US3834199A - Method and machine for corrugating or pleating sheet metal - Google Patents

Method and machine for corrugating or pleating sheet metal Download PDF

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Publication number
US3834199A
US3834199A US00332142A US33214273A US3834199A US 3834199 A US3834199 A US 3834199A US 00332142 A US00332142 A US 00332142A US 33214273 A US33214273 A US 33214273A US 3834199 A US3834199 A US 3834199A
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United States
Prior art keywords
sheet
rolls
gas
point
contact
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Expired - Lifetime
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US00332142A
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English (en)
Inventor
G Rouyer
M Fremont
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Airbus Group SAS
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Airbus Group SAS
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    • 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
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
    • B21D13/045—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling the corrugations being parallel to the feeding movement

Definitions

  • ABSTRACT In order to corrugate or pleat between forming rolls sheet metal irrespective of its ductility while containing the blister formed at the end of the corrugation or pleat in the course of formation, the sheet is heated locally, at a short distance upstream of the rolls, to a temperature capable of rendering the sheet ductile. The rolls are protected against harmful heating by the distance between the heating region and the forming rolls.
  • This containment which is preferably ensured by pressing means in rolling or sliding contact with the sheet throughout the corrugating operation permits causing the blister to perform the function of a regulator of the distribution of material and thus effectively corrugating in the cold state a large number of materials.
  • certain metals, and in particular certain alloys such as titanium alloys do not have sufficient ductility to be cormgated in this manner either because they rapidly work harden which diminishes their capacity to elongate or because they possess a large elastic return which reduces the effectiveness of the action of the rolls or because they have both these features.
  • An object of the present invention is to permit the treatment also of such materials and consequently to pennit corrugating or pleating all kinds of metals irrespective of their initial ductility.
  • the present invention provides a method for corrugating or pleating sheet metal comprising passing the sheet between two forming rolls having conjugate profiles while ensuring a continuous containment of the blister, formed at the end of the corrugation or pleat in the course of formation, between limits which are fixed with respect to the region of contact between the sheet and the forming rolls, wherein the sheet is locally heated upstream of the roll contact point to a temperature capable of modifying the mechanical characteristics of the metal of the sheet and render it sufficiently ductile.
  • the heating is effected by projection of a gas brought to a high temperature upstream of the roll contact point.
  • the metal is thus brought to a high temperature before it is engaged and deformed by the rolls, that is to say at a point very close to the point at which the blister is formed.
  • the temperature must be such as to modify the mechanical characteristics of the metal and increase its ductility in such manner as to permit imparting thereto a real elongation under the action of the forming rolls, that is to say to corrugate or pleat it in the desired manner and avoid a resilient return to its initial form, that is to say to ensure that the deformation is maintained.
  • the heating is however carried out at a slight distance from the point of contact with the rolls so as to avoid greatly heating the rollers which would be liable to deform the sheet and adversely affect the precision of the corrugation.
  • Another object of the invention is to provide a machine for carrying out the method defined hereinbefore.
  • the invention provides a machine comprising a pair of forming rolls having conjugate profiles driven by drive means, a support for the sheet to be treated, and
  • blister-containing means in contact with said sheet, wherein there are provided a source of gas under pressure, means for heating said gas, and a nozzle for projecting the hot gas onto the sheet upstream of the forming rolls at a slight distance from the contact of the rolls with the sheet.
  • the FIGURE of the drawing shows diagrammatically a machine for corrugating or pleating a sheet of metal.
  • This machine comprises essentially two forming rolls 1 and 2 having conjugate profiles, namely a male roll and a female roll. These rolls are driven simultaneously by a drive system 4 so as to rotate at speeds which are the same but in opposite directions.
  • a sheet 6 to be corrugated or pleated is introduced between the rolls and maintained and guided therein by systems of which only a rod 8 carrying a wheel 9 and a lower roller 10 have been shown in the FIGURE so as to render the latter more clear.
  • Thenumber and disposition of these rollers and wheels depend on the dimensions and shape of the sheet.
