WO2007119817A1 - 管の矯正方法およびその矯正方法を用いた管の製造方法 - Google Patents
管の矯正方法およびその矯正方法を用いた管の製造方法 Download PDFInfo
- Publication number
- WO2007119817A1 WO2007119817A1 PCT/JP2007/058157 JP2007058157W WO2007119817A1 WO 2007119817 A1 WO2007119817 A1 WO 2007119817A1 JP 2007058157 W JP2007058157 W JP 2007058157W WO 2007119817 A1 WO2007119817 A1 WO 2007119817A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roll
- pipe
- straightening
- tube
- correction
- Prior art date
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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
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
- B21D3/04—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes skew to the path of the work
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Definitions
- the present invention relates to a method for correcting a tube and a method for manufacturing a tube, in which the bending of the tube in the axial direction and the distortion of the cross section (hereinafter referred to as an ellipse) are suppressed. More specifically, the accuracy of bending correction of the tube is ensured, the generation of ellipses, etc. due to bending correction is suppressed, and the ratio of the flaw detection signal to the base noise in the eddy current flaw detection from the inner surface of the tube (so-called SZN ratio) ) Can be improved, and a method of manufacturing a pipe using the pipe correction method.
- SZN ratio the ratio of the flaw detection signal to the base noise in the eddy current flaw detection from the inner surface of the tube
- U-shaped heat transfer tubes used in heat exchangers such as steam generators and feedwater heaters used in thermal power or nuclear power plants are thin and long heat transfer tubes with an outer diameter of 30 mm or less. It is manufactured by bending it into a letter shape.
- This U-shaped heat transfer tube is used as a pre-use inspection after being installed in a heat exchanger, and as a periodic inspection after being used for a certain period of time, to detect flaws by eddy current testing from the inner surface of the tube. Is done.
- the inspection standard for eddy current flaw detection using this pipe inner surface force is extremely strict because of the need to ensure the safety of nuclear power generation facilities.
- a heat transfer tube is a force produced through cold working and heat treatment such as cold drawing and cold rolling of a raw tube produced by hot extrusion, and cold working and heat treatment as subsequent refining treatments. Later bending and ellipse in the tube axis direction are corrected by a roll straightener.
- the installation space for the heat transfer tubes is narrow, so if the heat transfer tubes are bent, Problems such as buffering to other parts occur when installed in a heat exchanger. Therefore, it is essential to ensure the accuracy of bending correction in the roll straightening machine.
- the configuration of a roll straightening machine used for the finishing process employs an inclined roll type in which a plurality of drum-shaped rolls are combined.
- Inclined roll straightening machines have many configurations depending on the combination of the number, arrangement (vertical and horizontal directions) and arrangement (opposite type, staggered type) of rolls. A roll straightening machine is used.
- FIG. 1 is a view showing an example of a roll arrangement of an inclined roll type straightening machine.
- the roll straightening machine has a plurality of pairs of straightening tools Ra and Rb (collectively referred to as R) arranged opposite to each other in the vertical direction with the rotation axes crossing each other.
- R straightening tools
- three pairs of straightening rolls, Ral and Rbl, Ra2 and Ra2, and Ra3 and Rb3 are arranged opposite to each other, and an auxiliary roll Rc is provided at the exit of the straightening roll.
- a roll straightening machine with such a roll arrangement is called a (2-2-2-1) type straightening machine.
- the facing distance and the crossing angle of the pair of straightening rolls Ral and Rbl can be individually adjusted. Furthermore, the height direction positions of the pair of correction rolls Ra2 and Rb2 adjacent to the pair of correction rolls Ral and Rbl can be individually adjusted.
- the crossing angle ⁇ of the rotation axis of each straightening roll R with respect to the straightened pipe 1, that is, the roll angle, is adjusted so that the surface of the straightening pipe 1 follows the surface of the straightening roll.
- the Rbl facing interval is set slightly smaller than the outer diameter of the straight pipe 1 to be given a crush, and an offset is given by adjusting the crash height of a pair of adjacent straightening rolls Ra2 and Rb2.
