EP0350671B1 - Einrichtung zum Biegeumformen oder Richten von Werkstücken durch plastische Formänderung - Google Patents

Einrichtung zum Biegeumformen oder Richten von Werkstücken durch plastische Formänderung Download PDF

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Publication number
EP0350671B1
EP0350671B1 EP89111254A EP89111254A EP0350671B1 EP 0350671 B1 EP0350671 B1 EP 0350671B1 EP 89111254 A EP89111254 A EP 89111254A EP 89111254 A EP89111254 A EP 89111254A EP 0350671 B1 EP0350671 B1 EP 0350671B1
Authority
EP
European Patent Office
Prior art keywords
elements
force
pressing
distributing
workpiece
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
EP89111254A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0350671A2 (de
EP0350671A3 (en
Inventor
Helmut Ing. Grad. Reccius
Rolf Dr.Rer.Nat. Meyer
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.)
Dornier GmbH
Original Assignee
Dornier 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 Dornier GmbH filed Critical Dornier GmbH
Publication of EP0350671A2 publication Critical patent/EP0350671A2/de
Publication of EP0350671A3 publication Critical patent/EP0350671A3/de
Application granted granted Critical
Publication of EP0350671B1 publication Critical patent/EP0350671B1/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
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/04—Movable or exchangeable mountings for tools
    • B21D37/06—Pivotally-arranged tools, e.g. disengageable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/45—Scale remover or preventor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/47—Burnishing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/47—Burnishing
    • Y10T29/471—Burnishing of water laid fibrous article [e.g., paper]
    • Y10T29/473—Heated burnishing member
    • Y10T29/474—Burnishing tool reciprocates across work surface

