A5026302672- Dynamics and Control of Mechanical Systems
- Control and Dynamics of Mobile Robots
- Soft Robotics and Applications
- Advanced Surface Polishing Techniques
- Vibration and Dynamic Analysis
- Advanced machining processes and optimization
- Advanced Machining and Optimization Techniques
- Metallurgy and Material Forming
- Agricultural Engineering and Mechanization
- Fluid Dynamics Simulations and Interactions
- Adhesion, Friction, and Surface Interactions
- Metal Forming Simulation Techniques
- Robotic Locomotion and Control
- Biofuel production and bioconversion
- Gastrointestinal Bleeding Diagnosis and Treatment
- Bioenergy crop production and management
- Manufacturing Process and Optimization
- Advanced Materials and Mechanics
- Granular flow and fluidized beds
- Sports Dynamics and Biomechanics
- Forest Biomass Utilization and Management
- Drilling and Well Engineering
- Modular Robots and Swarm Intelligence
- Hydraulic and Pneumatic Systems
- Laser and Thermal Forming Techniques
Thai Nguyen University
2017-2024
This article presents a new practical approach to gain better insight into the machinability enhancements of ultrasonic-assisted drilling (UAD) aluminum alloys where depth ratio is larger than 10. UAD can provide as up two times compared that conventional (CD). The material removal rate appeared higher CD by 1.5 times. total torque was considered consist three components: cutting torque, rubbing and stick-slip torque. Both magnitude in were several In contrast, such components took small...
Agricultural residues are the most abundant biomass and forage resources. Chopping is a precondition for either use, reducing shearing force has been considered as one of effective way to save energy. A smaller can also permit more compact mechanical parts chopping devices. In several cases, power consumption may be large, even when small, if corresponding cutting velocity high. Consequently, it important minimize both simultaneously. This paper presents practical approach solve...
This paper presents a new method of combining Minimum Quantity Lubricant (MQL) with ultrasonic assistance in deep hole drilling processes for difficult-to-cut materials, using internal coolant tools. A small amount lubricant as 90 mL/h was provided directly into the cutting zone during under vibrations exerted on tool. comparative experimental study implemented two types processes: conventional (CD) and ultrasonic-assisted (UAD). For each set, three different methods feeding were applied,...
Implementing the ultrasonic vibration-assisted incremental sheet-forming (UISF) process has been proven to significantly reduce forming force, improve surface quality, and enhance accuracy of process. However, such effectiveness primarily focused on easily deformable materials (such as AA1050 AA1060 aluminum alloys) small step-down sizes (from 0.3 mm 0.5 mm). To further process, it is crucial study larger harder materials. In this study, a series UISF experiments were conducted, with ranging...
This paper presents a new approach to developing the torque model in deep hole drilling, both for conventional and ultrasonic assisted drilling processes. The was proposed as sum of three components: cutting, chip evacuation stick-slip torques. Parameters were carried out by applying regression analysis technique, with correlation values higher than 0.999. data collected from 36 experimental dry tests, cutting conditions, depth-to-diameter drilled holes 7.5. major advantage compared previous...
This paper presents an experimental study to find out effective parameter which is useful enhance the progression rate of drifting vibro-impact systems excited by a harmonic force. It assumed that system performance would be better if excitation force stays in harmonious relationship with natural motion impact mass. hypothesis has been numerically analyzed and then experimentally verified. The phase lag between mass used identify best situation, where maximal. found highest can obtained when...
Trong gia công có hỗ trợ siêu âm, cần phải vận hành bộ truyền động rung ở tần số cộng hưởng của phát rung. Bài báo này trình bày một phương pháp đơn giản để xác định nhanh hệ thống âm cho các giá trị khác nhau đường kính và chiều dài công-xôn dụng cụ cắt. Áp V-I, thiết bị thể được đo bằng trở kháng điện. Kết quả thấy, cả cắt đều ảnh đáng kể đến hưởng. Với trước, điều chỉnh lập sao hoạt với hệ. Do đó, kết thu sẽ hứa hẹn ứng trong kế giúp.