US1972158A - Attachment for rolling mills - Google Patents

Description

p 4, 1934- s. T. MORELAND 1,972,158

ATTACHMENT FOR ROLLING MILLS] Filed 'Aug. 3 1, 1933 110.5 flrramvnfs,

Patented Sept. 4, 1934 ATTACHMENT FOR ROLLDNG MILLS Stephen T. Moreland, Canton, Ohio, assignor to The 'limken Roller Bearing Company, Canton, Ohio, a corporation of Ohio Application August 31, 1933, Serial No. 687,568

11 Claims. (Cl. 8038) apart by the work passing therethrough, theywill contact with and drive the back-up rolls.

On the other hand, in the ordinary mill, when the work rolls are idling, they are likely to rub against the back-up rolls butwith a pressure insuflicient to develop enough friction to turn the back-up rolls. This condition is likely to result in grinding flat strips lengthwise of the backup rolls and such flat strips are reflected in unevenness of the work and require frequent dressing of the back-up rolls. The principal object of the present invention is to maintain frictional driving engagement between the work rolls and back-up rolls even when the work rolls are idling. The invention consists in a device hereinafter described for attachment to the necks of the work rolls for yieldably pressing such work rolls against the back-up rolls. It also consists in the 26 parts and in the combinations and arrangements of parts hereinafter described and claimed.

In the accompanying drawing, wherein like numerals refer to like parts wherever they occur,

Fig. 1 is a side view of my device applied to a pair of work rolls, with the back-up rolls and frame of the mill indicated diagrammatically;

Fig. 2 is a vertical cross-sectional view of my device on the line A--A of Fig. 1;

Fig. 3 is a detail view of the floating connection for attaching my device to the frame of the mill;

Fig. 4 is a detail view of the tapered roller bearing; and

Fig. 5 is a detail view illustrating a modification.

The mill indicated in the accompanying drawing is of these-called cluster type wherein there are a pair of working rolls'l, 2 arranged one above the other and each provided with two back-up rolls 3, 4.

My attachment comprises two roll supports 5, which are spaced apart, and means, such as rods 6, for connecting them together. In the construction illustrated, each roll support comprises side members 7 and horizontal pins 8 connecting them. As illustrated in the drawing, each pin has an end portion fitting in a hole provided therefor in one of the side members and has an annular rib 9 that bearsagainst the inner face of said side member. The pin is held against rotation by means of a set screw 10 provided therefor in said side member. The other end of the pin is of reduced diameter to provide a shoulder 11 and has a sleeve 12 mounted thereon, which sleeve bears against said shoulder and is provided on its inner end with an annular flange 13 that bears against the inner face of the adjacent side member .of the support. The end of said pin projects beyond said sleeve and is threaded and provided. with a castellated nut 14. An antifriction roller 15 is mounted upon each of said pins by means of taper roller bearings interposed between them. Each roller is in the form of a hollow cylinder with its end portions counterbored to form an annular seat for a cup or outer bearing member 16 with a conical inner raceway surface. The cones or inner raceway members 17 are mounted directly on the pins and a circular series of taper rollers 18 is interposed between said inner and outer raceway members. Closure rings or washers 19 are mounted on the pins with their peripheral surfaces substantially in contact with the bores of the cylindrical rolls,

except that their adjacent edges are rabbeted to 30 receive piston rings 20 that fit more tightly in said bores. The closure rings next to the bushing are suitably secured to the'fianges thereof, as by dowel pins 21. An axial bore 22 extends from one end of each roll supporting pin .and

"communicates through a crossbore 23 with the -work rolls are secured together by rods or links 6 that extend horizontally between the necks of the work rolls. The side members of the roll supports are providedwith holes of somewhat greater diameter than said rods so as to permit limited movement between them longitudinally of said rods and transversely thereto in all directions. Each and of such rods is threaded and provided with threaded nuts 26 working thereon. Each rod is provided with a heavy helical spring 27, one end of which bears against the adjacent roll support and the other end of which bears against a nut 26 which serves as an abutment therefor and as a means of adjusting the compression of said spring. The end of each rod extends .loosely through an opening provided therefor in an anchor member 28 that is interposed between the adjacent roll support and the adjacent nut. The anchor member illustrated in the drawing comprises upright side members through which the floating rods extend, which side members are bent horizontally and joined together at their outer ends, thus forming a horizontal yoke. Extending upwardly throughthis yoke is a guide or limiting member 29 from which the anchor member is normally spaced somewhat.

