US1032679A - Frictional driving mechanism for rolling-mills. - Google Patents

Description

A. J. JAMESON.

PRIGTIONAL DRIVING MECHANISM FOR ROLLING MILLS.

APPLICATION FILED SEPT. e, 1910.

1,03%;679, Patented July 16, 1912.

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0111SZM11K W MwZM ALBERT J. JAMEsON,

STEEL AND WIRE COMPANY OF NEW JERSEY, OF

PORATION OF NEW JERSEY.

or woRoEsTER, MASSACHUSETTS, ASSIGNOR To THE AMERICAN HOBOKEN, NEW JERSEY, A COR- FRIGTIONAL DRIVING MECHANISM FOR ROLLING-MILLS.

aoaae'ra.

Specification of Letters Patent.

Patented July 16, 1912.

Application filed September 6, 1910; Serial No. 580,645.

To all whom it may concern:

Be it known that I, ALBERT JAMES JAME- SON, of Worcester, in the county of VVorcester and State of Massachusetts, have invented certain new and useful Improvements in Frictional Driving Mechanism for Rolling-Mills, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to apparatus used for driving rolling mills and more particularly relates to the driving mechanism used in connection with cold rolling mills for cold rolling.

Heretofore, in the operation of rolling mills, both the top and the bottom rolls have been positively driven at the same angular velocity andany variation in diameter of the two rolls resulted in these rolls rotating at different surface speeds. In the rolling operations with rolls of different diameters, one roll or the other will slip upon the surface of thefmetal being rolled on account of the difference in surface speed, causing rapid wear of the rolls as well as the driving gears and in'some cases result- I ing in breakage of the driving gears, spindies, coupling boxes, roll wabblers or other parts of the roll driving apparatus. has also been the practice in some cases to drive but one, generally the top roll, by frictional engagement with the metal being rolled, to insure rotation of the rolls at a uniform surface speed, corresponding to the surface speed of the metal being rolled, and in this way overcoming the slip and other difficulties experiencedin using rolls of unequal diameters and preventing breakage caused by the slippage and unequal strains put upon the driving mechanism, when the surface speed of the rolls is not uniform and differs from that of the metal being rolled.

One object of my invention is to provide a driving mechanism for rolling mills of improved construction having novel means for independently driving both rolls at a uniform surface speed equal to that at which the metal being rolled travels between the; rolls without reference to the relative diameters of the rolls, that is, in the sense that one roll is not frictionallydi iven by contact with the metal being rolled.

Another object of the invention is to provide roll driving mechanism having improved means for preventing excessive wear on the driving gears or pinions and for overcoming slippage between the contacting surfaces of the rolls and the 'metal being rolled, and by the use of which liability of breakage of the vrolls and roll driving mechanism is lessened and overcome.

In the accompanying drawings, Figure 1 is a side elevation, partly in section, showing a cold rolling mill and its driving pinions and showing the frictional driving mechanism connecting the p'inions and rolls constructed and arranged in accordance with my invention. Fig. 2 is a detail longitudinal section on a larger scale showing one construction of the frictional roll driving mechanism employed in connecting the top roll of the mill with its driving in accordance with my invention.

In these drawings, 2 designates the top and 3 the bottom roll of a cold rolling mill. The rolls 2 and 3 are dows of the roll housings 4 in the usual manner, being providedvwith the usual roll bearings located in the windows of the housings. Housing screws 5 by which the rolls are adjusted and Held in place in the housings are connected by the gears 6 through a spur pinion 7 with the hand adjusting wheel 8 and a lever 9 is provided on the adjusting wheel 8 for operating the screws 5 in raising and lowering the top roll 2 relative to the bottom roll 3. Located at a suitable point on one side of the housings 4 are the spur gears or roll pinions 10. and 11 by which the rolls are independently driven. The necks of the pinions 10 and 11 are mounted in suitable bearings-12 and 13 secured in the pinion housings 14 which as shown are of the inclosed type. r

The pinion 11 is provided on the end of one neck with a spur pinion 15 which is in mesh with and is driven by the spur gear 16, this gear'meshing with and being driven by the spur pinion 17 on the end of the driving shaft 18 which is mounted in bearings 19 secured on the brackets 20 forming pinion,

' hand lever (not shown).

