US1549731A - Rolling mill - Google Patents

Description

Aug. 11, 1925.

J. H. BODE ROLLING MILL Filed Jan. 16, 1922 6 Sheets-Sheet '1 INVENTOR Aug. 11, 1925 .1. H. BODE ROLLING MILL Filed Jan. '16, L922 B SheetS-ShQet 2 II III,

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Aug. 11. 1925 J. H.BODE

ROLLING. MILL Filed Jan. 1 1922 6 Sheets-Sheet INVENTOR J. H. BODE ROLLING MILL Filed Jan. 16 1922 6 Sheets-Sheet 5 I M mm Aug. 11. 1925.

J. H. BODE ROLLING MILL Filed Jan. 16 1 22 6 Sheets-Sheet 6 INVENTOR Patented Aug. 11, 19?.5,

l TED TSTA TE S a 1,549,731. P ATE NT .FFIC E JOHN H. BODE, O'F'BELLEVUE, PENNSYLVANIA, ASSIGNOR T MAGKINTOEH-HEM-P- HILL COMPANY, OF FITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

ROLLING MILL.

Application filed January 16,1922. Serial No. 529,438.

"To all whom it may concern:

Be it known that I, J oHNl-I. Bonn, residing at Bellevue, in thecounty of Alleglienyand State of Pennsylvania, a citizen of the United States, haveinvented or discovered certain new and useful Improvements in Rolling Mills, of which improvements the following is specification.

The invention described herein relates to a certain improvements in rolling mills of the three high type and has for its object the provision of means whereby the means carrying or supporting an intermediate roll may be shifted proportionately to adjust- ,15 ment of one of the mainrolls, and also whereby an intermediate :roll may be shifted into contact with the main rolls as required 'forthe back and forward passes of the article being rolled. The invention ishereinaftermore fully described and claimed.

Inthe accompanying drawingsforming a part of this specificationFigs. 1 and 2 are respectively elevationsof opposite sides of a three high mill having my improved mecha- 5 nism combined therewith; Fig. is an end elevation of one end of the -mill; Fig. 4 is a top plan view ofia portion of the mill Fig.

5 is asectional view on a vertical plane pass ing through the, adjacent screws of the up ,perand middle rolls. Figs. 6,7, 8 and 9 are end elevations showing diflerentpositions of the mechanisms employed for shifting and adjusting the middle roll.

In the practice of the invention,.beams 1, are rotatably mounted on thenecks 2 of the intermediate roll of a three "high millj These-arms are forked at one end for the reception of blocks 3 having trunnions 4:

mounted in prongs of the fork. Bods 5 pivtweenthemotor and the'shaft. This-motor is employed for shifting the intermediate roll up and down as required for back and forth passes and hence provision-is made in the practice of the art for starting the motor when an article haspassed in one direction from the rolls to automatically stop the motor when the crank arm 11 has moved through an arc of 180 degrees.

The opposite ends ofthe beams 1 are connected to rods 14: pivotally connected to the lower end of threaded rods or screws 15. In

order to prevent any injury or breakage of parts, it is preferred thatthe rods 14: should be yieldingly connected to the beams 1. lVlnle any construction of cushion maybe employed that shown has been found suitable, and consists ofheads 16 on the lower ends of; the rods 14, said heads being provlded with pins 17 extending down through blocks :18pivotally connected to the beams 1. Springs 19 are interposedbetween the heads 16 and the blocks 18 and between the latter and abutments 20 on the pins. As shown in Figs. 1, 3, 4: and 5 the threaded rods extend up through passages 21 in the over hanging portions 22 of the housing and into sleeves 23 rotatably mounted in bearings 24. Within the sleeves aresecured nuts adapted toengage the threaded rods, and theupper ends of the sleeves areprovlded wlth 1311110115 26 which are supported by the bearings 24. The threaded rods are grooved longitudinally for the reception of splines 27 carried by the sleeves 28 and adapted to prevent the rotation of the threaded rods with the nuts 25. The pinions 26 intermesh with idlers29 which are in engagement with peripheral teeth 30 on the annular driving heads 81, said heads being also provided with teeth 32 engaged by bevel pinions 33 on shaft 3 1 operatively connected by suitable gearing with a motor 35 preferably of the electric type. These driving heads having adriving but sliding engagement with the screws 36 passing through nuts 37 and employed for adjusting the upper roll of the mill. It will be under stood that necks or journalsof the upper roll extendinto bearing boxes 38 slidably arranged in the Windows of the housing and held against the lower endsof the screws 36 by suitable construction of mechanism known in the art.

