[go: up one dir, main page]

EP2180964B1 - Procédé pour déformer un élément creux - Google Patents

Procédé pour déformer un élément creux Download PDF

Info

Publication number
EP2180964B1
EP2180964B1 EP08806905.9A EP08806905A EP2180964B1 EP 2180964 B1 EP2180964 B1 EP 2180964B1 EP 08806905 A EP08806905 A EP 08806905A EP 2180964 B1 EP2180964 B1 EP 2180964B1
Authority
EP
European Patent Office
Prior art keywords
matrix
hollow part
die
segments
during
Prior art date
Legal status (The legal status 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 status listed.)
Not-in-force
Application number
EP08806905.9A
Other languages
German (de)
English (en)
Other versions
EP2180964A2 (fr
Inventor
Eberhard Rauschnabel
Bernhard Adams
Karsten Juhr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ifutec Ingenieurbuero fur Umformtechnik GmbH
Stiftung Fachhochschule Osnabrueck
Original Assignee
Ifutec Ingenieurbuero fur Umformtechnik GmbH
Stiftung Fachhochschule Osnabrueck
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 Ifutec Ingenieurbuero fur Umformtechnik GmbH, Stiftung Fachhochschule Osnabrueck filed Critical Ifutec Ingenieurbuero fur Umformtechnik GmbH
Priority to EP08806905.9A priority Critical patent/EP2180964B1/fr
Publication of EP2180964A2 publication Critical patent/EP2180964A2/fr
Application granted granted Critical
Publication of EP2180964B1 publication Critical patent/EP2180964B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K23/00—Making other articles
    • B21K23/04—Making other articles flanged articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes or tubes with decorated walls
    • B21C37/205—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes or tubes with decorated walls with annular guides
    • 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
    • B21D17/025—Forming single grooves in sheet metal or tubular or hollow articles by pressing by pressing tubes axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting

