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EP0788848A1 - Procédé pour la fabrication d'un tube à section transversale variable - Google Patents

Procédé pour la fabrication d'un tube à section transversale variable Download PDF

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Publication number
EP0788848A1
EP0788848A1 EP97101610A EP97101610A EP0788848A1 EP 0788848 A1 EP0788848 A1 EP 0788848A1 EP 97101610 A EP97101610 A EP 97101610A EP 97101610 A EP97101610 A EP 97101610A EP 0788848 A1 EP0788848 A1 EP 0788848A1
Authority
EP
European Patent Office
Prior art keywords
section
tube
shaping
forming section
base region
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
EP97101610A
Other languages
German (de)
English (en)
Other versions
EP0788848B1 (fr
Inventor
Wolfgang Streubel
Udo Klasfauseweh
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 Deutschland GmbH
Original Assignee
Benteler Deutschland 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 Deutschland GmbH filed Critical Benteler Deutschland GmbH
Publication of EP0788848A1 publication Critical patent/EP0788848A1/fr
Application granted granted Critical
Publication of EP0788848B1 publication Critical patent/EP0788848B1/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, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
    • B21C37/185—Making tubes with varying diameter in longitudinal direction conical tubes starting from sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
    • B21C37/065—Manufacture of metal sheets, rods, wire, tubes, profiles 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 starting from a specific blank, e.g. tailored blank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles 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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes

