EP0205992B1 - Verfahren und Vorrichtung zum Runden von Blechen, insbesondere für Dosenkörper - Google Patents

Verfahren und Vorrichtung zum Runden von Blechen, insbesondere für Dosenkörper Download PDF

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Publication number
EP0205992B1
EP0205992B1 EP86107402A EP86107402A EP0205992B1 EP 0205992 B1 EP0205992 B1 EP 0205992B1 EP 86107402 A EP86107402 A EP 86107402A EP 86107402 A EP86107402 A EP 86107402A EP 0205992 B1 EP0205992 B1 EP 0205992B1
Authority
EP
European Patent Office
Prior art keywords
bending roll
sheet
rolls
bending
front edge
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.)
Expired - Lifetime
Application number
EP86107402A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0205992A3 (en
EP0205992A2 (de
Inventor
Wolfgang Weil
Josef Locher
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.)
Elpatronic AG
Original Assignee
Elpatronic AG
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 Elpatronic AG filed Critical Elpatronic AG
Publication of EP0205992A2 publication Critical patent/EP0205992A2/de
Publication of EP0205992A3 publication Critical patent/EP0205992A3/de
Application granted granted Critical
Publication of EP0205992B1 publication Critical patent/EP0205992B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
    • B21D5/143—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers making use of a mandrel
    • 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
    • B21D51/2676—Cans or tins having longitudinal or helical seams

