EP1170070A1 - Vorrichtung zum Umformen eines Hohlprofils mittels Innenhochdruck-Umformens - Google Patents
Vorrichtung zum Umformen eines Hohlprofils mittels Innenhochdruck-Umformens Download PDFInfo
- Publication number
- EP1170070A1 EP1170070A1 EP01810590A EP01810590A EP1170070A1 EP 1170070 A1 EP1170070 A1 EP 1170070A1 EP 01810590 A EP01810590 A EP 01810590A EP 01810590 A EP01810590 A EP 01810590A EP 1170070 A1 EP1170070 A1 EP 1170070A1
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- EP
- European Patent Office
- Prior art keywords
- sleeve
- profile
- chamber
- wall
- face
- 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.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
Definitions
- the present invention relates to a device for forming a single or multi-chamber profile trained hollow profile by means of a flowable pressure medium in the Hollow profile generated internal high pressure, containing an engaging in the profile chamber, sealing stamp with a carrier part and one indirectly or directly on the Carrier part arranged, sealing the end face of a profile chamber with a bottom part and containing at least one through opening as a pressure medium supply and / or discharge channel and a method for hydroforming.
- hydroforming In so-called hydroforming, hereinafter referred to as the hydroforming process, a Hollow profile expanded by internal pressure. To do this, the end faces of the hollow profile are sealed, in order to build up excess pressure in the interior thereof by means of a pressure medium and hold. The excess pressure leads to an expansion of the hollow profile.
- the hollow profile takes the one specified by the mold in which the hollow profile was previously placed Shape. Previous sealing processes use conical metal seals, in particular steel stamps that are inserted into the hollow profile. In addition, that can Hollow profile by means of at least one stamp part acting on the end face of the workpiece be pushed. This makes it possible to widen or compress the workpiece.
- the inventor set the goal of being reliable and comparatively undemanding sealing system suitable for series production, in particular to propose for multi-chamber profiles, which has an optimal sealing ability between the pairing of hollow profile, in particular multi-chamber hollow profile, and stamp as also has improved stamp life.
- the increase in service life in series operation is intended to reduce operating costs.
- the cuff is placed on the profile chamber Rubber-elastic stamp part arranged facing the end face of the carrier part is and the bottom part is block-shaped and the outer wall of the bottom part completely or at least conically in its end section facing the profile chamber and is designed to taper towards the profile chamber and the sealing effective stop point the end of the profile chamber for forming on the conical section of the outer wall lies in the bottom part.
- the stamp according to the invention is aligned in the longitudinal axis x of the stamp, which is expedient corresponds to the direction of insertion of the stamp.
- the cuff preferably consists of one or preferably contains a limited elastic plastic.
- the cuff is there in particular from or contains in particular polyurethane.
- the bottom part of the cuff is characterized by a massively compact, block-like design.
- the Bottom part has, for example, a ratio of diameter to height of 0.5 to 6, in particular from 1.5 to 5.
- a fastening means on the free end face of the base part in the carrier part which is in direct or indirect contact with the cuff anchored and non-rotatably mounted pre-tensioning plate.
- the prestressing plate is a flat, plate-shaped element and suitably consists of a material of high strength, so that this is pre-stressed on the cuff Condition can exert a contact pressure without being significantly deformed itself.
- the biasing plate is preferably made of a ferrous or non-ferrous metal, in particular from steel.
- the biasing plate expediently has one, preferably arranged in the center Through hole, which is advantageous as a through hole for the Pressure medium supply and / or discharge serves.
- the area of the biasing plate is preferably more than 60%, in particular more than 75%, of the average cross-sectional area the cuff.
- the cuff lies with a base surface on the carrier part. Opposite on the floor surface Side of the cuff contains a free end face.
- the cuff points likewise one, preferably arranged centrally, with the through opening of the prestressing plate aligned through opening, which is the continuation of the pressure medium supply and / or discharge channel.
- the circumferential geometry of the sleeve is expediently the inner contour of the profile chamber adapted to the chamber profile.
- the bottom part of the cuff expediently has one full external wall.
- the outer wall of the bottom part can be complete or in sections parallel to the longitudinal axis x of the stamp or in the direction of free end face, i.e. taper in the direction of insertion of the punch. In the latter case it is preferred angles enclosed by the outer wall and the longitudinal axis x of the stamp are preferred less than 20 °, in particular less than 10 ° (angular degrees) and preferably greater than 0 °, in particular greater than 3 °.
- the outer wall of the bottom part includes preferably the effective sealing point on the end of the profile chamber for profile forming.
- the outer wall of the base part is complete or at least in its end section facing the profile chamber conical and Profile chamber tapered and the effective sealing point of the profile chamber front for the profile forming is on the conical section of the outer wall provided the bottom part.
- the outer wall can also be in the transition to the end face in the insertion direction of the stamp have a more tapered end section wall.
- the surfaces of the outer wall and the end section wall preferably close an acute angle of 0 ° to 45 ° (degrees of angle), in particular from 10 ° to 30 °. Due to the stronger rejuvenation of the End section wall facilitates the insertion of the stamp into the profile chamber.
- the cuff has a face against the Profile chamber arranged and pocket-shaped recess on which a, preferably fully circumferential, ring flange is surrounded.
- the pocket-shaped recess contains a recessed face.
- the cuff settles in this version consisting of a bottom part with an outer wall and one arranged on the bottom part and the pocket-shaped recess-forming ring flange with a ring flange outer wall and a ring flange inner wall directed towards the pocket-shaped recess together.
- the ring flange outer wall preferably sets at height of the ring flange approach and represents an end section wall described above.
