EP0322722A2 - Procédé et appareil pour le formage de collerettes latérales sur des tubes en tôle - Google Patents

Procédé et appareil pour le formage de collerettes latérales sur des tubes en tôle Download PDF

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Publication number
EP0322722A2
EP0322722A2 EP88121335A EP88121335A EP0322722A2 EP 0322722 A2 EP0322722 A2 EP 0322722A2 EP 88121335 A EP88121335 A EP 88121335A EP 88121335 A EP88121335 A EP 88121335A EP 0322722 A2 EP0322722 A2 EP 0322722A2
Authority
EP
European Patent Office
Prior art keywords
necking
mandrel
cone
tube
collar
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.)
Granted
Application number
EP88121335A
Other languages
German (de)
English (en)
Other versions
EP0322722B1 (fr
EP0322722A3 (en
Inventor
Waldemar Bauer
Bernd Ing.(Grad.) Schappler
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.)
Weba Westerbarkey & Co Kg GmbH
Original Assignee
Westaflexwerk & Co KG GmbH
Weba Westerbarkey & Co Kg GmbH
Westaflexwerk & Co KG GmbH
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 Westaflexwerk & Co KG GmbH, Weba Westerbarkey & Co Kg GmbH, Westaflexwerk & Co KG GmbH filed Critical Westaflexwerk & Co KG GmbH
Publication of EP0322722A2 publication Critical patent/EP0322722A2/fr
Publication of EP0322722A3 publication Critical patent/EP0322722A3/de
Application granted granted Critical
Publication of EP0322722B1 publication Critical patent/EP0322722B1/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
    • 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 invention relates to a method and a device for necking sheet metal tubes on a preferably oval side cutout by means of a mandrel for the tube and a necking die placed on the cutout, through which a necking cone is drawn.
  • the difficulty is to cut an opening in the one pipe to which the other pipe is to be connected, which allows the penetration of the two corresponds to cylindrical body and cut the other tube at its end so that the penetration curve is formed.
  • the butt welding or soldering of the pipes prepared in this way is associated with considerable difficulties, requires extraordinary manual dexterity and is also very time-consuming. It has therefore become the practice to provide the sheet metal pipes to which a further pipe is to be connected with a neck.
  • the first tube is provided with a preferably oval lateral cutout and the tube is pushed onto a mandrel in which a necking cone is loosely arranged in a corresponding cavity.
  • the cutout of the tube is centered with the cone and then a necking die is placed on the tube, also centered, and a threaded rod is screwed into a central threaded hole of the necking cone.
  • This is connected to the piston rod of a hydraulic cylinder, which is mounted on the necking die.
  • the necking cone is then pulled out of the tube by means of the hydraulic cylinder and thereby deforms the area around the oval cutout, bearing against the necking die, so that the sheet metal tube is necked out.
  • the necking device After dismantling the necking device, unscrewing the necking cone and pulling off the tube from the holding mandrel, the second tube, the connecting tube, can then be welded or soldered to the necking of the tube thus produced, optionally while straightening the edge of the necking, as on a tubular flange or a pipe joint.
  • the invention has set itself the task of avoiding these disadvantages in the previously known necking of pipes and to provide a device with which the necking of pipes can be carried out largely automatically with very little expenditure of time, ensuring that an undesired deformation and bulging of the Pipes during necking is avoided.
  • a generic method is characterized in that the pipe rests over a large area around the cutout on the mandrel, which in turn is overlapped on one half to the largest diameter lying transversely to the neck over approximately its entire length by a half-shell in which the necking die is formed.
  • a device is characterized in that the length of the holding mandrel corresponds approximately to 3 times the diameter of the neck and is designed such that the tube lies outside the neck opening with its entire inner surface on the holding mandrel and the necking die of approximately the same length of the
  • the mandrel as a support shell surrounds this and the attached tube up to the mandrel diameter lying transversely to the necking and the necking cone is provided with a central through hole for receiving the free end of the piston rod of the hydraulic cylinder, which is to be coupled to the necking cone by means of spring-loaded radial pawls.
