• 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 method and a device (1) for producing a weld or a three-dimensional structure (26) on a surface of a metallic workpiece (14) by means of a welding torch (7) for carrying out a welding process with a welding torch (7) Welding wire (9), wherein between the welding wire (9) and the workpiece (14) an arc (13) is ignited and for stabilizing the arc (13) a laser (27 ') for emitting a laser beam (27) with a power of maximum 2000 W, with a point of incidence at that location on the surface of the workpiece (14) at which the weld or structure (26) is made. An improvement in the stabilization of the arc (13) is achieved when the laser (27 ') is connected to a device (28) for controlling the laser (27'), which control device (28) for activating the laser beam (27) before Ignition of the arc (13) is formed.
    公开号:AT512081A1
    申请号:T1592/2011
    申请日:2011-10-28
    公开日:2013-05-15
    发明作者:Andreas Waldhoer；Stephan Schartner
    申请人:Fronius Int Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a method for producing a weld or a three-dimensional structure on a surface of at least one metallic workpiece, preferably of titanium or a titanium alloy, by means of a welding process, wherein an arc is ignited between a guided in a welding torch welding rod and the workpiece, and with the welding wire the weld or structure is made.
    The invention further relates to an apparatus for producing a weld or a three-dimensional structure on a surface of at least one metallic workpiece, preferably titanium or a titanium alloy, using a welding torch for carrying out a welding process with a welding wire guided in the welding torch, wherein between the welding wire and the Workpiece is ignited an arc.
    In particular, when welding workpieces of titanium or a titanium alloy, the use of active gases {e.g. CO2 or O2) are not desirable, as these react with the material of the workpiece and can lead to oxidation and as a result to embrittlement of the connection point. The elimination of active gases, however, eliminates the arc stabilizing effect of the active gases, which is why it comes to instabilities of the arc and as a result to deterioration of the quality of welding. Thus, the arc does not remain on a point of the surface, but moves back and forth on this.
    Titanium or titanium alloy workpieces are commonly used in the aircraft industry because of their low specific gravity. For connecting such workpieces with composite materials, in particular carbon composite materials (CFRP carbon fiber reinforced plastics), which are also widely used in the aircraft industry, it is common to arrange on the surface of the metallic workpiece three-dimensional structures, usually in the form of short rods or pins to which the composites can be attached. A method and an apparatus for producing such three-dimensional structures on a surface of a metallic workpiece are known, for example, from AT 506 217 B1
    Service. Due to the above-mentioned inadmissibility of the use of active gases, difficulties also arise in the production of such three-dimensional structures due to the instabilities of the arc. As a result, the connection of the three-dimensional structures on the surface of the metallic workpiece can be insufficiently stable. Countermeasures such as an increase in arc performance, which results in an increase in heat input, are not effective, especially for very thin workpieces (e.g., <1mm), because they would result in undue distortion of the workpieces.
    Although the subject description is directed to workpieces made of titanium or a titanium alloy, the measures are also advantageous for workpieces made of other, equivalent materials, such as aluminum, aluminum alloys, galvanized steel, chrome-nickel steel or the like.
    The object of the present invention is to provide an above-mentioned method and device for producing a weld or a three-dimensional structure on a surface of a metallic workpiece, in which the welding quality can be increased. Furthermore, the positioning of the three-dimensional structure is to be improved, in particular a reduction of the distances of the individual three-dimensional structures from one another is achieved.
    The object of the invention is achieved in terms of the method in that, for stabilizing the arc, a laser beam with a maximum power of 2000 W, preferably a maximum of 400 to 700 W, is used, which laser beam is directed to that point on the surface of the workpiece at the the weld or structure is made, and the laser beam is activated before, during and / or after the ignition of the arc. The relatively low power laser can stabilize the arc without the use of an active gas and prevent the arc from jumping around the desired foot during the welding process. The use of the low energy laser 3 vaporizes the oxide layer on the surface of the workpiece and, moreover, pre-ionizes the air above the workpiece surface, thereby providing optimum conditions for the arc of the welding process. The supporting use of a laser is a simple measure for improving the welding results when welding workpieces, in particular made of titanium or titanium alloys. The supporting laser beam preheats the point at which the weld or structure is to be produced and reduces the contact resistance the weld or structure can be produced with higher quality. When fabricating three-dimensional structures in the form of individual pins, the base point of the pins is narrower, since the arc is stabilized and does not jump around, as a result of which the three-dimensional structures or pins can be arranged closer to the surface of the metallic workpiece. If the arc were to jump around on the surface and one wanted to place the three-dimensional structures as close together as possible, it could happen that the arc jumps uncontrollably onto an already set three-dimensional structure and destroys it. Therefore, so far the three-dimensional structures could be constructed with such difficult materials only with a relatively large distance, which is not advantageous because as many such three-dimensional structures are needed for a high strength or bonding force of a composite material to be bonded.
