US2037247A - Machine for beading bodies of sheet metal barrels - Google Patents

Description

April 14, 1936.

B. J. ILINDGREN MACHINE FOR BEADING BODIES OF SHEET METAL BARRELS Original Filed Dec. 21, 1952 '3 Sheets-Sheet 1 SN w April 14, 1936. B. J. LINDGREN MACHINE FOR BEADING BODIES OF SHEET METAL BARRELS Original Filed Dec.

21, 1932 5 Sheets-Sheet 2 RNN 3N NNN mww H 3.

April 14, 1936. B. J. LINDGREN MACHINE FOR BEADING BODIES OF SHEET METAL BARRELS Original Filed Dec. 21, 1932 3 Sheets-Sheet 3 Patented Apr. 14, 1936 UNITED STATES PATENT OFFICE MACHINE FOR BEADING BODIES OF SHEET METAL BARRELS Original application December 21, 1932, Serial No. 648,184, now Patent No. 2,004,816; dated June 11, 1935.

Divided and this application July 26, 1933, Serial No. 682,312

" 21 Claims. 01. 153-73) This invention relatesto a machine for forming circumferential beads on sheet .metal barrel drums, bodies or shells, and it is the object of this invention to provide an improved apparatus for performing this operation, as will be fully set forth hereinafter. This application is a division of an application filed December 21, 1932 and serially numbered 648,184. y

In the accompanying drawings:

Figure 1 is a plan view showing the bead expanding mechanism embodying my invention, and part of the conveyor mechanism associated therewith.

Figure 2 is a front elevation of the same.

Figure 3 is a. vertical longitudinal section of the bead expanding mechanism, taken on line 3-3 Fig. 1.

Figure 4 is a horizontal section of the bead expanding mechanism, taken on line 4-4 Fig. 3.

Figure 5 is a fragmentary vertical longitudinal section, on an enlarged scale, showing the telescopic portion of the piping whereby the pressure fluid is supplied to the hydraulic motor on one of the expander s1 iporting slides of the bead expanding mechanism.

Figure 6 is a vertical section taken on the correspondingly numbered line in Fig. 5.

Figure 7 is a vertical transverse section of the bead expanding mechanism, on an enlarged scale, together with the adjacent part of the drum conveyor mechanism, taken on line 1-1 Fig. 3.

Figures 8 and 9 are fragmentary vertical transverse sections taken on the correspondingly numbered lines in Fig. 3.

Figure 10 is a fragmentary longitudinal section, showing the connection between one of the expander follower rods and the piston rod of the motor which actuates the same.

Figure 11 is a fragmentary vertical transverse section, on an enlarged scale, taken on line I l-l I Fig. 3.

Figure 12 is a fragmentary vertical transverse section, taken on line i2-l2 Fig. 3, showing the drum resting on the saddle.

In the following description similar characters of reference indicate like parts in the several figures of the drawings:

Each of the barrel drums, or shells which is adapted to be operated upon by the mechanismthe purpose of forming thereon two laterally projecting circumferential beads I02 adjacent to opposite ends thereof, which beads are preferably spaced equal distances from the longitudinal center of the body, as shown in Fig. 3.

Preferably, though not necessarily, each of these beads is formed by two successive operations, the first of which serves to expand the metal circumferentially on a part of the cylindrical body of the barrel without appreciably stretching or thinning of the metal; while the second operation serves to roll this expanded metal so that a completed bead is formed on the body which projects a substantial distance laterally from'the side of the body and brings the two side walls of each head closer together and more nearly parallel to radial lines drawn from the axis of the barrel so that these beads will serve more effectively for bearing surfaces on which the barrel may be rolled while loaded with various contents, without liability of the beads breaking down or causing leakage.

These operations of preliminarily expanding a part of the body of the barrel and partially forming the beads and then rolling these expanded parts of the barrel body for the purpose of completing the formation of the beads without thinning the metal but instead insuring the fulleststrength of the same, form the subject of the Letters Patent No. 1,908,521 dated May 9, 1933, and reference may be had to the same for a more complete disclosure of this process.

The present application is based on the mechanism whereby expansion of the bead on the body of the barrel is effected.

The numeral I03 represents the main part of the stationary frame of this machine which may be of any suitable construction for the purpose of supporting the various working parts of the mechanism forming the subject of this application.

In its general organization this mechanism comprises an expanding mechanism whereby parts of the cylindrical body of the barrel are expanded in the process of forming the circumferential beads thereon, and a conveyor mechanism whereby the barrel bodies are fed through the machine and successively presented to the expanding mechanism and discharged therefrom.

This conveyor mechanism is arranged lengthwise of the machine while the expanding mechanism is arranged transversely of the longitudinal path of the. barrel drums as the latter progresses through the machine.

' Arranged lengthwise of the machine is a longitudinal track upon the front part of which the barrel bodies or drums are placed either manually by the operator or by mechanical means, into a position in which the axis of the body is arranged'horizontally and transversely relative to this track, and over which this body is conveyed while in this position, and presented to the bead expandingmechanism and ultimately discharged from the rear or delivery end of this track.

