US1985039A - Apparatus for forming smoothly rounded can bodies - Google Patents

Description

F. KRUEGER Dec. 18, 1 934,

Filed Jan. 9, 1955 5 Sheets-Sheet l Dec. 18, 1934. F. KRUEGER 1,985,039

APPARATUS FOR FORMING SMOOTHLY ROUNDED CAN BODIES Filed Jan. 9, 1953 s Sheets-Sheet 2 INVENTOR ammmf k W ATTORNEYS.

F. KRUEGER Dec. 18, 1934.

APPARATUS FOR FORMING SMOOTHLY ROUNDED CAN BODIES Filed Jan. 9, 1935 5 Sheets-Sheet 3 INVENTOR "fiw g a *Pn A'rroR BODIES, v

Dec. 18, 1934. F. KRUEGER APPARATUS FOR FORMING SMOOTHLY ROUNDED CAN Filed Jan. 9, 1953 5 Sheets-Sheet 5 INVENTOR Patented Dec. 18, 1934 APPARATUS FOR FORMING SMOOTHLY ED CAN BODIES ROUND Frank Krueger, Brooklyn, "N. Y., assignor to E. W. Bliss Company, Brooklyn, N. Y., a corporation of Delaware Application January 9, 1933, Serial No.

Claims. (Cl. 153-32) In my application Serial No. 628,339, filed Au- Fig. 11 is an elevation of gust 11, 1932, (patented October 17, 1933, No. Fig. 10. 1,930,662) I have set forth a method of smoothly Fig. 12 is a detailed elevation of the ejecting rounding can bodies to remove irregularities or means shown at the left in Fig. 4. flat portions therefrom by a circumferential roll- Figs. 5 to 12 inclusive are on the same soale'as ing of the body to impart successive and alter- Figs. 3 and 4. nate wave bending to its sheet metal wall, the al- Fig. 13 is an temate wave bends being carried beyond the elasthe wave rolling or tic limit of the metal. In said application I have on the same scale as also set forth an apparatus for accomplishing rection of arrow 13 therein. such wave bending, said apparatus comprising a shown in dotted lines in Fig. 3. single unit adapted to operate upon only one can The parts of the present machine correspondbody at a time. ing to those set forth in my aforesaid application The present invention provides an improved apwill first be identified. paratus for practicing the said method expedi- With respect to any one tiously and economically, by the provision of multhe machine, the inner roll tiple units operating simultaneously on a plurality ing inside the can body) is shown at 2 mounted of can bodies. The machine constituting the preon its shaft or mandrel 3, and the outer rolls are ferred embodiment of the invention is adapted shown at 4 and 5, being mounted on a movable for continuous operation, receiving a continuous carrying part whereby they move together toward stream of successive can bodies, applying them beor from the inner roll 2. tween the wave bending rollsor surfaces, effecting The can body B to be treated is received between the wave bending and subsequent milder rolling end guides 34, at its opposite ends, which serve for efiacing the residual wave bends and removto prevent its longitudinal displacement during ing the can body from between the rolling surthe operation of the wave bending rolls, and also faces and finally ejecting the successive bodies in the present construction are utilized as the thus treated from the machine. means for feeding the can body to and from the The machine in its preferred embodiment is working position. illustrated in the accompanying drawings, where- In the multiple machine these parts pertaining into a single unit are mounted on rotary carriers Fig. 1 is and caused to revolve around a fixed axis, which Fig. 2 is a longitudinal, vertical section. is' preferably horizontal. In the construction Fig. 3 is a transverse section on a larger scale shown this axis is constituted by a stationary than Fig. 2, the plane of the section being indishaft H which is supported on pedestals I, I pro- LJ cated by the line 33 in Fig. 2. jecting from a base or table J, which may be ele- Fig. 4 is a vertical transverse section on the vated on legs K, K. In fixed relation with the same scale as Fig. 3, the plane of the section beshaft are two stationary cams L and M. The ing indicated on the line H in Fig. 2. cam L is a grooved disk fixed to a stationary gear Fig. 5 is a fragmentary longitudinal section il- N, which is keyed to the shaft. Around its pelustrating the means for feeding the can bodies to riphery, in mesh with its teeth are planet pinions or from the wave bending position, the plane of a, a, which are fixed on the ends of the inner the section being on the line 5-5 in Figs. 3 and 4. spindles 3, 3 of the respective units. In the ma- Fig. 6 is a fragmentary longitudinal section of chine illustrated there are eight of these units. the means for advancing the wave bending rolls, The eight spindles 3, 3 are carried in bearings the plane of the section being on the line 6-6 in b, b, fastened to a revolving carrier P, which Figs. 3 and 4. is mounted to turn freely on the shaft H. The Fig. '7 is an elevation of the movable parts carrier P is fixedly connectedto a carrier Q in the shown in Fig. 6, viewed in the direction of the arform of a hollow shell having its hub c mounted row '1 therein. to turn freely on the shaft H. For driving the Fig.8isasimilar elevation of such parts, viewed carriers Q and P, a gear wheel 11 fixed on the in the direction of arrow 8 in Fig. 6. hub c is engaged by a pinion c on a driving shaft Fig. 9 is a fragmentary'view, being a section on f, on which, outside the bearing 1', is a pulley g the line 9-9 in Fig. 6. or other means of applying power, controlled by Fig. 10 is a sectional detail of Fig. 5, the parts a lever g which may apply a clutch. The fixed being in the wave bending position. connection between the carriers P and Q is best the parts shown in elevation of the cam for operating. roll advancing toggles, being Fig. 2 and looking in the di- The same cam is of the multiple units of (i. e., the roll operata perspective view of the machine.

