• 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:
    For welding a longitudinal seam of cladding tubes of cables, wherein the cladding tubes consist of a metal strip bent into a tube (5), a device (1) is provided which has two welding devices (2, 3) each with two welding heads (10, 11) , The welding guns of the welding heads (10, 11) are detected by means of optical devices (15), which are formed in the manner of a Seheimpflug camera and which detect the position of the joint (joint) between the longitudinal edges of the tube (5) bent metal strip, The joint tracked while the longitudinal seam is welded. Another laser device 20 detects the vertical position of the tube (5), so that the welding heads (10, 11) each held at the correct distance from the tube (5) and can be tracked accordingly. By using two welding devices (2, 3) it is possible to use the other welding device (3 or 2) for maintenance work or replacement of the welding electrodes of the welding heads (10, 11) of one welding device (2 or 3), so that a continuous Working is possible.
    公开号:AT515464A1
    申请号:T173/2014
    申请日:2014-03-11
    公开日:2015-09-15
    发明作者:Werner Dipl Ing Hörschläger；Markus Pieber；Karl Schlacher
    申请人:Rosendahl Nextrom Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a method having the features of the introductory part of claim 1.
    The invention further relates to a device with which the method according to the invention can be carried out.
    Welding of the joint at the joints between the longitudinal edges of tube-bent strips of metal to longitudinal seams, in which the adjacent longitudinal edges of the tube-bent strip of metal with each other by welding to form a weld (longitudinal seam) are joined together, is per se known.
    For example, sheaths of cables made of strips bent into a tube of metal are closed to form a longitudinal seam.
    A problem in the known methods and devices of the type mentioned is that it is essential for the successful execution of the welding process that the position of the joint at the junction between the adjacent longitudinal edges of the tube bent strip of metal, so the body, at which the longitudinal seam is to be formed, must be recorded continuously.
    This does not always succeed with the known devices, resulting in faulty or non-permanent longitudinal seams.
    The invention has for its object to provide a method and an apparatus of the aforementioned types available with which longitudinal seams can be easily prepared.
    This object is achieved according to the invention with a method having the features of claim 1.
    As far as the device according to the invention is concerned, the object underlying the invention is achieved with a device having the features of independent, directed to the device claim.
    Preferred and advantageous embodiments of the invention are the subject of the dependent claims.
    In the method according to the invention, since the position of the joint (ie the area in which the longitudinal edges of the metal strip bent to the tube adjoin one another) is continuously detected, the at least one electrode used to weld the longitudinal seam can be continuously tracked and produce a reliable and error-free longitudinal seam.
    In the context of the invention it is preferred that the position of the joint is detected by means of an optical device, for example with the aid of a camera. In the context of the invention, a Scheimpflug camera is preferably used, which is set up in such a way that its sharpness plane lies in the plane of the longitudinal seam to be produced (ie the joint at the joint between the longitudinal edges of the strip of metal deformed from the tube).
    An embodiment of the method according to the invention provides that the altitude of the joint, in particular by means of a laser device, is detected continuously.
    A further improvement of the method according to the invention results from the fact that alternatively (alternately) operated welding devices are used, which makes it possible to take the welding device out of operation and e.g. in particular, to renew its welding electrode while the other welding device is working, so that continuous welding of the longitudinal seam is possible.
    It is preferred within the scope of the invention if each of the welding devices has two welding heads. The two welding heads can be identical or different. For example, both welding heads for DC gas-shielded arc welding or both for AC inert gas welding can be set up. This is particularly advantageous when aluminum is to be welded.
    Also considered within the scope of the invention is an embodiment in which one of the welding heads is gas-welded to the AC shield and the second is set up for DC inert gas welding. With the help of the welding head, which is set up for DC chimney gas welding, the root of the longitudinal seam to be produced is welded and with the help of the subsequently operating welding device, which is arranged for arc welding, the longitudinal seam on its outside is made uniform and smoothed to achieve a smooth outer side of the longitudinal seam.
    As for the device according to the invention which is particularly preferred for carrying out the method according to the invention, it has a guide for the strip of metal bent to the tube and is characterized by at least one optical device which is provided for detecting the position of the seam.
    In order for the at least one welding device to track the position of the joint in which the longitudinal seam is to be welded, it can be adjusted transversely to the pipe.
    In the context of the invention, it is preferred if the device according to the invention has two welding devices each having two welding heads with electrodes, one of which is designed for DC inert gas welding and the other for AC inert gas welding. The combination of welding heads makes it possible to use a protective gas whose helium content is reduced compared to conventional shielding gas and, for example, between 10 and 40% by volume, in particular 30% by volume.