- the straightened pipe is made of tool steel or ceramics, and the shape of the surface can straighten the straightened pipe having an outer diameter within a predetermined range. It is formed with a curve that forms a drum shape considering the contact surface between and.
- the heat transfer tubes whose bends and ellipses have been corrected by the roll straightening machine are subjected to pre-shipment inspection by eddy current testing of the inner surface force of the tube after cutting and other processes.
- FIG. 2 is an example of a chart showing the result of eddy current flaw detection with an inner surface force of a heat transfer tube.
- the chart shows a signal S from a standard flaw defined by the inspection standard and a signal N with a constant period P.
- This signal N is called base noise and is the axial direction of the heat transfer tube
- the signal N is made as small as possible in order to prevent erroneous detection as a signal due to detection flaws and to improve inspection efficiency by preventing flaw detection quickly. It is necessary to.
- the ratio of the standard scratch signal S and the signal N is called the “SZN ratio” t.
- the base noise is caused by minute dimensional fluctuations that occur in the axial direction of the heat transfer tube. Therefore, in order to reduce the base noise, dimensional fluctuations such as axial bending and ellipse of the heat transfer tube are suppressed. In other words, it is necessary to improve the dimensional accuracy in the axial direction of the heat transfer tube.
- FIG. 3 is a diagram for explaining the relationship between the roll angle and the travel distance of the tube to be corrected accompanying the setting conditions for roll correction.
- roll angle the angle between the axis of the straight pipe 1 and the rotation center of the straight roll R
- pipe pitch The distance traveled by the straightened roll 1 per rotation of the straightening roll R (hereinafter referred to as “pipe pitch”) M (mm) is defined by the following equation (2).
- FIG. 4 is a diagram for explaining the crash amount among the roll straightening setting conditions.
- the pipe to be straight lb that was loaded with a crush by roll straightening is reduced to an elliptical shape.
- the crash amount ⁇ (mm) is indicated by the difference between the outer diameter d of the straightened pipe la before deformation and the opposing spacing s of the straightening rolls Ra and Rb, and corresponds to the amount of reduction to the outer diameter of the straightened pipe 1.
- the tube 1 is subjected to bending correction by being repeatedly subjected to a reduction over its entire length.
- the crash amount ⁇ (mm) is set by raising and lowering the correction roll Ra.
- FIG. 5 is a diagram for explaining the offset amount among the roll correction setting conditions.
- the offset amount ⁇ (mm) is indicated by the displacement amount of the crush height of the pair of straightening rolls Ra2 and Rb2 at the center, and the bending correction is performed by applying a bending stress to the straightened pipe 1.
- the offset amount ⁇ (mm) is adjusted by setting the crash height by raising the straightening roll Rb2.
- tubes with very good dimensional accuracy before correction such as heat transfer tubes that have been drawn with a high-pressure drawing machine.
- the oval shape after correction becomes larger than the tube cross-sectional shape before correction, and the SZN ratio may deteriorate.
- Japanese Patent Laid-Open No. 61-286025 discloses a tilt-opposing roll correction for the purpose of correcting without deteriorating the roundness of the inner surface of a tube used for a tube of a hydraulic cylinder or the like.
- a correction method is disclosed in which a machine is used to offset the tube and correct the load while applying a predetermined load without substantially crushing the tube.
- Japanese Patent Laid-Open No. 2004-330297 discloses an offset amount of 12 mm or more and a crash amount in order to suppress poor roundness when turning the inner and outer surfaces of a cutting ring used for a bearing race or the like.
- a correction method for obtaining is disclosed.
- JP-A-60-184424 defines the roll offset amount and the crash amount from the relationship between the index representing the plastic region of the pipe and the offset amount and crash amount obtained in advance. Disclosed is a method for improving tube bending and roundness by setting the roll position and correcting the tube! Speak.
- the correction method proposed in the above-mentioned Japanese Patent Laid-Open Nos. 61-286025, 2004-330297, and 60-184424 is based on the SZN in eddy current flaw detection with a pipe inner surface force. It is not intended to correct ellipses or bends in the tube axis direction in order to improve the ratio.
