US1900032A

US1900032A - Bar mill

Info

Publication number: US1900032A
Application number: US491217A
Authority: US
Inventors: Worthington Warren
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-10-25
Filing date: 1930-10-25
Publication date: 1933-03-07
Anticipated expiration: 1950-03-07
Also published as: GB379947A; FR729295A; DE593557C; BE385418A

Description

Mamh w. WORTHINGTQN ,900,03

BAR MILL Origi nal Filed Oct. 25 19:50 3 Sheets-Sheet 1 INVENTOR March '7, 193.3. w WORTHINGTON 1,909,032

" BAR MILL Original Filed Oct. 25, 1950 3 SheetsTSheet 2 March '7, 1933. w WORTHINGTON BAR MILL s Sheets-Sheet 3 Original Filed Oct. 25

MNVEIYTIOR. B wa /mm 44", ATTORN EYS.

Patented Mar. 7, 1933 UNITED STATES PATENT OFFICE BABHILL Application filed October 25, 1980, Serial 80. 491,217. lenewed lay 18,1338.

This invention relates to rolling mills and has for an object to produce a mill which overcomes diificulties heretofore encountered with such machines. v

A more specific object is to produce a mill which is particularly adapted for rod and bar mill work and which overcomes difficulties encountered in connection with such work.

Rod. and bar mill products, as ordinarily rolled, are likely to be faulty, due to a lat-- occasioned by what is termed roll sprin In rolling mills, as ordinarily constructe roll spring results from two causes, viz., deflection of the reducing rolls when subjected to the rolling pressures, and a bodily moving apart of those rolls in response the work- 0 ing strains to which they are sub ected. Roll spring, as above defin is recognized in the design and. operation of rolling mills, but 1t 7 is difiicult to control and consequently it is diflicult with the ordinary form of rod or bar mill, to roll products to the desired thickness.

A specific object-of my invention is to pro-' duce an improved mill which will unprove rod and bar mill products. v

The above, and other objects which will be made more apparent'throughout the further description of the invention, are attained by means of a rollin mill embodying .the features herein descri 'd and illustrated in the drawings accompanying and forming a part hereof. 4

, In the drawings, F gure 1 1s aside sectional view of a millembodyin my invention, the view being taken on t 0 line 1- -1 ofFig.2.

Fig. 2 is an end elevation of the mill shown in Fig. 1. I

Fig. 3 is a more or less diagrammatic view of the adjusting mechanism for the reducing rolls; and i Fig. 4 is a fragmentary sectional view of a slightly modified embodiment of my invention, in which the scale of the drawings is increased for convenience of illustration.

Referring to the drawings, the illustrated embodiment of my invention includes a pair of workin rolls 55," which are illustrated as provide with grooves or matrices 6, forming the effective passer throat of the rolls. These rolls are essentially convex' or barrelshaped in that they are provided with convex peripheral surfaces on each side of the grooves or matrices. That is, each roll tapers .on a curved, convex surface from the effective pass or throat toward each end so that it is of greatest diameter at the center and tapers to a smaller diameter at the ends. Each reducing roll is preferably bi-laterally symmetrical about the center line of its groove or matrix.

As illustrated, the rolls 5-5 overhang their sup rting bearings, and are so mounted that t ey are free to move laterally or axially an appreciable amount, but are located between

backing rolls

7 and 7a, which are shownas concave rolls in that the periph- I eral surface of each roll is of greater diameter at the ends than at a point midway between the ends of the roll, and tapers along acurved concave surface toward the intermediate portion of the roll. The concave surfaces of each backing roll are so formed that they correspond m curvature to the convex surfaces of the reducin rolls and artially embrace a reducing r0 1 along the line of contact therewith, thus preventing relative axial movement between each backing roll and the reducing roll engaged by it. I

The bac ing rolls are preferably of relatively large diameterascomparedto the reducv ing rolls, and are so constructed, both as to the body of the rolls and the roll necks, as to prevent appreciable deflection or yield under the stresses encountered during the rolling operation.