The attachment just described is mounted with its floating rods disposed horizontally between the necks of the work rolls and with its antifriction rolls disposed in position to contact with the necks of said rolls, that is, with the upper antifriction roll of each pair of work supports in contact with the necks or the upper work roll and with the lower antifriction roll of each pair of work supports in contact with the necks or the lower work roll. By properly manipulating the adjusting screws on the floating rods, sufiicient pressure is exerted through the springs to press the work rolls into effective frictional engagement with the back-up rolls. This action contemplates actual lifting of the upper work roll and such lifting is permitted by the clearance between the floatingrods and the roll supports and by the loose connection of the anchor with the framework. At the same time that the anchor member permits such movement, it limits such movement and maintains the attachment as a whole in correct operative relation to the mill.

According to the modification illustrated in Fig. 5, each of the work roll necks is provided with a groove 30 that is somewhat wider than the length of the antifriction rolls. By fitting such antifriction rolls in said grooves, it becomes unnecessary to anchor the floating rods to the framework, as the shoulders formed by said grooves prevent shifting of the attachment lengthwise of the work rolls.

Obviously the construction hereinbefore described admits of considerable variation without departing from my invention, and I do not wish to be limited to the details described.

What I claim is:

1. An attachment for a rolling mill comprising two roll supports spaced apart and means independent of the mill connecting them, each support having two rolls arranged respectively to bear against the upper and the lower work roll of a pair and cooperating with the rolls of the other support to hold the work rolls apart.

2. An attachment for a rolling mill comprising two roll supports spaced apart and means independent of the mill for resiliently pulling them towards each other. each support having two rolls arranged respectively to bear against the upper and the lower work roll of a pair said pulling means being adapted to extend between the necks of the work rolls, whereby said support rolls are disposed on opposite sides of the vertical plane of the axes of said work rolls and tend to force said work rolls apart.

3. A self-contained attachment for a rolling mill comprising rods independent of the mill, two roll supports slidably mounted thereon and relatively moveable towards and from each other, and two rolls on each support arranged respectively to bear against the upper and the lower work roll of a pair with the rolls of one support disposed on one side of the vertical plane of the axes of the work rolls and the rolls of the other support on the opposite side of said plane and means for moving said supports towards each other, whereby said support rolls tend to force the work rolls apart.

4. A self-contained attachment for a rolling mill comprising rods independent of the mill, two roll supports slidably mounted thereon and relatively moveable towards and from each other, and two rolls on each support arranged respectively to bear against the upper and the lower work roll of a pair, and'means tending to pull said supports toward each other, said means comprising helical springs on the end portions of said rods and resting against shoulders on said rods.

5. An attachment for a rolling mill comprising two roll supports spaced apart and means .ior resiliently pulling them towards each other,

each support having two rolls arranged respectively to bear against the upper and the lower work roll of a pair, said means comprising rods extending loosely through said supports and provided beyond said supports with moveable abutments therefor, and said rods having one end portion extending beyond the moveable abutments and threaded and provided with a threaded nut and provided also with a helical spring resting against said moveable abutment and said nut.

6. A self-contained attachment for a rolling mill comprising two roll supports spaced apart and means independent 01 the mill connecting them, each support having two hollow rolls arranged respectively to bear against the upper and the lower work roll of a. pair, each support comprising side members and pins connecting them, and roller bearings interposed between said pins and said first mentioned rolls.

7. A self-contained attachment for a rolling mill comprising two roll supports spaced apart and adjustable means independent of the mill resiliently connecting them, each support having twohollow rolls arranged respectively to bear against the upper and the lower work roll of a pair, each support comprising side members and pins connecting them, and roller bearings interposed between said pins and said first mentioned rolls.

8. A self-contained attachment for a rolling mill comprising two roll supports spaced apart and means independent of the mill connecting them, each of said supports comprising side members and pins connecting them, each pin having a rib bearing against the inner face of one side member and having a reduced portion extending through the opposite side member, said reduced portionhaving thereon a bushing with a flange bearing against the inner side of the last mentioned side member, the first mentioned rollers being in the form of hollow cylinders with counterbored ends having conical raceway cups mounted therein, inner conical raceway members mounted on the pins, and taper roller bearings interposed between said inner and outer raceway members.

9. The combination with a rolling mill having a pair of work rolls andback-up rolls therefor of means for maintaining frictional driving engagement between them when the work rolls are idling, said means comprising two roll supports at each end of the work rolls and arranged respectively on opposite sides of the necks of the work rolls, means extending between said roll necks for pulling said supports towards each other, and two rolls on each support arranged to bear respectively against the necks of the upper and the lower work roll.

10. The combination with a rolling millwhich has a pair 01' work rolls and back-up rolls therefor of means for maintaining frictional driving engagement between said work rolls and said back-up rolls when the work rolls are idling, said means comprising floating rods extending horizontally between the necks of the work rolls with one end thereof moveably connected to the frame of the mill, roll supports slidablyrmounted on said rods and two rolls on each support arranged respectively to bear against the necks of the upper and lower work rolls.

11. The combination with a rolling mill which has a pair of work rolls and back-up rolls there-

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