Definitions

  • the invention relates to a method for producing a tube with sections of different cross-sectional configurations.
  • Welded tubes are formed from steel strip or blanks into tubes and then welded along their joints. This creates hollow bodies with a round cross-section.
  • Pipes with cross-sectional extensions at the ends are often required. These widenings are produced by mechanical widening, in that the pipe end is widened with the aid of a mandrel by tensile and / or compressive forces.
  • the cross-sectional extensions that can be achieved are however limited by the deformability of the material used. Accordingly, only comparatively small changes in geometry can be made.
  • the expansion of the material structure in the expansion area frequently also occurs as a result of the expansion. This is undesirable in many cases because the hardening reduces the material's ability to change shape.
  • a complex annealing treatment is then necessary to eliminate the structural change in order to ensure a ductility of the widened pipe ends that is sufficient for subsequent processing steps.
  • the invention is based on the object of making a method for producing a tube with sections of different cross-sectional configuration simpler and more economical, in particular also improving the possibilities in the design of the tube configuration.
  • a board is first provided, which has a rectangular base region, on the at least one forming section is integrated in one piece.
  • the circuit board is the true-to-length development of the outer circumferential surface of the pipe to be produced, including any surfaces that protrude over the circumference of the pipe as tabs or the like.
  • the board is formed into a hollow cylindrical body. This involves a tubular shaping of the base area and a spiral shaping of the shaping section. The longitudinal edges of the base area then lie exactly against one another, while the blank is wound up in the forming section with partially overlapping areas.
  • This forming process can be carried out economically and with high accuracy in a die, the blank being first made into a semicircular profile in a first partial step and into the hollow cylindrical shape in a further partial step.
  • the final shaping can be a widening of the forming section with an active medium acting from the inside, for example a mandrel. If a tab projecting from the circumference of the tube is to be formed, the shaping section only needs to be directed into the corresponding position.
  • the joints are connected in the subsequent joining process. This is usually done by welding. Various methods are available for this, such as laser, shielding gas, inductive or resistance welding.
  • the method according to the invention is particularly well suited for the production of a tube with a frustoconical cross-sectional widening at at least one end.
  • a circuit board with a rectangular base region is then used, which is followed at one end by a shaping section of a trapezoidal configuration.
  • the circuit board is symmetrical along its longitudinal plane. The board is the development of the outer surface of the pipe to be manufactured.
  • the final shaping of the tube is carried out by expanding the spiral-shaped forming section in a trumpet-like manner. This is expediently done in a suitable die by thorning out the end region so that it unwinds completely and the final geometry of the stepped tube is achieved. This is followed by the welding of the butt edges.
  • a ramp-like sliding area can be assigned to the forming section. This is particularly advantageous if several forming sections of different geometries are linked together.
  • a sliding area can be formed, for example, by providing a short trapezoidal extension as an auxiliary surface at the front end of the board. This auxiliary surface ensures that a problem-free rolling up of the board is possible due to the initially point-like contact.
  • a further advantageous measure according to claim 6 is that the blank is provided with blank thicknesses which change in certain regions in the rolling direction before the forming by a specific rolling deformation. If necessary, the rolled blank is trimmed as required before it is sent for further processing.
  • the use-specifically shaped board has deliberately varying board thicknesses, in order to convey various areas precisely to the wall thicknesses corresponding to the later use of the tube made from the board, which are matched to the respective loads and thus also the locally differing voltage peaks that these areas have in practice Subject to use.
  • a pipe can be produced with sections of different cross-sectional configuration and sections of different wall thickness.
  • the area-reduced wall thickness is particularly suitable for the production of components that are under external stress, but in which the stresses that occur due to the component design are distributed over the component at different heights. This is often the case, in particular, with components of motor vehicles. If such components are designed according to the maximum load, this inevitably leads to oversizing in less stressed areas. This not only results in a higher use of materials, but also in unnecessary weight.