shown in Fig. 5. The carrier Q is shown as formed of an end disk It and a cylindrical shell 2' which is contracted to the dimensions of a smaller shell 7 having an intermittent flange which is bolted by bolts k to a flange on the carrier P, as shown. The outer shell 2' encloses within it the stationary drum cam M, to be described.

The carrier P carries the wave forming rolls 2, 4, 5, while the carrier Q carries the means for feeding the can bodies to the rolls, guiding them during the wave rolling operation and removing them therefrom pre nary to their being ejected from the machine.

For the mounting of the movable rolls 4, 5 of the respective units, the carrier P is formed on its opposite ends with radial slots or slideways m, m, best shown in Figs. 4 and 6, in which move slides 12, 12, best shown in Figs. 4, 6, 7 and 8. The rolls 4, 5 are shown as tubular rolls having roller bearing mountings on pins 0. The two pins 0, of each unit are fastened at their opposite ends in the two slides 12, n of that unit, as best shown in Figs. 6, 7 and 8.

The two slides 11, n are moved radially outward and inward together. Their outward movement brings the rolls 4, into operative engagement with the inner roll 2 for performing the wave rolling operation, as best shown in Fig. 3 at the right hand and lower part of the figure; their inward movement carries the rolls away from the inner roll 2, as shown at the left and upper part in Fig. 3. These movements are imparted to the guides 11., n by toggle connections under control of the sinuous cam groove 1: of the cam L. This groove is traversed by rollers q, q carried on arms 1', t (one for each unit), each arm being mounted fixedly on one end of a rock shaft s having bearings in the carrier P. On this shaft are fixed two toggle arms t, t at opposite ends, jointed to toggle links u, u, as shown in Figs. 7 and 8, these links having pin connections with the slides .22, n. Thus, as the cam groove moves the rollers out or in, the spindles s are rocked and the toggles t, u, straightened or buckled to force the slides outward or draw them inward and thereby control the co-action of the wave forming rolls. For the adjustment of the toggles t, uwhereby to control the throw of the slides 12, n the roller carrying arm 1' is shown as provided with adjusting screws 1:, 1; (Figs. 7 and 9) which engage the side of the toggle arm t so that the angular relation of the lever arms r and t may be varied and thereby the toggles brought more or less nearly to their straight relation in the active positions of the rolls 4, 5.

The can body guides 34, 35 of each unit are carried on sliding rods w, 11:, best shown in Figs. 3 and 5, which rods are mounted in pairs with a crosshead y connecting them which carries a roller .2 which rolls in the cam groove 112 of the drum cam M. ,Each rod is prolonged at w. The pairs of rods w slide through guiding holes 113 formed in bosses 114 on the shell of the rotary carrier Q; and their portions to slide through bores 115, formed in bosses on the right hand end of the shell portion 1' and in the end disk h where these members of the carrier Q join, as shown at the right in Figs. 2 and 5.

