• 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 a welding device (1), in particular a laser welding device, for welding metallic workpieces (3), having at least one welding head (2), in particular a laser welding head, by which a working area (4) is defined, characterized by at least one 4) acting heater (5) for heating the workpiece (3), in particular before and / or after the welding operation.
    公开号:AT514840A1
    申请号:T50593/2013
    申请日:2013-09-17
    公开日:2015-04-15
    发明作者:Klaus Grausgruber；Michael Dipl Ing Dr Thaler
    申请人:Stiwa Holding Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a welding device, in particular laser welding device, for welding workpieces, with at least one welding head, in particular laser welding head, which is directed in the working position on a work area. The invention also relates to a welding method.
    EP0739678B1 discloses a method for producing welded steel pipes. In this case, an inductor is used, which is open to one side and thereby can be positioned over a pipe to be welded. The inductor serves to preheat the tube. The disadvantage of such an inductor is that the preheating can not be uniform over the entire circumference of the tube, resulting in undesirable stresses in the weld area.
    DE19637465C1, in connection with beam welding, discloses a two-turn half-shell inductor for preheating the workpiece. The disadvantage of uneven preheating manifests itself here even more than in the welding device of the previous document.
    DE4017634A1 and EP0262363B1 also disclose inductive preheating of a workpiece to be welded. Here, the disadvantage is that the workpiece has to be threaded into the inductor and therefore can only be conveyed along its longitudinal extension or introduced into the welding device.
    The object of the invention is to eliminate the disadvantages resulting from the prior art and to provide a welding device with which, on the one hand, a uniform heating of the workpiece can be achieved even in the immediate region of the (future) weld seam. In embodiments, the introduction of the workpiece or two workpiece parts to be joined together should be substantially facilitated. The welding device should be characterized by space-saving design and easy to control.
    This object is achieved with a welding device of the type mentioned above in that the welding device comprises at least one heating device acting on the working area for heating the workpiece, in particular before and / or after the welding operation. This increases the quality of welding and in particular prevents cracks in the material. Preferably, the heating device is provided in addition to the welding head, so represents its own heat or energy source.
    The heating device can be designed as a preheating unit and / or as a reheating unit. Even during the actual welding operation, the heater may be operated to assist the heat input by the welding head. It is also possible to design a heating device as a preheating unit (laser source) and to design a further heating device as a reheating unit (inductor).
    Working area is understood to mean that area which, in the working position or in the working positions of the welding head put into operation, is influenced directly by the latter (melting) and indirectly (temperature introduction). In other words, this is an area around the (emerging) weld. The work area is not limited to the weld as such, but also includes an area extending around the weld. The welding head may e.g. be designed so that it re-starts the working position at each welding cycle and now remains in a waiting position.
    A preferred embodiment results from the fact that the heating device or at least a part of the heating device is movable relative to the work area, wherein preferably the heating device or at least a part of the heating device is connected to a drive and driven by this. This he facilitates the introduction and the change of workpieces, whereby the cycle time can be increased. The heater or a part thereof can be moved away from the work area to temporarily create space there. Once the workpiece is positioned, the heater or one of its parts can be moved back into its / its working position to provide there for a heating of the workpiece. Also, the drive of the heater or a part thereof can be used to ensure a uniform heating of the workpiece, e.g. The heating device can rotate around the work area during the heating process.
    Preferably, the working area in the working position is surrounded by a housing-like structure which forms a chamber around the area of the emerging weld. The box-like structure may have at least one opening for the introduction of protective gas and / or at least one opening for the outlet of protective gas and / or a working opening for introducing the energy of the welding head. As a result, the heat is held in the area of the weld and ensures a sparing use of a flushing medium.
    Preferably, the housing-like structure is formed of thermally insulating material or surrounded by a thermal insulation layer.
    A preferred embodiment results from the fact that the heating device comprises at least one arranged in the working area electromagnetic inductor for heating the workpiece by induction. This ensures a particularly simple and uniform heating. The control and regulation of an electromagnetic inductor has proven to be particularly reliable.
