EP0647487A1 - Vorrichtung zum Herstellen eines Wulstes - Google Patents

Vorrichtung zum Herstellen eines Wulstes Download PDF

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Publication number
EP0647487A1
EP0647487A1 EP94307019A EP94307019A EP0647487A1 EP 0647487 A1 EP0647487 A1 EP 0647487A1 EP 94307019 A EP94307019 A EP 94307019A EP 94307019 A EP94307019 A EP 94307019A EP 0647487 A1 EP0647487 A1 EP 0647487A1
Authority
EP
European Patent Office
Prior art keywords
tool
holder head
rollers
base
common axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP94307019A
Other languages
English (en)
French (fr)
Inventor
Jean Bernard Desruelle
Pierre Gorgeon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Crown European Holdings SA
Original Assignee
CarnaudMetalbox SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CarnaudMetalbox SA filed Critical CarnaudMetalbox SA
Publication of EP0647487A1 publication Critical patent/EP0647487A1/de
Ceased legal-status Critical Current

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Classifications

    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/12—Edge-curling
    • 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
    • B21D51/2623—Curling

Definitions

  • the invention relates to a machine for forming a curl at the end of a metal cylindrical element, for example a can body.
  • a machine for forming a curl at the end of a metal cylindrical element for example a can body.
  • the machine enables a curl of small size to be formed on such a cylindrical element, even if the latter is made from thin sheet steel which is typically difficult to work, such as for example "double reduced" steel.
  • the invention concerns a new curling technique allowing the force necessary for realising the curl to be reduced very considerably. It thus allows a curl of much smaller diameter to be obtained.
  • a machine for forming a curl at the end of a metal cylindrical element such as, for example, a can body, comprising a base onto which in use the element fits and a tool-holder head for covering the end of the element end, the base and the tool-holder head assuming a common axis and being spaced from one another, and means for bringing about a controlled axial drawing together of the base and the tool-holder head, characterised in that the machine further comprises rotating means for driving the tool-holder head or the base around the common axis and in that the tool-holder head is provided with a plurality of rollers arranged in a circle and concentrically to the common axis, each provided with a curling groove and mounted in free rotation along approximately coplanar axes, perpendicular to and cutting the common axis.
  • each roller is mounted so as to be moveable along the direction of its own axis of rotation within a predetermined clearance of the order of a tenth of a millimetre. This clearance allows a self-centering of the rollers when these enter into contact with the edge to be curled.
  • the rollers are distributed unevenly in a circle. This particular feature makes it possible to prevent the cylindrical element losing its cylindrical shape (which would result in a shape presenting faintly delineated longitudinal facettes) at the moment when the rollers enter into contact with the edge to be curled.
  • the curl forming machine comprises a base 11 and a tool-holder head 12 which have a common axis 13, here a vertical axis, and being arranged at a certain axial distance from one another. This distance is obviously a function of the height of the cylindrical element 14 which has to be inserted between the base and the tool-holder head.
  • the base 11 comprises, for this purpose, a cylindrical portion 11a adapted to the inside diameter of the element 14 and a shoulder 15 on which it can rest.
  • the machine is provided with means for bringing about the controlled axial displacement between the base 11 and the tool-holder head 12. These means are represented here by a controlled jack 16, on which the base 11 is mounted.
  • the machine is also provided with rotating means 18 for driving the tool-holder head 12, represented by an electric motor 19 and a toothed gearing 20.
  • the rotary driving means could be connected to the base 11 and/or the jack could be coupled to the tool-holder head 12.
  • the tool-holder head 12 is provided with several rollers 22 arranged in a circle (figure 2) and concentrically to the axis 13.
  • Each roller 22 is provided with a curling groove 23 with a suitable profile.
  • the rollers 22 are mounted in free rotation along approximately coplanar axes, extending radially, that is to say perpendicularly to the axis 13 and cutting this at the same point. All the grooves 23 are therefore approximately tangent to a circle, the centre of which is situated on the axis 13 and the radius of which corresponds to that of the cylindrical element 14 on which one wishes to form the curl.
  • the rollers 22 are arranged in an annular hollow 25 opening onto a lower face of the tool-carrier head 12 and including an annular needle bearing 26.
  • the rollers are mounted in this hollow in such a way as to be supported against the needle bearing, at least during the stage of forming the curl. More precisely, the rollers 22 are inserted freely into radial notches 28 of a retaining ring 29 mounted in the annular hollow 25 and fixed to the tool-holder head. This ring is reduced in thickness in its outer part (figure 3) in order to define the shoulder 24 allowing the insertion and the holding of the needle bearing 26.
  • Another ring 30, of greater diameter than that of the ring 29, is fixed to the tool-holder head in the hollow 25 and allows the rollers to be immobilised radially. It has to be noted that the radial distance separating the two rings 29, 30 is determined in order that each roller is mounted with a predetermined clearance along the direction of its own axis of rotation. This clearance is of the order of a tenth of a millimetre for an element 14 having a diameter of the order of about ten centimetres. One thus obtains a self-centering of the rollers relative to the edge of the element 14 at the moment of the formation of the curl.
  • the tool-holder head 12 comprises an annular guide 32 centred on the common axis 13 and placed in the vicinity of the arrangement of rollers.
  • This guide comprises a flat annular face 33 situated opposite and at a slight distance from the rollers 22, which allows them to be held in the notches 28.
  • the guide 32 in addition comprises a tapered part 34 and a cylindrical part 35 of slightly larger diameter than the outside diameter of the tubular element 14. This cylindrical part 35 is therefore situated in the vicinity of the assembly of grooves 23 and the rollers 22.
  • the annular guide is mounted on the tool-holder head 12, at the lower part of this, via a bearing 38 or similar. The outer edge of this ball bearing is clamped between the ring 29 inserted in the hollow 25 and another ring 39 fixed to the tool-holder head 12.
  • the rollers 22 are distributed unevenly in a circle.
  • the radial notches 28 are themselves spaced unevenly in a circle at the outer part of the ring 29 as seen in figure 2.
  • each notch 28 is offset angularly from one neighbouring notch by an angle of 35° and from the other neighbouring notch by an angle of 25°.
  • twelve rollers have been provided, thus distributed in a circle.
  • this arrangement of rollers makes it possible to avoid the tubular element 14 losing its cylindrical shape at the moment when the rollers enter into contact with the edge to be curled.
  • the operation is straight forward and clearly follows from the foregoing description.
  • the tubular element 14 is placed on the base 11, preferably by automatic mechanical means not represented.
  • a clamping system arranged in the base, is applied against the inside wall of the cylindrical element 14 and firmly connects the element to the base 11.
  • the jack 16 and the tool-holder head 12 are moved to engage the edge to be curled in the guide 32 and then in the assembly of grooves 23 of the rollers 22 which are driven into rotation.
  • the position of the grooves 23 of the rollers is such that the edge to be curled enters into contact with the wall of each groove in the vicinity of the outer edge of the latter.
  • the grooves being arranged in such a way that the edge of the tubular element enters into contact with each groove in the vicinity of the inner edge of the latter.
  • the difference in diameter between the cylindrical part 35 of the guide 32 and the tubular element 14 is a little bigger so as not to hinder the disengagement of the said tubular element after the formation of the curl.
  • the curl is formed progressively through rotation of the tool-holder head and simultaneous drawing together between the tool-holder head and the base.
  • the curl is achieved in one complete revolution at most.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP94307019A 1993-10-11 1994-09-26 Vorrichtung zum Herstellen eines Wulstes Ceased EP0647487A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9312062 1993-10-11
FR9312062A FR2711080B1 (fr) 1993-10-11 1993-10-11 Machine de formation d'un roulé à l'extrémité d'un élément tubulaire métallique.

