EP3288695A1 - VERFAHREN ZUM INDUKTIONSBIEGEUMFORMEN EINES DRUCKFESTEN ROHRS MIT GROßER WANDSTÄRKE UND GROßEM DURCHMESSER - Google Patents
VERFAHREN ZUM INDUKTIONSBIEGEUMFORMEN EINES DRUCKFESTEN ROHRS MIT GROßER WANDSTÄRKE UND GROßEM DURCHMESSERInfo
- Publication number
- EP3288695A1 EP3288695A1 EP16736773.9A EP16736773A EP3288695A1 EP 3288695 A1 EP3288695 A1 EP 3288695A1 EP 16736773 A EP16736773 A EP 16736773A EP 3288695 A1 EP3288695 A1 EP 3288695A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- inductor
- tube
- bending
- phase
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000006698 induction Effects 0.000 title claims abstract description 12
- 230000006835 compression Effects 0.000 title abstract 2
- 238000007906 compression Methods 0.000 title abstract 2
- 238000005452 bending Methods 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000012998 induction bending Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/04—Bending rods, profiles, or tubes over a movably-arranged forming menber
-
- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/006—Feeding elongated articles, such as tubes, bars, or profiles
-
- 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
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/162—Heating equipment
Definitions
- the invention relates to a method for induction bending forming a pressure-resistant tube with large wall thickness and large diameter, in particular on a power plant and pipeline pipe, having the features of the preamble of claim 1.
- tubes of steel are required, which have a large wall thickness to withstand the stresses.
- Such requirements apply, for example, to the transport of superheated steam in power plants, where pipe bends are required to adapt the pipelines to the structural conditions, or for the transport of crude oil in pipelines over long distances, where compensators, so-called lye arcs, are used at regular intervals, to compensate for thermal changes in length.
- a large opening cross-section and accordingly a large pipe outside diameter is required.
- Tubes to which the present method pertains usually have nominal diameters greater than 300 mm and a diameter to wall thickness ratio of from 10: 1 to 100: 1, typically from 20: 1 to 70: 1.
- Such a method for induction bending forming has long been known, for example, from DE 2513561 A1 and has been continuously improved to despite the enormous dimensions to produce very dimensionally stable pipe bends.
- the transformation of such massive tubes succeeds only by inductive heating of a narrow annular zone up to a forming temperature above 850 ° C.
- structural changes occur in the material, which is usually fine-grained steel.
- the pipe bend is often subsequently heat treated at a temperature of about 600 ° C.
- the straight pipe sections that connect before and after the pipe bend and are also called tangents are also affected by the subsequent heat treatment.
- the object of the present invention is thus to improve the method of the type mentioned above so that negative influences of the forming process on the strength values of the material in the adjacent to the pipe bend tangents are avoided.
- the solution according to the invention is based on subjecting the tangents in front of and behind the bend to an exactly same heat treatment as the section of the tube must undergo during bending during the deformation, ie to guide the tangents through the induction device at the same throughput speed as in the case of FIG to be bent pipe section, and also apply the same temperature in the induction device as well as the same cooling parameters subsequently.
- the difference in the passage of the tangents is therefore only that the tube is not clamped in the bending buckle during the treatment of the tangent and therefore have no counter-forces during the feed.
- the sole clamping at the rear end of the tube without further support makes it possible to operate independently of the clamping of the front end in the bending buckle, and further allows to move the inductor unhindered by support means along the tube wall in the direction of the rear end.
- FIG. 1 shows an induction tube bending device in a schematic view.
- Fig. 2a - 2d each show the induction tube bending device in different positions during the implementation of the method.
- FIG. 1 shows an induction tube bending device 100, which comprises a stationary machine bed 10, on which a holding device 11 for a tube 1 is arranged.
- the holding device 11 engages the tube 1 at its rear end and clamps it firmly.
- the holding device 1 1 in the direction of a pipe center axis 2, which at the same time indicates the feed direction, relative to the machine bed 10 slidably.
