US1488909A - Rolling mill - Google Patents

Description

April 1 1924. 1,488,909

H. H. DIEHL ROLLING MILL Filed Oct. 23. 1922 t l Aprili 11 19% msww H. H. DIEHL ROLLING MILL 1922 4 Sheets-Sheet 2 H. H. DIEHL ROLLING MILL Aprifi 1 1924..

Filed Oct. 23, 1922 4 sheets-spam 4.

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Patented Apr. 1, 1924.

UNITED STATES 1,488,909 PATENT OFFICE.

HERMAN H. DIEHL, OF HUNTINGTON, WEST VIRGINIA, ASSIGNOR TO THE WEST VIR- GINIA RAIL COMPANY, OF HUNTINGTON, WEST VIRGINIA, A CORPORATION OF WEST VIRGINIA.

ROLLING MILL.

Application filed October 23, 1922. Serial No. 596,416.

To all whom it may concern:

Be it known that I, HERMAN H. DIEHL, a citizen of the United States, residing Huntington, in the county of Cabell and State of West Virginia, have invented a new and useful Improvement in Rolling Mills,

of which the following is-a specification.

My invention relates, more particularly, and especially as to certain features thereof, to. rolling-mills of the type adapted for the rolling of bars into shape, as for example in the manufacture of railway rails, and which involve in their construction the provision of so-called rest-bars carrying side-guards which extend inwardly beyond the portions of the rolls of greatest diameter, and also carry guides, these side-guards and guides co-operating with the object to be rolled.

As rolling-mills have hitherto been constructed the rest-bars, carrying the guides and side-guards, are so related to the other parts of the rolling-mill structure that it is necessary in the operation of displacing the side-guards and guides, as for example where the object being rolled becomes wrapped about the rolls, or the side-guards and guides become damaged, or the side-guards and guides are required to be moved to different positions along the rest-bars, as for example in the changing of passes, to bodily remove the rest-bars from the rolling-mill housings by the manipulation of the bars in such a manner as to require that the sideguards and guides be removed from the restbars before the'latter may be removed from the housings. This requirement presents many disadvantages among which are the excessive time and labor, with consequent expense, involved, and the excessive time during which the rolling-mill is out of commission. A further disadvantage is pre-w sented in that before the guides, side-guards and rest-bars. may be removed from the apparatus, the bars being rolled. in the event of the same becoming wrapped about a roll, become so cool before access may be had thereto for removing them from the rolls,

that their removal is rendered very difficult and is liable to result in impairment of the rolls.

Not only is the operation of stripping the guides and side-guards from the rest-bars one requiring a relatively great length of time, butthe operation of reassembling the parts also consumes much time. all of which greatly adds to the expen'se of the operation of rolling-mills.

Furthermore in rolling-mills as hitherto provided, it is necessary in the installing of rolls of different diameters to use sideguards and guides of different lengths, inasmuch as the rest-bars for these guards and guides are non-adjustable toward and away from the rolls. This practice not only requires that guards and guides of different lengths be kept in stock, with consequent expense, but has also led to the undesirable practice of the Workman, in the case of a change of rolls, grinding the guards and guides of greater length to adapt them to fit the particular diameter of rolls installed in the housings.

Furthermore in the operation of rollingmills the bars being rolled some times strike the bolts through the medium of which the guards and guides are secured on the rest bars, thereby rendering very difficult the removal of the nuts from the bolts in the op eration of removing the guides and guards from the rest-bars.

My primary object is to provide improvements in rolling-mil1 structures, which shall be of simple and economical construction and through. the incorporation of which in a rolling-mill structure, the disadvantages presented by rolling-mills as hitherto provided, shall be overcome.

More specifically stated certain of my objects are to provide a construction of rolling-mill wherein the rest-bars, guides and guards may be adjusted toward and away from the rolls, and entirely removed from the housings, without requiring the disassembly -of the rest-bars, guides and guards; to provide for the introduction of the rest-bars into position in the housings with the guards and guides preliminarily assembled with the rest-bars; to provide for the securing of the rest-bars in any desired position of adjustment toward or away from the rolls, thereby to eliminate the necessity of providing guides and guards of different lengths for different diameters of rolls; to provide for the securing of the rest-bars in the housings in any desired position of vertical adjustment, thereby to adapt the side-guards and guides to extend in the desired horizontal plane regardless of the diameters of the rolls; to provide for the ready adjustment of the side-guards and guides to different positions along the rest-bars without requiring the disassembly of the guards and guides from the bars, as for example in the case of a change of passes; and other objects as will be manifest from the following description.

