EP1604752A1 - Hydraulisches Aufweitverfahren und Vorrichtung dafür - Google Patents
Hydraulisches Aufweitverfahren und Vorrichtung dafür Download PDFInfo
- Publication number
- EP1604752A1 EP1604752A1 EP04013164A EP04013164A EP1604752A1 EP 1604752 A1 EP1604752 A1 EP 1604752A1 EP 04013164 A EP04013164 A EP 04013164A EP 04013164 A EP04013164 A EP 04013164A EP 1604752 A1 EP1604752 A1 EP 1604752A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- expansion
- probe
- tube
- hydraulic oil
- 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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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
Definitions
- the invention relates to a method for hydraulic expansion of a pipe against a holding opening an adjacent component, in which with a hydraulic oil via a media separator and a pressure multiplier a pressure state in the pressure medium is generated and a device for Implementation of this procedure. Furthermore, the invention also relates to a method for detection a maximum permissible number of hydraulic tube expansions up to material fatigue of the Pressure probe.
- Such methods and devices are for. B. from DE 2616523 known and have in the past as very suitable methods or devices, among other things for attachment of heat exchanger tubes in heat exchangers or in the manufacture of camshafts for Shown automotive engines.
- the invention is therefore the object of the feasible with a number of hydraulic tube expansions expander to enlarge.
- the invention accordingly relates to a basically known method for hydraulic Expansion of pipes, in which with a hydraulic oil via a media separator and a Pressure multiplier a pressure state is generated in the pressure medium.
- This known method records characterized by the fact that there are two different and separate liquids for expansion used, on the one hand, the pressure medium and on the other hand, a hydraulic oil, the pressure generating on the pressure medium acts.
- a hydraulic oil the pressure generating on the pressure medium acts.
- the separation of the pressure fluid circuit from the hydraulic oil circuit succeeds by using a Media separator and a pressure multiplier, both with the two fluid circuits keep in touch.
- the medium separator serves to fill the expansion device or the Pressure multiplier and the pressure multiplier the actual pressure build-up for the expansion.
- the elastic seals on the pressure probe can fit well in this Adapt process step occurring loads. This reduces the deformation speed and this leads to reduced fatigue on the seals. It includes the filling with pressure medium, the filling of the expansion space, the pressure probe and all with the pressure probe connected pressure lines and devices such. the pressure multiplier. moreover the filling period is limited to one for the pumps and pistons of the expander sufficiently long response time but at the same time ensures the operation with a short Optimized maximum time. In addition, it can be seen from the excess of the maximum time that e.g. There is a leak, so the seals or the pressure probe must be checked.
- the investigations have shown that in particular the increase of the expansion pressure to 13 to 15 times, preferably 14 times, the hydraulic oil pressure through the pressure multiplier in the Interplay with the limited time periods for filling the expansion space and the pressure probe represents a particularly favorable ratio.
- This combination reduces again very strongly the Fatigue in the seals and in the pressure probe and much more than this can expect the individual measures.
- it has a filling pressure of 1.4 times of the hydraulic oil pressure is 14 times the hydraulic oil pressure, compared to an expansion pressure is considered optimal.
- the expansion pressure for an expansion time of 1 s is held to a maximum of 10 s.
- the pipe begins to deform plastically, one speaks here of the flow of Pipe material that undergoes a great permanent deformation.
- the tube deformations become controlled over time and not over the force application, the expansion time depending the pipe materials, the geometry of the retaining opening and the rigidity or geometry of the adjacent Component is selected.
- the limitation of the period again gives the usual Dimensions and materials corresponding deformation behavior.
- the seals have again just enough time to the plastic deformations of the pipe section to be expanded, to be able to follow.
- the minimum limit of 1 s is a value that necessarily is required so that conventional materials deform sufficiently plastically.
- an expansion pressure of 2000 bar to 4000 bar generated is generated. This pressure range is suitable for the expansion of pipes of all common materials from the standpoint of the stability of the expansion devices are particularly suitable shown.
- the pressure probe spaced from the welded Tube plate edge arranged out the distance of 1.0 times 1.5 times the inner diameter of the tube to be expanded.
- a deformation occurring in the pipe is already preferred during the expansion measured.
- This deformation measurement of the pipe during expansion can be used to optimize the pressure introduction, in turn, the devices to carry out the method such.
- the resulting in the pipe deformation from a pressure drop in Pressure medium and / or determined in the hydraulic oil.
