US3754424A - Method for necking-in can bodies - Google Patents

Method for necking-in can bodies Download PDF

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Publication number
US3754424A
US3754424A US00254049A US3754424DA US3754424A US 3754424 A US3754424 A US 3754424A US 00254049 A US00254049 A US 00254049A US 3754424D A US3754424D A US 3754424DA US 3754424 A US3754424 A US 3754424A
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Prior art keywords
end portion
terminal end
forming roll
female
roll means
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US00254049A
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English (en)
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S Costanzo
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EW Bliss Co Inc
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Gulf & Western Ind Prod Co
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Assigned to E.W. BLISS COMPANY, INC., reassignment E.W. BLISS COMPANY, INC., ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: GULF & WESTERN INDUSTRIAL PRODUCTS COMPANY A CORP OF DE
Assigned to BARCLAYS AMERICAN/BUSINESS CREDIT, INC. reassignment BARCLAYS AMERICAN/BUSINESS CREDIT, INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: E.W. BLISS COMPANY
Anticipated expiration legal-status Critical
Assigned to SHAWMUT CAPITAL CORPORATION reassignment SHAWMUT CAPITAL CORPORATION SALE/TRANSFER OF SECURITY INTEREST TO A NEW SECURED PARTY Assignors: BARCLAYS BUSINESS CREDIT, INC.
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • B21D51/2638—Necking

Definitions

  • Conn-table gripping means for positively gripping 1971' a peripheral surface of the can body over a major portion of the circumference and length thereof to posi- [22] $5.3] 72/105, 72/;l2l1,d7i/91 tively hold the can body in a substantially cylindrical nt. 0 4 shape.
  • Female and male rolls act gain a ct- 0! Search d p i ofthe can to defoml the e m 72/105 1 l 0-85 nal end portion inwardly.
  • the female forming roll is positioned within an open end portion of the can body [56] References Cited and is moved outwardly into engagement with the ter- UNITED STATES PATENTS minal end portion of the can body to form an outwardly 2,925,116 2/1960 Eberle 72/105 extending flange thereon for stiffening the end portion 214,581 4/1879 Packham 72/105 of the can body against wrinkling.
  • Open end portions of cylindrical metal can bodies are commonly reduced in diameter or neckin-in to save expenses on end closures for the can body. Reducing the diameter on end portions of a can body still allows the can to hold substantially the same capacity. Reducing the end portions allows the use of a smaller diameter end closure in order to save on material. The smaller area and circumference of the end closure also allows the use of less tin plate, enamel and sealant so that the total cost of a completed can is substantially reduced due to the savings in materials.
  • Cylindrical metal pails and other containers manufactured from relatively soft steel have previously had the end portions thereof reduced by utilizing female and male deforming rolls.
  • relatively soft steel the steel can flow rather easily during'deformation of the end portions of the container and wrinkling is not always a serious problem.
  • metal containers are frequently manufactured from double reduced steel plate in order to save expenses on materials used.
  • Regular steel for use in making can bodies is generally around ten thousandths of an inch thick.
  • such steel is double reduced by rolling it to a thickness of around six and one-half thousandths of an inch thick. Rolling the steel to a reduced thickness work hardens the steel and it does not flow readily under further deformation such as that which takes place during reduction of the terminal end portions of a cylindrical can body.
  • An apparatus and method for necking-in an end portion of a cylindrical can body includes an expandable and contractable gripping means for positively gripping the inner or outer peripheral surface of the can body over a major portion of the circumference and length thereof to-positively hold the can body in a substantially cylindrical shape.
  • the positive holding action of the gripping means prevents formation of wrinkles or fractures in the can body during the necking-in operation.
  • a rotatably mounted female forming roll has a circumferential arcuate groove therein.
  • the female forming roll is positionable within an open end portion of a cylindrical can body for deforming the terminal end portion thereof.
  • a rotatably mounted male forming roll has a circumferential arcuate peripheral surface defining a rib which is receivable in the groove of the female forming roll.
  • male forming roll is positionable outside of the can body adjacent the terminal end portion thereof and with the rib on the male forming roll aligned with the groove on the female forming roll transversely of the longitudinal axis of the can body.
  • Power means is provided for rotating either the can body about its own longitudinal axis, or for rotating the female and male forming rolls in a circular path in order to pass the entire periphery of the terminal end portion of the can body between the female and male forming rolls.
  • Mounting means is provided for independently mounting each of the female and male forming rolls for movement toward and away from the longitudinal axis of the can body.
  • a first operating means is provided for moving the female forming roll away from the longitudinal axis of the can body into engagement with the inner peripheral surface of the can body at the terminal end portion thereof.
  • the power means then operates to move the entire periphery of the termial end portion of the can body between the forming rolls, and the female forming roll deforms the terminal end portion of the can body into an outwardly extending flange so that the terminal end edge of the can body increases in diameter.
  • Second operating means is provided for moving the male forming roll toward the longitudinal axis of the can body and into engagement with the outer peripheral surface thereof at the terminal end portion to deform the terminal end portion into the arcuate groove in the female forming roll. It has been found that positive gripping over a major portion of the circumference and length of the can body positively holds the can body in a substantially cylindrical shape and prevents the terminal end portion of the can body from becoming eccentric so that wrinkles or'fractures cannot form therein during the necking-in operation.
