WO2014013322A2 - Méthode et système pour démarrer et arrêter un système à fil chaud - Google Patents

Méthode et système pour démarrer et arrêter un système à fil chaud Download PDF

Info

Publication number
WO2014013322A2
WO2014013322A2 PCT/IB2013/001568 IB2013001568W WO2014013322A2 WO 2014013322 A2 WO2014013322 A2 WO 2014013322A2 IB 2013001568 W IB2013001568 W IB 2013001568W WO 2014013322 A2 WO2014013322 A2 WO 2014013322A2
Authority
WO
WIPO (PCT)
Prior art keywords
wire
arc
workpiece
molten puddle
puddle
Prior art date
Application number
PCT/IB2013/001568
Other languages
English (en)
Other versions
WO2014013322A3 (fr
Inventor
Steven R. Peters
Paul Edward Denney
Michael D. LATESSA
Original Assignee
Lincoln Global, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US13/554,255 external-priority patent/US20130020289A1/en
Application filed by Lincoln Global, Inc. filed Critical Lincoln Global, Inc.
Priority to DE112013003613.4T priority Critical patent/DE112013003613T5/de
Priority to CN201380049254.6A priority patent/CN104661781A/zh
Priority to BR112015001243A priority patent/BR112015001243A2/pt
Priority to JP2015522184A priority patent/JP2015522426A/ja
Priority to KR20157003299A priority patent/KR20150038016A/ko
Publication of WO2014013322A2 publication Critical patent/WO2014013322A2/fr
Publication of WO2014013322A3 publication Critical patent/WO2014013322A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1093—Consumable electrode or filler wire preheat circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/211—Bonding by welding with interposition of special material to facilitate connection of the parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
    • B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
    • B23K28/02—Combined welding or cutting procedures or apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • B23K9/124—Circuits or methods for feeding welding wire

