EP0446089B1 - Verfahren und Vorrichtung zum Formen einer kreisförmigen Lippe um eine Öffnung - Google Patents

Verfahren und Vorrichtung zum Formen einer kreisförmigen Lippe um eine Öffnung Download PDF

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Publication number
EP0446089B1
EP0446089B1 EP91400409A EP91400409A EP0446089B1 EP 0446089 B1 EP0446089 B1 EP 0446089B1 EP 91400409 A EP91400409 A EP 91400409A EP 91400409 A EP91400409 A EP 91400409A EP 0446089 B1 EP0446089 B1 EP 0446089B1
Authority
EP
European Patent Office
Prior art keywords
roller
axis
opening
lip
rollers
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
EP91400409A
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English (en)
French (fr)
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EP0446089A1 (de
Inventor
Yves Fournier
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.)
Areva NP SAS
Original Assignee
Framatome SA
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Filing date
Publication date
Application filed by Framatome SA filed Critical Framatome SA
Publication of EP0446089A1 publication Critical patent/EP0446089A1/de
Application granted granted Critical
Publication of EP0446089B1 publication Critical patent/EP0446089B1/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
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
    • B21C37/29—Making branched pieces, e.g. T-pieces
    • B21C37/292—Forming collars by drawing or pushing a rigid forming tool through an opening in the tube wall

