US2433152A

US2433152A - Rotary swaging machine

Info

Publication number: US2433152A
Application number: US483418A
Authority: US
Inventors: Patnaude Frank
Original assignee: CREAD ENGINEERING AND RES COMP
Current assignee: CREAD ENGINEERING AND RES COMP; CREAD ENGINEERING AND RESEARCH Co
Priority date: 1943-04-17
Filing date: 1943-04-17
Publication date: 1947-12-23
Anticipated expiration: 1964-12-23

Description

Dec. 23, 1947. F, PATNAUDE .2,433,152

` ROTARY swAGING MACHINE Filed April 17,'1943 5 Sheets-Sheet l Dec. 23, 1947. F. PATNAUDE 2,433,152

ROTARY SWAGINGMACHINE A Filed April 17, 1945 l 3 Sheets-Sheet 2 Dec. 23, 1947.

Filed April 17, 1943 F. PATNAUDE ROTARY SWAGING MACHINE 3 Sheets-Sheet 3 '3f/ffl' gif I 32 {57 Patented Dec. 23, 1947 'ff l 2,433,152

ROTARY sWAGING MACHINE Frank Patnaude, Warwick, R. I., assigner, by mesne assignments, to Cread Engineering and Research Company, Cranston, R. I., a corpo-Y ration of Rhode` Island Application April 17, 1943, Serial No. 483,418-

The present invention relates to rotary swaging machines of the type comprising cooperating dies which are continuously rotated around the work and reciprocated radially during their rotation to progressively swage the periphery of the work.

One of the objects of the present invention is to provide a machine of the type indicated for lapplying annular ttings of various shapes to articles of manufacture.

Another object is to Provide a machine of the type indicated in which the dies are reciprocated continuously through a constant stroke and progressively advanced radially inwardly toward each other during a swaging operation.

Another object is to provide a machine of the type indicated in which the dies may be opened radially to receive the work therebetween and progressively closed together during a swaging operation.

Another object is to provide a machine of the type indicated in which the reciprocating dies are positively advanced with a predetermined controlled rate of moti-on to cause the work to be compressed gradually. v

Another object is to provide a machine ofthe type indicated with manually-controlled hydraulically-operated means for progressively closing the dies.

Further objects of the invention are set forth in the following specification which describes a preferred construction of machine embodying the invention and several kinds of ttings adapted to be swaged by the machine, by way of example, as illustrated by the accompanying drawings.

In the drawings:

Fig. 1 is a longitudinal sectional View of a rotary swaging head incorporating the novel featuresl of the present invention and showing the dies as in their open position;

Fig. 2 is a transverse sectional View on line 2 2 of Fig. 1 showing the means by which the dies are rotated and reciprocated simultaneously;

Fig. 3 is a detailed view of the forward end of the swaging head similar to that illustrated in Fig. 1 and showing the operating wedges as advanced to close the dies;

Fig. 4 is a sectional plan View on line il-4 of Fig. 1 showing the operating means for the wedges and the interlocking tongue-and-groove connection of the Wedges therewith;

Fig. 5 is a detailed sectional view of the workholding guide showing the separable parts of the guide as in spaced relationship to permit the work to be entered therebetween;

Fig. 6 is a diagrammatic view of the hydraulic 3 Claims. (Cl. '7S-20) 2 circuit and motor for operating the wedges to open or close the dies; l

Fig. 7 is a longitudinal sectional view through the swaging head showing a modified forrn of construction' 'of the dies for applying a cylindrical bearing sleeve to an article; and

Fig. 8 is a similar view showing the dies as closed against the work at the completion of a swaging operation;

With` the usual types of rotary swaging machlnes the dies are Simultaneously rotated and reciprocated through a constant stroke and are yprovided with cooperating tapered recesses forming an axial opening therebetween. The work to be swaged is moved axially through the opening between the dies and the latter operate to progressively swage and reduce the work as it advances between the tapered recesses. The swaging operation in such a machine forms the work with a cylindrical periphery. i

In accordance with the present invention the dies are reciprocated through a constant stroke during their rotation about the Work, being rst opened to receive the Work and then progressively advanced radially inwardly toward each otherl to compress the work. The dies are positively actuated with a. predetermined controlled rate Yof movement so that the work positionedbetween the dies is gradually compressed radially without any axial movement thereof. The swaging machine of the present `invention is particularly adapted for applying annular ttings to Various types of articles, for example, spherical orcylindrical iittings to cables,'rods, shafts and the like.