Definitions

  • the invention is related to a method of starting a hot wire process according to claim 1 , to a hot wire system according to claim 11 and 14 and to a method of stopping a hot wire process according to claim 15.
  • the subject invention generally relates to systems and methods for starting and/or stopping a hot wire process used, for example, in overlaying, welding and/or other joining applications. More particularly, certain embodiments relate to systems and methods to start and/or stop a hot wire process using a controlled filler wire feeder and energy source system in combination with a high intensity energy source for any one of overlaying, joining and welding applications.
  • a high intensity energy source such as for example, a laser, non-consumable tungsten electrode, or other high energy arc or plasma process is used to heat and melt a workpiece to form a molten puddle.
  • a filler wire is advanced towards a workpiece and the molten puddle.
  • the wire is resistance-heated by a separate energy source such that the wire approaches or reaches its melting point and contacts the molten puddle.
  • the heated wire is fed into the molten puddle for carrying out the hot wire process. Accordingly, transfer of the filler wire to the workpiece occurs by simply melting the filler wire into the molten puddle.
  • the filler wire may be solid as the wire enters the molten puddle.
  • 30% of the filler wire can be solid as the filler wire enters the molten puddle.
  • the filler wire is pre-heated to at or near its melting point, its presence in the molten puddle will not appreciably cool or solidify the puddle and is quickly consumed into the molten puddle.
  • One problem with initiating or stopping the hot wire process is the occurrence of wire spatter when respectively introducing or retracting the wire from the molten puddle. Prior to its complete formation, the molten puddle is unstable which results in wire spatter upon introduction of the wire into the molten pud- die.
  • the instability in the puddle at wire introduction can be seen in a voltage, current or power trace of the hot wire process, illustrated in FIG. 7.
  • Shown in FIG. 7 are oscillations in the voltage/current/power trace at the beginning of a known hot wire process.
  • the oscillations in the voltage trace are due, at least in part, to repeated arcing events between the wire and the workpiece due to the incomplete formation of the molten puddle.
  • the wire is maintained in the molten puddle to avoid wire spatter, but in order to separate the wire from the puddle, the hot wire process must be stopped and the wire cut. Accordingly, there is a need for starting and/or stopping a hot wire process that minimizes wire spatter when introducing or retracting the wire from the molten puddle.
  • Embodiments of the present invention comprise a system and method to start and stop a combination filler wire feeder and energy source system.
  • a first embodiment of the present invention provides a method of a hot wire process between a filler wire and a workpiece.
  • the subject method has an initiating process including establishing an arc between the wire and the workpiece so as to form a molten puddle in the workpiece; maintaining the molten puddle with a high intensity energy source separate of the wire; advancing the wire into the molten puddle upon establishing the arc voltage and applying a heating current to the wire so as to terminate the arc and bring the wire to approximately its melting point for the hot wire process.
  • the sensing signal is an open circuit voltage of at least 3 volts.
  • the high intensity energy source is an arc generation source.
  • a hot wire system comprising a feeder for advancing and retracting a distal end of a filler wire with respect to a workpiece.
  • the system further comprises a power supply for applying to said wire: a sensing signal, an arc generation current, and a heating current.
  • the system further comprises a controller coupled to the feeder and the power supply for initiating a hot wire process.
  • the controller locates the wire relative to said workpiece and regulates each of the sensing signal.
  • the arc generation signal and the heating current includes: advancing the distal end of the wire toward the workpiece and regulating the sensing signal so as to determine when the distal end is in contact with said workpiece.
  • the system further comprises retracting the distal end of the wire from the workpiece and regulating the arc generation current so as to form an arc between the distal end and the workpiece to form a molten puddle.
  • the system further comprises advancing the wire into the molten puddle and regulating the heating current so as to melt the wire into the molten puddle.
  • the system further comprises a high intensity energy source to provide heat to the molten puddle.
  • the power supply comprises a plurality of power sources including a first power source for applying the sensing signal, a second power source for applying the arc generation current and a third power source for applying the heating current.
  • Another embodiment provides method of stopping a hot wire process having a heating current to a wire melting a wire into a molten puddle of a workpiece.
  • the stopping method includes reducing a feed rate of the wire into the molten puddle and maintaining the molten puddle with a high intensity energy source.
  • the stopping method further includes in one aspect: stopping the heating current and applying current pulses to the wire such that the distal end of said wire is removed from the molten puddle.
  • Another or alternative aspect of the stopping method includes retracting the wire from the molten puddle, sensing formation of an arc between the wire and the workpiece, and terminating the heating current to the wire prior to said arc being formed.
  • the wire is retracted from the molten puddle with at least some of said heating current applied to the wire such that the wire breaks and separates from the molten puddle so as to leave a wire extension in said molten puddle.
  • Energy from the high intensity energy source is applied to the wire extension so as to melt the extension into the molten puddle.
  • FIG. 1 illustrates a functional schematic block diagram of an exemplary embodiment of a hot wire system
  • FIG. 1 A is a perspective detailed view of a hot wire process using the system of FIG. 1 ;
  • FIG. 2 illustrates a flow chart of a first embodiment of a start-up method to a hot wire process using the system of FIG. 1 ;
  • FIG. 3 illustrates a flow chart of a second embodiment of a start-up method to a hot wire process using the system of FIG. 1 ;
  • FIG. 4 illustrates a flow chart of a first embodiment of a stop method to a hot wire process using the system of FIG. 1 ;
  • FIG. 5 illustrates a flow chart of a second embodiment of a stop method to a hot wire process using the system of FIG. 1.
  • FIG. 6 illustrates a flow chart of a third embodiment of a stop method to a hot wire process using the system of FIG. 1.
  • FIG. 7 illustrates of a trace of voltage, current and power in a prior art hot wire process.
  • FIG. 1 illustrates a functional schematic block diagram of an exemplary embodiment of a system 100 for performing a hot wire process.
  • the term "hot wire process” is used herein in a broad manner and may refer to any applications including overlaying, welding or joining. More particularly, a hot wire process includes heating a filler wire (for example using resistance heating) to perform an overlaying, welding and/or joining process. Overlaying processes may include: brazing, cladding, building up, filling, and hard- facing. For example, in a "brazing” application, a filler metal is distributed between closely fitting surfaces of a joint via capillary action. Whereas, in a "braze welding” application of the filler metal is made to flow into a gap.
  • the system 100 includes a hot filler wire feeder subsystem capable of providing at least one heated filler wire 140 to make contact with the workpiece 115.
  • a hot filler wire feeder subsystem capable of providing at least one heated filler wire 140 to make contact with the workpiece 115.
  • a molten puddle 116 formed in the workpiece is considered part of the workpiece 115, thus reference to contact with the workpiece 115 includes contact with the puddle to the extent any puddle is present.
