US2639757A - Apparatus for forming metal articles - Google Patents

Description

May 26, 1953 H. R. cHEEK l2,639,757'

.APPARATUS FOR FORMING METAL ARTICLES Filed March 25, 1946: 4 Sheets-Sheet 1 May 26, 1953 H. R. cHEl-:K 2,539,757

APPARATUS. FOR FORMINCMETAL ARTICLES Filed march 25, 194e 4 sheets-sheet 2 May 26 1953 H. R. CHEEK APPARATUS FOR FORMING METAL ARTICLES 4 Sheets-Sheet 3 Filed March 25, 1946 May 26, 1953 H. R. cHE-t-:K APPARATUS FOR FORMINGMETAL ARTICLES Filed March 25, 1946 4 Sheets-Sheet 4 M fw W Illini!! Patented May 26, 1953 ff L a sho Fig. 8 is a view taken on the line 8-8 of Fig. 1.

Fig. 9 is a sectional view taken on the line 9 9 of Fig. 2.

Fig. 10 is a view taken on the line Ill-I0 of Fig. 2.

Fig. 11 is a view taken on the line II-II of Fig. 1.

Fig. 12 is a view taken on the line I2-I2 of Fig. 2.

Fig. 13 is an enlarged view of the locking means which controls proper cooperative positioning oi' the forming heads and corresponds to a transverse sectional view through the structure shown in Fig. 9.

Fig. 14 is an enlarged view of the locking means for securing the adjustable ring 82A which determines the degree of relative movement of the forming heads to bring the dies into proper forming position.

Fig. 15 is a view illustrating the successive degrees of forming onan article to be formed.

Fig. 16 is a view showing the movement of one forming die relative to the other.

Fig. 17 is a view further illustrating the method of forming as disclosed by this invention.

Referring to the drawings, the apparatus consists of a movable headY I forming a part of the parent machine, and supporting a die carrying element, and a stationary head 2 forming a part of the parent machine and carrying a movable die element. Suitable means (not shown) are provided in the parent machine for producing reciprocatory movement of -the movable head I to bring the die elements into cooperative relationship for forming of anarticle positioned therebetween. This apparatus may be mounted on or used with any suitabletype of parent machine.

The die carrying element mounted on the movable head I of the parentmachine consists of a cylinder 3 having aiiange 4 by which the cylinder 3 is secured to the movable head I as by means of machine screws 5. The uppermost end of the cylinder 3 is providedwith a removable cap 8 screw threaded into the top of the cylinder and having a central bore 1 for receiving a reciprocable rod 8 which carries on its bottom end a head 9 for engagingthe part to be formed.

respect to the lower surface of the enlarged end Such head 9 may befof any suitable shape and is removable from the rod 8 so that substitution of heads of different size and shape may be made as desired by being screw threaded into the lower l end of the rod 8 as at I0.

The head 9 is resiliently held in its full down. f1

position by a springA II interposed between the under side of the cap 6 and an annular shoulder I2 on the rod 8, downward movement of the rod 8 and head 9 being limited by a cap I3 screw threaded on the top end of the rod 8 and of such diameter as to -bear against the upper face of the cap B when the rod 8 is in its down .posi-- tion.

Extending through a bore I4 in the movable head I of the parentmachine is a sleeve I5,.such sleeve I5 being held against rotary movement with respect to the movable head -I by a, key I8 carried by the sleeve and intertting with a keyway I 1 1n the movable head I, but being capable of vertical movement with respect to the movable head I. Downward movement of the sleeve I5 is limited by a nut I8 engaging with threads I8 on the uppermost end of the sleeve I5, and the sleeve I5 is resiliently urged toward its down position. where the nut I8 bottoms on the upper side of the movable head I, by a spring 20 which is interposed between the top of the nut I8 and an adjustable nut 2I contained within the cylinder 3, and which latter nut may be adjusted to vary the compression forces and the resistance of the spring 20.