  • the mandrel has opposite supports for this cone at the largest transverse diameter of the recess for the necking cone.
  • the mandrel is advantageously tubular and has a recess in the shape of the through Penetration of the neck with the tube, which is provided at the opposite deepest points with flat contact surfaces for the neck cone.
  • spring-loaded pawls can be arranged at at least two radially opposite points, the pivot bearings of which are adjacent to the end of the piston rod. At least two radially opposite spring-loaded pawls can also be arranged in the through hole of the necking cone at its wide end, the pivot bearings of which lie opposite the wide end of the cone.
  • the holding mandrel is provided with a through-opening which is located coaxially opposite the recess for the necking cone and, likewise coaxially, opposite the piston rod, a trigger pot which can be pushed forward on a rod and which has the outer edge of the spring-loaded pawls pushes back on the piston rod or neck cone, picks up the latter and returns it to its starting position in the recess.
  • the method and with the device according to the invention it is possible to slide a tube consisting of relatively very thin sheet metal, which is already provided with a lateral oval cutout elsewhere, on the tubular mandrel and after alignment of the cutout in the tube Aushalskegel put the device into action, which then lowers the necking die with the surrounding half-shell and presses the pipe against the mandrel over a large area. Then the piston rod already aligned in the machine on the necking cone and the necking die lowers and couples attaches itself automatically to the neck cone, which is then immediately pulled out through the necking die to form the neck on the tube.
  • the necked-out pipe is released and can be pulled off the mandrel, whereupon the release cup is pushed up through the pin to release the pawls that connect the necking cone to the piston rod, pick up the necking cone and back again to drive on its support in the arbor. Then a new work cycle can begin immediately.
  • an elongated hole 2 with an oval or flat-oval outline is laterally cut or punched into a tube 1.
  • a neck 3 is formed on the tube 1 at the location of this hole 2, which is used in the form of a collar or flange for attaching and welding or soldering another tube.
  • This neck 3 can run at right angles to the axis of the tube 1, but it can also be designed to be inclined at an angle if the tube to be connected is to derive at such an angle.
  • the device according to Fig. 3 essentially consists of a frame-fixed mandrel 4, which is advantageously designed in the form of a tube made of strong material.
  • the mandrel 4 has about 3 times the length of the diameter of the neck 3 in the tube, which is indicated here by the thin line 1.
  • a wide opening 5 is provided, the boundary 6 of which corresponds to the penetration of the neckline to be produced with the tube 1.
  • a small, likewise round opening 7 is arranged in the holding mandrel centrally on this opening 5 on the opposite side of the holding mandrel 4.
  • a half-shell 8 is placed on the mandrel 4, of approximately the same length of the mandrel.
  • This half-shell 8 surrounds the mandrel 4, taking into account the sheet thickness of the tube 1 over its entire upper half up to the largest diameter of the mandrel, which is transverse to the neck.
  • the necking die 9 is fixedly arranged, the inner opening 10 of which corresponds to the cutout 5 in the holding mandrel and adjoins the boundary 6 of this holding opening 5 with a rounded edge.
  • the attachment on the half-shell 8, referred to as the necking die 9, is reproduced here for clarification only to a considerable extent; it may also be missing if the material thickness of the half-shell 8 is sufficient to ensure adequate guidance of the sheet when pulling the neck.
  • Fig. 4 Such an embodiment is shown in Fig. 4 and the following. In these figures, the device is further described and its function is immediately explained. 4 and 5, the tube 1 provided with the lateral cutout 2 is pushed onto the mandrel 4. In the upper opening 5 of the tube, the neck cone 11 is inserted in such a way that it rests securely on opposite sides on flat surfaces 9 formed there on the boundary 6 of the opening 5. The necking cone 11 is provided with a central through hole 13. The tube 1 pushed onto the mandrel 4 is aligned with its cutout 2 centrally with respect to the necking cone 11.
  • a stop can be arranged on the holding mandrel, which limits the length of the pipe 1 being pushed on, and furthermore a marking can be attached to the pipe, which is to be aligned with a corresponding marking on the holding mandrel or the stop when pushed on.