against lateral displacement and the inter- Each backing roll is so mounted that lateral or axial displacement is substantially prevented. As shown in the drawings, this is accomplished by providing two forms of bearings for each of the rolls, at least one of which operates in part as a thrust bearing in that it resists lateral or axial movement of the roll. With this arrangement the overhanging reducing rolls are reinforced by the rugged backing rolls so that the bearings of the reducing rolls are relieved of substantially all the working pressure to which the reducing rolls are subjected during the operation of the mill. An important feature of this invention is the fact that the backing rolls are held meshing engagement between the opposed and contacting surface of each reducing roll and its cooperating backing roll holds the reducing roll against lateral displacement during the operation of the mill. This, as is apparent from the drawings, results from the fact that the engagement of the convex and concave surfaces of the reducing and backing rolls, prevents the reducing rolls from moving laterally or axially relatively to the backing rolls, and consequently prevents relative lateral motion between the cooperating reducing rolls.

It will be apparent that the features above described may be included in rolling mills of 7 various design, and that therolls disclosed by the drawings are illustrative merely, since material variations may be made in the size and in the shape of the various rolls without departing from the spirit and intent of my invention. It will also be understood that the working grooves or matrices may be omitted from one or both rolls, depending upon the character of the products to be produced by the mill, or that each roll may be provided with two or more grooves.

As illustrated, the mill includes a frame 9, which essentially consists of a pair of standards 10 at the front of the machine, an intermediate pair of standards 11 and a rear extension 12 which terminates in a rear window 13. The various parts of the frame are cast or otherwise assembled into a rigid structure. The standards 10 are located on either side of forward window similar in function to the windows employed in the ordinary rolling mill. The standards 11 are located on either side of an intermediate window which also corresponds in function to the windows of theordinary mill. With this arrangement the mill is provided with three windows, the forward, the intermediate and the rear window.

As illustrated, each working roll 5 is mounted on the overhanging end. of a spindle 14:, which in turn is journaled in a specially formed bearing block 15. Each bearing block 15 is provided with spaced bearings 16 for the associated spindle and is so formed that it is per bearing box 15 is held in place by adjust-'

able members

17 and 18. The lower bearing box" is adjustably supported by

similar members

17a and 18a. With this arrangement the adjustable members are capable of holding the bearing boxes 15,and consequently the reducing rolls 5 in the desired vertical position.

Any suitable means may be-employed for adjusting the positions of these ad ustable members, and, as shown, each of the

members

17 and 17a is secured to its associated bearing block 15 by a socket connection and extends through a suitable guiding aperture formed in the frame. It is provided at its outer end with an operating wheel 20, having a screw thread engagement therewith and so mounted in thrust bearings that a turning of the wheel will shift the member in one direction or the other, thus adjusting the position of the forward end of the associated bearing box 15. It is apparent that ball and socket joints may be employed between the members 17 and the boxes 15 or any other form of connection which wi ll permit slight angular motion between the member and the box but will hold the box in the adjusted position. Each

member

18 and 18a is likewise provided with an operating wheel 21, but the wheel is mounted on the outer end of the member by means of a feather-key, so that it rotates with the member but is capable of moving or sliding along'the member. The member is threaded through a suitable aperture in the frame, so that its rotation changes its longitudinal position. With this arrangement, turning the wheel, shifts the longitudinal position of the member and thus positioning the outer end of the associated box 15 within its guides. These members 18 and 18ainstead of being linked or otherwise secured to the associated bearing boxes, merely abut against suitable lugs or abutments formed on the boxes.