Publications (1)

Publication Number Publication Date
EP0647487A1 true EP0647487A1 (de) 1995-04-12

Family

ID=9451702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94307019A Ceased EP0647487A1 (de) 1993-10-11 1994-09-26 Vorrichtung zum Herstellen eines Wulstes

Country Status (2)

Country Link
EP (1) EP0647487A1 (de)
FR (1) FR2711080B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8761470B2 (en) 2008-10-29 2014-06-24 Koninklijke Philips N.V. Analyzing an at least three-dimensional medical image

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE930808C (de) * 1952-11-28 1955-07-25 Eisen & Stahlind Ag Vorrichtung zum Anfalzen der Boeden und zum Bordieren von Buechsenzargen od. dgl.
DE1452602A1 (de) * 1963-04-17 1969-03-27 Continental Can Co Verfahren und Vorrichtung zum Erzeugen eines Boerdelrandes an gegebenenfalls eine Laengsnaht aufweisenden rohrfoermigen Blechkoerpern,insbesondere Dosenruempfe
GB2092492A (en) * 1981-02-05 1982-08-18 American Can Co Improvements relating to can manufacture
US4435969A (en) * 1981-06-02 1984-03-13 Ball Corporation Spin-flanger for beverage containers
US5165267A (en) * 1990-05-22 1992-11-24 Matsushita Electric Industrial Co., Ltd. Curling apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE930808C (de) * 1952-11-28 1955-07-25 Eisen & Stahlind Ag Vorrichtung zum Anfalzen der Boeden und zum Bordieren von Buechsenzargen od. dgl.
DE1452602A1 (de) * 1963-04-17 1969-03-27 Continental Can Co Verfahren und Vorrichtung zum Erzeugen eines Boerdelrandes an gegebenenfalls eine Laengsnaht aufweisenden rohrfoermigen Blechkoerpern,insbesondere Dosenruempfe
GB2092492A (en) * 1981-02-05 1982-08-18 American Can Co Improvements relating to can manufacture
US4435969A (en) * 1981-06-02 1984-03-13 Ball Corporation Spin-flanger for beverage containers
US5165267A (en) * 1990-05-22 1992-11-24 Matsushita Electric Industrial Co., Ltd. Curling apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8761470B2 (en) 2008-10-29 2014-06-24 Koninklijke Philips N.V. Analyzing an at least three-dimensional medical image

Also Published As

Publication number Publication date
FR2711080B1 (fr) 1995-12-22
FR2711080A1 (fr) 1995-04-21

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