WO2011113954A1 - Procédé et dispositif de fabrication de bagues profilées - Google Patents

Procédé et dispositif de fabrication de bagues profilées Download PDF

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Publication number
WO2011113954A1
WO2011113954A1 PCT/EP2011/054210 EP2011054210W WO2011113954A1 WO 2011113954 A1 WO2011113954 A1 WO 2011113954A1 EP 2011054210 W EP2011054210 W EP 2011054210W WO 2011113954 A1 WO2011113954 A1 WO 2011113954A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
sealing element
profiling
die
mold
Prior art date
Application number
PCT/EP2011/054210
Other languages
German (de)
English (en)
Inventor
Mathias Bihler
Bernd Haussmann
Christoph Schäfer
Oliver Göb
Hansjürgen MATTHEIS
Sonja Döhler
Original Assignee
Otto Bihler Maschinenfabrik Gmbh & Co. Kg
Elringklinger Ag
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
Priority claimed from DE201010003062 external-priority patent/DE102010003062A1/de
Priority claimed from DE102011001279A external-priority patent/DE102011001279A1/de
Application filed by Otto Bihler Maschinenfabrik Gmbh & Co. Kg, Elringklinger Ag filed Critical Otto Bihler Maschinenfabrik Gmbh & Co. Kg
Priority to DE112011100966.6T priority Critical patent/DE112011100966B4/de
Publication of WO2011113954A1 publication Critical patent/WO2011113954A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0887—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing the sealing effect being obtained by elastic deformation of the packing
    • 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
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/06—Corrugating tubes transversely, e.g. helically annularly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/16—Making other particular articles rings, e.g. barrel hoops

Definitions

  • the present invention relates to a method for producing a profiled ring, in particular metal ring, and a method for reworking an already profiled ring, a forming device for performing the two methods and a working machine, in particular a punching and / or bending machine with at least one such forming device.
  • Profiled rings in particular profiled metal rings, are used for example as sealing rings in engines or engine components, such as gaskets for turbocharger or the like.
  • Metallic sealing elements are known, for example, from DE 10 2004 060 845 A1. These sealing elements are annularly formed from a metallic material and have a substantially C-shaped spatial form in cross section, the cross section being open in an axial direction.
  • the sealing element as such is annular in the broadest sense. In the radial direction of the ring, this sealing element can be elastically deformed by the c-shaped cross section a piece. Such a sealing element can be produced by deep drawing.
  • Another sealing element is known from DE 10 2006 045 584 A1, wherein these metallic sealing elements have a c-shaped or V-shaped profile cross-section open inward in a radial direction.
  • these metallic sealing elements can have a meander-shaped profile cross-section.
  • Such sealing elements with a shaped cross-sectional profile are usually produced as follows. It is a cylindrical tube blank by means of a hydroforming process in a corresponding die in a corrugated tube with radial circumferential, annular beads formed. From this corrugated pipe section, a piece comprising one or more such annular beads is cut to length by means of conventional separation methods, for example by means of sawing or laser cutting. The resulting cut edges are not suitable as sealing edges, since usually too large trimming tolerances arise that make reliable sealing impossible only by the trimming edges themselves.
  • a reshaping is carried out after the cutting process, in each case in the region of the cut edges, so that a defined sealing edge, usually in the form of a kink (seen in cross-section), is generated somewhat spaced from the cut edges. Only such a sealing edge produced in the form of a kink can ensure a reliable seal in an installation situation, for example in a mounting situation in the exhaust system of an automobile.
  • a production method based on a blank production in hydroforming process is complicated and expensive.
  • a method for producing a support ring for a sealing ring in which a ring is first formed from a continuous sheet metal strip and this ring is subsequently formed by roll forming or deep drawing.
  • This support ring is made by vulcanizing a Plastic to a dynamic sealing ring, in particular a shaft seal further developed.
  • a bellows-type metallic sealing element and a method for producing the same are not disclosed.
  • a method for producing a sealing ring in which in a first step by forming a hollow cylindrical ring of a flat material, a support ring blank is made. This support ring blank is then formed by a deep drawing process. The support ring blank serves as a scaffold for overmolding with a polymer plastic to form e.g. a shaft seal.
  • the metallic support ring of this sealing ring thus has no sealing function itself.
  • the object of the invention is to provide a method and an apparatus for producing a profiled ring in order to achieve a better quality profiled rings while saving material and lower manufacturing costs.
  • Another task aspect is to provide a method by which metallic bellows-like sealing elements, in particular in cross-section corrugated metallic bellows-like sealing elements can be produced in a cost effective, simple and process-safe manner.
  • the method for producing a profiled ring, in particular a metal ring comprises the following steps:
  • the cylindrical ring is brought with its axial edges before the step of forming into a profiled ring on the die in abutment, preferably in this clamped and offset together with the die in rotation about a Gesenkmosachse.
  • the ring to be formed can be rotated relative to the profiling element, so that the ring can be continuously formed by means of the profiling element.
  • the at least one profiling element can be moved in relation to the ring in the radial direction to the inner circumference, in order to press the lateral surface of the ring in the radial direction to the outside. The further advanced the forming process of the ring, the more comes the original Liche lateral surface of the cylindrical ring in profiled form in contact with the die.
  • the at least one profiling element is designed roller-like and during the forming process performs a rotational movement about its axis of rotation offset in the radial direction and in the axial direction normally parallel roller rotation axis.
  • Such a roller-like configuration of the profiling element and rotatability of the profiling element likewise assists the continuous shaping of the cylindrical ring to the finished profiled ring already mentioned above.
  • the profiling of the cylindrical ring thus takes place by applying pressure in the radial direction by means of the profiling element and by rolling the die together with the ring along the profiling element.