Referring to the accompanying drawmgs:

Figure 1 is a view in front elevation of a rolling-mill constructed in accordance withv my :invention with the rolls of such form as to adapt them for the rolling of railway rails which latter are shown in section. Figure 2 is a section taken at the line 2-2 on Fig. 1 and viewed in the direction of the arrow. Figure 3 is a plan view of the rolling-mill structure, with the rails, shown in position between the rolls in Fig. 1, omitted. Figure 4 is a broken plan, sectional, view of a portion of the machine showing a detail of the retaining meansfor the rest-bars. Figure 5 is a section taken at the line 5-5 on Fig.1 and viewed in the direction of the arrows. Figure 6 is a section taken at the line 6-6 on Fig. 1 and viewed in the direction of the arrows. Figure 7 is a perspective View of one of the similar rest-bars employed. Figure -8 is a perspective View of one of the similar fillers used in connection with the rest-bars in the adjustment of the latter toward and away from the rolls. Figure 9 is a perspective view of one of the similar wedge-keys employed and forming a part of the means for holding the restbars against displacement; Figure 10 is-a perspective view of a bolt forming a part of the means for holding in place the wedge block which holds the rest-bar in place. Figure-11 is a perspective view of one of the similar keys for removing the wedges of Fig. 9 from a. position in which the restbars are held in place; and Figure 12, a face View of the inner surface of a portion of the housing.

I have chosen to illustrate my invention, in the accompanying drawings, as applied to arolling-mill adapted for the rollin of railway rails and involving in the rol ing operation, the passing and repassing of the rail through the rolls, to roll the rail, by a succession of rolling operations, into the desired form.

The rolling-mill shown, as to its general features of construction, is the same as that commonly used, involving a pair of base referred to and which are journaled in the,

housings 13 in any suitable way, as for example in accordance with common practice, operate as feed rolls and also as. orming rolls, power being applied thereto to effect the functioning as stated. For example, and in accordance with common practice, each roll 14, 15 and 16 may be provided with pinions (not shown) driven from power applied to any one of the pinions. The pinions and the manner of rotating the pinions are not shown as this is common practice and does vnot form any part of the present invention.

The peripheries of the various rolls are of such form, as shown, as to provide therebetween a plurality of passes between the roll'15 and each of the rolls 14 and 16, it

being noted that five passes are provided between the roll 15 and each of the rolls 14 and 16. These passes progressively narrow from the first entering pass to the last delivering pass, the cross-sectional contour of the latter corresponding with the cross-sectional contour of the rail in its finish-ed condition to be rolled therein. It may be here stated that in the use of the rolling-mill alternate ones only of the passes referred to are used during the rolling of a single rail, the passes which are used and are located at the upper surface of the roll 15 being those which alternate with the passes which are used at the under-side of the roll 15, as illustrated in Fig. 1, wherein the passes being used, by way of illustration are shown as containing rails shown in cross section. By virtue of the shape of the object to be formed in the rolling operation, the various rolls referred to adjacent the walls of the passes, are inset relative to the extreme outer periphery of the rolls.

Referring now to those features of the construction which constitute my improvements; the apparatus also involves a plurality of rest-bars represented at 17, these rest-bars serving as the supports for the side-guards and guides as also the objectsupports at the entering sides of the upper passes. The side-guards referred to and which are provided to serve as a means for properly holding the rail against lateral displacement in the introduction of the rail into the passes and in its passage therethrough, and which are located at opposite sides of each pass, are represented at 18. 19. 20 and 21, the guards 18 being located adjacent the entering passes at one side of the structure, the guards 19, being located at the delivery ends of these passes at the opposite side of the structure, the guards 20, being located at the entering side of the upper passes, and the guards 21, at the delivery side of these last referred to passes. The side-guards 18, are shown as each formed of the side members .22 and 23, each member 22 having a base-like extension 24. The sections 22 and 23 which are connected together as through the medium of bolts 25, rest upon the adjacent rest-bars 17 and are rigidly, yet adjustably, secured thereto, by means of bolts 26, the headed, lower. ends of these bolts extend ing through blocks 27, which extend across the under-sides of the rest-bars. The construction of side-guard structure at the entering ends of the upper passes, these side-guards being represented at 20, are of the same general construction as the sideguards 16, except that, instead of being super-posed on the rest-bars, they are dependingly mounted thereon, the bolts which hold the sections of these side-guards together, and corresponding with the. bolts 25, being represented at 28, and the bolts which hold the side-guards on the bar 17 and correspond with the bolts 26, being represented at 29. The side-guard structure 20 also differs from the side-guard structure 18, in that the former also involves a cross-plate 30 spanning the space between the spacedapart sections of the side-guards and above which the rail extends in the introduction of the latter into the passes and the travel of the same therethrough.

