US629718A - Guide for rolls. - Google Patents

Description

No. 629,7!8. Patented July 25,1899; I

W.. GARRETT.- GUIDE FOR ROLLS.

Application filed June 24, 189B.)

NITED STATES WILLIAM GARRETT,OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF TO JOHN C. ORO MWELL, OF SAME PLACE.

GUIDE FOR ROLLS SPECIFICATION forming part of Letters Patent No. 629,718, dated July 25, 1899.

Application filed June 24, 1898. Serial No. 684,362. (No model.)

To (ZZZ whom it may concern:

Be it known that 1, WILLIAM GARRETT, of Cleveland, in the county of Ouyahoga and State of Ohio, have invented a new and useful Improvement in Guides for Rolls, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 shows in front elevation a rolling mill having guides constructed in accordance with my invention. Fig. 2 is a vertical section on the line II II of Fig. 1.

The object of my invention is to make it practicable to roll metal of round cross-section and of large diametersuch, for example, as is used for shaftin-g, &c.in the same way and with the same facility as is used in rolling bars of small section. I-Ieretofore the work of rolling such large bars has been done 1 by what is known as rolling by hand that is, the rolls have been provided with round grooves, and in entering the piece from one pass to the other the bar had to be turned each time at a right angle in order that at each pass a fin formed at the preceding pass might be eifaced. It was further necessary in such operation for the workmen to hold the piece during its passage through the rolls in proper position in order to prevent itfrom turning down, as is apt to occur owing to the roundness'of the groove. Round bars of less diameter than two inches have generally been rolled by guides, in which the operator onters the piece between perfectly-fitting guides, and after it has been inserted in the guides he may release it, as the guides themselves will hold it in position. It is evident that if a round bar, say, six inches diameter were required, this method could not be followed, because of the closeness of the guides and the difficulty of introducingthe heavy metal thereinto, although it dispenses with a good deal of unnecessary labor owing to the Weight of the section and the intense heat given off'by the bar. It is also well known that in rolling round bars by hand there is a limit to the length of the bar to be rolled owing to the diificulty there is in holding the piece up in its proper shape while passing through the round grooves without guides, while in rolling by guides there is practically no limit to the length that can be obtained. For instance, in rolling rods a round rod can be rolled over two thousand feet long, whereas in rolling by hand it is rarely that bars are rolled to exceed thirty feet long.

My invention makes the use of guides, with their attendant advantages, applicable in the manufacture of round bars of large section, thus rendering their manipulation easier and cheaper and less laborious, and thus increasing the output. clearly, we will suppose that I have a reversing rolling-mill, upon which I desire toroll, say, round bars about six inches in diameter.

In order to explain this I may with myimprovement take an ingot that will weigh about five thousand pounds, more or less, reduce it down to a square about six and three-fourths inches in cross-section, enter it into oval-shaped groove, then from that oval-shaped groove into a round groove, through which it is finished, between a pair of guides. Instead of using stationary guides, as heretofore, I employ guides one of which at least is movable toward and from the other, and I use a freely-movable wedge acting on the movable guide and actuating mechanism under the control of the operator, whereby the wedge may be moved freely in either dimetal piece or freed therefrom. When the piece is introduced, I open the guides to permit its introduction by hand or by the use of suitable feeding appliances, and when the piece has been introduced the guides are closed upon it in order to hold it in proper position.

In the drawings, 2 2 represent the rolls of a two-high mill, and 3 3 are guides, which are set opposite the pass of said rolls. Both of these guides may be movable; but, as shown in the drawings, the guide 3 is fixed and the guide 4 is movable horizontally toward and away from it. This motion is effected by 8o rection and the guide closed at will upon the Q suitable mechanism, which may be a handlever or a motor, such as the cylinder 5, hav-.

the guide and the other side against a stationary frame or box 7. When the wedge is raised, the guides are brought together. When the wedge is lowered, the guides are free to be separated. It will be understood that the inclination of the wedge may be reversed, if desirable, or instead of a wedge other devices for connecting the motor with the guide may be employed, the only requisite being that there shall be a device, such as a motor or lever, by which the motion of the guide may be positively effected.

The guides may be employed not only with a two-high mill, as shown in the drawings, but on a continuously-rotating three-high mill.

When the bar is to be introduced into the rolls, the guides are opened, and by means of the feed-rollers or other mechanism the piece is introduced thereinto. Where the rolls are stationary, the piece is brought into contact with the rolls, the guides then closed, and the rolls started; but where, as in a threehigh the reverse direction to free the guide; substantially as described.

In testimony whereof I have hereunto set my hand.

WILLIAM GARRETT.

WVitnesses:

THOMAS W. BAKEWELL, G. I. HoLDsI-I'IP.

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