This track in the preferred organization comprises two longitudinal parallel rails I04, which are stationarily mounted on the main frame in any suitable manner, the rail members being arranged on opposite sides of the longitudinal centerof the track and spaced a suitable distance apart so as to support the sheet metal drums on their undersides adjacent to the flanges IIII at opposite ends thereof as the drums are moved from the front end of the track to the rear end thereof in their progress through the machine.

After a drum which is to be beaded has been placed upon the rails I Ill of the track, as shown in Fig. 7, the operator rolls this drum forwardly into a position in which the drum comes within the working range of the conveyor mechanism, which last-mentioned position is represented by the drum located at the left in Fig. 7. This position, for convenience of description, will be referred to as the first or receiving station No. 1. During the first step of the operation of the conveyor mechanism the drum is advanced toward the rear of the machine and remains temporarily at rest in a position which will be designated as the second station No. 2 preparatory to expanding the body of the barrel for producing the beads thereon.

During the third step of the conveyor mechanism the drum is taken from station No. 2 and may be advanced on the rails of the track to means which may perform other operations on the barrel body, and then the latter is ultimately discharged from the machine.

Any suitable conveyor mechanism may be employed for moving the barrel drums or bodies to and from the heading station on the tracks but the one shown in the drawings consists generally of longitudinally movable feed bars A arranged below the path of the barrel drums, feeding dogs B adapted to engage the rear side of the drums, and stop'dogs C adapted to arrest the forward movement of the drums. This conveyor mechanism is fully described in said patent application Serial No. 648,184 filed December 21, 1932 and reference may therefore be had to the same for a more detailed explanation as to its construction and operation.

After each drum arrives at the bead expanding mechanism, which is represented by station No. 2, the drum conveyor mechanism reaches the end of its forward stroke and the drum remains at rest during the following backward stroke of the conveyor mechanism, and during this period of rest, so far as the forward longitudinal movement of the drum is concerned, the same is lifted into a position in which its opposite ends are in alignment with the two sections of the expanding mechanism which are arranged on opposite sides of the path of the barrel drums or bodies and adapted to form beads circumferentially on the drum adjacent to opposite ends thereof.

This lifting mechanism cooperates with other parts so as to hold the barrel positively in its centered position with reference to the bead expanding mechanism, and as best shown in Figs. 1, 2, '1. and 12. is constructed as follows:

The numeral I 68 represents two longitudinal bars of a saddle which is adapted to raise the drum and each of which is provided on its upper side with a v-shaped seat I681; for engagement with the underside of the drum adjacent to one end thereof, so that when the seats of these two bars engage with the drum the latter will be centered with reference to this elevating mech anism and maintained in this position while being lifted. These saddle bars, during the forward stroke of the conveyor mechanism, are arranged below the path of the drums, as represented by dotted lines in Fig. 7; and after the conveyor mechanism reaches the-forward end of its stroke these saddle bars rise, and by engagement with the underside of the drum, lift the latter so that the same is axially in line with the elements of the plurality of bead expanding mechanisms which are adapted to form the beads on the drum, as shown by full lines in Figs. 3 and 7.

These saddle bars form part of a vertically movable lifting frame which comprises upright bars I69 connected at their upper ends with opposite ends of the saddle bars I68, horizontal transverse bars I10 connecting the lower ends of the corresponding upright bars I69, and a vertically movable slide I1I provided with laterally proiecting arms I12 which are connected with the intermediate parts of said transverse bars I10. The slide I" is guided in its vertical movements on a guide rod I14 depending from the adjacent part of the main frame I03. The cooperating surfaces of this slide and the guide rod I14 are of non-circular form so that the slide is free to rise and fall on this rod but incapable of turning thereon, thereby always maintaining the saddle bars in the proper position relative to the parts with which the same cooperate during the operation of the machine.

The power for raising and lowering this lifting frame is preferably derived from a hydraulic motor having a horizontal cylinder I13 mounted transversely on the lower part of the mainframe, a piston I15 reciprocating in this cylinder and provided with a piston rod I16 extending through one head of the cylinder. This piston is reciprocated by alternately admitting a live pressure fluid into and exhausting the spent pressure fluid from opposite ends of this cylinder by means of a suitable valve mechanism.

Motion is transmitted from this motor to the lifting frame by means of a driven lever of elbow or bell crank form and having a lower horizontal arm I11 which is connected at its free end by means of a link I18 with the slide HI and has an upwardly projecting adjusting arm I19; and a driving lever of straight form having a lower arm I80 which is connected by means of a link I8I with the piston rod I15 while its upper adjusting arm I82 is connected with the adjusting arm I19 of the driven lever. The driving and driven levers of this transmitting mechanism are so mounted and connected with each other that the vertical strokes of the lifting frame may be regulated to insure accurate alignment of the drum with the expanding mechanism in the elevated position of the drum and also to permit of adapting the machine to drums of various diameters and still maintain a uniform stroke of the piston I15 of the hydraulic motor. This is preferably accomplished by the means disclosed in said patent application.