Definitions

  • the invention relates to a device for bending, straightening or the like of workpieces, according to the features of the preamble of claim 1.
  • a device for bending, straightening or the like of workpieces according to the features of the preamble of claim 1.
  • Such a device is e.g. known from EP-A-0 260 361.
  • shot peen forming is used in addition to other known forming processes.
  • This reshaping method is preferably used in the reshaping of planking parts as components of aircraft fuselages and aircraft wings or in the cell construction of spacecraft.
  • impact bodies in the form of steel balls or impact bodies made of other materials or of another shape are used.
  • the shaping of, for example, plate-shaped workpieces, in particular panels designed as integral components with stiffening ribs arranged on one side the impact bodies are moved against the workpiece surface so that the impact bodies penetrate into the surface of the workpiece.
  • the impact on the workpiece to be reshaped can occur in free fall of the impact body from a predetermined height depending on the impact body dimension, in a flat impact distribution or in a distribution of the body in the form of an impact front.
  • the impact bodies are acted upon by suitable media and thereby accelerated. Air or liquid is used as the application medium or the impact bodies are accelerated with centrifugal wheels.
  • devices are known by means of which the impact bodies are individually accelerated in guides in order to be able to maintain a predetermined, defined impact area.
  • a device for shaping sheet metal parts which rigidly accommodates a number of indenters on a holder and is aligned in an impression plane.
  • rod members acting on one another and on the workpiece with an orientation transverse to the strips are provided under pressure.
  • the rod members are fixed vertically adjustable by roller sets transversely to their longitudinal direction and are rotatably supported at their ends on frame parts. Furthermore, a number of rods are connected to a drive system. A free, automatic adjustment of the rod members to the workpiece shape and even pressure distribution for loading the workpiece is not provided.
  • the object of the present invention is for the shaping or straightening of workpieces, for example panels, stiffening ribs or the like, an even distribution of the shaping force simultaneously over several press-in elements or a press-in unit in conjunction with an adaptation to the given contour of the workpiece or in the To cause a changing contour in the course of a forming cycle.
  • the predetermined lateral spacing of the indenting elements allows indentable indentation patterns on the workpiece in a predetermined indentation depth and in predetermined areas and Achieve locations of the workpiece. This enables a precisely predeterminable forming and the degree of forming can be reproduced in series production. Due to the automatic adaptation of the indentation elements to the contour of the workpiece, for example also to the changing contour of the workpiece during the forming process due to the progressive penetration of the indentation elements into the workpiece, the introduced indentation force is evenly distributed to all indentation elements. The adaptation of the press-in elements to predetermined or changing contour profiles is achieved by the lateral support of the press-in elements and / or force distribution elements in connection with the play between the press-in elements and the distributor elements, and the support element.
  • the guiding of the indentation elements on a support means that the indentation force is effective perpendicularly or approximately perpendicularly to the workpiece surface and thus uncontrollable indentation movements with the resulting irregular and uneven material displacement on the workpiece due to an unpredictable application of force at an angle to the vertical to the workpiece surface, as with State of the art to be avoided.
  • a significant advantage of the design according to the invention over the known also lies in the fact that the indentation speed with which the indentation elements penetrate into the material can be controlled over the period of the indentation process. Advantages according to the invention also result from the fact that commercially available steel balls, steel cylinder bodies or those with barrel-shaped, convex design, such as used in roller bearings, can be used as indentation elements. It is only the one that receives the indentation elements and to produce the push-in force on the support element transmitting the elements.
  • a press-in unit consisting of the support and the press-in and force distribution elements accommodated by it allows the press-in elements to be adapted to a flat initial shape of the workpiece prior to the forming process, and also to be adapted to a concave, convex or spherical-shaped contour of the workpiece.
  • the adjustment also takes place in accordance with the contour profile that changes during the forming process.
  • the device designed according to the invention allows component length to be extended by means of indenting elements penetrating into the workpiece with the same dimensioning of the indenting elements and the same indentation depth without the formation of a curve.
  • component curvature can be achieved with simultaneous component lengthening.
  • an indentation unit can have one or more layers of force distribution elements.
  • the push-in elements and force distribution elements can be fixed to the support on the support of cages in the manner of ball bearings or roller bearings while leaving all-round play.
  • the press-in elements can be given an active component which differs from the direction of action applied to the forming unit via the force distribution elements, so that the direction of penetration of the press-in elements into the workpiece surface is perpendicular or inclined to the longitudinal extension of the workpiece.
  • the device as a unit is denoted overall by 1.
  • the device can be received and acted upon by a force generator, not shown here, e.g. B. similar to a pneumatic hammer or the like.
  • the unit 1 consists of a receiving element 6, the press-in elements 3 and the force distribution elements 4 which are in contact with these and the support element 4.
  • the workpiece to be formed is also designated by 2.
  • the force distribution elements 4 are supported in the effective direction of the indentation force F, that is, the force directed perpendicularly or approximately perpendicularly to the acting surface 2 'of the material on support wall surface sections 8 of the support element 6, which here is a plane surface extending transversely to the direction of the indentation force F.
