A methodology for the optimization of rolling process.

(1997) A methodology for the optimization of rolling process. Masters thesis, King Fahd University of Petroleum and Minerals.


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English Abstract

This research focuses on the optimization of sheet rolling process. In order to optimize the process effectively, the existing process model has been enhanced especially the neutral zone where the friction changes sign over a region rather than at a point. Pressure and frictional stress distributions as well as total load and torque are thereby estimated as functions of the various rolling parameters. In this analysis, roll flattening has also been taken into account. The main problem of determining the optimum design parameters of sheet rolling is considered. The problem is formulated and solved as a constrained nonlinear programming problem by considering the radius of rolls, front and back tensions as design variables. Minimization of the deflection of the rolls is considered as the objective function for single pass rolling and minimization of the total energy consumption for multipass rolling. Constraints are placed on the induced stresses, neutral angle and the angle of bite for both cold and hot rolling. It has been found that the deflections in the rolls increase with increasing reducing in thickness. In the case of multipass rolling, the optimum number of passes have been found. For example, in the case of reducing a sheet of steel by 40%, the optimum number of passes have been found to be three, for the total energy consumption to be minimum.

Item Type: Thesis (Masters)
Subjects: Mechanical
Department: College of Engineering and Physics > Mechanical Engineering
Committee Advisor: Rao, Ravi S.
Committee Members: Shuaib, Abdelrahman N. and Ouerfelli, M
Depositing User: Mr. Admin Admin
Date Deposited: 22 Jun 2008 13:42
Last Modified: 01 Nov 2019 13:47
URI: http://eprints.kfupm.edu.sa/id/eprint/9528