    A preferred embodiment results from the fact that the inductor is formed from at least two inductor parts which are movable relative to one another in order to enclose a workpiece to be welded in a working position and to release the workpiece in an open position in which the inductor parts are spaced apart from one another.
    The advantage of this embodiment is to be seen in particular in that the introduction of the workpiece or workpiece parts to be joined together (joint welding) into the welding device or the positioning of the workpiece in the work area of the welding head can be done in a very simple manner. In the open position of the inductor, the inductor parts are sufficiently spaced apart so that the workpiece from different directions, in particular also transversely to the longitudinal extent of the workpiece, can be introduced. It is no longer necessary to thread the (elongated) workpiece into the inductor.
    The Induktorteile are preferably segments of an annular structure in its entirety, which surrounds an elongated workpiece in the working position. In a preferred embodiment, two inductor parts are provided which form essentially equal half-segments of the inductor. Of course, more than two inductor parts are also conceivable, and the same size of the inductor parts is not mandatory. The ring-shaped structure does not necessarily have to be annular, but could also be provided with corners (for example, quadrangular or even polygonal).
    The welding device is preferably a laser welding device with a laser processing head, since the emitted photons remain uninfluenced by the magnetic field of the inductor and thus an inductive heating also without problems during the actual welding process (laser beam is directed to the workpiece). In principle, however, functioning welding devices would also be conceivable on another principle: beam welding (laser, electrons), arc welding, MAG
    A preferred embodiment results from the fact that the inductor parts in the direction transverse, preferably perpendicular to the axis of the inductor relative to each other are movable. This represents a particularly space-saving and advantageous in terms of workpiece handling solution.
    A further preferred embodiment results from the fact that at least one of the inductor parts is connected to a drive and can be driven by this relative to the other inductor part. A manual operation is not required, which is particularly at high temperatures of great advantage. It would of course also be possible to drive both inductor parts by a common or separate drives. It is important that an open position is reached, in which a workpiece can be introduced into the work area.
    In another embodiment, the heating device or at least a part of the heating device could be designed to be movable parallel to the longitudinal axis of the workpiece.
    A further preferred embodiment results from the fact that the welding device comprises a control device which is connected to the drive and controls it automatically. This allows a far-reaching automation of the welding process. Together with a conveyor for the supply and removal of the workpieces or for their positioning in the work area, in particular a driven chain or belt, the entire process can be automated.
    A further preferred embodiment results from the fact that the welding device has at least two housing parts, which are movable relative to each other to form a chamber around the working area in a working position, and that one of the inductor parts in one of the housing parts and another inductor part in another Housing part is integrated. The housing parts form a more or less enclosed chamber, which can serve for the economical provision of a flushing medium in the work area. In addition, the housing parts prevent the heat from being lost to the outside. The (energy) efficiency of such a process can thus be greatly increased.
    A further preferred embodiment results from the fact that the inductor parts each sit on the inner wall of the housing parts. This allows a particularly compact and space-saving solution in which the Induktorteile can be placed particularly close to the (future) weld.
    A further preferred embodiment results from the fact that at least one of the housing parts has an inlet for the supply of a flushing medium.
    A further preferred embodiment results from the fact that at least one of the housing parts has an outlet for the removal of a flushing medium.
    A further preferred embodiment results from the fact that at least one of the housing parts has a working opening through which heat energy can pass from the welding head arranged outside the chamber to the workpiece. The welding head is arranged outside the housing parts. The introduced into the chamber and thus in the work area heat energy is released only very slowly to the environment.
    Preferably, the housing parts are surrounded by an insulation made of thermally insulating material, whereby the effect of the heat concentration in the work area is further enhanced.
    A further preferred embodiment results from the fact that a temperature sensor is arranged in the working area, which is preferably coupled to one of the inductor parts. A temperature measurement in the immediate working range allows the control of important process parameters, in particular the performance, whereby the particularly good quality of the weld is ensured.