The side-guard structures 19, arranged at the delivery ends of the lower passes, are each formed of the sections 31 and 32, each pair thereof being located at the opposite side of the pass adjacent to which it extends, and in position to guide the rail against lateral deflection. these sections surmounting the rest-bars 17 provided for their support and being adjustably secured thereto, as through the medium of the bolts carried by these sections and extending at their lower, headed, ends through the ends of the blocks 34, fitting against the under side of this rest-bar. The side-guard structures 21, located at the delivery side of the upper passes, are of the same general construction as the side-guard structures 19, except that instead of surmounting the restbar with which they cooperate, they are dependingly supported therefrom through the medium of the bolt and block devices 35 and 36 and corresponding with the bolts and blocks 33 and 34, respectively, of the sideguard structures 19.

The delivery side of each pass is provided with guide-means which cooperate with the rolls at the portions thereof forming the passes, and which extend into such position that should the object being rolled, start to curl at the portion thereof extending beyond the pass, it will engage these guide-means and he forced to remain in straight condition. Referring to the guide-means which are associated with the side-guard structures 19, these guide-means each comprise an upper guide member 37, and a lower guide-member 38. The upper a cross-bar 54 supported guide-members 37 are recessed at their upper surfaces as represented at 39, at which portions they straddle lugs 40 extending laterally from the sections 31, the forward ends of these guards being drawn upwardly into the desired contact with the under-side of the roll 15, as shown, by links 41, ivoted at their lower ends to the sections 3 and,

hooked over the ends of levers 42, which are pivoted between their ends on the lower ends of links 43, carried by a shaft 44, mounted in bosses 45, provided on the inner surfaces of housings 13, the outer ends of the levers 42 being provided with weights 46, which maintain the guide sections 37, in raised position. The lower guard sections 38 contain recesses 47 in their undersides adjacent their outer ends at which recesses they bear upon the adjacent rest- .the inner ends of the sections 48, and hooked at their upper ends over the ends of levers 52, which are pivoted between their ends to the lower ends of links 53 depending from at its opposite ends in bosses 55 on the inner surfaces of the housings 13, the outer ends of the levers 52 being provided with weights 56 which operate to maintain the inner ends of the sections 48 in engagement with the under-surface of the roll 14. The guard-sections 49 are supported at their outer ends in channels 57 provided in the upper surfaces of lateral extensions 58 of the side-guard sections, the outer extremities of the guidesections 48 terminating in depending lugs 48 which overlap theouter ends of the section of the side-guards in which the guides 49 are located. The inner ends of these guides rest upon the upper surface of the roll 15 at the lower edges of the passes between this roll and the roll 14.

It will be understood that the inner ends of the various side-guards and guides are so shaped, as shown, as to generally conform to the contour of the portions of the rolls which they oppose, the inner ends of these members to this end being tapered as shown.

In accordance with the preferred embodiment of my invention, I provide in the opposed inner surfaces of the housings 13, at opposite sides of the rolls 14, 15 and 16, horizontally extending recesses 59 which open through the outer edges of these housings. as shown. The recesses 59 are provided for the purpose of receiving the rest-' a movement of these rest-bars toward the rolls, while maintaining the rest-bars in pararallel relation to the rolls, the distance between the inner walls of the recesses in one of the housings and the opposing inner walls of the recesses in the other ofthe housings, being preferably slightly greater than the length of the rest-bars. The rest-bars carryin the side-guards and guides, as hereinbe ore ex lained, seat upon the lower horizontal 1e ges afforded by the recesses 59, fillers, as desired, being inter-posed between the under-sides of these rest-bars and the ledges referred to, to cause these bars to extend at the desired elevation.

