DE202021106679U1 - Control of a welding and/or soldering fume extraction device depending on the position or movement of a connected torch - Google Patents

Abstract

Device (100, 300) for use in welding or soldering in a protective gas atmosphere,
- with connection means (180, 380) for connecting a burner (210) with integrated suction,
- with a suction device (116, 316) for providing a suction air flow (117) via the connection means (180, 380) and
- with a control device (190, 390), characterized in that
- that the control device (190, 390) is set up to receive measured values about the position and/or the movement of a burner (210) connected to the connection means (180, 380) during operation and the suction device (116, 316) depending on to control the measured values obtained.

Description

The invention relates to a device for use in welding or soldering in a protective gas atmosphere, with connection means for connecting a torch with integrated suction, with a suction device for providing a suction air flow via the connection means and with a control device. The invention further relates to a system for use in welding or soldering in a protective gas atmosphere, comprising such a device. Furthermore, the invention relates to a method for controlling a suction device of a device for use in welding or soldering in a protective gas atmosphere.

The high temperatures occurring during welding or soldering lead to the formation of exhaust gases, especially smoke, some of which are harmful to health. To protect workers in the immediate vicinity of the welding operation, it is necessary to extract these fumes from the workplace before they mix with the ambient air.

A particular difficulty in extracting the exhaust gases becomes apparent when processes for welding or soldering are carried out in a protective gas atmosphere. Proper operation requires that the shielding gas applied during the welding or brazing process safely covers the electrode and the workpiece at the point where material is melted. Otherwise, oxidation processes and other reactions can occur at the point in question, which can adversely affect the quality of the welding or soldering. If protective gas is provided directly on or around the electrode that generates the arc, it is necessary for the formation of a stable protective gas jacket that no disruptive air currents entrain the protective gas.

Various methods and devices for controlling the suction device of a welding device are known from the prior art. In the EP 2 292 367 B1 For example, a method is disclosed in which the suction is controlled as a function of process parameters of the welding process that can be set or preset on the welding device, namely, for example, for the torch feed speed, the wire feed speed or the wire diameter.

However, it has been shown that even with such an automatic control of the suction device, there is still a need for improvement in terms of user-friendliness and work efficiency.

Against this background, the object of the present invention is to provide a method and a device with which the suction can be controlled in a more user-friendly and/or effective manner.

This object is achieved according to the invention by a device for use in welding or soldering in a protective gas atmosphere with connection means for connecting a torch with integrated suction, with a suction device for providing a suction air flow via the connection means and with a control device, wherein the control device is set up to measure values via to obtain the position and/or the movement of a burner connected to the connection means during operation and to control the suction device depending on the measured values obtained.

In terms of process, the above-mentioned object is achieved according to the invention by a method for controlling a suction device of a device for use in welding or soldering in a protective gas atmosphere, in particular the device described above or an embodiment thereof, in which one or more measured values about the position and/or the movement of a torch connected to the device for welding or soldering and in which the suction device is controlled depending on the one or more measured values.

The device is designed for use in welding or soldering in a protective gas atmosphere. In particular, the device can be designed for use in gas metal arc welding (MAG welding), for example for metal inert gas welding (MIG welding) or metal active gas welding (MAG welding). Alternatively, the device can also be designed for use in tungsten inert gas welding (TIG welding) or for plasma welding.

The device can include a power source, in particular a welding power source or a soldering power source, for providing a welding or soldering current. For example, the suction device or the control device of the device or a part thereof can be integrated into the power source. However, it is also conceivable that the device has no power source and a separate power source is used for welding or soldering.

Accordingly, the device can be used, for example, alone or together with other devices, for example a separate welding or soldering power source, for welding or soldering in a protective gas atmosphere.

The device can be housed in one or more housings. In particular, the device can comprise more than one device, for example a power source and a wire feed device or a suction device designed as a separate device and a wire feed device.

If the device includes a power source for providing a welding or soldering current, this preferably includes a power unit for providing the welding or soldering current and a control unit for controlling the power source.

