EP0941780B1 - Méthode et dispositif pour former les corps creux avec des renflements de distance en distance - Google Patents

Méthode et dispositif pour former les corps creux avec des renflements de distance en distance Download PDF

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Publication number
EP0941780B1
EP0941780B1 EP99104527A EP99104527A EP0941780B1 EP 0941780 B1 EP0941780 B1 EP 0941780B1 EP 99104527 A EP99104527 A EP 99104527A EP 99104527 A EP99104527 A EP 99104527A EP 0941780 B1 EP0941780 B1 EP 0941780B1
Authority
EP
European Patent Office
Prior art keywords
hollow body
hollow member
bulges
sealing
bulge
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
EP99104527A
Other languages
German (de)
English (en)
Other versions
EP0941780A1 (fr
Inventor
Egon Olszewski
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.)
Benteler Deustchland GmbH
Original Assignee
Benteler Deustchland 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 Benteler Deustchland GmbH filed Critical Benteler Deustchland GmbH
Publication of EP0941780A1 publication Critical patent/EP0941780A1/fr
Application granted granted Critical
Publication of EP0941780B1 publication Critical patent/EP0941780B1/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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/045—Closing or sealing means
    • 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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/043—Means for controlling the axial pusher
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure

Definitions

  • the invention relates to a method for manufacturing of a tubular hollow body with spaced apart Bulges using internal high pressure deformation.
  • tubular hollow bodies by means of internal high pressure deformation to reshape.
  • EP 0 439 764 B1 describes a process for the production of hollow one-piece metallic workpieces. With this A tubular hollow body is used as the starting form under the pressure of a liquid while at the same time axial feed movement expanded and to the shape of a split mold.
  • the length of the hollow body to be formed is limited because the free buckling length with the length of the Hollow body increases and the axial feeding without additional Increasing the internal pressure to form wrinkles on would lead hollow body. It also increases with the increase of the internal pressure the locking force required for longer lengths very strong. This in turn leads to an increase the manufacturing cost.
  • the known method comes across to its limits, especially if more than two Bulges can be manufactured in one step should.
  • DE 196 22 371 A1 discloses one method and one Device for the production of camshafts, in which through the cams from a hollow semi-finished product High pressure can be formed. In doing so, a Sealed inner portion of the hollow body at one end and supported at the other end. Under axial Pushing on this inner section Bulge manufactured under high hydraulic pressure. The number of bulges is due to the contour of the Mold given.
  • US-A-4,788,843 also discloses a method and an Device for the hydraulic forming of a tubular Hollow body emerges, with more than two bulges be generated on a hollow body in one operation can.
  • the hollow body is placed in a mold inserted, fixed at the ends by mandrels and sealed.
  • the hollow body is over the end mandrels then filled with a fluid. After that Press plunger pushed through the mandrels into the hollow body, which builds up the necessary hydraulic internal pressure and the bulges are created. In this way U-shaped hollow bodies can also be machined.
  • the invention is therefore based on the prior art according to DE-A-19622372 based on the task of producing tubular Hollow bodies with several bulges arranged at a distance using the internal high pressure deformation at Procedural avoidance of inadmissible wall thinning to improve.
  • the main idea is the measure, the bulges on To produce hollow parts in sections. To do this first an inner portion of the hollow body at one end sealed and internally supported at the other end. Then a bulge is created on this inner section by means of hydraulic internal high pressure under axial Pushing the hollow body generated. The production further bulges on the hollow body take place in the same Way after each axial implementation of the hollow body in Molding tool.
  • the shape and geometry of the bulges can be tailored to the requirements by selecting appropriate matrices in the Forming tool can be determined.
  • Bulges can both radial on one side on the hollow body or circumferentially annular be generated.
  • the bulges can also be with each other be circumferentially offset.
  • the invention The method is therefore particularly suitable for Manufacture of e.g. hollow camshafts on this Can be manufactured rationally and economically.
  • the process comes with a two-part mold, a sealing mandrel that can be attached to a hollow body at the end as well as a sealing and insertable into the hollow body Support tool for use.
  • the sealing and Support tool has a sealing head and a support body on, each in their axial position in the hollow body are positionable.
