US1293231A - Multiple-arbor draw-press. - Google Patents

Description

H. A. STAPLES.

MULTIPLE ARBOR DRAW PRESS.

APPLICATION FILED JUNE I? Patented Feb. 4, 1919.

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APPLICATION FILED JUNE 17, 1918.

Patented Feb. 4, 1919.

3 SHEETS-SHEET 2.

ATTORN EY H. A. STAPLES.

MULTIPLE ARBOR DRAW PRESS.

APPLICATION FILED JUNE I?. 191B.

1,293,28L e l Peteneed Feb. 4,1919.

3 SHEETS-SHEET 3- INvENToR www ATToRNEY HORACE A. STAPLES, F BRIDGEPORT, CONNECTICUT.

i MULTIPLE-ARIEGE DRAWhPRESS.

To all whom t may concern v Be it known that I, HORACE A. STAPLES, a

' citi-zen of the United States, residing at 1052 2, looking in the direction ofthe Fig. 6 a fragmentary `plan view, partly y the line 10-10 in `the type of l rapid iire guns,

Laurel Ave., Bridgeport, county of Fairfield, State of Connecticut, have invented an Improvement in Multiple-Arbor Draw- Presses, of which the following is aspecification.

This invention relates more especially to presses used in the production of either hot or cold drawn seamless tubing, as inthe manufacture of cartridge shells for and the invention has for its objects to simplify, erally improve the construction and operation of this ,class of presses and to greatly increase their production.

With these and other objects in view, I have devised the novel multiple arbor draw press' which I will now describe referring to the accompanying drawings forming apart of this specification and using' reference characters to indicate the several parts. Figure 1 is a plan view of my novel press, partly broken away, the arbors being in the normal or retracted position;

Fig. 2 a side elevation partly 'broken away, corresponding with Fig. 1;

Fig. 3al plan view showing the drawing mechanism only, the arbors being at the extreme. of their forward movement; t

Fig. 4 a section; on an enlarged scale, on the line 4-4 in Fig. 2 lookingin the direction of the arrows, illustratlng lmeans forcausing the arborto'escillate; A

Fig. 5 a section -on'the line 5`-5in Fig.

arrows;

broken away, on a still larger vscale showing the arbor head and the -inner ends of the arbors and illustrating various details of construction;

Fig. 7 a section on the line .7 7 in Fig. 6;

I4 ig. 8 a detail sectional'view corresponding with Fig. 4, but'illustrating a modification in which the arbor head iscaused to rotate instead of oscillate;

Fig.` 9 a modificationl in which the arb-orV hea is caused to reciproca-te; -Y

Fig 10 a section, on an enlarged scale,'on

Fig. 9, looking in the .direction of the arrows, and

Fig. l1 is a section on the line 11,'-11 in Specication of Letters Patent.

-ent instance, is t cheapen and to genfragmentary plan view, corre-` sponding with Fig.- 1, but illustratin a` A Patented Feb. 4, 1919.

Application led June 17, 1918. Serial No. 240,397.

Fig. 10, looking in the direction of the arrows.

20 denotes the plunger which, in the prese piston rod of a hydraulic ram. It 1s unimportant, however, so far as the present invention is concerned, by what power the plunger is operated. 21 denotes the cylinder of the ram at the forward end of which is a frame block 22 provided with a stuffing box 23 through which the plunger passes. 24, 25 and 26 denote guide bars which are engaged by flanges 27 and 28, and a key 29 upon a carriage 30. At the forward end of the guide bars is a frame block 31. Frame blocks 22 and 31f are rigidly connected by tie rods 32 which extend longitudi-l nally through the guide bars, are threaded at their ends and are engaged by'nuts- 33.