The device also has connection means for connecting a burner with integrated suction. The connection means can in particular comprise one or more connections to which the hose package of the burner can be connected for operation. The torch is preferably a hand torch. Alternatively, the torch can also be a torch for automated welding, in particular robotic welding.

The device also includes a suction device. The suction device serves to provide a suction air flow via the connection means. For this purpose, the connection means include, in particular, a connection for coupling a suction line provided in the hose pack of the burner to the suction device.

If the device includes a power source for providing a welding or soldering current, the suction device can be accommodated in the power source, for example.

Alternatively, the suction device can also be provided as a separate device. This is particularly advantageous in MSG welding, since the wire feeder commonly used in MSG welding with the welding torch connected to it can be very far away from the welding power source during operation, for example 30 to 60 m. A separate extraction device can then be nearby of the wire feeder must be positioned in order to keep the suction line in the hose pack of the torch as short as possible and to keep the electrical power required for the desired suction air flow as low as possible.

The device further comprises a control device. The control device can be formed, for example, by a control unit of the suction device or, if the device comprises a welding or soldering power source, by a control unit of the welding or soldering power source or can include this. If the suction device has its own control unit, this can be connected, for example, to a control unit of the power source and/or to a control unit of a wire feeder via a data connection.

The control device is set up to receive measured values about the position and/or the movement of a burner connected to the connection means during operation and to control the suction device depending on the measured values obtained. In this way, the suction device can be operated automatically as a function of a change in position and/or movement of the burner. It was found that in this way a more user-friendly and more effective control of the suction device can be achieved.

The position of the burner is understood to mean, in particular, the orientation of the burner part in space, for example its alignment with the vertical direction. The measured values for the position of the burner can be, for example, measured values for the inclination of the burner, in particular of the burner part, to the vertical direction. Such measured values can be measured, for example, by an inclination sensor provided in the burner part. The control of the suction device depending on measured values about the position of the burner enables an automatic position-dependent operation of the suction device. In this way, for example, the extraction capacity can be adapted to the position of the torch and the associated welding or soldering position.

The measured values relating to the movement of the burner can, for example, be measured values relating to the acceleration of the burner, in particular of the burner part, in one or more directions. For example, the measured value can indicate an absolute value of the acceleration or an acceleration vector. Such measured values can be measured in particular by an acceleration sensor provided in the burner part. The control of the suction device depending on measured values about the movement of the burner enables operation of the suction device depending on the use of the burner. For example, it can be achieved in this way that the operation or power operation of the extraction device is started automatically when the welder picks up the torch, so that the extraction current required for the welding or soldering process can already be set before the welder can start the actual welding or soldering process begins.

The aforementioned object is also achieved according to the invention by a system for use in welding or soldering under protective gas atmosphere comprising the device described above or an embodiment thereof and a connectable to the connection means of the device burner with integrated suction.

The torch is preferably a hand torch. Alternatively, the torch can also be a torch for automated welding, in particular robotic welding. In particular, the burner can have a burner part with a handle and a burner head as well as a hose package for connecting the burner part to the connection means of the device. The hose package can have, for example, one or more connections for coupling to one or more connections of the connection means of the device.

Various embodiments of the device, the system and the method are described below, with the individual embodiments each independently of one another applying both to the device and the system and to the method. Furthermore, the embodiments can be combined with one another as desired.

In one embodiment, the control device is set up to control the suction power as a function of the measured values obtained, in particular to set a suction power value that is dependent on the measured values obtained. In a corresponding embodiment of the method, the suction capacity of the suction device is controlled as a function of the one or more measured values obtained, in particular a suction capacity value that is dependent on the one or more measured values obtained is set. In this way, the extraction capacity can be automatically adjusted to the position of the torch, for example, so that a stable protective gas jacket can be guaranteed for different welding positions, for example. In particular, different welding positions require different exhaust air flows in order to create a stable shielding gas envelope. By controlling the suction device depending on the one or more measured values about the position of the torch, these different requirements can be automatically taken into account depending on the welding position.

The suction power can be controlled, for example, via the volume flow, for example by controlling a valve, and/or via the speed of a rotor of the suction device and/or via the electrical operating power with which the suction device is operated.