    Advantageously, the laser beam is activated as a function of a value of a welding parameter, in particular as a function of an increase in the welding current. Thus, stabilization of the arc can be synchronized with the activation of the arc.
    If the laser beam is activated before the arc is ignited, the arc ignition may be assisted as the workpiece surface is preheated by the laser and cleaned by removing any oxide layers.
    Optimal results can be achieved if the laser is already activated for a predetermined period of time before the arc is ignited, preferably 30 ms to 60 ms before the arc is ignited, and during the ignition of the arc. Such a leading laser exposure is particularly advantageous in contactless Zungenung the arc for workpieces made of galvanized steel, aluminum or the like. Thus, a preheating and pre-ionization is created, whereby the arc is stabilized very quickly after ignition.
    In producing three-dimensional structures on the surface of the workpiece, the laser beam may be directed and activated on the welding wire in addition to assisting in severing the welding wire at a predetermined height from the surface of the workpiece. The setting of the height of the separation of the welding wire in the prior art without laser beam exposure is defined above all over the duration of the acooling phase after attaching the welding wire to the surface of the workpiece, the final temperature reached at the end of the acooling phase being decisive. This results in geometry and material-dependent maximum and minimum heights. By targeted positioning of the laser beam on the welding wire at the desired height additional heat can be introduced into the welding wire and the separation of the welding wire at the desired height can be set independently. In this way, three-dimensional structures, in particular pins, with a desired height can be produced in optimum quality. In assisting in the severing of the welding wire, the welding torch remains unchanged in position, whereas the direction of the laser beam is changed, i. the laser beam is deflected from the surface of the workpiece onto the welding wire.
    The object of the invention is also achieved by an above-mentioned method for producing a three-dimensional structure on a surface of a metallic workpiece by means of a welding process, wherein a laser beam with a power of at most 2000 W, preferably 400 to 700 W, is used, which laser beam for Assisting the separation of the welding wire at a predetermined height from the surface of the workpiece at the predetermined height to the surface of the workpiece is directed and activated on the welding wire. 5
    According to a feature of the invention, for severing the welding wire, while the laser beam is directed and activated at the predetermined height from the surface of the workpiece onto the welding wire, the arc is extinguished or the current source is deactivated. As a result, an exact separation of the welding wire at the defined height can be achieved.
    Advantageously, the point of impact or focal point of the laser beam can be adjusted. The adjustment can be done manually, for example, with appropriate screws, or automatically using appropriate drives. The adjustment can also be integrated in the processing optics of the laser.
    As a welding process, in particular a so-called CMT (cold metal transfer) welding process with a forward / backward movement of the welding wire, which is characterized by particularly low heat input is suitable. Such a welding method is also applicable to particularly thin workpieces in a suitable manner, since hardly any distortion occurs on the workpiece due to the low heat input into the workpiece.
    As a laser beam, in particular, an infrared laser beam is suitable.
    Although the use of active gases is inadmissible for workpieces, in particular made of titanium or a titanium alloy due to the problems described above, protective gases can be used to improve the welding results, with noble gases, especially argon, are particularly suitable.
    The object according to the invention is also achieved by an abovementioned device for producing a weld or a three-dimensional structure on a surface of a metallic workpiece, preferably of titanium or a titanium alloy, in which a laser is used to stabilize the arc for emitting a laser beam with a maximum power 2000 W, preferably at most 400 to 700 W, having a point of impact at the point on the surface of the workpiece at which the weld or structure is made, which laser is connected to a device for controlling the laser, which control device for activation of the laser beam is formed before, during and / or after the ignition of the arc. For the achievable advantages, reference is made to the above description of the method for producing a weld or a three-dimensional structure on a surface of a metallic workpiece.
    Advantageously, the control device of the laser for activating the laser is formed before the ignition of the arc, preferably in a period of 30 ms to 60 ms before the ignition of the arc, and during the ignition of the arc.
