US396988A - Pipe theeading machine - Google Patents

Description

(No Model.) 4 sheets-sheet 11.

W. J. DALY.

PIPE THREADING MACHINE.

Patented Jan. 29, 1889.A

(No Model.) 44 Sheets-Sheet 2..

W. vJ. DALY.

PIPE THRBADING MACHINE.

Patented Ja.11.29, 1889.

mrmllllln' i I" HHIEN luy 4 Sheets-'Sheet 3.1

(No Model.)

W. J DALY.

PIPE THRPADING MACHINE.

No. 396,988. Patented Jari. 29, 1889.

Wwf/Q? (No Model.)

4 Sheets-Sheet 4. W. J. DALY.

'PIPE THREADING MACHINE.

lateuted Jan. 29, "1889.

i. PETERS "wiwi-MMU. Walhivvgwn. D. C.

rares Per rrrcic.

'ILLIAM J. DAILY', OF MCKEESPORT, ASSIGNOR OF ONE-HALF TO W. S. FOSTER, OF PITTSBIIRG, PENNSYLVANIA.

PIPE-THREADING MACHINE.

SPECIFICATION forming part of Letters Patent No. 396,988, dated January 29, 1889.

Application filed June 14:, 1888. Serial No. 277,065. (No model.)

Be it known that I, \`\"ILLIA1\1 J. DALY, a resident of Mclx'ccsport, in the county of Allegheny and State ofl Pennsylvania, have invented a new and useful VImprovement in Pipe-'Iln'eading Machines; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to pipe-threading machines, and more especially to an apparatus for securing and gripping the pipe while the cutting operation is in progress. The machines of this class have generally been arranged with the threading devices stationary and the pipe-holding devices rotary; but in such machines the means for centering the pipe to be threaded have been objectionable, in that they required more time and labor than desirable for rapid work and were lia` ble to get out of adjustment and throw the work out of center.

The principal object of my invention, therefore, is to provide an apparatus by which the pipe is accurately centered with reference to the screw-cuttin g dies and securely held by gripping jaws while said pipe is revolved and fed to the screw-cutting dies, and the pipe is quickly released after the cutting of the same.

To these ends my invention consists in certain improvements and conibinations of parts, all of which will be more fully hereinafter set forth.

To enable others skilled in the art to make and use my invention, I will describe the same more fully, referring to the accompanying drawings, in which-M Figure l is a longitudinal section of the gripping devices of my improved pipe-threading apparatus. Fig. 2 is a front View of the face-plate, showing the gripping-jaws. Fig.

l3 is a vertical cross-section on the line a' as,

view of the gripping apparatus, showingI a modiiied arrangement of the sliding cone. Fig. 7 is a cross-section of one of the grippers and its adjusting mechanism on the line z/ y, Fig. l. Fig. S is a perspective view of the gripping-jaw employed therein. Fig. 9 is a longitudinal section of another means of adjusting the gripping-j aws. Fig. lO is a view of another form of gripping-jaw, and Fig. ll is a detail viewv illustrating the cutting-die and mechanism forsupporting the pipe.

Like letters of reference indicate like parts in each.

The bed of the machine supports the frame B of the gripping apparatus (shown in Fig. l)v

and forms the bed or foundation, YV, on which the threading-dies (shown in Fig. 5) slide, these parts being shown in separate figures to better illustrate them. I will iirst describe the gripping apparatus supported in the frame B.

The hollow spindle A is mounted and supported on the frame I3, and has secured to one end a face-plate, C, with the inwardly-extending flange D, which forms the journal for the spindle in the forward standard, B', of the frame B, while the other end is mounted in the rear standard, B2, and has secured thereto the gear-wheel E, by means of which said spindle is rotated. Meshing with said gearwheel E is. the pinion F, attached to the shaft G, which is parallel with the spindle A and revolves in suitable bearings in the standards B B2, said shaft G carrying the gear-wheel II, which meshes with the gez'Lr-wheel I, j ournaled loosely on the hollow spindle A, said gearwheel I being cast wit-h or secured to the gearwheel J, and with it turning loosely on said hollow spindle.

The gear-wheel J meshes with the pinion K on the shaft L, which is mounted in the machine-frame and at one side of and parallel with the hollow spindle A. The shaft L carries the driving-cone pulley N, to which the belts are attached and by which the speed of rotation of said shaft L is regulated.

