A study on combined vibration drilling by ultrasonic and low-frequency vibrations for hard and brittle materials

Ishikawa, Ken-ichi; Suwabe, Hitoshi; Nishide, Tetsuhiro; Uneda, Michio

doi:10.1016/s0141-6359(98)00014-2

Cited by 75 publications

(31 citation statements)

References 2 publications

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“…The torque diminished slightly (by 14%) when the amplitude was changed from 5 µm to 10 µm and remained unchanged under further increases in the amplitude. The drilling force was shown to drop linearly with vibration amplitude in drilling ceramics using a diamond core drill [24]. Here, it is important to mention that the largest change in the thrust force and torque was for the maximum drilling speed of 3000 rpm.…”

Section: Effect Of Ultrasonics On Force and Torquementioning

confidence: 91%

Experimental investigations of forces and torque in conventional and ultrasonically-assisted drilling of cortical bone

Alam

Mitrofanov

Silberschmidt

2011

Medical Engineering & Physics

188

135

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Citation: ALAM, K., MITROFANOV, A.V. and SILBERSCHMIDT, V.V., 2010.Experimental investigations of forces and torque in conventional and AbstractBone drilling is widely used in orthopaedics and surgery; it is a technically demanding surgical procedure. Recent technological improvements in this area are focused on efforts to reduce forces in bone drilling. This study focuses on forces and a torque required for conventional and ultrasonically-assisted tool penetration into fresh bovine cortical bone.Drilling tests were performed with two drilling techniques, and the influence of drilling speed, feed rate and parameters of ultrasonic vibration on the forces and torque was studied.Ultrasonically-assisted drilling (UAD) was found to reduce a drilling thrust force and torque compared to conventional drilling (CD). The mechanism behind lower levels of forces and torque was explored using high-speed filming of a drill-bone interaction zone and was linked to the chip shape and character of its formation. It is expected that UAD will produce holes with minimal effort and avoid unnecessary damage and accompanying pain during the incision.

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Section: Effect Of Ultrasonics On Force and Torquementioning

confidence: 91%

Experimental investigations of forces and torque in conventional and ultrasonically-assisted drilling of cortical bone

Alam

Mitrofanov

Silberschmidt

2011

Medical Engineering & Physics

188

135

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“…By this token, the active cutting edges on each individual abrasive would distinctly increase, considerably alleviating the frictional effects encountered in the abrasivematerial interactions, thus significantly suppressing the abrasive dislodgements. These arguments were supported by the experimental investigation of Ishikawa et al [5]. However, the topography observation of the abrasives situated on the tool end face represented that abrasive flattening dominated the wear pattern in the primary wear stage, as mentioned by Zeng et al [6].…”

Section: Introductionmentioning

confidence: 71%

Influences of high-frequency vibration on tool wear in rotary ultrasonic machining of glass BK7

2015

Int J Adv Manuf Technol

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This investigation represented a fundamental research on the potential effects of the ultrasonic on the tool wear involved in rotary ultrasonic machining (RUM) of glass BK7 process. Comparative examinations of the profile deviations and abrasive morphologies of the two diamond tools produced with and without ultrasonic were conducted with optical microscopy, 3-D optical profiler, and scanning electron microscopy (SEM), and their resultant effects on the dimension accuracy and the surface quality of the machined component were also explored. Giving consideration to the strain rate effects of the material provoked by the ultrasonic superposition, the split Hopkinson pressure bar (SHPB) experiments were employed to validate their effects on the dynamic mechanical properties of glass BK7. Afterward, the active mechanisms of abrasive splitting were investigated theoretically. It was found that the ultrasonic superposition by means of suppressing the abrasive dislodgments reduced the profile deviation of the diamond tool, hereby improving the dimensional accuracy of the component. Furthermore, superimposing an ultrasonic vibration would prolong the service life of the abrasives, and this wear-resistant capacity would increase the amount of the working abrasives, thus improving the specimen surface quality. The morphological observations of the abrasives revealed that ultrasonic superposition led to the splitting characteristics converted from transgranular cracking (macrosplintering) to conchoidal fracture (microsplintering). The dynamic mechanical properties of glass BK7 would increase its Young's modulus, which would reduce the crack nucleation depth in the abrasive, leading the conversion of the splitting appearances.

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“…For these reasons, it is far easier to drill deep holes with RUM than it is with USM [28]. Reproduced from [29] Rotary ultrasonic machining combines the material removal mechanisms . of the ultrasonic machining process and the conventional diamond grinding process.…”

Section: Rotary Ultrasonic Machiningmentioning

confidence: 99%

Modelling of autoresonant control of ultrasonic transducer for machining applications

Voronina

Babitsky

Meadows

2008

Proceedings of the Institution of Mechanical Engineers, Part C:

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A computer model of a non-linear ultrasonic vibrating system with the possibility of autoresonant control is presented in this paper. The system controlled consists of two modules, the first of which is an electromechanical model of an ultrasonic transducer comprising a piezoelectric transducer and a step concentrator. The second module simulates an influence from the machining process. Coefficients of the electromechanical model and its validity were estimated through an identification process based on the experiments with a real ultrasonic transducer. Further, a numerical model of the autoresonant control of this system has been developed. The autoresonant control maintains the resonant regime of oscillation by means of positive feedback, which provides transformation and amplification of the control signal. The model allows the use and comparison of three control strategies depending on the different electrical and mechanical feedback control signals. The results from simulation and from real machining experiments under different control strategies are compared and discussed.

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A study on combined vibration drilling by ultrasonic and low-frequency vibrations for hard and brittle materials

Cited by 75 publications

References 2 publications

Experimental investigations of forces and torque in conventional and ultrasonically-assisted drilling of cortical bone

Experimental investigations of forces and torque in conventional and ultrasonically-assisted drilling of cortical bone

Influences of high-frequency vibration on tool wear in rotary ultrasonic machining of glass BK7

Modelling of autoresonant control of ultrasonic transducer for machining applications

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