The most of researches on ultrasonic assisted grinding process show a reduction in workpiece surface finish and improvement in thermal damage/grinding burn, as well as notable reductions in grinding forces (∼30–70%) (Tawakoli and Azarhoushang, 2008b). It is used for machining of both ductile and brittle materials.
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Thermal analysis of grinding processes can offer theoretical guidance for selecting optimal grinding conditions and process parameters to achieve superior surface integrity, high residual compressive stress levels and extended service life of grinding wheels under high material removal rates [10, 11].Since the proposal of the slip heat …
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Chen et al. [16] also conducted investigations on elliptical ultrasonic grinding with vibration amplitude lager than 3 μm and drew the conclusion that lower surface roughness could be achieved as long as the material was removed in ductile mode. From the literatures above, under the condition of major ultrasonic vibration amplitude, …
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In order to compare the difference in contact performance between the ultrasonic-assisted grinding surface and the conventional grinding surface, and explore the correlation rule between the ultrasonic amplitude and the contact performance of the machined surface, four groups of plane workpiece are studied, which are conventional …
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2.1. Analysis of Kinematics Characteristics of TC4 Titanium Alloy in LTUAG. The LTUAG system is shown in Figure 1 a, which is mainly composed of a longitudinal-torsional ultrasonic vibration system and a ceramic-based CBN (cubic boron nitride) grinding wheel. The longitudinal-torsional ultrasonic vibration system is composed of …
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This paper presents a review on ultrasonic-assisted grinding (UAG) of advanced materials, specifically investigating the effects of ultrasonication on material …
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In the precision fabrication industries, ultrasonic vibration assisted grinding is widely utilized for the finishing of difficult-to-cut materials due to its intermittent cutting mechanism and ...
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C/C-ZrC-Cu composite is a new ablation-resistant material with wide application prospects in the aerospace field. The quality of its surface affects the ablative corrosion resistance of the material. Ultrasonic-assisted grinding (UAG) is an effective processing method for hard and brittle materials. Therefore, it is meaningful work to …
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Fig. 2 shows the motion trajectory of the single grain in ultrasonic-assisted grinding. Points A and B are the lowest contact points between the adjacent grain and the workpiece. O 1 and O 2 are the centre positions of the grinding wheel when the workpiece moves at the feed per cutting point s. θʺ is the angle at which the grinding wheel rotates …
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A potential approach to escalate the contact of grains in the grinding zone is to implement a high frequency (~20 kHz) and low amplitude (2 to 30 μm) vibration in the grinding process, known as Ultrasonic Assisted Grinding (UAG). This process has been classified as 1-dimensional UAG (1D) and 2-dimensional UAG (2D) [6]. The ultrasonic ...
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Compared with conventional grinding (CG), ultrasonic vibration assisted grinding (UVAG) has more prospects and competitiveness in processing AISI 304. Due to the change of strength of materials, when the vibration is superimposed on the workpiece, the mechanism of ultrasonic assisted machining is different from that of tool ultrasonic …
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Effectiveness of surface ultrasonic grinding of ceramics with diamond disks. Science for the Ceramics Industry; Published: April 1980; Volume 37, pages 185–186, (1980) Cite this article; Download PDF. Glass and Ceramics Aims and scope Submit manuscript Effectiveness of surface ultrasonic grinding of ceramics with diamond disks ...
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Axial ultrasonic vibration-assisted face grinding (AUVAFG) of SiC has the characteristics of high efficiency and serious damage. With the aim of solving the problem of serious surface damage in AUVAFG of SiC ceramics, a composite ultrasonic vibration-assisted face grinding (CUVAFG) method involving axial vibration and elliptic vibration …
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The influences of machining methods on grinding force are investigated in the first group, including CG, RUM where the ultrasonic vibration is superposed to the grinding tool, one-dimensional ultrasonic-assisted grinding (1D-UAG) where the workpiece vibrates along the tool feed direction, and 2D-UAG.