The suction power value can be a target value or a lower and/or upper limit value, for example for the volume flow, for a rotor speed of the suction device and/or for an electrical operating power. For example, the suction device can have a control for the suction capacity, the target value or operating range of which is set depending on the one or more measured values obtained. A suitable target value for the volume flow can be in the range between 20 m ³ /h and 100 m ³ /h, for example.

In one embodiment, the control device is set up to receive the measured values from the burner that is connected to the connection means during operation, in particular via the connection means. In this way, separate external sensors for monitoring the position and/or the movement of the burner are not required. In particular, measured values can be used in this way that are determined by one or more sensors in the burner, in particular in the burner part. Some burners already have such sensors for other purposes. In this case, the suction device can be controlled using measured values that are determined using sensors that are already present in the burner, so that no additional sensors are required. The measured values can in particular be measured values that are determined by means of a position and/or movement sensor in the burner.

In a corresponding embodiment of the system, the burner has one or more sensors for measuring values relating to the position and/or the movement of the burner and the burner is set up to transmit measured values measured using the one or more sensors to the device, in particular via the connection means of the device. The one or more sensors can in particular include an inclination sensor and/or an acceleration sensor.

In a corresponding embodiment of the method, the one or more measured values about the position and/or the movement are measured using a sensor integrated into the burner.

In a further embodiment, the control device is set up to detect a movement of the burner depending on the measured values obtained and, when the movement is detected, to switch on the suction device or to switch to power operation, in particular to increase the suction power. For example, the control device can be set up to detect movement of the burner after a predetermined minimum period of time without movement. For example, the control device can determine when the torch is moved again for the first time after a longer period of time, for example due to the welder picking up the torch. In this way, the operation or power operation of the suction device begins before the actual welding or soldering process begins, so that the negative pressure required for the desired suction flow can build up and the required suction flow is immediately available when a welding or soldering process begins.

The control device can be set up to only detect a movement of the burner when the measured values are above a specific threshold value. In this way, incorrect detections of movements due to measured values below the threshold value, which are caused, for example, by vibrations or shocks in the vicinity of the burner, can be prevented.

In one embodiment, the control device is set up to receive a torch button signal by actuating a torch button of a burner connected to the connection means during operation and to switch on the suction device or to increase its suction capacity for high-power operation when the torch button signal is received. In this way, the user can start the suction device manually or switch from idle operation at a low speed to high-power operation before he starts welding or soldering, in particular by pressing the torch button again. In this way, the operation or power operation of the suction device begins before the actual welding or soldering process begins, so that the negative pressure required for the desired suction flow can build up and the required suction flow is immediately available when a welding or soldering process begins. For this purpose, the control device can preferably be set up to switch on the suction device when receiving a first torch button signal or to increase its suction power for high-power operation and to start a welding and/or soldering process when a subsequent second torch button signal is received.

In one embodiment, the connection means comprise a suction connection for connecting a suction line of a burner that is connected to the connection means during operation. If the device includes a power source for providing a welding or soldering current, the suction device can be integrated into the power source, for example, and the suction connection can be arranged on the power source. If the suction device is designed as a separate device, the suction connection can in particular be arranged directly on the suction device.

For example, a torch can be connected to such a device with a suction connection, the hose package of which has several connections, in particular a connection for connecting the hose package to a torch connection of a wire feeder and another connection for connecting the hose package to the suction connection.

In one embodiment, the device includes a power source for providing a welding or soldering current. The suction device can be integrated into the power source, for example.

In one embodiment, the device comprises a wire feeder and the connection means comprise a torch connection on the wire feeder. The torch connection serves in particular to provide the welding or soldering wire fed with the wire feeder. Furthermore, the burner connection can be designed to provide a flow of protective gas. Furthermore, the torch connection can be set up to provide the welding or soldering current provided by the welding current source.

The wire feeder preferably has a control unit. For example, the control device of the device can be formed by the control unit of the wire feed device or can include it. In particular, the control unit of the wire feeder can be connected to the suction device, in particular a control device of the suction device, via a data connection.

