EP2780126B1 - Procédé et dispositif de fabrication de profils dotés d'une déformation variable selon la position et orientée en longueur - Google Patents

Procédé et dispositif de fabrication de profils dotés d'une déformation variable selon la position et orientée en longueur Download PDF

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Publication number
EP2780126B1
EP2780126B1 EP12787719.9A EP12787719A EP2780126B1 EP 2780126 B1 EP2780126 B1 EP 2780126B1 EP 12787719 A EP12787719 A EP 12787719A EP 2780126 B1 EP2780126 B1 EP 2780126B1
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EP
European Patent Office
Prior art keywords
profile
hollow
annular gap
blank
forming tool
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Application number
EP12787719.9A
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German (de)
English (en)
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EP2780126A1 (fr
Inventor
Martin Kibben
Oliver Mertens
Thomas Flehmig
Arnoldus Theodorus Van Der Heiden
Gijs J.J. Mulder
Rolf Bernhard de Jong
Mattijn G. de Graaf
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ThyssenKrupp Steel Europe AG
ThyssenKrupp Accessibility BV
Original Assignee
ThyssenKrupp Steel Europe AG
ThyssenKrupp Accessibility BV
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Priority to EP12787719.9A priority Critical patent/EP2780126B1/fr
Publication of EP2780126A1 publication Critical patent/EP2780126A1/fr
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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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die
    • 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
    • B21D15/00—Corrugating tubes
    • B21D15/02—Corrugating tubes longitudinally
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die
    • B21D7/085—Bending rods, profiles, or tubes by passing between rollers or through a curved die by passing through a curved die

Definitions

  • the invention relates to a method and an apparatus for producing profiles with at least one positionally variable, longitudinally oriented shaping of a profile blank.
  • profiles in particular curved hollow profiles are required, which have a positionally variable, in particular twisted, longitudinally oriented shape.
  • An A-pillar which for example additionally forms a roof frame, can have correspondingly variable position, in particular twisted, longitudinally oriented formations for providing the necessary strength and / or sealing surfaces.
  • profiles for chair guides of stairlifts which are often divided into individual segments connected locally in the stairwell and fixed by brackets on the wall or the stairs. Specific cross-sectional shapes of these profiles are intended to ensure that the guided chair and the forces introduced by it onto the hollow profile are absorbed and the chair is nevertheless always guided in a spatially aligned manner.
  • the bent profiles are subjected to a torsion, so that the required for a guide formation of the hollow profile always has the same orientation, for example, to a vertical wall.
  • Curved hollow sections are therefore usually one subjected to appropriate torsion to ensure the correct orientation of the molding.
  • the longitudinally oriented formations must therefore be variable in position, or twisted.
  • a torsion of a curved hollow profile does not allow large torsion values in ° / mm or changes in position of the formations to be achieved without an increasing warping of the cross sections of the hollow profile.
  • the introduction of a torsion is possible only in a relatively short, free length of the hollow profile, which must be between two restraints. As a result, the introduction of a twist in a relatively long hollow profile is particularly time-consuming, since only small sections of the hollow profile can be gradually twisted.
  • DE 3807002 C1 discloses a method and apparatus according to the preamble of claim 1 and 9, respectively.
  • the invention has the object, a method and an apparatus for producing profiles or hollow profiles, which have at least one variable position, longitudinally oriented shape to provide, with which or with which with as few steps and low apparativem Effort can be made according to a positionally variable formations exhibiting profile.
  • a variable-position formation can be introduced into a profile or hollow profile without the profile or hollow profile must be twisted.
  • a strong change in position of the molding for example, a strong twisting the formation of the profile or hollow profile is thus no longer dependent on the Tord michshunt the profile or hollow profile and can be introduced in one step.
  • the active rotation of the hollow profile relative to the forming tool and vice versa a very large variability in the position-variable formations can be achieved, which was not previously known.
  • hollow profiles can be produced whose formations first twist in a first direction of rotation and twist in the same hollow profile again in the opposite direction of rotation.
  • the method according to the invention can be improved by bending the deformed profile or hollow profile exiting the forming tool using a downstream bending mold with optional bending mandrel, so that the profiles or hollow profiles provided with a variable-position formation can be bent in one working step ,
  • the inner die of the forming tool may have a cross-sectional shape in the form that the inner cross-sectional shape of the hollow section blank or of the profile is provided at the annular gap entrance and on Annular gap output the inner shape of the hollow profile or profile with variable-shape shaping.
  • profile blanks of open profiles can be reshaped.
  • the outer die and / or the preferably hollow profile blank is actively rotated using appropriate means themselves, i. the outer die is actively rotated via a drive and / or the profile or hollow profile blank, for example using a profile feed unit.
  • the rotational movement need not be provided by the propulsion of the profile or hollow profile or by the relative profile feed, so that the forming forces are smaller.
