EP0373430B1 - Verfahren zum Umformen von ebenen, plattenförmigen Bauteilen in eine zweiachsig gekrümmte Form - Google Patents

Verfahren zum Umformen von ebenen, plattenförmigen Bauteilen in eine zweiachsig gekrümmte Form Download PDF

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Publication number
EP0373430B1
EP0373430B1 EP89122126A EP89122126A EP0373430B1 EP 0373430 B1 EP0373430 B1 EP 0373430B1 EP 89122126 A EP89122126 A EP 89122126A EP 89122126 A EP89122126 A EP 89122126A EP 0373430 B1 EP0373430 B1 EP 0373430B1
Authority
EP
European Patent Office
Prior art keywords
component
blasting
shot
shotblasting
process according
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
EP89122126A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0373430A2 (de
EP0373430A3 (en
Inventor
Winfried Dr. Köhler
Klaus-Peter Dr. Hornauer
Reiner Prof.Dr. Kopp
Klaus Dr. Baldner
Frank Dipl.-Ing. Wüstefeld
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 EP0373430A2 publication Critical patent/EP0373430A2/de
Publication of EP0373430A3 publication Critical patent/EP0373430A3/de
Application granted granted Critical
Publication of EP0373430B1 publication Critical patent/EP0373430B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/20—Bending sheet metal, not otherwise provided for
    • 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
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/06—Deforming sheet metal, tubes or profiles by sequential impacts, e.g. hammering, beating, peen forming
    • 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
    • Y10T29/479—Burnishing by shot peening or blasting

Definitions

  • the invention relates to a method of the type specified in the preamble of claim 1.
  • the blasting medium is accelerated on the component surface by centrifugal wheels.
  • a number of such centrifugal wheels are distributed across the relative movement between the tool and the component, and the component is clamped on a receiving table.
  • the previously known shaping devices or methods by means of blasting agents directed against the component surface do not allow, or only incompletely, the shaping of flat plates into a shape with a biaxial curvature.
  • the object of the present invention is to bring flat components into a biaxially curved shape by means of shot-peening, and in particular also components which have jumps in thickness.
  • the method according to the invention uses, for the shaping of flat components into a shape with a biaxial curvature, the known spherical jet shaping, the shaping being carried out with the aid of a preferably computer-controlled beam impact and the direction and strength of the ball impact depending on the dimensions of the component, e.g. depending on the wall thickness or changes in wall thickness over the extent of the component, and is preset to predetermined areas of the same elongation.
  • a major advantage here is that the necessary thickness levels of the component can be provided by mechanical milling before the shot peening and the component can be reshaped with the finished milled contours. It is also advantageous that the components to be formed can be reshaped directly in the hardened state, so that subsequently no heat treatment of the component is required and heat distortion and changes in the material structure due to the heat treatment are thus excluded. Furthermore, the method according to the invention results in a reduced number of processing steps. In addition, the shaping of the component can be reproduced using computer-controlled beam application. Using the method, processing can react flexibly to changes in wall thickness or changes in the material properties of the component.
  • a component 1 is shown in Figures 1 and 2, which is composed of several individual elements 3.
  • the individual segments 3 are formed by means of the method according to the invention from flat plate parts into a shape with a biaxial curvature, as can be seen from FIG. 3.