In Fig. 3 I have diagrammatically shown operating connections for the

wheels

20 and 21. In both views of this figure the wheels are diagrammatically shown as worm gears and in the upper view, the two

wheels

20 and 21 are shown in connection with an arrange ment, wherein they may be operated separately. The wheel 21, meshing with a worm 22, carried on a shaft 23, which telescopes a hollow shaft 24. The shaft 24; carries a worm 25, which meshes with the gear 20. With this arrangement and with suitable operating levers or wheels for the shafts 23-and 24, the

ears 20 and '21 may be operated together or independently. In the lower view of Fig. 3,

- bores and that any approved means ay the worms 22a and 250; are shown mounted on thesame shaft 23a and consequently both wheels 20a and 21d are operated when the shaft is turned. Either method of turning the wheels and. of thereby adjusting the'posi tions of the bearing boxes 15 may be em ployed. The operating handles for the

wheels

20, 20a, 21 and 21a may be and preferably are placed at the front of the mill, so that the position of the reducing rolls 5 may be lreadily adjusted from the front of the mi 1.

The spindles 14 are shown tapered at their forward ends. This is for the purpose of simplifying the operation of mounting the reducin rolls 5 in place on the spindles and it is, 0 course, understood that these rolls are provided with correspondingly tapered employed for obtaining a rigid driving connection between the rolls and the spindles. It is desirable that each spindle be a driven spindle and for this reason both spindles are shown provided with coupling. boxes 27, but the coupling boxes are so arranged that each spindle is capable of shifting axially in its bearings.

The backing rolls are, of course, of rugged or strong construction. It is desirable to make them as short as practical between their necks or bearings and it is also desirable to provide them with large and relatively stifi' necks, the reasons for which are all clearly understood in rolling mill design. In Figure ;1 of the drawings I have shown each backing roll as provided with one straight bearing 28 and one double conical bearing 29. The double conical bearing is employed to resist lateral displacement of the backing roll during operation. Bearing boxes are provided for the backing roll and these boxes may be mounted in the forward and intermediate windows of the frame in the usual manner of mounting the rolls in a mill. It is, of course, understood that the bearing boxes are so formed that the rolls are aligned by the

standards

10 and 11, which form a way in which the lower bearing housings may be guided, during the operation of adjusting the positionvof the lower backing roll.

In the drawings I have shown the bearing housing. for both ends ofthe lower backing roll 7 a as forming one integral structure, viz.,

the bearing box structure 30. A similar bearing box structure 31 is also provided for the 7 upper backing roll 7. The backing roll 7a is vertically adjustable along the ways formed by the

standards

10 and 11 so as to efiectively'bring the backing rolls into operative relation with the reducing rolls. Any suitable structure may be employed for this purpose andin the drawings I have diagrammatlcally shown adjustable struts 32 for moving the bearing housing'30 to position and for supporting the housingv in position. As there shown, each strut is shown threaded through a suitable aperture in the mill frame and is rovided with an operating wheel 33, which 1s feather-keyed onto the strut near its lower' end. Each wheel is diagrammatically illustrated as a worm wheel, and is adapted to mesh with a separate worm mounted on a shaft 35. The shaft 35 is preferably operat-- ed from the front of the mill by a sultable hand wheel not shown.- With this arrangement the position of the bearing box 30 may be varied by turning the shaft 35, thereby varying the position of both struts, but it will be apparent that each strut may be independently adjusted.

As shown, the bearing box 30 is provided with flanges 30a along each side, which overlap the standards 10, and determine the posibe tion of the box 30 within the forward and intermediate windows. Clamps 30b act between the frame and the flanges to rigidly hold the box in the proper endwise or lateral position. The clamps are held in place by bolts which extend through slots formed in the clamps. It will,of course, be understood that the faces of the windows or standards are milled in'order to provide an accurate guide for the bearing box, and that the 00- operating portions of the box are also accurately milled.

