Study on laser-assisted dry micro-ground surface of difficult-to-cut materials

Hu, Manfeng; Xie, Jianhe; Su, Honghua; Liu, J. N.

doi:10.1007/s00170-017-1093-4

Cited by 11 publications

(4 citation statements)

References 20 publications

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“…When an abrasive slurry jet was applied to machine the quartz, a large wavy pattern was observed and the material removal rate decreased [ 14 ]. Microedge cracks and burrs were noticed when a laser-assisted dry microgrinding process was applied [ 15 ]. Burrs can be reduced using laser-assisted dry microgrinding machining processes but the heat affected zone (HAZ) across the surface is a challenge [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Machining Performance of the TW-ECDM Process Using Magnetohydrodynamics (MHD) on Quartz Material

et al. 2021

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Many microslits are typically manufactured on quartz substrates and are used to improve their industrial performance. The fabrication of microslits on quartz is difficult and expensive to achieve using recent traditional machining processes due to its hardness, electrically insulating nature, and brittleness. The key objective of the current study was to demonstrate the fabrication of microslits on quartz material through a magnetohydrodynamics (MHD)-assisted traveling wire-electrochemical discharge micromachining process. Hydrogen gas bubbles were concentrated around the entire wire surface during electrolysis. This led to a less active dynamic region of the wire electrode, which decreased the adequacy of the electrolysis process and the machining effectiveness. The test results affirmed that the MHD convection approach evacuated the gas bubbles more rapidly and improved the void fraction in the gas bubble scattering layer. Furthermore, the improvements in the material removal rate and length of the cut were 85.28% and 48.86%, respectively, and the surface roughness was reduced by 30.39% using the MHD approach. A crossover methodology with a Taguchi design and ANOVA was utilized to study the machining performance. This exploratory investigation gives an unused strategy that shows a few advantages over the traditional TW-ECDM process.

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Section: Introductionmentioning

confidence: 99%

Improvement of the Machining Performance of the TW-ECDM Process Using Magnetohydrodynamics (MHD) on Quartz Material

et al. 2021

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“…Due to its high glass-transition temperature and brittle fracture, it is difficult to precisely process a glass microlens [9]. Glass microgrooves are fabricated by using ion etching [10], ultrafast laser pulses [11], and micromilling technology [12].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study on Hot-Embossing of Glass-Microprism Array without Online Cooling Process

Xie

et al. 2020

Micromachines

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Optical glass-microprism arrays are generally embossed at high temperatures, so an online cooling process is needed to remove thermal stress, but this make the cycle long and its equipment expensive. Therefore, the hot-embossing of a glass-microprism array at a low strain rate with reasonable embossing parameters was studied, aiming at reducing thermal stress and realizing its rapid microforming without online cooling process. First, the flow-field, strain-rate, and deformation behavior of glass microforming were simulated. Then, the low-cost microforming control device was designed, and the silicon carbide (SiC) die-core microgroove array was microground by the grinding-wheel microtip. Lastly, the effect of the process parameters on forming rate was studied. Results showed that the appropriate embossing parameters led to a low strain rate; then, the trapezoidal glass-microprism array could be formed without an online cooling process. The standard deviation of the theoretical and experimental forming rates was only 7%, and forming rate increased with increasing embossing temperature, embossing force, and holding duration, but cracks and adhesion occurred at a high embossing temperature and embossing force. The highest experimental forming rate reached 66.56% with embossing temperature of 630 °C, embossing force of 0.335 N, and holding duration of 12 min.

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“…Along with the development of science and technology, in order to prolong life people pay more and more attention to the research and development of life science, and actively explore the mysteries of life, study the origin and development of organism, biological tissue chemistry and physics and the relationship between structure and function of each organ, the mechanism of the metabolism of living organisms and the artificial life and artificial substitute organs, through the development of new drugs or change the dosage form to improve the efficacy of... Biomedical materials is the newest branch of biomedical science [1][2][3]. It is a frontier subject formed by the intersection of biology, medicine, chemistry, physics and materials science.…”

Section: Introductionmentioning

confidence: 99%

“…After the laser was born, the research on laser processing was carried out rapidly. Compared with the traditional machining, the advantages of laser machining include non-contact, high precision, high speed, etc., and the maintenance cost and process difficulty are far less than focusing ion beam and other processing methods, so that laser is widely used in industrial production nowadays [1] . Along with the processing range, the processing results are more and more demanding, and the research on laser processing is more and more thorough, one of which is the choice of light source.…”

Section: Introductionmentioning

confidence: 99%

Study on Micromachining of Femtosecond Laser Biomedical Polymer Materials

Fang

Qiao

Zhang

et al. 2020

KEM

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Femtosecond laser micromachining is a hot topic in the field of micromachining. Femtosecond laser processing of biomacromolecular micro devices has a promising application prospect. The research content of this paper is femtosecond laser micromachining of biomacromolecule materials, aiming at exploring the mechanism of femtosecond laser micromachining. In this paper, the principle of the interaction between laser and polymer materials is briefly expounded, and the photophysical processes such as transition, energy conversion, energy transfer and electron transfer are explained from the molecular orbital, and the mechanism is classified as photothermal and photochemical action, which is manifested as accelerating material's relaxation transformation process and degradation process. The interaction between polymer materials and laser starts from molecules absorbing the energy of photons to complete the transition from ground state to excited state. Different modes of excitation state inactivation correspond to the conversion of light energy into light energy, heat energy or chemical energy. On the one hand, the thermal action leads to the viscoelastic transformation of the material, and the material deforms or flows under the thermoelastic action; on the other hand, the thermal action accelerates the degradation reaction of the polymer material. The carbonyl group on the molecular chain of PMMA and PLA is more likely to reach the excited state, and the chemical properties of the carbonyl excited state determine that the photochemical processes of PMMA and PLA concentrate on the carbonyl group.

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Study on laser-assisted dry micro-ground surface of difficult-to-cut materials

Cited by 11 publications

References 20 publications

Improvement of the Machining Performance of the TW-ECDM Process Using Magnetohydrodynamics (MHD) on Quartz Material

Improvement of the Machining Performance of the TW-ECDM Process Using Magnetohydrodynamics (MHD) on Quartz Material

Theoretical and Experimental Study on Hot-Embossing of Glass-Microprism Array without Online Cooling Process

Study on Micromachining of Femtosecond Laser Biomedical Polymer Materials

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