US1812248A - Roll - Google Patents

Description

June 30, 1931'. H I I; w. c 1,812,248

ROLL

Filed Dec. 29, 1928' 2 Sheets-Sheet l INVENTOR June 30, 1931. w. c. OBERG 1,812,248

7 ROLL Filed Dec. 29, 1928 2 Sheets-Sheet 2 i Patented June 30.1931

PATENT OFFICE WILLIAM c. onnae, or MUNHALLjrENNsYLvAnrA nonr Application filed December 29, 1928. Serial No. 329,195.

'My invention relates to rolling mills for rolling H and I-bealps andsimilar flanged shapes and having" edgingv roll stands and universal roll stands in tandem, and more particularly relates to a novel construction and relative arrangement of the profiles of the working faces of the rolls of the edging roll and universal roll stands whereby the flanges of the shapes are effectively edged while in clined at an an' le to their'normal position, and the production of flanged shapes having parallel side surfaces as economically as ordinary shapes having tapering flanges is made possible.

In mills of this class there generally is a first or roughing roll train in which the. shapes are partly rolled and a second r011 train in which the further shape rolling operations are carried out and, in some cases completed,

the roll trains each comprising an edging roll stand and tandem universal roll stand, and in a mill constructed to employ rolls embodying my invention there is a universal roll stand forming a third or finishing roll train on the g5 discharge side of the edging roll stand of the second roll train which straigthens the outwardly extending flange portions of the shapes and finishes the shapes.

In the drawings, Figure 1 is a side elevaand Figure 2 is a similar side elevation. of the rolls of the edging roll stand that form a first orroughing roll train, as constructed in accordance with my invention.

Figure 3 is a fragmentary plan on a larger scale showing details in the profile of the sloping end faces of the edging rolls of Figure 2, as made in accordance with the invention. Figure 4- is a side elevation of the rolls of a universal roll stand, and Figure 5 is a side elevation of the rolls of the edging roll stand of a second universal roll train as constructed in accordance with my invention and adapted for use in conjunction with the edging and universal rollstands of Figures 1 and 2 that form the first or roughing roll train. Figure 6 is a. lan similar to that of Figure 3 showing details in the profile of the sloping tion of the rolls ofthe universal roll stand,

end faces of the edging rolls of Figure 5 as made in accordance with this invention. Figure 7 is a diagrammatic plan showing the way the edges of the flanges of the shapes engage with the sloping-end surfaces of the u roll bodies in entering the edging pass in accordance with my. invention, the angles of the sloping surfaces being exaggerated in this figure for the sake of clearness.

In mills having the rolls constructed in accordance with my invention the flange por-' tions of the shapes rolled in the mill have their flange-portions formed to incline outwardly in the initial rolling pass and remain I in such outwardly inclined position until in readiness for a final finishing pass in a separa-te'universal roll trainin which the flange portions are bent to normal position in which they extend at right angles to'the web of the shape.

The horizontal rolls of the universal roll stands determine the length of the web portion or distance between the inner faces of the flange portions of shapes rolled in suchmills the length of the web portion (or distance between the inner faces of the flange portions) corresponding to the length of the body-portion of the horizontal rolls 1n the universal stand. a The vertical side'rolls determine the thickan nessof the flange portions of the shapes in each successive reducing pass given thematerial in the universal roll stand.

' The edging collars on the edging rollstands, which are in tandem with the universal roll stands,'establish and maintain the length of the flange portions of the shapes. Because of the unequal amount of wear on the horizontal rolls of the edging roll stand and those of thehorizontal rolls of the uni- 9o versal stand forming each' roll train, the

length of the roll body or'the distance ,between its end surfaces is lessened much more rapidly on the horizontal rolls of the universal'stand than the corresponding faces 95 of the edging rolls. If the initial length of these roll bodies .is the same, continued use of the rolls causes them to wear unequally to such extent that the horizontal rolls in the, universal stand must be removed and. Me

machined or re-dressed, while the s of the edging rolls are yet in good.

we a

condition and capable of being used for considerably longer time had the length of the bodies of the horizontal rolls in the uni-- stand and those in the edging roll stand not been shortened by wear to such an unequal degree.

it will be apparent that when wear has materially shortened the horizontal rolls of the universal stand and caused a sufficient difference in the relative length of the bodies of the horizontal rolls in the universal stand, and the horizontal edging rolls in the asso ciated edging roll stand, that as the shape being rolled is delivered from the edging roll to the universal roll stand, the side rolls of the universal stand will upset the web portion of the shape lengthwise by torcthe metal inwardly until the flange por tions bear against the end faces of the worn and now shorter horizontal rolls of the universal stand.