  • the support element 6 also has a support wall surface section 7, on which the indentation element 3 adjacent to the wall surface or the force distribution elements 4 are supported transversely to the direction of action of the indentation force F.
  • the support element 6, delimited by the support wall surface section 7 and the support wall surface section 8, has an open space for receiving the elements 3 and 4 against the workpiece 2 or its application surface 2 ', the space being dimensioned such that between the balls 3 adjacent to one another and the balls 4 are left with a play s.
  • the force distribution elements 4 are not supported laterally on the support wall surface sections 8.
  • the balls of each layer L are prevented from falling out of the supporting element 6 by suitable means, for example guide cages 12 while leaving the play s.
  • the pressing elements 3 penetrate into the acting surface 2 'of the workpiece 2 and displace material in a known manner depending on the contour and dimension of the pressing elements 3, and depending on the depth of penetration in accordance with the height of the applied Impression force F.
  • the indentation elements 3 and the distributor elements 4 automatically adjust themselves to the contour of the workpiece surface 2 '.
  • FIGS. 2 and 3 show the automatic adaptation of the position of the elements 3 and 4 to a convex or concave curvature of the action surface 2 'of the workpiece 2. This is made possible by the movement s between the elements 3 and the elements 4, one element layer L E or L K each, and also by the free mobility of the push-in elements 3 (L E ) and 4 (L K ) relative to the support element 6 in the effective direction of the Impression force F and across this direction of action.
  • the lateral support of the indentation elements 3 on the lateral support wall surface section 7 enables the elements 3 to be fixed laterally.
  • Lubrication can be provided to reduce the friction between the elements 3 and 4 which are adjacent and in contact with one another and the support wall surfaces 8 and 7.
  • the workpiece contour shown in FIGS. 1, 2 and 3 can represent the initial shape of the workpiece before the forming or the contour of the workpiece in a forming state during a forming process. In both cases, even with a bowl-shaped curvature of the workpiece, the indentation elements 3 and force distribution elements 4 can automatically adapt to the given contour.
  • the support wall surface section 8 for the distributor elements 4 is designed to be inclined or curved in order to act upon the indentation elements 3 via the force distributor elements 4 with an active direction component which is inclined by an angle ⁇ relative to the perpendicular to the workpiece surface 2 ', so that a direction of the impression force (F ') perpendicular to or approximately perpendicular to the surface 2' is achieved even with a curved contour of the workpiece.
  • the indentation elements 3 and the force distribution elements 4 can have different dimensions and shape from one another, as indicated by way of example in FIG. 14. So the elements of a layer L E / L K of elements 3 respectively. 4 different dimensions. This allows a specific indentation pattern with different material displacement to be generated when a specific indentation force is applied and thus a specific degree of deformation of the workpiece.
  • the formation according to FIGS. 11 and 12 result in indentation patterns on the workpiece with an elongated character and corresponding material displacement.
  • the material displacement on the workpiece 2 resulting from such a pressing-in shape of the pressing-in elements 3 leads to a bending deformation about a bending axis.
  • variations in the bending deformation around several bending axes with a preferred bending axis can be achieved.
  • a holding element 12 with openings 22 for fixing the elements 3 and 4 to the support element 6 is attached.
  • the openings have dimensions that allow the free mobility of the elements 3 and 4 at least in the order of magnitude of the play s.
  • the elements 3 and 4 on the support element 6 for fixing are surrounded by an elastically deformable mass 14 which fills the interior of the element 6.
  • the mass 14 can have different flexibility in predetermined areas.
  • the counter bracket 20 can be formed from an elastically deformable material. With corresponding elasticity, a reversal of the curvature profile on the workpiece 2 occurs when the workpiece is acted upon by the pressing-in elements 8 on the workpiece side opposite the counter-holder.
  • FIG. 9 shows the possibility of adapting the elements 3 and 4 also on the application surfaces 2 'of a complicated course.
  • FIG. 10 provides that the force distribution elements on the support surfaces 7 of the support element 6 or transversely to the effective direction of the indentation force F. Support F '.
  • FIGS. 11 and 12 respectively show cylindrically shaped indenting elements 3 which are in contact with one another. Force distribution elements 4, cast into an elastically deformable mass 14, respectively.
  • FIG. 12 the combination of indentation elements 3 or Kraftverteielrieri 4 different shape. With this combination of shapes, certain indentation patterns can be set with the corresponding workpiece displacement.
  • forming device directed against each other from both sides of a web 23 to be formed, enables an elongation or Spread of the web in a predetermined manner, for example for straightening this workpiece section 23, or when using indenting elements 3 of different dimensions on the opposite sides of the workpiece 2.
  • Devices with differently dimensioned push-in elements 3 can also be worked on the different sides.
  • the support element is divided into separate and mutually movable partial support elements.
  • the force distribution elements 4 have a smaller diameter than the indentation elements 3.
  • the mobility of the sub-elements 6 ' is limited to a limited relative movement by means not shown here.
  • FIGS. 15 and 16 the course of the support wall sections 7 can be seen.
  • a force distribution element 4 is in contact with four indentation elements 3 and the force is distributed over all four elements 3 in the same size. The same also applies to the embodiment according to FIG. 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Jigs For Machine Tools (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Wire Processing (AREA)
EP89111254A 1988-07-13 1989-06-21 Einrichtung zum Biegeumformen oder Richten von Werkstücken durch plastische Formänderung Expired - Lifetime EP0350671B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3823675 1988-07-13
DE3823675A DE3823675A1 (de) 1988-07-13 1988-07-13 Einrichtung zum biegeumformen oder richten von werkstuecken durch plastische formaenderung

