Vliv vstupního rozměru polotovaru na tvařitelnost při děrování na VM

Abstract

The thesis deals with the production of seamless pipes, specially oblique rolling on piercing machine's operation on a large rolling mills, ovens, Třinecké Železárny, a.s., considering the gradual transition of the input material from billets and ingots to the continuous batch limiting input dimensions of charge. Submitted work is focused on a comparison of the structure of the material after first forming operation-piercing, with varying deflection for each diameter of input products. Various deformation is necessary to vote for a limited portfolio of input dimensions of continuous charge for the entire breadth of assortment of pipes produced on Big 's.