  • a kinematic reversal is conceivable, namely that the die is rotatably disposed with received cylindrical ring and the profiling element along the inner circumference of the ring to be formed performs a circular movement.
  • the rotational movement of the profiling element is preferably a passive rotary movement transmitted by the rotation of the die and the ring, in particular by friction, and / or an active rotary movement generated by a roller drive.
  • an active rotational movement it is also conceivable that the profiling element is actively driven only at the beginning of a forming operation in order to bring the profiling element in accordance with a rotational speed of the die and the ring to a substantially same rotational speed.
  • the profiling element will preferably exert pressure in the radial direction on the ring until the deformation of the cylindrical ring to the profiled ring has been completed.
  • the ring will make at least one complete 360 ° turn around the die axis of rotation so that it will fully profile is. It is also conceivable that the profiling element first performs a pre-profiling of the ring with a lower pressure during a first complete revolution of the ring and then the pressure in the radial direction is increased, ie the profiling element is displaced linearly in the direction of the ring relative to the die Completely reshape the ring during a second or further complete revolution.
  • the choice of the number of revolutions of the ring during the forming process to the complete profiling of the ring can be chosen arbitrarily according to the Profil istskomplextician or the material used, in particular the material thickness.
  • the number of revolutions depending on the arrangement of the profiling elements can be reduced if necessary. If, for example, three profiling elements are provided which are distributed regularly along the circumference of the ring, a complete profiling of the ring may possibly already have taken place after rotation about a third of a circle, that is about 120 °. In the case of a kinematic reversal (fixed ring), the profiling element rolls along the circumference of the ring until it has followed the entire circumference at least once.
  • the ring After completion of the profiling of the ring, the ring can be removed from the die. In this case, preferably after completion of the profiling of the ring, the profiling element is moved in the radial direction away from the ring to release it.
  • the ring to be reshaped is received in sections and continuously between the profiling element and the die and, according to the shaping of the profiling element or the die, the lateral surface of the cylindrical ring is brought into the desired profile shape. As long as the profiling element rests against the ring, this is clamped between profiling element and die. This clamping effect can then be seen after completing the Profiling be solved by moving away the profiling element in particular in the radial direction of the ring. The finished profiled ring can then be removed in particular by opening the die out of this.
  • a method for reworking an already profiled ring, in particular metal ring which comprises the following steps :
  • Such a post-processing method allows a simple quality improvement in already produced profiled rings.
  • the die and the profiling element of the profile shape of the already profiled ring should substantially correspond.
  • the invention also relates to a forming apparatus for carrying out a manufacturing method or a post-processing method described above, wherein the forming apparatus comprises:
  • the at least one profiling element and the die are arranged so that they are movable relative to each other, in particular rotatable to each other and / or linearly movable, wherein the at least one profiling element is formed such that in the radial direction relative to the in the die recorded ring is partially exerted pressure on the die and the cylindrical ring received therein in order to transform the cylindrical ring into a profiled ring.
  • the die is rotatable about a Gesenk loftachse.
  • the at least one profiling element is preferably of a roller-like design and is movable with its outer circumferential surface toward a corresponding mold section of the die, preferably in such a way that during the forming of the cylindrical ring into the profiled ring, the outer peripheral surface and the mold section at least partially interlock.
  • this intermeshing takes place with the interposition of the ring to be profiled or profiled so that there is no direct contact between the profiling element and the die per se.
  • the at least one profiling element is preferably rotatably mounted about a roller axis.
  • the forming device comprises a die drive device which rotates the die about the die axis of rotation.
  • a Profiltechniksantriebs leverage be provided, which moves the at least one profiling element relative to the Gesenkfanachse in the radial direction relative to the die linear.
  • the profiling drive device can set the at least one profiling element at least temporarily during the forming process in rotation about the roller axis.
  • the invention also relates to a working machine, in particular a punching and / or bending machine with at least one punching and / or bending machine. connected forming device for performing the mentioned method steps.
  • the object of the invention in a further aspect is to provide a precisely manufactured bellows-type sealing element which can be produced precisely, in particular without machining, and which also has an increased length compensation capability in an axial direction. Furthermore, a metallic sealing element is to be specified, which in a simple manner in terms of its spring rate in the axial direction is constructively adaptable to a variety of boundary conditions.
  • a metallic, bellows-type sealing element is to be specified, which retains its resilient bias better over the lifetime, in particular in high-temperature applications, for example in the exhaust system of a motor vehicle or other hot temperature applications, than already known metallic sealing elements.
  • Such a sealing element is to be prepared by the method explained above.
  • the preparation process can also be described as follows:
  • An inventive method for producing a metallic, in particular bellows-type sealing element has at least the following steps: a) providing a tubular blank as a ring of metal;
  • an application of a contact force F directed radially outward with respect to the blank takes place, which presses the roller punch gene an inner side of the blank presses and - a rolling of the inner punch during the application of the contact force F takes place on the inside of the blank, wherein the blank circumferentially the cross-sectional contour of the mold relief is acceptably plastically deformed.
  • the shaping of the bellows-type sealing element takes place in that the blank is formed rolling while applying or maintaining a contact force F in the radial direction between the roller punch and the forming tool.
  • the pressing force F which is generated on an inner side of the blank by advancing the roller punch radially outward on the mold, is expediently increased radially with increasing delivery of the roller punch to the outside, but at least kept the same. This means that with increasing deformation of the blank in the form of relief by adjusting the roller punch radially outward on the mold to the contact force F should be maintained or even increased.
  • the method further comprises the step that the mold is actively set in rotation by means of a drive and the roller punch is actively set in rotation by means of another drive, such that the roller stamp comes into contact with the blank in a slip-free or nearly slip-free manner wherein the active drive of the roller punch is turned off when the roller punch is in frictional contact with the blank and the roller punch is rotationally driven during the shaping by friction from the blank.
