Browsing by Author "González Rojas, Hernan Alberto"Més informacióMés informació

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  • 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
    Restricted access - publisher's policy
    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, ...

  • 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 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 ...

  • 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 ...

  • 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 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 ...

  • Estudio del fenómeno de electroplasticidad atérmica en el comportamiento mecánico y metalúrgico del acero AISI-SAE 4140 ensayado a tracción 

    Montilla Montaña, Carlos A.; González Rojas, Hernan Alberto; Higuera Cobos, Oscar Fabián; Kallewaard, Valentina; Sánchez Egea, Antonio José (2018)
    Conference report
    Open Access
    El fenómeno de electroplasticidad (EP por sus siglas en inglés) consiste en el cambio de las propiedades mecánicas de un metal, debido a la aplicación simultánea de esfuerzos mecánicos de tracción, compresión, flexión, ...

  • Evaluation of oscillatory repetitive movements in Parkinson disease and Essential tremor: implications for physiopathology and differential diagnosis 

    Costa, João; González Rojas, Hernan Alberto; Valldeoriola, Francesc; Gaig, Carlos; Tolosa, Eduardo; Valls-Solé, Josep (2009-10-15)
    Article
    Restricted access - publisher's policy