US1279219A

US1279219A - Scourer for rolling-mills.

Info

Publication number: US1279219A
Application number: US1435515A
Authority: US
Inventors: James B Baird; C D Robertson; William Goudy; Mary E Baird
Original assignee: NAT ROLL AND FOUNDRY Co
Current assignee: NATIONAL ROLL AND FOUNDRY Co; NAT ROLL AND FOUNDRY Co
Priority date: 1915-03-15
Filing date: 1915-03-15
Publication date: 1918-09-17
Anticipated expiration: 1935-09-17

Description

UTORS.

C. D. ROBER IN VE N TOR .7E/mfp' 5. a/Jm,

WITNESSES:

.a oonromrron or omo.` l

' soounnn ron :corinne-MILLS.

lTo all whom t may concern:

Be it knownl that I, JAMES B. BAIRD, a

citizen of the United States, residing at Avonmore, in the-'county' of 'Westmoreland and State of Pennsylvania, have'invented a new and useful Scourer for Rolling-Mills, of

' which the following is a specification.

At the present time sheet iron is prbdiced by passing heated bars between heavy rolls until the metal has been reduced to 'desired gage. These rolls are machined and polished yan their working faces are initially substan j tially concentric with their axes and the upper roll is generally so mounted as to be capable of some vertical movement at eachv passage'of material. The `working faces of the rolls. determine the character of the product and -it has, therefore, long been recognized thatlthese working'surfacess'hould be maintained in'awell polished condition in order to produce the'highest character of product.

v During the operation the `metal becomes rolls .upon the pitted by this action to aconsiderable extent,

oxidized in s ots and there are thus pro ducedflakes of) metallic oxid of varioussizes. Owing to the great pressure exerted by the hot metal, some of these oxid Hakes stick to the-working faces of the rolls and, during the rotation of. the rolls, come again between the rolls and the metal. Some v o these .particles remain stuck to the rolls fora considerable number of rotations and finally the working faces of the rolls become the quality of the product gradually deteriorating until the operatives are forced to suspend operation to permit the scouring or repolishing ofthe rolls.

Heretofore this scouring, or repolishing i has been accomplished by placing a scouring vover t e stationary .bar forming a 'operationfthe board is swun blockpof abrasive material, such for instance as carborunduxmu on .one end of. a board and, b using this card as a lever placed part of the frame of the rolls, and by applying the vweight o'fjone or twovo'peratives to the outer end of the board, forcing the scouring block against the surface of the roll. During this and shifted laterallyl on vits fulcrul'n. v is operatlon serves to remove the adhering 'particles from the rolls but, because the operation interferes with the roductive operation of rolls and because t e operatives are generallyA Specication of Letters Patent.

vof vertical adaptability Vthrough the; greater Patented Sept. i7, 1918.

Application led March A15,1915. Serial No. 14,355.

working upon a tonnage basis, the cleansing operation is delayed generally to such an Vextent that. the rolls are badlyr pitted and vconsequently there must need be not only the scouring operation, but also an actual resurfacing of the rolls. y Owing to the crudityI -of the apparatus and the amount of weight applied, the scouringv operation results in the v formationof spiral striee in the surface 'of the rolls and `the operation requires the expenditure of from one .to two and one-half hours of each shiftof eight hours. After the rolls have been cleansed in this manner, the spira-l striee, althoughnot deep, nevertheless serve to slightly tear the-surface of the metal passed between the rolls so that exaggeratedl diagonal striae are produced -in the surfaces of the product ofthe machine. operation of the rolls, they become' heated During the and they inevitably become distorted to some extent from true cylindricity which, however, does notint'erfere with the proper cooperation of the rolls owing to the possibility,

of the upper rolls;

- The object of my present invention is to produce an apparatus which'may be applied tothe rolls of a rolling mill in such manner their initial polished condition 'withoutin- `terferin to any extent with the concurrent use of t e rolls in the production 'of sheet metal, the apparatus being of such character that no appreciably-spiral 'striae will be formed upon the surface-of ,the roll., y

The accompanying drawings illustrate my invention. Figure lv is a side` elevation of a 4pair of rolls equipped with my attachments;

' as'to be effective in maintaining the rolls in Fig. 2 -a fragmentary front elevation;

3 an end elevation on a larger scale ofthe ofthe attachment; thereof; and Fig. 5 pinufor thescouring vmember carrier Fig. 4 a front elevation a perspective detail of the nut carrier.

