US2729123A

US2729123A - Device for mounting roll chocks

Info

Publication number: US2729123A
Application number: US271395A
Authority: US
Inventors: Will A Breedon; Louis L Miller
Original assignee: United States Steel Corp
Current assignee: United States Steel Corp
Priority date: 1952-02-13
Filing date: 1952-02-13
Publication date: 1956-01-03
Anticipated expiration: 1973-01-03

Description

3, 1955 w. A. BREEDON ET AL 9,123

DEVICE FOR MOUNTING ROLL CHOCKS Filed Feb. 15, 1952 2 Sheets-Sheet l FIEA- Inventors: mu 4. 525mm and 100/5 1. Mame,

Jan. 3, 1956 Filed Feb. 15, 1952 FIEJIJ- w. A. BREEDON ET AL 2,729,123

DEVICE FOR MOUNTING ROLL CHOCKS 2 Sheets-Sheet 2 Inventors: W/AL 4. BEfffiO/V and 100/5 1. Mum/e,

United States Patent 2,129.1 nav cnron MOUNTING ROLL cnocxs Annlisat qn Feb u ry 3. 1 2 e i N .3

5 Claims (CI. 80-55) This inventionrelates toimproved devices for mounting roll chocks in rolling mill housin gs.

During rolling operations rolls are subject to severe stresses which tend to defiect them from their normal axes and thus cause their bearings to wear unevenly. To overcomethis tendency, roll chocks can be mounted for free pivotal mQVQment on axes perpendicular to the roll axes, whereby the bearings remain in alignment with the rolls as theJatter deflect.. In modern constructions it is also; consideredimportantto make rolls and their chocks axially adjustable.

An, object-of the. present inventionis to provide an improvedcmounting device which-both furnishes axial adjustability and, also allows the roll chocks to pivot freely on axes perpendicular to the roll axes. v A more specific object is'to provide a mounting device which-includes a tab fixed to the side of a roll chock and apair of adjustable jaws which grip the tab and yet allow pivotalmovement ofthe chock.

In accomplishing these and other objects of the invention, we have provided improved details of structure, preferred forms of which are shown in the accompanying drawings, in which:

Figure 1 is a side elevational view of a portion of a rolling mill equipped with a mounting device which embodies features of the present invention;

Figure 2 is a horizontal sectional view taken substantially on line II-II of Figure 1; I

Figure 3 is a vertical sectional view taken substantially on line III-III of Figure 1;

Figure 4 is a horizontal sectional view taken substantially on line IV-IV of Figure 3; and

Figure 5 is a fragmentary vertical sectional view similar to Figure 3, but showing a modification.

Figures 1 and 2 show a rolling mill which includes spaced apart housings and 12, upper and

lower work rolls

13 and 14 respectively, and upper and

lower roll chocks

15 and 16 respectively. The two chocks in the housing 10 can be mounted in any standard or desired way. Preferably the usual shims 17 are included at one side of the chocks in both

housings

10 and 12. Mounting devices of the present invention, hereinafter described, are used to mount the two chocks in the housing 12. The housings carry the usual turn-down screws 18, and the rolls and chocks can be removed from the housings by lifting them upwardly in the usual fashion, after moving the turn-down screws and their bearings out of the way.

The mounting device of the present invention is similar on both the upper and

lower chocks

15 and 16 and therefore is described in detail only for the upper chock 15. The side of this chock carries a fixed and preferably integral tab 19, the center line of which either coincides with the transverse center line of the roll bearing within the chock or is fairly close thereto. Housing 12 has a transverse opening 20 alongside said tab. An inner jaw 21 is mounted in opening 20 for sliding movement in a direction parallel to the roll axis and carries an integral 2. lug 22 whichoverlies the outer face of housing,12. An outwardly projecting bolt 23 is fixed to the outer face of housing 12 and extends throughan opening in lug; 22. Nuts 24 are threadedly engaged with bolt 23 on opposite sides of said lug. The inner jaw has a transverse open: ing 25, the outer portion of which is screw. threaded An outer jaw 26 has an integral stud 27 slidably received in said opening. A cap screw 28 is threadedly engaged with a he threaded por o p t i open n nd a s he. u er. end of stud 27 Preferably this cap screw carries a lock nut 29;

Tab 19 is gripped betweenjaws 21 and 26 Pressure on the tab is controlled through adjustment of the cap screw 28. The jaws can .be loosened for removing the chock and roll from the housingmerely by loosening this screw. The axial position of the jaws and alsoof the tab and chock 15 is controlled by adjustment of nuts 24 on bolt 23. Thus it is seen that the mounting device allows both ready adjustment of the axial position of the, roll, as well as ready removal of the roll chock from the housing.

As Figure 3 shows, the gripping faces of both the

jaws

21 and 26 arelconvex, while the faces of the tab are flat. Thus the tab is free to rockon an 'axis which is situated midway between the grip points and is perpendicular to the, roll axis.

