US1539432A - Mill for rolling tapered disks - Google Patents

Description

May 26, 1925'. 1,539,432

O. c. SCHOENWERK MILL FOR ROLLING TAPERED DISKS Original Filed Nov. 22, 1921 e Sheets-Sheet 1 1*? K wi B INVENTOR. 0770 C. Cl-IOENWEE/f.

TTORNE Y.

May 26,1925. 1,539,432

OOOOOOOOOOOO RK I N V EN TOR. J .J 0770 C ScHOE/VNE/Pm May 26, 1925 1,539,432

0. c. SCHOENWERK MILL FOR ROLLING TAPERED DISKS Original Filed Nov. 22, 1921 6 Sheets-Sheet 6 INVENTOR. Ba 6 0770 C. 5CH0ENNEIK 0.0M BY Patented May 26, 1925.

UNITED STATES PATENT OFFICE.

OTTO C. SCHOENWEBIK, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR '1'0 BUDD WHEEL COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

MILL FOB ROLLING TAPEBED DISKS.

' Application flled November 22, 1921, Serial No. 516,937. Renewed October 9, 1924.

To all whom it may concern:

Be it known that I, O'rro (J. SCHOENWERK, a citizen of the United States, residing at Philadelphia, Pennsylvania, have invented certain new and useful Improvements in Mills for Rollinglap'red Disks, of which I declare the following to be a full, clear, and exact description.

This invention relates to an improved mill for rolling tapered disks. The invention relates, more particularly, to a new and improved machine which ,may be utilized in the rolling of square or rectangular blanks, along radial lines from the centre to the periphery of the blank, in order to cause the periphery of the blank to approach a circle and to taper the blank symmetrically with respect to the centre thereof.

In the application for United States Letters Patent for a machine: and method for rolling tapered disk's, Serial No. 308,548, filed July 3rd, 1919, by'Edward G. Budd and Emil Ibach, there is described and claimed a machine and method by means of which a substantially square blank of uniform thickness may be converted into a substantially circular blank which is tapered from the centre to the periphery, by rolling the square blank successively along a plurality of different radii extending from the centre of the blank to its periphery. The present invention has to do with improvements upon the machine disclosed in said prior application and it relates to an improved mill for use in carrying out certain steps of the method or process of rollin tapered disks set forth and claimed in said prior application.

One of the objects of my invention is to provide means for preventing the clashing or striking together of the working faces of the rolls as the blank or blanks pass from between them.

Another object of my invention is to prodetailed description to follow. My invention is clearly defined and pointed out in the appended claims. A structure constituting a preferred embodiment of my invention is illustrated in the accompanying drawings,

forming a part of this specification, in which: Fig. 1 is a view in front elevation of a pair of rolls embodying my invention.

Fig. 2 is a sectlon through the central ortions of the rolls, on the line A-A of ig. 1, showing the rolls in position for insertion of the blanks.

Fig. 2 is a section through end portions of the rolls, on the line BB of Fi 1, showing the parts in position correspon ing to that of Fig. 2

Fig. 3 is a section on line A- A of Fig. 1, through the central portions ofthe rolls, showing the rolls in such position that the working faces have just engaged central portions of the blanks.

Fig. 3 is a section. on the line BB of Fig. 1 but showing the parts in position corresponding to that of Fi 3. "Fig. 4 is a section t ough the central portions of the roll, on line AA of Fig. 1

but showing the parts in the position they occupy when the blanks have been partially rolled and the high points of the cams are in contact.

Fig. 4 is a section, on the line BB of Fig. 1, but showingl the high points of the cams in contact wit each other'corresponding to the position of the parts in Fig. 4*.

Fig. 5 is a section through the central portions of the rolls, on line A-A of Fig. 1, but showing the parts in the position they occupy as the blanks leave the rolls.

Fig. 5 is a section, on line B--B of Fig. 1, but showing the parts in position correspondingto the position of the parts in Fig. 5

Fig. 6 is a section through one of the inserts, taken on the line 6--6. of Fig. 1. i

Fig. 7 is another section through the inseit' taken on the line 77 of Fig. 1, and

Fig. 8 is another section through the insert, taken on the -line'8--8 of Fig. 1.

an the blanks are relieved of "In the drawin the same reference nu merals refer to t e same parts throughout the several views and the Sectional views are taken lookin in the direction of the arrows at the en s of the sectional lines.