  • the just described method or the device with a forming tool or annular gap tool which is used according to the first teaching of the invention for the production of profiles or hollow profiles with at least one variable-position formation, can additionally all the features of the method or the device for introducing position-variable, longitudinally oriented formations in a profile or hollow profile blank using a corresponding shaping tool, which is used together with a bending mold according to another aspect of the present invention for producing curved hollow profiles, which have at least one longitudinally oriented, variable-position formation, and contribute to solving this teaching of the present invention.
  • the device for producing preferably hollow profiles which have at least one longitudinally oriented, variable-position formation, for example, be arranged on a profile bending machine, since this can provide means for carrying out the relative movement and the relative rotation in a simple manner.
  • This according to a preferred embodiment of the inventive method combines the introduction of storable, longitudinally oriented formations in a hollow profile using an annular gap tool with the bending of the formed hollow profile using a bending mold and optionally a bending mandrel, preferably by the relative rotation by using at least one active agent for rotating the outer die of Annular gap tool around the axial axis of the hollow profile, the at least one variable position, longitudinally oriented formation is introduced into the hollow profile, without the hollow profile itself is subjected to a torsion.
  • the rotatably arranged bending mold ensures that, despite the position-variable shaping of the hollow profile, bending of the hollow profile can be achieved by a relative movement in the axial direction, that is to say a translational relative movement, of hollow profile and bending form.
  • the hollow profile blanks are preferably made of a steel.
  • other readily deformable metals such as aluminum, aluminum alloys, copper, copper alloys, etc. may be used.
  • the bending mold can be arranged freely rotating or, alternatively, be rotatable about its longitudinal axis, for example by means of a motor drivable. This can have an advantageous effect on the control possibility, for example, on complex bending geometries, in particular on three-dimensional bending geometries or support their generation.
  • a curved hollow profile which has longitudinally oriented and positionally variable formations, are produced.
  • hollow profile blanks and profile blanks of open profiles can be used.
  • hollow profile blanks are preferably used as tubes with a circular cross-section.
  • the use of hollow profile blanks with other cross-sectional shapes, such as elliptical and rectangular cross-sectional shape is conceivable.
  • annular gap width of both the annular gap tool and the annular gap, which are formed by the bending mold and the optional bending mandrel is greater than or equal to the wall thickness of the reshaped hollow section blank, ensures that the frictional forces for introducing the variable-position, longitudinally oriented formation and bending of the Hollow profiles do not get too big.
  • a game of a few tenths of a millimeter is provided here.
  • the inner die of the forming tool has a longitudinally constant cross-section, which corresponds to the inner cross-sectional shape of the hollow profile with at least one longitudinally oriented, variable-position formation.
  • the friction in the forming tool can be reduced to a minimum, without losing the precision in the forming of the hollow profile or profile blank.
  • the manufacturing cost of the inner die can be reduced.
  • the change of Circumference of the hollow profile blank a maximum of +/- 25%, preferably a maximum of +/- 15%. This ensures that the required compressive forces for pressing the profile through the annular gap assume no inadmissibly high values and no forming work must be done in sheet metal plane direction.
  • an advantageous embodiment can be provided by the fact that the hollow profile blank is not changed in its shape in an inlet region of the annular gap inlet and / or in an outlet region at the annular gap outlet during the relative movement. This ensures further stabilization and at the same time a calibration of the introduction of the position-variable, longitudinally oriented formations into the hollow profile blank.
  • the relative movement between the hollow profile blank and the annular gap tool and bending mold is carried out by advancing the hollow profile blank using a profile feed unit, the method can be carried out with axially fixed annular gap tool and bending mold or optionally fixed mandrel. As a result, the expenditure on equipment for carrying out the method according to the invention is reduced.
  • the hollow section blank is rotated during the profile feed, optionally using the profile feed unit, so that both the outer die of the annular die and the bending die can be additionally made stationary with respect to axial rotation.
  • the hollow section blank is rotated during profile feed, optionally using a profile feed unit, for manipulating a 3D bending geometry, and the annular gap tool is rotated to introduce the variable position, longitudinally oriented formations.
  • a bending can preferably be initiated by deflection of the bending mold relative to the center axis of the hollow profile blank in combination with a rotatably mounted or preferably actively driven bending mold.
  • the method can be further improved by retracting the inner die of the forming tool toward the annular slot entrance during the bending operation. In this way, the bending of the reshaped hollow profile can be facilitated by positioning a mandrel ball of a bending mandrel below the pressure point of the bending mold.
  • the hollow profile blank is guided by using a guide sleeve, which is axially adjustable, for example, and an inner dart during the relative movement of hollow profile blank and annular gap tool, so that a further increase in process reliability is achieved.
  • the inner die of the annular gap tool which is usually held via a mandrel tie rod, can be fastened to the mandrel shaft of the guide sleeve.
  • the outer die of the annular gap tool can be connected to the guide sleeve.
