US3358491A - Arrangements for guiding the chocks of rolling-mills - Google Patents

Description

Dec. 19, 1967 L; 0101.0 3,358,491

ARRANGEMENTS FOR GUIDING THE CHOCKS OF ROLLING-MILLS Filed Sept. 8, 1964 PRIOR ART 6b 5 I ,Bb I

D- l 1 5a F K12 FIG.4

PRIOR ART United States Patent .0

3,358,491 ARRANGEIVIENTS FOR GUIDING THE CHOCKS F ROLLING-MILLS Lucien Diolot, Neuilly, France, assignor to Societe Nouvelle Spidem, Paris, France, a corporation of France Filed Sept. 8, 1964, Ser. No. 396,798 7 Claims. (Cl. 72237) ABSTRACT OF THE DISCLOSURE Guiding means for the vertical movement of checks with respect to the standards of a rolling mill, said means including roller tracks on the inside of said standards adjacent either side of said chocks, rollers of fixed axis adjustably mounted on one side of each chock and adapted to engage said roller tracks, and rollers of movable axis mounted on the other side of each said chock and resiliently urged into engagement with said roller tracks.

Background of the invention The invention relates to improved guiding means provided between roll-carrying chocks and the internal faces of standards associated with rolling mills or the like.

In guiding means known heretofore for ensuring a vertical motion-of the chock with respect to the standard, it has been a requirement to machine the adjacent and relatively displaceable, mostly planar parts (which usually, are of substantial dimension) with very high accuracy. 4 In order to, maintain strict parallelism between the rolls, the relatively displaceable parts forming the known guiding means on the chock and on the standard must have a minimum clearance. This requirement, however, may give rise to jamming of the chock due to the heat expansions during operation. The heat eifect is particularly significant in high-speed rolling mills.

Summary of the invention In view of the foregoing it is an object of the invention to provide an improved, simplified and inexpensive guiding means for the vertical movement of chocks in standards associated with rolling mills for ensuring strict parallelism between the rolls and smooth vertical displacement of the chocks irrespective of the extent of heat expansion.

I Bn'eflystated, the novel guiding means comprises roller means of fixed but adjustable axis affixed to a chock adjacent one face thereof and engaging a roller track on an inside face of a standard-roller means of continuously displaceable axis aifixed adjacent the opposite face of the chock and engaging another roller track on the opposite face of the standard, and spring means resiliently urging the last named roller means against the roller track associated therewith.

The invention will be better understood and further objects and advantages will become more apparent from the ensuing detailed specification of a preferred embodiment taken in conjunction with the drawing.

Brief description of the drawing FIG. 1 is a schematic elevational view of a two-high rolling mill according to the prior art;

FIG. 2 is a sectional plan view taken along the axis of a roller of the mill shown in FIG. 1;

FIG. 3 is a sectional elevational view of a chock according to the invention; and

FIG. 4 is a sectional view taken along line 44 of FIG. 3.

Description of prior art Turning now to FIGS. 1 and 2 representing the prior art, there are shown two standards 1 and 1a of a twohigh rolling mill including two rolls 5 and 5a extending between said standards. Both ends of each roll journal in a chock disposed in an opening of the standards. As seen in FIG. 2, roll 5 is associated with chocks 4 and 4a. Chock 4 is disposed between the opposed inner faces 2 and 3 of standard 1, while chock 4a is disposed between the opposed inner faces 2:: and 3a of standard 1a. The chocks have to fit between the opposed inner faces of the standard with a clearance that is sufiiciently large to per- -mit a vertical displacement of the chocks 4, 4a with respect to the respective standards 1, 1a and yet small enough to prevent the axes of rolls 5, So from deviating from strict parallelism. These requirements necessitate a very accurate machining of the internal faces of the standards and also of the sides of the chocks.

Because of the heat transmitted by the rolls and the journals to the chocks, the latter are always at a higher temperature than the standards even in cold rolling mills, and consequently, during operation, the clearance decreases in a manner which depends upon the running conditions and which is difficult to predict. If the expansion is significant, jamming may even occur.

Moreover, the surfaces 2, 2a on one side and 3, 3a on the other side must be coplanar so as to prevent the journals from inducing additional stresses in the checks.

Further, when it is required to finely adjust the clearance between the rolls, particularly in rolling mills provided with a very accurate thickness control system, it may happen that a slight additional pressur from the tightening screw results not in a displacement of the chocks but only in small elastic deformations thereof if the drag on the surfaces 2, 2a, 3, 3a is excessive.