- Japanese Patent Laid-Open No. 2000-317521 discloses at least the outer layer force of the roll body SjIS K
- Hardness by spring hardness test (A type) specified in 6301: Hs 50 ⁇ : By using a straightening roll made of LOO elastic body, it is inspected by high and SZN ratio in eddy current flaw detection of pipe inner surface force A method of manufacturing a heat transfer tube that can be used is disclosed.
- the present invention has been made in view of the problem related to the correction of the pipe subjected to such an internal eddy current flaw detection, and appropriately manages the correction processing as the refining process after the cold processing of the pipe. Therefore, it is possible to ensure the accuracy of pipe bending correction, suppress the occurrence of dimensional fluctuations such as ellipse due to bending correction, and improve the SZN ratio in eddy current flaw detection of pipe inner surface force and It aims at providing the manufacturing method of the pipe
- the SZN ratio is calculated by eddy current flaw detection on the inner surface of the tube under the condition of a frequency of 550kHz and self-comparison, and by dividing the total length of the tube by 1 foot using a 0.666mm ⁇ through drill hole as a standard flaw. The lowest value of the SZN ratio obtained as described above was taken as the S / N ratio of the pipe.
- the present invention has been completed on the basis of the above findings, and the gist of the present invention is the following (1) method for correcting a tube and (2) a method for manufacturing a tube.
- the outer diameter of the pipe is d (mm)
- the stand distance of the roll straightening machine is L (mm)
- the offset amount is
- FIG. 1 is a diagram showing an example of a roll arrangement of an inclined roll type straightening machine.
- FIG. 2 is an example of a chart showing the results of eddy current flaw detection with the inner surface force of the heat transfer tube.
- Fig. 3 is a diagram for explaining the relationship between the roll angle and the travel distance of the pipe to be corrected, among the setting conditions for roll correction.
- FIG. 4 is a diagram for explaining the crash amount among the setting conditions for roll straightening.
- FIG. 5 is a diagram for explaining the offset amount among the roll straightening setting conditions.
- FIG. 6 is a diagram for explaining 7? Defined in the present invention.
- FIG. 7 is a graph showing the relationship between the SZN ratio in the vortex flaw detection from the tube 7 and the tube inner surface obtained in the example.
- the straightening method of the present invention straightens a tube using a roll straightening machine provided with a plurality of drum-shaped straightening roll pairs arranged opposite to each other in the vertical direction with the directions of the rotation axes intersecting each other. Therefore, at least three pairs of straightening rolls on the exit side of the roll straightening machine are targeted. In order to specify 7 ?, which will be described later, it is necessary to obtain an arc R corresponding to the radius of curvature at three points, so the final three straight rolls on the delivery side were targeted.
- the three pairs of straightening rolls on the exit side of the roll straightening machine have at least the outer layer force of the roll body as determined by the spring hardness test (type A) according to SJIS K 6301.
- Hs (hereinafter referred to as hardness Hs) is 50 or more: It is necessary to be formed of a LOO elastic body.
- the range of the hardness Hs of the elastic body is defined because if the hardness Hs of the elastic body is 50 or less, the bending of the tube cannot be sufficiently corrected, and if the hardness Hs becomes 100 or more, This is due to the fact that the dimensional variation of the tube after correction becomes large.
- the straightening roll employed in the present invention is not particularly limited as long as the hardness Hs is an elastic body within a specified range, but is preferably a urethane rubber excellent in wear resistance.
- the S ZN ratio in eddy current flaw detection from the inner surface of the tube is improved to some extent by applying a straightening roll with at least the outer layer made of an elastic material.
- a straightening roll with at least the outer layer made of an elastic material it is necessary to make the setting conditions of the straightening roll during straightening, especially the offset amount appropriate.
- the offset amount ⁇ can be expressed as ⁇ given to the pipe during the roll correction process.
- the correction method of the present invention is formed by three pairs of straightening rolls on the exit side, which are formed at three positions corresponding to the tube axis center at the crossing position of the upper and lower straightening rolls, and are defined by the following formula (1): is the 7? is 1. it is necessary to impart 0 X 10 one 3 - 1. offset amount to be 5 X 10- 3 to the tube.
