Laser-assisted hybrid processes: A review

Lee, Choon-Man; Woo, Wan-Sik; Kim, Dong‐Hyeon; Oh, Won-Jung; Oh, Nam-Seok

doi:10.1007/s12541-016-0034-8

Cited by 37 publications

(13 citation statements)

References 97 publications

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“…Quality of hole in laser drilling is largely dependent upon the operating parameters, such as laser beam wavelength, pulse repetition rate, intensity, pulse duration and operational current, etc and their combinations thereof. In general, the cracks, debris, major tapering effect, HAZ, shapes defects, are the main concerns [8][9][10][11]. Therefore, laser drilling has extensively studied theoretically and experimentally.…”

Section: Introductionmentioning

confidence: 99%

Effect of defocused plane on entrance and exit hole geometry of high grade steel 18CrNi8 during percussion drilling by Nd:YAG millisecond laser system

Nawaz

Kashif

Abbas

et al. 2020

Mater. Res. Express

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Modern manufacturing industries prefer laser drilling processes owing to the adequate controlled drilling in comparison with existing alternatives. The presented experimental study mainly accounts defocusing impact along with other technical parameters and optimization of Nd:YAG millisecond pulsed laser drilling; and finally their influence on the entrance and exit holes profile. The key technical parameters such as pulse frequency, pulse width and assisting gas pressure with respect to different defocused focal plane are explored experimentally for the percussion laser drilling of high grade steel 18CrNi8. Experiment results revealed that increase in defocusing distance has caused an increment in hole entrance diameter; however, with different defocusing distance, the entrance diameter increasing rate keep changing. Different trends of increasing and decreasing diameter at entrance and exit are recorded and investigated with respect to work-piece defocusing positions. The defocusing variation of laser beam has been investigated with the hole profile, changing from straight hole to tapered blind hole. Which leads to conclusive and optimized results for obtaining optimal hole profile (at entrance and exit). The optimum parametric combinations for attaining lower heat treatment effects are also discussed for superior hole quality.

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Section: Introductionmentioning

confidence: 99%

Effect of defocused plane on entrance and exit hole geometry of high grade steel 18CrNi8 during percussion drilling by Nd:YAG millisecond laser system

Nawaz

Kashif

Abbas

et al. 2020

Mater. Res. Express

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“…Conventional machining processes such as turning, drilling and milling have achieved a dominant position in the aerospace and automotive industries, as they contribute to the rendering of a large variety of necessary features on mechanical components with sufficient efficiency. Although these processes were proven effective for the commonly used engineering materials, the rise of utilization of various hard-to-cut materials such as steel, titanium Witold Habrat habrat@prz.edu.pl alloys, nickel superalloys, ceramics or metal matrix composites in the aforementioned industries due to their superior mechanical properties, wear and corrosion resistance, has posed new difficulties such as increased tool wear, which require more advanced methods in order to be overcome [19,37,38]. Furthermore, the limitations on, feed and cutting speed, related to conventional machining of hard-to-cut materials reduce the productivity and profit in industrial practice.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the limitations on, feed and cutting speed, related to conventional machining of hard-to-cut materials reduce the productivity and profit in industrial practice. In order to improve machining of difficult-to-cut materials, assistance of conventional machining processes by non-conventional technologies was proposed, in the form of energy-assisted hybrid machining processes such as vibration-assisted machining (VAM), thermal-assisted machining (TAM) or magnetic-assisted machining (MAM), among others [19,37,43].…”

Section: Introductionmentioning

confidence: 99%

Thermo-mechanical aspects of cutting forces and tool wear in the laser-assisted turning of Ti-6Al-4V titanium alloy using AlTiN coated cutting tools

Habrat

Krupa

Markopoulos

et al. 2020

Int J Adv Manuf Technol

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Machining of hard-to-cut materials with conventional processes is still considered as a challenge, as the special properties of these materials often lead to rapid tool wear and reduced surface integrity. For that reason, it is preferable to combine conventional machining processes with other technologies in order to overcome the problems of machining these materials. In the present work, laser-assisted turning experiments on a Ti-6Al-4V workpiece were conducted using AlTiN coated cutting tools in order to investigate the effect of laser heating on cutting forces, cutting temperature, tool wear and microstructure alterations. Two series of experiments were performed under varying cutting speed, laser spot diameter and workpiece diameter values; the first series involved only laser heating of the workpiece and the second both laser heating and cutting. The findings revealed the effect of process parameters on cutting forces and temperature determining the importance of workpiece diameter size, indicated the formation of martensite phase at the top of the heat-affected zone of the workpiece and also showed that high temperatures can lead to intensive tool wear, instead of having a beneficial effect for the cutting tool. Finally, finite element (FE) simulations were carried out in order to study the time evolution of the temperature field and calculate the heating and cooling rates during the process. From the FE results, relatively high heating and cooling rates were observed for smaller workpiece diameters and lower cutting speed, whereas the high magnitude of these rates justified the creation of the martensite phase through a diffusionless transformation.

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“…6 The most widely used methods for case-integrated mobile device antennas are the double injection molding process, 8 PDS (Printing Direct Structure), 9,10 DPA (Direct Printing Antenna), 11,12 and LPS (Laser Plating Structuring). [13][14][15] These manufacturing technologies use different materials and have advantages and disadvantages. Although they facilitate the production of ultrathin, high-performance, multiband, and wideband antennas, the manufacturing costs are higher than those corresponding to existing manufacturing techniques, and reliability issues, such as the adhesion force under high temperature and high humidity, still exist.…”

Section: Introductionmentioning

confidence: 99%

The manufacturing of a surface anchor structure for the electroless plating of a three-dimensional antenna integrated with a mobile device case

Jang

Kang

Seo

et al. 2020

Advances in Mechanical Engineering

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This study proposes a method to improve the manufacturing process of a surface anchor structure for the injection molding along with bonding properties of the plating layer for antennas, which can be applied to the Laser Direct Plating (LDP) process for the production of a three-dimensional antenna integrated with a mobile device case. By adjusting parameters such as the output of the laser processing, scanning speed, and pulse recurrence frequency, a micro anchor structure was developed on the surface of the injection mold. The measurement of the surface roughness using a 3D surface profiler showed that the roughness improved by approximately 3.6 times, from 0.96 to 3.24 µm. In addition, the zigzag arrangement of the micro anchor structure was improved by 1.2 times compared to the even arrangement. Furthermore, if the micro anchor structure contained a wall after laser processing, the bonding strength of the plating solution was 69%; with no wall, it was 94% or higher. Thus, the existence of walls resulted in a difference of 1.4 times in the bonding strength. The laser processing improved the bonding strength of the plating solution on the micro anchor structure by approximately 19 times.

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Laser-assisted hybrid processes: A review

Cited by 37 publications

References 97 publications

Effect of defocused plane on entrance and exit hole geometry of high grade steel 18CrNi8 during percussion drilling by Nd:YAG millisecond laser system

Effect of defocused plane on entrance and exit hole geometry of high grade steel 18CrNi8 during percussion drilling by Nd:YAG millisecond laser system

Thermo-mechanical aspects of cutting forces and tool wear in the laser-assisted turning of Ti-6Al-4V titanium alloy using AlTiN coated cutting tools

The manufacturing of a surface anchor structure for the electroless plating of a three-dimensional antenna integrated with a mobile device case

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