US3580034A

US3580034A - Rolling mills

Info

Publication number: US3580034A
Application number: US748716A
Authority: US
Inventors: Alexander Ian Wilson
Original assignee: Hille Engineering Co Ltd
Current assignee: HILLE ENGR CO Ltd; Hille Engineering Co Ltd
Priority date: 1965-12-24
Filing date: 1968-07-30
Publication date: 1971-05-25
Anticipated expiration: 1988-05-25
Also published as: GB1159030A; FR1569351A; BE717392A; DE1752584A1

Abstract

A rolling mill has adjacent roll chocks connected together by a pair of pins extending parallel to the axes of the rolls.

Description

United States Patent Inventor Alexander Ian Wilson Sheffield, England Appl. No. 748,716 Filed July 30, 1968 Patented May 25, 1971 Assignee The l-lille Engineering Company Limited Sheffield, England ROLLING MILLS 10 Claims, 4 Drawing Figs.

U.S. CI 72/237, 72/244 lnt.Cl B21b31/00 Field of Search 72/237,

[56] References Cited UNITED STATES PATENTS 285,567 9/1883 Carter 72/237 2,072,831 3/1937 Solenberger 72/237 2,123,754 7/1938 Talbot 72/237 2,312,648 3/1943 Jones 72/237 3,055,242 9/ l 962 Wilson 72/248 3,309,909 3/ 1967 Wilson 72/248 Primary Examiner-Charles W. Lanham Assistant ExaminerMichael J. Keenan Attorney-lecies and Greenside ABSTRACT: A rolling mill has adjacent roll chocks connected together by a pair of pins extending parallel to the axes of the rolls.

Patented May 25, 1971 3,580,034

3 Sheets-Sheet l Manda, [Mu BY Patented May 25, 1971 3 Sheets-Sheet Z m W 77 N E/ J n M Patented May 25, 1971 r 3580;034

3 Sheets-Sheet 3 ROLLING MILLS The invention relates to rolling mills and has for its object to provide an improvement therein.

According to the invention, a rolling mill has at least two cooperating rolls carried between respective roll chocks, each roll chock for one roll being connected to an adjacent roll chock for an adjacent roll by a pair of pins extending parallel to the axes of the rolls. Preferably, the pins by which the adjacent roll chocks are connected together are disposed on the pass line between the rolls, one on the input side and one on the output side of a plane in which the axes of the rolls are disposed. Preferably, also, the pins by which adjacent roll chocks are connected together are provided with eccentric portions so that rotation of said pins can effect adjustment of the rolls towards or away from each other. To allow for lateral movement of the eccentric portions of the pins which occurs when adjustments of the rolls towards or away from each other are effected, thrust blocks preferably act against said eccentric portions, being so mounted as to be capable of orientating themselves easily to adjustments of said pins. The eccentric portions are preferably slightly barrelled to allow relative movements between adjacent roll chocks, in the plane of the rolls, when under load. Alternatively, the thrust blocks which act against said eccentric portions may react against the two upper roll chocks or the two lower roll chocks as the case may be through part-spherical seating pieces. Said thrust blocks preferably react against the upper roll chocks or the two lower roll chocks through respective spacer members, and said spacer members are preferably capable of being replaced by spacer members of different thickness to vary the size of the roll gap by a substantial amount, that is to say by an amount greater than can be achieved by rotating the pins connecting the adjacent roll chocks. Of each pair of roll chocks, one is preferably provided with a pair of lugs disposed centrally of its width whilst the other is provided with a pair of complementary apertures for the reception of said lugs. The pairs of roll chocks are preferably suspended in a frame and are preferably vertically adjustable in said frame as respective units by screw means. Each pair of roll chocks is preferably trunnion mounted in the frame on an axis perpendicular to the plane containing the axes of the rolls.

In order that the invention may be fully understood and readily carried into effect, a preferred embodiment thereof and a modification will now be described, by way of example only, with reference to the accompanying drawings of which:

FIG. 1 is a part-sectional front elevation of a rolling mill embodying the invention;

FIG. 2 is a part-sectional end view thereof;

FIG. 3 is a part-sectional detail view showing a modification; and

FIG. 4 is a sectional view on the line IV-IV in FIG. 3.

Referring now to the drawings, a rolling mill has a pair of cooperating rolls l and 12 carried between respective roll chocks l4, l6 and 18, 20.