The cylinder of the ram, guide bars 24 and 25 and frameblocks 22 and 31 rest upon suitable legs or supports, indicated by 34. 35 denotes a tie rod extending between ' frame blocks 22 and 31 which also serves as a stationary shaft. 39 denotes the arbors which are carried by an arbor head 40 which has motion in a plane transverse to the plunger. t

InV the present instance the movement is an oscillation in an arc of 180. The arbor head is provided with a hub 44 which has a bearing in a sleeve 43, itself seated in the carriage and retained in place by a ring nut 45 engaging the end of the hub. 36 denotes a tubular shaft which is mounted to turn upon tie rod or shaft 35. The arbor head is'V secured to the tubular shaft by means of# keys 41 which engage grooves 42 in the shaft. At the inner end of the tubular shaft is a pinion 37'which is engaged by a rack v 8 to lmpart oscillatory movement to said shaft and the arbor head. In addition to its oscillatory movement with the tubular shaft, the arbor head has longitudinal movement relatively to said shaft, as will be more fully explained.

The arbors are shown as provided with heads 47 which are socketed in the rear face of the head and retained in place by pins 46. The heads of the arbors are concentric with beveledrecesses 48 which are adapted to receive .and center the end f the plunger which, it will be noted, bears both on the arbor and on the arbor head. In addition to these points of bearing the plunger is provided with a collar 49 which bears against the carriage. ln order to retain the dit arbor head rigidly in place relatively to the carriage so that they must move longitudinally together and to prevent any side strain on the arbor head when subjected to the stress of the plunger, I provide the carriage with a recess 75 which receives the arbor carrying portion of the arbor head, the thrust of the plunger being taken up by an overhang 59 against which the forward end of the arbor head bears, the idea being to insure a structure that will fully take up the` side strain resulting from the use of a movable arbor head. It will be obvious that when the end of the plunger is seated in one of the recesses, the arbor head will be locked against rotation. The plunger must, therefore, be connected to the carriage in such a manner as to permit limited independent movement of the plunger, that is suicient to permit the latter to be withdrawn from the beveled recess and thus release the arbor head before the carriage is picked up. I provide the plunger with a reduced portion 50 and provide a split block 51 of less width than said reduced portion through which the plunger passes freely. This block is seated in the carriage, the parts thereof being locked in place by set screws 52. 53 denotes the die, with which the arbors cooperate in turn and which is seated in frame block 31 in alinement With the plunger, see Fig. 1. In order to relieve the arbors from strain and prevent. the possib-ility of buckling, I provide a guide block 5s through which the arbors pass and in which they may have reciprocatory movement. The guide block is keyed to the tubular shaft, see Fig. 5, and rotates therewith and may also have longitudinal movement thereon. The guide block is connected to the arbor head by distance rods 55 which are rigidly connected to the guide block and slide freely through lugs 56 on the arbor head. These distance rods are provided with heads 57 on the rear side of the lugs. Springs 58 may or may not be interposed between the heads and the-lugs.

As already stated the movement of the arbor head is not necessarily an oscillatory movement, although I have illustrated that in the present instance as a preferred form. Turning now to Fig. 4, it will be noted that pinion 37 on the tubular shaft is engaged by a rack 38. It is not important, so far as the principle of the invention is concerned, how this track is reciprocated. In the present instance I have shown the rack as a continuation of the piston 60 of a small hydraulic ram, indicated as a whole by 61. The operation of this ram is so timed as to produce an actuation of the rack, which in turn produces a half rotation of the arbor head, the instant the latter reaches its retracted position, as in Fig. 1. In Fig. 8 I have illustrated a modification 1n which pinion 37 is engaged by a pinion 6:2 on a shaft 63 to Which intermittent rotary movement may be imparted in any convenient manner, each actuation of the shaft imparting a half rotation to the tubular shaft and arbor head.

In the form illustrated in Figs. 9, 10 and 11, the arbor head is caused to reciprocate transversely which necessitates changes in the details of construction. The tubular shaft and accompanying parts are dispensed with. The carriage 64 is provided with three keys 65 which engage grooves in guide bars 66. The arbors are carried by an arbor head 67 which is caused to reciprocate transversely to the plunger in a way 68 in the carriage. A stop block 69 secured to the carriage and engaging a groove 74 in the arbor head limits the movement of the arbor head in each direction. Means for reciprocating the arbor head is not shown as speci cally it forms no part of the present invention. The reduced portion 50 of the plunger is engaged by a split ring 7 2, seated in the carriage, which is held in place by a nut 73 engaging the carriage.

