EP0826440A1 - Vorrichtung zum Formen von Metallprofilen - Google Patents

Vorrichtung zum Formen von Metallprofilen Download PDF

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Publication number
EP0826440A1
EP0826440A1 EP97401964A EP97401964A EP0826440A1 EP 0826440 A1 EP0826440 A1 EP 0826440A1 EP 97401964 A EP97401964 A EP 97401964A EP 97401964 A EP97401964 A EP 97401964A EP 0826440 A1 EP0826440 A1 EP 0826440A1
Authority
EP
European Patent Office
Prior art keywords
profile
filling
bending
former
jaws
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
EP97401964A
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English (en)
French (fr)
Other versions
EP0826440B1 (de
Inventor
Jean-Paul Huet
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.)
ACB
Original Assignee
GEC Alsthom ACB
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Filing date
Publication date
Application filed by GEC Alsthom ACB filed Critical GEC Alsthom ACB
Publication of EP0826440A1 publication Critical patent/EP0826440A1/de
Application granted granted Critical
Publication of EP0826440B1 publication Critical patent/EP0826440B1/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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • 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
    • B21D9/15—Bending tubes using mandrels or the like using filling material of indefinite shape, e.g. sand, plastic material
    • 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
    • B21D26/047—Mould construction
    • 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
    • B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
    • 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
    • B21D9/08—Bending tubes using mandrels or the like in press brakes or between rams and anvils or abutments; Pliers with forming dies