Definitions

  • the present invention relates to a method for forming a circular lip around an opening in a wall, in particular a ferrule, of great thickness, the thickness of the lip being relatively small compared to that of the wall, of the type in which a counterbore is machined around the opening, on the side opposite to the lip to be produced, then the metal forming the bottom thereof is pushed axially against a die, on the side opposite the counterbore.
  • the object of the invention is to allow, according to an efficient and economical process, the production of lips that are relatively thin compared to the wall of the shell, the thickness of these lips being typically less than or equal to half the thickness of the wall, maintaining a geometry of the bore close to the cylinder, which allows to keep the most large possible the metal section available in the shell for the reinforcement of the opening.
  • the subject of the invention is a method according to the preamble of claim 1, characterized in that the pushing operation is carried out by means of at least one roller mounted to rotate on an axis and driven in orbital movement around the axis of the opening, the angle that the attack surface of the roller forms with this axis being progressively reduced during at least part of the advance of the roller.
  • said angle reduction is obtained by reducing the angle that the axis of the roller forms with that of the opening, and / or by virtue of a convex profile of the roller.
  • the roller may in particular have a barrel profile or, alternatively, a conical profile.
  • Fig. 1 represents the meridian half-section of a cylindrical shell 1 of vertical axis XX, comprising at least one lateral circular opening 2, of axis YY perpendicular to the axis XX.
  • This opening is delimited by a substantially frustoconical inner surface, slightly converging towards the outside of the shell.
  • This very thick ferrule a can in particular be part of the vessel of a nuclear reactor.
  • the machining of the lip 3 has three phases illustrated in Figs. 2A to 2C respectively: cutting of a circular wafer of diameter b (Fig. 2A), machining on the interior side, around the periphery of the orifice thus obtained, of a counterbore 4 whose depth c is substantially equal to a / 2 (Fig. 2B); and extrusion by pushing back the lip 3 (Fig. 2C).
  • the lip 3 protrudes axially, along the axis YY, by a distance d relative to the external cylindrical wall of the ferrule. At its extremity, it has a radial thickness e and defines an entry opening of diameter f .
  • a 300 mm
  • c 150 mm
  • d 100 to 120 mm
  • e 100 mm
  • f 700 mm
  • the installation used for this operation comprises a ferrule support 5, a support block 6, a burnishing machine 7 and a heater 8.
  • the support 5 consists of a base 9 in which are mounted four rollers 10 of cylindrical shape regularly distributed over a circle C whose diameter corresponds to that of the ferrule and which are oriented radially.
  • the upper generatrix of the rollers 10 slightly exceeds the level of the base 9.
  • the block 6 is fixed on the base 9 outside the circle C, between two rollers 10. It has a cylindrical recess 11 coaxial with the circle C (Fig. 4), receiving a sector of the shell 1 when the latter is placed on the rollers 10. In this recess is formed a cylindrical cavity 12 (Fig. 3) whose axis coincides with the axis YY during the pushing operation described below. The entrance to this cavity 12 is bordered by a circular support matrix 13 whose profile corresponds to the external profile of the lip 3 to be produced.
  • the burnishing machine 7 is entirely disposed inside the circle C. It comprises a frame 14 itself comprising two vertical uprights 15 in a circular opening of which is mounted, slidingly and rotationally, a cylindrical jack body 16 of which the axis ZZ coincides with that of the cavity 12.
  • a first electric motor 17 carried by the frame can drive in rotation, via a gear 18, a thrust screw 19 parallel to the axis XX, quid by the frame 14.
  • This screw acts by means of an end pad 20 on a vertical plate 21, perpendicular to the axis ZZ and guided in translation parallel to this axis, which is freely traversed by the cylinder 16.
  • the system screw-nut can be replaced by a hydraulic or pneumatic double-acting cylinder.
  • the plate 21 constitutes a support for a second electric motor 22 and bears outwards, that is to say towards the block 6, against a flange 23 secured to the cylinder 16, this by means of a bearing with balls 24.
  • the motor 22 comprises an output pinion 25, which meshes with a pinion 26 secured to the cylinder 16.
  • other motor-17-gear 18-screw 19 assemblies can be provided and regularly distributed around the ZZ axis.
  • the cylinder 16 forms a double-acting hydraulic or pneumatic cylinder body in which a piston 27 moves.
  • This body is extended towards the outside by a cylindrical roller carrier 28 consisting of three longitudinal members 29 parallel to the axis ZZ (Fig. 5) and connected at their outer end by a ring 30 (Fig. 3 and 4).
  • Three rollers 31 with a barrel profile are interposed between the longitudinal members 29 (Fig. 5), projecting radially with respect thereto.
  • the axis 12 of each roller converges towards the outside, is located in a plane passing through the axis ZZ and is articulated by its outer end to the crown 30 and by its inner end to the outer end of a respective link 33 which converges inward.
  • Each link 33 is articulated at its inner end on a sliding plate 34 fixed to the end of the piston rod 27.
  • the heater 8 (Fig. 4) is movable and comprises an inner convex part 36 and an outer concave part 37. It can be electric or with gas burners.
  • the device 8 is brought opposite one of the two openings, preheats the latter to approximately 500 ° C., then heats it to the extrusion temperature of the lip 3, between 950 and 1200 ° C.
  • the device 8 is then distant, and the ferrule is rotated around its axis on the rollers 10 until the axis YY of the opening 2 thus heated coincides with the axis ZZ of the matrix 13 and of the cylinder 16.
  • a first forming-extrusion pass of the lip is then carried out by exerting a thrust, of the order of 100 to 1000 tonnes, along the axis ZZ, by means of the motor 17, and by simultaneously rotating the cylinder 16 and the roller carrier 28 around their axis by means of the motor 22.
  • this angle of attack is a function of both the angle of inclination x and the angle made with the axis 32 the tangent to the outer surface of the roller at the point of attack, this angle also varying during the advance of the roller carrier taking into account the barrel shape of the rollers.
  • This process makes it possible to obtain the lip 3 while ensuring the continuity of the fibers of the metal of the ferrule.
  • the central heterogeneous zones of the thickness of the shell do not lead to the bore, which is favorable for the mechanical behavior of the assembly.
  • the connection by welding of pipes to the shell is made on the lips 3, which is advantageous from the point of view of the stresses undergone by the shell.
  • the apparatus 8 can be placed opposite another opening 2 to be machined, as shown in FIG. 4, which reduces the total manufacturing time of the shell.
  • the rollers 31 can be replaced by rollers having a different shape, in particular a frustoconical shape converging towards the outside.
  • the angle of attack of the rollers on the lip in formation depends only on the inclination x of the axes of the rollers.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Processing Of Meat And Fish (AREA)
  • Heat Treatment Of Articles (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Drilling And Boring (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Crushing And Grinding (AREA)

Claims (10)

