EP1689539B1 - Method for producing a coupling on a pipe and device for producing said coupling - Google Patents
Method for producing a coupling on a pipe and device for producing said coupling Download PDFInfo
- Publication number
- EP1689539B1 EP1689539B1 EP04765466A EP04765466A EP1689539B1 EP 1689539 B1 EP1689539 B1 EP 1689539B1 EP 04765466 A EP04765466 A EP 04765466A EP 04765466 A EP04765466 A EP 04765466A EP 1689539 B1 EP1689539 B1 EP 1689539B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe end
- pipe
- wall thickness
- shaping
- cheeks
- 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.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 230000008878 coupling Effects 0.000 title claims abstract 6
- 238000010168 coupling process Methods 0.000 title claims abstract 6
- 238000005859 coupling reaction Methods 0.000 title claims abstract 6
- 239000010949 copper Substances 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910000640 Fe alloy Inorganic materials 0.000 claims abstract description 4
- 238000007493 shaping process Methods 0.000 claims abstract 9
- 238000000034 method Methods 0.000 claims description 20
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000004323 axial length Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910000881 Cu alloy Inorganic materials 0.000 abstract description 2
- 229910000990 Ni alloy Inorganic materials 0.000 abstract description 2
- 238000007906 compression Methods 0.000 description 10
- 230000006835 compression Effects 0.000 description 8
- 239000011324 bead Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 241001295925 Gegenes Species 0.000 description 1
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
Definitions
- the invention relates to a method for producing a sleeve on a pipe, preferably made of copper or steel or Cu, Ni, Fe alloys, by preferably multi-stage or single-stage expansion of the pipe end with a large diameter jump, wherein in the pipe end axially a widening tool is introduced and an apparatus for producing such a sleeve.
- the JP 54 009152 A discloses a method for two-stage widening of an end portion of a pipe to provide a right-angled step in the transition area between the flared end portion and the remainder of the pipe.
- a forming method and a forming device for a pipe goes out of the DE 100 64 376 A1 out.
- the wall thickness in an end region of the tube is increased without changing its inner diameter at the thickened point.
- the FR 2129921 describes a method and apparatus for deforming a pipe end. Several inner and outer diameters of different sizes are generated. The expanded portion having the end face is thinner than other portions of the pipe end.
- the sleeves are made at the pipe ends by preferably stepwise widening of the pipe section.
- the wall thickness dilutes when expanding the pipe. It has z. B. shown that in a pipe with nominal width> 50 mm and with a wall thickness of 2.7 mm, the wall thickness after a two-stage expansion is only 2.4 mm.
- the pipe end is usually additionally flared inwards to have behind the bead later in the joining of pipes a sufficient grip for the sealing elements.
- the fitting is then subjected to the heaviest load, which in the worst case can lead to leaks.
- the invention is therefore based on the object to propose a method and an apparatus for producing a sleeve on a pipe in which can be dispensed with an increase in the wall thickness of the tubes used.
- the proposal according to the invention provides, in particular together with the last expansion stage or in a separate working step, to carry out an upsetting operation at the pipe end, wherein the inner diameter is predetermined with the expansion tool.
- the outer diameter is limited by the compression tool and the outer mold jaw, which surrounds the pipe end during expansion.
- the compression device consists essentially of a cylindrical tube with an inner annular recess for receiving the expanded pipe end, which is pressed axially against the end face of the pipe end.
- the inner diameter of the recess and the molding jaws are preferably matched to one another in the region in which the wall thickness should increase, so that the desired wall thickness can be achieved depending on the intended stroke or the relative movement between compression device and mold jaws.
- This in Fig. 1 illustrated finished tube 1 has the wall thickness d1, which corresponds to the wall thickness of the original pipe material.
- the tube 1 After a two-stage widening, the tube 1 has a first conical part 5, a first cylindrical part 7 adjacent thereto with a reduced wall thickness d7 corresponding to the extent of widening relative to d1, a second conical part 6, an adjoining second cylindrical part 8 and a second conical part inwardly bent beading edge 9.
- the second cylindrical member 8 has a Wall thickness d8, which has been increased to the required extent by the upsetting process according to the invention prior to the production of the beading edge 9.