Fitting around the hollow spindle A is the cone-shaped sleeve O, which is secured to the hollow spindle A and held in position by the feather a on the said spindle, which lits in a groove in said cone-shaped sleeve, so that the sleeve rotates with the hollow spindle A and is adapted to slide forward and backward thereon.

Fitting loosely around the cone-shaped IOO sleeve O near its base and within an annular groove, o, in said sleeve is the ring or annulus o. A forked lever, P, secured to the rockshaft Q, which is mounted in suitable supports, B3, attached to the standards B '32, cngages, by its arms p, the annulus o on each side thereof, being secured or pivoted thereto by the pins p, so that by the movement of the lever F the cone-shaped sleeve O is moved forward or backward, as desired, on the hollow spindle A.

On the shaft Q are secured the crank-levers R, the upright arms o' of said levers carrying the weights fr at one end thereof, while the other arms, r2, are connected by chains fr or other suitable means to cranks or disks on the crank-shaft R2, which is mounted in suitable supports attached to the base l* of the frame B. On the said shaft R2 is the clutch R3, secured to the shaft bya feather, t, tting in a groove in said clutch, said clutch being adapted to be moved forward and backward on said shaft and to revolve with it, while a beveled pinion, R5, journaled loosely on thc shaft R2, has formed on it the corresponding clutch-face, RG, said pinion also meshing' with a beveled pinion, Rl, on the vertical shaft RS, which shaft is rotated by means of abeveled pinion, R, secured to its upper end, and said pinion Rf meshing' in turn with the pinion R10, secured to the horizontal. shaft Il. Any suitable means of throwing the clutch R3 into connection with the clutch-face R may be employed.

The shaft G has secured thereto the pinion g, meshing' with the gear-'face g, surroun din g the annular iiange I), extending back from the face-plate C, this gear-face and pinion bein g employed to insure the smooth rotation of the hollow spindle A, the power being applied at the rear end by the gearing F E and at the forward end by the gearing g g', so that the hollow spindle is relieved from substantially all strain in running.

On the face-plate C are the gripping-jaws s, arranged, preferably, at regular intervals from each other, said gripping-jaws being' adjustably secured to blocks s', which are arranged to slide in suitable guides, s2, arranged radially around the plate C; and in order to operate said guide-blocks s and the grip pingjaws connected thereto they are connected to socket-blocks s3, extending through the radial slots c in the face-plate C and secured to the slidingl blocks s. In said socketblocks s3 is the socket s, into which the end of the lever S ts, said lever being pivoted to the hollow spindle A in the bearing si and extendingto the 'rear of said spindle, so that its rear end, s, 'is in contact with the cone-faced sleeve O. Each gri pperis mounted separately in the manner above described and operated by its separate lever S, and the jaws are ad- 1 justed toward and from the pipeby means of the ad j listing-screws m, the ends of each grippingjaw s, which enters the block s', being formed hollow and internally threaded, while its outer surface is angular, andthe jaw slides in a like angular seat in the sliding' blocks s. The adjusting-screw m engages with the threaded interior of the jaw, and as the adjusting-screw is held from longitudinal motion within the sliding' block (by means of a collar, on, on thc head of the screw) it is evident that the gripping-jaw can be fed out or in by turning' the screw. The jaws may, if desired, have solid shanks lit-ting in the blocks S and be adjusted by a screw pressing against the base of the shank and be held by a setscrew, as shown in Fig. fl. The jaws are preferably made with two bi ting edges, c, extending longitudinally oit' the pipe, so tha-tinstead ot' gripping the pipe by being forced laterally or at an angle against it they are so adjusted as to be 'forced longitiulin'ally, so that the cutting-edges will be parallel with the surface of the pipe and so can hold it from turning withoutcutting deeply into it.

I have shown two forms of biting-edges, such as illustrated in Figs. S and lO, in one of which, Fig. 8, the inner faces of the bitingedges are inclined, as at c', and in the other, Fig. 10, the inner faces are parallel, as at e2, the biting-edges thus corresponding to two coldchisels. I prefer the latter form, as it takes a more direct bite or hold on the pipe.