  • the annular gap inlet and the annular gap outlet also have inflow or outflow curves, which simplify the friction or also the threading of the hollow profile blank into the annular gap tool.
  • the dies used or the bending form or even the active surfaces of the dies or the bending mold and optionally of the bending mandrel for example. be made of hard metal, hardened steel, metal ceramics or similar metals. These lead to a reduced wear of the dies and bending forms used.
  • the introduction of the variable-position, longitudinally oriented formations in the hollow profile by a driven rotation of the outer die of the annular gap tool can be performed using a drive unit.
  • the inner die is preferably freely rotatably mounted on a mandrel tie rod, so that it can follow the rotation of the outer die.
  • the bending mold can be freely rotatably mounted to follow the formation, which has been introduced by the annular gap tool in the hollow profile blank.
  • the bending mold can be arranged freely rotating or, alternatively, be rotatable about its longitudinal axis, for example by means of a motor drivable.
  • this can have an advantageous effect on the control possibility, for example, on complex bending geometries, in particular on three-dimensional bending geometries or support their generation.
  • this can hold the reshaped hollow section blank via a frictional connection and / or a positive connection, preferably for relief, the optionally provided guide sleeve with the outer die of the annular gap tool, for example simultaneously and simultaneously rotates and, for example, axially adjustable.
  • lunettes can be arranged downstream of the profile feed unit in order to support the hollow profile blank, in particular if it projects significantly beyond the guide sleeve at the beginning of the forming process.
  • the Bending form and optionally the bending mandrel are freely adjustable in their angle to the axial axis of the hollow section blank.
  • the bending mandrel which is usually equipped with articulated segments, especially for small bending axes, can easily follow the set angle to the axial axis of the hollow profile blank.
  • simple and conventional bending mandrels can be used.
  • the hollow profile produced according to the invention is part of a vehicle body, an A-pillar with subsequent roof frame of a motor vehicle or a profile of a stairlift chair guide.
  • Corresponding hollow profiles, which can be used for any purpose are, in which storable, longitudinally oriented formations play a crucial role, can be easily produced by the method according to the invention and therefore are correspondingly inexpensive to produce.
  • the device according to the invention can be improved according to a first embodiment in that a bending mold with an optional bending mandrel is provided at the outlet of the forming tool. Curved profiles or hollow profiles with a longitudinally oriented, positionally variable shape can then also be produced with the device which is further configured according to the invention.
  • the device according to the invention it is possible to mold in one step in a hollow profile on the one hand a variable position, longitudinally oriented formation and at the same time to bend the hollow profile.
  • hollow profiles for example, as they are provided for motor vehicles in the A-pillar or can also be used for the realization of chair guides a stairlift, are produced.
  • open profiles or partially closed profiles can be produced with a longitudinally oriented shape using this embodiment of the device according to the invention.
  • means are provided which allow the inner die to be displaced relative to the outer die, it being possible to axially displace the inner die during forming in the direction of the gap entrance, around a mandrel ball of a bending mandrel below the outer pressure point of the bending die to be able to position. It has been shown that As a result, an improved accuracy can be achieved with higher process reliability during the forming.
  • the bending mold is arranged such that the angle between the axial axis of the bending mold and the axial axis of the annular gap tool for changing the radius of curvature of the profile or hollow profile before and / or during the forming is variably adjustable. This ensures that different radii of curvature can be realized in the profile or hollow profile to be produced.
  • a next embodiment of the device according to the invention ensures a particularly process-reliable and gentle forming process in that the annular gap of the annular gap tool is shaped such that during the introduction of the at least one formation in the hollow profile blank, the circumference of the hollow profile blank by a maximum of +/- 25 %, preferably by a maximum of +/- 15% changes.
  • the forces necessary for the deformation can be minimized in this way.
  • a simple positioning of the inner die of the annular gap tool is achieved in that a mandrel tie rod is provided.
  • the outer die of the annular gap tool is divided and can be opened.
  • the inner die of the annular gap tool has outer dimension, which is smaller or are equal to the inner dimensions of the hollow profile blank, on.
  • the inner mandrel shaft may be formed integrally with the inner die of the annular gap tool.
  • the inner mandrel shaft may be formed integrally with the inner die of the annular gap tool.
  • partially preformed hollow profile blanks can be used.
  • outer die undivided, inner and outer die, for example using a mandrel tie rod, to be separated in the axial direction so that the hollow profile blank can be positioned via the inner die to the starting position in front of the annular gap entrance before the outer die again on the inner die is pushed to form the annular gap tool.
  • an adapted to the hollow profile blank pressure or. Pull piece may be provided, which detects the hollow profile blank at one end of the end face and is able to push through the hollow profile blank through the annular gap tool and possibly also by the bending mold or pull through. This ensures that the hollow profile blank is completely brought into the changed cross-sectional shape with at least one variable position, longitudinally oriented formation.
