USRE12363E - And john a - Google Patents

Description

REISSUED JUNE 20, 1905.

H. W. & J. A. HOCK. MACHINE FOR ROLLING PIPE COUPLINGS, 8m.

APPLIOATIQN FILED APR.11 ,1904.

3 SHEETSSHEET 1- WITNESSES. 2 4Q m REISSUED JUNE 20, 1905. H. W. & J. A. HOOK.

MACHINE FOR ROLLING PIPE COUPLINGS, 45w

' APPLICATION FILED APR.'11, 1904.

3 SHEETSSHEBT 2.

FIG. 3 3

No. 12,368. REI'SSUED JUNE 20, 1905. H. W. & J. A. HOOK.

MACHINE FOR ROLLING PIPE COUPLINGS, @w,

APPLICATION FILED APR.11.1904.

7 3 SHEETSSHEE1 3.

\ FIG.6I

FIG. 7

WITNESSES. I IINVENTORS. a. dam v 1 72 ML Zrfiz, Y fi 4 1%, 'M

UNITED STATES Reissued June 20, 1905.

PATENT OFFICE.

HENRY W. HOOK, OF YOUNGSTOWN, OHIO, AND JOHN A. HOOK, OF PITTS- BURG, PENNSYLVANIA, ASSIGNORS TO NATIONAL TUBE COMPANY, OF .PI'ITSBURG, PENNSYLVANIA, A OORPORATION'OF NEW JERSEY.

MACHINE FOR ROLLING PIPE- COUPLINGS, 81.0.

SPECIFICATION formingpart of Reissued Letters Patent No. 12,363, dated June 20, 1905. Original No. 748,948, dated January 5, 1904. Application for reissue filed April 11, 1904. Serial No. 202,704.

To all 1071,0112, it ntrty concern:

Be it known that we, HENRY W. Home residing in Youngstown, State of Ohio,and JOHN A. HOCK, residing in Pittsburg, State of Pennsylvania, citizens of the United States, have invented a new and useful Improvement in Machines for Rolling Pipe-Couplings, &c., of

which the following is a specification.

Our invention relates to apparatus for manu- Io facturing pipe sockets or couplings and similar ring-shaped metal articles.

The object of our invention is to provide apparatus whereby in the welding of the socket or coupling it is provided either with countersunk recesses on its inner face at the ends or with its internal face tapered or flaring toward both ends, or with both.

A further object of our invention is to provide such articles in the welding and shaping :0 operation with internal screw-threads.

1n the manufacture of pipe sockets or couplings a plate or bar of the necessary length, width, and thickness for the desired coupling is bent into ring form and then welded and 2 5 shaped to form the coupling. The couplings are then threaded internally and counterbored at each end, either to give a proper finish or else to remove the threads for a short distance, so as to form an enlarged portion at the ends of the couplings, which will permit them to be screwed onto the pipes to such a distance as to cover the threads on the pipe where they run out; This counterboring is i usually done at only one end of the coupling at a time, thus necessitating clamping the coupling into the chuck twice in order to counterbore both ends. The time and labor consumed in doing this adds materially to the cost of the couplings.

to One object of our, invention is to provide welding and shaping apparatus for manufacturing eouplings'or sockets and similar articles which will form such articles with countersunk recesses at the ends, so as to dispense with the counterboring above referred to, thus resulting in a material saving of time and labor in finishing the couplings. Furthermore, such recesses diminish the distance through which the tap must cut in threading the coupling, so that a considerable saving of 5 time in threading also results.

Pipe sockets or couplings are preferably tapered or flared slightly toward both ends on those portions where the threads are cut, so that when the couplings are screwed onto the pipes a tight jointwill be formed. Hereto fore the couplings have been welded on a straight mandrel and the internal tapering has been done either by means of a taperreaming tool or by forcing into the end or ends of the coupling a conical plunger or plungers, so as to expand the coupling and taper the same internally. According to either method additional operations had to be performed, thus adding to the labor and cost of 5 these articles.

Another object of our invention is to provide welding and shaping apparatus whereby pipe couplings or sockets and similar articles will in the welding and shaping operation be 7 also formed withinternal tapers at both ends, so as to dispense with either the reaming or the expanding steps, which heretofore have been necessary, and resulting in a material saving in time, labor, and cost in manufacturing such articles.

To the accomplishment of the aforesaid ob-' jects our invention consists, generally stated, in welding and shaping apparatus comprising a mandrel having a working facecorrespond- 0 ing in diameter and contour to the interior of the coupling to be made and either having at the sides of such working-face portions of enlarged diameter which, during the welding and shaping of the coupling project into the pass of the welding and shaping apparatus and form the countersunk recesses in the inner face of the ends of the coupling or being tapered from its endstoward its middle portion, or both. In order to permit the re- 0 moval of the mandrel from the \vehled coupling, it is made in two transversely-scparal lc sections, and suitable means are provided for holding said sections against endwise displacement during the welding and shaping opcration.