The rod 8 carrying the head 9 extends downwardly through the bore 22 of the sleeve I5 and has mounted thereon a bushing 23 having an angular face 24 cooperating with the angular face 25 on a bushing or padv26, which is screw threaded into theboreof the sleeve I5 as at 21. Such bushing 23 is resiliently urged into seated relationship with the bushing or pad 26 by means of a spring 28. interposed between a shoulder 29 formed by an enlarged bore 30 in the sleeve I5 lar surface of the bushing or pad 28, such surfaces being urged together by the spring 28 serves to center the rod 8 within the central bores of the sleeve I5.

In an enlarged bore 3| in the lower end of the sleeve I5v is mounted what in this instance is an annular die element v32 having a die face 33 for forming threads in a metal cap, although it is understood that the die face may be of various congurations or contours as desired. The die 32 is held within the enlarged threaded lower end of the enlarged bore 3| by a nut 34, and the die 32 is positioned in a predetermined position within the enlarged bore bya pin 35'which cooperates with an opening 35 in the sleeve I5'and an opening in the top of vthe 4die element 32. It will be understood thatthe head 9 of the rod 8 is of such size as -to pass upwardly through the die, as will be hereinafter described.

As shown in Figures l and 3, the enlarged lowermost end of the sleeve I5 is externally threaded as at 31 to receive a ring 38 carried by a nut 39, and which nut 39 is adjustable to vary the position of the bottom .surface of the ring 38 With of the sleeve I5, and therefore the distance which the sleeve I5 moves e-into the lower head as and for the purpose hereinafterdescribed. To lock the nut 39 and ring 38 in adjusted position there is provided a spring-pressed nger 40 (Figs. 2 and 3), one endvof which normally engages grooves v4I in the nut 39 to lock the nut against rotation relative to the ring but which may be disengaged .from such grooves .to permit adjustment of the ,nut and the ring. `It is noted that the ring 38 is swivelly connected to the nut and so rotates on sleeve portion 31. The pawl 40 locksv the nut 39 and ring 38 against relative rotation and since both the ring 38.and nut-39'are threaded on the 'sleeve portion 31, the ring and nut form-alock nut combination to prevent their joint movement on the sleeve portion 31 when the paw140 engages grooves 4I in the nut 39.

Mounted in the lower stationary head 2 of the parent machine is a sleeve 42 (Fig. 11) having a flange 43, -by which the sleeve is secured to the under side of the stationary head 2A as by means of machine screws 44. Interposed between the flange 43 and the bottom face of the head 2 is an annular bushing 45 the purpose of which will be hereinafter described. The sleeve 42 has a reduced neck portion 46 extending upward-ly into a rbore 41 in the stationary head 2. Mounted in the internal bore ofthe sleeve 42 is an upper bearing 48 and a lower bearing 49 in which a sleeve -50 rotates, and secured to the lower end of the sleeve 50, which extends beyond the bottom end of the sleeve 42, is a. pulley or other means 5I for `connecting a source of power thereto, such assenso pulley being secured." tothe sleeve.V 5w as' by means of a key 53 interitting with a. keyway: inthe pulley, as well' as set screw" 518 of.v whichthere'may be any desired number. Thevbearingslil and' 49 are held in proper spaced? relati'ondby ab spacer bushing 551, and; there is. a buslflingl 56 threaded into the lower end of the sleeve 42 for' holding the bearing' 49 andproviding a bore for" a suitable grease retainer 51, andlthere-isA a spacer" bushing 56! positioned between the bearing i9 anda slinger ring 58A- which carries anyileakag'eaway for deposit a suitable receptacle (not shown).. The upper bearing 48 is positioned against shoulder 59 on the upper en'dofv the sleeve` 5U;y

