US1056012A - Machine for forming metal cups. - Google Patents

Description

J. E. DOBSON. MACHINE FOR FORMING METAL CUPS.

APPLICATION FILED JUNE 4,1910.

Patented Mar. 18, 1913.

4 SHEETS-SHEET 1.

IIHHI INVENTOR hi1 A flow/141's,

8 Q JQ 6' W WITNESSES: $0; I I

J. E. DOBSON. MACHINE FOR FORMING METAL CUPS. v APPLICATION FILED JUNE-1, 1910. 1,056,012 Patented Mar. 18, 1913.

4 SHEETS-SHEET 2.

I'NVENTOR a J. E. DOBSON. MACHINE FOR FORMING METAL CUPS.

APPLICATION FILED JUNE 4,1910.

1,056,012, Patented Mar. 18, 1913.

4 SHBETS-SHEET 3.

/ INVENTOR WITNESSES:

H1 Mom/13a,

J. E. DOBSON. MACHINE FOR FORMING METAL CUPS.

APPLICATION FILED JUNE 4, 1910.

4 SHEETS-SHEET 4.

v INVENTOR WITNESSES:

By -I Nari/(112v,

Q a/mu, @writ wd JOHN E. DOBSON, OF NEW YORK, N. Y.,

ASSIGNOR T0 E. W. BLISS COMPANY, OF

BROOKLYN, NEW YORK, A CORPORATION OF WEST VIRGINIA.

MACHINE FOR FORMING METAL CUPS.

Application filed June 4;

To all whom it may concern:

Be it. known that I, JOHN E. Donsox, a citizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Machines for Forming Metal Cups, of which the following is a specification.

This invention relates to apparatus designed especially for forming elevator buckets, but adapted also for bending or shaping other sheet metal articles of similar cupped shape or of such shape as to be capable of being made by a like or analogous series of operations.

Elevator buckets of small size or those made of ductile metal can in some instances be drawn as seamless cups by means of ordinary drawing (lies. But for buckets of larger size or where the use of ductile metal is not suitable, it is necessary to seam the buckets, and in such case they are bent up from a previously stamped-out blank of sheet metal, and after being bent to shape the overlapping portions or seams are united by rivets or by. brazing as may be required. It is for such seamed buckets that the machine of the present invention has been especially designed.

The accompanying drawings showa-machine for forming elevator buckets orth e like constituting the preferred embodiment I of thisinvention.

- the metal. blank Figure 1 is a plan of themachine. FigiQ is a vertical transverse section thereof on the plane of the line 22 in; Fig. Fig. 3 is a. front elevation partly in section upon the line 3-3 in Fig. 1. Fig. 4. is a fragmentary transverse section on theplanes of the line 4-4 in Fig. 1. Fig; o 's an elevation viewed transversely of the machine and ih the same direction as in Fig. 2, showingthe mechanism for operating the vertically-moving folders. Fig. 6 is .a perspective vlew the completed on Fig. 8 is aside levationof the die and access'ory parts which directly act upon the sheet netal blank. Fig. 9 is a plan of the .parts shown in Fig. 8 including the lateral diesfor completing the ends'of the bucket. Figs. 10 and of one: of the lateral dies.

Specification of Letters IPatent.

.or bucket. Fig. 7 shows; rom :which this is fo rmed.

11 are front andside elevations:

Patented Mar. 18, 1913.

1910. Serial No. 565,004.

Referring to the drawings Fig. 6 shows the finished cup or bucket to be formed by the machine, and Fig. 7 shows the sheet metal blank from which it is to be made. This blank a which is destined to be bentupon approximately the dotted lines shown, consists of a portion 1) which will form the back 6 of the bucket, two wings a c which .will form the sides or ends 0 c ofthe bucket,

a projection d-which willform the curved front cl of the bucket, and marginal portions 0 to the wings which upon being turned over "form the flanges e e of the bucket.

The machine is designed 'to be fed by hand or otherwise with successive blanks a, to bend these into proper form for the bucket and to deliver the bent-up but not riveted bucket outof -the machine ready-to. be finished by punching the rivet holes and inserting and setting the rivets.

