• 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:
    The invention relates to laser processing and may find application in processing inside pipes in hard-to-reach places. The purpose of the invention is to protect photodetectors from exposure to radiation from a technological laser and to simplify the operation of combining the output optical axis of the mirror transmitter and the axis of the receiver. The laser processing method inside the tubes and the device for its implementation are designed, for example, to allow for infrared infrared radiation welding using a welding head installed in the heat exchange tube inside the water jacket of the steam generator of the nuclear power plant. The powerful laser beam is transferred to the axis of the pipe being processed due to two controlled automatic optical deflection devices with rotation and displacement drives, namely, a transmitter mounted near the access hole to the water jacket, and a receiver mounted on the moving part of the optical transport system and centered with the axis of the processed pipe. A powerful beam of radiation is coaxially captured by a visible beam of radiation, which, using reverse retroreflectors and an autocollimation ring mirror mounted on the receiver, and photodetectors installed in front of the transmitter, allows the optical link between the transmitter and the receiver to be established and maintained. 2 sec. the item of f-ly, 4 ill.
    公开号:SU1713425A3
    申请号:SU894613625
    申请日:1989-02-27
    公开日:1992-02-15
    发明作者:Гаффард Жан-Поль；Равеле Робер；Шабассье Женевьев；Гриффатон Жак
    申请人:Фраматом (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a method for laser processing, namely, welding inside pipes in hard-to-reach places of a nuclear power plant and device for its implementation.
    The aim of the invention is to protect the photodetectors of the photosensitive measuring body from the effects of invisible radiation from the technological laser and to simplify the operation of combining the output optical axis of the mirror transmitter on the fixed part of the system
    transportation with the input optical axis of the mirror receiver on the moving part of the transportation system.
    FIG. Figure 1 shows an invisible radiation process laser, a source of visible radiation and a system for combining the optical axes of the invisible and visible beams. The radiation of a technological laser and a source of visible radiation. In FIG. 2 a processing head with a focusing system, an optical radiation transport system consisting of fixed and movable parts with optical axis alignment bodies made in the form of a mirror transmitter and a mirror receiver, installed respectively at the output and inlet of these parts, a measuring organ and an analysis and control organ FIG. 3 shows the structure of the mirror receiver or mirror transmitter nodes; in fig. 4 - return mirror body mounted in front of the receiver on the moving part of the transportation system.
    The device contains a powerful laser with carbon dioxide 1, a source of visible radiation 2, an optical network for combining the optical axes of the laser beams 1 and the source 2, consisting of a telescopic optical system 3, a circular transparent divider 4 and installed at an angle of 45 ° to the main optical axis 5 of the laser 1 of the annular rotary mirror 6 so that its center lies on the axis 5 (see Fig. 1). Mirror 6 is installed with the possibility of fine mechanical adjustment of its relative to the main optical axes 5 and 7 of the laser 1 and the source 2.
    The device also contains an optical transport system consisting of fixed and movable parts 8 and 9 (see hg. 2). At the output of the fixed part 8, the mirror transmitter 11 with rotational actuators 12 is optically rotated around the optical axis 5 and around axis 10, perpendicular to axis 5, optically coupled to laser 1 and source 2 (see Fig. 3). At the entrance of the movable part 9 of the transportation system, the mirror receiver 15 with the movement mechanism 16 is installed with the possibility of rotation around its input axis 13 and axis 14, perpendicular to the axis 13. At the output of the stationary part 8 of the transportation system, a photosensitive measuring unit 17 is optically coupled to the transportation system by means of a translucent ring reflector 18 installed at an angle of 45 ° to the optical axis 5. A mirror element 20 with an annular mirror 20 is mounted coaxially with its input axis 19 at an angle of 45 ° to the optical axis 5 The base 21 and uniformly mounted on it at the periphery of at least three retroreflectors 22, and between them in the ring base 21 on the periphery ring-shaped grooves (see Fig. 4). The reflecting faces of retroreflectors 22 are made with right angles at the apex, and the reflecting surfaces are facing the transmitter 11. At the output of the movable part 9 of the transportation system coaxially with its axis 13, an annular mirror element 23 is installed with a reflecting surface facing the transmitter 11, the processing head 24 with a focusing a system 25 mounted at an angle of 45 ° to its optical axis 26 by a swiveling mirror 27. Measuring body 17 consists of a focusing lens 28, a beam splitter 29 and photodetectors 30 and 31. The device also contains an analysis and control unit consisting of a computing device 32 and a video control unit 33, the computing device 32 being electrically connected to the photodetectors, and 30 and 31, the transmitter 12 rotating the transmitter 11 and the receiver moving mechanism 16 15. The transmitter 11 consists of angle 45 ° to the axis 5 and 10 rotatably around these axes of the swivel mirrors 34 and 35. Receiver 15 consists of rotary mirrors 36 and 37 installed at an angle of 45 ° to the axes 13 and 14. The photodetectors 30 and. 31 are made in the form of analyzers of the position of the radiation beam in two coordinates located in the plane of the photodetectors 30 and 31. The fixed part 8 of the transport system passes through the water jacket 38. the reactor, in which the moving part 9 and the processing head 24 are installed, are interconnected tooling 39, which combines their optical axes 13 and 26.
