US1914235A

US1914235A - Tube flaring apparatus

Info

Publication number: US1914235A
Application number: US608051A
Authority: US
Inventors: David A Benbow; Kunz George
Original assignee: Frigidaire Corp
Current assignee: Frigidaire Corp
Priority date: 1932-04-28
Filing date: 1932-04-28
Publication date: 1933-06-13
Anticipated expiration: 1950-06-13

Description

June 13, 1933. D, A BEBOW Er AL lL914,235

TUBE FLARING APPARATUS Filed'Aprl 28, 1932 5 Sheets-Sheet vl u? )3Q Ev, N .EL h QE, B5 NG. mb R. vm uw NQ mw w L Q Rv D. A. BENBowEr Al.

TUBE FLARING APPARATUS June 13, 1933 Filed April 28. 1952A 5 Sheets-Sheet 2 y W M@ June 13, 1933. D.'A. BENBow Er AL' TUBE FLARING APPARATUS FiledfApril 28, 1952 y5 sheets-sheet 3 June .13, 1933. D. A. BENBow r AL 1,914,235

TUBE FLARING APPARATUS` Filed April 2a, 1952 5 sheets-sheet 4 then June 13, 1933. D. A. BENBow Er AL 1,914,235

` TUBE FLARING APPARATUS i Filed April 2a, 1952 s sheets-sheet 5 @214,- /Maww Ag Patented June I3, 1933 UNITED STATES DAVID A. BENBOW AND GEORGE KUNZ, F DAYTON, OHIO, ASSIGNORS T0 FRIGIDAIRE GOEPGRLTIN, 0F DAYTON', OHIO,

VA' GORPRATION 0F DELAWARE lTUBE FLLBING APPARATUS ipplicgtion niv-. 1Y pril 28,

end of the tuhe or conduit outwardiy against Y n stop lnieznher, removably cinniped around the hod,T of a tuhe and of such forni as, to w provide e iiare ot the desired shape end size entire end; ci the tum. Such practice has not been entireiy satisfactory because the operetor, upon striking the toni to drive the saine into the end of the tube, has not heid the too-i, uur hss he Je-en shie to determine if the tooi is heid, in perfect alignment with the iongi.- tudinai center of the tune. Therefore when .the toot is driven into the end ci' the tube out of eiignnient ci the center thereof, the tool Le hears unereniy vagainst one iraii portion of the tube and causes that portion of the ivali to engage the stop portimnv oi the inemioer, damped around the tune, heiore other portions of Athe ruhe Waii. causes the thiciiness of one portion of 'the 'wail of the tuhe to he deformed tshiie et the same time causin other portions off the tube waii not to be ered outwardly the required distance. A. dere inode according to the foregoing an mentioned method can not he clamped eveniy or ciaizeped with e uniform pressure throughout its cir-cuniferenceV hy ciamping nuts et connections desired lin conduits or tubes thus resuiting ieaks at such joints or connections in piping systems provided by the tutes. it has also been found that aresV formed in tnhes according to the foregoing mentioned method quite r'reqintiy causesv the :notai et the end of the tu to crack or 4o breek apart, due to the metal of the tube being crysteiiized, thus rendering the tube unsuitehie for use.

n ohiect of the present invention is to provide an improved method of and apparatus for forming a Hare on the end of a tube or conduit which are will be of uniformA thickness throughout its circumference and concentric'reativeto the longitudinal center of the tube or concentric with the diameter of .v the tube at the end thereof.

rss2. smal No. 608.051.

In carrying out ,the Jforegoing object it is a further oh1ect of the present invention to provide an improved apparatus having means which rolls the metal at an end of n tube outwardly to form a flare to which a predetermineduniform pressure can be applied throughout the .entire circumferential waii portion of the iiare when the tube is connected in a piping circuit or system.