  • the half-shell 8 is held above the mandrel 4 on a vertically displaceable slide 14, above which the hydraulic cylinder 15 is also arranged, the piston rod 16 of which projects downward and is centered with respect to the through hole 13 of the necking cone 11.
  • the piston rod 16 of which projects downward and is centered with respect to the through hole 13 of the necking cone 11.
  • two spring-loaded pawls 17 are arranged radially opposite one another, the pivot point of which lies directly adjacent to the end face of the piston rods. It can be seen that these pawls 17 begin due to their spring loading similar to barbs at the end of the piston rod, protrude obliquely from this.
  • the diameter of the piston rod 16 corresponds to the diameter of the through hole 13 in the end cone.
  • the carriage 14 is lowered and thus the half-shell 8 is pressed onto the mandrel 4 with the interposition of the tube 1 pushed onto the mandrel.
  • the piston rod 16 has already been lowered and, as will be explained in more detail later , after immersion in the through hole of the neck cone 11 couples to it.
  • the piston rod is then pulled upward again from its cylinder and has pulled the neck cone 11 upward while necking out the tube 1.
  • the neck 3 can be seen particularly well in FIG. 6. It can also be seen that during the entire necking process, the sheet metal of the tube rests against the mandrel 4 on its entire inner surface and is held in its upper half by the half-shell 8 against the mandrel 4, so that an undesired deformation or bulge cannot occur. Only the areas of the tube 1 to be deformed are exposed and can be pressed against the limiting cutout 18 or 10 according to FIG. 3 by the necking cone, so that here too there is a clear deformation and guidance.
  • a release pot 19 arranged coaxially below the holding mandrel 4 is raised on a rod 20, through the opening 7 which has now been opened in the holding mandrel, until it rests against the lower end of the piston rod 16.
  • the arrangement is such that the end of the piston rod 16 is suitably inserted into a cavity 21 of the trigger pot 19, the pawls 17 in the piston rod being pressed back against their spring load. As a result, the neck cone 11 is released so that it can slide off the piston rod 16 and rests on the upper edge of the trigger pot 19.
  • a circular groove is expediently inserted in the neck cone 11 surrounding the end of the piston rod take into which the upper edge of the trigger pot 19 can be positively inserted.
  • the neck cone thus loosened from the piston rod 16 is then guided downwards by the trigger pot 19 until it rests on the flat surfaces 9 which delimit the opening 5 of the holding mandrel 4 and remains there, while the trigger pot returns to its initial position accordingly Fig. 5 and previous is withdrawn. This completes the largely automatic work cycle and a next one can begin.
  • FIGS. 9 to 13 A working cycle of the necking cone is explained with reference to FIGS. 9 to 13.
  • Fig. 9 it is shown that the piston rod 16 has penetrated the central through hole 13 of the neck cone 11.
  • the piston rod 16 was thus firmly connected or coupled to the neck cone 11.
  • the trigger pot 19 is pushed upwards from below in the direction of arrow A by means of the rod 20.
  • the trigger pot 19 slides over the piston rod 16, receiving the end protruding from the neck cone 11, and presses the pawls 17 back against the action of their springs into the piston rod 16. This state is reached in FIG. 10. The coupling between the piston rod 16 and the neck cone 11 is thus released and the neck cone 11 can sit on the upper edge of the trigger pot 19 and slide off the piston rod 16.
  • the trigger pot is pulled down in the direction of arrow B, the necking cone lies on its upper edge, expediently positively connected with an annular groove which surrounds the through hole 13 on the underside of the cone and has the same outer diameter as the trigger pot .
  • the necking cone 11 lies on the two opposing support levels 9 and is thus returned to its starting position, corresponding to FIG. 12.
  • the trigger pot 19 is pulled further down in the direction of the arrow, out of the mandrel 4, corresponding to FIG. 13, until it has reached its starting position again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP88121335A 1987-12-24 1988-12-21 Procédé et appareil pour le formage de collerettes latérales sur des tubes en tôle Expired - Lifetime EP0322722B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3744046A DE3744046C2 (de) 1987-12-24 1987-12-24 Verfahren und Vorrichtung zum Aushalsen von dünnwandigen Blechrohren
DE3744046 1987-12-24