Mounted in the bore` 6010i! thev sleeve ll= isre sleeveV 6L Asshown in Figures lli and12,` the sleevev Bl is. oiconsiderablyless diameter through its mediall portion than the internal diameter of the bore 6U of' sleeve 50, such differences in diameter being providedA so thatthe.' sleeve" G'l may be moved eccentrically' ofthe bore; 6G; as. will?. be hereinafter described; I'Ehe' upper. endl. of the sleeve 61` is enlarged and shaped to' provide a cam memberv 62, which coacts with a camsurface 6 Sliormed. internally in theup'per end of: the sleeve 50. At the lower end" of the sleeve: 6'.I'- therel is provided a. cam. member 63"' (Figures 1 and 2) which is maintained on the lower end. ofi the sleeve 5|: byy a nut E4, and; whichiskeyedi tof the lower endl` of.' the sleeve Gl? by akeyf (Figure. 2.)I carried by the sleeve ande-cooperating wither-key#- watr 56' iny camGS. Thisc'am 63 hasacam. surface- 61: cooperating with. a cam:l surface 6B: pro-v vided. internally of the` drivingpulley. 5I. Thus; ver-tical movementv of' the' sleeveI e If will produce an eccentric positioning of thev sleeve (il with respect to the internal bore E9!- offthe sleeve. 5D as clearly illustrated in Figs. 2` and 12. Thevr upper endl of the sleeve 6l: is keyed to the sleeve 59: by means-of a keyA 691whichcooperateswithfakeyway 19. inthe upper endv of the sleeve 53 tolsecure the sleeves 5I and 5B! together!v for. simultaneous rotation, such mounting at the samel time permitting' a verticali movementof. the'sleeve: 5 I. with respect to the sleeve 50,. since the keyway lll is angularlydisposed. on the same plane asathe` face of.' the cam 63.

Mounted in bearings ll and 1.2v within the sleeve 6l is a: rod 13; Figureszand 11,..the rodl being so mounted as not to be rotated by rotation of.` the sleeve' 6I. The rod 'L3 moves into-and out of.` eccentric; relation. with respect' to'.` the driven sleeve 50.- with like movement of. the. sleevev Bil whereby rotation. of. the sleeves5ll. ands land ec.- centric positioning of the sleeve SII and. the ro'd 13 will produce an.- orbital-movement' of.'v the rod 13; The rod 1.3- hasla an opening 14 in the top thereofl toreceive a die member'. 15T having vadie congurationli ongoneendthereoff, the die mem'- ber being heldl inv the openingA 'lill by a wedg'ing action produced: between the opening Tf1-and the' diev member 15 through tightening'. an';a1b`orv 1:1 extending upwardly through vthe rod's 11i-andz screw threaded into the diememben l 5 -as= at 181, the y ar'- bor l1 being provided on itslowerl end-withanut 1&1 so that it may be tightened? by' the usel. of a suitabletool.

'Rhei uppermost" ends, of thev rod:` 13l has; an annular enlarged portion Bilv which; rests` upon anl annular shoulder 8| on a ring' 82'.V This annular. enlarged portion` B- is so held that it and the other attached. rod IZ-l4 mayv move universally laterally` in. any. direction i. e. radially with respect tothe axisY of rod 13but.held against rotativemovement.. As shown', the I auf nular' emerged portionwis-providedfwith: two

key-ways 83 (Figs. le and` 3).- on'itsfzupper side; such keyways being diametrical'ly oppositely dis.v posed 180 from. each other.. An'annular'ringf is positioned between thel upper side of.' theA annui lar portion 8102 and thev under" surface ot a plate 86 forming' a partoflthev ring. andisprovidedwith keyways 81 matching ther keyways' 83;. Keys- 88 intert. with the matching; keywaysws-andl 81. Disposedin the upper surface ofthe ring-85l and the under'sur'face. of the plate at; but locate-190 from the keywaysl 83 andi. 811,1 are keywaysf' and 9U (Fig. 3).', receiving: keys itin' Thus', thef annu` lar enlarged portion may: move laterally uni'- versally, i'. e; radially, in any: direction. i.` e... with respectto the axis' of. rod. 13S, but is' held against rotative movement with respect tothe axis of 'rod 13 since: the stationary sleeve: t2` and ring? 824 are held 'against' relativeV rotative movement by -a key 42 carried by thesleeve 421'anfd intertting with a-ke'yway 92 in' the ring'82'.