- the wall thickness d8 should be at least as large as the wall thickness d7. It has even proved favorable to bring the wall thickness d8 up to the wall thickness of d1.
- the multi-stage expansion tool 2 has already been pressed axially into the pipe end.
- the shape of the sleeve with the parts 5 to 8 is formed inside by the parts 5 'to 8' of the expansion tool 2 and on the outside by the parts 5 "to 8" of the forming jaw 3.
- the compression device consisting essentially of a cylindrical tube 4 is pressed with the inner lugs 10 axially against the tube end, wherein the relative movement between mold jaws 3 and 4 upsetting device max. Hub X can have.
- the compression device 4 For receiving the cylindrical part 8 of the pipe end, the compression device 4 has an annular recess which is formed by the cylindrical part 11 and the projection 10.
- the required increase in wall thickness by the upsetting process but it may also be beneficial, at the same time by the portion of the cylindrical part 8 which is encompassed by the mold jaws 3 to thicken the compression process.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Pipe Accessories (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer Muffe an einem Rohr, vorzugsweise aus Kupfer oder Stahl oder Cu-, Ni-, Fe-Legierungen, durch vorzugsweise mehrstufiges oder einstufiges Aufweiten des Rohrendes mit grossem Durchmessersprung, wobei in das Rohrende axial ein Aufweitwerkzeug eingeführt wird und eine Vorrichtung zur Herstellung einer derartigen Muffe.The invention relates to a method for producing a sleeve on a pipe, preferably made of copper or steel or Cu, Ni, Fe alloys, by preferably multi-stage or single-stage expansion of the pipe end with a large diameter jump, wherein in the pipe end axially a widening tool is introduced and an apparatus for producing such a sleeve.
Aus der
Die
Ein Umformverfahren und eine Umformvorrichtung für ein Rohr geht aus der
Die
Bei der Herstellung von Kupfer- bzw. Stahlfittings aus Rohren werden die Muffen an den Rohrenden durch vorzugsweise stufenweises Aufweiten des Rohrabschnittes hergestellt. Bei jeder benötigten Stufe verdünnt sich hierbei die Wandstärke beim Aufweiten des Rohres. Es hat sich z. B. gezeigt, dass bei einem Rohr mit Nennweite > 50 mm und mit einer Wandstärke von 2,7 mm die Wandstärke nach einer zweistufigen Aufweitung nur noch 2,4 mm beträgt. In der letzten Stufe der Aufweitung mit der dünnsten Wandstärke wird das Rohrende in der Regel zusätzlich nach innen umgebördelt, um hinter dem Bördelrand beim späteren Zusammenfügen von Rohren einen ausreichenden Halt für die Dichtelemente zu haben. An der Stelle der Umbördelung und im Bereich der Dichtelemente wird dann später der Fitting am stärksten belastet, was im ungünstigsten Fall zu Undichtigkeiten führen kann. Derartige Undichtigkeiten können dann entstehen, wenn wegen der dünnen Wandstärke die Muffe an der in der beigefügten
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Herstellung einer Muffe an einem Rohr vorzuschlagen, bei dem auf eine Vergrößerung der Wanddicke der eingesetzten Rohre verzichtet werden kann.The invention is therefore based on the object to propose a method and an apparatus for producing a sleeve on a pipe in which can be dispensed with an increase in the wall thickness of the tubes used.
Die Lösung dieser Aufgabe ist in den Patenansprüchen 1 und 5 angegeben. Die Unteransprüche 2 bis 4 enthalten sinnvolle ergänzende Verfahrensvorschläge. In den Unteransprüchen 6 bis 8 sind vorteilhafte Ausführungsformen der erfindungsgemäßen Vorrichtung beschrieben.The solution to this problem is specified in the
Um der beim Verfahren nach dem Stand der Technik geschilderten Problematik zu entgehen, sieht der erfindungsgemäße Vorschlag vor, insbesondere zusammen mit der letzten Aufweitstufe oder in einem separaten Arbeitsschritt einen Stauchvorgang am Rohrende durchzuführen, wobei der Innendurchmesser mit dem Aufweitwerkzeug vorgegeben wird. Der Außendurchmesser wird begrenzt durch das Stauchwerkzeug und den äußeren Formbacken, der das Rohrende beim Aufweiten umgibt.In order to avoid the problem described in the prior art method, the proposal according to the invention provides, in particular together with the last expansion stage or in a separate working step, to carry out an upsetting operation at the pipe end, wherein the inner diameter is predetermined with the expansion tool. The outer diameter is limited by the compression tool and the outer mold jaw, which surrounds the pipe end during expansion.