Definitions

  • the present invention relates to equipment for forming of metal profiles.
  • the object of the present invention is to provide a equipment that performs on a forming machine by stretching, not only the bending operation of the streamlined but also a hydroforming operation and this successively or simultaneously and without requiring subsequent cleaning of the profile.
  • the invention therefore relates to equipment for forming metal profiles on a bending machine by stretching on which a profile to be formed is taken at its ends by jaws linked to drawing cylinders and to bending means against a convex shape fixed on a machine tool table, characterized in that it includes a counterform and means for applying it against said shape once the profile is bent against form, a filling piece of elastic material being intended to be placed inside said profile and means being provided for subjecting said piece of filling at a pressure-expansion so that it strongly applies the profile against internal surfaces of closed form and counter-form one against the other.
  • said part filling in elastic material is in two parts distinct, touching end to end once introduced in the profile, each part of said piece of filling with a channel opening to a single end and being blind at the opposite end, the end where the channel opens out being linked to a metal insert of jaw tightening and hydraulic pressure supply and equipped with a means of connection to means hydraulic pressurizing, said metal insert penetrating into the corresponding end of the profile.
  • said means to subject the filling part to pressure-expansion includes a compression piston machined to the profile inside of the profile and subjected to a thrust F by a means any.
  • Figure 1 is a schematic front view showing a stretch bending machine with the equipment according to the invention.
  • Figure 2 is a top view of Figure 1.
  • Figure 3 is a top view of Figure 1 but in the position where, unlike Figure 2, the bending is carried out and the counter-form being applied against form.
  • Figure 4 is an enlarged partial view showing the profile bent against the form with the counter-form in closed position against form.
  • Figure 5 is the same as Figure 3 but with the filling part in its compressed-expanded state by the using hydraulic fluid.
  • Figure 6 shows an enlarged partial view, in cutting, one end of the equipment, in the case of forming of a closed section profile.
  • Figure 7 is a section along VII-VII of the figure 6.
  • Figure 8 is similar to Figure 6 but in the case of forming an open section profile.
  • Figure 9 is a section along XI-XI of Figure 8.
  • Figure 10 is similar to Figure 6 but in the case where the compression-expansion means of the part filling is carried out by a piston.
  • the machine has conventionally a frame 1 comprising a tool table 1 on which we just fix a shape 3 of convex profile corresponding to the bending to be obtained, two clamping jaws 4, 5 of the profile 6 to be bent, linked to stretching cylinders 7, 8 allowing to exert a traction force on the profile 6 during its winding around the form 3, the jacks 7, 8 being themselves linked to two arms 9, 10 pivoting around axes 11, 12 connected to jacks 13, 14 and ensuring winding the profile 6 against the convex shape 3.
  • the machine comprises a equipment for performing an operation hydroforming on the same machine and this simultaneously or not with a drawing operation by the drawing jacks 7, 8, so as to combine the expansion constraints and of elongation in the material of the profile to be formed.
  • This equipment first includes a counter-form 15 with jacks 16, 17 to apply this counterform 15 against form 3 when the profile is bent against shape, as shown in FIG. 3.
  • Keys 18, 19 (FIGS. 6 and 7) make it possible to lock the counterform 15 on form 3 as shown in FIG. 7, the form and the counterform are machined to the profile of the profile 6.
  • form and counter-form to constitute, when are in the closed position (figure 3, 4, 5, 7) a channel following the external contours of the final piece to obtain, increased, lengthwise, minimum length required for cutting and the tightness of the ends, and corrected to take account different elastic returns of the material of which the profile to be formed when it returns from its shape under constraints to the desired final shape without constraints external.
  • the form and the counter-form can each be do it in one or more parts.
  • Form 3 bending can in particular have a contour not only convex but have one or more inflection points.
  • the equipment also includes a filling part 20 of elastic material, visible in FIGS. 4, 5, 6, 7 and made up of two parts 20 A, 20 B in this form of realization corresponding to these figures.
  • This filling part 20, in two parts 20 A and 20 B, is introduced into the profile before bending and provides, during bending, support for the parts of the profile not in contact with the shape 3.
  • the equipment includes means for compressing and expanding the workpiece filling 20.
  • each part 20 A (20 B) of the filling part 20 is hollowed out with a blind channel 21 at one end and opening at the other.
  • it is equipped with means 23 for connection to a circuit hydraulics including 24 regulation and a pump hydraulic 25 ( Figures 2 and 3).
  • a counterform 15 with a recess 26 we have shown a counterform 15 with a recess 26.
  • hydraulic pressure P is sent, ensuring expansion of the filling part 20 and the plating of the profile 6 against the surfaces of the channel formed by form 3 and the platform 15 closed against each other.
  • This recess 26 making it possible to carry out in the profile 6 local deformation by pressure-expansion of the filling part 20 made of material elastic can also be performed in form 3.
  • the recess may be such that said pressure-expansion causes shearing of holes or of the entire circumference of the profile, for example for detach the ends held by the jaws, from the part central component of the finished part.
  • Figure 7 is a section along VII-VII of the figure 6 but before the pressurization of the part 20 by the channel 21 while in FIG. 6 the filling part 20 is shown in expanded condition and the profile 6 plated against the walls of the canal.
  • the profile 6 to be bent and form is of closed section as can be seen in Figure 7.
  • An advantage of using the coin filling 20 for securing the profile 6 against the walls of its channel-shaped housing consists of that the profile does not need to be cleaned after its installation in shape since it is not in contact with the hydroforming liquid, the two parts 20 A and 20 B of the piece of filling being waterproof.
  • Figure 6 shows that one can perform in the profile 6 of concave deformations by means of punches such as 27, the elastic filling piece 20 playing then the role of stamping cushion.
  • the pressurization of channel 21 can be carried out at will before, simultaneously or successively with a drawing operation by the jaws 4.5 by means of the jacks 6.7.
  • Figures 8 and 9, respectively equivalent to Figures 6 and 7 show the case of bending and forming of a section 6 with open section.
  • Figure 10 shows a variant in which the pressure-expansion of the filling part 20 is performed, not by hydraulic pressure, but by the by means of a compression piston 28 machined to the profile inside of the profile.
  • This piston rests directly against the elastic filling part 20 and it has a tail 29 passing through a metal insert 30 used for clamping of the jaws 5.
  • the compression-expansion is ensured by the means of a thrust force F exerted on the piston 28 by any known means.
  • This variant can in particular be used when the profile 1 to be formed is short in length.
  • the elastic filling part 20 is in one only part.
  • the effort F can be carried out only by a single end, in which case the other end is closed by a metal insert for clamping the jaws 4, solid, without piston tail hole, filler piece leaning directly against this insert.
  • the elastic filling part 20 is for example an elastomer such as polyurethane.
  • the hydraulic pressure sent can be understood between a few dozen bars and a few thousand bars.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP97401964A 1996-08-30 1997-08-21 Vorrichtung zum Formen von Metallprofilen Expired - Lifetime EP0826440B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9610620A FR2752756B1 (fr) 1996-08-30 1996-08-30 Equipement pour le formage de profiles metalliques
FR9610620 1996-08-30