  • the component or segment 3 to be formed from a flat plate has thickness areas formed by mechanical milling in the area of the outer contour, namely an area 5 of approximately 4.5 mm thick, an area 6 of approximately 3.5 mm thick and an area 7 of about 2.6 mm thick. These differences in thickness are formed by mechanical milling before bending into a biaxial curvature of the flat plates 3 on the component.
  • the shaping of the planar components 3 into a biaxially curved shape by irradiating the component surface takes place in accordance with the method in that the blasting agent jets follow the contour of the component 3 when the component surface is covered.
  • the shaping is effected by using certain beam parameters and following a predetermined beam strategy.
  • the beam traces guided over the component 3 are approximated in the form of a polygon pattern to the geometry of the component 3.
  • the component 3 has an upper and in its longitudinal direction a lower contour surface 8 and adjoining side surfaces 9, the center or the central region of the component surface 10 to be irradiated being designated by M here.
  • the computer-controlled guidance of the beam traces generated by the beam device on the component side 10 to be acted on (concave) can be seen from FIG. 4.
  • the beam traces run along lines 11 indicated in FIG. 4 and are adapted to the component geometry and have approximately the same elongation.
  • the arrangement of the beam traces causes the corresponding expansion distribution to be generated, the component 3 in the central region 11 being to experience the greatest expansion.
  • the flat component or sheet metal can first be picked up and fixed in a convex position, depending on its forming behavior, by a clamping device.
  • the component 3 is then blasted from the convexly curved side with the aid of the accelerated blasting balls, so that a pre-curvature can be produced in the desired direction.
  • the component 3 is clamped or fixed in a concave position from the outset, so that an elastic pre-curvature is produced.
  • the shot is then irradiated from the concave side in order to achieve the necessary expansion in the component and the desired curvature.
  • blasting is carried out on lines 11 of the same strain with the aid of a computer control, the blasting tracks being adapted to the geometry of the component 3.
  • the beam energy is varied over the component surface 10, the energy gradient decreasing from the inner component surface to the outer component edge 8, 9.
  • the ratio of longitudinal curvature to transverse curvature is influenced by corresponding energy distribution along the beam traces 11.
  • the degree of coverage is varied, for example, between 10% and 2 x 98% over the component surface 10.
  • the edge regions of the component 3 provided with milling steps or thickness jumps 5, 6 and 7 are treated with adapted beam parameters due to the varying thickness after certain manufacturing steps of the central region M of the component 3.
  • a convex mold support or concave relief is used which is adapted to the component geometry (FIG. 5).
  • the clamping is formed by a base plate 16 on which supports 18 are arranged on frame parts 17, which are used to fix the component 3 by means of suspensions 19 on the rods 18 and suspension brackets 20 on the component 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Springs (AREA)
  • Laser Beam Processing (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP89122126A 1988-12-14 1989-11-30 Verfahren zum Umformen von ebenen, plattenförmigen Bauteilen in eine zweiachsig gekrümmte Form Expired - Lifetime EP0373430B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3842064 1988-12-14
DE3842064A DE3842064A1 (de) 1988-12-14 1988-12-14 Verfahren zum umformen von ebenen, plattenfoermigen bauteilen in eine zweiachsig gekruemmte form

