US1478509A - Roll for rolling mills - Google Patents

Description

Dec. 25, 1923. 1,478,509

s. E. DIESCHER ROLL FOR ROLLING MILLS Filed Feb. 27, 1922 5 Sheets-Sheet 1 IN YEN T01? Dec. 25 1923.

S. E. DIESCHER ROLL FOR ROLLING MILLS 5 Sheets-Sheet 2 Filed Feb. 2'7 1922 FIELEI- z a vmuq b tAzLJ- wlnresaas Dec. 25, 1923.

s. E. DIESCHER ROLL FOR ROLLING MILLS Filed Feb. 27. 1922 5 Sheets-Sheet 3 INVENTOR WITNEGGES Dec. 25, 1923.

S. E. DIESCHER Filed Feb. 27 1922 5 Sheets-Sheet 4 Kg m Dec. 25 1923. 1,478,509

s. E. DIESCHER ROLL FOR ROLLING MILLS Filed Feb. 27. 1922 5 Sheets-Sheet 5v Fll3..11-

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Patented Dec. 25, 1923.

UNITED STATES 1,478,509 P TENT OFFICE.

SAMUEL E. DIESCHER, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOB TO S. DIESCHEB 6'0 SONS, A PARTNERSHIP OONSISTING OF SAMUEL S. DIESCHER AND AUGUST P.

DIESCHER.

ROLL FOR ROLLING MILLS.

Application filed February 27, 1922. Serial No. 538,424.

To all whom it may concern:

Be it known that I, SAMUEL E. DIESCHER, residing at Wilkinsburg, in the county of Alleghen and State of Pennsylvania, a citizen 0 the United States, have invented or discovered certain new'and useful 1mprovements in Rolls for" Rolling Mills, of which improvements the following is a specification.

In continuous mills wherein a plurality of pairs of rolls are arranged in tandem and spaced such distances apart that the rod, pipe, or other article being rolled will be in the bite of two or more pairs of rolls at the same time, it is the practice to so proportion the rate of rotation of the pairs of rolls that the pairs succeeding the entering or initial air shall have a speed higher than that of t e precedin pair proportional to the reduction effecte in the preceding pair. If articles to be rolled could be given the same degree of plasticity and each article to have the same degree of plasticity throughout its entire length, the adjustment of the rate of succeeding rolls might be accomplished. In ractice, however, conditions on which plasticity is dependent such as temperature and composition of the metal article to be rolled, vary to such an extent that only an approximate adjustment of rate of rotation is made, and provision is made for permittin the article to loo out between airs of re s, or the rolls to SllP on the artic e. Both of these actions are undesirable for many reasons, and in order to overcome them, rolls have been constructed with a positively driven body portion and an annulus rotatably mounted on the bod ortion, but adapted to be frictionally r1ven by the latter, the frictional en agement bein effected by clampin the s eeve between collars bearing against the ends of the sleeve and in positive engagement with the body portion. But on account of the constant wearing away of the contacting surfaces of the sleeve, and collars, thus necessitatin a continual readjustment of the collars, t is device was commercially impracticable.

The invention described herein has for its object the provision of means whereby an eflicient frictional driving connection may be established between the body portion of a roll and a reducing annulus loosely mounted on the roll, and whereby wear between contacting surfaces of the body portion and the annulus may be automatically compensated for. The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Fig. 1 is a side elevation of aportion of a continuous mill embodying my improvement; Fig. 2 is an end elevation of the same; Fig. 3 is a sectional elevation on a plane coincident with the axes of the pair of vertical rolls; Fig. 4 is a sectional view of an improved roll; Fig. 5 is a plan of a portion of one of the journals of the roll shown in Fig. 4; Fig. 6 is a transverse section on a plane indicated by the lines VIVI Fig. 5; Fig. 7 is a view similar to Fig. 4 illustrating a modification of the roll; Figs. 8 and 9 are transverse sections on planes indicated by lines VII IVIII and IXIX Fig. 7 Fig. 10 is a detail View on an enlarged scale lllllS- trating the intercalating ribs on the roll body and reducing annulus; Fig. 11 is a sectional elevation illustrating a further modification of the roll structure.