Mit dem erfindungsgemäßen Verfahren ist es, insbesondere bei Rohren aus Kupfer oder Cu-, Ni-, Fe-Legierungen möglich eine Verdickung der Wandstärke an den Stellen zu erreichen, wo sie für die spätere Anwendung kräftemäßig benötigt wird. Die Verdickung der Wandstärke hängt naturgemäß davon ab, wie groß der in
Es hat sich insbesondere als günstig erwiesen, die Wandstärke in dem kritischen Bereich auf die gleiche Dicke zu bringen, wie bei dem Ausgangsmaterial des Rohres. Durch diesen Erfindungsvorschlag kann die Wanddicke des Ausgang-Rohrstückes um den Betrag geringer sein, wie sich bei dem Stauchvorgang die Wanddicke verstärken läßt. Somit lassen sich in erheblichen Umfang Materialkosten einsparen. Die erfindungsgemäße Vorrichtung zur Herstellung einer Muffe an einem Rohrende nach dem beschriebenen Verfahren besteht gemäß Patentanspruch 5 aus
- einem axial in das Rohrende einführbaren Aufweitwerkzeug mit ein oder mehreren konischen und zylindrischen Teilen, die die späteren Innendurchmesser des Rohrendes bestimmen,
- ein oder mehreren Formbacken mit konischen und zylindrischen Teilen, die die späteren Außendurchmesser des Rohrendes bestimmen und
- einer im Wesentlichen zylindrisch ausgebildeten Stauchvorrichtung, deren kleinster Innendurchmesser mit dem notwendigen Spiel dem maximalen Außendurchmesser des Aufweitwerkzeuges entspricht und das einen im Wesentlichen radial verlaufenden ringförmigen Ansatz besitzt, der für den Stauchvorgang axial gegen die Stirnfläche des Rohrendes preßbar ist.
- an expansion tool insertable axially into the pipe end and having one or more conical and cylindrical parts which determine the later inner diameters of the pipe end,
- one or more mold jaws with conical and cylindrical parts, which determine the later outer diameter of the pipe end and
- a substantially cylindrically shaped compression device whose smallest inner diameter with the necessary clearance corresponds to the maximum outer diameter of the expansion tool and which has a substantially radially extending annular projection which is compressible axially against the end face of the pipe end for the compression process.
Durch das Zusammenwirken von Aufweitwerkzeug, Formbacken und Stauchvorrichtung kann also eine vorzugsweise mehrstufig aufgeweitete Rohrmuffe geformt werden. Die Stauchvorrichtung besteht dabei im Wesentlichen aus einem zylindrischen Rohr mit einer inneren ringförmigen Aussparung zur Aufnahme des aufgeweiteten Rohrendes, das axial gegen die Stirnseite des Rohrendes gepreßt wird. Die Innendurchmesser der Aussparung und des Formbacken sind vorzugsweise in dem Bereich, in dem es zu einer Vergrößerung der Wanddicke kommen soll, derartig aufeinander abgestimmt, daß in Abhängigkeit von dem vorgesehenen Hub bzw. der Relativbewegung zwischen Stauchvorrichtung und Formbacken die gewünschte Wanddicke erreicht werden kann.Through the interaction of expansion tool, mold jaws and compression device so a preferably multi-stage expanded pipe sleeve can be formed. The compression device consists essentially of a cylindrical tube with an inner annular recess for receiving the expanded pipe end, which is pressed axially against the end face of the pipe end. The inner diameter of the recess and the molding jaws are preferably matched to one another in the region in which the wall thickness should increase, so that the desired wall thickness can be achieved depending on the intended stroke or the relative movement between compression device and mold jaws.
Die Erfindung wird anhand der beigefügten
- Fig. 1
- zeigt im Querschnitt die Form einer erfindungsgemäß hergestellten Muffe an einem Rohr 1.