The mechanism of this machine is so timed that after the conveyor reaches the end of a forward stroke and the respective feeding dogs of the same bring a drum to the expanding station of the machine, then the lifting mechanism is operated by its motor so that the saddle engages with the underside of the respective drum and raises the same from the conveyor into a position in which the drum is axially in alignment with the operating elements of the bead expanding mechanism and enable the same to operate properly upon the drum for the production of beads thereon.

In order to positively hold the drum in a position in which it is aligned with the expanding mechanism, means are provided which are engaged by the upper side of the drum in its elevated position so thatthe drumis gripped both on its underside and on its upper side and thereby reliably held in place while the bead expanding mechanism is operating upon the same.

Various means may be provided for this purpose but those shown in the drawings have been found satisfactory in practice. As there shown, these means comprise two retaining or abutment heads or bars I96 arranged above the path of the drums at the expanding station and adapted to be engaged by the upper side of the drum adjacent to opposite ends thereof when the same is in its elevated position, as shown in Figs. 3 and '7, a vertical adjusting rod I91 projecting upwardly from each of these retaining heads and slidably mounted in a pair of guide lugs I98 which are mounted on the upper part of an overhanging arch I99 forming part of the stationary frame of the machine, an adjusting collar 200 arranged upon the adjusting rod I91 between the guide lugs I98, and a set screw 20l threaded into this collar and engaging this rod. Upon loosening the screw 2M the rod I91 may be adjusted vertically in order to bring the abutment head I 96 into the proper position to be engaged by the upper side of the drum when the latter has been elevated by the lifting mechanism into a position in which it is accurately in alignment with the bead expanding mechanism, thereby holding the drum reliably in place during the subsequent operations of forming beads thereon.

After the drum has been elevated from the conveyor mechanism into a position in which it is in axial alignment with the bead expanding mechanism, the same is operated upon by the ex panding mechanism for producing the circumferential beads thereon adjacent to opposite ends of the drum. This expanding mechanism comprises two sections D, E which are arranged along opposite sides of the conveyor mechanism at the expanding station, and each of these expand ing mechanisms is adapted to produce one of the beads on the drum at a point between the center and the end thereof, as will presently appear.

The two sections of this expanding mechanism are mounted respectively on horizontally and transversely movable slides or carriages 202d, 202e which are arranged on opposite sides of the path of the drum conveying mechanism, and each of which is guided on the main frame by means of flanges 203 arranged on the lower part of the respective slide, and moving in horizontal transverse guideways 204 formed on the adjacent part of the main frame I03, as best shown in Figs. 2, 3, 9, and 11.

Each of these slides or carriages is preferably actuated by a motor so that the same is retractmoved forward by the conveyor mechanism, but after a drum has been moved forward to the expanding station by the conveyor mechanism and raised by the elevating mechanism into alignment with the expanding mechanism then the slides carrying the sections of the expanding mechanism are moved toward each other for the purpose of bringing the expanding elements mounted on the slides into the proper position within the respective ends of the drum, preparatory to producing the beads thereon.

The motors for this purpose preferably are of the hydraulic type and comprise power cylinders 205d, 205e mounted horizontally and transverse- 1y on the main frame below the slides 202d, 2020 and are provided with pistons 206d. 206e, each of which has a rod 201 projecting through the outer head of the respective cylinder. The pistons of these motors have uniform throw and are reciprocated within their cylinders by alternately admitting live pressure medium to and discharging the spent pressure medium at opposite ends of this cylinder by a suitable valve mechanism.

In order to permit of adjusting the position of each slide 202d, 202e with reference to the hydraulic motor which actuates the same and enable the expanding elements of the respective slide to be so located that the beads are produced at the desired place on the barrel bodies, means are provided whereby each slide may be adjusted lengthwise with reference to its motor.

In the preferred form these means, as shown in Figs. 2, 3, and 11 comprise across head 208 secured'to the outer end of each'of the piston rods 201, and longitudinal adjusting screws 209 which are mounted on brackets 2l0 on an adjacent part of the respective slides so as to be capable of rotation thereon but held against lengthwise movement thereon, and having threaded engagement with nuts 2 on the adjacent part of the cross heads 208. Upon turning each screw 209 in-one direction or the other the respective slide and the expanding mechanism mounted thereon will be moved lengthwise of its motor but transversely of the path of the drums and thereby enable the expanding mechanism to be accurately located for performing thebead expanding operation properly on the respective end of the drum.

Means are provided for causing the two slides which carry the two sections of the bead expanding mechanism to move simultaneously, horizontally and transversely relative to the conveyor' mechanism intoand out of their operative posierly form the beads at opposite ends of the barrel body.