  • the roller punch and / or the mold are actively set in rotation around its respective central axis and the roller punch and the mold are actively approached in the radial direction.
  • the sealing element after shaping in the mold in its axial direction can be slightly compressed.
  • undercuts can be produced in particular in the longitudinal section, which would not be able to be produced alone in the mold together with the roller punch.
  • wall areas that depart from arcuate sections can taper towards one another.
  • the sealing element can be deformed into an oval, preferably compressed, which causes a particular clamping for mounting on cylindrical components and thus represents a captive or easier assembly.
  • the method according to the invention can advantageously be used as a preforming step, then as a finishing step and, if appropriate, as a calibration step, if appropriate in different molding tools.
  • the sealing element can be produced in a simple multi-stage manner with one and the same basic method II.
  • the conventional hydroforming process optionally a separation process and another Nachformmaschine, e.g. a reshaping be applied.
  • successive or adjacent arc sections of the sealing element can be manufactured by means of the roller die individually and in succession. This is particularly useful when grooves and arc segments of a sealing element have a certain minimum axial distance from each other.
  • a sealing element can be formed, which has a curved section adjacent to a sealing edge, then extends in a cylindrical cylinder-like manner and, in turn, has an arc section in the region of the second sealing edge.
  • a Mehrfachrollen- Stamp simultaneously form several arc sections, in particular up to four arc sections of the sealing element.
  • a tube section produced from a sheet-metal strip can be used with an interface, wherein the tube section is preferably welded or soldered at the interface.
  • a seamless tube can also be used, with the first variant in particular being more cost-effective, in particular in applications in vehicle construction.
  • the mold is designed as a non-divisible, but optionally as a disassemblable mold whose smallest free inner diameter D, is greater than the final outer diameter D 2 of the blank or a present in an intermediate molding step blank or the sealing element, so that in each case the formed part can be removed from the mold.
  • the sealing element or the blank is arranged eccentrically in the mold during the shaping step and is in contact only with a relief form, which is formed for example from a relief web of the mold and a counter-relief of the roller punch.
  • the free inner diameter of the mold is about 1% to 40%, preferably 2% to 20%, ideally 3% to 10% larger than the outer diameter Di of the sealing element.
  • the roller punch preferably has a largest outer diameter D a , which is smaller than the smallest inner diameter of the molded sealing element or the blank or the blank in an intermediate molding stage, so that after the forming step of the blank or the sealing element of Roller stamp can be removed.
  • the outer diameter D a of the roller punch is 1% to 40%, preferably 2% to 20%, ideally 3% to 10% smaller than the smallest free inner diameter Di of the molded sealing element.
  • the blank is formed before shaping by means of a bottom piece and possibly also by means of a cover plate, which e.g. Part of the mold may be positioned and / or held in an axial direction relative to the mold relief.
  • the blank may be fixed through the bottom piece and the top plate during the forming step, wherein advantageously the bottom piece and / or the top plate during the forming step in the axial direction adapted to the decreasing axial height h of the blank during deformation be delivered.
  • an axial compressive force is applied to the blank or the sealing element located in a deforming step during the forming step to assist the flow of the blank material and the nesting of the blank to the mold relief.
  • the invention relates to a bellows-type sealing element which can be produced or produced by the method according to the invention.
  • the sealing element at least in an edge region in cross-section on a kink, wherein the kink forms a sealing edge in the intended use of the sealing element.
  • the sealing element is conically tapering or widening in its axial direction. educated.
  • a further advantageous embodiment of the sealing element according to the invention is that free edges of the sealing element at one end of the sealing element point radially inward to the central axis of the sealing element.
  • the sealing element according to the invention is formed bellows-like, so that it is resilient in the axial direction and thus has a self-bias and a length-adaptability in the installed state.
  • a bellows-like configuration of the resilient sealing element is of particular advantage, since the stresses in several arcuate portions of such a resiliently biased sealing element is less than in a cross-sectionally C-shaped sealing element, so that at high temperatures flowing of the material in the sealing element according to the invention only takes place later.
  • the sealing elements according to the invention in the high temperature range can be used particularly advantageously.
  • sealing element in particular steel, in particular stainless steel or high-alloy nickel alloys or nickel-cobalt alloys, z.
  • steel in particular stainless steel or high-alloy nickel alloys or nickel-cobalt alloys, z.
  • Inconel, and spring steel proven.
  • radii R t R 2 , R 3 of the soil gene sections of the bellows-like sealing element be different sizes. This opens in particular a great deal of design freedom in the design and adaptation of a sealing element to constructive boundary conditions.
  • Fig. 1 shows in the partial figures a) to c) purely schematically and in one
  • FIGS. 2 and 3 show in the illustrations 2a) to c) and 3a) and b) purely schematically and in a schematic representation of the manufacturing method according to the invention in an enlarged and simplified sectional view of the die, umzuformendem ring and profiling element.
  • FIG. 4 shows a schematic sectional view of an example of a two-part die with a profiling element for carrying out the method.
  • Fig. 5 shows another embodiment of a die with profiling element as a partial view in a sectional view of a larger work machine.
  • Fig. 6 shows schematically enlarged in longitudinal section (line A-A of Figure 7a) a metallic, bellows-type sealing element according to the invention.
  • 7a, 7b, 7c show a plan view, a side view and an isometric view of a metallic bellows according to the invention gene sealing element.
  • Fig. 8 shows a longitudinal sectional view (line A'-A 'of Figure 7) of the metallic bellows-like sealing element according to the invention.
  • Fig. 9 shows schematically a blank for an inventive
  • FIG. 10 shows a cross section through a production tool (preforming step) for producing a sealing element according to the invention.
