A method and system to weld or join workpieces employing a high intensity energy source to create a weld puddle and at least one resistive filler wire which is heated to at or near its melting temperature and deposited into the weld puddle.

Method and system to start and use combination filler wire feed and high intensity energy source for welding

A method and system to manufacture workpieces employing a high intensity energy source to create a puddle and at least one resistively heated wire which is heated to at or near its melting temperature and deposited into the puddle as droplets.

Method and system for additive manufacturing using high energy source and hot-wire

In a method for controlling pulse arc welding where an arc is created between a wire and a base material, a pulse waveform different from the pulse waveform for steady-state welding is outputted when a predetermined time has passed since short-circuit welding control was started at arc start, and after a sufficiently large melt pool is formed, the pulse waveform for the steady-state welding is outputted This reduces the generation of spatters after an arc is created and until the arc is stabilized

Arc welding control method

A welding method and apparatus for welding workpieces together by conducting a forward hybrid welding process on a joint region that includes a weld seam defined by and between faying surfaces of the workpieces, and then conducting an aft hybrid welding process on the joint region. The forward hybrid welding process simultaneously causes a forward laser beam and a forward electric arc to travel along the joint region, which in combination penetrates the weld seam and forms a weld pool that solidifies to form a weldment. The aft hybrid welding process utilizes an aft electric arc and an aft laser beam to produce a second weld pool that remelts and mixes with the weldment. On cooling, a weld joint is formed that is capable of deeply penetrating the weld seam of the joint region.

Hybrid laser arc welding process and apparatus

A method for joining two substances and device for joining two substances are suited for practical use and significantly reduce the difficulty of accurately forming the focal formation position of an ultrashort pulse laser in a case of joining substances with use of a nonlinear absorption phenomenon, as well as a joined body and a manufacturing method for the for the same. Provided is a method for joining two substances by causing a nonlinear absorption phenomenon to occur with use of an ultrashort pulse laser beam. Among the two substances, a first substance that is positioned on a side on which the ultrashort pulse laser beam is incident is composed of a transparent material, and the two substances are joined by generating, at a joining face of the two substances, a filament area that is generated by a self-focusing effect of the ultrashort pulse laser beam in the first substance.

Substance joining method, substance joining device, joined body, and its manufacturing method

The invention relates to a method for welding coated sheet metal (3) by way of a laser hybrid welding method, whereby at least one laser method and one shielded arc-welding method are carried out, and a weld metal (12) is supplied to the weld by way of the shielded arc-welding method. The invention also relates to a laser hybrid welding torch for welding coated sheet metal (3), which comprises at least one laser (13) and at least one shielded arc unit (5) and a rod feeding device (11) for a welding rod (12). The aim of the invention is to provide a method or a device of the aforementioned kind which allows for reducing or completely avoiding inclusions such as are e.g. caused by the evaporation of the coating of the metal sheet (3). For this purpose, a clamping device (6) is used for positioning the coated metal sheet (3) without substantial gaps between the individual sheets. A material having a zinc and/or carbon and/or aluminum content is used as the weld metal or welding rod (12).

Laser Hybrid Welding Method and Laser Hybrid Welding Torch Using a Zinc and/or Carbon and/or Aluminum-Containing Rod

The invention relates to a single- or multi-wire welding torch (6), more specifically to a laser-hybrid single- or multi-wire welding head provided with the welding torch (6) which can be connected to a welding device via a hose assembly and consists of several parts such as a torch handle, a tubular welding torch housing, a contact tube for each welding wire (21a, 21b), a gas nozzle (2) etc., wherein an internal insert (28) for receiving the contact tube(s) (20a, 20b) and the gas nozzle (2) is mounted in an end area of the welding torch housing. A fixing element (30) made at least partially of a flexible material is placed on said internal insert (28) or on the housing (2) for producing as required an, in particular, gas-tight connection between said internal insert (28) and the gas nozzle (2) pushed thereon. This connection can be established by the spatial extension of the fixing element. A method for the process control of a robot welding post, a gas nozzle cap and a gas nozzle (2) for a welding torch (6) are also disclosed.