    A further preferred embodiment results from the fact that the number of turns of the inductor is symmetrical with respect to the working range. This ensures a uniform inductive preheating and / or reheating or a uniform inductive heating during the actual welding process. Symmetrical in this context means that the same number of current-carrying windings are provided on both sides of the weld.
    A further preferred embodiment results from the fact that the welding device comprises a control device, which is connected to the power supply of the inductor, to the welding head and optionally to the temperature sensor. As a result, a fully automated control of the welding device according to the invention can be realized.
    A further preferred embodiment results from the fact that the heating device is a radiation source, in particular a laser source, wherein preferably the radiation source is rotatable by a drive around the working area. Due to the rotation, all areas of the weld can be uniformly irradiated.
    A further preferred embodiment results from the fact that the heating device comprises beam deflecting means which deflects beams emitted by the welding head and directs them onto the working area. In this embodiment, the energy of the welding head can be used simultaneously for preheating and / or reheating.
    A further preferred embodiment results from the fact that the heating device comprises at least one electric heating element.
    A further preferred embodiment results from the fact that the at least one heating device is designed such that it acts on both sides of the weld on the workpiece.
    A further preferred embodiment results from the fact that a first heating device acts on one side of the weld and a second heater acts on the other side of the weld.
    These two embodiments also ensure uniform heating of the workpiece.
    A further preferred embodiment results from the fact that the welding device comprises at least two juxtaposed welding stations or welding tracks, which can be equipped with at least one movable workpiece carrier with workpieces or workpiece parts to be welded, and that the at least one heating device is designed such that workpieces or workpiece parts timed clocked with the heating device are heated, where in preferably each welding station or each welding path includes its own heating device. This allows a parallel operation, whereby the cycle times can be significantly shortened. Thus, a preheating can take place at a first welding path, while another welding path can already be equipped with a workpiece. If welding is carried out on the first welding path, it is already possible to preheat on the second welding path. The workpiece carrier ensures a constant loading of the welding tracks. There are no dead times.
    The object is also achieved with a welding method, in particular laser welding method, for welding metallic, in particular workpieces with a welding device according to one of the preceding claims, characterized by the steps: positioning a workpiece to be welded in the work area of the welding head; Performing the welding process by operating the welding head; and heating the workpiece by the heater before, during and / or after the welding operation.
    Welding method, in particular laser welding method, for welding of metallic, in particular elongated workpieces with a welding device according to one of the preceding embodiments, characterized by the steps: positioning a workpiece to be welded in the work area of the welding head while the inductor is in an open position in which the inductor parts are spaced apart from each other; Relatively moving the inductor parts to the working position to enclose the workpiece to be welded; Performing the welding process by operating the welding head; and heating the workpiece by energizing the inductor.
    In addition to the advantages already mentioned, it should be mentioned here that the additional heating of the workpiece by induction can have the following advantageous effects: reduction of the energy consumption of the welding head; Uniform pre-heating and / or reheating to prevent hardening cracks; and slow and controlled cooling to increase the strength of the weld.
    A preferred embodiment results from the fact that a heating of the workpiece by the heating device (for example, energization of the inductor) takes place before the welding operation, wherein preferably the duration of the heating process before the welding process is at least 0.5 s, preferably at least 1 s. As a result of this measure, the workpiece or the workpiece parts in the region of the (future) weld seam are brought to a predetermined temperature level (for example between 300 ° C. and 400 ° C.). The power of the welding head, e.g. Laser welding head can therefore be smaller.
    A further preferred embodiment results from the fact that a heating of the workpiece by the heating device (for example, energization of the inductor) takes place during the welding process. The heater supports the heat development in the workpiece, without being able to perform a welding process alone.
