US1775732A

US1775732A - Spun-metal manufacture

Info

Publication number: US1775732A
Application number: US146365A
Authority: US
Inventors: Reynold G Nelson
Original assignee: SPUN STEEL CORP
Current assignee: SPUN STEEL Corp
Priority date: 1926-11-05
Filing date: 1926-11-05
Publication date: 1930-09-16
Anticipated expiration: 1947-09-16

Description

` Sept. 16, 1930. l R, G; NELSON 1,775,732

SPUN METAL MANUFACTURE Filed Nov. 5, 1926 5 Sheets-Sheet 2 e Hmmm JHIHIIM MMU Sept. 16, 1930.

Filed Nov. 5. 1926 5 Sheets-Sheet 3 El 14 i in MW Sept. 16, v1930. i R G, NELSON x 1,775,732

SPUN METAL MANUFACTURE Filed Nov. 5, 1926 5 Sheets-Sheet 4 fz. t Nmo/l 54M WM @Hoz ne ad sept. 16, 1930.l

' R. G. NELSON sPUH METAL MANUFACTURE Filed NOV. 5, 1926 s sheets-sheet 5 ik@ a Patented Sept. 16, 1930 l UNITED sTATEs PATENT `OFFICE REYNOLD G. NELSON, F CANTON, OHIO, ASSIGNOR 0F ONE-HALF T0 THE SPUN STEEL CORPORATION, OF CANTON, OHIO, A CORPORATION OF OHIO SPUN -METAL MANUFACTURE Application led November 5, 1.926. Serial No. 146,365.

m diators having filler tube inlets provided with internal threads at their ends for receiving an externally threaded radiator filler tube cap, and for appearance' and strength the filler tubes maybe externally grooved below 1r, the internally threaded ends.

In producing such radiator filler tubes having internally. threaded ends, it has been necessary to cutwith dies or other cutt1ng tools, the internal threads in theends there- :n of, and such internal thread cutting operations have been relatively expensive.

The principal. object of the present improveme'nts is to provide apparatus and methods for spinning internal threads upon the inside of tubular articles such as radi-= ator filler tubes; and a further object of the improvements is to provide an apparatus and method for spinning an internally threaded and externally grooved radiator tube during :zo a single continuous rotation of the improved spinning arbor of the improved apparatus.

These and ancillary-objects are attained in the lpresent improvements by a construction and arrangement which may be described in general terms as including in combination with a spinning apparatus which preferably may be of the type set l forth in my application for U. S. Letters Patent kfor metal spinning apparatus, Serial No. 134,432, filed September 9, 1926, an improved internal thread spinning arbor, improved double rotary spinning rolls, improved double trimming tools, improved means for inserting blank cups and the like on the arbor,A and improved filler 47 tube stripping means.

A preferred embodimentof the apparatus of the invention is illustrated in the accompanying drawings forming part hereof, in which 3U Figure 1 is a fragmentary plan view, with throughout the drawings.

portions in section of the improved metal spinning apparatus, the operations for s inning a filler tube as aforesaid having ]ust been completed and the apparatus being in readiness for the next trimming operatlon; y

Fig..2, a fragmentary front elevation of the same, portions being illustrated in seetion, and the tool holder and trimming mechanism being removed, and the apparatus being illustrated as just having had a blank ,cup inserted upon the improved internal thread spinning arbor by means of the tail-l stock provided with the improved cup inserting sleeve; Fig. 3, a fragmentary view similar to Fig. 2, illustrating the operation. of the improved filler tube stripping mechanism of the apparatus; l

Fig. 4a fragmentary view as online 4 4, Fig. l, illustrating the improved trimming mechanism, and braking mechanism for operating the 'improved arbor, in inoperative position, the s inning tools being removed for purposes o clearness of illustration; Fig. 5, a view similar to Fig. 4, the trimming tools havin been operated, and the arbor brake being in operative osition;

Fig. 6, a fragmentary enlarged) view'similar to Fig. 1, with portions in section illustratng more clearly the improved internal thread spinning arbor and other parts of the apparatus;

