• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method and apparatus of forming ribbed pipes, after an initial pipe restressing in which bending of the rib of the plane perpendicular to the rolled pipe axis takes place, and straightening of the rib thenafter. Then on duplex metal pipes, the outside pipe is additionally compressed to the core pipe.
    公开号:SU1080734A3
    申请号:SU782568053
    申请日:1978-01-23
    公开日:1984-03-15
    发明作者:Пжыбыла Януш；Гозьдзьэвич Зыгмунт；Ставски Юзэв；Печык Юзэв；Шаль Анджэй；Бодынэк Павэл；Мончыньски Анджэй
    申请人:Заклад Досьвядчальны Пшы Закладах Ужондзэнь Хэмичных Мэтальхэм (Инопредприятие)；
    IPC主号:
    专利说明:

    2, The method of rolling finned tubes according to claim 1, of which is, in order to improve the quality in the manufacture of bimetallic tubes,
    A hollow billet is coaxially injected into the bottom of the finned tube. subsequent fixation of the workpiece and the pipe, and at the same time with the flexible and straightening of the ribs, the ribbed pipe is subjected to additional radial compression until the pipes are completely joined.
    3. A tool for hiding ribbed tubes from a hollow billet containing rolling discs installed coaxially with one another, each of which is installed symmetrically with respect to a plane perpendicular to the axis of the discs, characterized in that, in order to increase the durability of the tubes by reducing internal stresses, it is provided with supporting and regular disks located behind the rolling disks and oppositely directed end surfaces of the regular disks inclined to the axis of the rolling disks with an angle equal to the angle of inclination of the end surface of the latter
    from rolling discs, and the end surfaces of the supporting and correcting discs facing one another are inclined to the axis of the discs, respectively, with angles of 140-170 and 155-170, with the annular surfaces of the supporting and correcting discs located apart from each other at a distance of 2-6 steps rolling discs.
    4. The tool according to claim 3, wherein it is equipped with at least one compression disk located between the supporting and correct disks at a distance of 2-6 steps of the first rolling disk, and the diameter of the pressing disk choose equal 1,001-1,01 diameter of the last rolling disk,
    and the angle of inclination of the end face of the crimping disc facing the supporting disc is equal to .155-170,.
    5. The tool according to paragraph.n. 3 and 4, characterized in that the disks are made with circumferentially rounded transitions from the end surface to the cylindrical one.
    The invention relates to the processing of metals by pressure and can be used to produce mono- and bimetallic cross-finned tubes used as heat exchangers in the power industry. There is a known method of rolling cross-finned tubes from a hollow billet according to which the rib is pre-cut, stretched, and shaped, C13. A known tool for rolling finned tubes from a hollow billet containing rolled discs installed coaxially one to another, each of which is installed symmetrically with respect to a plane perpendicular to the axis of G13 discs. The disadvantage of the tubes obtained using a known method and tool is that. The internal stresses generated in the Formation Process in the outer tube in the fins cause, after the end of the crimping, the effect of tension loss between the pipes, which is necessary to transfer thermal energy towards the fin without noticeable losses. The tools used to form the ribs transfer considerable axial forces during operation. This is especially true of extreme shaping and clamping discs, which are often bent under the action of significant pulsating forces. The need to maintain the required stiffness of the discs and, thus, their thickness determines the size of the minimum rib pitch. The service life of such tools is small, and damage to at least one disk leads to the failure of the entire line of rolling ribs on the pipes. The purpose of the invention is to increase the durability of pipes by reducing internal stresses. To achieve this goal, according to the method of rolling ribbed tubes from a hollow billet, in which the preliminary cutting of the rib, its stretching and shaping are successively performed, the rib is bent from the transverse position after shaping, the deformation force is removed, and then the rib is again applied to the edge. in the direction opposite to the direction of the initial bend, then the rib is right to the transverse position. In addition, in the manufacture of bi. metal pipes into the cavity of the ribbed pipe coaxially inject a hollow billet with a set of fixation of the workpiece and the pipe, and simultaneously with the flexible and straightening of the ribs the ribbed pipe is subjected to additional radial compression until the pipes are completely joined. A tool for rolling re-hollow tubes from a hollow billet containing rolling discs installed coaxially with one another, each of which is installed symmetrically with respect to a plane perpendicular to the axis of the discs, is provided with