  • FIG. 10 a shows a detailed detail from FIG. 10 (detail X).
  • Fig. 1 1 shows a cross section through a second production tool for
  • Fig. 1 a shows the detail X of Fig. 1 1
  • Fig. 12 shows schematically the sequence of the manufacturing method according to the invention.
  • Fig. 1 shows in part a) schematically and greatly simplified a forming device 10 for carrying out a method for producing profile rings.
  • the forming device 10 comprises a die 12, which is preferably ring-like or ring-like, and a profiling element 14.
  • the die 12 and the profiling element 14 are movable relative to one another, in particular rotatable relative to one another and / or relative to a die axis GA relative to the radial direction mutually displaceable.
  • the profiling element 14 is preferably designed like a roller and is also referred to below as profiling roller.
  • a metal ring 16 to be reshaped, in particular a metallic ring 16 is shown schematically.
  • the ring 16 is shown here concentrically to the die 2 for purposes of explanation of the manufacturing process. However, it is not absolutely necessary that the ring 16 to be reshaped is always arranged exactly concentric with the die or profiling roller 14 at the beginning of a forming process. It is also conceivable that the ring 16 rests with its outer circumference, for example due to gravity on a lower peripheral portion of the die 12.
  • Fig. 1 b shows the state of the forming device during forming of the ring 16 to the profiled ring.
  • the profiling element 14 and the die 12 were displaced in the radial direction R relative to each other. This relative movement can also be achieved in that only the profiling element 14 or only the die 12 is displaced together with the ring 16 in the radial direction R. In the present example, it is indicated that the profiling roller 14 is moved towards an upper inner peripheral portion of the die 12.
  • the profiling roller 14 can be moved in any radial direction starting from the Gesenkachse GA, ie also down or to the left or right with respect to the present representation.
  • the outer periphery of the profiling roller 14 is pressed in the radial direction against an inner peripheral portion of the die 12 so that the ring 16 is clamped between the profiling roller 14 and the die and according to the die shape is transformed.
  • the die 12, the ring 16 and the profiling roll 14 rotate relative to each other. It is preferred if the die 12 is driven with the ring 16 received therein by a corresponding, not shown here drive device for the die.
  • the profiling roller 14 is preferably rotatable around stored a roller axis RA, so that it can be rotated in the state shown in FIG. 1 b) passively due to the frictional forces acting.
  • the profiling roller 14 has its own drive which at least temporarily supports the rolling movement of the profiling roller 14 along the inner periphery of the die 12.
  • the continuous mutual unwinding of die 12, ring 16 and profiling roll 14 together causes the ring 16 to be continuously reshaped. Due to the clockwise direction of rotation (arrow DR) shown in FIG. 1 b), a shaped profile ring section 16 a is already visible.
  • the rotational movement of the die 12 takes place at least until the entire ring 16 has been completely reshaped, that is to say the die or the ring has performed at least one complete revolution through 360 ° or possibly a little more.
  • the die 12 and also the ring 16 may make several turns until the profiled ring is completely made.
  • the profiling roller 14 acts with a still slightly lower pressure in the radial direction of the ring and is further increased in a subsequent rotation of the pressure.
  • the deformation of the ring 16 to the finished profile ring takes place by a complete revolution.
  • FIG. 1 c) shows the state of the shaping device after completion of the profiling process, in which case the entire ring 16 has now been reshaped, that is, it is now present as a profiled ring in the die 12.
  • the profiling roller 14 has been moved away from the inner periphery of the die 12 in the radial direction, so that the profile ring 16 is released again and can be removed from the die 12.
  • the profiled ring 16 is shown in Fig. 1 c) slightly thicker, since it has a larger, visible in the axial direction peripheral surface due to the profiling.
  • FIG. 2 and 3 show greatly simplified and schematically sectional views corresponding to the section lines II-II and III-III of Fig. 1, wherein Fig. 2a) substantially corresponds to Fig. 1 a), Fig. 2c) is substantially the Fig. 1 b) and Fig. 3b) substantially of Fig. 1 c).
  • Figs. 2b) and 3a) Sectional views represent intermediate steps of the method, which are not apparent in FIG.
  • Fig. 2a shows a sectional view of the cylindrical ring 16 which is received in particular with a front and rear peripheral edge 16-1 and 16-2 in the die 12, in particular clamped in this.
  • the profiling roller 14 is still arranged at a distance from the die 12, so that the ring 16 between profiling roller 14 and die 12 could be received in the forming device.
  • Fig. 2b shows the relative displacement of Profiltechniksrolle 14 and die 12 to each other in the radial direction R (see arrow in Fig. 2a)).
  • the profiling roller 14 is preferably moved in the radial direction to the die 12.
  • the ring 16 touches with its lateral surface 16-3 Abstützradienabliee 18 of the die 12.
  • the ring 16 is thus tilted under the action of the profiling roller 14 to these support radii 18 in a certain way and pressed in the radial direction in the die 12.
  • the forming of the ring takes place, as already explained with reference to FIG. 1, by turning the die together with the ring 16, so that the ring 16 is shaped in sections and continuously along its circumference.
  • Fig. 2c shows the state in which the profile ring 16 is converted the most when the profiling roller 14 is fully inserted into the die 12.
  • the here in cross-section approximately V-shaped ring shape may also be arcuate or U-shaped, possibly also almost rectangular or the like. Run.
  • the ring in the present example it is shaped convexly with respect to its radial direction. By appropriate shaping of the die and the profiling role, however, it is also conceivable that a concave configuration with respect to the radial direction is selected.
  • the ring 16 and the profiling roller 14 When unrolling the die 12, the ring 16 and the profiling roller 14 to each other in the profile ring 16 and an edge portion 16-4 is formed.
