US723289A

US723289A - Expanding and upsetting tool.

Info

Publication number: US723289A
Application number: US10035402A
Authority: US
Inventors: Luther D Lovekin
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-03-28
Filing date: 1902-03-28
Publication date: 1903-03-24
Anticipated expiration: 1920-03-24

Description

PATENTBD MAR.v 24, 190s.

L. D. LOVEKIN.` EXPANDING AND UPSBTTING TOOL.

APPLICATION FILED MAR. 28, 1902.

2 SHEETS-SHEET 1.

N0 MODEL.

PATENTED MAB.. 24, 1903.

L. D. LOVEKIN.

FXPANDIITGrl AND UPSETTING TOOL.

APPLIOATION FILED MAR. 2s, 1902.

2 SHEETS-SHEET 2.

N0 MODEL.

LUTHER D. LovEKIN, oF PHILADELPHIA, PENNSYLVANIA, AssIGNoR E ONE-HALF To JOHN PETER MATHIEU, on PHILADELPHIA, PENN- svLvANrA.

IEXPANDING AND UPSETTVING TOOL.

SPECIFICATIQN forming part of Letters Patent No. 723,289, dated March 24, 1903.

Application led March 28,1902.

To all whom zit may @orticaria p Be it known that I, LUTHER DANIEL LovE- K1N, of the @ity and county of Philadelphia `the following specification and shown inthe accompanying drawings, which form a part thereof.

own axes. `its follower-shaft are moved longitudinally The object ofmy invention is to provide a simple and efficient tool capable of being easily and expeditiously handled for expandiing and upsetting tube ends or other tubular ieces within `perforated plates or apertures designed for their reception.

In carrying out my invention Iprovide a suitable mandrel adapted to be rotated in any convenient manner, the lower end of which is furnished with expandingrollers, which are preferably made tapered. Within the mandrel I'arrange a follower which car.-` ries upon its lower end a tapered roller adapted topress upon the expanding-rollers for the purpose of causing them to describe in their travel a circular path of greater or less diameter, as the work may require, and also to I reduce their resistance to rotation upon their The tapered follower-roller and I through the mandrel by handbperated means,

which may be manipulated while the expanding operation isbeing carried onby the expanding-rollers. I Combinedwith the expanding devices .above mentioned I provide the mandrel 4with upsettingrollers, arranged `about its bodyand at a distance from the ex panding-rollers. `The rollers are grooved, so as to upset and bead the edge of the tube to make a tight and finished joint-such, for example, as suitable fors'ecuring boiler-tubes I g within the head of the shell.

My invention further includes details of construction, which, together with the features above mentioned, will be better understood by reference to the drawings, in which- Figure 1 is a sectional elevation of'my im- Serial No. 100,354. (No model.)

provedexpanding and upsetting tool. Fig.

2 is an end view of the same. Fig. 3 is a sectional elevation showing `a modification ofthe antifriction devices' for the followerroller. Fig. 4 is a sectional elevation of a modified form of the lower portion of my tool. Fig. 5 is an elevation of the same. an end view of the same. Fig. 7 is a crosssection on line 7 7 of Fig. 4. Fig. 8 is a sectional elevation of the tube before being expanded and upset, and Fig. 9 is the ltube after being expanded and upset.'

Fig. 6 is 2 is a mandrel which is substantially cy .l

lindrical in shape, having at the bottom a tubular part and at the top a shank bywhich it may be held and rotated. In the lower end of the tubular part of the mandrel I arrange the expandingrollers 3, preferably three in number, which are set into sockets "5, formed with curved walls, whichV hold the rollers from falling out of the mandrel. These expanding-rollers 3 are retained upon the mandrel by an annular plate 6, held` to the bottom of the mandrel by screws 4. The surfaces of these rollers are exposed upon the Y outside of the mandrel, so as to operate upon the work to be expanded, and are also exposed upon the inside of the mandrel, so as to be operated upon by the follower-roller 10, 1ocated within the chamber 7 of the tubular part of the mandrel. This follower-'roller 10 is tapered, with the smaller end downward, and acts upon the expanding-rollers 3 to press them apart, so that they are made to describe circles of gradually-increasing diameters in the expanding operation when desired. The rollers 3 are also preferably tapered, but in the reverse direction to the roller l0.' When the inner diameter of the work to be expanded is uniform, the tapers of the rollers 3 and l0 are the same; but it would be different where the inner surface of the tubes or bushing or ter, as will be readily understood.

