EP0788849B1 - Verfahren zur Herstellung von Rohren mit Abschnitten unterschiedlicher Wanddicke - Google Patents

Verfahren zur Herstellung von Rohren mit Abschnitten unterschiedlicher Wanddicke Download PDF

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Publication number
EP0788849B1
EP0788849B1 EP97101611A EP97101611A EP0788849B1 EP 0788849 B1 EP0788849 B1 EP 0788849B1 EP 97101611 A EP97101611 A EP 97101611A EP 97101611 A EP97101611 A EP 97101611A EP 0788849 B1 EP0788849 B1 EP 0788849B1
Authority
EP
European Patent Office
Prior art keywords
pipe
sections
sheet
tube
thicknesses
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
EP97101611A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0788849A1 (de
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 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 EP0788849A1 publication Critical patent/EP0788849A1/de
Application granted granted Critical
Publication of EP0788849B1 publication Critical patent/EP0788849B1/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
    • B21C37/08—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
    • 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
    • B21C37/065—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 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 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

Definitions

  • the invention relates to the use of tubes with sections different wall thickness for the production of Body parts or chassis components.
  • DE 33 43 709 A1 includes a molding method of frame parts for motor vehicles to the state of Technology in which a metal sheet is initially rolled like this is that parallel depressions are formed. This different wall thicknesses should result from that the roller has differently sized sections Has.
  • a tube is known with in Axial direction different wall thicknesses, which as Structural component is used.
  • the manufacture of the Pipe is made up of different pipe sections Inner diameter that are welded together. This is associated with a high manufacturing effort.
  • the radial welds in the transition areas between the different thicknesses Pipe sections represent potential weak points.
  • the invention is based on the prior art Task based on the production of body parts or chassis components, which are seen along their length exposed to different loads, in material and weight-saving design more economical shape.
  • the object is achieved by the use a pipe with different wall thicknesses in the longitudinal direction having sections for the production of body parts or chassis components of motor vehicles solved, in which first a targeted rolling Deformation of the starting sheet with areas in the rolling direction changing sheet thicknesses have been made is. The rolled sheet is then made to meet requirements circumcised. The resulting intermediate product is then formed into a tube and joined along the edges connected.
  • the tube used has sections in the longitudinal axis direction different wall thickness. This in some areas Reduced wall thickness tube is used for the production of Used components that are under external stress, in which, however, the tensions occurring due to the Component construction distributed over the component in different Height. Examples of so different heavily loaded components are body parts or chassis components of motor vehicles. Will the Components dimensioned according to the maximum load, led so far not only for an unnecessary use of materials, but above all at an unnecessary weight. This Disadvantages are avoided according to the invention in that the pipes used to manufacture the components according to the subsequent load in the individual Areas of the components dimensioned differently are. With this one becomes the expected later Can handle loads and can also use material and thus save weight.
  • a metal sheet is expediently used as the starting material used with one of the greatest wall thickness of the manufacturing pipe corresponding thickness.
  • the starting material with a corresponding Excess are provided.
  • Advantageous the starting material is withdrawn from a coil and for further processing in rolling technology.
  • a targeted partial wall thickness reduction then takes place by rolling.
  • the rolling direction of each Adjust configurations of the later pipe.
  • You can the output sheets twice or possibly several times in partially rolled in different directions.
  • the respective thickness according to the requirements can also be varied step by step.
  • Various Ironing rates and different transition areas between the thicker and thinner areas are possible.
  • the transitions from one sheet thickness range to another can be stepless or stepped.
  • Rolling can take place in a two-roll stand.
  • Variation of the roller geometry in the roller inlet can Symmetry with respect to the median transverse plane in predeterminable Limits are affected.
  • the specifically deformed sheet has deliberately varied ones Cross sections on to diverse according to the application Areas to convey precisely those wall thicknesses which depends on the respective loads and thus also the locally differing voltage peaks are who these areas in practical use get abandoned.
  • this will be Sheet cut to size around the longitudinal axis Formed tube and joined along the joints. This is usually done by welding of bumps. Different methods are available for this Available, for example laser, inert gas, inductive or resistance welding.
  • the rolled sheet can be processed before further processing in parallel to the rolling direction Metal strips are divided. This way from a large output board several tubes of the same Establish configuration.
  • Forming the sheets or strips into tubes can be done in a rolling mill.
  • a another advantageous embodiment provides from the rolled sheets in a die first a semi-circular profile to emboss and then in another Embossing step to finish the tube.
  • a pipe can be divided into shorter ones Length sections are made.
  • FIG. 1 shows a section of a sheet 1 in which areas 2-5 have been ironed out by a targeted rolling deformation with sheet thicknesses s 2 to s 5 that change in the rolling direction WR.
  • transition areas 6, 7 and 8 the areas go 2-5 each by an incline 9, 10, 11 almost continuously into each other.
  • Figure 2 shows a sheet 1 in plan view.
  • the areas 2-5 have such Wall thicknesses that are matched to the respective Loads and voltage peaks, which one from the sheet 1 manufactured tube is subject to or resulting from it result in practical use as a construction component.
  • FIG. 3 shows a sheet 14 which has an asymmetrical geometry, based on its central transverse plane MQ, with areas 15-18 of different sheet thicknesses s 15 -s 16. Both the top 19 and the bottom 20 of the sheet 14 vary accordingly in steps in different ironing rates.
  • the forming of the sheet 14 into a tube is expedient made so that the top 19 the inside of the tube and the bottom 20 the outside of the Tube.
  • the board 21 is placed in a die 22 (FIG 4, above) and charged by a stamp 23 like this is indicated by the arrow F.
  • the board 21 forced into the die form 24 and a semicircular profile 25 coined (Figure 4, middle).
  • the next step is to form a tube 26 in the die form 24 with the help of the stamp 27, the a configuration corresponding to the tube 26 with a counter shape 28 (Figure 4, below).
  • the tube 26 thus finished then stands for the other Processing available. It points in the axial direction with different wall thicknesses. This configuration is precisely tailored for later use of the pipe and the loads and Voltages to which the tube 26 is then subject.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Metal Rolling (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP97101611A 1996-02-07 1997-02-03 Verfahren zur Herstellung von Rohren mit Abschnitten unterschiedlicher Wanddicke Expired - Lifetime EP0788849B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19604357A DE19604357B4 (de) 1996-02-07 1996-02-07 Verfahren zur Herstellung von Rohren mit Abschnitten unterschiedlicher Wanddicke
DE19604357 1996-02-07