    A further preferred embodiment results from the fact that a heating of the workpiece by the heating device (for example, energization of the inductor) takes place after the welding operation, wherein preferably the duration of the heating process after the welding process is at least 5 s, preferably at least 10 s. Such a post-treatment is particularly advantageous according to the invention, since immediately after the welding operation, the weld seam can be kept at a predetermined temperature level (preferably between 300 ° C and 400 ° C), in order to suppress cracks in the material. The location of the heater (e.g., inductor) in the work area or its alignment with the work area ensures on-site that the temperature does not drop below an unfavorable temperature for the weld to harden. A separate heat treatment outside the welding device is therefore no longer necessary.
    A further preferred embodiment results from the fact that before, during and / or after the welding process, a temperature measurement is carried out by a temperature sensor arranged in the working area and that the heating of the workpiece by energizing the inductor in response to the temperature measurement is controlled by a control device. This allows a particularly accurate temperature control and leads to high quality welds.
    A preferred embodiment is laser welding with an integrated induction heating process. A split inductor travels from above and below over the workpiece to be welded, e.g. a tube after the conveyor, e.g. Chain, is clocked. This brings a marked reduction in non-value-added movements, otherwise the workpiece (pipe) would have to be threaded. The preheating time is about 1-2 s. Subsequently, the laser welding takes place. The reheating time is depending on the material at least about 10s.
    By this measure, there is absolutely no interruption between the laser welding and the reheating. Hardening cracks are avoided and a secure process is guaranteed. Subsequently, the Induktorteile move apart and the conveyor chain is weiteretaktaktet.
    Thus, preheated, welded and reheated in a single module. It is preferably only a small inductor necessary (heat only where needed), which energy can be saved.
    As already mentioned, the inductor can be integrated in a shell or a housing, which is flooded with purge gas and forms a kind of chamber around the weld area. On the opposite side, a suction channel may be provided for the purge gas. A temperature measurement, in particular within the chamber can be provided.
    The inventive method can be used both in the production of round and longitudinal seams.
    The weld head may rotate relative to the workpiece or the workpiece may rotate relative to the weld head.
    For a better understanding of the invention, this will be explained in more detail with reference to the following figures.
    In each case, in a highly simplified, schematic representation:
    1 shows a welding device according to the invention;
    FIG. 2 shows a housing part with integrated inductor part; FIG.
    3 shows the outside of two associated housing parts.
    4 shows a section of a welding device according to the invention;
    Fig. 5 shows an embodiment of a chamber forming housing parts;
    6 shows the temperature profile in the immediate region of the weld seam;
    FIG. 7 shows an embodiment with a radiation-emitting fleece device; FIG.
    8 shows an embodiment with parallel welding stations or welding tracks.
    By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.
    The embodiments show possible embodiments of the welding device, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but also various combinations of the individual embodiments are possible with each other and this possibility of variation due to the teaching of technical action by representational Invention in the skill of those skilled in this technical field.
    Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.
    The task underlying the independent inventive solutions can be taken from the description. All statements of value ranges in the present description should be understood to include any and all sub-ranges thereof, e.g. is the statement 1 to 10 to be understood that all sub-areas, starting from the lower limit 1 and the upper limit 10 are included, ie. all sub-areas begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.
    Above all, the individual embodiments shown in the figures can form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.
    For the sake of order, it should finally be pointed out that for a better understanding of the construction of the welding device, these or their components have been shown partly unevenly and / or enlarged and / or reduced in size
    1 shows a welding device 1 in the form of a laser welding device, for welding workpieces 3, with at least one laser welding head 2, which is directed to a working area 4 in the working position. The welding device comprises at least one heating device 5 acting on the working area 4 for heating the workpiece 3, in particular before and / or after the welding operation or also during the welding operation.
    In the illustrated embodiment, the heating device 5 or at least a part 6, 7 of the heating device 5 is movable relative to the working area 4. For this purpose, a part 6 of the heater 5 is connected to a drive 8 and driven by this. The drive 8 may e.g. be a pneumatic, a hydraulic, an electric or magnetic drive.