also will be readily understood that in the next pass, in which the shape passes from he universal stand into the edging roll stand,

tne lOOCllES'OlE the edging rolls, being worn to a lesser extent and therefore now being longer than the horizontal rolls'oi the associated universal stand, will increase the length of the web portion of the shape (or distance between the inner faces between its flange portions).

lit also will be clear that in the series of back and forth passes given a shape in the reversing roughing roll train that the distance between the inner faces of the flange portions of the shape and corresponding web portion will be alternately increased and lengthened in alternate passes when the difference in the length of the horizontal roll bodies in this train becomes great enough.

The result of such unequal wear is that the rolls of the edging stand, as heretofore constructed, although yet in good condition and capable of much longer use, must be removed from the mills and be re-dressed to again make the bodies of the horizontal rolls of both the edging roll stand and universal roll stand of equal length.

l hen rollin shapes with rolls having profiles made in accordance with my invention, the necessity of removing the edging rolls of the roll trains from the mill and re-dressing them each time the horizontal rolls of the universal stands have become worn too much for further use is avoided and overcome and, the same time, the alternate lengthening and shortening of the web portion in succes- 60 1e passes in this roll train also made uncessary and life of the edging rolls materially inc l drawings the nuthe horizontal top 1 F 5 the vertical side rolls or the universal roll stand forming part of a reversing, first or roughing roll train, the axes of the rolls 2 and 3, 4 and 5 being in the same vertical plane. In tandem with the universal roll stand of this roll train '0 the horizontal rolls 11 and 12 forming the roll stand used. in conjunction with he 1., .ghing roll stand.

The rolls 2 and 3, which are duplicates in size and contour, have necks 8, 8 by which they are mounted in roll housings (not shown) with the usual wabblers 9 on the ends of the roll necks for connecting these positively driven rolls with a reversing adjustable speed motor (not shown). The vertical rolls l and 5, which are duplicates in size and contour, are driven by frictional contact with the metal being rolled. These rolls do not have necks and are rotatably mounted in the roll housings by means of roller bearings and the vertical bearing pins 10.

The horizontal rolls 11 and 12 forming the edging roll stand of the roughing roll train, which also are duplicates, have edging collars 13 on the ends of the roll bodies and necks 14 by which the rolls are mounted in housings, with wabblers 15 on the ends of the roll necks, by which the rolls 11 and 12 are positively driven by a reversing adjust able speed motor (not shown).

In the second roll train, which, like the first roll train, comprises a universal roll stand and an edging roll stand, the numerals 16 and 17 designate the horizontal top and bottom rolls and 18 and 19 the vertical side rolls of the universal roll stand, the axes of the rolls in this universal roll stand also being in the same vertical plane. And. in tandem with the universal roll stand are horizontal rolls 20, 21 which are alike and which form the edging roll stand used in conjunction with the second universal roll stand. The rolls 16 and 17 also have necks 22 by which they are mounted in roll housings and Wabblers 23 on the ends of the roll necks by which the positively driven rolls 16 and 17 are connected to a reversing, adjustable speed driving motor (not shown).

'lhe vertical side rolls 18 and 19 of the universal stand, which are duplicates, are driven by frictional contact with the metal being rolled and do not-,have necks, being rotatably mounted in the roll housings by means of roller bearings and vertical bearing pins 24.

The horizontal rolls 20 and 21 forming the edging roll stand of the second roll train also are duplicates and have edging collars 25 and necks 26 by which they are mounted in roll housings, with wabblers 27 on the ends of the roll necks for operatively connecting them to v a reversing, adjustable speed driving motor.

and like parts have the same numerals with a prime mark applied thereto.

In rollin shapes with rolls made in accordance w1th my invention, the flange portions of the shapes remain inclined outwardly in the reducing operations.