In carrying out; the method or. process of rolling tapered disks disclosed; in the pending application of Budd and -Ibach, to

which I have referred, the eccentric working faces on the rolls have "been provided by means of inserts rigidly fastened in the body ortions of the rolls and usually made of chilled steel castings, so that they will stand u under the very great pressure to which t ey are submitted. In connection with the operation of this method or process, I have discovered that, when the blanks pass from between these workin faces, the rolls, which vhave been separate by the blanks, suddenly move toward each other and the inserts strike or clash against each other withresults which are sometimes very in- 'urious to the working faces of the rolls. hfy invention comprises means for preventing thisstriking orclashin together of the inserts or working faces. accomplish this b gradually removin the pressure upon t e ,working faces, be ore the blanks pass from bet-ween them, and gradually shifting the pressure from the working faces to collars on the rolls which are normally in rolling contact with each other. In carr ing out my invention, I provide a pair 0 cooperatmgrolls mounted in a frame with the upper roll under pressure and the rolls driven in the usual manner. Themountmg of these rolls is all in. accordance with the usual rolling mill practice; Each of these-- cooperating rolls I may provide with a pair of collars, which are normall in rolling'contact-with each other, and with eccentrlcally disposed working faces which are so positioned with reference to the axis of these rolls that, when the faces engage a blank or blanks, the contacting collars are forced away from each other so that the rolling ressure is transmitted from one working ace, through the blank or blanks, to the other working face. As the rolls revolve, the blank orfblanks gradually pass between the rolls in contact with the working faces. I provide the collars with eccentric portions, for instance, cams fixed in the collars, which 'contact' with each other and are so formed and positioned that they engage each other before the blanks pass from between the working'faces so that the pressure is graduall shifted from the faces to the'collars 7 pressure beforethey pass from the, rolls. In the drawin I have illustrated the cooperating rolls; 0 a rolling mill constituting one embodiment of my invention. There are two of these rolls, 10, each of which com prises a body portion, 11, eccentrically dis- .the body portion.

posed with reference to-the axis of the roll and cylindrical collars 12, at the ends of.

These rolls may be mounted in a framework and driven and pressure applied to themin accordance with the mostapproved rolling mill practice and I have not shown these details as they form no part of my invention. The body portion, 11, of each roll, is provided with a recess 13, in which there is set an insert, 14;, which may be secured in place by the clips, 15,

which are fastened to the bodyportion, 11,

by the bolts, ,16. These inserts are referably made of chilled steel so as to withstand successfully the very great pressure to which they are subjected 1n use.

ach insert, 14, has a portion raised above 1 the base thereof and forming the working face of the roll. In this case, the working face comprsises a portion, 17, which is adapted to engage the portions of the blank around the center thereof, so as to grip the blank firmly between the rolls, and a central. portion, 18, which is segment shaped as shown in Fig. 1, and comprises the portion between the dot and. dash lines inthat view. This portion, 18, is slightly concave, as I,

will point out hereinafter more fully. This T segment-shaped portion, 18, is surrounded bythebeveled, edge ortions, 19 and 20, as igs. 6, 7 and 8: The;

shown in Fig. 1 and insert, 14,'is set in the body, 11, of the roll, so that the working face pro ects slightly beyond the cylindrical surface defined by the two collars, 12, at the ends of the roll. This surface is indicated in Figs. 2 3, 4 and 5, by the dot and dash circle, The insert, 14, 1s set in the roll so that the workingface thereof is eccentric to the axis of the roll so I that the distance frormthe axislof the rdll, to the working face gradually increases from ortion, 17, to the beginning of the beve ed ortion, 19. As I have indicated above, t e segment-shaped portion, 18, of the working face, is slightly concave, being ground to form a concave surface, the axis of' which extends transversely to the axis of the roll. In Figs. 6 and 7, the line O--G indicatesa true lane and shows the amount of concavity or ivergence of the upper surface-of portion, 18, from a true plane. The insert is beveled, at 21, at the front edge of portion, 17 and a notch, 22, is provided to accommodate the ends of. the tongs. The features of construction, which I have described-so far in this s ecifi-:"ation,are not of m invention and I have described them mere y to make the relation of my invention collar. A block, 26, is welded tothe collar, 12, against one end of the cam, so as to form a shoulder which will take the large endwise thrust exerted by the cam under the heavy pressures to which it is subjected. The cam is retained in placeby the screws, 27 and 28, as shown, for instance, in Fig. 2