  • a profile feed unit is provided with a profile feed carriage, so that the annular gap tool and / or the bending mold can be formed stationary at least in the axial direction.
  • the structure of the device according to the invention is simplified.
  • the bending mold can additionally be arranged in the axial direction, preferably movable via a drive.
  • the outer and the inner die are axially adjustable in combination with the mandrel shaft and the guide sleeve.
  • the profile shear unit can also be equipped with means for rotating the hollow profile blank, so that the relative axial rotation between the hollow profile blank and the annular gap tool for introducing the variable-position, longitudinally oriented formations in the hollow profile blank can be completely or partially provided by the profile feed unit.
  • the device according to the invention can be configured advantageously in that the outer die of the annular gap tool and / or the bending die have a drive for axial rotation. Via a driven rotation of the outer die, it is possible to introduce a positionally variable, longitudinally oriented shaping into the hollow profile blank via a greater lever effect.
  • the inner drop of the Ring gap tool can be freely rotatably mounted in this case, follow the rotation of the outer die without much effort.
  • a guide sleeve and a mandrel shaft for guiding the hollow profile blank are arranged in front of the annular gap tool, wherein optionally the inner die of the annular gap tool is freely rotatably mounted on the mandrel shaft.
  • the guide sleeve and the mandrel shank enable an improved guidance of the hollow profile blank and thus a higher process reliability during the forming.
  • the inner die can be easily attached to the mandrel shaft.
  • the inner die is preferably rotatably attached to the inner mandrel shaft. It is also preferred that the bending mandrel is rotatably mounted at the exit of the annular gap tool on the inner die, so that it can follow the rotation of the formations of the hollow profile in the case of a rotatable outer die.
  • lunettes can also provide support for the hollow profile blank, which are preferably arranged between the profile feed unit and the annular gap tool.
  • the active surfaces of the outer and inner die of the annular gap tool and optionally the active surfaces of the bending mold and / or optionally of the bending mandrel are made of e.g. hardened steel, carbide, cermet or similar metals to optimize the forming process and to minimize wear.
  • the device can be further configured in that the annular gap tool, the bending mold with optional bending mandrel, the means for carrying out the relative movement between the hollow profile blank and annular gap tool, the means for rotating the outer die of the annular gap tool and optionally a profile feed unit and a guide sleeve on a profile bending machine are.
  • Profile benders usually have recordings for profile feed units and bending forms. In this respect, profile bending machines can be equipped with little effort for carrying out the method according to the invention and for providing a device according to the invention.
  • the inner die between the mandrel shaft and mandrel balls of a preferably used mandrel is articulated introduced.
  • a drive adjusts the axial position of the inner die relative to the outer die via the mandrel connected to the mandrel shank of the mandrel to maintain the annular gap.
  • the mandrel balls are inevitably adjusted together with the inner die.
  • inner die and mandrel ball can be axially positioned independently of each other.
  • This configuration has the advantage that both the inner die for the annular gap and the mandrel balls for an optional position for the inner support in the area of the bending mold can be positioned independently of each other.
  • Fig. 1 and Fig. 2 show in each case different views of an embodiment of a forming tool in the form of an annular gap tool 1, which consists of an outer die 2 and an inner die 3. Both dies 2, 3 form an annular gap 4, which changes from the annular gap entrance 5 to the annular gap exit 6 in its cross-sectional shape from the cross-sectional shape of the hollow profile blank, in this case a circular cross-sectional shape, to the cross-sectional shape of the hollow profile with longitudinally oriented recess.
  • Fig. 1 is clearly seen in comparison to the initial cross-sectional shape changed cross-sectional shape of the annular gap 4.
  • the width of the annular gap 4 is greater than or equal to the wall thickness of the hollow profile blank to be formed.
  • annular gap tool 1 can therefore both according to the first Partial aspect of the present invention for the production of hollow profiles are used with variable position, longitudinally oriented formations as well as for the production of curved hollow sections with variable position, longitudinally oriented formations.
  • annular gap tool is much simpler structure and may have softer shape transitions, so that a transformation of a hollow section blank can be made to a hollow profile with variable position, longitudinally oriented formations in a simple manner and without large forming forces.
  • the slope of the longitudinally oriented, variable-position formation ("Turns") over the time-varying rotation of the outer die to actively control.
  • the circumference of the hollow profile blank does not change. It follows that the length of the neutral fiber, i. the center line of the sheet thickness of the hollow section blank does not change at all or only within narrow limits preferably +/- 25% or more preferably +/- 15%. The forming work taking place in the sheet metal plane is thereby minimized, so that the forming forces can be further reduced.
  • Fig. 3 shows in a schematic sectional view of the starting cross-sectional shape 7 of the hollow profile blank and the cross-sectional shape 8 of the hollow profile blank after leaving the annular gap tool.
