US276629A - Rollinq - Google Patents

Description

(No Modell 2 Sheets-Sheet 1.

J. J.R0BERTS.

" ROLLINGMILL.

Nmzvezm Patented May 1,1883.

` gm I (No Model.) 2 Sheets-Shet 2.

. J. J. ROBERTS. RQLLING MILL.

Pa'ented` May 1,

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i UNITED' .lons J. trousers, or Resume, PENNSYLVANIA.

Y I. .ricittnaeflunur."

".srnexrzoarrolrfommgparty-of .naar 116.276,62, dated-my 1, ieee.'

` Appnuuanmse nwmb'enaiaas. maman i r such inodication ot' the vconstruction ofithe r rollstheret'or as will very materially reduce-the cost o't' thesamel "The objectof my invention is to improve the product of the `mill, increa`se its output,`

decrease the capital r invested in rolls, und give increased strength tothe same, decreasing the liability to accidents in operating the same. I

., attain these objects by the construction of the rolls in-the manner illustrated in theaccompanying drawings, in which similar letters refer tosimilar parts throughout the drawings forming part of this specitication- Y Figure 1, Sheet l; representing a' front elevaton of' a complete merchant-bar mill for iron or steel, showing my Vimproved rolls and housings on the left-hand side. Fig. 2Sheet 1, represents a set -ot' rolls for a three-high mill in accordance with myimprovement. Fig. 3, Sheet 1, is an end view of the same. i Fig. 4, Sheet 2, represents a set of rolls for square bars, preferably used in connection with my improvement. Fig. 5, Sheet 2, is an end ele vation ofa. housing adapted to my improvenient. Fig. 6, Sheet 2, is affront elevation of the same.` Fig. 7 Sheet 2, plan, side, and front elevation of rider or bearing-'boxes used in the housings. Fig. 8, Sheet 2, represents theadjustinglreys. Fig.9, Sheet 2, represents the side guides used inzcoinbiuation with the improved rolls. I

v A represents the housngshoe, adapted to tit the feet'of: the housings mounted thereon, and is provided with the usual' longitudinal holding-down-bolt recess, A', in which'the bolt- ,heads slide. B represents the housings for the rolls; B', thenut-boss; B, the housing-f i screw; B3inclined mortises inthe legs for Vthe keys F, and B" housings for the driving-pin-l ions; B, caps, and B screws'for. sameu G represents the usual fore plate, and D the ordinary side guides used Ain rolling metal.

place by set-screws F'. g represents the ordi- .the same.

represents the seat forthe lower roll, und E the riders for the middle and top rolls. These are' provided with a. key-groove, E, corre-- spending with the mortise B3 in the housinglegs. F are'adjusting-keys-one broad and ingflegs in thel mortises B", and are secured in nurythree-high roughng-rolls. laV represents an ordinary set' ot' threehigh square-bar tinisliin rolls,and J represents my improved step at-bar rolls adapted to a three-high mill. K represents'a bar of metal passing through -the several series ot' rolls and emerging as a iinished tlat bar from my improved rolls in one .one narrow-passing entirely across the hous- Y continuous operation. L are the ordinary coupling-boxes; IVI, the driving-pinions. 1 y

1t is well. known to experts in rolling-mills that rolls for flats, from the manner ot' their construction, are more liableto breakage and accidents of every description than any oth- .ers of the set. l`It'is also well`.known that to manufacture all of the marketable sizes of tlat iron usually kept in stock requires la multi-V plicity ot' rolls, usually amounting to tons ot Itis also well known that to forni Athe various sizes it is common to throw the rolls ont of horizontal level, and thus put a greatstrain upon the necks of the rolls and ering clatter;` also, that after wear, the space ,between the.jcollars and seats becoming enlarged,-it is not an unusual occurrence` for the ,bar to catch while passing.through, and either split eti' the collar, spoilingthe roll, or wind-` ing thereon to break the same'.v K

My system ,of rolls abolishes all of the above defects of the system non;r in n se. Preferably the'roughing and squaring-np rolls .are run faceto tace',.with the grooves equally divided between them. Their alignment lis therefore direct from the pinions, and my step-rolls having their bearings rigidly adjustable bythe keys IF, their center .horizontal-line will agree with tli'e'v other'sets of rolls.V The housings are `the coupling-boxes uniting the same, the wabbling'ot which atv times creates an overpow-y provided Iwith the' usual fore and back' plates,

and upon the fore plates are mounted the usual roo'.,

side guides, so arrangedrelative to the'sze-of bar desiredthat the same shall be passed through the step-opening between the rollev adaptedt0 form said size of bar, iin this l'le-4 i l two extreme diameters.