  1. Verfahren zum Formen einer kreisförmigen Lippe (3) um eine Öffnung (2) einer Wand, insbesondere eines Ringes (1) großer Dicke, wobei die Dicke der Lippe relativ gering im Vergleich zu derjenigen der Wand ist, bei welchem Verfahren eine Kehle (4) um die Öffnung herum von der Seite gegenüber der herzustellenden Lippe ausgearbeitet und an das Metall, das deren Grundlage bildet, von der der Kehle gegenüberliegenden Seite axial gegen eine Matrize gepreßt wird, dadurch gekennzeichnet, daß das Pressen mit Hilfe wenigstens einer Rolle (3) erfolgt. die drehbar auf einer Achse (32) angeordnet und in einer Kreisbewegung um die Achse (X-X) der Öffnung angetrieben ist, wobei der Winkel, den die Angriffsfläche der Rolle mit dieser Achse bildet, nach und nach im Laufe wenigstens eines Teils des Vorschubs der Rolle abnimmt.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Verringerung des Winkels erhalten wird durch Reduzieren des Winkels (x), den die Achse (32) der Rolle mit der Achse (X-X) der Öffnung (2) bildet, und/oder durch ein konvexes Profil der Rolle.
  3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß gleichzeitig mehrere Rollen (31) in Einsatz gebracht werden, die gleichmäßig um die Achse (X-X) der Öffnung (3) verteilt sind.
  4. Einrichtung zum Formen einer kreisförmigen Lippe (3) um eine Öffnung (2) einer Wand herum, insbesondere eines Ringes (1), mit großer Dicke, wobei die Dicke der Lippe relativ gering in bezug auf diejenige der Wand ist, welche Einrichtung umfaßt:
    - einen Rollenträger (28), der mit Mitteln (17 bis 19) zur Verschiebung entlang seiner Achse (Z-Z) ausgerüstet ist;
    - wenigstens eine Rolle (31), die drehbar in einer Achse (32) gelagert ist, die exzentrisch durch den Rollenträger getragen wird;
    - Mitteln (22,25) zum Antreiben der Rollen in einer Kreisbewegung um die Achse (Z-Z) des Rollenträgers;
    dadurch gekennzeichnet, daß die Einrichtung Mittel (27) zum Variieren der Neigung (x) der Achse (32) der Rolle in bezug auf die Achse (Z-Z) des Rollenträgers aufweist.
  5. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Einrichtung im übrigen eine Stützmatrize (13) umfaßt, die in bezug auf den Rollenträger (28) angeordnet ist, wobei das Profil dieser Matrize dem äußeren Profil der herzustellenden Lippe (3) entspricht.
  6. Einrichtung nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß die Rolle (31) ein Tonnenprofil aufweist.
  7. Einrichtung nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß die Rolle ein konisches Profil aufweist.
  8. Einrichtung nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß die Rolle (31) lose auf ihrer Achse (32) angeordnet ist, wobei der Rollenträger (28) mit Mitteln (22,25) zum Antreiben zur Drehung um seine Achse (Z-Z) versehen ist.
  9. Einrichtung nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, daß mehrere Rollen (31) in gleichmäßigen Abständen um die Achse (Z-Z) des Rollenträgers (28) herum vorgesehen sind, wobei die Achsen (32) aller Rollen dieselbe Neigung (x) in bezug auf diese Achse aufweisen.
  10. Einrichtung nach einem der Ansprüche 4 bis 9 zur Herstellung eines Ringes (1), dadurch gekennzeichnet, daß die Einrichtung im übrigen Stützrollen (10) des Ringes mit seiner senkrechten Achse (X-X) umfaßt, welche Stützrollen auf einem Umfang (C) verteilt und radial zu diesem angeordnet sind.
EP91400409A 1990-03-06 1991-02-15 Verfahren und Vorrichtung zum Formen einer kreisförmigen Lippe um eine Öffnung Expired - Lifetime EP0446089B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9002817 1990-03-06
FR9002817A FR2659481A1 (fr) 1990-03-06 1990-03-06 Procede et installation de formage d'une levre circulaire autour d'une ouverture.