  • Formation of the outwardly extending flange prior to the necking-in operation is also very important in order to prevent wrinkles or fractures because the flange also reinforces the terminal end portion of the can body and holds it in a substantially true cylindrical shape.
  • the pre-flanging operation also works the metal at the extreme terminal end of the can body to elongate the metal and relieve some of the stress which was placed therein by work hardening when reducing the thickness thereof;
  • the male forming roll has an end portion positioned adjacent the terminal edge of the can body.
  • the end portion of the male roll has a circumferential shoulder thereon which is engageable with the terminal end edge of the canbody during the necking-in operation.
  • the circumferential shoulder on the male roll controls the length of the outwardly extending flange'on the terminal end portion of the can body during the necking-in operation. Controlling the length of the flange results in a substantially precise outer peripheral edge on the deformed end portion of the can body so that no trimming operation is necessary prior to application of a closure to the end portion of the can body.
  • yieldable biasing means for yieldablybiasing the male forming roll toward the can body. Deformation of can bodies having welded or soldered seams then allows the male forming roll to yield away from the can body against the force of the yieldable biasing means when the seam passes between the forming rolls.
  • the yieldable biasing means also firmly holds the male forming roll against the terminal end portion of the can body to prevent bouncing of the male role when a seam passes between the rolls.
  • the can body to be deformed has a predetermined diameter
  • each of the female and male forming rolls have a maximum diameter which is substantially less than the predetermined diameter of the can body. This allows positioning of the rolls for rotation on axes off the longitudinal center line of the can body which also assists in necking-in the end portion of the can body without formation of wrinkles or fractures, and without damage to enamel or laquer on the can body.
  • the female forming roll has a minimum diameter across the groove therein and the male forming roll has a greatest diameter across its rib. These minimum and greatest diameters are substantially the same. This arrangement allows both the male and female forming rolls to rotate at substantially the same speed and to rotate substantially the same number of revolutions during passage of the-terminal end portion of the can body therebetween.
  • an adjustable stop is provided for the mounting means of the male forming roll for adjustably positioning the male forming roll adjacent the outer peripheral surface of the can body.
  • the mounting means for the female and male forming rolls comprises a pair of pivotally mounted bearing blocks which are movable toward and away from the longitudinal axis of the can body.
  • a shaft is rotatably mounted on each of the bearing blocks for rotation about a shaft axis.
  • the female forming roll is rotatably mounted on one of the shafts for rotation about a female roll is rotatably mounted on the other of the shafts for rotation about a male roll axis which is eccentric to the shaft axis.
  • the operating means is connected to the shafts so that rotation of the shafts selectively moves the rolls toward and away from the can body due to the eccentricity of the roll axes to the axes of the shafts.
  • a stop collar is provided on the female roll for positioning the female roll within the open end portion of the can body.
  • the stop collar is engageable with the terminal end edge of the can body for locating the female forming roll within the open end portion of the can body in predetermined relationship to the terminal end portion thereof.
  • the terminal end portion of a can body is deformed inwardly into an inwardly directed smoothly curved circumferential bead.
  • the can body merges into the bead over a merging area.
  • the male and female rolls have outer surfaces dimensioned and shaped for squeezing at least a portion of the terminal end portion of the can body during formation of the bead. These surfaces are shaped and'dimensioned for maintaining the merging area free of squeezing engagement action between the surfaces of the roles during formation of the head. This allows an outwardly directed circumferential hump to form in the merging area for relieving stress and preventing wrinkles in the terminal end portion of the can body.
  • an improved necked-in can body is formed having a smoothly curved circumferential hump therein spaced inwardly from the terminal edge of the body.
  • the terminal end portion is smoothly curved inward between the hump and the terminal end edge of the can body to form a circumferential bead extending inwardly.
  • the hump allows the metal of the can body to relieve stresses so that wrinkles are not formed during formation of the bead.
  • FIG. 1 is a top plan view of one form of apparatus constructed in accordance with the present invention and with portions in section for clarity of illustration;
  • FIG. 2 is a cross-sectional elevational looking in the direction of arrows 2-2 of FIG. 1;
  • FIG. 3 is a side elevational view looking in the direction of arrows 3-3 of FIG. 1;
  • FIG. 4 is an end elevational view looking in the direction of arrows 4-4 of FIG. 1;
  • FIG. 5 is a cross-sectional elevational view looking in the direction of arrows 5-5 of FIG. 4;
  • FIG. 6 is a cross-sectional elevational view looking in the direction of arrows 6-6 of FIG. 4;
  • FIG. 7 is a plan view looking generally in the direction of arrows 7-7 of FIG. 3, with portions cutaway from clarity of illustration, and showing the arrangement of the rolls immediately after the terminal end portion of a can body has been positioned therebetween;
  • FIG. 8 is a view similar to FIG. 7 and showing the arrangement of the rolls and the terminal end portion of the can body after the inner female roll has been moved outwardly;
  • FIG. 9 is a view similar to FIGS. 7 and 8, and showing the arrangement of the rolls and the terminal end portion of the can body after the outer male forming roll has been moved into engagement with the terminal end portion of the can body;
  • FIG. 10 is a view similar to FIGS. 7-9, and showing the position of the rolls and the shape of the terminal end portion of the can body after the necking-in operation has been completed;
  • FIG. 11 is a partial cross-sectional elevational view of a can body which has been necked-in in accordance with the present invention and after an end closure has been applied thereto; 7
  • FIG. 12 is a view like FIG. 7 showing the initial position of the forming rolls prior to formation of the inwardly directed circumferential bead in the terminal end portion of a can body;
  • FIG. 13 is a view like FIG. 8 showing the forming roles in a further position for deforming the terminal end portion of a can body
  • FIG. 14 is a view similar to view 12 and 13 showing a further position of the forming rolls
  • FIG. 15 is a view similar to views l2-14 showing the position of the rolls after full movement thereof to deform the terminal end portion of the can body;
  • FIG. 16 is a view similar to FIG. 10 but showing a different shape for the terminal end portion of the can body.