Publications (3)

Publication Number Publication Date
EP0350671A2 EP0350671A2 (de) 1990-01-17
EP0350671A3 EP0350671A3 (en) 1990-10-10
EP0350671B1 true EP0350671B1 (de) 1993-11-24

Family

ID=6358552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89111254A Expired - Lifetime EP0350671B1 (de) 1988-07-13 1989-06-21 Einrichtung zum Biegeumformen oder Richten von Werkstücken durch plastische Formänderung

Country Status (6)

Country Link
US (1) US4974434A (es)
EP (1) EP0350671B1 (es)
JP (1) JPH02127923A (es)
CA (1) CA1329498C (es)
DE (1) DE3823675A1 (es)
ES (1) ES2048790T3 (es)

Families Citing this family (33)

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US5293320A (en) * 1992-03-13 1994-03-08 General Electric Company Measurment of shot peening coverage by impact dent characterization
FR2698576B1 (fr) * 1992-11-30 1995-02-17 Framatome Sa Procédé et dispositif de réparation d'une zone défectueuse de la paroi d'une pièce métallique et en particulier d'une pièce tubulaire.
US5307661A (en) * 1993-04-27 1994-05-03 Westinghouse Electric Corp. System and method for shot peening reactor vessel penetrations
US6032320A (en) * 1995-01-23 2000-03-07 Marshalltown Trowel Company Trowel having imposed blade stresses and method of manufacture
US5697265A (en) * 1995-01-23 1997-12-16 Mccomber; Larry J. Trowel having imposed blade stresses and method of manufacture
US5655396A (en) * 1995-09-25 1997-08-12 General Motors Corporation Roll peening device
US5771729A (en) * 1997-06-30 1998-06-30 General Electric Company Precision deep peening with mechanical indicator
DE29716272U1 (de) * 1997-09-10 1999-01-21 Eckold Gmbh & Co Kg, 37444 St Andreasberg Vorrichtung zur spanlosen Umformung von Blechen und Profilen
FR2791293B1 (fr) * 1999-03-23 2001-05-18 Sonats Soc Des Nouvelles Appli Dispositifs de traitement de surface par impacts
DE10037029A1 (de) * 2000-07-27 2002-02-28 Kugelstrahlzentrum Aachen Gmbh Verfahren und Vorrichtung zum Umformen von Strukturbauteilen
WO2002094470A1 (de) 2001-05-21 2002-11-28 Trumpf Pulzer Gmbh + Co. Kg Vorrichtung zum biegen von in umfangsrichtung geschlossenen hohlprofilen
DE10133314A1 (de) * 2001-07-12 2003-01-23 Ecoroll Ag Verfahren und Werkzeug zum Walzen eines Werkstücks und Anordnung aus einem Walzwerkzeug und einem Werkstück
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US7185521B2 (en) * 2005-05-13 2007-03-06 General Electric Company Method and apparatus for process control of burnishing
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US20080081208A1 (en) * 2006-09-29 2008-04-03 Prevey Paul S Method and apparatus for improving the distribution of compressive stress
US8079120B2 (en) * 2006-12-30 2011-12-20 General Electric Company Method for determining initial burnishing parameters
US8051565B2 (en) * 2006-12-30 2011-11-08 General Electric Company Method for increasing fatigue notch capability of airfoils
US20090094829A1 (en) * 2007-10-15 2009-04-16 United Technologies Corporation Method for ultrasonic peening of gas turbine engine components without engine disassembly
US8393368B2 (en) * 2009-06-01 2013-03-12 Lockheed Martin Corporation Numerically controlled composite compaction device
DE102010044171A1 (de) * 2010-11-19 2012-05-24 Aktiebolaget Skf Vorrichtung und Verfahren zur Behandlung eines keramischen Werkstücks
CN102114505A (zh) * 2010-12-15 2011-07-06 重庆研镁科技有限公司 一种挤压型材在线连续矫直装置
US10576523B1 (en) * 2013-09-19 2020-03-03 The Boeing Company Method and apparatus for impacting metal parts
JP6484521B2 (ja) * 2015-07-17 2019-03-13 株式会社神戸製鋼所 平面度矯正装置
US9902482B2 (en) * 2015-10-28 2018-02-27 The Boeing Company Deep rolling forming
US10493594B2 (en) 2016-04-12 2019-12-03 General Electric Company Apparatus and method for peening of machine components
JP7182847B2 (ja) * 2016-09-29 2022-12-05 三菱重工業株式会社 成形方法および成形装置
US10914384B2 (en) * 2018-05-03 2021-02-09 Solar Turbines Incorporated Method for refurbishing an assembly of a machine
CN115090750B (zh) * 2022-07-14 2024-01-26 中国航空制造技术研究院 高筋不连续壁板喷丸成形预弯工装及使用其的成形方法
CN115090751B (zh) * 2022-07-14 2024-04-05 中国航空制造技术研究院 一种提高带筋整体壁板喷丸成形极限的方法

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Also Published As

Publication number Publication date
EP0350671A2 (de) 1990-01-17
EP0350671A3 (en) 1990-10-10
US4974434A (en) 1990-12-04
JPH02127923A (ja) 1990-05-16
CA1329498C (en) 1994-05-17
DE3823675A1 (de) 1990-01-18
ES2048790T3 (es) 1994-04-01
DE3823675C2 (es) 1992-12-24

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