- the Pressure medium or the hydraulic oil measure the deformation indirectly. You can do that, for example Measure plastic deformation behavior metrologically, since when reaching the so-called yield point fundamentally changes the material behavior. Until reaching the yield point points, for example Steel has an approximately linear relationship of stress and strain while afterward large deformations occur without further pressure increases. When a steel pipe flows, it stretches it is suddenly very strong under the current pressure. This effect is now for metrological Recording the deformation behavior used.
- the pressurized pressure medium due to of the quickly increased tube cross-section with one time easily relax again. This leads to a short-term pressure reduction, which is metrologically z. B. by a fluctuation of Pressure or possibly determine the drive power of the hydraulic system. In order to it is possible to measure directly during the expansion of the resulting deformations.
- the method is carried out such that the expansion pressure and / or the expansion time be selected depending on the deformation occurring in the pipe. So it finds a coupling of widening parameters with the actually occurring deformation taking place so that it it is possible to optimize the expansion pressure and expansion time to the extent that they are just the desired Create deformation.
- the method is carried out with the aid of a control device, wherein the control device keeps the expansion pressure constant during the expansion time.
- a suitable control device such.
- a computer with storage medium and arithmetic unit the expansion pressure of the control device by suitable Measuring means, such.
- B. high pressure transducers (HD transducers) determined. Will it then during the expansion process to increased volume changes in the expansion space is, by the control device a drive member, such as. As a hydraulic pump, readjusted in its performance. Thereby the pressure drop due to the flow is compensated and the expansion process accelerated or optimized again.
- the control device is at least the Geometry of the pipe to be expanded and the holding opening in the adjacent component and a predetermined Tube holding force input, wherein the control device to achieve this tube holding force required expansion pressure and the expansion time determined.
- the achievable Pipe holding force ie the force with which the pipe is to be held later in the holding opening
- the control device is specified as the target value.
- control device for determining the required Aufweitdrucks and Aufweitzeit the material properties of the pipe and possibly also of the adjacent component independently determined from a deformation measurement.
- the control device By recording the deformation behavior as a function of the applied pressure can then be the control device either by comparing the measured values from the deformation measurement with a material database recognize which materials or materials it is or independently own material laws calculate. This ensures the highest accuracy in the application of the expansion pressures and the Aufweit NASA and significantly reduces the burden of the pressure probes and sealing components. So it increases again the number of expansions made with a widening device can be.
- control device determines a degree of wear of the pressure probe.
- a degree of wear of the pressure probe can be z. B. from the number of actually made with the pressure probe Expansions arise.
- the can Voltages z. B. from the applied pressures in the hydraulic system can be determined.
- the degree of wear allows an assessment of the condition of the pressure probe, increasing the number of expansions or the duration of the use of the pressure probe optimally adapt to its durability can. This results in a significantly higher overall use or expansion numbers, which with a Pressure probe can be made.
- the task is also performed by a method for determining a maximum number of hydraulic Tube expansions that can be made with a pressure probe, solved in which the maximum number of widenings taking into account the tube deformations of the widened Pipes is determined. It is therefore a method for predicting the stability of the pressure probe, in which the load of the pressure probe indirectly over the deformations of the expanded by him Pipe and not from the immediate load of the pressure probe is determined. This has the Advantage that you can measure the deformations of the expanded tube much easier than for Example a stress load of the pressure probe itself. On the other hand, there is depending The seals used have a direct relationship between the tube deformation and the load the probe, so that an upper limit for the load capacity of the pressure probe can be determined can.
- the maximum number of possible Expansions determined with defined tube deformations that means the maximum possible Number of expansions that can be performed with the pressure probe based on the desired tube deformations is set, and if possible before even only a widening with the pressure probe has been made.
- the conditions of use of the probe are specifically determined and then determined their lifetime. This way you can tell the user of the pressure probe Before using the pressure probe, tell us how often you use it under these conditions may. This gives a very accurate estimate of the load on the pressure probe, which is due to the most likely actually occurring load of the pressure probe oriented.
- this development can also be based on the defined tube deformations Stability prognosis are made starting. Then opposite to a deviation the defined pipe deformations a corrected maximum number taking into account the actually determined with the pressure probe tube deformations determined. Starting from a first Theoretical estimation thus results in an improved prognosis after each expansion maximum permissible number of expansions.
- the object is also achieved with a device for carrying out these methods, which a media separator, a pressure multiplier and a pressure probe with seals, wherein via the medium separator and the pressure multiplier with a hydraulic oil a pressure state in Pressure medium is generated, in which the material of the pressure probe 34 CrNiMo 6 is.
