Now showing items 1-20 of 58

    • A hybrid mixed double-sided incremental forming method for forming Ti6Al4V alloy 

      Valoppi, Beatrice; Sánchez Egea, Antonio José; Zhang, Zixuan; González Rojas, Hernan Alberto; Ghiotti, Andrea; Bruschi, Stefania; Cao, Jian (2016-05-12)
      Article
      Open Access
      Incremental forming can be an alternative manufacturing means in producing biomedical parts characterized by the need of patient-specific geometry. A novel hybrid dieless sheet metal forming process, electrically-assisted ...
    • An ultra-fast annealing treatment by electropulsing during pure copper wire drawing 

      González Rojas, Hernan Alberto; Sánchez Egea, Antonio José; Hameed, Saqib; Bolmaro, Raúl (Multidisciplinary Digital Publishing Institute (MDPI), 2019-11-23)
      Article
      Open Access
      The influence of electropulses in situ on the drawing process of copper wires was investigated with the aim of avoiding time consuming annealing thermal treatments. It was found that with the application of electropulses, ...
    • Angular velocity analysis boosted by machine learning for helping in the differential diagnosis of Parkinson’s Disease and Essential Tremor 

      Loaiza Duque, Julián David; Sánchez Egea, Antonio José; Reeb, Theresa; González Rojas, Hernan Alberto; González Vargas, Andrés Mauricio (Institute of Electrical and Electronics Engineers (IEEE), 2020-05-11)
      Article
      Open Access
      Recent research has shown that smartphones/smartwatches have a high potential to help physicians to identify and differentiate between different movement disorders. This work aims to develop Machine Learning models to ...
    • Ball burnishing process to improve surface roughness 

      González Rojas, Hernan Alberto; Travieso Rodriguez, Jose Antonio; Schulz Pérez, Rudolf (2009-10-16)
      Conference lecture
      Open Access
    • Bottoming bending process assisted by electroplasticity 

      Sánchez Egea, Antonio José; González Rojas, Hernan Alberto; Celentano, Diego Javier; Travieso Rodriguez, Jose Antonio; Llumà Fuentes, Jordi (EUETIB, 2013-12)
      Conference report
      Open Access
      Este estudio reporta la influencia de los efectos atérmicos de la electroplasticidad en el proceso de doblado por estampa. Se fabrica un generador que generar pulsos de 300A y un ancho de 50μs. Los materiales estudiados ...
    • Caracterización de la placa de una herramienta de bruñido con bola asistida por una vibración ultrasónica 

      Gómez Gras, Giovanni; González Rojas, Hernan Alberto; Travieso Rodriguez, Jose Antonio; Nápoles Alberro, Amelia; Sánchez Egea, Antonio José (Publicacions de la Universitat Jaume I (UJI), 2012)
      Conference lecture
      Open Access
      En la industrial actual existen una gran cantidad de componentes mecánicos de máquinas-herramienta, automóviles, aviones, trenes, barcos, moldes, matrices de conformación, y muchas otras piezas; que deben tener una buena ...
    • Caracterización del ángulo de inclinación en los planos sagital y frontal de pacientes enfermos de Parkinson utilizando un acelerómetero triaxial 

      Cardona Foix, Salvador; Zayas Figueras, Enrique Ernesto; González Rojas, Hernan Alberto; Chaná Cuevas, Pedro (2012)
      Conference lecture
      Open Access
      Una de las enfermedades que con frecuencia se presenta en la actualidad en personas adultas es la enfermedad de Parkinson (EP). En el proceso de diagnóstico clínico de la misma se utilizan diferentes exámenes clínicos ...
    • Casting Fe-Al-based intermetallics microalloyed with Li and Ag 

      Villagomez Galindo, Miguel; Carbajal G. Carbajal-De la Torre, G.; Romo Castañeda, J.C.; Bedolla Jacuinde, A.; González Rojas, Hernan Alberto; Espinosa Medina, M.A. (2016-08-29)
      Article
      Open Access
      The effect on the mechanical properties at room temperature of Li and Ag additions to the Fe–Al (40 at.%)-based alloy produced by conventional casting were evaluated in this work. Alloying elements were added into a ...
    • Characterization of ball-burnishing vibration-assisted process 

      Gómez-Gras, Giovanni; Travieso Rodriguez, Jose Antonio; González Rojas, Hernan Alberto; Nápoles Alberro, Amelia; Carrillo, Francisco; Dessein, Gilles (EUETIB, 2013-12)
      Conference lecture
      Open Access
      Este trabajo está dirigido al estudio del proceso de bruñido con bola asistido por una vibración. Se parte de considerar que dicha vibración ayudará al proceso, facilitando la deformación que se produce sobre la superficie ...
    • Comparativa del proceso de bruñido con bola en máquinas de 3 y 5 ejes en piezas de aluminio A92017 y A 96351 

      Travieso Rodriguez, Jose Antonio; Sánchez Egea, Antonio José; Nápoles Alberro, Amelia; Huertas Talón, José Luis; Gómez Gras, Giovanni; González Rojas, Hernan Alberto (Publicacions de la Universitat Jaume I (UJI), 2012)
      Conference lecture
      Open Access
    • Corrosion behavior of an AISI/SAE steel cut by electropulsing 