Each roll chock for one roll is connected to the adjacent roll chock for the other roll by a pair of pins 22 extending parallel to the axes of the rolls and disposed on the pass line between said rolls, one on the input side and one on the output side of a plane in which the axes of the rolls are disposed. The pins 22 extend through lugs which are formed integrally with the roll chocks, each lower chock being provided with a pair of lugs 24 disposed centrally of its width and each upper chock being provided with a pair of complementary apertures to form pairs of lugs 26 between which the lugs 24 are received. Wearing plates 27 are provided on the inner edges of the lugs 26 and on complementary surfaces of the lower roll chocks to take up any slack in the direction of movement of material through the mill.

The pins 22 are rotatably mounted in respective pairs of bushes 28 which are inserted in the lugs 26. Eccentric and slightly barrelled portions 30 of said pins are located within the widths of the lugs 24 through which said pins extend and are disposed within elongated apertures 32 in said lugs.

It will be seen that the lower roll chocks are suspended from the eccentric portions 30 of the pins 22, and the weight of said lower chocks together with the weight of the lower roll and the force tending to separate the rolls under load is transmitted to said eccentric portions through thrust blocks 34 which overlie said portions and seat accurately on their barrelled surfaces. Spacer members 36 are disposed between the thrust blocks and the upper extremities of the apertures, and said spacer members overlie respective inserts 38 of half round cross section each of which seats in a semicircular pocket in the crown of its associated thrust block.

The arrangement is such that rotation of the pins 22 effects adjustment of the rolls towards or away from each other and the slightly barrelled form of the eccentric portions of the pins allows relatively movements between adjacent roll chocks in the plan of the rolls when-under load. The thrust blocks are capable of orientating themselves easily to allow for lateral movement of the eccentrics when the pins are rotated.

Spacer members (not shown) are provided for replacing the spacer members 36 when it is desired to vary the size of the roll gap by a substantial amount, that is to say by an amount greater than can be achieved by rotating the pins 22 and the spacer members can be inserted into or withdrawn from their operative positions through respective apertures 42 when the pins have been relieved by the weight of the lower roll chocks. For this reason, a pair of relatively long bolts 40 extend through each upper roll chock and engage threaded holes in,

the respective lower roll chocks. During normal operation, the bolts 40 extend freely above the upper roll chocks as shown in the drawings, but when it is desired to replace the spacer members 36, said bolts are tightened down so that they take the weight of the lower roll and the lower roll chocks. The spacer members 36 can then be withdrawn through apertures 42 in the outer lugs of the upper chocks.

The pairs of roll chocks and the rolls mounted between them are suspended in a frame 44 on pairs of trunnions 46 which project from the upper roll chocks on axes perpendicular to the plane containing the axes of the rolls. Means are provided for effecting vertical adjustments of the pairs of roll chocks as respective units in said frame, said means being constituted by a pair of screws 48 spaced apart at each end of the frame and abutting against the undersides of

respective bars

50 and 52 which extend across the front and rear of the mill and which support the trunnions. Guide apparatus generally indicated 54 is mounted on the

bars

50 and 52. Each of these bars is slotted at each end as at 56 so that lateral adjustments of the guide apparatus can be effected after slacking nuts 58.

Referring now to FIGS. 3 and 4, in a modification of the arrangement just described the pins 22 are formed with plain cylindrical eccentric portions 30 for ease of manufacture. Relative movement between adjacent roll chocks in the plane of the rolls is allowed for by virtue of the fact that in this case the thrust blocks 34 which act against the eccentric portions react against the upper surfaces of the apertures 32 through respective part-spherical seating pieces 60. The part-spherical seating pieces abut against respective spacer members 62 which in this case are slotted so that they can be inserted into position around respective screwed rods 64. The latter engage tapped holes in the part-spherical seating pieces and extend upwards through the spacer members and through clearance holes in the lugs 24 and through relatively large diameter holes in the upper chocks. Nuts 66 which engage said rods abut against seating surfaces formed at the upper ends of the lugs of the bottom chocks and can be reached by means of a box spanner, through the holes in the upper chocks, when it is desired to slacken them off to fit spacer members of different thickness. The arrangement is otherwise the same as the described with reference to FIGS. 1 and 2.

Various other modifications may be made without departing from the scope of the invention. For example, the invention could quite well be applied to a 3-high mill, roll chocks for the middle roll being provided with oppositely extending pairs of lugs and the pins 22 being duplicated, but in this case of course the sets of chocks could not be trunnion mounted.