- a device for carrying out these methods which a media separator, a pressure multiplier and a pressure probe with seals, wherein via the medium separator and the pressure multiplier with a hydraulic oil a pressure state in Pressure medium is generated, in which the material of the pressure probe 34 CrNiMo 6 is.
- the hydraulic oil should comply with DIN 51524 Part 2. This guarantees a special high degree of operational safety and efficiency of the hydraulic expansion device, which like Experiments have shown to depend largely on the quality of the hydraulic oil used. Consequently This assumes the task of an energy carrier, while it also all mutually moving internal parts reliably lubricates the expander. At the same time, such a hydraulic oil seizes the not mentioned above, does not foams at the present working pressures, points good aging resistance and provides good corrosion protection. Finally, such a thing procured hydraulic oil also has a favorable viscosity-temperature ratio, that is, at the temperature differences that occur in the oil during the expansion operation are not very great Toughness changes.
- the hydraulic oil is filtered and / or cooled, the maximum oil temperature preferably is limited to 40 ° C to 50 ° C.
- the hydraulic oil is the purity class 16/12 comply with ISO 4406. With the cooling an inadmissible heating of the hydraulic oil is avoided wherein advantageously an air-cooled oil cooler is used, which is at 50 ° C and at 40 ° C off.
- the pressure multiplier 4 is connected to the hydraulic oil tank 7 via a hydraulic line 10 and the media separator 3 via one of the hydraulic line 10 branching hydraulic line 11 and a hydraulic line 12 connected to the oil tank 7. From the water tank 5 leads a pressurized water line 13 to the pressure probe line 14, from the a leading to the media separator 15 leading pressure water line 15 branches off.
- the pressure probe 2 For hydraulic expansion of a pipe 16 in a holding opening 17 of an adjacent Tube plate 18, the pressure probe 2 is inserted into the tube in a first step.
- first embodiment of the pressure probe 2 secures a circular over the diameter the pipe 16 projecting stop 19, that the seals 20 and 21 of the pressure probe itself located within the holding opening 17. It is thus ensured by the stop 19 that the Widening of the tube takes place only in the region of the holding opening 17.
- the distance corresponds between the stopper 19 and the rear pressure probe seal 21, the 1.0 times the inner diameter of the tube to be expanded, since here the tube 16 to be expanded already in the tube plate 18 has been welded to seal with a sealing weld 22.
- the switching valve 6 is brought to the position II, so that the oil pump 23 hydraulic oil in the pressure multiplier 4 pumps and at the same time on the hydraulic line 11 a reset the media separator piston 8 causes. So it is hydraulic oil at the same time in the pressure multiplier. 4 pumped and pushed out of the media separator 3 and new water in the media separator 3 sucked.
- the water in Pressure multiplier 4 and the associated expansion space pressurized. From the piston ratio of 1:14 of the pressure multiplier 4 results in a 14-fold over the hydraulic oil pressure Increasing the water pressure compared to the hydraulic oil pressure.
- the hydraulic oil pressure can while being read on a gauge 25.
- the switching valve 6 is brought into a third position. This is the idle, wherein the pressure probe 2, the media separator 3 and the pressure multiplier 4 are relieved. At the same time, the oil pump 23 is turned off, so that the water the pressure multiplier piston 9th again push back, since the water due to the check valve 26 only in the pressure multiplier 4 can flow. After completion of the Aufweitvorgangs then the pressure probe 2 from the expanded tube 16 are pulled out, remaining water flows out and the expander 1 is available for another expansion process.
- FIG. 2 a second embodiment of the pressure probe 2 is shown, each two with the Pressure probe line 14 connected inflow lines 27 and 28 has. On these two inflow pipes 27, 28 each seated in an annular recess 29, a sealing ring 20 and 21st
- This embodiment of the pressure probe has the advantage that the filling of the expansion space between the two sealing rings 20, 21 is such that the water through the pressure probe line 14 and the associated inflow lines 27 and 28 is pumped.
- the water presses the sealing rings 20 and 21 against the wall of the tube 16. That is, the sealing rings during of insertion do not protrude beyond the surface of the pressure probe 2, hence the pressure probe 2 can be easily introduced.