  • FIG. 17 is a view similar to FIG. 11 but showing a slightly different shape for the terminal end portion of the can body.
  • FIG. 1 shows an apparatus A for necking-in terminal end portions of cylindrical metal can bodies as shown at B.
  • Can body B has a substantially cylindrical outer peripheral surface 12 and a substantially cylindrical inner peripheral surface 14.
  • Can body B has at least one open end portion and a terminal end edge 16 at the open end portion thereof.
  • Can body B further includes a terminal end portion 18 adjacent terminal end'edge 16. It should be recognized that the apparatus and method of the present invention can be used with cylindrical can bodies which are open at both ends thereof or with drawn cylindrical can bodies having integral closed bottoms.
  • can bodies which are formed of aluminum steel, and which may be seamless, or have welded or soldered seams.
  • can body B is open at both ends thereof.
  • a rotatable mandrel C defines a gripping means for positively gripping can body B to hold can body B in a substantially true cylindrical shape.
  • Mandrel S is rotatably mounted as in bearing D and has a pulley 22' attached thereto.
  • Mandrel C is a one-piece cylindrical metal member having a substantially cylindrical outer periphery and a tapered central conical bore 30 therethrough.
  • a plurality of circumferentially spaced axially extending slots 32 are formed in mandrel C to define a plurality of gripping members 34. Slots 32 extend from end 36 of mandrel C toward pulley 22 over a major portion of the length of mandrel C. End portion 38 of mandrel C has a threaded bore 40 therein.
  • a conical wedge member E is positionable within bore 30 for expanding gripping members 34 radially outward from longitudinal axis 42 of mandrel C.
  • Wedge member E has a circular hole 44 therethrough and a conical outer surface 46 which is tapered at the same slope as bore 30.
  • a bolt F having a threaded end 48 and an enlarged head 50 is re ceivable through hole 44.
  • can body B may be positively held by many other gripping arrangements.
  • a pair of arcuate wing members may positively grip outer peripheral surface 12 of can body B so that an outside gripping means is used instead of an inner mandrel as shown at C.
  • end 36 of gripping means C is positioned as close to terminal end portion 18 of can body B as is practical.
  • the expandable and contractable gripping means defined by mandrel C and gripping members 34 positively holds can body B in a substantially true cylindrical shape during necking-in of end portion 18 so that wrinkles cannot form in can body B.
  • Bolt F may be loosened to allow gripping members 34 to move radially inward toward longitudinal axis 42 for removing can body B from mandrel C. It will be recognized that many other types of expandable and contractable gripping means may be utilized for gripping a can body B during deformation thereof.
  • Longitudinal axis 42 of mandrel C also defines the longitudinal central axis of can body B.
  • can body B may be considered as defining a first structure.
  • Necking-in apparatus A includes a mounting structure G for rolls which are utilized to deform terminal end portion 18 of can body B.
  • Mounting structure G includes a block member 56 having a pair of spacedapart holes 58 and 60 therethrough.
  • Sleeve bearings 62 and 64 are received in holes 58 and 60.
  • Shafts 66 and 68 are rotatably received in sleeve bearings 62 and 64.
  • Shafts 66 and 68 have threaded end portions 70 and 72 threaded into threaded bores 74 and 76 in bearing blocks 78 and 80.
  • Shafts 66 and 68 have opposite threaded ends 82 and 84 on which lock nuts 86 and 88' are threaded.
  • Bearing blocks 78 and 80 are rotatable with shafts 66 and 68 about longitudinal axes 90 and 92.
  • bearing block 78 has a hole 96 therethrough receiving a sleeve bearing 08.
  • a shaft 102 extends through sleeve bearing 98 and has a female forming roll H rotatably mounted thereon by means of bearing 104.
  • Shaft 102 has threaded portions 106 and 108 for receiving lock nuts 110 and 112 to hold roll bearing 104 on shaft 102 and to hold shaft 102 in sleeve bearing 98.
  • Bearing washers 114 and 116 may be positioned respectively between nut 110 and bearing 104, and between nut 112 and bearing block 78.
  • An additional bearing washer 118 may be positioned between female forming roll H and bearing block 78.
  • Female forming roll H has a circumferential arcuate groove 120 therein to define a concave arcuate outer surface on the outer periphery thereof.