Further objects and advantages 'of the invention will he apparent from the following l description, reference belng had to the acc nipenying drawings, .wherein a preferred prni oi the present invention is clearly snown,

in the drawings:

. Fig. i discloses a top pian vievv of a tube l dering apparatus constructed according to the present invention;

Fig. 2 is e side elevational view of the ap? parat-us shown in Fig. 1;

Fig. 3 is an eniarged longitudinal* Vertical sectional View of the apparatus taken on the iine 3-3 of Fig. 1;

Fig. i is a view similar to Fig. 3 hut showin the apparatus in a different position;

big. 5 is a vertical sectional view through the apparatus taken on line 5-5 of Fig. 3 showing the tube receiving device;

Fig. 6 is a vertical sectional view through the apparatus taken on the line 6-6 of Fig. 3 showing the clutch mechanism thereof;

Fig. 7 vis a verticalsectional view through the apparatus taken on the line 7-7 of Fig. 3 showing the connection between the driving member and the tube aring element of v the apparatus;

Fig. 8 is a vertical section through the spindle carrying member of the apparatus taken; on the line 8-8 of Fig. 3;'

Fig. 9 is a fragmentary sectional View similar to Fig. 6 showing parts of the clutch* mechanism in a disengaged position; and

Fig. 10 isV a view of the tube receiving opening of the apparatus looking in the d irection of the arrow 10 in Fig. 3.

to the drawings there is shown Referrin i: an apparatus 'suitable for curryone form o out the invention comprising an upper v `casing 25 and alower Acasing' 26 secured tou 2 aaiaaaa on shaft 27 within the enclosure meshes with v a relativel lar er spiral gear 31 (see Figs. 3, 4 and 7 ear 31 is secured against rotation relative to a shaft 32 by a key 33 and consequentlyrotates the shaft 32. However, the arrangement of key 33 permits longitudinal movement of the shaft 32 relative to gear 31. Gear 31 has an outwardly extending shank portion 34 formed thereon and which shank has a worm 35 formed on the -end thereof. Worm 35 meshes with a ring gear 36 (see Figs. 3, 4 and 6) secured by a pin 37 to a shaft 38 which shaft is journaled in bearings provided in the walls of casing 26. Gear 36 has, a hardened steel ring 39 firmly fastened thereto which ring is provided with va lurality of holes or openings 41. A plura/hty of hardened steel pins 42 are secured to a member 43 surrounding shaft 38 and spaced from the .ring 39 by a cam 44 also surrounding shaft 38 and through which the pins 42 pass. A spring located between the member 43,- which carries the pins 42, and the -inner surface of the wall of casing 26 normally holds and forces pins 42 into the openings 41 on ring 39. However, member 43 has formed thereon a camming surface 46 adapt-y ed to engage a 'vertically movable ypeg 47 for moving the pins 42` simultaneously with member 43 longitudinally yrelative-to gear 36, andring 39 secured thereto, for causing disengagement of the pins 42 from the openings 41 in ring 39 (see Fig. 9). 'llhe parts designated'by the

numerals

39, 41, 42, 43

and 46 thus provide a clutching mechanism for stoppin cam 44.

and starting rotation of the hen cam 44`is disengaged from 56 its drivinV connection with the shaft 38 or ear 36 t e shaft 38 freelyrotates therein. eg 47 is mounted in a suitable socket or bracket 48 and is normally held in a position to engage. the camming surface 46 of member 43 by

springs

49 and 50. Spring 49v bears against a shoulder formed on eg 47 and also against the inner wall sur ace of casing 25. The upper end 51 of peg 47 e111- tends through the top wall of casing 25 and is engaged by a forked end of an arm 52 pivotally mounted on casing 25 as at 53. The opposite end of .arm 52 is connected to a downwardly extending .rod 54 which rod is attached to a foot pedal arm 55 in any suitable lwell known manner. The spring 50 surrounds the rod 54 and applies its tension to this rod by having its ends clamped be- I tween any suitable rigid members one of which is on the rod and the other of which may be'. stationary. Thus the parts designated by the

numerals

47, 48, 49, 50, 52, 53,

`54 and 55 comprise a lock or lever mecha- 26. The casting 63 comprisesl a forkedportion between the legs of which fork the cam 44 rotates (see Fig. 6). The legs of the forked portion of casting 63 are shaped to `pass under the shaft 38 and the members mounted thereon in order to support the rollers 61 on opposite sides of shaft 38 and in alignment with the center thereof and with the center of the cam 44. The casting 63 has an upwardly extending hollowed out portion 64 which surrounds an enlarged portion of shaft 32 and is secured thereto to move longitudinally with this shaft. rl`he enlarged portion of shaft 32 is clamped to the hol-v lowed out portion 64 of casting 63 by clamp-l which receives an end 66 ofa shaft 67.l A.