The ring 82 rest'supon the upper endl of aplu'- rality of'pins Si! which are annularly' spaced@ as shown in Fig. 2 and Fig. 33, which extend upward/ly through the bushing 45 disposed' between the sleeve 42' and the stationary head 2;. The pins 93? have shcmlders'f` 94.' which limit'. their 'upfward movement andthese pins are urged towards their uppermost p'ositionbye springs: 95 disposed in" bores- 961 in the sleeve' 4'2. andi resting". on the upper en'cl' of.' threaded screws4 914 which maya-be adjusted upwardly or' downwardly' to* vary the compression resistance of' the springs 95. Such spring and pin arrangement resilientlyf'holds. the ring 82 in itsy upward' positionl but permitsv downlward movement thereofv under' pressurel Thei'an'- nular bushing 45 has ari-'annularraisediportion S8 to hold suchbushin'gagainst lateral'- movement.

The uppermostl end of the ringv 82 is threaded to receive an internall'ythr'eaded ring or nut 32"va (Fig. le) which is adjustableupwardly or 'downwardly on the ring'82"v to. control the limit lof downwardmovement' of the' ring 8122 with respect to the sleeve' 42' by bottoiningforr contactingv pins 2a' (Fig-2) disposed in annular' spaced? relation around 'the borel inthe stationary` head 2J. vSuch adjustment determines the degree off' orbital movement'- of the male die`r as hereinafter described.` A1' lockingmeansE (-'Fig's- 3 andY 14)' for maintaining the ring or nut 82W" in adjusted' position4 is provided', this lockingk m'eansy consisting ofa spring-pressednger 99` carried by 'the ring 36, and having an endv |00 adapted' to. beurge'd into engagement with `grooves` I''l on thev 'outer circumferential` surface of' the ring or nut i323'.

The plate 8G issecured to-thelupper' end or the ring t2 by screws |62I (Fig-."9`1)` and' has a central bore' |03-` in which is disposedlthe supporttv for the-article to be for-ined'. Such' support (iiiifgsl, l, 2, 5, and 6) comprises acentrally' apex-turen plate liil fitting within the central bore of the ring 86 and having adownturnedrlange Iii-S at its outer circumference to form a receptacle for a centrally apertured platey i051 Disposed be'- tween the plates" |04: and l IBG-isiacen'trally apertured plate |01, Fig. 5, having a beveledvedg'e tilt which cooperates withfa bevel 4lillcn'tlie ringy IM. The entire assemblyis limited'in its upward movement by screws IlllFig. 9)' andg isurged toward its uppermost position' by aispri'n'g -H inthe bore H53' and disposed' between theunderA side oft the plate I 0B' and the upper" surfaceL of` the enlarged annular portion 80" of the'rod13. The'article A to be fforrnedrests on the intern'radiate"A plate HPI, andv the male die'vl 1'5 .extends-finto the* aligned central apertures in the plates. Since` the intermediate plate |01 may freely move laterally universally in any direction when the parts are in operating position, as hereinafter described, the article and its support will follow the orbital path of the male die element so that the article tobe formed will be in substantially point contact with the female and male dies.

