A5101895595- Advanced machining processes and optimization
- Advanced Surface Polishing Techniques
- Advanced Machining and Optimization Techniques
- Advanced materials and composites
- Microstructure and mechanical properties
- Engineering Technology and Methodologies
- Metal Alloys Wear and Properties
- Iterative Learning Control Systems
- Metallurgy and Material Forming
- Non-Invasive Vital Sign Monitoring
- Cardiac Valve Diseases and Treatments
- Wind and Air Flow Studies
- Laser Material Processing Techniques
- Wound Healing and Treatments
- Insect Utilization and Effects
- Dental materials and restorations
- Bone Tissue Engineering Materials
- Acoustic Wave Phenomena Research
- Silk-based biomaterials and applications
- Aeroelasticity and Vibration Control
- Tunneling and Rock Mechanics
- Metal and Thin Film Mechanics
- Machine Fault Diagnosis Techniques
- Welding Techniques and Residual Stresses
- Manufacturing Process and Optimization
Fudan University
2024
Henan Polytechnic University
2015-2024
First Hospital of Lanzhou University
2024
In this study, we propose a longitudinal-torsion ultrasonic-assisted milling (LTUM) machining method for difficult-to-cut materials-such as titanium alloy-in order to realize anti-fatigue manufacturing. addition, theoretical prediction model of cutting force is established. To achieve this, used the edge trajectory LTUM reveal difference in between and traditional (TM). Then, an undeformed chip thickness (UCT) was constructed. From able be A series experiments were subsequently carried out...
Addressing the challenges of high grinding temperature, poor hole quality, and tool rod blocking in core drilling carbon fiber reinforced plastics (CFRP), this study investigates material removal characteristic rotary longitudinal-torsional ultrasonic machining (RLTUM) CFRP based on Hertz contact theory. The also conducts relevant experiments to compare analyze force, wall exit wear ordinary (OCD), (RUM), RLTUM CFRP. results demonstrate that significantly reduces damage improves surface...
This study aimed to explore the motion properties of longitudinal–torsional ultrasonic vibration-aided drilling, feature drilling dynamics, and an efficient path implementing component conversion. It also propose a spiral chute horn with high performance low cost based on propagation characteristics waves. The finite element software ANSYS was used for modal analysis geometric parameters helical flutes were achieved. dynamics system revealed that vibration could improve rigidity drill...
Dimension precision plays an important role in machining. The two-dimensional ultrasonic vibration cutting (TDUVC) method reduces force and alleviates tool wear, meanwhile, laser assisted (LAC) improves the material workability under high temperature. In this paper, heating were combined of tungsten carbide (YG10) to improve machining dimension precision. According experimental results, a prediction model was built based on time series model. results show that is improved significantly...
Laser heating assisted cutting is a lucrative technique for machining difficult-to-machine materials such as tungsten carbide (YG20), which uses high power laser to focally heat workpiece before the material removal with traditional or innovative tool. In latter case, application of ultrasonic vibration edge was found replace continuous mode interrupted one, it reduces adhesion and entanglement chips, improves tool wear surface roughness workpiece. The combination two-dimensional methods has...
Ultra-fine grain materials are widely used due to their superior material properties. In presented work, ultrasonic vibration extrusion cutting (UVEC) is put forward prepare ultra-fine strip. UVEC induces produce strain and rate far exceeding that of ordinary severe plastic deformation process. The mathematical model finite element simulation physical field parameters was established. test platform set up verify each other with previous model. Relationship mechanism among processing...
摘要: 针对钛合金等航空难加工材料,提出采用纵扭复合超声振动辅助铣削的加工方法以实现压应力抗疲劳制造。根据侧铣-顺铣加工特性,基于热力耦合作用建立了钛合金铣削等效三维有限元仿真模型,有效提高了计算效率,实现了刀具作为载体的纵扭超声振动仿真。根据铣削残余应力的形成机理,通过机械应力和热应力的加载-释放,完成了加工残余应力的仿真。利用所建立的有限元模型,从切削力、切削温度以及加工残余应力角度出发,对比分析了传统铣削和纵扭超声铣削的差异性,得出纵扭超声振动能够有效降低切削力和切削温度,增大表面压应力值和压应力层深度。通过试验对纵扭超声铣削等效模型进行了验证,结果表明所建立的三维有限元模型能够以较高的精度对切削力、切削温度和加工残余应力进行预测;进一步通过数值模拟研究了刀具几何参数以及超声表征参数对加工残余应力的影响规律,为实现钛合金的压应力制造奠定了基础。
In hard turning, so-called white layer is often produced on the machined surface, which has a great influence surface integrity and service performance of workpiece. It can be concluded that cutting temperature exerts an important effect production layer. Considering advantages ultrasonic aided turning such as lower force temperature, technology used for processing hardened steel. this paper, GCr15 bearing steel was cut with Polycrystalline Cubic Boron Nitride tool without vibration...
For the longitudinal–torsional composite integrated ultrasonic variable amplitude system with resonance produced by helical slots in cone of launch section, theoretical design, finite element simulation, and experimental study are carried out. The performed analysis slot structural characteristics revealed that depth, angle, width have a strong effect on natural frequency ratio torsional–longitudinal amplitude. A credible technique for adjusting deviation actual from design value traditional...
Ultra-precision machining of tungsten carbide (YG10) can be realized under the combined assistance laser heating and two-dimensional ultrasonic vibration. In order to study wear mechanism PCBN cutting tool its influence on process, condition evolution process flank are observed, tools is analyzed effects Compared with traditional cutting, laser-assisted vibration it studied that effect precision, quality, force change in length cut ultrasound composite-assisted (LUAC) characteristics special...
Bearings are the core basic components that determine stable operation of high-end equipment. The traditional processing technology raceway surface has been unable to meet current requirements high precision and quality under premise certain efficiency. As one ultra-precision grinding technologies, electrochemical (ECG) combines advantages machining, makes up for shortcomings grinding, provides an effective way solve this problem. In paper, ECG is successfully applied internal process...