Energy Balance in the Rolling of OCTG on a Stretch-Reducing Mill

Resumo

An equation is obtained to describe the energy balance of the process of rolling oil-country tubular products on a reducing mill. Numerical engineering methods are used to solve integral equations for the components of the energy balance, and it is shown that the theoretical description which is obtained can be put to practical use. A method is presented for analytically determining the lead and lag zones in tube reduction, and a relation is derived to describe how the size of the reduction in the tube’s outside diameter for different values of the friction coefficient affects the speed at which it is leaves the stand.