, In the embodiment of the invention illustrated in Figs. 1 to 6 of the present drawings the machine is adapted to` apply spherical ttings or abutments W to the end of iiexible motion-transmitting cables C such as used in the controls oiairplanes, motor-vehicles and the like.

Referring to Figs. 1 to 6 of the drawings, the rotary swaging machine of the present invention comprises spaced bearing housings 2 and 3 supported on a pedestal 4,only the upper portion of which is shown in-Figfl. The spaced bearing housings 2 and 3 have alined horizontal bores 5 and `6 through which a tubular drive-shaft or spindle 'I extends. The spindle 1 is journaled` in ball-bearings 8 and 9 mounted inthe housing 2 and ball-bearings l0 and Il in the housingV 3. Roller thrust-bearings l2 and I3 also are provided in the housing 2 and 3 to restrain. the spindle against axial movement. The thrustbearing I3 is mounted between anl annular shoulder` I4 in the housing 3 and an annular shoulder l5 on a sleeve I6 shrunk onto, or otherwise secured to the enlarged end of the spindle 1. The thrust-bearing I 2 is mounted between an annular shoulder I9 in the housing 2 and a collar 20 on the spindle 1. The thrust-bearings I2 and I3 are clamped between their seats I4, I5 and I9, 20 by a, nut.2'l 'screwed onto the threaded end 22 of the spindle 1' and set up tightly against the side of the collar 28, the nut being held against release by a check-nut 23 and a lock-Washer 24 The drive-shaft or spindle 1 has, an lenlarged end-portion 26 with a diametrical slot 21 extending across its forward face, see Figs. 1, 2. and 4'. Slidably mounted in suitable bearing guides 4at the sides f the slot 21 is a pair of; opposed

ham mers

28 and 29 having their radially outward faces 38 and 3l of arcuate contour. Between'thehame mers 28 and 29 is a pair of dies 32 and 33, later to be described in detail. Surrounding the -err` larged end-portion 26 of the spindle 1 is an annular cage 34 supporting rollers 35 held in cir cumferentially-spaced pockets therein. Abutting 'theends of the rollers 35 are retaining

'rings

36 and 31 and surrcunding the cage34 isa'h'ead-rng 38. Adjacent the retaining rings 36 'and 31 are thrust-

rings

39 and 40. The hammers. 28l and v29 are-guided at their forward 'sides'A by a ring 4! yand at the rear byv a plate 42,'seeFig. 4. The ring 4I is mounted on the forwardfface of the-endpo'rtion 26 of th-spindle 'I and overlies the forward sides of the hammers 28 and 29 :and the plate 42 is mounted in grooves `43 in the end-'portion 26-at thesdes f the S1017' 21. At the front of.

the swaging/ head is a. door 45 having anannular concaved guidingv surface 46 with a tapped'hole at its center in whicha bushing 4:1 is screwed.

Mounted fastona conicalfseat 4Bfon thespindle 1 between the bearing housings 2 and 3 is a iiywheel 49. The yw'heel 49 is connected to the spindle 1 for rotation therewith by a key Ell-and held against axial movement on its conicalfseat 48 by means of a nut 5I and check-nut V52 with a lock-washer therebetween. The flywheel 19 may be' driven from a motor, not herein shown. by belts 53. AsV thus far described the machine is sub- Stantally identical with previously-used constructions.