In the practice of the invention a mill employing the improved roll claimed herein would consist of a plurality of stands A of horizontal rolls and a pluralit of stands B of vertical rolls alternating with the stands of horizontal rolls as shown in Figs. 1 and 2. In the construction shown the vertical rolls are driven from a common shaft 1 through intermeshing bevel gears 2 and 3, the gears 2 being ke ed to the shaft 1 and the gears 3 to one o the pinion shafts 4 of each stand of rolls the pinion shafts being connected to the necks of the rolls by spindles 5 in the usual or any suitable manner. The gear wheels 2 and 3 of sucmessive stands of rolls are so connected that although the gears 2 on the common driving shaft 1 are rotated at the same speed, the pinions of successive roll stands and the rolls themselves will have a higher speed, such increased speed being approximately proportional to the elongation of the article due to reduction effected in the recedin pair of rolls. The horizontal rols are iven from the common shaft 6 in the same manner as the vertical rolls.

My improved roll consists of a body or supporting and driving portions and an annular or reducing portion. The body ortion 7 is provided at its ends with use 3 8 and 9, the neck 9 being made of a. diameter shifted along the latter.

and length suitable for size of rolls employed and having at its end a wabbler 10 or other suitable means for connection with the driving spindle. The neck 8 is made of such diameter as to permit of the reducing annulus 11 being slid into operative relation to the body ortion 7. The body portion 7 is provide with V-shaped peripheral ribs a and alternating grooves adapted to intermesh with correspondingly shaped grooves and ribs 5 formed in the inner periphery of the annulus 11. The annulus has an internal diameter measuring from the a ices of the ribs sufficiently greater than t e external diameter of the body portion 7 measuri from the apices of its ribs, to permit 0 the annulus being slid into position around the body portion and shown in Figs. 4 and 7. The annulus is held as against movement longitudinally of the body portion by a collar 12 on the body and a ring 13 on a sleeve 14 fitting around the neck 8, and packing rings 15 formed of brass or other suitable metal are interposed between the annulus and the ring and collar to form a tight joint to prevent the escape of lubricant from the interior of the annulus as hereinafter described and to prevent scale, etc. working in between the roll body and annulus. The sleeve 13 is secured to the neck in a manner to rotate therewith, but with fr'eedom to move longitudinally in any suitable manner, and is shifted to hold the annulus in position by a nut 17 on the threaded portion of the neck 8 or extension thereof and-it is preferred that a spring 18 or resilient washer 18 be interposed between the nut and the sleeve. Various constructions may be employed for so connecting the sleeve 14 with the neck that it will rotate with the neck and may be In the construe tion shown in Figs. 4, 5 and 6 the walls of the neck and sleeve are slotted in diametrically opposite sides, said slots 22 extending from the ends of the sleeve and neck and are adapted to receive radial lugs 23 on one face of a rin 24 slidable along the tube 25 threaded into t e end of the neck 8. The engagement of these radial lugs with the slots in the sleeve and neck will lock those parts as against independent rotation, but will ermit the sleeve to move longitudinally al dng the neck. The ring 24 is made with an external diameter slightl less than the internal diameter of the s eeve, which extends over and beyond the ring as shown in Figs. 5 and 6, and while not necessary it is preferred that ribs 26 be formed on the ring in alinement with the lugs 23 and extend into the slots in the sleeve. The sleeve is adjusted and pushed along the neck by a nut 17 screwing into the tube 25, the movement of the nut being preferably transmitted to the sleeve by a spring 18 and a washer 29 1s made for a longitudina rovided with an annular rib 30 adapted to ear against the end of the sleeve.

In lieu of the construction shown in Figs. 4, 5 and 6, the engagement of the neck 8 with the sleeve 14 may be effected by a spline or key 16, as shown in Fi 7 and 8.

In order to supply lubricant to relatively movable surfaces, an axial passage 19 extends thl'ough the neck 8 and a suitable distance into the body portion, and branch passages 20 extend from the axial passage through the body 7 to supply lubricant to the surfaces of the annulus and body, and to the exterior surfaces of the neck 9 and to the surfaces of the sleeve 14 and neck 8. The lubricant may be fed through the axial passage in any suitable manner, as for example, by charging the lubricant into an internally threaded shell 21 and screwing it onto the neck 8 as shown in Fig. 7. As the shell moves over the neck the lubricant will be forced therefrom and into the axial passage 19. Or the receptacle for the lubricant may be formed by the tube 25 from which the lubricant is forced into the passage 19 and branch passages by a plug 31 screwing into the tube as shown in Fig. 4.