- the feed takes place via a hydraulic unit 12.
- An induction device comprises an annular inductor 20, which is positioned with its center in the region of the tube center axis 2. According to the invention, a linear adjusting device 21 is provided in order to be able to move the inductor 20 relative to the machine bed 10.
- a bending arm 30 is pivotally mounted on a vertical bending axis 32, wherein the distance of the bending axis 32 can be adjusted perpendicular to the tube center axis 2 to specify the desired bending radius.
- a bending lock 31 is arranged, with which the tube 1 can be gripped and clamped.
- a cooling device 40 is arranged, with the z. B. with water, a cooling of the surface temperature is effected as soon as the corresponding length section has emerged from the forming zone.
- sensors for receiving the path and speed of the tube 1 and the inductor ring 20 are provided and control modules in a control unit with which the paths and speed and the connection and disconnection of the inductor are brought into the inventively provided relationships.
- FIGS. 2a to 2d show various stages during the execution of the method.
- FIG. 3 shows the times or phases t1 to t6 associated with the representations in FIGS. 2a to 2d in a diagram in which the upper graph indicates the speed of the feed device or the longitudinal advance v R of the tube 1 over the path and the lower one Graph the travel speed vi of the inductor over the path. Positive speed values correspond to a movement in the feed direction; negative values indicate an opposite movement.
- the front pipe end is pushed into the inductor ring 20, which is located at its axial starting position. Unlike induction bending of the prior art, this is front pipe end, which also later forms the front tangent 3 on the deformed pipe bend, not yet fixed in the bending lock 31.
- the induction device 20 and the cooling device are switched on and the axial feed of the tube 1 takes place in a first phase (see FIG. 3) with a constant tube feed speed v R. This is typically 3 mm - 200 mm per minute.
- v R tube feed speed
- v R constant tube feed speed
- the bending lock 31 on the bending arm 30 must grip and clamp the tube 1, so that the forces that lead to the bending can be introduced.
- the closing of the flexure 31 and the application of the clamping forces takes a certain amount of time.
- the bending arm 30 with its bending buckle 31 but on the other hand can not be moved parallel to the feed of the tube 1, because the design effort for such a longitudinal displacement of the bearing of the bending arm 30 would be much too high and because then also the distance of the flexure 31 of the Heating zone on the inductor ring 20 would change.
- the bending buckle 31 With the standstill of the tube 1, the bending buckle 31 can be closed, as Figure 2b shows. Meanwhile, the inductor 20 performs its opposite movement with constant travel speed vi.
- the inductor speed Vi is returned to zero in the phase t3 and at the same time the tube feed speed v R of the tube 1 is increased linearly.
- the inductor 20 moves during the phase t3 back to its original position, which corresponds to the working position for the bending operation.
- the initial point of the bend which is present at the end of the phase t3, can lie arbitrarily on the longitudinal axis 2 of the pipe 1.
- the operations described above must be started with a precisely calculated fore-run so that a given axial pipe position for the beginning of the bend is reached when the bend is started.
- the induction bending process known per se is used to produce a pipe bend 4 with a constant pipe feed speed V R and a stationary inductor 20, as shown in FIG. 2c.
- the tube feed is gradually decelerated at the speed v R in phase t5 and at the same time starts the opposite movement of the inductor 20, with such a travel speed Vi, that the relative movement between the tube 1 and inductor 20 remains constant.
- the residence time of each longitudinal section of the tube 1 in the traveling heat-affected zone also remains constant.
- the bending lock 31 can be opened.
- the tube 1 is now completely unhindered by the bending arm 30th
- the inductor 20 can easily in phase t6 at a constant speed Vi up to his Machine bed 10 facing end position are moved, see Figure 2d. There, the inductor 20 is then stopped and turned off the induction device.
- the non-heat-treated residual piece on the tube 1 is characterized and separated directly, but at the latest after the heat treatment of the pipe bend 3 thus produced with its end-side tangent sections 3, 4th
- phase t7 in the same way as in phase t3, the longitudinal feed of the tube 1 are gradually absorbed and the inductor 20 is returned to its initial position.
