EP2106306B1 - Dispositif pour cintrer un tube metallique par enroulement sur un galet de forme - Google Patents

Dispositif pour cintrer un tube metallique par enroulement sur un galet de forme Download PDF

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Publication number
EP2106306B1
EP2106306B1 EP07857411A EP07857411A EP2106306B1 EP 2106306 B1 EP2106306 B1 EP 2106306B1 EP 07857411 A EP07857411 A EP 07857411A EP 07857411 A EP07857411 A EP 07857411A EP 2106306 B1 EP2106306 B1 EP 2106306B1
Authority
EP
European Patent Office
Prior art keywords
roller
tube
ring
shape
crumple
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.)
Not-in-force
Application number
EP07857411A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2106306A1 (fr
Inventor
Jérôme CAMUS
Bernard Crapet
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP2106306A1 publication Critical patent/EP2106306A1/fr
Application granted granted Critical
Publication of EP2106306B1 publication Critical patent/EP2106306B1/fr
Not-in-force 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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • 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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
    • B21D9/07—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only
    • B21D9/073—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only with one swinging forming member

Definitions

  • the present invention relates to a device for bending a metal tube by winding on a shaped roller.
  • the device according to the invention is particularly applicable to the bending of metal exhaust pipes for motor vehicles.
  • the device comprises a shaped roller 1 to obtain the desired bending radius comprising a peripheral groove adapted to receive the tube 2, a mandrel 3 adapted to be introduced into the tube to be bent 2, a cooperating eraser 4 with the tube to be bent and the shape of the roller 1 to prevent the formation of folds on the intrados of the bent portion of the tube 2, means for putting the tube 2 in abutment against the shape of the roller 1 and the wrinkle-erase 4 and means for winding the tube 2 on the shaped roller 1 according to the desired bending angle.
  • the mandrel 3 serves to prevent flattening of the tube 2 during bending.
  • the means for pressing the tube 2 against the roller 1 comprises a clamping shoe 5 engageable with the tube 2 and resting on a form insert 6 integral in rotation with the roller 1.
  • the bending device In the position shown on the figure 1 , the bending device is at rest, the tube 2 is in position under the roller 1 and the shaped insert 6 and the mandrel 3 is engaged in the tube 2.
  • the clamping shoe 5 is spaced from the tube 2 and the form insert 6.
  • the roller 1 has been rotated about its axis by driving with it, the shaped insert 6 and the clamping shoe 5 thereby achieving the bending of the tube 2 around the roller 1.
  • the wrinkle-wiper 4 prevents the formation of folds on the intrados of the bent part of the tube 2.
  • the above bending device makes it possible to obtain excellent tube bending quality.
  • the wrinkle-remover avoids the formation of folds on the intrados of the bent part of the tubes.
  • the object of the present invention is in particular to remedy this drawback.
  • a device for bending a metal tube by winding comprising a shaped roller to obtain the desired bending radius having a peripheral groove adapted to receive the tube, a mandrel adapted to be introduced into the bending tube, a fold erase cooperating with the tube to be bent and the shape roller to prevent the formation of folds on the intrados of the bent part of the tube, means for putting the tube in abutment against the shape roller and the wrinkle-wiper and means for winding the tube on the shaped roller according to the desired bending angle, characterized in that the shaped roller comprises a ring housed concentrically in the roller, in free rotation relative to the ci, this ring being located at the bottom of the peripheral groove of the roller and one end of the erase-folds bearing on the outer surface of said ring.
  • the wrinkle-erase is supported on a ring which is itself mounted free to rotate relative to the roller, so that, when the rotation of the roller, the ring remains motionless and there is no friction between it and the wrinkle-wrinkle.
  • the roller is in two parts axially connected to one another, the ring being located between these two roller parts.
  • This two-part arrangement of the roller allows easy mounting of the ring.
  • the inner face of a first roller portion has an annular shoulder on which the ring is freely engaged, the second roller portion having a flat inner face bearing against a flat surface of the first roller portion.
  • the above shoulder of one of the roller parts serves as a seat for the roller and this seat can rotate freely relative to the ring.
  • the ring can thus remain motionless with respect to the wrinkle-erase resting on it.
  • the two roller parts are made integral in rotation by means of a key and tightened against each other by means of screws.
  • the wrinkle erase is a rectilinear bar-shaped part, one end of which bears tangentially on the ring and the opposite end of which is removably attached to a wrinkle-erase support.
  • This piece is thus easy to machine and replace.
  • the wrinkle eraser has a flat face intended to bear on the ring and an opposite curved face adapted to the curvature of the tube to be bent.
  • the wrinkle-wiper has a curved face intended to bear on an outer surface of complementary shape of the ring and an opposite curved face of the same shape as the first face adapted to the curvature of the tube to be bent.
  • the wrinkle erase can be obtained by cutting a tube along the generatrices thereof.
  • the peripheral profile of the two roller parts defining the receiving groove of the tube to be bent has two plane annular surfaces having different inclination angles and connected to each other by an annular recess.
  • This embodiment is less expensive than torus-shaped machining of the peripheral groove of the rollers.
  • each roller portion has on its periphery a notch for receiving a shaped insert having a receiving groove of the tube extending tangentially to that of the roller, said notch comprising a guide rail of the shape insert extending perpendicularly to the axis of the roller.
  • the shaped roller 1 comprises a ring 7 housed concentrically in the roller 1, in free rotation relative thereto.
  • This ring 7 is located at the back of the throat device 8 (see figure 10 ) of the roller 1 and one end of the wrinkle-erase 9 bears on the outer surface of the ring 7.
  • roller 1 is in two parts 1a, 1b axially connected to one another, the ring 7 being located between these two roller parts 1a, 1b.
  • the figure 10 shows, furthermore, that the inner face of a first roller portion 1a has an annular shoulder 1c on which the ring 7 is freely engaged, the second roller portion 1b having a flat inner face 1d resting against a flat surface of the first part of roller 1a.
  • the two roller parts 1a, 1b are made integral in rotation by means of a key (not shown) and tightened against each other by means of screws.
  • the Figures 7 to 9 show that the wrinkle erase 9 is a rectilinear bar-shaped piece, one end of which bears tangentially on the ring 7 and whose opposite end is removably attached to a wrinkle-erase support 10.
  • the wrinkle-erase 9 has a flat face 9a intended to bear on the ring 7 and an opposite curved face 9b adapted to the curvature of the tube 2 to be bent.
  • the erase-fold has a curved face 9c intended to bear on an outer surface of complementary shape of the ring 7 and an opposite face 9d curved of the same shape as the first face 9c adapted to the curvature of the tube 2 to be bent.
  • the wrinkle-erase shown on the figure 12 can be obtained by cutting a tube 11 along generatrices 12 thereof, as shown by FIG. figure 13 , which reduces manufacturing costs.
  • the groove 8 defined by the two roller parts 1a, 1b for receiving the tube 2 may have a toric profile adapted to the diameter of the tube.
  • the figure 14 shows a roller part 1b whose peripheral profile defining a portion of the groove, has two planar annular surfaces 8a, 8b having different angles of inclination and connected to each other by an annular recess 8c.
  • a throat profile is more economical to machine than a toric profile.
  • each roller portion such as 1b has on its periphery a notch 13 for receiving a shape insert 6 (see Figures 7 to 9 ) having a groove 14 for receiving the tube 2 extending tangentially to that of the roller 1.
  • said notch 13 comprises a slide 15 for guiding the shaped insert 6 extending perpendicularly to the axis of the roller 1.
  • This slide 15 serves to guide the tube 2 engaged in the groove of the insert 6 in the axis of the roller 1 while pinching the two parts of roller 1a, 1b against each other.
  • the wear of the wrinkle eraser 9 is thus considerably reduced.
  • the wrinkle erase 9 can be used during a very large number of pipe bending operations before being replaced.
  • the device that has just been described is particularly well suited to the bending of automobile exhaust pipes.
  • this device can of course also apply to the bending of steel or other metal tubes in other applications than the automobile.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP07857411A 2006-12-19 2007-12-11 Dispositif pour cintrer un tube metallique par enroulement sur un galet de forme Not-in-force EP2106306B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0611062A FR2909910B1 (fr) 2006-12-19 2006-12-19 Dispositif pour cintrer un tube metallique par enroulement sur un galet de forme.
PCT/EP2007/063724 WO2008074698A1 (fr) 2006-12-19 2007-12-11 Dispositif pour cintrer un tube metallique par enroulement sur un galet de forme