In one embodiment, the control device is set up to initially set the suction power to a starting suction power value at the beginning of the operation or power operation of the suction device and then to reduce it.

In this way, the suction device is initially operated with a high starting suction power in order to be able to build up the negative pressure required to provide the suction air flow more quickly. As a result, the period of time between the start of the suction device or the start of power operation of the suction device and the achievement of the desired suction capacity or the desired suction air flow can be shortened. The starting suction power can be set depending on or independently of the measured values become. For example, the control device can be set up to operate the suction device for a specific period of time with the starting suction power value before the suction power is reduced.

The suction power is preferably reduced to a target suction power or a target suction air flow, which is set as a function of the measured values. In particular, the control device can be set up for this purpose.

Further advantages and features of the device, the system and the method result from the following description of exemplary embodiments, reference being made to the attached drawing.

character list

• 1a-b an embodiment of the device and the system,
• 2 the exemplary embodiment 1a-b in abstract representation,
• 3a-c Diagrams for an embodiment of the method with the devices 2 and 5 ,
• 4 a further embodiment of the device and the system and
• 5 the exemplary embodiment 4 in an abstract representation.

The 1a-b show an embodiment of the device and the system in a schematic representation. 1a shows a schematic view of the device 100 and the system 200. 1b shows a schematic detailed view 1a .

In the present exemplary embodiment, the device 100 is designed as a device for use in welding and is correspondingly described below. Alternatively, it is also conceivable to design the device 100 in a corresponding manner as a device for use in soldering.

Furthermore, the device 100 in the present exemplary embodiment is designed for use in metal inert gas (MAG) welding, for example for metal inert gas (MIG) or metal active gas (MAG) welding. Alternatively, however, the device 100 could also be designed for use in TIG welding or plasma welding.

The device 100 comprises a welding power source 110 for providing a welding current with a power unit 112, a control unit 114 and a suction device 116 integrated into the welding power source 110. The control unit 114 is set up to control the welding power source 110 and in particular controls the power unit 112 and the suction device 116. The power unit 112 is set up to provide a welding current for welding via an electrical output 118 of the welding current source 110 . Furthermore, the welding power source 110 has a suction connection 120 for a suction line, the suction device 116 being set up to provide a negative pressure or suction air flow via the suction connection 120 .

The device 100 further includes a wire feeder 150 for transporting a welding wire 152. The wire feeder 150 has a welding wire supply 154 in the form of a welding wire drum, a welding wire feed device 156, which preferably includes driven rollers for the controlled feeding of the welding wire 152, and a control unit 160, which is used to control of the wire feeder 150 is formed on.

The wire feeder 150 also has an electrical input 162 for feeding in the welding current provided by the welding power source 110, which is connected to the electrical output 118 of the welding power source via an electrical line 119 for operation. Furthermore, the wire feeder 150 has a protective gas inlet 164 for feeding in a protective gas, which is connected for operation via a gas line 165 to a protective gas source 166, such as a gas cylinder.

The wire feeder 150 also has a torch connector 168 for connecting a welding torch 210 . The welding wire 152 conveyed by the welding wire conveyor device 156, the welding current provided by the welding current source 110 and the protective gas provided by the protective gas source 166 are provided for the welding torch 210 via the torch connection 168.

The control unit 160 is set up in particular to control the welding wire conveying device 156 . Furthermore, the control unit 160 can be set up to control the protective gas flow provided at the torch connection 168 . For this purpose, the wire feeder 150 can have, for example, a controllable valve 169 between the protective gas inlet 164 and the torch connection 168, with which the protective gas flow can be adjusted.

The control unit 114 of the welding power source 110 and the control unit 160 of the wire thruster 150 are preferably connected to one another via a communication connection, for example via line 119 or via a separate data line, so that one of the two control units 114, 160 can transmit control commands to the other of the two control units 114, 160. In this way, for example, the control unit 114 can be set up to control both the welding power source 110 and the wire feeder 150 . Control unit 114 and control unit 160 together form a control device 190 of device 100.

A respective user interface 122, 172 is preferably provided on the welding power source 110 and/or on the wire feed device 150, via which the user can read operating information and/or enter control commands.