As the carriers P and Q revolve they carry the rollers q and 2 around in the grooves of the respective cams L and M. The groove 112 in the cam M, acting on the rollers 2 moves the rods w and the can body guides 34, 35 carried by them for carrying the fed in can bodies into working position between the wave bending rolls resacse 2, 4, 5; and subsequently at the end of the wave bending operation the cam groove 112 imparts a return movement to these rods and guides whereby the treated can body is fed out from between the rolls 2, 4, 5 into position for feeding out from the machine.

For feeding the can bodies to be treated into the machine, they are delivered by any suitable known can body handling means into a chute 0r reservoir R, which is shown in Fig. 1 as mounted in stationary and preferably inclined position at the upper part of the machine. The can bodies B, B descend through this feeding chute, the lowermost one dropping to the position shown in Fig. 3, where it is arrested by any suitable part, this function being conveniently performed by the hubs 116, 117, on which are mounted the guides 34, 35, which have concave faces 119 to receive the can body. The rotary carriers turn in the direction of the arrows a." in Figs. 1, 3 and 4. During this rotation the can bodies are carried around circumferentially from the entering position under the chute R to a delivering position, where they are dropped into a delivery chute S having an inclined bottom 118, down which they roll and are discharged out from the machine.

As each can body is delivered into the machine at the foot of the chute R it enters through the rotation of the carriers between the two can body guides 34 and 35 which are aligned with its opposite ends, as shown in Fig. 2. These guides are relatively adjustable to adapt them to the length of the particular can body to be treated, and are made slightly self-adjusting by the yielding of a spring 120 (Fig. 11) tending to draw them together, with a screw pin 121 for limiting their approach, these parts being applied to the hubs 116, 117, one of which is keyed on the rod w. and the other has a sliding connection with a spline 122 (Fig. 10) to prevent rotative displacement. The movable guide 34 has a lug 123 which is engaged by a projection 124 (Figs. 5 and 10) forming an abutment stop so that in the retracted or feeding-in position the lug abuts the projection and *is thereby stopped to hold the guides 34, 35 sufliciently apart to permit the can bodies to fall freely in between them. The same condition occurs in the feeding out position, so that the treated can body may freely drop out from between the guides.

Theguides 34, 35 for each can body are preferably divided into two sections, as shown best in Fig. 3, each section being mounted on its own rod to so that by the simultaneous movement of the twin rods the two sections move as one.

They are shaped, as best shown at the top of Fig. 3, to engage the end of the can body B, while the open space between them is sufliciently large to keep them free from the internal roll 2 when the guides are advanced to feed the can body onto this roll. To hold the respective guide sections in their proper angular positions each is keyed, splined, or otherwise non-rotatively mounted (as above described) on its rod to, and the two rods are keyed or otherwise nonrotatively engaged with their common head .1].

Shortly after each can body is received between the guides 34, 35,.these guides are advanced by the operation of,the cam groove 112, whereby the body is displaced endwise for a distance exceeding its length and carried onto the internal roll 2 and between this and the external rolls 4 and 5. This movement is completed about the time the-can body reaches the position shown at B in Fig. 3. Shortly after feeding the can body thus over the inner roll the outer rolls are advanced in the manner already described through the action of the cam L to bring these rolls into working engagement with the inner roll 2, as shown at the right in position 3 in Fig. 3. position B and to a point between the positions B and B the wave bending operation of the respective rolls is performed; that is to say, the external rolls force the sheet metal of the can body against the yielding surface of the internal roll with sufficient pressure tocause the sheet metal to penetrate into the cushion formed by the yielding surface portion of the internal roll, thereby forming two concave wave portions in the sheet metal with an intervening convex wave portion, as shown in Fig. 3 at positions B and B. Since the internal roll is revolving, it carries the .can body around with it so that this wave bending action progresses circumferentially around the can body; and this is performed for one or .more revolutions, sufficient to accomplish the requisite wave bending operation in the manner described in the pending application hereinabove referred to. When a sufllcient duration of wave bending has thus been performed the external rolls 4', 5 are moved back slightly so that they no longer force the sheet metal of the can body to penetrate the cushioning surface of the internal roll, this being the condition shown at B and 13 in Fig. 3. In this position of the external rolls their pressure against the can body and internal roll is just sufficient to roll out any residual waves that may be left in the can body at the termination of the wave bending operation; thereby smoothly rounding the can body and bringing it into its final perfected form, ready for delivery out from the machine.