From the foregoing it will be seen that each stand of rolls in the first roll train and in the second roll train has an individual driving motor of the reversing and variable speed type and that the angular velocity of the rolls in one stand is readily varied from the angular velocity of the rolls of the other stands. y

The roll bodies of the horizontal rolls 2 and 3 of the roughing universal stand, (as is shown in Figure 1) have frusto-conical end surfaces 28 which slope or are inclined at an included angle to the peripheral surface of the rolls of more than a right angle, preferably atan angle of 98 degrees. It also will be seen that the vertical rolls 4 and 5 have oppositely sloping peripheral surfaces 29 which are inclined fromcthe middle of the roll toward each end, the eripheral surfaces .of these rolls being para. el to the opposite sloping portions 28 of the end surfaces of the rolls 2 and 3. Y

lhe ends of the bodies of the edging rolls- 11 and 12 (as is shown in Figure 2) also have frusto-conical surfaces 30 which slope or are inclined. at an included angle to the peripheral surface of the rolls ofmp're than a right angle, preferably at an angle of 100 degrees, and there are .edgin collars 13 on the ends of the roll bodies having peripheral working faces 32 which engage with the toes of the flanges of the shapes being rolled, the working faces 32 of the flanges extending at a right angle to the adjacent end surfaces of the roll bodies;

No vertical side rolls are used with the edging rolls and the outer faces of the flanges of the shapes being rolled are unsupported in the flange'edging-operations.

Due to the greater included angle of the side surfaces of the "edging rolls, it will be apparent that the toes of the flanges will contact with the S10 ing end faces 30 of these rolls before the ange toes contact with the periphery 32 of the edging collars 13.

By comparisonof Figures 1' and 2 and the enlarged detail shown in-Figure 3, it will be seen that the included angle between the side surfaces of the rolls 2 and 3 is less than that of the rolls 11 and 12, and that the diam eter of the roll body of the edging rolls 11 and 12 is made small enough relative to the diameter of the collars 13 to avoid contact with the web portion of the shape being rolled.

This diflerence in diameters is provided because the periphery 33 of the. edging rolls 11 and 12 is not intended to and ordinarily does not engage the surfaces of the web of the shapes in the rolling operations (see Figures 2 and 3).

As the purpose of the edging rolls 11 and v adjoining side surfaces 30 while the work ing faces 32 of the edging collars are upset-' *ting the toes of the flange portions by an amount equal to the amount they were lengthened by the vertical side rolls 4 and 5 in the preceding reducing pass in the universal roll stand. 7 The end surfaces of the edging roll bodies are frusto-conical, the surfaces adjacent'the periphery thereof sloping at a. greater angle than the major portion of the end surfaces (see Figure 3 and because it is unnecessary 1' and undesira le for the periphery of these roll bodies of the edging rolls to work on the web portions of the shapes the diameter of the roll bodies of theedging rolls 11 and '12 is made small enough relative to the di ameter of the edging collars 13 to avoid having the surfaces 33 contacting with the web of the shape As shown in Figure 3, the angle of the major portion of the sloping end surfaces 30 of the roll bodies of the edgin rolls (the portion adjoining the edging co lars 13) is inclined atan included angle of 100 degrees to the periphery 33 of the roll bodies and the sloping end surfaces 31 ad jacent the periphery inclines at an an le of 106 degrees to the periphery of the roll y.

This construction, which forms an important feature of my invention, makes the length A. of the roll bodies of the edging rolls 11 and 12 (or the distance between where the peri heries 3O intersect the side surfaces 31) slig tly less than the same dimension on the horizontal rolls 2 and 3 of the universal roll stand.

By varying the profiles of the bodies of the edging rolls with respect to the bodies of the horizontal rolls of the'universal stand in this way it becomes unnecessary to remove the edging rolls lland 12 and re-dress them as frequently as otherwise would be necessary when wear and re-dressing on the end surfaces of the'horizontal rolls 2 and 3 in the universal stand shortens the web width A of vsaid horizontal universal rolls. It will be apparent that when the frusta-conical rolls 2 and 3 when the original length of these roll bodies has been reduced by redressing.

When the horizontal rolls 2 and 3 of the universal stand have become worn by extended use, the length of the web of the shape is not alternately increased by the bodies of the edging rolls 11 and 12 and decreased by the horizontal rolls 2 and 3 in. the universal roll stand and the web length remains substantially constant, the flange portions only being bent slightly instead of the web being upset lengthwise and then stretched in the alternate passes through this roll train.