    In the illustrated embodiment, the heating device comprises at least one inductor 5 arranged in the working area 4 for heating the workpiece 3 by induction. The inductor 5 is formed from at least two inductor parts 6, 7 which are movable relative to each other to enclose a workpiece 3 to be welded in a working position and to release the workpiece 3 in an open position in which the inductor parts 6, 7 are spaced from each other , While Fig. 1 shows an open position, in Figs. 4 and 5, the working position of the inductor 5 can be seen. The arranged around the work area 4 current-carrying windings 9, 10 of the inductor 6, 7 are shown purely schematically and could have any suitable course.
    The inductor parts 6, 7 are movable in the direction transverse, preferably perpendicular to the axis 19 of the inductor 5 (FIG. 4) relative to one another. At least one of the inductor parts 6 can be connected to a drive 8 and can be driven by this relative to the other inductor part 7. The inductor parts can close around the workpiece from above and below or else from the lateral direction (FIG. 5).
    The welding device 1 of FIG. 1 also comprises a control device 12, which is connected to the drive 8 and controls it automatically.
    In the illustrated embodiment, the welding apparatus 1 has at least two housing parts 14, 15 which are movable relative to one another in order to form a chamber 21 (FIG. 4) around the working area 4 in a working position. In this case, one of the inductor parts 6 is integrated in one of the housing parts 14 and another inductor part 7 in another housing part 15. The inductor parts 6, 7 preferably sit on the inner wall of the housing parts 14, 15, respectively.
    As can be seen from Fig. 2, the housing parts are formed in a half-shell shape and can thus form a more or less closed chamber 21 to the work area 4.
    As can be seen from Fig. 3, in which the housing parts are depicted from the outside (top and bottom), one of the housing parts 14 has an inlet 17 for the supply of a flushing medium (for example shielding gas). The other housing part 15 has an outlet 18 for the removal of a flushing medium. One of the housing parts 15 has a working opening 16 through which heat energy from the welding head 2 arranged outside the chamber 21, in particular in the form of a laser beam, can reach the workpiece 3 (see also FIG. 4).
    In the working area 4, a temperature sensor 13 is arranged, which is preferably coupled to an inductor part 7 and is seated within the housing part 15.
    The number of turns of the inductor 5 with respect to the working area (4) is preferably symmetrical, e.g. one turn to the left and right of the weld (Fig. 4).
    Fig. 5 shows a particularly preferred embodiment, in which the housing or the housing-like structure is surrounded by a thermal insulation 20. Alternatively, the housing 14, 15 itself could be formed of thermally insulating material. It is also possible to introduce the welding beam between the housing parts 14, 15 into the chamber 21.
    The control device 12 is also connected to a power supply 11 of the inductor 5, to the welding head 2 and optionally to the temperature sensor 13 in order to ensure an automated process flow.
    As shown in the embodiment of FIG. 7, the heating device 22 may also be a radiation source, in particular a laser source, which is preferably rotatable by a drive 8 around the working area 4, e.g. around the longitudinal axis of the workpiece 3. The representation of the drive 8 is purely schematic and is only illustrative. Again, it may be a rotary or linear drive, e.g. is driven electrically, magnetically, pneumatically or hydraulically.
    Alternatively, the heating device could also comprise radiation means which deflects beams emitted by the welding head 2 and directs them onto the working area 4.
    It would also be conceivable that the heating device comprises at least one electric heating element.
    It is particularly preferred if the at least one heating device is designed such that it acts on both sides of the weld on the workpiece 3, as shown for example in Fig. 4. A first heating device 5, 22 could also act on one side of the weld and a second heating device 5, 22 act on the other side of the weld (FIG. 7).
    In the embodiment of FIG. 8 it can be seen that the welding device 1 comprises at least two (here three) juxtaposed welding stations or welding paths, which can be equipped by at least one workpiece carrier 23 with workpieces 3 or workpiece parts to be welded. The heating device or heating devices are designed in such a way that workpieces 3 or workpiece parts can be heated with the heating device in timed fashion, wherein preferably each welding station or each welding path comprises its own heating device.