The adjustment means for rotating the pins 22 are not illustrated but may take various fonns, and it will be understood that said adjustment means are preferably such that the pairs of pins are rotated in unison, although means may be provided for making an initial adjustment of individual pins or for making individual adjustments to compensate for wear.

What I claim and desire to secure by Letters Patent is:

l. A rolling mill comprising at least two cooperating rolls disposed so as to define a pass line and so that each has an axis parallel to an axis of the other in a common plane; a pair of roll chocks for each roll carrying the roll therebetween; a pair of pins extending parallel to the axes of the rolls and spaced from the common plane containing the axes of said rolls for connecting adjacent roll chocks together, each of said pins having an eccentric portion such that rotation thereof effects adjustment of the rolls towards or away from each other; selforienting thrust blocks mounted to act against said eccentric portions of said pins and to react against the respective chocks of one of said pair of roll chocks; and spacer members v cooperating with said thrust blocks and said roll chocks and by way of which said thrust blocks react against the respective cocks of said one of said pair of roll chocks.

2. A rolling mill as claimed in claim 1, wherein the pins of each pair of pins are disposed on the pass line between the rolls, one on each side of the common plane containing the axes of the rolls.

3. A rolling mill as claimed in claim 1, wherein the spacer members are interchangeable with spacer members of different thickness to vary the size of the roll gap, whereby the roll gap can be varied by an amount greater than can be achieved by rotating the pins connecting the adjacent roll chocks.

4. A rolling mill as claimed in claim 1, wherein the eccentric portions are slightly barrelled to allow relative movements between adjacent roll chocks in the plane of the rolls when under load.

5. A rolling mill as claimed in claim 1, additionally comprising pan-spherical seating pieces by way of which the respective thrust blocks can react against the respective roll chocks whereby relative movement between adjacent roll chocks when under load is allowed for in the plane of the rolls.

6. A rolling mill as claimed in claim 1, additionally comprising a lug on each chock of one pair of roll chocks disposed centrally of its width, and a complementary aperture on each adjoining chock of the other pair of roll chocks for the reception of said lugs.

7. A rolling mill as claimed in claim 1, additionally comprising a frame, the pairs of roll chocks being suspended in the frame.

8. A rolling mill as claimed in claim 7, additionally comprising screw means by which the pairs of roll chocks are vertically adjustable as respective units in said frame.

9. A rolling mill as claimed in claim 7, additionally comprising trunnion mounting means by which each pair of roll chocks is mounted in the frame on an axis perpendicular to the plane containing the axes of the rolls.

10. A rolling mill comprising: as least two cooperating rolls disposed so as to define a pass line and so that each has an axis parallel to an axis of the other in a common plane; a pair of roll chocks for each roll carrying the roll therebetween; a pair of pins extending parallel to the axes of the rolls and connecting adjacent roll chocks together and having eccentric portions for adjustment of the rolls; thrust blocks mounted to act against said eccentric portions of the pins and react against the respective chocks of one of said pair of roll chocks and so as to be capable of orienting themselves upon adjustment of said pins to allow for lateral movement of the eccentric portions; and spacer members by way of which said thrust blocks react against the respective roll chocks, said spacer members being interchangeable with spacer members of different thickness to vary the size of the roll gap, whereby the roll gap can be varied by an amount greater than can be achieved by rotating the pins connecting the adjacent roll chocks.

Claims

1. A rolling mill comprising at least two cooperating rolls disposed so as to define a pass line and so that each has an axis parallel to an axis of the other in a common plane; a pair of roll chocks for each roll carrying the roll therebetween; a pair of pins extending parallel to the axes of the rolls and spaced from the common plane containing the axes of said rolls for connecting adjacent roll chocks together, each of said pins having an eccentric portion such that rotation thereof effects adjustment of the rolls towards or away from each other; selforienting thrust blocks mounted to act against said eccentric portions of said pins and to react against the respective chocks of one of said pair of roll chocks; and spacer members cooperating with said thrust blocks and said roll chocks and by way of which said thrust blocks react against the respective cocks of said one of said pair of roll chocks.

5. A rolling mill as claimed in claim 1, additionally comprising part-spherical seating pieces by way of which the respective thrust blocks can react against the respective roll chocks whereby relative movement between adjacent roll chocks when under load is allowed for in the plane of the rolls.