  • Female forming roll H further has a first end portion 122 of a first diameter, and a second end portion 124 of a second diameter which is greater than the first diameter of first end portion 122.
  • a cylindrical member 126 may be positioned on female forming roll H adjacent second end portion 124 thereof to serve as a stop collar. Stop collar 126 has a radially extending circumferential surface 128 which extends outwardly beyond the outer peripheral surface of female forming roll H.
  • Shaft 102 is eccentric so as to rotate in sleeve bearing 98 about longitudinal axis 130, while female forming roll H rotates about a longitudinal axis 132 which is offset from longitudinal axis .130.
  • a block member 134 may be welded or otherwise secured to mounting block 56.
  • Block member 134 has a threaded hole 136 therethrough threadedly receiving adjustment bolt 138 which strikes against bearing block 78, as best shown in FIG. 4, to adjustably rotate bearing block 78 about longitudinal axis 90.
  • Bearing block 78 has another hole 142 therethrough slidably receiving a pin 144.
  • An enlarged threaded bore 146 is coaxial with bore 142 and receives a set screw 148 which bears against pin 144 to adjustably position pin 144 with the end portion thereof extending out of bore 142 and bearing against bearing block 80 to adjustably hold bearing block 80 in a predetermined spaced position relative to bearing block 78.
  • Bearing block 80 has a hole 152 therethrough receiving sleeve bearing 154.
  • a shaft 156 is rotatably received through sleeve bearing 154 and has a male forming roll I rotatably mounted thereon by means of bearing 160.
  • Male forming roll I has a circumferential arcuate convex peripheral surface defining a rib 162 which is receivable in groove 120 of female forming roll H.
  • Male forming roll I also has an end portion defining a flat cylindrical shoulder 164.
  • Shaft 156 has threaded portions 166 and 168 for receiving lock nuts 170 and 172 to hold bearing 160 thereon and to hold shaft 156 in sleeve bearing 154.
  • Bearing washers v174 and 176 may be positioned beneath nuts l70 and 172.
  • a bearing washer 178 may also be positioned between bearing block 80 and an enlarged portion 182 of shaft 156.
  • Shaft 156 is eccentric so that it rotates in sleeve bearing 154 about a longitudinal axis 184, while male forming roll I rotates about a longitudinal axis 186 which is offset from axis 184.
  • bearing block 80 is yieldably biased toward bearing block 78.
  • a block member 190 is welded or otherwise suitably secured to the opposite side of mounting block 56.
  • Block member 190 has a threaded bore 192 receiving an adjustment set screw 194.
  • a coil spring 196 has one end positioned in an enlarged bore 198 which is coincidental with hole 192, and its other end received in a recess 202 in bearing block 80.
  • Coil spring 196 defines a yieldable biasing means which biases against bearing block 80 to rotate bearing block 80 about a longitudinal axis 92 to move male forming roll I toward female forming roll H.
  • the force with which spring 196 biases against bearing block may be adjusted by means of set screw 194.
  • Pin 144 adjustably holds bearing block 80 in spaced relation to bearing block 78 so that rolls H and I are normally spaced-apart and terminal end portion 18 of can body B may be positioned therebetween.
  • first and second operating means defined by levers 206 and 208 are secured to shafts 102 and 156.
  • Levers 206 and 208 have socket head portions 210 and 212 receiving the end portions of shafts 102 and 156.
  • Set screws 214 and 216 may be threaded through suitable holes in socket head portions 210 and 212 for locking levers 206 and 208 on shafts 102 and 156.
  • the eccentric or offset relationship of longitudinal axis for shaft 102, and longitudinal axis 132 about which female forming roll H rotates, is such that movement of lever 206 in a counterclockwise direction as viewed in FIG. 4 rotates shaft 102 within bearing 98 to move female forming roll H to the left as viewed in FIG. 4. Clockwise rotation of lever 206 and shaft 102, as viewed in FIG. 4, will move female forming roll H to the right as viewed in FIG. 4.
  • Mounting block 56 may be slidable on a base 220 for movement toward and away from'mandrel C.
  • a key 222 on base 220 may be slidably received in a key way 224 in the bottom of mounting block 56.
  • Many other arrangements may be provided for moving rolls H and I toward mandrel C and it is also possible to have rolls H and I fixed against such movement, and with mandrel C movable toward and away from rolls H and I.
  • a cylindrical can body B is mounted on mandrel C.
  • the gripping means is then adjusted so that gripping members 34 positively grip inner peripheral surface 14 of can body B over a major portion of the circumference and length thereof.
  • Rolls H and I are normally in spaced-apart relationship as shown in FIG. 7.
  • Mounting block 56 is then moved toward mandrel C to position terminal end portion 18 of can body B between rolls H and I.
  • Female forming roll H is positioned within the open end portion of can body B, and mounting block 56 is moved toward mandrel C until surface 128 on stop collar 126 strikes against terminal end edge 16 of can body B.
  • Second end portion 124 of female forming roll H engages inner peripheral surface 14 of can body B at terminal end portion 18 thereof to increase the diameter of can body B at terminal end edge 16 and deform terminal end portion 18 into an outwardly extending flange as shown in FIG. 8.