wall of the hollowed out portion 65 of casting 63 is split as at 68 (see Figs. 3 and 4) and a bolt 69 passes through the metal of casting 63 at this split portion in order to firmly clamp the hollowed out portion 65 to the end 66 owfshaft 67. Shaft 67 is mounted in and passes through ya bearing 71 formed' in the lower portion of casing 26 ithin the enclosure. The casings 25 and 26bach have hollowed out portions which portions, when the casings are bolted together form bearings '7 3 and 74 for the shaft 32. The bearing 74 is disposed directly above the bearing 71 in shaft 67.A

Shaft 32 has its one end hollowed out'as at 7 6 and receives therein a shank portion 77 formed on. a member 78 (see Figs. 3 and 4). This shank portion 77 of member 78 is keyed to `the shaft 32 to rotate therewith by a pin 79 in any suitable'manner. Preferably the i `shank 77 is keyed to the shaft 32 so as to connection with the shaft32 as desert d( end portion 94 extending outwardly vto the spindles by A 83 forms a bearing on one side thereof 4for the member 78 and has a plurality of slots in its opposite side which side is threaded upon a bearing member 84 through which member 78 extends. A split band member 85 extends around housing 83 at the threaded connection thereof with. bearing member 84 and is tightly clamped by the bolt 86 to the bearing member 84. The lower portion of band member 85 is keyed to the housing 83 by a pin 87 and is also hollowed out as at 88 in order to permit the band membei' to straddle the shaft'67 and thereby prevent rotation of housing 83 (see Fig. 3). Member 78 has two angularly disposed hollowed out portions 91 provided therein..` (see Figs. 3, 4 and 8). A hole 92, having its center disposed at an angle relative to the longitudinal center of member 78, extends.

from each of the hollowed out portions 91 to the exterior of member 78. Holes 92 form bearings for a pair of shaft members or spindles 93 each of which vspindles have a tapered from the member 78. The opposite ends 95 or shaft members or rspindles 93 extend outwardly from the holes 92 into the hollowed4 out portions 91 provided in member 7 8. The ends 95 of spindles 93 each have a roller 95 mounted thereon by a lock nut and arel keyed pins 97 which pins extend through the ends 95 and into slots 98 provided in the rollers 96. The outer cylindrical edge of each of the rollers 96 is tapered as at 99 and adjustable screws 101 locked to member 78 bear against the ends 95 of'spindles 93 to force the tapered edge 99 of rollers 96-into tight rictional engagement with a corresponding tapered cylindrical surface 102 formed on the inner wall o housing 83 (see Figs. 3, 4 and 8). This engagementof surfaces 99 on rollers 96 with the cylindrically tapered surface 102 on housing 83 causes rotation of rollers 96 and consequently spindles 93 relative to the member 78 during rotation of member 78. Thus the spindles 93 rotate about an axis disposed at to the axis' of rotation of member 78 in which the spindles 93 are carried while the spindles 93 revolve about the longitudinal axis of the -member7 8. y

A means for receiving an end of a tube or; conduit and for clamping the tube against rot-ation while being held concentric with or in alignment with the longitudinal center of the rotatable member 78 is mounted adjacent the tapered ends 94 of spindles 93 (see Figs. 3, 4 and 5). This means comprises two superimposed members 111 and 112. These members 111 and 112 are separable from each other on a horizontal piane corresponding to the longitudinal center of member .78 and shaft 32. The upper memlwr 111 has a seml-concaved cut-out portion` 118 formed therein adapted to receive a simispindles an angle vmeans for alternatively larly shaped hardened steel pieoe'114 which is securely fastened to member 111 by a screw or the like 115. The lowermember 112 has a semi-circular convexed cut-out portion 117 :foi-med'y therein adapted to receive a similarly shaped hardened steel piece 118 which is securely fastened to member 112 by a screw or the like 119. The two

hardened steel pieces

114 and 118 cooperate when the members 111 and 112 are held or forced together, to orm a cylindrical 'opening adapted to receive the end of a tube or conduit designated by the dot and dash lines 121 shown in Figs. 3 and 4 of the drawings. Each edge of the

steel Y.members

114 and 118 forming the cylindrica opening for receiving the tube 121 are tapered as at 122 outwardly from the opening. v The ,tapered edge adJacent the 93 is for a purpose to be hereinafter more fully described while the tapered edge located on the opposite side oi

members

114 and 118 vserves to permit the tube 121 to be readily inserted into the openings. The members 111 and 112 are carried in vertical alignment by a casting 125 which casting is provided with an opening 126. Opening 126 in casting 125 includes an upper semi-cylindricai portion 127 having a radius equal to. and located on the same lane as the radius of the central opening iirmed by the

