US739493A - Rolling-mill. - Google Patents

Description

APPLIUATIOH FILED JUNE 20, 1902.

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PATENTED-SEPT. 22, 1903.

ROLLING MILL.

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No. 739,493. I PATENTED SEPT. 22, 1903.

G. HARGRBAVBS, J11.

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U ITED STATES Patented September 22, 1903 PATENT ()FFICE.

ROLLING-MILL,

SPECIFICATION forming part of Letters Patent No. 739,493, dated September 22, 1903.

Application filed June 26, 1902. Serial No. 113,194. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE HARGREAVES,

Jr. a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Rolling- Mills, of which the following. is a specification, reference being hadtherein to the accompanying drawings.

This invention relates to new and useful improvements in rolling-mills more especially adapted for rolling iron or steel ingots, billets, or piles, and has for its object to make a mill which will turn out a prepared billet ready for the finishing-rolls without the intervention of human aid after once the heated bloom or billet is placed .upon the feed-table ready for the first pass.

With this object in View the invention consists' in the peculiar construction of the rockingfeed-table, whereby the bloom or billet is received from the lower pass and fed into the upper pass and received on the opposite side of the rolls upon the inclined'guide-ledges on the stationary feed-table, from which it drops of its own weight, is given a partial turn and fed into the next lower pass, and so on until reduced to the desired size.

The invention consists, further, in the peculiar construction of the rolls, whereby a plain intermediate rollis used, and in the peculiar construction of the toe-guide pieces.

The invention consists, further, in the peculiar construction of the inclined guidefianges on the feed-table provided with'supporting-ledges and in the peculiar construction, arrangement, and combination of parts,

all as more fully hereinafter described and claimed in the specification and shown in the accompanying drawings, in which- Figure 1 is a vertical central section through a rolling-mill embodying my invention; Fig. 2, a plan view thereof; Fig. 3, a cross-section on the line y y, Fig. 1; Fig. 4, a cross-section on the line a a, Fig. 2, looking toward the left;

Fig. 5, a similar section illustrating a modified construction; Fig. 6, an enlarged section of a portion of Fig. 4.

As shown in the drawings, A is the stand .or housing, in which the upper, lower, and intermediate rolls B O D are journaled in Suitable bearings, all in the usual manner by the arrows.

and revolving in a direction as indicated by the arrows. (See Fig. 1.) It will be noted, however, in my'construction that a plain intermediate and corrugated upper and lower rolls only are used, for the reasons more fully hereinafter described.

E is a stationary feed-table composed of the longitudinal I-beams F and transverse connecting-beams G, spaced apart a distance to form transverse slots G, between them, and H designates a series of inclined guides extending from the upper to the lower set of rolls and having depending legs H, formed with apertured offsets H in alinement with said slots, through which bolts I are inserted. to laterally adj ustably clamp said guides upon the feed-table.

.J represents feed-rolls extending across the table and journaled at their opposite ends in suitable bearings J on the feed-table, said rolls being provided at one end with bevelgears K, meshing with bevel-pinions L on the longitudinal shaft M, mounted'in bearings M at one side of the feed-table, so that all the rolls are positively driven in a direction to feed the billet or bloom when placed upon the table through the lower pass, as indicated (See Fig. l.) The inclined guides H are each provided at their upper ends with a horizontal ledge or offset-portion a and vertical guide-wall bin alinement with their respective passes, so that as the bar or billet comes from the upperroll it will be supported by said ledge and fed along the same until released by the rolls, when it will fall of its own weight edgewise from said ledge down the inclined side of the guide and 7 into the space betweenthe guides at the bottom, when it comes in contact with the feedrolls at the bottom andis fed forward into the next pass between the lower set of rolls, the bar being given a quarter-turn as'it falls from the upper to the lower set of rolls. v I N is a rocking platform or feed-table formed of longitudinal I-beams and transverse connecting-beams similar to the table E, and 0 represents transverse feed-rollers mounted in suitable bearings O on opposite sides and provided with bevel-gears P at one end, meshing with bevel-pinions Q on the longitudinal drive-shaft'R, mounted in bearings R on the side of the platform, the feed-roll 0 next to the housing being driven by means of straight gears 0 from the next adjacent roll, so as not to interfere with the housing for the rolls.

