An experimental investigation on the basic mechanisms involved in ultrasonic machining

Soundararajan, V.; Radhakrishnan, V. M.

doi:10.1016/0020-7357(86)90008-9

Cited by 68 publications

(35 citation statements)

References 7 publications

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“…Several non-traditional machining processes, i.e. laser-beam drilling [13][14][15], water-jet drilling (with or without abrasives) [16][17][18], ultrasonic drilling [19,20], electrical discharge machining (EDM) [21], have been reported as alternatives. Nevertheless, conventional drilling continues to be widely used for practical purpose.…”

Section: Introductionmentioning

confidence: 99%

The effect of chisel length and associated pilot hole on delamination when drilling composite materials

Tsao

Hocheng

2003

International Journal of Machine Tools and Manufacture

166

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Drilling-induced delamination often occurs both at the entrance and the exit of the workpiece during drilling of composite material. Investigators have studied analytically and experimentally that delamination in drilling can be correlated to the thrust force of the drill. With a pre-drilled pilot hole, the delamination can be reduced significantly. Early reference reported models of drilling-induced delamination, however, the effect of chisel edge length and pilot hole diameter on delamination is rarely discussed. The optimal range of chisel edge length with respect to drill diameter is derived in this paper. 

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Section: Introductionmentioning

confidence: 99%

The effect of chisel length and associated pilot hole on delamination when drilling composite materials

Tsao

Hocheng

2003

International Journal of Machine Tools and Manufacture

166

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“…Through horn, the effect of vibrations are amplified and concentrate on tool assembly [4,8,9,15,24]. USM tool vibrates along its longitudinal axis with ultrasonic frequency between 20 kHz to 40 kHz [3,10,11,26,28,30]. The amplitude of vibrations are measured in few hundredth of millimeters along longitudinal axis of tool [1,9,15,19].…”

Section: Introductionmentioning

confidence: 99%

“…The amplitude of vibrations are measured in few hundredth of millimeters along longitudinal axis of tool [1,9,15,19]. Horn and tool must be designed with mass and shape considerations, so that the resonance effect can be achieved with in the frequency range [2,10,11,12,28,30,41,43].…”

Section: Introductionmentioning

confidence: 99%

“…Mixture of abrasive and carrier medium is known as slurry [18,27]. The concentration of slurry varies from 30% to 50% by volume [1,3,8,9,12,30,31,40,41,42,62]. It is pumped in between the gap of tool and work surface.…”

Section: Introductionmentioning

confidence: 99%

“…Volumetric material removal rate of USM is relatively low [9,18,22,29,37,58]. Figure 1 shows the schematic diagram of simple USM [2,3,9,30,45]. The new approach of USM is CNC controlled path rotary USM [1,9,10,13,40,41].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mathematical Modeling for Material Removal and Optimization of Ultrasonic Drilling of Polycarbonate and Acrylic Glass for Surface Roughness by GRA Approach

Singh¹

2017

IJMEA

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Abstract:Polycarbonate bullet proof and acrylic heat resistant glasses are used as the functional material in many industrial application. In automobile industries, banks and cabins, polycarbonate bullet proof glass has been used for security purpose. Similarly, acrylic heat resistant glass is used in furnace, microwaves, space craft and airplane applications. In this experimental research paper, Taguchi modal and Grey relational analysis are utilized for the ultrasonic drilling in these materials. For experimentation, input parameters are concentration, abrasive, grit size, power rating, hydrofluoric acid and tool materials. Output parameters are material removal rate, tool wear rate and surface roughness. In which, surface roughness is most significant output parameter, because it describe accuracy of the process. Through optimization analysis, Taguchi modal suggest that 40% abrasive concentration, mixture of (Alumina, Silicon carbide and Boron carbide) abrasive in 1:1:1, 600 grit of abrasive and 1.5% hydrofluoric acid gives best results for drilling in polycarbonate bullet proof glass material. Similarly, in acrylic heat resistant glass, mixture of Silicon carbide and Boron carbide (1:1), 600 grit abrasive and 1% hydrofluoric acid gives the optimum results. Concentration of slurry, abrasive grit size and hydrofluoric acid are the most significant parameters for ultrasonic drilling in both materials. Through Grey relational analysis the surface roughness is improved by 40% and 48% in polycarbonate (UL-752) and acrylic (BS-476) glass respectively.

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Micromechanisms of Delamination in Composite Materials Induced by Drilling

Hocheng

Tsao

2011

Wiley Encyclopedia of Composites

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Drilling is the mostly used secondary machining of the fiber‐reinforced composite laminates, while the delamination around the drill hole occurs frequently during machining. Hole quality is a curb aspect for all hole‐making processes used on composite materials, which can affect the in‐service life under fatigue loads. Numerous studies have been elucidated that delamination is mainly effected by the drill geometry and drilling parameters. Thrust force has been considered as the cause of delamination by several researchers, and it is believed that there is a “critical thrust force” below which no damage occurs. This article presents a comprehensive analysis of delamination in use of various drills. These critical thrust forces at the onset of delamination are theoretically predicted and compared with the twist drill. In addition, the remedy and measurement of the drilling‐induced delamination were also discussed in detail and presented in this article.

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An experimental investigation on the basic mechanisms involved in ultrasonic machining

Cited by 68 publications

References 7 publications

The effect of chisel length and associated pilot hole on delamination when drilling composite materials

The effect of chisel length and associated pilot hole on delamination when drilling composite materials

Mathematical Modeling for Material Removal and Optimization of Ultrasonic Drilling of Polycarbonate and Acrylic Glass for Surface Roughness by GRA Approach

Micromechanisms of Delamination in Composite Materials Induced by Drilling

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