      Montilla Montaña, Carlos Alberto; González Rojas, Hernan Alberto; Kallewaard Echeverri, Valentina; Tristancho Reyes, José Luis (Multidisciplinary Digital Publishing Institute (MDPI), 2019-11-18)
      Article
      Open Access
      The effect of electropulsing treatment (EPT) on the surface general corrosion behavior of an AISI/SAE 1045 steel under different machining regimes is studied. In the study, the following variables are alternated: high-speed ...
    • Differential diagnosis between Parkinson's disease and essential tremor using the smartphone's accelerometer 

      Barrantes, Sergi; Sánchez Egea, Antonio José; González Rojas, Hernan Alberto; Martí Domènech, Maria Josefa; Compta, Yaroslau; Valldeoriola Serra, Francesc; Simó Mezquita, Ester; Tolosa Sarró, Eduardo; Valls Solé, Josep (2017-08-25)
      Article
      Open Access
      Background: The differential diagnosis between patients with essential tremor (ET) and those with Parkinson’s disease (PD) whose main manifestation is tremor may be difficult unless using complex neuroimaging techniques ...
    • Effect of electroplastic cutting on the manufacturing process and surface properties 

      Sánchez Egea, Antonio José; González Rojas, Hernan Alberto; Montilla Montaña, Carlos A.; Kallewaard, Valentina (2015-03-13)
      Article
      Restricted access - publisher's policy
      This article reports on a novel machining process technique: in situ electrically-assisted turning process based on the influence of electropulsing. A self-made generator was used to induce a current intensity of 90 A, a ...
    • Effect of electropulses on the machinability of a C45E steel 

      Montilla Montaña, Carlos; Kallewaard, Valentina; González Rojas, Hernan Alberto (2019-01-01)
      Article
      Open Access
      This article compares the machinability of a C45E (AISI/SAE 1045) steel type under two different manufacturing processes: conventional machining and pulsed current assisted machining. The testing procedure consisted on the ...
    • Electric power generation from combustion in porous media 

      Bubnovich Ivanovice, Valeri; Pedro San Martin, Pedro; Henriquez Vargas, Luis; Orlovskaya, Nina; González Rojas, Hernan Alberto (2016-09-12)
      Article
      Restricted access - publisher's policy
      Combustion of lean air/fuel mixtures in an inert porous medium provides an efficient way to convert chemical energy of hydrocarbons into thermal energy. The porous medium effectively redistributes the heat allowing the ...
    • Electroplastic cutting influence on power consumption during drilling process 

      Hameed, Saqib; González Rojas, Hernan Alberto; Sánchez Egea, Antonio José; Nápoles Alberro, Amelia (2016-03-12)
      Article
      Open Access
      The aim of this study is to report the use of non-conventional material removal process technique. It was found that electropulses (EPs) assisted drilling process improves the material machinability based on the eletroplastic ...
    • Electropulsing effects on mechanical and metallurgical behavior of AISI-SAE 4140 steel 

      Montilla Montaña, Carlos A.; González Rojas, Hernan Alberto; Higuera Cobos, Oscar Fabián; Kallewaard, Valentina; Sánchez Egea, Antonio J (2018-10-02)
      Article
      Open Access
      The electroplasticity phenomenon (EP) produces changes in the mechanical properties of a metal, due to the simultaneous application of mechanical stresses of compression, bending, etc., and high instantaneous current pulses. ...
    • Estimation of specific cutting energy in an S235 alloy for multi-directional ultrasonic vibration-assisted machining using the Finite Element Method 

      Florez García, Luis Carlos; González Rojas, Hernan Alberto; Sánchez Egea, Antonio José (Multidisciplinary Digital Publishing Institute (MDPI), 2020-01-24)
      Article
      Open Access
      The objective of this work is to analyze the influence of the vibration-assisted turning process on the machinability of S235 carbon steel. During the experiments using this vibrational machining process, the vibrational ...
    • Estimation of the polishing time for different metallic alloys in surface texture removal 

      González Rojas, Hernan Alberto; Sánchez Egea, Antonio José; Travieso Rodriguez, Jose Antonio; Llumà Fuentes, Jordi; Jorba Peiró, Jordi (2018-01-29)
      Article
      Open Access
      The aim of this work is to propose a novel analytical model for predicting the polishing time and behavior of the surface texture removal in different metal alloys. The surface texture, resulting from a previous milling ...
    • Estudio de la variación de la rugosidad y la dureza superficial en piezas torneadas con asistencia de electroplasticidad 

      Montilla Montaña, Carlos; Sánchez Egea, Antonio José; González Rojas, Hernan Alberto; Kallewaard, Valentina (2014)
      Conference report
      Open Access
      Se presentan los resultados de un trabajo experimental destinado a determinar la variación de la rugosidad y la dureza superficial de algunos metales (aluminio 6061, latón SAE 41 y acero SAE 1020), al ser torneados en ...