'In the embodiment of the invention illustrated in Figs. l to`6 of the present drawings each die '32 and33 has a substantially semi-spherical recess 54 `in its working face 'and a tapered guiding recess 55 in its forward' face leading into the semi'- spherical recess, see Fig. 3.. At the rear of the recess 4 the die 33 is provided witha pair of tongues 56 which cooperate with correspondinglyshaped grooves'51 in thedie32. As shown in Fig. 1, the dies 32a`nd33 also have a second set of cooperatingspherical recesses 5.4 andguidingrecesses 55 adjacent vthe rearward tongue 56 and groove 51. DueA tov this form-of construction the diesfmay be reversed in position when one set of recesses becomes Worn; or, if desired, the two-'sets ofrecesses may be made of' differentdimensions or shapes to adapt them to swage diierent types of work As illustrated in Figs. 1 to 5'- the dies 32 and 33 are particularly designed for swaging spherical fittings W onto the end of flexible cables C and the tongue 56 is adapted to be engaged by the end-of the cable to'position the fitting in aliner'neit `with the cooperating recesses 55 in the dies Whichconn'e and Compress the material of the ntting as it is swaged in place.

Preferably, a work-holding guide Suis provided for' holding the cable C centrally of the dies 32 and 33'while thetting W is' being swaged in place 4 thereon. 'I'he workholder 68 is of tubular form to adapt it to fit closely within the bore of the bushing 41 in the door 45, its end 6I being tapered to conform to the cooperating tapered recesses 55 at the forward end of the dies 32 and 33 closely adjacent the semi-spherical recesses 54. Intermediate its ends the work-holding guide 69 is provided with a radial flange 62 for engagement with the face 63 of the bushing 41 in the door 45 to limit its inward movement between the dies 32 land .33. Thework-holding guide 68 is provided with an axial bore 64 of the appropriate size to adapt 'it to receive and hold the cable C. A1-

tho'ugh the work-holding guide 60 may be made 'in' onerpieceto adapt the cable C to be inserted through its axial bore 64, preferably, it is made in separable halves as shown in Fig. 5 to adapt it to be opened to receive the cable. In some instances, it may be desirable to hingedly connect the separable halves of the work-holding guide 60 'at one side thereof .to facilitate opening and closing the same,

In accordance with the vpresent invention the ldies 32 and 33 are arranged to be advanced inwardlyV toward each other during their reciprocation toswage the work W by progressively compressing and reducing it radially. For this purpose longitudinally-

movable wedges

68 and 69 are provided between the

hammers

28 and 29 andthe dies 32 and 33. The

wedges

68 and 69 are of a width to adapt them to slide in the slot 21 in the enlarged end-portion 26 of the spindle 1 at the rear of the plate 42, see Figs. 1 and 4. Each wedge has a horizontal face 10 for cooperation with the radiallyfoutward face or the die 32 or 33 and an inclined face 1I for cooperation with a correspondingly-inclined inward face 12 of the hammer -28= or 29. The

wedges

68 and 69 extend through slots 13 in the plate 42 with their rearward ends positioned in a transverse slot 14 in the forward face of a horizontal operating member 15 extending axially of the spindle 1, As shown in Fig. 4, the operating member 15 has inwardly-directed tongues 16 at opposite sides of the slot 14 for interlocking engagement with correspondinglylshaped grooves 11 at the sides of the wedges. The tongue-and-groove connection of the

wedges

68 and 69 with the member 15 serves to cause the wedges to be moved longitudinally with the member while permitting radial sliding movement of the wedges Vin the slot 14.

