Formation of Roll Contact in Four-High Mill Stand  Full text

V. A. Nikolaev, S. V. Zhuchenko

Zaporizhzhya State Engineering Academy
226 Lenin Ave., Zaporizhzhya 69006, Ukraine

UDC 621.771.2

Metall. Min. Ind.,  2010, Vol. 2, No. 4, pp. 279-285

Abstract

Reduction of uneven deterioration of roll bodies, broad-strip mill downtime and manufacture of precise transverse section of strip are caused in many respects by application of rational types of grooving of work and back-up rolls in four-high mill stand. Rational roll grooving needs defining the actual length of contact between work and back-up roll. The latter defines sizes of end slopes of back-up rolls and enables to raise accuracy of calculation of work roll natural deflection and values of roll crown out (crown in). The calculation model for determination of rational length of active part of back-up roll body length is suggested in the paper.

Keywords: CALCULATION MODEL, FOUR-HIGH MILL STAND, ROLLS, ROLL CONTACT