The bearing box 31 for the upper backing roll is not vertically adjustable. It is adapted to be clamped and held in position againstthe upper arch 34 or cap of the mill. Its lateral position" is also important and for this reason I .have illustrated a mechanism 35 for adjusting the lateral position of the bearing box and for holding it rigidly in place. As

shown, the mechanism 35 consists of a plate 36 which is rigidly secured to the frame bymeans of bolts 3601 A sleeve nut 37 is threaded through this plate, and a tension bolt 38 extends through this sleeve. The bolt 38 is provided with a head 39 which engages a recess formed in the box 31-. The sleeve nut '37 abuts against the box -31 and .is provided n't. I

curately adjusted and the counter-action between the sleeve nut 37 and the bolt 38'will rigidly hold the box in the adjusted position. It will, of course, be understood that means such as the usual wedges 31a (Fig. 2) may be employed for forcing and holding the box-.31

upwardly against the arch or cap 34 014%10. frame. In Fig. 21 have also disclosed gui e clips 10a which,'if desired, maybeemployed as an additional means for rigidly holding the box in place.

As shown in Figure 1, the box- 31 is preferably made in two parts, for convenience. of removingv the roll 7 therefrom. The lower portion 31b of the box is preferably secured to the upper portion by means of bolts, not shown.

In a mill such as diagrammatically illustrated in Figs. 1 and 2 of the drawings, the reducing rolls may be readily changed for the purpose of rolling different forms of products but it will, of course, be understood that the peripheral faces of each reducing roll will correspond in contour so as to effectively cooperate with the backing rolls and thereby prevent accidental and undesired lateral displacement. It will also be understood that the usual practice will be adhered to in forming the working grooves or matrices in the rolls and that the rolls may be spaced apart to provide a definite predetermined roll set.

From the foregoing it is apparent that by providing the reducing rolls and their backing rolls with proper cooperating surfaces the reducing rolls may be effectively held in the desired position throughout the operation of the milland at the same time may be of relatively small diameter and mounted on sp1ndies of relatively small diameter, since the hacking rolls function to not only transmit substantially all the rolling pressure to the frame, but also to so hold the reducing rolls that appreciable lateral play or displacement of these rolls is prevented throughout the operation of the mill.

The fact that the reducing rolls are provided with convex reducing surfaces, whereas the cooperating and contacting backing rolls are provided with concave surfaces makes it apparent that there is necessarily a certain amount of sliding or slipping between the contacting surfaces of each reducing roll and its cooperating backing roll. It is apparent that the portions of the peripheral surfaces of the reducing rolls which are of greatest diameter travel at a greater peripheral speed than the portions of those surfaces of smaller diameter, whereas the reverse is true of the backing rolls. It is, therefore, apparent that the rolling -friction between each backing roll and its cooperating reducing roll is somewhat increased by reason of the fact that the rolls contact along a curved line or along hnes which are not parallel to the axes of the rolls. This slight increase in rolling friction cannot be avoided, but it can be minimized by prop- I erly proportioning the contacting surfaces and by so selecting the degree of convexity of the reducing rolls and the corresponding concavity of the backing rolls as to provide 1ust sufficient surface vto effectively prevent the lateral displacement of the reducing rolls without unduly increasing the pressure per inch between the reducing rolls and the backing rolls.

In Fig. 4 of the drawings I have shown a modified form of my invention, in which the peripheral surfaces of the rolls are somewhat different from-those of the rolls shown in Flg.

14 and the backing rolls 7 are mounted in roller bearings. It will be apparent that each spindle will be provided with two such bearings located and arranged as illustrated in Fig. 1, and that the spindles must be capableof moving laterally with relation to their bearings.

While the backing rolls 7' of Fig. 4 are somewhat different in contour from those shown in Fig. 1, the same principle is followed. Theintermediate portion of each roll is of reduced diameter so that there is no contact between the portion of each reducing roll and its cooperating backing roll immediately adjacent to the edges of the groove or matrix in the reducing roll. The lateral peripheral surfaces of the backing rolls are concave, increasing in diameter from the intermediate portion toward the ends of the rolls and along a curved line which corresponds to the lateral curvature of the convex peripheral faces of the reducing rolls. In this respect, the rolls are similar to those disclosed in Fig. 1 and byemploying such concave and convex surfaces as are illustrated. the axes of the reducing rolls may be out of parallel with the axes of the backing rolls, without damaging the surfaces of the rolls and without materially increasing the rolling friction between each reducing roll and its cooperating backing roll.