  • the sealing head is movable and media-tight on the inner surface of the hollow body Plant can be brought. He is guided by a guide rod that penetrates the support body with radial play in the intended position brought.
  • the correct positioning of the support body and the Sealing heads allow flexible adjustment in terms of the length of the tubular hollow body and in terms of the length of the inner section because of its length varies with the axial extension of the bulges.
  • the hollow body is advantageous between production bent two bulges. This enables repeated Hydroforming and bending the manufacture of multiple curved and bulged hollow bodies almost any Length.
  • the hydraulic internal pressure is supported Applied end of the hollow body forth.
  • one or more Bulges can be opened at the front. This can in various ways, preferably shear cutting technology, for example, by punching. By the Openings of the bulges become necklines on the hollow body educated.
  • the Sealing head made of two plates that can be moved against each other with an intermediate sealing insert. By the Pressing the two plates together forms the sealing insert a circumferential sealing bead that acts as a sealing ring and seals the hollow body in a media-tight manner.
  • Figures 1 to 8 is a tubular Hollow bodies in various stages of manufacture. Figures 1 to 8 are technically simplified and not to understand to scale.
  • Figure 1 shows the tubular hollow body 1 in its Starting position.
  • a length section 2 of the tubular Hollow body 1 is received by a mold 3, which consists of an upper die 4 and a lower die 5.
  • the dies 4, 5 is a contour 6, 7 for hydraulic forming of the tubular hollow body 1 incorporated.
  • the molding tool 3 is in the length range 8 provided with a radial expansion 9.
  • the on this widening 9 adjoining contour sections 10, 11 support the length section enclosed by the molding tool 3 2 of the tubular hollow body 1 on the outside.
  • the molding tool 3 is at the end of the length section 2 open and has a radial widening 12 on the mouth side with a conical transition 13.
  • sealing and support tool 14 In the length section 2 of the hollow body 1 is a sealing and support tool 14 introduced.
  • the sealing and support tool 14 comprises a sealing head 15, a support body 16 and a guide rod 17.
  • sealing head 15 and support body 16 are each in their axial position in the hollow body 1 positionable. For positioning is the Sealing head 15 with the support body 16 with a radial Game enforcing guide rod 17 connected.
  • An inner section 18 located in the length region 8 is with the help of the sealing and support tool 14 on one End 19 sealed by the sealing head 15 and the other End 20 supported by the support body 16.
  • the sealing head 15 comprises two displaceable against each other Plates 21, 21 'with an interposed sealing insert 22 (see also Figure 9).
  • the sealing insert 22 forms one on the radial Outside 23 of the sealing head 15 circumferential sealing bead 24, which is on the inner surface 25 of the hollow body 1 creates and the sealing head 15 jammed.
  • the axial length L of the sealing head 15 is not larger than two thirds the length L1 of the contour section 11 of the molding tool 3rd
  • a piston-like sealing mandrel 26 the length section 2 of the tubular hollow body 1 from the end media-tight. Via an axial channel guided through the sealing mandrel 26 27 becomes a hydraulic high internal pressure in the sealing head 15 and sealing mandrel 26 sealed length section 28, which also includes the inner portion 18.
  • Figure 2 shows the representation in vertical longitudinal section of Figure 1 during the forming process of the tubular Hollow body 1.
  • the sealing mandrel 26 pushes the tubular hollow body 1 axially in the direction of the inner portion 18, the simultaneously applied hydraulic Internal high pressure to form a bulge 29 am Hollow body 1a leads.
  • the support body 16 prevents Buckling of the hollow body 1a during the pushing. By pushing in, impermissible material thinning becomes avoided in the region of the bulge 29.
  • the next manufacturing step according to Figure 3 shows how the reshaped hollow body 1a axially in the image plane to the right is implemented and the sealing mandrel 26 with the sealing head 15 a new length section 28a and the sealing head 15 with the support body 17 delimits an inner portion 18a.
  • Figure 4 shows how in the further production sequence second bulge 30 on the tubular hollow body 1b is attached.
  • the forming process is identical to that to figure 2.
  • FIG. 5 shows the hollow body 1c, which follows a bending deformation from the hollow body 1b from FIG. 4 emerged.
  • the still undeformed end section 31 of the hollow body 1c is, as shown in Figure 6, introduced into the mold.
  • Figure 7 shows the forming according to Figure 2, one further bulge 32 is generated.
  • the hollow body 1d is in accordance with the manufacturing steps in Figure 3 and Figure 4 axially implemented and it will be a last A bulge 33 is produced.
  • Figure 8 shows the tubular longitudinal section Hollow body 1e, as shown in the figures 1 to 7 Manufacturing steps has emerged in Final state after the internal high pressure deformation.
  • the curved one and provided with bulges 29, 30, 32, 33 Hollow body 1e can then undergo further treatment that may be required be fed.

