EP0284773B1 - Dispositif d'élargissement de fins de tubes - Google Patents

Dispositif d'élargissement de fins de tubes Download PDF

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Publication number
EP0284773B1
EP0284773B1 EP88102680A EP88102680A EP0284773B1 EP 0284773 B1 EP0284773 B1 EP 0284773B1 EP 88102680 A EP88102680 A EP 88102680A EP 88102680 A EP88102680 A EP 88102680A EP 0284773 B1 EP0284773 B1 EP 0284773B1
Authority
EP
European Patent Office
Prior art keywords
tube
mould
cylinder
expansion
die
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
EP88102680A
Other languages
German (de)
English (en)
Other versions
EP0284773A2 (fr
EP0284773A3 (en
Inventor
Erich Büchele
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0284773A2 publication Critical patent/EP0284773A2/fr
Publication of EP0284773A3 publication Critical patent/EP0284773A3/de
Application granted granted Critical
Publication of EP0284773B1 publication Critical patent/EP0284773B1/fr
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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • 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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging

Definitions

  • the innovation relates to a device for expanding pipe ends according to the preamble of claim 1.
  • a device for expanding pipe ends according to the preamble of claim 1.
  • Such a device has already become known from US-A-2394841.
  • DE-A-1 918 815 describes a device in which a wedge-shaped punch is arranged at the end of a piston. With the cylinder of the piston a holder is connected, which consists of wedge pieces, which lie against the outer wall of the pipe at a distance from the pipe end.
  • a disadvantage of this known device is that when the punch is pressed into the pipe end, the pipe is axially displaced at least until the wedges of the holder engage. If the friction between the outer tube wall and the wedge pieces is relatively low, for example if the outer tube wall has a layer of grease, then the tube is displaced over the entire stroke of the piston, so that the plunger is not pressed into the end of the tube.
  • the device according to US-A 23 94 841 has a first air cylinder which drives a first rack which is in engagement with a first gear which in turn drives a first eccentric drive which is connected to first connecting rods.
  • These first connecting rods hold a clamping block surrounding a die, which, when the first cylinder is actuated, clamps the die, which consists of segments, against the pipe to be expanded.
  • a spring is released, which expands an expansion sleeve inside the tube.
  • a second air cylinder is actuated, a punch is moved into the interior of the tube via a second toothed rack, a second toothed wheel, another eccentric drive and a further connecting rod.
  • the object is to improve the device in such a way that the tube has a secure hold during expansion and the expansion is carried out in a controlled manner.
  • the pipe end 8 to be expanded is surrounded by a die 1, which is divided into two in the longitudinal direction and has a recess 10 in the region of the end 9 of the pipe.
  • the two-part die 1 is arranged in a die holder 11 which is connected to a frame 12.
  • the recess 10 determines the outer shape of the widening to be provided at the end 9.
  • the frame carries a cylinder 13, which in turn is connected to an expansion sleeve 4.
  • This expansion sleeve 4 is inserted with its head 14 into the tube 8 such that its expansion head 14 comes to rest against the inner wall of the tube 8.
  • the expansion head 14 is located in the area of the die 1 at the level of the area of the die 1, which adjoins the recess 10.
  • expansion mandrel 3 which is conical in the area of the expansion head 14.
  • This expanding mandrel 3 is connected to the piston 15 inside the cylinder 13. If a pressure medium is applied to the left cylinder chamber of the cylinder 13, the expanding mandrel 3 executes a movement to the right, in which the conical wedge of the expanding mandrel 3 spreads the expanding head 14 , which is provided with axially extending slots 16 for this purpose.
  • This expansion head 14 thus comes to rest against the inner wall of the tube 8, which is held in this way between the die 1 and the expansion head 14.
  • the plunger 5 which has an axial bore for this purpose, is slidably arranged on the area of reduced diameter of the expanding sleeve 4 adjoining the expanding head 14.
  • This stamp 5 is fastened to a guide housing 17, in which the cylinder 13 is slidably arranged.
  • the guide housing 17 has a slot 18 through which the arm 19 of the frame 12 is guided, to which the cylinder 13 is attached.
  • the right cylinder chamber of the cylinder 22 is pressurized with a pressure medium, whereby the piston rod 20 moves the plunger 5 in the direction of the tube end 9 via the guide housing 17.
  • the punch 5 is pressed into the pipe end 9 in this way, this being deformed against the surface of the recess 10.
  • the punch 5 has a cylindrical extension 7, the diameter of which is smaller than the inside diameter of the pipe.
  • the die 1, the expansion sleeve 4 and the punch 5 are interchangeable, so that the device can be adapted to different pipe diameters and pipe wall thicknesses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (5)