Definitions

  • the present invention relates to a method for forming a hollow molded part, in which in a first process step, a hollow molded part is inserted into a first die which annularly surrounds and supports the hollow molded part in a support region along its lateral surface, and in which in a second process step, the hollow molded part in Direction of its major axis is compressed such that the hollow molded part is plastically deformed in a not supported by the first die forming area.
  • the method according to the invention belongs to a category of methods in which, for example, according to the EP 1 611 973 A1 a multi-part die is provided for supporting the outside of a hollow molded part on which a flange is to be formed by means of plastic deformation.
  • the die is divided in the axial direction into two die parts, which are adjustable relative to each other during a plastic forming operation.
  • the reshaped hollow molded part is subjected to a Axialpressvorgang, which brings the basic problem of buckling with it, so that only comparatively thin flanges can be produced on the hollow molded part.
  • a method for locally expanding a hollow molded part in which a forming force is applied by means of a hydraulically active medium by high-pressure forming on the hollow molded part.
  • the hollow molded part In a non-reshaping region, the hollow molded part is firmly supported on the outside by means of a first die, while a multi-part, adjustable second die is provided in a forming region not described in detail.
  • the second die includes four segments positioned around the die, each having a spherical inner surface. The segments are controlled away via hydraulic piston-cylinder units so moved radially, that they rest against the hollow mold part, but cause a support of set to the yield point under internal pressure material of the hollow molded part.
  • the method according to the invention belongs to the category of transverse extrusion processes, by means of which wide, flange-like thickenings of hollow moldings can be produced.
  • a typical effect is that when axial compression of a hollow molded part, in particular a tubular element, the material largely moves outward.
  • the result for wider thickening or higher degrees of deformation is the problem that the wall of the hollow molded part bulges outward, wherein optionally results in an inner fold inside the hollow molded part.
  • Such a configuration causes a weakening of the (dynamic) strength of the hollow molded part, which is generally unacceptable and can not be easily compensated by increasing the wall thickness of the hollow molded part.
  • the object of the invention is therefore to provide a method, can be produced by plastic deformation of a hollow molded resilient as possible with the flanges.
  • the object of the invention is also to provide a method of the type mentioned in which to produce a hollow shaped part in a particularly simple manner by cross extrusion a load-bearing wall thickening without an inner fold.
  • An inventive forming tool for forming a particular metallic hollow molded part 1 with preferably circular cylindrical lateral surface comprises in a first embodiment according to the Fig. 1 and 2 a first die 2a, 2b, wherein the die 2a, 2b is divided transversely to a main axis 4 of the tool so as to give two independent die parts 2a, 2b.
  • the die parts 2a, 2b are in turn again divided in each case in the axial direction.
  • the die thus comprises, in particular, a first annular die part 2a and a second annular die part 2b, into which the hollow shaped part 1 is preferably inserted accurately and which are initially positioned at a distance from one another. Between the die parts a forming area U is formed which is not supported by the die parts 2a, 2b.
  • a second die 3 which is adjustable in its geometry and / or changeable is arranged, which preferably surrounds the hollow shaped part 1 in the forming region U initially with a certain distance.
  • the second Matrix 3 is subdivided into four segments 3a, 3b, 3c, 3d in the direction of one or more planes parallel to the main axis 4 of the hollow molded part 1 and / or in the direction of one or more planes E1, E2 containing the main axis 4 of the hollow molded part (cf. Fig. 2 ).
  • the segments are movable in a manner not shown on one or more carriers, in particular resiliently and / or adjustably mounted.
  • the segments together form a multi-part circular cylindrical ring.
  • at least one segment has a geometry deviating on the inside from the circular cylindrical shape.
  • the second die 3 is designed as elastically deformable, closed, the hollow mold part 1 enclosing ring, in particular as a spring band or as a hydraulic pressure hose.
  • the hollow molded part 1 is inserted into the die parts 2a, 2b.
  • Die 2a, 2b and mold part 1 are positioned such that the first die 2a, 2b, the hollow mold part 1 in a support region S along its lateral surface 1 'annular surrounds and supports (see. Fig. 1 ).
  • the hollow molded part can be supported via a mandrel, not shown.
  • the hollow mold part 1 in an upstream process step above room temperature (theoretically close to the solidus temperature of the material) are heated and subjected to the subsequent process steps in a warm state.
  • a second process step the hollow mold part 1 is compressed by means of a pressing device, not shown in the direction of its major axis 4 such that the hollow mold part 1 is plastically deformed in the non-supported by the first die 2a forming area U, wherein the hollow molded part in the forming area U is supported by the second die 3 on the outside at least after a certain forming movement.