steel Y members

114 and 118. The lower portion 128 of opening 128 is of a greater diameter or radius than its upper portion (see Figs. 3, 4 and 19) and is for a purpose to be here# inater more ully described. Clamping members 131 extend vvertically along each edge o the upright portion of casting 125 and are secured to the east-ing 125 by bolts 132 (see Fig. 5". These clamping members 131 prevent horizontal movement of the members 111`and 112 while at the same time tending to rmly clamp these members 111 and 112 to the casting 125. The clamping members 131 or any other suitable means may be employed to secure member 111 stationary relative to casting 125.

The apparatus includes means for alternatively moving the lower member 112 vertically relative to the upper member 111. This moving member 112 up and down relatively to member 111 comprises a tongue 134 secured by any suitable means such as by the bolt 135 tothe end of shat 67 which shaft is grooved to receive the saine. The tongue 134 lies a raised portion 136 and tapered portions 137 and 138 formed on its upper edge which portions provide a cam. A roller 141 is mounted in an opening 142, provided in member 112, by shaft 143 .and this roller is the cam or portions 136 and 138 of tongue 134. When the tongue 134 is moved horizontally roller 141 engages and rotates upon either the tapered sur naee 138 or raised portion 136 o tongue adapted to engage 1 134 due to the weight of 130 member 112 which Weight is augmented by any suitable number of springs 133 (see Fia 5)- When the end of a tube or conduit to be flared is inserted in the opening,lformed by the complementary hardened steel pieces 114 f and 118, it is desirable to insure that the apparatus will receive a predetermined length only of the end of the tube. This therefore insures that the portion at the end of tubes to be flared or deformed by the apparatus will be uniform in length. To effectively carry out this desirability of requirement the apparatus includes a stop member 145 movably held in a vertical position, on the side of the member 112 facing the spindles 93, by a cross piece 146 stationarily mounted in any suitable manner upon the member 112 (see Figs. 3, 4 and 5). This stop member 145 is adapted to be moved upwardly so as to block the passage of a tube, during insertion of the end thereof, through the opening formed bythe hardened '

steel pieces

114 and 118. Stop member 145 is also adapted to be moved downwardly out of the path of the tapered Walls 94 of spindles 93 so that the tapered portions 94 of spindles 93 may be brought into engagement with the end of the tube member to be flared. Therefore stop member 145 has a nose portion 147 formed at its lower end which nose p'ortion is adapted to engage the tapered portion 137 or raised ortion 136 provided on tongue 134 (see i `igs. 3 and 4). An opening 148 in stop member 145 is located directly above the nose portion 147 formed thereon and is adapted to receive the end of a finger 151 provided on a member 152 which member is mounted on the tongue 134 at its connection with shaft 67. The nose portion 147 on stop member 145 is shaped to be received in the space provided between finger 151 on member 152 and the tapered portion 137 of tongue 134 in order to permit the tapered bottom edge of finger 151 'to cam or move the stop member 145 downwardly. When the raised portion 136 of tongue 134 moves away from roller 141 it engages the bottom edge of nose 147, on stop member 145, and thus causes stop member 145 to be raised or elevated into a position to block the passage of a tube to be flared through the opening formed by the members,

111 and 112. A pin 153'secured to casting 125 passes through an opening 154 provided in member 112 and extends through an opening 155 provided in stop member 145. Pin 153 serves to retain stop member 145 in assembled relation with member 112 during adjustment or removal of casting 125 from the apparatus. y

The upright extending portion of casting 125 is formed integrally with a base portion 161 which is adjustably or removably secured to an outwardly extending portion 162 on casing 26. @ne or more fastening means such :terasse as the `bolt 163 which pass through an opening'provided in a tapered side wall clamping member 164 is threaded in base 161 is employed for rigidly securing the casting 125 to the casing 26 (see Fig. 5). Base 161 of casting 125 has a hook portion 165 formed thereon and extending upwardly (see Figs. 3 and 4). A hardened steel angle `iron member 166 is secured by screws 167 to the hook portion 165 vo'f base 161 and serves to maintain the tongue 134 in alignment with the shaft 67 and in alignment with theshaft bearing 71. A square headed hardened stud 169 secured to base 161 and upon which the tongue 164 slides aids angle iron member `166 in'its function of aligning the tongue 134 and shaft 67 with bearing 71 while at the same time serving to maintain the member 112 in vertical alignment. An adjustable stop stud 171 threaded into an upwardly extending portion 172 formed on casing 26 regulates andv spaces the casting 125 and consequently members'111 and 112 at desired distances from spindles 93 to insure against deforming or changing the thickness of the outwardly flared wall of tube. The essential` elements or parts of the apparatus having been described and enumerated it is to ble understood that the apparatus also includes various other parts or elements necessary for the success- Iful operation of the apparatus such for example as pins, bushings, plugs and stops or the like not described in detail but ordinarily employed in the production of such apparatus. It is to be also understoodthat means for lubricating the various rotating, sliding or operating elements of our apparatus may be provided in the well known manner to` those skilled in the art.