  • the machine Upstream of the rolls 1 and 2, the machine comprises a lower roller 12 and an upper roller 14 which perform the function of rollers for containing the blister 15 formed in the metal of the sheet 6 at the end of the corrugation or pleat 16 which is formed.
  • This blister which is constituted by the material which is upset and urged back from the point at which the rolls 1 and 2 deform the sheet, extends upstream of the sheet 6 and is strictly limited by the clamping of this sheet between the rollers 12 and 14.
  • the upper roller 14 is movable so as to permit withdrawing it, for example when the sheet 6 is introduced in the machine. Further, the roller 14 is associated with a guide roller 18 which rolls along a previously-formed corrugation or pleat 19.
  • a furnace 20 is mounted on the machine and heated for example by means of an electric resistance 22.
  • the fumace has a cylindrical inner cavity 24 which is put in communication with a source of gas 26, preferably .under pressure, by way of piping 28 and with a nozzle 30 by way of a pipe 32.
  • the nozzle 30 is supported by the frame (not shown) of the machine in such manner as to open onto the sheet in the neighbourhood of the point at which the rolls 1 and 2 engage the sheet but slightly upstream of the rolls with respect to the direction of motion of the sheet through the latter.
  • the gas from the reservoir 26 is heated in the furnace 20 and projected under the sheet 6 just before the sheet passes between the rolls 1 and 2.
  • the metal of the sheet is then brought locally to a high temperature which is so chosen in accordance with the nature of the metal as to impart to the latter sufficient ductility to permit its deformation, that is to say, to increase its capacity to elongate while decreasing its elasticity.
  • the sheet which passes between-the rolls 1 and 2 may receive a deformation in the shape of a corrugation having a V-section or trapezoidal section corresponding to the profiles of the rolls 1 and 2 and retains this shape when it leaves the forming rolls upon cooling.
  • the temperature of the gas issuing from the cylindrical cavity 24 is high enough to modify the mechanical characteristics of the metal of the sheet 6 and the gas is supplied to this sheet at a slight distance from the rolls 1 and 2 so as to avoid the adverse affect the heat ing would have on the rolls 1 and 2 the profile of which has been determined with precision and corresponds exactly to the shape of the corrugations or pleats to be obtained.
  • air under pressure is heated to a temperature of 400C and then ejected by way of the nozzle 30 onto the underside of the sheet which is fed at a speed on the order of 2 metres per minute.
  • the region of the sheet located upstream of the rollers (region indicated at 36 in the FIGURE) is then brought to a temperature of about 250C.
  • This very hot region is slightly upstream of the point at which the rolls 1 and 2 engage the sheet so that the rolls are not themselves brought to a temperature liable to deform them. Consequently, the profiles of the rolls remain strictly unchanged and the corrugations or pleats formed have the dimensions exactly corresponding to those of these profiles.
  • a helical corrugation having a trapezoidal section having a height of 3.70 mm anda pitch of 6.1 mm in a sheet of titanium alloy hav-- ing a thickness of 0.15 mm.
  • heating temperature depends on the nature of the metal of the sheet 6 and the thickness of this sheet.
  • the gas employed for the heating may be air under pressure, nitrogen, argon, or any other suitable gas.
  • a jet of neutral gas permits isolating the sheet from the surrounding atmosphere and avoiding danger of oxidation by the air.
  • it may be suitable to replace the heating gas by some other heating means, for example laser, electric or any other heating means for obtaining a localized heating of a relatively small area of the sheet in the vicinity of the point at which the rolls engage the sheet and regulating the temperature of this area to the desired value.
  • the furnace 20 may be replaced by another system for heating the gas.
  • the sheet is locally heated on its portion where the blister is formed, in a point close to the forming rolls and upstream of the roll contact point, with respect to the direction of travel of the sheet, by one jet of hot gas, to a temperature capable of modifying the mechanical characteristics of the metal of the sheet and render it sufficiently ductile.
  • a machine for folding corrugations in sheet metal comprising a pair of forming rolls having conjugate profiles, drive means for driving the rolls in rotation, a support for the sheet, and blister-containing means in contact with said sheet for containing the blister which is formed; the provision of a source of gas under pressure, means for heating the gas, and a nozzle for projecting one jet of hot gas onto the sheet upstream of the forming rolls at a slight distance from the point of contact between the rolls and the sheet, between said point of contact and the blister-containing means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00332142A 1972-02-16 1973-02-13 Method and machine for corrugating or pleating sheet metal Expired - Lifetime US3834199A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7205138A FR2171924B1 (enExample) 1972-02-16 1972-02-16

Publications (1)

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US3834199A true US3834199A (en) 1974-09-10