Description of the preferred embodiment Turning now to FIGS. 3 and 4 it is immediately apparent that the novel guiding means prevents a direct contact at any time between the chock and the inner faces of the standards. In FIGS. 3 and 4 there is shown in section the standard 1 having two opposed internal faces 2b and 3b. Face 2b is provided with two spaced elevated portions 20 and 2d while face 317 is provided with two spaced elevated portions 30 and 3d. All ofsaid elevated portions extend vertically and substantially parallel to one another and serve as roller tracks, as it will become more apparent as the specification progresses.

Between faces 2b and 31) there is disposed a chock 4b associated with one end of a roll 5. From one side face of chock 4b adjacent face 2b of standard 1 protrude four spaced rollers 6a, 6b, 6c and 6d and engage the respective roller tracks 2c and 2d. With each of rollers fizz-6d there is associated a respective spindle Sa-Sd to which, in turn, there is eccentrically secured a respective axle 14a-14d. Each axle 14a14d is fixedly but adjustably held in chock 41). By slightly rotating any of the axles 14a-14d, the respective eccentric spindle 8a-8d will cause the respective roller 6a-6d to protrude to a lesser or greater extent beyond the outline of chock 4b. Such an adjustment may be made at the time of installation to compensate for any errors in the machining of roller tracks 20, 2d, 3c, 3d and to ensure a parallelism of the rolls.

From the side face of chock 4b adjacent face 3b of standard 1 protrude four spaced rollers 7a, 7b, 7c, 7d and engage the respective roller tracks 30 and 3d. Each roller 7a7d has a respective central axle 9a-9d carried by a bracket 15a-15d straddling the respective roller 7a-7d. The base of each bracket 15a-15d is connected by a respective rod Ila-11d to a respective seat member 16a-16d each receiving a spindle 12a-12d. To each spindle 12a-12d there is eccentrically secured an axle 17a-17d each ailixed t chock 4b. Surrounding each rod 11a-11d is a spring means such as a stack of cup-shaped Washers a-10a' tensioned between the respective bracket a-15d and the respective seat Ida-16d. Spring means lira-10d are adapted to resiliently urge respective rollers '7 a7d into contact with roller tracks 30 and 3d. The force of any of spring means 10a-10d may be adjusted or the position of any of rollers 7a-7d may be changed by rotating the respective axle 17a-17d causing respective eccentric spindle 12a-12d to shift the respective seat lea-16d toward or away from tracks 3c and 3d,

Due to the novel guiding means described hereinabove, the machining of the standards is noticeably simpler. In fact, only the roller tracks 2:: and 2d have to be machined with accuracy; any roughness of roller tracks 3c and 3d will be taken up by spring means 10a10d. Furthermore, a perfect coplanarity of machined tracks and 2d is not critical in view of the adjusting feature of rollers 6a6a'.

In addition, it is apparent that due to the novel guiding means the machining of the lateral surfaces of the chocks is no longer necessary.

The clearance between the chock and the internal faces of the standard is sufiiciently large so that no jamming may occur even in case of very substantial heat expansion of the chock. Any variation of the clearance is taken up by springs 10a-10d. This feature also ensures that the rolls of the rolling mill are maintained in their strict parallelism.

Moreover, even if substantial secondary forces are exerted on the shocks (due, for instance, to the hold-back pull to which the rolled product is subjected), no jamming liable to interfere with small displacements of the chock may occur, since the rolling friction which was substituted for the sliding friction results in a much lower resistance to-the motion.

The removal of the checks may be eifectnated simply by turning axles 17a17d to withdraw the rollers 7a-7d into the checks and thus leaving a substantial clearance between the chucks and the inner face of the standards.

Examples of possible modifications The novel guiding structure described hereinabove may be modified in a number of ways without departing from the scope of the invention.

For instance, on the side of the fixed rollers, instead of four rollers fizz-6d, as few as two vertically spaced rollers are deemed to be sufiicient.

On the side of the spring-urged rollers, instead of four rollers 7a-7d, a single roller is sufficient to generate the reaction force that urges the fixed rollers against their roller track. a

It is further feasible to interchange the rollers and the roller tracks; that is, to mount the rollers on the inside of the, standards andtprovide the chOcks with the roller tracks.

