US968921A - Tire-mill. - Google Patents

Description

A. W. CARROLL.

TIRE MILL. APPLICATION IILED MAR. 28, 1906.

WITNESSES:

ATTORNEYS rut NORRIS FIIIRS to run! UNITED STATES PATENT OFFICE.

ALEXANDER W. CARROLL, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO CHROME STEEL WORKS, OF CHROME, NEW JERSEY, A CORPORATION OF NEW JERSEY.

TIRE-MILL.

Specification of Letters Patent.

Patented Aug. 30, 1910.

Application filed March 28, 1906. Serial No. 308,444.

To all whom it may concern:

Be it known that I, ALEXANDER IV. CAR- ROLL, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Tire-Mills; and I do hereby declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates generally to tiremills (a term applied generically to all mills for rolling rings, and not restricted to mills for rolling locomotive tires and the like) and particularly to universal tire mills adapted for rolling rings of dilferent breadth or width of face, and consists in means for preventing the work from creeping up on the roll during the process of rolling, and in other features, as hereinafter more fully described and particularly pointed out in the claims.

Tire mills of the class to which my invention relates comprise a main or driving roll, which usually acts upon the outer face of the work; an inner roll, which presses the work against the main or driving roll, together with suitable idler rolls, and, in the particular class of mills to which my invention is especially intended to be applied, edge rolls, by which the side faces or edges of the work are rolled simultaneously with the rolling of the inner and outer faces thereof. In the operation of a rolling mill of this type it has been found that at times there is a tendency for the work to creep up on the main or driving roll, thus giving to the edges of the work an irregular or wavy outline, and practically ruining the work. In the case of a mill intended for producing one or, at the most, only a few standard sizes and sections of rings, this difficulty might be obviated by the use of collared rolls, though at the expense of frequent changing of the rolls with change from one size of work to another. But in a mill intended to be universal, that is to say, to produce at. will any size or section of tire or ring within its capacityand the particular mill referred to is intended to be such a universal millthe use of collared rolls to prevent creeping of the work is quite impracticable, and some device for preventing creeping, capable of instantaneous adjust ment to any size or shape of ring or tire in the mill, and capable likewise of following the work as it gradually spreads under the action of the mill, must be provided.

The objects of my invention are, to prevent creeping of the work during the rolling, to permit practically instantaneous adjustment of the device to all sizes of rings being rolled, to permit the ready removal of the device to facilitate access to the driving roll, and generally to make the device simple, reliable, easy to adjust, easy to remove, and inexpensive.

I will now proceed to describe my invention with reference to the accompanying drawings, in which one form of device embodying my invention is illustrated, and will then point out the novel features in claims. In these drawings I do not illustrate the complete tire mill, as the tire mill per 86 is not of my invention and forms no portion of the present invention, and since the general nature of such tire mills is well known to those skilled in the art. I illustrate only such portions of the tire milland these in the main diagrammatically as need to be shown to permit comprehension of my invention.

In the said drawings-Figure 1 shows a central vertical section of a portion of a universal tire mill such as referred to, showing in central vertical section my adjustable stop applied thereto, and the mechanism for operating said stop. Fig. 2 shows a front view of the said stop and the operating devices therefor, in place on the mill. Fig. 3 shows diagrammatically a horizontal section on the line ww of Fig. 1, and indicates in dotted lines the location of the said stop. Figs. 4-8 are detail views, Fig. 4 showing a horizontal section on the line g 3 of Fig. 6, Fig. 5 showing a View of the shoe looking from below upward, Fig. 6 showing a front view of the shoe and its slide, Fig. 7 showing a side view of the same parts and Fig. 8 showing a detail section of the shoe, and illustrating particularly the hardening of the face thereof.