In order to force the rear ends, s, of the levers S against the cone-shaped sleeve O, I provide a spring-band, S, of sufcient length to encircle the levers and press against the saine. I prefer to make this spring loose and hold it in place by lugs sl' on said levers, so that the spring will press evenly on all of them, and to maintain this pressure even when the levers are expanded I extend the spring' twice around the levers, as shown.

Instead of arranging the sliding conc O so as to spread the levers S and force the jaws s into the pipe by a 'forward movement thereof, its position may be reversed and the power applied by drawing the lever in the opposite direction, the levers S being correspondingly lengthened, as shown in. Fig. G.

The pipe cutting and threading' apparatus which forms part of my invention, and which is shown in Figs. 5 and ll, is provided with the bed lV, forming an extension of the bed on which the frame B rests, and on this bed slides the head or stock T, which is provided' with the opening T in line with the hollow spindle A, and through which the pipe to be threaded passes. At the entering' end of the horizontal sliding' threading head or stock T2 are the threading-dies t, mounted in an ordinary adjusting apparatus, by which they may be advanced accordin to the depth of thread desired and withdrawn to permit the passage ot' the pipe to the cutting-dies. die c is secured to a slide, c2, and is advanced and retracted by a hand-wheel, c3. Sliding in the head T, opposite the cutting-die c, is the holding-die u, and above the opening T is the holding-die u', these dies being provided with nuts u2, sliding' in seats in the head, through IOO IIO

The euttingsectes which nuts pass the :feed-screws 11,3, which are connected to the hand-wheel n4.

Supported on the head T is the oil-tank r, and leading from said tank is the supply-pipe t', which furnishes the oil necessary in the threading operation and allows it to be discharged 'freely upon the pipe near the cutters. A pump, t2, operated by a crank-arm in the usual way, supplies the oil for the tank rand is attached thereto, while a flexible tube, "uit, supplied with a suitable stop-cock, leads .t rom the tank t' to the Areceptacle V, situated beneath thehead T, and into which allthe waste oil used in the threading operation drips and is collected. This receptacle W has the inclined sui-tace W2 therein, by means of which all the drippings liow to the aperture W3, to which is attached the flexible tube r3, said aperture having as a coveriu the wire screen lV", which prevents any particles ot iron tilings or other solid substances t'rom entering therein.

In practicing my invention the pipe to be threaded inserted in the hollow spindle A, through therear end thereof, and the end to be threaded extends out beyond the surfaceplate C, accordii'ig to the distance between the revolvinggrippingapparatus and the threading-die, the pipe bei ngpassed through until it also passes through the opening T of the sliding cutter-head T2.

lVhen the pipe has been properly adjusted, the hand ot` the operator is applied to the lever r, and said lever is .tor-eed forward, thereby torcin the forked lever I andthe cone-shaped sleeve O toward the :tace plate (l. By this forward movement ot the cone-shaped sleeve O the rear ends, s, ot the levers S travel up the tace ot' the said sleeve and are vforced or spread farther apart, while the other ends of said levers are drawn. closer together, and through them the gripping-jaws s (suitably connected thereto in the manner hereinbefore described) are driven into the pipe passed through the hollow spindle A, so that the pipe thus securely gripped on all sides by said gripping-jaws, and at the same time is accurately centered. The end of the pipe to be threaded thus brought in position for cutting ott' and turning` up the end prior t0 threading,l the head or back slide T being moved along its track or way on the bed IV until brought to the proper position, and the holding-dies u u are advanced to support the pipe against the pressure et the cutter c. Power is n ow applied to rotate the hollow spindle A, (said spindle being rota-ted from the power-shaft L through the gearing K .I I H, shaft G, and gearing F E and g g,) and as the tube is thus rotated within the hollow spindle the cutting-die c ents oit the end ot' the pipe, which is sustained against the pressure thereof by the holding-dies u a', the die u holding the pipe against upward movementand preventing its wabbling, as often happens in the ordinary dies. As soon as the eutting operation is completed, the cutter c and dies a It are withdrawn, the head drawn back beyond the pipe, and the threading-dies t closed. The head is then forced against the pipe until the taps ot' the threading-dies obtain a hold thereomwhen the pipe as it is threaded draws the head forward. until the proper thread `is formed, andthe threadingdies are then opened, the rotation ot' the hollow spindle stopped, and the operator, by forcing back the lever/r, draws liack the coneshaped sleeve O, and through the levers travcling thereon releases the pipe trom the gripping-jaws s, which are withdrawn by the spring s', so that the pipe may then be removed. Y