- the ring flange can also only over sections of the entire circumference of the cuff lead, and in particular only the corner areas of the abutting outer walls of the Cover the cuff.
- the cross-sectional diameters of the ring flange preferably remain, possibly with the exception of the corner areas, over the entire scope of the Cuff constant, such that the pocket-shaped recess and with it the biasing plate essentially reproduce the cross-sectional geometry of the profile chamber.
- Ring flange and bottom part i.e. the cuff are conveniently made from one piece.
- the ring flange is expediently bead-like.
- the height of the ring flange preferably corresponds to the thickness of the prestressing plate and in particular no longer gives way as ⁇ 50% from the thickness of the tendon.
- a curved surface connects, in particular a circular curve surface with radius r, the inner ring flange with the end face.
- the radius r is preferably chosen such that a foot-like on the ring flange Forms broadening.
- the maximum diameter e corresponds to the foot-like widening preferably about the diameter d of the ring flange in its end portion.
- the maximum diameter e of the foot-like widening also preferably corresponds at least one third of the height h, in particular at least half the height h of the ring flange.
- the radius r is also preferably around half the ring flange diameter at its base.
- each an angle of Forming a corner region enclosing around 90 ° occurs in the embodiment according to the invention with high transverse forces acting on the ring flange in the named transition area no stress peaks and therefore no cracking and breaking.
- the ring flange forms in said transition area also a foot-shaped widening.
- the foot-shaped widening is here, however preferably by breaking the edges formed in the corner area by means of one or more plan or arched corner surfaces reached.
- the mutually abutting corner surfaces or the corner surface (s) abutting the inner ring flange wall or the end face Expediently form an angle of greater than 90 °, preferably greater than 110 ° and especially from greater than 130 °.
- the in turn generated by the corner surfaces obtuse-angled edges are preferably rounded.
- ring flange diameter at the base which is significantly larger, is preferably around twice to three times as large as the corresponding cross-sectional diameter d on the ring flange end face.
- the ring flange has preferred ratio of height h to diameter d at its end face from 0.5 to 3, especially from around 1 to 2.
- edges in the transition area of two ring flange sections intersecting at an angle are preferably cut and in the area of the inner ring flange rounded.
- Said transition area is preferably by a curve piece, in particular a circular curve piece with radius s, limited.
- the specified radius s corresponds or is greater than half the diameter e of the maximum foot-like broadening of the Annular flange.
- the edge can also be flat or curved using one or more Wall surfaces, which in turn with the adjacent wall surfaces have angles of greater Include as 90 °, preferably greater than 110 ° and in particular greater than 130 °, be cut.
- the obtuse angles enclosed by the wall surfaces Edges are preferably rounded.
- a biasing plate is embedded in the pocket-shaped recess of the cuff.
- the prestressing plate is preferably full and, in particular, fits snugly on the inner contours of the said recess and is therefore secured against rotation.
- the prestressing plate is by means of fastening means, preferably penetrating the cuff on a stamp part directly or indirectly adjacent to the cuff anchored so that by tightening said fasteners by the Cuff-occupied space between the preload plate and the stamp part is shortened and the cuff between the biasing plate and the opposite Stamp part is pinched or squeezed.
- the fastening means are preferably indirect or direct to the cuff anchored adjacent support part.
- a fastener are preferred Screw connections in use.
- the screw connections are preferably with Screw head and if necessary a washer on the prestressing plate on and hold this tight.
- the prestressing plate is the through opening at least by means of one in the prestressing plate and the sleeve penetrating fastening screw anchored with through hole.
- Said fastening screw can also in a stamp part directly or indirectly adjacent to the cuff, in particular screwed to the support part.
- the through hole in the mounting screw serves as a supply and / or discharge channel for the pressure medium.
- the supply and discharge of the pressure medium can be done with two or more fastening screws with a through hole, in particular through separate channels.
- the screws mentioned are preferably executed in the carrier part and through holes aligned with the through openings of the cuff and biasing plate anchored with internal thread.
- the prestressing plate does not have one described above Ring flange, with the prestressing plate placed directly on the free end face.
- the prestressing plate is provided with formations arranged on the end face, for example in shape of pins provided, which in corresponding grooves or recesses on the end face grab the cuff.
- the projections on the prestressing plate are particularly effective a perfect fit in the mentioned recesses in the cuff.
- the prestressing plate can be fastened using the fastening means described above, in particular with a through opening in the prestressing plate and the sleeve piercing fastening screw with through hole of the above Type, in a stamp part directly or indirectly adjacent to the cuff, in particular support part, be anchored or screwed.
- the biasing plate of this embodiment can also, as described above, by several Fasteners, in particular screw connections, be anchored in such a way that the prestressing plate is mounted against rotation around the longitudinal axis x of the punch and none in Recesses on the prestressing plate must be provided.
- the cuff By anchoring the prestressing plate in a directly or indirectly the prestressing plate opposing stamp part, the cuff can be sandwiched and possibly squeezed by freely selectable tightening of the fastening means become.
- the squeezing of the cuff causes a lateral, if necessary bulge-like, extension of the same.
- tensioning the prestressing plate can thus occur tolerances between the chamber and the profile chamber introduced stamp cross-sectional profile, which reduce the tightness, balanced become.
- the biasing plate in the said pocket Dimensions facing the recess may be dimensioned somewhat larger be such that by inserting the biasing plate and in particular by the Tensioning the same due to the wedge effect of the ring flange, in particular at its base, somewhat reinforced towards the outside, i.e. to the intended profile chamber walls is pushed away.