The several bending operations are per-' Fig. 9; a rear'bending die-B which is shown in side'elevation in Fig. 8 and in plan in Fig. 9; two opposite side folders C which "tire shownuin side elevation in Fig. 8 and p')lan in Fig. 9; and two side-forming dies -D which are shown in plan in Fig.9 and one of which is shown in side elevation in 10' and in front elevation in Fig. 11. eferring to Fig. 8 the blank a is set up in a vertical plane infront; of thedie B, being held in place by any suitable gages or stopsythe die then advances in the direction of the arro-Wand bends the blank into'the hollow f of the die B. -To insure that the "blank shallmotbecome displaced during this bending operation a spring-pressed elamping ad or cross-head E' is mounted within this ollow of the die Bso that upon the appg'oach of the die A the blank is gripped tightly between 'theflatter and this clamping ad aiid ednsequently as, the die A enters the .firinly inposition and drawn without displacement into the hollow f,"the pad E receding as the die A advances until when the die A has entered fully into the hollow f the formed by bending dies coniprising a former. 75 Y 'ollow of the die Bi'the blank is held blank has been set to theconforming outlines'of the die Av and the hollow f of the die B .8 shown by dotted line in Fig. 8 and the pad E has been forced back into a notch in the die B. .The clamping device E may e variously constructed, but as shown it has a cross-head mounted upon a rod hwhich is acted on by a spring to press it firmly forward. The operation performed on'the blank by the dies A and B as thus described turns the portion b of the blank into a horizontal position against the under part b of the-die A and. folds theportion at of the blank against the upper face d." of th'edie A. Thus the curved' bottom of the cup or bucket, being approximately the portion 7' between the dotted linesin Fig. '7, is conformed to the curved end portion of the die A.- The'operation thus described leaves the wings a 0 of the blank projecting to both sides in approximately horizontal direction. These wings are then folded up by the side folders C (1 which ascend from beneath and fold the wings against the ends 0' of thedie A. During this operation the side dies'D D are located so faraway from the dies A B on eitherside, that there is ample room for the, folding-up of the projecting wings 0 .0. As soon, however, as these wings have been thus folded up the dies D D move toward each other and thus approach the interven-.

ing dies A'B. The function of these dies is to force the .wingsc c of the blank against the end faces a of the die A. and to turn the marginal portions 6 e of the wings around the edge of the die and to overlap the portion d of the blank, to the positions shown at e e in Fig.;: 6 before the ap roaching dies D'D begin to. act upon t e side wings of the blank the side folders C' G descend by a rapid motionso as to get out of the way and enable the dies-D D. to act. These dies have each a hollowlc conforming to the 6nd portions of the die A and adapted to turnthe flanges e' e and flatten the wings a c against the die The operation just 7 described completes the forming of the cup or bucket. The dies D then recede, moving away from theintervemng dies A B,

and leaving the newly-formed cup upon ,and embracing the dieA and within the hollow of the die'B'. Thedie A then recedes, moving outfrom the interior *of the newly-formed cup, leaving thelatter held in r the hollow. of the die B. It might be retable F. The die B, which is preferably stationary, is shown as fastened to a bracket G fixedly attachedto the frame. The die A is fastened to a slide H which slides in ways H on the frame, and said slide is connected through any suitable adjustable connection I to a slide H shown as mounted upon the slide H, and sliding thereon when the parts H H are adjusted. This slide H is reciprocated by any suitable mechanism, preferably by cams. For this purpose it carries a roller I which is acted upon by a cam J upon a cam shaft K to force the slides H H forwardly in order to impart to the die A its worln'ng stroke. The slide H is prolonged to form an extension or yoke H which carries a roller m which is acted upon by a cam J to impart to'the slides H their rearward movement to retract the die-A. v I

For imparting to the vertically-moving folders C C their propermovements the followingdescribed mechanism is provided: These folders are carried upon a verticallyreciprocating frame L which slides in ways L upon a bracket Gr projecting downward from the main frame. The slide L carries a rackn which meshes-with a toothed sector 0, fixed upon a rock'shaft p on which is fixed an-arm 7) all as best shown in Figs. 2 and '5. To this arm 1) is jointed a connecting bar q, the' oppositeend of which is jointed to one arm of a, rock lever. r 'fulcrumed at r in v fixed hearings on the frame, while its upper arm connects with a slide or yoke. M best shown in Fig. 5 which carries opposite rollers s s which are engaged respectively by cams N and N also fixed on the shaft K. Thus the reciprocations imparted by the cams NN to the slide M are communicated through the intervening parts to the upri ht slide L carrying the folders C C. To ena le these folders to be adjusted to varying distances apart, either for adjusting to a nicety their folding connection with respect to the die A, or for enabling the machine to be adjusted for making cups of different sizes by .the use of correspondingly altered dies A, B

and D, the connection between the foldersC C and the slide L is made laterally adjustable i'jv the use of intermediate slides P P to which therespective folders are fixed and which are mounted in horizontal ways P formed on the slide L. For adjusting the slides P I simultaneously a horizontal screw A B they are mounted on slides Q Q sliding in ways Q. on the main frame and reciprocated by means of cranks R R. carried by re= volving shafts S S which revolve synchronously, the crank studs being connected to the slides by connecting rods R R which are adjustable in length by means of an intervening right and left screwRflwherebyto adjust the approach of the dies D D to the die A and whereby also to vary the location of the slides Q Q for changing the machine from one set of diesfor making one size of cups to another set for making a different size. I