As previously stated, each spindle 14 is provided with two roller bearings 16 and each backing roll is provided with roller bearings 28' and 29'. As shown, the bearmgs 28 are especially constructed so as to conform in function to the double conical bearings illustrated in Fig. 1. This is accomplished by providing each bearing 28 with two sets of rollers in which the axes of the rollers of each set are inclined to those of the rollers of the other set, and so that the two sets of rollers cooperate with a double conical surface formed as a part of the roll neck, thus acting as a double thrust bearing and preventing appreciable lateral displacement of the backing roll. The bearings 29 are shown as straight roller bearings. It will, of course, be apparent that any form of anti-friction hearing may be employed so long as provision is made to prevent lateral displacement of the backing rolls.

The operation of assembling the rolls in a mill such as illustrated is somewhat similar to the corresponding operation in connection with an ordinary two-high mill. It is, however, desirable to properly locate the bearing box for the upper backing roll against the cap lower bearing box is then rigidly clamped in I position. The upper hearing box may then be adjusted laterally for the purpose of adj usting the upper reducing roll to the proper so, curved lines and I prefer forming the conomissions may be made in the apparatus illuslateral or endwise position with relation to the lower reducing roll. After'all the adjustments are properly made the reducing rolls will be held in the desired operating positions by the backing rolls and will be prevented from relative displacement with relation to each other by the coacting surfaces of their respective backing rolls.

It will be apparent that. the concave and convex surfaces of the backing rolls and reducing rolls may be tapered along curves other than those shown and described, It is preferable, however, to employ concave convex surfaces which are tapered along cave convex surfaces as illustrated and de-' scribed in connection with Fig. 4.

It will be apparent that various changes, substitutions, modifications, additions and trated without departing from the spirit and scope of my invention.

What I claim is:

1. In combinationina rollin mill, :1. pair of coacting reducing rolls, eac having peripheral surfaces which are .tapered from a circumference of large diameter at a point intermediate the ends of the roll to a circumference of smaller diameter at a point adjacent the end of the roll, and a-pair of cooperating backing rolls of larger diameter than the reducing rolls, each-such backing roll en,- gaging one, of said reducing rolls and so formed as to contact therewith along the tapered portion thereof.

2. In combination in a rolling mill, a pair of-coacting reducing rolls having peripheral faces which diverge along a curved line from a point adj acentthe throat of the rolls toward the ends thereof, and apair of cooperating backing rolls having peripheral surfaces so formed as toicontact with the peripheral surfaces of said reducing rolls along a curved line, whereby relative lateral motion is prevented between each reducing roll and its c'ooperating backing roll,and means. for limit- -ing lateral motion of the backing rolls during their'rotation.

3. In combination in a rolling mill, apair of coacting reducing rolls, each'cap'able of lateral movement along the line of the axis of" its rotation and'each having a peripheral surface tapering from a circumference adjacent the throat thereof to a circumference of smaller diameter adjacent the end thereof, and a pair of cooperating backing rolls, each having a peripheral surface substantially conforming in contour to the contacting peripheral surfaces of the coacting reducing rolls and correspondingly tapering from a circumference of small diameter at a point intermediate the ends of the backing roll to a circumference of larger diameter at a point adjacent the end thereof, and means for limiting axial movement of saidbacking rolls during their rotation. v

4. In combination in a rolling mill,'a pair of coacting reducing rolls, each having pe'- ripheral surfaces tapering along a curved line from a circumference adjacent the throat thereof toward circumferences of smaller diameter adjacent the ends thereof, and each so mounted in its bearings that it is capable of lateral or endwise movement durrolls, each having a lateral peripheral surface conforming in contour to lateral surfaces of its coacting reducing roll, means for driving said reducing rolls and means for opposing lateral motion of said backing rolls during their rotation.