The system 200 includes the device 100 and a welding torch 210 connected to the device 100 . The welding torch 210 has a torch part 212 and a hose package 214 with which the torch part 212 is connected to the device 100 . 1b shows a schematic detailed view of the burner part 212.

Hose package 214 is connected to torch connection 168 of wire feed unit 150, so that during operation the welding wire 152 conveyed by welding wire conveyor device 156 is routed via torch connection 168 through a hollow line running through hose package 214 to torch part 212, and then the one provided by welding power source 110 and the welding current looped through the wire feeder 150 is conducted via the torch connection 168 by an electrical line running through the hose package 214 to the torch part 212, where the welding current is conducted to the welding wire 152 via a contact. Furthermore, during operation, the protective gas flow provided at the torch connection 168 is routed through a protective gas line running through the hose package 214 to the torch part 212 in order to produce a protective gas jacket there for the welding process.

The hose package 214 is also connected via a branch to the suction connection 120 of the welding power source 110, so that during operation a suction air flow 117 caused by the suction device 116 can be made available on the torch part 212 via a suction line running through the hose package 214.

The torch connection 168 of the wire feeder 150 and the extraction connection 120 of the welding power source together form connection means 180 of the device 100 for connecting the torch 210.

The torch part 212 comprises a handle 216 and a torch head 218 with an opening 220 from which, during operation, the welding wire 152 to which the welding current is applied is guided out and the protective gas flow 170 emerges.

The torch head 218 also has suction openings 222, which are connected to the suction device 116 via the hose assembly 214 and the suction connection 120, so that during operation a suction air flow 117 is provided at the torch head 218, with which the fumes produced during welding are suctioned off through the torch head 218 .

A torch button 230 is provided on the handle 216 of the torch part 212 . In the case of simple welding torches, the connection poles of the torch button are connected to corresponding contacts on torch connection 168 via two electrical torch button lines running through hose package 214, so that control device 190 can determine that torch button 230 has been actuated and, for example, can start a welding process when torch button 230 is actuated . In the case of technically advanced welding torches with their own torch control unit 232 , the torch button can be additionally or alternatively connected to the torch control unit 232 . The torch control unit 232 can be connected to the control device 190 via the torch button lines and/or via separate data lines running through the hose package and contacts at the torch connection 168 or suction connection 120 .

Furthermore, several sensors 240, 242 are arranged in the burner part 212, for example in the handle 216 of the burner part 212, with which measured values about the position and/or movement of the burner part 212 can be measured. The sensor 240 can be a position sensor, for example, which measures the inclination of the burner part 212 to the vertical direction. Sensor 240 can be designed, for example, as a two-axis position sensor that measures the inclination of burner part 212 about a longitudinal axis (e.g. L1 or L2) and a transverse axis (e.g. Q, perpendicular to the plane of the drawing in 1b ) measures.

The sensor 242 can be, for example, a three-axis acceleration sensor that measures measured values for the acceleration of the burner part 212 in three spatial directions.

The functioning of the device 100 and the system 200 for controlling the suction device device 116 is based on the 2 and 3a-c explained.

2 shows the control unit 114 of the welding power source 110, the suction device 116 connected to the control unit 114 and the suction connection 120 to which the welding torch 210 is connected. Furthermore shows 2 the control unit 160 of the wire feeder 150 and the torch connection 168 to which the welding torch 210 is also connected. Extraction connection 120 and torch connection 168 together form connection means 180 of device 100 for welding torch 210. Control units 114 and 160 together form control unit 190 of device 100.

Torch control unit 232 of welding torch 210 is set up to receive measured values about the position of torch part 212 from sensor 240 and measured values about the movement of torch part 212, namely its acceleration, and to send them via a data line in hose package 214, which can be used, for example, via a appropriate contact at torch port 168 or at exhaust port 120 is received from controller 190.

The control device 190 is set up to control the suction device 116 depending on the measured values obtained.

The 3a-c illustrate a possible control of the suction device by the control device 190.

