Rs. Prakash et al., STEADY-STATE PLANE-STRAIN COLD-ROLLING OF A STRAIN-HARDENING MATERIAL, Journal of materials processing technology, 52(2-4), 1995, pp. 338-358
Knowledge of the roll force and torque and of the interfacial stresses
is important for the design of rolling equipment and for analysing ro
ll deformation. In this work, a model for the steady-state plane-strai
n cold rolling of a strain-hardening material is proposed which can pr
edict the roll force and torque with reasonable engineering accuracy o
ver the usual range of process variables. The model is able to simulat
e the neutral point with the help of Coulomb's law with constant coeff
icient of friction. The effects of various process variables (reductio
n ratio, roll-radius-to-work-thick ness ratio and coefficient of frict
ion) on the roll force and torque and on the interfacial stresses are
also studied. Further, it is shown that if strain-hardening is neglect
ed, these parameters are under-estimated to a significant degree. As t
he quality of the rolled product depends on the deformation pattern, t
he paper also investigates the effects of the process variables and st
rain-hardening on the deformation.