In order to obtain maximum efficiency the surfaces of each of the ribs b on the annulus 11 should bear uniformly on the surfaces of adjacent ribs a on the body between which the annulus ribs project. In the construction shown the annulus is subjected to pressure tending to move it longitudinally of the body portion of the roll, a wearing away of the bearing sufaces at the end of the annulus and of the collar 12 or washer 15 would cause an unequal bearing of the surfaces of ribs 7) on the surfaces of adjacent ribs a on the body portion. In order to prevent any such unequal bearing of the ribs on the annulus against surfaces of adjacent ribs on the body Portion, provision movement of the annulus or a corresponding movement of the ribbed portion of the body of the roll. In the construction shown in Fig. 7 the ring is constructed to bear against a shoulder on the body of the roll, and the washers or packing rings 15 interposed between the ends of the annulus and the collar 12 and ring 13 are made resilient thereby permitting the annulus to be so moved longitudinally of the body 7 as to ensure practically equal pressure of the surfaces of the ribs of the annulus against those on the body 7.

The same uniformity of pressure of the ribs on one part against those of the other part can be attained by forming the ribs on a sleeve mounted on the roll body 7 in such manner as to rotate with the roll body and to move freely longitudinally thereof. To

.this end the ribs 0; are formed on a sleeve 32 adapted to fit closely around the body portion 7' but capable of being shifted lon gitudinally of the body, as shown in Fig. 11.

his sleeve is locked to the body so as to rotate therewith in any suitable manner, as for example, by extending the key 16 employed for locking the sleeve 14 to the neck 8 into ooves formed in adjacent surfaces of the Eddy 7 and sleeve 16. The washers 15 inter osed between the ends of the annulus an the collar 12 and ring 13 is made rigid or nonresilient so that the annulus will be held as against longitudinal movement, the sleeve 32 being, however, made shorter than the distance between the collar 12 and ring 13, so that it may be moved longitudinal in case the-ribs a and I) do not properly intermesh.

The ribs a and b on the roll body and annulus are so constructed and proportioned that friction between their contacting surfaces will be due not only to pressure acting radially, but also wedging action of the ribs on one member between adjacent ribs on the other member.

And further, the contacting surfaces of the roll bodies and the annuli of a pair of rolls are so designed and constructed in accordance with rules known in the art that the frictional enga ement of the roll body with the annulus wi 1 be sufficient to operate the annulus to effect the reduction desired from such pair. In case the annuli encounter greater resistance the roll body will continue to rotate their surfaces sliding along the surfaces of the annuli.

It is the general practice in the operation of continuous mills that each pair of rolls after the first pair are driven at higher speed than the precedin pair, such increase being proportional to t e rate of elongation resulting from reduction in the previous pass. Theoretically, the peripheral speed of rolls following the first pair should exceed or be greater than the rate of movement of the article as it comes from the bite of the receding rolls by an amount that 'PIOVldBS for taking in the lfnaterial at the exact speed of leaving the first pair of rolls. As such theoretical relations are not practically attainable, it is the practice in certain applications of continuous mills in order to prevent bending or looping out between rolls,

to give the succeeding pairs of rolls 21 peripheral speed approximately five per cent more or less greater than the rate of move ment of the article from the (prefieding il'olls,

, t ere wi l )e When driven at such a spec of the roll on the article a constant rubbin ll be subjected to undesirand the latter wi able tension. In the operation of a mill hav in rolls constructed as herein described the re] of bodies ofsucceeding stands of rolls will be driven at a higher speed than the movement of the article from the preceding stand, but the reducing annuli will not move any faster than the article with which it is in contact, as the roll bodies will slip on the annuli. There will be some tension on the article but only pro )ortional to the friction between the roll bodies and the annuli. As the interiors of the annuli are charged with a lubricant there will be a minimum wear due to thesliding movement of the roll bodies on the annuli.

I claim herein as my invention:

1. A roll for'rolling mills having in'combination a body portion adapted to be positively driven and having a peripherally ribbed surface and an annulus having an in ternal diameter greater than the external diameter of the body ortion and provided interiorly with ribs a apted to intercalate with the ribs on the body portion.