The invention also consists in a mandrel of the kind described, together with rolls and coacting flanges or shoulders on the rolls and mandrel to prevent endwise movement of the mandrel or mandrel-sections during the weld- 7 ing and shaping'operation.

modified form of rolls.

The invention also consists in providing such a mandrel with screw-threads, so that the coupling will be formed with internal threads simultaneous with the shaping and welding operation.

In the accompanying drawings, Figure 1 is a cross-section through rolls suitable for carrying out 'our invention. Fig. 2 is a longitudinal section showing in side elevation rolls and a mandrel embodying our invention. Fig. 3 is a similar view of apparatus for making a. slightly-modified form of coupling. Fig. 4 is a similar viewof apparatus for making still another modification of coupling. Fig. 5 is a similar view showing apparatus having a Fig. 6 is a similar View showing a mandrel for forming internal screw-threads on the coupling. Fig. 7 is an end elevation of'the rolls and mandrel shown in Fig. 6, and Fig. 8 isa side view, partly in section, of a key employed with the mandrel shown in Figs. 6 and 7.

The essential element of our apparatus consists of the mandrel, which preferably is made in two transversely-separable sections 2 and 3.to facilitate its removal from the welded coupling, said sections when united forming a mandrel having a central working face I corresponding in size and contour to the diameter and internal shape of the coupling to be made. At each side of this working face the mandrel is provided with enlarged portions 5, which during the operation of the apparatus form bearing-faces for the rollfianges and project inwardly beyond said flanges to form the countersunk recesses in the ends of the coupling. One of these mandrel-sections is provided with a socket or recess 6 for receiving a teat or projection 7 on the other section in order to aline said sections. One of the sections, such as the section 2, is provided with a handle for manipulating the same, and suitable means will be provided for holding the other section, such as the section 3, in position in the'welding and shaping apparatus. Various means may be employed for this purpose, suchas the screw shown in Fig. 2. This mandrel may housed in connect-ion with any's'uitable apparatus for welding and shaping the couplings thereon, such as the hammer-dies frequently employed for this purpose; but we prefer to use rolls, and preferably a cluster of five rolls,- such as shown in Fig. 1 and as ordinarily employed for this purpose. rolls will comprise three upper rolls 10, 11,

This cluster of and 12, mounted instationary bearings insuitable housings and two lower rolls 1'3 and l H, mounted in movable hearings in the housl ings, so that the roll-cluster can be "opened up to permit the removal of the mandrel and welded coupling therefrom. This apparatus will be understood by those skilled in the art without further description.

The several welding-rolls have suitable working faces 16 and are provided at each side thereof with flanges 17 which form bearing-faces contacting with the mandrel to confine the blank. The working faces 16 of the rollsmay be of any desired shape and width and will correspond to the finished coupling cesses of various shapes and depths at both ends of the couplings. In Fig. 2 the working face a of the mandrel is practically cylindrical, and the enlarged portions 5 at each end are also practically cylindrical, so as to form a coupling having at each end practically cylindrical recesses ending in square shoulders. In Fig. 3 the enlarged portions of the mandrel are modified, so that shallow beveled countersinks are formed at the ends of the coupling, this being accomplished by the bevel-faces 18 on the mandrel. Practically the same construction is followed in Fig. 5. In Fig. 4 the enlarged portions 5 of the mandrel are provided with rounded shoulders l9, and the working face of said mandrel between said enlarged portions is tapered from both ends toward the center thereof, so as to form a coupling of the shape of the pass shown in said figure. In order to permit the removal of this mandrel from the coupling, it is necessary that it be divided transversely at the middle of the working face instead of at one side, as shown in Figs. 2, 3, and 5. In Fig. 6 is shown a mandrel having practically cylindrical enlarged portions 5 and having the working face tapering from both sides to the center and formed with screw-threads 20. This mandrel also is divided at the middle of its working face, and the two sections preferably are united, so that they must revolve togetheras, for instance, providing one thereof with athreaded recess and the other with the threaded projection 21, fitting into the same. Each of the mad rel-sections shown in Fig. 6 is provided with a polygonal projection 22 in order to receive a tool, such as shown in Fig. 8 ,-whereby such sections can be held against rotation in order that the rolls may revolve the welded socket around on said mandrel-sections and screw the latter out of said socket.