To prevent misalignment of the male and female dies and 32 and maintain the dies 'in alignment, as well as to preventl breakage or injury to the machine parts, should all parts not be in proper position to operate or be operated upon when the upper head and die carrying element is moved into or toward cooperative relation, the central bore of the plate 86 is provided with two vertically disposed grooves H2 (Fig. 9). The ring 38 carried by the enlarged lower end of the sleeve I5 is provided with diametrically opposed depending ears |I3 adapted to t into the grooves II2 if the upper and lower heads are in proper alignment. Each tongue or ear II3 is provided with a notch II4 having a cam surface H5 for cooperation with a cam surface I I6 on a sliding key II1 mounted for horizontal sliding movement in ways or T-slots I I8 in the plate 85 and normally held out of engagement with the notches I i4 in the ears I I 3 by suitable means (not shown). Positioned in vertical openings IIS in the plate 86 are pins II9 held down by clamps IIS engaging flanges I2Il on the bottom of the pins the clamps H9 being secured to the lower head 2 of the parent machine by machine screws IZI. The upper end of the pins I I9 are provided with cam surfaces or stepped portions Should the parts be in proper alignment, the keys I I1 will be moved inwardly by the engagement of a cam surface I24 on the keys I I1 until they en gage the notches IILI in the ears IIS, as shown in Fig. 13, thereby locking the die carrying elements together. However, should the parts not be in proper aligned relation, the keys will be prevented from moving into the notches I I4, and the parts cannot then move into cooperative relation, and the dies will be held in non-operating position by the keys bottoming on top of the pins IIB.

Should the parts not be in proper aligned relation and held apart as hereinbefore described, provision is made toprevent breakage of the parts by pressure exerted between the movable heads I and 2 of the parent machine. In such an event, the sleeve I5 will be moved upwardly against the resistance of the spring and the rod 8 will be moved upwardly against the resistance of the spring Il. This resilient mounting will obviously prevent breakage of parts. Also, such resilient mounting permits the use of the forming apparatus in parent machines which have harmonic motion, giving sumcient time for the forming action.

In the operation of the apparatus and the performance of the method, assuming the parts to be in the unoperative position, as shown in Figure 1, an article A to be formed is placed upon the plate |01 over the central aperture therein as shown. Then, the head I with its associated die-carrying element is moved towards the head 2 and its associated die-carrying element to bring the parts of the apparatus into position for forming the part A between the female die member 32 and the male die member 15.

As the head I moves towards the head 2, the pad 9 contacts the part A to hold it in position, and continued movement of the head I towards the head 2 causes the enlarged lower end ofthe sleeve I5 to contact'the plate |04- and move the plate '|04 and its associated plates downwardly against the resistance of the spring I II, such downward movement bringing the die element 32 into cooperative aligned position with the die element 15, the part A being disposed between the die elements.

The head I continues to move toward the head 2 until the ring 38 bottoms on the top of the plate 86 and produces a downward movement of the ring 86 and the parts carried thereby, including the sleeve 5I and rod 13, and movement of the cams 60 and 63 along the cam surfaces 63 and 61 to move the sleeve 5I, the rod 13, and the male die 15 eccentrically of the bore 60 of the rotatable sleeve 50. Assuming all of the parts to be in proper aligned position, the tongues II3 on member I5 (Fig. 8) enter the vertical grooves II2 in the bore of plate 86 and the keys |I1 are moved horizontally by the cam surfaces on the pins IIS on plate 86, as shownin Fig. 13, to lock the parts in the operative position, shown in Fig. 3. After the parts are thus looked in operative position, the plate 86, die 32, rod 13, die 15, and sleeve 6I are forced downward in unison by further movement of the head I, the cams 62 and 63 acting to move the sleeve 6, the rod 13 and the male die 15 eccentrically of the rotatable sleeve 50 with the result that the die 15 is brought into active cooperative relationship to the die 32. It being understood that the sleeve 5i) is continuously rotating, as is the sleeve 6I, while the rod 13 and the male die are not rotating, such eccentric positioning will cause the male die to move in an orb-ital path relative to the female die. This is clearly shown in Figs, 3 and 16 wherein the regions designated E, F and G on the die member 15 serve to illustrate the fact that the die member 15 in its orbital movement does not rotate about its own axis and yet different portions of the die 15 contact the work A. It is noted that the rotation of the die 15 about its own axis and turning movement of the die 15 relative to the female die structure is prevented by the keys 88 and 9|, and that, as a result, the regions E, F and G on the die member maintain their angular positions as shown in Figure 16. Downward movement of the sleeve 82 is limited by the ring 82a bottoming on the annularly spaced pins 2a As clearly shown, the die face 33 of the female die 32 is greater in diameter than the diameter of the male die surface 16. Thus, when the male die is moved eccentric to the female die, it carries the part A to be formed with it into engagement with the forming surface of the female die, and results in a minimum angle of incidence between the dies for forming of the part A between the dies. This is clearly illustrated in Fig. l6. Such arrangement and action between the dies also produces a forming by a sliding and wiping action, and in a progressive manner. In Fig. 15 is shown the forming of the threads to successively greater depths by the cooperative action between the dies hereinbefore described.