- Only when filling the expansion space with water are the seals 20, 21 expanded from the outflowing water and thereby applied to the pipe 16 for sealing. This minimizes the abrasion of the seals 20, 21 when inserted into the tube 16 and thus increases the Number of expansions that can be made with them.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Lubricants (AREA)
- Earth Drilling (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
- Fig. 1.
- eine räumliche Schnittdarstellung einer hydraulischen Aufweitvorrichtung mit einer Drucksonde gemäß einem ersten Ausführungsbeispiel;
- Fig. 2.
- einen Längsschnitt durch eine in ein aufzuweitendes Rohr eingeführte Drucksonde gemäß einem zweiten Ausführungsbeispiel.
Claims (18)
- Verfahren zum hydraulischen Aufweiten eines Rohres (16) gegen eine Halteöffnung (17) eines angrenzenden Bauteils (18), bei dem mit einem Hydrauliköl über einen Medientrenner (3) und einen Druckmultiplikator (4) ein Druckzustand im Druckmittel erzeugt wird und bei dem:a) eine Drucksonde (2) in einen von der Halteöffnung (17) außen umgebenen aufzuweitenden Rohrabschnitt eingebracht wird, wobei an der Drucksonde (2) befestigte Dichtungen (20, 21) einen Aufweitraum zwischen dem aufzuweitenden Rohrabschnitt und der Drucksonde (2) abdichten;b) das Druckmittel in einer Füllzeit von mindestens 1 s und maximal 20 s in den mit der Drucksonde (2) verbundenen Druckmultiplikator (4), die Drucksonde (2) und den Aufweitraum gedrückt wird, wobei durch den Medientrenner (3) ein Fülldruck im Druckmittel erzeugt wird, der das 1,3-fache bis 1,5-fache, vorzugsweise 1,4-fache, des Hydrauliköldrucks beträgt;c) ein Aufweitdruck im Druckmittel in einer Druckaufbauzeit von mindestens 1 s und maximal 20 s aufgebaut wird, wobei der Aufweitdruck im Druckmittel durch den Druckmultiplikator (4) auf das 13-fache bis 15-fache, vorzugsweise 14-fache, des Hydrauliköldrucks gesteigert wird.d) der Aufweitdruck im Druckmittel für eine vorgegebene Aufweitzeit von mindestens 1 s und maximal 10 s gehalten wird;e) der Aufweitdruck automatisch nach Ablauf der Aufweitzeit abgebaut wird.
- Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass ein Aufweitdruck von 2000 bar bis 4000 bar erzeugt wird. - Verfahren nach einem der beiden vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass zum Aufweiten eines zuvor in eine Rohrplatte (18) eingeschweißten Rohrs (16) die Drucksonde (2) beabstandet zum verschweißten Rohrplattenrand (22) hin angeordnet wird, wobei der Abstand das 1,0-fache bis 1,5-fache des Innendurchmessers des aufzuweitenden Rohrs (16) beträgt. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass wenigstens eine sich im Rohr (16) einstellende Verformung während der Aufweitung gemessen wird. - Verfahren nach Anspruch 4,
dadurch gekennzeichnet, dass die sich im Rohr (16) einstellende Verformung aus einem Druckabfall im Druckmittel und/oder im Hydrauliköl ermittelt wird. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der Aufweitdruck und/oder die Aufweitzeit in Abhängigkeit der sich im Rohr (16) einstellenden Verformung gewählt werden. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass eine Regelungseinrichtung den Aufweitdruck während der Aufweitzeit konstant hält. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass der Regelungseinrichtung wenigstens die Geometrie des aufzuweitenden Rohrs (16) sowie der Halteöffnung (17) im angrenzenden Bauteil (18) und eine vorgegebene Rohrhaltekraft eingegeben werden, wobei die Regelungseinrichtung den zur Erreichung dieser Rohrhaltekraft erforderlichen Aufweitdruck und die Aufweitzeit ermittelt. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet , dass die Regelungseinrichtung zur Bestimmung des erforderlichen Aufweitdrucks und der Aufweitzeit die Materialeigenschaften des Rohrs (16) und gegebenenfalls auch des angrenzenden Bauteils (18) selbständig aus einer Verformungsmessung ermittelt. - Verfahren nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Regelungseinrichtung einen Abnutzungsgrad der Drucksonde (2) ermittelt. - Verfahren zur Ermittlung einer maximalen Anzahl hydraulischer Rohraufweitungen, die mit einer Drucksonde vorgenommen werden können,