I claim:

1. In a rollingmill of the typeincluding a pair of spaced standards disposed faceto-face, at least two vertically spaced parallel rolls extending between said standards,

both ends of each roll journaling in a chock, at least two checks being vertically displaceably disposed in an openiug of said standards, said opening defining vertically eX- tending opposed inner faces each being adjacent to opposed side faces of said checks, the improvement comprising,

(A) at least two vertically extending roller track means laterally flanking said checks and carried by one of said faces at either side of said chocks,

(B) first roller means afiixed adjacent to one of said, side faces of each said displaceable chocksand rollingly engaging at least one of said roller track means,

(Q) adjusting means associated with said first roller means to laterally move said first roller means toward or away from said roller track means at will and secure said first roller means in a selected lateral position with respect to said roller track means;

(D) second roller means afiixed adjacent to the other of said side faces of each said displaceable checks and rollingly engaging at least one of said roller track means, said second roller means being freely movable in a direction substantially normal to said roller track means during operation, and

(E) spring means resiliently urging said second roller means into contact with said roller track means.

2. The improvement as defined in claim 1, wherein said roller track means are carried by said internal faces of said standards and said first and second roller means are secured to said displaceable chocks.

3. The improvement as defined in claim 1, wherein said adjusting means includes an eccentrically mounted spindle surrounded by said first rollerimeans.

4. The improvement as defined in claim 1, wherein said spring means is formed by a stack of washers of cupshaped cross section.

5. The improvement as defined in claim 1, wherein said spring means engages said second roller means atone end and a seat at the other end, said seat adapted to be adjusted by displacement toward or away from said roller track means. i

6. The improvement as defined in claim 3, wherein each internal face of said standards includes at least one vertically extending elevated portion constituting said roller track means. i

7. The improvement as defined in claim 5, including an eccentricaliy mounted spindle received by said seat.

References Cited UNITED STATES PATENTS 1,870,509 8/1932 Heiden 72237 1,905,129 4/1933 Biggert et a1. 72-237 2,277,740 3/ 1942 Yoder 72'--237 3,145,065 8/1964 Cater 3086 3,197,988 8/1965 Roberts 72-237 3,198,588 8/1965 Cashman et al 308-6 CHARLES W. LANE-1AM, Primary Examiner.

A. RUDERMAN, Assistant Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,358,491 December 19, 1967 Lucien Diolot It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below Column 4, line 40, for the claim reference numeral "3" read 2 Signed and sealed this 21st day of January 1969.

(SEAL) Attest:

Edward M. Fletcher, Jr. EDWARD J. BRENNER Commissioner of Patents Attesting Officer

Claims (1)

1. IN A ROLLING MILL OF THE TYPE INCLUDING A PAIR OF SPACED STRANDARDS DISPOSED FACE-TO-FACE, AT LEAST TWO VERTICALLY SPACED PARALLEL ROLLS EXTENDING BETWEEN SAID STANDARDS, BOTH ENDS OF EACH ROLL JOURNALING IN A CHOCK, AT LEAST TWO CHOCKS BEING VERTICALLY DISPLACEABLY DISPOSED IN AN OPENING OF SAID STANDARDS, SAID OPENING DEFINING VERTICALLY EXTENDING OPPOSED INNER FACES EACH BEING ADJACENT TO OPPOSED SIDE FACES OF SAID CHOCKS, THE IMPROVEMENT COMPRISING, (A) AT LEAST TWO VERTICALLY EXTENDING ROLLER TRACK MEANS LATERALLY FLANKING SAID CHOCKS AND CARRIED BY ONE OF SAID FACES AT EITHER SIDE OF SAID CHOCKS, (B) FIRST ROLLER MEANS AFFIXED ADJACENT TO ONE OF SAID SIDE FACES OF EACH SAID DISPLACEABLE CHOCKS AND ROLLINGLY ENGAGING AT LEAST ONE OF SAID ROLLER TRACK MEANS, (C) ADJUSTING MEANS ASSOCIATED WITH SAID FIRST ROLLER MEANS TO LATERALLY MOVE SAID FIRST ROLLER MEANS TOWARD OR AWAY FROM SAID ROLLER TRACK MEANS AT WILL AND SECURE SAID FIRST ROLLER MEANS IN A SELECTED LATERAL POSITION WITH RESPECT TO SAID ROLLER TRACK MEANS, (D) SECOND ROLLER MEANS AFFIXED ADJACENT TO THE OTHER OF SAID SIDE FACES OF EACH SAID DISPLACEABLE CHOCKS AND ROLLINGLY ENGAGING AT LEAST ONE OF SAID ROLLER TRACK MEANS, SAID SECOND ROLLER MEANS BEING FREELY MOVABLE IN A DIRECTION SUBSTANTIALLY NORMAL TO SAID ROLLER TRACK MEANS DURING OPERATION, AND (E) SPRING MEANS RESILIENTLY URGING SAID SECOND ROLLER MEANS INTO CONTACT WITH SAID ROLLER TRACK MEANS.

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