The several moving parts thus described may be variously driven. In the construction shown the machine is arranged to be driven by a belt on fast-and-loose pulleys T, Fig. 1, whereby a driving shaft T is normally driven continuously. Loosely mounted on this shaft is a pinion T which is coupled to the shaft at intervals through the medium of any suitable clutch U. The pinion T meshes with a gear wheel K fixedly mounted on the shaft K so that whenever the pinion T is clutched to the driving shaft T the shaft K is driven. This shaft carries two miter gears t t, Fig. 1, which drive miter-gears t t on the shafts S S whereby the three shafts K, S and S from which all the dies and actuating parts are driven, are

revolved in unison. To each completerevo,

lution of these shafts the active dies and folders perform one cycle of movements sufficient to form one cup or bucket. It-is desirable that after performing these move.- mcnts the machine should sto automatically in order to give ample time or the operator to remove. the cup already formed and to place anew blank in proper positionin the machine. When this is done the operator by means of a starting lever V throws the clutch U into engagement and starts the machine which then turns through ohe complete revolution performing the necessary movements for bending this ,blank into a cup, and then automatically stops.

,The automatic stopping of the machine is performed by means of a stepping cam which may be carried on any one of the shafts K, S, S. It is shown as a cam \V carried uponv the shaft K. This cam, as shown in Fig. 4, has a single lug or tooth which at the end of its revolution passes beneath a, projectionu carried by a vertically movable slide X which slide is thus lifted by the cam tooth, and is connected beneath the table to a transverse shaft V through any suitable connection, such as arack and pinion, or

a slot and arm, as shown, whereby its lifting movement oscillates this shaft. Theshaft V is connected to a longitudinal shaft or slide Yin any suitable manner, as through a rack and'pinion or an arm V, (Fig. 3) such that upon such oscillation of the shaft V by the cam W the shaft Y shall be moved endwise in such direction as to release the clutch U and apply a brake to sto the machine. The shaft Y has a conicalljy reduced neck Y which acts as acam to rock levers Z Z. carrying the brake. shoes. These levershave adjustlng'screws o '2) which act against the neck Y .(Fig, 4) .to adjust the force with which the brake is applied. The starting lever V 'is applied upon the same shaft V and to start the machine this lever is moved to oscillate the shaft V in con: trary direction, and thereby impart the contrary movement to the sliding shaft Y to release the brake and reengage the clutch U. The clutch shown is an ordinary toggleaction friction clutch. The particular construction of the clutch is not illustrated in detail, such clutches being well understood,

and forming no novel part of this invention.

The clamping pad or cross-head E carried on the rod h as already described, may be operated in :either of two ways. Its spring 2' shown in Fig. 9 as reacting against the bracket 2" may be sufficiently stiff to not only clamp the blank against the die A with the requisite force, but may also have suf ficient stress to push the completed cup out of the hollow f of the die B as the die A is retracted, so as to releasethe cup. If.

however, the spring a is not sutliciently still to perform this latter function so that there would be liability that the completed cup might remain jammed fast in the hollow f the clamping pad E, may be made to perform the function of a knockout by connecting its rod h. to some suitable moving part so that it will forcibly expel and dislodge the completedcup. To this end a. suitable connection may be made with the slides H or H as by means of a rod and lever, the latter arranged tostrike the end of the rod h at a 'suitable point in the retracting movement of the die A.

It must not be inferred from the particularity with which I have described the details of construction of my machine that my invention is by any means limited to such details, since its construction maybe varied within wide limits according to the articular construction of cup or bucket or ike article which it is desired to form. The

plicable generally for bending up cupshaped or box-shaped articles of sheet metal or similar material, where the article to be formed-can be bentorfolded around a die or former and against four sides thereof.

What I claim is:- 1. A machine for forming round-bottomed sheet metal cups from flat blanks having lateral" wings, comprising a rounded forming die conforming approximately to the interior of the cup to be formed, folding means coacting withsaid forming" die to' wrap the blank around-the 0 posite side's thereof, independently moving folders adapted to subsequently fold the rojectin Wings of the blankagainst the en s of suc forming die, lateral dies hollowed to conform to the ends of saidforming die, and movable against such die to shape and flange the wings of :the blank, connected driving mechanism for operatingsaid parts in the described succession, startin means adapted to set in motion said driving means, and

stopping means adapted automaticallfy to stopZsaid driving means at the end 0 the cycle of operations for completing one cup.

2. A machinefor the purpose described,v

comprising a formin die, means for folding a blank around 1t, end folders, a slide carrying said folders, an oscillating shaft having a sector engaging rack teeth on said slide and having an arm, a cam shaft, a

moving said folders, means for reciprocating said slide, auxiliary slides mountedto slide laterally u on said reciprocating shde and carrying t e respective folders, and means for adjusting said auxiliary slides upon'said reciprocating slide to adjust the folders toward or from each other.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses. I

JOHN'E. DOBSQN.

Witnesses:

' FRED. C. FLADD, Cries, Emswon'rn.

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