Parametric study on cylindrical roller forming process

Forces and coefficient of friction during cylindrical three roller bending

“…It was found from the reported model that the bending forces increases with increase in the thickness [4]. Assuming the coefficient of friction at each roller-plate interface as constant, finiteelement analyses (FEA) were also reported in the literatures for three roller bending [6][7][8][9]. Kagzi and Raval [8,9] through reported simulation explained the change in curvature of the plate as well as studied static and dynamic forces during three roller bending.…”

“…Assuming the coefficient of friction at each roller-plate interface as constant, finiteelement analyses (FEA) were also reported in the literatures for three roller bending [6][7][8][9]. Kagzi and Raval [8,9] through reported simulation explained the change in curvature of the plate as well as studied static and dynamic forces during three roller bending. They reported that the forces [8,9] and power [9] increase with increase in thickness of the plate.…”

“…Kagzi and Raval [8,9] through reported simulation explained the change in curvature of the plate as well as studied static and dynamic forces during three roller bending. They reported that the forces [8,9] and power [9] increase with increase in thickness of the plate. They [8] explained the effect of directions of the frictional forces acting on the rollers, on the resultant static as well as dynamic bending forces.…”

“…They [8] explained the effect of directions of the frictional forces acting on the rollers, on the resultant static as well as dynamic bending forces. However, in the reported simulations [6][7][8][9], the effect of the forces on coefficient of friction was not addressed, rather coefficient of friction between each roller-plate interface was assumed to be constant.…”

“…This results in the dynamic forces being calculated at both the bottom rollers to be equal. Moreover, in reported literatures [3][4][5][6][7][8][9], assume the value of coefficient of friction at roller-plate interfaces, unlike the real condition where the CF depends on the forces at the interface.…”