In the diagram in 3a the time t is plotted on the abscissa and the volume flow V is plotted on the ordinate. The dashed line shows the volumetric flow (desired value) set by the control device 190 on the suction device 116 . The solid line shows the actual volume flow (actual value).

des Brennerteils 212 aufgetragen. Die Beschleunigung ist vorliegend als Betrag eines vom Sensor 240 gemessenen dreidimensionalen Beschleunigungsvektors $\overrightarrow{a}$

aufgetragen.In the diagram in 3b is the time t on the abscissa and the acceleration on the ordinate $\left|\overrightarrow{a}\right|$

of the burner part 212 is applied. In the present case, the acceleration is the magnitude of a three-dimensional acceleration vector measured by sensor 240 $\overrightarrow{a}$

applied.

In the diagram in 3c the time t is plotted on the abscissa and an inclination angle φ of the burner part 212 is plotted on the ordinate. The tilt angle φ is measured by the sensor 242 and may indicate, for example, the tilt of the longitudinal axis of the torch portion 212 to the perpendicular direction.

At time t ₀ , the welding torch 210 connected to the connection means 180 is at rest and, for example, hangs with the hose pack over a holder provided on the welding current source 110 or on the wire feeder 150 . At this time, the exhaust device 116 is switched off or in an idle mode (V=0).

liegen, werden diese Beschleunigungswerte von der Steuereinrichtung 190 nicht als Bewegung des Schweißbrenners 210 gewertet.As long as the welding torch 210 is at rest, the sensor 240 only measures small accelerations, which are caused, for example, by vibrations in the environment or by the welding device 110 being driven around. Since the measured acceleration values are below a specified threshold value ${\left|\overrightarrow{a}\right|}_0$

lie, these acceleration values are not evaluated by the control device 190 as a movement of the welding torch 210.

Die Steuereinrichtung 190 ist dazu eingerichtet, ein solches Überschreiten des Schwellwertes ${\left|\overrightarrow{a}\right|}_0$

als Bewegung des Schweißbrenners 210 zu detektieren und die Absaugeinrichtung 116 einzuschalten, wenn diese noch ausgeschaltet ist, oder die Absaugeinrichtung 116 auf einen Leistungsbetrieb umzuschalten, insbesondere die Absaugleistung zu erhöhen.At time t ₁ the welding torch is picked up by the welder in order to carry out a welding process. Due to this movement of the torch 210, the acceleration of the torch exceeds the threshold ${\left|\overrightarrow{a}\right|}_0.$

The control device 190 is set up to detect such an exceeding of the threshold value ${\left|\overrightarrow{a}\right|}_0$

as a movement of the welding torch 210 and to switch on the suction device 116 if it is still switched off, or to switch the suction device 116 to power operation, in particular to increase the suction power.

Furthermore, the control device 190 is set up to set the suction power of the suction device 116 initially for a period of time T ₁₂ to a starting suction power value, in 3 specified as the starting volume flow value V̇ ₀ before the suction power is lowered to a target volume flow value V̇ ₁ at time t ₂ . In this way, a high starting volume flow value is initially set, which causes the suction device 116 to start up more quickly, so that the desired target volume flow value V ₁ is reached more quickly. Accordingly, the in 3 actual value of the extraction power shown as a solid line from time t ₁ shows a very steep increase. When the specified setpoint value changes at time t ₂ , the actual value then shows a progression to the setpoint volume flow value V̇ ₁ caused by the volume flow control of the suction device 116 .

The time period T ₁₂ can be predetermined. Alternatively, the time period T ₁₂ can be selected depending on the actual value of the suction power. For example, the control device 190 can switch from the starting volume flow value V ₀ to the target volume flow value V ₁ when the actual value has exceeded the target volume flow value V ₁ .

oder φ. Insbesondere kann die Steuereinrichtung 190 dazu eingerichtet sein, den Soll-Volumenstromwert abhängig von der durch φ angezeigten Lage des Brenners 210 auszuwählen, über die auf die Schweißposition rückgeschlossen werden kann.The setpoint volume flow value V̇ ₁ can be a predetermined setpoint volume flow value. It is also conceivable that the target volume flow value is determined, for example as a function of the measured values for the position and/or movement of the burner 210, in particular as a function of $\left|\overrightarrow{a}\right|$

or φ. In particular, the control device 190 can be set up to select the setpoint volume flow value as a function of the position of the torch 210 indicated by φ, from which the welding position can be inferred.

