Search
Now showing items 91-100 of 261
Design, characterization and experimental testing of two novel reconfigurable joints
(2022-03-11)
This Thesis focuses on the conception and design of joints to be used in reconfigurable parallel manipulators. A set of different joint designs was proposed and subjected to characteristics analysis in order to select the ...
A model-based sustainable productivity concept for the best decision-making in rough milling operations
(Elsevier, 2021)
[EN]There is a need in manufacturing as in machining of being more productive. However, at the same time, workshops are also urged for lesser energy waste in cutting operations. Specially, rough milling of impellers and ...
Study of the Environmental Implications of Using Metal Powder in Additive Manufacturing and Its Handling
(MDPI, 2020-02-17)
Additive Manufacturing, AM, is considered to be environmentally friendly when compared to conventional manufacturing processes. Most researchers focus on resource consumption when performing the corresponding Life Cycle ...
Predicted Torque Model in Low-Frequency-Assisted Boring (LFAB) Operations
(MDPI, 2021-06-24)
A low-frequency-assisted boring operation is a key cutting process in the aircraft manufacturing sector when drilling deep holes to avoid chip clogging based on chip breakage and, consequently, to reduce the temperature ...
Threading Performance of Different Coatings for High Speed Steel Tapping
(MDPI, 2020-05-10)
Threading holes using tapping tools is a widely used machining operation in the industry. This manufacturing process involves a great tool immersion in the part, which involves both friction and cutting. This makes the use ...
A RE Methodology to achieve Accurate Polygon Models and NURBS Surfaces by Applying Different Data Processing Techniques
(MDPI, 2020-11-12)
The scope of this work is to present a reverse engineering (RE) methodology to achieve accurate polygon models for 3D printing or additive manufacturing (AM) applications, as well as NURBS (Non-Uniform Rational B-Splines) ...
Roughing Milling with Ceramic Tools in Comparison with Sintered Carbide on Nickel-Based Alloys
(MDPI, 2021-06-18)
Abstract
Productivity in the manufacture of aircrafts components, especially engine components, must increase along with more sustainable conditions. Regarding machining, a solution is proposed to increase the cutting ...
Functionally Graded AISI 316L and AISI H13 Manufactured by L-DED for Die and Mould Applications
(MDPI, 2021-01-15)
Tooling in the die and mould industry is subjected to high-wear and high-temperature environments, which often leads to the premature failure of this high-added-value tooling. When severe damage occurs, an alternative to ...
Actor-critic continuous state reinforcement learning for wind-turbine control robust optimization
(Elsevier, 2022-04)
[EN] The control of Variable-Speed Wind-Turbines (VSWT) extracting electrical power from the wind kinetic energy are composed of subsystems that need to be controlled jointly, namely the blade pitch and the generator torque ...
Microstructure and Phase Formation of Novel Al80Mg5Sn5Zn5X5 Light-Weight Complex Concentrated Aluminum Alloys
(MDPI, 2021-12-01)
In this work, three novel complex concentrated aluminum alloys were developed. To investigate the unexplored region of the multicomponent phase diagrams, thermo-physical parameters and the CALPHAD method were used to ...