ring to be expanded is not of uniform diame The follower-roller l0 isloosely sleeved u upon a spindle 9 of a follower-shaft 8 and held thereon by a nut 12. When the roller `10 is retracted, it is inclosed within the chamber 7, and is thus protected when ont of'nse. I

The follower-roller is operated by the following devices: The middle portion ofthe mandrel is slotted, as at 13, and the upper portion of its body above the slot is screw-threaded at 14 and provided with a nut 17. A oontroller-ring 15, provided with suitable handles or parts for the operator to grasp, is loosely sleeved over the mandrel-body and journaled in bearings 18 011 the mandrel and 16 on the nut 17. In-this manner the controller-ring may be freely rotated for purposes to be set out later on. The mandrelbody is bored through almost to the shank and is filled with the vertically-adjustable follower-shaft 8, having at its upper end a transverse key 20, which is guided in the slots 13 of the mandrel, so as to be prevented from turning, the-ends of said key projecting beyond the mandrel-body and connecting with the controller-ring by screw-threads upon its outer ends engaging internal threads 19 on the interior face of the controller-ring. It will now be seen that by turning the controller-ring or holding it while the mandrel is rotated the follower-shaft will be caused to move longitudinally through the mandrel, and thereby impart a longitudinal movement to the follower-roller 10, located on the spindle of the said follower-shaft. Any other suitable means may be employed for imparting a longitudinal movement to the followerroller; but that shown I have found most excellently adapted to the purpose and equally effective whether themandrel is rotated or the work rotated or both rotated. While I have shown the controller-ring as provided f with handles to turn it, an ordinary handwheel may be used instead, if preferred.

As the roller 10is subjected to heavy strains in an upward direction when spreading the rollers 3 in expanding the tube or other work, I find it most advantageous to provide means to take this thrust with the least possible liability of Wear from friction. 'Io accomplish this, I provide the follower-shaft with several antifriction rings or collars 11, resting upon one another and between the end of the roller 10 and the shoulder upon the lower end of said shaft, said rings or collars encircling the spindle 9. These rings or collars take up the end thrust of the roller and permit it to revolve freely under the action of the rotating expanding-rollers While the roller 10 is carried upon the spindle 9, it need not fit the same tightly, as it is centered by the three expanding-rollers 3, and is therefore preferably made with some small provision for lateral play upon its spindle, as shown.

At a distance above the expanding-rollers 3 I arrange three or more upsetting and beading rollers 21, the same being carried upon radial axes 22, one end of which is set into the body of the mandel and the other or outer end supported by brackets 23, secured to the mandrel by screws or other convenient means. As shown, the mandrel-bodyis somewhat recessed, as at 32, into which to let the side of the upsetting-rollers 2l, so that lthe 'annular grooves of said rollers shall come in alinement with the edge of the tube being upset.

It will now be understood that if the mandrel be inserted within a tube 28, Fig. 8, and revolved while depressing the follower and follower-roller 10 the tube will be expanded within the circular hole or aperture in the plate or head 31,as shown at 29 in Fig.9. When this is done, the vfollower-roller 10 is retracted and the mandrel inserted farther into the tube until the upsetting-rollers 21 press upon the end of the tube. The action of the rollers 21 then upsets and beads the end of the tube, as shown at 30 in Fig. 9, thereby firmly securing the tube in the head 31 and making a steam-tight joint. The use of this tool is especially advantageous in securing boilertubes in the heads of boilers.