    In the following, the preferred welding methods are described in more detail. It is a welding process, in particular laser welding process, for welding workpieces 3 with one of the welding devices described above. The method comprises the steps of: positioning a workpiece 3 to be welded in the work area 4 of the welding head; Implementation of the welding process by pressing the welding head 2; and heating the workpiece 3 by the heater 5, 22 before, during and / or after the welding operation.
    Preferably, it is a welding method, in particular laser welding method, for welding metallic workpieces 3 characterized by the steps: positioning a workpiece 3 to be welded in the working area 4 of the welding head 2 while the inductor 5 is in an open position, in which the inductor parts 6, 7 are spaced apart from each other; Relatively moving the inductor 6, 7 in the working position to enclose the workpiece 3 to be welded; Implementation of the welding process by pressing the welding head 2; and heating the workpiece 3 by energizing the inductor. 5
    Preferably, the workpiece 3 is heated by the heating device 5, 22 before the welding process, wherein preferably the duration of the heating process before the welding process is at least 0.01 s (seconds), preferably at least 0.5 s, particularly preferably at least 1 s. Particularly short preheating times can be achieved with a laser source as a heating device.
    Preferably, the workpiece 3 is heated by the heating device 5, 22 during the welding process.
    Preferably, the workpiece 3 is heated by the heating device 5, 22 after the welding process, wherein preferably the duration of the heating process after the welding process is at least 5 s, preferably at least 10 s.
    It should be noted at this point that the above-mentioned times are purely exemplary and may be preferred for a particular constellation (in particular in induction). However, the actual required pre- and / or post-heating times depend on the type of material, the shape of the material and in particular on the material thickness.
    With reference to FIG. 6, a preferred operation will be described in more detail. In a first step, the temperature of the workpiece 3 is controlled by the heater, e.g. the inductor 5, to a value between 300 ° C and 450 ° C, preferably to a value between 320 ° C and 400 ° C (here: 370 ° C) brought. In a further step, the actual welding operation is carried out by actuation of the welding head 2. Here, depending on the material, high temperatures are achieved (for example between 800 ° C. and 900 ° C., in this case 850 ° C., whereby substantially higher temperatures are possible). In a subsequent step, immediately after the welding process, the workpiece is held by the heating device at a value between 250 ° C and 400 ° C, preferably at a value between 300 ° C and 380 ° C (here: 330 ° C). By the heater according to the invention prevents the temperature after the welding process in undesirable
    Way falls sharply before a heat treatment step takes place (dashed line in Fig. 6).
    In a preferred embodiment, a temperature measurement is carried out before, during and / or after the welding operation by a temperature sensor 13 (FIG. 1) arranged in the working area 4, and the heating of the workpiece 3 is controlled by the control unit 12 as a function of the temperature measurement.
    REFERENCE SIGNS LIST 1 Welding device 2 Welding head 3 Workpiece 4 Working area 5 Inductor 6 First inductor part 7 Second inductor part 8 Drive 9 Winding 10 Winding 11 Power supply 12 Control device 13 Temperature sensor 14 first housing part 15 second housing part 16 Working opening 17 Inlet 18 Outlet 19 Axis of the inductor 5 20 Insulation 21 Chamber 22 radiation source 23 workpiece carrier
    权利要求:
    Claims (29)
    [1]
    1. Welding device (1), in particular laser welding device, for welding workpieces (3), with at least one welding head (2), in particular laser welding head, which is directed in the working position on a work area (4), characterized by at least one on the work area (4) acting heater (5) for heating the workpiece (3), in particular before and / or after the welding operation.