    The device works as follows
    With the help of an optical system for combining the optical axes of the radiation beams of the laser 1 and the source of visible radiation 2, the radiation of the source 2 is expanded by a telescopic system. 3 to a size larger than the beam diameter of the invisible radiation of the laser 1, the annular beam is cut out by a divider 4 and sent with a mirror 6 coaxially to the main optical axis 5 of the laser 1 to the fixed part 8 of the radiation transporting system through which the oyo hits the speculars / transmitter 11. Transmitter 11c by means of the actuator 12, the rotation is rotated so as to direct the annular beam of visible radiation to the input of the mirror receiver 15, which in turn is displaced by the movement mechanism 16 depending on the light signal returned to atnom direction mirror elements 20 and 23 to transmitter 11 and via rotary mirror 18 on the measuring element 17. The photodetectors 30 and 31 of the measuring body and the video control unit 33 transmit information about the spatial position of the mobile portion 9 of the transport system
    radiation and processing head 24 in. the computing device 32. The processing head 24 is coaxially installed in the pipe 40 being processed using control signals from the computer 32. The welded annular joint is combined with the outlet 41 in the head 24. Then the laser radiation 1 is fed through the transport system to the processed head 24, focused by the system 25 and the turning mirror 27 are guided through the opening 41 to the weld joint of the pipe 40 and perform laser welding.
    The method of laser treatment inside tubes in hard-to-reach places of a nuclear power plant consists in moving the machining head 24 to a predetermined position by centering the head 24 relative to the axis 26 of the pipe 40 being processed, inserting the head into the machined pipe 40 before aligning the outlet opening 41 of the head 24 with the welded annular joint the axis 19 of the entrance of the movable part 9 of the radiation transporting system with the optical axis 42 of the output of its fixed part 8 by means of a directional coaxial with the optical axis 5 not idimogo annular radiation beam 43 .vidimogo radiation. Here, a portion of the visible radiation is reflected by the return mirror elements 20 mounted on the periphery around the trajectory of the invisible radiation beam to the measuring element 17 and at least three visible radiation beams are detected by the photo detector 30 characterizing the deviation of the optical axis of the visible radiation beam 44 from the output optical axis 42 of the transmitter 11. Another part of the visible radiation passing through the annular grooves in the base 21 of the mirror element 20 and reflected from the mirrors 36 and 37 by means of a return an annular mirror 23 mounted coaxially along the periphery around the path of the beam of invisible radiation is reflected onto the measuring body 17 and recorded by a photo detector 31 characterizing the deviation of the output optical axis 42 of the transmitter 11 from the input optical axis 5 of the receiver 15. Moreover, the electrical signals of the photodetectors OZ and 31 are converted into control signals rotation actuators 12 and movement of the transmitter 11 and receiver 1B by the mechanism 16 for combining, respectively, their output and input optical axes 42 and 19. Installing return grains The core elements 20 and 23 and the measuring body at the periphery around the trajectory of the invisible radiation beam, as well as the use of the annular visible beam 43, protect the photodetectors 30 and 31 of the measuring body 17 from the effects of the invisible radiation of the laser 1, and also simplify the combining operation of the output optical axis 42 mirror transmitter 11 on the fixed part 8 of the transport system with the input optical axis 19 of the mirror receiver 15 on the movable part 9 of the transport system.