The actuating member 15 has a rearwardly-extending tubular flange 18 which is received in theforward end of a sleeve 19, to which it may be fixedly connected by brazing, welding or otherwise. The sleeve 19 extends through the axial bore of the tubular spindle 1 with its rearward end projecting beyond the rearward end thereof. The rearwardly-projecting end of the sleeve 19 mounts a thrust-ring 82 having laterally-projecting pintles 83 at its opposite sides. The thrustring 82 is relatively free rotatively of the sleeve 19 and held axially thereof between anti-friction thrust-bearings B4 and 85. The thrust bearings 84 and 85 are held in adjusted position longitudinally of the sleeve 19 by means of split nuts 86 and 81 at opposite sides of the bearings. The nuts 86 and. 81 may be adjusted axially of the sleeve 1S` by turning them on screw-threads 8| on the sleeve to regulate the position of the thrust-ring 82 longitudinally thereof and then fixed in any 'adusted position by tightening their binding screws 88.

The sleeve 19, actuating member 15, and

wedges

68 and 69 are adapted to be moved longitudinally of the spindle l by hydraulicallyoperated means comprising a lever 90 pivotally mounted intermediate its ends on a bracket 9| attached to a depending portion of the bearinghousing 2. The upper end of the lever 90 is forked to straddle the thrust-ring 82V and is provided with slots 92 at its ends in which the pintles 83 on the ring engage. Embracing the lever 90 between its :pivot and forked end is a bifurcated bracket 93 attached to the depending portion of the bearing-housing 2 and having abutments 94 and 95 engageable by the lever to limit its rocking movement in opposite directions. The abutment 95 i's of U-shape with its sides xedly connected to the sides of the bracket 93 by screws 96; while the abutment 94 is in the form of a set-screw screwed through the end of the bracket and adapted to be locked in adjusted position by a check-nut 91. The lower end of the lever 90 is connected by a pin |00 to the end of the piston-rod 98 of a hydraulic motor 99 shown in sectional diagrammatic view in Fig. 6. The hydraulic motor 99 comprises a cylinder |I enclosing a reciprocatory piston |02 connected to the end of the piston-rod 9B. The cylinder 0| of the hydraulic motor 99 has a projection at its end, see Fig. 1, positioned between the sides of a clevis |04 attached to a portion of the housing 2 which forms a casing for the ilywheel 49 and connected to the clevis by a pin |03 to permit a slight rocking movement of the cylinder. The cylinder |0| has ports and |06 arranged at opposite sides of the piston |02 for supplying motive uid thereto and exhausting it therefrom.

The hydraulic circuit for controlling the fiovv of motive uid to the cylinder V|0| of the hydraulic motor 99Vis illustrated diagrammatically in Fig. 6. The motive fluid is supplied from a tank |03 and continuously circulated by a pump |09 driven from a suitable electric motor H0. The motive fluid is delivered from the pump |09 through a conduit ||I to the inlet port H2 in the casing of a valve I I3. Connected to the conduit HI is a relief valve H4 which is operative at a predetermined pressure to exhaust the motive fluid through a conduit H5 to the tank |08. Mounted to rotate in the casing -oi the valve H3 is a valve-plug H6 which has recesses in the opposite sides of its periphery to provide passageways H1 and H0. The valve-plug H6 has a manually-operable treadle H9 connected at its end and the treadle normally is adapted to be rocked counterclockwise to the position shown by full lines in Fig. 6 by a spring |20. When the valve-plug H6 is in the position shown in Fig. 6 the passageway I1 connects the inlet port H2 with a port |2| in the casing of the valve H3. A conduit |22 connects the port |2| in the casing of the valve H3 with the port |05 in the cylinder |0| of the hydraulic motor 99 to deliver motive fluid to the lefthand side of the piston |02. A conduit |23 connects the port |06 in the cylinder |0| at the right-hand side of the piston |92 with a port |24 in the casing of the valve H3. The passageway H8 in the valve-plug H6 leads from the port |24 to an exhaust port |25 in the casing of the valve H3 and the motive iluid'may be exhausted to the tank |08 through a conduit |26 leading back to the conduit H5 to debouch into the tank |08. When the treadle H9 is depressed to the position indicated by dash-lines in Fig. 6 the passageway Hl will connect the inlet port H2 to the port |24 in the casing of the valve ||3 to direct motive uid delivered 'from the pump |09 to the right-hand side of the piston |02 in the cylinder |0| of the hydraulic motor 99. Simultaneously, the passageway H8 will connect the port |2| to the exhaust port |25 in the casing of the valve I3 to exhaust motive iluid from the left-hand side of the piston |92 in the cylinder housing Il. A preferred construction of machine incorporating the novel features of the present `invention having been described in detail, the mode of operation of the complete apparatus is explained as follows.