- Fig. 2
- zeigt im Schnitt eine vorteilhafte Ausführungsform der erfindungsgemäßen Vorrichtung bei dem Vorgang der Aufweitung und Stauchung des Rohrendes.
- Fig. 1
- shows in cross section the shape of a sleeve produced according to the invention on a pipe first
- Fig. 2
- shows in section an advantageous embodiment of the device according to the invention in the process of expansion and compression of the pipe end.
Das in
Bei der
- 11
- Rohrpipe
- 22
- Aufweitwerkzeugflaring
- 33
- Formbackenforming jaws
- 44
- Stauchvorrichtungclincher
- 55
- Konischer Teil von 1Conical part of 1
- 5'5 '
- Konischer Teil von 2Conic part of 2
- 5"5 '
- Konischer Teil von 3Conical part of 3
- 66
- Konischer Teil von 1Conical part of 1
- 6'6 '
- Konischer Teil von 2Conic part of 2
- 6"6 "
- Konischer Teil von 3Conical part of 3
- 77
- Zylindrischer Teil von 1Cylindrical part of 1
- 7'7 '
- Zylindrischer Teil von 2Cylindrical part of 2
- 7"7 "
- Zylindrischer Teil von 3Cylindrical part of 3
- 88th
- Zylindrischer Teil von 1Cylindrical part of 1
- 8'8th'
- Zylindrischer Teil von 2Cylindrical part of 2
- 8"8th"
- Zylindrischer Teil von 3Cylindrical part of 3
- 99
- Bördelrandbeaded
- 1010
- Ansatz an 4Approach to 4
- 1111
- Zylindrischer Teil von 4Cylindrical part of 4
- XX
- Hub von 4 (max.)Stroke of 4 (max.)
- d1d1
- Wanddicke von 1Wall thickness of 1
- d7d7
- Wanddicke von 5Wall thickness of 5
- d8d8
- Wanddicke von 8Wall thickness of 8
Claims (8)
- Method for producing a coupling on a pipe (1), preferably made of copper or steel or Cu, Ni, Fe alloys, preferably by multistage or single-stage widening of the pipe end with a change of diameter,
wherein a widening tool (2) is inserted axially into the pipe end, as a result of which a cylindrically widened part (8) having the face of the pipe end is formed,
wherein with and/or after the insertion of the widening tool (2) into the pipe end an upsetting device (4) with an annular recess formed by an annular attachment (10) and a cylindrical part (11) to receive the widened part (8) is pressed with its attachment (10) axially against the face of the pipe end on the widened part (8) and the thus effective force completely or partially upsets the widened part (8),
wherein the inside diameter of the part (8) is restricted by the widening tool (2), wherein the outside diameter of the pipe end to be machined is restricted by one or more shaping cheeks (3) partially surrounding the pipe end, and
wherein the inside diameters of the recess and the shaping cheeks (3) in the region of the part (8), in which an increase in wall thickness is to occur, are matched to one another in such a manner that the desired wall thickness is obtained in dependence on the provided relative movement between the upsetting device (4) and the shaping cheeks (3). - Method according to claim 1, characterised in that in the case of multistage widening of the pipe end, only the widened region (8) of the pipe end with the largest diameter is upset.
- Method according to claim 1 or 2, characterised in that the widened part (8) of the pipe end is upset to such an extent that the wall thickness (d8) is increased in the upset section to the wall thickness (d1) of the rest of the pipe or at least to the wall thickness (d7) of the previously widened section.
- Method according to claim 1, 2 or 3, characterised in that the upset pipe ends are beaded inwards to receive sealing elements.
- Device for producing a coupling on a pipe end according to the method described in the preceding claims, comprising• a widening tool (2) that can be inserted axially into the pipe end and has one or more conical and cylindrical parts (5', 6', 7', 8'), which determine the subsequent inside diameters of the pipe end,• one or more shaping cheeks (3) with conical and cylindrical parts (5"; 6", 7", 8"), which determine the subsequent outside diameters of the pipe end and for this partially surround the pipe end,• a substantially cylindrically configured upsetting device (4), the smallest inside diameter of which corresponds to the maximum outside diameter of the widening tool (2) with the necessary play and which has a recess formed from an annular attachment (10) and a cylindrical part (11), which serves to receive a widened part (8) having the face of the pipe end, wherein for the upsetting process the attachment (10) can be pressed axially against the face of the pipe end, and• wherein the inside diameters of the recess and the shaping cheeks (3) in the region of the part (8), in which an increase in wall thickness is to occur, are matched to one another in such a manner that the desired wall thickness is obtained in dependence on the provided relative movement between the upsetting device (4) and the shaping cheeks (3).