Operation Before proceeding with an explanation of the 'operation of the apparatus it is desired to first point out that when the apparatus is placed in operation the driving means connected with the pulley 28 may operate continuously or may be `intermittently operated to cause rotation of shaft 32 and member 78 secured thereto. It is to be understood that the clutching mechanism including the elcments designated by the

reference characH ters

39, 41, 42, 43, 45 and 46 is effective only for moving the housing 83, shaft 32 and member 78 and consequently spindles 93 longitudinally relative to the members 111 and 112 lwhich members receive the end of the tube to bedeformed or flared outwardly. It is obvious therefore that as long as the apparatus is being operated by the driving means connected to the pulley 28, shaft 32. member 78 andspindles 93 will rotate irrespective of the longitudinal position thereof.

Assuming then that shaft 32. member 78 und parts attached thereto and adapted to move longitudinally therewith are in the po- 31, upon tube into the opening sition shown in F ig.'4 of the drawings when the apparatus is put into operation. The driving means connected to the pulley 28 causes this pulley to rotate and likewise shaft 27 and the gear 29 since gear 29e-nd pulley,28 are keyed to this shaft.A Gear 29 rotates gear 31 and consequently worm 35 formed onl the shank portion 34 ofl gear 31. Shaft 32, being keyed by the key 33 to Worm 35 and gear being rotated rotates member 78 and the spindles 93. `Worm 35 causes rotation of gear 36 and shaft 38 to which gear 36 is secured. However, since' the operator has not as yet pressed on the foot pedal or lever 55, peg 47 remains in engagement with the cammingsurface 46 formed on member 43 Aand thereby maintains the pins 42.out of engagement with the openings 41, provided in washer 39 secured to gear 36. Thus the clutching mechanism is in the position shown in Fig.'9 of the drawings and prevents longitudinal movement of the shaft 32, member 78 and spindles 93 until the operator actuates the foot pedal 55.y

During operation of the apparatuses just described the tube receiving means or device ofthe 'apparatus comirising the members 111 and 112 are separate while the stop member 145 is in raised position. rlhe operator may therefore pass a 126 incasting 125 and into the opening provided in members 111 u 52, which arm engages apparatus may and 112 until the end of the tube strikes the stop member 145 as indicated by the dot and dash lines in Fig-4 of the drawings.

y now be operated tocause the end' of vthe tube to be deformed or flared outwardly. wardly by the operator and carries rod 54 therewith to move the end of arm 52, located on the side of ivot point 53 opposite from rodl 54, upwar ly. This movement of arm the upper end -51 of peg 47, causes peg 47 to also move upwardly and be disengaged from the camming surface 46 on member 43. Member 43 upon being disengaged from the peg 47 is moved horizontally by the force of spring and moves the ends of pins 4 3 into the openings 41 provided in the washerV member 39 rigidly secured to the gear 36 as shown in Fig. 6 of the drawings. Since pins 42 pass through the cam 44 this cam will be rotated thereby and by gear 36 when the ins 42 slip into the openings or,

holes 41. T e cam 44 is thus caused to -revolvebetween the rollers 61 to move the rollers 61 and consequently the casting 63 longitudinally. Obviouslythe longitudinal movement of casting 63 also moves shaft 67, ton ue 134, finger 151, shaft 32, member 78, housing 83 and consequently spindles 93 longitudinally as shown in Fig. 23 of the drawings. This movement forces rollers 141 upwardly on thev tapered surface 138 and onto the surface 136 of tongue 1,34 and simultaneously or are in open position The Foot pedal -lever is pushed downforces stop member 145 down, out of the path of the spindles 93, by engagement of the stop member with the tapered surface 137 of tongue 134 and by engagement of thefinger 151 of member 152 wlth the openin 148 located above the lower end of nose 14% members 114l `and 118 to close against the members 111 and 114. v@losing of these members forces the tube, which 1s at this time located therebetween, against the upper wall of thesmall portion 127 of opening 126 in casting (see Fig. 3). .The

