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WO2008008001A1 - Procédé pour former un filetage externe dans la partie d'extrémité d'un blanc tubulaire - Google Patents

Procédé pour former un filetage externe dans la partie d'extrémité d'un blanc tubulaire Download PDF

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Publication number
WO2008008001A1
WO2008008001A1 PCT/RU2007/000360 RU2007000360W WO2008008001A1 WO 2008008001 A1 WO2008008001 A1 WO 2008008001A1 RU 2007000360 W RU2007000360 W RU 2007000360W WO 2008008001 A1 WO2008008001 A1 WO 2008008001A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
diameter
threaded
forming
outer diameter
Prior art date
Application number
PCT/RU2007/000360
Other languages
English (en)
Russian (ru)
Inventor
Albert Sergeevich Ezhev
Original Assignee
Nauchno-Vnedrencheskiy Tsentr Mashiny I Oborudovanie Dlya Energetiki'
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nauchno-Vnedrencheskiy Tsentr Mashiny I Oborudovanie Dlya Energetiki' filed Critical Nauchno-Vnedrencheskiy Tsentr Mashiny I Oborudovanie Dlya Energetiki'
Publication of WO2008008001A1 publication Critical patent/WO2008008001A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/56—Making machine elements screw-threaded elements

Definitions

  • the invention relates to the field of manufacturing pipe products by pressure machining methods, and more particularly, to forming an external thread at an end portion of a pipe billet, preferably at the nipple end of a sub for tubing.
  • a tubing with an external thread at the nipple end obtained by a cutting method is known (see US 2006/0118340 Al, U.S. C1. 175/320, published on 08.06.2006.).
  • a tubing is a critical part, loaded during operation by internal pressure and external forces that cause bending and tension in it. The strength and durability of such a pipe largely depends on the quality of the thread.
  • the thread obtained by cutting is a stress concentrator, the metal structure in the thread zone has cut fibers, which reduces the strength characteristics of the part.
  • a known method of forming an external thread at the end of a pipe billet by knurling with threaded rollers (see RU 2253532 Cl 5 B21HZ / 02, 02.04.2004.).
  • This method is free from the drawbacks of the previous method of producing thread by cutting, since the strain hardening of the surface layer during knurling, as well as the preservation of the fibrous structure of the metal structure increase the cyclic strength of such threaded joints in comparison with the thread obtained by cutting the metal.
  • the disadvantages of this method of thread formation include a small range of rolled threads (up to 35 mm), low productivity and the presence of slippage of the workpiece during rolling, which reduces the quality of the resulting thread and its durability during operation.
  • a known method of forming an external thread on a tubular workpiece of a part used in sub for tubing comprising placing a tubular workpiece in a matrix with a threaded hole corresponding to the required parameters of the resulting thread and distributing from the inside of the specified tubular workpiece, mainly by the method of “large magnetoforming”, giving a thin wavy wall close to the thread profile, both from the inside and from the outside (see RU 2259459 C2, 7 B21D 51/10, publ. 08.27.2005).
  • This method is the closest analogue of the claimed invention in terms of features (prototype).
  • the disadvantages of the prototype should include a limited area of use - only for the formation of threads on thin-walled (up to 0.5 mm) tube blanks, while the wall of the tube blank takes on a wavy shape over the entire cross section.
  • the resulting wavy thin-walled products are used only as threaded spacers in threaded connections of tubing. It should be noted that full threaded grooves on the outer surface of both pipes and sub for tubing cannot be obtained in this way.
  • D n is the diameter of the punch
  • the positive effect of the use of the invention can be enhanced due to the fact that: a conical punch is made with a taper angle of 2 - 3 °; grease is applied to the threaded grooves of the die and the surface of the punch; Before plastic deformation, the preform is heated to a temperature below the temperature of the onset of scale formation, and the thread is formed in the semi-hot stamping mode. Threading can be carried out with using a retaining ring, the inner diameter of which is larger than the diameter of the calibrating punch belt by the amount of the gap, which ensures the flow of excess metal after filling the profile of the threaded matrix.
  • FIG. 1 - 2 shows the initial billet and technological equipment for forming a thread according to the method in question in the initial position
  • Fig. 2 - a part with a molded thread, as well as technological equipment for forming a thread according to the method in question in the final position.
  • the pipe billet 1 end (nipple) section is placed inside the threaded matrix 2 having a thread profile corresponding to the required parameters of the resulting thread.
  • a conical punch 3 is inserted with a calibrating girdle 4, the diameter of which is equal to the inner diameter of the finished part 5.
  • the threaded matrix 2 can be mounted on the retaining ring 6.
  • the preform for the external thread is preliminarily prepared with an outer diameter of the end portion equal to the inner diameter of the threaded matrix and the inner diameter determined from the above
  • This mathematical expression is obtained by calculation, based on the assumption that all threaded grooves in the threaded matrix are completely filled due to the displaceable volume of the workpiece with radial metal flow in stamping process. In fact, metal flows in both radial and axial directions. Therefore, in some cases, an additional displaced volume may be provided, for example, by reducing the inner diameter, established experimentally.
  • the workpiece 1, made with the above parameters of the end section is placed inside the threaded matrix 2, a conical punch 3 is inserted into the workpiece 1 with a calibrating belt 4, and the end section of the workpiece 1 is distributed on a press (not shown) in one pass with the metal being redistributed into threaded grooves of the die 2.
  • the workpiece 1 before plastic deformation can be heated to a temperature below the temperature of the onset of scale formation, and thread formation in this case is carried out in the mode of semi-hot stamping.
  • the thread formation can also be carried out using the retaining ring 6 to create an annular gap between the inner surface of the retaining ring and the outer surface of the calibrating girdle 4 of the punch 3, where the excess metal of the workpiece is forced out after the threaded grooves of the matrix 2 are completely filled (see Fig. 2).
  • the threaded matrix 2 can be made detachable to facilitate removal of the finished part 5 from it.
  • the technical result is to obtain high-quality full-profile external thread at the end section of the pipe billet, in particular, at the nipple end of the sub for tubing, the most productive technological method is the stamping method.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