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US (1) US3834199A (enExample)
FR (1) FR2171924B1 (enExample)
GB (1) GB1415363A (enExample)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3950976A (en) * 1974-12-12 1976-04-20 General Electronic Seet - G. E. S. Method and device for forming tubes
US6640604B2 (en) * 2001-02-14 2003-11-04 Fujitsu Limited Laser bending method and apparatus for bending a work piece in normal and reverse directions
US6655184B2 (en) * 2001-10-04 2003-12-02 Rohr, Inc. Warm/hot corrugation machine and method for corrugating low-ductility foils
US20050284204A1 (en) * 2004-06-28 2005-12-29 Carsley John E Roller hemming apparatus and method
US20060156781A1 (en) * 2003-06-27 2006-07-20 Matti Leiponen Method and equipment for performing continuous extrusion
US20110179842A1 (en) * 2008-10-02 2011-07-28 Data M Sheet Metal Solutions Gmbh System for cold roll forming profiles having variable cross-sections
US20130062003A1 (en) * 2010-05-17 2013-03-14 Magna International Inc. Method and apparatus for forming materials with low ductility
US11477993B2 (en) * 2016-11-18 2022-10-25 Norse Dairy Systems, Llc Servo driven ice cream sandwich assembly and wrapping machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB125544A (en) * 1918-07-08 1919-04-24 Dermot Joseph Mooney Improvements in Treating Steel for Aircraft.
US2064182A (en) * 1935-06-04 1936-12-15 Earl F Spence Roll temperature regulator for sheet mills
US2730916A (en) * 1949-05-25 1956-01-17 Gavurin Jacob Die rolling machine
US3376726A (en) * 1964-01-14 1968-04-09 Nord Aviat Soc Nat De Constrnc Sheet material folding method and machine for carrying out said method
US3503240A (en) * 1966-08-01 1970-03-31 James R Lawler Heat treating method and apparatus
US3613425A (en) * 1970-01-29 1971-10-19 United States Steel Corp Annealing strip during cold rolling

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080473A (en) * 1955-08-02 1963-03-05 Lockheed Aircraft Corp Pressure and thermal material forming device
FR2024074A1 (en) * 1969-09-22 1970-08-21 Lawler James Roller profiling equipment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB125544A (en) * 1918-07-08 1919-04-24 Dermot Joseph Mooney Improvements in Treating Steel for Aircraft.
US2064182A (en) * 1935-06-04 1936-12-15 Earl F Spence Roll temperature regulator for sheet mills
US2730916A (en) * 1949-05-25 1956-01-17 Gavurin Jacob Die rolling machine
US3376726A (en) * 1964-01-14 1968-04-09 Nord Aviat Soc Nat De Constrnc Sheet material folding method and machine for carrying out said method
US3503240A (en) * 1966-08-01 1970-03-31 James R Lawler Heat treating method and apparatus
US3613425A (en) * 1970-01-29 1971-10-19 United States Steel Corp Annealing strip during cold rolling

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3950976A (en) * 1974-12-12 1976-04-20 General Electronic Seet - G. E. S. Method and device for forming tubes
US6640604B2 (en) * 2001-02-14 2003-11-04 Fujitsu Limited Laser bending method and apparatus for bending a work piece in normal and reverse directions
US6655184B2 (en) * 2001-10-04 2003-12-02 Rohr, Inc. Warm/hot corrugation machine and method for corrugating low-ductility foils
US20060156781A1 (en) * 2003-06-27 2006-07-20 Matti Leiponen Method and equipment for performing continuous extrusion
US7257980B2 (en) * 2003-06-27 2007-08-21 Matti Leiponen Method and equipment for performing continuous extrusion
US20050284204A1 (en) * 2004-06-28 2005-12-29 Carsley John E Roller hemming apparatus and method
US7290423B2 (en) * 2004-06-28 2007-11-06 Gm Global Technology Operations, Inc. Roller hemming apparatus and method
US20110179842A1 (en) * 2008-10-02 2011-07-28 Data M Sheet Metal Solutions Gmbh System for cold roll forming profiles having variable cross-sections
US20130062003A1 (en) * 2010-05-17 2013-03-14 Magna International Inc. Method and apparatus for forming materials with low ductility
US11477993B2 (en) * 2016-11-18 2022-10-25 Norse Dairy Systems, Llc Servo driven ice cream sandwich assembly and wrapping machine

Also Published As

Publication number Publication date
GB1415363A (en) 1975-11-26
FR2171924A1 (enExample) 1973-09-28
FR2171924B1 (enExample) 1976-07-23
DE2306724A1 (de) 1973-08-23
DE2306724B2 (de) 1976-03-25

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