A satisfactory means for accomplishing this purpose is shown in the drawings and comprise an equalizing gear wheel 2|2 rotatably mounted by means of a vertical axle 2|3 which is journaled on a part of the main frame of the machine below the path of the conveyor adjacent to the bead expanding mechanism, as best shown in Figs. 4 and 7, and meshing on its diametrically opposite sides with gear racks 2, each of which is arranged transversely-of the machine and is connected at its outer end by means of an attaching arm 2l5 with the respective cross head 200. By this meansthe pistons 206 of both hydraulic motors which shift the expander supporting carriages or slides are compelled to move in unison into and out of their operative positions and thus insure the proper timing of the operation of the two sections of this expanding mechanism on opposite ends of the drum.

Upon each of the slides or carriages 202d, 202a of the bead expanding mechanism is mounted means for producing a circumferential bead adjacent to one end of the body of the sheet metal barrel by expansion of the metal thereof from the interior of the body, which means are identical in construction so that the following description of one will apply to both of these means, but for convenience in subsequently describing the operation of the machine as a whole the means for expanding a bead on one end of the barrel body is identificd by the reference character D, and the means for expanding a bead adjacent to the opposite end of the barrel body will be identified generally by the reference character E.

Upon the upper part of each slide 202d, 202a is mounted a support 2|6 which is generally of hollow shape and in effect forms a part of the respective slide and reciprocates transversely therewith. Arranged horizontally and transversely with refercnce to the line of movement of the barrel drum feeding mechanism and centrally within the hollow support 2 l 6 of each of the carriages 202d,

2521: is a reciprocating shifting or follower rod 2 l1 which is guided at its front and rear ends on guideways 2l8, 2l9 forming part of this slide or carriage. Reciprocating movement is imparted to this shifting rod by means of a motor which is preferably of the hydraulic type and mounted on the respective carriage so as to move bodily therewith.

As best shown in Figs. 1, 2, and 3 these bydraulic motors comprise power cylinders 220d, 22Ee mounted respectively on the outer or rear ends of the carriages 292d, 202s and pistons 22kt, 22le reciprocating lengthwise in these cylinders and each provided with a piston rod 222 which is connected by means of a coupling with the outer end of the respective shifting rod 211, as best shown in Figs. 3 and 10. This coupling consists of two coupling blocks 223 which are clamped against opposite sides of the opposing ends of each piston rod 222 and the shifting rod 2 l1 and held together by means of screws 224, one end of these blocks having threaded engagement with the piston rod, as shown at 225, and the opposite end of these blocks being provided. with internal flanges 225 which engage with an annular groove 22'! in the adjacent outer'or rear end of the respective shifting rod 2, as shown in Fig. 10.

A pressure medium is alternately admitted into and discharged when spent from opposite ends of each of the cylinders 220d, 220e for the purpose of reciprocating the pistons therein by a suitable controlling valve mechanism.

The numeral 228 represents an inner or front follower which is connected with the inner or front end of each follower or shifting rod 211 and the numeral 229 is an outer or rear follower secured to the rear part of this follower rod. Around the inner or front follower 228 a plurality of expandin jaws, shoes or dies 230 are arranged in an annular row, each of these jaws or dies being provided with a forming face 23| which is of segmental form circumferentially of the axis of the follower rod and of rounded form in cross section. These several expanding jaws or dies are movable radially simultaneously for the purpose of contracting the several expanding dies asa whole and reducing the diameter of the forming surfaces thereof in order to permit of introducing these expanding dies into one end of the body of the sheet metal barrel which is to be operated upon ace-2,247

and thereafter spreading or moving these dies radially outward for the purpose of increasing the diameter of the forming surface of the several expanding dies and causing them to simultaneously engage the interior of the sheet metal body of the barrel and deflect that part of the metal thereof which is engaged by these forming faces outwardly so as to form an annular bead on the barrel body, as shown in the left hand part of Fig. 3 in connection with the section D of the expanding mechanism.

After the metal of the barrel body or drum has been thus expanded to form this annular outwardly projecting bead thereon the several dies are again contracted so as to reduce the dimeter of the forming faces thereon and permit these expanding dies to be withdrawn from the respective end of the barrel body. This radial movement of the expanding dies is produced by motion derived from the longitudinally movable follower rod 2H and its front and rear follower heads 228, 229. The means for this purpose include a plurality of longitudinal expanding levers 232 arranged in an annular row around the follower rod 2| each of these levers being pivoted between its front and rear ends by means of a pivot 233 to the adjacent part of the carriage support 2I6. Each lever has one of the expanda ing dies 230 secured to its front end. An annular row of front radial toggles or links 234 is provided, each of which is pivotally connected at its inner and outer ends with the periphery of the front follower and the inner end of one of the dies 230. An annular row of rear toggles or toggle links 235 is provided, each of which is pivotally connected at its inner end with the rear arm of one of the expanding levers 232 and pivotally connected at its outer end with the peripheral part of the rear follower 229, as shown in Figs. 3, 8, and 9.

While each carriage or slide is effecting its forward movement the respective follower rod 2|! and the followers mounted thereon are arranged in their rearmost position relative to this carriage so that the front and rear sets of toggles assume an inclined position and cause the several expanding levers and the expanding dies to be-moved in a direction which will contract the dies and permit the same to be introduced into an end of the drum or body of the barrel, as shown in connection with the right hand section E of the bead expanding mechanism.