Publications (3)

Publication Number Publication Date
EP0322722A2 true EP0322722A2 (fr) 1989-07-05
EP0322722A3 EP0322722A3 (en) 1990-09-19
EP0322722B1 EP0322722B1 (fr) 1995-01-25

Family

ID=6343566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121335A Expired - Lifetime EP0322722B1 (fr) 1987-12-24 1988-12-21 Procédé et appareil pour le formage de collerettes latérales sur des tubes en tôle

Country Status (4)

Country Link
EP (1) EP0322722B1 (fr)
AT (1) ATE117600T1 (fr)
DE (1) DE3744046C2 (fr)
ES (1) ES2068195T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0752289A2 (fr) * 1995-06-05 1997-01-08 Enami Seiki Mfg. Co., Ltd. Outil de formation d'un raccordement et procédé de formation d'un raccordement sur un tube métallique
EP0792702A2 (fr) * 1996-02-27 1997-09-03 KWG Maschinenbau GmbH Appareil pour la formation de collerette dans des pièces
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
US6612020B2 (en) * 1997-08-28 2003-09-02 The Boeing Company Apparatus for superplastic forming of tubing
RU2448052C1 (ru) * 2010-11-08 2012-04-20 Александр Вадимович Утин Способ сгущения сапонитовой суспензии
EP4342597A4 (fr) * 2022-07-04 2024-07-17 Sung Keun Noh Procédé de fabrication de tuyau de raccordement en forme de t

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29616668U1 (de) * 1996-09-27 1997-04-24 Ade, Rainer, 71711 Steinheim Rohrumformer
DE102005026761A1 (de) † 2005-06-09 2006-12-21 Martin Brielmaier Fahrzeug

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2240319A (en) * 1939-07-24 1941-04-29 Taylor James Hall Method of producing pipe fittings
US2368394A (en) * 1943-05-03 1945-01-30 Young Radiator Co Apparatus for flanging openings in tube type headers
GB749794A (en) * 1953-11-19 1956-05-30 Arthur Collier Junior Improved tool for making tee or branch joints in tubing
GB807608A (en) * 1956-10-18 1959-01-21 Andre Huet Methods of and apparatus for producing tubulures along a generatrix of a header
US3064707A (en) * 1959-09-30 1962-11-20 Carrier Corp Joining of tubular members
US3680349A (en) * 1970-06-18 1972-08-01 United Mcgill Corp Apparatus for making a conduit fitting
WO1983004379A1 (fr) * 1982-06-09 1983-12-22 Beckman Instruments, Inc. Assemblage d'attache d'un rotor de centrifugeuse

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2240319A (en) * 1939-07-24 1941-04-29 Taylor James Hall Method of producing pipe fittings
US2368394A (en) * 1943-05-03 1945-01-30 Young Radiator Co Apparatus for flanging openings in tube type headers
GB749794A (en) * 1953-11-19 1956-05-30 Arthur Collier Junior Improved tool for making tee or branch joints in tubing
GB807608A (en) * 1956-10-18 1959-01-21 Andre Huet Methods of and apparatus for producing tubulures along a generatrix of a header
US3064707A (en) * 1959-09-30 1962-11-20 Carrier Corp Joining of tubular members
US3680349A (en) * 1970-06-18 1972-08-01 United Mcgill Corp Apparatus for making a conduit fitting
WO1983004379A1 (fr) * 1982-06-09 1983-12-22 Beckman Instruments, Inc. Assemblage d'attache d'un rotor de centrifugeuse

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0752289A2 (fr) * 1995-06-05 1997-01-08 Enami Seiki Mfg. Co., Ltd. Outil de formation d'un raccordement et procédé de formation d'un raccordement sur un tube métallique
EP0752289A3 (fr) * 1995-06-05 1997-11-26 Enami Seiki Mfg. Co., Ltd. Outil de formation d'un raccordement et procédé de formation d'un raccordement sur un tube métallique
US5943773A (en) * 1995-06-05 1999-08-31 Enami Seiki Mfg. Co., Ltd. Branch pipe forming tool and method of forming branch pipe on metal tube with the tool
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
EP0792702A2 (fr) * 1996-02-27 1997-09-03 KWG Maschinenbau GmbH Appareil pour la formation de collerette dans des pièces
EP0792702A3 (fr) * 1996-02-27 1997-11-05 KWG Maschinenbau GmbH Appareil pour la formation de collerette dans des pièces
US6021571A (en) * 1996-02-27 2000-02-08 Kathrin Witulski Apparatus for forming collars in workpieces
US6612020B2 (en) * 1997-08-28 2003-09-02 The Boeing Company Apparatus for superplastic forming of tubing
RU2448052C1 (ru) * 2010-11-08 2012-04-20 Александр Вадимович Утин Способ сгущения сапонитовой суспензии
EP4342597A4 (fr) * 2022-07-04 2024-07-17 Sung Keun Noh Procédé de fabrication de tuyau de raccordement en forme de t

Also Published As

Publication number Publication date
DE3744046C2 (de) 1994-11-24
EP0322722B1 (fr) 1995-01-25
ATE117600T1 (de) 1995-02-15
EP0322722A3 (en) 1990-09-19
ES2068195T3 (es) 1995-04-16
DE3744046A1 (de) 1989-07-06

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