Production of thin-walled sleeves on the piercing mill at PAO STZ

Resumo

The screw piercing of blanks on a two-roller mill with mushroom-shaped rollers is modeled by the finite-element method. That permits calculation of the piercing forces and analysis of its dimensional precision. The models are verified by comparing the calculated and experimental rolling parameters and sleeve dimensions. On that basis, stable rolling of thin-walled 328 × 20.5 and 433 × 26.9 mm sleeves is possible.