EP1986801B1 - PROCEDE ET DISPOSITIF DE Formation D'UNE DECOUPE OU D'UNE PERFORATION DANS LA PAROI D'UN COMPOSANT FORME PAR UN PROCEDE DE FACONNAGE SOUS HAUTE PRESSION INTERIEURE - Google Patents

PROCEDE ET DISPOSITIF DE Formation D'UNE DECOUPE OU D'UNE PERFORATION DANS LA PAROI D'UN COMPOSANT FORME PAR UN PROCEDE DE FACONNAGE SOUS HAUTE PRESSION INTERIEURE Download PDF

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Publication number
EP1986801B1
EP1986801B1 EP07702923A EP07702923A EP1986801B1 EP 1986801 B1 EP1986801 B1 EP 1986801B1 EP 07702923 A EP07702923 A EP 07702923A EP 07702923 A EP07702923 A EP 07702923A EP 1986801 B1 EP1986801 B1 EP 1986801B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
punch
wall
forming
die
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
EP07702923A
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German (de)
English (en)
Other versions
EP1986801A1 (fr
Inventor
Bernd Wilhelm
Clemens Haller
Manfred Helm
Isaak Abramov
August Wilhelm Schäfer
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.)
Sitech Sitztechnik GmbH
Original Assignee
Sitech Sitztechnik GmbH
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Publication date
Application filed by Sitech Sitztechnik GmbH filed Critical Sitech Sitztechnik GmbH
Publication of EP1986801A1 publication Critical patent/EP1986801A1/fr
Application granted granted Critical
Publication of EP1986801B1 publication Critical patent/EP1986801B1/fr
Not-in-force 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies
    • 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
    • B21D26/035—Deforming tubular bodies including an additional treatment performed by fluid pressure, e.g. perforating