  • This edge portion 16-4 can be smoothed by changing the shape of the profiling roller 14 and the die 12 to the desired extent.
  • the overall dimensioning of the ring takes place in the end position of the profiling roller 14 shown in FIG. 2c.
  • a kind of finish takes place in this position due to the compressive force of the profiling roller 14 on the profiled ring 16 for the die 12. This pressure force acts for the most part in the radial direction.
  • the profiling roller 14 can, as shown in FIG. 3 a), in the radial direction R are moved away from the die 12 again.
  • the clamping of the ring 16 between profiling roller 14 and die 12 is released, so that the profiled ring 16, as shown in Fig. 3b) can be removed from the die.
  • the removal of the profiled ring 6 is preferably carried out automatically.
  • FIG. 4 shows by way of example a die 112 which comprises a first die ring 1 2a and a second die ring 1 12b.
  • the two die rings 1 12a, 1 12b can preferably be screwed together to form a complete die 1 12.
  • the Gesenkachse GA can be seen, which has already been explained with reference to FIG. 1.
  • a profiling roller 1 14, which is inserted into the die 112 in the axial direction.
  • the profiling roller 1 14 is in the radial direction R relative to the die 1 12 movable to reshape a received in the die 1 12, not shown here ring according to the presented method according to FIGS. 1 to 3. From FIG. 4, a length of the feed surface 120 and a so-called.
  • Gesenkumble GB are also visible.
  • This catchment surface length 120 and the die width GB can be selected according to the forming result to be achieved.
  • the length of the feed surface 120 has a particular effect. kung on the smoothing of the edge portion 16-4 of the profiled ring.
  • FIG. 5 shows, in a sectional illustration similar to FIG. 3, a forming device 210 which is attached to further components of a working machine, not described in more detail, with such a shaping device.
  • a profiled roller 212 and the profiling roller 214 can be seen here.
  • the profiling roller 214 is connected to a type of shaft 222 by means of screw connections 226.
  • the die 212 is closed in the axial direction by front and rear limiting members 228 and 230, respectively.
  • the ring which is not shown here, can be accommodated and then formed by means of radial adjustment of the profiling roller 214 to the die 212.
  • the radial displacement required for reshaping takes place in this exemplary embodiment with respect to the selected representation upward in accordance with the arrow R.
  • the die 212 is connected to a shaft 232, which is itself connected to a drive, not shown, so that the die 212 can be rotated in rotation about the Gesenkachse GA.
  • the die plays a minor role in the implementation of the manufacturing process. It is essential that the die and the profiling role are designed such that they can be rolled relative to each other with the interposition of the ring to be formed to each other. By this rolling movement, the sections and continuous deformation of the ring to the profile ring.
  • a metallic sealing element 1 according to the invention has a substantially annular spatial form and is in longitudinal section bellows corrugated in the manner of a corrugated pipe with circumferential bead-like elevations 1 a and groove-like recesses b formed.
  • the bead-like elevations 1 a point in a radial direction 101 to the outside, away from a central axis M. Between two bead-like elevations 1 a, a groove-like recess 1 b is arranged.
  • the elevations 1 a have on the outside with respect to the sealing element 1 a zenith Z. On the inside have the groove-like depressions 1 b a zenith Z '.
  • the metallic sealing element has a first free edge 2 and a second free edge 3. Adjacent to the free edges 2, 3, 2 sealing edges (first sealing edge 4 and second sealing edge 5) are arranged. In the further course of the cross section follows on the sealing edge 4, first, a first arc section 6. Following this, the metallic sealing element 1 has a counter-curved second arc section 7. Between the second arc section 7 of the second sealing edge 5 sits a third arc section eighth
  • an inner side 1 1 and an outer side 12 of the sealing element 1 is defined.
  • Both between the arc sections 6, 7, 8 and between the first arc section 6 and the sealing edge 4 as well as between the third arc section 8 and the second sealing edge 5 may optionally be present in cross section straight sections. However, the arc sections 6, 7, 8 can also merge directly into each other or run directly into the sealing edges 4, 5.
  • the metallic sealing element has a height h and an outer diameter. knife D 2 and a free inner diameter D L
  • the metallic sealing element has a central axis M.
  • the free edges 2, 3 are aligned in the axial direction 100 approximately at the zenith Z '.
  • sealing elements 1 are considered in the context of the invention as bellows-like sealing elements, since they are formed in an axial direction 100 (parallel to the center axis M) resiliently wavy longitudinal section, so that an axial length compensation between two adjacent sealing partners, between which the sealing element 1 is arranged is possible.
  • Such a bellows-type sealing element can not be produced, for example, by deep-drawing with linearly movable mold halves.
  • thermoforming methods only corrugated sealing rings can be produced, whose wavy course runs in the radial direction 101 and not in the axial direction 100 as in the bellows-type sealing element according to the invention.
  • the dimension h (height of the metallic sealing element) between the sealing edges 4, 5 measured to tolerate circumferentially around the metallic sealing element only in the tenth range.
  • a tolerance of +/- 0.2 mm has proven itself with a height h of 8 mm.
  • radii Ri, R 2 , R 3 of the arc sections 6, 7, 8 have radii of a few millimeters, in particular in the range of 2 mm to 5 mm proven.
  • the radii Ri, R 2 , R 3 can each be chosen to be the same size or different sizes.
  • As a free opening angle a which is preferably the same for all arc sections 6, 7, 8, an angle of 45 ° ⁇ ⁇ 65 °, in particular of 50 ° ⁇ ⁇ 60 ° has proven.
  • the details refer to the dimensions of the metallic sealing element in the non-installed, so not strained state.