dadurch gekennzeichnet, dass die maximale Anzahl der Aufweitungen unter Berücksichtigung der Rohrverformungen der aufgeweiteten Rohre (16) ermittelt wird. - Verfahren nach Anspruch 11,
dadurch gekennzeichnet, dass vor der Durchführung von Aufweitungen die maximale Anzahl der möglichen Aufweitungen mit definierten Rohrverformungen ermittelt wird. - Verfahren nach Anspruch 11 oder 12,
dadurch gekennzeichnet, dass die sich einstellenden Rohrverformungen nach der Durchführung wenigstens einer, vorzugsweise jeder, Aufweitung gemessen werden und daraus eine maximale Anzahl der möglichen Aufweitungen ermittelt wird. - Vorrichtung zur Durchführung eines Verfahrens nach einem der Ansprüche 1 bis 10, die einen Medientrenner (3), einen Druckmultiplikator (4) und eine Drucksonde (2) mit Dichtungen (20, 21) aufweist, wobei über den Medientrenner (3) und den Druckmultiplikator (4) mit einem Hydrauliköl ein Druckzustand im Druckmittel erzeugt wird,
dadurch gekennzeichnet, dass der Werkstoff der Drucksonde (2) 34 CrNiMo 6 ist. - Vorrichtung nach Anspruch 14,
dadurch gekennzeichnet, dass die Dichtungen (20, 21) an der Drucksonde (2) aus einem Dichtungsmaterial mit der Härte 90 Shore A bestehen. - Vorrichtung nach einem der beiden vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Hydrauliköl der DIN 51524 Teil 2 entspricht. - Vorrichtung nach einem der beiden vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass das Hydrauliköl gefiltert und/oder gekühlt wird, wobei die maximale Öltemperatur vorzugsweise auf 40°C bis 50°C begrenzt wird. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass als Druckmittel entsalztes Wasser verwendet wird.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE502004006574T DE502004006574D1 (de) | 2004-06-03 | 2004-06-03 | Hydraulisches Aufweitverfahren und Vorrichtung dafür |
ES04013164T ES2301898T3 (es) | 2004-06-03 | 2004-06-03 | Procedimiento y dispositivo para ensanchamiento hidraulico. |
EP04013164A EP1604752B1 (de) | 2004-06-03 | 2004-06-03 | Hydraulisches Aufweitverfahren und Vorrichtung dafür |
AT04013164T ATE389478T1 (de) | 2004-06-03 | 2004-06-03 | Hydraulisches aufweitverfahren und vorrichtung dafür |
RU2005116960/06A RU2303500C2 (ru) | 2004-06-03 | 2005-06-02 | Способ гидравлического расширения трубы и устройство для его осуществления, способ определения максимального количества гидравлических расширений трубы |
US11/142,343 US7021150B2 (en) | 2004-06-03 | 2005-06-02 | Device and procedure for hydraulic expansion |
CNB2005100748827A CN1332771C (zh) | 2004-06-03 | 2005-06-03 | 液压膨胀的设备及方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04013164A EP1604752B1 (de) | 2004-06-03 | 2004-06-03 | Hydraulisches Aufweitverfahren und Vorrichtung dafür |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1604752A1 true EP1604752A1 (de) | 2005-12-14 |
EP1604752B1 EP1604752B1 (de) | 2008-03-19 |
Family
ID=34925244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04013164A Expired - Lifetime EP1604752B1 (de) | 2004-06-03 | 2004-06-03 | Hydraulisches Aufweitverfahren und Vorrichtung dafür |
Country Status (7)
Country | Link |
---|---|
US (1) | US7021150B2 (de) |
EP (1) | EP1604752B1 (de) |