  • material of the hollow molded part 1 can flow in the radial direction to the outside and / or to the inside, wherein the flow of material by means of the second die 3 and possibly by means of a dome is controllable.
  • the said forming movement is terminated in particular when the material of the hollow molded part has completely filled the space provided within the dies 2, 3 and optionally around the mandrel.
  • the second die 3 is moved in a direction transverse to the main axis of the hollow shaped part 1 (arrow 5); In particular, it is opened continuously and / or gradually in the radial direction.
  • the latter is in Fig. 1 by dashed lines and in Fig. 2 shown schematically by arrows 7.
  • a continuous and / or stepwise opening movement of the second die 3 can be superimposed on an oscillating movement of individual segments 3a, 3b, 3c, 3d of the second die.
  • the second die 3 is pressed against the hollow mold part 1 during the forming process or during a temporal part of the forming process with a predetermined force and / or a predetermined force curve.
  • the second die 3 is preferably moved in the radial direction during the forming process or a part of the forming process along a predetermined path and / or with a predetermined course of speed.
  • the second die 3 and / or the hollow molded part 1 and / or individual segments are rotated during the forming step about the main axis 4 of the hollow molded part; This is preferably done in a completely circular cylindrical and rotationally symmetrical workpiece design.
  • individual die parts can additionally be rotated about one (or several different) parallel to the main axis 4, but spaced from this axis (s). This makes it possible to achieve particularly small radial gaps between the segments in each working position.
  • first die part 2a and the second die part 2b of the first die 2 are moved toward one another in the direction of the arrows 6 during the forming process, thereby assisting a material flow to the outside.
  • first die part 2a and the second die part 2b of the first die 2 are moved apart in the opposite direction to the arrows 6 during the forming process, so that a material flow in the axial direction is made possible.
  • a (possibly oscillating) axial movement of the die parts and / or the hollow molded part 1 can be superimposed on a continuous movement of the first die part 2a and the second die part 2b.
  • the radial and / or axial movement of the die parts a (possibly oscillating) rotational movement or a movement in the circumferential direction superimposed.
  • a second embodiment according to the Fig. 3 and Fig. 4a, 4b corresponds essentially to that according to the Fig. 1 and 2 Therefore, reference can be made to the above description in its entirety and equivalent components are provided with the same reference numerals.
  • the forming tool comprises in the second embodiment, in turn, a first die 2a, 2b, which in turn a first annular die part 2a and a second annular die part 2b, in which the hollow mold part 1 is inserted.
  • a forming area U is formed which is not supported by the die parts 2a, 2b.
  • a second die 3 adjustable in its geometry is arranged, which surrounds the hollow shaped part 1 in the forming area U.
  • the second die 3 is subdivided in the direction of three planes E1, E2, E3 containing the main axis 4 of the hollow shaped part 1 into six segments 3a-3f (cf. Fig. 4a, 4b ).
  • the segments are resiliently supported by mechanical coil springs 10 on a support 9.
  • the segments 3a - 3f together form a multi-part approximately circular cylindrical ring, which in a first working position according to Fig. 4a the hollow mold part 1 completely, that encompasses without significant gaps.
  • the hollow molded part 1 is supported on the inside during a forming step or during a plurality of forming steps by a third die in the form of a cylindrical mandrel 8a, 8b engaging in the hollow shaped part.
  • the hollow molded part is subjected to a Axialpressvorgang in a forming step.
  • the hollow molded part 1 is compressed by means of a pressing device 11 in the direction of its main axis 4 such that the hollow molded part 1 is plastically deformed in the Umform Stud U not supported by the first die 2a, wherein the hollow molded part in the forming area U of the second die 3 on the outside with a force defined by the springs 10 is supported.
  • material of the hollow molded part 1 can flow in the radial direction to the outside, wherein the material flow by means of the second die 3 is preset controllable.
  • approximately 10% to 30% of the yield stress of the material of the hollow molded part is set as surface loads between the segments and the hollow molded part.
  • the spring characteristics can be chosen to be linear, but also progressive or degressive.
  • the segments 3a-3f of the second die 3 are moved in different directions transversely to the main axis of the hollow molded part 1 (arrows 5).
  • Each segment is assigned a separate movement path in the radial direction, the straight lines of the movement paths intersecting one another at a point M on the main axis 4.
  • the die 3 can in turn be opened continuously, stepwise or oscillating in the radial direction.
  • Fig. 4b a second working position of the segments 3a - 3f is shown, which is preferably taken after a (first) forming step and in which the second die is at least approximately opened.
  • an adjustable and / or elastically deformable mandrel 8a, 8b can be provided.