- Device according to claim 5, characterised in that on the side facing the pipe end the widening tool (2) has a cylindrical part (11) adjoining the attachment (10), the inside diameter of which determines the increased outside diameter obtained after the upsetting process of the cylindrical part (8) of the pipe end with the largest diameter.
- Device according to claim 6, characterised in that the inside diameter of the cylindrical part (11) corresponds to the maximum inside diameter of the shaping cheeks (3).
- Device according to claim 6 or 7, characterised in that the axial length of the cylindrical part (11) is greater than or equal to the length of the cylindrical part of the shaping cheeks (3) with the largest inside diameter.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10356317 | 2003-11-28 | ||
PCT/EP2004/010591 WO2005061148A1 (en) | 2003-11-28 | 2004-09-22 | Method for producing a coupling on a pipe and device for producing said coupling |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1689539A1 EP1689539A1 (en) | 2006-08-16 |
EP1689539B1 true EP1689539B1 (en) | 2011-06-29 |
Family
ID=34683278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04765466A Active EP1689539B1 (en) | 2003-11-28 | 2004-09-22 | Method for producing a coupling on a pipe and device for producing said coupling |
Country Status (8)
Country | Link |
---|---|
US (1) | US7770429B2 (en) |
EP (1) | EP1689539B1 (en) |
JP (1) | JP2007512140A (en) |
CN (1) | CN100384563C (en) |
AT (1) | ATE514498T1 (en) |
BR (1) | BRPI0416941A (en) |
DE (1) | DE102004045981A1 (en) |
WO (1) | WO2005061148A1 (en) |
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DE19757021A1 (en) * | 1997-12-20 | 1999-07-15 | Federal Mogul Wiesbaden Gmbh | Bearing bush and process for its manufacture |
DE10031989B4 (en) | 2000-06-30 | 2007-08-16 | Witzig & Frank Gmbh | Method and device for producing press fittings made of steel, in particular stainless steel |
DE10064376A1 (en) * | 2000-12-21 | 2002-06-27 | Schmittersysco Gmbh | Pipe deformation process for exhaust pipes involves creating widened and thickened pipe wall directly at end sector |
GB0128667D0 (en) * | 2001-11-30 | 2002-01-23 | Weatherford Lamb | Tubing expansion |
US7140226B2 (en) * | 2002-08-05 | 2006-11-28 | Giant Manufacturing Co., Ltd. | Methods for making a bicycle frame part having a disproportionally enlarged end section |
-
2004
- 2004-09-22 CN CNB2004800353370A patent/CN100384563C/en not_active Expired - Fee Related
- 2004-09-22 EP EP04765466A patent/EP1689539B1/en active Active
- 2004-09-22 BR BRPI0416941-7A patent/BRPI0416941A/en not_active IP Right Cessation
- 2004-09-22 US US10/580,859 patent/US7770429B2/en active Active
- 2004-09-22 WO PCT/EP2004/010591 patent/WO2005061148A1/en active Application Filing
- 2004-09-22 AT AT04765466T patent/ATE514498T1/en active
- 2004-09-22 JP JP2006540195A patent/JP2007512140A/en active Pending
- 2004-09-22 DE DE102004045981A patent/DE102004045981A1/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
BRPI0416941A (en) | 2007-02-13 |
CN100384563C (en) | 2008-04-30 |
EP1689539A1 (en) | 2006-08-16 |
JP2007512140A (en) | 2007-05-17 |
DE102004045981A1 (en) | 2005-07-21 |
US7770429B2 (en) | 2010-08-10 |
US20070256467A1 (en) | 2007-11-08 |
ATE514498T1 (en) | 2011-07-15 |
CN1886210A (en) | 2006-12-27 |
WO2005061148A1 (en) | 2005-07-07 |
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