A5065457932- Advanced machining processes and optimization
- Advanced Machining and Optimization Techniques
- Advanced Surface Polishing Techniques
- Dynamics and Control of Mechanical Systems
- Vibration and Dynamic Analysis
- Metallurgy and Material Forming
- Soft Robotics and Applications
- Control and Dynamics of Mobile Robots
- Laser and Thermal Forming Techniques
- Metal Forming Simulation Techniques
- Drilling and Well Engineering
- Gastrointestinal Bleeding Diagnosis and Treatment
- Modular Robots and Swarm Intelligence
- Forest Biomass Utilization and Management
- Biofuel production and bioconversion
- Magnetic Bearings and Levitation Dynamics
- Fluid Dynamics Simulations and Interactions
- Granular flow and fluidized beds
- Sports Dynamics and Biomechanics
- Advanced Materials and Mechanics
- Agricultural Engineering and Mechanization
- Adhesion, Friction, and Surface Interactions
Thai Nguyen University
2017-2023
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,...
This paper presents an experimental study of the positive effects vibration-assisted deep drilling aluminum alloy Al-6061. The four most important evaluation criteria in drilling—machinability, workpiece temperature, torque, and material removal rate—were chosen to be investigated. Holes with a depth-to-diameter ratio 13 were drilled by high speed steel (HSS) twist drill bits 3 mm diameter, using both methods conventional (CD) ultrasonic-assisted (UAD). Three levels axial force 6 kgf, 9 12...
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...
In this paper, the influence of ultrasonic vibration on forming forces and surface quality products formed using an ultrasonic-assisted incremental sheet (UISF) method was investigated compared with (ISF) method. The elements parameters used for research include a Al 5052 aluminum alloy thickness 1.0 mm, lathe feed rate 70–130–225 rpm, step size 1.0–1.5–2.0 mm. results show that significantly reduces forces, which main force Fzmax is reduced by about 20%. Besides, also via UISF improved to ISF.