Publications (3)

Publication Number Publication Date
EP0373430A2 EP0373430A2 (de) 1990-06-20
EP0373430A3 EP0373430A3 (en) 1990-12-05
EP0373430B1 true EP0373430B1 (de) 1995-02-01

Family

ID=6369137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89122126A Expired - Lifetime EP0373430B1 (de) 1988-12-14 1989-11-30 Verfahren zum Umformen von ebenen, plattenförmigen Bauteilen in eine zweiachsig gekrümmte Form

Country Status (3)

Country Link
US (1) US5072606A (Direct)
EP (1) EP0373430B1 (Direct)
DE (2) DE3842064A1 (Direct)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4413369C2 (de) * 1994-04-19 1996-08-29 Hornauer Klaus Peter Dr Ing Schalenförmiges Werkstück
DE19503620C2 (de) * 1995-02-03 1998-07-16 Daimler Benz Aerospace Ag Verfahren zum Umformen eines plattenförmigen Bauteils
FR2745509B1 (fr) * 1996-03-01 1998-04-24 Lohr Ind Procede de fabrication d'un corps de benne a profil concave
US5877405A (en) * 1996-06-07 1999-03-02 Electronics Incorporated Gage for measuring the intensity of shot-blast peening using non-magnetic test strips held in place by spring-loaded plungers
PL195102B1 (pl) * 1999-07-19 2007-08-31 Univ California Sposób formowania kształtów i konturów w metalowym przedmiocie i układ do formowania kształtów i konturów w metalowym przedmiocie
US6670578B2 (en) * 1999-07-19 2003-12-30 The Regents Of The University Of California Pre-loading of components during laser peenforming
CA2317845C (en) * 2000-09-08 2006-12-19 Steven Kennerknecht Shaped metal panels and forming same by shot peening
US6651299B2 (en) * 2000-10-13 2003-11-25 Toyota Jidosha Kabushiki Kaisha Method and apparatus for manufacturing endless metallic belt, and the endless metallic belt manufactured by the method
DE10146693A1 (de) * 2001-09-21 2003-04-10 Bernd Viehweger Verfahren zum freien Umformen
US7065479B2 (en) * 2002-05-28 2006-06-20 General Electric Company Method for determining and compensating for peening-induced distortion
DE10328103A1 (de) * 2002-12-09 2005-02-24 ZF Lemförder Metallwaren AG Vorrichtung zum Einstellen eines mittels einer Lagereinrichtung schwenkbar gelagerten Anschlussteils
DE102005024627A1 (de) 2005-05-30 2006-12-07 Mt Aerospace Ag Vakuumgestütztes Verfahren und Vorrichtung zum Umformen eines im Wesentlichen flächigen Rohlings aus Metall zu einem dünnwandigen Schalenkörper sowie deren Verwendung
EP1870612B2 (de) * 2006-06-23 2012-08-08 Muhr und Bender KG Randschichtverbessern von Tellerfedern oder Wellfedern
DE102008003882B4 (de) * 2008-01-10 2011-12-15 Otto Fuchs Kg Verfahren zum Herstellen eines Gegenstandes aus Metall, insbesondere aus einer hochfesten Aluminiumlegierung sowie Verfahren zum Richten eines solchen Gegenstandes
DE102008035585A1 (de) * 2008-07-31 2010-02-04 Rolls-Royce Deutschland Ltd & Co Kg Verfahren zur Herstellung metallischer Bauteile
DE102010013207B4 (de) 2010-03-29 2013-09-05 Mt Aerospace Ag Verfahren zum Umformen von wenigstens einem im Wesentlichen ebenflächigen Rohling zu einem Schalenkörper und dessen Verwendung
CN102756339B (zh) * 2012-07-27 2015-04-29 中国航空工业集团公司北京航空制造工程研究所 一种防止壁板面内弯曲的保型喷丸强化和校正方法
JP6104725B2 (ja) 2013-06-12 2017-03-29 三菱重工業株式会社 板状ワークの捩り保持装置および捩り保持方法ならびに捩り成形方法
JP6115554B2 (ja) * 2014-12-08 2017-04-19 トヨタ自動車株式会社 ショットピーニング方法
US9902482B2 (en) * 2015-10-28 2018-02-27 The Boeing Company Deep rolling forming
CN109376412A (zh) * 2018-10-08 2019-02-22 吉林大学 基于温度场的等效喷丸数值模拟方法
CN117921551B (zh) * 2024-03-25 2024-07-12 成都飞机工业（集团）有限责任公司 一种用于控制框类零件变形的喷丸校正方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3705511A (en) * 1969-10-17 1972-12-12 Avco Corp Low penetration ball forming process
GB2118085A (en) * 1982-04-15 1983-10-26 Klaus Peter Hornauer Method and apparatus for the deformation of workpieces
US4694672A (en) * 1984-01-05 1987-09-22 Baughman Davis L Method and apparatus for imparting a simple contour to a workpiece

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3668912A (en) * 1970-07-08 1972-06-13 Carborundum Co Shot peening apparatus
US4329862A (en) * 1980-01-21 1982-05-18 The Boeing Company Shot peen forming of compound contours
DE3111148A1 (de) * 1981-03-21 1982-10-07 Klaus-Peter Dipl.-Ing. 5100 Aachen Hornauer Verfahren und vorrichtung zur formaenderung bei blechen und tafeln

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3705511A (en) * 1969-10-17 1972-12-12 Avco Corp Low penetration ball forming process
GB2118085A (en) * 1982-04-15 1983-10-26 Klaus Peter Hornauer Method and apparatus for the deformation of workpieces
US4694672A (en) * 1984-01-05 1987-09-22 Baughman Davis L Method and apparatus for imparting a simple contour to a workpiece

Also Published As

Publication number Publication date
US5072606A (en) 1991-12-17
EP0373430A2 (de) 1990-06-20
DE3842064C2 (Direct) 1990-11-08
EP0373430A3 (en) 1990-12-05
DE58908968D1 (de) 1995-03-16
DE3842064A1 (de) 1990-06-21

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