After the expanding dies have reached the desired position within the sheet metal drum or body of the barrel, each expander supporting carriage remains at rest and the follower rod 2|! and its followers 228, 228 are moved forwardly or inwardly whereby the front and rear sets of toggles 234, 235 are shifted from the inclined position shown in connection with section E to the straightened or radial position shown in connection with section D of the expanding mechanism, thereby causing the several expanding dies to engage the bore of the sheet metal drum or body and force the same radially outward, and producing an annular or circumferential bead I02 on the exterior of this drum or body, as shown in connection with section D of the expanding mechanism in Fig. 3. Each expander carriage or slide remains at rest until the several expanding dies associated therewith have been contracted into their inoperative position.

The mechanism for shifting the expanding mechanisms bodily into and out of their operative position and expanding and contracting the forming dies of the several expanding devices is so timed that one set of expanding dies is expanded and contracted while the other set of expanding dies is at rest in a contracted position, and after the first set of dies has been expanded and contracted the second set of dies is expanded and contracted, and after both sets of dies have been thus expanded and contracted, both of the respective expander carriages or slides are again moved rearwardly or outwardly relative to the drum conveying mechanism in order to permit the respective drum to be advanced another step in its progress through the machine.

By thus operating the expanding devices successively the metal of the body is free to fiow lengthwise in one direction while forming one of the beads and lengthwise in the opposite direction while forming the other bead, and thus avoid stretching the metal improperly.

In order to guide the front part of the expanding mechanism of each section properly into the respective end of the drum or barrel body, guiding means are provided which are movable with the carriage of each expanding section and engage with the inner side of the top of each drum or body. In its preferred construction the guiding means associated with each section of the expanding mechanism comprises a guide bar 236 arranged lengthwise adjacent to the upper part of the support 2l6 of each of the carriages or slides 202d, 2021: and having its front end secured to-a tubular extension 231 (see Figs. 2 and 3) of the respective support 2l6 and provided with an inclined outer face 238, and an adjusting screw 239 arranged on the rear part of the guide bar 236 and engaging with the adjacent part of the support 2l6, as shown in Fig. 3. As each of the carriages 202d, 2ll2e moves forwardly or inwardly the respective inclined face 238 of the guide bar 236 engages with the upper part of the bore of the barrel body or drum at one end thereof, and raises the same into engagement with the adjacent abutment I96 until the drum engages with the horizontal rear part 24l of this bar, thereby properly centering the drum with reference to the several expanding dies before the latter are engaged with the bore of the drum and produce an outwardly projecting bead thereon. The front arms of the expanding levers 232 are preferably guided in their radial movements by radial guide slots 240 (see Figs. 1 and 2) which are formed on the front ends of the support extension 23! and'receive the respective arms of these levers, as best shown in Figs. 1, 2, and 3.

As an additional means for accurately locating the barrel drum or body with its longitudinal axis transversely of the conveyor mechanism and parallel with the line of movement of the carriages or slides of the two sections of the expanding mechanism, each of these slides is provided with end gaging means which are adapted to engage with opposite ends of the barrel drum or body during the last part of the forward or inward movement of these slides toward each other, and thereby definitely locate this drum between these slides preparatory to forming the beads thereon.

In the preferred construction these end gaging means comprise two gaging plates 254 arranged adjacent to the upper part of each expander supporting slide or carriage on opposite sides of the longitudinal center thereof in position to engage with the upper part of one end of the barrel drum when the respective slide is in its foremost or innermost position. Each of these end gage plates is capable of longitudinal adjustment on the respective slide for the purpose of adapting the same to drums of different length, this being accomplished in the present instance by means of a horizontal longitudinal adjusting rod 255 secured at its front end to the respective end gage plate 254 and passing withits rear part through a supporting lug 256 on the adjacent part of the slide, and clamping screw nuts 251 arranged on said gage supporting rod and bearing against opposite sides of said lug, as shown in Figs. 1, 2, and '7. Each of the gage plates is also capable of radial adjustment with reference to the axis of the respective expanding mechanism by extending the rod 255 at its front end through a longitudinal slot 258 in said gage plate and providing this rod with two clamping screw nuts 259 which bear against opposite sides of said gage plate, as best shown in Figs. 1, 2, and 7.

In the operation of this machine both sections of the expanding mechanism mounted respectively on the slides or carriages are moved inwardly simultaneously and also outwardly simultaneously, but the expanding dies of the two.

sections are actuated so that they perform their expanding operations successively instead of simultaneously. During these expanding operations the expanding dies of one expanding section are first spread for forming a head on one end of the body or drum, and then these dies are contracted out of engagement from the drum. After one set of expanding dies has thus per- "formed its beading operation and released the drum the other set of expanding dies of the other section are moved radially outward for forming a bead on the opposite end of the drum or body, and then these last-mentioned dies are again contracted out of their operative engagement from the same. By this means those parts of the metal drum adjacent to the place where each head is being formed are free to fiow in order to form the laterally projecting bead thereon without producing any undue stretching or thinning of the metal and thus avoiding weakening of the same.