  • the circumferential length of the two cross-sectional shapes 7, 8 is identical, so that no work in the sheet thickness plane through the annular gap tool must be made.
  • FIG. 4 now shows one opposite the Fig. 1 and 2 further improved variant of the annular gap tool 1 with upstream guide sleeve 9 and inner mandrel shaft 10 in an axial sectional view.
  • the annular gap tool 1 at the annular gap input 5 and at the annular gap output 6 input and output areas 5a, 6a, which no change in shape in the hollow section blank, which in Fig. 4 also not shown, cause.
  • the hollow section blank, in Fig. 4 not shown between the mandrel shaft 10 and guide sleeve 9 is guided, the forming process and the introduction of variable position, longitudinally oriented formations in the hollow section blank are made even more process-reliable.
  • Guide sleeve 9 shown here preferably rotates with to additionally support the introduction of the variable-position, longitudinally oriented formations through the annular gap tool.
  • Either the guide sleeve 9 is freely rotatably mounted or can be actively rotated by means of a drive or alternatively be executed by means of a braking device fixed or controlled rotating.
  • the guide sleeve 9 may also be formed non-rotatable.
  • the width of the annular gap 13 is also greater than or equal to the wall thickness of the hollow section blank.
  • the bending mold 11 with its axial axis at an angle to the axial axis of the annular gap tool 1 and the guide sleeve 9 occupy.
  • the deformed hollow profile emerging from the annular gap tool 1 is bent over the bending mold.
  • the bending mold 11 follows as well as the bending mandrel 12 of the introduced, variable-position formations of the hollow profile. It is also conceivable to actively drive the bending mold.
  • any radii of curvature can be generated in the longitudinal direction of the hollow profile to be produced, despite the positionally variable, longitudinally oriented formations of the hollow profile.
  • Fig. 6 shows a schematic sectional view of a further embodiment of a device according to the invention with an annular gap tool 1, a bending mold 11, a bending mandrel 12 and means 14 for performing a relative movement in the axial direction between the annular gap of the annular gap tool 1, the annular gap 13, which through the bending mold 11 and the Bending mandrel 12 is formed and the hollow profile blank 16.
  • the means 15 for performing a relative movement in the axial direction of the hollow profile blank 16 are provided by a profile feed unit 15 in the illustrated embodiment.
  • the profile feed unit 15 can perform a translational movement in order to keep the hollow profile blank 16 as continuous as possible relative to and to move through the annular gap tool 1 or lead.
  • the deformed hollow section blank 16 is moved further in the direction of the bending mold 11 and the bending mandrel 12 and bent with introduced, variable position, longitudinally oriented formation.
  • the bending mold 11 is preferably arranged so that any angle ⁇ can be adjusted relative to the axial axis of the annular gap tool 1 and the hollow profile blank before bending.
  • the angle ⁇ can be adjusted in any direction perpendicular to the axial axis of the annular gap tool.
  • the bending mold 11 rotates synchronously with the annular gap tool 1 so that the bending mold 11 can each follow the formations introduced into the hollow profile.
  • the bending mandrel 12 is segmented. The individual segments are preferably connected to one another like an articulation, so that the latter can follow the bending angles which the bending form 11 assumes with respect to the axial axis of the annular gap tool.
  • the bending mandrel 12 is preferably rotatably attached to the inner tool 3 of the annular gap tool 1.
  • the means for performing a relative rotation about the axial axis of the annular gap tool, the bending shape relative to the hollow profile blank are in Fig. 6 represented schematically by the reference numerals 17 and 18.
  • a specifically designed pressure part 15a is indicated, which allows the hollow profile blank 16 can be completely transformed in its cross-sectional shape.
  • the device just described is arranged on a profile bending machine 19, Fig. 6 .
  • Profile bending machines 19 usually already have means for setting a bending angle and for carrying out translational movements, for example a profile feed unit 15.
  • Profile bending machines 19 can therefore be equipped in a simple manner with the device according to the invention.
  • Fig. 6 Lunettes 20 which support the hollow profile blank 16 from the outside.
  • Other suitable proppant can be used. If the profile feed unit 15 moves in the direction of the annular gap tool 1, it presses the hollow profile blank 16 through the annular gap of the annular gap tool 1. Through the annular gap 4 of the annular gap tool 1 of the hollow section blank 16 is formed. If the outer die of the annular gap tool 1 rotates while the profile feed unit 15 moves the hollow profile blank 16 relative to the position of the annular gap tool 1, a positionally variable, longitudinally oriented formation 23 is introduced into the hollow profile blank 16.
  • the at least one formation exhibits hollow profile 21 and runs directly into the bending mold 11, which likewise follows the rotation of the annular gap tool via the means 17.
  • the bending mold 11 bends the incoming hollow section 21 according to the set bending angle ⁇ to a bent hollow profile 22, which has positionally variable, in particular longitudinally oriented formations 23.
