آخرین محصولات
Improving fatigue properties of normal direction …
Normal-direction ultrasonic vibration-assisted face grinding (ND-UVAFG) has advantages in improving the machinability of Inconel 718, but there is a competitive relationship between higher compressive
Ultrasonic Wet-Milling and Micro-Grinding
Ultrasonication is an efficient means for the wet-milling and micro-grinding of particles. Besides dispersing and deagglomerating, the wet milling is an important application of Hielscher ultrasonic devices.. In particular for the manufacturing of superfine-size slurries, ultrasound has many advantages, when compared with common size reduction …
Performance improvement of eco-friendly MQL technique …
MQL technique has many technological and economic advantages in grinding operation. It can improve grinding performance in terms of surface integrity, grinding forces and G-ratio. On the other hand, MQL is eco-friendly technique because of its small consumption of cutting fluid. Despite these advantages, MQL technique has a …
Axial and composite ultrasonic vibration-assisted face grinding …
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 …
Ultrasonic assisted grinding of advanced materials for …
This paper presents a review on ultrasonic-assisted grinding (UAG) of advanced materials, specifically investigating the effects of ultrasonication on material …
Process of Ultrasonic Machining
The main machine elements for ultrasonic spindle system include (1) high-frequency generator, (2) ultrasonic transducer, (3) ultrasonic amplitude transformer and tool holder, and (4) tool (Boothroyd and Knight 2006; Singal et al. 2008).The ultrasonic machining system is shown in Fig. 3. The ultrasonic transducer, ultrasonic amplitude …
Tribological Properties of Ti6Al4V Alloy Composite Texture …
The Ti6Al4V alloy has been widely used in aerospace equipment and medical devices. However, the poor wear resistance of the Ti6Al4V alloy hinders its further engineering application. In this study, the ultrasonic strengthening grinding process (USGP) and laser texturing process were employed to enhance the wear resistance of …
Ultrasonic vibration-assisted grinding of silicon carbide …
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 …
Improving fatigue properties of normal direction ultrasonic …
The grinding tool was a resin-bonded CBN grinding wheel with a diameter of 20 mm and a barrel radius of 10 mm, and the grit size was 100#. Ultrasonic amplitude was applied in the axial direction of the grinding wheel by self-developed ultrasonic equipment, and grinding parameters were shown in table 4.
Research on ultrasonic grinding ZrO2 ball valve with a cup …
Ultrasonic grinding is an economical and effective processing method that uses high-frequency, high-energy shock and vibration of ultrasound in the grinding process for hard brittle materials. It reduces the force and heat in the grinding process and improves the surface quality effectively solving the processing problems of non-metallic …
Study on surface residual stress of hardened 12Cr2Ni4A alloy …
Ordinary grinding, ultrasonic vibration-assisted grinding (UVAG), and ultrasonic vibration-assisted ELID grinding were used to machine hardened 12Cr2Ni4A alloy steel. The stress state of the machined surface under different grinding methods is explored, and the influence of different parameters on the residual stress on the surface …
Effects of ultrasonic vibrations on brazing mechanism and …
Subsequently, finger-shaped CBN grinding tools were prepared by the UVAIB and CIB approaches, and the superiority of the grinding performance of ultrasonic vibration–assisted brazed abrasives was verified by grinding tests on Ti-6Al-4 V. Section 2 describes the UVAIB equipment, the abrasive grain shear trial, and the grinding …
Improved wear resistance of 440C steel ball via ultrasonic
To address the challenges of enhancing the wear resistance of 440C steel balls, a method of ultrasonic strengthening grinding process (USGP) is introduced. The principle of this method employs ultrasonic waves to drive a mixture consisting of white corundum powder, strengthening liquid, and 440C steel balls.
CBN wear behavior during a single-grain ultrasonic vibrations grinding …
2.2 Radial ultrasonic vibration-assisted grinding device. Figure 2 illustrates the experimental setup of the RUVAG device, which comprises a vibration converter, an ultrasonic generator, two transducers, and horns. The operational principle can be separated into the following two steps. Firstly, the ultrasonic generator provides high …
Ultrasonic vibration assisted grinding of hard and brittle …
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 …
Wear behavior of white alumina and seeded gel abrasive …
The results showed that compared with the conventional creep feed grinding (CCFG), the grinding force was significantly reduced by up to 11 %, an approximately 22 % decline in wear volume at the steady wear stage during ultrasonic vibration-assisted creep feed grinding (UVACFG) when the ultrasonic amplitude was 6 μm.