  • the invention may also be expedient, for example, to select the free opening angles of the first arc section 6 and of the third arc section 8 to be the same and optionally to select the free opening angle ⁇ of the second arc section 7 differently therefrom. In most cases, a symmetrical in cross section training has proven. However, the invention is not limited to this embodiment. Furthermore, it is within the scope of the invention to produce the sealing element with arc sections 6, 7, 8 described above as well.
  • the arcuate sections 6, 7, 8 are open inwardly or outwardly in the radial direction 101 of the metallic sealing element 1, so that the free edges 2, 3 are also preferably each in the radial direction 101, in any case substantially. chen in the radial direction 101 point.
  • a metallic sealing element 1 according to the invention between two parts to be sealed 10a, 10b (first part 10a, part 10b, shown in highly schematic form in FIG. 7b)
  • the metallic sealing element 1 is joined by joining or joining the parts 10a, 10b to be sealed with respect to its longitudinal section in the axial direction 100 pressed.
  • the arc sections 6, 7, 8 are resiliently compressed.
  • the first sealing edge 4 and the second sealing edge 5 thus become the axially outermost edge of the sealing element 1, so that only the sealing edges 4, 5 rest against the first part 10a or the second part 10b and thus a defined line seal is ensured.
  • Preferred materials for forming the metallic sealing element 1 according to the invention are "AR Gasket", “B096", in particular all high-temperature-resistant stainless steels and spring steels. B096 is to be understood as meaning high-alloyed nickel steels.
  • a particularly preferred material for the metallic sealing element is a NiCr19Fe19Nb5Mo3 steel (material no.
  • a material strength s in the range between 0.1 mm and 0.25 mm, especially in the range between 0.1 mm and 0.2 mm has proven.
  • FIG. 8 shows a longitudinal sectional illustration along the line A'-A 'from FIG. 7 of the metallic bellows-type sealing element according to the invention.
  • FIG. 8 shows a longitudinal sectional illustration along the line A'-A 'from FIG. 7 of the metallic bellows-type sealing element according to the invention.
  • the resilient properties of the sealing element 1, in particular in the axial direction 100 can be influenced in a targeted manner. It is also possible, in particular in the area of the arc sections 6, 7, 8, to apply an increased pressing pressure in the production method described below, and thus to achieve solidification of the material, in particular strain hardening of the material. In particular, stresses can thereby be registered specifically in the sealing element, in particular in the arc regions 6, 7, 8, and thus the resilient properties are selectively influenced.
  • a strip-shaped blank 200 is a strip-shaped blank 200, the length P and the width h '.
  • This strip-shaped blank 200 is formed around an axis parallel to a narrow side edge 201, for example, the central axis M to form a cylindrical ring and welded or soldered along the narrow side edges 201, so that a cylindrical tube blank 200 is present.
  • axial direction 300 and "radial direction 301" used below refer to a radial direction and axial direction of the production tool for the following description and may correspond to the radial direction 101 of the sealing element 1 and to the axial direction 100 of the sealing element 1, as in the previous Description used to coincide, but do not have to.
  • top refers to the location of the representations in the figures.
  • bottom refers to the location of the representations in the figures.
  • top refers to the location of the representations in the figures.
  • underside refers to the location of the representations in the figures.
  • the overall arrangement or individual arrangements with respect to a vertically upper and a vertically lower layer may also be reversed.
  • Both the forming tool 210 and the roller punch 21 1 are mounted for rotation about a central axis MW of the production tool independently of one another or coupled to one another in a double-arrow direction 212.
  • the mold 210 is formed, for example, in the manner of a hood-like die having a downwardly open die opening 213.
  • the molding tool is formed, for example, from a cover plate 214, a relief plate 215 and a holding plate 216.
  • the holding plate 216 and the relief plate 215 have a hole-like recess, which form the die opening 213 together with a blind hole-like recess of the cover plate 214.
  • the relief plate 215 has a relief web 217 which projects radially inwards into the die opening 213.
  • the die opening 213 has a minimum free inner diameter D "which is greater than an outer diameter D 2 of the annular blank 200 and further selected at least so large that the maximum inner diameter D, is greater than the largest outer diameter of each forming step of the blank 200, in particular 1% to 40%, preferably 2% to 20%, ideally 3% to 30% larger.
  • the molding tool 210 has a bottom piece 218.
  • the bottom piece 218 essentially closes the die opening 213 downwards and has a slot recess 219 which is penetrated by the roll punch 21 1.
  • the roller punch 211 has a stub shaft 220 for connection to a drive device (not shown).
  • the roller punch 21 1 expands radially outward in a mushroom-like manner and has a counter-relief 221 which corresponds to the relief plate 215 or to the relief bar 217.
  • the roller punch 21 1 is movable with respect to the mold. zeugs 210 in a radial direction 301 within the elongated hole 219 slidably. Both the mold 210 and the roller punch 2 1 are independently drivable or coupled to each other.
  • the relief ridge 217 and the counter-relief 221 form a relief 217, 221 for shaping the sealing ring.
  • a blank 200 is arranged resting on the bottom piece 218 in the die opening 213, so that the blank 200 preferably has play for the relief bar 217 and also has clearance for the roller punch 21 or counter-relief 221.
  • the position of the blank 200 in the axial direction 300 relative to the relief web 217 can be predetermined and adjusted by means of the bottom piece 218, which is optionally axially displaceable, in particular drivable axially displaceable in the axial direction 300.
  • the mold 210 is rotated in the double arrow 212 in rotation.
  • the roller punch 21 1 is also set about its central axis in rotation and radially offset in the radial direction 301 preferably motor relative to the mold 210 for the purpose of applying a contact force F radially. This takes place until the blank 200 is clamped between the relief web 217 and the counter-relief 221 and thus the blank 200, which was initially still resting on the bottom piece 2 8, rotated together with the roller punch 2 1 and the mold 210 in rotation becomes.