In order to guide the drum or body of a sheet metal barrel into the position for locating its opposite ends relative to the respective expanding devices where the drum comes to rest under the action of the conveyor or feeding mechanism, guiding means are provided which preferably consist of two guide plates 242 secured to a suitable stationary' part of the machine, and provided at their rear ends with inclined front faces 243 which converge forwardly, and straight rear parts 244 which are parallel with each other. As the drum or body of the barrel is moved forwardly by the conveyor mechanism the opposite ends of the barrel are engaged by the inclined rear parts 243 of the guides 242 and directed into the space between the parallel rear parts 242, a clamping plate 246 between which and an adjacent part 241 of the main frame said adjusting arm 245 is received, and clamping screws 248 which connect the clamping plate 246 with said frame member 241 and serve to grip said arm 245 for holding it against displacement after the same, together with the guide bar 242, have been adjusted to the desired position.

After both sections of the expanding mechanism have been withdrawn from opposite ends of the drum or body of the barrel the lifting mechanism is lowered for again depositing the drum upon the adjacent part of the feeding or conveying mechanism, and then the latter advances another step to the next station of the machine preparatory to discharging the barrel'body from the machine.

The hydraulic motors which are mounted on the expander supporting slides or carriages must be supplied with fluid under high pressure in order to operate the same, and as this fluid is taken from a pressure means which is located at a definite or fixed place, and the cylinders which operate the bead expanding dies or shoes move with the carriages supporting the expanding mechanism, it is necessary to employ flexible means whereby the hydraulic pressure fluid is conducted to and discharged from each end of the cylinders 220d, 220a which form parts of the hydraulic motors, whereby the expanding dies or shoes are actuated.

It has been found that flexible hose is not satisfactory for this purpose inasmuch as it lacks strength and durability. A telescopic piping connection of metal has therefore been provided for each of the conduits leading to each end of these hydraulic motor cylinders, each of these telescopic piping connections being constructed as follows, and best shown in Figs. 1, 2, 3, 5,'

and 6:-

The numeral 260 represents an inner telescopic pipe of metal which is mounted stationarily on the main frame below the path of one of the expander supporting slides and provided intermediate of its endsv with a lateral port or opening 26l; and the numeral 262 represents an outer telescopic pipe which surrounds the inner pipe 260 and is of larger diameter and spaced therefrom by an interveningpassage which communicates with the lateral opening or port 26! of the inner pipe. This outer pipe is mounted on the underside of the respective carriage or slide so as to move therewith and cause the outer pipe to be reciprocated lengthwise of the inner pipe, a tight joint being effected between oppositev ends of the outer telescopic pipe 260 by means of stuffing boxes or packings 263 in order to avoid leakage at these places.

The location of the lateral port 26l of the inner pipe and the stroke of the respective carriage or slide is such that at either extreme of this stroke the port or opening 26l will always be in communication with the interior of the outer telescopic pipe and thereby maintain a constant fluid connect-ion between the inner and outer pipes. One end of the inner telescopic pipe communicates with a, pressure fluid conducting the pipe 264, and the outer telescopic pipe communicates with a pressure fluid conducting pipe 265, which last-mentioned pipes 264 and 265 form part of the conduit whereby the pressure fluid is conducted to and from one end of one of the cylinders of the hydraulic motors which operate the two sections of the expanding mechanism.

In the present case the pipe 265 leads to one end of one'of these cylinders, and the pipe 264 leads to the source of fluid'pressure supply and suitable valve mechanism which controls the same to and from the respective cylinder.

Obviously the inner pipe might be mounted on the carriage or slide and the outer pipe mounted on the stationary frame, in which case the inner pipe would be connected with the respective motor cylinder and the outer pipe with the fluid pressure supply, this being a reversal of the organization shown in Figs. 3, 5, and 6.

I claim as my invention:

1. A machine of the character described, comprising beading means for forming a circumferential bead on the body of a sheet metal barrel including a plurality of beading dies arranged in an annular row and adapted to move radially relative to the axis of said body, and means for actuating said dies including a plurality of levers arranged lengthwise of the axis of said body and each connected at one end with one of said dies, and operating means connected with the opposite ends of said levers, including a follower movable lengthwise of the axis of said barrel, and toggle links each connecting the follower with one of said levers.

2. A machine of the character described, comprising beading means for forming a circumferential bead on the body of a. sheet metal barrel including a plurality'of beading dies arranged in an annular row and adapted to move radially relative to the axis of said body, and means for actuating said dies including a plurality of two armed levers arranged lengthwise of the axis of said body and each having one of its arms connected with one of said dies, a follower movable lengthwise of the axis of said barrel, and a plurality of toggles each pivoted at its opposite ends on said follower and the other arm of one of said levers.

