Article
Engineering, Manufacturing
Nitin Dixit, Varun Sharma, Pradeep Kumar
Summary: In this study, an advanced variant of abrasive flow machining (AFM) called ultrasonic-assisted magnetic abrasive flow machining (UAMAFM) was developed. The effects of external assistances, machine, and media-based parameters on material removal and surface roughness improvement were analyzed. Optimized process parameters were determined to achieve maximum material removal and surface roughness improvement. Predictive models based on statistical analysis were also developed.
MATERIALS AND MANUFACTURING PROCESSES
(2023)
Article
Automation & Control Systems
Zhe Lv, Rongguo Hou, Guoyong Zhao
Summary: The use of magnetorheological (MR) fluid can prevent the instability and spreading out of jet flow outside the focusing tube in abrasive waterjet machining, while an external axial magnetic field can improve erosion footprint and processing performance. Results from experiments on alumina validate the effectiveness of applying magnetic field to enhance jet flow concentration and restrain velocity attenuation.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Automation & Control Systems
Qiuyan Wang, Moiz Sabbir Vohra, Shuowei Bai, Swee Hock Yeo
Summary: This study proposed a rotary ultrasonic-assisted abrasive flow finishing (RUA-AFF) method to improve the performance of the AFF process. Experimental results showed that higher ultrasonic vibration amplitude led to better surface quality and increased material removal rate (MRR); higher ultrasonic frequency and rotational speed slightly decreased surface roughness and MRR. There are two material removal modes in the RUA-AFF process, indicating efficient and high-quality finishing of Al6061.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
W. S. Yip, S. To, Zhanwen Sun
Summary: By introducing a magnetic field into ultrasonic assisted diamond cutting, the surface damages caused by ultrasonic tool movements are significantly reduced, resulting in improved surface finishing of machined titanium alloys. The errors in groove depth and width are considerably reduced with the presence of a magnetic field, minimizing the drawbacks of ultrasonic vibration assistance.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Electrical & Electronic
Aayushya Agarwal, Larry Pileggi
Summary: Modern grids with increasing non-linear grid devices require accurate modeling in the time domain. A new methodology for analyzing steady-state response efficiently using traditional transient models is presented, which iterates on the entire waveform to find an accurate time domain waveform capturing steady-state dynamics. This provides a novel and efficient approach for accurately studying the power grid's steady-state.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Engineering, Mechanical
Mahmut Celik, Hakan Gurun, Ulas Caydas
Summary: This study aims to remove the white layer formed on the surface of a titanium alloy using the Magnetic Abrasive Finishing method. The research shows that by varying the machining parameters, the white layer thickness can be significantly reduced, with ultrasound support having a positive effect.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2022)
Article
Engineering, Electrical & Electronic
Fujian Ma, Ziguang Wang, Yu Liu, Zhihua Sha, Shengfang Zhang
Summary: Titanium alloys, known for their low density, high strength, high-temperature resistance, and corrosion resistance, are widely used in aerospace, the military industry, electronics, automotive fields, etc. This research introduces ultrasonic-assisted magnetic abrasive finishing (UAMAF) for high-quality and high-efficiency finishing of titanium alloys.
Article
Engineering, Multidisciplinary
Anant Bhardwaj, Krovvidi Srinivas, Rajiv Chaudhary
Summary: Magnetic Abrasive Finishing has evolved from a significant micro-level finishing process to a nano-level finishing process through advancements in technology and the development of hybrid techniques. Researchers have developed a model to test the feasibility of using wind turbine magnets for Finishing, with Maxwell simulations confirming its potential applications on cylindrical specimens of Brass, Steel, and Aluminum.
JOURNAL OF ENGINEERING RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
Lichao Liu, Denys Grombacher, Matthew Griffiths, Mathias Vang, Jakob Juul Larsen
Summary: Surface nuclear magnetic resonance (NMR) is a unique technique to study groundwater, providing direct insights into water content and pore-scale properties. Steady-state sequences have been shown to enhance signal-to-noise ratio (S/N) in surface NMR, improving noise rejection. The signal processing chain for steady-state surface NMR data, including transient culling, pulse windowing, de-spiking, powerline harmonics subtraction, and spectral analysis, is developed and explained in detail in this article.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Chemistry, Analytical
Bo Du, Jinhu Wang, Julong Yuan, Binghai Lyu, Xinqian Zhang, Chunyu Zhang
Summary: A spherical-array-focused ultrasonic abrasive machining system was established to improve ultrasonic energy and achieve far-field ultrasonic abrasive machining of complex surfaces. The influences of ultrasonic generator current, abrasive concentration, and particle size on material removal properties and surface quality of quartz glass were investigated. The results showed that at low current levels, plastic removal at the nanoscale was observed, while higher current levels resulted in the formation of micron-scale impact removal traces. Increasing abrasive concentration increased impact density and material removal rate, but excessive concentration hindered removal. Abrasive particle size affected cavitation nucleation and acceleration, impacting material removal rate and surface quality.
Article
Automation & Control Systems
Linzhi Jiang, Tieyan Chang, Guixiang Zhang, Yu-Sheng Chen, Xue Liu, Haozhe Zhang
Summary: This study investigates the influence of different machining gaps on the surface integrity of zirconia ceramic (ZrO2) during magnetic abrasive finishing (MAF). It is found that both large and small machining gaps can lead to surface damage and compromise the integrity of ZrO2. The optimal machining gap is determined to be 2 mm, as it ensures significant grinding pressure while promoting plastic removal of the ceramic surface.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Shoya Mohseni-Mofidi, Lars Pastewka, Matthias Teschner, Claas Bierwisch
Summary: This study explores a numerical approach for soft abrasive flow machining (SAFM) to address fluid-structure interface issues and surface erosion, as well as to investigate the effect of an external magnetic field on machining performance. Results show that a magnetic field of suitable strength can considerably improve the performance of SAFM.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Automation & Control Systems
Abbas Moghanizadeh, Fakhreddin Ashrafizadeh, Maziyar Bazmara
Summary: The novel approach of magnetic abrasive finishing enhances the potential for creating different finishing patterns on free-form surfaces without using special fixtures or tool machines. By utilizing a transmission magnetic field, the method allows the creation of various surface roughness patterns simultaneously in different directions. The experiments reveal a direct relationship between changes in surface roughness and electric current and process time.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Review
Engineering, Manufacturing
Ibrahem Maher, Hassan El-Hofy, Mohamed H. El-Hofy
Summary: This article reviews the research directions, process parameters, and performance indicators of ultrasonic assisted electrical discharge machining and ultrasonic assisted micro-electrical discharge machining processes, as well as the enhancement methods for their performance. The study demonstrates the benefits of using ultrasonic vibration assistance in terms of material removal rate, surface quality, and electrode wear rate.
MACHINING SCIENCE AND TECHNOLOGY
(2023)
Article
Automation & Control Systems
Peng Zhang, Zhen Yin, Chenwei Dai, Ziyang Cao, Qing Miao, Kun Zhang
Summary: By establishing a mathematical model for the velocity of the flow field, the study analyzed the effect of ultrasonic vibration on flow velocity; simulated two distributions of the flow field and debris in the interelectrode gap using COMSOL Multiphysics, and analyzed the influence of ultrasonic amplitude; finally, the study found that the machining performance of UVEDM micro-hole improves with increasing ultrasonic amplitude up to the optimal value, beyond which the performance decreases. Compared to EDM micro-hole, MMR is increased by 2.4 times, and electrode loss and hole taper are reduced by 56% and 24%, respectively.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