'ing rotation, a pair of cooperating backing 5. In combination in a rolling mill, a pair of coacting reducing rolls, each overhanging its supportin bearings and each having a fperipheral sur acetapered from a circum erence intermediateits ends, to a circumference of smaller diameter adjacent its end, a pair of backing rolls cooperating with said reducing rolls and each provided with a peripheral surface tapered from a circumference of large diameter adjacent the end of the roll to a circumference of smaller diameter at a point intermediate the ends of the roll for cooperating with the tapered surface of the engaged reducing roll, and means for limiting the lateral or endwise movement of each backing roll during its rotation.

' 6. In combination in a rolling mill, a pair of reducing rolls, each overhanging its supporting'bearings and each capable of lateral or endwise movement during rotation and each having a peripheral surface tapering on a curved line from a circumference intermediate its ends to a circumference of smaller diameter adjacent its end, a pair of backing rolls, each provided with a peripheral surface tapering along a curved line from a circumference of large diameter adjacent an end of the roll to a circumference of small diameter intermediate the ends thereof for cooperating with the tapered surface of the hoacting reducing roll, and means'for limitin thelateral or endwise motion of each bac ing roll during its rotation.

having a forward, an intermediate and a rear 1 window, a pair of roll spindles, a separate bearing box of each spindle guided by the intermediate and rear windows and adjustable therealong to diiferent positions, a reducing roll carried on the overhanging end of each spindle, a pair of backing rolls cooperating with said reducing rolls, the contacting surface of each reducing roll and its cooperating backing roll being such as to op-,

pose lateral displacement of the reducing roll with relation to the backing roll, bearing boxes for said backing rolls mounted in the forward and intermediate windows of said frame, and at least one thrust bearing for each backing roll for opposing lateral or endwise movement thereof during its rotation.

9; In combination in a rolling mill, a pair.

of roll spindles, a separately adjustable bearing box for each spindle, a reducing roll carried by the overhanging endof each spindle, a pair of backing rolls cooperating with said reducing rolls, the contacting surface of each reducing roll and its cooperating backing roll extending at an angle to the axes of both rolls, a double tapered bearing for each backing roll, and means for adjusting the endwise position of one backing roll.

10. In combination in a rolling mill, a pair of roll spindles, means for separately adjust ing the position of each spindle, a reducing roll mounted on the overhanging end of each spindle, a pair of backing rolls cooperating with said reducing rolls, the contacting surfaces of each reducing roll and its cooperating baekin roll extending at an angle to the axes 0 both rolls, means for adjusting the lateral position of one of said backing rolls, and a thrust bearing for each backing roll.

1.1. In combination in a rolling mill, a pair of roll spindles, bearings therefor through which said spindles are endwise movable, a reducing roll mounted on the overhung end of each spindle,- a pair of backing rolls, the contacting surfaces of each reducing roll and its cooperating backing roll being so formed as to prevent lateral motion of each reducing roll relatively to its cooperating backing roll, means at the front of the mill for adjusting the vertical positions of said bearings, means at the front of the mill for adjusting the lateral position of one of said backing rolls, and thrust bearings for preventing endwise move.-

ment of both backing rolls during their rotation. I

12. In combination in a rolling mill, a pair of reducing rolls, a pair of backing rolls, the contacting surfaces of each reducing roll and its cooperating backing roll being such as to limit the relative endwise motion between each reducing roll and its cooperating backing roll, anti-friction thrust bearings for said backing rolls and means for adjusting the lateral position of one backing roll.