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 7 for producing a cutout or breakthrough in the wall of a formed by the hydroforming process component, such as hollow body, which is still in the forming tool with subsequent fine machining of the surface.
  • a device or method is known from DE 103 28 452 B1 known.
  • hydroforming known which allow the cutting out of cutouts from component walls from the outside inwards, as shown in the DE 43 22 063 C2 is described.
  • This known method is carried out with the aid of an externally acting on the outer surface of the tool punch such that the cut is first precut at maximum internal pressure to a residual wall thickness and then cut at a reduced internal pressure.
  • breakthroughs or cutouts can also be carried out from the inside out ( DE 1 552 122 A1 ), in that the wall is broken or cut out by increasing the internal pressure into a tool recess, it being possible for an outwardly displaceable support punch to be provided in the tool recess.
  • the invention is therefore based on the object to provide a method and an apparatus of the aforementioned type, which avoids the difficulties outlined above and in which the measures described above or the like unnecessary.
  • the stated object is achieved in a method of the type mentioned in that initially the wall of the stored in the forming tool and fixed by sealing stamp and positioned starting workpiece is suddenly precut with the aid of a punch puncture to a residual wall thickness. This is the abrupt. Effect of the punch realized by a distance between the upper part of the punch and Hydrozylindem. This distance serves to avoid the acceleration section of the hydraulic cylinder.
  • the punch moves to the outer surface of the tool ges back.
  • the sealing dies push the starting piece into a new position to compensate for a change in shape of the starting workpiece, ie elongation in the hydroforming, and to accurately position the precut area, ie the predetermined breaking point relative to the punch.
  • the internal pressure increases, and during the forming process
  • the cutting process of the cutouts from the component is carried out according to known methods described above, from outside to inside and / or from inside to outside.
  • the pre-cut part of the wall of the component ie the predetermined breaking point previously generated by the embossing edge of the punch, easily and cleanly separated by sudden urid / or multiple movements of the punch between the lower and upper dead centers.
  • a complete substructure is carried out by the above-described non-cutting shaping in order to prevent inclination, edge and ridge formation of the cut and to bring in a certain shape contour having breakthroughs or cutouts.
  • This operation is realized by means of axial movements of the workpiece by means of the sealing ram and vertical movements of the punch, which has a corresponding engraving in its front and / or side surface.
  • a fine machining of the surface of the component is performed.
  • This fine machining of the surface of the component is realized during the removal process from the tool by cold drawing of the workpiece by a drawing ring mounted in the tool by means of simultaneous axial displacement and rotation of the workpiece by the sealing punch.
  • the combined internal high pressure and non-cutting shaping method according to the invention makes it possible to perform any breakthroughs and cutouts on the workpiece and a fine machining of the surface of the component with high accuracy in a single combined forming, punching, bending, Einsenk-, Ziehräumwerkmaschine.
  • this method can be carried out by appropriate joint control of the internal high pressure, the feed, dead play and the speed of the punch, the Nachschiebung and axial position of the output piece and the axial feed, the shift and rotation of the workpiece practically in one operation.
  • Fig. 1 shows a longitudinal section of an apparatus for performing the method
  • Fig. 2 shows a cross section of such a device in a starting position at the beginning of the process.
  • the device or the tool has a tool 1, in which the workpiece 2, in particular a holding tube for a headrest of vehicle seats is inserted.
  • the workpiece 2 is acted upon by sealing stamps 3, 4 end.
  • Via an opening 5 the fluid for performing the hydroforming can be introduced into the hollow workpiece 2.
  • the openings or cutouts in the wall of the workpiece 2 are introduced by means of punch punches 8, 10, act on the hydraulic cylinder 6, 7.
  • the punches are held by yokes 9, 11 with bearing areas 12, 14, which are adjustable in height adjustable.
  • a die 17 or a drawing ring is arranged on the side of the tool on which the workpiece is introduced or removed. Furthermore, one or two part-circular grooves 22 are introduced into the punches 8, 10, which serve to edge straightening of the introduced apertures or cutouts.
  • Fig. 3 . 6 . 11 . 14 and 19 show the different stages of work.
  • the workpiece 2 positioned by the sealing rams 3 is pre-cut by the punches 8, 10 in an impact-like or jerky manner.
  • the punch 10 which then causes a complete cutout, the yoke 11 is further extended, so that there is a smaller distance ⁇ 1 .
  • a shock is stopped by hitting a vertical plate on the abutment 13, as in Fig. 3 is clarified.
  • the 4 and 5 show enlargements. The impact introduces a pre-damage into the material.
  • the active fluid is pumped into the interior of the workpiece 2, after the punches 8, 10 have been withdrawn to the outer surface of the tool. Since it comes to an expansion of the material during the actual hydroforming, the workpiece 2 is previously brought by axial displacement of the sealing dies 3, 4 in a position which positions exactly the predetermined breaking point to the respective punch ( Fig. 6 ).
  • the Fig. 7-10 illustrate the subsequent cutting process under the influence of the internal high pressure. There is the possibility that the displaceable punch from the outside to the inside ( Fig. 8, 9 ) or from inside to outside ( Fig. 7, 10th ). In hydroforming, the wall of the workpiece 2 abuts against the inside 24, 25 of the tool. Cutting edges 26, 27 are formed on the cutouts or averages.
  • a subsequent process step which serves the edge aftertreatment or to introduce breakthroughs or cutouts with a certain shape contour.
  • the punch 8, 10 with the cut sheet 28 or formed sheet metal portion 31 is further guided in the direction of travel in the tool, so that the edge portions 29, 30 of the cutouts or openings are aligned with the engraved groove 22 in the punch head.
  • the sealing rams 3, 4 are moved axially and in this way the possibly deformed by the cutting process edges straightened by the forced movement into the grooves 22.
  • Such a reciprocation and the effects of straightening the edge portions (29, 30, 32) are from the Fig. 14-18 seen.
  • the surface calibration is then followed by a drawing process.
  • the formed workpiece 2 is pulled through the die 17 under preferably simultaneous rotations and, due to the drawing ring, is straightened with regard to its mantle surface 33.
  • the process sequence is finally with the help of Fig. 21-27 shown.
  • the workpiece 2 is received by the sealing dies 3, 4 and positioned by axial movement in the tool.
  • puncture acting punch 8, 10 a pre-damage is introduced into the wall.
  • increasing the internal pressure then follows by sudden and / or multiple movement of the punch the actual cut or average.
  • they are forced by axial movement of the workpiece in an engraved groove 22 in the punch. This is followed by the calibration process with subsequent removal of the workpiece.
  • Fig. 28 shows the velocities of the respective punch, as they result from the individual distances ⁇ 1 ⁇ 2 between the upper part of the punch and the hydraulic cylinders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (13)

