US250627A - Machine for straightening - Google Patents

Description

(No Model.) 2 Sheets-Sheet 2.

M. BLAKEY.

MACHINE FOR STRAIGHTENING, ROUNDING, AND FINIS TU'B I c. No. 250,627. Patented .6,1 l.

UNITED STATES PATENT OFFICE.

MILDRED BLAKEY, OF ETNA, ASSIGNOR TO SPANG, OHALFANT & 00., OF ALLEGHENY COUNTY, PENNSYLVANIA.

MACHINE FOR STRAIGHTENING, ROUNDlNG, AND FlNlSHING TUBES, &c.

SPECIFICATION forming part of Letters Patent No. 250,627, dated December 6, 1881.

Application filed July 18, 1881.

To all whom it may concern:.

Be it known that 1, MILDRED BLAKEY, of Etna borough, county of Allegheny, State of Pennsylvania, have invented or discovered a new and useful Improvement in Machines for Straightening,Rounding, and FinishingPipes, Tubes, and Similar Articles; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which-like letters indicating like parts Figure 1, Sheet 1, is a top plan view of my improved machine. Fig. 2, Sheet 2, is a sectional view taken in the plane of the line w :r, Fig. 1. Fig. 3 shows an end elevation of the machine. standards or housings by which the rolls are supported and adjusted; and Fig. 5 is a sectional view of such standard, taken lengthwise ofthe machine in the plane ot'the line g y,Fig.4.

My invention relates to a machine for straightening, rounding, and finishing pipes, tubes, and similar articles; and it consists in certain combinations of cylindrical rolls arranged parallel and geared to rotate in the same direction, their surfaces moving at different velocities, with avertically-movable supporting device for bold ing the pipe or tube in position to be operated on by the rolls, and for permitting discharge of the pipe or tube when desired, and means for adjusting the rolls and giving them the requisite motions, as hereinafter described and claimed.

In the drawings, A and B represent two parallel cylindrical rolls having a length equal to or in excess of the pipe P to be operated on. These rolls are supported at either end by housin gs G, each of which consists of a standard, 0, and two divergent arms, 0 0. These arms have pivot-connection with the standards by means of eyes 6 and pivot-bolts E, the latter passing through the eyes of the arms and through holes 0 in the tops of the standards. Toward their upper ends the two arms 0 0 of each housing are connected together by stretcher-rods D, which are passed through suitable holes made in the raised lugs (1. By turning the nuts cl on the threaded ends of rods D the arms 0' c of each housing may be moved on their pivots Fig. 4 shows in elevation one of the.

(No model.)

E toward or from each other. The rolls A and B are journaled in suitable bearings, 0 made in the outer ends of arms 0, and these arms are adjusted, as above described, so as to separate the two rolls, the desired distance dependingv 5'5 upon the size of pipe or other article to be operated on. These arms thus furnish a simple and convenient means of adjustment of the rolls. The two rolls are geared to rotate in the same direction, as follows:

A power-shaft, F, is mounted by suitable bearin gs, f, on the standards 0,-extendin g under the rolls from standard to standard. On the ends of this shaft, outside of the standards, are secured gear-Wheels F. Also, similar gearwheels G, adapted to gear with the wheels F, are mounted idle on the pivot-bolts E. On the extended end of each roll-shaft is also a gearwheel, H, adapted to gear with its adjacent wheel G. Two trains of gears, F G H, are thus provided, which take motion from a common shaft,'F, and rotate the two rolls in the same direction, one roll being driven at one end of the machine and the other roll at the other end, as shown. 7

Driving-power may be applied to shaft F in the usual or any convenient way.

The position of the pipe I? in the machine is between and parallel with the rolls, with its' axial center in aplane through the axes of the rolls. In order to support the pipe or tube in such position, I make use of a rest-bar, R, having a length equal, or nearly equal, to the rolls. The upper or working face of this bar may be flat, as shown; or it may be concave; or, if pre- 8 5 ferred, a third roll may he used instead of the bar. This bar or its equivalent roller is supported in position by two or more levers, S,

\vhich'extend outward from the bar, and have a fulcrum on or pivoted connection with posts 0 or standards S. For convenience in operating jtfhese levers, they are connected at their out'e'i ends by a rod, .9. By depressing the outer ends of these levers-the bar is raised to position directly under the pipe 1?, as in Fig. 2, and it may be locked in such position by means of a hook, T, (see Fig. 1,) or by other convenientfastening device. On releasing this hook the bar B. may be dropped, as in Fig. 3, thereby permitting discharge of the pipe on as above described.

the under side of the rolls. The bar may be raised and lowered in this way either by hand or by hydraulic, steam, or other power, as the size and weight of the apparatus may require.