- phase t8 at a constant pipe advance speed v R, the heat treatment of the tangent 5 can be continued as long as necessary to obtain a sufficiently long, heat-treated tangent 5.
- the flexure 31 is uninvolved in this phase.
- the phase t8 thus corresponds to the phase t1.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL16736773T PL3288695T3 (pl) | 2015-04-28 | 2016-04-21 | Sposób gięcia indukcyjnego rury wytrzymałej na ściskanie, o dużej grubości ścianki i dużej średnicy |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015106570.3A DE102015106570B4 (de) | 2015-04-28 | 2015-04-28 | Verfahren zum Induktionsbiegeumformen eines druckfesten Rohrs mit großer Wandstärke und großem Durchmesser |
PCT/DE2016/100188 WO2016173583A1 (de) | 2015-04-28 | 2016-04-21 | VERFAHREN ZUM INDUKTIONSBIEGEUMFORMEN EINES DRUCKFESTEN ROHRS MIT GROßER WANDSTÄRKE UND GROßEM DURCHMESSER |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3288695A1 true EP3288695A1 (de) | 2018-03-07 |
EP3288695B1 EP3288695B1 (de) | 2018-09-12 |
Family
ID=56403926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16736773.9A Active EP3288695B1 (de) | 2015-04-28 | 2016-04-21 | Verfahren zum induktionsbiegeumformen eines druckfesten rohrs mit grosser wandstärke und grossem durchmesser |
Country Status (13)
Country | Link |
---|---|
US (1) | US10478880B2 (de) |
EP (1) | EP3288695B1 (de) |
JP (1) | JP2018514386A (de) |
KR (1) | KR101986030B1 (de) |
CN (1) | CN107073543B (de) |
BR (1) | BR112017007165B1 (de) |
CA (1) | CA2965580C (de) |
DE (1) | DE102015106570B4 (de) |
MX (1) | MX2017004427A (de) |
PL (1) | PL3288695T3 (de) |
RU (1) | RU2636427C1 (de) |
SG (1) | SG11201704990YA (de) |
WO (1) | WO2016173583A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11414723B2 (en) * | 2018-05-21 | 2022-08-16 | Welspun Corp Limited | Systems and methods for producing hot induction pipe bends with homogeneous metallurgical and mechanical properties |
SG10201907808VA (en) * | 2018-09-05 | 2020-04-29 | Blm Spa | Machine for the working of tubes provided with a device for detecting any slippage of the tube being worked |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL165667C (nl) * | 1976-09-03 | 1981-05-15 | Cojafex | Werkwijze en inrichting voor het continu voortschrijdend buigen van langgerekte voorwerpen, zoals buizen. |
WO1985000023A1 (en) * | 1983-06-16 | 1985-01-03 | Enaco (Australia) Pty. Ltd. | Pipe deforming method and apparatus |
JPS6182452A (ja) | 1984-09-29 | 1986-04-26 | Nec Kansai Ltd | 電子部品の製造方法 |
JP3195082B2 (ja) * | 1992-12-17 | 2001-08-06 | マツダ株式会社 | 金属部材の曲げ加工装置 |
RU2062156C1 (ru) * | 1993-11-26 | 1996-06-20 | Научно-исследовательский институт авиационной технологии и организации производства | Способ гибки металлических труб |
UA26284C2 (uk) * | 1995-06-14 | 1999-07-19 | Виробничо-Науковий Центр "Трубосталь" | Спосіб гhуття труб |