  1. Procédé de fabrication d'une découpe ou d'une perforation dans la paroi d'un composant formé par un procédé de façonnage sous haute pression intérieure, par exemple un corps creux, qui se trouve encore dans l'outil de façonnage (1), à l'aide d'un poinçon de perforation (8, 10) déplaçable de l'extérieur vers l'intérieur ou de l'intérieur vers l'extérieur, qui est pressé à l'intérieur de la paroi du corps creux, caractérisé en ce que
    - d'abord la paroi de la pièce ou de l'ébauche montée dans l'outil de façonnage (1) et de préférence fixée et positionnée avec des poinçons d'étanchéité (3, 4) est prédécoupée à l'aide du poinçon de perforation (8, 10) avant le façonnage sous pression intérieure percutant jusqu'à une épaisseur de paroi résiduelle,
    - ensuite la partie prédécoupée de la paroi est séparée et
    - ensuite un formage sans enlèvement de copeaux et/ou un usinage fin du composant ou de parties du composant sont réalisés dans l'outil (1).
  2. Procédé selon la revendication 1, caractérisé en ce que la partie prédécoupée de la paroi, dans le sens d'une zone destinée à la rupture pendant le façonnage à haute pression intérieure du composant est séparée par déplacements percutants ou non percutants et/ou par déplacements multiples d'avant en arrière du poinçon perforateur (8, 10).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les perforations et les découpes sont usinées par formage sans enlèvement de copeaux et/ou en ce que la surface d'enveloppe de la pièce façonnée est étalonnée par une opération d'emboutissage.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'un contour de formage déterminé des perforations ou des découpes est réalisé par formage à froid sans enlèvement de copeaux par coulissements axiaux de la pièce (2) et/ou par des déplacements verticaux du poinçon de perforation (8, 10) sans pression intérieure.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'usinage fin de la surface de la pièce (2) est réalisé par emboutissage à froid de la pièce par un outil au moyen d'un coulissement axial, de préférence par rotation, de la pièce.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le composant est un tube pour fixer des appui-tête en vue d'un blocage sur des sièges de véhicules.
  7. Dispositif pour mettre en oeuvre le procédé selon l'une quelconque des revendications 1 à 6, comprenant un outil de façonnage (1) pour réaliser un façonnage sous haute pression intérieure ainsi qu'au moins un poinçon de perforation (8, 10) pour pratiquer des découpes ou des perforations dans la paroi de la pièce, notamment d'un corps creux, caractérisé en ce que pour l'actionnement percutant du poinçon de perforation (8, 10), on peut ajuster une distance variable entre la partie supérieure du poinçon de perforation et des cylindres hydrauliques perforés (6, 7).
  8. Dispositif selon la revendication 7, caractérisé en ce que le poinçon de perforation (8, 10) est équipé de butées de limitation supérieure et inférieure déplaçables.
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que le poinçon de perforation (8, 10) présente, sur ses surfaces latérales, des évidements (22) dont la partie supérieure correspond au contour de la forme des perforations ou des découpes de la pièce, dans le sens de la surface d'enveloppe de la pièce dans la région autour de la perforation ou de la découpe.
  10. Dispositif selon la revendication 9, caractérisé en ce que les évidements sont en forme de cales.
  11. Dispositif selon l'une quelconque des revendications 7 à 10, caractérisé en ce que l'on incorpore dans l'espace creux intérieur de l'outil une bague décorative (17).
  12. Dispositif selon l'une quelconque des revendications 7 à 11, caractérisé en ce que des poinçons d'étanchéité (3, 4) reçoivent la pièce, lesquels sont disposés coaxialement dans l'espace creux interne de l'outil (1) et par des déplacements synchrones axiaux et/ou une rotation, réalisent un positionnement de la pièce et donc de la zone destinée à la rupture prédécoupée par rapport à l'arête de marquage du poinçon de perforation lors du façonnage sous haute pression intérieure, un coulissement axial de la pièce lors du formage sans enlèvement de copeaux, et/ou un usinage fin de la surface.
  13. Dispositif selon l'une quelconque des revendications 7 à 12, caractérisé en ce que les poinçons d'étanchéité (3, 4) qui sont déplaçables axialement de manière synchrone, reçoivent l'ébauche (2) et la guident dans l'outil (1) et l'en ressortent aussi à nouveau.
EP07702923A 2006-02-15 2007-01-22 PROCEDE ET DISPOSITIF DE Formation D'UNE DECOUPE OU D'UNE PERFORATION DANS LA PAROI D'UN COMPOSANT FORME PAR UN PROCEDE DE FACONNAGE SOUS HAUTE PRESSION INTERIEURE Not-in-force EP1986801B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006007224A DE102006007224A1 (de) 2006-02-15 2006-02-15 Verfahren und Vorrichtung zum Herstellen eines Ausschnittes oder Durchbruchs in der Wandung eines nach dem Innenhochdruck-Umformverfahren ausgebildeten Bauteils
PCT/EP2007/000495 WO2007093269A1 (fr) 2006-02-15 2007-01-22 PROCEDE ET DISPOSITIF DE Formation D'UNE DECOUPE OU D'UNE PERFORATION DANS LA PAROI D'UN COMPOSANT FORME PAR UN PROCEDE DE FACONNAGE SOUS HAUTE PRESSION INTERIEURE