The rest-bars 17, are clamped in position against the inner end walls 60 of the recesses 59, with fillers, represented at 61, inter-posed therebetween, by means of clamping wedges represented at 62. In this connection it may be stated that the ends of the rest-bars 17 are of reduced thickness, as represented at 63, the surfaces thereof represented at 64 and which oppose the inner walls 60 of the recesses 59, or the fillers 61, as the case may be, being flat and parallel with the front and rear surfaces of the body of the bar 17, whereas the opposite surfaces of the portions 63 incline outwardly and rearwardly, as represented at 65. .The wedges 62 are provided for cooperation with the wedging surfaces 65, these wedges being insertable into slots 66 provided in the housings 13 and extending entirely therethrough in a direction cross-wise of the recesses 59, whereby the slots 66, intersect these recesses. The slots 66, are of greater height than the recesses and extend both above and below the planes of the upper and lower walls of these recesses, as represented more particularly in Fig. 2. The Wedges 62, are of greater height than the recesses 59, these wedges being of substantially the same height as the slots 66, into which they are insertable, the ends of the wedges, which in the assembling of the parts extend into the slots 66 and engage with surfaces 65 of the bar 17, being tapered as represented at 67, throughout a height corresponding with the height of the recesses 59. It will be understood from the foregoing that when the rest-bars 17 are in place, as stated, and the wedges 62 are inserted into position in the slots 66 the surfaces 67 and 65, will mutually engage and the bars 17 will thus be held rigidly in place in the" housings. It is desirable that some means be provided for releasably holding the wedges 62 in the position stated, a desirable means for this purpose being shown in Fig. 4, and involving a bolt 68 eeegooe extending into thehousings 13, adjacent the wedge 62, and interlocked, at its head 69, with the housings in amanner to prevent longitudinal displacement of the bolt 68, there being located upon this bolt a clip 70 through which the bolt freely extends, this clip flatwise engaging the outer end of the wedge 62 and being engaged by a nut 71 which screws upon the bolt 68 and through themedium of which the clip 70 firmly bears against the outer end of the said wedge, thereby holding the latter against displacement. The wedges 62 are shown as containingapertures 72 adapted to receive wedge pins 7 3 (Fig. 11) which operate when driven into place in the openings 72 to wedge the members 62 out of engagement with the'rest-bars 17 when it is desired to adjust the position of the latter or to remove the same from the mill housing.

It will be noted particularly from Fig. 2 that the recesses 59, shown in substantially the same horizontal plane as of the roll 15, are unpro-vided with rest-bars. While these recesses are of no utility where the particular illustrated arrangement of rolls is employed, nevertheless they are of utility where other arrangements of rolls within the housings shown, are provided, the housings as illustrated, being thus shown adapted for difierent arrangements of rolls.

It will be readily understood from the foregoing that when it becomes necessary to remove the rest-bars, guides and sideguards, this may be readily and easily accomplished by the operator knocking the wedges 62 out of position, and thereupon sliding the rest-bars, with the guides and guards undisturbed thereon, outwardly in the recesses 59, in a direction away from the rolls, this feature of the invention permitting of the bars being moved while maintaining parallel relation between them and the rolls. This feature is not only of advantage in that a great saving of time is accomplished, by reason of the fact that the side-guards and guides are not required to be disassembled from the rest-bars before the latter are displaced, but also is of great advantage where, as for example, the object being rolled, through impairment of a guide, becomes wrapped about one of the rolls, as the rest-bars and the parts carried thereby may be quickly moved out of a position in which they obstruct free access of the workman to the roll for removing the object wrapped thereon, and which it isdesirable be removed as soon as possible and while in heated condition.

Furthermore, by my constructioh the rest-bars with guides. and guards assembled stituting' for impaired rest-bars, whereby much saving in time is accomplished.

Again where it is necessary that the guards or guides be adjusted into difierent positions along the rest-bars,as for example in case of a change of passes it is not necessary that any of these parts be entirely disconnected from the rest-bars, but it is necessary only that the securing means for the particular parts to be adjusted be loosened, the rest-bars having first been slid outwardly inthe recesses 59 to a position in which the parts to be adjusted lengthwise of the rest-bar will be out of overlapping position relative to grooved parts of the rolls, and the parts to be adjusted on the restbars slid along the latter to the desired position, and thereafter clamped thereon and i the rest-bars pushed back toward the rolls into proper position. This operation not only presents the advantage of requiring the minimum amount of time for making the necessary adjustment but, by not requiring the entire removal of the clamping nuts, is not hindered by the jamming of the threaded ends of the bolts which oftentimes occurs in practice and which presents seri ous obstruction to the entire removal of the nuts.