Welding torch with a fixing element for the gas nozzle, said element being capable of extension; process control method for a welding system equipped with said welding torch; gas nozzle for said welding torch; and contact tube for said welding torch

The invention relates to a single- or multi-wire welding torch (6), more specifically to a laser-hybrid single- or multi-wire welding head (1) provided with the welding torch (6) which is connectable to a welding device via a hose assembly and consists of several parts such as a burner handle, a tubular welding torch housing, a contact tube (20) for each welding wire (21), a gas nozzle (2) etc., wherein an internal insert (28) for receiving the contact tube(s) (20) and the gas nozzle (2) is mounted in the end area of the welding torch housing. A fixing element (30) made at least partially of an elastic material is arranged onto said internal insert (28) for producing, upon request, a particularly sealed connection between said internal insert (28) and gas nozzle (2) enclosed thereon which is obtainable by the spatial expansion of the fixing element (30). A method for controlling a robot welding post process, a gas nozzle cap and the gas nozzle (2) for the welding torch (6) are also disclosed.

Welding torch, welding head, gas nozzle and a contact pipe and a method for controlling a welding post process

Diese Anmeldung betrifft ein Verfahren zum Starten eines Laser-Hybrid-Schweisprozesses zum Schweisen von beschichteten Blechen (3), wobei zumindest ein Laserprozess und ein Schutzgasschweisprozess durchgefuhrt wird, und der Laserprozess dem Schutzgasschweisprozess voreilt, und der Schutzgasschweisprozess im Nahbereich des Lasers (13) positioniert wird, wobei uber den Schutzgasschweisprozess ein Zusatzwerkstoff an die Schweisstelle zugefuhrt wird, wobei beim Start des Laserprozesses der Brennpunkt (47) des Lasers (13) in einem definierten Abstand (42) zur Oberflache (41) des vom Laser (13) gesehenen ersten Bleches (3) eingestellt wird und der Laser (13) ab einer Ausgangsposition (46) eine voreinstellbare Langsbewegung (44) in Richtung der Schutzgaseinheit (5) und anschliesend zur Ausgangsposition (46) zuruck durchfuhrt, wobei wahrend der Vor-Ruckbewegung des Lasers (13) die Laserleistung derart geregelt wird, dass die Beschichtung (45) der Bleche (3) verdampft bzw geschmolzen wird und so mit die Oberflache (41) des vom Laser (13) gesehenen ersten Bleches (3) durch den Laser (13) von Verunreinigungen und/oder Beschichtungen befreit wird

Verfahren zum Starten eines Laser-Hybrid-Schweissprozesses zum Schweissen von beschichteten Blechen mit einer Vor-Rückbewegung des eingeschalteten Lasers zum Verdampfen der Beschichtung

A single- or multi-wire welding torch (6) has a laser-hybrid single- or multi-wire welding head (1) with a gas supply hose. The head consists of a burner handle, a tubular welding torch housing, a contact tube (20) for each welding wire (21) and a gas nozzle (2). The nozzle has inserts (28) for the contact tubes (20). The insert (28) is retained by an expanding semi-flexible element (30). Further claimed is a process to regulate a robotic welder.

Gerhard Miessbacher

Papers

Laser Hybrid Welding Method and Laser Hybrid Welding Torch Using a Zinc and/or Carbon and/or Aluminum-Containing Rod

Welding torch with a fixing element for the gas nozzle, said element being capable of extension; process control method for a welding system equipped with said welding torch; gas nozzle for said welding torch; and contact tube for said welding torch

Welding torch, welding head, gas nozzle and a contact pipe and a method for controlling a welding post process

Verfahren zum Starten eines Laser-Hybrid-Schweissprozesses zum Schweissen von beschichteten Blechen mit einer Vor-Rückbewegung des eingeschalteten Lasers zum Verdampfen der Beschichtung

Method for process control of a robot welding assembly with maintenance periodical check for changing the gas nozzle