  • Fig. 7 represented according to an embodiment.
  • Fig. 7a a guide sleeve 9
  • the annular gap tool 1 and the bending mold 11 together with bending mandrel 12 shown in perspective.
  • the introduced from the left side into the guide sleeve hollow section blank 16 has, as shown in the present embodiment, a circular output cross-section.
  • Fig. 7b the hollow profile blank 16 as far as through the guide sleeve 9, the annular gap tool 1 and the bending mold 11 is moved so that it emerges on the bending mold 11 with the introduced formations 23 as a deformed hollow section 22.
  • the relative rotation of the annular gap tool ⁇ relative to the hollow profile blank is to be defined as a function of the profile advance and thus of the time to achieve almost any positional changes of the formations.
  • ⁇ f z t . with z (t): profile feed in the axial direction.
  • the relative rotation of the outer die can be controlled to obtain the desired course of the formations in the hollow profile.
  • a curved hollow profile with variable position, longitudinally oriented recesses 23 shows Fig. 8 in a schematic, perspective view.
  • curved hollow profile with longitudinally oriented formations 23 may, for example, as a profile for chair guidance of a stair lift 24, as it is for example in Fig. 9 is shown used.
  • Another use of the hollow section 22 shows Fig. 10 schematically in a side view of a vehicle body.
  • the A-pillar 25, which also forms part of the roof frame, usually also has variable-position, longitudinally oriented formations, on the one hand to meet the stability requirements of an A-pillar and the stability requirements of the roof frame.
  • the use of a single hollow section 25 for an A-pillar including roof frame part simplifies the production of vehicle bodies.
  • FIG. 11 shows a further embodiment of a forming tool in a perspective view, which consists of an outer die 2 and an inner die 3, wherein the outer die 2 at the annular gap outlet 6 has the outer cross-sectional shape of the hollow profile to be produced including the formations.
  • the outer die has the cross-sectional shape of the profile or hollow profile blank, in the present case a circular cross-section.
  • the inner die 3 has a longitudinally constant cross-section, which corresponds to the inner cross-sectional shape of the deformed profile or hollow profile.
  • a large inlet region is formed in regions.
  • the friction can be significantly reduced if the shaping characteristic of the forming tool continues to be given, so that, for example, lower feed forces are required for the forming.
  • the process reliability of the forming process can be improved because wrinkling of the profile or hollow profile blank is counteracted by the reduced feed forces.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (15)

  1. Procédé de fabrication de profilés (22) avec au moins un façonnage (23) orienté longitudinalement, à position variable à partir d'une ébauche de profilé (16) comprenant les étapes de procédé suivantes :
    - fourniture d'un outil de façonnage (1, 2, 3), qui présente à l'entrée la forme de section transversale d'une ébauche de profilé ou d'une ébauche de profilé creux (16) et à la sortie une forme de section transversale modifiée avec au moins un façonnage,
    - positionnement de l'ébauche de profilé ou l'ébauche de profilé creux (16) à l'entrée de l'outil de façonnage,
    caractérisé en ce que l'étape suivante est effectuée:
    - exécution d'un mouvement relatif dans la direction axiale entre l'outil de façonnage (1, 2, 3) et l'ébauche de profilé ou de profilé creux (16) tout en effectuant simultanément une rotation relative entre l'outil de façonnage (1, 2, 3) et l'ébauche de profilé ou de profilé creux (16) autour d'un axe axial de l'outil de façonnage (1, 2, 3) du profilé ou du profilé creux en utilisant au moins un moyen actif pour effectuer la rotation de l'outil de façonnage (1, 2, 3) et/ou l'ébauche de profilé creux (16), afin d'introduire un façonnage à position variable par l'intermédiaire de l'outil de façonnage (1, 2, 3) dans l'ébauche de profilé ou de profilé creux (16).
  2. Procédé selon la revendication 1,
    caractérisé en ce que sur l'outil de façonnage (1, 2, 3) le profilé ou le profilé creux façonné sortant est cintré en utilisant une matrice de cintrage (11) disposé en aval, optionnellement avec un mandrin de cintrage (12).