Publications (2)

Publication Number Publication Date
EP1986801A1 EP1986801A1 (fr) 2008-11-05
EP1986801B1 true EP1986801B1 (fr) 2010-05-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07702923A Not-in-force EP1986801B1 (fr) 2006-02-15 2007-01-22 PROCEDE ET DISPOSITIF DE Formation D'UNE DECOUPE OU D'UNE PERFORATION DANS LA PAROI D'UN COMPOSANT FORME PAR UN PROCEDE DE FACONNAGE SOUS HAUTE PRESSION INTERIEURE

Country Status (5)

Country Link
EP (1) EP1986801B1 (fr)
CN (1) CN101454093B (fr)
AT (1) ATE468930T1 (fr)
DE (2) DE102006007224A1 (fr)
WO (1) WO2007093269A1 (fr)

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* Cited by examiner, † Cited by third party
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CN102728701B (zh) * 2011-04-14 2014-10-01 宝山钢铁股份有限公司 液压同步冲孔装置及方法
CN102615165A (zh) * 2012-04-09 2012-08-01 吉林省元隆达工装设备有限公司 一种冲孔机构
DE102013003118B4 (de) * 2013-02-25 2015-03-26 Jenoptik Automatisierungstechnik Gmbh Verfahren zum Entsorgen von einem bei einem Lochungsvorgang eines Hohlprofils enstehenden Butzens
CN104096742B (zh) * 2013-04-15 2016-08-10 宝山钢铁股份有限公司 保持工件壁平整度的液压冲孔方法及装置
CN104511943A (zh) * 2013-09-30 2015-04-15 哈尔滨飞机工业集团有限责任公司 一种基于橡皮囊液压成形的封边框类零件切边方法
CN105583288A (zh) * 2016-01-27 2016-05-18 施密特汽车管件(安徽)有限公司 一种油缸管件的冲孔装置
CN105598249B (zh) * 2016-03-10 2017-09-12 哈尔滨奔马科技有限公司 一种获得高外翻边空心管件的方法及管件
CN105921585A (zh) * 2016-04-29 2016-09-07 保隆(安徽)汽车配件有限公司 一种内高压成型管件冲孔方法
CN107931408A (zh) * 2017-11-30 2018-04-20 苏州紫荆清远新能源汽车技术有限公司 一种内高压成型零件的开孔装置
CN109570317A (zh) * 2018-12-13 2019-04-05 安徽江淮汽车集团股份有限公司 充液成形模具
CN111434408A (zh) * 2019-01-14 2020-07-21 无锡朗贤轻量化科技股份有限公司 一种柔性横梁式螺旋锁紧管件或型材液压成形工艺
CN111496056A (zh) * 2019-01-14 2020-08-07 无锡朗贤轻量化科技股份有限公司 一种柔性横梁式拉杆锁紧管件或型材液压成形工艺
CN111496059A (zh) * 2019-01-14 2020-08-07 无锡朗贤轻量化科技股份有限公司 一种柔性横梁式油缸锁紧管件或型材液压成形工艺
CN112170610B (zh) * 2020-09-15 2021-12-14 安徽江淮汽车集团股份有限公司 一种充液成型模具及充液成型方法
CN112692150A (zh) * 2020-12-11 2021-04-23 星火智慧(杭州)信息科技有限公司 一种分集水器内胀机

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Also Published As

Publication number Publication date
EP1986801A1 (fr) 2008-11-05
CN101454093B (zh) 2012-04-18
DE502007003933D1 (de) 2010-07-08
DE102006007224A1 (de) 2007-08-16
WO2007093269A1 (fr) 2007-08-23
ATE468930T1 (de) 2010-06-15
CN101454093A (zh) 2009-06-10

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