  • the hot filler wire feeder subsystem includes a filler wire feeder 150, a contact tube 160, and a hot wire power supply 170.
  • the wire 140 is fed from the filler wire feeder 150 through the contact tube 160 toward the workpiece 115 and extends beyond the tube 160.
  • the hot wire power supply 170 may be a pulsed direct current (DC) power supply, although alternating current (AC) or other types of power supplies are possible as well. Accordingly, the power supply 170 may be operated to apply any one of a voltage or current signal to the wire 140. Although the power supply 170 may include a single power source or more than one power source to apply the various currents or establish the various voltages described in greater detail below.
  • wire 140 this is generally intended to mea a consumable which can be either a traditionally cylindrically shaped wire (which can be solid or cored) or it can also be a strip consumable such as the type often used for cladding. However, for clarity the consumable 140 will be herein referenced to as a "wire.”
  • the power supply 170 is operated to apply a sensing signal to the wire 140 to deter- mine the proximity of the wire to the workpiece.
  • the power supply applies a current to the wire which is sufficient to establish an arc between the wire and the workpiece.
  • the filler wire 140 is resistance- heated by electrical current from the hot wire power supply 170 which is operatively connected between the contact tube 160 and the workpiece 115.
  • the exemplary system 100 further includes a control subsystem 195 which is capable of measuring a potential difference (i.e., a voltage V) between, and a current (I) through, the workpiece 115 and the hot wire 140.
  • the control subsystem 195 which may be embodied as a state based current sensing controller, is operatively connected to the workpiece 115, the contact tube 160 and the hot wire power supply 170, so as to regulate functions of the power supply such as for example, output current, voltage and/or power.
  • the control subsystem 195 may include secondary or parallel controllers to regulate or monitor other aspects of the system and or hot wire process, such as for example, a laser subsystem, wire or puddle as described in greater detail below.
  • the sensing and current control subsystem 195 is capable of sensing when the resistive filler wire 140 is in contact with the workpiece 115.
  • controller subsystem 195 via its connection to the hot wire power supply 170 is capable of controlling the flow of current through the resistive filler wire 140 in response to the sensing, as is described in more detail below with one or more aspects of the subject startup/stopping methods.
  • the system 100 further includes a laser subsystem capable of focusing a laser beam 110 onto a workpiece 115 to heat the workpiece 115 in order to, for example, maintain the molten puddle at the work- piece.
  • the laser subsystem includes a laser device 120 and a laser power supply 130 operatively connected to each other.
  • the laser power supply 130 provides power to operate the laser device 120.
  • a controller such as for example, a second parallel state based controller, as a part of or separate from control subsystem 195, may be provided to regulate functions of the laser power supply 130 which may include, for example, output of cur- rent, voltage or power in real time individually or for synchronized operation with the hot wire power supply 170.
  • the laser subsystem can be any type of high energy laser source, including but not limited to carbon dioxide, Nd:YAG, Yb-disk, YB-fiber, fiber delivered or direct diode laser systems.
  • the laser subsystem is also more generally a high intensity energy source.
  • the high intensity energy source is described as a laser subsystem having a laser beam and power supply, it should be understood that any high intensity energy source may be used.
  • a high intensity energy source can provide at least 500 W/cm 2 .
  • a high intensity energy source may include at least one of an electron beam, a plasma arc welding subsystem, a gas tungsten arc welding subsystem, a gas metal arc welding subsystem, a flux cored arc welding subsystem, and a submerged arc welding subsystem serving as the high intensity energy source.
  • the laser beam 110 is sufficiently intense in its energy to melt some of the base metal of the workpiece 115 and/or melt the wire 140 onto the workpiece 115.
  • the laser beam 0 maintains the molten puddle in coordination with the conditions of the filler wire 140.
  • the power supply 170 is configured to provide a large portion of the energy needed to resistance-melt the filler wire 140 for carrying out the hot wire process.
  • the power supply 170 and the feeder subsystem are controlled and operated to initiate the hot wire process and more particularly initiate formation of the molten puddle in the workpiece 115.
  • the power supply 170 and the feeder subsystem are configured to terminate the hotwire process to provide for separation of the wire from the molten puddle.
  • the system 100 further includes a motion control subsystem capable of moving the laser beam 110 (energy source) and the resistive filler wire 140 in a same direction 125 along the workpiece 115 (at least in a relative sense) such that the laser beam 110 and the resistive filler wire 140 remain in a fixed relation to each other.
  • the relative motion between the workpiece 115 and the laser/wire combination may be achieved by moving the workpiece 115 or by moving the laser device 120 and the hot wire feeder subsystem.
  • the motion control subsystem includes a motion controller 180 operatively connected to a robot 190. The motion controller 180 controls the motion of the robot 190.
  • the robot 190 is operatively connected (e.g., mechanically secured) to the workpiece 115 to move the workpiece 115 in the direction 125 such that the laser beam 110 and the wire 140 effectively travel along the workpiece 115.
  • the motion controller 180 may further be operatively connected to the laser power supply 130 and/or the sensing and current controller 195. In this manner, the motion controller 180 and the laser power supply 130 may communicate with each other to coordinate activities between the various subsystems of the system 100.
  • Figure 1 depicts the heat source (laser) upstream of the hot wire - in the travel direction - embodiments of the present invention are not limited in this regard. Specifically, the hot wire can enter the puddle upstream of the heat source during the process.
  • embodiments of the invention are not limited to the use of a laser system.
  • a laser system can also use anyone of a non-consumable tungsten electrode or other high energy arc or plasma process can be used.
  • the laser power supply 130 and laser 120 can be replaced with a GMAW power supply and torch such that a MIG or GMAW process is used to create the molten puddle.
  • the MIG/GMAW process would be creating the molten puddle and the hot wire process would be implemented as disclosed and discussed herein.
  • the exemplary embodiments discussed below may refer to the laser subsystem, however, this is intended to be exemplary as the control, integration and operation of the system 100 described herein is similar regardless of the high power energy source creating the molten puddle.
  • FIG. 1A Shown in FIG. 1A is a detailed view of a hot wire process at the site of a molten puddle 116 on a workpiece 1 5. More specifically shown is a laser beam 110 maintaining the molten puddle 1 6 with the heated filler wire 40 located and advanced into the molten puddle 116.
  • a laser beam 110 maintaining the molten puddle 1 6 with the heated filler wire 40 located and advanced into the molten puddle 116.
  • one embodiment of method of starting a hot wire process provides for bringing the filler wire 140 into proximity of the workpiece 115 and forming an arc therebetween sufficient to melt the workpiece and form the molten puddle 116. With the molten puddle 116 in a stable formation, the current to the wire is reduced to a level sufficient to melt or nearly melt the wire, yet not sufficient to provide an arc between the wire and the workpiece.