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce qu'il comprend les étapes de procédé suivantes :
    - fourniture d'un outil de façonnage conçu comme un outil à passage annulaire (1) comportant une matrice (2,3) extérieure et intérieure, qui forment un passage annulaire (4), une entrée du passage annulaire (5) et une sortie du passage annulaire (6), dans lequel à l'entrée du passage annulaire au moins la matrice extérieure (2) présente la forme de section transversale de l'ébauche de profilé creux et le passage annulaire (4) à la sortie du passage annulaire (6) présente la forme de section transversale du profilé creux (22) avec au moins un façonnage (23) orienté longitudinalement, à position variable, dans lequel la largeur du passage annulaire (4) est plus grande ou égale à l'épaisseur de paroi de l'ébauche de profilé creux (16),
    - fourniture d'une matrice de cintrage (11) et optionnellement d'un mandrin de cintrage (12), qui sont disposés en aval de l'outil à passage annulaire (1) et forment un passage annulaire (13) pour cintrer l'ébauche de profilé creux façonnée dans l'outil à passage annulaire (1), dans lequel la largeur du passage annulaire (13) est plus grande ou égale à l'épaisseur de paroi de l'ébauche de profilé creux (16),
    - positionnement de l'ébauche de profilé creux (16) à l'entrée du passage annulaire (5),
    - exécution d'un mouvement relatif dans la direction axiale entre le passage annulaire (4) de l'outil à passage annulaire (1), le passage annulaire (13), qui est fournie par la matrice de cintrage (11) et optionnellement le mandrin de cintrage (12), et l'ébauche de profilé creux (16) lors d'un mouvement de rotation relatif simultané de la matrice extérieure (2) de l'outil à passage annulaire par rapport à l'ébauche de profilé creux (16) en utilisant au moins un moyen actif pour exécuter la rotation axiale de la matrice extérieure (2) et/ou l'ébauche de profilé creux (16),
    - cintrage du profilé creux (22) façonné, sortant à la sortie du passage annulaire (6) en utilisant la matrice de cintrage (11) et optionnellement le mandrin de cintrage (12), qui suivent par un mouvement axial relatif pendant le processus de cintrage la position d'au moins un façonnage (23) dans l'ébauche de profilé creux (16) façonnée.
  4. Procédé selon la revendication 3,
    caractérisé en ce que la matrice intérieure (3) de l'outil de façonnage présente une section transversale à longueur constante, qui correspond à la forme de section transversale intérieure du profilé creux avec au moins un façonnage orienté longitudinalement, à position variable.
  5. Procédé selon la revendication 3,
    caractérisé en ce que l'ébauche de profilé creux (16) dans une zone d'entrée (5a) de l'entrée du passage annulaire (5) et/ou dans une zone de sortie (6a) à la sortie du passage annulaire (6) n'est pas modifiée dans sa forme pendant le mouvement relatif.
  6. Procédé selon la revendication 1 à 5,
    caractérisé en ce que le mouvement relatif entre l'ébauche de profilé creux (16) et l'outil de façonnage (1) et la matrice de cintrage (11) est exécuté en avançant l'ébauche de profilé ou de profilé creux (16) en utilisant une unité d'avance de profilé (15).
  7. Procédé selon une des revendications 1 à 6,
    caractérisé en ce que l'ébauche de profilé ou de profilé creux (16) est guidée en utilisant un manchon de guidage (9) et une tige de mandrin intérieure (10) pendant le mouvement relatif de l'ébauche de profilé ou de profilé creux (16) et l'outil de façonnage (1).
  8. Procédé selon une des revendications 1 à 7,
    caractérisé en ce que le profilé ou le profilé creux fabriqué est une partie d'une carrosserie de véhicule, un pilier A (25) avec cadre de toit rattaché d'un véhicule automobile ou un profilé ou profilé creux d'une glissière de chaise pour monte-escalier (24).
  9. Dispositif de fabrication de profilés ou de profilés creux (22), comportant au moins un façonnage orienté longitudinalement, à position variable à partir d'une ébauche de profilé ou de profilé creux (16), en particulier pour mettre en oeuvre un procédé selon une des revendications 1 à 8 comprenant:
    - un outil de façonnage (1, 2, 3), qui présente à l'entrée la forme de section transversale de l'ébauche de profilé ou de profilé creux (16) et à la sortie la forme de section transversale du profilé ou profilé creux avec au moins un façonnage orienté longitudinalement ;
    - un moyen d'exécution d'un mouvement relatif dans la direction axiale entre l'outil de façonnage (1, 2, 3) et l'ébauche de profilé ou de profilé creux (16), de préférence une unité d'avance de profilé, caractérisé en ce que le dispositif comprend
    - un moyen d'exécution d'une rotation relative entre l'outil de façonnage (1, 2, 3) et l'ébauche de profilé ou profilé creux (16) autour d'un axe axial de l'outil de façonnage (1, 2, 3) du profilé ou du profilé creux, avec lequel l'ébauche de profilé creux (16) et/ou l'outil de façonnage (1, 2, 3) sont rotatifs activement l'un par rapport à l'autre.
  10. Dispositif selon la revendication 9,
    caractérisé en ce que à la sortie de l'outil de façonnage une matrice de cintrage (11) optionnellement avec un mandrin de cintrage (12) est prévu.