  • inner collars can be produced in an analogous manner or inner recesses can be produced.
  • Fig. 6a and 6b Possible results of the forming process according to the invention are the Fig. 6a and 6b refer to.
  • a formation of an inner fold is avoided so that dynamic loadable hollow parts (eg gear shafts for gearboxes and the like) with a small wall thickness and a wide flange can be produced from the formed hollow shaped part.
  • a machining operation is provided in a method following the described forming steps.
  • a possible end product in the form of a gear shaft is schematically shown in FIG Fig. 7 shown. Out Fig. 7 it can be seen that an (axial) width d of the flange is greater than three times the initial wall thickness t of the hollow molded part.
  • Fig. 5a and 5b is a third embodiment of a forming tool according to the invention shown in two different working positions.
  • the structure of the forming tool corresponds in principle to the previously described embodiments, so that in turn the same reference numerals are used for equivalent components and, moreover, to a possible embodiment of the apparatus and the forming method can be fully incorporated by reference to the previous embodiments.
  • the forming tool in the third embodiment in turn comprises a first die into which the hollow molded part 1 is inserted. Within the first die, a forming area is formed, which is not supported by the first die. In this forming area, in turn, a second die 3 adjustable in its geometry is arranged, which surrounds the hollow shaped part 1 in the forming area U.
  • the second die 3 comprises four segments 3a-3d, which are mounted linearly displaceably within a guide device 12 in the radial direction and are coupled to a gear 13.
  • the segments 3a-3d together with the guide means form a multi-part ring which, in a first working position according to FIG Fig. 5a surrounds the hollow molded part 1.
  • the thickness of the segments in the pressing direction preferably corresponds substantially to the width of the flange to be produced.
  • the segments 3a-3d adapt on the inner side in each case to the hollow molded part 1 by a concave cylindrical surface, wherein the radius of the concave cylindrical surfaces preferably corresponds to the outside radius of the finished molded hollow molded part.
  • the segments 3a-3d have lateral extensions in the region of their inner, concave cylindrical surfaces.
  • each lateral extension is preferably embodied in each case in one piece with the associated segment and preferably extend in the direction of at least one adjacent segment.
  • each lateral extension engages between the inner, concave cylindrical surface of the adjacent segment and the outer surface of the hollow molded part.
  • the hollow molded part 1 is preferably supported on the inside during a forming step by a third die in the form of a dome.
  • the transmission 13 essentially comprises four radially guided cap sections 3a ', 3b', 3c ', 3d', which are connected on the one hand to the segments 3a-3d and each have a convex cylindrical surface on the radially outer side.
  • the cap portions 3a '- 3d' are supported with their convex cylindrical surfaces in a ring 14 each on an associated cylindrical guide surface 14a, 14b, 14c, 14d.
  • the centers Ma, Mb, Mc Md of the convex cylindrical surfaces are preferably located on the radial displacement vectors of the segments 3a-3d.
  • the ring 14 is rotatably supported about the point of intersection M of the radial displacement vectors of the segments 3a-3d, wherein the point of intersection M of the displacement vectors is again preferably located on the main axis 4 of the hollow molded part.
  • the center points Xa, Xb, Xc, Xd of the cylindrical guide surfaces 14a-14d do not lie on the radial displacement vectors of the respective associated segments 3a-3d, but each with an identical distance thereto.
  • the cap portions 3a '- 3d' and the ring therefore contact each other offset by a distance Y in the region of a contact line N (in Fig. 5a exemplified for segment 3b, cap portion 3b 'and associated guide surface 14b).
  • a force-transmitting element 15 is assigned to the ring 14, which in the Fig. 5a and 5b is shown purely schematically.
  • the force-transmitting element 15 has a (passive) mechanical, pneumatic or hydraulic spring 19, which is connected via a lever arm 20 with the ring 14.
  • a controllable hydraulic cylinder may be provided which serves as a drive or brake unit for targeted adjustment of the ring.
  • an adjustment of the ring 14 via an adjustment of the force or the torque and / or via an adjustment of path or angle of rotation and / or speed or angular velocity and / or accelerations or angular accelerations take place.
  • a modified embodiment comes as a force-giving element 15 and instead of the spring 19, an electric servomotor used.
  • the friction coefficient between the cap portions 3a '- 3d' and the guide surfaces is chosen as low as possible, namely about 0.05 to 0.25 (but preferably below 0.15).
  • As tool materials of the transmission are Case hardening steels, ball bearing steels (type 100Cr6) and all types of cold and high speed steels.
  • the surface hardness of these construction elements is preferably above 60 HRC.
  • rollers are interposed between surfaces sliding against each other.
  • the transmission 13 sets the opening movement of the segments 3a - 3d in a rotational movement of the ring about the rotation axis M. This rotation acts now the power-giving element 15 against.