    [2]
    2. Welding device according to claim 1, characterized in that the heating device (5, 22) or at least a part (6, 7) of the heating device (5, 22) relative to the working area (4) is movable, wherein preferably the heating device (5, 22) or at least a part (6, 7) of the heating device (5, 22) connected to a drive (8) and can be driven by this.
    [3]
    3. Welding device according to claim 1 or 2, characterized in that the heating device comprises at least one in the working area (4) arranged inductor (5) for heating the workpiece (3) by induction.
    [4]
    4. Welding device according to claim 3, characterized in that the inductor (5) from at least two inductor parts (6, 7) is formed, which are movable relative to each other to enclose in a working position a workpiece to be welded (3) and in an open position in which the inductor parts (6, 7) are spaced from each other, to release the workpiece (3).
    [5]
    5. Welding device according to claim 4, characterized in that the inductor parts (6, 7) in the direction transversely, preferably perpendicular to the axis (19) of the inductor (5) are movable relative to each other.
    [6]
    6. Welding device according to one of claims 3 to 5, characterized in that at least one of the inductor parts (6, 7) connected to a drive (8) and by this relative to the other inductor part (7, 6) is drivable.
    [7]
    7. Welding device according to one of claims 2 to 6, characterized in that the welding device (1) comprises a control device (12) which is connected to the drive (8) and controls it automatically.
    [8]
    8. Welding device according to one of claims 3 to 7, characterized in that the welding device (1) at least two housing parts (14, 15) which are movable relative to each other, in a working position, a chamber (21) to the working area (4 ), and that one of the inductor parts (6) is integrated in one of the housing parts (14) and another inductor part (7) is integrated in another housing part (15).
    [9]
    9. Welding device according to claim 8, characterized in that the inductor parts (6, 7) in each case on the inner wall of the housing parts (14, 15) sit.
    [10]
    10. Welding device according to claim 8 or 9, characterized in that at least one of the housing parts (14) has an inlet (17) for the supply of a flushing medium.
    [11]
    11. Welding device according to one of claims 8 to 10, characterized in that at least one of the housing parts (15) has an outlet (18) for the removal of a flushing medium.
    [12]
    12. Welding device according to one of claims 8 to 11, characterized in that at least one of the housing parts (14, 15) has a working opening (16), by the heat energy from the outside of the chamber arranged welding head (2), in particular in the form of a laser beam , can get to the workpiece (3).
    [13]
    13. Welding device according to one of the preceding claims, characterized in that in the working area (4), a temperature sensor (13) is arranged, which is preferably coupled to one of the inductor parts (6, 7).
    [14]
    Welding device according to one of claims 3 to 13, characterized in that the number of turns of the inductor (5) is symmetrical with respect to the working area (4).
    [15]
    15. Welding device according to one of claims 3 to 14, characterized in that the welding device (1) comprises a control device (12) provided with a power supply (11) of the inductor (5), with the welding head (2) and optionally with the Temperature sensor (13) is connected.
    [16]
    16. Welding device according to one of the preceding claims, characterized in that the heating device (22) is a radiation source, in particular a laser source, wherein preferably the radiation source by a drive (8) about the working area (4) is rotatable.
    [17]
    17. Welding device according to one of the preceding claims, characterized in that the heating device comprises beam deflection means which deflects beams emitted by the welding head (2) and directs them onto the working area (4).
    [18]
    18. Welding device according to one of the preceding claims, characterized in that the heating device comprises at least one electric heating element.
    [19]
    19. Welding device according to one of the preceding claims, characterized in that the at least one heating device is designed such that it acts on both sides of the weld point on the workpiece (3).
    [20]
    20. Welding device according to one of the preceding claims, characterized in that a first heating device (5, 22) acts on one side of the weld and a second heater (5, 22) acts on the other side of the weld.