13. In combination in a rolling mill, a pair of reducing rolls, each reducing roll being so journaled that it is capable of endwise motion, and having a convex peripheral surface tapering along an arc of a circle from a circumference of large diameter at a point intermediate the ends of the roll to a circumference of smaller diameter at a point adjacent the end of the roll, a pair of backing ro ls, each having a. corresponding concave peripheral surface tapering along an arc of a circle from a circumference of large diameter adjacent the end of'the roll to acircumference of smaller diameter at a point intermediate the roll, means for opposing endwise movement of each backing roll during its rotation and means for adjusting the lateral position of one of said backing rolls.

14. In combination in a rolling mill, a pair of reducing rolls, each so journaled that it is free to move endwise, a separate backing roll cooperating with each reducing roll, the contacting peripheral surfaces of each reducing roll and its cooperating backing roll being so formed as to oppose relative endwise motion between the rolls, means for opposing the endwise motion of each backing roll during its rotation and means for adjuiiting the endwise position of one backing ro 15. In combination in a rolling mill, a pair of roll spindles, bearings therefor in which the spindles are free to move in an endwise direction, means for adjusting the vertical positions of said bearings, a reducing roll mounted on the overhung end of each spindle, aseparate backing roll cooperating with each reducing roll, the contacting peripheral surface of each reducing roll and its cooperating backing roll being so formed as to oppose endwise motion of each reducing roll relatively to its cooperating backing roll, means for opposing the endwise motion of each backing roll and means for adjusting the endwise position of one backing roll.

16. In combination in a rolling mill, a pair of reducing rolls,'each so journaled that it is movable endwise with relation to its bearings, bearings for said rolls, means for adjusting the relative positions of said bearings, a separate backing roll cooperating with each reducing roll, the contacting surfaces of each reducing roll and its cooperating hacking roll being such as to oppose relative of reducing rolls, each so journaled that itis' movable endwise with relation to its bearings, bearings for said rolls, means for adjusting the relative positions of said bearlngs, a separate backing roll cooperating with each reducing roll, the contacting surfaces of each reducing roll and its cooperating backing roll being such as to oppose endwise relative motion between the cooperating rolls, and means for opposing the end wise motion of the backing rolls during their rotation. I

18. In combination in a rolling mill, a

frame, a pair of roll spindles, separately ad- 'justable bearings for said spindles mounted on the frame, a reducing roxl carried by the overhanging end of each spindle, a separate backing roll cooperating with each reducing roll, bearings for the backing rolls mounted.

on said frame, means for adjusting the position of the bearings of one such backing roll along said frame, and means for adjusting the positions of said spindle bearings along said frame. g

19. In combination in a rolling mill, a pair of reducing rolls, separate bearings for said rolls, means for adjusting the relative positions of said bearings, a separate backing roll for each reducing roll, adjustable means for adjusting the endwise position of one reducing roll relatively to the other, and means for opposing endwise movement of said rolls during their rotation.

20. In combination in a rolling mill,'a pair of reducing rolls, each so journaled that it is free to move endwise through its bearings, separate bearings for said rolls, means for adjusting the positions of said bearings, a separate backingdoll for each reducing roll, means for adjusting the position of one such backing roll toward and away from the other backing roll, means for adjusting the endwise position of one such reducing roll relativelyto the other during the operation of the mill, and means for opposing the relative-endwise movement of said reducing rolls during their rotation.

21. In combination in a rolling mill, a frame having a forward, an intermediate and a rear window formed therein, a pair of roll spindles, a separate bearing boxfor each spindle, guided by the intermediate and rear windows of the frame, means for adjusting the position of eachs'uch box along said windows, areducing roll carried by the over- I hanging end of each spindle, a separate backing roll for each reducing roll, bearing boxes for the backingrolls mountedin the forward and intermediate windows of the frame, and means for adjusting the position of one such backing roll along said front and intermediate windows. I