The operation of my invention will appear from a consideration of Figs. 2 2 3 3 4', 4 5 and 5 in pairs and represent sections through the working faces ofthe rolls and through the collars. Figs. 2 and 2 represent the rollsv body portions of the rolls, there is sufficient space provided to permit the easy insertion of the blanks and tongs. The rolls are turning in the directions indicated by arrows in these views. In Figs. 3 and 3 the position of the rolls is shown at the point when theworking faces begin to engage the blanks, 29, and it will be seen that the portions, 17 of the working facesare just engaging the central portions of the blank. Inasmuch as these working faces project slightly beyond the cylindrical surfaces defined by the collars, 12, and indicated in the dot and dash lines in Fig. 3f, the rolls are separated so that the collars, 12, are no longer in contact with each other, as shown in Fig. 3 and the pressure is transmitted from the working face, 17 of-the upper roll, throughthe blanks, 29, to the working face of the lower roll.

rows, the working faces will exert a rolling pressure upon the blanks to decrease the thickness thereof and cause the tperiphery to approach in shape, the are 0 a circle.

Figs. 4 and i show the position of the rolls after they have continued their movementto practically the end of the rolling opertrated may be changed and altered in many ation and it will be noticed that the blank has been elongated and tapered, as shown in Fig. 4". The blanks have not, however, passed as yet from between the working faces and it will be observed that, if it were not for, the presence of my invention, when the blan :s, pass from between the working faces of the rolls, the upper roll would drop suddenly so that the inserts would strike or clash violen ly against each other with und zahle results. However, while the insert lliiVQ been moving toward each These views are.

the rolls continue to revolve in the direction indicated by thearother and acting on the blanks, the cams, 25, have also moved towards and into ongagement with each other and, at the instant when the parts are in position shown in Figs. 4 and 4 the high points of the cams, 25, are in contact with each other and relieve the working faces of the pressure, since the curve with which the working face .drops away from the high point is more abrupt than the curve from the high point of the cam, 25, to the cylindrical surface of the collar, 12. The result is that the pressure is gradually shifted from the working faces to the collars and the'blanks are relieved of pressure while they pass from betweenthe working faces. Referring to Figs. 5 and 5 the blanks are shown com pletely free of the rolls and it will be seen that the cams, 25, gradually permit the rolls, to resume the normal position in which the cylindrical collars, 12, are in rollingcontactll with each other. 1 I believe that the foregoing description of the operation of this machine makes my invention very clear. By providing the cams, 25 in the collars, 12, I provide means which prevent the striking ofthe working faces together, as the blanks leave the rolls,

and insteadof the sudden movement of therolls toward each other, which would otherwise result, ,I have provided means which permit this movement. to take place gradually. I have described a specific roll construction in which the working faces are provided on the inserts and are formed in a peculiar manner, but my invention is not to be restricted to a combination in which the working faces are formed as described. My invention' will findutility in many situations where the working facesof the rolls are formed differently. I have found that the use of cams inserted in the collars is desirable because the cams may be made of harder material than the rest of the collar, 1

if desired. This is not essential, however. The elevation of the cam may be changed by removing'the cam, 25, and substituting a different wedge, 24, for the one in place.

These particular details of mounting of the cam may be varied, however, without departing from the broad spirit of my invention.

Iam aware that the construction illusparticulars without departing from the broad spirit of my invention and, therefore, I claim my invention broadly, as indicated by the appended claims. I

- Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In an apparatus of the character speci-' fied, the combination of a pair of cooperat ing rolls provided with working faces so d'isposed with reference to the roll axis as to blank revolution ing rolls provided with separate the rolls when the working faces engage a blank, whereby to exert pressure on said blank, and interengaging means on said rolls maintaining the rolls separated during a predetermined portion of their to relieve the pressure .on said blanks.

2. In an a. paratus of the character specified, the com ination of a pair of cooperating rolls provided with rtions normally in rolling contact with eac other and working faces so disposed with reference to the roll axis as to separate said contactingportions when the working faces engage a blank, thereby exerting pressure on said blank, said contacting portions being so formed as to come into contact once more, while the blanks are between said faces, to relieve the pressure on said blanks.

