US2042871A

US2042871A - Roll chuck assembly for rolling mills of the backed-up working roll type

Info

Publication number: US2042871A
Application number: US757310A
Authority: US
Inventors: Howard H Talbot
Original assignee: United Engineering and Foundry Co
Current assignee: United Engineering and Foundry Co
Priority date: 1934-12-13
Filing date: 1934-12-13
Publication date: 1936-06-02
Anticipated expiration: 1953-06-02

Description

June 2, 1936.

H. H TALBOT 2,042,871 ROLL CHUCK ASSEMBLY FOR ROLLING MILLS @E TEE EAcKED-UP WORKING EOLL TYPE Filed Dec. 13, 1934 2 Sheets-Sheet l Q Ffg 1. f

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June 2, 193s. H. H. TALBOT 2,042,871

ROLL CHUCK ASSEMBLY FOR ROLLING MILLS OF THE BACKED-UP WORKING ROLL TYPE i ffy/77777 @l Q El w Q Nf` N Q ms. H

Q INVENTOR WTNES-SES Patented June 2, 1936 UNITED STATES PATENT OFFICE ROLL CHUCK ASSElVIBLY FOR ROLLING MILLS OF THE BACKED-UP WORKING ROLL TYPE Application December 13, 1934, Serial No. 757,310

9 Claims. (Cl. 80-55) This invention relates to rolling mills of the backed-up working roll type, and more particularly to an improvement in the assembly Aof mechanism employed to retain the bearing chucks for the rolls of such mills in their operative positions.

The common practice in the construction of mills of this type wherein small working rolls are used, is to mount the bearing chuck for the small working roll within the projected side walls of one of the backing-up roll chucks. The use of this method of mounting chucks in mills in which roller bearings are used, presents a problem of retaining the working roll chucks against axial displacement in such a way that they can be readily removed. The cause for this diculty is that the working roll chucks are somewhat shorter than the backing roll chucks and, consequently, their outer ends are displaced inwardly from the other ends of the backing roll chucks, rendering the working roll chucks very inaccessible for clamping to prevent axial displacement or for unclamping for the purpose of removal, and as it is necessary to remove the working rolls quite frequently, it is desirable that the disassembli-ng and assembling of the working roll chucks be made as simple and easy as possible. Heretofore releasable clamping plates, or equivalent devices employing a plurality of bolts or screws which have to be removed or released each time the working roll chuck is removed, have been customarily used for this purpose. Due to the inset of the working roll chucks and the consequent diiculty in releasing the screws or bolts of such clamp their use is rendered both awkward and inconvenient as well as undesirable from the standpoint of the time required to disassemble and reassemble them, which it is highly desirable to minimize as much as possible.

With this in mind, it is an object of this invention to provide an improved meagnsmfor releasably holding the working rolchucks of a backed-up mill inplace in'thbackig'rll'chucks which is extremely simple of construction, dependable in operation, and susceptible of being adjusted to permit the removal and assembly of the working roll chucks with' a Yminimum of effort and time.

This and various other objects, as well as they various other novel features and advantages of the invention, will be apparent when the following detailed description is read in conjunction with the accompanying drawings, of which Fig. 1 is an end elevation of a rolling mill incorporating an embodiment of the invention, and

Fig. 2, a horizontal sectional view taken on the line II-II of Fig. l but showing the working roll in plan.

Referring in detail to the drawings, the numeral I designates generally a housing of a rolling mill of the 4-high backed-up working roll type in the window 3 of which there is arranged a pair of working

rolls

4 and 5 that are laterally supported by a pair of backing rolls 6 and l. In conformance with the prevailing practice the necks 4a and 5a of the

working rolls

4 and 5 are mounted in a pair of

bearing chucks

8 and 9 which are in turn nested for vertical and endwlse movement in suitable openings II and I2 provided therefor in the bottom and top respectively of the bearing chucks I3 and I4 in which the necks 6a and Ia of the backing rolls 6 and 'I are supported. These latter chucks are themselves mounted in the window 3 of the roll housing I with the upper one disposed for vertical adjustment under the control of a screw-down mechanism I5.

To prevent any axial displacement of the backing roll chucks I3 and I4 a plurality of releasable end clamps I6 are provided which are held in place by a plurality of suitable bolts II threadably engaged in the roll housing I.

In accordance with this invention to hold the

working roll chucks

8 and 9 in place in the backing roll chucks a pair of latches I8 is provided in each backing roll chuck opposite the outer end of each working roll chuck. These latches, as shown, are provided with a substantial face |811 for engaging the working roll chucks and are pivotally supported in the backing roll chucks by pins I9 extended through a pair of spaced brackets 2l and 2 Ia formed on the backing roll chucks, the pins being held in place by collars ISa keyed to the pins between the two brackets 2| and 2 Ia. Between the former of these brackets and the body proper of each chuck a suitable recess 22 is provided to receive and permit the latch associated therewith to be moved completely out of the path of movement of the working roll chucks when disengaged so as to permit the working roll chuck to be freely removed from the backing roll chuck. While, as illustrated in this embodiment of the invention, the latches I8 are disposed to engage the outer end of the working roll chucks in a manner to prevent any outward movement thereof in the backing roll chucks and the inward movement prevented by anges 20 provided on the outer edges of the working roll chucks which seat in oisets ID in the edges of the backing roll chucks, it will be appreciated that both movements may be prevented by the latches.

