US369277A

US369277A - dayis

Info

Publication number: US369277A
Authority: US
Publication date: 1887-08-30
Anticipated expiration: 1904-08-30

Description

(No Model.) 2 Sheets-Sheet 1. J. DAVIS.

MANUFACTURE OF ANGLE IRON. No. 369,277. Patented Aug. 30, 1887.

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(No Model.) 2 Sheets-Sheet 2. J DAVIS.

MANUFAGTURE OF ANGLEIRON.

Patented Aug. 30, 1887.

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UNITED STATES PATENT Oriana.

.IOlEIh DAVIS, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO OLIVER BROTHERS & PHILLIPS, OF SAME PLACE.

MANUFACTURE OF ANGLEJR ON.

SPECIFICATION forming part of Letters Patent No. 369,277, dated August 30, 1887.

Application filed May 18, 1887. Serial No. 238,642. (No model.)

To aZZ whom it 72mg concern:

Be itknown that 1, JOHN DAVIS, of Pittsbnrg, in the county of Allegheny and State of Pennsylvania, have invented a new and use ful Improvement in the Manufacture of An,- gle-Iron; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a front elevation of a set of rolls designed for the manufacture of angle-iron, and Fig. 2 is a similar view of finishing-rolls embodying the principles of my invention.

Like symbols ofroference indicate like parts in each.

The prior state of the art in rolling angleiron is illustrated in Fig. l. The rolls a, b, and c are provided with a number of grooves or passes, numbered in order 1 2 34 5, through which the billet or bar of iron is passed in succession to form the finished angle-iron. At each of these passes it will be noticed that the parting of the rolls is at the edge or corner of the angle-iron, and there is consequently a tin or roughness on the finished iron at the edges, which detracts from its appearance and is a disadvantage when the iron is used in exposed or conspicuous places.

The object of my invention is to obviate this objection to the manufacture of angle-iron as heretofore practiced, and to provide means forgiving to the edge of the angle-iron a regularly-finished shape.

To this end it consists in the subjection of the angle-iron, after it has been rolled as above described, to the action of rolls,whereby the iron is rolled and shaped at the edges, the parting of these rolls being arranged at the side and not at the edge of the iron. These finishing-rolls d, e, andf are shown in Fig. 2, and there are two passes, 7 and 8, in the first of which the grooves kin the roll at are shaped so that the edges of the angleiron shall eugage the bases of the grooves 72, and that the parting of the rolls shall be at the side of the angle, the preferable shape being that which I have shown, wherein the outer sides of the grooves are less divergent than the sides of the angle. In this way the stress of the rolling is brought to bear on the edges of the iron. The bases of the grooves are preferably curved, as shown, so as to give the angle-iron a rounded and symmetrical shape, though this, is not necessary, as a square, oval, or any other desired shape may be given. In passing through this groove the angle-iron is rolled and so shaped on its edges as to efface the fins or irregularities produced by the first set of rolls; but it is somewhat distorted. To restore it to its proper angle shape it is passed through the pass 8, wherein the sides and not the edges are rolled.

The finishing-rolls shown in Fig. 2 may be adjusted to shape angle-iron of diifercnt width and thickness by simple separation 'of the rolls.

The grooves of the rolls may be somewhat altered in shape without departing from the principle of my invention, which is set forth in the following claims.

I claim- 1- An improvement in the manufacture of angle-iron, which consists in rolling the iron into the proper angle shape and then rolling it on the edges, whereby the edges are made regular, substantially as and for the purposes described.

2. An improvement in the manufacture of angle-iron, which consists in rolling the iron laterally into the proper angle shape, then roiling it on the edges in a pass whereof the outer sides of the grooves are less divergent than the sides of the angle-iron, and then straightening the iron by rolling it laterally, substantially as and for the purposes described.

3. Finishing-rollsforrollingangle-iron,having a pass constituted by rolls, one of which has grooves whose bases engage the edges of the angle-iron, the parting of the rolls being above the bases of the grooves, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 13th day of May, A. D. 1887.

J OHN DAVIS.

W'itnesses:

W. B. Conwrn, JNo. K. SMITH.