  • the laser maintains the molten puddle formation and the wire is advanced into the molten puddle to complete the hot wire process.
  • the stable transfer of the wire material to the puddle 116 occurs by melting of the wire 40 directly into the process and more particularly not by a transfer by droplets of material from the wire to the puddle.
  • Stability of the molten puddle 116 may be determined by indirect methods which may include, for example, wire speed, voltage or current feedback. More specifically, at the start of the hot wire process the feeder 150 ramps up to a desired and known wire feed speed, from which may be determined the amount of wire fed into the puddle and size of the molten puddle 116. From the amount of wire fed into the molten puddle 116 and puddle size, one may determine a desired start point at which to begin the hot wire process. That is to say, a desired amount of wire has been added to the molten puddle 116 and the puddle size can be calculated based on all of the wire being melted into the puddle.
  • the puddle is ready for stable hot wire process.
  • feedback of the actual voltage and/or current output from the power supply can indicate stable puddle formation.
  • historic data or experience for elapsed time to puddle formation may be used.
  • the subject hot wire process is started with an arc between the wire 140 and workpiece 116 in order to form the molten puddle 117.
  • the hot wire process is initiated by employing a short arc transfer mode or technique between the wire and workpiece for puddle formation.
  • the stability of the particular shorting events, or the time in-between shorting events may provide an indication of stable puddle formation.
  • a stable molten puddle 116 may be realized where the arc between the wire 140 and workpiece 115 is great enough to cause a permanent change in the puddle profile (i.e. width, thickness, volume, etc.. ) of the puddle 116.
  • the "flash" of the micro arcs can cause ripples in the puddle that, if great enough, the ripples freeze into the puddle.
  • the arc intensity and/or heat input is so great that it can blow “frozen” material out of the puddle and the puddle is thinned. This particularized approach makes the hot wire start process independent of speed or other conditions.
  • the hot wire process and puddle formation may be initiated with a pulsed technique employing adaptive control, such as for example used in The Lincoln Electric Company's pulsed gas metal arc welding (GMAW-P) shown and de- scribed in Lincoln Electric Waveform Control Technology publication, NX-2.70 entitled: “Process: Pulsed Spray Metal Transfer” (Aug. 2004), which is incorporated by reference in its entirety.
  • the waveform of the adaptive control employed between the wire and the workpiece indicates ramped up and peak value voltage or the time at which voltage has stabilized or reached a desired value.
  • the count of the number of pulses or a desired current value can be determined which may indirectly indicate the wire feed speed and the point at which the puddle is stable for initiating the hot wire process.
  • FIG. 2 more specifically illustrates one embodiment of the start-up method
  • a sensing voltage is established by the power source 170; and in step 220, a distal end of the at least one filler wire 140 is advanced toward the workpiece 15 by the wire feeder 150.
  • the sensing voltage is an open circuit voltage (OCV) due to a sensing signal applied to the wire 140 by the wire power supply 170 under the command of the control subsystem 195.
  • OCV open circuit voltage
  • the sensing and current controller 195 may command the hot wire power supply 170 to establish a sensing voltage, such as for example, an open circuit sensing voltage in the range of 24 to 70 volts.
  • a smaller sensing voltage can be used.
  • the sensing voltage can be in the range of 3 to 15 volts.
  • the sensing voltage is in the range of 5 to 15 volts and in yet another embodiment, 5 to 8 volts.
  • the sensing voltage in one particular aspect or embodiment may be a function of the type of wire 140.
  • the sensing voltage for stainless wires may be set in a range of 6 to 9 volts. In higher nickel wires (with higher resistance), the sensing voltage may be set at or operate at slightly higher voltages; steel is slightly less.
  • a suitable sensing voltage outside the range of 5 to 15 volts may be employed, for example, where the wire 140 is a larger extruded wire having an outer coating that is not as conductive as the wire core. In such an instance, the sensing voltage can be as high as 20 volts.
  • the appropriate sensing voltage may define a threshold voltage above which there is an arc between the wire 140 and the workpiece 115 and below which the current may be reduced or cut off to get back to a "hot wire" condition or level.
  • the applied sensing signal does not provide enough energy to appreciably heat the wire 140.
  • An exemplary embodiment of a power source applying a sensing signal to a filler wire is shown and de- scribed in U.S. Patent Publication No. 2010/0176109 which is incorporated by reference in its entirety.
  • at least some heating can occur while the sensing signal/voltage is being applied.
  • the sensing or voltage signal is monitored such that changes in the voltage can be detected when contact between the wire 40 and the workpiece 115 is made.
  • the measured OCV will be above 3 volts.
  • a determination is made as to whether the distal end of the wire has made contact with the workpiece 115. Such sensing may be accomplished by the sensing and current controller 95 measuring or monitoring the change in the OCV as a potential difference between the filler wire 140 and the workpiece 115.
  • the start-up method provides for repeatedly applying a sensing voltage to the wire such that there is no current flow until the wire touches the work. More specifically, the power supply 170 is turned on at a sensing level and the actual voltage between the wire 140 and the workpiece 115 is monitored as the wire 140 is advanced toward to the workpiece 115.
  • the sensing voltage or signal is at a level such that when the wire does make contact, to the extent a current flows it is a sensing current only.
  • the monitored voltage goes to zero.
  • the voltage is monitored to determine if it drops below a contact threshold level.
  • the controller 195 can have a contact detection level of 1 volt, such that when the voltage drops below this threshold level, it is determined that contact has been made or is imminent - thus triggering further events described below.
  • step 230 may be employed in step 230 to determine contact between the wire 140 and the workpiece 115.
  • other contact indicators may include sensing a pushing resistance against the wire.
  • the retraction of the wire 140 can be to a predetermined distance or for a predetermined amount of time, at a set speed.
  • a current is provided to the wire. This current can be an arc creation current, or a current at a level less than an arc creation current.
  • the wire 140 begins retraction, and a gap forms between the wire 140 and the workpiece 115.
  • an arc creation current is provided to the wire 140 by the power supply 170. (It is noted that the arc creation current can be provided shortly before, at the same time, or shortly after, retraction of the wire is initated.) As the wire 140 is retracted away from the surface, the arc creation current creates an arc between the wire 140 and the workpiece/puddle.
  • the arc generation current ranges from about 5 amps to about 30 amps so as to provide for an arc-forming voltage between the wire 140 and the workpiece 115. In another exemplary embodiment, the current ranges in between 10 and 25 amps. In another aspect, the arc generation current is provided under a constant current control method between the controller 195 and the power supply 170. In such embodiments, an arc generation current level is predetermined and the power supply 170 maintains that current level until such time as an arc is established between the wire 140 and the workpiece 115.
  • the provided arc current may be provided using a GMAW short arc or a pulsed type welding processes.
  • the arc generation current can be applied immediately after the sensing signal is stopped such that the sensing signal transforms immediately to the arc generation signal.