    In order to optimally adjust the point of impingement or focal point of the laser beam, a device for adjusting the point of impact of the laser beam is preferably provided. As already mentioned above, this adjusting device can be formed by mechanical elements, such as adjusting screws or electromechanical elements, such as corresponding actuators.
    When means for adjusting the point of incidence of the laser beam in a direction normal to the surface of the workpiece is provided, assistance in separating the welding wire at a desired height from the surface of the workpiece may be made.
    Such an adjusting device can be formed by a controlled deflecting mirror, which is arranged in front of the laser. Instead of a deflection mirror, a moving lens, a prism or the like can be used.
    As already mentioned above, the laser is preferably an infrared laser for emitting an infrared laser beam.
    In order to be able to further improve the welding result, the welding torch can be connected to a line for supplying argon as protective gas. - 7 - 7
    • · · ♦
    Finally, an embodiment is advantageous in which the current source for the energization of the welding wire is deactivated for separating the welding wire, and the laser beam is focused at a predetermined height from the surface of the workpiece to the welding wire, as a result, a separation of the welding wire can be achieved exactly at the defined height.
    The present invention will be explained in more detail with reference to the accompanying schematic drawings. Show:
    Fig. 1 is a schematic representation of a welding device; FIG. 2 shows an embodiment of an apparatus for producing a weld seam or a three-dimensional structure on a surface of a metallic workpiece; FIG.
    3a to 3d schematically show time profiles of a method for producing a three-dimensional structure on an upper surface of a metallic workpiece; and
    Fig. 4 shows schematically the production of a three-dimensional structure with a predetermined height at the surface of a metallic workpiece.
    In Fig. 1 is a welding device 1 for a variety of processes or procedures, such. MIG / MAG, TIG / TIG, electrode, double wire / tandem welding, plasma or soldering, etc. are shown.
    The welding device 1 comprises a power source 2 with a power unit 3 arranged therein, a control device 4 and other components and lines, not shown, such as a switching element, control valves, etc. The control device 4 is connected, for example, to a control valve which is in a supply line for a Shielding gas 5 is arranged between a gas reservoir 6 and a welding torch 7.
    In addition, via the control device 4, a device 8 for conveying a welding wire 9 from a storage drum 10
    • 99 9 «99« 9 9 «9 9 · l · * • 9 99 · Ml 9 9 * · Μ · 9 * * 99 · · · * · ♦ · ♦ · 9 · 9 * 9 ·· or a wire roll be driven in the range of the welding torch 7, as is customary for MIG / MAG welding, for example. Of course, the conveyor device 8 in the welding device 1, in particular in the housing 11 of the power source 2, integrated and not, as shown in Fig. 1, be positioned as an additional device on a carriage 12. The conveyor 8 for the welding wire 9 can also be placed directly on the welding device 1, wherein the housing 11 of the power source 2 is formed at the top for receiving the conveyor 8, and the carriage 12 can be omitted.
    The welding wire 9 can also be supplied to the processing station outside the welding torch 7 by a conveying device 8, wherein a non-consumable electrode is preferably arranged in the welding torch 7, as is usual in TIG / TIG welding.
    The current for forming an arc 13 between the welding wire 9 and a workpiece 14 formed of one or more parts is supplied to the welding torch 7 via a welding line (not shown) from the power part 3 of the power source 2. The workpiece 14 is connected via a further welding line (not shown) for the further potential, in particular a ground cable, to the power source 2, which can be constructed via the arc 13, a circuit for a process.
    For cooling the welding torch 7, this is connected via a cooling device 15 with the interposition of any components, such as a flow monitor, with a liquid container, in particular a water tank 16 with a level indicator 17. When starting the welding torch 7, the cooling device 15, in particular a pump used for the liquid disposed in the liquid container 16 liquid pump, started, whereby a cooling of the welding torch 7 is effected. As shown in the illustrated embodiment, the cooling device 15 is positioned on the carriage 12, on which then the power source 2 is placed. The individual components of the welding device 1, ie the power source 2, the wire feed device 8 and the cooling device 15, are ·· t * ««
    In this case, they are designed such that they have corresponding projections or recesses, so that they can be stacked on one another or placed on top of each other.