Publications (2)

Publication Number Publication Date
EP0788849A1 EP0788849A1 (de) 1997-08-13
EP0788849B1 true EP0788849B1 (de) 2001-05-02

Family

ID=7784706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97101611A Expired - Lifetime EP0788849B1 (de) 1996-02-07 1997-02-03 Verfahren zur Herstellung von Rohren mit Abschnitten unterschiedlicher Wanddicke

Country Status (5)

Country Link
US (1) US5924316A (es)
EP (1) EP0788849B1 (es)
DE (2) DE19604357B4 (es)
ES (1) ES2157493T3 (es)
PT (1) PT788849E (es)

Cited By (1)

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DE102011052153A1 (de) 2011-07-26 2013-01-31 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Kraftfahrzeug-Biegeträgers und Kraftfahrzeug-Biegeträger

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DE102011052153A1 (de) 2011-07-26 2013-01-31 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Kraftfahrzeug-Biegeträgers und Kraftfahrzeug-Biegeträger

Also Published As

Publication number Publication date
DE19604357A1 (de) 1997-08-14
DE59703455D1 (de) 2001-06-07
US5924316A (en) 1999-07-20
ES2157493T3 (es) 2001-08-16
EP0788849A1 (de) 1997-08-13
DE19604357B4 (de) 2004-06-24
PT788849E (pt) 2001-08-30

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