EP3335813B1 - Machine de formage de tôle par étirage longitudinal et procédé de mise en oeuvre d'une telle machine - Google Patents

Machine de formage de tôle par étirage longitudinal et procédé de mise en oeuvre d'une telle machine Download PDF

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Publication number
EP3335813B1
EP3335813B1 EP17306795.0A EP17306795A EP3335813B1 EP 3335813 B1 EP3335813 B1 EP 3335813B1 EP 17306795 A EP17306795 A EP 17306795A EP 3335813 B1 EP3335813 B1 EP 3335813B1
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EP
European Patent Office
Prior art keywords
tipping
axis
chassis
tipping axis
complementary
Prior art date
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Active
Application number
EP17306795.0A
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German (de)
English (en)
French (fr)
Other versions
EP3335813A1 (fr
Inventor
Benoît BOURRIAU
Julien Clergeau
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ACB
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Priority to PL17306795T priority Critical patent/PL3335813T3/pl
Publication of EP3335813A1 publication Critical patent/EP3335813A1/fr
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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
    • B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
    • B21D25/04—Clamping arrangements
    • 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
    • B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening

Definitions

  • the present invention relates to the general field of forming or forming sheets (in particular metal sheets) by longitudinal stretching by means of drawing presses.
  • this machine for forming sheet metal by longitudinal stretching, this machine comprising two drawing heads located on either side of a forming tool for the sheet, which drawing heads each comprise a jaw line secured to a support structure which is associated with drawing means and which is mounted on a frame by means of a tilting axis, and at least one tilt cylinder being interposed between said frame and said support structure, to allow rotation of said support structure about said tilting axis.
  • the machines or longitudinal drawing presses are conventionally constituted by two drawing heads arranged vis-à-vis, each comprising a line of jaws for gripping the edges of width of the sheet that is desired to conform.
  • a forming tool on the active side of which the sheet is intended to be applied by force, for the purpose of shaping.
  • the active face of this forming tool is adapted to the profile of the part that one wishes to obtain.
  • the lines jaws vis-à-vis are each associated with actuating cylinders to adapt their positioning in space and to implement the desired stretching function.
  • each jaw line is carried by a support structure equipped with drawing jacks; and this support structure is mounted on a frame by means of a horizontal tilting axis subjected to the action of one or more tilting cylinders.
  • the two frames which carry the jaw lines are mounted on a support frame, at least one of them slidably along an axis of displacement parallel to the axis of stretching.
  • EP-1,726,377 relates to a longitudinal drawing press provided with curved jaw lines, which makes it possible to create a differential traction movement between the central jaw and the peripheral jaws, so as to tend to standardize the drawing state on the surface of the jaw. sheet metal and generate a stretching said "with edge compensation effect".
  • the forming tool located between the two drawing heads needs to be adjusted in height, by means of adapted extensions, depending on the sheet that is wish to conform and draw characteristics to apply to it.
  • the present invention proposes a machine for forming sheet metal by longitudinal stretching, which machine comprises two drawing heads located on either side of a forming tool for the sheet, which drawing heads each comprise a jaw line secured to a support structure which is associated with drawing means and which is mounted on a frame by means of a tilting axis, at least one tilting cylinder being interposed between said frame and said support structure, to allow rotation of said support structure about said tilting axis, and said frame being carried by a support frame, this machine being characterized in that it comprises means interposed between said support frame and said frame, arranged to allow adjustment of the vertical positioning of said tilting axis.
  • Such adjustment means make it possible to adjust the height of the jaw lines on either side of the forming tool; we can thus dispense with the presence of the systems of extensions needed in the machines of the state of the technique and thus simplify the tooling structure.
  • the current adjustment problems of the forming tool are reported on the drawing heads, the corresponding settings being then easier to achieve.
  • These particular means also confer additional adjustment and implementation possibilities. In particular, they make it possible to adjust certain angles and heights during forming, thus making the operation more fluid and improving productivity. The versatility characteristics of the machine are further improved. And, for the machines concerned, it is also possible to implement an edge compensation on the sheet during the forming operation.
  • the frame is mounted on the support frame via a complementary tilt axis, parallel or substantially parallel to the tilting axis, at least one complementary tilt cylinder being interposed between said frame and said support frame to allow the rotational maneuver of said frame about said complementary tilt axis and thus allow adjustment of the vertical positioning of said tilt axis.
  • the tilting axis and the complementary tilting axis preferably extend horizontally or substantially horizontally.
  • said complementary tilt axis is advantageously located on the opposite side of the tilting axis with respect to the associated jaw line.
  • the frame is mounted on the support frame by means which allow it to move relative to said support frame parallel to itself along a vertical axis.
  • Said frame then advantageously consists of a vertical sliding carriage, mounted on vertical rails and operated by one or more cylinders.
  • the machine according to the invention may comprise control means adapted to manage the displacement of the tilt cylinder or jacks and means for adjusting the vertical positioning of the tilting axis, as a function of the spatial position. desired bit lines.
  • the invention also relates to a method of implementing a machine as defined above, consisting in managing the displacement of the tilt cylinder (s) and means for adjusting the vertical positioning of the tilting axis, depending the desired spatial position of the jaw lines.
