EP1077780B1 - Gebaute aufweitlanze - Google Patents
Gebaute aufweitlanze Download PDFInfo
- Publication number
- EP1077780B1 EP1077780B1 EP99920838A EP99920838A EP1077780B1 EP 1077780 B1 EP1077780 B1 EP 1077780B1 EP 99920838 A EP99920838 A EP 99920838A EP 99920838 A EP99920838 A EP 99920838A EP 1077780 B1 EP1077780 B1 EP 1077780B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring
- sealing
- accordance
- lance
- expansion
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
- B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material
Definitions
- the invention relates to a spreading lance according to the preamble of claim 1.
- the support ring can extrude itself, after which the O-ring is extruded. A long-term use ability the expansion lance is thus not given.
- the O-rings are here not primarily seal, but as a pressure transmitter for the Support body serve and this to the pipe inside to Application of the sealing effect to be pressed.
- the form in area 9 must be the same size like the joining pressure in the expansion area, otherwise the O-ring in the underlying hole is pressed. Is the joining pressure larger, the hole under the O-ring acts like a Punching ring that destroys the O-ring.
- the hole under the O-ring acts at the usual Pressure rise rates of about 2000 bar / sec as a nozzle which blasts the O-ring with the pressurized fluid. Since the support body is charged directly with the pressure medium becomes and the force resulting from both pressure forces a having axial component, the support body in Gap between spacer sleeve and hollow profile either slightly jam or even extrude into it.
- the invention is based on the object, a generic Expanding lance to the effect that a Long-term use of the lance under warranty Reliable sealing effect of the sealing arrangement achieved becomes.
- the abrasion-resistant material contributes of the sealing ring to ensure long-term use the Aufweitlanze essential with at. Because of the axially immovable stop is at full expansion pressure the elastomer ring is compressed axially, after which the axially unyielding, However, radially elastic support ring through the radially swelling shoulder until it is pressed the hollow profile inside is radially expanded.
- a built Aufweitlanze 1 is shown, with a rectilinear tubular tubular profile after inserting the expanding lance 1 and suitable positioning within the hollow profile by exerting a fluidic hydroforming partially be widened can, for example, cams on the hollow section to form to add a camshaft.
- the expanding lance 1 includes a rod-shaped seal carrier 2, which is releasably attached to a carrier mount, preferably screwed.
- the seal carrier 2 has a centrally extending axial inlet bore 3, from the from at certain intervals, to the placement of the mating cam are adapted to the hollow profile, transverse bores 4 branches, the on its lateral surface 5 to the point of forming hollow profile expansion.
- To the inlet bore 3 is on the one hand a fluid high pressure source for charging the inlet bore 3 and thus the Aufweitstelle connected with a pressurized fluid.
- Zulaufbohrung 3 formed as a blind hole, which in an upsetting 6 of the seal carrier 2, the end thereof forms, leaks.
- the upsetting 6 serves as an end stop for a seal assembly 7, in a simple manner can be pushed onto the seal carrier 2 without the Seals of the arrangement 7 over charge with acceptance of a Overstretch damage to the seal.
- the seal assembly 7 includes sealing rings 8, as particularly 2, spacers 9, intermediate sleeves 10 and positioning stops 11.
- the sealing rings 8 are each provided as a pair of sealing rings and at the point of Aufweitlanze 1 arranged at the widening of the hollow section should be done.
- the spaced apart sealing rings 8 of the sealing ring pair limit high pressure tight axially on both sides of the Aufweitstelle, so that between the sealing rings 8 forms an annular expansion chamber 12.
- the expansion chamber 12 is each with an intermediate sleeve 10 almost filled, the radial bores 13, which adjoins the mouth openings of the transverse bores 4 of the expanding lance 1 in aligned with the holes 4 Connect way.
- Page 14 On the opposite side of the intermediate sleeve 10 Page 14 are the sealing rings 8 from an axial stop, which is designed as a spacer sleeve 9, supported. This serves at the same time as a line filler along the Spread lance 1 to position the sealing rings 8 axially.
- the spacer sleeve 9 in turn is supported on the other hand axially on a positioning stop 11, which on the seal carrier 2 is fixed axially immovable.
- the stop 11 begins the axial force on the one hand from the in the expansion chamber 12 exerted internal high pressure and on the other of frictional entry forces during insertion the expanding lance 1 in the hollow profile, so that no axial displacement of the sealing rings 8 and the spacer sleeves 9 occurs under the action of the pressure force.
