Ultrasonic assisted high rotational speed diamond machining of dental glass ceramics

Song, Xiaofei; Yang, Jiajun; Ren, Haitao; Lin, Bin; Nakanishi, Yoshitaka; Yin, Ling

doi:10.1007/s00170-017-1571-8

Cited by 4 publications

(2 citation statements)

References 57 publications

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“…The processing of brittle materials such as ceramic, rock and glass are generally processed in precision and ultra-precision, especially in grinding [106][107][108][109] and polishing [110][111][112]. In addition to traditional machining methods such as cutting, milling and grinding, there are also some emerging auxiliary machining methods, such as: abrasive water-jet machining [113,114], laser-assisted machining [13,92,106,108,[115][116][117][118][119][120][121], ultrasonic machining [122][123][124][125][126][127][128], electron beam machining [129][130][131][132][133], chemical machining [112,134], electro-chemical machining [134] and so on. In the current literatures about the machining simulation of hard-brittle materials through DEM and its coupling method, a lot of works focus on studying the material removal mechanism, crack propagation, machining quality, and the optimization of the machining parameters.…”

Section: Machining Simulationmentioning

confidence: 99%

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Jiang

Tang

et al. 2020

Int J Adv Manuf Technol

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In recent years, the discrete element method (DEM) has been used to model the bulk material, especially for the brittle materials (such as rocks, ceramics, concrete, ice, etc.) with various mechanical properties or responses by setting serials of contact properties (such as bonds) in the particle assembly. These bonds can withstand a certain amount of force and/or moment, so that the stresses executed in the bond can be used for determining the initiation and propagation of micro-crack. There are increasing evidences over the last twenty years that the DEM is becoming an effective numerical method to simulate the cracking, crushing and deformation of continuous media under external loads. The DEM has now been widely used in the field of processing and machining of rock, ceramic, concrete and other brittle materials. In this paper, the theoretical principles, formulations, contact models as well as the numerical solving processes of DEM are introduced. The applications of DEM for the machining processes of brittle and rigid materials such as ceramics are described and reviewed in detail, with future development trend also discussed.

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Section: Machining Simulationmentioning

confidence: 99%

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Jiang

Tang

et al. 2020

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Authors also inferred that tool wear is greatly dependent on surface area of tool, which is in contact with workpiece. Song et al [15] machined dental ceramic with and without using ultrasonic vibrations. Use of ultrasonic vibrations was postulated to prevent the premature failure of dental restoration due to consistent and significant reduction in chipping damage and subsurface damage.…”

Section: Introductionmentioning

confidence: 99%

Investigation of hole quality in rotary ultrasonic drilling of borosilicate glass using RSM

Kumar

Singh

2018

J Braz. Soc. Mech. Sci. Eng.

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The present article emphasizes on reducing the edge chipping and taper during rotary ultrasonic drilling of one of the most demanded ceramic glasses "BK-7." Statistical tools of design of experiments and backing plate were adopted as two distinct approaches to curb the chipping damage. Central composite design has been conjugated with desirability function for framing the design matrix. This investigation also emphasizes to study the effect of process variables-spindle speed, ultrasonic power and feed rate-on the chipping width (CW) and taper (T). After developing the second-order regression models for the CW and T, analysis of variance was used to check the fitness of regression models and recognizing the significant model terms. Then impact of each process parameter was analyzed on responses of interest through 3-D surface plots. The feed rate came forth as the most dominating factor by having maximum influence over the qualitative aspects "CW" and "T" of the drilling process. Interactions of higher rpm and power with lower feed effectively reduced the CW and T. The backing material, employed during main experimentation, also proved its effectiveness to reduce CW when main experiments results were compared to the results of pilot experimentation, which was performed without backing plate. Scanning electron microscope (SEM) was used to analyze the different tool wear modes and microstructure of machined surfaces. Tool weight measurement revealed the dominance of bond fracture and grain fracture during the early stage of the drilling process. Apart from brittle fracture, SEM also affirmed the presence of plastically deformed regions over the machined surfaces. Little deviations between the predicted values and experimental values during the confirmatory tests validated the prediction accuracy of regression models at 95% confidence level.

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An investigation in the ultra-precision fly cutting of freeform surfaces on brittle materials with high machining efficiency and low tool wear

Sun

2018

Int J Adv Manuf Technol

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Ultrasonic assisted high rotational speed diamond machining of dental glass ceramics

Cited by 4 publications

References 57 publications

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Discrete element modeling of the machining processes of brittle materials: recent development and future prospective

Investigation of hole quality in rotary ultrasonic drilling of borosilicate glass using RSM

An investigation in the ultra-precision fly cutting of freeform surfaces on brittle materials with high machining efficiency and low tool wear

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