Ultrasonic vibration-assisted (UV-A) manufacturing …
In UV-A mechanical manufacturing processes, ultrasonic vibration can reduce the machining force through intermittent cutting between machine tools and the …
Review of ultrasonic vibration-assisted machining in …
Abstract. Compared to conventional machining (CM), ultrasonic vibration-assisted machining (UVAM) with high-frequency and small-amplitude has exhibited good cutting performances for advanced materials.
Rotary ultrasonic machining of advance materials: A review
[49] analyzed while performed on rotary ultrasonic machining of alumina-based material concluded that the comparison between conventional machining and diamond grinding can be measured by having input parameters like (spindle speed, feed rate, and ultrasonic-power) to output responses as surface roughness. It determines …
AAC theory for ultrasonic vibration-assisted grinding | The
Ultrasonic vibration-assisted grinding (UVG) has several advantages, such as small grinding force, good surface quality, and high grinding efficiency, outperforming conventional grinding (CG). However, it is sensitive to process parameters, making optimal processing parameters crucial and a major challenge. Therefore, in this study, we …
Ultrasonic-Assisted Grinding
Using ultrasonic energy to drive abrasive particles in the technique known as impact grinding, such materials as germanium, quartz, silicon carbide, ferrites, and synthetic …
Ultrasonic Machining
Ultrasonic machining refers to the application of power ultrasonic vibrations to traditional machine tools and processes, such as drilling, milling, turning, and grinding. It aims to …
Study on grinding performance during ultrasonic vibration …
In the range of experimental parameters, the grinding surface roughness obtained by ultrasonic grinding of WA abrasive wheels and abrasive MA wheels are …
Surface gradient structures in single-crystal nickel alloy …
The ultrasonic vibration time n indicates the impact times of one individual abrasive grain into workpiece surface from cutting-in to cutting-out the grinding zone, as calculated as follows: (1) Δ t = 1 v s a p d s (2) n = Δ t T ′ = a p d s v s T ′ where Δ t is the time required from cutting-in to cutting-out grinding zone, T′ is the ...
Research on modeling of grinding force in ultrasonic
Ultrasonic vibration–assisted grinding (UVAG) shows excellent performance in the machining of difficult-to-cut materials. Grinding force is one of the key factors affecting the quality of the machined surface, which has been investigated both experimentally and theoretically. However, the research on the modeling of the grinding …
Study on grinding performance during ultrasonic vibration …
2.1 Experimental equipment. The equipment utilized in this experiment is a BLOHM Profimat MT-408 precision surface grinding machine, which boasts exceptional cooling capabilities with a flow rate of 90 L/min and pressure of 1.5 MPa, as depicted in Fig. 1.Here, the as-developed ultrasonic vibration system is erected on the worktable (Fig. …
Study on force reduction mechanism in ultrasonic-assisted …
To reveal the mechanism of force reduction due to ultrasonic vibration, this research provides an in-depth analysis of the ultrasonic vibration-assisted scratching …
Simulation Study on Removal Mechanism of Si
2.1 Simulation Finite Element Model of Single Abrasive Rotary Ultrasonic Grinding 2.1.1 Finite Element Mesh Dividing. The construction of diamond grits and hot-pressing sintering Si 3 N 4 ceramic workpiece model is an important prerequisite for meshing. In order to save time cost in grinding simulation, many scholars have …
Improving fatigue properties of normal direction ultrasonic …
Normal-direction ultrasonic vibration-assisted face grinding (ND-UVAFG) has advantages in improving the machinability of Inconel 718, but there is a competitive …
Ultrasonic assisted grinding of advanced materials for …
This paper presents a review on ultrasonic-assisted grinding (UAG) of advanced materials, specifically investigating the effects of ultrasonication on material removal rates (MRR), grinding forces and energy, tool wears, wheel loading, residual stress and surface/subsurface damages. It compares the performance of UAG of …
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