WO1982003192A1 - Procede et dispositif pour modifier la forme de surfaces et de plaques - Google Patents

Procede et dispositif pour modifier la forme de surfaces et de plaques Download PDF

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Publication number
WO1982003192A1
WO1982003192A1 PCT/DE1982/000058 DE8200058W WO8203192A1 WO 1982003192 A1 WO1982003192 A1 WO 1982003192A1 DE 8200058 W DE8200058 W DE 8200058W WO 8203192 A1 WO8203192 A1 WO 8203192A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
impact
stamp
workpiece
tool surface
Prior art date
Application number
PCT/DE1982/000058
Other languages
German (de)
English (en)
Inventor
Boelkow Blohm Gmbh Messerschmitt
Original Assignee
Kopp Reiner
Hornauer Klaus Peter
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 Kopp Reiner, Hornauer Klaus Peter filed Critical Kopp Reiner
Priority to AT82900949T priority Critical patent/ATE10485T1/de
Publication of WO1982003192A1 publication Critical patent/WO1982003192A1/fr

Links

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
    • 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

Definitions

  • the invention relates to a method of the type specified in the preamble of patent claim 1. Furthermore, the invention relates to a device for carrying out said method.
  • a method of this type is known from DE-OS 29 06 509.
  • This beam are edium, rules Ku ⁇ particular, accelerated in a pressure jet and directed at a rate of 10 to '90 m / s on the surface of workpieces to bring about a deformation of bending that is superior.
  • the individual balls are classified within certain diameter ranges and, due to their conveyance in the material jet, hit the impact surface in a statistically distributed manner.
  • the invention is based on the object of achieving a shaping which has been targeted from the outset, and in particular a specific curvature, “in the case of sheets and plates, without the possibility of shaping the To be able to use the material only to a limited extent due to the intended forming directions. Above all, this is intended to achieve an increased dimensional accuracy of the forming, and undesired workpiece stretching should also be largely avoided. The change in shape should be even more pronounced in one plane, whereby the conditions for avoiding or at least reducing a change in the thickness of the sheets or sheets should be met. Finally, the considerable mechanical outlay, as was necessary in the previous shaping by means of material radiation, is to be considerably reduced.
  • OMPI only a precisely dimensioned curvature is achieved, but also an extension in the longitudinal direction, that is to say transversely to the direction of curvature, is practically excluded.
  • the formation of a geometrically precisely predetermined curvature can be made considerably easier by first clamping the workpiece with two opposing edges and then elastically bending it to the extent of the intended change in shape or curvature while the clamping means are approaching, whereupon the dynamic loading of the workpiece surface e follows.
  • the shape change achieved is practically free by
  • the further improvement of the uniformity of the reshaping is achieved by guiding the punch over the workpiece surface in essentially parallel lines and covering the impact areas within the line-wise impact tracks in the longitudinal direction.
  • the extent of the length can be determined by interpolation and extrapolation if one starts from two advantageous assignments, one of which provides a tool area of approximately 2 ⁇ 12 mm for workpiece thicknesses between 5 to 8 mm, whereas the other one Workpiece thickness of 8 to 20 mm provides a tool surface of 2 x 27 mm.
  • the punch or tools or tools can be used directly for the impact loading of the workpiece surface, it is in the interest of improved control of the shape change process to guide the tools themselves lying on the workpiece surface and to dynamically load them by means of a percussion piston.
  • the tools transmit the impulse of the percussion piston, whereby the relative position between the workpiece surface and the tool is particularly reliably ensured.
  • the kinetic energy is thus applied via the piston. Its mass is less of an effect than the speed it has when it hits the punch. The latter in turn depends on the action of the piston as well as on the stroke when a pressurized fluid is applied to the piston. A satisfactory change in shape is achieved if the cross section and also the stroke of the piston are increased proportionally as the sheet thickness increases, a sheet thickness of 5 to 8% increasing
  • the piston is useful within a compressed air
  • OMPI Cylinder can be acted upon on both sides, specifically with compressed air which can be controlled in the range from 2 to 10 bar.
  • the length of the stroke is between about 40 to 120 mm.
  • the * inventive device has in particular a punch having a cylindrical shank, the ist.und out can be acted upon by a piston in a conventional manner.
  • this shaft is designed as a tool surface.
  • the latter is advantageously carried out on a widening base of the shaft and is rectangular with rounded corner shapes. Instead of the rounded corners, semicircular surfaces attached on the narrow side can also occur. It is particularly advantageous to surround the tool surface directly with a hem surface whose level in the direction of action is set back by approximately 0.05 to 0.5 mm with respect to the plane of the tool surface. If the tool surface should penetrate the material, this type of recessed hem surface leads to the hem surface contacting the workpiece surface at a penetration depth of more than 0.05 to 0.5 mm. This immediately reduces the specific surface load, so that another
  • the hem surface is therefore expediently formed on each long side of the tool surface and has about the same width as the tool surface.
  • the tool surface or the hem surface also expediently merges into the stamp or into its base via a rounded edge.
  • the formation of sharp-edged surface defects can thus be avoided with certainty.
  • the übergangsber I following the work of convincing area or the seam area widens in übri gen appropriate trapezoidal towards the wider So ⁇ ckel the stamp.
  • FIG. 1 shows a workpiece with a change in shape according to the invention
  • Figure 2 shows the line-wise application of a piece according to the invention
  • Figure 1 shows a * sheet 1, which was dynamically loaded in its longitudinal direction with a stamp by guiding this stamp along the longitudinal direction 2. It continued to run in several ' parallel ' tracks.
  • the individual loading surface has a width 6 and a length 7 extending in the longitudinal direction 2, the latter being preferably six times the width.
  • the overlapping impact areas form impact tracks 8, 9, the spacing 10 of which, in the illustration in FIG. 2, is approximately the same width as the width 6 of the impact area or the impact track 8.
  • the feed can be increased or the impact frequency reduced, so that the individual impact surfaces 4 finally no longer overlap one another.
  • FIG. 3 A cylindrical shaft 11 whose lower end is designed as a tool surface 12 can first be seen, the latter being shown in plan view in the lower part of FIG. 3.
  • the tool surface 12 is formed on the widening base 13 of the shaft 11 and has an essentially rectangular shape. Your - - 8th -
  • Length 7 fulfills the condition of being about six times the width 5.
  • Semicircular surfaces 14 are attached to the narrow sides of the tool surface 12.
  • the tool surface 12 is directly surrounded by a hem surface 15, which is offset parallel to the plane of the tool surface 12 opposite to the direction of impact 16.
  • the extent 17 of this dislocation is between 0.05 to 0.5 mm.
  • the hem surface extends to both longitudinal sides of the tool surface 12 and there is of a width 18 which is approximately the same as the width 5 of the tool surface 12.
  • a workpiece may well lie on a soft, yielding material, such as foam or the like, during the treatment according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