- the biasing plate is in a preferred embodiment in the direction of the support part, i.e. parallel to Longitudinal axis x, freely displaceable but arranged against rotation, the above Anchoring the prestressing plate to an outer attachment point (in the direction of the profile chamber) represents.
- the prestressing plate can thus be pressurized the pressure medium is pushed back towards the carrier part and the cuff continues to squeeze. If the pressure medium flows from the supply line into the profile chamber, in the end it strikes back next to the filling flow and exerts a thrust on the prestressing plate so that it shifts back depending on the thrust.
- the prestressing plate is preferably prestressed before the punch is inserted into the profile chamber.
- means can be provided which allow the preload plate only after inserting the stamp into its operating position tension or additionally tension.
- the friction between the cuff and profile chamber wall lowered during insertion of the stamp and the Wear can be further reduced.
- the prestressing plate is actively clamped further during the forming process.
- Tensioning is done by tightening the fastening screw (s). By tensioning the prestressing plate it is possible to seal the profile chamber ready for operation and tolerances balance in the seal.
- the invention at least one additional element as wear protection from a material that compared to the cuff is of a higher strength or wear resistance.
- the Additional element preferably consists of a wear-resistant metallic material, such as a ferrous or non-ferrous metal and especially steel. The additional element encircles the cuff in full or in part or in several parts the outer side.
- the wear protection is preferably in an area of the cuff which is in the operating position at the beginning of the forming process of the edge on the front wall of the chamber profile is applied. Thanks to this measure, the plastic becomes worn due to friction further reduced.
- the additional element is strip-shaped and is converted into a corresponding one Groove formed in the outer wall of the bottom part as a wear strip.
- This wear strip is preferably of thin cross section and can be bent to a limited extent, can therefore nestle against the adjacent inner surface of the hollow profile.
- the wear bar can be a single full part or multiple part strips, in particular in the form of corner pieces, which together cover the entire scope or sections of it.
- the wear strip like it, has receiving groove of the sleeve a tapering towards the profile chamber Cross section on.
- the wear strip forms the wall of the cuff surrounding frame, another directly to the cuff and the support member adjacent stamp part, which in turn has a corresponding surface indentation the outer wall of the cuff.
- the outer wall of the wear strip and the sleeve are preferably aligned, so that there are no shoulders or edges at the material transitions.
- a plate-like lies between the carrier part and the sleeve Intermediate part, preferably made of a metallic material, in particular steel, which has a bead-like edge on the cuff facing as wear protection having.
- the bead-like edge preferably has an inwardly inclined outer surface on, which is aligned with the tapered outer wall of the bottom part. The beaded The edge thus forms a wear strip protruding into the outer wall of the base part.
- the bead-like edge is preferably of thin cross section and can be bent to a limited extent so nestle against the adjacent inner surface of the hollow profile.
- the carrier part of all embodiments can have a larger circumference than the cuff have and thereby form a shoulder on the contact surface to the cuff, on which the profile chamber with its end face when the punch is driven into the profile chamber abuts. This serves to re-push the stamp in order to shorten or compress it of the profile.
- the sealing effect between the sleeve and the chamber profile wall is preferred reached in the area of the outer wall of the bottom part.
- the stamp contains a cuff one of the embodiment described above, the cuff indirect or is arranged directly on the carrier part and seals the end face of a profile chamber.
- the cuff contains a bottom part.
- the cuff can be on the bottom part arranged ring bottle according to one of the embodiment described above contain.
- the outer wall of the bottom part and possibly the ring flange is also designed according to one of the previously described embodiment.
- the prestressing plate is preferably not provided.
- the cuff contains at least one through opening as a pressure medium supply and / or Discharge channel.
- the through opening is preferably arranged in the center.
- the cuff also includes a reinforcement sleeve disposed about the through opening in the sleeve.
- the reinforcing sleeve is expediently a tubular or hollow cylindrical one Body and is flush or full in a first embodiment variant on the wall of the Through opening in the cuff.
- the one used after a first embodiment Reinforcing sleeve is preferably under radial prestressing of the sleeve in the area the through opening, i.e. with elastic expansion of the passage opening into it recessed or pressed tightly and tightly.
- the reinforcement sleeve surrounds the through opening integrated in the cuff.
- the reinforcement sleeve can with respect to their Connection inserted with the sleeve and / or vulcanized, glued or shrunk on his.
- the reinforcing sleeve of the second embodiment can be in the Be cast in the bottom part.
- the height of the reinforcing sleeve preferably corresponds to the height of the bottom part.
- the reinforcement sleeve is flush with an end face on the support part or one the stamp part connecting the cuff.
- the cuff is through the through holes penetrating fasteners in a direct or indirect manner anchored to the cuff stamp part, in particular in the carrier part.
- Fasteners are preferably screw connections.
- the screw connections are preferably with the screw head and possibly a washer on the end face of the cuff and / or the reinforcement sleeve and fix them.
- the reinforcing sleeve according to the invention in particular according to the first embodiment variant, can have variable outer diameters over their entire length.
- the mentioned outer diameter of the reinforcing sleeve can in particular against the carrier part increase continuously and / or by leaps and bounds. With the increase in the outside diameter the wall thickness of the reinforcing sleeve also preferably increases.
- the reinforcement sleeve can in particular have a conical or stepped outer shape.
- the inside diameter the reinforcing sleeve is preferably designed such that the screw or the screw shaft fits exactly through the reinforcement sleeve.
- a reinforcement sleeve prevents any Separation area between the screw shank and the penetrating pressure medium the sleeve in the through opening mechanically by radially acting compressive forces stressed and deformed.