    The welding device 1, in particular the power source 2, further has an input and / or output device 18, via which the most varied welding parameters, operating modes or welding programs of the welding device 1 can be set or called up and displayed. The welding parameters, operating modes or welding programs set via the input and / or output device 18 are forwarded to the control device 4, and then the individual components of the welding device 1 are controlled or corresponding setpoint values for the control or regulation are specified by the latter. When using a corresponding welding torch 7 also adjustment operations can be made via the welding torch 7, to which the welding torch 7 is equipped with a welding torch input and / or output device 19. In this case, the welding torch 7 is preferably connected to the welding device 1, in particular the current source 2 or the conveying device 8, via a data bus, in particular a serial data bus. To start the welding process, the welding torch 7 usually has a start switch (not shown), by the actuation of which the arc 13 can be ignited. In order to be protected against the radiant heat emanating from the arc 13, the welding torch 7 can be equipped with a heat shield 20.
    In the illustrated embodiment, the welding torch 7 is connected via a hose package 21 with the welding device 1, wherein the hose package 21 may be attached via a bend protection 22 on the welding torch 7. In the hose assembly 21, the individual lines, such as the supply line, lines for the welding wire 9, the protective gas 5, the cooling circuit, the data transmission, etc., arranged by the welding device 1 to the welding torch 7, whereas the ground cable preferably separately at the Power source 2 is connected. The hose package 21 is preferably connected to the power source 2 or the conveying device 8 via a coupling device, not shown, whereas the individual lines are secured in the hose package 21 with bend protection on or in the welding torch 7. In order to ensure a corresponding strain relief of the hose assembly 21 , The hose package 21 may be connected via a strain relief device to the housing 11 of the power source 2 or the conveyor device 8 (not shown).
    In principle, not all of the previously named components must be used or used for the different welding methods or welding devices 1. The welding torch 7 can also be designed as an air-cooled welding torch 7 and the cooling device 15 is omitted. The welding device 1 is formed at least by the power source 2, the conveying device 8 and possibly the cooling device 15, wherein these components can also be arranged in a common housing 11. There may be other parts or components, such as a grinding contactor 23 on the wire feeder 8 or an option carrier 24 on a holding device 25 for the gas storage 6, etc., are arranged.
    The embodiment of a welding device 1 illustrated in FIG. 1 represents only one of many possibilities. In particular, the welding devices 1 can be used with regard to the supply of the welding wire 9, the length of the hose assembly 21, the type, position and number of conveying devices 8 for the welding wire 9, the presence of a wire buffer {not shown) and much more.
    2 shows one embodiment of an apparatus for producing a weld or a three-dimensional structure 26 on a surface of a metallic workpiece 14. Accordingly, a welding torch 7 is provided for carrying out the welding process, which is connected to a control device 4. In the welding torch 7, a welding wire 9 is guided and an arc 13 is ignited between the welding wire 9 and the workpiece 14. To stabilize the arc 13 according to the invention a laser 27 'for emitting a laser beam 27 with a maximum power of 2000 W, preferably a maximum of 400 to 700 W, arranged, with a point of incidence of the laser beam 27 at that point on the surface of the workpiece
    14, at which the weld or structure 26 is to be produced. Accordingly, the arc 13 is directed to this point of impact. The laser 27 'is connected to a device 28 for controlling the laser 27', which is designed to activate the laser beam 27 before, during and / or after the ignition of the electric arc 13. Accordingly, the control device 28 of the laser 27 'is connected to the control device 4 of the welding torch 7 or of the welding device 1. For adjusting the point of impact or focal point of the laser beam 27, a corresponding adjusting device 29 may be provided. This adjusting device 29 may be formed by appropriate screws or actuators (not shown). According to the invention, the activation of the laser beam 27 with low power stabilizes the arc 13, as a result of which good welding results can be achieved even with workpieces 14 preferably made of titanium or titanium alloys. In particular, when manufacturing three-dimensional structures 26 on the surface of the workpieces 14, for example for the connection of a workpiece 14 made of titanium or a titanium alloy with carbon fiber composite materials good results and optimal connections of the three-dimensional structures 26 can be achieved with the workpiece 14.
