A study on the effect of ultrasonic vibration in nanosecond laser machining

Kang, Bongchul; Kim, Gun Woo; Yang, Minyang; Cho, Sung-Hak; Park, Jong Kweon

doi:10.1016/j.optlaseng.2012.06.013

Cited by 43 publications

(15 citation statements)

References 27 publications

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“…Fig.15. shows that a deeper hole with good surface finish can be generated by vibration assisted laser machining with same energy density as that of conventional machining [26]. Fig.15.…”

Section: Vibration Assisted Laser Machiningmentioning

confidence: 92%

“…Vibration assisted laser machining is an effective method to release the local energy concentration because high frequency repetitive motion distributes spatially concentrated energy uniformly, which further improve surface finish, reduced surface oxidation [26,27] and increased aspect ratio of machined features [25]. Fig.15.…”

Section: Vibration Assisted Laser Machiningmentioning

confidence: 99%

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Vibration Assisted Conventional and Advanced Machining: A Review

Maroju

Subbu

Krishna

et al. 2014

Procedia Engineering

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Increasing demand for precision miniaturised components made of hard and brittle materials can no longer meet the requirements by conventional machining and advanced machining processes. To facilitate high precision machining, vibration is introduced in any of workpiece, tool and working medium, which is called Vibration Assisted Machining (VAM). In this review, the advancements of VAM in conventional machining as well as in advanced machining are presented. In detail, general overview, classifications, basic kinematics of 1-D and 2-D VAM, chip formation and instrumental implementation issues of VAM, are discussed. In addition to this the reasons for improvements in machining process and promising areas to be explored in VAM are summarized.

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“…Fig.15. shows that a deeper hole with good surface finish can be generated by vibration assisted laser machining with same energy density as that of conventional machining [26]. Fig.15.…”

Section: Vibration Assisted Laser Machiningmentioning

confidence: 92%

Section: Vibration Assisted Laser Machiningmentioning

confidence: 99%

Vibration Assisted Conventional and Advanced Machining: A Review

Maroju

Subbu

Krishna

et al. 2014

Procedia Engineering

View full text Add to dashboard Cite

show abstract

“…[28][29][30][31][32][33][34][35][36][37][38][39][82][83][84][85][86][87][88][89][90][91] The University of Edinburgh, Glasgow Caledonian University, and Philips Dap BV reported hybrid systems that combine focused laser beams for drilling and a jet electrolyte for machining together, as shown in Fig. 8.…”

Section: Subtractive/assistivementioning

confidence: 99%

“…10. 38 Another similar approach was taken by KIMM, The University of Science and Technology, and Pusan National University. 39 Ultrafast laser machining was developed by vibrating the optical objective lens.…”

mentioning

confidence: 99%

Hybrid manufacturing in micro/nano scale: A Review

Chu

Kim

Lee

et al. 2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

156

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In this paper, a total of 57 micro and nano scale hybrid manufacturing processes are reviewed. These processes are categorized in terms of process timing and process type. Process timing is one of the most important aspects of manufacturing, and three different process schemes -concurrent, main/assistive (M/S) separate, and main/main (M/M) separate -are considered. The process type is categorized as either geometrically additive or subtractive, and all hybrid processes are categorized into combinations of additive, subtractive, and assistive process. Features and advantages are described for each of these classifications. Machining is found to be the most common process for both micro and nano-scale hybrid manufacturing. Of micro scale hybrid manufacturing schemes, 74.4% use assistive processes as a secondary process because the main purpose of most micro scale hybrid manufacturing is to improve the quality of the process. In nano scale manufacturing, 61.5% of hybrid manufacturing schemes employ assistive processes, since these processes typically focus on the fabrication of parts that are difficult to fabricate using a single, existing process. Based on a summary of published work, future trends in hybrid manufacturing at the micro and nano scale are suggested.

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“…through the use of picosecond or femtosecond laser [7], the introduction of specific medium (e.g., ultrasonic vibration [8], underwater working environment [9] ), as well as post-processing techniques [10]. Femtosecond laser ablation has been advocated as an appropriate method of choice in laser micro-machining owing to the removal of materials through vaporization, as a result the defects caused by the thermal effects can largely be avoided [11,12].…”

Section: Introductionmentioning

confidence: 99%

An investigation on the hole quality during picosecond laser helical drilling of stainless steel 304

Zhang

Zhou

et al. 2015

Appl. Phys. A

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Precision drilling with ultra-short pulse lasers (e.g., picosecond and femtosecond) has been advocated to significantly improve the quality of the micro-holes with reduced recast layer thickness and no heat-affected zone. However, a combination of high-power picosecond laser with helical drilling strategy in laser drilling has rarely been reported in previous studies. In the present study, a series of micro-holes with circular, triangular, rectangular, and rhombic shapes (diameter 0.6 mm) were manufactured on stainless steel 304 using a newly developed laser drilling system which incorporated a picosecond laser and a high-speed laser beam rotation apparatus into a five-axis positioning platform. The quality of the helical drilled holes, e.g., recast layer, micro-crack, circularity, and conicity, were evaluated using an optical microscope, an optical interferometer, and a scanning electron microscope. In addition, the microstructure of the samples was investigated following etching treatment. It was demonstrated that the entrance ends, the exit ends, and the side walls of the micro-holes were quite smooth without accumulation of spattering material and formation of recast layer and micro-crack. No tapering phenomenon was observed, and the circularity of the holes was fairly good. There was no distinctive difference with regard to the microstructure between the edges of the holes and the bulk material. Picosecond laser helical drilling can be an effective technique for manufacturing of micro-holes with very high quality. The development of high-power picosecond laser would promote picosecond laser drilling to be more industrial relevance in the future.

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A study on the effect of ultrasonic vibration in nanosecond laser machining

Cited by 43 publications

References 27 publications

Vibration Assisted Conventional and Advanced Machining: A Review

Vibration Assisted Conventional and Advanced Machining: A Review

Hybrid manufacturing in micro/nano scale: A Review

An investigation on the hole quality during picosecond laser helical drilling of stainless steel 304

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