  • a time gap between the stopping of the sensing signal and the arc generation signal can exist. While the arc generation current is being applied, the wire 140 is still being retracted until such time that an arc is created and detected.
  • the voltage between the wire 140 and the workpiece 5 is being monitored such that when the voltage reaches an arc generation level, the controller 195 determines that an arc has been created. Thus, when this arc detection voltage threshold is reached, it is determined that an arc has been created.
  • the arc detection voltage threshold has been reached - indicating the creation of the arc - the retraction of the wire 140 is stopped, the molten puddle starts to form, and the wire is re-advanced toward the workpiece 115. Then, the wire 140 can be advanced as a puddle starts to form and stabilize.
  • the duration of time between the detection of an arc and the re-advancement is in the range of 50 to 500 milliseconds. This advancement and arc control can be similar to the advancement and control used for GMAW short arc or pulsed type welding processes.
  • the arc is then maintained, while the wire 140 is advancing, for an amount of time sufficient to establish a molten puddle of sufficient size and stability.
  • the arc generation current is maintained for predetermined period of time after the arc is established. After the expiration of the time it is presumed that a molten puddle is created.
  • the predetermined time is no more than 300 milliseconds (ms), and in other exemplary embodiments the predetermined time is no more than 00 ms.
  • a second determination step 260 can be utilized which monitors the workpiece 1 5 for formation of the molten puddle 116.
  • the surface of the workpiece 115 is monitored to determine if a molten puddle is created and if the puddle reaches a sufficient size or stability level.
  • a high speed camera with electronic shuttering may be used to evaluate the width of the puddle. More specifically, high speed video can be used to observe changes in the puddle/deposit profile to determine puddle stability.
  • the molten puddle stability is determined by indirect methods.
  • the power source 130 monitors the current and/or voltage between the wire 140 and the workpiece 115 upon arc generation.
  • the voltage and the current fluctuates or oscillates until the puddle stabilizes.
  • puddle stability may be indicated by the stabilization of the current and the voltage or the substantial absence of such oscillations.
  • the puddle is monitored until it has been satisfactorily determined that a stable molten puddle has been formed, this embodiment of the start-up method 200 provides for maintaining the arc between the wire 114 and the workpiece 115.
  • the puddle monitoring methodology can be utilized in lieu of monitoring an arc generation voltage level, such that either methodology can be used on their own, or together to determine when a molten puddle has been sufficiently created.
  • the arc generation current is stopped and a heating current power is provided to the wire 140, as the wire 140 is advanced into the molten puddle 116.
  • the wire is advanced into the puddle at a desired wire feed speed. This occurs in the step 270.
  • a heating current is continuously applied to the wire 140 from power source 170 or a separate hot wire power source.
  • the heating current in one embodiment, is below an arc forming threshold level.
  • the wire heating current is below an arc forming threshold, such as for example, below 10-20 volts.
  • a high intensity heat source for example, laser beam 110 or GMAW arc
  • the beam 110 (or other heat source) can be provided to the puddle at varying times during the starting process.
  • the beam 110 can be turned on at the beginning of the starting process, or it can be turned on after contact has been detected, or it can be turned on after the arc has been created, or it can be turned on after the arc generation current has been shut off.
  • a hot wire process 280 can be carried out, such as for example, the hot wire processes shown and described in U.S. Patent Publication No. 20 1/0297658 or U.S. Patent Publication No. 2010/0176109, each of which is incorporated by reference in its entirety.
  • the alternative method instead of determining the formation of a molten puddle in the second determining step, provides for determining whether the established arc between the filler wire 140 and the workpiece 115 has exceeded a threshold. More specifically, the alternate start-up method provides in an initial step 310 of establishing a sensing voltage in a manner previously described. In an advancing step 320, a distal end of the resistive filler wire 140 is advanced toward the workpiece 115, and in a first determination step 330, a determination is made as to whether the distal end of the wire has made contact with the workpiece 115.
  • the start-up method 300 provides for repeatedly establishing or maintaining and monitoring the voltage (e.g., an OCV) as the wire 140 is advanced toward to the workpiece 115.
  • the voltage e.g., an OCV
  • the wire 140 is retracted from the workpiece in a retraction step 340, the sensing voltage signal is stopped, and an arc generation current is applied to the wire 140.
  • an arc formation step 350 the wire 140 is continuously retracted from the workpiece 115 and the current is increased and/or applied until an arc is established between the wire 140 and the workpiece 115 for formation of a molten puddle.
  • the arc voltage between the filler wire 140 and the workpiece 115 is monitored and a determination is made as to whether the voltage exceeds a threshold value, such as for example, 10 - 20 volts, or more particularly exceeding 15 volts.
  • a threshold value such as for example, 10 - 20 volts, or more particularly exceeding 15 volts.
  • the threshold voltage can be a function of the wire type, material transfer mechanism, e.g. short arc or pulsed, and/or shielding gas being used.
  • 15 volts may define a threshold voltage.
  • 18- 25 volts may be appropriate.
  • the threshold voltage indicates the formation of a stable molten puddle 116 on the workpiece 115.
  • the threshold voltage may be of a magnitude under which an arc is known to be formed.
  • a hot wire process 280/380 can be carried out, such as for example, using any one of the hot wire processes shown and described in U.S. Patent Publication No. 201 /0297658 or U.S. Patent Publication No. 2010/0176109.
  • the heat of the initial arc is used to create the initial molten puddle and begin the laser (or arc), hot-wire process. It is also desirable throughout the hot wire process to minimize spatter and/or avoid fusing of the filler wire in the molten puddle. Accordingly, embodiments of the subject process include a method of stopping the hot wire process so that the wire can be removed from the molten puddle in a stable manner, e.g., without formation of an arc between the wire and work- piece. Generally, each of the embodiments of stopping the hot wire process provide for maintaining the molten puddle and heating the wire such that the distal end of the wire melts or "burns" out of contact with the molten puddle.
  • a current termination step 410 provides for terminating or turning off the heating current from the power supply to the wire 170.
  • the heating current may be turned off manually or alternatively automatically by the sensing and current control subsystem 195.
  • the wire feed rate to the molten puddle 116 is reduced in a feed rate reduction step 420. In one particular embodiment, the wire feed rate may be stopped.
  • the molten puddle is maintained in a maintenance step 430 of at least one embodiment of the subject stop process, in which the laser beam 110 is applied to the molten puddle so as to maintain its stability.
  • a pulsing step 440 of the subject method provides for applying a plurality of current pulses to the wire 140 to burn back or clear the wire 140 from the puddle.
  • the sensing and current control subsystem controls power supply 170 to apply the current pulse to the filler wire.
  • the current pulses are of a sufficient magnitude to transfer wire material into the molten puddle and more particularly clear a length of the wire from the molten puddle. Accordingly, the repetitive current pulses are sufficient to "burn back" the distal end of the wire out of the molten puddle.