    [21]
    21. Welding device according to one of the preceding claims, characterized in that the welding device (1) comprises at least two juxtaposed welding stations or welding tracks, which can be equipped with at least one workpiece carrier (23) to be welded workpieces (3) or workpiece parts, and that the at least one heating device (5, 22) is designed such that workpieces (3) or workpiece parts can be heated timed with the heating device (5, 22), wherein preferably each welding station or each welding path comprises its own heating device (5, 22) ,
    [22]
    22, welding method, in particular laser welding method, for welding workpieces (3) with a welding apparatus according to one of the preceding claims, characterized by the steps of: positioning a workpiece to be welded (3) in the work area (4) of the welding head; Carrying out the welding operation by operating the welding head (2); and heating the workpiece (3) by the heating means (5) before, during and / or after the welding operation.
    [23]
    23. Welding method, in particular laser welding method, for welding of metallic workpieces (3) with a welding device according to one of claims 4 to 15 characterized by the steps: positioning a workpiece to be welded (3) in the work area (4) of the welding head (2) while the inductor (5) is in an open position in which the inductor parts (6, 7) are spaced from each other; Moving the inductor parts (6, 7) relative to the working position to enclose the workpiece (3) to be welded; Carrying out the welding operation by operating the welding head (2); and heating the workpiece (3) by energizing the inductor (5).
    [24]
    24. Welding method according to claim 22 or 23, characterized in that a heating of the workpiece (3) by the heating device (5, 22) takes place before the welding operation.
    [25]
    25. Welding method according to claim 24, characterized in that the workpiece (3) during the preheating by the heating device (5, 22) in the region of the future weld to a temperature between 300 ° C and 450 ° C, preferably between 320 ° C and 400 ° C is brought.
    [26]
    26. Welding method according to one of claims 22 to 25, characterized in that a heating of the workpiece (3) by the heating device (5, 22) takes place during the welding operation.
    [27]
    27. Welding method according to one of claims 22 to 26, characterized in that a heating of the workpiece (3) by the heating device (5, 22) takes place after the welding operation.
    [28]
    28. Welding method according to claim 27, characterized in that the workpiece (3) during reheating by the heating device (5, 22) in the region of the weld at a temperature between 250 ° C and 400 ° C, preferably between 300 ° C and 380 ° C is held.
    [29]
    29. Welding method according to one of claims 22 to 28, characterized in that before, during and / or after the welding process, a temperature measurement by a in the work area (4) arranged temperature sensor (13) and that the heating of the workpiece (3) by the Heating device (5, 22) in response to the temperature measurement of a control device (12) is controlled.
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    同族专利:
    公开号 | 公开日
    AT514840B1|2015-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0980736A2|1998-08-19|2000-02-23|Daido Tokushuko Kabushiki Kaisha|Diffusion bonding apparatus|
    GB2478275A|2010-02-24|2011-09-07|Tubefuse Applic V O F|Induction heating apparatus and method|DE102020117169A1|2020-06-30|2021-12-30|Audi Aktiengesellschaft|Welding device|
    DE102016211321A1|2016-06-24|2017-12-28|MTU Aero Engines AG|Induction heating device, device with at least one induction heating device and method for inductive heating of components or a component material|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50593/2013A|AT514840B1|2013-09-17|2013-09-17|welder|ATA50593/2013A| AT514840B1|2013-09-17|2013-09-17|welder|
    PCT/AT2014/050206| WO2015039154A1|2013-09-17|2014-09-16|Welding device comprising an active heating device for heating the workpiece|
    CN201480061224.1A| CN105705295B|2013-09-17|2014-09-16|Include the welding equipment of the heater to work for heated partses|
    US15/022,237| US10166635B2|2013-09-17|2014-09-16|Welding device comprising an active heating device for heating the workpiece|
    MX2016003377A| MX2016003377A|2013-09-17|2014-09-16|Welding device comprising an active heating device for heating the workpiece.|
    EP14796394.6A| EP3046722B1|2013-09-17|2014-09-16|Welding device comprising an active heating device for heating the workpiece|
    HUE14796394A| HUE037831T2|2013-09-17|2014-09-16|Welding device comprising an active heating device for heating the workpiece|
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