US2651956A

US2651956A - End roll adjustment

Info

Publication number: US2651956A
Application number: US20287A
Authority: US
Inventors: Edward T Peterson
Original assignee: Birdsboro Steel Foundry & Mach
Current assignee: Birdsboro Steel Foundry & Mach; BIRDSBORO STEEL FOUNDRY AND MACHINE Co
Priority date: 1948-04-10
Filing date: 1948-04-10
Publication date: 1953-09-15
Anticipated expiration: 1970-09-15

Description

P 1953 E. T. PTETERSON 2,65flfl5fi END ROLL ADJUSTMENT Filed April 10, 1948 4 Sheets-Sheet 1 JET-1' KNVENTOR Sept. 15, 1953 END ROLL ADJUSTMENT Filed April 10, 1948 4 Sheets-Sheet 2 j iqz, 44

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END ROLL ADJUSTMENT Filed April 10, 1948 4 Sheets-Sheet 4 IINVENTOR Patented Sept. 15, 1953 END ROLL ADJUSTMENT Edward T. Peterson, Reading, Pa., assignor to Birdsboro Steel Foundry and Machine Company, Birdsboro, Pa., a corporation of Pennsylvania Application April 10, 1948, Serial No. 20,287

'5 Claims.

The present invention relates to rolling mills and particularly to axial end adjustment or rolling mill rolls.

A purpose of the invention is to produce an axial end adjustment for a rolling mill roll which is less complicated, less likely to require maintenance, more positve and simpler both in design and construction than those of the prior art.

A further purpose is to avoid the necessity for using numerous levers of high mechanical advantage which are likely to provide uneven adjustment on the two sides under conditions of wear.

A further purpose is to support the axial adjusting parts so as to avoid the likelihood of chattering, whipping, or producing non-uniform stresses in the adjusting parts.

A further purpose is to cut down the time required for roll adjustment, and permit adjustment to be made with very high accuracy, and maintained through a long period of service.

A further purpose is to adjust the thrust bearing by a yoke contained and preferably guided in a suitable horizontal slot in a bracket surrounding the thrust bearing, the yoke preferably engaging opposite flanges on the thrust bearing between hook ends on arms of the yoke and adjusting screws on the arms.

A further purpose is to provide a recess in the bracket for vertical adjustment of the thrust bearing.

A further purpose is to adjust the yoke axially by screw mechanism connecting with the bracket.

A further purpose is to limit motion of the chuck by stops on the bracket.

A further purpose is to interconnect the thrust bearing housing and the chuck by a dog and a cooperating vertical guideway.

Further purposes appear in the specification and in the claims.

In the drawings I have chosen to illustrate one only of the numerous embodiments in which my invention may appear, selecting the forms shown from the standpoints of convenience in illustration, satisfactory operation and clear demonstration of the principles involved.

Figure 1 is a front elevation partly in vertical section of a rolling mill to which my invention has been applied.

Figure 2 is a right end elevation of Figure 1.

Figure 3 is an enlarged horizontal section of Figure 4 on the line 33.

Figure 4 is an enlarged vertical section of Figure 2 on the line 44.

Figure 5 is a fragmentary enlargement of Fi ure 2.

Describing in illustration but not in limitation and referring to the drawings:

In rolling mills particularly employing grooved rolls, it is important to secure accurate adjustment of the axial position of the rolls, not only as to the initial position but also as to any axial take-up which may be employed to compensate for wear. It has therefore become common to employ adjusting devices at the ends of one or more of the rolls, to permit accurate setting of the axial position. Many such adjusting devices employed in the prior art have presented the difiiculty of undue complexity, making them not only expensive to manufacture, but likely to wear and require frequent maintenance. In a popular form of such prior art mechanisms, levers of high mechanical advantage have been used which are likely to change their settings with wear, and which require tedious duplicate adjustments on two sides to avoid applying uneven stresses to the end of the roll.

In accordance with the present invention, roll end adjustments are considerably cheapened and simplified, while at the same time a very sturdy construction is obtained which is not likely to require maintenance and which can be adjusted in a very minimum of time. Maximum support and guidance is given to the adjusting parts and they are not likely to chatter or whip as in some prior art constructions. The axial adjusting mechanism is quite flexible and permits maximum freedom in vertical adjustment without removal of the axial adjustment.

It will be evident of course that the invention may be applicable to any of the conventional types of mills, such as two-high, three-high, fourhigh, etc., single pass or reversing, and that in any such mill it may be applied to one, more or all of the rolls.

For simplicity I illustrate a two-high mill 25 having a frame 2| comprising a base 22, supported on a bed 23 and mounting a pair of uprights 24 at one end and a pair of uprights 25 at the other end spaced to provide at each end a central vertical guideway 26 and surmounted between each pair of uprights at each end by a cap 21 interconnected with the uprights by pins 28 and wedges 29.

The general features of construction form part of the subject matter of my patent application Serial No. 750,996, filed May 28, 1947, and now Patent No. 2,541,279, granted February 13, 1951, for Rolling Mill Having Removable Chucks.

