A5008211840- Advanced machining processes and optimization
- Advanced Machining and Optimization Techniques
- Advanced Surface Polishing Techniques
- Metal Alloys Wear and Properties
- Surface Treatment and Residual Stress
- Additive Manufacturing Materials and Processes
- Metal and Thin Film Mechanics
- Engineering Technology and Methodologies
- Erosion and Abrasive Machining
- Surface Treatment and Coatings
- Microstructure and Mechanical Properties of Steels
- Manufacturing Process and Optimization
- Advanced Statistical Process Monitoring
- Electrospun Nanofibers in Biomedical Applications
- 3D Printing in Biomedical Research
- Human Mobility and Location-Based Analysis
- Opportunistic and Delay-Tolerant Networks
- Industrial Vision Systems and Defect Detection
- Tunneling and Rock Mechanics
- Mobile Crowdsensing and Crowdsourcing
- Advanced materials and composites
Zhengzhou University
2022-2025
Beihang University
2018-2021
Beijing Advanced Sciences and Innovation Center
2021
Quanzhou Normal University
2018
Titanium alloys are widely used in aviation, marine, automotive, offshore, and medical fields. However, their poor wear resistance reduces the safety reliability of components during service. Few study has been previously conducted on enhancement titanium (including Ti–6Al–4V alloy) processed by mechanical cutting. High-speed ultrasonic vibration cutting (HUVC) is an effective approach for improving machinability alloys. In this study, we attempted to utilize HUVC After conducting high-speed...
Titanium alloys are widely used in the aviation and aerospace industries due to their unique mechanical physical properties. Specifically, thin-walled titanium (Ti) cylinders have received increasing attention for applications as rocket engine casings, aircraft landing gear, aero-engine hollow shaft observed improvement thrust-to-weight ratio. However, conventional cutting (CC) process is not appropriate Ti its low thermal conductivity, high strength, stiffness. Instead, high-speed...
The microstructural evolution and hardening mechanism caused by carburizing heat treatment must be determined to improve the in-service functional performance of components used in advanced equipment for aerospace other industrial applications. Carburizing causes microstructure exhibit heterogeneous characteristics depth direction. In this study, effects on 18CrNiMo7-6 steel were investigated. experimental results show residual austenite (RA) content carburized surface reached 56.2% RA core...
Ti-6Al-4V titanium alloy is widely used in aerospace and other fields due to its excellent performance, but conventional machining has problems such as high cutting force, temperature, tool wear, which leads the difficulty of balancing surface quality efficiency. Ultrasonic vibration-assisted can effectively improve performance. Although force heat ultrasonic have been researched past, selection process parameters mechanism integrity improvement under dry high-speed milling still need be...
A high-speed ultrasonic vibration cutting (HUVC) method has been proposed for the precision machining of Ti and Ni alloys with high efficiency fine surface quality in recent years. During HUVC, tool life can be enhanced significantly at a relatively speed. The effective cooling due to tool-workpiece separation resulting from is regarded as primary reason these advantages. In order figure out influences further understanding mechanism HUVC guidance practical engineering, quantitative...
Dry hard turning (DHT) provides an effective process for finishing high-hardness materials. Machining-induced surface integrity has a direct impact on functional performance. This study compares the effects of DHT and grinding processes machining-induced fatigue performance 18CrNiMo7-6 steel. The experiment were carried out by using polycrystalline cubic boron nitride tool corundum wheel, respectively. 3D morphology, roughness, residual stress, machining accuracy hourglass-shaped specimen...
摘要: 作为一种广泛应用于航空航天领域内的难加工材料,钛合金的高质高效切削一直是机械加工领域中的热点问题。针对其加工过程中的力热聚集问题,一种将高压冷却方式辅助于垂直于切削速度方向振动分离的超声振动切削加工方法被应用于其高质高效加工。首先,刀具和工件周期性的分离条件通过数学方法导出。随后基于此开展了钛合金的车削试验,通过设定不同的切削参数(切削速度、进给量和切深)和冷却参数(冷却液压力),研究了切削力、切削温度、刀具磨损过程、工件表面质量和刀具寿命与相关参数之间的关系。试验结果表明,在满足分离条件的情况下,高压冷却状态下的超声振动切削加工能有效降低切削力和切削温度、延缓刀具磨损速度、改善表面质量和提高刀具寿命。在冷却液压力20 MPa的条件下,钛合金的切削速度能提至400 m/min并保证工件表面质量Ra不超过0.4 μm,实现了刀具长寿命和工件高质高效的切削精加工。
Titanium alloy (Ti) has been widely used in aerospace industry due to excellent mechanical properties and the demands of Ti parts with a high length-to-diameter ratio large diameter are increasing. However, deep hole drilling large-diameter holes is usually both time-consuming cost-consuming series problems such as unfavorable chip removal, helical structure on surface, poor precision severe tool wear. This paper reports cutting mechanism experimental results low-frequency vibration-assisted...