    FIGS. 3a to 3d schematically show time profiles of a method for producing a three-dimensional structure 26 on a surface of a metallic workpiece 14. FIG. 3a shows, in principle, the production of a three-dimensional structure 26 on the surface of a metallic workpiece 14. Under the schematic basic diagram the position of the welding wire 9 is shown in Fig. 3a, the time course of the welding current Iw. In order to ignite the arc 13, the welding wire 9 is moved in the direction of the surface of the workpiece 14 and, after the contacting of the welding wire 9 with the surface of the workpiece 14, it is again moved away from the workpiece 14. During a phase of increased welding current I "the arc 13 is ignited (time tj. Thereafter, with a corresponding welding method, in particular a cold metal -trans-fer welding process, in particular by defined increase of the welding current Iw, the tip of the welding wire 9 is melted and connected to the workpiece 14. - 12
    To separate the welding wire 9, the welding wire 9 is in turn heated after a possible cooling phase, for example, by a corresponding current flow through the welding wire 9. This forms in a certain area above the base of the fused by the welding on the workpiece surface 9 or pins, a heat point out. Now, if the welding wire 9 and / or the welding torch 7 is conveyed back or moved, the welding wire 9 can be separated at this point. By returning the welding wire 9 and corresponding control of the welding parameters, in particular the welding current Iw and the wire feed speed v, the welding wire 9 can be cut off at a specific height Δχ, thereby producing a three-dimensional structure 26 in the form of a pin. However, this heat location can not be exactly defined, which is why certain deviations in the height of the three-dimensional structures 26 produced can result.
    In Fig. 3b, the inventive method according to which the laser beam 27 is used to support the ignition of the arc 13 is shown. Accordingly, before the ignition of the arc 13 at time tz, the laser beam 27 is activated and thereby the ignition of the arc 13 is supported. Preferably, the laser beam 27 is activated substantially together with the wire feed. That is, with the start of the forward movement of the welding wire 9, the laser beam 27 is activated. Thus, the laser beam 27 and the wire feed are synchronized accordingly. By pre-ionizing the air above the workpiece 14 by the laser beam 27, a contactless ignition of the arc 13 can be achieved. The positive influence of the laser beam 27 on the pre-ionization could be clearly shown with high-speed images of the welding process, so that the arc 13 is burned or fired precisely in that area which is pre-ionized by the laser beam 27. Accordingly, the laser beam 27 is deactivated after the ignition of the arc 13. The detection of the arc 13 takes place for example via the measurement of the voltage of the arc 13 and / or via the short-circuit detection. In the short circuit, the current increases accordingly, whereby the laser beam 27 is deactivated via this state change. Likewise, in the case of a short circuit, the voltage is zero, during or after the ignition of the arc 13, the voltage increases, so that by monitoring the voltage of the arc 13, the ignition can be easily detected.
    FIG. 3c shows the method according to the invention, according to which the laser beam 27 is activated for a period of time Δt before the ignition of the arc 13 and during the ignited arc 13, and thus the stability of the arc 13 can be increased. The laser beam 27 can be activated as a function of the feed of the welding wire 9 and / or due to the short-circuit detection. In this case, the laser beam 27 is also active during the short circuit, wherein in this short circuit of the ignition phase no material transfer takes place. For this purpose, the laser beam 27 is preferably directed laterally to the foot of the structure so that it acts as possible in the transition region from the structure to the workpiece 14. The period of time At which the laser beam 27 is activated before the ignition of the arc 13 is preferably 30 ms to 60 ms. Accordingly, the laser beam 27 is deactivated with the next following short circuit with material transition. The laser 27 'can be activated with each re-ignition of the arc 13, so that a corresponding stabilization of the arc 13 is ensured.
    A further variant of the method according to the invention is shown in FIG. 3d, wherein the laser beam 27 is adjusted in a direction normal to the surface of the workpiece 14 so that the impact position of the laser beam 27 impinges on the welding wire 9 at a predetermined height .DELTA.χ from the surface of the workpiece 14 , By the heat input into the welding wire 9 at the predetermined height Δχ from the surface of the workpiece 14, the tearing or cutting off of the welding wire 9 during the backward movement of the welding wire 9 is supported at this desired height Δχ and thus three-dimensional structures 26 with a predetermined height Δχ can be supported getting produced. To disconnect the current for this phase is increased accordingly, so that the laser beam 27 is activated with the increase in current and the current reduction is deactivated again. After a corresponding cooling time, the laser 27 'then again to stabilize the
    Arc 13 are activated. In contrast to the prior art according to FIG. 3 a, the support at which the welding wire 9 is to be separated can be set exactly by the support of the laser 27 '. When the laser beam 27 is focused at the desired height Δχ from the surface of the workpiece 14 onto the welding wire 9, heating takes place at the point of impact, whereby the heat spot formed by the flow of current through the welding wire 9 exactly at the desired location formed.