.In describing the operation of the im; proved mechanism, the several members of the mill are presumed to be in the positions shown in Fig. 1, i. e., in positions which the members would occupy at the first pass in the reduction of a bloom or billet, etc., the intermediate roll being in contact with the upper roll. After the bloom, billet or other article has passed between the lower and the intermediate rolls, the driving heads are operated to rotate the adjusting screws 36 to move the upper roll down a distance de pendent on the reduction to be efiected in the succeeding or back pass. The rotation of the driving heads will cause, through the gearing connection, the rotation of the sleeves 23 and nuts 25 in the same direction as the driving heads, and consequently a downward movement of the threaded rods 15 and the left hand ends of the beams 1, the beams turning on the trunnions 4. After the top and intermediate rolls have been thus adjusted the crank arm 11 is moved down through an arc of 180 degrees, thus permitting the right hand end of the beams 1 to move down until the intermedi ate roll rests on the lower roll. The several rolls are now in position for the back pass. It will be observed that the rod 5 with its abutment 7 in no way limits the downward movement of the intermediate roll, and that the rod 5 will slide through the blocks 3 after the movement of the intermediate roll has been arrested by the lower roll.

After the completion of the back pass the upper roll is moved down which movement is accompanied by downward movements of the left hand ends of the beams. As during this shifting of the beams 1 the intermediate roll is supported by the lower roll, the beams 1 will pivot on the journals 2 of the intermediate roll the left hand ends of the beams moving up. After the downward adjustment of the upper roll and the pivotal movements of the arms 1, the crank arm 11 is moved upwardly, through an arc of 180 degrees. During a part of this movement of the crank 11 the rods 5 will slide through the blocks 3 until the abutment 7 bears against said blocks. Thereafter the right hand ends of the beams 1 will be driven up and the intermediate roll brought into contact with the upper roll. It will be understood that although the right hand ends of the beams are always moved upward to the same point by the pin 10, the beams during this movement pivot on the blocks 16, which has previously been adjusted to such a vertical position, that the upward movement of the right hand ends of the beams will bring the intermediate roll into Contact with the upper roll. I

It is characteristic of the improvement claimed herein that the adjusting movements of the upper and intermediate rolls are substantially equal and that the adjustment of both rolls is preferably effected simultaneously, and preferably by a common motor.

The movement of the intermediate roll,

necessary for effecting back and forth passes through the mill is effected by means independent of the adjusting mechanism, whereby the amount of reduction in each pass is determined.

It will be observed that when shifting the intermediate roll for changing the direction of passes, the beams will pivot on the blocks 18, but when adjusting the intermediate roll the pivotal points of the beams willdepend upon the position of the inter mediate roll. If the latter is in its upper position, i. e., in contact with the upper roll, the beams will turn on the trunnions 4: of the block 8, but if the intermediate roll is resting on the lower roll when the adjusting mechanism is operated the beams will turn on the journals of the intermediate roll, the right hand ends of the beams sliding along the rods 5.

I claim herein as my invention:

1. A three high rolling mill having in combination therewith means for changing the position of the middle roll relative to the lower roll in accordance with the reduction desired, and means for moving the middle roll vertically to change the direc tion. of operation of the mill.

2. A three high mill having in combination therewith means for adjusting one of the main rolls and the intermediate roll relative to the other main roll, and means for moving the intermediate roll relative to both rolls to change the direction of operation of the mill.

3. A three high mill having in combination therewith means for adjusting the upper roll, means for adjusting the intermediate roll and means having a constant range of movement for moving the intermepliate roll relative to the upper and lower rol s.

4. A three high mill having in combination therewith means for adjusting the upper roll, means for adjusting the intermediate roll operative by the adjusting means of the upper roll and means for moving the intermediate roll relative to the upper and lower rolls.

5. A three high mill having in combination therewith beams journalled on the intermediate rolls, an adjustable pivotal support for one end of said beams, and means slidably connected to the opposite ends of the beams for raising the intermediate roll.

6. A three high mill having in combination therewith beams journalled on the in termediate roll, vertically movable rods, blocks having pivotal connections with said rods, ends of said beams pivot-ally supported by said blocks means for moving said rod vertically, pivotably supported rods slidably connected to the opposite ends of the beams and provided with shoulders or abutments adapted to engage said beams and means for imparting predetermined vertiheated to the opposite end of the beams for oal movements to the rods. changing the position of the intermediate 7 A three high mill having in combinarolls with reference to the upper and lower 10 tion therewith beams journalled on the inr 18 5 termediate roll, an adjustable pivotal sup- In testimony whereof, I have hereunto set port for one end of said beams and means y halldhaving a constant range of movement oon- JOHN H. BODE.

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