US939170A - Universal rolls for rolling flanged bars. - Google Patents

Description

H. SACK, DECD.

A. SACK, ADHINISTRATRIX. UNIVERSAL ROLLS FOR ROLLING FLANGED BARS.

APPLIOATIQH IILED MAR. 30, 1908. I

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APPLICATION IXLED HAIL 30 1908 r Eafaented Nov 2, 1909 3 SEEETSSHBET 2.

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APPLICATION FILED MAR. 30, 1908. I

' Patented Nov. 2, 1909.

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UN ITED P HUGO SACK, 0F DUSSELDORF,

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UNIVERSAL ROLLS FGB ROLLING: FLENGED BARS.

To all whom it may concern:

Be it known that I, Hue-o Sacn, a citizen of the German Empire, residing at Dusseldorf, Rhenish Prussia, Germany, have invented certain new and useful Improve ments in Universal Rolls for Rolling Flanged Bars. at which the following is a specification.

This invention relates to universal rolls for rolling flanged bars,- being especially an im rovement upon the universal rolls for rolling Ibars with flanges of uniform thickness throughout, oi which flanges the narrow sides are square to the general direction of the flange but which have all edges rounded, such as are disclosed inmy application, for United States Letters Patent,

Serial No. 353,380, filed January 21. 1901' The distinguishing characteristic of such rolls is, that one oi the vertical rolls is formed with annular working grooves each being in cross section rounded at the bottom, but with sides at right angles to each other, and, in like manner, the horizontal rolls are forn d, on the side nearest the other one of the said vertical rolls, with similar annular grooves, rectangular in cross section but rounded at the corner. With this construction the r/esult is obtained that, when the bar leaves the Working stand to have its flanges strai 'htened out in the straightening stand, saidiianges are already rectangular, and of the required size, so that I-bars are obtained Without any taper Whatever. In such universal rolls, upon which the present invention is an improvement, the two annular surfaces or the said vertical roll wnich press againsh-andform, said narrow sides of the corresponding flanges, are extended outward almost in an uninter rupted surface, and the horizontal rolls are formed with undercut annular grooves, into which said extended portions enter, said ex:

tended portions of said surfaces of the vertical roll passing close to the surfaces ofthe horizontal rolls when they come to the plane of rolling. It has now been found that. such rolls, when worn out after much use, could not be re-turned so as to have a proper configuration, because the change in the form of the rims or flanges of-the vertical rolls due to the necessary r e-turning could not be made to correspond With the change in the form of the grooves of the horizontal rolls, whichgrooves continually become Specification of Letters Patent. Application filed ital-eh so, 1908.

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similar view of a t he rolls l.

/cal roughing roll 2 is formed Patented Nov. 2, 1909.

Serial No. 424,133.

larger, as the result of continual re-turning. Consequently, fins are eventually formed on the girders.

The object of the present invention is provide an improved form of these rolls by which this ditticulty can be overcome.

In the accompanying drawinn, Figure 1 a view, partly in section, partly in broken front elevation, of a set of my improved unlversal roughing rolls for rolling I-bars, the bearings being omitted from the drawingi'or simplicity of illustration; Fig. 2 is a modification of the rolls; Figs. 3, at, and 5 are diagrammatic views illustrating three consecutive passes through the rolls.

Referring to the drawing, 1 indicates a pair of horizontal roughing rolls, substan tially alike in form, and 2, 3, indicate a pair of vertical roughing rolls cooperating with At each side of the mill, the contour of the pressure surfaces of the vertical rolls is that of two straight lines 4 meeting atan angle. In like manner, the cross Section, in the plane of rolling, of the pressure surfaces of the two horizontal rolls includes two straight lines 5 which are respectively parallel to the above mentioned lines 4 of the contour of the pressure surfaces of the vertical roll. Theresult of this construction is that,in the operation of rolling, the flanges of the bar are of uniform thickness throughout, this uniformity of thickness continuing from the first stage in the operation of rolling to the last, however much the rolls may be caused to approach each other, so that, without at any time requiring any excessive rolling pressure, to cause any deformation in the shape of the flanges of the i-bar, butm'erely a general 95 elongation of said bar and a corresponding reduction in thethickness of the flanges, the I-bar is finally rolled out having fianges'of uniform thickness throughout. The verti with horizontal annular grooves 6, the cross-sectional form of such groove beinr a right-angled rounded corner, and each 0 the horizontal rolls is formed at the side of the mill next to the other vertical roll 3 with a similar vertical annular grooile 7, By reason of this con traction it is ossihle to roll on Lion, the flanges of which have narrow sides square to the general direction of the flenge, and with corners rounded. After rolling the-bar by the axes of the latter rolls.