The, turn-down screw and the housing respectively engage the upper face of the upper chock 15 .and the lower face of the lowerfchock 16 in a way whichallows such rocking movement. The upper face -of chock 15 carries a freely slidable block30 which has a concave socket 31 in its upper face (Figures 1.and.3) The lower end of. the turn-down screw 18 is convex and is received in said socket. As the upper chock 15 pivots, the block 30 slides back and forth along the upper surface of the chock and at the same time pivots with respect to the turn-down screw. The bottom face of chock 16 carries a fixed shoe 32 whose lower surface is convex (Figure 3). The center about which this surface is constructed preferably coincides with the center line of the tab 19 on this chock, which line also is the center about which the chock pivots. The shoe rests on a flat bearing surface 33. As the lower chock 16 pivots, the shoe 32 slides back and forth across this bearing surface. The axes of the rolls may move upwardly or downwardly depending on whether the rolls are new or dressed down from their original diameter. Therefore, the bearing means of the chocks must allow for different positioning of the chock. The tabs 19 are provided with bearing areas long enough to provide ample contact with the

convex jaws

21 and 26 regardless of the positions of the rolls in the roll housing.

Figure 5 shows a modification in which the tab 19a has convex surfaces and the gripping surfaces of the jaws 21a and 26a are fiat. The structures are otherwise the same. The chocks can rock in the same fashion as already described for Figures 1 to 4.

From the foregoing description it is seen that the present invention furnishes a roll mounting device of simple construction and yet which permits axial adjustment of the rolls as well as rocking or pivotal movement of the chocks. The device has the further advantage that it is readily installed on existing rolling mills with but minor alterations.

While two embodiments of our invention have been shown and described, it will be apparent that other modifications and adaptations may be made without departing from the scope of the following claims.

We claim:

1. In a rolling 'mill which includes a housing, a chock mounted in said housing and a roll rotatably mounted in said chock, the combination with said housing and chock of a mounting device which comprises a tab fixed to a side face of said chock adjacent the horizontal transverse center line of the chock, an inner jaw mounted in said housing for sliding movement in a direction parallel to the roll axis, an outer jaw slidably mounted on said inner jaw, said jaws having faces which engage opposed faces of said tab for gripping the latter within the confines of said housing, means for adjusting said outer jaw with respect to said inner jaw and thereby adjusting the gripping pressure on said tab, and means for adjusting said inner jaw relative to said housing and thereby axially adjusting said chock and said roll, one of the engaging faces of said tab and said jaws located at the inner side of said tab and one located at the outer side thereof being convex and allowing said chock to pivot on an axis perpendicular to the roll axis.

2. In a rolling mill which includes a housing, a chock mounted in said housing and a roll rotatably mounted in said chock, the combination with said housing and chock of a mounting device which comprises a tab fixed to a side face of said chock adjacent the horizontal transverse center line of the chock, an inner jaw mounted in said housing for sliding movement in a direction parallel to the roll axis, screw-threaded means projecting from the outside of said housing and adjustably engaging said inner jaw for positioning tthe latter, an outer jaw slidably mounted on said inner jaw, and screw-threaded means engaging said inner jaw and abutting said outer jaw for positioning the latter, said jaws having gripping surfaces engaging opposed faces of said tab within the confines of said housing, one of the gripping surfaces located at the inner side of said tab and one located at the outer side thereof being convex and permitting said chock to pivot on an axis perpendicular to the roll axis.

3. In a rolling mill which includes a housing, a chock mounted in said housing, and a roll rotatably mounted in said chock, the combination with said housing and chock of a mounting device which comprises a tab fixed to a side face of said chock with the horizontal transverse center line of the chock extending through the tab, said housing having a horizontal passage extending in a direction parallel to the roll axis and into which said tab projects, an inner jaw mounted in said passage for sliding movement in a direction parallel to the roll axis and having a gripping surface engaging the inner face of said tab, screwthreaded means projecting from the outside of said housing and adjustably engaging said inner jaw for positioning the latter, an outer jaw slidably mounted on said inner jaw and having a gripping surface engaging the outer face of said tab, and screw-threaded means engaging said inner jaw and abutting said outer jaw for positioning the latter, one of the engaging faces of said tab and said jaws located at the inner side of said tab and one located at the outer side thereof being convex enabling said chock to pivot about its horizontal transverse center line.

4. A combination as defined in claim 3 in which the convex faces are on said jaws.

5. A combination as defined in claim 3 in which the convex faces are on said tab.

References Cited in the file of this patent UNITED STATES PATENTS 1,004,771 Gibbons Oct. 3, 1911 1,904,247 Palmgren Apr. 18, 1933 2,047,509 Iversen July I4, 1936 2,167,457 Leufven July 25, 1939 2,184,463 Morgan Dec. 26, 1939 FOREIGN PATENTS 425,267 Germany Feb. 13, 1926 564,340 Great Britain Sept. 22, 1944 659,126 Great Britain Oct. 17, 1951 688,479 Great Britain Mar. 11, 1953