    4 shows an embodiment of an apparatus for carrying out the method last described in connection with FIG. 3d for producing three-dimensional structures 26 in the form of pins having a predetermined height Δχ. For adjusting the laser beam 27 in a direction normal to the surface of the workpiece 14, a corresponding adjusting device 30 is arranged. This can be formed by a controlled deflection mirror 31. About the deflection mirror 31, the laser beam 27 is deflected and directed to the desired location on the welding wire 9 and there introduced appropriate heat. During the backward movement of the welding wire 9, the welding wire 9 is torn off or cut off at the desired location, resulting in a pin with the desired height Δχ. In this way, a plurality of pins can be made on the surface of a workpiece 14, which can serve for example for connecting the metallic workpiece 14 with CFRP composite materials in aircraft technology or shipbuilding.
    Also, upon alignment of the laser beam 27 with the welding wire 9, the power supply via the power source 2 may be interrupted, i. the current source 2 deactivated or the arc 13 are deleted and the welding wire 9 are separated by the laser beam 27 in the predetermined height .DELTA.χ.
    It is essential in the solution according to the invention that the laser beam 27 ionizes a defined area on the workpiece 14 and optionally heats it so that the arc 13 is ignited precisely in this area and also burns within this area. Thus, an exact positioning of the light
    achieved bow 13, which does not roam on the surface of the workpiece 14, as is the case in the prior art without ionization and heating. By this so-called "constricting" of the arc 13, three-dimensional structures 26 or pins can be placed very close to one another, since the arc 13 no longer has the tendency to wander on the surface of the workpiece 14. If the arc 13 wandered about, as is the case in the prior art, then the three-dimensional structures 26 or pins would have to be positioned at a sufficient distance from one another, so that the arc roaming 13 can not hit the adjacent structures 26 or pins , If the arc 13 impinged on an already set pin, this pin would be destroyed because it would be melted due to the action of heat from the arc 13. Thus, it must be ensured that the arc 13 always burns on the desired location on the surface of the workpiece 14 and can not skip over to another already set pin. For this purpose, the intensity of the laser beam 27 for the ionization and heating can be adjusted according to the material used. Also, with very close proximity pins, the laser power can be increased to create a very narrow highly ionized area.
    权利要求:
    Claims (19)
    [1]
    Claims 1. A method for producing a weld or a three-dimensional structure (26) on a surface of a metallic workpiece (14), preferably titanium or a titanium alloy, by means of a welding process, between one in a welding torch (7) Welding wire (9) and the workpiece (14) an arc (13) is ignited, and with the welding wire (9) the weld or structure (26) is produced, characterized in that for stabilizing the arc (13) a laser beam (27 ) with a maximum power of 2000 W, which laser beam (27) is directed to the location on the surface of the workpiece (14) at which the weld or structure (26) is made, and the laser beam (27), during and / or after the ignition of the arc (13) is activated.
    [2]
    2. The method according to claim 1, characterized in that the laser beam (27) in response to a value of a welding parameter, in particular in response to an increase in the welding current (Iw) / is activated.
    [3]
    3. The method according to claim 1 or 2, characterized in that the laser beam (27) is activated before the ignition of the arc (13).
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the laser beam (27) for a predetermined period of time (At) before the ignition of the arc (13), preferably 30ms to 60ms before the ignition of the arc (13), and during the ignition of the arc (13) is activated.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that to assist the separation of the welding wire (9) of the laser beam (27) at a predetermined height (Ax) from the surface of the workpiece (14) on the welding wire (9). is directed and activated.
    [6]
    6. Method for producing a three-dimensional structure

    (26) on a surface of a metallic workpiece (14) by means of a welding process, wherein between a in a welding torch (7) guided welding wire (9) and the workpiece (14) an arc (13) is ignited, and with the welding wire ( 9) the structure (26) is produced, characterized in that a laser beam (27) with a maximum power of 2000 W is used, which laser beam (27) supports the separation of the welding wire (9) at a predetermined height (Δχ) is directed and activated from the surface of the workpiece (14) at the predetermined height (Δχ) to the surface of the workpiece (14) on the welding wire (9).
