WO2007077582A1 - Procédé pour réaliser des courbes douces dans une tôle métallique - Google Patents

Procédé pour réaliser des courbes douces dans une tôle métallique Download PDF

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Publication number
WO2007077582A1
WO2007077582A1 PCT/IS2006/000001 IS2006000001W WO2007077582A1 WO 2007077582 A1 WO2007077582 A1 WO 2007077582A1 IS 2006000001 W IS2006000001 W IS 2006000001W WO 2007077582 A1 WO2007077582 A1 WO 2007077582A1
Authority
WO
WIPO (PCT)
Prior art keywords
bend
sheet material
beams
sheet
bars
Prior art date
Application number
PCT/IS2006/000001
Other languages
English (en)
Inventor
Kristjan Arnason
Original Assignee
Verkfraedistofa Kristjans Arnasonar
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 Verkfraedistofa Kristjans Arnasonar filed Critical Verkfraedistofa Kristjans Arnasonar
Priority to PCT/IS2006/000001 priority Critical patent/WO2007077582A1/fr
Publication of WO2007077582A1 publication Critical patent/WO2007077582A1/fr
Priority to IS8704A priority patent/IS2502B/is

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
    • B21D53/00—Making other particular articles
    • B21D53/78—Making other particular articles propeller blades; turbine blades
    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves

Definitions

  • EP 0 834 389 A2 a strap is wound around a sheet metal and tension on the strap used to form soft radius bend.
  • Figure 1 shows cross section of a sheet with bars clamped to the edges and straps in place.
  • Figure 2 shows cross section of the sheet with a loop formed.
  • Figure 3 shows where the loop has been clamped between rectangular bars.
  • Figure 4 shows the clamped sheet with strap and bars removed.
  • Figure 5 shows the sheet clamped between bars when the sheet faces touches.
  • Figure 6 shows the sheet formed when removed from the clamps.
  • Figure 7 shows a typical section of a wing leading edge.
  • Figure 8 shows a typical graph showing bend radius for different material thicknesses and distances between clamping points.
  • Figure 9 shows how the clamping bars can be placed on shaw horses for the simplest application of the bending method.
  • Figure 10 shows how the clamping bars can be made for added strength and reduced deflection.
  • Figure 11 shows how bars can be arranged where relatively long sheet are to be formed.
  • Figure 12 shows how a space block can be arranged to form different bend radiuses and different bend angles.
  • Figure 1 shows section through a sheet metal to be bent.
  • a wood bars (2) slightly longer then the sheet metal are clamped to the sheet metal edges, with C-clamps, or equal distance from intended centerline of bend (5).
  • Straps (3) are placed at each end of the sheet of metal and thightened around the wooden bar (2) ends until a loop of the sheet metal is formed as shown in figure 2.
  • the loop of sheet metal is placed between two rectangular tubes or bars (6) with round corners and the loop is clamped between these bars as shown in figure 3.
  • the wooden bars (2) can be removed and the sheet moved such that the markings (4) on the sheet metal are aligned with the upper surface of the rectangular bars (6).
  • the rectangular bars are then clamped around the sheets until the faces of the sheet touches as shown in figure 6.
  • the sheet metals looks like what is shown in figure 6.
  • the radius formed will depend on the distance between markings on sheet metal.
  • a graph shown in figure 8. would be made before by experimental data obtained by bending strips of sheet metal of different thicknesses and with different distances between markings. It may be necessary to make two curves for each thickness of sheet. One for bending along grain and another for bending across the grain of sheet metal.
  • a sheet of metal can easily be adopted to leading edge of a wing as shown in figure 7. for riveting or glueing. By this method it is quite easy to bend skin for leading edge of a tapered wing by simply having the distance between the clamping points different at each end of the sheet.
  • For long sheets bending it may be necessary to strengthen the rectangular bars (6) as shown in figure 10 or use vertical beams (7) outside the sheet metal loop and clamping together above and below sheet metal loop.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

L'invention concerne un procédé de cintrage d'un matériau en tôle (1), selon lequel des barres (2) sont serrées sur les bords du matériau en tôle (1) ou à égale distance de la ligne de cintrage (5) et une boucle est formée par des feuillards (3). La boucle de matériau en tôle (1) est ensuite pincée conjointement à des poutres (6) alignées sur des repères (4) dont la position sur le matériau en tôle (1) dépend du rayon (R) de cintrage et de l'épaisseur du matériau. L'invention concerne également un procédé de cintrage d'un matériau en tôle (1), selon lequel des poutres (6) sont placées à une certaine distance les unes des autres et une barre arrondie est utilisée pour étirer le matériau en tôle (1) en forme de U entre les poutres (6). Les côtés des poutres sont alors alignés sur les repères (4) et les poutres (6) sont pincées autour du matériau en tôle (1) pour former la courbe.
PCT/IS2006/000001 2006-01-05 2006-01-05 Procédé pour réaliser des courbes douces dans une tôle métallique WO2007077582A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/IS2006/000001 WO2007077582A1 (fr) 2006-01-05 2006-01-05 Procédé pour réaliser des courbes douces dans une tôle métallique
IS8704A IS2502B (is) 2006-01-05 2008-01-14 Aðferð til að forma mjúkar beygjur á málmplötur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IS2006/000001 WO2007077582A1 (fr) 2006-01-05 2006-01-05 Procédé pour réaliser des courbes douces dans une tôle métallique

Publications (1)

Publication Number Publication Date
WO2007077582A1 true WO2007077582A1 (fr) 2007-07-12

Family

ID=36813087

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IS2006/000001 WO2007077582A1 (fr) 2006-01-05 2006-01-05 Procédé pour réaliser des courbes douces dans une tôle métallique

Country Status (1)

Country Link
WO (1) WO2007077582A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB786727A (en) * 1954-05-11 1957-11-27 Edward Archibald Stalker Method and apparatus for making hollow blades for compressors and gas turbines
JPS5462161A (en) * 1977-10-27 1979-05-18 Kobe Steel Ltd Forming method for pipe
US20020124370A1 (en) * 1996-03-01 2002-09-12 Serge Deckert Method for making a skip body with a concave cross section

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB786727A (en) * 1954-05-11 1957-11-27 Edward Archibald Stalker Method and apparatus for making hollow blades for compressors and gas turbines
JPS5462161A (en) * 1977-10-27 1979-05-18 Kobe Steel Ltd Forming method for pipe
US20020124370A1 (en) * 1996-03-01 2002-09-12 Serge Deckert Method for making a skip body with a concave cross section

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 003, no. 083 (C - 052) 18 July 1979 (1979-07-18) *

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