For ejecting the treated can bodies after the return movement of the guides 34, has .fed them out from between the respective rolls, to insure their falling in correct time into the delivery chute S, a series of ejecting levers T are provided, one for each unit. These levers are pivoted, as shown in Fig. 4, on the rods w, and are formed with two arms, the one carrying a pin 130, and the other projecting outwardly so as in the ejecting position to encounter a roller cam 131 (Fig. 4) whereby the lever is rocked so that its pin 130 which projects between the can body B and the inner shell 1' exerts an outward thrust against the can body, thereby throwing it into the chute S. The levers T, T are retract-ed by springs 132, shown in Figs. 4 and 12. In their retracted position the pins extend inward closely adjacent to the inner shell 7' where they lie slightly beyond the feeding-in position of the entering can bodies.

For the proper support of the infeeding chute R and the outfeeding chute S, a fixed frame U is provided, shown as in the form of an arch, with its feet bolted to the base J. This frame carries adjustable rods 135, 135, on which are adjustably fastened the side walls 136 of the chute R, which also has guide strips 137 adjustably fastened within these walls, the construction thus-being such as to admit of the chute R being varied in dimensions for any size can body to be treated. To prevent any possible misplacement of the can bodies in a rapidly moving machine, a guard plate 140 is provided in the position shown in Figs. 2 and 3, being conveniently supported by bolting to a rod 141 clamped by a set screw 142 to a collar While moving past the- 143 which is fastened by setv screws on one of the rods 135.

The delivery chute S issupported by being provided with brackets 145 (Fig. 1) adiustably fas tened by bolts to the foot portion "of the frame U. An apron V is desirably provided beneath the units in their activepositions, as shown in Figs. 1. 2 and 3, being supported by a bracket 146 bolted adjustably to the base J.

The multiple unit machine thus described is capable of continuous operation at a high rate of speed, receiving the can bodies continuously from the feed chute and ejecting them in rapid succession for delivery through the outgoing chute. The method performed by the machine is precisely that set forth in the aforesaid application, Serial No. 628,339, and the rolls or rollers for performing the wave bending may be of any of the kinds therein described. The only essential is that in their rotary progress the respective internal and external rolls move together into operative relation, the preferable way of accomplishing this being to mount the internal rolls on spindles in fixed bearings relative to the carrier P and to make the spindles carrying the external rolls radially movable during the angular progression of the units due to the rotation of their carriers. The arrangement of the bending rolls with their axes parallel on an essentially drumshaped carrier as herein shown is the preferable arrangement. It will be understood that the combination of the wave rolling units into a multiple unit machine as herein shown and described is capable of variation in arrangement and in structural details and in mechanical expedients for communicating motion to the parts, all within the scope of the discretion of the engineering designer.

While the machine as herein described is for the treatment of can bodies, it is to be remarked that such bodies are essentially sheet metal tubes, the machine being applicable to the rounding and the truing of other such tubes or similar sheet metal articles, it being understood that any forms of tubular sheet metal articles are included in the term can bodies" as herein used.

I claim:

1. A machine for treating can bodies comprising a plurality of units each consisting of internal and external wave-bending rolls, for engaging the sheet metal body between them, with means for rotating them to act circumferentially on the body, with rotative carrying means for such units, and means comprising opposite guides engaging the body between them, movable to feed successive bodies between the rolls for treatment and to remove the treated bodies from between the rolls.

2. A machine according to claim 1, with a stationary cam, and means moving with the units, engaged by said cam and actuating said feeding means.

3. A machine according to claim 1, the said guides relatively movable, with means for separating them in the feeding in or out positions and closing them together to embrace the body in the intermediate positions.