Pour la transformation de toles et de plaques dans une direction unie, l'invention prevoit une injection de la surface superieure du materiau par une surface oblongue de l'outil avec un rapport de la longueur a la largeur de plus de 3, en particulier de plus de 6 en evitant au maximum les modifications d'epaisseur. La surface de l'outil a la forme d'une empreinte. Une variation inadmissible de l'epaisseur limite en outre une large surface d'encadrement de la surface de l'outil a 0,05 jusqu'a 0,5 mm opposee a la direction du coup. La piece en travail s'incurve en raison de la charge perpendiculairement a la direction longitudinale de la surface de l'outil. Par une incurvation prealable, les tensions elastiques des toles elastiquement fixees s'annulent par la charge, de sorte que, en liaison avec ce traitement, la piece en travail peut conserver la courbure geometrique exacte et definitive conferee par les moyens de tension.
PCT/DE1982/000058 1981-03-21 1982-03-16 Procede et dispositif pour modifier la forme de surfaces et de plaques WO1982003192A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82900949T ATE10485T1 (de) 1981-04-22 1982-03-23 Verfahren zur oxidation von reaktiven aromaten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813111148 DE3111148A1 (de) 1981-03-21 1981-03-21 Verfahren und vorrichtung zur formaenderung bei blechen und tafeln
DE3111148810321 1981-03-21

Publications (1)

Publication Number Publication Date
WO1982003192A1 true WO1982003192A1 (fr) 1982-09-30