Publications (2)

Publication Number Publication Date
EP0826440A1 true EP0826440A1 (de) 1998-03-04
EP0826440B1 EP0826440B1 (de) 2003-07-02

Family

ID=9495318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97401964A Expired - Lifetime EP0826440B1 (de) 1996-08-30 1997-08-21 Vorrichtung zum Formen von Metallprofilen

Country Status (8)

Country Link
US (1) US5771730A (de)
EP (1) EP0826440B1 (de)
JP (1) JPH1085844A (de)
KR (1) KR19980019153A (de)
CA (1) CA2213687A1 (de)
DE (1) DE69723172T2 (de)
ES (1) ES2202563T3 (de)
FR (1) FR2752756B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0856367A2 (de) * 1997-01-31 1998-08-05 Aluminum Company Of America Stretchformung von Metalkörper mit internen polymerischen Dornen
CN104307948A (zh) * 2014-09-26 2015-01-28 北京北方车辆集团有限公司 矩形空心型钢拉弯成型方法及其专用卡紧装置

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2350312A (en) * 1999-05-08 2000-11-29 Rover Group Die forming
DE10329719A1 (de) * 2003-07-02 2005-01-20 Daimlerchrysler Ag Rohrbogen
US7069761B2 (en) * 2004-05-05 2006-07-04 The Boeing Company Gripping apparatus and method
DE102005013689B3 (de) * 2005-03-21 2006-01-05 Forschungsgesellschaft Umformtechnik Mbh Vorrichtung und Verfahren zum Trennen oder Lochen eines nach dem Innenhochdruckumformverfahren hergestellten Werkstücks
US7340933B2 (en) * 2006-02-16 2008-03-11 Rohr, Inc. Stretch forming method for a sheet metal skin segment having compound curvatures
WO2009078158A1 (ja) * 2007-12-18 2009-06-25 K & I Inc. パイプの成形方法
DE102011101231A1 (de) * 2010-06-15 2011-12-15 Kiefel Gmbh Verfahren und Vorrichtung zum Recken und Formen eines Folienzuschnitts und hiermit hergestelltes Produkt
KR101298018B1 (ko) * 2012-12-06 2013-08-26 김환조 서보 모터와 감속기가 구비된 성형기
KR101465997B1 (ko) * 2012-12-13 2014-11-27 주식회사 성우하이텍 벤딩 프레스용 클램핑 장치
TWI528725B (zh) 2013-05-06 2016-04-01 國立中山大學 寬頻頻率合成器及其頻率合成方法
CN104525646A (zh) * 2014-11-26 2015-04-22 安徽科瑞科技发展有限公司 拉弯装置和拉弯机
CN105598227B (zh) * 2016-03-29 2018-06-12 王志中 一种一体式拉弯机
KR101972063B1 (ko) * 2017-09-29 2019-04-24 동의대학교 산학협력단 벤딩기 및 벤딩공법
DE102017218420A1 (de) * 2017-10-16 2019-04-18 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Herstellen eines Bauteils
US11318520B2 (en) * 2018-12-30 2022-05-03 John Ralph Stewart, III Stretch forming method for a sheet metal skin with convex and concave curvatures
CN110385358B (zh) * 2019-07-25 2024-05-14 凌云工业股份有限公司汽车零部件研发分公司 一种汽车用s型铝合金型材保险杠的成型模具
CN111872184B (zh) * 2020-08-07 2024-09-24 大连交通大学 一种基于高频复合振动的辅助拉弯装置及方法
CN112474933B (zh) * 2021-01-06 2024-09-10 长春工业大学 一种基于多自由度模具结构的三维热拉弯成形装置
CN112756494A (zh) * 2021-01-29 2021-05-07 镇江远海包装有限公司 一种用于吨桶底板加工的自动冲压流水线
CN114247787A (zh) * 2021-12-17 2022-03-29 中航贵州飞机有限责任公司 一种槽形件数控拉弯用型面保持的加工方法
CN114850304B (zh) * 2022-04-28 2022-12-16 北京航空航天大学 一种航空变截面曲率构件的组合成形方法
DE102022114972B4 (de) * 2022-06-14 2024-07-25 Uniflex - Hydraulik GmbH Verfahren zur mehrachsigen Umformung eines hohlen Werkstücks

