The Acceptance of two School - level Scientific Research Topics in the field of Mechanics

On the morning of July, 25th 2024, the Department of Science and Technology coordinated with School of Mechanical and Automotive Engineering to organize two school - level Scientfique Research topics in the field of Mechanics under the chairmanship of Assoc. Prof. Dr. Pham Van Dong - Chairman of the Council - Vice Rector of Hanoi University of Industry.

Assoc. Prof. Dr. Pham Van Dong - Chairman of the Council, Vice Rector of Hanoi University of Industry directed a speech

Topic: “Research, design and manufacture non - contact measurement devices for research and training” which was carried out by the research team led by MSc. Nguyen Van Que - Lecturer of School of Mechanical and Automotive Engineering.

At the acceptance meeting, the author presented main purposes of this topic: general research on non - contact measurement technique in manufacturing; research on methods and devices used in non - contact measurement; construction of non - contact measurement device model; research on proposals of experimental models and data processing method; application of non - contact measurement devices in manufacturing (cogwheel, spiral blades, thin - walled parts...); experiment and construction of relationship between technology parameters and the contour deviation of some types of details during the manufacturing process.

MSc. Nguyen Van Que presented a summary of the contents and the result of the scientific research topic.

From there, the group of authors concluded the topic: “Non - contact measurement devices meet measurements such as: Roughness measurement, flatness measurement, measurement of profile deviation, profile measurement, inversion degree, roundess degree... The measurement results compared to those on other modern machines with deviation of less than 10%. The product of the topic can be applied to the direct measurement or as an independent measurement device after manufacturing. They propose some recommendations at the same tine: continue to develop the research on active measurement technology toward the automation of measurement processes; quality control and research the integration of self-optimizing control system; combine with enterprises to develop non - contact measurement devices.

The overview of the School - level Scientific Research Topic Acceptance Council chaired by MSc. Nguyen Van Que

Assoc. Prof. Dr. Nguyen Hong Son - Debater, Head of Department of Science and Technology gave a speech to comment the topic.

The Council evaluated the topic as scientific and practical. The Council unanimously agreed to rate the topic as Passed.

The topic: “Research, design and manufacture magnetorheological polishing equipment using circular Halbach array” is implemented by the research team led by MSc. Nguyen Duy Trinh - Lecturer of School of Mechanical and Automotive Engineering.

The topic is constructed to improve the quality of surface and the efficiency in the magnetic polishing process by integrating a magnetorhelogical slurry circulatory system combined with a circular Halbach array. The continuous circulatory system of abrasive particles in the polishing area is carried out through a conveyor system, which ensures the polishing process being uninterrupted and stable.

MSc. Nguyen Duy Trinh presented the summary of the contents, the result of this scientific research topic.

The research introduced a new model in the magnetorheological polishing with remarkable innovations as follows: “Proposed polishing model using the magnetorheological slurry circulatory system to create new abrasive particles in the polishing area. It is an important advance compared to the traditional methods, where abrasive particles are often consumed without being reused, thereby enhancing the high and stable polishing productivity throughout the process. The circular Halbach

array is an important innovation applied to create a strong magnetic field in the polishing area. This innovation not only optimizes the magnetic force but also controls more precisely the polishing process, which minimizes the force dispersion and enhances the polishing efficiency to the highest level. Throughout the use of the conveyor system, new abrasive particles will be transported into the polishing liquid to ensure the uninterrupted and stable polishing process.

The research applied this model on Polymethyl Methacrylate (PMMA) material and Ti-6Al-4V alloy with common materials in the manufacturing of optical lenses, aerospace and medical equipment. Achieving a roughness surface below 50 nm from an initial level of around 464.895 nm proves the efficiency and breakthrough of the method. The obtained result of quality surface not only proves the possibility of significant enhancement for the surface quality but also expands wide applied opportunities in optical and biomedical industries. The magnetorheological polishing model using a circulatory magnetic current and the circular Halbach array not only is a simple technical innovation but also brings significant scientific value, which opens up new directions for research and application in many different fields. The research not only stops at the model establishment but also analyzes in detail influential factors such as the dimension of abrasive particles, magnetic particles, the polishing distance and the speed from conveyor system to surface roughness.

The overview of the School - level Scientific Research Topic Acceptance Council “Research, design and manufacture magnitorheological polishing equipment using the circular Halbach array.”

The topic was evaluated as having new feature, considerable scientific significane, high practicality by the Council. The Council unanimously agreed to rate the topic as Distinction.