means of the roughing rolls herein shown, the bar is finished in a set of finishing rolls, which merely straighten out the flanges. In the roughing rolls shown in my application for'patent above referred to, in the same .way as the pressure surfaces 8 on the other side of the horizontal rolls, which press against and from, the narrow sides of one flange of the I-bar, are now still extended outward in nearly the same general direction, as shown at 9, so also the pressure surfaces 10 of the vertical roll 2 which perform the function of pressing against, and forming, the narrow sides of the other flange of the I-bar, were then extended outward very nearly in the same general direction as said pressure surfaces, and the horizontal rolls on the corresponding side were formed each with an undercut annular groove adapted to receive said extensions, or flanges, of the vertical roll 2. With that construction, when the horizontal roll becamev unduly worn, a certain amount of the metal would be lacking, and a large recess would be formed at the point where the extensions or edges of the flanges of the vertical roll should come into close proximity with the horizontal rolls. By my present construction I overcome this objection, by forming the vertical roll 2 with surfaces 12 substantially parallel with the axis of the roll, and by also forming the horizontal rolls with surfaces 13, substantially at right angles to On account of this new form of the rolls, their life will be considerably lengthened, since no ire-turning of the grooves of the horizontal rolls is now required, and the extension of the corresponding rims for the vertical rolls does not tend to form any fins. This may be clearly seen from Figs. 3, 4, and 5, which show three consecutive passes through the rolls, the full lines indicating the outlines of the rolls, and therefore the cross section of the bar passing betweensaid rolls at that time, and the dotted lines 2 indicating the cross section of the bar produced by the preceding pass. It will be seen, from Fig. 3, for instance, that the sharp edge e of the bar made by the preceding pass, is now rounded by the round corner 6 of the annular groove of the vertical roll, and a similar result is attained on the right hand side. Fins can never be formed at the open parts of the passes on the left hand side, so that the grooves of the horizontal rolls, and the rims of the, vertical roll projecting into said grooves, are no longer necessary.

faces 12 and 13 parallel with the axis of the vertical rolls, they are made so parallel only sear/o forla' part of their width; that is, the modification shown in Fig. 2 is intermediate in construction between the old form of the rolls and the form shown in Fig. 1.

I claim 1. A universal mill, consisting of a air of horizontal rolls having working f ces comprising an intermediate cylindrical surface and outwardly-extending frustoconical surfaces, and a pair of vertical rolls having convex faces opposed to said frustoconical surfaces, said rolls providing a pass comprising a web-portion and outwardlydiverging flange-portions, each horizontal roll having at one end a surface to shape the edge of a flange and at its other end a substantially vertical shoulder, and substantially. cylindrical vertical-roll surfaces opposed tosaid vertical, horizontal-roll shoulders.

2. A universal mill, consisting of a pair of identical asymmetrical horizontal rolls having working faces comprising an interme diate cylindrical surface and outwardly-extending frustoconical surfaces, and a pair of non-identical symmetrical vertical rolls having convex faces opposed to said frustoconical surfaces, said rolls providing a pass comprising a web-portion and outwardlydiverging flange-portions, said horizontal rolls havin at one end surfaces to shape the edges 0 one set of flanges and at their other ends substantially vertical shoulders, and one vertical roll having surfaces to shape the edges of the other set of flanges and substantially cylindrical surfaces opposed to said vertical horizontal roll shoulders.

3. A universal mill, consisting of a pair of horizontal rolls, and a pair of vertical rolls having duplicate convex Working faces, said rolls providing a symmetrical pass consisting of a web-portion and outwardly-(1L verging flange-portions, the horizontal and vertical rolls having adjacent surfaces-arranged to press upon and form the faces of the flanges, and one vertical roll having annular surfaces arranged to press upon and form the edges of the flanges, said vertical roll having surfaces 12 extending outward from said annular surfaces in a vertical plane, and the horizontal rolls havin corresponding surfaces 13 which in the plane of rolling are substantially are adjacent to the suraces 12, substantially as described.

In testimony whereof I have signed my name to this specificationin the presence of two subscribing witnesses.

HUGO SACK.

Witnesses:

PETER LZEBER, WILHELM FLABCHE.

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