- the positioning stop 11, not necessarily every spacer sleeve.
- the upsetting 6 can also be of such a trained Positioning stop 11 to be replaced, causing the Seal carrier 2 with less production engineering effort namely formed as a simple cylindrical rod can be.
- the inlet hole 3 is then to guarantee the tightness of the expansion lance 1 in its end, So welded in the region of the positioning stop 11.
- the sealing rings 8 are with respect to the hollow profile inside diameter formed with oversize on the outer diameter, so that when inserting the Aufweitlanze 1 in the hollow section Immediately by having preload on the inside of the Hollow profiles adjacent sealing rings 8 given a sealing effect is. Furthermore, the sealing rings 8 each of two components, the first component of a Abriebarmen high-pressure resistant elastomer ring 19 is formed which abuts against the lateral surface 5 of the seal carrier 2.
- the elastomer ring 19 is thus axially from the internal high pressure fully acted upon and completely elastically deformable. It preferably consists of a hydrolysis resistant thermoplastic polyurethane elastomer, being less Abrasion when inserted and pulled out in or out the hollow profile guarantees a high long-term stability. Also conceivable is the formation of the elastomeric ring 19 of a textile material, in particular a Aramidgeflecht.
- the elastomeric ring 19 has a radially from its outer circumference outwardly projecting circumferential sealing lip 20, the has a much larger outer diameter than the Inner diameter of the hollow profile to be expanded.
- the radial outwardly projecting splayed sealing lips 20 of the both sealing rings 8 of the sealing ring pair are inclined towards each other, whereby when inserting the Aufweitlanze 1 in the Hollow profile, the sealing lips 20 of this strong to the seal carrier 2 are bent out, so that the bias the sealing rings 8 in the hollow profile and thus the sealing effect is increased.
- the sealing lips 20 bridge the widening between gap in the expansion Expanding lance 1 and hollow profile by elastic springback in their initial position corresponding to the non-use position the expanding lance 1.
- the inclination of the sealing lips 20 continues to provide the advantage that when exercising a hydroforming the Lips 20 radially to the inside of the hollow profile in addition be pressed with an extremely high force, causing the a the sealing ability of the seal assembly 7 considerably and on the other to avoid a column extrusion of the sealing ring 8 in the gap between the non-widening area of the expansion lance 1 and the hollow profile contributes significantly.
- the outer edge of the bottom 23 of the sealing lip 20 forms.
- the Depth of the annular groove 22 may not be sized so large that a Risk of cracking of the sealing ring 8 occurs, but large enough be to ensure sufficient elasticity of the sealing lip 20.
- groove depths have between 2 and 2.3 mm turned out to be particularly favorable.
- the groove bottom 24 is otherwise rounded for reasons of voltage engineering, according to which the notch stress of the annular groove 22 is lowered and the strength of the sealing ring 8 is increased.
- the elastomeric ring 19 further has one of its inner circumference radially encircling circumferential sealing lip 25, which bears against the seal carrier 2 under prestress, whereby it is avoided that the high pressure Fluid creeps under the sealing ring 8 and thus leakage forms.
- the sealing effect is thus by the sealing lip 25 elevated.
- the sealing lips 20 are the radially inwardly projecting sealing lips 25 of the two Sealing rings 8 of the sealing ring pair are inclined towards each other, whereby the sealing lips 25 at high pressure very strong the seal carrier 2 are pressed and the sealing effect even better.
- the sealing lip 25 has a circumferentially beveled radially inwardly facing bevel 26, which for the insertion direction the expanding lance 1 past sealing ring 8 of the sealing ring pair threading onto the seal carrier 2 facilitates and kinking of the sealing lip 25 when threading prevented and for in Eischubides the expanding lance 1 previous seal 8 a kinking when Pulling off the seal carrier 2, for example, for the purpose of a Interchange prevents.
- the elastomer ring 19 is on the nearest Transverse hole 4 side 14 facing away from a circumferential cross-section rectangular shoulder 27 formed on the in one Press fit a the above-mentioned second component of Sealing ring 8 forming support ring 28 is placed.
- the supported support ring 28 consists of high pressure resistant Material, is radially elastic and has in the axial direction a very high tensile strength.
- As a material for the Support ring 28 is conceivable bronze or a spring steel.
- the use of a linear aromatic polymer or a polyoxylenemethylene plastomer result.
- the shoulder 27 of the sealing ring 8 is thus from Support ring 28, the seal carrier 2 and the adjacent spacer sleeve 9 enclosed.