  • Formation of the outwardly extending flange reinforces the terminal end portion of can body B against wrinkling and also relieves some of the work hardened stress in the metal of can body B.
  • male forming roll I is moved toward longitudinal axis 42 and can body B by rotating lever 208 clockwise as viewed in FIG. 4.
  • Rib 162 of male forming roll I engages outer peripheral surface 12 of can body B at terminal end portion 18 and moves into groove 120 in female forming roll H to reduce the diameter of can body B at terminal end portion 18.
  • terminal end edge 16 of can body B engages shoulder 164 on male forming roll I in order to control the length of the outwardly extending flange on can body B.
  • Circumferential shoulder 164 on male forming roll I has a width greater than the thickness of can body B at the terminal end edge thereof so that second end portion 124 of female forming roll H may engage shoulder 164 outwardly of terminal end edge 16 as shown in FIG. 9.
  • levers 206 and 208 are moved back to the original positions to move rolls H and I away from one another to the positions shown in FIG. 10.
  • the necking-in operation results in a can body having a terminal end portion which curves arcuately inward and then arcuately outward to terminate in a terminal end edge which extends slightly radially outward beyond the outer peripheral cylindrical surface of can body B.
  • a closure 232 may then be applied to the necked-in end portion of can body B as shown in FIG. 11.
  • the necked-in end portion of can body B is reversely folded and interdigitated with a reversely bent end portion 234 of closure 232.
  • can body B may be held stationary while rolls H and I are mounted on a traversing device which will move the two forming rolls in a circular path around terminal end portion 18 of can body B. Itis also possible to drive forming rolls H and I while can body Bis simply mounted on a rotatable gripping device. Yieldably biasing bearing block 80 toward longitudinal axis 42 allows male forming roll I to move away from longitudinal axis 42 when a welded or soldered seam passes between rolls H and I.
  • rolls H and I may be manipulated, and are dimensioned and shaped, for producing an outwardly directed circumferential hump in the terminal end portion of can body B spaced inwardly from terminal end edge 16.
  • female forming roll H is moved outwardly into engagement with the terminal end portion of can body B.
  • First end portion 124 of female forming roll H forms an outwardly directed flange on the very terminal end portion of can body B.
  • First end portion 122 of female forming roll H contacts the inner surface 14 of can body B at a position spaced inwardly from terminal end edge 16 for forming an outwardly directed circumferential hump 250 therein.
  • can body B merges into the inwardly directed circumferential head over a circumferential area identified by numeral 256 and which may be termed a merging area.
  • rolls H and I have the mating outer surfaces thereof shaped and dimensioned for maintaining merging area 256 free of squeezing action between rolls H and I during deformation of the terminal end portion of the can body. This allows hump 250 to form in the can body and it is not squeezed down because the rolls do not engage the can body over that area.
  • outer male roll I is shaped and dimensioned so that it is spaced from outer surface 12 of can body B so that hump 250 can form therein.
  • the width of groove is greater than the width of rib 162 on male roll I.
  • the depth of groove 120 as measured from its bottom and the outer periphery of first end portion 122 is represented by numeral 258.
  • the height of rib 162 on male roll I is represented by numeral 260.
  • Distance 260 is preferably slightly greater than the sum of distance 258 plus the thickness of can body B.
  • hump 250 Although it is possible to positively form hump 250 as described with reference to FIG. 14, it has also been found that it is possible to move female roll H outwardly so that first end portion 122 thereof is simply very near inner surface 14 of can body B while the terminal end edge of can body B is deformed outwardly into a flange. Male forming roll I is then moved inwardly to form the inwardly directed circumferential beadas shown in FIG. 15. Even without first end portion 122 of roll H projecting outwardly far enough to positively form hump 250, it has been found that hump 250 will form as the inwardly directed circumferential bead is formed. This is believed to be due to the metal stress relieving itself over merging area 256 where can body B merges into the circumferential bead.
  • diameters may be measured either from the inner surface thereof, the outer surface thereof or by using nominal diameters.
  • the can body B has a substantially uniform diameter throughout its length.
  • Hump 250 has a diameter slightly greater than the uniform diameter.
  • the inwardly directed circumferential bead between hump 250 and terminal end edge 16 has a diameter which is less than the defined uniform diameter.
  • the difference between the inwardly directed bead diameter and the uniform diameter is preferably substantially greater than the difference between the hump diameter and the uniform diameter.
  • a can body having an outer uniform diameter of two and fiveeighths inches is deformed in such a manner that the outer diameter thereof at hump 250 is 2 21/32 inches while the outer diameter thereof at the inwardly directed circumferential bead is 2 2% inches.
  • Hump 250 is also smoothly curved outward from the longitudinal axis of can body B in a direction toward terminal end edge 16 and is then reversely curved inward toward the longitudinal axis of can body B in a direction toward terminal end edge 16. Where it reverses its curvature, hump 250 also merges directly into the inwardly directed circumferential bead. Hump 250 also has a width measured parallel to the longitudinal axis of can body B which is substantially less than the width of the inwardly directed circumferential bead.
  • said male forming roll means has an end portion aligned with said second end portion of said female forming roll means transversely of said longitudinal axis of said can body, said end portion of said male forming roll means having a circumferential shoulder engageable with said terminal end edge of said can body during deformation of said terminal end portion.