- the pressure medium is highest in the border area between screw shaft and reinforcement sleeve penetrate, radial pressure occurring compensated by the reinforcing sleeve become.
- reinforcing sleeves of the second embodiment variant it is still possible Radial forces caused by penetrating pressure medium in the area of the through opening Cuff are exercised. However, the forces are through the through hole surrounding reinforcing sleeve was added and thus not passed on to the outside.
- the reinforcement sleeve is made of a material of high strength, in particular Steel, and can essentially the pressure forces exerted by penetrating pressure medium Record deformation-free.
- sealing element e.g. a sealing ring or O-ring.
- the sealing element is preferably an annular Groove opening on the end face of the reinforcement sleeve.
- a sealing element e.g. a sealing ring or O-ring.
- the sealing element is preferably in an annular groove opening sealing ring embedded in the end face of the reinforcing sleeve.
- the invention also relates to a method for hydroforming a Single or multi-chamber profile by means of a generated by a flowable pressure medium High pressure in the sealed profile space of the chamber profile using a device according to the invention, stamps in the profile chambers of the chamber profile be inserted and the cuff of the stamp the front opening of the Profile chamber seals and a pressure medium via a pressure supply line in the Profile chamber is let in.
- the method is characterized in that one of the end faces of the cuff is in contact Preload plate before or after inserting the punch into the profile chamber Fasteners squeezing the cuff in a direct or indirect manner the stamp part lying against the cuff and opposite the prestressing plate is anchored and tensioned, so that tolerances between the stamp and the chamber walls be balanced.
- the tensioning plate and the pinching pinching of the sleeve the ring flange outwards in the direction the intended profile chamber walls pressed.
- the device according to the invention is particularly suitable for internal high-pressure forming of Suitable for multi-chamber profiles.
- a stamp for each profile chamber with a corresponding one Cuff and preload plate provided as described above.
- the individual stamps for a multi-chamber profile can be performed independently of each other.
- the individual stamps for an end face of the multi-chamber profile can be via a common carrier element or other element to a jointly guided stamp arrangement be connected.
- the stamp according to the invention also has a simple structure and is accordingly inexpensive in its Purchase and easy to maintain. Thanks to the preload plate, wear can also be reduced between cuff and fastener, e.g. of screws, can be reduced because in particular the screws with their screw heads or support elements on the wear-resistant Apply the preload plate.
- the stamp 1a, b, c according to FIGS. 1, 2 and 3 contains a sleeve 2a, b, c made of a polyurethane, which is arranged on a carrier part 3a, b, c.
- the cuff 2a, b, c has a pocket-shaped recess 4a, b, c arranged on a base part 15a, b, c, which edge of an annular flange 5a, b, c and against the support part 3a, b, c through the end face 16a, b, c of the bottom part 15a, b, c is limited.
- a prestressing plate 6a, b, c made of steel is inserted in the pocket-shaped recess 4a, b, c.
- the cuff 2a, b, c and the carrier part 3a, b, c have a through opening that is aligned together 7a, b, c.
- the through opening 7a, b, c is from the direction of the biasing plate 6a, b, c a screw 8a, b, c with through hole 9a, b, c embedded, which with the screw head 10a, b, c rests on the biasing plate 6a, b, c and via a thread 11a, b, c is screwed and anchored in the carrier plate 3a, b, c.
- the cuff 2a, b, c contains an outer wall formed by the base part 15a, b, c and the ring flange 5a, b, c 19a, b, c, which tapers towards the ring flange end face 13a, b, c.
- the cuff 2a, b, c hugs the ready-to-use position of the punch 1a, b, c the walls 18 of the profile chamber 20.
- the effective sealing point on the front of the profile chamber for the forming process lies on the tapered wall section the outer wall 19a, b, c behind the ring flange 5a, b, c in the bottom part 15a, b, c.
- the ring flange inner wall 14a according to the embodiment according to FIG. 1 is essentially parallel to the longitudinal axis x of the punch.
- the edge is broken by means of a corner surface 17a, so that the ring flange 5a forms a foot-like widening towards the end face 16a with a maximum diameter e 1 .
- the maximum diameter e 1 of the foot-like widening corresponds approximately to the diameter d 1 of the ring flange 5a in the area of the ring flange end face 13a.
- the maximum diameter e 1 of the foot-like widening corresponds to approximately half the height h 2 of the ring flange 5a or is greater.
- the edges at the transition from the corner surface 17a to the ring flange inner wall 14a and to the end surface 16a are rounded and are enclosed at an angle of approximately 135 ° to the adjacent walls or surfaces.
- the edge is broken by means of a curved surface 17b, so that the ring flange 5b to the end face 16b forms a foot-like widening with a maximum diameter of e 2 .
- the radius r of the circle delimiting the curved surface corresponds approximately to half the height h 2 of the ring flange 5b or is greater.
- the maximum diameter e 2 of the foot-like widening in turn corresponds approximately to the diameter d 2 of the ring flange 5b in the area of the ring flange end face 13b.
- the maximum diameter e 2 of the foot-like widening corresponds approximately to half the height h 2 of the ring flange 5b or is greater.
- the maximum diameter e 3 of the foot-like widening corresponds approximately to the diameter d 3 of the ring flange 5c in the area of the ring flange end face 13c. Furthermore, the maximum diameter e 3 of the foot-like widening corresponds approximately to half the height h 3 of the ring flange 5c or is greater.
- a further embodiment of a stamp 1d according to the invention according to FIG. 4 contains one Cuff 2d made of a polyurethane, which is arranged on a carrier part 3d.