  • the force-transmitting element 15 controls the radial forces on the segments 3a - 3d preferably such that they press with 10% to 30% of the yield stress of the material to be formed against the hollow mold part. Buckling or buckling of the hollow molded part 1 is prevented.
  • FIG. 8 A fourth embodiment according to Fig. 8 corresponds to the principle according to the previous embodiments, which is why reference can be made to the above description in its entirety and equivalent components are provided with the same reference numerals.
  • the forming tool again comprises a first die 2a, 2b, which in turn has a first annular die part 2a and a second annular die part 2b into which the hollow shaped part 1 is inserted.
  • a forming area U is formed which is not supported by the die parts 2a, 2b.
  • a second adjustable die 3 is arranged, which surrounds the hollow molded part 1 in the forming area U.
  • the second die 3 is subdivided into a plurality of segments 3a, 3b, wherein the segments 3a, 3b are supported on a common ring 14 which is displaceable parallel to the main axis 4 and has a funnel-shaped sliding surface 14e.
  • the segments have corresponding cone-shaped outer surfaces.
  • a plurality of individual wedge elements are provided with planar wedge surfaces instead of the ring 14, which in turn are slidably mounted in the direction of the main axis 4.
  • a ring is provided with a plurality of inside planar sliding surfaces.
  • the ring 14 is optionally rotatably mounted about the main axis 4, it is also and especially in this case divided in the axial direction.
  • the ring 14 or an annular part thereof forms a more or less rigid unit with a plurality of hydraulic rams 16, which in turn are guided in hydraulic cylinders 17 (arrow 18).
  • the hydraulic plunger 16 together with the hydraulic cylinders 17 are components of a common support, actuation, and / or control unit, wherein a plurality of hydraulic cylinders are preferably arranged rotationally symmetrically about the main axis 4 of the system.
  • one or more hydraulic springs are provided in a modified embodiment (analogous to the force-transmitting element 15 in the third embodiment), which act in the direction of the arrow 18 on the ring 14
  • the hydraulic cylinders optionally an active drive in the form of a hydraulic pump with fluid circuit or a passive mechanical, pneumatic or hydraulic spring assigned.
  • the drive is used for targeted adjustment of the ring 14.
  • an adjustment of the ring 14 via an adjustment of the force and / or the path and / or the speed and / or the accelerations of the hydraulic ram done.
  • the friction coefficient between the segments 3 a, 3 b and the guide surfaces is chosen as low as possible, namely about 0.05 to 0.15.
  • Gear tools, ball bearing steels (type 100Cr6) and all types of cold and high-speed steels are provided as tool materials of the gear unit.
  • the surface hardness of these construction elements is preferably above 60 HRC.
  • an active or passive lubrication of the sliding surfaces between the segments 3a, 3b and the ring 14 may be provided with oil, grease or friction reducing surface coatings.
  • the hollow molded part 1 is supported on the inside during a forming step or during a plurality of forming steps by a third die in the form of a cylindrical mandrel 8a, 8b engaging in the hollow shaped part.
  • the hollow molded part is subjected to an axial compression process in a forming step.
  • the hollow molded part 1 is compressed by means of a pressing device 11 in the direction of its main axis 4 such that the hollow molded part 1 is plastically deformed in the Umform Scheme U not supported by the first die 2a, wherein the hollow molded part supported in the forming area U of the second die 3 on the outside becomes.
  • the segments 3a, 3b of the second die 3 are moved in different directions transversely to the main axis of the hollow molded part 1 (arrows 5).
  • Each segment is assigned a separate movement path in the radial direction, the straight lines of the movement paths intersecting one another at a point M on the main axis 4.
  • the die 3 can in turn be opened continuously, stepwise or oscillating in the radial direction.
  • the forming tool according to the invention allows the arrangement of a few (2 ⁇ n ⁇ 5), but also of many (n> 5) segments under uniform load in a small space, since the effect of a single force element mechanically transmitted via a cam gear to n segments and on the Geometry of the arrangement is reinforced.
  • the load amplification allows a very small dimensioning of the force-giving element 15, for example as a hydraulic cylinder, for a prototype transmission part after Fig. 6a, Fig. 6b had a force of 8 kN.
  • An upsetting process with segmented die requires a special uniformity of the support load, as with asymmetric load, a bending of the compression part to the side with little support effect and thus the Euler buckling is initiated.
  • the time response of a mechanically nearly rigid cam gear is essentially delay-free.
  • the time behavior of a hydraulic system with small amounts of oil (control force is small because of the mechanism) is almost ideal. Therefore, another advantage is the fact that by very rapid change of the force-time curve on the hydraulic side, the support behavior of n support segments can be influenced uniformly even with very small forming times simultaneously with the forming.
  • the system can be driven in advance as a passive oil displacement system with controlled backpressure or actively defined by a pump and thus the material flow.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Claims (9)