To overcome the difliculty heretofore experienced in having the apices |99 of, for example, threads produced on the formed part being so thin as to fracture, in accordance with 'this invention, the forming surfaces of the male and female die elements are so formed and the surfaces thereof which produce the leading and lagging sides of the threads are of such relative angularity and form, and the male member producing a wiping action on the article such that "assurer l"111 for radial movement with respectl thereto; means for moving said second sleeve radially and longi- Itudinally lwith'respect to said rst sleeve, ae die member carried by said second sleeve, means acting on said die member for vn'laintainingl a xed v.

angular relationship between said die-'member and said supporting structure but allowingrotation of said die member about the axis of said first sleeve, and resilientl means acting between said iirst and second sleeves to normally bias said die member in a central position on the axis of rotation of said first sleeve, and a second'die member arranged to coact with said first die -member, said second die member being mounted in fixed angular relationship tosaid supporting structure. v

7. In a forming device of 'the character `described, a stationary supporting structure, ajrst rotatable sleeve rotatably mounted on said structure, a second sleeve mounted within said-:first ,l

sleeve for simultaneous rotation therewith 'and for radial and longitudinal movement with respect thereto, cam means disposed between said rst and second sleeves and operated upon said longitudinal movement for positioningsaid second sleeve radially of said rst sleeve, means'acting on said die member for maintaining- Aa xed angular relationship betweenv said dien-member and said supporting structure but lallowing rotation of said die member about the axis of said i first sleeve, an article supporting ring encircling said die member, and means resiliently mounting said ring on and for independent movement relative to said first sleeve, and a second'die member arranged to coact with said Vrst die.;

member, said second die member beingl mounted in xed angular relationship to said supporting structure. y H 8. In a forming device of the'character described, a stationary supporting structure, an outer power driven sleeve rotatably mounted on said structure, an inner driven sleeve mounted within said outer sleeve for simultaneous rotation therewith, guide means between said inner and outer sleeves allowing guided movement of said inner sleeve both in its longitudinal direction and in a radial direction with respect to said outer sleeve, a die membervmounted on said inner sleeve, means maintaining a xed'a'ngular relationship between said die member 4and said supporting structure but permitting its movement in an orbital path about the axis of said inner sleeve, cooperating cam means between said inner and outer sleeves whereby said inner sleeve is moved radially with respect to said outer sleeve upon -application of a force to said innersleeve along its longitudinal axis, and a second die member arranged to coact with said iirst die member, said second die member being Omounted in iixed angular relationship to said lsupporting structure. A. v