supporting and regular discs located opposite the rolling discs, while the oppositely directed end surfaces of regular discs discs are inclined to the axis of the rolling discs with an angle equal to the angle of inclination of the end surface of the last of the rolling discs, and the end surfaces of the support and right ceiling elements discs facing one another are formed nak lonnymi respectively to drive axes with angles 140-170 and 155-170 °, wherein the annular surface of the support and drive arranged correctly from one another at a distance of 2-6 steps of rolling disks. In addition, the tool can be equipped with at least one compression disk located between the bearing and correct disks at a distance from the first one, equal to 2-6 steps of the rolling disks, with the diameter of the diammeter disk being equal to 1.001 -1.01 of the diameter of the last rolling disk , and the angle of inclination of the end face of the compression disk facing the supporting disc is 155-170. In addition, all discs are made with transitions twisted along an arc of a circle from the end surface to the cylindrical one. FIG. Figure 1 shows a tool for rolling monometallic Tpy6J in FIG. 2 - the same for rolling bimetallic tubes. The tool consists of a threaded section 1 with symmetrical discs, a pre-stretching rib 2 and a forming rib 3, and also from rolling sections with asymmetrical discs (rolling) two-sided bending of the ribs.4 consisting of a supporting disc 5, two crimping discs 6 and a correct disk 7. The supporting disk 5 transfers onto the tool shaft;. Most of the axial forces arising during the formation of the rib. Its massive structure, which flows out of a profile consisting of a rib surface and a cone with a corner angle of 140-170, allows great forces to be transferred and thereby directly affects the amount possible to form the height of the rib. The tapered side of the support disc 5 bends the edge from its normal position. This rib then enters the crimping discs 6, each of which bends the rib with respect to the plane perpendicular to the axis of rolling, simultaneously pressing the finned tube to the inner tube. Between the main disk 5 and the first crimp disk 6 left three steps without rolling disks. In the period, which corresponds to the movement of the pipe in three steps, the pipes begin to relax beforehand, due to which they get the best tension of the pipes during crimping. In the process of bending the rib, the internal stresses present in the rib are eliminated. Pipes have been obtained that are characterized by a high stability of the size and do not crack during temperature changes during operation.
    权利要求:
    Claims (5)
    [1]
    METHOD FOR ROLLING FINISHED PIPES AND A TOOL FOR ITS IMPLEMENTATION. 1. A method of rolling ribbed pipes from a hollow billet, in which the rib is preliminarily cut in series, stretched and shaped, with the fact that, in order to increase the pipe durability by reducing the internal stresses, after shaping, the rib is bent away from the transverse position, the deformation force is removed, and then the deformation force is applied to the rib, the rib is bent to the side opposite to the direction of the initial bend, after which the rib is adjusted to the transverse position.
    • 5 8
    Y 1 , / 1 • 0Ж / 4 х t080734
    [2]
    2. The method of rolling ribbed tubes in π. 1, characterized in that, in order to improve quality in the manufacture of bimetallic pipes, a hollow billet is coaxially inserted into the cavity of the ribbed pipe with subsequent fixation of the billet and pipe, and simultaneously with the flexible and straightening of the ribs, the ribbed pipe is subjected to additional radial compression until the pipes are completely joined.
    [3]
    3. A tool for rolling ribbed pipes from a hollow billet, comprising rolling disks installed coaxially with one another, each of which is mounted symmetrically with respect to a plane perpendicular to the axis of the disks, characterized in that, in order to increase the durability of the pipes by reducing internal + internal stresses, it is equipped with supporting and regular disks located behind the rolling disks, while the oppositely directed end surfaces of the regular disks are made inclined to the axis of the rolling disks with an angle equal to at tilt end surface of the last rolling disc, and the end surfaces of the support and proper discs facing one another, are inclined to the disc axis, respectively with the angles ** 140-170 and 155-170, wherein the annular surface of the support and proper disc arranged one from another at a distance of 2-6 steps of the rolling discs.
    [4]
    4. The tool according to claim 3, comprising the fact that it is equipped with at least one crimping disk located between the support and the right disks at a distance from the first one, equal to 2-6 steps of the rolling disks, the diameter of the crimping disk being selected equal to 1.001-1.01 of the diameter of the last rolling disk, and the angle of inclination of the end face of the crimping disk facing the support disk is 155-170 °.