With all. forms of our sectional mandrel suitable means must be provided for preventing endwise movement of said sections dur ing the shaping and welding operation. Various means for this purpose may be employed, but preferably will consist in suitable cooperating annular shoulders on the mandrel sections and rolls. As shown in Figs. 2, 8, and t, the outer ends of the mandrel-sections are reduced in size toprovide shoulders 23, and the flanges of the rolls are provided with enlarged ends to provide shoulders 24, which cooperate with the shoulders on the mandrel and prevent endwise movement of the mandrel-sections. In Figs. 5 and 6 the enlarged portions 5 of the mandrel fit into the pass of the rolls and abut against the inner faces of the flanges 17 of the rolls to prevent endwise movement of the mandrelsections. Various other arrangements, however, may be employed for preventing the separation or endwise movement of the mandrel-sections.

In the use of our invention the mandrelsections are placed in positionbetween the rolls, as shown in the drawings. A heated blank ofthe necessary width and length is then fed to the rolls in the usual way and is coiled by the same around the mandrel and is simultaneously welded and shaped. During this operation the mandrel is free to rotate with the rolls, and the enlarged portions at each side of the working face of the mandrel form countersunk recesses in the ends of the coupling. As soon as the welding and shap ing is accomplished the rolls are opened up in the usual way, and one of the mandrel-sections, such as the section 2, is removed, together with the coupling, which will adhere thereto, the other mandrel-section 3 preferably remaining in the rolls. The welded coup- ,]ing is stripped from the mandrel-section 2, and the latter is again placed in the rolls and the operation repeated. With the form of mandrel shown in Fig. 6 after the welding and shaping has been accomplished the rolls will be opened up sufficiently to allow the cooperating shoulders on the mandrel and rolls to pass each other, and the mandrel-sections are then held against rotation, and the continued rotation of the rolls will spin the coupling around, and thus unscrew the same from the mandrel-sections.

With all forms of our apparatus the sockets or couplings are provided with countersunk recesses at each end by the mere act of welding and shaping the same, so that the usual counterboriug is dispensed with and a material saving in the cost of the coupling is effected. With the forms shown in Figs. 4 and 6 the sockets are also provided with internal tapers, so that subsequent expansion or reaming is dispensed with. Couplings such as shown in Figs. 2, 3,4, and 5 must be threaded internally in order to complete them; but the eountersinks at both ends reducethe distance through which the tap must cut, thus also making a distinct saving in the time and cost of threading.

What'we claim as our invention, and desire to secure by Letters Patent, is I 1. In a device for rolling pipe-couplings, &c., rolls and a sectional mandrel, said rolls and sectional mandrel each being provided with coacting flanges, said flanges being located in relation to each other to cause the locking together or holding in place of the sectional mandrel during the rolling action.

2. In a device for rolling pipe-couplings, &e., rolls and a sectional mandrel, each hav ing a plurality of sets of coaeting flanges, the bearing-faces of the flanges of the rolls abutting against and coacting with the bearingfaces of the flanges upon the mand rel-sections,

whereby said sections during the operation of forming a coupling may be held in proper place by the flanges of the rolls, the second set of bearing-faces on the mandrel being wider than the corresponding set .of bearingfaces on the rolls.

3. In a device for rolling pipe-couplings, &c., rolls and a sectional mandrel, each having a plurality of sets of coacting flanges, the bearing-faces of the flanges of the rolls abutting against and coacting with the bearingfaces of the flanges upon the mandrel -sections, whereby said sections during the operation of forming a coupling may be held in proper place by the flanges of the rolls, the second set of bearing-faces on the mandrel being wider than the corresponding set of bearingfaces on the rolls, said mandrel having oppositely-disposed inclines, and its sections having interengaging members.

4. Ina machine for rolling pipe-couplings, &c., rolls and a sectional mandrel, the said rolls and mandrel each having coaetingflanges forming bearing-faees oppositely disposed and serving to hold the sections of the mandrel in place during the operation of forming a coupling'and separation of the rolls permitting the separation of the sections of the mandrel for discharging the coupling, the said mandrelsections having interengagingportions.

5. In a machine for rolling pipe-couplings, &c., rolls and a sectional mandrel disposed between said rolls, said rolls and mandrel each provided with shoulders and coacting flanges eonsti tutin g bearing-faces oppositely disposed and serving to hold the sections of the mandrel in place during the operation of forming a coupling and separation of the rolls permitting the separation of the sections of the mandrel for discharging the coupling, the rolls having their central portions of smaller diameter than their bearing-faces and the mandrel having its bearing-faces wider than the coacting facesof the rolls to form countersinks in the inside ends of the couplings.

6. In a machine for forming pipe-couplings, &c., rolls and a sectional mandrel disposed be.- tween said rolls, the mandrel-sections having interengaging portions, said rolls and mandrel each provided with shoulders and coacting "flanges constituting bearing-faces oppositely clined portions.

