WO1999059747A1 - Gebaute aufweitlanze - Google Patents
Gebaute aufweitlanze Download PDFInfo
- Publication number
- WO1999059747A1 WO1999059747A1 PCT/EP1999/002990 EP9902990W WO9959747A1 WO 1999059747 A1 WO1999059747 A1 WO 1999059747A1 EP 9902990 W EP9902990 W EP 9902990W WO 9959747 A1 WO9959747 A1 WO 9959747A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ring
- sealing
- expanding
- lance according
- expanding lance
- Prior art date
Links
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 an expanding lance according to the preamble of claim 1.
- FIG. 2 An expanding lance of the generic type is known from DE 37 16 986 AI.
- a sealing arrangement is pushed onto a rod-shaped seal carrier (FIG. 2), which consists of spacer sleeves, pairs of sealing rings and intermediate sleeves, the latter being arranged between the sealing rings of the pairs.
- the sealing rings are axially supported on the spacer sleeves or on an end stop.
- FIG. 5a and 6a of the document show versions of the sealing arrangement in which the sealing rings in the form of O-rings are placed in receiving grooves, the O-rings having to be slipped over a special spacer sleeve to take up their intended space in the grooves. Furthermore, the O-rings have on the side facing away from the expansion point Although support body, there is a gap both between the support body and the pipe to be expanded and between this and the O-ring, so that there is no sealing effect when the internal high pressure builds up via the gap. In the case of high internal pressure, the O-ring deforms until it contacts the inside of the tube, but despite the support, the ring is squeezed into the gap between the support body and the tube (FIG. 5a).
- a gap extrusion of the ring also occurs.
- the support ring can extrude itself, after which the O-ring extrudes. This means that the expanding lance cannot be used for a long time.
- the O-rings do not primarily seal here, but rather serve as pressure transmitters for the support body and these are to be pressed against the inside of the pipe in order to apply the sealing effect.
- the admission pressure in area 9 must be the same as the joining pressure in the expansion area, since otherwise the O-ring is pressed into the bore below.
- the hole under the O-ring acts like a punching ring that destroys the O-ring. If there is pressure equalization, the bore under the O-ring acts at the usual pressure rise speeds of around 2000 bar / sec like a nozzle that blasts the O-ring with the pressure fluid. Since the support body is acted upon directly by the pressure medium and the force resulting from both pressure forces has an axial component, the support body can either jam slightly in the gap between the spacer sleeve and the hollow profile or even extrude into it.
- the invention has for its object to develop a generic expanding lance in such a way that the lance can be used for a long time while ensuring a reliable sealing effect of the sealing arrangement.
- the sealing arrangement of the expander ⁇ lance has a priori by the excess of the elastomeric sealing ring with respect to d is the inner diameter of the hollow section to be expanded partially a sufficient sealing effect during the pressure buildup phase.
- the abrasion-poor material bears the seal ring to ensure the Langzeit practitionerfä ⁇ ability of the expansion lance significantly participate in.
- FIG. 2 in a lateral longitudinal section a sealing ring of the sealing arrangement of the expanding lance according to FIG. 1.
- a built expanding lance 1 is shown, with which a rectilinear tubular tubular profile after insertion of the expanding lance 1 and suitable positions discrimination may be partially expanded within the hollow section by exerting a fluidic internal high pressure, for example, cams on the hollow profile to Bil ⁇ dung to add a camshaft.
- a fluidic internal high pressure for example, cams on the hollow profile to Bil ⁇ dung to add a camshaft.
- the expansion lance 1 includes a bar-shaped seal carrier ⁇ 2, which is detachably mounted on a support receptacle, preferably screwed.
- the seal carrier 2 has a central axial inlet bore 3, from which, at certain intervals, which are adapted to the placement of the cams to be joined on the hollow profile, branch off cross bores 4 which open out on its lateral surface 5 in place of the hollow profile expansion to be formed.
- Tion to the Zulaufboh ⁇ 3 is both a fluid pressure source to the Be ⁇ destiny of the inlet bore 3 and thus the Aufweitstelle connected with a pressurized fluid.
