The Experts below are selected from a list of 4938 Experts worldwide ranked by ideXlab platform
Roberto Moura Sales - One of the best experts on this subject based on the ideXlab platform.
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Adaptation for tandem Cold Mill models
Journal of Materials Processing Technology, 2009Co-Authors: Carlos Thadeu De Ávila Pires, H.c. Ferreira, Roberto Moura SalesAbstract:The ideal conditions for the operation of tandem Cold Mills are connected to a set of references generated by models and used by dynamic regulators. Aiming at the optimization of the friction and yield stress coefficients an adaptation algorithm is proposed in this paper. Experimental results obtained from an industrial Cold rolling Mill are presented.
David K. Aspinwall - One of the best experts on this subject based on the ideXlab platform.
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Hard chromium plating of EDT Mill work rolls
Journal of Materials Processing Technology, 1999Co-Authors: Joana Simão, David K. AspinwallAbstract:Abstract Hard chromium plating of Cold Mill work rolls is common practice in order to maintain topography and increase roll service life. The paper details the effect of hard chromium plating on electrical discharge textured (EDT) roll surface topography and surface integrity. Comparative data with corresponding non-chromium plated EDT roll samples are also presented and discussed. Irrespective of the EDT roll surface topography, the coating showed a typical surface hardness in the range HV (0.025)=1100–1300 against approximately 800 HV for the roll base material. The thickness of the hard chromium layers was typically 20–25 μm and cracking of the plated layers was clearly evident as a result of high residual stresses. Measurement of surface residual stress using X-ray diffraction techniques in both the longitudinal and circumferential roll directions indicated highly tensile values between 350 and 700 MPa.
Makishi Nakayama - One of the best experts on this subject based on the ideXlab platform.
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nonlinear receding horizon control of thickness and tension in a tandem Cold Mill with a variable rolling speed
Isij International, 2012Co-Authors: Kohei Ozaki, Toshiyuki Ohtsuka, Kenji Fujimoto, Akira Kitamura, Makishi NakayamaAbstract:For the precise control of tension and thickness in a tandem Cold Mill during acceleration and deceleration, we have developed a nonlinear model including the rolling speed as a time-varying parameter. It is demonstrated from simulation results that nonlinear receding horizon control by real-time optimization results in a satisfactory performance for the nonlinear model.
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nonlinear receding horizon control of thickness and tension in a tandem Cold Mill with a variable rolling speed
Tetsu To Hagane-journal of The Iron and Steel Institute of Japan, 2010Co-Authors: Kohei Ozaki, Toshiyuki Ohtsuka, Kenji Fujimoto, Akira Kitamura, Makishi NakayamaAbstract:For precise control of tension and thickness in a tandem Cold Mill in acceleration and deceleration conditions, we develop a nonlinear model including the rolling speed as a time-varying parameter. It is demonstrated in simulation results that nonlinear receding horizon control by real-time optimization achieves satisfactory performance for the nonlinear model.
Carlos Thadeu De Ávila Pires - One of the best experts on this subject based on the ideXlab platform.
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Adaptation for tandem Cold Mill models
Journal of Materials Processing Technology, 2009Co-Authors: Carlos Thadeu De Ávila Pires, H.c. Ferreira, Roberto Moura SalesAbstract:The ideal conditions for the operation of tandem Cold Mills are connected to a set of references generated by models and used by dynamic regulators. Aiming at the optimization of the friction and yield stress coefficients an adaptation algorithm is proposed in this paper. Experimental results obtained from an industrial Cold rolling Mill are presented.
Joana Simão - One of the best experts on this subject based on the ideXlab platform.
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Hard chromium plating of EDT Mill work rolls
Journal of Materials Processing Technology, 1999Co-Authors: Joana Simão, David K. AspinwallAbstract:Abstract Hard chromium plating of Cold Mill work rolls is common practice in order to maintain topography and increase roll service life. The paper details the effect of hard chromium plating on electrical discharge textured (EDT) roll surface topography and surface integrity. Comparative data with corresponding non-chromium plated EDT roll samples are also presented and discussed. Irrespective of the EDT roll surface topography, the coating showed a typical surface hardness in the range HV (0.025)=1100–1300 against approximately 800 HV for the roll base material. The thickness of the hard chromium layers was typically 20–25 μm and cracking of the plated layers was clearly evident as a result of high residual stresses. Measurement of surface residual stress using X-ray diffraction techniques in both the longitudinal and circumferential roll directions indicated highly tensile values between 350 and 700 MPa.