Let it be assumed for the purpose of description that the flywheel 49 and spindle 'l are being rotated by the belts 53 and the dies 32 and 33 are being maintained in their open position as shown in Figs. 1 and 2 under the action of centrifugal force. As the spindle l rotates at a relatively high rate of speed the

hammers

28 and 29 will be moved radially outward in the spaces between successive rollers 35 due to centrifugal force acting on the hammers and then will be forced radially inward by the engagement of their arcuate faces 30 and 3| with the rollers. The

hammers

28 and 29 thus are reciprocated rapidly with a predetermined constant stroke as determined by the spacing of the rollers and the radius of the arcuate faces 30 and 3| of the hammers. The reciprocatory motion of the hammers is transmitted through the

wedges

68 and 69 to the dies 32 and 33, it being noted that Fig. 1 shows the wedges asin their rearward or retracted position with the dies open to receive the work.

The cable C and tting W, shown in the form of a bead, may be prepared for a swaging operation by applying the tting in proper position on the end of the cable and temporarily attaching it thereto as by striking it with a hammer or by any other suitable means. The cable C with the fitting W temporarily attached thereto is then placed in the axial bore 64 of the work-holding guide 60. For this purpose the sectional halves of the work-holding guide may be separated in the manner illustrated in Fig. 5 to adapt the guide to receive the cable and thereafter the halves are brought together to retain the cable therebetween. The work-holding guide 60 having the cable C inserted therein with the spherical fitting W attached thereto may be inserted through the bushing 41 in the door 45 until its flange 62 seats against the face 63 on the bushing. The end of the cable C thus will be caused to engage the tongue 56 to properly position the Itting W in alinement with the semi-spherical recesses 54 in the dies 32 and 33. The dies 32 and 33, however, will not engage the iitting W due to their open or radially-spaced relationship.

The operator of the machine then may depress the treadle H9, see Fig. 6, against the action of the spring |20 to rotate the valve-plug H6. Turning of the valve-plug H6 in clockwise direction will position the passageway H1 to connect the ports H2 and |24 in the casing of the valve H3. Motive fluid from the pump |09 then will now through the conduit H| and inlet port H2 ofthe casing of the valve H3 and out through the port I 24 and conduit |23 to the port |06 in the cylinder |0| of the hydraulic motor 99 to apply pressure at the right-hand side of the piston |02',as viewed in Fig. 6. The pressure of the motive fluid on the piston |02 will cause ittO move toward the left and the piston-rod 98 connected to the lower end of the lever 90will rock 7 the latter in clockwise direction as Aviewed in Figs. 1 and' 6.

' Rocking movement of the lever 90 will be transmitted through its forked end connected to the pins 83 on the thrust-ring 82 to slide the sleeve '|9iinwardly or toward the right as viewed in Fig. 1. The operating member 'l5 at the opposite end of the sleeve 19 thus will be caused to slide the

wedges

68 and 69 forwardly from the position shown in Fig. 1 toward that shown in Fig. 3. The forward..movement of the

wedges

68 and 69 between the inclined faces 'I2 of the

hammers

28 and 29 and the outward faces of the dies 32 and 33 will cause the latter to be progressively advanced inwardly toward each other to closed position as they rotate and reciprocate around the work. As the dies 32 and 33 move inwardly toward each other to approach a closed position they engage with and progressively compress the spherical fitting W. Due to the semi-spherical form of the recesses -54 in the dies 32 and 33 they will conne the material of the fitting W while maintaining its spherical form and reducing it to a lesser diameter to cause it to tightly grip the cable C. It has been determined that the material of the fitting W will actually flow into the interstices between the strands of the cable C and take a tight grip thereon, practically as resistant to tension as the cable itself. Duringr the swaging operation the

hammers

28 and 29. the dies 32 and 33 and the

wedges

68 and 69 rotate as a unit with the spindle 1.