Claims (4)

  1. Procédé pour fabriquer un corps creux de forme tubulaire (1, 1a-1e) possédant des renflements (29, 30, 32, 33) situés à distance les uns des autres dans la direction longitudinale du corps creux (1, 1a-1e), moyennant l'application de la déformation sous haute pression intérieure, dans le cas d'un soutien extérieur au moins par endroits, dans un outil de formage (3) formé de deux parties, qui possède un contour qui comporte un élargissement (9) servant à former un renflement (29, 30, 32, 33) dans le corps creux, selon lequel au moins une partie intérieure (18) du corps creux (1, 1a-1e) est fermée de façon étanche à une extrémité (19) et prend appui intérieurement au niveau de son autre extrémité (20) et un renflement (29) est produit, au niveau de cette partie intérieure (18), à l'aide d'une haute pression hydraulique intérieure moyennant une poussée axiale du corps creux (1, 1a-1e), caractérisé en ce que pour fabriquer un premier renflement (29) dans le corps creux (1, 1a-1e), on introduit un outil d'étanchéité et d'appui (14) équipé d'une tête d'étanchéité (15) et d'un corps d'appui (16) dans le corps creux (1, 1a-1e), la tête d'étanchéité (15) et le corps d'appui étant positionnés respectivement dans leur position axiale dans le corps creux (1, 1a-1e), et la tête d'étanchéité (15) est montée de manière à être déplaçable au moyen d'une tige de guidage (17) traversant le corps d'appui (16) avec un jeu radial, et en étant appliquée d'une manière étanche aux fluides contre la surface intérieure (25) du corps creux (1, 1a-1e), à la suite de quoi, après un changement axial de position du corps creux (1, 1a-1e) dans l'outil de formage (3), on fabrique de la même manière un autre renflement (30, 32, 33) et on coude le corps creux (1, 1a-1e) entre les fabrications de deux renflements (30, 32).
  2. Procédé selon la revendication 1, caractérisé en ce que la haute pression hydraulique intérieure est appliquée à partir de l'extrémité supportée (20) du corps creux (1, 1a-1e)
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que les renflements (29, 30, 32, 33) sont ouverts frontalement.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que dans la tête d'étanchéité (15), deux plaques (21, 21') sont décalées l'une par rapport à l'autre avec un insert d'étanchéité (22) intercalé.
EP99104527A 1998-03-11 1999-03-06 Méthode et dispositif pour former les corps creux avec des renflements de distance en distance Expired - Lifetime EP0941780B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19810422A DE19810422C1 (de) 1998-03-11 1998-03-11 Verfahren und Vorrichtung zur Herstellung eines rohrförmigen Hohlkörpers mit im Abstand angeordneten Ausbauchungen
DE19810422 1998-03-11

Publications (2)