    [7]
    7. The method according to claim 5 or 6, characterized in that for separating the welding wire (9) during the laser beam (27) in the predetermined height (Δχ) from the surface of the workpiece (14) directed to the welding wire (9) and activated is, the arc (13) is deleted.
    [8]
    8. The method according to any one of claims 1 to 7, characterized in that the point of impact of the laser beam (27) is adjusted.
    [9]
    9. The method according to any one of claims 1 to 8, characterized in that a CMT (cold metal transfer) welding process with a forward / backward movement of the welding wire (9) is used as the welding process.
    [10]
    10. The method according to any one of claims 1 to 9, characterized in that an infrared laser beam is used as the laser beam (27).
    [11]
    11. The method according to any one of claims 1 to 10, characterized in that argon is used as protective gas (5).
    [12]
    12. Device (1) for producing a weld or a three-dimensional structure (26) on a surface of a metallic workpiece (14), preferably of titanium or a titanium alloy, by means of a welding torch (7) for carrying out a welding process with a welding torch. 18 - 18



    (7) guided welding wire (9), wherein between the welding wire (9) and the workpiece (14) an arc (13) ignited Μ • characterized in that for stabilizing the arc (13) a laser (27 ') is arranged to emit a laser beam (27) with a maximum power of 2000 W, with a point of impact at that location on the surface of the workpiece (14). at which the weld or structure (26) is made, which laser (27 ') is connected to means (28) for controlling the laser (27), which control means (28) for activating the laser beam (27) before, during and / or formed after the ignition of the arc (13).
    [13]
    13. Device (1) according to claim 12, characterized in that the control device (28) for activating the laser beam (27) before the ignition of the arc (13), preferably in a period of time (Et) of 30ms to 60ms before the ignition of Arc (13), and during the ignition of the arc (13) is formed.
    [14]
    14. Device (1) according to claim 12 or 13, characterized in that a device (29) for adjusting the point of impact of the laser beam (27) is provided.
    [15]
    15. Device (1) according to any one of claims 12 to 14, characterized in that means (30) for adjusting the point of incidence of the laser beam (27) in a direction normal to the surface of the workpiece (14) is provided.
    [16]
    16. Device (1) according to claim 15, characterized in that the adjusting device (30) by a controlled deflecting mirror (31) is formed.
    [17]
    17. Device (1) according to any one of claims 12 to 16, characterized in that as the laser (27 ') an infrared laser for emitting an infrared laser beam is provided.
    [18]
    18. Device (1) according to any one of claims 12 to 17, characterized in that the welding torch (7) is connected to a line (32) for supplying argon as inert gas (5). - 19 * 14 44 · 4 • · · 4 • • • • • • • • 4 • * 4 ·· * 4
    [19]
    19. Device (1) according to one of claims 15 to 18, characterized in that for separating the welding wire (9) at a predetermined height (Δχ), while the laser beam (27) at a predetermined height {Δχ) from the surface of the Workpiece (14) is directed to the welding wire (9) and activated, a current source to form the arc (13) is deactivated.
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    同族专利:
    公开号 | 公开日
    US20130105450A1|2013-05-02|
    DE102012218487B4|2015-09-10|
    DE102012218487A1|2013-05-02|
    US9149885B2|2015-10-06|
    AT512081B1|2013-08-15|
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    法律状态:
    2019-06-15| MM01| Lapse because of not paying annual fees|Effective date: 20181028 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1592/2011A|AT512081B1|2011-10-28|2011-10-28|METHOD AND DEVICE FOR PRODUCING A WELDING SEAM OR A THREE-DIMENSIONAL STRUCTURE ON THE SURFACE OF A METALLIC WORKPIECE|ATA1592/2011A| AT512081B1|2011-10-28|2011-10-28|METHOD AND DEVICE FOR PRODUCING A WELDING SEAM OR A THREE-DIMENSIONAL STRUCTURE ON THE SURFACE OF A METALLIC WORKPIECE|
    DE102012218487.2A| DE102012218487B4|2011-10-28|2012-10-10|Method and device for producing a three-dimensional structure on the surface of a metallic workpiece|
    US13/655,654| US9149885B2|2011-10-28|2012-10-19|Method and apparatus for the production of a welding seam or a three-dimensional structure on a surface of a metallic work piece|
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