US1684643A - Method of making cold-rolled articles - Google Patents

Description

E, SLICK METHOD OF MAKING COLD RObLED ARTICLES Sept. 18, 1928.

Filed April 21. 1922 6:4; INVENT.OR. 5. m

Patented Sept. 18, 1928.

[UNITED STATES PATENT OF C EDWIN n. SLICK, or PITTSBURGH, PENNSYLVANIA.

METHOD OF MAKING COLD-ROLLED ARTICLES.

Application filed April 21, 1922. Serial No. 555,867.

Figure 1 is a sectional side elevation of one form of machine-adapted for carrying out my process; and

Figure 2 is a plan view of the rollers and cage therefor.

My invention relates to the class of coldrolling and is designed to provide a new method and new article of manufacture in this class of work. Hereto-fore, cold rolling had been. carried out by ordinary rolls, through which the work, such as shafting strips, etc, is passed, while cold,to impart the desired dense smooth cold-rolled surface.

My invention is designed to widen the field for cold rolling and to provide articles, such for example, as tapered disks for wheel bodies, having the highly desirable cold rolled surface either throughout the surface or in annular or circular zones thereof, the cold rolling being carried out in such circular or annular Zones. v

In carrying out my process, I preferably employ a work or blank support on which the blank is laid, and employ a thrust member which is forced toward the blank during the operation and employ between the members a system of rolling elements which move in substantially annular or circular paths over the blank. I thus impart a highly. desirable cold-rolled finish to the surface portion of the blank, and if desired, to both surfaces at the same time by employing rolle-rson the work.- snpporting member, as well as between the blank and the thrust member, as illustrated in Figure 4 of my Patent No. 1,423,268, of July 18,1922. I

I will now describe one machine for carrying out my invention, the preferred type of machine being shown in my patent referred to. This patent shows different types of machines, of which I have selected the first type as an example.

In the drawings, the blank, which may be aidisc or blank of any desired shape cut from a plate or, sheet, may be carried on a work support 2. In thetype of operation chosen for this example, this blank is spread out and tapered from the central portion toward the edge portion, preferably in the samegeneral type of machine, and while the blank is heated in the ordinary manner. If the blank is formed in this manner, it is thereafter rolled in the samemachine while cold to give the cold-rolled finish. In the type shown, the work support is slightly dished and the blank is cold rolled by a plurality of rollers 3, pressed against the blank by thrust plate 4, which is rotated relatively to the work support 2. The rollers 3 which are preferably solid and imperforate are shown as loosely mountedina cage, indicated generally by numeral This cageis shown as comprising two semicircular blocks 6, the inner edges of which are concave to fit around and guide the rollers 3. A band 7 fits around. the two blocks (S'and holds them together. The thrust plate 4 is mounted on arotating head 8, and

is preferably made of hardened steel to with cage 5 released. Then, if it is desired to take loosening the nuts 18.

A centering stud 15 centers the thrust plate 4 on the head 8 and a pin 16 holds the-thrust plate and head againstrelative rotation. The cage 5 is heldso that it can treely rotate on its supporting ring "10. Sufficientclearance is provided between the cage 5 and the work so that the cage may turn freely relative thereto.

oil the thrust plate 4, it can be taken off by The work-supporting plate 2 is made of hardened steel or cast chilled iron and is supported on a head 17; It is centered on the head by means of a hollow stud 18 and is pre vented from rotating relatively to the'liead 17 by means of a pin 19. A spring-pressed stud 20 projects tl'iro-ugh the work support 2 and into the hole drilled inthe center of the disk for the purpose of centering the disk on the work support. The blank may be solid,

in which case the centering stud will not be needed. 1 f

During the cold-rolling operation, the two heads 8 and 17 are forced againsteach other and relatively rotated so that the rollers '3 roll around in circular or annular'paths over the plate. The rollers are frictionally driven by contact with the thrust plate and the blank which rotate relatively to each other. shown in the drawings, the rollers at each side of the axisof rotation are preferably so spaced that the rollers at one sidewill not track with the rollers on the other side. This causes the rollers to cover all portionsxof the annular zone acted upon andgive a. smoother and better finish.

of rollers on opposite sides of the center are separated b a spacer 26, formed on the blocks 6 of the rol er-supporting cage. This spacer block 26 is a little to one side of the axis. of rotation. As shown in the drawings, there are nine rollers at the left of the axis of rotation and eight at the right. This arrangement insures that the radius from the axis of rotation to the point of separation between two rollers atone side of the center is equal to the radius from the axis of rotation to the middle of a roller on the opposite side.