- the inlet bore 3 is designed as a blind hole, which ends in a swell 6 of the seal carrier 2, which forms its end ⁇ de.
- the upsetting 6 serves as Endan ⁇ proposal for a sealing arrangement 7, se in a simple Wei ⁇ can be pushed onto the seal carrier 2 without the seals of the assembly 7 over charge with accepting ei ⁇ ner damage to the seal to overstretch.
- the sealing arrangement 7 comprises sealing rings 8, as can be seen particularly from FIG. 2, spacer sleeves 9, intermediate sleeves 10 and positioning stops 11.
- the sealing rings 8 are each provided as a pair of sealing rings and arranged at the location of the expanding lance 1 at which the expansion of the hollow ⁇ profiles should take place.
- the spaced apart like ⁇ Tringe 8 delimit high-pressure-tight axially on both sides the Aufweitstelle, so that an annular Aufweithunt det 12 ausbil ⁇ between the sealing rings 8 of the sealing ring pair.
- the Aufweitsch 12 is connected to a respective intermediate ⁇ sleeve 10 is nearly completed, the radial bores 13 has ⁇ , which adjoin the mouth openings of the Querbohrun ⁇ gene 4 of the expansion lance 1 in aligned with the holes 4 manner.
- the sealing rings 8 supported by an axial stop which is designed as a spacer sleeve. 9 This d ient simultaneously to a distance along the filler A ufweitlanze 1, the sealing rings 8 to move axially.
- the spacer sleeve 9 is in turn axially supported on a positioning stop 11 which is axially immovably fastened on the seal carrier 2.
- the stop 11 absorbs the axial force, which arises on the one hand from the internal high pressure exerted in the expansion chamber 12 and on the other hand from friction-related insertion forces when the expansion lance 1 is inserted into the hollow profile, so that there is no axial displacement of the sealing rings 8 and the spacer sleeves 9 under the influence of the pressure force occurs.
- the upsetting 6 can also be replaced by a positioning stop 11 designed in this way, as a result of which the seal carrier 2 can be designed as a simple cylindrical rod with less manufacturing outlay.
- the inlet bore 3 is then welded to ensure the tightness of the expanding lance 1 in its end region, that is to say in the region of the positioning stop 11.
- the sealing rings 8 are formed with an oversize of the outer diameter with respect to the hollow profile inner diameter, so that when inserting the expanding lance 1 into the hollow profile immediately by the preloaded on the inside of the Hollow profile adjacent sealing rings 8 is a sealing effect ge ⁇ . Furthermore, the sealing rings 8 each consist of two components, the first component being formed by a low-abrasion, high-pressure-resistant elastomer ring 19 which bears on the outer surface 5 of the seal carrier 2.
- the elastomeric ring 19 is thus axially bar from the internal high pressure fully acted upon and entirely elastic warp ⁇ . It preferably consists of a hydrolysis-resistant thermoplastic polyurethane elastomer, and its low abrasion when inserted and pulled out of the hollow profile guarantees high long-term stability. It may also be conceivable to form the elastomer ring 19 from a textile material, in particular an aramid weave.
- the elastomeric ring 19 has a peripheral from its outer circumference ⁇ ra dial outwardly projecting lip 20 having a substantially larger outer diameter than the inner diameter of the hollow section to be expanded.
- the radi ⁇ al outwardly projecting splayed sealing lips 20 of two sealing rings 8 of the sealing ring pair are mutually tends supplied ⁇ , thereby bent upon insertion of the expansion lance 1 in the hollow profile of the sealing lips 20 of this strongly to the log ⁇ tung carrier 2 out so that the bias voltage the sealing rings 8 in the hollow profile and thus the sealing effect is increased.
- the sealing lips 20 bridge the in widening enlarging gap between expansion lance 1 and the hollow profile by means of elastic spring back in its starting position corresponding to the non-use Stel ⁇ development of the expansion lance 1.
- high can pressure-tightly bridged ⁇ the advantageously relatively large column.
- the outer dimensions of the other components of the sealing arrangement 7 can be reduced without loss of a sealing effect, so that jamming of the expanding lance 1 in the hollow profile during insertion and / or during the action of the internal high pressure, which can result in the sealing carrier 2 being raised, can be prevented.