Fig. 7, perspective views of the improved thread rolLand the improved internal thread spinning arbor, the thread roll being removed from the arbor, after a filler tube has been spun and trimmed; and l Fig. 8, a perspective view of an internall threaded filler tube made by the use of the imroved apparatus` and methods herein set orth, together with a perspective view of the ller tube cap therefor about to be screwed therein. d y y "Similar numeralsv referto similar parts The 'mproved apparatus for spinning internally'threaded'radiator filler tubes and the like, may include the improved metal spinning apparatus indicated generally at k1 and as illustrated and described in my copending v application for U. S. Letters Patent,-Serial No. 134,432, and which improved apparatus includes a bed 2, having an improved spinning headstock 4 adjustably mounted in a well known manner at a desired longitudinal location thereon, and an improved tailstock 5 likewise adj ustably mounted upon the bed in a well known manner at a desired longitudinal i location adjacent the headstock.

Between the headstock and the tailstock a longitudinal feed carriage 6 is mounted in a well known manner for longitudinal movement between the headstock and the tailstock by rotation of the longitudinal feed carriage control wheel 7. A cross feed carriage 8 is for operative connection with a power shaft, 'not shown. At the spinning end 17 of the headstock the spindle shaft 15, which is preferably tubular, is provided with an inner taper for receiving and ittng with the tapered end 19 of the improved thread spinning arbor 20. K

The improved tailstock 5 is provided with a longitudinal aperture 37 axial with the arbor and spindle shaft, and in which aperture, screw 38 is slidably keyed as by a key 38, slidable in the keywa 38 of the screw, the screw extending towar s the headstock beyond the end 39 of the tailstock adjacent the headstock and there being a thread apertured hand .wheel 40 screwed upon the screw for abut- `ment with the end 39 of the tailstock, the hub 41 of the handle being provided with an annular roove 42 in whcih a tailstock hand wheel hnger 43 extends, the finger 43 being secured to the tailstock as by bolts 44, whereby the hand Wheelmay be rotated to move the screw towards or away from the arbor.

The foregoing construction and arrangement of the bed 2, the headstock 4, the tailstock 5, the longitudinal feed carriage 6, and the cross feed carriage 8, is all in accordance with the disclosure of my application for S. patent as aforesaid, Serial N o. 134,432.

The improved thread spinning arbor 20 having the tapered end 19 co-axial with and tightly fitting into the headstock spindle shaft 15, includes also co-axial with the headstock vspindle shaftl and with the tapered end 19, a stepped cylindric sleeve bearlng 21, and an K outwardly extending sleeve stop flange 22 is preferably provided' between the tapered end 19 and the stepped bearing 21.

Thestop Hange 22 is preferably cylindric and externally threaded as at 22', and a thrust nut 22 is screwed thereon, forming an outward extension of the sleeve stop flange, and

also providing means for removing the arbor from the spindle drive shaft, by unscrewing the nut to abut against the outer end of the spindle shaft.

A spinning form sleeve 23 is slidably mounted on the stepped sleeve bearing 21 and is provided with a pair of spaced outwardly extending sleeve flanges 24 and 24 forming an annular brake groove 25 for the sleeve.

Bushings

26 and 26 are preferably provided between the sleeve and the stepped sleeve bearing.

At its outer end the stepped sleeve bearing 21 terminates in a thread roll bearing 27 preferably of a diameter smaller than the diameter of the outer smaller section of the stepped sleeve bearing, and the outer thread roll bearing is provided with a plurality of axially extending radial driving keys 28 thereon, for receiving and fitting into the plurality of longitudinally extending internal radial driving keyways 29 in the thread roll 3() having its outer cylindric surfaces provided with external threads 31 of the proper shape for forming the desired internal threads in-the internally threaded filler tube.

For providing tapered necks for the filler tubes just below the internally threaded end, the sleeve 23 is provided with a tapered outer end 32, and for purposes hereinafter to be described in detail, a plurality of axially extending element grooves 33 are provided'in the outer surface of the tapered end 32 of the sleeve.

