• 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:
    1. METHOD PIPE FLEXIBLE METHOD including local heating of the pipe with an annular heater, mainly induction, moving the heated zone along the pipe with simultaneous application of a bending moment and cooling near the bend, while at the beginning of the bending W 5 d / bending radius varies from radius equal to or more than three pipe diameters to the required, taking into account the spring, and at the end from the required to three or more pipe diameters, and the relative speed of movement of the heated zone is changed according to the program, differing in Then, in order to improve the quality of the bent pipes, during the local heating and displacement of the heated zone, the temperature of the heated zone is kept constant by maintaining a constant ratio of the effective thermal power of the heater and the relative velocity of the heated O) zone, adjusting said power according to the program, and interval of bending angle, in which the bending radius at the beginning and end of bending is changed, choose less than 8 Hz 9 9 9
    公开号:SU1175353A3
    申请号:SU802981970
    申请日:1980-09-19
    公开日:1985-08-23
    发明作者:Каванами Сунпеи；Ватанабе Ясуо；Ханио Сусуму
    申请人:Дай-Ити Хай Фриквенси Компани,Лимитед (Фирма)；
    IPC主号:
    专利说明:

    2. A method according to claim 1, characterized in that the effective thermal power of the heater and the relative stirring rate of the heating zone are kept constant.
    The invention relates to the processing of metals by pressure, in particular to the technology of pipe bending.
    The aim of the invention is to improve the quality of products by providing a smooth change in wall thickness.
    FIG. Figure 1 shows schematically an apparatus for carrying out the proposed method; in fig. 2, the radius change curve is flexible during deformation (option 1) in FIG. 3 — curves of variation of the speeds of movement of the heater and the pipe; in fig. 4 shows a mechanism for creating a constant heating rate; FIG. 5, the radius change curve is flexible in the course of deformation (option II).
    The method is carried out as follows.
    The pipe 1 is inserted into the annular heater 2, for example, induction and into the clamp of the bending lever 3, passing it between the guide rollers 4 and 5, while the heater is placed in the center of the deformation zone, displaced relative to the vertical plane passing through the center of the rotation of the lever 3.
    By turning the grid 3, the tube 1 is moved with the speed W to the right and bending it, the heater 2 is moved with the speed h to the left, while during the whole process of the boom, including the initial and final stages (O - Q 8), constant temperature of the heated zone by keeping the ratio of the effective thermal power of the heater and the relative velocity of the heated zone VW + h constant by adjusting them according to the program
    The most expedient is to maintain the power of the heater constant, but it is possible to keep the process flexible even at variable power if the power reserve of the heater is sufficient; big.
    In the first case, the change in scopes and effective power is carried out as follows.
    R For pipes with a ratio of 1.5
    (Rg is the required bending radius, D is the diameter of the pipe at the beginning of bending) the heater speed h W varies up to 0 in the angle range 8 b o while W const, the total (relative) speed h + WV decreases from 2W to W, and the curvature radius from R 3D to. RP 1,5D.
    At the end of the bend, the heating rate: h changes in reverse order: the speed V increases from W to 2W.
    The effective power of the heater varies accordingly, which is achieved by adjusting the feedback program.
    In the second case, both the speeds h and W are varied according to a given program at V const, and also when the radius changes, they are flexible according to a given program.
    ; If it is assumed that the radius is flexible from |; varies at the initial and final stages are flexible in hyperbola, then the speeds at the initial stage of bending should change according to the law
    H
    h v
    9 + where (f is the current bending angle,
    a (the largest ra 1 RO
    3
    radius at the beginning of bending, equal to 31, RO 1.50) - the effective length is gi. side lever.
    In order to maintain the relative velocity V constant, a mechanism can be applied (Fig. 4) containing an end clamp 6 mounted in the guides 7 and connected via a bracket 8 to a driving screw 9 fixed on the heater 2 and driven from the engine The number of revolutions (not shown) through the gearbox 10 and the nut 11 (heater 2 is shown in the position corresponding to the end of the bending).
    The relative speed V is kept constant while the rotational speed of the nut 11 is kept constant, and the value of speed V is chosen equal to the normal bending speed. To control the flexible at its beginning, the velocity W of the pipe 1 is slowly changed from a small value (usually equal to V / 2) to a larger value
    534
    (equal to V). First, when W is less than V, the heater moves to the left, and when W becomes equal to V, the heater stops relative to point O, after which the bending takes place with a constant radius RQ for a certain time, and at the end of the bend the speed W becomes less than V
    until it takes the value of the lowest speed equal to the initial speed (usually V / 2), and thereafter the bend ends.
    The method can be improved if, as an R f (op) curve, we take the S curve (Fig. 5), which differs from the hyperbola (curve O) by a steeper change in the initial stage of bending and more gentle
    in the ultimate. Such an improved curve is more naturally combined with a constant radius curve and is facilitated by a flexible one with a small relative radius.
    Figg
    5 7 6 Fyg-C
    权利要求:
    Claims (2)
    [1]
    1. METHOD OF FLEXIBLE METAL PIPES, including local heating of the pipe with a ring heater, mainly induction, moving the heated zone along the pipe with simultaneous application of bending moment and cooling near the place of bending, while at the beginning of bending the bending radius is changed from a radius equal to or greater than three pipe diameters to the required, taking into account springing, and at the end - from the required to three or more pipe diameters, and the relative speed of the heated zone is changed according to the program, characterized in that, "with the aim of improving the quality of bent pipes, during local heating and moving the heated zone, the temperature of the heated zone is maintained constant by keeping the ratio of the effective thermal power of the heater and the relative speed of movement of the heated zone constant, adjusting the mentioned power according to the program, and the interval of the bending angle, in which the bending radius is changed in beginning and end of bending, choose less than 8 °.