lVhere a pipe of large dimensions is to be threaded and more power than can well be appliedv by hand to t'orcc the lever fr' forward is required, a treadle is suitablyarranged and connected with the clutch on the crank-shaft R2, so that when the vtoot is applied to said treadle` the crank-shaft will be rotated, and by theV strain onf the chains the lever fr will be forcedtorward 'with great power, and consequently the,"gripping-jaws s caused to bite with corresponding torce and hold the pipe iirmly.

By the employment ot the above-described apparatus I am enabled to produce a pipe with threads of regular t'orln and pitch, on account ot' the accurate adjustment ot the pipe to the screw-cutting device, and as all the levers and gripping-jaws connected therewith are operated by one movement and at the same time the pipe is thus very acculrately centered. For pipes that vary in diameter within two or three inches no change or adjustment is .necessary in the several parts of the apparatus, and thus much time and labor are saved. Where small pipes are to be threaded, only three or tour of the grippers need be employed, the remaining grippers being disengaged `from their levers or otherwise relieved.

lVha-t I claim as my invention, and desire to secure b v Letters Patent, irsl. In pilie-threading apparatus, the combination oi' the sliding block s, the sliding gripping-jaw s, having a shank threaded interiorly and fitting within said sliding block, and the adj Listing-screw m, engaging with said gripping-jaw and acting to advance or retract the same, substantially as and for the purposes set forth.

2. In pipe-threading apparatus, the hollow spindle A, having the tace-plate C, provided with radial guides, in combination with the sliding blocks s, carrying the gripping-jaws and connected to the socket-blocks s, and the operating-levers S, substantially as and for the purposes set toi-th.

3. In pipe-threading apparatus, the hollow revolving spindle for holding the pipe to be threaded, mounted in the machine-frame B, and having the flange D, forming the journal for the spindle at one end of said frame, in combination with the longitudinal shaft G,

IOO

IIO

gear-wheelsE F, gear-wheel g, and gear-face g on said iiange I), substantially as and for the purposes set forth. A

l. In pipe-threading apparatus, the Combination, with the hollow revolving spindle mounted in the machine-frame, of the sliding cone-shaped sleeve O, sliding thereon and eon neeted thereto by a feather, and levers S, pivoted to the spindle and operating the sliding gripping-jaws s, and the rock-shaft Q, carrying the arm P, Connecting with said sliding cone-shaped sleeve, and having the arm eonneoted by Chain with the erank-shaftRQ, substantially as and for the purposes set forth.

5. In pipe-threading apparatus, the combination of the hollow revolving spindle A, the Cone-shaped sleeve O, slidingl thereon, the levers S, connected to the sliding gripping-jaws s, and the spring s', extending around and bearing upon the several levers and held in place by lugs or projections thereon, substantially as and for the purposes set forth.

6. In pipe-threading apparatus, the combination of the hollow revolving spindle having the cone-shaped sleeve O sliding1 thereon, and Connections between said cone and the sliding gripping-jaws s, in combination with the rooloshaft Q, having arm P, en gaging with the @one and arm or lever, and the erankvshaft R2, having its cranks connected to said lever, and mechanism for rotating said crank-shaft connected thereto by a eluteh, substantially as and for the purposes set forth.

7. In pipe-threading apparatus, the combination of a hollow revolving spindle adapted to engage with, center, and rotate the pipe, and sliding threading-die in line therewith and having a cutting-die, a holding-die opposite the same, and a holding-die above said Cutting-die, substantially as and for the purposes set forth.

8. In a pipe-threading apparatus, sliding gripping-jaws, each having two biting-edges extending longitudinally of the pipe to be threaded, the inner faces of which bitingedges are substantially parallel, substantially as and for the purposes set forth.

In testimony whereof I, the said WILLIAM J. DALY, have hereunto set my hand.

WILLIAM J. DALY. Xllitnesses:

RoBT. D. TOTTEN, J. N. COOKE.

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