Definitions

  • the invention relates to a method for rounding sheets, in particular for can bodies, each with a leading and trailing edge, which are then connected to one another, in particular welded, in which each sheet, with its leading edge leading, runs between a driven bending roller and a plurality of support rollers and , assisted by at least one additional shaping element arranged behind the bending roller, around which the bending roller is bent, the approximately completely rounded sheet being bent up elastically in order to keep the leading edge away from the bending roller or the support rollers while the trailing edge runs between them.
  • the invention further relates to an apparatus for performing this method.
  • a conveyor station consisting of two rollers and two sliding pieces, between which the sheets are fed, is followed by a pre-bending station, which has a pair of rollers and a wedge-shaped one in front and one behind Bending body has. Behind it are two also wedge-shaped, converging shaped pieces, which individually guide the sheets into a nip between an upper and a lower bending roll. A further wedge-shaped shaped piece is arranged behind the roll nip, which deflects the sheet emerging from the nip downward, so that it lies around the lower bending roll.
  • the lower of the two fittings located in front of the nip is hook-shaped so that it catches the leading edge of the sheet and so that it catches and holds the leading edge of the sheet while the rear portion of the sheet still passes between the bending rolls. This prevents the front edge of the sheet from running into the nip again; the resulting cylindrical sheet metal body is bent up until the rear edge of the sheet has passed between the two bending rollers and then comes to a standstill against the shaped piece arranged behind the nip.
  • Conveyor pawls are arranged below the shaped pieces, which finally push the cylindrical sheet metal body axially away from the bending rollers into a guide with two grooves, in which the front and rear edges of the sheet are guided in such a way that they can be welded behind one another in an overlapping manner.
  • This known device and the method which can be carried out with it generally have useful results if the diameter of the rounded sheet metal body or frame is very large in relation to the sheet thickness and the demands on the precise rounding of the sheet metal body, particularly in the area of its leading edge, are not too high be put.
  • the invention is therefore based on the object of developing a method of the type described at the outset and a device suitable for carrying out the method in such a way that the radius of curvature of the rounded sheet metal bodies in the region of the front and rear edges corresponds more precisely to the intended radius of curvature, and this also then, if can bodies with a relatively small diameter are produced from relatively thick sheet metal.
  • the object is achieved according to the invention in that when the driven bending roller continues to rotate, the elastically bent sheet metal relaxes again and the leading edge then runs again between the bending roller and the support rollers to the rear edge.
  • the front edge of the already largely rounded sheet metal body is not finally caught in front of the nip formed between the bending roller and the backup rollers, which it has already passed, but is held back until it no longer fits into the rear one Edge area of the sheet can overlap position.
  • the front area of the sheet is released again so that it runs again, with its front edge more or less closely behind the rear edge, between the bending roller and the support rollers and thereby obtains a radius of curvature that is better adapted to the diameter of the finished sheet metal body.
  • the front edge of the finished rounded sheet metal which has run between the bending roller and the support rollers for the second time, can be caught and that Sheet metal are pushed axially away from the bending roller into a guide in which the front and rear edges are brought into a position in which they are connected to one another, in particular welded.
  • These - apart from the second pass through the front edge of the sheet - method features can be further developed according to the invention in such a way that the front edge is caught only after it has been connected to the second pass between the bending roll and the support rolls and also between at least one additional shaping element and the bending roll has run through it twice. This further improves the shape accuracy of the rounded sheet in the area adjoining its front edge.
  • the procedure described last can be perfected in that the sheet, starting with the first pass of its leading edge between the bending roll and the support rolls, under the action of the at least one additional shaping element, a path of approximately 420 ° to 480 ° , preferably 440 ° to 460 ° to run the bending roller.
  • the sheet is freed from the action of any additional shaping element after it has completed its rotation around the bending roll, it is moved from the rounding station into the positioning station, rotated further and its front edge is only caught after approximately two full rotations.
  • the rounded sheet can be brought particularly precisely into a defined position, in which it can then be prepared for further processing, in particular for butt welding its front and rear edges.
  • a sheet metal round device is particularly suitable for carrying out the method according to the invention, which corresponds to a device known from US Pat. No. 3,117,214 in that it has several with a feed section for feeding flat sheets, a bending roll arranged on one side of the feed section support rollers arranged on the other side of the feed path and at least one additional shaping element arranged in the feed direction behind the support rollers for bending the metal sheets around the circumference of the bending roller, a deflection body being provided which can be moved at least approximately radially away from the bending roller.
  • such a device is further developed in that the deflecting body has a crescent-shaped cross section, its concave side is adapted to the bending roller and, at least approximately, rests against it when it is in its rest position.
  • the sheet can be smoothly moved away during rounding until its front edge has again approached the nip between the bending roll and the support rolls to such an extent that the front area of the sheet must be deflected away from the roll by the intended movement of the deflecting body.
  • the at least one additional shaping element arranged behind the bending roller or the supporting rollers is resiliently supported at least approximately radially with respect to the bending roller and has a pressure roller. This makes it possible to exert considerable, radial forces with respect to the bending roller on the sheet metal without the movement of the latter around the bending roller being opposed to any appreciable resistance.