- the outer diameter of the pipe d (mm)
- the stand distance of the roll straightener is L (mm)
- the offset is ⁇ (mm)
- R ( ⁇ 2 + L 2 )
- the relationship is / 2 ⁇ .
- FIG. 6 is a diagram for explaining 7? Defined in the present invention. Since 7? Defined in the present invention is defined by the arc R defined by giving the stand distance L and the offset amount ⁇ and the outer diameter d of the pipe to be corrected, it is also applied for each outer diameter of the pipe. It is necessary to manage according to the roll straightening machine.
- a roll corrector comprising three pairs of straightening rolls, which are configured with a stand distance L and an offset amount ⁇ , and are opposed to each other in the vertical direction with the axial directions crossing each other.
- the three pairs of straightening rolls are arranged L (mm) apart on the entry side (Ral, Rbl), center (Ra2, Rb2) and exit side (Ra3, Rb3), respectively.
- center roll pair (Ra2, Rb2) is set so as to be displaced in the vertical direction with the input side roll pair (Ral, Rbl) and the output side (Ra3, Rb3) force positioned at the same height.
- R 2 -L 2 (R- ⁇ ) 2 ⁇ ⁇ ⁇ (3)
- An offset amount to be 5 X 10- 3 are to be applied to the tube. If ⁇ is within the above range, the accuracy of bending correction of the tube can be ensured, the dimensional fluctuation accompanying bending correction can be suppressed, and the SZN ratio in eddy current flaw detection with a tube inner surface force can be improved.
- the target value of the SZN ratio in the eddy current flaw detection of the tube inner surface force is set to 30 or more, and r? Defined by the above equation (1) is 1.0 X 10 1 3 to 1 It is preferable because the SZN ratio can be increased to 50 or more by vortex flaw detection on the pipe inner surface by giving the pipe an offset amount of 35 X 10-3.
- the straightening roll angle ⁇ and the crash amount ⁇ which are the setting conditions, cannot be determined unequivocally because the appropriate values differ depending on the dimensions and material of the straightened tube. Is preferably set in the range of 30 ° to 33 ° and the crash amount ⁇ in the range of 2 to 3.5 mm.
- the method of manufacturing the straightened tube is not particularly limited. However, the better the dimensional accuracy of the tube before straightening, the more the dimensional change such as the ellipse of the tube after straightening. Since the SZN ratio in the eddy current flaw detection with the inner surface force of the pipe is reduced, the straight pipe is manufactured with multiple cold rollings with a reduced degree of processing or high pressure drawing machine. It is preferable to use cold drawing.
- the manufacturing method of the present invention is characterized in that at least the final roll correction in the manufacturing process of the tube is performed by the correction method of the present invention, and this requires eddy current testing of the tube inner surface force. It is suitable for heat transfer tubes used for heat exchange such as nuclear steam generators and water heaters.
- the roll straightening machine adopts the 7-roll (2-2-2-2-1) type straightening machine shown in Fig. 1 above, and the three pairs of straightening rolls on the outlet side are made of urethane resin with spring hardness Hs of 95. A coated roll was employed.
- ASME SB-163 UNS NO 6690 Ni-based alloy was used as the test material, and the finished dimensions were outer diameter 19. 14 mm X wall thickness 1. 125 mm X length 10000 mm by cold drawing using a high-pressure drawing machine (Hereinafter simply referred to as “19 ⁇ ”) and an outer diameter of 16.03 mm X thickness 1.0 mm X length 10000 mm (hereinafter simply referred to as “16 ⁇ ”) were prepared.
- the stand distance L of the roll straightening machine was set to 350 mm, and the setting conditions were a constant roll angle ⁇ and crash amount ⁇ , and an offset amount ⁇ of 6 mm to: L lmm varied in range 7? a 0. 78 X 10 _3 ⁇ 1. were changes in the range of 72 X 10- 3. Specific setting conditions are shown in Table 2 and Table 3.
