EP2138246B1 - Tube réalisé a partir d'un flan et procédé de fabrication d'un tel tube - Google Patents

Tube réalisé a partir d'un flan et procédé de fabrication d'un tel tube Download PDF

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Publication number
EP2138246B1
EP2138246B1 EP09163818A EP09163818A EP2138246B1 EP 2138246 B1 EP2138246 B1 EP 2138246B1 EP 09163818 A EP09163818 A EP 09163818A EP 09163818 A EP09163818 A EP 09163818A EP 2138246 B1 EP2138246 B1 EP 2138246B1
Authority
EP
European Patent Office
Prior art keywords
tube
blank
strip
edges
edge
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.)
Active
Application number
EP09163818A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2138246A1 (fr
Inventor
Georges Teixeira
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.)
Noiseene D'outillage De Presse Ste
Original Assignee
Noiseene D'outillage De Presse Ste
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 Noiseene D'outillage De Presse Ste filed Critical Noiseene D'outillage De Presse Ste
Priority to SI200930028T priority Critical patent/SI2138246T1/sl
Priority to PL09163818T priority patent/PL2138246T3/pl
Publication of EP2138246A1 publication Critical patent/EP2138246A1/fr
Application granted granted Critical
Publication of EP2138246B1 publication Critical patent/EP2138246B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21C37/10—Making tubes with seams being neither welded nor soldered, e.g. riveted seams
    • 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
    • B21C37/10—Making tubes with seams being neither welded nor soldered, e.g. riveted seams
    • B21C37/108—Making tubes with seams being neither welded nor soldered, e.g. riveted seams without continuous longitudinal movement of the sheet during the bending operation
    • 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
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/10—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes
    • B21D5/12—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles for making tubes making use of forming-rollers

Definitions

  • the invention relates to a tube according to the preamble of claim 1 (see eg BE-A-525 415 ), made from a plastically deformable material, such as metal, in the form of a blank or a strip.
  • Tubes of this type are already known, which have the characteristic characteristic that the longitudinal edges facing the tube are joined by a welding bead to give the tube rigidity and resistance against mechanical stresses. These tubes have the disadvantage that the welding operation after the formation of the tube is a relatively delicate additional operation and thus makes more expensive the manufacturing process of such tubes.
  • the invention aims to overcome this disadvantage.
  • the invention is characterized in that the tube comprises at least one fastening lug or other member, which is made in the form of an outgrowth of the folded area of a tube edge.
  • the two edges are folded.
  • the fold is made either inwardly or outwardly of the section of the tube.
  • the section of the tube is uniform over its entire length.
  • a tube 1 according to the invention has the feature that it is made from a blank made of plastically deformable material, in particular a blank sheet of steel, by stamping or profiling and that the edges 2 facing the tube, which extend substantially longitudinally, therefore at least approximately parallel to a longitudinal axis of the tube, are formed by folding a zone of matter towards the body of the tube, or inwards, as shown by Figures 1 and 2 outward, in accordance with the figure 3 , thus forming flanges 3.
  • the tube is open over its entire length, it still has good rigidity and resistance against any type of mechanical stress due to the flanges 3.
  • edges with their edges 3 evolves according to the resistance to be achieved.
  • the edges may have different shapes and the flanges 3 are not necessarily flat and glued against the main section of the tube.
  • the flanges 3 of a tube 100 may be extended by protrusions in the form of fastening lugs 5 and 6, obtained by folding the section towards the outside. of the tube, at the free outer edge 7 of a flange 3.
  • the rim of the tube 200 may be in the form of a continuous strip which extends over the entire length or only a part thereof.
  • the rim could also be discontinuous along the length of the tube.
  • the tube may still have several areas struck, punched or cut in various places. Both ends of the tube may be straight or have different shapes.
  • the tubes according to the invention are particularly well suited for use in the domain of the automobile and can be used very advantageously for the production of dashboard crossmembers, door stiffeners, shock impactors, shock absorbers, beams, crossbars front and rear bumpers and the like. Both ends of the tube may be straight, as shown in the drawings, or have an evolutionary shape.
  • a tube according to the invention is made by stamping from a blank, for example a steel sheet.
  • a blank for example a steel sheet.
  • the pieces or blanks of sheet metal are cut from a strip of steel which is unwound from a not shown reel and brought to the automatic press whose figure 5 schematically shows the structure by a view from above.
  • This press which carries the general reference 10 comprises a number of sectors of workstations each of which performs a specific function and each blank or piece of sheet metal passes through successively.
  • the blanks cut from the original and successively converted into a tube hang up to each other in order to be able to ensure a precisely controlled transport, step by step, of a tool sector to the other and within each sector from one workstation to another.
  • the strip of steel for example 12 noted comprises along its longitudinal edges transport control points 13 regularly distributed, each between two blanks and then tubes being formed. It can be seen that even after cutting a blank, it remains connected to the previous blank and the next blank by a material bridge 14 at a control point 13.
  • the press 10 comprises, in the direction of travel of the band 12 indicated by an arrow F, first of all a cutting sector 15 blanks in the band, which, in the example shown, comprises two cutting stations.
  • the press makes two rectilinear cuts perpendicular to the X axis of the strip, each starting from the place which will subsequently constitute a front end of the tube, of a predetermined length in the direction of the axis, the part between these two cuts remaining intact.
  • the next cutting station 18 cuts the remaining portions of the blank contour, except for the bridges 14, as indicated by the cutting lines of the front ends 19 parallel to the direction of travel of the web and the cutting line 20 of the area between the two cuts 17 made at the first station.
  • the cutting sector 15 succeeds a vacuum station 22 in which the blank noted now 23, is completely cut, of course with the exception of the bridges 14 of attachment.
  • the press then comprises, in the example shown, a bending post sector 26, which comprises two bending stations 27, 28 and a crushing bending station 29.
  • the edges 3 are folded in this position at an angle slightly greater than 90 °.
  • the flanges are bent to an angle of about 145 ° and at the third bending crimping station 29, the flanges 3 are entirely folded and pressed against the upper surface of the blank 23.
  • the bending sector 25 follows the driving sector 32. In this sector, which comprises three rolling stations 33, 34, 35 the blank 23 with the folded edges 3 is transformed into a cylindrical tube as shown in the figure 1 .
  • the invention makes it possible to give the edges facing the tube any desired shape.
  • the invention makes it possible to provide on the tube fastening lugs of other members, such as lugs 5 and 6, which are made in the stamping press.
  • fastening lugs do not need to be attached to the tube, after its manufacture, during an additional operation, for example by welding.
  • the figure 7 represents a tube 200 according to a second variation of embodiment of the invention.
  • the tube 200 is made, like the tube 100, from a blank made of a plastically deformable material, especially a sheet steel blank, by stamping or profiling and with fixing lugs 5, 6.
  • the tube 200 differs from the tube 100 in that it comprises a flange 3A from which are formed fastening lugs 5, 6 and a flange 3B with notches or cuts corresponding to the material necessary to form the fastening lugs 5, 6.
  • the figure 8 schematically represents how this variant embodiment affects the cutting blanks in a steel strip.
  • Two successive blanks 201, 202 are cut with an edge 2A having protrusions giving the fixing lugs 5, 6 and with an edge 2B having cutouts 51, 61 corresponding to the material of the legs 5, 6. It is therefore clearly visible that the second embodiment allows to cut, to dimensions of the tube and legs equal, from a given steel roll, many more tubes 200 than 100 tubes.
  • the figure 9 represents steps (a) to (g) of the production of a tube 100 or 200 according to the invention. As schematically shows figure 9 it is sufficient to configure the fastening lugs 5, 6 appropriately with respect to the fold 3, before the bending operation to have the shape of the fastening lugs 5 or 6 according to the figure 4 or the figure 7 .
  • the invention also makes it possible to provide on the tube, a piece, tabs at the front ends by a suitable cut of the blank and the shaping of these tabs before the rolling operation of the blank to obtain the open tube according to the invention .
  • the figure 10 illustrates, by way of example, the application of the invention for producing a dashboard cross member of a vehicle.
  • the crossbar comprises two tubes according to the invention, namely a tube 1 without mounting tabs and a tube 200 with mounting tabs mounting in the vehicle environment.
  • the figure 11 shows for different tube configurations, the relationship between the stiffness of the tube under the effect of contact force, as a function of time. On the ordinate of this figure is reported the contact energy EC while the axis 6 is the axis of the flow of time t.
  • the rigidity calculations that allowed the tubes to be made were made using RADIOSS naming software.
  • the figure 11 shows four curves: in A the curve of a tube according to the invention whose rim is folded on the outside of the tube, in B the curve of a tube according to the invention with the fold inwards, in C the curve of a tube obtained from a blank but closed by a weld bead and at D the curve of an open tube without a flange.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Glass Compositions (AREA)
  • Resistance Heating (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP09163818A 2008-06-27 2009-06-25 Tube réalisé a partir d'un flan et procédé de fabrication d'un tel tube Active EP2138246B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200930028T SI2138246T1 (sl) 2008-06-27 2009-06-25 Iz ravnega surovca izdelana cev in postopek izdelave tovrstne cevi
PL09163818T PL2138246T3 (pl) 2008-06-27 2009-06-25 Rura wytwarzana z półwyrobu płaskiego i sposób wytwarzania takiej rury