  1. Procédé pour déformer un élément creux, dans lequel
    - dans une première étape de procédé, une pièce moulée creuse (1) est introduite dans une première matrice (2) qui entoure et supporte de manière annulaire la pièce moulée creuse dans une zone d'appui le long de sa surface latérale, et dans lequel
    - dans une deuxième étape de procédé, à savoir une étape de formage, où la pièce moulée creuse est soumise à une pression axiale, la pièce moulée creuse est compressée vers son axe central de manière à ce que
    - la pièce moulée creuse (1) soit déformée plastiquement dans une zone de formage (U) non supportée par la première matrice (2), étant donné que
    - la pièce moulée creuse est supportée à l'extérieur par une deuxième matrice (3) de géométrie ajustable ou variable, étant donné que
    - la deuxième matrice (3) est subdivisée en direction d'un ou plusieurs plans orientés parallèlement à l'axe principal (4) de la pièce moulée creuse (1) et/ou subdivisée en direction d'un ou plusieurs plans contenant l'axe principal (4) de la pièce moulée creuse en segments (3a, 3b, 3c, 3d), qui
    - soutiennent la pièce moulée creuse (1) à former dans le sens radial sur plusieurs côtés pendant la déformation plastique de cette dernière et qui
    - sont réglables au cours de la déformation plastique de la pièce moulée creuse dans le sens radial, étant donné que
    - plusieurs segments (3a, 3b, 3c, 3d) sont chaque fois positionnés de manière à pouvoir être déplacés par translation le long d'une ligne droite associée, à savoir leur sens de déplacement, étant donné que, pendant le formage, les segments de la deuxième matrice (3) sont déplacés dans différentes directions transversalement par rapport à l'axe principal de la pièce moulée creuse (1), étant donné que la matrice est ouverte en continu, graduellement ou de manière oscillante dans le sens radial, étant donné qu'un trajet de mouvement dans le sens radial est alors associé à chaque segment, étant donné que les lignes droites des trajectoires se croisent en un point M sur l'axe principal (4), étant donné que
    - les lignes droites chaque fois associées de plusieurs segments sont disposées dans un plan, en particulier vertical par rapport à un axe principal de la pièce moulée creuse à former, étant donné que
    - plusieurs, en particulier tous les segments (3a, 3b, 3c, 3d) de la deuxième matrice (3) présentent une même épaisseur transversalement par rapport à leur sens de déplacement qui
    - correspond à deux à vingt fois la valeur de l'épaisseur de paroi initiale (t) de la pièce moulée creuse (1) à former.
  2. Procédé selon la revendication 1, caractérisé en ce que, pendant l'étape de formage,
    la deuxième matrice (3) est déplacée dans une direction transversale par rapport à l'axe principal (4) de la pièce moulée creuse, en particulier est ouverte en continu et/ou progressivement dans le sens radial, et étant donné qu'un mouvement oscillatoire de la deuxième matrice (3) est superposé à un mouvement d'ouverture continu etlou progressif de la deuxième matrice (3).
  3. Procédé selon l'une quelconque des revendications 1 à 2, caractérisé en ce que la deuxième matrice (3) est déplacée pendant l'étape de formage
    - avec une force prédéterminée et/ou
    - est pressée avec une force prédéfinie contre la pièce moulée creuse (1) ebou
    la deuxième matrice (3) est déplacée pendant l'étape de formage
    - le long d'un chemin prédéterminé et/ou
    - avec une courbe de vitesse prédéfinie.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la deuxième matrice (3) et/ou la pièce moulée creuse (1) sont tournés pendant l'étape de formage autour de l'axe principal (4) de la pièce moulée creuse.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que plusieurs segments (3a, 3b, 3c, 3d) de la deuxième matrice (3) sont soumis à un élément de transmission commun avec des forces essentiellement similaires.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la premier matrice (2) est réalisée en plusieurs pièces, étant donné qu'une première pièce de matrice (2a) et une deuxième pièce de matrice (2b) sont positionnées espacées fun de l'autre dans la première étape de procédé positionné et dans lequel la première pièce de matrice (2a) et la deuxième pièce de matrice (2b) sont déplacées pendant l'étape de formage l'une vers l'autre, en particulier conduites continuellement l'une vers l'autre.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la premier matrice (2) est réalisée en plusieurs pièces, étant donné qu'une première pièce de matrice (2a) et une deuxième pièce de matrice (2b) 3 sont positionnées espacées l'un de l'autre dans la première étape de procédé positionné et dans lequel la première pièce de matrice (2a) et la deuxième pièce de matrice (2b) sont divergée pendant l'étape de formage, en particulier éloignées continuellement l'une de l'autre.
  8. Procédé selon l'une quelconque des revendications 6 à 7, caractérisé en ce que tout mouvement continue de la première pièce de matrice (2a) et de la deuxième pièce de matrice (2b) est superposée à un mouvement oscillatoire des pièces de matrice et/ou de la pièce moulée creuse (1).
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la pièce moulée creuse (1) est soutenue côté intérieur pendant l'étape de formage par une troisième matrice sous forme de broche qui prend dans le pièce moulée creuse à emboîtement intérieur, en particulier une broche ajustable et/ou élastiquement déformable.
EP08806905.9A 2007-08-25 2008-08-24 Procédé pour déformer un élément creux Not-in-force EP2180964B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08806905.9A EP2180964B1 (fr) 2007-08-25 2008-08-24 Procédé pour déformer un élément creux