    In a preferred embodiment, a device for detecting the vertical position of the tube and thus the joint is provided, which is preferably a laser device, in particular a laser device which emits a fan laser beam is. It is preferred that the at least one welding device, which is adjustable transversely to the tube, not only horizontally but also vertically adjustable.
    Thus, with the device according to the invention, the joint between the juxtaposed longitudinal edges of the metal strip bent to the tube, ie the position of the joint, is located so that the welding heads of the welding devices can be correspondingly aligned during welding of the longitudinal seam.
    To locate the seam, a camera is preferably used within the scope of the invention, which camera is designed, for example, as a Scheimpflug camera whose focal plane lies in the plane of the joint between the longitudinal edges of the strip of metal bent to the tube.
    In one embodiment of the present invention, since two alternately used welding devices each have a DC welding head (welding the root of the seam) and an AC welding head (welding the head of the seam so that it becomes smooth), a particularly good one becomes and creates permanent seam. This achieves a better weld seam factor.
    Since two welding devices are provided, each with two welding heads, for example, an electrode change without interrupting the welding of the longitudinal seam is possible. If, in one welding device, the electrodes of the welding heads (these are preferably no consumption electrodes) are to be replaced, the other welding device works with its two welding heads.
    The method according to the invention and the device according to the invention are suitable for welding metal pipes of any desired type of metal, in particular for welding metal pipes made of aluminum, copper or steel.
    The device according to the invention allows an individual configuration of the welding parameters, since a separate welding head can be present for each electrode.
    Further details and features of the invention will become apparent from the following description of a preferred embodiment with reference to the drawings. It shows:
    1 shows a device according to the invention in an oblique view,
    Fig. 2 shows the detail A of FIG. 1 on an enlarged scale
    Fig. 3 shows the detail B of FIG. 2 on an enlarged scale and
    Fig. 4 is a LAsereinrichtung for detecting the height alignment of the tube.
    A device 1 according to the invention has, in the preferred and exemplary embodiment shown in the drawings, two welding devices 2, 3 arranged side by side.
    Each of the welding devices 2, 3 comprises a guide 4 for the tube 5, in the joint of which a longitudinal seam is to be welded in order to close the joint at the joint. The guides 4 include fixed in the machine frame jaws and provided in this slider.
    Each of the two welding devices comprises two welding heads 10, 11. The welding head 11 at the front with respect to the conveying direction (arrow 12) of the pipe 5 through the device 1 is a DC inert gas welding torch and the downstream welding head 10 is an AC inert gas welding torch.
    In particular, a gas mixture of argon and helium with 10% -40%, in particular 30% helium, used in the inventive method and in the device 1 according to the invention as a protective gas, which is possible because of the combination of the welding heads 10 and 11.
    The welding devices 2, 3 are adjustable transversely to the tube 5 in the vertical direction and in the horizontal direction, so that the welding heads 10, 11 of the detected position of the joint between the longitudinal edges of the metal strip bent to the tube 5, can be tracked when the longitudinal seam is welded.
    For detecting the position of the joint each welding head 10, 11 associated with an optical device 15, which is designed in the manner of a Scheimpflug camera. Here, (see Fig. 3) the Scheimpflug arrangement of the device 15 is oriented so that the focus plane lies in a plane which is the plane in which the joint is located. The location of the joint detected by the optical 15, which is designed in the manner of a Scheimpflug camera, allows the welding heads 10, 11 of each of the welding devices 2, 3 of the joint to be tracked.
    As shown in Fig. 1 and in particular in Fig. 2, each welding head 10, 11 associated with a separate Scheimpflug camera so that the welding heads 10, 11 can be tracked individually.
    Another device detects the height of the tubes 5 and thus also the height alignment of the joint, so that the welding heads 10, 11, in particular their welding electrodes (which are not formed as eating electrodes), held at the correct distance from the tube 5 and can be tracked accordingly. This device 20 comprises, for example, as a laser device 2 (fan laser or line laser) and is preferably arranged (in front of the DC welding gun 11) in relation to the conveying direction (arrow 12). Opposite the laser device 21 is a sensor 22, e.g. a CCD sensor provided. As FIG. 4 shows, the laser beam 3 emitted by the laser device 21 is partially covered by the tube 5, so that only the part lying above the tube 5 strikes the sensor 22.
    The method according to the invention and the device according to the invention are basically independent of the type of welding process and thus suitable for any welding process. Thus, within the scope of the invention, not only inert gas welding but, for example, also laser welding, are considered.
    In summary, an embodiment of the invention can be described as follows.