2. A roll for rolling mills having in combination a body adapted to be positively driven and havinn a peripherally ribbed surface, an annulus bavin'g the internal diametergreater than the external diameter of the body portion and provided interiorly with ribs adapted to intercalate interiorly with the ribs on the body portion, one of said roll elements being adapted to be shifted longitudinally by the other to ensure uniform pressure of the surfaces of the ribs of one element against the surfaces of the ribs on the other element.

3. A roll for rolling mills having in combination a body adapted to be positively driven and having a peripherally ribbed surface, an annulus having an internal diameter greater than the external diameter of the body portion, and provided interiorly with ribs adapted to intercalate with the ribs on the body portion, the ribs on the body and annulus being so constructed that ribs on one element will have a wed 'ng action between adjacent ribs on the ot er-element.

4. A roll for rolling mills having in combination a body portion adapted to be positively driven and having a peripherally ribbed surface and an annulus having an internal diameter greater than the external diameter of the body portion, and provided interiorly with ribs adapted to intercalate with the ribs on the body portion, means for closing the ends of the annulus and means for feedin a lubricant into the annulus.

5. A roll for rolling mills having in combination a body portion provided at one end with an extended neck and at its opposite end with a collar, and having peri heral ribs, an annulus having an internaliameter greater than the external diameter of the body portion and provided with ribs adapted to intercalate with the ribs on the bod ortion, a sleeve surrounding the exten ed neck, and means for shifting the sleeve longitudinally along the neck to hold the annulus against the collar.

- the 6. A roll for rolling mills having in com-- bination a bod portion provided at one end with an exten ed neck and with a collar at the opposite end and having peripheral ribs, an annulus having an internal diameter greater than the external diameter of the body ortion and provided 'with ribs adapte to intercalate with the ribs on the body portion, a sleeve movable along the neck of the body portion having a ring adapted to bear against an end of the annulus and to press the latter against. the collar, the ring and collar having a diameter greater than the internal diameter of the annulus, washers interposed between the ends of the annulus and the ring and collar respectively, and means for moving the sleeve along the neck.

7. A roll for rolling mills having in combination a bod ortion provided at one end with an ekten e neck and with a collar at the opposite end and having peripheral ribs, an annulus having an internal diameter reater than the external diameteiyof adapted to intercalate with the ribs on the body portion, a sleeve movable along the neck of the body portion having a ring adapted to bear against an end of the annulus and to press the latter against the collar, the ring and collar having a diameter greater than the internal diameter of the annulus, resilient washers interposed between the ends of the annulus and the ring and collar respectively, and means for moving the sleeve along the neck.

ody portion and provided with ribs.

8. A roll for rolling mills having in combination a body portion provided at one end with an extended neck and with a collar at the opposite end, and having peripheral ribs. an annulus having an internal diameter greater than the external diameter of the body portion and provided with ribs adapted to intercalate with the ribs on the body portion, a sleeve movable along the neck of the body portion having a ring adapted to bear against an end of the annulus and to press the latter against the collar, the ring and collar having a diameter greater than the internal diameter of the annulus, washers interposed between the ends of the annulus and the ring and collar respectively, and means for moving the sleeve along the neck, an axial passage extending through the neck into the body portion and having a branch passage extending radially through the body portion and means for forcing a lubricant through such passages into the annulus.

9. A roll for rolling mills having in combination a body portion having a sleeve so connected to the body portion as to rotate therewith and to move longitudinally thereof, said sleeve being provided with peripheral ribs, an annulus having an internal diameter greater than the external diameter of the sleeve and provided interiorly with ribs adapted to intercalate with the ribs on the sleeve.

7 In testimony whereof, I have hereunto set my hand.

SAMUEL E. DIESCHER.

Certificate of Correction.

It is hereby certified that the assignce in Letters Patent No. 1,478,509, granted December 25, 1923, upon the application of Samuel E. Dieschen of Wilkinsburg, Pennsylvania, for an improvement in Rolls for Rolling Mills. was erroneously described and specified as S. Diescher & Sons, a partnership consistin r of Samuel S. Diescher and August P. Diescher, whereas said assignee shonl have been described and specified as S. D'ieacher rfv Sons, a partnership consisting of Samuel E. Diesche-r and August P. Diescher, as shown by the record of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Olfice.

Signed and sealed this 18th day of March, A. D., 1924.

[smn] KARL FENNING,

Acting omm-issioner of Patents.

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