    By the proposed method, the direction of the beams of visible radiation of the source 2 entering the transmitter 11 (i.e.,
    5, the direction of the axis of the laser 1, according to which the transmitter 11 is adjusted during installation of the system, as well as the direction of the beams coming out of the receiver 15), the direction of the axis of the treated pipe 40,
    0 wherein the receiver 15 is guided relative to this pipe by the movable part 9 of the transport system rigidly connected with this receiver 15, and the movable part 9 is supported on the tubular plate rigidly connected to the pipe 40. The control of the angular deviations of the transmitter 11 and the receiver 15 allows It therefore does not direct the output beams from transmitter 11 to receiver 15, providing optical
    0 connection between transmitter 11 and receiver 15.
    权利要求:
    Claims (2)
    [1]
    Claims 1. Method of laser treatment inside pipes mainly in hard-to-reach
    5 locations of a nuclear power plant, consisting in centering the processing focusing head relative to the axis of the pipe being processed, inserting the head into the pipe being processed before aligning it with
    0 welded annular joint of the head outlet orifice, combining the optical axis of the entrance of the moving part of the radiation transporting system with the optical axis of the exit of its fixed part with
    5 is directed coaxially with the optical axis of the invisible radiation of the beam of visible radiation, while a part of the visible radiation is reflected by means of returning mirror elements to the measuring element with
    0 by the photodetector of the deflection of the optical axis of the beam from the output optical axis of the transmitter, and another part of the visible radiation is converted using a measuring unit on another photodetector of the deflection of the output optical axis of the transmitter from the input optical axis of the receiver; combining, respectively, their output and input optical axes, then serves the invisible radiation of the technological laser to focus laser processing system, characterized in that, in order to protect photodetectors from the effects of radiation from a technological laser and to simplify the operation of combining the output optical axis of the transmitter with the input optical axis of the receiver by eliminating retraction of returnable mirror elements and the measuring body in the process of combining optical axes, the visible beam of radiation is served as an annular beam, the returnable mirror elements and the measuring element are mounted on the periphery Series around the trajectory of the beam of invisible radiation.
    [2]
    2. An apparatus for laser processing inside tubes, mainly in hard-to-reach places of a nuclear power plant, comprising an invisible radiation technological laser, a source of visible radiation, a system for combining the optical axes of a laser radiation beam and a source of visible radiation, a processing head with a focusing system, an optical radiation transporting system a fixed part and a moving part with a moving mechanism; at the exit of the fixed part it is mounted to rotate around The output optical axis and optical mirror connected to the laser and the source of visible radiation around the axis perpendicular to it, with a rotational drive transmitter, at the input of the moving part of the radiation transporting system are installed with the possibility of rotation around its input axis and around the axis perpendicular to it the rotational receiver with rotational drives optically coupled to the focusing system, recurring mirror bodies, a photosensitive measuring unit with photodetectors and a beam splitter, an analysis and control unit, output radiation movable part transportation system installed tsentriruyuscha its output shaft casing, and inputs the control organ analysis
    electrically connected to the photodetector outputs, and its outputs to the rotational drives of the mirror transmitter and the mirror receiver and the moving mechanism of the moving part of the radiation transporting system; in addition, the photodetectors are made in the form of analyzers of the position of the radiation beam in two coordinates in the plane of the photodetectors,
    In order to protect photodetectors from the effects of radiation from a technological laser and to simplify the operation of combining the output optical axis of the mirror transmitter with the input optical axis of the mirror receiver, the device is equipped with an annular mirror divider installed coaxially and at an angle to the output optical axis of the fixed part of the transport system
    radiation and optically connected with the measuring body, the measuring body is installed at the exit of the fixed part of the radiation transporting system, the return mirror bodies are made in
    a mirror element with a ring base and uniformly mounted on it at the periphery of at least three retroreflectors, and between
    they are in the annular base around the periphery ring-shaped grooves, and an annular mirror element installed at the exit of the movable part of the radiation transporting system perpendicular to its
    the output optical axis so that its mirror surface faces the mirror receiver, the reflecting faces of each retroreflector are made with right angles at the apex, the system of combining the optical axes of the laser radiation beams and the source of visible radiation is made in the form of a telescopic system, an optical splitter and a turning mirror with a central hole installed coaxially and at an angle to the output optical axis of the fixed part of the radiation transportation system; moreover, the photodetectors are made in the form beam image analyzers by its cross section.