  • each of said female and male forming roll means has a maximum diameter substantially less than said predetermined diameter.
  • said mounting means for said female and male forming roll means comprises a pair of pivotally mounted bearing block means movable toward and away from said longitudinal axis of said can body, a shaft rotatably mounted on each of said bearing blocks for rotation about a shaft axis, said female forming roll means being rotatably mounted on one of said shafts for rotation about female roll axis eccentric to said shaft axis, said male forming roll means being rotatably mounted on the other of said shafts for rotation about a male roll axis eccentric to said shaft axis.
  • said male forming roll means has an end portion aligned with said terminal end edge transversely of said longitudinal axis of said can body, said end portion of said male forming roll means having a circumferential shoulder engageable with said terminal end edge of said can body during deformation of said terminal end portion.
  • each of said female and male forming roll means has a maximum diameter substantially less than said predetermined diameter.
  • said mounting means for said female and male forming roll means comprises a pair of pivotally mounted bearing block means movable toward and away from said longitudinal axis of said can body, a shaft rotatably mounted on each of said bearing blocks for rotation about a shaft for said male forming roll means toward said longitudinal axis of said can body.
  • said can body has a longitudinal seam and further including yieldable biasing means for biasing said male forming roll means toward said longitudinal axis whereby said seam acts against said male forming roll means to move said male forming roll means away from said longitudinal axis against biasing force of said yieldable biasing means.
  • said female forming roll includes a stop collar and further including the step of engaging said terminal end edge against said stop collar during said step of positioning said female forming roll within said open end portion to locate said female forming roll within said open end portion in predetermined relationship to said terminal end portion.
  • said male forming roll includes an end portion having a circumferential shoulder thereon and further including the step of engaging said terminal end edge with said circumferential shoulder during said step of deforming said terminal end portion between said groove and rib.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
US00254049A 1972-05-17 1972-05-17 Method for necking-in can bodies Expired - Lifetime US3754424A (en)

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US (1) US3754424A (enrdf_load_stackoverflow)
JP (1) JPS4954265A (enrdf_load_stackoverflow)
CA (1) CA991025A (enrdf_load_stackoverflow)
DE (1) DE2321624B2 (enrdf_load_stackoverflow)
FR (1) FR2184920B1 (enrdf_load_stackoverflow)
GB (1) GB1397512A (enrdf_load_stackoverflow)
IT (1) IT983035B (enrdf_load_stackoverflow)
SU (1) SU919606A3 (enrdf_load_stackoverflow)

Cited By (30)

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US3831416A (en) * 1973-01-04 1974-08-27 United Can Co Necking die assembly with internal rollers
US3874209A (en) * 1973-05-04 1975-04-01 Fmi Mecfond Aziende Mecc Apparatus for simultaneously tapering and flanging the bodies of cylindrical metal cans
US3913366A (en) * 1974-05-10 1975-10-21 Gulf & Western Mfg Co Apparatus for necking-in can bodies
US3953995A (en) * 1975-05-27 1976-05-04 Haswell John W Means for making double groove pulleys
US4070888A (en) * 1977-02-28 1978-01-31 Coors Container Company Apparatus and methods for simultaneously necking and flanging a can body member
US4341103A (en) * 1980-09-04 1982-07-27 Ball Corporation Spin-necker flanger for beverage containers
WO1984002667A1 (en) * 1982-12-30 1984-07-19 Metal Box Plc Forming necks on hollow bodies
US4838064A (en) * 1987-05-13 1989-06-13 Lanico-Maschinenbau Otto Niemsch Gmbh Apparatus for flanging and swaging a cylindrical can body on both ends
US4870847A (en) * 1988-05-20 1989-10-03 Ihly Industries, Inc. Method and apparatus for forming outwardly projecting beads on cylindrical objects
US4927043A (en) * 1987-11-13 1990-05-22 Ihly Industries, Inc. Necked-down can having a false seam and an apparatus to form same
EP0402511A1 (de) * 1989-06-16 1990-12-19 RMG Beierling GmbH Vorrichtung zum Einziehen von Blechzylindern, insbes. Fassmänteln
US5121621A (en) * 1991-02-20 1992-06-16 Ihly Industries, Inc. Preformed flange reforming process and apparatus