- the support ring 28 is in axial Direction very stiff and therefore can not be pushed away or even extrude yourself. By the support ring 28 is thus a reliable sealing effect of the sealing arrangement. 7 achieved and a long-term operational capability of Aufweitlanze 1 guaranteed.
- the spacer sleeve 9 from the shoulder 27 of the elastomeric ring 19 is the sleeve 9 with snug fit on the seal carrier 2 arranged.
- the two sealing rings 8 of the sealing ring pair from each other spaced and axially supporting intermediate sleeve 10 fills the expansion chamber 12 as mentioned almost off, as possible little pressure fluid when pulling out the expanding lance 1 from to lose the hollow profile after expansion.
- the intermediate sleeve 10 at both End faces provided externally with a chamfer 29.
- a flexible elastic scraper ring 31 attached, preferably glued, which has a larger diameter than the inner diameter of the Hollow profile.
- the scraper ring 31 serves to displace Particles, shavings and loose burrs in the hollow profile, so that the sealing rings 8 in their position of use in the hollow profile find a clean plant, which for the sealing ability the sealing arrangement 7 is important. Furthermore do not scratch the sealing rings 8 over the mentioned small particles and thereby take no damage, so that also from this page on the long-term use of the Aufweilanze 1 is contributed.
- the seal carrier 2 is otherwise made of a tempered steel with high yield strength and high tensile strength at the same time high elongation at break, so that the swelling axial load is reduced by Druckauf- and -abbau, the tensile strength of the seal carrier 2, especially if this is a very small Diameter, degrades in the course of its use. This is then so small that the seal carrier 2 breaks. The sealing effect would be canceled in this case. The remuneration is decisively counteracted by this harmful effect.
- the seal carrier 2 produced from originally normal tool steel for example 60 WCrV 7) is subjected to a suitable heat treatment for this purpose.
- the steel is austenitized in the oven at 880 ° C with a heat exposure time of about 25 minutes and then cooled to room temperature from the oven heat in oil. Subsequently, the steel is tempered for 2 hours at 600 ° C, after which it reaches a yield strength of about 1340 N / mm 2 and a tensile strength of about 1410 N / mm 2 with an elongation at break A5 of about 8%.
- a tempering steel such as CrNiMo 8, which is highly ductile. Due to the remuneration of the seal carrier 2, it is also possible to use very stiff sealing elements of the seal arrangement 7, such as metallic spacers 9 and support rings 28, since bending of the seal carrier 2 does not occur during the expansion.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
- Joints With Sleeves (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Joints Allowing Movement (AREA)
Description
Claims (17)
- Gebaute Aufweitlanze (1) zum partiellen Aufweiten eines geradlinig verlaufenden rohrförmigen Hohlprofiles durch Ausüben eines fluidischen Innenhochdruckes, mit einem stabförmigen an einer Trägeraufnahme lösbar angebrachten Dichtungsträger (2), mit einer aus wenigstens zwei voneinander durch eine Zwischenhülse (10) beabstandeten hinsichtlich des Hohlprofilinnendurchmessers mit Übermaß am Außendurchmesser ausgebildeten Dichtringen (8) und mindestens einer zwischen dem Dichtringpaar und der Trägeraufnahme gelegenen Distanzhülse (9) bestehende auf dem Dichtungsträger (2) angeordneten Dichtungsanordnung (7), welcher eine mit einer Fluidhochdruckquelle verbundene axiale Zulaufbohrung (3) sowie zumindest eine von der Zulaufbohrung (3) abzweigende und zwischen dem Dichtringpaar ausmündende Querbohrung (4) aufweist, und mit einer aufnahmefernen axialen Endabstützung der Dichtungsanordnung (7)