L'invention concerne la fabrication d'articles tubulaires au moyen de procédés de traitement mécanique par pression et plus précisément par la formation d'un filetage externe, notamment sur l'extrémité à mamelon d'un raccord pour tuyaux à pompe et compresseur. L'invention concerne plus particulièrement un procédé de formation d'un filetage externe dans la partie d'extrémité d'un blanc de tuyau par procédé d'estampage. Selon l'invention, on prépare d'abord un blanc de tuyau possédant un diamètre externe de la partie d'extrémité qui est égal au diamètre interne de la matrice de filetage et le diamètre interne déterminé selon une formule, et ladistribution de la partie d'extrémité se fait en un passage par un poinçon conique avec une ceinture de calibration dont le diamètre est égal au diamètre interne de la pièce finale. L'invention permet d'améliorer la fiabilité d'un raccord fileté de tuyau à pompe et compresseur et simplifie la technologie de formation du filetage.
PCT/RU2007/000360 2006-07-12 2007-07-04 Procédé pour former un filetage externe dans la partie d'extrémité d'un blanc tubulaire WO2008008001A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2006124852 2006-07-12
RU2006124852/02A RU2323058C1 (ru) 2006-07-12 2006-07-12 Способ формирования наружной резьбы на концевом участке трубной заготовки

Publications (1)

Publication Number Publication Date
WO2008008001A1 true WO2008008001A1 (fr) 2008-01-17

Family

ID=38923478

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2007/000360 WO2008008001A1 (fr) 2006-07-12 2007-07-04 Procédé pour former un filetage externe dans la partie d'extrémité d'un blanc tubulaire

Country Status (2)

Country Link
RU (1) RU2323058C1 (fr)
WO (1) WO2008008001A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012137089A1 (fr) 2011-04-05 2012-10-11 Pfizer Limited Dérivés de pyrrolo-[2,3-d]pyrimidine en tant qu'inhibiteurs des kinases associées à la tropomyosine
CN103433365A (zh) * 2013-09-01 2013-12-11 贵州航宇科技发展股份有限公司 轴承钢矩形截面环形件热胀形成异形截面环形件的方法
WO2014053968A1 (fr) 2012-10-04 2014-04-10 Pfizer Limited Inhibiteurs de kinase associée à la tropomyosine pyrrolo[3,2-c]pyridine
WO2014053965A1 (fr) 2012-10-04 2014-04-10 Pfizer Limited Inhibiteurs de kinases apparentés à la tropomyosine
WO2014053967A1 (fr) 2012-10-04 2014-04-10 Pfizer Limited Inhibiteurs de kinase associée à la tropomyosine pyrrolo[2,3-d]pyrimidine
WO2015092610A1 (fr) 2013-12-20 2015-06-25 Pfizer Limited Inhibiteurs de kinase apparentés à la n-acylpipéridine éther tropomyosine
WO2015159175A1 (fr) 2014-04-15 2015-10-22 Pfizer Inc. Inhibiteurs de kinases apparentées à la tropomyosine contenant à la fois un 1h-pyrazole et un fragment pyrimidine
WO2015170218A1 (fr) 2014-05-07 2015-11-12 Pfizer Inc. Inhibiteurs de kinases apparentées à la tropomyosine
WO2016009296A1 (fr) 2014-07-16 2016-01-21 Pfizer Inc. Inhibiteurs de kinase liés à la n-acylpipéridine éther tropomyosine
WO2016020784A1 (fr) 2014-08-05 2016-02-11 Pfizer Inc. Inhibiteurs de kinases apparentées à la n-acylpyrrolidine éther tropomyosine
CN105436367A (zh) * 2015-11-30 2016-03-30 吴伟强 一种多功能搓牙机