The operation is as follows: Fig. 3 shows the position of the parts at the end of the drawing operation, the drawn tube being indicated by dotted lines at 70. lVhile the drawing operation is proceeding, the operator places a tube or shell, indicated by dotted lines at 71, on the other arbor, it being understood of course that the blanks for this machine are partly drawn tubes. At the end of a drawing operation, z'. e. during the return movement of the plunger, arbor head, etc., the drawn blank is removed from the arbor by stripping mechanism, not shown as specifically' it forms no part ot' the present invention. So far as the principle of the invention is concerned it is immaterial whether the end of the plunger is withdrawn from the recess in the rbor head to unlock the latter, at the beginning or at the end of the backward movenient of the plunger. As shown in the drawing, the carriage, arbor head and arbors would be drawn backward through the engagement of the wall at the front end of reduced portion 50 of the plunger with split block 51. During the return movement the drawn tube will have been stripped from its arbor and the operator will have placed a tube or shell on the other arbor. The half rotation ot the arbor head now takes place and places the arbor carrying a partly drawn tube in position for the drawing operation, during which the operator will place another tube or shell on the empty arbor.

Having thus described my invention, I claim:

1; A multiple arbor draw press comprising a die, an arbor head, arbors carried thereby, a shaft by which the arbor head is Y ing a plunger, a die,

' motion in a transverse plane and havin ,30.

cillat'e on the tie rod 20 carried and on which the arborhead has longitudinal movement, a plunger adapted to actuate the arbor head, and means for imparting motion to the arbor head in a -plane transverse yto the axis of the plunger.

2. A multiple arbor draw press comprising a carriage, guide bars on which the'carriage has longitudinal movement, an arbor head-having a hub, a tubular shaft by which the arbor head iscarried and on which it has longitudinal movement,- a tie rod, said shaft being mounted to rotate on the rtie rod and the hub hav`ng a bearing in the head. c

" carriage, and means foractuating the arbor 3. A multiple arbor draw press compris' ing a plunger, a die, a carriage, a tie rod, and an arbor head which is mounted toosa hub havingl a bearing in the carriage.

4. A multiple arbor drawv press comprisan arborhead having motioiiin a transverse plane and having beveled recesses adapted to receive and center the plunger, and arbors seated in the arbor head in alinement with the recesses. '5. A' multiple arbor draw press comprising a plunger, and an arbor headl having arbors, and .recesses in line with the arbors which are adapted to be engaged by the plunger.

.6. A multiple arbor draw press comprising guide bars, a carriage adapted to reciprocate on the guide bars, a tie rod, a tubular shaft mounted to oscillate on the tie rod, an arbor head mounted to oscillate with the tubular shaft and having longitudinal moveand havinga hub which has a bearing vin the carriage, and a ,plunger riage.

7. A' multiple arbor draw press comprising guide bars, 'a'` carriage adapted to reciprocatev on the guide bars, a tie rod, a tubular shaft mounted to oscillate on Athe tie rod, an arbor head which oscillates withl the tubular shaft and has longitudinal movement thereon, said arbo'r head having a hub with a bearing in the carriage, a

plunger, anda connection between the plun- .gen and the ,carriage` that will permit i imited independent movement of the plunger. 8. A multiple arbor draw press comprising a reciprocating carriage, an oscillating shaft an arbor head which oscillates with the shaft, has longitudinal movement thereon and is provided with a hub having a bearing in the carriage, a plunger, and a connection between the plunger and the carriage that will permit independent movement of the plunger.

9. A multiple arbor draw press comprisand is provided with i ently of the carriage,

ging a reciprocating .with recesses,

ing a reciprocating carriage, shaft, an arbor head having a hub with a bearing in the carriage, and recesses, said arbor head oscillating with the shaft and having longitudinal movement thereon, a plunger having a reduced portion, and a split block of less width than the reduced portion through which the reduced portion passes and which is seated in the carriage, the engagement of the forward end of the plunger with a recess locking the arbor head against oscillation, and backward movement of the plunger before the carriage is picked upy leaving the arbor head unlocked.

