidence: 99%

Influence of parameters on performance characteristics and defects during laser microdrilling of titanium alloys using RSM

Chatterjee,

Mahapatra,

et al. 2023

Int J Adv Manuf Technol

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Titanium (Ti) and its alloys have received signi cant attention in recent years, particularly for applications in the medical science, automobile, and aerospace sectors. Drilling is used for around 40 percent to 60 percent of an aeronautical product's material removal processes. Non-conventional machining can be considered to obtain an optimal quality of drilled holes. The present study has employed a pulsed Nd:YAG laser having 250 W average power to perform the micro-drilling on titanium alloy of 0.45 mm thick sheet. The study focuses on determining the impact of laser parameters (gas pressure (4 ~ 8 bar), laser input current (200 ~ 260 A), pulse width (4 ~ 8 ms), and pulse repetition rate (1 ~ 7 Hz)) on performance characteristics during micro drilling on a thin foil of titanium alloy having 0.45 mm thickness. To evaluate the quality of micro-drilled holes, aspects, e.g., circularity, spatter area, and taper, have been considered. The response surface methodology based on the design of experiment technique was employed to estimate the in uence of parameters on performance characteristics with the least number of experiments. The study indicates that assistant gas pressure, pulse width, and laser input current are the essential parameters in taper formation and spatter deposition. The study suggests that the increase in pulse repetition rate and pulse width improves the circularity of the hole. The electron micrography of the drilled holes helps to determine the development of the heat-affected zone (HAZ) and micro-crack near drilled holes. The presented research provides a new understanding of how the process parameters contribute to HAZ development, crack occurrence and intensity.

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Research on the Mechanism of Micro-Water Jet-Guided Laser Precision Drilling in Metal Sheet

Cited by 15 publications

References 12 publications

Modeling and Prediction of Water-Jet-Guided Laser Cutting Depth for Inconel 718 Material Using Response Surface Methodology

Modeling and Prediction of Water-Jet-Guided Laser Cutting Depth for Inconel 718 Material Using Response Surface Methodology

Effects of Laser Machining Aluminum Alloy in Different Media

Influence of parameters on performance characteristics and defects during laser microdrilling of titanium alloys using RSM

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