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103433362B (zh) * 2013-09-01 2015-08-05 贵州航宇科技发展股份有限公司 不锈钢矩形截面环形件热胀形成异形截面环形件的方法
CN103433363B (zh) * 2013-09-01 2015-08-05 贵州航宇科技发展股份有限公司 高温合金矩形截面环形件热胀形成异形截面环形件的方法
CN103433364B (zh) * 2013-09-01 2015-08-05 贵州航宇科技发展股份有限公司 高温合金矩形截面环形件的热胀形成形方法
CN103418674B (zh) * 2013-09-01 2016-03-30 贵州航宇科技发展股份有限公司 钛合金矩形截面环形件热胀形成异形截面环形件的方法
CN103433366B (zh) * 2013-09-01 2015-08-05 贵州航宇科技发展股份有限公司 铝合金矩形截面环形件热胀形成异形截面环形件的方法
RU2644837C2 (ru) * 2015-11-30 2018-02-14 Общество с ограниченной ответственностью "Челябинский трубопрокатный завод-Инжиниринг" Способ получения конической резьбы на трубах методом пластического деформирования

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU109023A1 (ru) * 1957-01-05 1957-11-30 Б.М. Аскинази Способ обработки металла давлением
GB1328483A (en) * 1970-01-22 1973-08-30 Creuzet R A Apparatus and process for shaping tubular metallic components
SU700268A1 (ru) * 1978-02-27 1979-11-30 Ryabtsev Sergej T Способ получени внутренней резьбы на заготовке
SU770628A1 (ru) * 1978-04-20 1980-10-15 Харьковский Филиал Головного Специализированного Производственного Конструкторско-Технологического Бюро По Рациональному Применению Режущего Инструмента Министерства Станкостроительной И Инструментальной Промышленности Ссср Инструмент дл изготовлени резьбы
SU1274832A1 (ru) * 1984-12-24 1986-12-07 Специальное Конструкторское Бюро Часового И Камневого Станкостроения Способ получени внутренней резьбы
RU2259459C2 (ru) * 2000-03-09 2005-08-27 Браш Веллмэн, Инк. Способы формования металлического и фасонного изделий, нарезная распорка для использования при соединении секций бурильной трубы (варианты) и способ ее изготовления

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU109023A1 (ru) * 1957-01-05 1957-11-30 Б.М. Аскинази Способ обработки металла давлением
GB1328483A (en) * 1970-01-22 1973-08-30 Creuzet R A Apparatus and process for shaping tubular metallic components
SU700268A1 (ru) * 1978-02-27 1979-11-30 Ryabtsev Sergej T Способ получени внутренней резьбы на заготовке
SU770628A1 (ru) * 1978-04-20 1980-10-15 Харьковский Филиал Головного Специализированного Производственного Конструкторско-Технологического Бюро По Рациональному Применению Режущего Инструмента Министерства Станкостроительной И Инструментальной Промышленности Ссср Инструмент дл изготовлени резьбы
SU1274832A1 (ru) * 1984-12-24 1986-12-07 Специальное Конструкторское Бюро Часового И Камневого Станкостроения Способ получени внутренней резьбы
RU2259459C2 (ru) * 2000-03-09 2005-08-27 Браш Веллмэн, Инк. Способы формования металлического и фасонного изделий, нарезная распорка для использования при соединении секций бурильной трубы (варианты) и способ ее изготовления

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012137089A1 (fr) 2011-04-05 2012-10-11 Pfizer Limited Dérivés de pyrrolo-[2,3-d]pyrimidine en tant qu'inhibiteurs des kinases associées à la tropomyosine
WO2014053968A1 (fr) 2012-10-04 2014-04-10 Pfizer Limited Inhibiteurs de kinase associée à la tropomyosine pyrrolo[3,2-c]pyridine
WO2014053965A1 (fr) 2012-10-04 2014-04-10 Pfizer Limited Inhibiteurs de kinases apparentés à la tropomyosine
WO2014053967A1 (fr) 2012-10-04 2014-04-10 Pfizer Limited Inhibiteurs de kinase associée à la tropomyosine pyrrolo[2,3-d]pyrimidine
CN103433365A (zh) * 2013-09-01 2013-12-11 贵州航宇科技发展股份有限公司 轴承钢矩形截面环形件热胀形成异形截面环形件的方法
WO2015092610A1 (fr) 2013-12-20 2015-06-25 Pfizer Limited Inhibiteurs de kinase apparentés à la n-acylpipéridine éther tropomyosine
WO2015159175A1 (fr) 2014-04-15 2015-10-22 Pfizer Inc. Inhibiteurs de kinases apparentées à la tropomyosine contenant à la fois un 1h-pyrazole et un fragment pyrimidine
WO2015170218A1 (fr) 2014-05-07 2015-11-12 Pfizer Inc. Inhibiteurs de kinases apparentées à la tropomyosine
WO2016009296A1 (fr) 2014-07-16 2016-01-21 Pfizer Inc. Inhibiteurs de kinase liés à la n-acylpipéridine éther tropomyosine
WO2016020784A1 (fr) 2014-08-05 2016-02-11 Pfizer Inc. Inhibiteurs de kinases apparentées à la n-acylpyrrolidine éther tropomyosine
CN105436367A (zh) * 2015-11-30 2016-03-30 吴伟强 一种多功能搓牙机

Also Published As

Publication number Publication date
RU2323058C1 (ru) 2008-04-27
RU2006124852A (ru) 2008-01-20

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