  • the roller punch 21 1 is subjected to a force (pressing force F), so that the blank 200, which is eccentric with respect to the central axis MW in the mold 210 at this time of the method and only by means of a portion of the mold relief 217, 221 is in contact, is formed.
  • the blank 200 is thus located during the preforming step in the circumferential direction only partially partially eccentrically offset on the mold 210 inside, in particular on the relief web 217 and the roller punch 21 1 at.
  • the roller punch 21 1 is moved back in the radial direction to the center of the molding tool 210 (to the starting position).
  • the preformed blank can thus be removed from the relief web 217 and is now removably in the die opening 213.
  • the roller punch 211 can be moved together with the bottom piece 218 in the axial direction 300 down so that the preformed blank 200 are taken from the bottom piece 218 can.
  • the diameter D, of the molding tool 210 in any case is greater than the outer diameter D 2 of the now preformed blank 200. In this way, the closed, annular blank from the die opening 213 remains removable.
  • the mold 210 is formed as a non-divisible tool, ie it must not consist of two mold halves during the manufacturing process of a sealing ring 1, so that the tool can be opened and closed. Rather, it is sufficient to make the mold 210 not divisible and the removability of the workpiece (blank or preformed / endgeformter blank) on the Di diameter choice, which must be sufficiently large, to ensure.
  • a non-divisible tool is a tool to understand, which is not divisible during operation.
  • the above-described molding tool 210 which consists in exemplary description of the cover plate 214, the relief plate 215 and the support plate 216, as such can be dismantled, for example, for maintenance or for the purpose of replacing the relief plate.
  • a dismountable tool is not a divisible tool in the sense of the above description.
  • the fully assembled molding tool 210 is a hood-like tool block firmly screwed together and not divisible during operation, with a die opening 213 open at the bottom.
  • FIG. 10a again shows what has been described above in an enlarged view on the basis of the detail X from FIG. 10.
  • the roller punch 2 for radial infeed relative to the forming tool 210 can be moved to the right starting from the position shown in FIG.
  • the forming tool is illustrated by means of a finished molding step, wherein the radial displaceability of the roller punch 21 1 relative to the mold 210 in the illustration according to FIGS. 11, 11a is perpendicular to the plane of the drawing.
  • the molding tool 210 is connected to a drive shaft stub 250, which is rotationally drivable.
  • the roller punch 21 1 is seated in a sliding link 251, wherein the sliding link 251 has grooves 252 which are slidably mounted on sliding webs 253.
  • the sliding webs 253 are part of a tool base 254, wherein the tool base 254 is bolted to the bottom piece 218.
  • roller punch 21 1 is slidable together with the bottom piece 218 in the axial direction 300, whereas the Roller temple 21 1 relative to the tool base 254 is linearly movable and in particular with respect to the mold 210 is radially displaceable.
  • the molding tool 210 differs only in that the cover plate 214, the relief plate 215 and the retaining plate 216 are designed differently in the region of the contour pointing toward the die opening 213 in relation to the preforming step.
  • the lid plate 214 and the relief plate 215 as well as the relief plate 215 and the holding plate 216 each have a relief form 280 for forming a first curved section 6 and a third curved section 8.
  • FIG. 11a shows, on the basis of the detail X according to FIG.
  • the process of loading the blank 200, forming the blank 200 and removing the blank 200 corresponds to that described in connection with the preforming step with reference to FIGS. 10 and 10a.
  • the molding tool 210 in the final molding step according to FIGS. 11 and 11a is designed as a dome-like tool (having the die opening 213, but not divisible but dismountable) during operation.
  • the finished molding of the sealing element 1 is carried out in the same or analogous manner to the preforming step by radially displacing the roller punch 21 1, applying a contact pressure F and shaping the blank 200 in the form of relief 280.
  • a calibration step may be added, if necessary, in which the sealing edges 4, 5 are produced in the required tolerance.
  • a step which is substantially identical to the preforming step and the finish-forming step according to FIGS. 10, 10a and 11, 11a offers itself.
  • the calibration step only the degree of deformation of the ready-formed blank 200, which is then already inserted in the calibration tool, is clearly minimized and relates only to the production and shaping the sealing edges 4 and 5 within the tolerance range. Further transformations are preferably not carried out in the calibration step.
  • the sealing element 1, which is now ready-made may if desired be compressed in the axial direction 100 of the sealing element 1, in order optionally to reach the predetermined height h of the sealing element within the predetermined tolerances.
  • it can also be used to facilitate assembly of the sealing element 1, to compress the sealing element 1 following the manufacturing process in the radial direction, so that an oval sealing element 1 is formed.
  • the first step is the production of the blank, wherein in particular a welding or soldering of a ring from a band-shaped sheet metal is preferred.
  • a first profile section for example an arc section 7 of the sealing element 1, is formed.
  • arc segments of the sealing element 1 are formed, for example the arc segments 6 and 8.
  • the exact geometric tolerance of the sealing edges 4 and 5 can be adjusted.
  • the preforming step may optionally be omitted and the shaping process carried out by means of a shaping step before the calibration. If necessary, even the calibration step can be omitted. len.
  • the inventive method is characterized in particular by a high-precision production of sealing elements in bellows-type design.
  • it is also easily possible to produce a succession of several arc sections, also a sequence of more than three arc sections, and thus to create a sealing, resilient sealing device.
  • machining of the free edges 2 and 3 can be omitted.