Upon the cylindric outer surface 34 of the sleeve between its tapered outer end 32 and the flange 24', a stlipping collar 35 is slidably mounted and provided with an external annular groove 36 which receives the upper bifurcated ends a and 45" of the vertically extending stripping fork 45 which is mounted at its lower end upon the'end adjacent.

the arbor of a horizontally extending stripper rod 46; and the rod 46`is slidably lnounted at its end'adjacent the tailstock in hangers 47 depending from a collar 48 secured upon the shaft 38 of the screw 38 adjacent the inner end thereof, and preferably abutting y the end 49 of the threads of the screw. A stop pin. 46 extends from the rod 46 between the hangers 47.

For providing convenient means' for inserting blank cups and the like upon the arbor,the Unthreaded shaft 38 of the screw 38/6Xten`ds toward the arbor beyond the collar 48, and formsa bearing for a cup inserting sleeve 50 slidably mounted thereon and provided with a handle 51 for moving the sleeve back and forth 'upon the shaft;`

and the shaft 38 terminates at its end adjacent the arbor,l in the rotatable clamping head 52.

Upon a stub shaft 53 preferably mounted therein and extending from the rear stud '13 and the cap 12, the improved trimming mechanism and spindle braking mechanism indicated generally at- 54 is operatively mounted, and includes a trimming tool supporting crank 55 pivot'ally-journalled atthe outerend of the stub shaft 53, and the crank carrying at its v,outer end a pair of spaced trimming tools,"preferably

rotary trimming tools

56 and 56. journalled upon a longitudinally extending trimming tool shaft57 secured in the outer end of the crank 55, and the cra-nk is further provided with a preferably upwardly extendinghandle 58 for pivoting the trimming tool up and down about the stub'shaft as an axis.

Adjacent the crank 55 on the stub shaft, a sleeve flange stop arm 59 is secured, and the outer end of the stop arm extends at the tailstock side of the sleeve iange 24 preventing longitudinal movement o f the sleeve 23 upon the sleeve bearing 21. l l The braking mechanism for selectively preventing the normal rotation of the sleeve 23 with the sleeve bearing21, includes the brake band 60 extending around the brake groove 25 of the sleeve 23 and secured at its outer ends upon the stub shaft 53 adjacent the stop 59, as by a screw 60'..

A brake rod 61 is mounted upon the cran 55 adjacent the trimming tools and extends longitudinally therefrom towards the head-- stock and over the brake band 60 whereby a downward pivoting of the crank 55 about the stub shaft 53 will eventually impinge the brake rod on top of the brake band and tighten the same labout the brake groove to stop the rotation-of the sleeve with the sleeve bearing for purposes hereinafter 'to be described in detail.

The turret tool holder 10 has mounted therein a laterally extending bracket 62 having a forked outer end which carries a preferably horizontal shaft 63 upon which are journalled preferably upon bearings of the ball or roller type, a pair of spaced rotary spinnino rolls 64 and 65, and the neck spinning roll 64 nearest the headstock preferably has the grooved peripheral contour; illustrated, and the thread spinning roll 65 neares't the tailstock preferably has a cylindric contour over the greater portion of its peripheral surface, and the eyllndric contour being tapered off adjacent the headstock edge of the roll as illustrated.

The apparatus thus described in detail maybe used for spinning internally threaded .radiator filler tubes and the like, such as the filler tubel 66, illustrated in' Fig. 8 together with. the filler tube cap 67- therefor, by operating the a paratus as follows:

The spindle sha and arbor are rotated at a speed which may be 2250 R. P. M. A previously formed cup 62 is then inserted in the cup inserting sleeve 50 extended as illustrated in Fig. 2, and the thread roll 30 having been inserted upon the thread roll bearing 27 of the'arbor 20 for being driven thereby through the keys 28 fitting into the keyways 29 of the thread roll, the clamping head 52 at the end of the shaft 38 of the screw 38 is advanced by means of the hand wheel 4Q to clamp the disk end 62 of the cup against the outer end of the thread roll whereby the thread roll and the cup extending over the same is caused to rotate with the arbor.