  • the current pulses are of a current level that do not initiate an arc between the wire and the workpiece 115.
  • a voltage and/or current can be monitored during the pulse to ensure that the current stays below an arc generation level.
  • a single current pulse may be used, if the single current pulse has an appropriate rise time, duration, and current to bum the wire out of the molten puddle.
  • the current pulses are applied until the distal end of the wire 140 is out of the molten puddle, and sufficiently cleared from the puddle 116.
  • the subject stop method 400 includes in one embodiment, a determination step 450 to determine whether the distal end of the wire 140 is out of the molten puddle 116.
  • the voltage between the distal end of the wire 140 and the workpiece 115 may be continuously monitored during the pulsing step 440. Once the monitored voltage exceeds a value indicating separation of the wire from the molten puddle, the hot wire current could be terminated at end step 460.
  • Termination of the hot wire process can include one or more of turning off the laser and/or the power supply 170 providing the current pulses to the wire 140.
  • the process can be terminated after a predetermined number of current pulses, or after the initiation of pulses for a predetermined amount of time.
  • the wire is cleared from the puddle by termination pulses and the laser remains on until the puddle can stabilize from the last droplet of wire.
  • the laser is ramped down to slow cool the "crater" or void left by the withdrawn wire and solidifying puddle.
  • FIG. 5 Another embodiment of a method for stopping a hot wire process 500 is shown in FIG. 5.
  • the filler wire feed is either stopped or alternatively retracted from the molten puddle with a heating current still being applied to the wire 140 during retraction.
  • the current to the wire and/or voltage between the wire and the workpiece are monitored for the occurrence of an arc formation between the distal end of the wire and the workpiece.
  • the heating current to the wire is terminated just before the formation of the arc and the hot wire process is brought to a conclusion.
  • FIG. 5 shows a hot wire process in progress.
  • the wire feed to the molten puddle is stopped manually or by automatic control of the wire feeder 150.
  • the process may include a retracting step 510b in which the wire feeder 150 is operated to retract the filler wire 140 from the molten puddle 116.
  • the heating current is maintained.
  • a heating current is maintained, but is maintained at a level less than the heating current during the hot wire process.
  • the withdrawal heating current is at or below 90% of the hot wire process preceding the withdrawal.
  • the molten puddle is maintained in a stable state by a separate high intensity energy source such as, for example, the laser beam 110.
  • the heating current to the wire is monitored in a monitoring step 530 and a determination step 540 is carried out to determine if an arc is about to form between the distal end of the wire 140 and the workpiece 115.
  • the monitoring step can include monitoring of the voltage between the wire 140 and the workpiece 115.
  • the determination step can be carried out by a premonition circuit of the system 100. Such a premonition circuit can determine if an arc is to form between the workpiece/molten puddle and the distal end of the wire 140 by an evaluation of the monitored currents and/or voltages. Typically, there is a depression in the puddle from the heat of the laser. As the wire arcs, there is a little separation.
  • Premonition circuits are well known in the art for arc welding and may be implemented in the system 100 and/or the controller 195 and/or the power supply 170.
  • an exemplary embodiment of a premonition circuit of the system 100 can be constructed within the sensing and current controller 195 to measure one or more of a rate of change of one of a potential difference between (dv/dt), a current through (di/dt), a resistance between (dr/dt), or a power through (dp/dt) the filler wire 140 and the workpiece 115.
  • the sensing and current controller 195 predicts or interprets from the measurement that loss of contact is about to occur.
  • the distal end of the wire 40 when the distal end of the wire 40 becomes highly molten due to heating, the distal end may begin to pinch off from the wire 140 onto the workpiece 115. If contact between the wire and the workpiece is fully lost, a potential difference (i.e., a voltage level) which is appreciably greater than zero volts may be measured by the sensing and current controller 195. This potential difference could cause an arc to form between the new distal end of the wire 140 and the workpiece 115. Accordingly, the rate of change in the voltage between the wire and the workpiece can be monitored for its approach to a known threshold at which an arc is known to form.
  • a potential difference i.e., a voltage level
  • current levels, resistance level in the wire, and/or a power level to the wire can be monitored for determining the moment before arc formation.
  • a separation voltage and/or current level can be utilized to determine if separation has or will occur and when this level if reached or exceeded it is determined that the wire 140 has separated from the puddle 116.
  • this level can be an arc generation level (voltage, current, power, etc.) which detects the imminent creation of an arc as a detection of separation.
  • the heating current to the wire is terminated in a current termination step 550.
  • the hot wire process can be terminated at end step 560. Because the stop process 500 progresses to a point just before formation of an arc between the wire 140 and the workpiece 115, the distal end of the wire is located outside of the molten puddle 116 when the heating current is terminated.
  • the hot wire process is completely terminated at step 560 in which the laser power supply 130 is turned off.
  • FIG. 6 is another embodiment of the stop method 600.
  • a stop motion step 610 provides for stopping the relative movement between workpiece 115, laser 120 and/or wire 140.
  • the wire feed rate to the molten puddle 116 is reduced and/or stopped in a feed rate reduction/stop step 620.
  • the molten puddle 116 is maintained in a maintenance step 630 of at least one embodiment of the subject stop process, in which the laser beam 110 is applied to the molten puddle so as to maintain its stability.
  • a pulsing step 640 of the subject method provides for applying a heating current to the wire 140.
  • the control subsystem 195 controls power supply 170 to apply a heating current to the filler wire 140.
  • the wire is simultaneously or subsequently retracted from the molten puddle 116 in a retraction step 650 to the point at which the wire breaks from the puddle.
  • a premonition circuit is employed so that the wire may be heated 640, retracted 650 and broken at a known point. With the wire 140 broken, an extension of the wire may remain extending from the molten puddle 116.
  • embodiments of the present invention can be utilized with a GMAW/MIG system instead of a laser.
  • a GTAW type system can be used to provide the high intensity heat as described herein.
  • the starting and stopping process is generally as described herein.
  • the GMAW/MIG/GTAW is started - the arc is initiated - prior to the initiation of the starting arc in the hot wire process - as described above.
  • the GMAW/MIG/GTAW arc is started and the arc is advanced such that a molten puddle is formed. Then the hot wire starting process is initiated.
  • the delay should not be too long such that the hot wire process is permitted to begin at the appropriate time, once the GMAW/MIG/GTAW arc creates the puddle.
  • FIG. 1 and the above description of system 100 provide for a general component description of a system for carrying any one of the subject start and/or stop methods to a hot wire process. Described in U.S. Patent Application Publication No. 2011/0297658, U.S. Patent Application Publication No. 2010/0176109, each of which is incorporated by reference in its entirety, are alternative or additional embodiments of the system 100 for carrying out the subject start and/or stop methods and an associated hot wire process.
  • control subsystem 460 end step