Publication Number Publication Date
EP0941780A1 EP0941780A1 (fr) 1999-09-15
EP0941780B1 true EP0941780B1 (fr) 2001-11-14

Family

ID=7860445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99104527A Expired - Lifetime EP0941780B1 (fr) 1998-03-11 1999-03-06 Méthode et dispositif pour former les corps creux avec des renflements de distance en distance

Country Status (5)

Country Link
US (1) US6044678A (fr)
EP (1) EP0941780B1 (fr)
DE (1) DE19810422C1 (fr)
ES (1) ES2163312T3 (fr)
PT (1) PT941780E (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19802484C2 (de) * 1998-01-23 2000-06-08 Daimler Chrysler Ag Verfahren und Vorrichtung zur Herstellung von gebauten Nockenwellen
DE10004159C2 (de) * 2000-02-01 2001-12-06 Bosch Gmbh Robert Düsenstock für Gasbrenner
US6176114B1 (en) * 2000-05-23 2001-01-23 General Motors Corporation Method and apparatus for sequential axial feed hydroforming
FR2828120B1 (fr) * 2001-08-06 2003-10-10 Brigitte Dossmann Procede et dispositif pour courber un tube cylindrique ou analogue
US6695711B2 (en) 2002-01-28 2004-02-24 Royal Precision, Inc. Hydroformed metallic golf club shafts and method therefore
DE10212400C5 (de) * 2002-03-13 2010-05-20 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Formbauteils
US6984179B2 (en) 2002-10-28 2006-01-10 Royal Precision, Inc. Golf club shafts having variable taper lengths
US20040138000A1 (en) * 2003-01-15 2004-07-15 Braly W. Kim Lightweight, durable golf club shafts
CN100489165C (zh) * 2004-06-15 2009-05-20 沈传良 不锈钢巢丝筒管的加工模具和方法
US20060260374A1 (en) * 2005-05-23 2006-11-23 Flex-Weld, Inc. Hydroforming machine
DE102016112157B4 (de) * 2016-07-04 2019-05-23 Linamar Gmbh Verfahren und Vorrichtung zur Herstellung einer Nockenwelle sowie Nockenwelle

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
FR1136143A (fr) * 1954-11-22 1957-05-09 Procédé de fabrication de tuyaux métalliques flexibles
US3130771A (en) * 1957-09-20 1964-04-28 Federal Mogul Bower Bearings Metal bellows forming apparatus
DE3004838C2 (de) * 1980-02-09 1984-09-13 Benteler-Werke Ag Werk Neuhaus, 4790 Paderborn Vorrichtung zur Herstellung eines Rohrkörpers mit Querwellen
US4840053A (en) * 1987-07-29 1989-06-20 Mitsui & Co., Ltd. Method for manufacturing a pipe with projections
US4788843A (en) * 1987-08-14 1988-12-06 R. Seaman Company Method and apparatus for hydraulically forming a tubular body
JPH02290626A (ja) * 1989-04-27 1990-11-30 Nhk Spring Co Ltd 金属ベローズの製造方法および製造装置
US5481892A (en) * 1989-08-24 1996-01-09 Roper; Ralph E. Apparatus and method for forming a tubular member
IT1240233B (it) * 1990-02-02 1993-11-27 Europa Metalli Lmi Procedimento per la realizzazione di elementi monolitici cavi in materiale metallico
US5235836A (en) * 1990-03-06 1993-08-17 Ti Corporate Services Limited Seal head for tube expansion apparatus
DE19622372B4 (de) * 1996-06-04 2006-06-01 Htm Härtetechnik & Metallbearbeitung Gmbh Verfahren und Vorrichtung zum Herstellen von Nockenwellen

Also Published As

Publication number Publication date
US6044678A (en) 2000-04-04
EP0941780A1 (fr) 1999-09-15
ES2163312T3 (es) 2002-01-16
PT941780E (pt) 2002-05-31
DE19810422C1 (de) 1999-08-12

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