In the present example, the control device 190 is set up to select and set a predefined target volume flow value V̇ ₁ if the angle of inclination φ is within the in 3c P ₁ designated angle range, and select and set a predetermined target volume flow value V̇̇ ₂ when the angle of inclination φ within the in 3c P ₂ designated angular range is located. In this way, the target volume flow of the suction device 116 can be set automatically as a function of the position of the welding torch 210 and thus as a function of the welding position.

At time t ₃ , the welder changes the welding position, for example, and thereby the position of the torch, whereupon the control device 190 automatically adjusts the target volume flow value.

A more precise determination of the welding position can be achieved, for example, in that, in addition to the angle of inclination φ, another angle of inclination around a transverse axis of the torch 210 is also taken into account.

4 shows a further embodiment of the device and the system in one of 1a corresponding schematic representation. Furthermore shows 5 one of the 2 corresponding representation for the other embodiment.

The device 300 and the device 100 have a similar structure and a similar mode of operation, so that in the following primarily the differences between the two devices are described and otherwise reference is made to the above description.

In the present exemplary embodiment, the device 300 is designed as a device for use in welding and is correspondingly described below. Alternatively, it is also conceivable to design the device 300 in a corresponding manner as a device for use in soldering.

Furthermore, the device 300 in the present exemplary embodiment is designed for use in metal inert gas (MAG) welding, for example for metal inert gas (MIG) or metal active gas (MAG) welding. Alternatively, however, the device 300 could also be designed for use in TIG welding or plasma welding.

The device 300 differs from the device 100 in that the suction device 316 is designed as a suction device 317 that is separate from the welding power source 310 . The device 300 comprises the suction device 317 and a wire feed device 350 connected to it during operation. In the present case, the welding power source is designed separately and is not part of the device 300.

Like the welding power source 110 , the welding power source 310 has a power unit 312 , a control unit 314 and a user interface 322 . Furthermore, the welding power source 310 has a connection 318 for a hose package 319 to the wire feed device 350 . The welding current from the power unit 312 and the protective gas flow conducted through the welding current source 310 and controlled, for example, by a controllable valve 324 of the welding current source 310 are provided via the connection 318 .

The suction device 317 has a control unit 330, a fan 332 controlled by the control unit 330 for generating the suction volume flow, a suction connection 344 and a user interface 336. The welding torch 210 is connected to the torch connection 368 of the wire feed device 350 and to the suction connection 344 of the suction device 317 via the hose package 214 . The torch connection 368 and the suction connection 344 together form the connection means 380 of the device 300. The control device 390 of the device 300 includes the control unit 330. In addition, the control device 390 can optionally also include the control unit 360 of the wire feeder 350.

Control device 390 is set up to transmit measured values relating to the position and/or the movement of a burner 210 (see Fig. 1b ) to receive, especially to receive. For this purpose, for example, a contact for contacting a data line in hose package 214 can be provided on suction connection 344, via which measured values sent by burner 210, for example from sensor 240 or 242, can be received by control unit 330. Alternatively, a contact for contacting a data line in the hose package 214 can also be provided on the torch connection 368 via the data line sent by the torch 210 Measured values, for example from the sensor 240 or 242, can be received by the control unit 360 of the wire feeder 350, which forwards the torch identification via a data connection 372 to the control unit 330.

The control device 390, in particular the control unit 330, is also set up to control the suction device 316, in particular the fan 332, as a function of the measured values obtained. The suction device 316, in particular the fan 332, can be controlled as a function of the measured values in a similar manner to that using FIG 2 and 3 for the device 100 referred to herein.

The device 300 and the burner 210 connected to it together form the system 400.

The design of the suction device 316 as a separate suction device 317 has the advantage that it can be arranged close to the wire feed device 350, even if the wire feed device 350 is far away from the welding power source 310 via a long hose pack 319.