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0854345A FR2933014B1 (fr) 2008-06-27 2008-06-27 Tube realise a partir d'un flan

Publications (2)

Publication Number Publication Date
EP2138246A1 EP2138246A1 (fr) 2009-12-30
EP2138246B1 true EP2138246B1 (fr) 2011-04-27

Family

ID=40292465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09163818A Active EP2138246B1 (fr) 2008-06-27 2009-06-25 Tube réalisé a partir d'un flan et procédé de fabrication d'un tel tube

Country Status (8)

Country Link
EP (1) EP2138246B1 (pl)
AT (1) ATE507016T1 (pl)
DE (1) DE602009001142D1 (pl)
ES (1) ES2363801T3 (pl)
FR (1) FR2933014B1 (pl)
PL (1) PL2138246T3 (pl)
PT (1) PT2138246E (pl)
SI (1) SI2138246T1 (pl)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE525415A (pl) *
CH341520A (de) * 1955-01-21 1959-10-15 Morris Motors Ltd Verfahren zur Herstellung von Flachrohren aus Aluminium oder einer Leichtmetallegierung für Röhren-Wärmeaustauschern
NL6402439A (pl) * 1964-03-10 1965-09-13
FR2673589B1 (fr) * 1991-03-04 1993-07-09 Nacan Tube-corps de colonne de direction pour vehicule automobile.
JP2003190282A (ja) * 2001-12-27 2003-07-08 Terumo Corp 金属製の管状体およびその製造方法

Also Published As

Publication number Publication date
PL2138246T3 (pl) 2011-09-30
FR2933014A1 (fr) 2010-01-01
EP2138246A1 (fr) 2009-12-30
FR2933014B1 (fr) 2011-04-22
ES2363801T3 (es) 2011-08-17
PT2138246E (pt) 2011-07-28
ATE507016T1 (de) 2011-05-15
DE602009001142D1 (de) 2011-06-09
SI2138246T1 (sl) 2011-09-30

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