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Keywor ds: Grinding, ultrasonic assisted grinding, single grit scr atch test, fluid jet polishing, tungsten carbide, ceramics, Inconel 718 1. Introduction
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The influence of ultrasonic vibration on the single grain movement trajectory is shown in Fig. 3paring Fig. 3 (a) and (b), the ultrasonic vibration increases the reciprocating periodic motion of a single grain along the hole axis direction compared with the single grain movement trajectory without ultrasonic vibration. The contact time …
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Two-dimensional ultrasonic-assisted grinding (2D-UAG) has exhibited advantages in improving the machining quality of hard and brittle materials. However, the grinding mechanism in this process has not been thoroughly revealed due to the complicated material removal behaviors. In this study, multi-step 2D-UAG experiments …
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In ultrasonic machining, a tool vibrating longitudinally at 20 kHz to 30 kHz with an amplitude between 0.01 mm to 0.06 mm is pressed onto the work surface with a light force. As the tool vibrates with a …
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The ultrasonic vibration mill-grinding process can be considered as a combination of ultrasonic vibration machining process and mill-grinding process. As shown in Fig. 1 (a), the grinding wheel's motion relative to workpiece in UVMG includes the rotation motion in its own axis and the feed motion along a helical path.
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The grinding morphology of metal materials is mainly determined by the geometric interference of abrasive particles, which means the machining marks left by the manufacturing process are the key components of the surface structure. However, few researches have been focused on the spatial structure of the grinding morphology. A …
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The ultrasonic assisted grinding experiments of SiC f /SiC composites were performed on a five-axis high-precision machining center (KMC 600S U). Experimental platform for ultrasonic assisted grinding and schematic of grinding direction along different fiber orientations can be seen in Fig. 5 (a) and (b).
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AVA measurement is conducted on a DMG Ultrasonic 20 linear machining centre, and the apparatus for AVA measurement is established through an eddy current sensor, a sensor controller and an oscillator (Fig. 1).The experimental setup is composed of an ultrasonic tool holder, a primary coil device, an ultrasonic power supply, an …
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Ultrasonic wave is a basic form of vibration and its applications are quite common, such as ultrasonic positioning of bats, ultrasonic cleaning in life, and ultrasonic testing in medicine. ... Choi et al. used the finite element method to design and obtain a …
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Coronary rotational atherectomy (CRA) is a minimally invasive interventional procedure used to remove the calcified tissue of the arterial wall. Intravascular ultrasound (IVUS) can be used as an adjunctive imaging modality to enhance the success rate of the procedure. However, for severely calcified or even occluded vessels, traditional side …
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UVAM has been extensively investigated and applied as a hybrid technology combining traditional machining with ultrasonic technology in advanced material processing (see Fig. 3) [18, 27, 28, 44].However, it seems that published reports have only focused on specific methods (e.g. turning, grinding), and thus, a comprehensive …
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Furthermore, as shown in Fig. 2, the grinding traces of multiple abrasives on micro-structured surfaces were simulated according to Eq. (2).The simulation parameters were: wheel diameter of 200 mm, grinding depth of 20 μm, spindle speed of 2000 rpm, feed rate of 0.6 mm/min, grain interval of 1 μm, vibration frequency of 25 kHz and …
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Juntao Jing[15] et al. studied the surface topography model of rotary ultrasonic grinding Si 3 N 4 ceramics based on a neural network. The model based on the BP neural network is established. This algorithm can accelerate the iteration speed and improve the iteration precision. The results provide a basis for surface topography …
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Abstract. To reveal the material removal mechanism of silicon carbide fiber reinforced silicon carbide ceramic matrix (SiCf/SiC) composites during the ultrasonic vibration helical grinding (UVHG) of hole-making process, a hole-making experiment of UVHG was conducted, and the contact behavior between a grain and different …
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Additionally, the introduction of ultrasonic vibrations with the SiO2 nanofluid in MQL system was found to reduce the specific grinding energy, normal grinding forces, tangential grinding forces, and surface roughness by 65%, 57%, 65%, and 18% respectively. Finally, regression analysis was used to obtain an optimum parameter …
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This work presents experimental investigations performed to evaluate the improvement in grinding performance of Ti–6Al–4V alloy using ultrasonic vibration assisted minimum quantity lubrication …
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