With the previously described devices 100, 300, the systems 200, 400 and the methods described, the control of the suction can be simplified or improved. In particular, the suction device can be started automatically when the torch moves, such as when the welder picks up the torch or a welding robot moves the torch, and/or the suction power can be set in particular depending on the position of the torch and thus switched on automatically the welding position can be adjusted so that exhaust gases, in particular smoke gases, are reliably extracted from the welding or soldering point and at the same time a stable protective gas jacket is made possible.

Reference List

100, 300

contraption

110, 310

welding power source

112, 312

power section

114, 314

Welding power source control unit

116, 316

suction device

117

exhaust air flow

118

electrical output of the welding power source

119

electrical line

120, 344

suction port

122, 322

Welding power source user interface

150, 350

wire feeder

152

welding wire

154

welding wire stock

156

welding wire conveyor

160, 360

Wire feeder control unit

162

electrical input

164

shielding gas inlet

165

gas line

166

protective gas source

168, 368

torch connection

169, 324

Valve

170

protective gas flow

172, 372

Wire feeder user interface

180, 380

connection means

190, 390

control device

200, 400

system

210

welding torch

212

burner part

214, 319

hose pack

216

handle

218

burner head

220

opening

222

suction openings

230

torch trigger

232

burner control unit

240, 242

sensor

317

suction device

318

Connection of the welding power source for a hose package

330

Control unit of the suction device

332

fan

336

User interface of the suction device

372

Data Connection

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 2292367 B1 [0004]

Claims (11)

Device (100, 300) for use in welding or soldering in a protective gas atmosphere, - with connection means (180, 380) for connecting a torch (210) with integrated suction, - with a suction device (116, 316) for providing a suction air flow (117) via the connecting means (180, 380) and - with a control device (190, 390), characterized in that the control device (190, 390) is set up to transmit measured values about the position and/or the movement of a device during operation to the connecting means (180, 380) connected burner (210) and to control the suction device (116, 316) depending on the measured values obtained. device after claim 1 , characterized in that the control device (190, 390) is set up to control the suction capacity as a function of the measured values obtained, in particular to set a suction capacity value that is dependent on the measured values obtained. device after claim 1 or 2 , characterized in that the control device (190, 390) is set up to receive the measured values from the burner (210) connected to the connection means (180, 380) during operation, in particular via the connection means (180, 380). Device according to one of Claims 1 until 3 , characterized in that the control device (190, 390) is set up to detect a movement of the burner (210) depending on the measured values obtained and to switch on the suction device (116, 316) or to switch to power operation when the movement is detected. Device according to one of Claims 1 until 4 , characterized in that the control device (190, 390) is set up to receive a torch button signal via the actuation of a torch button (230) of a torch (210) connected to the connection means (180, 380) during operation and, upon receipt of the torch button signal, to Turn on the suction device (116, 316) or increase the suction capacity. Device according to one of Claims 1 until 5 , characterized in that the connection means (180, 380) comprise a suction connection (120, 344) for connecting a suction line of a burner (210) connected to the connection means (180, 380) during operation. Device according to one of Claims 1 until 6 , characterized in that the device (100, 300) comprises a power source (110, 310) for providing a welding or soldering current. Device according to one of Claims 1 until 7 , characterized in that the device (100, 300) comprises a wire feeder (150, 350) and the connection means (180, 380) comprise a connection (168, 368) on the wire feeder (150, 350). Device according to one of Claims 1 until 8th , characterized in that the control device (190, 390) is set up to initially set the suction power at the beginning of the operation or power operation of the suction device (116, 316) to a starting suction power value and then to reduce it. System (200, 400) for use in welding or soldering in a protective gas atmosphere, - comprising a device (100, 300) according to one of Claims 1 until 9 and - a burner (210) with integrated suction which can be connected to the connection means (180, 380) of the device (100, 300). system after claim 10 , characterized in that the burner (210) has one or more sensors (240, 242) for measuring values about the position and/or the movement of the burner (210) and the burner (210) is set up to use the one or more sensors (240, 242) to transmit certain measured values to the device (100, 300), in particular via the connection means (180, 380) of the device (100, 300).

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