  • the longitudinal stretching machine 1 according to a preferred embodiment of the invention, illustrated on the Figures 1 and 2 , comprises two stretching heads 2, 2 ', here identical, mounted facing one another on a support frame 3, on either side of a forming tool 4.
  • the forming tool 4 is positioned and fixed on extensions 3a which are themselves fixed on the frame 3 between the two drawing heads 2, 2 '; his active face is adapted according to the final shape of the sheet metal parts T that it is desired to obtain.
  • Each drawing head 2, 2 ' consists of a line of jaws 5 carried by mechanical means adapted to give it the desired spatial movements.
  • jaw lines 5 have the function of clamping the width edge of the worked sheet by a jaw grip. They are here each constituted of a juxtaposition of five to eleven jaws 6 (here in this case seven in number); and they are arranged in a plane perpendicular to the drawing direction (marked at 7 on the figure 2 ), or substantially perpendicular to this direction of stretching, to suitably perform their function.
  • Each jaw line 5 comprises means enabling it to be placed in a rectilinear, curved (concave or convex) configuration, or else in S.
  • the jaw line 5 of the two drawing heads 2, 2 ' is placed in horizontal straight position; but it can also be in other configurations, for example in a rectilinear position, inclined at an angle to the horizontal, in an S configuration, or in a convex curved position.
  • the configuration adopted is a function of the inclination and / or the curved shape that one wishes to print on the sheet, so that it can follow the profile of the edge of the tool 4 for the sake of precision of the part performed.
  • the jaw lines 5 are each integral with a support structure 8 subjected to the action of one or more drawing jacks 9.
  • This support structure 8 (with the jaw line 5 and the drawing jacks 9 associated) is mounted on a frame 10 via a tilting axis 11; and at least one tilt cylinder 12 is interposed between the frame 10 and the support structure 8, to allow the pivoting operation of this support structure 8 around the tilting axis 11.
  • two tilt cylinders 12 provide pivoting operation of the support structure 8 relative to the chassis 10.
  • the tilting axis 11 extends horizontally or approximately horizontally, perpendicularly to the direction of stretching 7.
  • the forming machine 1 comprises means which are interposed between the support frame 3 and the frame 10, arranged to allow adjustment of the vertical positioning of the tilting axis 11 (that is to say to allow adjustment of the height of the tilting axis 11 and thus the jaw line 5).
  • the frame 10 is mounted on the support frame 3 via a complementary tilt axis 13, and at least one complementary tilt cylinder 14 is interposed between said frame 10 and said support frame 3, arranged to provide the maneuver in rotation of said chassis 10 about said complementary tilt axis 13.
  • the complementary tilting axis 13 extends horizontally, parallel or substantially parallel to the tilting axis 11.
  • this complementary tilting axis 13 is situated on the opposite side of the tilting axis 11 with respect to the jaw line 5, here below the horizontal plane through which said tilting axis 11 passes.
  • two complementary tilt cylinders 14 provide pivoting operation of the frame 10 relative to the support frame 3.
  • each drawing head 2, 2 ' (with its frame 10, the complementary tilting axis 13 and the associated complementary tilting cylinders 14) is carried by a carriage-like frame portion 31, which is mounted on a mounting base portion 32 fixed.
  • the two carriages 31 have the possibility of moving in translation in the stretching direction 7 on the frame base portion 32, that is to say in a direction perpendicular to the tilting axis 11 and to the axis complementary tilting 13, this under the action of appropriate displacement means (eg cylinders, rack-and-pinion systems or screw-nut systems).
  • appropriate displacement means eg cylinders, rack-and-pinion systems or screw-nut systems.
  • the displacement of each mobile frame 31 is achieved by direct action by means of a jack one part of which is fixed on said movable frame 31 and the other on the frame base 32.
  • the stationary base portion 32 fixed is common to both movable frame parts 31 and it also serves as support for the forming tool 4 through the extensions 3a.
  • the drawing machine 1 comprises control means adapted to manage the displacement of the tilt cylinders 12, complementary tilt cylinders 14 and drawing cylinders 9, depending on the desired spatial position of the lines. of jaw 5, this simultaneously or successively.
  • the tilting axis 11 of the drawing heads 2 of the drawing machine 1 according to the invention can be used conventionally, by means of the tilt cylinders 12, to rotate the jaw line 5, by example on an angular sector has of the order of 30 °.
  • the stretching machine 1 may be adapted to rotate said jaw lines 5 between a negative angle b (for example of the order of 5 to 10 °) and a positive angle c (for example of the order of 5 to 30 °).
  • any other combined management of the tilting axis 11 and the complementary tilt axis 13 can be implemented.
  • the carrier frame of the support structure 8 is mounted on the support frame 3 by means which allow its displacement parallel to itself along a vertical axis.
  • These displacement means then advantageously consist of a chassis 10 'in the form of a carriage sliding vertically along slides 15 integral with the movable frame 31, and actuated by at least one hydraulic cylinder 14'.
  • a chassis 10 ' in the form of a carriage sliding vertically along slides 15 integral with the movable frame 31, and actuated by at least one hydraulic cylinder 14'.
  • two hydraulic cylinders 14 ' are placed on either side of the carriage 10'.
  • the cylinder (s) 14 ' can be placed at the bottom or at the top of the mobile frame 31.
  • the up / down function of the support frame 8 and therefore of the jaw line 5 is performed by acting directly on the tilting axis 11 placed on the sliding frame 10 '.
  • the height dimension x + ⁇ x of the jaw line 5 on the figure 9 is greater than the x rating on the figure 8 .
  • control means are adapted to manage the displacement of the tilt cylinders 12 and the carriage with vertical guidance, depending on the desired spatial position of the jaw lines 5, that simultaneously or successively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
EP17306795.0A 2016-12-19 2017-12-18 Machine de formage de tôle par étirage longitudinal et procédé de mise en oeuvre d'une telle machine Active EP3335813B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17306795T PL3335813T3 (pl) 2016-12-19 2017-12-18 Maszyna do formowania arkusza przez rozciąganie wzdłużne i sposób wykorzystujący taką maszynę