- Table 2 shows the observation results of the bending situation and the calculated SZN ratio when 19 ⁇ material is used as the specimen. Note that the evaluation criteria and SZN ratio of the bending situation shown in Table 2 were the same as those described in Table 1 above.
- Table 3 shows the observation results of the bending situation and the calculated SZN ratio when a 16 ⁇ material was used as the specimen.
- the evaluation criteria and SZN ratio of the bending situation shown in Table 3 were the same as those described in Table 1 above. However, the frequency of eddy current testing was changed to 750 kHz.
- FIG. 7 is a diagram showing the relationship between ⁇ obtained in the example and the SZN ratio in eddy current flaw detection from the inner surface of the tube. Regardless of whether the specimen is 19 ⁇ or 16 ⁇ , if 7? Is within the range stipulated in the present invention, S It was confirmed that the / N ratio could be increased to 30 or more. Furthermore, it was confirmed that the SZN ratio in 7? And eddy current flaw detection from the inner surface of the pipe was almost unaffected by the pipe dimensions when the finished dimensions to which the heat transfer tube was applied were less than 30 mm in outer diameter. . Industrial applicability
- the outer layer portion of the correction roll is formed of an elastic body, and the offset amount is set appropriately to ensure the accuracy of pipe bending correction. It is possible to suppress the generation of ellipses, etc. due to bending correction, and to improve the SZN ratio in eddy current flaw detection from the inner surface of the tube, so that the inspection efficiency can be improved. This ensures high quality accuracy in heat transfer tubes used for heat exchange such as steam generators and feedwater heaters used in thermal power or nuclear power plants. Can be used.
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Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008511003A JP4807409B2 (ja) | 2006-04-14 | 2007-04-13 | 管の矯正方法およびその矯正方法を用いた管の製造方法 |
CN2007800134409A CN101421059B (zh) | 2006-04-14 | 2007-04-13 | 管的矫正方法及使用该矫正方法的管的制造方法 |
CA2648714A CA2648714C (en) | 2006-04-14 | 2007-04-13 | Process for straightening tube and method for producing tube therewith |
EP07741593.3A EP2018911B1 (en) | 2006-04-14 | 2007-04-13 | Method for correcting pipe and method for producing pipe by using that correction method |
US12/247,912 US7654122B2 (en) | 2006-04-14 | 2008-10-08 | Process for straightening a tube |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-111893 | 2006-04-14 | ||
JP2006111893 | 2006-04-14 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/247,912 Continuation US7654122B2 (en) | 2006-04-14 | 2008-10-08 | Process for straightening a tube |
Publications (1)
Publication Number | Publication Date |
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WO2007119817A1 true WO2007119817A1 (ja) | 2007-10-25 |
Family
ID=38609577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/058157 WO2007119817A1 (ja) | 2006-04-14 | 2007-04-13 | 管の矯正方法およびその矯正方法を用いた管の製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7654122B2 (ja) |
EP (1) | EP2018911B1 (ja) |
JP (1) | JP4807409B2 (ja) |
CN (1) | CN101421059B (ja) |
CA (1) | CA2648714C (ja) |
WO (1) | WO2007119817A1 (ja) |
Cited By (4)
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JP2009285705A (ja) * | 2008-05-30 | 2009-12-10 | Jfe Steel Corp | 耐座屈性能に優れる電縫管の製造方法 |