Referring now to the drawings, 1 designates the main or driving roll, 2 the center or pressure roll, 3 and 4 edge rolls and 5, 5, 5, 5 are idler rolls which center the work. In the particular mill illustrated, the work is rolled while in a horizontal position, and consequently the axes of rolls 1 and 2 are vertical, and the axes of rolls 3 and 41 are horizontal; but this is not the only possible arrangement. Suitable means, not necessary to illustrate or describe here, are provided for driving the main roll 1, and the lower edge roll 3. Other suitable means, likewise not necessary to illustrate or describe, since they are well known to those acquainted with mills of this type, are pro vided for raising and lowering the center roll 2, and for moving it toward and away from the main roll 1. Still other means not necessary to illustrate or describe, for similar reasons, are provided for moving rolls 3 and 4 toward or away from roll 1 and for moving roll 4 toward or away from roll 3; and means are further provided for pressing the idler rolls 5, 5 yieldingly against the work. All such mechanisms are necessary attributes of a universal tire mill of the class to which my invention is applied, and are known to those acquainted with such mills.

In the operation of such a mill, the inner roll 2 is lowered, an annular ingot or blank of proper size and at proper rolling temperature is placed within the circle bounded by the idler rolls 5 and is gripped at the edges by the edge rolls 3 and 4t and the inner roll 2 is then raised through the hollow center of the ingot. Roll 1 is then rotated, and at the same time roll 2 is caused to press the blank against roll 1, said blank being thereby caused to revolve. The blank is then rolled in the well-known manner. As above stated, it has been found in operating a mill of this type, there is at times a tendency for the blank being rolled to creep up on roll 1 during the rolling. To prevent this, I provide an adjustable stop in the form of a shoe, 6, secured to a slide 7 mounted in ways 8 in a saddle 9 secured to the frame of the mill. The slide may be moved up and down by any suitable means. I have indicated for the purpose a screw 10 driven by an electric motor 11, this being a very suitable arrangement, since the screw holds the stop absolutely rigid, permitting no yielding thereof under pressure, and since the motor may be controlled readily from the main controlling platform of the mill, and will respond instantly to rotate the screw in either direction; but I do not limit myself to this or to any particular method of driving the screw, or to any particular method of or means for moving the stop up or down. Vhatever device be employed for adjusting the stop, it should be one which is capable of rapid operation while the mill is in operation, so that the stop may be brought down to or close to the surface of the ingot as soon as the latter is placed in the mill, and may be moved upward as the ingot gradually spreads under the action of the rolls, keeping in contact with, or nearly in contact with, the surface of the work during the rolling thereof.

As shown, the saddle 9 .is readily removable, being held in place by bolts 12 the heads of which work in slots in the frame of the mill. This construction permits the shifting or even the removal of the saddle 9 and slide 7 to facilitate access to or re moval of the main roll 1; it also permits adjustment of the stop with reference to the main roll 1.

One feature of my invention relates to the shape of the shoe 6, and the connection thereof to the slide 7. As shown partic ularly in Figs. 4t and 5, both the shoe 6 and slide 7 are cut out or concaved at the back, so as to fit up closely against the main roll 1; and the shoe 6, while of considerable length, so as to cover a considerable portion of the surface of the work, is also concaved in front, so as to permit a close approach of the inner roll 2 to roll 1. It is desirable that the shoe 6 be removable from the slide 7, as said shoe is subject to wear, and requires renewal from time to time, and also because it may at times be desirable to change the material of this shoe with change of the material rolled, though in general I prefer to use a steel shoe. For this purpose and to permit ready assembling of the shoe 6 and slide 7 with relatively little machine work or fitting, I construct these parts as follows: Slide 7 is provided with ribs 15, and is further provided with ears 1G in rear of which are recesses adapted to receive corresponding ears 17 of the shoe 6. The bolts 13 pass through these ears. The bottoms of ears 1G and the bottoms of ribs 15 are finished, but between said ribs 15 is a recess adapted to receive a projection 18 of the shoe 6. This projection is finished at the sides and fits closely against ribs 15,, thus interlocking the shoe 6 with the slide 7 against endwise movement of the shoe with respect to the slide. The upper surface of shoe 6 abuts directly against the bottoms of cars 16 and ribs 15, pressure upon the shoe being transmitted therefore directly to the slide 7 without passing through the bolts 13. Said bolts therefore act merely to hold the shoe in place and have no stress upon them other than that due to the setting up of their nuts, during the operation of the mill.