members

114 and 118 are so proportioned that they firmly .tionlust described the tapered ends 94 of spin es. 93 come into engagement with the end f the tube. The spindles 93 are rotating at this time about an axis disposed at an angle to the axis of rotation of the member 78 or are rotatin about an axis disposed substantially para lel to the tapered ortions` 122 on the

members

114 and 118. he rotating tapered ends 94 of spindles 93 therefore rol or spin a flare on the end of the tube while the spindles are being revolved about the axis of t e 'longitudinal center of the tube.

The rotation of member-'7 8 and the rotation and revolutions of spindles 93 .are governed or timed relative to rotation of cam 44, which cam moves the member 78 and v of stop member 145. Roller 141 therefore causes the' spindles 93 longitudinally, to insure that d16E when the cam 44'moves the spindles 93 away from the end of the tube, as" shown in Fi 4 of the drawings, deformed to provide a flare on the end there of of uniform thickness throu hout its circumference. Should the thic ness of the wall of one tube vary relative to the thickness of the wall of other tubes, shank 77 on member 78 will be moved back, against the pressure exerted by spring 81, into the hollowed out lportion 76 provided in shaft 32.

4Thus the spring 81 insures that the apparaa predetermined pressure tus will apply only upon the end of the tube to be flared. It is to be understood that when the operthis tube will be even y lili ator moves the foot pedal lever 55 downwardly and then immediately releases the same it releases the-lock which maintains the a rotates and will therefore disengage thev The clutchin' ymechanism is designed to cause the longitu lmal movement of member 78 and spindles 93 Ato stop'in the position shown in F ig. i of Ithev drawings.I From the foregoing description and b reference to Fig. 4 of the drawings it .will e seen that the apparatus nis in a position to permit the tu which has., been dared to be removed from the apparatus and to permit another tube to be placed therein to be dared.

The members lll and 112, forming the tube supporting device oi the apparatus, being separated as shown in liig. t of the drawings permits the tube and its flared end to be removed from the opening provided in the members 111 and 112. Removal of the dared ended tube from the apparatus is accom-- opening 126 in casting 125 downwardly into the larger portion 128 of opening 126 which larger o ening permits the flared endoi the tube to reely pass therethrough. After .the flared ended tube has been removed from the apparatus and while the apparatus is in the position shown in Fi d of the drawings another tube may be inserted, by the operator, into the opening 126 and into the tube receiving opening provided in lmembers 111 and 112. The tube is pushed through the openings until its end strikes member which member is at this time in its u per position tending to block the passage o the tube through the openings a greater distance than is required. @bviously the operation hereinbefore described can be repeated as desired to form a Hare on the end of a plurality of tubes with greater speed than has heretofore been carried out with previously known methods. It is to be understood that while an apparatus comprisingtwo spindles is disclosed an apparatus including a Single spindle may be employed. 'llhe use of an apparatus including two or more spindles is preferable because the metal at the end ot *the tube, not engaged by a spindle, will not be deformed, as much as with the use of a single spindle, while the spindles are rollingv in order to avoid crystallizing the metalo1 terasse wardly and this gradual rolling or spinning method of deforming the end of the tube prevents the metal of the tube from splitting or cracking or being crystallized. The improved apparatus furthermore insures that the metal of the Hare on the end of the tube will be uniform in thickness throughout its circumference and that the flare will be concentric relative to the longitudinal center `of the length of tubing yor concentric with the cross-sectional diameter oi the tube at its end.k 'llhus the diculties heretofore enumerated with respect to other methods of forming a tlare on the end of a tube are eliminated by the improved apparatus disclosed.

`While the form ot embodiment oi theinvention as herein disclosed, constitutes a preierredform, it is to be understood thatother terms might be adopted, all coming .within the scope of the claims which follow.

