High-precision and High-efficiency Micromachining of Chemically Strengthened Glass Using Ultrasonic Vibration

Noma, K.; Takeda, Yu; Aoyama, Tojiro; Kakinuma, Yasuhiro; Hamada, Shota

doi:10.1016/j.procir.2014.03.107

Cited by 17 publications

(9 citation statements)

References 7 publications

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“…In comparison to the conventional drilling process, both the thrust force and the chip evacuation can be improved. Based on prior published research work (Noma, et al, 2014), the authors successfully managed to obtain a synergistic effect by combining the axial ultrasonic vibration-assisted machining and helical milling, in terms of the reduction of the thrust force and the chippings at the machined holes. Figure 2 shows the schematic illustration of the conventional machining and the machining with workpiece bending.…”

Section: Principle Of Ultrasonic Vibration-assisted Machining With Womentioning

confidence: 99%

“…As shown in Table 3, high-precision holes were machined at both the inlet and outlet using this optimum grinding procedure. In a previous study, the authors proposed an ultrasonic vibration-assisted helical milling method under recommended grinding procedure that can drastically reduce the chipping size (Noma, et al, 2014). However, the machining time per hole was about 120 seconds, and a challenge regarding machining efficiency remains.…”

Section: Grinding Test Under Optimum Grinding Proceduresmentioning

confidence: 99%

“…Several researchers (Liao, et al, 2007, Zhang, et al, 2014, Suzuki, et al, 2011, Nambu, et al, 2011, and Liu, et al, 2012 have shown that ultrasonic vibration-assisted machining resulted in the reduction of the cutting force, the improvement of the machined surface, and the extension of the tool life in the drilling of steel, Inconel, tungsten carbide and composite materials. In a previous study, the authors proposed an ultrasonic vibration-assisted helical milling method, and evaluated the effects of the grinding parameters on surface chipping (Noma, et al, 2014). They also proposed a recommended grinding procedure to machine the hole with high accuracy, based on the elicited experimental results.…”

Section: Introductionmentioning

confidence: 99%

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Ultrasonic vibration-assisted machining of chemically strengthened glass with workpiece bending

Noma

Kakinuma

Aoyama

et al. 2015

JAMDSM

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This paper deals with axial ultrasonic vibration-assisted machining with workpiece bending. It was proposed as a novel machining method for the reduction of the chippings at the machined holes during micro through-hole drilling of chemically strengthened glass. In micro through-hole drilling of chemically strengthened glass, machining accuracy and efficiency tend to be low because the material's high hardness and brittleness cause rapid tool wear and large chippings at the inlet and outlet of the machined holes. In order to machine small holes with high accuracy, the reduction of the tensile stress that causes large chippings at the outlet of the machined holes is an issue of primary importance that deserves investigation. In the proposed machining method, the glass plate is bent slightly to be convex upward through the application of a compressive stress at the posterior surface of chemically strengthened glass, with a specially designed jig. Using this proposed method that can reduce the tensile stress, the chipping size at the outlet of the machined holes was successfully reduced with applied compressive stress values of 38.9 MPa. In conclusion, it has been clear that the axial ultrasonic vibration-assisted machining with workpiece bending has the potential for achieving high-precision and high-efficiency machining for chemically strengthened glass.

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Section: Principle Of Ultrasonic Vibration-assisted Machining With Womentioning

confidence: 99%

Section: Grinding Test Under Optimum Grinding Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultrasonic vibration-assisted machining of chemically strengthened glass with workpiece bending

Noma

Kakinuma

Aoyama

et al. 2015

JAMDSM

Self Cite

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show abstract

“…To separate the frontal cutting edges from the cutting area, a feasible strategy is to exert low amplitude (2-20μm) and high frequency (>20 kHz) vibration to helical milling process which proposes the novel hole-making process as ultrasonic assisted helical milling. Kazuki Noma et al [11] performed a study on how ultrasonic vibration affected the micro-scale by helical milling of through holes in chemically strengthened glass. They concluded that helical milling could acquire a higher machining accuracy and cutting efficiency and prolong the life of tools.…”