The -sleeve 50 is then withdrawn as illustrated in Fig. 1, and by manipulation of the cross feed carriage control crank 9 and the longitudinal feed carriage control wheel 7 the cup is spun upon the longitudinally grooved and tapered sleeve 23 and the thread roll 30, by radial lpressures applied uponthe outer surface of the cup by the spaced spinning rolls .64 and 65 as they are longitudinally moved to and fro across the surface of the rotating cup. Y

In Fig. 1, the spaced rolls are illustrated in full lines in their extreme longitudinal position towards the tailstock and in dotted lines in their extreme longitudinal'position towards the headstock.

In Fig. 6, the spaced spinning rolls are illustrated in full lines in their extreme longitudinal position towards the headstock and in dotted lines in their extreme longitudinal position towards the tailstock.

As best illustrated in Fig. 6 the thread spinning roll 65 serves to radially press and flow the material of the cup into the outer grooves -of` the thread roll 30, whereby internal threads of the proper shape are formed in the end portion 68 of the cup over the threads of thev thread roll. The neck spinning roll 66 by its radial pressure and its longitudinal travel to and fro over the skirt ofthe cup serves to form a tapered neck 69 for the filler' tube upon the taperedsleeve 23, and longitudinally extending internal ridges 70 are formed upon the inside of the tapered neck by the-pressure of the spinning roll 64 against the material of the cup over the element grooves 33 in the tapered sleeve 23.

The peripheral surface of the thread roll 30 is preferably lunthreaded and cylindric adjacent its outer end, .whereby4 the disk endv 62" of the cup and the excess material at the end of the taperedneck may be simultaneously trimmed fromthe still rotating and now formed internally threaded filler tube by means of the properly longitudinally spaced and preferably

rotary trimming tools

56 and 56 pivotally swung on the crankv55 into cutting contact with the rotating filler tube capy by means of the lever 58 as best illustrated in Figs. 4 and 5.

The operator does not of course trim the formed fillerv tube as aforesaidv until after withdrawing the spinning rolls from contact with the rotating filler tube, and at the same time the trimming operation is performedl with one hand, the hand wheel 40 is turned to withdraw the clamping head 52 away from the arbor.

A further downward pivoting of the crank 55 about the stub shaft 53 eventually impinges the brake rod 61 upon the top of the brake band and tightens the same about the brake groove 25, whereby rotation of the sleeve`23 and the filler tube now formed thereon and keyed thereto by the ridges fitting in the grooves 33, is stopped, while the sleeve bearing 21 still rotates, driving the thread roll 30 with it through the keys 2K8 as aforesaid.

The stopping of the sleeve and the internally threaded filler tube upon the rotating sleeve bearing and thread roll causes the thread roll to screw out of the internally threaded filler tube and drop to be caught by the operator.

After the thread roll has been removed from the still rotating arbor, the crank 55 may be again elevated and the sleeve permitted to again rotate with the sleeve bearing, and the formed and trimmed filler tube may then be stripped from the sleeve by further movement of the screw 38 away from the headstock by turning the hand wheel 40, whereby the stop pin 46 in the rod 46 is caught by the hanger 47 adjacent the headstock causing the stripper rod 46 to be drawn away from the headstock carrying with it the upper ends 45a and 45b of the stripping fork 45, and thereby strippingthe filler tube from the sleeve and arbor and`causing it to drop therefrom, as best illustrated in Fig. 3. Y

As best illustrated in Fig. 7, the keyways 29 in the thread roll 30 are preferably flared, and provided with one preferably longitudinal driving face 29 for abutment with the driving face of one of the keys 28, and an opposite diverging curved face 29, whereby the keyway has a greater width at its headstock end than its tailstock end and thereby enabling the thread roll to be placed upon the thread roll bearing as it rotates with the spindle shaft, after which the aforesaid cycle of operations may berepeated and another internally threaded filler tube may be spun upon the continuously rotating arbor.