  • the rolling direction can be adapted to the particular configuration of the later pipe.
  • the starting boards can also be partially rolled twice or, if necessary, several times in different directions.
  • the respective thickness can also be varied in stages as required.
  • the rolling is expediently carried out in a two-roll stand.
  • FIG. 1 shows a section of a circuit board 1 which is used to produce a tube which is expanded at the end.
  • the circuit board 1 has a rectangular base region 2, which is followed by a trapezoidal forming section 3.
  • the plate 1 is symmetrical with respect to its central longitudinal axis MLA and represents the true-to-length development of the pipe to be produced.
  • the blank 1 is formed into a hollow cylindrical body.
  • the forming section 3 is rolled up in a spiral, as shown in FIG. 2. Here there is an overlap of the forming section 3 in the areas 4 and 5.
  • the base region 2 is formed into a tubular shape.
  • the longitudinal edges 6 and 7 of the base region 2 are then opposite one another.
  • the hollow cylindrical body is fixed in a suitable die and the forming section 3 is thorned out, whereby it is converted into the final frustoconical geometry. Due to the blank cut precisely adapted to the tube shape, an exact contact of the longitudinal edges 8 and 9 of the forming section 3 and the longitudinal edges 6, 7 of the base region 2 is achieved.
  • the tube is finished by welding the longitudinal edges 6, 7 or 8, 9.
  • FIG. 4 shows the end section of a tube 10 with a cylindrical middle section 11, which is followed by a frustoconical length section 12 and a cylindrical length section 13.
  • the tube 10 is formed symmetrically to the central longitudinal axis MLA.
  • the circuit board 14 which is used to manufacture the tube 10, is shown in dashed lines.
  • the circuit board 14 is the development of the lateral surface of the tube 10.
  • the rectangular base region 11 ' can be seen, to which a trapezoidal forming section 15 and another rectangular forming section 16 are connected. Due to the adapted blank cut an exact contact of the joints 17, 17 ', 18, 18', 19, 19 'on the end-shaped tube 10 is achieved.
  • FIG. 5 shows a circuit board 20 with a rectangular base region 21 and a trapezoidal one formed forming section 22 and a further rectangular forming section 23.
  • a ramp-like sliding area 26 is formed.
  • the sliding area 26 is formed by a short trapezoidal extension 27.
  • the approach 27 acts as an auxiliary surface and ensures that the roll-up process of the circuit board 20 can take place without problems due to the initially point-like contact.
  • FIG. 6 Another solution to support the reeling process is shown in FIG. 6.
  • a sliding area 28 is realized by a changeover 29 on a butt edge 30 of a forming section 31.
  • FIG. 1 A shoulder 34, consisting of a frustoconical transition section 35 and a cylindrical longitudinal section 36, adjoins the cylindrical central section 33.
  • Another shoulder 37 is formed by the frustoconical length section 38 and the cylindrical length section 39.
  • FIGS. 8 to 11 show a tube 40 with a holder 42 protruding from the circumference 41.
  • the holder 42 is arranged in the middle region 43 of the tube 40.
  • a board with a rectangular base region, to which the holder 42 is attached as a forming section 44 is again assumed.
  • the board is then rolled up, so that the situation shown in Figure 10 results.
  • the forming section 44 is in some areas on the outer surface 45 of the tube 40.
  • the shaping section 44 is brought into the desired position in a suitable manner, so that the holder 42 results.
  • FIG. 12 shows a section of a blank 48, in which areas 49 to 52 have been stretched by a specific rolling deformation, with blank thicknesses s 1 to s 4 changing in the rolling direction WR.
  • the areas 49-52 merge seamlessly into one another.
  • the circuit board 48 has an approximately smooth surface 57 on the underside 56. Of course, the board 48 can also be stretched on both sides.
  • the areas 50-52 are part of a rectangular base area 58 of the circuit board 48.
  • the area 49 has a trapezoidal configuration and forms the shaping section 59, which is integrally attached to the base area 58.
  • a tube can be produced from the board 48 with sections of different cross-sectional configurations and sections of different wall thicknesses s 1 to s 4 .
  • the regions 49-52 have exactly those circuit board thicknesses s 1 to s 4 which are matched to the respective loads and tensions to which the regions 49-52 are subject in the practical use of the tube produced from the circuit board 48 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
EP97101610A 1996-02-07 1997-02-03 Procédé pour la fabrication d'un tube à section transversale variable Expired - Lifetime EP0788848B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19604368 1996-02-07
DE19604368A DE19604368C2 (de) 1996-02-07 1996-02-07 Verfahren zur Herstellung eines Rohrs mit Abschnitten unterschiedlicher Querschnittskonfiguration