To retain the latches I8 in their operative and inoperative positions releasable stops 23 are provided, the stops being so located as to engage the latches on one side when in one position and on the other when in the other position. Such stops may be either simply screw bolts as shown, which must be unscrewed each time the latches are moved, or spring biased depressible spring-type stops which may be simply forced into the face of the backing roll to permit the latches to be moved thereover and automatically returned to their operative positions as soon as the latches are moved past them. In their preferred form the latches are so shaped that the ones on the upper backing roll chuck will fall by gravity into their unlatched position when the stops 23 are moved out of engagement with them. However, to assure and simplify the movement of these latches into and out of their operative and inoperative positions they are keyed or otherwise fastened for rotation on the pins I9 about which they are pivoted and these pins provided with non-circular outer ends projected beyond the face of the housing for the reception of a turning tool by means of which they may be readily turned by an operator from one position to another.

In practicing this invention, aswill be readily appreciated by those skilled in the art, the only operations necessary for the removal of the working roll chucks in so far as their retention in the backing roll chucks is concerned, is to remove the latch-engaging stops 23 and turn the latches i8 to their non-engaging positions.

As shown in Fig. 2, it is necessary to provide these latches at one end of the Working rolls only as the Working roll chucks are so mounted as to prevent their being moved axially on the necks of the working rolls. To accomplish this, an internal shoulder 23a is provided on the inner end of the bearing receiving opening in each of the working roll chucks to engage the inner end of the bearing cage 24 mounted therein, and this cage held against axial movement on the roll neck by a collar 25 mounted on the inner end thereof, and a sleeve 26 mounted on its outer end, the latter being in turn held in place by an assembled retaining ring 21 mounted in a groove 28 provided for its reception adjacent the outer ends of the roll neck.

While such comprises no part of this invention, the backing roll chucks shown are designed to be interchangeable so as to minimize the replacement equipment necessary to maintain a mill in operative condition. This accounts for the chucks at the two ends of the mill as illustrated in Fig. 2 being provided with bracket formations for the reception of working roll chuckengaging latches, although such latches, for the reasons referred to hereinbefore, lare provided at only one end of the rolls.

As will be readily appreciated by thos'e skilled in the art, the working roll chuck retaining latch mechanism provided by this invention greatly facilitates the assembling and disassembling of the Working rolls and represents a very desirable improvement over the prior means employed for this purpose.

According to the provisions of the patent statutes, I have explained the principle and mode of operation of my invention and have illustrated and described what I now consider to represent its best embodiment. However, I desire to have it understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically illustrated and described.

I claim:

l. In a rolling mill of the backed-up working roll type a working roll chuck, a backing roll chuck designed to receive said working roll chuck and permit vertical and endwisemovement .of the latter therein, a releasable,l'atch for engaging and preventing endwise movement of the working roll chuck, said latch being mounted in a recess in said backing roll chuck and means for moving it into and out of engagement with said working roll chuck.

2. A roll chuck assembly for use in a rolling mill of the backed-up working roll type comprising a backing roll chuck, a working roll chuck nested in said backing roll chuck, a latch pivotally mounted in a recess in said backing roll chuck adjacent the working roll chuck and movable into and out of engagement with said working roll chuck to prevent relative endwise movement of the working roll chuck in the backing roll chuck.

3. A roll chuck assembly for use in a rolling mill of the backed-up working roll type comprising a backing roll chuck, a Working roll chuck nested in said backing roll chuck, a latch pivotally mounted in a recess in said backing roll chuck and movable into and out of engagement with said working roll chuck to prevent relative endwise movement of the latter, and releasable means for retaining said latch in its chuckengaging position.

4. A roll chuck assembly for use in a rolling mill of the backed-up working roll type comprising a backing roll chuck, a working roll chuck nested in said backing roll chuck, a pair of latches pivotally mounted in recesses in said backing roll chuck in the sides thereof adjacent said working roll chuck and movable into and out of engagement with said working roll chucks, and means for releasably holding said latches in their operative and inoperative positions.

5. A roll chuck assembly for use in a rolling mill of the backed-up working roll type comprising a, backing roll chuck, a working roll chuck nested in said backing roll chuck, a latch pivotally mounted in a recess in the side of said backing roll chuck adjacent the Working roll chuck and movable into and out of engagement with said Working roll chuck, and a pivot pin on which said latch is keyed mounted in said backing roll chuck with its end projecting outwardly therefrom to facilitate the adjustment thereby of said latch.

6. In a rolling mill of the backed-up working roll type, a backing roll chuck, 5:;911 mounted in said chuck, a working roll, a working roll chuck mounted on the end of said working roll and nested in said backing roll chuck and also held against relative endwise movement on said working roll, and a latch mounted/ in a recess in the side of said backing roll chuck adjacent the working roll chuck and movable into and out of engagement with said Working roll chuck to releasably hold the latter in place in the backing roll chuck.

7. In a rolling mill of the backed-up working roll type, a backing roll, a pair of chucks for the opposite ends of said backing roll, a working roll, a pair of working roll chucks mounted on the opposite ends of said working roll and nested in said backing roll chucks, means for preventing relative endwise movement of said working i roll chucks on said working roll, and a latch/ mounted in a recess in the side of one of said backing roll chucks adjacent the working roll chuck nested therein and movable into and out of engagement with said working roll chuck for holding it and the working roll against endwise movement.

8. A roll chuck assembly for use in a rolling mill of the backed-up working roll type comprising a backing roll chuck, a working roll chuck of shorter length than the backing roll chuck nested in the latter at the inner end thereof, and latching eans supported in a recess in a side of the backing roll chuck adjacent the working roll chuck and inwardly from the outer end thereof movable into and out of engagement with the working roll chuck for preventing endwise movement thereof and means for operating said latch from the outer end of the backing roll chuck.

9. A roll chuck assembly for use in a rolling 5 roll chuck and a free end provided with an outer 10 face extending at an angle to the axis of the latch which fully engages the working roll chuck when in its latched position and is adapted to be moved in less than 90 to a full unlatched position, and means for releasably retaining said 15 latch in its engaged and disengaged positions.

HOWARD H. TALBOT.