9. In a forming device ofthe character described, a stationary supporting structure, an outer power driven sleeve rotatably mounted on said structure, an inner driven sleeve mounted within said outer sleeve for simultaneous rotation therewith, guide means between said inner and outer sleeves allowing guided movement of said inner sleeve both in its longitudinaldirection and in a radial direction with respect to said outer sleeve, a die member mounted on said inner sleeve, means maintaining a xed angular relationshipbetween said die member and' said'supfporting structure but permitting its movement .in an orbital path about the axis of saidouter sleeve, cooperating cam means between said inner 75 and outer 4sleeves whereby' vsaid inner sleeve is lmoved radially with respect to said outer sleeve upon application of a force to said inner sleeve along its longitudinal axis, and resilient means gacting between said outer and inner sleeves to normally bias said die' member in a central posi- 'tion on the axis of rotation of said outer sleeve, and a second die member arranged to coact with Vsaid rst die member, said second die member being mounted in fixed angular relationship to said supporting structure.

10. In a forming device of the character described, a stationary supporting structure, a first assembly comprising: an outer power driven sleeve rotatably mounted on said structure, an inner driven sleeve'mounted within said outer sleeve for simultaneous r'otation therewith, guide means between said inner and outer sleeves al- 'lowing guided movement of said inner sleeve both 4in. its longitudinal direction and in a radial di- -reotion with respectl to said outer sleeve, a iirst 'die member mounted on saidinner sleeve, means maintaining a fixed angular relationship between said' die member andisaid supporting structure but permitting its movement in an orbital path aboutv the axis of said inner sleeve, cooperating cam'means between said inner and outer sleeves wherebysaid inner sleeve is moved radially with `respect to said outer sleeve upon application of a force to said inner sleeve along its longitudinal axis; a second assembly movable relative to -'sai-d i'lrst assembly and axially aligned therewith,

said second assembly comprising a second die .member positionable to encircle said rst die member, and means mounting said second die member and effective to move said inner sleeve radially with respect to said outer sleeve, said second die member-being mounted in fixed angular relationship to said supporting structure.

11. In a forming machine of the character described, a stationary supporting structure, an outer power driven sleeve rotatably mounted on said structure, an inner driven sleeve mounted for movement in said outer sleeve in its longitudinalf direction and in a radial direction with respect to said outer sleeve and for simultaneious rotation therewith, cooperating cam means -between said'inner and outer sleeve whereby an application of force to said inner sleeve along its longitudinal-axis results infradial movement of said-inner sleeve in said outer sleeve, a die -member mounted on said vinner sleeve, means mounting said die member on said inner sleeve whereby said'rdie member is maintained in xed angular relationship with respect to said sup- :portingstructure but permitting its bodily movement in an orbital path about the rotational axis of said vouter sleeve, and adjustable stop means between said inner and outer sleeves for limiting the radial movement of said inner sleeve with respect to said. outer sleeve and a second die member arranged to coact with saidrst die member, said second die member being mounted 'in fixed angular relationship to said supporting structure. "12. In a forming machine. of the character described, a stationary supporting structure, an outer power driven sleeve rotatably mounted on said structure, an inner driven sleeve mounted for movement in said outer sleeve in its longitudinal direction and in a radial direction with respect to said outer sleeve `and for simultaneous rotationtherewith, cooperating cam means between said inner and outer `sleeves whereby an application -vof force to said inner sleeve along its longitudinal axis results in radial movement of said inner sleeve in said outer sleeve, a die member mounted on said inner sleeve, means mounting said die member on said inner sleeve, means whereby said die member is maintained in fixed angular relationship with respect to said supporting structure but permitting its bodily movement in an orbital path about the rotational axis of said outer sleeve, and adjustable stop means between said inner and outer sleeves for limiting the radial movement of said inner sleeve with respect to said outer sleeve, and resilient means acting between said outer and inner sleeves to normally bias said die member in a central position on the axis of rotation of said outer sleeve, and a second die member arranged to coact with said first die member, said second die member being mounted in fixed angular relationship to said supporting structure.