Publications (2)

Publication Number Publication Date
EP0788848A1 true EP0788848A1 (fr) 1997-08-13
EP0788848B1 EP0788848B1 (fr) 2000-12-27

Family

ID=7784711

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97101610A Expired - Lifetime EP0788848B1 (fr) 1996-02-07 1997-02-03 Procédé pour la fabrication d'un tube à section transversale variable

Country Status (5)

Country Link
US (1) US5836189A (fr)
EP (1) EP0788848B1 (fr)
DE (1) DE19604368C2 (fr)
ES (1) ES2155637T3 (fr)
PT (1) PT788848E (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1537922B1 (fr) * 2003-12-04 2009-02-25 HONDA MOTOR CO., Ltd. Fabrication de profilés avec une section variable dans la direction longitudinale

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6220537B1 (en) * 1997-03-07 2001-04-24 Daiwa Seiko, Inc. Fishing spinning reel having smoothly shaped rail portion
DE10135411C2 (de) * 2001-07-25 2003-05-28 Gfu Ges Fuer Umformung Und Mas Verfahren zur Herstellung von Gasverteilerrohren, insbesondere für Fahrzeug-Airbags
US20040250404A1 (en) * 2003-01-14 2004-12-16 Cripsey Timothy J. Process for press forming metal tubes
CA2526929A1 (fr) * 2003-05-08 2004-11-25 Prototube, Inc. Procede pour la formation sous pression de tubes metalliques
US20060096099A1 (en) * 2003-05-08 2006-05-11 Noble Metal Processing, Inc. Automotive crush tip and method of manufacturing
DE102004017343A1 (de) * 2004-04-06 2005-11-03 Muhr Und Bender Kg Verfahren zur Herstellung von Profilen mit in Längsrichtung veränderlichem Querschnitt
EP1586391A1 (fr) * 2004-04-13 2005-10-19 Corus Staal BV Ebauche tubulaire et procédé de fabrication d'une ébauche tubulaire
EP1586390A1 (fr) * 2004-04-13 2005-10-19 Corus Staal BV Ebauche tubulaire et procédé de fabrication d'une ébauche tubulaire
DE202004014874U1 (de) * 2004-09-22 2004-11-18 Benteler Automobiltechnik Gmbh Hohlbauteil für eine Fahrwerkskomponente
DE102005011764A1 (de) * 2005-03-11 2006-09-14 Muhr Und Bender Kg Rohre mit integriertem Flansch, insbesondere aus flexibel gewalztem Material, für Fahrwerk- und Karosseriestrukturteile
JP2007263080A (ja) * 2006-03-29 2007-10-11 Toyota Motor Corp 段付きチューブの製造方法
DE102007023173A1 (de) 2007-05-22 2008-11-27 Benteler Automobiltechnik Gmbh Verfahren zur Bearbeitung der Enden von Rohren
JP4925470B2 (ja) * 2008-07-01 2012-04-25 雅幸 井爪 印刷機用版製造装置
DE102008033114A1 (de) * 2008-07-15 2010-01-21 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Herstellung eines Rohrs
DE102010027093A1 (de) 2010-07-13 2012-01-19 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Hohlprofils aus Metall
CA2868973C (fr) * 2012-04-02 2016-11-01 Jfe Steel Corporation Tube en acier uoe et structure
CN104275365B (zh) * 2013-07-10 2016-09-14 祥伟自动科技股份有限公司 空心阶管的制造方法
JP6456024B2 (ja) * 2014-01-31 2019-01-23 キヤノン株式会社 ローラ、カートリッジ、画像形成装置、及び筒状軸の製造方法
CN115156347B (zh) * 2022-07-26 2025-04-15 东风汽车集团股份有限公司 一种不等截面管梁的成型方法及模具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648008A (en) * 1968-12-11 1972-03-07 Nippon Kokan Kk Method of making tapered poles
JPS6037219A (ja) * 1983-08-11 1985-02-26 Nippon Steel Corp 管長手方向に肉厚差をもった金属管の製造方法
DE3802445A1 (de) * 1988-01-28 1989-08-10 Kurt Dr Ing Gruber Stahlband zur herstellung geschweisster stahlrohre
JPH03291115A (ja) * 1990-04-04 1991-12-20 Sango:Kk 板材から軸芯が屈曲するテーパ管を製造する方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE104875C (fr) *
US4455855A (en) * 1982-01-25 1984-06-26 Kabushiki Kaisha Sanyo Seiki Forming rolls of pipe-producing apparatus
DE9116427U1 (de) * 1991-12-18 1992-11-26 Welser Profile Ag, Ybbsitz Hohlprofil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648008A (en) * 1968-12-11 1972-03-07 Nippon Kokan Kk Method of making tapered poles
JPS6037219A (ja) * 1983-08-11 1985-02-26 Nippon Steel Corp 管長手方向に肉厚差をもった金属管の製造方法
DE3802445A1 (de) * 1988-01-28 1989-08-10 Kurt Dr Ing Gruber Stahlband zur herstellung geschweisster stahlrohre
JPH03291115A (ja) * 1990-04-04 1991-12-20 Sango:Kk 板材から軸芯が屈曲するテーパ管を製造する方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 16, no. 129 (M - 1228) 2 April 1992 (1992-04-02) *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 164 (M - 395) 10 July 1985 (1985-07-10) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1537922B1 (fr) * 2003-12-04 2009-02-25 HONDA MOTOR CO., Ltd. Fabrication de profilés avec une section variable dans la direction longitudinale

Also Published As

Publication number Publication date
PT788848E (pt) 2001-04-30
EP0788848B1 (fr) 2000-12-27
ES2155637T3 (es) 2001-05-16
US5836189A (en) 1998-11-17
DE19604368A1 (de) 1997-08-14
DE19604368C2 (de) 1999-12-30

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