US5150595A (en) * 1991-05-09 1992-09-29 Ihly Industries, Inc. Process and apparatus for working an edge portion of a container flange
EP0507380A1 (en) * 1991-04-03 1992-10-07 THOMASSEN & DRIJVER-VERBLIFA N.V. Device for forming a constriction on the open end zone of a metal can
US5245848A (en) * 1992-08-14 1993-09-21 Reynolds Metals Company Spin flow necking cam ring
US5279143A (en) * 1993-01-15 1994-01-18 Victaulic Company Of America Self-tracking roll for grooving thin walled pipe
US5282375A (en) * 1992-05-15 1994-02-01 Reynolds Metals Company Spin flow necking apparatus and method of handling cans therein
US5349836A (en) * 1992-08-14 1994-09-27 Reynolds Metals Company Method and apparatus for minimizing plug diameter variation in spin flow necking process
US5372028A (en) * 1991-04-03 1994-12-13 Thomassen & Drijver-Verblifa N.V. Device for forming a construction on the open end zone of a metal can
WO1996035529A1 (de) * 1995-05-13 1996-11-14 Krupp Kunststofftechnik Gmbh Verfahren zur bildung eines geneckten und gebördelten abschnitts an einem zylindrischen hohlkörper und vorrichtung zum durchführen des verfahrens
US5857369A (en) * 1996-12-04 1999-01-12 Fang; Jui-Hwa Method for fabricating light weight pipe connectors
US6058753A (en) * 1997-12-10 2000-05-09 Crown Cork & Seal Technologies Corporation Can base reforming
US6457226B1 (en) 1998-09-03 2002-10-01 Guido-Michael Krehle Process for beading sheet metal parts in a beading machine
US6591652B1 (en) 2001-07-13 2003-07-15 Emerson Electric Co. Roll grooving apparatus
US20030167815A1 (en) * 2000-07-21 2003-09-11 Johan Massee Method and forming machine for deforming a hollow workpiece
US20030172701A1 (en) * 2000-07-21 2003-09-18 Johan Massee Forming machine and method for deforming a hollow workpiece
CN103639308A (zh) * 2013-12-10 2014-03-19 合肥亚辰机械制造有限公司 洗衣机内桶缩口加工成型工艺
CN103639309A (zh) * 2013-12-10 2014-03-19 合肥亚辰机械制造有限公司 洗衣机内桶缩口机
CN108909019A (zh) * 2018-08-08 2018-11-30 华北理工大学 纤维板桶封底设备
CN113414597A (zh) * 2021-06-22 2021-09-21 鑫磊压缩机股份有限公司 一种储气罐罐体缩口装置、设备和生产线

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GB1534716A (en) * 1975-09-05 1978-12-06 Metal Box Co Ltd Containers
GB2031768B (en) * 1978-10-11 1982-06-16 Metal Box Co Ltd Making container bodies
DE3118783C2 (de) * 1981-05-12 1986-02-20 Cantec, Inc., Fort Worth, Tex. Vorrichtung zum Sicken des Rumpfes eines Blechgebindes
DE3234881A1 (de) * 1982-09-21 1984-03-22 Arberger Verpackungen GmbH & Co KG, 2806 Oyten Verfahren und vorrichtung zum einziehen des rumpfes von zylindrischen feinstblechdosen und nach diesem verfahren hergestellte feinstblechdose
US4626158A (en) * 1983-07-05 1986-12-02 Gallay S.A. Container seam and a process for forming a container seam
FR2548565B1 (fr) * 1983-07-05 1986-05-16 Gallay Sa Procede de renforcement de sertissages et joints sertis, notamment pour emballages
FR2552689B1 (fr) * 1983-09-30 1987-06-19 Gallay Sa Procede d'obtention d'un sertissage triple
US4781047A (en) * 1983-10-14 1988-11-01 Ball Corporation Controlled spin flow forming
DE3624444A1 (de) * 1986-07-19 1988-01-28 Niemsch Otto Lanico Maschbau Maschine zum beiderseitigen boerdeln und einziehen zylindrischer dosenruempfe
DE69008347T2 (de) * 1990-06-28 1994-08-04 Emerson Electric Co Rillenwalzvorrichtung.

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US214581A (en) * 1879-04-22 Improvement in machines for crimping and tapering stove-pipes
US1399383A (en) * 1921-12-06 Ferdinand heck
US1436489A (en) * 1919-10-16 1922-11-21 Ferrier Walter Nose-forming machine
US1873164A (en) * 1930-01-06 1932-08-23 Guide Lamp Corp Manufacture of sheet metal ware
US2488015A (en) * 1948-06-04 1949-11-15 Ingram Clyde Wilmer Pipe cutting, crimping, and beading machine
US2809687A (en) * 1955-06-02 1957-10-15 Gifford Hill Western Roller apparatus for beading thin wall pipe
US2925116A (en) * 1956-06-25 1960-02-16 William J Eberle Method of and apparatus for producing flexible boot flashing
US3010506A (en) * 1959-04-06 1961-11-28 William Wallace Company Method and apparatus for providing a thread-like coupling bead on thinwalled pipe
US3498245A (en) * 1966-02-24 1970-03-03 Continental Can Co Flexing and spin flanging of can body edges
US3688538A (en) * 1969-10-24 1972-09-05 American Can Co Apparatus for necking-in and flanging can bodies
US3648503A (en) * 1970-03-27 1972-03-14 Veeder Industries Inc Beading machine and method

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831416A (en) * 1973-01-04 1974-08-27 United Can Co Necking die assembly with internal rollers
