Article
Engineering, Mechanical
Liu Yang, Yuchao Fan, Shaoyun Song, Deguo Wang, Yonglin Zhang, Meili Cao
Summary: Research shows that there are four stages of friction in the process of brown rice milling, and the main wear mechanism is plowing wear. The wear of rice grains is influenced by various factors, further revealing the friction interaction mechanisms for preventing over-milling.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Physics, Multidisciplinary
Swati N. Aideo, Dambarudhar Mohanta
Summary: The study evaluates the wettability characteristics of three different butterflies based on surface roughness, with results showing the microstructural assembly of scales plays a significant role in dewetting features, while static contact angle typically varies between 100-124 degrees. The DBT wing part exhibits the highest contact angle and minimal surface adhesion, while the WA wing surface follows the Cassie-Wenzel model.
Article
Automation & Control Systems
Jin Zhang, Li Ling, Daixin Luo, Chenjie Deng, Xuefeng Huang, Guibao Tao, Huajun Cao
Summary: Longitudinal ultrasonic vibration-assisted high-speed dry milling (LUVAHSDM) is used to improve the cutting performance and surface quality of Ti-6Al-4V (TC4). Various comparisons using different coated tools are made in terms of milling force, temperature, tool wear, surface roughness, and residual stress. It is found that AlTiN-coated tools achieve excellent cutting performance and surface quality, with reduced surface roughness and residual stress.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Polymer Science
Xifang Zhang, Zhenqiang Yao, Haifeng Du, Jiacheng Song, Zhiyi Jin, Wei Xu
Summary: This study investigated the wettability and tribological behaviors of PEEK composite pins with different fillers against Co-Cr alloy discs with various surface textures. The results showed that the presence of CF increased the hydrophilicity of PEEK, while the addition of PTFE increased its hydrophobicity. The incorporation of shallow grooves on the disc surface helped achieve a steady friction between the PEEK blends and Co-Cr alloy.
Article
Automation & Control Systems
Chen Yongqiu, Chen Tao
Summary: Due to its excellent physical properties, titanium alloy is widely used in the aerospace industry. However, machining titanium alloy presents challenges such as low efficiency, tool wear, and poor surface quality. This study conducted experiments on conventional and ultrasonic-assisted milling of titanium alloy with circular-arc milling cutters. The results showed that ultrasonic-assisted milling reduced milling forces, improved tool wear distribution, and enhanced chip removal, resulting in better surface quality.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Qingqing Lu, Saiyu Yang, Liquan Yang, Erbo Liu, Guangxi Li, Daohui Xiang
Summary: This study aimed to develop a longitudinal ultrasonic-assisted milling system to investigate the machinability of titanium alloy Ti-6Al-4V. The results showed that ultrasonic amplitude had the most significant impact on milling force, reducing it by 15.48% compared with conventional milling. The analysis also revealed that milling depth and feed per tooth were the dominant factors influencing cutting force. Ultrasonic-assisted milling led to reduced surface roughness and enhanced surface quality.
Article
Engineering, Manufacturing
Minghuan Wang, Ruiyong Zhang, Yongchao Shang, Jinsong Zheng, Xindi Wang, Xuefeng Xu
Summary: With the increasing demand for small parts in various fields, micro-manufacturing methods with 3D processing capability at the micro/nano scale have become essential. This study proposes the air-shielding ultrasonic assisted electrochemical micro-milling (AUA-EMM) to overcome the limitations of traditional electrochemical micromachining. Experimental results show that AUA-EMM can fabricate complex microstructures with high precision and efficiency.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Materials Science, Multidisciplinary
Mohammadreza Khosrojerdi, Mohammad Reza Razfar, Rasul Fesharakifard, Mohsen Khajehzadeh
Summary: Nowadays, 7000 series aluminum alloys, especially Al 7075, have found extensive applications in aerospace industries due to their desirable mechanical properties. However, their corrosion susceptibility and poor abrasion properties have limited their application. Complementary processes such as ultrasonic-assisted ball burnishing have been suggested to overcome these limitations.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2023)
Article
Engineering, Mechanical
Julien Witte, Daniela Huebler, Dirk Schroepfer, Andreas Boerner, Thomas Kannengiesser
Summary: Currently, niobium resources exceed tungsten resources by a significant margin. Brazil is the largest global producer of niobium, accounting for 92% of the market share. Niobium carbides (NbC) offer a sustainable and economic alternative to conventional cutting materials, such as tungsten carbides (WC). This study aims to explore the potential of NbC tools for milling applications through experiments and analyses.
Article
Optics
Yang Li, Shoujian Hou, Yanwei Chai, Yang Zhou, Yun Zou
Summary: The grain sizes of laser cladding coatings vary due to the processing characteristics of laser cladding. In this study, the laser ultrasonic (LU) method was used to nondestructively measure the distribution of grain sizes in laser cladding coatings. The results showed that the LU method can be used to determine the grain sizes of coatings.
Article
Engineering, Mechanical
Hao Lu, Lida Zhu, Zhichao Yang, Boling Yan, Yanpeng Hao, Shaoqing Qin
Summary: This study systematically investigates the mechanisms of surface texture generation and interference in ultrasonic vibration assisted milling (UVAM). Through analytical calculation, a discrete simulation model was developed to predict the topography of typical textures. Experimental verification on difficult-to-machine materials confirmed that micro textures generated by UVAM contribute to interface modification.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Automation & Control Systems
Moran Xu, Changping Li, Rendi Kurniawan, Chen Jielin, Ye In Kwak, Saood Ali, Min Ki Choo, Tae Jo Ko
Summary: Ultrasonic and electrical discharge-assisted milling (US-EDAM) is a new machining method designed for machining difficult-to-cut materials. It combines electrical discharge machining (EDM) and conventional milling with ultrasonic vibration to soften the material's surface, reduce cutting force, and accurately remove the softened surface. Experimental results show that US-EDAM achieves better surface integrity compared to other machining methods.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Zhixin Wang, Xian Rong, Lei Zhao, Xueyang Xing, Hui Ma
Summary: Geopolymers have excellent high temperature and corrosion resistance. The bonding strength depends on factors such as chemical composition, formulation, substrate type, and surface roughness. Area scale fractal analysis can effectively predict the bonding performance of geopolymer coatings by characterizing surface roughness.
Article
Engineering, Mechanical
Ruiyang Guo, Tianyu Yu, Mingjun Chen
Summary: The effect of tool-workpiece frictional mechanism on the quality of machined surface in micro-milling of GDP was investigated in this study. The material removal mechanism, wear mechanism, and friction coefficient were analyzed. Regression models of milling forces, surface profiles, shear stresses, and surface roughness with chip thickness were established. The study found that the milling angle had a significant impact on the surface quality.
Article
Engineering, Mechanical
Auezhan Amanov, Ruslan Karimbaev
Summary: The study showed that the newly developed dual UNSM technology can significantly improve rolling friction and rotary bending fatigue of ball screws, where the enhancement of surface integrity and the introduction of compressive residual stress play crucial roles. This technology can ensure smooth motion, low noise, small torque fluctuations, and extended service life of ball screws.
TRIBOLOGY INTERNATIONAL
(2021)