22. In combination in a rolling mill, a frame having bearing guides formed therein, a pair of roll'spindles, bearing boxes for said spindles mounted in bearing guides in said frame, a reducing roll mounted on the overhanging end of each such spindle, means for adjusting the position of each such bearing box along its cooperating bearing guides, a separate backing roll for each reducing roll, bearings for each backing roll movable along bearing guides of the frame, means for lock- 7 ing the bearings of one such backing roll in osition on said frame, and means foradthe position of the bearings of the justing) other acking roll along the-cooperating roll for each reducing roll, each backing'roll having peripheral surfaces conforming 1n contour .to the peripheral surface of the cooperating reducing rolls, andmean for opposing the lateral motion ofsai backing rolls during their rotation, A

24. In combination in a rolling mill, a pair of roll spindles, bearings therefor through which the spindles are movable longitudinally, means for adjusting the positions of said bearings, a reducing roll mounted on the overhung end of each spindle, a separate backing roll for each reducin roll, the contacting peripheral surfaces 0 each reducing roll and its cooperating backing roll being so formed as to oppose relative endwise motion between said cooperating rolls, and v means for opposing endwise motion of each backing roll during its rotation.

25. In combination in a rolling mill, a frame, a pair of roll spindles journalled in said frame, means for adjusting the position of one such spindle with relation to the other,

a separate reducing roll mounted on'the overhanging end of each such spindle, a separate backing roll for each reducing roll j ournalled in said frame, means for adjusting one such" backing roll toward and away from the other, and means for opposing endwise movement of said rolls during their rotation.

:26. In combination in a rolling mill, :1.

. frame, a pair of roll spindles, spaced bearings for each such spindle, carried by said frame, means for adjusting the position of the bearingsof one such spindle within said. frame,

- a separate reducing roll mounted on the overhanging end of each such spindle, a separate backing roll for each reducing roll and means I for adjusting one backing rolltoward and away from the other backing roll.

27. In combination in a rolling mill, a

frame, a pair of'roll spindles journalled. in

. its cooperating backing roll being such as to oppose endwise lateral motion between the cooperating rolls, means for adjusting the endwise position of one such backing roll during the operation of the mill, means for adjusting one such backing roll toward and away from the other, and means for opposing endwise lateral motion of said backing rolls during their rotation.

28. In combination in a rolling mill, a frame, a pair of roll spindles journalled in said frame, a separate reducing roll mounted on the overhanging end of each such spindle, at least one of said rolls having a working groove formed therein, a separate backing roll for each reducing roll journalled in said frame, at least one such backing roll being recessed opposite the groove in its cooperating reducing rolls and the contacting surfaces of such reducing roll and its cooperating backing roll being such as to oppose-endwise motion between the cooperating rolls, means for adjusting the position in said frame of one such backing roll toward and away from the other backing roll, means accessible during the-operation of the mill for adjusting the 40 endwise position of one such backing roll and means for opposing endwise motion of said backing rolls during their rotation.

29. In combination in a rolling mill, reducing rolls, bearings therefor, means for adj usting the relative positions of said bearings, a backing 'roll for atleast one of said reducing rolls, the contacting surface of such backingroll and its cooperating reducing roll being such as to oppose relative endwise motion between such rolls, means for adjusting the endwise-position of such backing roll to adjust the endwise position of the cooperating reducing roll, means for adjusting the operating position of one reducing roll toward and away from the other, and means for opposing endwise movement of saidrolls during their rotation.

I 30. In combination in a rolling mill, a

frame, a roll spindle journalled in said frame,

means for adjusting the angular position of said spindle, a reducing 'roll mounted on the overhanging end 'ofvsaid spindle and capable of endwise movement, a backing roll for said reducing roll, the contacting surfaces of said rolls being such as to oppose relative endwise motion between said rolls, means for adjusting the endwise position of said backing roll to adjust the endwise position of said reducing roll, a second reducing roll journalled in I said frame, means for adjusting the operating position of one reducing roll toward and away from the other, and means for opposing endwise movement of said rolls during their rotation.

In testimoriy whereof, I have hereunto described my name this 17th day of October, 1930. 4 1

WARREN WQRTHINGTON.