In the drawings,ll0 indicates the main housing or frame of a rolling vmill of ordinary type, l1 the upper roll and 12 the lower roll.' Applied to each of the rolls isone of my attachments. Each? of these attachmentsI comprises a main shaft 13 which is provided portion of its length with an endless screw 13 comprising righthand and lefthand portions connected at their ends in a common manner. The shaft the plunger l16 serves to normally maintain the shaft 13 in driving connection with its shaft 19. Each shaft 19 is provided with a beveled gear 21 which meshes with a bevel gear 22, the. two ried by a vertical shaft 23 journaled in the two brackets 20 and driven by any suitable means such, for instance, as a small electric motor 24 mounted upon a bracket 254 which may be conveniently attached to the frame 10. J ournaled on the shaft 13 is a frame 26 having pockets 27 at its outer end for, the reception of bearing blocks 28 which are detachably held in place 29 and bolts 30. The blocks 28 form bearings for the shaft of a rotary scouring mem#v ber 31. l have found in practice that a satisfactory scouring member is a medium grade of carborundum. One end of the shaft of the scouring member 31 carries a gear wheel 32 which, when the parts are in place', meshes with an intermediate gear 33 which in turn meshes with a gear 34 which is splined upon the shaft 13', the gear 34 having a rotatable, axially interlocking connection 35 with the frame 26. That portion of the frame 26 which is journaled upon shaft 13v carries a pivoted nut pin 37 of common form to lie within the endless screw threads 13 in a. well known manner, the arrangement being such that rotation of the shaft 13 will serve to recrrocate the frame 26' and-)at the same time lengthwise of the sha t will serve to rotate the scouring member 31. Journaled in the frame 10 parallel with eac y shaft 13 is a track bar 38 which carries avtrack 39 corresponding to the axial conformation of the adjacent rolls 11 or 12. The track bar 38 is connected to a lever 40 which in turn is connected -to a segment lever 40 through the medium of a spring connection 41 and thelsegment lever 40 may be held in any desired position of adjustment by means of Frame 26 carries a roller 43 which restS upon the track 39, the arrangement being such that the frame 26 is biased by its weight so as to maintain the roller 43 in contact with track 39 and so that a shifting of the track39 will shiftthe scouring member to wardor from the adjacent roll and; when the scouring member is shifted into engagement with the roll, it will be yieldingly maintained in that engagement by the spring connection 41..

carried by a spring may beveled gears 22being car? by clamping plates,

a segment 42.

Owing to the character' of the material which adheres tothe member is apt to lose its eiiciency because the particles stick to the scouring member and in order to obviate this difficulty, I pivot upon frame 26 a supplemental frame 45 which at one end carries a common form of cleaning roll 47 which is a knurled or spirally be thrown into engagement wit circumference of the scouring member by h the between the scouring member and the cleaning roll being very light and just suflicient to keep the scouring roll in roper condition.. At times the cleaning member may be withdrawn, if desired. y

1n mounting the scouring members relative to the rolls l have found it desirable to arrange them so that the direction of Arotation of the scouring member will be opposite to that of the adjacent roll so that the direction of movement of the contacting portions of the peripheries of the roll and scouring member will be the same and lso that the circumferential speed of the scouring member will be a little less than the circumferential toothed metal roller and this roller' rolls, the scouringv means of the adjusting screws 49, the contact A speed of the roll, .thus producing a slight l rearward or dragging component which I have foundvto be exceedingly edective in loosening and removing the particles' adhering to the surface of the roll.-

rlhe spring connection41 is comparatively lightso that the scouring member is held against the roll with only enough pressure to insure a light contact following the variations of the roll from 'true concentricity, the

intention being not to materially 'grind the surface of the roll but to merely maintain a sufficient contact of the scouring member upon the roll to insure the removal of adhering particles.