The edging rolls of the second roll train (as shown in detail in Figure 6) have a profile the same as the edging rolls of the first or roughing roll train which is shown in Figure 3. In Figure 6 the angle of the major portion of the frusta-conical end surfaces 34.- on the roll bodies of the edging rolls 20 and 2]. (the portion adjoining the edging collars 35) are inclined at lesser included angles to the periphery 36 than those of the edging rolls 11 and 12, preferably an angle of 95 degrees which, in turn, is a greater included angle than that of the surfaces 28, 37' on the rolls 16, 1

In rolling flanged shapes with rolls made in accordance with my invention, a shaped bloom having a web and flanges will be elongated and reduced in cross-sectionin the first or roughing roll train by passing the metal len 'hwise through the train in a series of bac and forth passes, the rolls being adjusted after each pass to form the next succeeding pass. The partly rolled shape is then delivered from the first roll train to the second roll train where it is given another series of back and forth asses and further elongated and reduced in cross-section, the rolls of this roll train being adjusted after each time the metal is assed through the roll train. The sha e ten passes to a finishing roll stand in w ch the flange portions are straightened and made to extend in horizontal position, at right angles to the web and is accurately finished to the desired web and flange thickness.

The advantages of my invention will be appreciated by those skilled in the art. By proportioning the diameters of the edging roll collars and the bodies of the horizontal rolls in the universal millso that they will have a peripheral speed approximating the lineal speed of the metal in its travel between the rolls and by varying the angular velocity of the edg ng rolls and the horizontal rolls of the universal stands the wear on the reducing surfaces of the rolls is reduced to a minimum and slip between the roll faces and the material being rolled which causes rapid wear on these surfaces, is practically eliminated.

By making the profiles of the edging rolls ea ers and the horizontal rolls of the universal stands in the way which has been described, the life of the rolls is materially increased. By forming the ends of the horizontal rolls to have frusto-conical surfaces which. extend at an included angle with the peripheries thereof that progressively decrease from. the edging stand of the first or roughing roll train to the edging rolls of the second roll train, the necessity of alternately upsetting and stretching the web portion of the shapes in successive passes is eliminated, and the action of the edging portions on the toes of the flange portion of the shapes is made more certain.

Many modifications in the construction of the profiles of the rolls may be made without departure from the scope of my invention as defined in the appended claims.

ll claim 1. In a rolling mill for rolling flanged shapes, a'tandem roll train comprising a universal roll stand and an edging roll stand, each of said roll stands having horizontal top and bottom rolls with frusto-conical end surfaces on the bodies thereof and-the ends of said edging roll bodies having flange edging collars thereon, each end of the edging roll bodies being frusta-conical and the frustoconical surfaces adjoining the peripheries of the body portions flaring at a greater angle relative to the peripheries than the frustoconical surfaces adjoining the edging collars.

2. in a rolling mill for rolling flanged shapes, a tandem roll train comprising a universal roll stand and an edging roll stand, each of said roll stands having horizontal top and bottom rolls with frusto-conical-end surfaces on the bodies thereof and the ends of said edging rolls having flange edging collars thereon, the end surfaces of said edging rolls being frusta-conical and the frustoconical surfaces adjoining the peripheries of the body portions flarin at a greater angle relative to the peripheries than the frustoconical surfaces adjoining the edging collars, and the length of the body portion at the periphery of said rolls being less on the edging rolls than on the corresponding portion of the horizontal rolls of the universal stand.

3. In a rolling mill for rolling flanged shapes a tandem roll train comprising a universal roll stand and an edging roll stand, a second universal roll train comprising a universal roll stand and an edging roll stand, said second roll train being adapted to receive and further roll partly rolled material from the first roll train, each of said roll stands having top and bottom horizontal rolls with frusto-conical end surfaces on the bodies thereof and the ends of said edging rolls havsa flange edging collars thereon, the end surfaces of said edging rolls being frusta-conical and the frusto-conical surfaces ad'oining the peripheries of the body portions aring at a greater angle relative to the peripheries than the frusto-conical surfaces adjoining the edging collars.

4. In a rolling mill for rolling flanged shapes a tandem roll train comprising a universal roll stand and an edging roll stand, a second universal roll train comprising a universal roll stand and an edging roll stand, said second roll train being adapted to receive and further roll partly rolled material from the first roll train, each of said roll stands having horizontal top and bottom rolls with frusto-conical end surfaces on the bodies thereof and the ends of said edging rolls having flange edging collars thereon, the end surfaces of said edging rolls being frusta-conical, the frusto-conical surfaces adjoining the peripheries of the body portions flaring at a greater angle relative to the peripheries than the frusto-conical surfaces adjoining the edging collars, the length of the body portion of the rolls at the peripheries thereof being less in the edging roll stands than in the horizontal-rolls of the universal stands and the length of the body portion of the edging rolls and of the horizontal, rolls of the universal stand in said second ro train being greater than the same portions of the edging rolls and horizontal rolls in the universal stand of the first roll train.