4. A machine according to claim 1, one of said guides movable toward or from the other, a spring drawing them together, and a fixed abutment engaging such movable guide to separate the guides to free the body.

5. A machine according to claim 1, said guides having carrying means sliding parallel with the 4- meaoaa roll axes for pushing the bodies into working position.

6. A machine for forming smoothly rounded can bodies comprising a plurality of units each consisting of internal and external revolving wave-bending rolls, adapted to receive the sheet metal body between them and to roll the body circumferentially under pressure suflicient to flex it and stress it beyond its elastic limit, with means for driving the rolls, and means for introducing the bodies between the rolls of successive units for treatment by displacing them for their entire length and for removing the treated bodies by oppositely displacing them beyond the rolls, the means for introducing the bodies between the rolls comprising guides and carrying means therefor sliding parallel with the roll axes for pushing the bodies into working position, said carrying means for each unit having a roller, and a stationary cam engaging said rollers for imparting longitudinal movements to said carrying means.

7. A machine for forming smoothly rounded can bodies comprising a plurality of units each consisting of internal and external revolving wave-bending rolls, adapted to receive the sheet metal body between them and to roll the body circumferentially under pressure sufficient to flex it and stress it beyond its elastic limit, with means for driving the rolls, and means for introducing the bodies between the rolls of successive units for treatment by displacing them for their entire length and for removing the treated bodies by oppositely displacing them beyond the rolls, the internal and external rolls being relatively movable by means of movable carrying parts on which at least one of such rolls for each unit is mounted, and toggle means being provided to engage such carrying parts for imparting to them the respective movements, stationary actuating means being also provided to operate such toggle means for imparting said movements.

8. A machine for forming smoothly rounded can bodies comprising a plurality of units each consisting of internal and external revolving wave-bending rolls, adapted to receive the sheet metal body between them and to roll the body circumferentially under pressure sufficient to flex it and stress it beyond its elastic limit, with means fordriving the rolls, and means for introducing the bodies between the rolls of successive units for treatment by displacing them for their entire length and for removing the treated bodies by oppositely displacing them beyond the rolls, the machine having a stationary shaft, fixed frames supporting it, a carrying means for the units. rotatively mounted on said shaft and including a shell portion, reciprocating members for introducing the can body between the rolls, and a stationary cam fixedly mounted on said shaft for reciprocating said members, said shell portion forming a bearing support for said recipro'cating members and enclosing said stationary cam within it.

9. A machine for treating tubular canbodies with open ends for bringing them to smoothly rounded form, comprising a plurality of units, each consisting of an internal revolving roll and at least one external revolving roll adapted to receive the sheet metal body between them, and on being'forced together to roll the body circumferentially under pressure to flex and stretch it beyond its elastic limit, with means for driving the rolls, means for successively feeding the bodies between the rolls of successive units by displacing the bodies endwise in a direction parallel to the axes of the rolls for a distance equal to their entire length, means for thereafter forcing the rolls together to so roll the body between them, means for then separating the rolls, and means for feeding off the treated bodies by oppositely displacing them endwise to carry them beyond the rolls, the means for fee'ding'and removing the bodies comprising guide plates for acting against opposite ends of a body, and.

means for moving said plates in one direction for feeding on and in the opposite direction for feeding off, each such movement exceeding the length of the body.

10. A machine for treating tubular can bodies with open ends for bringing them to smoothly rounded form, comprising a plurality of units, each consisting of an internal revolving roll and at least one extemalrevolving roll adapted to receive the sheet metal body between them, and on being forced together to roll the body circumferentially under pressure to flex and stretch it beyond its elastic limit, with means for driving the rolls, means for successively feeding the bodies between the rolls of successive units by displacing the bodies endwise in a direction parallel to the axes of the rolls for a distance equal to their entire length, means for thereafter forcing the rolls together to so roll the body between them,

means for then separating the rolls, and means for feeding off the treated bodies by oppositely displacing them endwise to carry them beyond the rolls, the means for feeding and removing the bodies comprising guide plates for acting against opposite ends of a body, supporting means for each pair of guide plates comprising a slide carrying said plates, and means for successively moving said slides inone direction for feeding on bodies and in the opposite direction for feeding off.

FRANK KRUEGER.

Images