During a sWaging operation the hydraulic motor 99 will positively operate the lever 90, sleeve 'IS-and

wedges

68 and 69 whereby the wedges will progressively close the dies 32 and 33 with a predetermined rate of Amotion corresponding to the amountof motive fluid delivered to the cylinder ||J| of the hydraulic motor. The dies 32 and 33 will be closed progressively at a rate of motion as controlled by the hydraulic circuit commensurate with the proper rate of reduction of the work so that the machine will operate at maximum efficiency to apply the tting W to the cable C. The closing movement of the dies 32 and 33 will be limited by the engagement of the lever 90. with the abutment 95 on the bracket 93 and the motive uid being delivered from the pump |09 will thereafter escape throughthe relief valve IM and exhaust to the tank I 08.

At the completion of a swaging operation the treadle ||9 will be released and operated by the springA |20 to move it from the position indicated by dash-lines to the position shown by full lines in Fig. 6. The inlet port II2 in the casing of the valve- I I3 then will be connected to the port 2| by thepassageway |I'| in the valve-plug II 6to direct motive fluid supplied from the pump |09 through the conduit |22 and port |05 in the cylinder of the hydraulic motor 99 to the lefthand' side of the piston |02. Simultaneously, the port |24 in the casing of the valve 3 will be connected to the exhaust port 25 by the passageway IB in the valve-plug I I6 to exhaust motive uid from the right-hand side of the piston |02 through the conduits |23, |26 and l5 to the tank |08..

The piston |02 thus will be moved toward the right as viewed in Fig. 6 to rock the lever 90 in counterclockwise direction and retract the sleeve '|9.- The rearward end of the

wedges

68 and 69 being interlocked with the operating member '|5 also will be retracted and the rotating dies 32 and 33 will be moved outwardly away from each other by the. action of centrifugal force Yto the open position shown in Figs. 1 and'2. Opening movement of the dies 32 and 33 will release the swaged tting W to permit it to be withdrawn. The opening movement of the dies 32 and 33 may be adjusted to the proper extent to adapt the work to be inserted therebetween by turning the set-screw 94, see Fig. 1, which limits the rocking movement of the lever 90. The machine may be continuously operated in the manner explained above by periodically inserting a cable C in the axial bore 64 in the work-holding guide 60, inserting the Work-holding guide in the bushing 41 in the door 45 and depressing the treadle While the machine as illustrated in Figs. 1 to 5 is adapted particularly for applying spherical fittings W to cables C and for other similar work it is to be understood that by modifying the form of the dies 32 and 33 the machine may be fitted to apply annular fittings of different shapes to articles of other types. For example, Figs. 7 and 8 illustrate a form of die |30 and |3| for applying cylindrical bearing sleeves S to the reduced intermediate portion of forked rods such as used in the steering gears of automobiles. As shown in Fig. '7, the rod K comprises a straight portion M having an enlarged ball B at one end and a fork F at the opposite end. With such an article the bearing sleeve S must have an inside diameter greater than the outside diameter of the ball to adapt it to be slid onto the rod K. The sleeve S therefore will have a materially greater inside diameter than the outside diameter of the rod K and will require considerable reduction to cause it to seat thereon. If the sleeve S were to be swaged in the usual manner in a rotary sW-aging machine by moving it axially between the tapered recesses of cooperating dies, the relatively steep angle of the taper of the recesses would cause considerable diiliculty in retaining the sleeve in its proper position on the rod during a swaging operation. The machine of the present invention, however, is particularly adapted for applying such sleeves S to the rod portions M of articles of the type last described as the dies will swage the sleeve radially inward without exerting any longitudinal component of force.