  1. Appareil pour élargir des extrémités de tubes (9) au moyen d'un poinçon (5) pouvant être pressé dans le tube (8) et possédant à peu près une forme en coin, l'appareil comprenant une matrice (1) qui entoure l'extrémité (9) du tube et possède un évidement (10) dans la région de l'élargissement à former, évidement dans lequel peut être engagé le poinçon (5), de même qu'une douille expansible (4, 14), le tube (8) étant maintenu par la douille expansible (4, 14) pendant l'opération d'élargissement, la douille, par son expansion, pouvant être appliquée contre la paroi interne du tube, dans la partie du tube faisant suite à la portion de tube située dans la région de l'évidement (10) de la matrice, de sorte que le tube (8) peut être serré entre la douille expansible (4, 14) et la matrice (1), le poinçon (5), présentant un alésage de guidage, étant disposé coulissant et guidé sur la tige de la douille expansible (4, 14), et un mandrin d'expansion (3) étant disposé coulissant à l'intérieur de la douille expansible, caractérisé en ce que le mandrin d'expansion (3) est relié, par son extrémité éloignée de la tête expansible (14), à un piston (15) d'un vérin (13) dont le cylindre stationnaire est relié à la douille expansible (4, 14), le cylindre de ce vérin (13) est entouré par un carter de guidage (17) portant à une extrémité le poinçon (5), et un vérin stationnaire supplémentaire (22) est prévu pour agir par son piston (21) sur l'autre extrémité du carter de guidage (17).
  2. Appareil selon la revendication 1, caractérisé en ce que la matrice (1) et le vérin (13) relié à la douille expasible (4, 14), sont portés par un bâti (12) commun.
  3. Appareil selon la revendication 2, caractérisé en ce que la partie (19) du bâti (12) portant le vérin (13), traverse une lumière (18) ménagée dans le carter de guidage (17).
  4. Appareil selon la revendication 2 ou 3, caractérisé en ce que le bâti (12) porte le vérin supplémentaire (22).
  5. Appareil selon une des revendications 1 à 4, caractérisé en ce que la matrice (1) est divisée en deux parties et est maintenue par un porte-matrice (11) qui est lui-même relié au bâti (12).
EP88102680A 1987-02-26 1988-02-24 Dispositif d'élargissement de fins de tubes Expired - Lifetime EP0284773B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8702934U DE8702934U1 (de) 1987-02-26 1987-02-26 Vorrichtung zum Aufweiten von Rohrenden
DE8702934U 1987-02-26

Publications (3)

Publication Number Publication Date
EP0284773A2 EP0284773A2 (fr) 1988-10-05
EP0284773A3 EP0284773A3 (en) 1990-02-28
EP0284773B1 true EP0284773B1 (fr) 1991-10-02

Family

ID=6805210

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102680A Expired - Lifetime EP0284773B1 (fr) 1987-02-26 1988-02-24 Dispositif d'élargissement de fins de tubes

Country Status (3)

Country Link
EP (1) EP0284773B1 (fr)
DE (2) DE8702934U1 (fr)
ES (1) ES2025714T3 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4934038A (en) * 1989-09-15 1990-06-19 Caterpillar Inc. Method and apparatus for tube expansion
DE19704131C2 (de) * 1997-02-04 2003-01-02 Ex Cell O Gmbh Verfahren und Vorrichtung zum Bruchtrennen
HUP9800170A1 (hu) * 1998-01-30 2000-09-28 Zoltán Farkas Eljárás kétkerekű járművek, különösen kerékpárok kerékagy hüvelyének előállítására
DE10135515B4 (de) 2001-07-20 2006-06-01 ITT Manufacturing Enterprises, Inc., Wilmington Umformwerkzeug
DE102005059388A1 (de) * 2005-12-09 2007-06-14 Rennsteig Werkzeuge Gmbh Vorrichtung zum Aufweiten von Rohrenden
GB0608775D0 (en) * 2006-05-04 2006-06-14 Caldervale Technology Ltd Device for preparing pipe ends for jointing
DE102014008550A1 (de) * 2014-06-16 2015-12-17 Sms Meer Gmbh Mechanischer Rohrexpander
RU2633676C1 (ru) * 2016-09-26 2017-10-16 Публичное акционерное общество "Уфимское моторостроительное производственное объединение" Устройство для вальцевания полых деталей
GB2561832A (en) 2017-04-21 2018-10-31 Eaton Intelligent Power Ltd Arrangement for working a tube end
US10940521B2 (en) 2017-06-29 2021-03-09 Milwaukee Electric Tool Corporation Swage tool
CN110479826A (zh) * 2019-07-26 2019-11-22 中国航发贵州黎阳航空动力有限公司 一种用于航空发动机薄壁机匣密封装置扩口的工装
CN110605338B (zh) * 2019-10-09 2024-05-31 格力电器（重庆）有限公司 一种铜管自动扩缩口装置
CN113369394A (zh) * 2021-05-21 2021-09-10 新乡市博威机械有限公司 一种具有高效冷却机构的卧型卧式胀管机

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2266795A (en) * 1938-04-29 1941-12-23 Arthur L Parker Apparatus for preparing flared end tubes
US2352912A (en) * 1941-03-31 1944-07-04 Parker Appliance Co Tube expanding and flaring machine
US2394841A (en) * 1943-06-16 1946-02-12 Kenly C Bugg Flanging device
US2464510A (en) * 1945-01-10 1949-03-15 Parker Appliance Co Tube flaring machine
US2941568A (en) * 1958-04-21 1960-06-21 Gen Dynamics Corp Tube flaring machine
US3200627A (en) * 1961-12-12 1965-08-17 Baldwin Lima Hamilton Corp Pipe flaring or belling
US3412592A (en) * 1965-10-22 1968-11-26 Olin Mathieson Pipe gripping and flaring apparatus
DE1918815A1 (de) * 1969-04-14 1970-10-15 Guenter Zimmer Vorrichtung zum Kaltverformen von Rohrenden

Also Published As

Publication number Publication date
DE8702934U1 (de) 1987-04-09
DE3865223D1 (de) 1991-11-07
ES2025714T3 (es) 1992-04-01
EP0284773A2 (fr) 1988-10-05
EP0284773A3 (en) 1990-02-28

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