It has been stated that the rolls A and B are rotated in the same direction by the trains of gearing described.

It is an important feature of this machine that the surfaces of these rolls move at different velocities, that roll-surface moving fastest which rotates toward the upper face of bar B. This may be secured by gearing one roll to rotate faster than the other; but I prefer to gear both rolls alike, as described above, and to make that roll, as roll A, which is to have faster surface velocity of greater diameter than the other, B. By this means the desired result is fully obtained, and also the arms 0 may be adjusted alike at both ends of the machine more readily than though the two trains of gearing were dissimilar.

The object of giving the roll A greater surface velocity than the rollB is to increase thereby the tendency of rollAto hold the pipe down upon the barB as against the tendency of roll B to raise it therefrom. This is especially important, as the working plane or lines of bite of the rolls are in the plane of their axes, instead of being a little below such axial plane, as heretofore, where the pipe or rod is fed endwise through the rolls.

In the present machine the article to be operated on is laid sidewise between the rolls, on their upper side, as in Fig. 1, when it is carried down and held upon the barR by the roll A until it is discharged by dropping the bar,

There is no endwise motion of the pipe into or through the rolls; but,

owing to the rotation of the rolls in the same direction, they rotate the pipe between them, and rub and scour it on the barR and between their surfaces, owing to the difference in surface velocities described. In this way the article P is straightened throughout its whole length simultaneously, and is given a round, smooth, and well-finished surface. a

I am aware that both cylindrical and conical rolls have been employed for straightening and finishing rods, tubes, &c., such rolls being arranged both parallel and inclined or crossed; but such machines, so far as I am aware, are designed to operate upon the article progressively by feeding it endwise through the rolls, such feed motion being given either by the rolls themselves or by some independent mechanism. Considerable difficulty has been experienced in the use of such machines for straightening pipes, owing to the torsion or rendin g tendency of the rolls incident to the feeding or endwise movement of the pipe in connection with its rotary movement. This difficulty is obviated in my machine by makin g the rolls of suificient length to operate upon the entire length of pipe simultaneously, and feeding the pipe sidewise to and discharging it from such rolls, as above described. I thus avoid endwise feed and perform the desired work rapidly with little strain upon the article, and with better results than when a part of the pipe only is acted on at one time by the rolls.

I I claim herein as my invention- 1. In a machine for straightening, rounding, and finishing pipes, tubes, 850., two cylindrical rolls, A and B, arranged parallel and geared to rotate in the same direction, with their surfaces moving at different velocities, such rolls being adapted to receive the article sidewise and operate simultaneously upon its entire length, as described, in combination with vertically-movable support R, adapted, when raised,to hold the pipe upward between the rolls, and when lowered to permit discharge of the pipe downward, and mechanism for giving to the support such upward and downward movements, substantially as set forth.

2. The combination of two cylindrical rolls, A B, of different diameters, arranged parallel, and adapted to receive a pipe or tube sidewise from their upper side, gear mechanism for giving such rolls rotary motion in the same direction, vertically-movable bar B, and mechanism for moving such bar toward and from the rolls and looking it in position for supporting the pipe or article between the rolls, substantially as set forth.

3. The combination of rolls A B, bar R, pivoted levers S for supporting and moving the bar, and a locking device for holding the levers and bar in position to support the article to be operated between the rolls, substantially as set forth.

4. The combination of housings 0, having standards 0 and pivoted journal-arms 0, adjusting or stretcher rods D, rolls A B, gear mechanism for rotating the rolls in the same direction, and vertically-movable under support, It, substantially as set forth.

ICC

In testimony whereof I have hereunto set I my hand.

MILDRED BLAKEY.

Witnesses:

O. L. PARKER, WM. A. HOLMA'N.

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