To prepare the work for swaging. the sleeve S may be slid over the ball B onto the straight portion M of the rod K and located in the approximate position of the recess |32 in the dies |30 and |3|. Assuming that the spindle is rotating, the operator will depress the treadle H9, see Fig. 6 to cause the piston I 02 of the hydraulic motor 99 to move toward the left to rock the lever 9|) clockwise and advance the sleeve 'i9 and

wedges

68 and 69. The dies |30 and |3| thus will be advanced inwardly toward each other as they rotate around the work and rapidly reciprocated through a constant stroke. As the dies |33 and I3| are closed progressively the inclined sides |33 of the recesses |32 will engage the sides of the sleeve S to hold it in proper position between the dies. As the dies |30 and 3| continue to close they will swage the sleeve to reduce it until it is seated flxedly on the rod K as shown in Fig. 8 and the recesses 32 will confine the material of the sleeve to form a finished bearing boss. Preferably, the shaft M of the article K is flattened, knurled, or otherwise formed to interlock with the sleeve as the latter is swaged in place thereon.

It will be observed from the foregoing specication that the present invention provides a rotary swaging machine in which the dies are simultaneously rotated and reciprocated and progressively advanced inwardly toward each other during a swaging operation. It also will be ob served that the present invention provides hydraulic operating means for positively advancing the dies inwardly toward each other with a predetermined rate of movement to adapt the work to be progressively reduced in diameter. It will be observed still further that the present invention provides a machine which is of simple and compact construction and arrangement yand one which is eiiicient in performing its intended function.

While a preferred construction of the machine and several different forms of work adapted for swaging therein are illustrated and described herein, it is to be understood that modications may be made in the form and structure of the parts of the apparatus and that ttings of other forms and shape may be swaged in the machine withoutl departing from the spirit or scope of the invention. Therefore, without limiting myself in this respect, I claim:

1. In a rotary swaging machine, a pair of dies mounted for reciprocatory motion and having cooperating recesses in their opposed faces for engaging the work, one of said `dies also being provided with a projection in the form of a stop at a point adjacent its recess adapted to engage the end of the work to locate it relative to the point of application of the recesses thereto, means for ro-tating the dies, and means for reciprocating the dies to cause their cooperating recesses to swage the work.

2. A swaging machine for attaching annular fittings to articles of manufacture comprising a rotary head, a pair of dies reciprocable in said Number 10 head and formed with cooperating recesses in their opposed faces, one of said dies having a groove and the opposite die having a tongue adapted to enter the groove when the dies are moved toward each other, said tongue being adapted to engage the end of a rod or other part entered between the dies to locate the fitting opposite the reces-ses in the dies, means for rotating the head, and means for reciprocating the dies in the head to reduce the fitting to swage it on the rod or other part.

3. A swaging machine comprising a rotary hea-d, dies reciprocable radially in said head, said dies having a plurality of cooperating circular recesses in their opposed faces shaped to conform to the work to be swaged, one of said dies also having a pair of grooves in its working face spaced apart and located inwardly between the .recesses and said opposite die having tongues adapted to enter said grooves when the dies are closed together and acting as stops to locate a rod or other part with reference to the recesses in the dies, means for rotating the head, and means for reciprocating the dies to cause them to swage a fitting or other part at a point adjacent the end of a rod or other work inserted between the dies.

FRANK PATNAUDE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Dayton Feb. 28, 1893 Whyland Sept. 30, 1913 Frick Oct, 3, 1922 Cook Sept. 9, 1924 Perry et al Sept. 9, 1924 Abbey Feb. 15, 1927 Muller Aug. 18, 1931 FOREIGN PATENTS Country Date France July 13, 1906 Number