5. In a rolling mill for rolling flanged shapes a tandem roll train comprising a uni"- versal roll stand and an ed 'ng roll stand, a second universal roll tram comprising a universal roll stand and an edging roll stand, said second roll train being adapted to receive and further roll partly rolled material from the first roll train, each of saidroll stands having horizontal top and bottom rolls with frusto-conical end surfaces on the bodies thereof, the ends of said edging rolls having flan e edging collars thereon, the length of the dy portion of the rolls at the peripheries thereof being less in the edging roll stands than in the horizontal rolls 0 the universal stands and the length of the body portion of the edging rolls and horizontal rolls of the universal stand in said second roll train being greater than the same portions of the edging rolls and horizontal rollsin the uni versal stand of the first roll train.

6. In a rolling mill for rolling flanged I shapes a roll train comprising a universal roll stand and an edging roll stand in tandem therewith, each of said roll stands having horizontal top and bottom rolls with frusto: conical e (1 surfaces on the bodies thereof and with edgmgcollars on the end surfaces of the edging rolls, the periphery of the edging col.- lars and the web rolling peripheries of the horizontal rolls of the universal stand having substantially equal surface speeds in the rollin o erations in said tandem roll trains.

n a rolling mill for rolling flanged shapes a roll train comprising a universal roll stand and an edging roll'stand in tandem with edging collars on the end surfaces of the edging rolls, the periphery of the edging collars on the edging rolls and the web rolling peripheries of the horizontal rolls of the universal stand having substantially equal surface speeds in the rolling operations in said tandem roll trains, and the peripheries of the roll bodies in the edging roll stand bein free of reducing action on the web of the s apes in the rolling operations.

8. In a rolling mill for rolling flanged shapes a roll train comprising a universal roll stand and an edging roll stand in tandem therewith, each of said roll stands having horizontal top and bottom rolls with frustoconical end surfaces on the bodies thereof and with edging collars on the end surfaces of the edging rolls, the periphery of the edging collars and the web rolling peripheries of the horizontal rolls of the universal stand having substantially equal surface speeds and unequal angular velocities.

9. In a rolling mill for rolling flanged shapes, a roughing roll train comprising an edging roll stand and a universal roll stand, a second roll train comprising a universal roll stand and an edgin roll stand, said edging roll stands having orizontal top and bottom rolls with edging collars onthe ends of the roll bodies, said universal roll stands having vertical rolls and horizontal top and bottom rolls, the end surfaces of the body of the horizontal rolls of said stands being frusto-conical and sloping outwardly from the periphery toward the axis of the rolls, the

stands than those of the universal roll stands.

10. In a rolling mill for rolling flanged shapes, a roughing rol l train comprising an edging roll stand and a universal roll stand, a second roll train comprising a universal roll stand and an edging roll stand, said edging roll stands having horizontal top and bottom rolls with edging collars on the ends of the roll bodies, said universal roll stands having vertical rolls and horizontal top and bottom rolls, the end surfaces of the body of the horizontal rolls of said stands being frustoconical and sloping outwardly from the periphery toward the axis of the rolls, the end surfaces of said horizontal rolls-sloping at an included anglegreate'rin the ed ng stands than those of the universal stan s, and the length of the roll bodies at the periphery thereof being greater in the second roll train than in the roughing roll train.

11. Ina rol ing mill for rolling flanged shapes, a roughing roll train comprising an a second roll train comprising a. univ roll stand and an edging roll stand, said edging roll stands having horizontal top and bottom rolls with edging collars on the ends of the roll bodies, said universal roll stands having vertical rolls and horizontal top and bottom rolls, the end surfaces of the body of the horizontal rolls of said stands'bei frustoconical and sloping outwardly rom the periphery toward the axis of the rolls, the end surfaces of said horizontal rolls sloping at an included angle greater in the edging stands than those of the universal stands, and the diameter of theroll bodies of the horizontal edging rolls being smaller than that of the horizontal rolls in the tandem universal roll stand.

12. In a rolling mill for rolling flanged shapes, a roughing roll train comprising an edging roll stand and a universal roll stand, said edging roll stand having horizontal top and bottom rolls with edging collars on the ends of the roll bodies, said universal roll stand having vertical rolls and horizontal top and bottom rolls, the end surfaces of the body of the horizontal rolls of said rollstands being frusto-conical and sloping outwardly from the periphery towardthe axis of the rolls and the end surfaces of said horizontal rolls sloping at an included angle greater in the edging stand than that of the universal stand.

