US1544317A - Apparatus for and method of disk rolling - Google Patents

Description

H. Y. HILDEBRAND APPARATUS FOR AND METHOD OF DISK ROLLING June 30, 1925.

Filed Sept. 30 1919 QINVENTOR EPHHP nllllllllll 31- V 7 Han)" ATTORNEY Patented June 30, 1925.

1,544,317 NITED STATES PATNT FFHCE.

HENRY Y. HILDEBRAND, F JOHNSTOWN, PENNSYLVANIA, ASSIGNOR, BY MESNE uASSIGNMENTS, TO BETHLEHEM STEEL PRODUCTS COMPANY, A CORPORATION OF PENNSYLVANIA.

APPARATUS FOR AND METHOD OF DISK ROLLING.

Application filed September 30, 1919. Serial No. 327,509.

To all whom it may concern:

Be it known that I, HENRY Y. Hmon- BRAND, a citizen of the United States, residing in the city of J ohnstown, in the county of Cambria and State of Pennsylvania, have invented certain new and useful Improvements in Apparatus for and Method of Disk Rolling; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a machine for rolling disks from suitable blanks and with r special reference to the manufacture of circular disks which are thicker at their center portions and tapered thinner toward their edges,-or thicker at the center and tapered toward the edges and with a comparatively thick edge portion, for use in making various constructions. and particularly the disks of automobile wheels and other vehicles, or for agricultural implements, etc.

My invention consists generally of apparatus for firmly clamping and holding a disk by the central portion thereof, while permitting it to rotate freely on its axis and inserting the outer portion of the same between a pair of suitably shaped opposed rolls, which are tapered or shaped otherwise, to conform to the desired cross section of the disk. The clamping means may be moved to or from the rolls in such a way that the disk or portions thereof are grasped by the rolls when the rolls are rotating'to thin, taper, or otherwise shape the disk or blank, and at the same time increase the diameter of it to the required degree. The blanks may be of any reasonable thickness and diameter and are preferably circular disks, although they may be of other shapes, if desired.

Having thus given a general description of my invention, I will now, in order to make the matter more clear, refer to the annexed sheet of drawings in which like characters refer to like parts Figure l is a vertical longitudinal sectional elevation through the disk clamping and rotating mechanism with the rolling mill shown in side elevation; Figure 2 is a vertical transverse sectional elevation taken on the line lllli of Figure 1; Figure 3 is a diagrammatic view illustrating certain different positions of the disks during the working operaton of the machine. Figure 4: is a vertical sectional elevation through the top clamping head or jaw drawn on a larger scale; and Figure 5 illustrates a modification of the clamping heads or jaws.

Referring now to the characters of reference on the drawings :--l is the base of the machine on which the various arts are mounted, 2 indicates the rolling mill in en era] the rolls of which are geared toget er, as illustrated, and driven by an electric or other motor, these rolls being carried in suitable housings with adjustable bearings,

the rolls 3 and 4 being shown as overhangmg or projecting outwardly from one of the housings so that a blank or disk can easily be inserted within the tapered or other shaped space between the rolls. 3 is the top roll, 4 is the bottom roll, 5 is an adjustable base on which the clamping and rotating mechanism are mounted, 6 being the slideways thereof., 7 are adjusting screws adapted to move and hold the sliding base in the position desired on the fixed base, this adjustment being for the purpose of adjusting the axis of the disk in relation to the axes of the rolls in such a way that the rolling action may have a tendency to pull the material outwardly toward the circumference of the disk at the same time that it shapes and thins the materials. and this may be accomplished to different degrees in dif- "ferent positions oi the sliding base in relation to the roll axis. one of the positions being illustrated in Figure 3. 8 is a secondary base portion which is mounted on the sliding base 5 which is adapted to be moved longitudinally thereof on the slideway 9 by means of the feed-screw 10 and its attached hand-wheel 31. Mounted on this secondary base 8 is a revoluble portion 11, which is mounted on ball bearings 12. 13 is the up: per portion of the rotatable frame mounted 'on thepivot bolt 14 which passes through the portions 8. ii and 13, and is secured by a not as illustrated. the portions 11 and 13 being secured together by a key cooperating with them and the bolt 14. The lower end of the bolt is provided with a bevel gear 15 mounted thereon. which meshes with a bevel pinion 16 secured on the shaft 17, which is provided with a large hand-wheel for the purpose of rotating the bevel pinion and causing the rotation of the head 13 and its attached portions. Attached to thev upper portion of 13 is a fluid-pressure cylinder 18 having a cross-head 19, which is connected with-the top clamping head 22, the portions of the clamping heads which contact with the blank or disk being mounted on the ball bearings 20 so that they can rotate with the rotation of the'blank or disk. 21 is the bottom clamping head, 23 is a water inlet pipe or passage for the top clamping head and 24 is the outlet pipe for the same, and 25 is a recess in the face of the clamping head. 26 isacentering pin on which the disk is mounted, which pin is mounted on the lower clamping head and projects upwardly in the hole previously formed in the blank for the purpose of centering it on the clamping heads.

The disk in the process of rolling *is indicated as 27 and before rolling, this disk is of smaller diameter-and may be of uniform thickness. 29 are water inlet pipes for the bottom clamping head and 28 are the outlet pipes for the same, the water connections to the interiors of the clamping heads being for the purpose of supplying cooling water thereto in order to keep them cool or cold, as the blank'or disk with which they contact is previously made red or white hot prior to rolling between the rolls 3 and 4.