ln practice because, by making the pitch of the threads 13i comparativelyv slow,

rolls is comparatively so slight that` any sti-ite which may be of the roll are so nearly circumferential (the circumferential speed of the roll being comparatively high) that there will be no appreciable tearing action of such striae upon as itv passes between the` the movement of` the scouring member longitudinally of the I have found that a scouring i member several inches in'length is desirable l found upon the surface the way either of the operative or the materiah. so that the use of the rolls in the production of sheet metal may be the usual use 'without interference and, as the entire surrac face of each roll is traversed by the scouring member at frequent intervals, the said surfaces are at all times maintained in the most effective condition for the production of sheets of the highest quality without the n ecessity of interrupting the operation of the rolls and consequently cutting down the tonnage of the output. The longitudinal movement of the scouring member upon the rolls maintains the scouring member in proper condition and prevents the formation of circumferential grooves therein.

I claim las my invention:

l. The combination with a rolling mill, of

a rotary scouring member arranged ladjacent; theworking face of a roll of said mill, means for holding said scouring member in contact With the said working face, means for automatically reciprocating said scouring member longitudinally of the roll, and means for rotating said scouring member in a direction opposite to' the direction of rotation of the contacted roll but at a slightly slower surface speed. y

2. The combination with a rolling mill, of a shaft journaled substantially parallel with one of the rolls and provided with an endless thread comprising righthand and lefthan-d portions, a scourer frame journaled upon said4 shaft and provided with a nut pin traversing said thread, a rotary scourer member journaled in said frame, and rotative driving connections between said scourer member and shaft.

3. The combination with a rolling mill, of a double threaded shaft journaled adjacent a roll, a carrier mounted upon said shaft, means carried by said carrier for engaging the thread of the shaft to cause reciprocation of the carrier upon theshaft, a gear splined upon the shaft and axiallymovable thereon with the carrier, a rotary scouring member j ournaled in the carrier, connections between said rotary scouring member and the gear whereby rotation of the threaded shaft will rotate lthe. scouring member, a track arranged adjacent a roll and supporting the carrier, and a yielding support for said track.

4.' The combination witha rolling`mill, of a double threaded shaft journaled adjacent a roll, a carrier mounted upon said shaft, means carried by said carrier for engaging the thread of the shaft to cause reciprocation of the carrier upon the shaft, a gear member.

ofthe carrier upon the shaft,

` tions between the "shaft sha-ft will` rotate the scouring member, arotary cleansing member arranged adjacent member, a carrier for said the scouring swingmg cleansing member, and means for said carrier to swing the cleansing member into and out of contact with the scouring 5. The combinationwith a Irolling mill, of a double-threaded shaft journaled adjacent a roller, a carrier mounted upon said shaft, means carried by said carrier for engaging the thread of the shaft to cause reciprocation a gear splined upon the shaft and axially movable thereon with the carrier, a rotary scouring member journaled in the carrier, connections between said rotary scouring member and the gear v'whereby rotation of the threaded shaft will `rotate the scouring member, and means for holding the scouringmember in contact with a roll.

6. A scouring device for rolls comprising a rotary threaded shaft, a carrier mounted upon :said shaft, a-.connection between said v carrier andlthe threads'of the shaft to cause axial movement of the carrier by rotation of the shaft, a scouring member rotatably mounted inthe carrier, and driving connecand scourer producing rotation of thescourer by rotation of the shaft. 7. A scouring device for rolls comprising a` rotary threaded shaft, ay carrier mounted upon said shaft, a connection between said carrier and the threads of the shaft to cause axial movement of'the carrier by rotation' of the shaft, a scouring member rotatably mounted in the carrier, a gear splined' upon the shaft and connected to the carrier to partake of its axial movement, and driving con# nections between said gear and the scouring member.

In witness whereof, I, JAMES B. BAIN), have hereunto set my hand at Avonmore, Pennsylvania, this 27th day of February, A. D. one thousand nine hundred and fifteen. JAMES B. BAIRD. Witnesses:

J. S. STRAWN, D. H. SLONAKER.