The end faces of the rollers 3 are preferably slightly bulged at the center, this bulgmg being somewhat exaggerated in the drawings for the purpose of illustration.

The rollers therefore contact with each other only in their central portions, so that frictionbetween them is reduced. Each roller is permitted to assume its own speed, the speed of the rollers, of course, differing among themselves. i Y

It is found to be advantageous in work of this character to employ rollers of small diameter, because the small diameter roller has a smaller surface of rolling contact withthe work. Therefore, the thrust of the rollers against the work'is concentrated in a smaller area and the blank rolled out more efiiciently than would be the case if larger diameter rollers were used. Since the rollers 3 are subjected to a considerable thrust, it is desirable that they be made solid. The use of the cage 6 permits small solid rolls to be used. The cage holds the rollersin align, ment and prevents'any roller from moving sidewise out of its end to end alignment with the other rollers. WVith the cage it is unnecessary to bore the rolls to receive any shaft for holding them in alignment or supporting them, thus permitting the rolls to be inade solid and of a maximum strength.

The head 8 is mounted in the cross pediment of the machine so asvto rotate. As shown in the drawings, the head 8 is provided with a vertical shaft 30, extending through a hushed bearing 31, while a work plate 32 forms a vertical thrust bearing for theehea'd 8. The bearings are lubricated through the oil groove Splined to the head of the shaft 30 is a gear 34, which is driven by apinion 35. The pinion 35 is carried on a shaft 36, which, at its lower end, has a bevel gear 37, driven by a bevel gear 38 on a shaft 39, which is driven' through the The head 17, which carries the work support 2, is vertically movable and is forced by hydraulic pressure against the rollers 3. The head 17 has a plunger 45, which enters a hydraulic cylinder 46, supplied with fluid under pressure through a pipe 47. An adjustable collar 48 on plunger 45 limits its "upward movement. A' pin 51 extends from As shown in the drawings, the two series thehead 17 into a stationary part of the machine to prevent the head 17 from rotating.

Incarrying out my improved method with this machine, the blank while cold lies on the Work support 2, and fluid is admitted under pressure to the hydraulic cylinder so as to force the work support and the blank against the'rollers. The. head 8 with the thrust plate 4 is rotated as the relative end changed and rollers employed to carry the I blank, in which case, the blank will be coldrolled on both faces at the same time.

It is obvious that the blank may be hot.- rolled to the desired shape in this machine, before it is cold-rolled, or the blank may be given its shape in any desired way previous to th s coldrolling operation. The type of machine employed may be widelyvaried, and many other changes may be made without departing from my invention.

The advantages of the inventionare apparent, since a highly desirable annular or circular cold-rolled surface may be imparted to articles, such as wheel disks, circular saws,

etc.

I consider myself the first to make a cold: rolled disk of varying thickness, whether rolled by circular or annular rolling or not. .I claim:

1 In the method of cold-rolling circular articles, the steps comprising supporting the article to be rolled and subjecting at least one side face thereof to the substantially uniform action of independently movable float-r ing rollers traveling concentrically over the article. I

2 In the method of cold-rolling articles, the steps comprising supporting the circular one side face thereof to the; action of a plurality or series of independently movable rollers traveling CODCQIllZ-IlCflllYOVBI' thearticle with the paths of the rollers in one series staggered relatively the other series. A

3. In the method of cold rolling circular articles, the steps comprising supporting. the

article to be rolled and subjecting at least'one to the pathsof those of 120 C article to be rolled and subjecting at least side face thereof to the action of indcpendtioning rollers intermediate the article and ently movable solid rollers travelling con supporting means, and "causing said rollers centrically over the article. to travel concentrically over the article With 10 4. In the method of rolling circular artilndependent movement. 5 cles, the steps comprising supporting an arti- In testimony whereof I have hereunto set cle to be rolled, providing roller supporting my hand.

means in spaced relation to the article, posi- EDWIN E. SLICK.

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