  • a plurality of pressure rollers in different directions are arranged resiliently on a common support, which as a whole is adjustable towards and away from the bending roller.
  • the device shown serves the purpose of rounding flat, rectangular sheets 10 of tinplate, for example 0.3 mm thick, to form can bodies, for example 40 mm in diameter.
  • the sheets 10 each have a leading edge 10a and a trailing edge 10b, which after rounding should be arranged parallel to one another at a short distance; the curve should extend as evenly as possible up to these two edges 10a and 10b.
  • the device shown has a feed section 12 with an insertion station 14, into which the sheets 10 are individually inserted.
  • the upper strand of a conveyor chain 16 extends below the insertion station 14 and can be driven step by step by a drive shaft 18 and has drivers 20 at intervals corresponding to the length of the sheets.
  • Parallel guide rails 22, which guide the sheets 10 to both sides and up and down, extend from the insertion station 14 to a nip between two horizontal transport rollers 24 and 26 arranged vertically one above the other.
  • the upper transport roller 26 is adjustable on a vertically adjustable one , elastically preloaded downward transport roller carrier 28 stored. Both transport rollers 24 and 26 can be driven by a motor, not shown, via a gear 30, to which the drive shaft 18 is also connected.
  • a bending roller 32 and a plurality of support rollers 34 are arranged behind the transport rollers 24 and 26, the axes of rotation of which are likewise arranged horizontally and parallel to one another, but in such a way that the plane defined by them converges upwards with the vertical plane in which the axes of rotation of the two transport rollers 24 and 26 lie.
  • the bending roller 32 is referred to as a bending roller because the sheet 10 is rolled around it; this bending roller 32, like the lower transport roller 24, is mounted in a stationary manner and rotates in the same direction as this from the gear 30 drivable.
  • the outer support rollers 34 have a considerably smaller diameter than the bending roller 32 and are mounted on a roller carrier 36 which can be adjusted radially to the bending roller 32 in accordance with the properties of the sheet 10, in particular the sheet thickness.
  • a carrier 38 is guided on a stationary guide 40 which extends horizontally and transversely to the bending roller 32 and the support rollers 34.
  • the carrier 38 is biased by a spring 42 which tends to pull it away from the inner bending roll 32;
  • This spring 42 is opposed by eccentrics 44 which are fastened to a shaft 46 which can be driven by the gear 30 and which can be rolled on a roller 48 mounted on the carrier 38.
  • a shaping element 50 is pivotally mounted on the carrier 38, on which a pressure roller 52 is supported coaxially.
  • the shaping element 50 is adjustable and elastically pretensioned in such a way that the pressure roller 52 strives to roll on the bending roller 32.
  • Two further shaping elements 54 are displaceably guided on the carrier 38 approximately radially to the inner bending roller 32, on which pressure rollers 56 are mounted, the diameter of which corresponds approximately to that of the support rollers 34 and is considerably smaller than the diameter of the pressure roller 52.
  • the shaping elements 54 can also be adjusted in this way biased that the pressure rollers 56 strive to roll on the bending roller 32.
  • a cam disk 58 which controls an angle lever 60, is fastened on the drive shaft 18.
  • an elongated deflecting body 62 which is arranged parallel to the bending roller 32 and has a crescent-shaped cross section, is fastened.
  • the deflecting body 62 is shown in FIGS. 2 and 4 in a rest position in which it bears at least approximately on the lateral surface of the bending roller 32; 3, the deflecting body 62 can be moved essentially radially away from the bending roller 32 in the direction of the lower transport roller 24.
  • a pivotable bearing block 64 is also controlled by the cam disk 58, on which a support roller 66 is supported to support the bending roller 32.
  • a group of hook-shaped catch levers 68 is mounted so as to be pivotable about a stationary axis 70, approximately opposite the support roller 66 with respect to the bending roller 32.
  • the catch levers are controlled by cams 72 which are fastened on the shaft 46.
  • a path 74 is formed parallel to the axis of the bending roller 32 and below it, on which pivotable pawls 76 can be moved back and forth. Also parallel to the axis of the bending roller 34 and in an axial continuation, in FIG. 1 facing the viewer, a guide 78 is arranged which has a groove 80 and 82 on each of its two sides and thereby has an approximately Z-shaped profile.
  • the device described works as follows: During each working cycle of the device, a sheet 10 is conveyed from the insertion station 14 to the transport rollers 24, 26 and is grasped by them. In the next working cycle, the sheet 10 is transported by the transport rollers 24, 26 to the bending roller 32 and the support rollers 34, gripped by the pressure roller 52 and bent around the bending roller 32.
  • the deflecting body 62 initially assumes the rest position shown in FIG. 2, in which the sheet 10 runs onto the deflecting body 62 during rounding. Immediately thereafter, the deflection body 62 is moved from its rest position according to FIG. 2 into its position according to FIG. 3, which is distant from the bending roller 32.
  • the front edge 10a of the sheet 10 is prevented from bumping against the rear area of the sheet and, together with the latter, entering the gap between the bending roll 32 and the support rolls 34.
  • the deflecting body 62 is moved back into its rest position, so that the front edge 10a of the sheet 10 now again in the gap between the bending roller 32 and the support rollers 34 and passes through this and the gap between the bending roller 32 and the first pressure roller 52.
  • the rounding operation is considered complete and the carrier 38 is moved away from the bending roller 32, so that all pressure rollers 52 and 56 lose contact with the sheet 10 as shown in FIG. 4 .
  • the sheet 10 is then pushed from a round station 31 with a pawl 76 into a positioning station 69.
  • the sheet metal 10 is then rotated further by continuing to drive the bending roller 32 until the hook-shaped catch levers 68 engage in the gap which has remained open between the front edge 10a and the rear edge 10b of the sheet metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP86107402A 1985-06-11 1986-05-31 Verfahren und Vorrichtung zum Runden von Blechen, insbesondere für Dosenkörper Expired - Lifetime EP0205992B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2457/85A CH669130A5 (de) 1985-06-11 1985-06-11 Verfahren und vorrichtung zum runden von blechen, insbesondere fuer dosenkoerper.
CH2457/85 1985-06-11