The rolls '2 and 3 are provided on the ends of their necks with wabblers 24 and the end of one neck of the driving pinions 10 and 11 is also provided with similar wabblers 25. The wabbler on the lower r0113 is connected to-the wabbler 25 on the neck of the pinion 11 by means of the ordinary spindle' 26 andcoupling boxes 27 the usual wooden spreaders being employed to hold the coupling boxes in position. The top roll 2 is also connected to its drivin pinion 10 by means of a spindle 28. T 's spindle 28 which forms the driving connection between the pinion 10 and the top roll 2 is divided transversely of its length and one portion or member thereof is provided near one end with an annular flange 29 and'with a propart of jecting end portion 30 which fits into a recess 31 on the coupling member 32 forming this spindle 28. The coupling member 32 is provided with a flange 33 having a plurality of stud bolts 34 located atsuitably spaced distances, which enter the registering bolt holes in the annular flange 35 that is loosely placed on the spindle 28 on the far side of its flange 29. V f The parts forming this spindle are assembled (as is best shown in Fig. 2) with annular rings 36 of fiber or similar material inserted between the faces of the flange 29 and the adjacent faces of the annular ring 35 and the flange 33 on the coupling member 32.

The flange .35 is drawn with the'ring of fiber 36 by means of the nuts 37 on the stud bolts 34 so as to secure the fiber washers 36 in frictional engagement with the faces of the flanges 29'and 33. The coupling member 32 of this spindle is provided with a recessed portion forming a coupling box which engages with the Wabbler' 25 on one neck of the pinion 10 or with p the wabbler on one neck of the top roll 2.

In theoperation of my improved apparatus, both rolls are connected to the driving pinions so as to be independently driven, the bottom roll-3 being positively connected in the ordinary manner. connecting the flanged end of the spindle 28. The nuts on the bolts 34 are drawn up with suflicient tightness to frictionally hold the'opposing surfaces of the flange 29 and the annular ring-35 and the face-of the flange 33 on the into engagement the member 32 flange coupling member 32, in engagement with the annular fiber disksor' rings 36 and the friction clutch on the shaft 18 is moved into operative engagement with the pulley 21 so as to cause the pulley to positively rotate the shaft 18 and,' through the connecting gearing, to drive the pinions 10 and 11. The pinions 10 and 11 through the connecting mechanism independently rotate the rolls 2v and 3- during the'rolling operations. The rolls either have been or are then adjusted through the adjusting wheel 8 and the connecting gearing until set at the re-- quired distance apart, and the operation of rolling is then started.

When for any reason the surface speed-of one roll difiers' from that of the other roll and the surface speed of the metal being rolled, the frictional surfaces formed by the faces of the fiber washers or rings 36 contacting with the faces of the flanges 33 and 35 and the flange 29, will slip, and a relative axial movement of the coupling member 28 with the coupling member 32 will be effected, in this way avoiding slip of the surface of either roll on the surface of the metal being rolled, and equalizing the surface speed of the top and bottom rolls and the metal being rolled so as to prevent excessive strains and wear upon the gearing connecting mechanism. Such relative axial movement of the friction driving mechanism will be effected automatically as often as required in theoperation of the mill, the mill being otherwlse operated in the same manner as has been the practice heretofore. By tightening or loosening the stud bolts 34 the power transmitted frictionally from to the spindle 28 is increased and decreased to the desired extent.

The advantages of my invention will be apparent to those skilled in the art. The apparatus is simple and is easily kept in reair. By its use the surface speeds of the rolls of the mill are equalized and made uniform, regardless of the relative diameters of these rolls. The objectionable slip occurring between the face of one or the other a.

is-driven by a suit- .able motor (not shown) is started to rotate of the rolls and the surface of the metal being rolled is prevented, while excessive strains and wear, as well as possible break age or other damage to the connecting mechanism and undue strain upon the teeth of the driving pinions is preuented.

Modifications in theconstruction and arrangement of the parts may be made without departing from my invention. The frictional driving connection may be applied to the bottom roll instead of to the top roll, as shown and other changes may be made within the scope of the appended claims.

I claim 1 1. In a rolling mill, a pair of rolls, a source of power, an independent drive connection for each roll with said source of power, the drive connection of one of the rolls being divided into parts havinga frictional drive contact with one, another, substantially as described.

2. In a rolling mill, the combination of roll housings having bearings, a pair of rolls having necks mounted in the bearings and provided with Wabbler ends, a pinion housing, a pair of pinions mounted in the housing and provided with Wabbler ends, a

Wabbler spindle connection between the Wabmy hand.

' ALBERT J. JAMESON. 'Witnesses:

P. R. JOHNSON, H. C. WHITE.

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