    [5]
    5. The tool according to p. 3 and 4, characterized in that the disks are made with transitions rounded from the end surface to the cylindrical one rounded along a circumference.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1080734A3|1984-03-15|Method and tool for rolling finned tubes
    US5142895A|1992-09-01|Method for bending tubes
    US4168618A|1979-09-25|Y and T-finned tubes and methods and apparatus for their making
    CA2150588C|2006-12-19|Multiple finned tube and a method for its manufacture
    US4459917A|1984-07-17|Method and apparatus for producing even tube extensions in a partially assembled heat exchanger
    US6594896B2|2003-07-22|Method for making corrugated fins
    US3600922A|1971-08-24|Manufacture of integrally finned tubing
    JP5794901B2|2015-10-14|Manufacturing method and manufacturing apparatus of internally spiral grooved tube
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    GB2183519A|1987-06-10|Method of and apparatus for producing helically finned tubes
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    SU1268094A3|1986-10-30|Method for manufacturing ribbed pipes from bimetallic round billets and set of tools for manufacturing ribbed pipes
    JPH06312361A|1994-11-08|Outside face grinding method for metallic tube and shape correcting device
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    JP3908974B2|2007-04-25|Internal grooved tube and manufacturing method thereof
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    SU923661A1|1982-04-30|Method of producing ribbed tubes
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    SU1142204A1|1985-02-28|Arrangement for thickening pipe ends
    KR940008540B1|1994-09-24|Making method of fin tube
    SU1386328A1|1988-04-07|Arrangement for external finning of tubes
    JP2773872B2|1998-07-09|Heat transfer tube for boiling and condensation
    JP2820524B2|1998-11-05|Bending roll
    同族专利:
    公开号 | 公开日
    DE2803365C3|1981-12-24|
    HU176733B|1981-04-28|
    CS203004B2|1981-02-27|
    DE2803365B2|1981-04-16|
    IT7867147D0|1978-01-25|
    DD134061A5|1979-02-07|
    PL113419B1|1980-12-31|
    RO78178A|1982-02-01|
    JPS561972B2|1981-01-17|
    CA1094787A|1981-02-03|
    PL195619A1|1978-08-14|
    SE7800918L|1978-07-27|
    NL7800970A|1978-07-28|
    FR2378584B1|1980-08-22|
    US4153982A|1979-05-15|
    DE2803365A1|1978-07-27|
    JPS5393168A|1978-08-15|
    GB1596865A|1981-09-03|
    FR2378584A1|1978-08-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2586653A|1951-06-22|1952-02-19|Calumet And Hecla Cons Copper|Method of producing heat exchange elements|
    US2680975A|1953-02-24|1954-06-15|Hudson Engineering Corp|Fin forming machine|
    GB897635A|1960-01-30|1962-05-30|Howell & Company Ltd|Manufacture of composite metal tubes|
    US3683656A|1970-03-25|1972-08-15|Carl M Lewis|Heat exchanger apparatus and method of making the same|
    DE2202435A1|1972-01-19|1973-08-02|Microdot Inc|METHOD FOR MANUFACTURING THREADED BODIES|
    US4059147A|1972-07-14|1977-11-22|Universal Oil Products Company|Integral finned tube for submerged boiling applications having special O.D. and/or I.D. enhancement|US4348794A|1978-05-05|1982-09-14|International Telephone And Telegraph Corporation|Double-walled finned heat transfer tube|
    DE3049754C2|1979-07-31|1990-06-28|Dnepropetrovskij Gornyj Institut Imeni Artema, Dnepropetrovsk, Su|
    US4403385A|1980-10-24|1983-09-13|Amtrol Inc.|Process of preparing a double wall heat exchanger|
    JPS57145070U|1981-03-06|1982-09-11|
    PL139849B1|1983-03-31|1987-02-28|Zaklady Urzadzen Chem|Method of rolling of transversally finned pipes and set of tools therefor|
    US4546819A|1984-02-10|1985-10-15|Amtrol Inc.|Double wall heat exchanger|
    US4612790A|1984-06-19|1986-09-23|Zaklady Urzadzen Chemicznych Metalchem|Method of drawing ribs on tubes|
    US4612791A|1984-06-19|1986-09-23|Zaklady Urzadzen Chemicznych Metalchem|Method and apparatus for rolling transversely ribbed bimetallic pipes|
    US4901553A|1987-06-03|1990-02-20|Sumitomo Metal Industries, Ltd.|Method of manufacturing a finned tube|
    EP0431161A4|1989-03-13|1991-09-25|Belorussky Politekhnichesky Institut|Machine tool for cutting out transverse ribs on a rectangular cross-section element for heat exchanger|
    JP6400418B2|2014-10-01|2018-10-03|アロン化成株式会社|Manufacturing method of ribbed bent pipe and heat treatment jig used therefor|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    PL1977195619A|PL113419B1|1977-01-26|1977-01-26|Method of rolling transversely finned pipes and workingtool therefor|
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