Family

ID=6127932

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1982/000058 WO1982003192A1 (fr) 1981-03-21 1982-03-16 Procede et dispositif pour modifier la forme de surfaces et de plaques

Country Status (3)

Country Link
EP (1) EP0074967B1 (fr)
DE (1) DE3111148A1 (fr)
WO (1) WO1982003192A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104451078A (zh) * 2013-09-19 2015-03-25 波音公司 用于冲击航空航天应用的金属部件的方法和设备
JP2018051612A (ja) * 2016-09-29 2018-04-05 三菱重工業株式会社 成形方法および成形装置
US10576523B1 (en) 2013-09-19 2020-03-03 The Boeing Company Method and apparatus for impacting metal parts

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3231673A1 (de) * 1982-08-26 1984-03-01 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Verfahren zur formaenderung eines plattenfoermigen werkstuecks
DE3502303C1 (de) * 1985-01-24 1986-08-28 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Vorrichtung zum Halten und/oder Zu- bzw. Abfuehren eines elastisch verformbaren Bauteils
DE3842064A1 (de) * 1988-12-14 1990-06-21 Dornier Gmbh Verfahren zum umformen von ebenen, plattenfoermigen bauteilen in eine zweiachsig gekruemmte form
DE4005567A1 (de) * 1990-02-22 1991-08-29 Friedrich Engels Verfahren zum profilieren von plattenfoermigen blechen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR582472A (fr) * 1923-06-25 1924-12-19 Krupp Ag Procédé pour la production de dépressions dans des tôles
US3937055A (en) * 1974-11-06 1976-02-10 The United States Of America As Represented By The United States National Aeronautics And Space Administration Method of peening and portable peening gun
US4016741A (en) * 1975-12-29 1977-04-12 Sitter Spencer B Bracelet domer
DE2903929A1 (de) * 1979-02-02 1980-08-07 Eckold Vorrichtung Verfahren zum formrichten von blechteilen, vorrichtung zu seiner durchfuehrung und anwendung des verfahrens

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE450541C (de) * 1927-10-12 Cassens Schiffswerft Und Masch Vorrichtung zum Formen von Blechen, insbesondere Schiffsblechen
DE745807C (de) * 1940-08-10 1944-05-15 Fahrzeugfabrik Verwendung einer Streckziehpresse zum Formstanzen von Blechen
DE951563C (de) * 1951-10-30 1956-10-31 Langenstein & Schemann Ag Verfahren zur Herstellung von Blechformteilen mit Hilfe von Gesenken
US2938412A (en) * 1957-06-14 1960-05-31 Floyd L Walker Sheet metal reforming tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR582472A (fr) * 1923-06-25 1924-12-19 Krupp Ag Procédé pour la production de dépressions dans des tôles
US3937055A (en) * 1974-11-06 1976-02-10 The United States Of America As Represented By The United States National Aeronautics And Space Administration Method of peening and portable peening gun
US4016741A (en) * 1975-12-29 1977-04-12 Sitter Spencer B Bracelet domer
DE2903929A1 (de) * 1979-02-02 1980-08-07 Eckold Vorrichtung Verfahren zum formrichten von blechteilen, vorrichtung zu seiner durchfuehrung und anwendung des verfahrens

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104451078A (zh) * 2013-09-19 2015-03-25 波音公司 用于冲击航空航天应用的金属部件的方法和设备
EP2851441A3 (fr) * 2013-09-19 2015-04-08 The Boeing Company Procédé et appareil pour percuter des pièces métalliques pour des applications aérospatiales
AU2014204472B2 (en) * 2013-09-19 2017-08-31 The Boeing Company Method and apparatus for impacting metal parts for aerospace applications
US10576523B1 (en) 2013-09-19 2020-03-03 The Boeing Company Method and apparatus for impacting metal parts
US11717873B2 (en) 2013-09-19 2023-08-08 The Boeing Company Method and apparatus for impacting metal parts
JP2018051612A (ja) * 2016-09-29 2018-04-05 三菱重工業株式会社 成形方法および成形装置
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

Also Published As

Publication number Publication date
DE3111148C2 (fr) 1988-09-08
DE3111148A1 (de) 1982-10-07
EP0074967A1 (fr) 1983-03-30
EP0074967B1 (fr) 1986-07-23

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