As above stated, I prefer ordinarily to make this shoe 6 of steel, and it may be either a casting or a forging or may be worked down from a solid block. In order that the face of this shoe may be of hard steel while the backing of the shoe may be of low carbon steel, which is tough and at the same time easy to work, I preferably cast the shoe of low carbon steel and then by the well known cementation process, or other process of recarbonization, increase the percentage of carbon in the face portion of the shoe so as to make it capable of being hardened; and I then harden the shoe. However, this is not absolutely necessary. In Fig. 8 I have indicated by different sectioning the hard and soft portions of the shoe.

hat I claim is 1. In a mill for rolling rings, tires and the like, the combination with annulus-rolling means, of an adjustable stop in cooperative juxtaposition thereto and adapted to engage an annulus while the latter is being acted upon by said rolling means for preventing creeping of such annulus.

2. In a mill for rolling rings, tires and the like, the combination with annulus-roll.- ing devices of a stop in operative relation therewith and movable in a direction substantially parallel to the axes thereof, said stop arranged to engage the edge of the work during the rolling thereof.

3. In a mill for rolling rings, tires and the like, the combination with annulusroll ing devices comprising main and center rolls, one of which is movable bodily toward the other, of a stop in proximity to the main roll and adjustable longitudinally with respect thereto, said stop arranged to engage the edge of the work.

at. In a mill for rolling rings, tires and the like, the combination with annulus-rolling devices comprising main and center rolls, of a stop located between said rolls and movable longitudinally with respect thereto, said stop having concave surfaces in front and rear to permit its close approach to both rolls and to permit close approach of the rolls with respect to each other.

5. In a mill for rolling rings, tires and the like, the combination with annulus-rolling means of an adjustable stop, in cooperative juxtaposition thereto and adapted to engage an annulus while the latter is being acted upon by said rolling means, said stop comprising a removable shoe constituting the portion of the stop adapted to contact with the work.

6. In a mill for rolling rings, tires and the like, the combination with annulusroll ing means, of an adjustable stop secured thereto, in cooperative juxtaposition thereto and adapted to engage an annulus while the latter is being acted upon by said rolling means, said stop comprising a removable shoe having ears fitting into corresponding recesses of the main portion of the stop, and interlocking the shoe thereto.

7. In a mill for rolling rings, tires and the like, the combination with a frame and annulus-rolling rolls, of an adjustable stop arranged in cooperative juxtaposition thereto and adapted to engage an annulus While the latter is being acted upon by said rolling means and a saddle having guides for said stop, said saddle removably secured to the frame of the mill.

8. A mill for rolling rings, tires and the like, comprising in combination cooperating annulus rolling reducing rolls, mounted to rotate about substantially vertical axes, guide rolls, and an adjustable stop arranged to act upon the edge of an annulus in proximity to the point of action of the reducing rolls, for preventing creeping thereof.

9. A mill for rolling rings, tires and the like, comprising in combination cooperating annulus rolling reducing rolls arranged to rotate about substantially vertical axes, edge rolls arranged to rotate about substantially horizontal axes and an adjustable stop arranged to act upon the edge of an annulus in proximity to the point of action of the vertical reducing rolls, for preventing creeping thereof.

10. A mill for rolling rings, tires and the like, comprising in combination uncollared smooth surface annulus rolling reducing rolls, and an adjustable stop in cooperative juxtaposition thereto and adapted to engage an annulus while the latter is being acted upon by said rolling means for preventing creeping of the work.

11. A mill for rolling rings, tires and the like, comprising in combination vertical uncollared smooth-surface annulus rolling re ducing rolls, edge rolls, and an adjustable stop in cooperative juxtaposition to said annulus rolling rolls and adapted to engage an annulus While the latter is being acted upon by said rolling means for preventing creeping of the work.

In testimony whereof I aflix my signature, in the presence of two witnesses.

ALEXANDER W. CARROLL.

Vitnesses:

R. PALM, F. BECHMAN.

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