Srepresentslongitudinalguide-flangeslaterally adjustably bolted to the transverse connecting-beams in a manner similar to those of the stationary table E and cut out on their u nder side to clear the feed-rolls,as shown in Fig. 1. The platform N is pivotally mounted upon the foundation-pier T at one end by means of the transverse shaft '1" and trunnionbearings T on opposite sides, as shown, and is adjustably supported at its opposite end adjacent to the rolls by means of a steamcylinder V, having its piston provided with a transverse arm V, carrying antifrictionrolls V at its opposite ends in rolling contact with the underside of the platform, as shown, so that as the billet passes from the lower set of rolls it will be automatically raised to the upper set of rolls and fed in through the next successive pass by means of the positivelydriven feed-rollers, the acquired momentum of the billet being suflicient to shoot it a slight distance against the resistance of the feed-rollers, so that by the time it is fed back again to the rolls the platform will have had time enough to be raised from its lower to its upper position, and even if it were a little slow it will be noted that should the billet strike the intermediate roll D before it is in alinement with the next pass no harm will be done, as the roll revolves in the right direction to draw it in, or, in other words, its periphery moves upward or with the upward movement of the platform. As all the feed-rollers O O are driven by means ofa shaft and gear in axial line with the pivot-hearing of the platform, it will be seen that the rocking of the platform will not affect the working of the feedrollers in any way, the feed-rolls of both tables being positively driven in a direction to feed anything placed thereon toward the rolls. Ordinarily all three rolls of a set are made with like depressions, so that the side friction of the billet in passing through the rolls on account of the slight incline of the sides of the depressions or corrugations will be taken up and equalized along the horizontal center line of the bar and the bar will come out straight; but as I find a much better product is produced by using a plain intermediate roll and having the corrugation or depression entirely in the upper and lower rolls it will be seen that when a billet is fed into the rolls the speed of the metal at the periphery of the roll will be much greater than that of the metal at the base of the corrugation and the side friction consequently increased, so that if a piece of metal were fed through the upper set of rolls from left to right it would coil right around the upper roll on account of the lower edge traveling faster than the upper edge and choke the roll,

, and to overcome this I yieldingly suspend a shoe or guide V above and fitting into the depression of each pass in the upper roll by means of a coil-spring c, suspended from an arm d on the transverse bar 6, the shoe abutting with its rear end against the undercut portion of the transverse rest-bar f, so that the billet of bar in coming through between the rolls will strikethe under side of the shoe and be guided along the ledge a of the guides H. I do the same with the lower set of rolls; but as this tendency to curve would be in a downward direction I place a toe guide-piece W below the bar or billet, supported with its inner end on the roll 0 and with its outer end on the transverse rest-bar g, so that the bar will be guided in a straight line upon the platform N between the guides S thereon.

In Fig. 5 I have shown a modified construction of guides II for the stationary feed-table, in which a tilting ledge h is pivotally mounted in the upper ends of said guides instead of the lateral offset portion, as shown in Fig. 3, and is provided with vertical and horizontal walls at substantially right angles to each other, a suitable counterweight t' being used to hold the ledge in its normal position to receive the billet and hold it until discharged from the rolls, when the total weight of the billet will overcome thatof the counterweight and automatically dump it.

Having thus fully described my invention, what I claim isy 1. The combination in a three-high mill, of a stationary and feed rocking table, each provided with feed-rollers and mechanism for actuating the same, longitudinal guides mounted on the said feed-tables in alinement with their respective passes, the guides on the rocking table being of different lengths, the guides of the stationary table having their upper portions inclined outwardly in parallel planes and formed at their upper edges with ledges, substantially as described.

2. In combination with a train of rolls, a series of inclined guides, a series of receiving-troughs composed of a side and bottom wall at substantially right angles to each other and pivotally mounted at their meeting ends in the upper ends of said guides and held in their normal position by counterweights, returning-troughs below the receiving-troughs and having feed-rollers to feed the bloom to the rolls, and inclined guides adapted to receive the bloom from the receiving-trough and conduct it into the returning-trough formed by the lower vertical portions of said guides and the feed-rollers, and means for actuating the feed-rollers, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE I-IARGREAVES, JR.

Witnesses:

ABRAM L. DUXBURY, O'rro F. BAR'IHEL.

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