2 y v f I 276,029

spect not ditlering from present practice in small mills. 1in a set of step-rolls constructed in accordance with my improvement, I lprefer to have them, fora merchant-mill, twenty-four inches between the necks, ten inches diam'- eter at large end, and eight and one-quarter inches at the sinall'eild,necks live and one-halt' inches diameter und six inches long. Ou'rolls of the above size I have eight risers and nine steps or treads equally divided between the The treads or steps vary from three to two and one-half inches in width. Mysystem is, however, all mills, the only dilference being that for shorter rolls there will be fewer steps, and more thail one set ot` rolls will be. required.

o In operation the billet is first passed through the roughingrolls, the grooves selected beiilg those fitting it for the desired ing-up rolls, aild from tllenl to the steprolls, where it is redllced to a llat bar. This operationmay be continuous, as showilA in Fig. 1, Sheet 1, in which K represents the billet, en-

t tering the rougllillg-rolls 'at the`rigllt` aild v lilaliipulatioll ot' the key F,

emerging on tlievleft fron/i a finished flat bar.'

It will be noticed thatl have the coupling boxes placed directly upoii the necks of the rolls, withoilt the intervention of the Vusual spindle. In this way the mill becoliies ilioie the upper step-rolls `compact alld better adapted to do good work. `lt` preferred', the spindles may be used with double coupling-boxes, as at present.

l lilid in practical use, the corners ot' the bar beilig filled out'in the square-tinisliilig rolls, that in its reduction loailatbar in the passage through the step-rolls tlieedge of the bar remains full aild square. As usually arranged, I place my step-rolls in the liousillgs at such distance from center to center as ill leave a space ot one-fourth ot' ail incll between the faces of the rolls at their largest diameter. This space may be reduced or enlarged by a which raises or the positions of as the keys are lowers and rigidly maintains the rolls relative to each other applicable' to o pass in the squari driven out or in. In either position the setscrews F' are tightened upon `them and they 'are securely retained, as desired.

Rolls constructed in accordance with illy system may be lilore rapidly finished in the lathe aiid do .ilot require-the same degree ol' skill to produce iis the present flat-bar rolls. The rolls under my system are much stronger for the same diameter than under the present system of collars and recesses in opposite rolls, which often reduces the body of the roll Yto aless diameter than the necks of the saine.

As before remarked, inyinvention will make a great reductioil in the plant required toproduce bar-iron. Theregnlar variation in the steps of the rolls, with the facility for increasl ing or diminishing the space by the keys,as described, gives superior advail tages to the lnanil facturer in the production ot odd sizes of bars. The repairs are simple, heilig confined to a straight surface, and the rolls muy be used for many years before they would bethrown to one side for wantoi strength, whereas mider the present; system the rolls are soon worn out and rendered nnlit by reason otl weakness tn be further reduced in diameter by re-turuing on the lathe.

I ani aware that keys ior raising alid re. taining the riders ofl housing-rolls, as shown in Figs. 5, 6, and 8, are not new; but I give preference to said nlode ot' adjustment as the simplest and niostl reliable.

Having described iilyiniprovenlent, shown the conslrnciion, and recited-the advantages ot the adoption ot' the same, Idesire to secure by Letters Patent the following claim:

As a new device for the lilanutactnre of inerchant-bar ill iron or steel, a stepped roll void of collars,.constructed as shown and described, adapted to be used ill roll-housings in sets of two, three, or more high, substantially as and for the purpose specified. v

y JOHN J. ROBERTS. Witnesses:

LEWIS REHR, U. W. FEW.

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