  • Tool carrier Form relief Axial direction Radial direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasket Seals (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'une bague profilée, en particulier d'une bague métallique, ainsi qu'un procédé de post-traitement d'une bague déjà profilée, un dispositif de formage pour mettre en œuvre les deux procédés et une machine-outil, en particulier un automate d'estampage et/ou de pliage comportant au moins un tel dispositif de formage. Il est proposé selon l'invention que le procédé comporte les étapes suivantes: production d'une bague cylindrique (16) pourvue d'un bord périphérique avant dans la direction axiale et d'un bord arrière (16-1, 16-2) et d'une surface extérieure formée entre les bords axiaux, placement de la bague cylindrique (16) dans une matrice (12) de telle manière que la bague soit temporairement supportée, de préférence dans la région du bord périphérique avant et du bord périphérique arrière (16-1, 16-2), formage continu par section de la bague cylindrique (16) le long de la périphérie de la bague (16) en une bague profilée (16) par exercice d'une pression dans la direction essentiellement radiale (R) au moyen d'au moins un élément de profilage (14), cet élément de profilage (14) et la matrice (12) étant déplacés l'un par rapport à l'autre, en particulier tournés l'un par rapport à l'autre et/ou déplacés linéairement l'un par rapport à l'autre.
PCT/EP2011/054210 2010-03-19 2011-03-21 Procédé et dispositif de fabrication de bagues profilées WO2011113954A1 (fr)

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DE201010003062 DE102010003062A1 (de) 2010-03-19 2010-03-19 Verfahren und Vorrichtung zur Herstellung von Profilringen
DE102010003062.7 2010-03-19
DE102011001279.6 2011-03-15
DE102011001279A DE102011001279A1 (de) 2011-03-15 2011-03-15 Metallisches balgartiges Dichtungselement und Verfahren zum Herstellen des Dichtelementes

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3141310A1 (fr) 2015-09-10 2017-03-15 Anton Kelz e. K. Procede de fabrication de bagues d'etancheite ayant un profil deforme
DE102015121459A1 (de) 2015-12-09 2017-06-14 Elringklinger Ag Montagevorrichtung für einen profilierten Ring
DE102015121811A1 (de) 2015-12-15 2017-07-06 Elringklinger Ag Profilierter Ring und Herstellungsverfahren
CN112642912A (zh) * 2020-12-17 2021-04-13 中国航发长江动力有限公司 一种金属密封环成型工装、成型设备及成型方法
CN113732138A (zh) * 2021-09-16 2021-12-03 成立航空股份有限公司 一种适用于发动机高温高压气体的金属密封环的成型方法

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US4361021A (en) * 1980-05-05 1982-11-30 United Mcgill Corporation Method and apparatus for forming angle ring flanges
EP0470830A1 (fr) * 1990-08-07 1992-02-12 Nippon Valqua Industries, Ltd. Anneau torique, métallique et creux et son procédé pour produire la même chose
DE19755391A1 (de) 1997-12-12 1999-06-24 Freudenberg Carl Fa Verfahren zur Herstellung eines Dichtringes
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EP2020541A1 (fr) 2007-08-01 2009-02-04 Carl Freudenberg KG Procédé destiné à la fabrication d'une bague d'étanchéité
DE102009033135A1 (de) 2009-07-15 2011-01-27 Elringklinger Ag Verfahren zum Herstellen von Profildichtringen

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US1842148A (en) 1927-09-23 1932-01-19 Walter B Clifford Method of making bellows folds
US2068086A (en) 1932-07-30 1937-01-19 Webster Engineering Company In Method and means for forming metallic bellows
US3019820A (en) 1957-02-28 1962-02-06 Joseph W Yowell Corrugated tubing

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GB1369312A (en) 1971-10-28 1974-10-02 Gen Motors Corp Method of making annular channelled members
DE2903779A1 (de) * 1978-02-24 1979-09-06 Gen Electric Verfahren und vorrichtung zur fuehrung einer ringstruktur waehrend ihrer fertigung
US4361021A (en) * 1980-05-05 1982-11-30 United Mcgill Corporation Method and apparatus for forming angle ring flanges
EP0470830A1 (fr) * 1990-08-07 1992-02-12 Nippon Valqua Industries, Ltd. Anneau torique, métallique et creux et son procédé pour produire la même chose
DE19755391A1 (de) 1997-12-12 1999-06-24 Freudenberg Carl Fa Verfahren zur Herstellung eines Dichtringes
US20040239053A1 (en) * 2001-10-29 2004-12-02 Rowe Gordon D. Seal
DE102004060845A1 (de) 2004-12-17 2006-06-29 Deutz Ag Mehrteilige Abgasleitung für Brennkraftmaschinen
DE102006045584A1 (de) 2006-09-27 2008-05-15 Elringklinger Ag Dichtungssystem
EP2020541A1 (fr) 2007-08-01 2009-02-04 Carl Freudenberg KG Procédé destiné à la fabrication d'une bague d'étanchéité
DE102009033135A1 (de) 2009-07-15 2011-01-27 Elringklinger Ag Verfahren zum Herstellen von Profildichtringen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3141310A1 (fr) 2015-09-10 2017-03-15 Anton Kelz e. K. Procede de fabrication de bagues d'etancheite ayant un profil deforme
DE102015217344A1 (de) 2015-09-10 2017-03-16 Anton Kelz E.K. Verfahren zur Herstellung von Dichtringen mit umgeformtem Profil
DE102015121459A1 (de) 2015-12-09 2017-06-14 Elringklinger Ag Montagevorrichtung für einen profilierten Ring
DE102015121811A1 (de) 2015-12-15 2017-07-06 Elringklinger Ag Profilierter Ring und Herstellungsverfahren
CN112642912A (zh) * 2020-12-17 2021-04-13 中国航发长江动力有限公司 一种金属密封环成型工装、成型设备及成型方法
CN113732138A (zh) * 2021-09-16 2021-12-03 成立航空股份有限公司 一种适用于发动机高温高压气体的金属密封环的成型方法

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DE112011100966B4 (de) 2023-02-02
DE112011105631A5 (de) 2015-01-15

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