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP07016691A EP2030701A1 (fr) 2007-08-25 2007-08-25 Outil et procédé destinés à la fabrication d'un élément creux
EP08806905.9A EP2180964B1 (fr) 2007-08-25 2008-08-24 Procédé pour déformer un élément creux
PCT/IB2008/002189 WO2009027789A2 (fr) 2007-08-25 2008-08-24 Outil et procédé pour produire un élément creux

Publications (2)

Publication Number Publication Date
EP2180964A2 EP2180964A2 (fr) 2010-05-05
EP2180964B1 true EP2180964B1 (fr) 2014-07-30

Family

ID=38863417

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07016691A Withdrawn EP2030701A1 (fr) 2007-08-25 2007-08-25 Outil et procédé destinés à la fabrication d'un élément creux
EP08806905.9A Not-in-force EP2180964B1 (fr) 2007-08-25 2008-08-24 Procédé pour déformer un élément creux

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07016691A Withdrawn EP2030701A1 (fr) 2007-08-25 2007-08-25 Outil et procédé destinés à la fabrication d'un élément creux

Country Status (2)

Country Link
EP (2) EP2030701A1 (fr)
WO (1) WO2009027789A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2753073C1 (ru) * 2020-12-08 2021-08-11 Федеральное государственное бюджетное образовательной учреждение высшего образования "Тульский государственный университет" (ТулГУ) Способ получения рифлей на наружной поверхности оболочки

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012003174B4 (de) * 2012-02-17 2017-06-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zum Herstellen eines Hohlprofils mit Abschnitten unterschiedlicher Wandstärke
EP2711106A3 (fr) * 2012-09-19 2014-12-03 IFUTEC Ingenieurbüro für Umformtechnik GmbH Procédé de fabrication d'épaississements larges en forme de bride sur une pièce creuse
TWI494179B (zh) * 2012-09-28 2015-08-01 Twdt Prec Co Ltd Mandrel manufacturing method
DE102013209948A1 (de) * 2013-05-28 2014-12-18 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Verfahren zur Bearbeitung oder Umformung hochbelastbarer Bauteile in Kraftfahrzeugen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987001062A1 (fr) * 1985-08-14 1987-02-26 Gesenkschmiede Schneider Gmbh Procede de production par filage lateral de brides ou de colliers sur des pieces creuses
DE4201819A1 (de) * 1991-01-28 1992-07-30 Mannesmann Ag Verfahren und vorrichtung zum hydraulischen aufweiten von rohrfoermigen hohlprofilen
JP3554273B2 (ja) * 1997-10-20 2004-08-18 ボーリンガー，ヨーゼフ 一本の管から軸を製造する方法、一本の管から軸を製造する装置及び一本の管から製造されるカムシャフト
US6572358B1 (en) * 2001-11-15 2003-06-03 Pilot Industries, Inc. Die assembly for forming a bead on a cylindrical tube
DE10204107B4 (de) * 2002-02-01 2018-12-13 Mahle International Gmbh Abgaswärmeübertrager
DE102004032122A1 (de) * 2004-07-01 2006-01-19 IFUTEC Ingenieurbüro für Umformtechnik GmbH Verfahren zum Umformen von Rohrelementen und Verfahren zur Herstellung von Hohlwellen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2753073C1 (ru) * 2020-12-08 2021-08-11 Федеральное государственное бюджетное образовательной учреждение высшего образования "Тульский государственный университет" (ТулГУ) Способ получения рифлей на наружной поверхности оболочки