CN (1) | CN1332771C (de) |
AT (1) | ATE389478T1 (de) |
DE (1) | DE502004006574D1 (de) |
ES (1) | ES2301898T3 (de) |
RU (1) | RU2303500C2 (de) |
Cited By (1)
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US7977049B2 (en) * | 2002-08-09 | 2011-07-12 | President And Fellows Of Harvard College | Methods and compositions for extending the life span and increasing the stress resistance of cells and organisms |
JP4408873B2 (ja) * | 2006-04-10 | 2010-02-03 | 株式会社スギノマシン | 液圧拡管成形装置 |
CN101823103B (zh) * | 2009-10-30 | 2011-12-28 | 湖北大冶中海换热器有限公司 | 自动控制气动辘管机 |
CN102854061B (zh) * | 2012-07-31 | 2015-07-08 | 清华大学 | 一种含贯穿裂纹管道的加载方法 |
CN103752709B (zh) * | 2013-03-20 | 2016-06-01 | 四川泸天化股份有限公司 | 管子管板胀接方法 |
CN103286231B (zh) * | 2013-06-14 | 2015-05-20 | 哈电集团(秦皇岛)重型装备有限公司 | 厚壁镍基合金换热管与镍基合金管板的胀接工艺 |
CN104874997A (zh) * | 2015-06-15 | 2015-09-02 | 苏州英达瑞机器人科技有限公司 | 辅助穿管机构 |
RU2619007C2 (ru) * | 2015-10-16 | 2017-05-11 | федеральное государственное бюджетное образовательное учреждение высшего образования "Иркутский национальный исследовательский технический университет" (ФГБОУ ВО "ИРНИТУ") | Способ формообразования из трубчатых заготовок деталей с элементами жесткости в виде выворотов |
MX2018014029A (es) * | 2016-05-26 | 2019-04-04 | Dow Global Technologies Llc | Mandril y montaje de soporte. |
CN105822621A (zh) * | 2016-05-26 | 2016-08-03 | 江苏源之翼电气有限公司 | 缸体及活塞的间隙密封系统 |
CN106950114B (zh) * | 2017-03-29 | 2019-07-16 | 中国石油大学(华东) | 单向液压驱动式全裂纹管道断裂模拟实验装置及实验方法 |
JP6990487B2 (ja) * | 2017-07-28 | 2022-01-12 | 三桜工業株式会社 | パイプ端部加工装置 |
CN112264538B (zh) * | 2020-10-16 | 2022-11-01 | 艾森曼热能科技有限公司 | 一种适用于不同规格管件的液压胀管器 |
CN113218795B (zh) * | 2021-05-06 | 2022-07-12 | 湘潭大学 | 一种铅酸电池板栅疲劳寿命模拟检测装置及检测方法 |
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JPS5530376A (en) * | 1978-08-28 | 1980-03-04 | Hitachi Ltd | Method and apparatus for expanding pipe |
DE3105735A1 (de) * | 1981-02-17 | 1982-08-26 | Wilfried 4630 Bochum Busse | Anlage zur druckdichten befestigung eines rohres in einem rohrboden mit hilfe einer druckfluessigkeit |
DE19821807A1 (de) * | 1998-05-15 | 1999-12-02 | Daimler Chrysler Ag | Gebaute Aufweitlanze |
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US5301424A (en) * | 1992-11-30 | 1994-04-12 | Westinghouse Electric Corp. | Method for hydraulically expanding tubular members |
CN2387988Y (zh) * | 1999-08-31 | 2000-07-19 | 攀钢集团煤化工公司 | 液压胀管器 |
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2004
- 2004-06-03 AT AT04013164T patent/ATE389478T1/de not_active IP Right Cessation
- 2004-06-03 DE DE502004006574T patent/DE502004006574D1/de not_active Expired - Lifetime
- 2004-06-03 ES ES04013164T patent/ES2301898T3/es not_active Expired - Lifetime
- 2004-06-03 EP EP04013164A patent/EP1604752B1/de not_active Expired - Lifetime
-
2005
- 2005-06-02 RU RU2005116960/06A patent/RU2303500C2/ru not_active IP Right Cessation
- 2005-06-02 US US11/142,343 patent/US7021150B2/en not_active Expired - Fee Related
- 2005-06-03 CN CNB2005100748827A patent/CN1332771C/zh not_active Expired - Fee Related
Patent Citations (4)
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105246612A (zh) * | 2013-05-24 | 2016-01-13 | 蒂森克虏伯钢铁欧洲股份公司 | 用于制造成型构件的方法和设备 |
CN105246612B (zh) * | 2013-05-24 | 2018-03-13 | 蒂森克虏伯钢铁欧洲股份公司 | 用于制造成型构件的方法和设备 |
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DE502004006574D1 (de) | 2008-04-30 |
ATE389478T1 (de) | 2008-04-15 |
CN1704186A (zh) | 2005-12-07 |
ES2301898T3 (es) | 2008-07-01 |
CN1332771C (zh) | 2007-08-22 |
US7021150B2 (en) | 2006-04-04 |
RU2005116960A (ru) | 2006-12-10 |
EP1604752B1 (de) | 2008-03-19 |
US20060000291A1 (en) | 2006-01-05 |
RU2303500C2 (ru) | 2007-07-27 |
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