US3874209A (en) * 1973-05-04 1975-04-01 Fmi Mecfond Aziende Mecc Apparatus for simultaneously tapering and flanging the bodies of cylindrical metal cans
US3913366A (en) * 1974-05-10 1975-10-21 Gulf & Western Mfg Co Apparatus for necking-in can bodies
US3953995A (en) * 1975-05-27 1976-05-04 Haswell John W Means for making double groove pulleys
US4070888A (en) * 1977-02-28 1978-01-31 Coors Container Company Apparatus and methods for simultaneously necking and flanging a can body member
US4341103A (en) * 1980-09-04 1982-07-27 Ball Corporation Spin-necker flanger for beverage containers
WO1984002667A1 (en) * 1982-12-30 1984-07-19 Metal Box Plc Forming necks on hollow bodies
EP0113248A3 (en) * 1982-12-30 1984-08-22 Metal Box Public Limited Company Forming necks on hollow bodies
GB2142561A (en) * 1982-12-30 1985-01-23 Metal Box Plc Forming necks on hollow bodies
US4606207A (en) * 1982-12-30 1986-08-19 Metal Box Public Limited Company Forming necks on hollow bodies
US4838064A (en) * 1987-05-13 1989-06-13 Lanico-Maschinenbau Otto Niemsch Gmbh Apparatus for flanging and swaging a cylindrical can body on both ends
US4927043A (en) * 1987-11-13 1990-05-22 Ihly Industries, Inc. Necked-down can having a false seam and an apparatus to form same
US4870847A (en) * 1988-05-20 1989-10-03 Ihly Industries, Inc. Method and apparatus for forming outwardly projecting beads on cylindrical objects
EP0402511A1 (de) * 1989-06-16 1990-12-19 RMG Beierling GmbH Vorrichtung zum Einziehen von Blechzylindern, insbes. Fassmänteln
US5121621A (en) * 1991-02-20 1992-06-16 Ihly Industries, Inc. Preformed flange reforming process and apparatus
EP0507380A1 (en) * 1991-04-03 1992-10-07 THOMASSEN & DRIJVER-VERBLIFA N.V. Device for forming a constriction on the open end zone of a metal can
US5372028A (en) * 1991-04-03 1994-12-13 Thomassen & Drijver-Verblifa N.V. Device for forming a construction on the open end zone of a metal can
US5150595A (en) * 1991-05-09 1992-09-29 Ihly Industries, Inc. Process and apparatus for working an edge portion of a container flange
US5282375A (en) * 1992-05-15 1994-02-01 Reynolds Metals Company Spin flow necking apparatus and method of handling cans therein
US5245848A (en) * 1992-08-14 1993-09-21 Reynolds Metals Company Spin flow necking cam ring
US5349836A (en) * 1992-08-14 1994-09-27 Reynolds Metals Company Method and apparatus for minimizing plug diameter variation in spin flow necking process
US5279143A (en) * 1993-01-15 1994-01-18 Victaulic Company Of America Self-tracking roll for grooving thin walled pipe
WO1996035529A1 (de) * 1995-05-13 1996-11-14 Krupp Kunststofftechnik Gmbh Verfahren zur bildung eines geneckten und gebördelten abschnitts an einem zylindrischen hohlkörper und vorrichtung zum durchführen des verfahrens
US5857369A (en) * 1996-12-04 1999-01-12 Fang; Jui-Hwa Method for fabricating light weight pipe connectors
US6058753A (en) * 1997-12-10 2000-05-09 Crown Cork & Seal Technologies Corporation Can base reforming
US6457226B1 (en) 1998-09-03 2002-10-01 Guido-Michael Krehle Process for beading sheet metal parts in a beading machine
US7251974B2 (en) * 2000-07-21 2007-08-07 Johan Massee Method and forming machine for deforming a hollow workpiece
US7174759B2 (en) 2000-07-21 2007-02-13 Johan Massee Forming machine and method for deforming a hollow workpiece
US20030167815A1 (en) * 2000-07-21 2003-09-11 Johan Massee Method and forming machine for deforming a hollow workpiece
US20030172701A1 (en) * 2000-07-21 2003-09-18 Johan Massee Forming machine and method for deforming a hollow workpiece
US6776018B2 (en) 2001-07-13 2004-08-17 Emerson Electric Co. Roll grooving apparatus
US6606893B2 (en) 2001-07-13 2003-08-19 Emerson Electric Co. Roll grooving apparatus
US6591652B1 (en) 2001-07-13 2003-07-15 Emerson Electric Co. Roll grooving apparatus
CN103639308A (zh) * 2013-12-10 2014-03-19 合肥亚辰机械制造有限公司 洗衣机内桶缩口加工成型工艺
CN103639309A (zh) * 2013-12-10 2014-03-19 合肥亚辰机械制造有限公司 洗衣机内桶缩口机
CN108909019A (zh) * 2018-08-08 2018-11-30 华北理工大学 纤维板桶封底设备
CN108909019B (zh) * 2018-08-08 2024-03-08 华北理工大学 纤维板桶封底设备
CN113414597A (zh) * 2021-06-22 2021-09-21 鑫磊压缩机股份有限公司 一种储气罐罐体缩口装置、设备和生产线

Also Published As

Publication number Publication date
CA991025A (en) 1976-06-15
DE2321624B2 (de) 1976-12-09
DE2321624A1 (de) 1973-11-29
GB1397512A (en) 1975-06-11
FR2184920A1 (enrdf_load_stackoverflow) 1973-12-28
FR2184920B1 (enrdf_load_stackoverflow) 1976-11-12
SU919606A3 (ru) 1982-04-07
JPS4954265A (enrdf_load_stackoverflow) 1974-05-27
IT983035B (it) 1974-10-31

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