JP3400767B2 (ja) * | 2000-02-28 | 2003-04-28 | 徹 佐藤 | 鋼管曲げ加工装置及び方法 |
KR100878647B1 (ko) * | 2005-03-03 | 2009-01-15 | 수미도모 메탈 인더스트리즈, 리미티드 | 금속재의 굽힘 가공 방법, 굽힘 가공 장치 및 굽힘 가공 설비열, 및 그것들을 이용한 굽힘 가공제품 |
JP2008013004A (ja) * | 2006-07-04 | 2008-01-24 | Fuji Heavy Ind Ltd | 芳香発生による運転支援システム |
JP4941054B2 (ja) * | 2007-03-30 | 2012-05-30 | 住友金属工業株式会社 | 継目無ベンド管の製造方法並びに溶接継手及びその製造方法 |
JP2009233731A (ja) * | 2008-03-28 | 2009-10-15 | Tokyo Metropolitan Univ | 金属管の結晶粒微細化装置及び金属管の結晶粒微細化方法 |
MX2011012244A (es) * | 2009-05-19 | 2012-02-28 | Sumitomo Pipe & Tube Co Ltd | Aparato doblador. |
PT2359949E (pt) * | 2009-07-14 | 2014-01-23 | Nippon Steel & Sumitomo Metal Corp | Dispositivo e método para fabricar membro dobrado |
WO2011083816A1 (ja) * | 2010-01-06 | 2011-07-14 | 住友金属工業株式会社 | 屈曲部材の製造方法および製造装置 |
DE102010020360B4 (de) | 2010-05-13 | 2016-06-16 | AWS Schäfer Technologie GmbH | Biegemaschine für linke und rechte Biegungen |
US9421234B2 (en) * | 2011-05-20 | 2016-08-23 | Nutramax Laboratories, Inc. | Orally administrable compositions comprising avocado/soybean unsaponifiables and lipoic acid and methods of administration |
JP6182452B2 (ja) * | 2013-12-25 | 2017-08-16 | 東洋ゴム工業株式会社 | 非空気圧タイヤ |
-
2015
- 2015-04-28 DE DE102015106570.3A patent/DE102015106570B4/de not_active Expired - Fee Related
-
2016
- 2016-04-21 CA CA2965580A patent/CA2965580C/en active Active
- 2016-04-21 PL PL16736773T patent/PL3288695T3/pl unknown
- 2016-04-21 EP EP16736773.9A patent/EP3288695B1/de active Active
- 2016-04-21 RU RU2017104217A patent/RU2636427C1/ru active
- 2016-04-21 CN CN201680003354.9A patent/CN107073543B/zh not_active Expired - Fee Related
- 2016-04-21 KR KR1020177014884A patent/KR101986030B1/ko active IP Right Grant
- 2016-04-21 WO PCT/DE2016/100188 patent/WO2016173583A1/de active Application Filing
- 2016-04-21 BR BR112017007165-7A patent/BR112017007165B1/pt not_active IP Right Cessation
- 2016-04-21 SG SG11201704990YA patent/SG11201704990YA/en unknown
- 2016-04-21 JP JP2017535406A patent/JP2018514386A/ja active Pending
- 2016-04-21 MX MX2017004427A patent/MX2017004427A/es active IP Right Grant
- 2016-04-21 US US15/521,333 patent/US10478880B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
PL3288695T3 (pl) | 2019-05-31 |
DE102015106570B4 (de) | 2016-12-15 |
MX2017004427A (es) | 2017-10-04 |
CA2965580C (en) | 2020-04-28 |
CN107073543B (zh) | 2019-01-15 |
JP2018514386A (ja) | 2018-06-07 |
CN107073543A (zh) | 2017-08-18 |
BR112017007165B1 (pt) | 2021-01-26 |
WO2016173583A1 (de) | 2016-11-03 |
US20180036780A1 (en) | 2018-02-08 |
KR20170138389A (ko) | 2017-12-15 |
DE102015106570A1 (de) | 2016-11-03 |
BR112017007165A2 (pt) | 2017-12-26 |
EP3288695B1 (de) | 2018-09-12 |
RU2636427C1 (ru) | 2017-11-23 |
SG11201704990YA (en) | 2017-07-28 |
KR101986030B1 (ko) | 2019-09-03 |
US10478880B2 (en) | 2019-11-19 |
CA2965580A1 (en) | 2016-11-03 |
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