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1662713A FR3060425B1 (fr) 2016-12-19 2016-12-19 Machine de formage de tole par etirage longitudinal

Publications (2)

Publication Number Publication Date
EP3335813A1 EP3335813A1 (fr) 2018-06-20
EP3335813B1 true EP3335813B1 (fr) 2019-07-17

Family

ID=58737640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17306795.0A Active EP3335813B1 (fr) 2016-12-19 2017-12-18 Machine de formage de tôle par étirage longitudinal et procédé de mise en oeuvre d'une telle machine

Country Status (7)

Country Link
US (1) US10940519B2 (es)
EP (1) EP3335813B1 (es)
DK (1) DK3335813T3 (es)
ES (1) ES2755186T3 (es)
FR (1) FR3060425B1 (es)
PL (1) PL3335813T3 (es)
PT (1) PT3335813T (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900008889A1 (it) * 2019-06-13 2020-12-13 Danieli Off Mecc Macchina stiratrice per profilati estrusi

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299689A (en) * 1964-05-18 1967-01-24 Cyril Bath Co Method and apparatus for combined stretch forming and die drawing
US3302437A (en) * 1964-06-22 1967-02-07 Cyril Bath Co Tension control
US3314269A (en) * 1966-08-12 1967-04-18 Cyril Bath Co Prestretch fixture and combination thereof with drawing die press
US3459025A (en) * 1967-12-07 1969-08-05 Cyril Bath Co Stretching fixture with quadrilateral linkage control of stretch head movements
FR2038831A5 (es) * 1969-03-31 1971-01-08 Bretagne Atel Chantiers
US3595057A (en) * 1969-04-15 1971-07-27 Cyril Bath Co Stretcher for stretch forming sheet and plate stock
DE10042197B4 (de) * 2000-08-28 2005-04-07 Schuler Held Lasertechnik Gmbh & Co. Kg Laser-Streckzieh-Bearbeitungseinrichtung für Blechteile und Verfahren
FR2886178B1 (fr) * 2005-05-24 2010-05-07 Acb Procede de faconnage d'une tole a double galbe longitudinal et transversal, et presse d'etirage longitudinal pour la mise en oeuvre du procede
US8943869B2 (en) * 2009-10-09 2015-02-03 Jilin University Multiple clamp type stretching and forming machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2755186T3 (es) 2020-04-21
PL3335813T3 (pl) 2020-06-15
US10940519B2 (en) 2021-03-09
EP3335813A1 (fr) 2018-06-20
PT3335813T (pt) 2019-10-30
FR3060425B1 (fr) 2019-05-17
US20180169731A1 (en) 2018-06-21
FR3060425A1 (fr) 2018-06-22
DK3335813T3 (da) 2019-10-21

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