3. A machine of the character described, comprising beading means for forming a circumferential bead on the body of a sheet metal barrel including a. plurality of beading dies arranged in an annular row and adapted to move radially relative to the axis of said body, and means for actuating said dies including a plurality of levers arranged lengthwise of the axis of said body and each connected at its front end with one of said dies, a follower rod movable lengthwise of the axis of said body, front and rear followers secured to said rod, a plurality of front toggles each pivoted at its opposite ends to said front follower and one of said dies, and a plurality of rear toggle links each pivotally connected at its opposite ends with said rear follower and the rear end of one of said levers.

4. A machine of the'character described, comprising beading means for forming a circumferential bead on the body of a. sheet metal barrel including a plurality of beading dies arranged in an annular row and adapted to move radially relative to the axis of said body, and means for actuating said dies including a. plurality-of levers arranged lengthwise of the axis of said body and each connected at its front end with one of said dies, a follower rod movable lengthwise of the axis of said body, front and rear followers secured to said rod, a plurality of front toggles each pivoted at its opposite ends to said front follower and one of said dies, a plurality of rear toggle links each pivotally connected at its opposite ends with said rear follower and the rear end of one of said levers, and a hydraulic motor for actuating said follower rod having a cylinder, a piston connected with said follower rod, and a valve mechanism for alternately admitting and discharging pressure medium from opposite ends of said cylinder.

5. A machine of the character described comprising beading means for forming a circumferential bead on the body of a sheet metal barrel including a plurality of beading dies arranged in an annular row and adapted to move radially relative to the axis of said body, and means for actuating said dies including a plurality of levers arranged lengthwise of the axis of said body and each connected at its front end with one of said dies, a follower rod movable lengthwise of the axis of said body, front and rear followers secured to said rod, a plurality of front toggles each pivoted at its opposite ends to said front follower and one of said dies, a plurality of rear toggle links each pivotaliy connected at its opposite ends with said rear follower and the rear end of one of said levers, a hydraulic motor for actuating said follower rod having a cylinder, a piston connected with said follower rod, and a valve mechanism for alternately admitting and discharging pressure medium from opposite ends of said cylinder, a barrel body holder, and a plurality of slides each carrying one of said beading means and movable toward and from opposite sides of saidbarrel body holder.

6. A machine of the character described comprising means for supporting in an operative position a sheet metal barrel body, two separate bead forming devices adapted to receive a barrel body between them, and actuating means for said head forming devices adapted to successively move said devices into and out of engagement with opposite ends of said body and form beads thereon first at one end of the body and then at the opposite end thereof.

7. A machine of the character described comprising means for supporting in an operative position a sheet metal barrel body, two separate bead forming devices adapted to receive between them a barrel body and adapted to form beads on opposite ends of said body, and operating means for moving said bead forming means forwardly into an operative position relative to the ends of said body, then actuating one of said devices to form a head on one end of the body, then actuating the other of said devices to form a bead on the other end of said body, and then moving both of said deviccsbackwardly into an inoperative position relative to said body.

8. A machine of the character described comprising means for supporting a sheet metal barrel body, a plurality of forming means for forming heads at opposite ends of the sheet metal body, shifting means for moving said forming means into and out of opposite ends of said barrel body, and actuating means for said forming means adapted to first expand and contract the forming means at one end of the barrel body into and out of engagement with said body for forming a bead on the respective end thereof and thereafter expanding and contracting the other forming means at the other end of said body into and out of engagement with said body for forming another bead at the last mentioned end thereof.

9. A machine of the character described, com prising beading means for forming a circumferential bead on the body of a sheet metal barrel including a plurality of beading dies arranged in an annular row and adapted to move radially rel-- ative to the axis of said body, and means for actuating said dies including a plurality of levers arranged lengthwise of the axis of said body and metal barrel, beading means for forming a circumferential bead on said body including a slide movable toward and from said body supporting means, expanding elements mounted on said slide and adapted to engage the inner side of said body, and shifting means for moving said slide toward and from said body support including a. power cylinder, a piston reciprocable in said cylinder and having a rod, and means for adiustably connecting said rod and slide including a cross piece slidable lengthwise on said slide and connected with said rod, and an adjusting screw having a threaded engagement with said cross piece and mounted on said slide so as to be rotatable thereon but held against lengthwise movement relative thereto.

11. A machine of the character described, comprising supporting means for supporting the body of a sheet metal barrel, beading means for forming circumferential beads on said body adjacent to opposite ends thereof including guideways arranged at opposite ends of said body supporting means, slides movable toward and from each other on said guideways, bead forming elements mounted on each of said slides and adapted to engage with the inner side of said body adjacent to the opposite ends thereof, means for causing said slides to move simultaneously toward and from each other including parallel gear racks secured respectively to said slides, and a gear whekesl meshing on opposite sides with said gear rac 12. A machine of the character described, comprising supporting means for supporting the body of a sheet metal barrel, beading means for forming circumferential beads on said body adjacent to opposite ends of said body supporting means, slides movable toward and from each other on said guideways, bead forming elements mounted on each of said slides and adapted to engage with the inner side of said body adjacent to the opposite ends thereof, means for causing said slides to move simultaneously toward and from each other including parallel gear racks secured respectively to said slides, a gear wheel meshing on opposite sides with said gear racks, a hydraulic motor for shifting each of said slides, and valve mechanism for controlling the pressure medium to and from opposite ends of the power cylinder of each motor. i

13. A machine of the character described, comprising holding means for holding the body of a sheet metal barrel, beading means for forming a circumferential bead on said body including a slide movable toward and from said holding means, laterally movable beading shoes mounted on said slide and adapted to engage the inner side of said body, a fluid operated motor for which form part of the pressure fluid conduit communicating with one end of said cylinder.