    For welding a longitudinal seam of ducts of cables, wherein the cladding tubes consist of a metal strip bent into a tube 5, a device 1 is provided which has two welding devices 2, 3 each with two welding heads 10, 11. The welding guns of the welding heads 10, 11 are tracked by means of optical devices 15 which are formed like a Scheimpflug camera and which detect the position of the joint (joint) between the longitudinal edges of the metal strip bent to the tube 5, the joint, while the Longitudinal seam is welded. Another laser device 20, detects the altitude of the tube 5, so that the welding heads 10, 11 are held at the correct distance from the tube 5 and can be tracked accordingly.
    By using two welding devices 2, 3, it is possible to use the respective other welding device 3 or 2 during maintenance work or replacement of the welding electrodes of the welding heads 10, 11 of one welding device 2 or 3, so that continuous work is possible.
    权利要求:
    Claims (14)
    [1]
    A method of welding the joint of strips of metal bent into tubes (5) to form a longitudinal seam, characterized in that the position of the joint is detected continuously and that the at least one welding device (2, 3), in particular at least an electrode of the same, is tracked continuously.
    [2]
    2. The method according to claim 1, characterized in that the position of the joint is detected by means of an optical device (15).
    [3]
    3. The method according to claim 2, characterized in that as a visual device (15) a camera, in particular a Scheimpflug camera whose focus plane is in the plane of the joint is used.
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the altitude of the joint is detected continuously.
    [5]
    5. The method according to claim 4, characterized in that the height of the joint is detected by means of a laser device 20, in particular with a device 21 which emits a fan laser.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that for welding two alternately operated welding devices (2, 3) are used.
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that the seam is welded in a first step at its root, in particular with DC inert gas welding, and in a subsequent step, in particular with AC inert gas welding, made uniform and smoothed.
    [8]
    8. The method according to claim 7, characterized in that a gas mixture of argon and helium with 10% -40%, in particular 30% helium, is used as protective gas.
    [9]
    9. Device (1) for carrying out the method according to one of claims 1 to 8 with a guide (4) for the tube (5) bent strip, characterized in that an optical device (15) for detecting the position of the joint provided is, and that the at least one welding device (2, 3) transversely to the tube (5) is adjustable.
    [10]
    10. The device according to claim 9, characterized in that two welding devices (2, 3) are provided with two welding heads (10, 11).
    [11]
    11. Device according to one of the claim 9 or 10, characterized in that the welding device (2, 3), in particular each welding head (10, 11) thereof, as an optical device (15) is associated with a camera, in particular a Scheimpflug camera ,
    [12]
    12. Device according to one of claims 9 to 11, characterized in that a device 20 for detecting the height position of the tube (5) is provided.
    [13]
    13. The apparatus according to claim 12, characterized in that the means 20 for detecting the altitude of a laser device, in particular a laser device which emits a fan laser beam, is.
    [14]
    14. Device according to one of claims 9 to 13, characterized in that the welding heads (10, 11) of the welding devices (2, 3) are horizontally and / or vertically adjustable.
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    同族专利:
    公开号 | 公开日
    AT515464B1|2015-12-15|
    WO2015135012A1|2015-09-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB1286485A|1968-09-11|1972-08-23|Charles Albert Babbitt|Improvements in or relating to methods and apparatus for forming a tube from flat metal sheet material|
    US4577796A|1984-10-10|1986-03-25|Kaiser Steel Corporation|Method and apparatus for tracking seam welds on pipes and the like|
    DE2606123C2|1976-02-16|1983-09-22|Drews, Paul, Prof.Dr.-Ing., 5100 Aachen|Method and device for guiding a welding head for arc welding on the center of the joint|
    DE3606069C2|1986-02-21|1990-06-13|Mannesmann Ag, 4000 Duesseldorf, De|
    TW277013B|1994-07-29|1996-06-01|Hitachi Shipbuilding Eng Co|
    US6847008B2|2003-01-17|2005-01-25|Lincoln Global, Inc.|Electric arc welding system|
    DE102010007573B4|2010-02-10|2012-06-21|Thyssenkrupp Lasertechnik Gmbh|Apparatus and method for continuous welding of strips and / or sheets|CN111590163A|2020-05-25|2020-08-28|中国化学工程第六建设有限公司|Automatic welding equipment suitable for small-caliber instrument pipeline and process heat tracing pipe|
    法律状态:
    2019-11-15| MM01| Lapse because of not paying annual fees|Effective date: 20190311 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA173/2014A|AT515464B1|2014-03-11|2014-03-11|Method and device for welding longitudinal seams|ATA173/2014A| AT515464B1|2014-03-11|2014-03-11|Method and device for welding longitudinal seams|
    PCT/AT2015/000039| WO2015135012A1|2014-03-11|2015-03-11|Method and apparatus for welding longitudinal seams|
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