- the formation of the sealing lips 20 also has a manufacturing-technical effect on the sealing arrangement 7, since with a reduced diameter of the expanding lance 1, much larger manufacturing tolerances are permissible.
- the inclination of the sealing lips 20 also has the advantage that when an internal high pressure is exerted, the lips 20 are additionally pressed radially against the inside of the hollow profile with extremely high force, which on the one hand increases the sealing ability of the sealing arrangement 7 considerably and on the other hand to avoid a gap - Textrusion of the sealing ring 8 in the gap between the non-expanding area of the expanding lance 1 and the hollow profile contributes significantly.
- Sealing lip 20 on the side of the intermediate sleeve 10 has a circumferentially chamfered chamfer 21 pointing radially outwards (FIG. 2).
- a notch-shaped annular groove 22 which is open in the axial direction toward the intermediate sleeve 10 and whose outer flank forms the underside 23 of the sealing lip 20 is incorporated into the elastomer ring 19.
- the annular lip 22 gives the sealing lip 20 sufficient elasticity to be able to spring back accordingly when the hollow profile is expanded to ensure sufficient sealing ability.
- the depth of the annular groove 22 should not be so large that there is a risk of the sealing ring 8 cracking, but it should be large enough to ensure sufficient elasticity of the sealing lip 20. Groove depths between 2 and 2.3 mm have proven to be particularly favorable.
- the groove base 24 is also rounded for reasons of voltage technology, where lowered by the notch stress of the annular groove 22 and the Fe ⁇ stmaschine of the sealing ring 8 is increased.
- the elastomeric ring 19 has further one of its In ⁇ nenograph radially inwardly projecting circumferential sealing lip 25 which rests against the seal carrier 2 under bias, where ⁇ is avoided that the fluid under high pressure undercuts so et the sealing ring 8 and a leakage bil d .
- the sealing effect is thus increased by the sealing lip 25.
- the sealing lip 25 has a circumferentially tapered radially inwardly facing chamfer 26, which for the in A ⁇ thrust direction of the expansion lance 1 past sealing ring 8 there d sealing ring pair threading on the seal carrier 2 facilitated and prevents 25 ⁇ thread when on a bending of the sealing lip and for the far lance in the Eischubides on ⁇ 1 previously located sealing ring 8 from kinking when a BPull example, in order to prevent an exchange of the seal carrier. 2
- a m elastomer ring 19 is on its the nearest Q uerbohrung 4 side remote 14 is a circumferential cross ⁇ cut rectangular shoulder 27 formed a the above-mentioned second component of the sealing ring is placed 8 forming the support ring 28 to the ner in egg ⁇ press fit.
- the support ring 28 supported in this way consists of high-pressure-resistant material, is radially elastic and has a very high tensile strength in the axial direction .
- the material used for the S tützring 28 is bronze or a spring steel conceivable.
- the sealing lip 20 is pressed against the hollow profile and on the other hand the fluid is applied axially to the elastomer ring 19.
- this is compressed between the spacer sleeve 9 and the pressure fluid and thereby additionally pressed ring material under the support ring 28, which expands radially as it were driven by the swelling shoulder 27 of the elastomer ring 19 and presses against the hollow profile.
- the gap between the expanding lance 1 and the hollow profile is thereby closed immediately behind the expanding area, the elastomer ring 19 having no possibility of extruding into the gap and thereby being destroyed with a loss of sealing ability.
- the support ring 28 is very stiff in the axial direction and therefore cannot be pushed away or even extrude itself. A reliable sealing effect of the sealing arrangement 7 is thus achieved by the support ring 28 and long-term usability of the expanding lance 1 is ensured.
- the sleeve 9 is arranged with a snug fit on the seal carrier 2.
- a n is the S tirnseite 30 of the raised part 6 of the Dichtungsträ- gers 2 is in the direction of insertion of the expansion lance 1
- the log ⁇ tungsanor d planning 7 preceded by a flexurally elastic stripping ⁇ ring 31 attached, preferably glued, comprises comprising a RESIZE ß older diameter than the inner diameter of the Hollow profile.