- the Cuff 2d essentially consists of the base part 15d and contains on its end face 16d groove or hole-shaped recesses 25.
- On the end face 16d is a biasing plate 6d made of steel, which correspond to the recesses 25 Formations 26 contains.
- the projections 26 fit precisely into the recesses 25 and secure the biasing plate 6d against rotation about the longitudinal axis of the punch x.
- the biasing plate 6d, the sleeve 2d and the carrier part 3d have one in common aligned through opening 7d.
- a screw 8d with a through hole 9d which with the screw head 10d against the biasing plate 6d and via a thread 11d is screwed and anchored in the carrier plate 3d.
- the outer wall 19d of the bottom part 15d tapers against the end face 16d.
- the biasing plate 6a, b, c, d according to Fig. 1, 2, 3 and 4 is before inserting the stamp 1a, b, c, d stretched into its operating position by the screw 8a, b, c, d, such that the sleeve 2a, b, c, d sandwiched between the biasing plate 6a, b, c, d and the carrier part 3a, b, c, d is pinched and possibly widened sideways.
- the Measure of the applied voltage and thus the degree of crushing and widening of the Cuff 2a, b, c, d depends on the existing tolerances between cuffs 2a, b, c, d and profile chamber walls 18.
- FIG. 5a shows a top view of a cuff 2h according to the embodiment of the invention.
- the same cuff 2h is in cross-sectional view through the line AA in FIG. 5b played.
- the outer wall 19h of the base part 15h describes a polygonal Floor plan, which has the cross-sectional geometry of a corresponding profile chamber 20 of a multi-chamber profile 21 corresponds (see FIG. 8).
- the through the outer wall 19h reproduced outer contour of the cuff 2h is accompanied by an annular flange 5h, which is represented in FIG. 5a by the ring flange end face 13h.
- the ring flange 5h encloses a pocket-shaped recess 4h, which in FIG End face 16h is visible.
- In a central arrangement there is a through opening 7h for a screw connection with a through hole for a pressure medium supply and / or discharge channel intended.
- the edges in the transition area of two ring flange sections intersecting at an angle are rounded in the area of the inner ring flange wall 14h.
- Said transition area is preferably delimited by a curve piece with a circular radius s.
- the circle radius s corresponds to or is greater than half the diameter e 5 of the maximum foot-like widening of the ring flange 5h.
- the diameter d 5 of the ring flange end face 13h corresponds approximately to the maximum diameter e 5 of the foot-like widening.
- the outer wall 19h of the base part 15h tapers in the direction of the ring flange end surface 13h.
- a wear protection is provided on the basis of the stamp 1e shown in FIG. 3.
- the Wear protection is in the form of a strip-shaped wear strip 30 in a groove-shaped Recess 31 in the tapered outer wall 19e of the bottom part 15e admitted.
- the outer wall of the wear strip 30 is aligned with the outer wall 19e of the bottom part 15e.
- the wear bar 30 is made of steel.
- FIG. 7 In a further embodiment of the invention according to FIG. 7 is based on a description Fig. 3 executed stamp 1f a wear protection is provided.
- a wear protection is provided between the carrier part 3f and the cuff 2f.
- the bead-like edge 36 forms wear protection on the tapered outer wall 19f of the base part 15f.
- the bead-like edge 36 has for this purpose a line running in alignment with the outer wall 19f, i.e. tapering, Outside surface 37.
- the bead-like edge 36 thus forms an in the outer wall 19f protruding wear edge of the bottom part.
- the intermediate part 35 also has one with the through opening 7f of the biasing plate 6f, the sleeve 2f and the carrier part 3f aligned through opening for the implementation of a fastening screw 8f Through hole 9f.
- the fastening means 8f anchoring the prestressing plate 4f can also be anchored in the intermediate part 35.
- the configuration of the ring flange 5e, f in FIGS. 6 and 7 and its walls 13e, f, 14e, f, 17e, f and in particular the configuration of the transition area from the ring flange wall 14e, f to the end face 16e, f and the anchoring of the sleeve 2e, f in the carrier part 3e, f corresponds to the explanations for FIG. 3. From the associated description corresponding features can be found.
- the mentioned design of the Ring flange 5f and its walls and in particular the design of the transition area of the inner ring flange and the transition area can also 1 and 2 correspond.
- the wear protection described above and its Design variants also applicable to the design variant belonging to FIG. 4.
- FIG. 9a shows a further embodiment of a stamp 1 according to the invention
- the stamp contains a sleeve 2 made of a polyurethane, which is on a carrier part 3 is arranged.
- the cuff 2 has an end face 16 and an annular flange at the edge 5 with an annular flange end face 13.
- the cuff 2 contains one by the Bottom part 15 and the ring flange 5 formed outer wall 19, which faces the end face of the ring flange 13 tapered.
- the design of the outer wall 19, the ring flange 5 and the foot-like widening corresponds to the description according to FIG. 1a.
- the cuff 2 and the carrier part 3 have a jointly aligned through opening 7 on.
- a reinforcing sleeve 40a is embedded in the through opening 7 is designed as a hollow cylinder running parallel to the longitudinal axis x of the punch.
- the reinforcement sleeve 40a is snugly inserted into the through opening 7.
- From the direction the end face 16 is a screw 8 with a through hole 9 in the through hole or embedded in the reinforcement sleeve 40a.
- the screw 8 lies with its screw head 10 on the end face of the reinforcing sleeve 40a and is via a thread 11 screwed into the carrier plate 3.
- the cuff 2 nestles against the walls in the ready position of the stamp 1 18 of the profile chamber 20.