dadurch gekennzeichnet, daß die Dichtringe (8) jeweils aus zwei Komponenten bestehen, wobei die erste Komponente von einem abriebarmen hochdruckfesten Elastomerring (19) gebildet ist, der an der Mantelfläche (5) des Dichtungsträgers (2) vom Innenhochdruck axial elastisch verformbar anliegt, und wobei die zweite Komponente von einem hochdruckfesten Stützring (28) gebildet ist, der radial elastisch ist und axial eine sehr hohe Zugfestigkeit besitzt, und daß der Elastomerring (19) auf seiner der nächstliegenden Querbohrung (4) abgewandten Seite (14) eine umlaufende Schulter (27) aufweist, auf der der Stützring (28) gelagert ist und die von dem Stützring (28), dem Dichtungsträger (2) und einem auf diesem angeordneten axialen Anschlag umschlossen ist. - Aufweitlanze nach Anspruch 1,
dadurch gekennzeichnet, daß der Elastomerring (19) aus einem hydrolysebeständigen thermoplastischen Polyurethanelastomer besteht. - Aufweitlanze nach Anspruch 1,
dadurch gekennzeichnet, daß der Stützring (28) aus einem linearen aromatischen Polymer oder einem Polyoxylenmethylenplastomer besteht. - Aufweitlanze nach Anspruch 1,
dadurch gekennzeichnet, daß der axiale Anschlag von einer Distanzhülse (9) gebildet ist, die mit Paßsitz auf dem Dichtungsträger (2) angeordnet ist. - Aufweitlanze nach Anspruch 1,
dadurch gekennzeichnet, daß die Distanzhülse (9) auf ihrer dichtringabgewandten Seite an einem am Dichtungsträger (2) axial fixierten Positionierungsanschlag (11) axial abgestützt ist. - Aufweitlanze nach Anspruch 5,
dadurch gekennzeichnet, daß der Positionierunganschlag (11) aus zwei Ringhälften (15,16) besteht, die in einer Ringnut (17) des Dichtungsträgers (2) unter Bildung eines Vollringes aufgenommen sind und aus der Ringnut (22) radial herausragen, wobei sie an ihrem Umfang durch einen gummielastischen Ring (18) zusammengehalten sind. - Aufweitlanze nach Anspruch 1,
dadurch gekennzeichnet, daß der Elastomerring (19) eine von seinem Außenumfang radial nach außen abragende umlaufende Dichtlippe (20) aufweist, die einen größeren Außendurchmesser besitzt als der Innendurchmesser des aufzuweitenden Hohlprofiles. - Aufweitlanze nach Anspruch 7,
dadurch gekennzeichnet, daß die radial nach außen abragenden Dichtlippen (20) der beiden Dichtringe (8) des Dichtringpaares einander zugeneigt sind. - Aufweitlanze nach Anspruch 7,
dadurch gekennzeichnet, daß die Dichtlippe (20) des in Einschubrichtung der Aufweitlanze (1) zurückliegenden Dichtringes (8) des Dichtringpaares auf Seiten des zuvorgelegenen Dichtringes (8) eine umlaufend angeschrägte radial nach außen weisende Fase (21) besitzt. - Aufweitlanze nach Anspruch 7,
dadurch gekennzeichnet, daß der Elastomerring (19) an seiner dem Stützring (28) abgewandten Seite eine in axialer Richtung offene Umfangsnut (22) aufweist, deren obere Flanke die Unterseite (23) der Dichtlippe (20) bildet. - Aufweitlanze nach Anspruch 10,
dadurch gekennzeichnet, daß die Nut (22) zwischen 2 und 2,3 mm tief ist. - Aufweitlanze nach Anspruch 10,
dadurch gekennzeichnet, daß die Nut (22) kerbförmig ausgebildet ist, wobei der Nutgrund (24) verrundet ist. - Aufweitlanze nach Anspruch 1,
dadurch gekennzeichnet, daß der Elastomerring (19) eine von seinem Innenumfang radial nach innen abragende umlaufende Dichtlippe (20) aufweist, die am Dichtungsträger (2) unter Vorspannung anliegt. - Aufweitlanze nach Anspruch 13,
dadurch gekennzeichnet, daß die radial nach innen abragenden Dichtlippen (25) der beiden Dichtringe (8) des Dichtringpaares einander zugeneigt sind. - Aufweitlanze nach Anspruch 13,
dadurch gekennzeichnet, daß die Dichtlippe (25) des in Einschubrichtung der Aufweitlanze (1) zurückliegenden Dichtringes (8) des Dichtringpaares auf Seiten des zuvorgelegenen Dichtringes (8) eine umlaufend angeschrägte radial nach innen weisende Fase (26) besitzt. - Aufweitlanze nach Anspruch 1,