The tool may be modified in the following particulars, if so desired: In place of the antifriction rings or collars 11 between the roller 10 and the shoulder of the follower 8 I may employ antifriction-rollers or ball-bearings, as shown at 24 in Fig. 3. The rollers 3 may be held in the mandrel in the manner shown in Figs. 4, 5, and -namely, by having trunnions which lit into bearing-slots in the mandrel. In this case the rollers 3 are put into position from the inside of the mandrel, and while prevented from falling outward, because of the trunnions and bearings in the mandrel, they cannot fall inward, because of the roller 10. These figures also show a modified manner of carrying the upsetting? `and beading rollers 21.

In this case the roller-carrying brackets 23 are integral with a collar 26, fitting the mandreland held by a shoulder against longitudinal movement and also keyed to the mandrel at 27 to prevent turning thereon. The mandrel may have longitudinal slots or grooves 25 to permit the passage of the inner end of the journals 22 of the upsetting-rollers, so that these rollers may be attached to the collar 26 before the same is slipped up into place and carry with it the rollers 21. It will therefore be understood that I do not limit myself to any particular manner of attaching the rollers 2l or of supporting the rollers 3, and hence the details of construction may be varied without departing from the spirit of my invention. y l

Matters shown in this application and not claimed constitute subject-matter of other pending applications of mine, more particularly Serial No. 100,351, of 1902, Serial No. 100,353, of 1902, and Serial No. 100,355, of 1902.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a tool for expanding and upsetting pipe, the combination of a mandrel having a tubular end, a series of expanding-rollers carried" by the tubular end of the mandrel and movable to and from each other, a cen- IOO IIO

Vagainst which the expanding-rollers rest and upon which they revolve When doing their work of expandingthe tube, a central support for the central roller for supporting it within the mandrel but out of contact with its interior Walls, and one or more grooved upsetting-rollers jonrnaled upon horizontal i axes radiating from the mandrel at a considerable distance from its end so as to be out of transverse alinement with the expandingrollers butmaintaining relatively fixed relation to said rollers.

2. In a tool for expanding and upsetting pipe, the combination of a mandrel having a tubular end and a shoulder at a distance from the endfa series of expanding-rollers carried by the tubular end of the mandrel and movable to and from each other, a central roller Within the tubular mandrel and against which the expanding-rollers rest and upon which they revolve when doing their Work-of expanding the tube, a central support for the `central roller for supporting it within the mandrel but out of eontactwith its interior walls, one or more grooved upsetting-rollers journaled upon horizontal axes radiating `from the mandrel at considerable distance from its end so as to be out of transverse alinement with the expanding-rollers, anda ring fitting about the mandrel adjacent to the shoulder and provided with brackets supporting the outer ends of said upsetting-rollers.

3. In a tool for expanding tubes, the oombination, of a mandreladapted to be held when usingthe tool, expanding-rollers carried by the mandrel and adapted to project beyond the outer surface thereof, a longitudinally-adj ustablefollower carried by the mandrel having an annular shoulder, a tapered roller journaled upon the follower and moved thereby and adapted to receive the thrust of the expanding-rollers when in the act of expanding the tube, antifriction-bearings between the end of the follower-roller and the shoulder of the follower, means to move the follower longitudinally through the mandrel without rotating it, grooved upsetting-rollers rotating in vertical planes and upon axes radially arranged to the mandrel, and supporting means for the upsetting-rollers extending upward or away from the expandingrollers and secured to the mandrel.

`t. In an expanding-tool, the combination of the mandrel havinga tubular end portion provided with sockets opening outward at the rim, tapered expanding-rollers 3 carried in said sockets and of larger diameter than the outer openings of the sockets, an annular ring 6 secured to the end ofthe mandrel to close the bottom of the socketsV and. to hold the rollers in place, a tapered follower-roller 10 arranged within the mandrel and adapted to spread the expanding-rollers 3, means for moving the follower -roller longitudinally without rotating it, grooved upsetting-rollers 2l rotating in vertical planes, and downwardly-extending brackets supporting the outer ends of said rollers and secured to the mandrel above them.

In testimony of which invention I have hereunto set my hand.

L. D. LOVEKIN;

Witnesses:

' R. M. HUNTER,

GEORGE H. EIMERT.