13. In a forming machine of the character described, a stationary supporting structure, a first assembly comprising: an outer power driven sleeve rotatably mounted on said structure, an inner driven sleeve mounted for movement in said outer sleeve in its longitudinal direction and in a radial direction with respect to said outer sleeve and for simultaneous rotation therewith, cooperating cam means between said inner and outer sleeves whereby an application of force to said inner sleeve along its longitudinal axis results in radial movement of said inner sleeve in said outer sleeve, a die member having a spiral screw thread die face mounted on said inner sleeve, means mounting said die member on said inner sleeve means whereby said die member is maintained in xed angular relationship with respect to said supporting structure but permitting its bodily movement in an orbital path about the rotational axis of said outer sleeve, adjustable stop means between said inner and outer sleeves for limiting the radial movement of said inner sleeve with respect to said outer sleeve; a second assembly movable relative to said first assembly and axially aligned therewith, said second assembly comprising a second die member having a cooperating spiral screw thread die face positionable to encircle said first die member, means mounting said second die member and movable into engagement with said inner sleeve to move the same radially with respect to said outer sleeve, adjustable means for adjustably positioning said second die member on the last mentioned means whereby the screw threads on said rst and second die members may be matched, said second die member being mounted in iixed angular relationship with respect to said supporting structure.

14. In a die forming machine of the character described, a stationary supporting structure, a iirst power driven sleeve rotatably mounted on said supporting structure, a second sleeve movable longitudinally with respect to said rst sleeve and mounted for simultaneous rotation therewith, said first and second sleeves extending generally coaxially, a die member mounted on said second sleeve, said die member extending generally along the axis of said second sleeve, means whereby said die member is maintained in xed angular relationship with respect to said supporting structure but yet is free to move to different eccentric positions with respect to the rotational axis of said first sleeve, cooperating cam means acting between said first and second sleeves whereby an application of force to said second sleeve results in both longitudinal and radial movement of said second sleeve with respect to said first sleeve to thereby move said die member to diiferent eccentric positions with respect to the rotational axis of said first sleeve, abutment means acting between said rst and second sleeves for limiting the longitudinal movement of said second sleeve whereby the eccentric position of said die member may be adjusted, and a second die member arranged to coact with said iirst die member, said second die member being mounted in iixed angular relationship to said supporting structure.

15. In a die forming machine of the character described, a stationary supporting structure, a first power driven sleeve rotatably mounted on said structure, a second sleeve movable longitudinally and radially with respect to said first sleeve for simultaneous rotation therewith, said first and second sleeves extending generally c0- axially, a die member mounted on said second sleeve, said die member extending generally along the axis of said second sleeve, means mounting said die member on said second sleeve, means whereby said die member is maintained in fixed angular relationship with respect to said supporting structure but yet is free to move to different eccentric positions with respect to the rotational axis of said first sleeve, cooperating cam means acting between said rst and second sleeves whereby an application of force to said second sleeve results in both longitudinal and radial movement of said second sleeve with respect to said first sleeve to thereby move said die member to different eccentric positions with respect to the rotational axis of said iirst sleeve, abutment means acting between said rst and second sleeves for limiting the longitudinal movement of said second sleeve whereby the eccentric position of said die member may be adjusted, resilient means acting between said outer and inner sleeves to normally bias said die member in a central position on the axis of rotation of said first sleeve, and a second die member arranged to coact with said rst die member, said second die member being mounted in xed angular relationship to said supporting structure.

HIRAM R. CI-IEEK.

References Cited in the file of this patent UNITED 4STATES PATENTS Number Name Date 766,227 Doolittle Aug. 2, 1904 931,043 Davis Aug. 17, 1909 1,010,740 Douglas Dec. 5, 1911 1,771,534 Garrard July 29, 1930 2,005,215 Batie June 18, 1935 2,145,587 Draper Jan. 31, 1939 2,215,731 Williams et al. Sept. 24, 1940 2,215,845 Williams Sept. 24, 1940 2,372,011 Remington Mar. 20, 1945 FOREIGN PATENTS Number Country f Date 44,451 Germany Sept. 5, 1888

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