Section: Introductionmentioning

confidence: 99%

Investigation on cutting performance in ultrasonic assisted helical milling of Ti6Al4V alloy by various parameters and cooling strategies

Zou

Guo

et al. 2023

Int J Adv Manuf Technol

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Ti6Al4V alloy is the typical difficult-to-machine materials and often result in rapid tool wear, leading to poor machining quality in aircraft assembling. Compared to conventional helical milling, the ultrasonic assistant helical milling (UAHM) process has indicated its superior performance, however it is still a great challenge to improve the hole surface quality and accuracy. In addition, few studies has been conducted on the effect of different variables and cooling strategies on the hole-making performance in longitudinal-torsional ultrasonic assisted helical milling (LT-UAHM). This work mainly aims to investigate the surface finish and accuracy of the holes machined in LT-UAHM of Ti6Al4V alloy. The design approach of Taguchi experiment was employed to study how major variables such as the cutting speed, tangential feed, axial feed and the workpiece hardness influence the dimensional and geometrical tolerances and surface roughness. This paper also discussed the effect of three cooling strategies, i.e. dry condition, air coolant and minimum quantity lubrication (MQL) in LT-UAHM. Theoretical analysis demonstrated that the MQL coolant can be nebulized into hyper-fine droplets owing to the resonant cavitation phenomenon. Combined with the penetrating action caused by the separate-cutting principles of LT-UAHM, the cooling and lubrication performance of MQL was further enhanced. As a result, MQL<-UAHM had the most positive effect on circularity, cylindricity, nominal diameter and surface roughness, contributing to 34%, 32%, 39% and 40%, respectively. The second important machining factor was the cutting speed, contributing to 31%, 29%, 36% and 22%, respectively. The tangential feed and workpiece hardness have the negative effect on geometrical accuracy, respectively.

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“…e research mainly falls into a few categories including failure mechanism in the rock resulting from ultrasonic vibration and ultrasonic facilities modification and optimization for rock mechanicsrelated purposes. For instance, the materials of the ultrasonic facilities have been investigated [12,13]. e driller of ultrasonic facilities has been studied as well [14,15].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Failure Law and Mechanism of Red Sandstone under Ultrasonic Vibration Excitation

Wang

Chen

et al. 2022

Geofluids

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Rock breakage is inevitable for creating openings in underground engineering operations. Ultrasonic vibration has been attracting extensive attention for such a practice considering its outstanding performance in rock breakage. In order to understand the fundamental failure mechanism of rocks subjected to ultrasonic vibrations, based on P-wave monitoring and the direct current electric method, we captured the evolution of the failure process of the red sandstone. In addition, we fundamentally analyse the failure mechanisms of the red sandstone using numerical simulation and microscopy scans. It was found that extensive fractures were initiated due to the ultrasonic vibration and the fractures propagated downwards forming a conical shape. The apparent resistivity became as high as 320000 Ω being 16 times the initial resistivity. The fracture propagated downwards as deep as 41 mm. The maximum damage parameter on the testing sample could be as high as 0.68, and it completely failed after 140 s of ultrasonic vibration duration. As a result of numerical simulation, it was found that the microfractures and pores in the testing sample were activated due to the stress wave resulting from the ultrasonic vibration leading to the fracture propagation and eventually complete failure. Through comparing the performance of uniaxial compressive loading and ultrasonic vibration techniques in rock damage, it was concluded the latter has a much higher capacity and competence in rock breakage.

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High-precision and High-efficiency Micromachining of Chemically Strengthened Glass Using Ultrasonic Vibration

Cited by 17 publications

References 7 publications

Ultrasonic vibration-assisted machining of chemically strengthened glass with workpiece bending

Ultrasonic vibration-assisted machining of chemically strengthened glass with workpiece bending

Investigation on cutting performance in ultrasonic assisted helical milling of Ti6Al4V alloy by various parameters and cooling strategies

Experimental Study on Failure Law and Mechanism of Red Sandstone under Ultrasonic Vibration Excitation

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