    FIG. 1
    [2]
    2. The method according to π. 1, characterized in that the effective thermal power of the heater and the relative mixing rate of the heating zone are kept constant.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1175353A3|1985-08-23|Method of bending metal pipes
    US2812794A|1957-11-12|Method and machine for manufacturing helical fin structures
    US4766751A|1988-08-30|Apparatus for continuously producing tube having helical grooves in its inner surface
    EP0790870A1|1997-08-27|Flattening group in levelling machines kept under tension, for metal bands, with operative rollers of increasing diameter
    US3195338A|1965-07-20|Device for the continuous winding of wire
    US3951322A|1976-04-20|Method and apparatus for the treatment of flexible material
    GB1225420A|1971-03-17|
    FR2397467A1|1979-02-09|PROCESS FOR OBTAINING THICK PURE ALUMINUM COATINGS ON LOW DIAMETER TUBES
    US3186820A|1965-06-01|Glass spiral winding machine
    JPH07178448A|1995-07-18|Device for manufacture of brazed multilayer metal pipe
    US2523015A|1950-09-19|Glass tube bending method and apparatus
    FR2633849A1|1990-01-12|PROCESS AND DEVICE FOR THE MANUFACTURE OF TUBES ACCORDING TO THE ROLLING PROCESS WITH NO COLD PILGRIMS
    US2310091A|1943-02-02|Machine for and method of bending tubing
    US2901930A|1959-09-01|Tube bending machines
    US4430875A|1984-02-14|Rolling mill for the stretch-reducing of tubes
    KR830008749A|1983-12-14|Small array type control method of device for winding heat exchanger and device
    US1118579A|1914-11-24|Apparatus for drawing glass.
    US2843878A|1958-07-22|Apparatus for manufacturing helical wire
    US4606209A|1986-08-19|Disc roller mechanism for forming helical shapes
    US3920435A|1975-11-18|Glass tube bending apparatus
    KR910001543B1|1991-03-15|Apparatus for looping belt-like materials
    SU747090A1|1983-07-15|Apparatus for making glass capillary columns
    SU766700A1|1980-09-30|Automatic winding controller
    JPS5874215A|1983-05-04|Bending device
    HU185135B|1984-12-28|Mill train for drawing tubes
    同族专利:
    公开号 | 公开日
    JPS6218245B2|1987-04-22|
    EP0117317A1|1984-09-05|
    EP0025929A1|1981-04-01|
    US4412442A|1983-11-01|
    DE3068039D1|1984-07-05|
    EP0117317B1|1988-08-17|
    EP0025929B1|1984-05-30|
    JPS5645220A|1981-04-24|
    引用文献:
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    SE381583B|1970-03-12|1975-12-15|Cojafex|DEVICE FOR BOOKING OF ELONG EXPENSES|
    JPS517472B2|1972-07-03|1976-03-08|
    JPS517472A|1974-07-08|1976-01-21|Hitachi Ltd|
    US4056960A|1974-07-23|1977-11-08|Shunpei Kawanami|Means and method for bending elongated materials incorporating two arms|
    US4062216A|1974-07-23|1977-12-13|Daiichi Koshuha Kogyo Kabushiki Kaisha|Metal bending methods and apparatus|
    US3958438A|1974-10-04|1976-05-25|Boris Stepanovich Somov|Apparatus for bending pipes with heating of the bending zone|
    DE2447657C3|1974-10-05|1979-02-01|Uralskij Zavod Tjaschelogo Maschinostroenija Imeni Sergo Ordschonikidze, Swer-Dlowsk |Device for bending pipes|
    JPS5938048B2|1975-09-18|1984-09-13|Daiichi Koshuha Kogyo Kk|
    SU580030A2|1975-10-08|1977-11-15|Уральский Дважды Ордена Ленина, Ордена Октябрьской Революции, Ордена Красного Знамени, Ордена Отечественной Войны 1-Й Степени, Ордена Трудового Красного Знамени И Ордена "Красное Знамя Труда" Завод Тяжелого Машиностроения Им.Серго Орджоникидзе|Drive of tube-bending machine|
    DE2546695C3|1975-10-17|1987-04-16|Daiichi Koshuha Kogyo K.K., Tokio/Tokyo, Jp|
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    NL7806051A|1977-06-22|1978-12-28|Daiichi Koshuha Kogyo Kk|METHOD AND DEVICE FOR BENDING LONG PIECES OF METAL.|JPS6044054B2|1982-09-03|1985-10-01|Daiichi Koshuha Kogyo Kk|
    JPH0122046B2|1982-10-21|1989-04-25|Hitachi Ltd|
    JPH0367450B2|1986-04-28|1991-10-23|Hitachi Ltd|
    JPH01205825A|1988-02-12|1989-08-18|Dai Ichi High Frequency Co Ltd|Bending method for thin metallic bar such as u-shape steel|
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    CN104690117B|2015-03-27|2017-03-01|华电重工股份有限公司|The especially big radius elbow of large diameter thick wall steel pipe and its forming method|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP54120833A|JPS6218245B2|1979-09-21|1979-09-21|
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