10. A multiple arbor draw press comprising a reciprocating carriage, an oscillating shaft, an arbor head oscillating with the shaft and having longitudinal movement thereon, means for holding the arbor head against longitudinal movement independa plunger having a reduced portion, and a split block of less width than the reduced portion through which the reduced portion passes and which is seated in the carri-age, whereby limited movement o f the plunger independently of the carriage is permitted.

. 11. A multiple arbor draw press compriscarriage having a recess, an oscillating shaft and an arbor h ead which oscillates with the shaft, has longitudinal movement thereon and is adapted to an oscillating engage the recess in the carriage, for the pur-y pose set forth.

12. A multiple arbor draw press comprising a reciprocati and an overhang, an oscillating shaft, an arbor head which oscillates with the shaft, has longitudinal movement thereon and is adapted to engage the recess, and a plunger connected to the carriage and adapted to engage the arbor head to move the latter and the carriage longitudinally, the thrust of the plunger being taken up by the engagement of thearbor head with the overhang.

13. A multiple arbor draw press comprising a reciprocatin carriagehaving a recess, an oscillating sha aii arbor head which oscillates with the shaft, has longitudinal movement thereon and is adapted to engage the recess, a plunger, and a connection b etween the plunger and the carriage that will permit limited independent movement of the plunger, forthe purpose set forth.

14; A multiple arbor draw press comprismovement thereon, is adapted to engage the recess in the carriage and is itself provided a plunger which is adapted t omove the arbor head and carriage longitudinally and to engage a recess in the arbor head to lock the latter and the shaft against g carriage having a recess oscillation, and a connection between the plunger and the carriage that will permit limited movement of the plunger to release the arbor head.

15. A multiple arbor draw press comprising a reciprocating carriage, an oscillating shaft, an arbor head which oscillates with the shaft, and has longitudinal movement thereon, a connection between the arbor head and thel carriage which prevents independent reciprocatory movement of either, arbors carried by the arbor head, a guide block through which the arbors passy and which rotates with the shaft and has longitudinal movement thereon, and distance rods between the guide block and the arbor head.

16. A multiple arbor draw press compris* ing a reciprocating carriage, an oscillating shaft, an arbor head provided with lugs which oscillates with the shaft and has longitudinal movement thereon, means for preventing independent reciprocation of the arbor head and carriage, arbors carried by the arbor head, a guide block through which the arbors passand which rotates with the shaft and has longitudinal movement thereon, distance rods rigidly connected to the guide block, passing through the lugs on the arbor head and themselves provided with heads, and springs between the heads of the distance rods and the lugs on the arbor head. 17. A multiple arbor draw press comprising a carriage, an oscillating shaft, an arborv head which oscillates with the shaft and has longitudinal movement thereon, a plunger adapted to engage the arbor head and having a collar engaging the carriage, and a connection between the plunger and the carriage that will permit limited backward movement of the plunger.

. 18. A multiple arbor draw ress compris- 'mg a carriage, an oscillating s aft, an arbor head which oscillates with the shaft, has longitudinal movement thereon, and is provided with recesses, a plunger which actuates the arbor head and the carriage and locks the latter against oscillation by engagement with the recess, and a connection between the plunger and the carriage that will permit limited backward movement of the plunger to release the arbor head.

19. A multiple arbor draw press comprising a carriage, an oscillating shaft, an arbor head which oscillates with the shaft and has longitudinal movement thereon, arbors seated inthe arbor head, the latter having beveled recesses in alinement with the arbors, a plunger adapted to engage said recesses in alinement with the arbors and having a collar adapted to engage the carriage, and a connection between the plunger and the carriage that will permit limited backward movement of the plunger.

20.' A multiple arbor draw press comprisA ing a carriage, an oscillating shaft, an arbor head which oscillates with the shaft and has longitudinal movement thereon, arbors seated in the arbor head, a vplunger adapted to engage the arbor headv in alinement with an arbor, a connection between the plungerv and the carriage that will permit limited independent movement of the plunger,- and a connection between the arbor head and the carriage that will cause the latter to take up the thrust of the plunger.

In testimony whereof l affix my signature.

HORACE A. STAPLES.

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