Publications (2)

Publication Number Publication Date
EP0446089A1 EP0446089A1 (de) 1991-09-11
EP0446089B1 true EP0446089B1 (de) 1994-05-18

Family

ID=9394426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400409A Expired - Lifetime EP0446089B1 (de) 1990-03-06 1991-02-15 Verfahren und Vorrichtung zum Formen einer kreisförmigen Lippe um eine Öffnung

Country Status (10)

Country Link
US (1) US5129249A (de)
EP (1) EP0446089B1 (de)
JP (1) JP2806644B2 (de)
KR (1) KR100220308B1 (de)
AT (1) ATE105745T1 (de)
CZ (1) CZ285565B6 (de)
DE (1) DE69101994T2 (de)
FR (1) FR2659481A1 (de)
RU (1) RU2004368C1 (de)
SK (1) SK280029B6 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5599472A (en) * 1991-04-05 1997-02-04 The Boeing Company Resealable retort for induction processing of organic matrix composites or metals
US6000263A (en) * 1995-06-05 1999-12-14 Enami Seiki Mfg. Co., Ltd. Branch pipe forming tool and method of forming branch pipe on metal tube with the tool
JPH0957556A (ja) * 1995-06-05 1997-03-04 Enami Seiki:Kk 枝管成形工具およびその工具を用いた金属管の枝管の成形方法
GB2322819B (en) * 1997-03-03 2000-12-13 Usui Kokusi Sangyo Kaisha Ltd Method for improving fatique strength due to repeated pressure at branch hole part in member for high pressure fluid.
US7610786B2 (en) * 2004-12-21 2009-11-03 Nissan Motor Co., Ltd. Apparatus for forming microscopic recesses on a cylindrical bore surface and method of forming the microscopic recesses on the cylindrical bore surface by using the apparatus
CN101804560B (zh) * 2010-03-17 2012-05-09 烟台台海玛努尔核电设备股份有限公司 安全注射箱接管嘴的加工方法
DE102018112845A1 (de) * 2018-05-29 2019-12-05 ATG Automations-Technik Gröditz GmbH & Co. KG Erzeugung eines Abgangs an einem Hohlkörper

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US157810A (en) * 1874-12-15 Improvement in flanging-machines
US18452A (en) * 1857-10-20 Improved machine for bending flanges on boiler-heads
US743644A (en) * 1903-02-27 1903-11-10 Thomas Richard Johnson Flanging-machine.
US1011000A (en) * 1910-02-19 1911-12-05 John S Worth Process for dishing plates.
US1753963A (en) * 1926-11-27 1930-04-08 Ferdinand Braun Method of and apparatus for flanging containers
FR1198440A (fr) * 1958-02-18 1959-12-07 Babcock & Wilcox France Perfectionnements aux enceintes sous pression et procédé de fabrication de tubulures sur de telles enceintes
US3151657A (en) * 1961-03-22 1964-10-06 United Sheet Metal Co Inc Sheet metal forming machines
FR1572835A (de) * 1968-06-25 1969-06-27
FR2337600A1 (fr) * 1976-01-09 1977-08-05 Creusot Loire Procede et installation de fabrication d'une tubulure d'attente sur une paroi de tres forte epaisseur
IT1116912B (it) * 1977-04-04 1986-02-10 Verrina Spa Macchina per la formazione di colletti imbutiti in collettori cilindrici di lamiera anche di grande spessore
FR2409103A1 (fr) * 1977-11-18 1979-06-15 Unicum Sa Outil combine et reversible avec porte-outil pour l'obtention de collerettes sur tuyauteries, ou surfaces planes
US4246772A (en) * 1978-07-19 1981-01-27 Moshnin Evgeny N Pressing branch pipe on thick-walled shell-device for realization thereof
JPS58224024A (ja) * 1982-06-22 1983-12-26 Kotobuki Tekkosho:Kk 多管式熱交換器用管板の溶接フランジ部の形成方法
SU1479158A1 (ru) * 1987-07-06 1989-05-15 Предприятие П/Я В-2739 Устройство дл развальцовки отверсти трубы

Also Published As

Publication number Publication date
CS9100583A3 (en) 1991-10-15
DE69101994D1 (de) 1994-06-23
KR100220308B1 (ko) 1999-09-15
JP2806644B2 (ja) 1998-09-30
DE69101994T2 (de) 1994-11-03
RU2004368C1 (ru) 1993-12-15
US5129249A (en) 1992-07-14
CZ285565B6 (cs) 1999-09-15
JPH04224026A (ja) 1992-08-13
ATE105745T1 (de) 1994-06-15
FR2659481A1 (fr) 1991-09-13
FR2659481B1 (de) 1994-04-22
EP0446089A1 (de) 1991-09-11
SK280029B6 (sk) 1999-07-12

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