14. A machine of the character described, comprising holding means for holding the body of a sheet metal barrel, beading means for forming a circumferential bead on said body including a slide movable toward and from said holding means, laterally movable beading shoes mounted on said slide and adaptedto engage the inner side of said body, a fluid operated motor for actuating said shoes including a power cylinder mounted on said slide and a piston arranged in said cylinder and connected with said shoes, and means for supplying pressure fluid to and discharging the same from opposite ends of said cylinder including an inner pipe arranged parallel with the line of movement of said slide and having a port in its side, and an outer pipe enclosing said inner pipe and constantly communicating with said port, one of said pipes connecting with a fluid conduit and the other with said cylinder, and said pipes being movable one lengthwise relative to the other.

15. A machine of the character described, comprising means for holding the body of a sheet metal barrel, beading means for forming a circumferential bead on said barrel including a slide movable toward and from said holding means, beading shoes mounted on said slide and movable laterally into, engagement with the inner side of thebody, and guide means arranged on said slide and adapted to engage the upper part of the inner side of said body.

16. A machine of the character described, comprising means for holding the body of a sheet metal barrel, beading means for forming a circumferential bead on said barrel including a slide movable toward and from said holding means, beading shoes mounted on said slide and movable laterally into engagement with the inner side of the body, and guide means arranged on said slide and adapted to engage the upper part of the inner side of said body, and comprising a longitudinal guide bar having its front end secured to the slide and provided with an inclined face adapted to engage the bore of the barrel body, and an adjusting screw threadingly engaging the rear end of said guide bar and engaging the adjacent part of said slide.

17. A machine of the character described, comprising means for holding the body of a sheet metal barrel, beading means for forming circumferential beads on said body adjacent to opposite ends thereof including two slides movable toward and from opposite ends of said holding means, beading shoes operatively mounted on each of said slides and adapted to form one of said beads on the body, and means for actuating said shoes and timed to operate successively on said body.

18. A machine of the character described, comprising means for holding the body of a sheet metal barrel, beading means for forming circumferential beads on said body adjacent to opposite ends thereof including two slides movable toward and from opposite ends of said holding means, beading shoes operatively mounted on each of said slides and adapted to form one of said beads on the body, and means for actuating said shoes and timed to operate successively on said body, including hydraulic motors mounted respectively on said slides and each operatively connected with the beading shoes mounted thereon, and valve mechanism controlling the admission and discharge of pressure fluid to and from each hydraulic motor and operating to cause the beading shoes of one slide to be engaged with and disengaged from the inner side of the barrel body in advance of the engagement and disengagement of the other beading shoes with said barrel body.

19. A bead-forming machine, having two circular expanding dies mounted for movement in opposite directions into and out of the ends of a metallic drum positioned between the dies, and means for moving the dies into the drum and for expanding the dies in a manner to form the beads substantially separately in point of time.

20. A bead-forming machine, having in combination, two circular dies mounted for movement in opposite directions into and out of the ends of a metallic drum positioned therebetween and mechanisms for actuating the dies substantially simultaneously but in a different timed relation.

21. A bead-forming machine, having in combination, two circular dies mounted for movement in opposite directions, and mechanisms for actuating the two dies to move them into the opposite ends of a metallic drum positioned therebetween, said mechanisms including means for operating the two dies one in advance of the other.

22. A bead-forming machine, having in combination, two circular dies mounted for movement in opposite directions and mechanisms for opposite ends of a metallic drum positioned therebetween, said mechanisms including means for operating the two dies in a predetermined order to form two beads substantially in succession.

23. A bead-forming machine having a bed, two expanding dies, heads slidably supported on said bed and carrying said dies for movement into and out of the opposite ends of a metallic drum, and a single actuating mechanism for each head and die including means for operating the die relative to the head.

24. A machine of the character described, hav ing an expanding and contracting die, a slidably supported head carrying said die, and a single actuating mechanism for moving the head and for operating said die independently of continued movement of said head.

25. The method of forming two spaced beads in a metallic drum which consists in introducing into the drum two expansible dies, and causing said dies to be expanded in a predetermined order so as to form one of said beads in advance of the other. i a

26. The method of forming two spaced beads in a metallic drum which consists in supporting the drum in a stationary position, introducing two expansible dies into the opposite ends of the actuating the two dies to move them into the drum, and then expanding said dies one in adin succession.

BROR J. IMDGREHI.

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