- the scraper ring 31 serves to displace particles, S ubennen and loose burrs in the hollow profile, so that the sealing rings sow b ere A nLocated find, which is for the sealing capability ⁇ 7 ness of Dichtungsnan instruct important 8 in its position of use in the hollow profile a.
- the sealing rings 8 can not scrape across said small ⁇ particles and thereby take no damage, so that eite also S T his will contribute to the long-term applicability of the Aufweilanze. 1
- the seal carrier 2 consists for the rest of a vergüte ⁇ th S teel of high yield strength and high tensile strength b ei high elongation, so that the swelling axial load is cleardown reduced by pressure build-up and, d is the tensile strength ie the seal carrier 2, especially if it has a very small diameter, it diminishes in the course of its use. This then becomes so low that the seal carrier 2 tears. The sealing effect would be canceled in case d iesem. The remuneration decisively counteracts this harmful effect.
- the (for example, 60 V WC r 7) seal carrier 2 made from originally normal tool steel is subjected to a ge ⁇ suitable heat treatment.
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)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59905081T DE59905081D1 (de) | 1998-05-15 | 1999-05-03 | Gebaute aufweitlanze |
US09/700,371 US6948709B1 (en) | 1998-05-15 | 1999-05-03 | Assembled expanding lance |
EP99920838A EP1077780B1 (de) | 1998-05-15 | 1999-05-03 | Gebaute aufweitlanze |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19821807.9 | 1998-05-15 | ||
DE19821807A DE19821807C2 (de) | 1998-05-15 | 1998-05-15 | Gebaute Aufweitlanze |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999059747A1 true WO1999059747A1 (de) | 1999-11-25 |
Family
ID=7867861
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/002990 WO1999059747A1 (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) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104607525A (zh) * | 2015-01-19 | 2015-05-13 | 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 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10338385B4 (de) * | 2003-08-21 | 2006-09-21 | Daimlerchrysler Ag | Dichtungsanordnung |
DE10338348B3 (de) * | 2003-08-21 | 2005-04-07 | Daimlerchrysler Ag | Aufweitlanze |
DE10338387B4 (de) * | 2003-08-21 | 2009-01-15 | Daimler Ag | Aufweitlanze zum partiellen Aufweiten eines rohrförmigen Hohlprofiles |
ATE389478T1 (de) * | 2004-06-03 | 2008-04-15 | Balcke Duerr 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 |
Citations (6)
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 |
DE3720487C1 (de) * | 1987-06-20 | 1988-10-20 | Uni Cardan Ag | Vorrichtung zum hydraulischen Aufweiten |
DE3716986A1 (de) | 1987-05-21 | 1988-12-15 | Emitec Emissionstechnologie | Vorrichtung zum hydraulischen aufweiten |
US5388814A (en) * | 1987-05-21 | 1995-02-14 | Emitec Gesellschaft Fur Emissionstechnologie Mbh | Device for hydraulic expansion |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 EP EP99920838A patent/EP1077780B1/de not_active Expired - Lifetime
- 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
Patent Citations (6)
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 |
DE3716986A1 (de) | 1987-05-21 | 1988-12-15 | Emitec Emissionstechnologie | Vorrichtung zum hydraulischen aufweiten |
US5388814A (en) * | 1987-05-21 | 1995-02-14 | Emitec Gesellschaft Fur Emissionstechnologie Mbh | Device for hydraulic expansion |
DE3720487C1 (de) * | 1987-06-20 | 1988-10-20 | Uni Cardan Ag | Vorrichtung zum hydraulischen Aufweiten |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104607525A (zh) * | 2015-01-19 | 2015-05-13 | 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 |
Also Published As
Publication number | Publication date |
---|---|
DE19821807C2 (de) | 2000-10-19 |
US6948709B1 (en) | 2005-09-27 |
EP1077780B1 (de) | 2003-04-16 |
EP1077780A1 (de) | 2001-02-28 |
ES2196804T3 (es) | 2003-12-16 |
DE59905081D1 (de) | 2003-05-22 |
DE19821807A1 (de) | 1999-12-02 |
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