7. In a machinefor rolling pipe-couplings, &c., a sectional mandrel, rolls upon opposite sides of said mandrel, said rolls and mandrelsections each having coacting flanges disposed in relation to each other to cause the locking together or holding in place of the sectional mandrel during the rolling action, and means on said rolls and mandrel for forming a recess in the coupling.

8. In a machine for rolling pipe-couplings, &c., a roll and a cooperating sectional mandrel provided with means for forming screwthreads in the couplings, the rolls and mandrel-sections being provided with coacting flanges disposed in relation to each other to cause the locking together or holding in place of the mandrel-sections during the operation of forming a coupling by said flanges.

9. In a machine for rolling pipecouplings, &c., a roll and a cooperating sectional mandrel provided with means for tapering the couplings from opposite ends and for forming screw-threads thereon, said roll and mandrelsections being provided with coacting flanges disposed to cause the locking together or holdingiin place of the mandrel-sections during the rolling action. 1

10. In an'apparatus for welding and shaping pipe-couplings or similar articles, the combinationof a central mandrel and a clusterof rolls surrounding the same, said rolls having flainges at each end adapted to contact with the mandrel and confine the blank,said mandrel beingcomposed of separable interengaging sections corresponding in diameter to the interior of the article to be formed and having a portion of enlarged diameter at one end pro- -flanges at each end adapted-to contact with the mandrel and confine the blank, 'said mandrel of separable interengaging sections corresponding in diameter to the interior of the article to be formed and having a portion. of

enlargeddiameter at one end projecting into the pass of the rolls, square inwardly-facing shoulders on the rolls, anda square outwardlyfacing shoulder on each section of the mandrel contacting with the shoulders on the rollsand adapted to prevent endwise movement of the mandrel during the welding and shaping operation.

12. In apparatus for welding and shaping pipe-couplings and similar articles, the combination of a mandrel and a plurality of welding and shaping devices cooperating therewith, said welding and shaping devices having working faces and flanges or collars on each side of said working faces to contact with the mandrel and confine the blank, and said mandrel being formed in two transversely-separable' sections and provided with acentral portion corresponding in diameter and shape to the interior of the coupling and of less width than the working faces of the welding and shaping devices, and having at each side of said central portion a portion of enlarged diameter, which enlarged portions project inwardly beyond the flanges of the welding and shaping devices.

13. In apparatus for Welding and shaping pipe-couplings and similar articles, the combination of a mandrel and a plurality of rolls cooperating therewith, said rolls having at the sides of their working faces flanges which contact with the mandrel and confine the blank, and said mandrel being formed in two transversely-separable sections and provided with a central portion of less width than the working faces of said rolls and corresponding in diameter and shape to the interior of the coupling and having at each sideof saidcentral portion a portion of enlarged diameter which projects into the pass of the rolls.

, 14. In apparatus forwelding and shaping pipe-couplings and similar articles, the combination of a mandrel formed in two transversely-separable sections, a cluster of rolls surrounding said mandrel, said rolls having at the sides of their working faces flanges which contact with the mandrel and confine the blank, said mandrel having a central portion correspondingjn diameter and shape to the interior of the coupling and having at both sides of said central portion portions of enlarged diameter which project into the pass of the rolls, and cooperating collars or shoulders on the rolls andmandrel-sections to prevent endwise movement of the latter.

15. In apparatus for welding and shaping pipe-couplings and similar articles, the combination of a mandrel divided in to two sections at the transverse middle of said mandrel and having a working face tapering from both ends toward said transverse middle, a cluster of rolls surrounding said mandrel, said rolls having working faces of such width as to cover the tapering portions of said mandrel and having flanges at the sides of the workconfine the blank, and cooperatingannular shoulders on said rolls and mandrel-sections to prevent endwise movement of the latter.

16. In apparatus for welding and shaping pipe-couplings or similar articles, the combination of rolls, a mandrel disposed between said rolls, said rolls having flanges at their ends constituting bearing-faces contacting with the mandrel, said mandrel having a tapered portion lying inside the roll-pass, and cooperating annular shoulders on the rolls and mandrel to prevent endwise movement of the mandrel during the rolling operation.

17. In apparatus for welding and shaping pipe-couplings and similar articles, the combination of rolls, a mandrel disposed between said rolls, said rolls having flanges at their ends constituting hearing-faces contacting ing face which contact with the mandrel and with the mandrel, said mandrel being composed of interengaging sections and having its ends of larger diameter than the central portions thereof and Wider than the corresponding bearing-faces of the rolls to form countersin ks in the ends of the coupling, and

means to prevent endwise movement of the mandrel-sections during the welding operation including cooperating annular shoulders on the rolls and one at least of said mandrelsections.

In testimony whereof We have hereunto set our hands.

HENRY W. HocK. JOHN A. HOOK.

Witnesses: F. \V. WINTER,

ROBERT C. TOTTEN.

Images