`What is claimed is as 'ollowsz 1. An apparatus of the character described comprising in combination, means adapted to receive a portion of a tube, a member disposed in alignment with and rotatable about the axis of the tube receiving portion of said means, means for rotating said member, means carried by said memberand movable longitudinally relative to said iirst named means, means for moving said last named means relative to said first `named means during rotation orP said member, and

Sti

tilt

means for rotating said third named means the wall of said tube outwardly t the en thereof. l

2. An apparatus of scribed lcomprising in combination, means adapted to receive a portion of a tube, a member disposed inalignment with and rotatable about the axis of the tube receiving portion oli said means, means for rotating said member, means carried by said memu ber and rotatable relative thereto, said third named meansand said member being movable longitudinally relative to said rst named means, means for simultaneously vmoving said member and said third named means relative to said tirst named means during rotation ot said member, and means for rotating said third named means about an axis disposed at an angle to the axis oi rotation of said member during movement ot said member and said third named means relative to said first named means for spinning the wall or said tu outwardly at the end thereof.

3. An apparatus of the character described comprising in combination, means adapted to receive a portion of a tube, a member disposed in alignment with and reitetable about the axis ot the tube receiving porthe character de-V Jill@ tion of said means, means carried by said member and rotatable relative thereto, said .the axisof the tube receiving portion of sai second namedmeans being movable longitudinally relative to said first named means, means for simultaneously rotating said member and for moving said second named means relative to said first named means,

and means for rotating said second named f l l means about an axis disposed at an angle to the axis of rotation of said member during movement of said second named means rela, tive to said first named means for spinning the wall of said tube outwardly at the end thereof.

4. fAii apparatus of the character described comprising` in combination, means adapted to receive a portion of a tube, a member disposed in alignmentA with .and rotatable about means, means carried by said member and rotatable relative thereto, said second named means and said member'being movable longitudinally relative to said first named means, means for rotating said member and for simultaneously7 moving said member and said second named means relative to said first named means during rotation of said mem'- ber, and means for rotating said second. named means about an axis disposed at an plurality of spindles carried by said meinber and rotatable relative thereto about an axis disposed at an angle to the axis of rotation of the member, said spindles being movable longitudinally relative to said first named means, and cam means for causing said spindles to move relative to said first named means during rotation of said member for expanding the wall of said tube `out. v

wardly at the end thereof.

6. An apparatus of the character described comprising in combination, means adapted to receive a portion 'of a tube, a member disposed in alignment with and rotatable about the axis of the tube receiving portion of said means, means for rotating said member,.a plurality of spindles carried by said member and movable longitudinally relative to said first named means, cam means for causing said spindles to move relative to said first named means during rotation of said meinber, and means for rotating said spindles about an axis'. axis of rotation of said member' during movedisposed at an angle vto the named means for s inning the wall of said tube outwardly at t 4e end thereof.

7. The method of forming a flare on an end of a tube member b engagement thereof with an element carrie by another member which consists in, rotatingone of said members and revolving the element about an axis common to .both of said members while simultaneously rotating the element about an axis disposed at an angle to thevaxis of both of said members, and moving one of said members toward the other of said members to cause the element to engage the'tube and to expand the wall of the tube outwardly at the end thereof.

8. The method of forming a flare on an end of a tubeby engagement thereof with an element carried by a rotatable member d which consists in, holding the tube against rotation, rotating the member and revolving als the element about an axis common to the longitudinal center of the tube while simultaneously rotating the element about an axis disposed at an angle to the longitudinal center of the tube and the axis pf said member, and moving the member toward the tube to cause the element to engage the tube and to expand the wall of the vtube outwardly at the end thereof.

9. The method of forming a flare on an end of a tube by engagement thereof with a spindle" which consists in, `holding the tube against rotation, revolving the spindle about an axis aligned with the 1d of the tube while simultaneously rotating the pgitudinal center spindle about an axis disposed at an angle to the longitudinal .center of the tube, and moving the spindle into engagement with the inner wall of the tube to expand the wall of the tube outwardly at the end thereof.

10. An apparatus of the character described comprising in combination, means adapted to receive a portion of a tube, means revolvable about the axis of the tube receiving'portion of said first named means, said relative to revolutions thereof about an axis disposed at an angle to the axis of the tube receiving portion of said first named means,

' means for revolving said second named means, means for rotating said second named means during revolutions thereof, said second named means being movable longitudinally relative to said first namedmeans,

and means for moving said second named means into engagement with said tube for spinning the wall of the tube outwardly atthe end thereof.

In testimony .whereof we hereto affix our l signatures. 4

DAVID A. BENBOW.

GEORGE KUNZ.

mentof the spindles relative to saidl first A .second named means also being rotatable p