    1
    Dzig.Z
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    同族专利:
    公开号 | 公开日
    EP0331962A1|1989-09-13|
    FR2627874B1|1995-06-16|
    CA1316990C|1993-04-27|
    US5085509A|1992-02-04|
    CN1035567A|1989-09-13|
    ZA891536B|1989-11-29|
    KR890013493A|1989-09-23|
    DK91489A|1989-08-30|
    DK91489D0|1989-02-27|
    JPH01258888A|1989-10-16|
    FR2627874A1|1989-09-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3844660A|1972-11-16|1974-10-29|Zygo Corp|Method and apparatus for aligning an interferometer mirror|
    US3892488A|1974-02-22|1975-07-01|Us Air Force|Laser site marking system|
    JPS57137092A|1981-02-16|1982-08-24|Olympus Optical Co Ltd|Visible guide beam projector for invisible laser device|
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    FR2541468B1|1983-02-17|1986-07-11|Commissariat Energie Atomique|DEVICE FOR ALIGNING A LASER BEAM THROUGH OPTICAL SIGHTING MEANS, METHOD FOR LOCATING THE LASER BEAM EMISSION AXIS AND METHOD FOR IMPLEMENTING THE DEVICE, FOR CONTROLLING ALIGNMENT|
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    DE3406676A1|1984-02-24|1985-09-05|Fa. Carl Zeiss, 7920 Heidenheim|DEVICE FOR CORRECTING THE POSITION OF A LASER BEAM GUIDED BY A JOINT OPTICS|
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    US4772122A|1986-08-18|1988-09-20|Westinghouse Electric Corp.|Alignment technique for laser beam optics|JP2559285B2|1990-03-29|1996-12-04|株式会社イセキ開発工機|Shield type tunnel excavator|
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    US5386221A|1992-11-02|1995-01-31|Etec Systems, Inc.|Laser pattern generation apparatus|
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    JP3560135B2|1999-03-23|2004-09-02|日産自動車株式会社|Quality monitoring method for YAG laser welds|
    US7279721B2|2005-04-13|2007-10-09|Applied Materials, Inc.|Dual wavelength thermal flux laser anneal|
    AT418143T|2005-04-19|2009-01-15|Koninkl Philips Electronics Nv|DEVICE FOR RADIATION CONTROL ON A LAYER, DEVICE COMPRISING SUCH A DEVICE AND METHOD USING SUCH A DEVICE|
    CN107429994A|2015-03-27|2017-12-01|奥林巴斯株式会社|Measure head and the eccentric measure device for possessing the measure head|
    DE102015016274A1|2015-12-16|2017-06-22|Mbda Deutschland Gmbh|Optical system|
    DE102016222186B3|2016-11-11|2018-04-12|Trumpf Laser- Und Systemtechnik Gmbh|Method for calibrating two scanner devices each for positioning a laser beam in an operating field and processing machine for producing three-dimensional components by irradiation of powder layers|
    DE102016222187A1|2016-11-11|2018-05-17|Trumpf Laser- Und Systemtechnik Gmbh|Method for determining a beam profile of a laser beam and processing machine|
    DE102018205403A1|2018-04-11|2019-10-17|Trumpf Laser- Und Systemtechnik Gmbh|Method for calibrating a processing machine and processing machine|
    US10989528B2|2019-08-27|2021-04-27|Raytheon Company|High speed beam component-resolved profile and position sensitive detector|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8802473A|FR2627874B1|1988-02-29|1988-02-29|POWER BEAM ALIGNMENT SYSTEM|
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