3. In an apparatus of the character specified, the combination of a pair of cooperating rolls provided with ortion's normally in rolling contact with eac other and working faces so disposed with reference to the roll axis as to separate said contacting portions when the working faces engage a blank, thereby exerting pressure on said said contacting portions being so formed as to come into contact once more, the blanks pas from between said faces, to relieve the pressure ,while the blanks. pass from between said faces;

fied, the combination of a pair of cooperatrtions normally contact with eac other and ecceng faces so disposed with refer in rolli tnc wor ence to the roll axis as to separate said con tacting portions when the working faces engage a lank, thereby exerting pressure on said blank, said contacting portions having I eccentric surfaces so positioned as to C011:

tact with each other before the blanks pass from between said faces, to relieve the pres- ;sure while the blanks pass from between mid faces. I 5. In an a paratus of the character specilied, the'com ination of a air of cooperating rolls each provided wit a collar at each thereof and aneccentric working face between said collars, the collars ofieach pair of rolls being normall in rolling contact with each other, sai working faces being so disposed with reference to the roll axis as to separate said collars when the working faces engage a blank, thereby exerting pressure on said blank, said collars having eccentric portions contacting before the blanks pass from between said faces so as to relieve the pressure while the blanks pass from between said faces.

6. In an apparatus of the character specified, the com ination of a air of coo atin rolls provided with co lars norm '1 in no ling contact with each other and eccentric relieve the blanks from pressure while they.

points of said cams contacting the roll was as to separate said contacting collars when the working faces engage a blank, thereby exerting pressure on said blank, saidcol-lars having eccentric rtions 7 contacting before the blanks ass" ronf between said faces so as to gradually shiftthe pre$ure from said facesto'said collars and ass from between said :faces. e715 7. In an apparatus of the character speci- Y fied, the combination of 'a'pair of cooperat ing rolls provided with collars normally inrolling contact with each other and eccentric working faces so disposed with reference to the roll axis as to separate said contacting collars when the working faces engage a blank, thereby exerting pressure on said 7 blank, and cams carried by said collars and having high points ada ted to contact before the blanks pass om between said faces ,so as to graduall shift the pressure from said faces and relieve the blanks from. pressure while they pass from between said aces. I

8. In an apparatus of the character specified, the combination of a, pairof cooperat-- ing rolls, each roll hav' a cylindrical collar ateach end thereo' and an eccentric. body portion between the collars, said'coL-D-l lars being normally in rolling contact with 1: each other, said body portions having 4;. In an apparatus of the character speciworking faces so disposed with reference to the roll axis as to separate the contacting collars, when said faces engage a blank, thereby exerting pressure on said blank, and a cam carried by each collar, the high with each other at predetermined positions to shift the pressure from said faces and relieve the pressure on said blanks while they pass from between said faces. I A

9. In an apparatus of the character specified, 'the combination of a pair of cooperating rolls, each roll having a c lindr'ical 001- lar at each end thereof, provi ed with a recess and an eccentric body portion between the collars, said collars being normally in rolling contact with each other, said body portions having working faces so disposed with reference to the roll axis as to separate the contacting collars, when said faces engage a, blank, thereby exertin pressure .on said blank, and a cam secured in each of the recesses of said collars and rojecting slightly above the cylindrical surface of the collar, the high points of said cams contacting with each other at predetermined sitions to shift the pressure from said aces and relieve the ressure on saidblanks while they from etween said faces.

10. In an apparatus of the character specified, the combination of a pair of cooperating rolls, each roll having a cylindrical collar at each end thereof, provided with a recess, and an eccentric body portion between the collars, said collars being normally in rolling contact with each other, said body portions having working faces so disposed with reference to the roll axis as to separate the contacting collars, when said faces engage a blank, thereby exerting pressure onsaid blank, a wedge positioned in thebottom of each of sald recesses and cams se- 10 cured in position upon said wedges and projecting slightly above the cylindrical surfaces of sa1d collars, the high points of said cams contacting with each other at predetermined positions to shift the pressure from said faces and relieve the pressure on said blanks while they pass from between said faces.

In testimony whereof, I afiix my signature. I

OTTO C. SCHOENWERK.

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