Extending across each pair of uprights and through the guideway 26 spaced at each end is a lower horizontal rolling mill roll 30 which may be grooved or smooth, as well known. The lower rolling mill roll cooperates with an upper rolling mill roll 31 having a hub 32. The detail of the interrelation of the chucks or journals is not important to the present invention, and accordingly one type of chuck support will be described. The lower roll is j ournaled at each end in a lower chuck 33 and is held down by an upper chuck 34 whose bearing bronze is seen at 35.

The upper roll has an upper chuck 33 whose bearing bronze is seen at 3'! and is held up by a lower chuck 38 whose bronze is seen at 35.

The upward pressure against the upper roll manner well known in the art, here consistingv of a spiral spring 49 extending across in the space between these chucks. The upper roll lower chuck and the lower roll upper chuck are suitably interconnected as by weights 4!. Expansion of the spring and the wedges is limited by a tension rod i I Scale guards 42 (only one of which is shown) are provided for each roll.

The chucks at their lateral edges adjoining the uprights have flat guided surfaces 43 which move vertically in the guideways 26 and also slide axially with the rolls in such guideways.

Holddown pressure on the upper roll upper chuck is provided by adjusting screws l l extending through the caps and bringing pressure on breaker blocks 45 engaging the upper roll upper chucks.

The axial adjusting mechanisms, which are provided at the ends of each roll opposite to the drive connections 46, are shown at i'l. While such adjustments are here provided for both rolls, it will be evident that in many cases it will be sufficient to provide such adjustment on less than all of the rolls, for example only one in a two-high mill.

Beyond the roll neck at the adjustment ends thrust-bearing-engaging projections 68 are provided around which are located thrust bearing supporting sleeves 19, ball thrust bearing inner races 50, thrust bearing balls 5 l, ball thrust bearing outer races 52 and outer housings 53, surrounding one another. The sleeves 49 are extended at the end toward the roll neck to carry dirt, scale and water fiingers 54 cooperating with flanges 55 closing the ends of the housing 53 and having clearance from the dirt, scale and water flingers 54. Oil seals are provided at 55'. The thrust bearing inner races are held in position by split nuts 58 keyed at 5'1 on end portions 53 on the rolls, and cooperating with bearing retainer nuts 59 locked by set screws 6G. The outer end of the bearing housing is closed by cap 52 At opposite radial positions, preferably at opposite sides horizontally, on the collars 53 are projecting flanges 6i extending radially and carrying on each face hard wear members 82. Spanning each pair of uprights and surrounding each thrust bearing is provided a bracket 63 which engages on each upright and i connected thereto by bolts and nuts 6% and has a central vertical interior recess 65 in which the thrust bearing and housing are contained.

The bracket is conveniently made of two

separate bracketportions

65 and 65 spaced one above another to provide a substantially horizontal slot 61 extending from one side to the other of the bracket, and joined at the outer end by a bridge plate 68 bolted to the upper and lower bracket portions at 68.

- through-which passes a stud 16 threaded into the center of the arm 10 at approximately the axis and, having on opposite sides of the plate, adjusting nuts 11 and 18. Access openings 19 in upper and lower bracket portions permit contact with the inner adjusting nut.

The axial motion of the chucks outwardly in the guideways 26 is limited by stop lugs at the base of the bracket which prevent excessive outward motion. Engagement is shown in dot-anddash lines in Figure 3.

The rotation of thrust bearing housing and flanges 6| is prevented by a vertical guideway ill on the outer face of the upper roll upper chuck, which receives and guides a dog 82 on the inner face of the flange 55 united to the housing It will be noted that the interconnection at 8! and 82 permits vertical adjustment of the thrust bearing.

In operation, the mill will be assembled as shown, and the roll spacing adjusted by adjustment of holddown 44. If considerable adjustment is to be made, the locking screws 13 may be maintained loose to permit the thrust bearing on the end of the roll to move vertically as required. During the vertical adjustment the dog 32 moves in the guideway 8|, so that the thrust bearing housing does not rotate.

When the requisite vertical adjustment has been completed, if the locking screws 73 have been loose they are tightened, moving the flanges EH into contact with the hook ends l2 on the adjustment yoke, and gripping the flanges between the hook ends and the locking screws at each side of the thrust bearing.

In this position the roll is locked axially to the adjusting yoke 10, and the adjusting yoke is guided laterally by the slot 67. The exact desired axial adjustment is then obtained by loosening the nuts I? and T8 and adjusting one or the other to move the stud, the adjusting yoke and the thrust bearing and roll in the desired direction axially, after which the final adjustment is secured by locking the nuts 1'! and 78.

It will 'be evident that the roll end adjustment of the invention is very desirably free from play, and can be accomplished with considerable accuracy.

In the preferred embodiment as shown the adjustment of the axial position is provided at one end only of a given roll, the opposite end being permitted to float to allow for contraction and expansion longitudinally.