Referring to Figure 5, 32 is a slightly modified form of upper clamping head with a square recess 33 therein, into which. the

J upper square portion of the centering pin 34 is adapted to project, the lower portion of. said centering pin beingcylindrical in shape and secured to the bottom clamping head 21 by a screw-thread or otherwise, as convenient The square form of the upper portion 35 which fits in the square recess 33 has the eiiect of locking the two clamping heads together so that when they are rotated by the disk they will move together and not have a tendency to drag upon, mar or tear the disk or blank 27.

Although the disks may be rolled when. the lines of the axes of the rolls 3 and 4 intersect the axis of rotation. of the blank or disk, I prefer to arrange the apparatus in'such a way that the axes of the rolls are slightly removed from the axis of rotation of the disk, for in that way the rolling action will have a tendency to knead the material toward the circumference of the disk and further tend to increase its diameter,

as is necessary when it is being rolledof tapered or reduced form. This is shown in Figure 3 in which. 3 is the upper roll, the dotted line 38 indicates the roll axis, 36 is the position of the blank before the rolling begins, 37 is the position of the disk at the completion of the operation after it is withdrawn from the rolls, 39 indicates the swing ing path of the blank or disk, and 40 is the original position of the center on which the disk is revolved.

During the operation of the apparatus when the rolls 3 and 4 are forming the disk, these rolls exert a considerablev pull upon said disk, which would have the result of forcibly rotating the upper portion of the apparatus around the pivot bolt 14, and in order to resist this strong pull of the rolls I provide a stop or locking means shown in Figure 2 as follows:

Secured to the rotatable portion 11 is a stop-piece orbracket 41. the end of which is curved .or recessed and'adapted to contact with the end of the screw 43, which screw is adapted to operate within the internally threaded nut 46, which is provided with trunnions 47 and mounted on the angle 42 and is secured therein by another member or stirrup 4.4, this screw 43 being provided with a hand-wheel 45, as illustrated. One end of the'angle 42 is slidably secured to the roll housing nearest the rolls by passing through a stirrup or other construction, se-

cured to the roll housing and the other end of the angle is fastened on the secondary base 8. As the disk is fed into the rolls,

the rolls pinch and bite the same, having a tendency to rotate the stop piece and attached portions. but by setting the screw at or in advance of any predetermined position this tendency to rotate is prevented, and if any slight adjustment may be needed when rolling, this may be accomplished by the operator moving the hand-wheel 45 in the desired direction.

I may also provide a retarding and stop mechanism in the form of a dash-pot operatingwith air or fluid and controlled by a cataract and valve.

The operation of my apparatus is as follows :The hand-wheel 30 is turned in such a way as to rotate the clamping head clear of the rolls, the piston in the clamping cylinder is withdrawn upwardly, the blank is placed, on the lower clamping disk with the central hole fitting over the central pin 34. The piston of fluid-pressure cylinder 18 is then moved downwardly with force and clamps the blank between the top clamping head 22 and the bottom clamping head 21, whereupon the hand-wheel 30 is turned, which causes the clamping heads and the blank or disk to swing in the circular path 39 as indicated in Figure 3, after which the hand-wheel 31is turned in such a way as to feed the disk into the bite of the rolls 3 and 4 while they are revolving. and as these rolls revolve the hand-wheel 30- is continually turned so as to gradually feed the disk into the rolls and produce the form illustrated, or any other forms which may be made by this apparatus.

I may also set the base 8 inrequired po- Sition before rolling and then cause the blank to be SWun into the bite of the rolls by rotating the c amping heads toward the rolls without sliding the apparatus by the hand-wheel 31.

I may also set the stop or locking means to event revolution of the disk and then feed the disk into the bite of the rolls by advancing the apparatus with the hand wheel 31. I

A reversal of these operations will withdraw the disk in its finished form, ready for a new blank and the operations proceeds as before.

Although I have described and illustrated my invention in considerable detail, I do not wish to be limited to the exact and specific details thereof as shown and described, but may use such modifications in, substitutions for, or equivalents thereof, as are embraced within the sco e of my invention, or as pointed out in t e claims. i

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a disk rollin apparatus, the combination of a pair- 0 tapering rolls, a rotatable portion provided with a pair of clamping heads rotatably mounted thereon, fluid pressure means for projecting and retracting one-of said clamping heads, and means whereby the axis of the clamping heads may be maintained in a predetermined position with reference to the roll axes.

2. In a disk rolling apparatus, the combination with a pair of rolls, of a rotatable portion provided with a pair of rotatable clamping heads mounted thereon, said clamping heads being hollow and supplied with fluid cooling means.

3. In a disk rolling apparatus, the'combination with a pair of rolls of a rotatable head portion, provided with. a pair of rotatable clamping dies, and a retarding stop adapted to abut against said rotatable por axes, thereby shaping and expanding the blank as desired.

5. In a disk rolling apparatus, outboard rolls and means for rotating the same in combination with a movable frame, a pair of rotatable clamping heads mounted thereon, chambers in said clamping heads provided with fluid cooling means, fluid pressure means for advancing and retracting one of said clamping heads, and means for advancing or retracting saidmovable frame whereby the translation of said clamping healds is caused to follow a predetermined p 6. In a disk rolling apparatus, the combination of a' pair of rolls, a movable frame. means for adjusting the same transversely of the roll axes, a air of hollow vfluid cooled,

rotatable clamping members mounted on said frame and adapted to grip the central portion of a blank and means for advancing and retracting the frame whereby the blank is presented to the bite of the rolls in a predetermined location and direction.

In witness whereof I hereunto afiix my signature.

HENRY Y. HILDEBRAND.

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