The cup 62 may be previously formed in a drawing press, or may itself be spun by the use of the spinning apparatus set forth in my prior applica-tion, Serial No. 134,432.

lVhen it is desired to vspin external threads and the like, upon a tubular material by the method herein set forth, that is, by applying pressure on one side of material having another side in abutment with thread impressions and the like, it is obvious that the arbor herein set forth may be modified for providing a hollow central portion for receiving the material, and the thread roll may extend around the material, and the spinning roll may press from the inside of the material against the same as it externally `abuts the internally threaded roll.

I claim:

l. The method of spinning threads and the like in tubular material and the like, which includes mounting the material upon an arbor having a circumferential surface fitting and contacting circumfercntially with a circumferential surface of the material, the said arbor surface having grooves as thread grooves thereon, clamping the material to the arbor, rotating together the arbor and the `material mounted thereon, and applying pressure upon a surface of the material opposite the surface contactingwith. the arbor.

2. The method of spinning ridges and grooves in tubular material and the like, which includes mounting the material upon an arbor having a circumferential surface fitting and contacting circumferentially with a circumferential surface of the material, the said arbor surface having ridges and grooves thereon, clamping the material to the arbor, rotating togetherthe arbor and the material mounted thereon, and applying pressure upon a rsurface of the material opposite the surface contacting with the arbor.

3. The method of spinning threads and the like in a circumferential surface of tubular material and the like, which includes mounting the material upon an arbor having a circumferential surface fitting and contacting circumferentially with the circumferential surface of the material, the said arbor surface having grooves as thread grooves thereon, rotating together the arbor and material mounted thereon, and applying roller pressure upon a surface of the material opposite the surface contacting with the arbor for flowing the material into the arbor thread grooves and for cylindrically forming said roller pressed surface. y

4. The method of spinning ridges and grooves in a circumferential surface of tubularmaterial and the like, which includes mounting the material upon an arbor having a circumferential surface fitting and contacting circumferentially with the circumferential surface of the material, the said arbor surface having ridges and grooves thereon, rotating together the arbor and material mounted thereon, and applying roller pressure upon a surface of the material opposite the surface contacting with the arbor for fiowing the material into the arbor grooves around-the ridges and for cylindrically forming said roller pressed surface. A

5. The method of spinning threads and the like in the inner surface of tubular material and the like, which includes mounting the material upon an arbor having an outer surface fitting and contacting circumferentially with the inner surface of the material, the said arbor surface having grooves as thread grooves thereon, clamping the material to the arbor, rotating together the arbor and the material mounted thereon, and applying pressure upon the outer surface of the material opposite the surface contacting With the arbor.

6. The -method of spinning ridges andV grooves in the inner surface'of tubular material and the like, which includes mounting the material upon an arbor having an outer surface fitting and contacting circumferentially with the inner surface of the material, the said arbor surface having ridges and grooves thereon, clamping the material to the arbor, rotating together the arbor and the material mounted thereon, andv applying pressure upon the outer surface of the material opposite the surface contacting with the arbor.

7. The method of s inning threads and the like in the inner sur ace of tubular material and the like, Which includes mounting the material upon an arbor'having an outer surface fitting and contacting circumferentially with the inner surface of the material, the said arbor surface having grooves as thread grooves thereon, rotating together the arbor and material mounted thereon, and applying roller pressure upon the outer surface of the material for flowing the material into the arbor thread grooves and for cylindrically forming the said material outer surface.

` 8. vThe method of spinning ridges and grooves in the inner surface of tubular material and the like, which includes mounting the material upon 'an arbor having an outer surface fitting and contacting circumferentially With the inner surface of the material,

the said arbor surface having ridges and grooves thereon, rotating together the arbor and material mounted thereon, and applying rollerpressure upon the outer surface of the material for iowing the material into the arbor grooves around the rid es and for cylindrically forming said Amaterial outer surface.