The feature of providingfor the adjustment of rest-bars toward and away from the rolls is of advantage as thereby the proper guarding and guiding of objects being rolled may be accomplished in the use of rolls of different diameters; and the fea; ture of providing for the adjustment of the rest-bars 17 into different elevations adapts the apparatus for the proper guarding and guiding of the objects being rolled where the position of any of the rolls, in a vertical plane, is caused to vary, as for example, where rolls of one size are substituted for rolls of another size, and particularly where one of the rolls, as for example the roll 15, is journaled in stationary bearings and the axis upon which this roll rotates, regardless of the size of roll employed, remains at the same elevation.

While I have illustrated and described a particular construction embodying my invention, I do not Wish to be understood as intending to limit it thereto as the same may be variously modified and altered without departing from the spirit of my in vention.

What, I claim as new, and desire to secure by Letters Patent, is: g

1. In a rolling mill, the combination of a roll housing, rolls journaled thereon, a rest bar and side-guards on said bar, said rest bar being supported on said housing and movable toward and away from said rolls while assembled with said guards.

2. In a rolling mill, the combination of aroll housing, rolls journaled thereon, a

rest bar and guides on said bar, said rest bar being supported on said housing and movable toward and away from said rolls while assembled with said guides.

3. In a rolling mill, the combination of a roll housing, rolls journaled thereon, a rest bar and side guards and guides on said bar, said rest bar being supported on said housing and movable toward and away from said rolls while assembled with said guards and guides.

4;. In a rolling mill, the combination of a roll housing, rolls journaled thereon, said housing containing ledges at its opposite sides, a rest bar and side guards on said bar, said rest bar being supported on said ledges, the distance between the sides of said housing being such as to permit said bar to be moved along said ledges toward and away from said rolls.

5. In a rolling mill, the combination of a roll housing, rolls journaled thereon, said housing containing ledges at its opposite sides, a rest bar and guides on said bar, said rest bar being supported on said ledges, the distance between the sides of said housing being such as to permit said bar to be moved along said ledges toward and away from said rolls.

6. In a rolling mill, the combination of a roll housing, rolls journaled thereon, said housing containing ledges at its opposite sides, a rest bar and side guards on said bar, said rest bar being supported on said ledges, the distance between the sides of said housing being such as to permit said bar to be moved along said ledges and removed from, and replaced on, said ledges while maintaining said bar substantially parallel with said rolls.

7. In a rolling mill, the combination of a roll housing, rolls journaled thereon, said housing containing ledges at its opposite sides, a rest bar and guides on said bar, said rest bar being supported on said ledges, the distance between said housing being such as to permit said bar to be moved along said ledges and removed from, and replaced on, said ledges while maintaining said bar substantially parallel with said rolls.

8. In a rolling mill, the combination of a roll housing, rolls journaled thereon, a rest bar supported at its opposite ends in the sides of said housing and movable toward and away from said rolls while maintaining substantially parallel relation thereto, and means for holdin said rest bar in place.

9. In a rolling mill, the combination of a roll housing, rolls journaled thereon, a rest bar supported at its opposite ends'in the sides of said housing and movable toward and away from. said rolls while m'aintainin substantially parallel relation thereto, an

wedge means for holding said rest bar in place.

Kit

10. In a rolling mill, the combination oi a roll housing, rolls journaled thereon, a rest bar supported at its opposite ends in the sides of said housing, said housing contain ing ledges at its opposite sides on which said rest bar is supported, said housing bein so constructed and arranged that said rest ar be moved toward and away from said while maintaining substantially parallel relation thereto, said housin containing openings extending crosswise o said ledges and means in said openings for holding sai rest bars in position.

11. In a, rollin mill, the combination of a roll housing, rofis journaled thereon, a rest bar supported at its opposite ends in the sides of said housing, said housing contain ing ledges at its opposite sides on which said rest bar is supported, said housing being so constructed and arranged that said rest bar may be moved toward and away from said rolls while maintaining substantially parallel relation thereto, said housing containing openings extending crosswise of said/ ledges, and wedge devices in said openings and engaging said rest bar for the purpose set forth.

12. In a rolling mill, the combination of a roll housing, rolls journaled thereon, a rest bar supported at its oppositeends in the sides of said housing, said rest bar having wed e surfaces, and devices movable on said ousing for en aging said wedge surfaces for holding sai rest bar in position.