Publications (2)

Publication Number Publication Date
EP2106306A1 EP2106306A1 (fr) 2009-10-07
EP2106306B1 true EP2106306B1 (fr) 2010-04-21

Family

ID=38283917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07857411A Not-in-force EP2106306B1 (fr) 2006-12-19 2007-12-11 Dispositif pour cintrer un tube metallique par enroulement sur un galet de forme

Country Status (6)

Country Link
EP (1) EP2106306B1 (es)
AT (1) ATE464957T1 (es)
DE (1) DE602007006057D1 (es)
ES (1) ES2340440T3 (es)
FR (1) FR2909910B1 (es)
WO (1) WO2008074698A1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105382064A (zh) * 2015-12-04 2016-03-09 重庆长安空港汽车配件有限责任公司 一种弯管机及其组合防皱板
IT201800010409A1 (it) * 2018-11-16 2020-05-16 Cml Int S P A Macchina per curvare un pezzo allungato senza formazione di grinze
CN113926951A (zh) * 2021-10-20 2022-01-14 中国建筑第二工程局有限公司 用于预制柱与现浇梁板穿插的钢筋折弯装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3696913B2 (ja) * 1995-01-13 2005-09-21 株式会社オプトン 曲げ加工装置
DE10124866A1 (de) * 2001-05-22 2002-12-05 Peter Schuele Werkzeug für Biegemaschine
JP3725842B2 (ja) * 2002-03-15 2005-12-14 カルソニックカンセイ株式会社 パイプ曲げ加工装置およびパイプ曲げ加工方法
JP4031827B2 (ja) * 2002-10-10 2008-01-09 三桜工業株式会社 二重管の曲げ方法

Also Published As

Publication number Publication date
DE602007006057D1 (de) 2010-06-02
FR2909910A1 (fr) 2008-06-20
FR2909910B1 (fr) 2009-01-30
EP2106306A1 (fr) 2009-10-07
ATE464957T1 (de) 2010-05-15
WO2008074698A1 (fr) 2008-06-26
ES2340440T3 (es) 2010-06-02

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