Some Experimental Results Concerning Spread in the Rolling of Lead

Abstract

Lead bars of various height-to-width ratio have been rolled down in a model rolling mill to reductions of as great as 60 percent between rolls designated as smooth, partially rough, and rough. The results of experiments to determine the amount of spread which each bar undergoes are presented nondimensionally, and these are compared with the spread formulas of Wusatowski, Hill, and Sparling.

3D Analysis of cold rolling using a constitutive model for interface friction

“…Thus, Komori [4] has used a 3D upper bound method and has compared with experiments [25] carried out for lead, rolled between perfectly rough rolls. These results show that for R=h 0 =21:3; h=h 0 =0:6 and w 0 =h 0 = 4 the width spread is 16% according to the model and 25% according to the experiments.…”

An experimental investigation on the deformation behavior during wire flat rolling process

“…0 ≤ m ≤ 1/2. Neglecting the stress in the longitudinal direction, then from the Levy-Mises plastic stress-strain relations, we have [10]:…”

“…In this work, two approaches reported for lateral spread in strip rolling are used to develop spread formula for the wire flat rolling process. An approach reported for the spread in strip rolling is as follows [10].…”

“…An improper design can result in an undesirable lateral spread in wire leading to an unsatisfactory product. Although in the past some investigations have been carried out on the design of flat rolling of strips [4][5][6][7][8][9][10][11][12][13][14][15][16][17], there are few research works concentrating on the flat rolling of wires and this merits a further investigation on the process.…”

Three-Dimensional Problems

“…Chitkara and Johnson [17] and Helmi and Alexander [18] conducted experiments of rolling of lead bars and mild-steel bars, respectively, and compared the experimentally determined spreads with those predicted by empirical formulas.…”