  11. Dispositif selon la revendication 9 ou 10,
    caractérisé en ce que le dispositif comprend :
    - un outil de façonnage réalisé comme un outil à passage annulaire (1), comportant une matrice (2, 3) extérieure et intérieure, qui forment un passage annulaire (4), une entrée du passage annulaire (5) et une sortie du passage annulaire (6), dans lequel à l'entrée du passage annulaire au moins la matrice extérieure (2) présente la forme de section transversale de l'ébauche de profilé creux et le passage annulaire (4) à la sortie du passage annulaire (6) présente la forme de section transversale du profilé creux (22) avec au moins un façonnage (23) orienté longitudinalement, à position variable, dans lequel la largeur du passage annulaire (4) est plus grande ou égale à l'épaisseur de paroi de l'ébauche de profilé creux (16),
    - une matrice de cintrage (11) et optionnellement un mandrin de cintrage (12), qui sont disposés en aval de la sortie du passage annulaire (6) de l'outil à passage annulaire (1), dans lequel la matrice de cintrage (11) et optionnellement le mandrin de cintrage (12) forment un passage annulaire (13) et sont disposés de telle sorte qu'un cintrage de l'ébauche de profilé creux (16) façonnée par l'intermédiaire de l'outil à passage annulaire (1) ait lieu,
    - un moyen (15) d'exécution d'un mouvement relatif dans la direction axiale de l'outil à passage annulaire (1) entre la filière (4) de l'outil à passage annulaire (1), le passage annulaire (13), qui est formée par la matrice de cintrage (11) et optionnellement le mandrin de cintrage (12), autour de l'ébauche de profilé creux (16),
    - un moyen (17, 18) d'exécution active d'une rotation relative de l'outil à passage annulaire (1) et du mandrin de cintrage (11) autour de l'axe axial par rapport à l'ébauche de profilé creux (16).
  12. Dispositif selon une des revendications 10 ou 11, caractérisé en ce que la matrice de cintrage (11) est disposée de telle sorte que l'angle (α) entre l'axe axial de la matrice de cintrage (11) et l'axe axial de l'outil de façonnage (1) est réglable variablement afin de modifier le rayon de courbure du profilé ou du profilé creux avant, après et/ou pendant le façonnage.
  13. Dispositif selon une des revendications 9 à 12, caractérisé en ce que la matrice extérieure (2) de l'outil à passage annulaire (1) et/ou la matrice de cintrage (11) présentent un entraînement à des fins de rotation axiale.
  14. Dispositif selon une des revendications 9 à 13, caractérisé en ce que un manchon de guidage (9) et une tige de mandrin (10) pour guider l'ébauche de profilé creux (16) sont disposés avant l'outil de façonnage (1, 2, 3), dans lequel optionnellement la matrice intérieure (3) de l'outil à passage annulaire (1) est fixée de manière librement rotative sur la tige de mandrin (10).
  15. Dispositif selon une des revendications 9 à 14, caractérisé en ce que l'outil de façonnage (1, 2, 3), la matrice de cintrage (11) avec le mandrin de cintrage optionnel (12), les moyens (15) d'exécution du mouvement relatif entre l'ébauche de profilé et de profilé creux (16) et l'outil de façonnage (1, 2, 3), les moyens (18) de rotation de l'outil de façonnage et optionnellement une unité d'avance de profilé (15) ainsi que un manchon de guidage (9) sont disposés sur une machine de cintrage de profilé (19).
EP12787719.9A 2011-11-15 2012-11-15 Procédé et dispositif de fabrication de profils dotés d'une déformation variable selon la position et orientée en longueur Active EP2780126B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12787719.9A EP2780126B1 (fr) 2011-11-15 2012-11-15 Procédé et dispositif de fabrication de profils dotés d'une déformation variable selon la position et orientée en longueur

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11189248.5A EP2594346A1 (fr) 2011-11-15 2011-11-15 Procédé et dispositif de fabrication de profils dotés d'une déformation à position variable et orientée en longueur
PCT/EP2012/072728 WO2013072414A1 (fr) 2011-11-15 2012-11-15 Procédé et dispositif destinés à la fabrication de profilés présentant une protubérance qui s'étend en longueur et dont la position est variable
EP12787719.9A EP2780126B1 (fr) 2011-11-15 2012-11-15 Procédé et dispositif de fabrication de profils dotés d'une déformation variable selon la position et orientée en longueur

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EP2780126B1 true EP2780126B1 (fr) 2016-04-13

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DE4428827A1 (de) * 1994-08-17 1996-03-14 Kleiner Matthias Prof Dr Ing H Verfahren zur Herstellung von gekrümmten Werkstücken durch eine Kombination von Strangpressen und Biegen
DE102005013750B3 (de) * 2005-03-22 2006-11-30 Mewag Maschinenfabrik Ag Vorrichtung zum Freiformbiegen von Längsprofilen, insbesondere Rohre, sowie kombinierte Vorrichtung zum Freiformbiegen und Ziehbiegen von Längsprofilen, insbesondere Rohren
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WO2013072414A1 (fr) 2013-05-23
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EP2594346A1 (fr) 2013-05-22

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