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0414545A2 (de) * 1989-08-24 1991-02-27 Graph-Tech, Inc. Vorrichtung und Verfahren zum Formen eines rohrförmigen Rahmens
EP0588528A1 (de) * 1992-09-15 1994-03-23 Aquaform Inc Vorrichtung und Verfahren zum Formen und hydraulischen Lochen eines rohrförmigen Rahmens
DE9412978U1 (de) * 1994-07-23 1994-10-27 Huber & Bauer GmbH, 66763 Dillingen Vorrichtung zum Biegen von Rohren
US5396786A (en) * 1993-03-15 1995-03-14 Mueller Industries, Inc. Machine and method for manufacturing crossover fittings

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2739634A (en) * 1950-09-02 1956-03-27 Richard Seifried Stretch-forming machine
US3396565A (en) * 1965-09-30 1968-08-13 L C Miller Co Apparatus for bending metal tubing
US4704886A (en) * 1985-04-22 1987-11-10 Aluminum Company Of America Stretch-forming process
US4815308A (en) * 1987-01-20 1989-03-28 The Cyril Bath Company Method and apparatus for forming an elongate member into a predetermined shape
US4803878A (en) * 1987-01-20 1989-02-14 The Cyril Bath Company Method and apparatus for forming elongate tubular members into a predetermined shape while extrusion is gas pressurized and product
US4827753A (en) * 1987-01-20 1989-05-09 The Cyril Bath Company Extrusion former with three-way powered movement
JPH0647453A (ja) * 1992-06-19 1994-02-22 Ishikawajima Harima Heavy Ind Co Ltd 管材の曲げ加工装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0414545A2 (de) * 1989-08-24 1991-02-27 Graph-Tech, Inc. Vorrichtung und Verfahren zum Formen eines rohrförmigen Rahmens
EP0588528A1 (de) * 1992-09-15 1994-03-23 Aquaform Inc Vorrichtung und Verfahren zum Formen und hydraulischen Lochen eines rohrförmigen Rahmens
US5396786A (en) * 1993-03-15 1995-03-14 Mueller Industries, Inc. Machine and method for manufacturing crossover fittings
DE9412978U1 (de) * 1994-07-23 1994-10-27 Huber & Bauer GmbH, 66763 Dillingen Vorrichtung zum Biegen von Rohren

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0856367A2 (de) * 1997-01-31 1998-08-05 Aluminum Company Of America Stretchformung von Metalkörper mit internen polymerischen Dornen
EP0856367A3 (de) * 1997-01-31 2001-01-31 Aluminum Company Of America Stretchformung von Metalkörper mit internen polymerischen Dornen
CN104307948A (zh) * 2014-09-26 2015-01-28 北京北方车辆集团有限公司 矩形空心型钢拉弯成型方法及其专用卡紧装置

Also Published As

Publication number Publication date
JPH1085844A (ja) 1998-04-07
FR2752756A1 (fr) 1998-03-06
ES2202563T3 (es) 2004-04-01
DE69723172T2 (de) 2004-04-15
EP0826440B1 (de) 2003-07-02
DE69723172D1 (de) 2003-08-07
CA2213687A1 (fr) 1998-02-28
FR2752756B1 (fr) 1998-10-09
US5771730A (en) 1998-06-30
KR19980019153A (ko) 1998-06-05

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