13. In a rolling mill, the combination of a roll housing, rolls journaled thereon, a rest bar supported at its opposite ends in the sides of said housing, sald housing containing ledges at its opposite sides on which said rest bar is su ported, said housing being so constructs and arranged that said rest bar may be moved toward and away from said rolls while maintaining substantially parallel relation thereto, said housing containing openings extending crosswise of said ledges and said .rest bar havin wedge surfaces, and devices movable in sai openings and engaging said rest bar for holdin the latter in position. v

14. -n a rollin mill, the combination of a roll housing, rol s journaled thereon, a rest bar supported at its opposite ends in the sides of saidhousing, said rest bar havin wedge surfacesflmd devices movable on sai housing and presenting wedge surfaces for enga ing the wedge surfaces on said rest bar or holding the latter in position.

15. In a rolling mill, the combination of a roll housing, rolls journaled thereon, a rest bar, said housing containing recesses at its opposite, inner, sides afi'ording ledges, and containing openings which extend crosswise of said ledges and open through said re cesses, said rest bar being supported at its ineaeoe ends on said ledges, and clamping blocks movable in said openings against the end portions of said rest bar and extending in a vertical direction beyond said rewsses.

16. In a rolling mill, the combination of a roll housing, rolls journaled thereon, a rest bar, said housing containing recesses at its opposite, inner, sides afiording ledges, and containing openings which extend croswise of said ledges and open through said recesses, said rest bar being supported at its ends on said ledges, and clamping blocks movable in said openings and against the end portions of said rest bar and extending in both directions vertically beyond said recesses.

17. In a rolling mill, the combination of a roll housing, rolls journaled thereon, said housing containing recesses in its opposite' inner sides and presenting ledges on which said rest bar is supported, the end portions of said rest bar opposing the end walls of said recesses, said rest bar being movable toward and away from said rolls along said led es while maintaining substantially paralle relation with said rolls, said housing containing openings extending crosswise of said ledges and opening through said recesses, and means movable in said openings and against the surfaces of said rest bar opposite those which oppose the end walls of saiid recesses, for holding said rest bar in p ace.

l8. In a rolling mill, the combination of a roll housing, rolls journaled thereon, said housing containing recesses in its opposite inner sides and presenting ledges on which said rest bar is supported, the end portions of said rest bar opposing the end walls of said recesses, said rest bar being movable toward and away from said rolls along said ledges while maintaining substantially parallel relation with said rolls, said housfiig containing openings extending crosswise of said ledges and opening through said recesses, said openings being of greater height than said recesses and extending above and below the upper and lower walls of said recesses, and blocks movable in said openings and engaging the surfaces of said rest bar opposite those which 0 pose the end walls of said rece'sses,-for ho ding said rest bar in place. 7

19. In a rolling mill, the combination of a roll housing, rolls journaled thereon, said housing containing recesses in its opposite inner sides and presenting ledges on which said rest bar is supported, the end portions of said rest bar opposing the end walls of said recesses, said rest bar being movable toward and away from said rolls along said ledges while maintaining substantially parallel relation with said rolls, said housing containing openings extending crosswise of said ledges and opening through said re- Lasagna cesses, said openings being of greater height than said recesses and extending above and below the upper and lower walls of said recesses, the surfaces of said rest bar opposite those which oppose the end walls of said recesses, being of wedge shape, and wedge blocks movable in said openings and engaging at their wedge surfaces with the wedge surfaces of said rest bar for holding the latter in place.

20. In a rolling mill, the combination of a roll housing, rolls journaled thereon, a rest bar supported at its opposite ends in the sides of said housing, said rest bar being adjustable both up and down on said housing and in and out relative to said rolls, and

means for holding said bar in adjusted po-'.

sition.

21. In a rolling mill, the combination of a roll housing, rolls journaled thereon, a rest bar supported at its opposite ends in the sides of said housing and movable toward and away from said rolls While'maintaining substantially parallel relation thereto, devices engagingsaid rest bar for holding the latter in position, and means on said housing for holding said devices against rest bar, guides on said bar, said rest bar being supported'on said housing and movable toward and away from said rolls whileassembled with said guides, and meansfor holding said bar in adjusted position.

24. In a rolling mill, the combination of a roll housing, rolls journaled thereon, a rest bar, side guards and guides on said bar, said rest bar being supported on said housill) ing and movable toward and away from said rolls while assembled with said guardsand guides, and means in adjusted position.

for holding said bar HERN H. DIE.

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