13. In a rolling mill for rolling flanged shapes, a roughing roll train comprising an edging roll stand and a universal roll stand, a second roll train comprising a universal roll stand and an edging roll stand, said edging roll stands having horizontal top andbottom rolls with edging collars on the ends of the roll bodies, the peripheral ed ing surface of said collars extending at rigflt angles to the adjoining end surfaces of the roll bodies, said universal roll stands having vertical rolls and horizontal top and bottom rolls, the end surfaces of the body of the horizontal rolls of said stands being frusto-conical and sloping outwardly from the periphery toward the axis of the rolls, the end surfaces of said horizontal rolls sloping at an included angle greater in the edging stands than those of the universal stands, and the diameter of the roll bodies of the horizontal edging rolls being smaller than that of the horizontal rolls in the tandem universal roll stand.

14. In a rolling mill for rolling flanged shapes, a roughing roll train comprising an edging roll stand and a universal roll stand, said edging roll stand having horizontal top and bottom rolls with edging collars on theends of the roll bodies, the peripheral edging surface of said collars extending at right angles to the adjoining end surfaces of the roll bodies, said universal roll stand having vertical rolls and horizontal top and bottomrolls, the end surfaces of the body of the horizontal rolls of said roll stands being frustoconical and sloping outwardly from the periphery toward the axis of the rolls and the end surfaces of said horizontal rolls sloping at an included angle greater in the edging stand than that of the universal stand.

15. In a rolling mill for rolling flanged shapes, a roll tram comprising a universal roll stand and an edging roll stand in tandem therewith, each of said roll stands having horizontal top and bottom rolls with frustoconical end surfaces on the bodies thereof, and with edging collars on the end surfaces of the edging rolls, the initial diameters of the edging surfaces on said collars and the peripheries of the horizontal rolls in the universal stand being at a fixed ratio.

'16. In a rolling mill for rolling flanged shapes, a roll. tram comprising a universal roll stand and an edging roll stand in tandem therewith, each of said roll-stands having horizontal top and bottom rolls with frustoconical end surfaces on the bodies thereof, and with edging collars on the end surfaces of the edging rolls, the initial diameters of the edging surfaces on said collars and the peripheries of the horizontal rolls in the universal stand being at a ratio of approximate 1y 1 to 1.7.

17. ln methods of rolling flanged beams, the steps including shaping the beam blank by a series of successive passes in a roll train having an edging roll stand and closel adjacent tandem universal roll stand, simultaneously reducing the thickness of the web and flange portions of the blank in the universal stand while changing the length of the flanges by rolling on the flange edges of other portions thereof in the edging roll stand, bending the flanges slightly outward in each pass through the edging roll stand and bending the flanges slightly inward in the passes through the universal roll train.

18. In methods of rolling flanged beams, the steps including shapin the beam blank by a series of successive bee and forth passes in a roll train having an edging roll stand and closely adjacent tandem universal roll stand, simultaneously reducing the thickness of the web andflange portions of the blank in the universal stand while changing the len h vof the flange edges by rolling on the ange edges of other portions thereof in the edging roll stand, bending the flanges slightly outward in each pass through the edging roll stand, bending the flanges slightly inward in the passes through the universal roll train, and finally bending the flanges to normal position and finishing the beam in a final finishing ass in a universal roll stand.

19. n methods of rolling flanged beams, the steps including shaping the beam blank by series of successive passes in a roughing roll train having an edging roll stand and closely'adjacent tandem universal roll stand, simultaneously reducing the thickness of the web and flange portions of the blank in the universal stand While changing the length of the flanges by rolling on the flange edges of other portions thereof in the edging roll stand, bending the flanges slightly outward in each pass through the edging roll stand, bending the flanges slightly inward in the passes through the universal roll train, re-

peating the aforesaid steps in a second intermediate roll train having a universal stand and closely adjacent tandem edging roll stand, and finishing the beam in a final finishing pass in a succeeding universal roll the'blank in the universal stand while changingthelength of the flanges by rollingon the flange edges of other portions thereof in the edging roll stand, bending the flan es slightly outward in each pass through t e edging roll stand, bending'the flanges slightly inward inthe passes through the universal roll train, repeatlng the aforesaid steps in a second intermediate',roll train having-a 'univer s'al stand and closely adjacent tandem edging roll stand, and finishing the beam in a final finishingpass in a succeeding universal'roll stand forming a finishing roll train.

In testimony whereof, I have hereunto set my hand.

WILLIAM C. OBERG.

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