- the effective sealing point on the front of the profile chamber for the forming process lies on the tapered wall section of the outer wall 19 behind the ring flange 5 in the base part 15.
- FIG. 9b shows an enlarged detail from the area of the reinforcing sleeve 40a according to Fig. 9a.
- the reinforcement sleeve 40b is a cylindrical, parallel to the longitudinal axis x of the punch extending sleeve and has an annular projection 41 at both ends on, which should prevent the pressure medium from getting into the separation area between the cuffs 2 and reinforcing sleeve 40b can penetrate.
- the outer surface of the reinforcing sleeve 40c is conical, whereby the outer surface tapers towards the end surface 16.
- the inner surface of the reinforcement sleeve 40c runs parallel to the longitudinal axis x of the stamp.
- the reinforcement sleeve 40d is a cylindrical, parallel to the longitudinal axis x of the punch extending sleeve formed.
- the reinforcing sleeve 40d is around the through hole 7 arranged and integrated integrally into the bottom part 15 of the sleeve 2.
- the reinforcement sleeve 40d can be cast or inserted and, if necessary, glued.
- the reinforcing sleeve 40e shown in the embodiment according to FIG. 9f is a cylindrical, sleeve running parallel to the longitudinal axis of the punch x with graduated wall thickness.
- the Gradation is step-like and arranged in the central region of the reinforcement sleeve 40e, the thinner wall of the reinforcement sleeve 40e being arranged against the end face 16 is.
- the thickening of the reinforcing sleeve 40d, f towards the carrier part 3 according to FIGS. 9d and 9f is based on the fact that the outer wall 19 of the sleeve 2 against the carrier part 3 is exposed to atmospheric pressure outside the profile chamber 20, while the outer wall 19 of the sleeve 2 starting from the attachment point of the profile chamber walls 18 lies against the end face 6 inside the profile chamber 20 and also is exposed to high pressure.
- Those acting radially in the through opening 7 Forces consequently cause greater radial deformations of the sleeve towards the carrier part 3 than towards the end face 16, which is why the reinforcing sleeve 40d, f towards the support part 3 is more solid is trained.
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
Description
Es zeigen:
- Fig. 1:
- einen Querschnitt durch einen erfindungsgemässen Stempel;
- Fig. 2:
- einen Querschnitt durch einen weiteren erfindungsgemässen Stempel;
- Fig. 3:
- einen Querschnitt durch einen weiteren erfindungsgemässen Stempel;
- Fig. 4:
- einen Querschnitt durch eine weiteren erfindungsgemässen Stempel;
- Fig. 5a:
- eine Draufsicht der Manschette eines erfindungsgemässen Stempels;
- Fig. 5b:
- einen schematischen Querschnitt durch Fig. 5a entlang der Linie A - A;
- Fig. 6:
- einen Querschnitt durch einen erfindungsgemässen Stempels mit Verschleissschutz;
- Fig. 7:
- einen Querschnitt durch einen weiteren erfindungsgemässen Stempel mit Verschleissschutz;
- Fig. 8:
- einen Querschnitt durch ein Mehrkammerprofil;
- Fig. 9a:
- einen Querschnitt durch einen erfindungsgemässen Stempel mit Verstärkungshülse;
- Fig. 9b:
- einen vergrösserten Ausschnitt aus dem Bereich der Verstärkungshülse gemäss Fig. 9a;
- Fig. 9c-f:
- einen Ausschnitt durch einen erfindungsgemässen Stempel im Querschnitt mit verschiedenen Verstärkungshülsen.
Claims (21)
- Vorrichtung zum Umformen eines als Ein- oder Mehrkammerprofil (21) ausgebildeten Hohlprofils mittels durch ein strömbares Druckmedium im Hohlprofil erzeugten Innenhochdrucks, enthaltend einen in die Profilkammer (20) eingreifenden, abdichtenden Stempel (1a) mit einem Trägerteil (3a) und einer mittelbar oder unmittelbar auf dem Trägerteil (3a) angeordneten, die Stirnseite einer Profilkammer (20) abdichtenden Manschette (2a) mit einem Bodenteil (15a) und enthaltend wenigstens eine Durchgangsöffnung (7a) als Druckmedium-Zu- und/oder Abfuhrkanal (9a),
dadurch gekennzeichnet, dass
die Manschette (2a) ein auf der Profilkammer (20) zugewandten Stirnfläche des Trägerteils (3a) angeordnetes gummielastisches Stempelteil ist und das Bodenteil (15a) blockartig ausgestaltet ist und die Aussenwandung (19a) des Bodenteils (15a) vollständig oder wenigstens in seinem der Profilkammer (20) zugewandten Endabschnitt konisch und zur Profilkammer (20) hin verjüngend ausgebildet ist und die dichtungswirksame Anschlagstelle der Profilkammerstirnseite für die Umformung auf dem konischen Abschnitt der Aussenwandung (19a) im Bodenteil (15a) liegt. - Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Verjüngung der Aussenwandung (19a) des Bodenteils (15a) zu einer Stempellängsachse x einen Winkel von grösser 0°, vorzugsweise von grösser 3° und von kleiner 20°, vorzugsweise von kleiner 10°, einschliesst.
- Vorrichtung nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass auf der freien Stirnfläche (16a) des Bodenteils (15a) eine über Befestigungsmittel (8a) in dem mittelbar oder unmittelbar an der Manschette (2a) anliegenden Stempelteil (3a) verankerte und die Manschette (2a) vorspannende, verdrehsicher gelagerte Vorspannplatte (6a) angebracht ist.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Befestigungsmittel Vorspannplatte (6a) und Manschette (2a) durchdringend in einem der Vorspannplatte (6a) entgegengesetzt liegenden, vorzugsweise unmittelbar an der Manschette (2a) anliegenden, Stempelteil, insbesondere Trägerteil (3a), verankert sind und die Vorspannplatte (6a) unter quetschender Einengung der Manschette (2a) an das Stempelteil fixieren.
- Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Vorspannplatte (6a) mittels einer oder mehreren die Manschette (2a) durchstossenden, die Vorspannplatte über Schraubenköpfe (10a) oder Unterlagselemente fixierenden und im Trägerteil (3a) verschraubten Befestigungsschrauben (8a) verankert ist.
- Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Vorspannplatte (6a) wenigstens mittels einer die Durchgangsöffnung (7a) durchstossenden und im Trägerteil (3a) verschraubten Befestigungsschraube (8a) mit Durchgangsbohrung (9a) verankert ist und die Durchgangsbohrung (9a) zugleich Druckmedium-Zu- und/oder Abfuhrkanal ist.
- Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass in der Manschette (2) eine die Durchgangsöffnung (7) umgebende Verstärkungshülse 40a angeordnet ist und die Durchgangsöffnung (7) durchgreifende Befestigungsmittel die Manschette (2) an ein der Manschette anliegendes Stempelteil (3) fixieren und die Verstärkungshülse (40a) allfällige durch das Druckmedium in der Durchgangsöffnung (7) radial gegen aussen ausgeübte Deformationskräfte aufnimmt.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Verstärkungshülse (40a) bündig und dichtend an der Wandung der Durchgangsöffnung (7) in der Manschette (2) anliegt und vorzugsweise unter radialer Vorspannung der Manschette (2) im Bereich der Durchgangsöffnung (7), d.h. unter elastischer Ausweitung der Durchgangsöffnung (7) in diese eingelassen oder gepresst ist.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Verstärkungshülse (40d) die Durchgangsöffnung (7) umschliessend integral in die Manschette (2) eingelassen ist und vorzugsweise in die Manschette (2) eingegossen ist.
- Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Manschette (2) wenigstens mittels einer die Durchgangsöffnung (7) durchstossenden und im Trägerteil (3) verschraubten Befestigungsschraube (8) mit Durchgangsbohrung (9) verankert ist und die Durchgangsbohrung (9) zugleich Druckmedium-Zu- und/oder Abfuhrkanal ist.
- Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Manschette (2a) an der Profilkammer (20) zugewandten Stirnfläche (16a) eine stirnseitig an das Bodenteil (15a) anschliessende und von einem Ringflansch (5a) voll- oder teilumfänglich randseitig umschlossene taschenförmige Ausnehmung (4a) enthält.
- Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass der Ringflansch (5a) ein bevorzugtes Verhältnis von Höhe h1 zu Durchmesser d1 an seiner Endfläche von 0,5 bis 3, insbesondere von rund 1 bis 2 aufweist.
- Vorrichtung nach einem der Ansprüche 11 bis 12, dadurch gekennzeichnet, dass die Kanten im Übergangsbereich zwischen Ringflanschinnenwandung (14a) und Stirnfläche (16a) der Manschette (2a) gebrochen und/oder gerundet sind.
- Vorrichtung nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, dass der Ringflansch (5a) im Übergangsbereich zur Stirnfläche (16a) in der taschenförmigen Ausnehmung (4a) eine fussartige Verbreiterung aufweist und der maximale Durchmesser e1 der fussartigen Verbreiterung wenigstens einem Drittel, vorzugsweise wenigstens der Hälfte der Gesamthöhe h1 des Ringflansches (5a) entspricht.
- Vorrichtung nach einem der Ansprüche 11 bis 14, dadurch gekennzeichnet, dass die Ringflanschinnenwandung (14a) über eine Kurvenfläche, vorzugsweise eine Kreiskurvenfläche mit einem Radius r, in die Stirnfläche (16a) übergeht.
- Vorrichtung nach einem der Ansprüche 11 bis 15, dadurch gekennzeichnet, dass im Übergangsbereich zwischen Ringflanschinnenwandung (14a) und Stirnfläche (16a) eine oder mehrere eine fussartige Verbreiterung ausbildende Eckflächen (17a) vorgesehen sind und die den Eckflächen (17a) anstossenden Wandungen mit diesen einen Winkel von grösser als 90°, vorzugsweise grösser als 110°, und insbesondere grösser als 130° einschliessen.
- Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Vorspannplatte (6a) in eine wenigstens in ihrer geometrischen Form, vorzugsweise in ihrer geometrischen Form und Abmessung korrespondierende taschenförmige Ausnehmung der Manschette quer zur Stempellängsachse x verdrehsicher eingebettet ist und die Vorspannplatte (6a) von einem satt anliegenden Ringflansch (5a) umgeben ist.
- Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Vorspannplatte (6d) in nutförmige Ausnehmungen (25) der Manschette (2d) passgenau eingreifende Anformungen (26) als Verdrehsicherung enthält.
- Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Vorspannplatte (6a) in Stempellängsachsrichtung x frei beweglich befestigt ist und die Befestigungsmittel (8a) einen äusseren, zur Profilkammer (20) gerichteten Anschlag der Vorspannplatte (6a) ausbilden, derart dass die Vorspannplatte (6a) während des Umformvorganges durch Druckbeaufschlagung des Druckmediums unter Erhöhung des Quetschdruckes auf die Manschette (2a) gegen das Trägerteil (3a) gepresst werden kann.