In View of my invention and disclosure variations and modifications to meet individual whim or particular need will doubtless become evident to others skilled in the art, to obtain all or part 02 the benefits of my invention without copying the structure shown, and I, therefore, claim all such insofar as they fall within the reasonable spirit and scope of my claims.

Having thus described my invention what I Patent is:

1. In a rolling mill, a frame having vertical uideways, a pair of cooperating rolls extending generally horizontally, chucks mounted in the frame, providing journal support for the rolls, and one set of which is guided for vertical and horizontal endwise movement in the guideways, a bracket mounted on the frame, extending over one end of that roll which is mounted on the chucks guided in the guideways, vertically recessed in line with the end of the roll beyond the chuck at that end of the roll and generally horizontally slotted in line with the roll, a thrust bearing on the roll end beyond the chuck, vertically adjustable in the recess of the bracket with vertical adjustment of the chuck, flanges on the opposite sides of the thrust bearing in line with the slot, a yoke in the slot and guided on the Walls of the slot having arms extending around the thrust bearing and around the flanges and having hooked ends engaging behind each flange, locking screws on the arms engaging the front of each flange and permitting vertical adjustment of th flanges, adjusting screw mechanism extending axially beyond the roll in general line with the center of the roll engaging the center of the yoke and the bracket and an interconnecting dog and cooperating vertical guideways between the thrust bearing and one of the chucks.

2. A rolling mill adjustment comprising a frame, rolls mounted thereon, a bracket mounted on the frame extending over one end of one of the rolls, slotted in a direction lengthwise of the roll and in plane parallel with the roll axis and having spaces above and below the end of the roll, a thrust bearing on the roll end, the spaces in the bracket being vertical and in line with the thrust bearing to permit vertical movement of the thrust bearing inside the bracket, flanges extending from the opposite lateral positions on the thrust bearing in line with the slot, a yoke in the slot of the bracket and guided thereon having yoke arms extending around the thrust bearing and releasably engaging opposite sides of the flanges to permit vertical adjustment of the flanges and thrust bearing with respect to the yoke, and adjustment means to axially position the yoke with respect to the bracket.

3. A rolling mill adjustment comprising a frame, rolls mounted thereon, a bracket mounted on the frame, extending over one end of one of the rolls, slotted in a direction lengthwise of the roll and in a plane parallel with the roll axis, and having spaces above and below, vertical and in line with the end of the roll, a thrust bearing on the roll end, the spaces being vertical and in line with the thrust bearing to permit vertical adjustment of the thrust bearing, flanges extending from opposite sides of the thrust bearing in line with the slot, a yoke in the slot and guided thereon having arms extending around the thrust bearing and hook ends engaging around behind each flange, locking screws on the arms engaging the front of each flange and releasable to permit vertical adjustment of the flanges and thrust bearing with respect to the yoke and adjusting screw means extending axially beyond the roll in general line with the center of the roll engaging the center of the yoke and the bracket.

4. A rolling mill adjustment comprising frame having vertical guideways, rolls mounted in the frame and one of which is vertically adjustable in the guideways, a bracket mounted on the frame, extending over one end of the rails, having vertical spaces above and below in line with the end of the roll and generally horiaontally slotted in line with the roll, a thrust bearing on the roll end, the vertical spaces being in line with the thrust bearing to permit vertical movement of the thrust bearing in the spaces, the thrust bearing being vertically adjustable with the roll, flanges on the opposite sides of the thrust bearing in line with the slot, a yoke in the slot and guided on the walls of the slot, having arms extending around the thrust bearing and around the flanges and having hooked ends engaging behind each flange, locking screws on the arms engaging the front of each flange and when loosened permitting vertical adjustment of the flanges in the spaces of the bracket, and adjusting screw means extending axially beyond the roll in general line with the roll, engaging the center of the yoke and the bracket.

5. A rolling mill adjustment comprising a frame having vertical guideways, rolls mounted thereon and one of which is vertically and horiz l y justable in the guideways, a bracket mounted on the frame, extending over one end of that roll which is adjustable in the guideways, having a vertical space in a direction lengthwise of the end of the roll above and below the end of the roll and generally horizontally slotted in line with the roll, a thrust bearing surrounding the end of the roll adjoining the bracket, vertically adjustable in the vertical space of the bracket with vertical adjustment of the roll, a yoke guided in the slot of the bracket and having yoke arms extending around the thrust bearing engaging opposite sides of the thrust bearing, connections between the yoke arms and the thrust bearing permitting vertical adjustment of the thrust bearing in the space of the bracket while the yoke retains the same vertical position and adjustment means to axially position the yoke with respect to the bracket.

EDWARD T. PETERSON.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,025,078 Vassen Apr. 30, 1912 1,839,497 Peterson Jan. 5, 1932 2,175,783 Rose Oct. 10, 1939 2,178,628 Duda Nov. 7, 1939 2,184,463 Morgan Dec. 26, 1939 2,335,800 Sheperdson et a1. Nov. 30, 1943