Publications (3)

Publication Number Publication Date
EP0205992A2 EP0205992A2 (de) 1986-12-30
EP0205992A3 EP0205992A3 (en) 1987-09-23
EP0205992B1 true EP0205992B1 (de) 1990-04-04

Family

ID=4234255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86107402A Expired - Lifetime EP0205992B1 (de) 1985-06-11 1986-05-31 Verfahren und Vorrichtung zum Runden von Blechen, insbesondere für Dosenkörper

Country Status (13)

Country Link
US (1) US4726210A (ja)
EP (1) EP0205992B1 (ja)
JP (1) JPS61286028A (ja)
BR (1) BR8602698A (ja)
CA (1) CA1266606A (ja)
CH (1) CH669130A5 (ja)
DE (2) DE3523608A1 (ja)
DK (1) DK275386A (ja)
ES (1) ES8703307A1 (ja)
FI (1) FI88003C (ja)
GB (1) GB2176139B (ja)
GR (1) GR861494B (ja)
ZA (1) ZA864293B (ja)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE85961T1 (de) * 1987-05-15 1993-03-15 Australian Wool Corp Beseitigungsvorrichtung von spannbaendern durch aufwickeln.
CH680714A5 (ja) * 1989-08-22 1992-10-30 Elpatronic Ag
US5555759A (en) * 1994-01-12 1996-09-17 Wilson Tool International, Inc. Workpiece-deforming tool and die for use in a punch press
US5575168A (en) * 1994-01-12 1996-11-19 Wilson Tool International, Inc. Workpiece-deforming tool and die for use in a punch press
US5531008A (en) * 1995-06-07 1996-07-02 Eastman Kodak Company Method and apparatus for making a bubble spring assembly
FI120485B (fi) 1998-05-29 2009-11-13 Lamican Oy Pakkauksenmuodostuslaite
FI981219A (fi) * 1998-05-29 1999-11-30 Upm Kymmene Corp Menetelmä ja pakkauskone täytetyn pakkauksen muodostamiseksi, aihiomateriaaliraina ja täytetty pakkaus
DE19835389A1 (de) * 1998-08-05 2000-04-20 Wolfgang Linnenbrink Verfahren und Rollvorrichtung zur Herstellung zylindrischer Blechmäntel
DE102007018387B4 (de) * 2007-04-17 2014-09-04 Weil Engineering Gmbh Durchlaufschweißmaschine zum Verschweißen eines Rohrrohlings
DE602007001520D1 (de) * 2007-04-20 2009-08-20 Fata Fab App Sollevamento Haspelvorrichtung für eine Walzanlage
US20080271509A1 (en) * 2007-05-01 2008-11-06 R&Y Enterprises, Llc Computer controlled flexible rolling machine
TW200940198A (en) * 2008-03-27 2009-10-01 Rachata Leelaprachakul Processes for textured pipe manufacturer
JP4439573B2 (ja) * 2008-07-29 2010-03-24 株式会社富士機械工作所 円筒成形装置
US8561445B2 (en) * 2008-10-21 2013-10-22 Smi & Hydraulics, Inc. Rounding system and method used in the manufacture of wind towers
US9452464B2 (en) * 2011-07-06 2016-09-27 Federal-Mogul Corporation Method of forming a tubular member
US10361412B2 (en) 2013-02-26 2019-07-23 Nissan Motor Co., Ltd. Method and apparatus for forming thin-board-like base material
CN105363847A (zh) * 2015-12-05 2016-03-02 重庆创隆实业有限公司 钢圈卷圆装置

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
BE405755A (ja) *
US2197906A (en) * 1939-05-01 1940-04-23 Buffalo Forge Co Method and machine for forming metal
US2309963A (en) * 1940-03-13 1943-02-02 Bliss E W Co Apparatus for making can bodies
US2675849A (en) * 1949-08-26 1954-04-20 Budd Co Machine for coiling wheel rim stock or the like
US2698642A (en) * 1952-09-23 1955-01-04 Malina Frank Metal strip bending machine
US3117214A (en) * 1961-06-12 1964-01-07 American Can Co Body maker and method
DE2110260C3 (de) * 1971-03-04 1980-07-31 Emil Rudolf Erich 4300 Essen Barth Einrichtung zum Biegen von Blech und dgl
US3738149A (en) * 1971-10-01 1973-06-12 B Archer Pipe forming apparatus and method
US3934324A (en) * 1975-02-14 1976-01-27 Grotnes Machine Works, Inc. Method and apparatus for forming automotive wheel rim blanks
US4133197A (en) * 1977-08-29 1979-01-09 Carando Machine Works Roll-type machine for forming cylindrical sheet metal bodies
FR2411647A1 (fr) * 1977-12-19 1979-07-13 Jammes Sa Anc Ets Dispositif permettant d'immobiliser en positions constantes les deux generatrices de jonction d'une virole, sur machine a cintrer les metaux en feuille
FR2517226A1 (fr) * 1981-11-30 1983-06-03 Floquet Monopole Perfectionnements aux procedes et dispositifs de fabrication des segments d'etancheite pour pistons
IT8249012A0 (it) * 1982-08-20 1982-08-20 Fmi Mecfond Aziende Mecc Saldatrice elettrica a resistenza per corpi scatolari con mezzi perfezionati per la calandratura della fascetta metallica, e il trasporto dei corpi calandrati fino alla stazione di saldatura

Also Published As

Publication number Publication date
GB8612338D0 (en) 1986-06-25
FI88003C (fi) 1993-03-25
ES555951A0 (es) 1987-03-01
GB2176139A (en) 1986-12-17
ZA864293B (en) 1987-02-25
US4726210A (en) 1988-02-23
ES8703307A1 (es) 1987-03-01
FI862374A (fi) 1986-12-12
EP0205992A3 (en) 1987-09-23
FI862374A0 (fi) 1986-06-04
JPH034283B2 (ja) 1991-01-22
CA1266606A (en) 1990-03-13
DK275386D0 (da) 1986-06-11
JPS61286028A (ja) 1986-12-16
DK275386A (da) 1986-12-12
FI88003B (fi) 1992-12-15
DE3670014D1 (de) 1990-05-10
GR861494B (en) 1986-10-10
CH669130A5 (de) 1989-02-28
GB2176139B (en) 1989-04-05
EP0205992A2 (de) 1986-12-30
DE3523608A1 (de) 1986-12-11
BR8602698A (pt) 1987-02-10

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