- Verfahren zum Umformen eines Ein- oder Mehrkammerprofils (21) mittels eines durch ein strömbares Druckmedium erzeugten Innenhochdrucks im abgedichteten Profilraum des Kammerprofils (21) unter Verwendung einer Vorrichtung nach Anspruch 1, wobei Stempel (1a) in die Profilkammern (20) des Kammerprofils (21) eingeführt werden und eine Manschette (2a) des Stempels (1a) die stirnseitige Öffnung der Profilkammer (20) dichtend abschliesst und ein Druckmedium über eine Druckzufuhrleitung (7a) in die Profilkammer (20) eingelassen wird,
dadurch gekennzeichnet, dass
eine der Stirnfläche (16a) der Manschette (2a) anliegende Vorspannplatte (6a) vor oder nach Einführen des Stempels (1a) in die Profilkammer (20) mittels Befestigungsmittel (8a) unter Quetschung der Manschette (2a) in einem mittelbar oder unmittelbar der Manschette (2a) anliegenden und der Vorspannplatte (6a) entgegengesetzt liegenden Stempelteil (3a) verankert und gespannt wird, so dass Toleranzen zwischen Stempel (1a) und den Kammerwänden (18) ausgeglichen werden. - Verfahren nach Anspruch 20, dadurch gekennzeichnet, dass durch das Spannen der Vorspannplatte und quetschende Einklemmen der Manschette (2a) der Ringflansch (5a) und/oder die Aussenwandung (19a) der Manschette (2a) nach aussen in Richtung der vorgesehenen Kammerwände (18) gedrückt wird.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20010810590 EP1170070B1 (de) | 2000-07-05 | 2001-06-18 | Vorrichtung zum Umformen eines Hohlprofils mittels Innenhochdruck-Umformens |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00810590 | 2000-07-05 | ||
EP00810590A EP1170069A1 (de) | 2000-07-05 | 2000-07-05 | Vorrichtung zum Umformen eines Hohlprofils mittels Innenhochdruck-Umformens |
EP20010810590 EP1170070B1 (de) | 2000-07-05 | 2001-06-18 | Vorrichtung zum Umformen eines Hohlprofils mittels Innenhochdruck-Umformens |
Publications (2)
Publication Number | Publication Date |
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EP1170070A1 true EP1170070A1 (de) | 2002-01-09 |
EP1170070B1 EP1170070B1 (de) | 2004-12-01 |
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EP20010810590 Expired - Lifetime EP1170070B1 (de) | 2000-07-05 | 2001-06-18 | Vorrichtung zum Umformen eines Hohlprofils mittels Innenhochdruck-Umformens |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1388381A1 (de) * | 2002-08-08 | 2004-02-11 | Schuler Hydroforming GmbH & Co. KG | Vorrichtung zur Innenhochdruck-Umformung von Hohlkörpern |
DE102004024574A1 (de) * | 2004-05-18 | 2005-12-15 | Daimlerchrysler Ag | Vorrichtung zum Innenhochdruckumformen eines Hohlkörpers |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2245887A (en) * | 1940-05-14 | 1941-06-17 | Gustavus A Wikander | Stopper for laundry tubs, washbasins, and other receptacles |
DE1068206B (de) * | 1955-06-17 | 1959-11-05 | Flexonics Corporation, Maywood, 111. (V. St. A.) | Verfahren zum Herstellen eines gekrümmten Rohrformstückes |
EP0225573A2 (de) * | 1985-12-02 | 1987-06-16 | Aluminum Company Of America | Abdichtungsvorrichtung für Hohlkörperenden |
US5038830A (en) * | 1986-06-27 | 1991-08-13 | Hydrotreat, Inc. | Pipe and sealing device |
DE19905849C1 (de) * | 1999-01-07 | 2000-04-20 | Alusuisse Lonza Services Ag | Vorrichtung zum Umformen eines Hohlprofils od. dgl. Werkstückes auf dem Wege dem Innenhochdruck-Umformens |
-
2001
- 2001-06-18 EP EP20010810590 patent/EP1170070B1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2245887A (en) * | 1940-05-14 | 1941-06-17 | Gustavus A Wikander | Stopper for laundry tubs, washbasins, and other receptacles |
DE1068206B (de) * | 1955-06-17 | 1959-11-05 | Flexonics Corporation, Maywood, 111. (V. St. A.) | Verfahren zum Herstellen eines gekrümmten Rohrformstückes |
EP0225573A2 (de) * | 1985-12-02 | 1987-06-16 | Aluminum Company Of America | Abdichtungsvorrichtung für Hohlkörperenden |
US5038830A (en) * | 1986-06-27 | 1991-08-13 | Hydrotreat, Inc. | Pipe and sealing device |
DE19905849C1 (de) * | 1999-01-07 | 2000-04-20 | Alusuisse Lonza Services Ag | Vorrichtung zum Umformen eines Hohlprofils od. dgl. Werkstückes auf dem Wege dem Innenhochdruck-Umformens |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1388381A1 (de) * | 2002-08-08 | 2004-02-11 | Schuler Hydroforming GmbH & Co. KG | Vorrichtung zur Innenhochdruck-Umformung von Hohlkörpern |
DE102004024574A1 (de) * | 2004-05-18 | 2005-12-15 | Daimlerchrysler Ag | Vorrichtung zum Innenhochdruckumformen eines Hohlkörpers |
DE102004024574B4 (de) * | 2004-05-18 | 2007-05-10 | Daimlerchrysler Ag | Vorrichtung zum Innenhochdruckumformen eines Hohlkörpers |
Also Published As
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EP1170070B1 (de) | 2004-12-01 |
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