9. The method of simultaneously spinning threads and the like upon one portion of the inner surface of the tubular material and the like and spinning a neck adjacent the threaded portion of the tubular material, .which includes mounting thematerial upon an arbor having a circumferential surface fitting and contacting circumferentially with a circumferential surface of the material, the said arbor surface, having grooves as thread grooves thereon and a neck groove ad]acent the thread grooves, rotating the arbor andl thematerial mounted thereon, and simultaneously applyingpressure upon the 'outer surface of the ymaterial over the thread grooves and over the neck groove.

' 10. The method of simultaneously spinning ridges and grooves upon a portion of the inner surface of tubular material andthe like and spinning a neck adjacent the threaded portion of the tubular material, which includes mounting the material upon an arbor having a circumferential surface fitting and contacting circumferentially with a circumferential surface of the material, the said arbor surface having ridges and grooves thereon and a neck groove adjacent the ridges and grooves, rotating the arbor and the ma- 'l terial mounted. thereon, and simultaneously applying pressure upon the outer surface of the material over the ridges and grooves and over the neck groove.

11. Apparatus for simultaneously spinning threads and the like upon .one portion of the inner surface of tubular material and the like and spinning a neck adjacent the threaded portion of the tubular material,

which includes an arbor for mounting the material to be spun, the arbor having grooves as thread grooves thereon and a neck groove adjacent the thread grooves, means for rotating the arbor and the material mounted thereon, means for clamping the material to the arbor and means for simultaneouslyA applying pressure upon the outer surface of the material over the thread grooves and over the neck groove.

12. Apparatus for simultaneously spinning ridges and grooves upon a portion of the inner surface of tubular material and threaded portion of the tubular material,

.which includes an arbor for mounting the plying pressure upon the outer surface of,l

the material over the ridges and grooves and over the neck groove.

13. Apparatus for spinning ridges in tubular material and the like, which includes an arbor having grooves therein for fitting within and mounting material to be spun, means for clamping the material to the arbor, means' Ases lthe like and spinning avneck adjacent the Y for rotating the arbor and the 'material' mounted thereon, and means for applying pressure upon a surface of the material opposite the arbor grooves.

14. Apparatus for spinning ridges in the inner surface of tubular material and the the arbor and the material mounted thereon, and means for applying pressure upon the outer surface of the material opposite the arbor grooves.

15. Spinning apparatus including a rotatable arbor sleeve bearing, an arbor sleeve slidably mounted upon the bearing and normally rotatable therewith, and means for selectively stopping rotation of the sleeve with the rotating bearing.

16. Spinning apparatus including a rotatable arbor sleeve bearing, an arbor sleeve slidably mounted upon the bearing and normally rotatable therewith, and means for selectively stopping rotation of the sleeve with the rotating bearing, and a removable thread roll mounted upon the sleeve bearing. 17. Apparatus for spinning threads and the like in tubular material and the like, which includes an arbor, means for clamping material to the arbor, and associated means for forming threads and the like in tubular material mounted on the arbor,` and means for unscrewing the threaded material from the arbor.

18. Apparatus for spinning threads and the like in tubular material and the like,

which includesan arbor, a removable thread roll thereon, means for clamping material 25 on the arbor and the thread roll, means for forming threads and the like in the material mounted on the arbor and thread roll, means for simultaneously trimming the threaded material and unscrewing the thread roll therefrom, and means for stripping the threaded material from the arbor.

19. Apparatus for spinning threads and the like in tubular material and the like, which includes an arbor, a removable thread roll thereon, means for clamping material on the arbor and the thread roll, means for orming threads and the. likel in the material mounted on the arbor and thread roll, and means for simultaneously trimming the threaded material and unscrewing the thread roll therefrom.

20. Spinning apparatus including a rotatable arbor, means for mountingtubular material and the like on the arbor including a shaft separate from the arbor and alined therewith, and a slidable sleeve .on the shaft for selectively extending over the arbor.

In testimony that I claim the above, I have hereunto subscribed my nam'e.

REYNOLD e. NELSON..