WO2012001882A1 (ja) | 2010-06-28 | 2012-01-05 | 住友金属工業株式会社 | 蒸気発生器用伝熱管およびその製造方法 |
CN113275416A (zh) * | 2021-03-24 | 2021-08-20 | 浙江田中精机股份有限公司 | 一种电子元件的单气缸整形机构 |
CN113414632A (zh) * | 2021-07-24 | 2021-09-21 | 大连长丰实业总公司 | 一种棒类零件车削加工前中轴线的校正装置 |
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DE102008059108A1 (de) * | 2008-10-16 | 2010-04-22 | Sms Meer Gmbh | Verfahren und Vorrichtung zum Richten von Rohren auf einem Expander |
JP5077488B2 (ja) * | 2010-03-29 | 2012-11-21 | 住友金属工業株式会社 | 管の矯正方法 |
CN101927278B (zh) * | 2010-06-03 | 2012-11-07 | 天津商业大学 | 采用六辊矫直机实现薄壁无缝钢管精密矫直的方法 |
US8794083B2 (en) | 2010-07-12 | 2014-08-05 | General Electric Company | Low row steam generator inspection probe |
JP5462202B2 (ja) * | 2011-02-14 | 2014-04-02 | 新日鐵住金株式会社 | 曲がり矯正方法 |
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US9138792B2 (en) | 2013-09-06 | 2015-09-22 | The Boeing Company | Automated tube straightening apparatus |
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JP7036215B2 (ja) * | 2018-08-09 | 2022-03-15 | 日本製鉄株式会社 | 曲がり矯正方法 |
MX2021012953A (es) * | 2019-04-23 | 2021-11-25 | Jfe Steel Corp | Maquina enderezadora de laminacion y metodo de fabricacion de una tuberia o tubo o una barra utilizando la misma. |
CN112718929A (zh) * | 2020-12-10 | 2021-04-30 | 中国重型机械研究院股份公司 | 一种组合式圆材矫直装置及其矫直方法 |
CN112718928A (zh) * | 2020-12-10 | 2021-04-30 | 中国重型机械研究院股份公司 | 一种圆材矫直装置及其矫直方法 |
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- 2007-04-13 WO PCT/JP2007/058157 patent/WO2007119817A1/ja active Application Filing
- 2007-04-13 CN CN2007800134409A patent/CN101421059B/zh not_active Expired - Fee Related
- 2007-04-13 CA CA2648714A patent/CA2648714C/en not_active Expired - Fee Related
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2008
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JP2009285705A (ja) * | 2008-05-30 | 2009-12-10 | Jfe Steel Corp | 耐座屈性能に優れる電縫管の製造方法 |
WO2012001882A1 (ja) | 2010-06-28 | 2012-01-05 | 住友金属工業株式会社 | 蒸気発生器用伝熱管およびその製造方法 |
JP5378522B2 (ja) * | 2010-06-28 | 2013-12-25 | 新日鐵住金株式会社 | 蒸気発生器用伝熱管の製造方法 |
EP2587206A4 (en) * | 2010-06-28 | 2014-10-08 | Nippon Steel & Sumitomo Metal Corp | Heat transfer tube for steam generator and method of production thereof |
KR101503612B1 (ko) * | 2010-06-28 | 2015-03-18 | 신닛테츠스미킨 카부시키카이샤 | 증기 발생기용 전열관 및 그 제조 방법 |
US10488038B2 (en) | 2010-06-28 | 2019-11-26 | Nippon Steel Corporation | Method for producing a heat transfer tube for steam generator using drawing, solution heat treatment, and straightening |
CN113275416A (zh) * | 2021-03-24 | 2021-08-20 | 浙江田中精机股份有限公司 | 一种电子元件的单气缸整形机构 |
CN113275416B (zh) * | 2021-03-24 | 2022-11-25 | 浙江田中精机股份有限公司 | 一种电子元件的单气缸整形机构 |
CN113414632A (zh) * | 2021-07-24 | 2021-09-21 | 大连长丰实业总公司 | 一种棒类零件车削加工前中轴线的校正装置 |
CN113414632B (zh) * | 2021-07-24 | 2024-05-14 | 大连长丰实业总公司 | 一种棒类零件车削加工前中轴线的校正装置 |
Also Published As
Publication number | Publication date |
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JP4807409B2 (ja) | 2011-11-02 |
US7654122B2 (en) | 2010-02-02 |
EP2018911A1 (en) | 2009-01-28 |
CA2648714A1 (en) | 2007-10-25 |
CN101421059A (zh) | 2009-04-29 |
EP2018911B1 (en) | 2020-05-27 |
CA2648714C (en) | 2011-01-18 |
US20090064752A1 (en) | 2009-03-12 |
JPWO2007119817A1 (ja) | 2009-08-27 |
EP2018911A4 (en) | 2012-12-05 |
CN101421059B (zh) | 2010-08-18 |
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