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Arc Welding In General (AREA)
  • Laser Beam Processing (AREA)

Abstract

Méthode et système (100) pour démarrer et/ou arrêter un processus à fil à chaud (140). Un système à fil chaud comprend un dispositif d'alimentation en fil d'apport (180) qui comprend un tube de contact (160) pour maintenir un fil d'apport (140), un mécanisme d'alimentation en fil, une alimentation électrique (130, 170) pour appliquer un courant de chauffe sur le fil ; et un contrôleur (180) couplé au mécanisme d'alimentation et à l'alimentation électrique (130, 170). Le contrôleur (180) est configuré pour réguler le courant de chauffe appliqué sur le fil (140) et positionner le fil (140) par rapport à la pièce à usiner (115) pour former un bain de fusion fondu (116, 117) avec un arc pour amorcer un processus à fil chaud (280, 380). Le contrôleur (180) peut également être configuré pour réguler l'alimentation en fil (140) dans le bain de fusion fondu (116, 117) et réguler et/ou appliquer des impulsions de courant sur le fil (140) de façon à amener le fil (140) à se rétracter et à sortir du bain de fusion fondu (116, 117) de manière stable lors de l'arrêt du processus à fil chaud (280, 380).
PCT/IB2013/001568 2012-07-20 2013-07-19 Méthode et système pour démarrer et arrêter un système à fil chaud WO2014013322A2 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE112013003613.4T DE112013003613T5 (de) 2012-07-20 2013-07-19 Verfahren und ein System zum Starten und Stoppen eines Warmdrahtsystems
CN201380049254.6A CN104661781A (zh) 2012-07-20 2013-07-19 启动和停止热焊丝系统的方法和系统
BR112015001243A BR112015001243A2 (pt) 2012-07-20 2013-07-19 método de começo de processo de fio quente; sistema de fio quente; e método de interrupção de processo de fio quente
JP2015522184A JP2015522426A (ja) 2012-07-20 2013-07-19 ホットワイヤ処理を開始及び停止させるための方法及びシステム
KR20157003299A KR20150038016A (ko) 2012-07-20 2013-07-19 핫 와이어 시스템을 시작 및 정지하기 위한 시스템 및 방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/554,255 US20130020289A1 (en) 2009-01-13 2012-07-20 Method and system to start and stop a hot wire system
US13/554,255 2012-07-20

Publications (2)

Publication Number Publication Date
WO2014013322A2 true WO2014013322A2 (fr) 2014-01-23
WO2014013322A3 WO2014013322A3 (fr) 2014-07-03

Family

ID=49237513

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2013/001568 WO2014013322A2 (fr) 2012-07-20 2013-07-19 Méthode et système pour démarrer et arrêter un système à fil chaud

Country Status (6)

Country Link
JP (1) JP2015522426A (fr)
KR (1) KR20150038016A (fr)
CN (1) CN104661781A (fr)
BR (1) BR112015001243A2 (fr)
DE (1) DE112013003613T5 (fr)
WO (1) WO2014013322A2 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104625411A (zh) * 2014-12-15 2015-05-20 哈尔滨工业大学 一种Ti2AlNb基金属间化合物与异种钛合金焊接的方法
WO2015124999A1 (fr) * 2014-02-24 2015-08-27 Lincoln Global, Inc. Procédé et système pour l'utilisation d'une combinaison d'alimentation en fil d'apport et de source d'énergie à haute intensité pour le soudage avec une fréquence d'arc régulée
WO2015125008A1 (fr) * 2014-02-24 2015-08-27 Lincoln Global, Inc. Procédé et système permettant d'utiliser une combinaison d'une alimentation en fil d'apport et d'une source d'énergie à haute intensité pour souder avec une fréquence de formation d'arc régulée
US9782850B2 (en) 2009-01-13 2017-10-10 Lincoln Global, Inc. Method and system to start and use combination filler wire feed and high intensity energy source for welding
US10086461B2 (en) 2009-01-13 2018-10-02 Lincoln Global, Inc. Method and system to start and use combination filler wire feed and high intensity energy source for welding
WO2018227097A1 (fr) * 2017-06-09 2018-12-13 Illinois Tool Works Inc. Tête de fil chaud à laser coaxial
US10464168B2 (en) 2014-01-24 2019-11-05 Lincoln Global, Inc. Method and system for additive manufacturing using high energy source and hot-wire
US11027362B2 (en) 2017-12-19 2021-06-08 Lincoln Global, Inc. Systems and methods providing location feedback for additive manufacturing
US11213908B2 (en) 2018-01-24 2022-01-04 Daihen Corporation Wire feeding device, arc welding device and wire feeding method
EP3995245A1 (fr) * 2020-11-06 2022-05-11 Illinois Tool Works, Inc. Système, procédé et appareil de préchauffage à mouvement alternatif
EP4000785A1 (fr) * 2020-11-06 2022-05-25 Illinois Tool Works, Inc. Système, procédé et appareil de préchauffage asynchrone
US11504793B2 (en) 2016-10-18 2022-11-22 Daihen Corporation Wire feeding device and arc welding device
US11931834B2 (en) 2021-04-19 2024-03-19 Fronius International Gmbh Method for regulating or controlling the conveyance speed of a wire composed of consumable material during a laser soldering or laser welding method, and laser soldering or laser welding device for carrying out such a method

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10052707B2 (en) * 2014-04-04 2018-08-21 Lincoln Global, Inc. Method and system to use AC welding waveform and enhanced consumable to improve welding of galvanized workpiece
TWI647047B (zh) * 2017-06-19 2019-01-11 廣泰金屬工業股份有限公司 雷射送線系統
US20190366466A1 (en) * 2018-05-31 2019-12-05 Illinois Tool Works Inc. Systems and methods for additive manufacturing in a controlled short circuit welding system
US20200130094A1 (en) * 2018-10-26 2020-04-30 Illinois Tool Works Inc. Systems and methods to start arc welding
US20200246899A1 (en) * 2019-02-05 2020-08-06 Illinois Tool Works Inc. Systems and methods for hybrid laser and arc welding additive manufacturing
CN110625260B (zh) * 2019-09-25 2020-07-24 西南交通大学 激光-低电流焊丝自发诱导电弧复合焊接系统的焊接方法
CN110883431B (zh) * 2019-12-03 2021-06-08 中国航空制造技术研究院 一种环形焊缝的激光电弧复合焊接方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100176109A1 (en) 2009-01-13 2010-07-15 Lincoln Global, Inc. Method and system to start and use a combination filler wire feed and high intensity energy source
US20110297658A1 (en) 2009-01-13 2011-12-08 Lincoln Global, Inc. Method and system to start and use combination filler wire feed and high intensity energy source for welding