dadurch gekennzeichnet, daß an dem Dichtungsträger (2) in Einschubrichtung der Aufweitlanze (1) der Dichtungsanordnung (7) vorgelagert ein biegeelastischer Abstreifring (31) angebracht ist, der einen größeren Durchmesser aufweist als der Innendurchmesser des Hohlprofils. - Aufweitlanze nach Anspruch 1,
dadurch gekennzeichnet, daß der Dichtungsträger (2) aus einem vergüteten Stahl besteht.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19821807A DE19821807C2 (de) | 1998-05-15 | 1998-05-15 | Gebaute Aufweitlanze |
DE19821807 | 1998-05-15 | ||
PCT/EP1999/002990 WO1999059747A1 (de) | 1998-05-15 | 1999-05-03 | Gebaute aufweitlanze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1077780A1 EP1077780A1 (de) | 2001-02-28 |
EP1077780B1 true EP1077780B1 (de) | 2003-04-16 |
Family
ID=7867861
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99920838A Expired - Lifetime EP1077780B1 (de) | 1998-05-15 | 1999-05-03 | Gebaute aufweitlanze |
Country Status (5)
Country | Link |
---|---|
US (1) | US6948709B1 (de) |
EP (1) | EP1077780B1 (de) |
DE (2) | DE19821807C2 (de) |
ES (1) | ES2196804T3 (de) |
WO (1) | WO1999059747A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10338387B4 (de) * | 2003-08-21 | 2009-01-15 | Daimler Ag | Aufweitlanze zum partiellen Aufweiten eines rohrförmigen Hohlprofiles |
DE10338385B4 (de) * | 2003-08-21 | 2006-09-21 | Daimlerchrysler Ag | Dichtungsanordnung |
DE10338348B3 (de) * | 2003-08-21 | 2005-04-07 | Daimlerchrysler Ag | Aufweitlanze |
EP1604752B1 (de) * | 2004-06-03 | 2008-03-19 | Balcke-Dürr GmbH | Hydraulisches Aufweitverfahren und Vorrichtung dafür |
DE102007062235B4 (de) | 2007-12-21 | 2016-11-17 | Thorsten Gößling | Verfahren und Vorrichtung zum Fügen gebauter Hohlwellen |
DE102013107284A1 (de) | 2012-10-29 | 2014-04-30 | Thyssenkrupp Presta Teccenter Ag | Verfahren zum Zusammenbau eines Motormoduls |
DE102013016187A1 (de) | 2013-09-28 | 2014-07-17 | Daimler Ag | Montagewerkzeug und -verfahren für eine Sonde |
CN104607525B (zh) * | 2015-01-19 | 2016-04-13 | 西安交通大学 | 一种管材下料的表面环形槽根部的液体内高压起裂方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3627336A (en) * | 1967-06-27 | 1971-12-14 | Gordon C Lawson | Extrusion resistant pressure ring assembly for slidably telescoping members |
US4467630A (en) | 1981-12-17 | 1984-08-28 | Haskel, Incorporated | Hydraulic swaging seal construction |
US4608739A (en) * | 1983-04-06 | 1986-09-02 | Big-Inch Marine Systems, Inc. | Connector of and sealing of tubular members |
US5388814A (en) * | 1987-05-21 | 1995-02-14 | Emitec Gesellschaft Fur Emissionstechnologie Mbh | Device for hydraulic expansion |
DE3716986A1 (de) * | 1987-05-21 | 1988-12-15 | Emitec Emissionstechnologie | Vorrichtung zum hydraulischen aufweiten |
DE3720487C1 (de) * | 1987-06-20 | 1988-10-20 | Uni Cardan Ag | Vorrichtung zum hydraulischen Aufweiten |
DE3724904A1 (de) * | 1987-07-28 | 1989-02-09 | Emitec Emissionstechnologie | Aufweitsonde mit aufspreizbaren dichtungen |
DE3729169A1 (de) * | 1987-09-01 | 1989-03-09 | Emitec Emissionstechnologie | Sonde zum hydraulischen aufweiten mit zentriereinrichtung |
-
1998
- 1998-05-15 DE DE19821807A patent/DE19821807C2/de not_active Expired - Fee Related
-
1999
- 1999-05-03 ES ES99920838T patent/ES2196804T3/es not_active Expired - Lifetime
- 1999-05-03 DE DE59905081T patent/DE59905081D1/de not_active Expired - Fee Related
- 1999-05-03 WO PCT/EP1999/002990 patent/WO1999059747A1/de active IP Right Grant
- 1999-05-03 US US09/700,371 patent/US6948709B1/en not_active Expired - Fee Related
- 1999-05-03 EP EP99920838A patent/EP1077780B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59905081D1 (de) | 2003-05-22 |
DE19821807A1 (de) | 1999-12-02 |
EP1077780A1 (de) | 2001-02-28 |
DE19821807C2 (de) | 2000-10-19 |
ES2196804T3 (es) | 2003-12-16 |
WO1999059747A1 (de) | 1999-11-25 |
US6948709B1 (en) | 2005-09-27 |
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