Also Published As

Publication number Publication date
EP2180964A2 (fr) 2010-05-05
WO2009027789A2 (fr) 2009-03-05
EP2030701A1 (fr) 2009-03-04
WO2009027789A3 (fr) 2009-07-02

Similar Documents

Publication Publication Date Title
DE102008036226B4 (de) Verfahren zur Herstellung einer Hohlwelle
DE4301124C2 (de) Verfahren zum Verbinden einer Zylinderbuchse mit einem Grundkörper
EP2180964B1 (fr) Procédé pour déformer un élément creux
DE10100868B4 (de) Kaltwalz-Umformmaschine und Werkzeug zum Herstellen von flanschförmigen Erzeugnissen bzw. von Flanschen aus einem zylindrischen Vorprodukt
WO2011047921A1 (fr) Procédé de fabrication d'une broche pour un mécanisme à broche, vis d'entraînement à roulement munie d'une telle broche et utilisation de la vis d'entraînement à roulement
EP0955110B1 (fr) Procédé et dispositif pour le fluotournage
DE102010015835A1 (de) Verfahren zum maschinellen Herstellen von zylinderförmigen Werkstücken
EP2205371B1 (fr) Procédé pour fabriquer des systèmes à double tube
EP1602472B1 (fr) Procédé et installation pour la préparation d'une pièce compactée à partir de poudre
DE2851944A1 (de) Vorrichtung zur herstellung von rohrkoerpern mit axial aufeinanderfolgenden querwellen
DE102010027093A1 (de) Verfahren zur Herstellung eines Hohlprofils aus Metall
DE102007040130B3 (de) Vorrichtung und Verfahren zum Umformen eines Werkstückes
WO2008003305A1 (fr) Procédé de production d'une pièce à symétrie de rotation et pièce ainsi obtenue
DE19901015A1 (de) Vorrichtung und Verfahren zum umformtechnischen Fügen von Teilen
EP0953386A2 (fr) Dispositif et méthode de connection des pièces par déformation plastique
EP3912759A1 (fr) Procédé et dispositif d'augmentation de la durabilité d'un arbre
EP3302948B1 (fr) Unité d'application de force de fermeture
EP1611973B1 (fr) Procédé de formage de tubes et de fabrication d'arbres creux
DE19955321A1 (de) Rundknetmaschine mit hydraulischem Kraftausgleich
DE3923358A1 (de) Verfahren und presse zur herstellung kaltgeformter rohrfoermiger koerper
DE112006003990B4 (de) Verfahren zum Umformen von Hohlprofilen
EP3210686A2 (fr) Procédé et dispositif de façonnage incrémentiel d'éléments profilés ou tubulaires
DE102007007369A1 (de) Synchronisiereinrichtung für ein Schaltgetriebe
DE102009009982A1 (de) Verfahren zur Herstellung innen- und außenprofilierter Werkstücke
EP3345694B1 (fr) Procédé et dispositif pour épaissir locallement un corps creux

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100223

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

17Q First examination report despatched

Effective date: 20101026

DAX Request for extension of the european patent (deleted)
APBK Appeal reference recorded

Free format text: ORIGINAL CODE: EPIDOSNREFNE

APBN Date of receipt of notice of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA2E

APBR Date of receipt of statement of grounds of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA3E

APAZ Date of receipt of statement of grounds of appeal deleted

Free format text: ORIGINAL CODE: EPIDOSDNOA3E

APBR Date of receipt of statement of grounds of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA3E

APAV Appeal reference deleted

Free format text: ORIGINAL CODE: EPIDOSDREFNE

APBT Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9E

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20140206

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 679699

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140815

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502008012063

Country of ref document: DE

Effective date: 20140911

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20140730

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141030

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141202

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141031

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141030

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141130

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140831

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140824

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502008012063

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20141030

26N No opposition filed

Effective date: 20150504

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141030

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140824

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140824

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20080824

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20180827

Year of fee payment: 11

Ref country code: FR

Payment date: 20180824

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CZ

Payment date: 20180816

Year of fee payment: 11

Ref country code: CH

Payment date: 20180827

Year of fee payment: 11

Ref country code: AT

Payment date: 20180821

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502008012063

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502008012063

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 679699

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190824

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190824

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190824

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190831

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200303

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190831