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8952291B2 (en) * 2005-09-15 2015-02-10 Lincoln Global, Inc. System and method for controlling a hybrid welding process
JP2012030262A (ja) * 2010-08-02 2012-02-16 Panasonic Corp レーザ溶接方法とレーザ溶接装置
JP2012066288A (ja) * 2010-09-24 2012-04-05 Fanuc Ltd アークスタート時のスパッタの発生を低減するアーク溶接方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100176109A1 (en) 2009-01-13 2010-07-15 Lincoln Global, Inc. Method and system to start and use a combination filler wire feed and high intensity energy source
US20110297658A1 (en) 2009-01-13 2011-12-08 Lincoln Global, Inc. Method and system to start and use combination filler wire feed and high intensity energy source for welding

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9782850B2 (en) 2009-01-13 2017-10-10 Lincoln Global, Inc. Method and system to start and use combination filler wire feed and high intensity energy source for welding
US10086461B2 (en) 2009-01-13 2018-10-02 Lincoln Global, Inc. Method and system to start and use combination filler wire feed and high intensity energy source for welding
US10464168B2 (en) 2014-01-24 2019-11-05 Lincoln Global, Inc. Method and system for additive manufacturing using high energy source and hot-wire
WO2015125008A1 (fr) * 2014-02-24 2015-08-27 Lincoln Global, Inc. Procédé et système permettant d'utiliser une combinaison d'une alimentation en fil d'apport et d'une source d'énergie à haute intensité pour souder avec une fréquence de formation d'arc régulée
WO2015124999A1 (fr) * 2014-02-24 2015-08-27 Lincoln Global, Inc. Procédé et système pour l'utilisation d'une combinaison d'alimentation en fil d'apport et de source d'énergie à haute intensité pour le soudage avec une fréquence d'arc régulée
CN104625411A (zh) * 2014-12-15 2015-05-20 哈尔滨工业大学 一种Ti2AlNb基金属间化合物与异种钛合金焊接的方法
US11504793B2 (en) 2016-10-18 2022-11-22 Daihen Corporation Wire feeding device and arc welding device
WO2018227097A1 (fr) * 2017-06-09 2018-12-13 Illinois Tool Works Inc. Tête de fil chaud à laser coaxial
US11027362B2 (en) 2017-12-19 2021-06-08 Lincoln Global, Inc. Systems and methods providing location feedback for additive manufacturing
US11213908B2 (en) 2018-01-24 2022-01-04 Daihen Corporation Wire feeding device, arc welding device and wire feeding method
EP3995245A1 (fr) * 2020-11-06 2022-05-11 Illinois Tool Works, Inc. Système, procédé et appareil de préchauffage à mouvement alternatif
EP4000785A1 (fr) * 2020-11-06 2022-05-25 Illinois Tool Works, Inc. Système, procédé et appareil de préchauffage asynchrone
US11931834B2 (en) 2021-04-19 2024-03-19 Fronius International Gmbh Method for regulating or controlling the conveyance speed of a wire composed of consumable material during a laser soldering or laser welding method, and laser soldering or laser welding device for carrying out such a method

Also Published As

Publication number Publication date
JP2015522426A (ja) 2015-08-06
WO2014013322A3 (fr) 2014-07-03
DE112013003613T5 (de) 2015-05-28
CN104661781A (zh) 2015-05-27
KR20150038016A (ko) 2015-04-08
BR112015001243A2 (pt) 2017-07-04

Similar Documents

Publication Publication Date Title
WO2014013322A2 (fr) Méthode et système pour démarrer et arrêter un système à fil chaud
US20130020289A1 (en) Method and system to start and stop a hot wire system
US10427236B2 (en) Burner for a welding apparatus
CN108472759B (zh) 用于预热焊丝的系统、方法和设备
CA2740615C (fr) Procede et systeme d'enclenchement et d'utilisation d'un systeme combine d'alimentation en fils fusibles et de source d'energie de haute intensite method and system to start and use a combination filler wire feed and high intensity energy source
EP3062950B1 (fr) Extraction de longueur d'arc d'une tension et rétroaction de courant
US9498838B2 (en) System and method of controlling heat input in tandem hot-wire applications
US20150151375A1 (en) Method and system to use combination filler wire feed and high intensity energy source for welding with controlled arcing frequency
US20170334011A1 (en) Method and system to use combination filler wire feed and high intensity energy source for welding and arc suppression of a variable polarity hot-wire
US20150028011A1 (en) System and method of controlling heat input in tandem hot-wire applications
US20130264323A1 (en) Process for surface tension transfer short ciruit welding
US20150158108A1 (en) Method and system to use combination filler wire feed and high intensity energy source for welding with controlled arcing frequency
US20150028010A1 (en) System and method of controlling heat input in tandem hot-wire applications
EP3208024A1 (fr) Procédé de commande de soudage à l'arc
US20140131320A1 (en) System and method to detect droplet detachment
WO2015110895A1 (fr) Procédé et systèmes pour la production d'additifs à l'aide d'une source à haute énergie et d'un fil chaud chauffé par des signaux de chauffage pulsés
WO2014006488A2 (fr) Procédé et système de chauffe d'un article non durable pendant un processus utilisant un fil chaud
CN106607640B (zh) 用于交流焊接的飞溅得到减少的焊接系统
JP5840921B2 (ja) 消耗電極アーク溶接のくびれ検出制御方法
CN111683778B (zh) 用于预热焊丝的系统、方法和设备
JP7303383B2 (ja) 溶接シームを溶接するための方法および装置
WO2015124996A2 (fr) Procédé et système pour utiliser une combinaison d'alimentation en fil d'apport et de source d'énergie de haute intensité pour soudage
Zhang Arc physics of gas tungsten and gas metal arc welding
US20200215636A1 (en) Method and system for hot-wire strip wire deposition and cladding
JP2005279739A (ja) 溶接装置

Legal Events

Date Code Title Description
ENP Entry into the national phase in:

Ref document number: 2015522184

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1120130036134

Country of ref document: DE

Ref document number: 112013003613

Country of ref document: DE

ENP Entry into the national phase in:

Ref document number: 20157003299

Country of ref document: KR

Kind code of ref document: A

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112015001243

Country of ref document: BR

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A SENT 14.07.15)

122 Ep: pct application non-entry in european phase

Ref document number: 13766659

Country of ref document: EP

Kind code of ref document: A2

ENP Entry into the national phase in:

Ref document number: 112015001243

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20150119