AT13190U1 - Burner replacement module, welding torch, elbows, torch holder, hose package for a torch, pick-up module, torch change system and method for automatically changing a pipe bend or torch holder of a welding torch - Google Patents

Abstract

The invention relates to a burner change module (27) for a welding torch (10), which welding torch (10) at least one pipe bend (28) and a burner holder (29) via a hose package (23) with therein lines for supplying the welding torch ( 10) with energy and protective gas (8) with a welding device (1) is connectable, and such a welding torch (10), pipe bend (28), burner holder (29), hose package (23) and a method for automatically changing a pipe bend (28 ). According to the invention, an intermediate piece (30) for connecting the pipe bend (28) with the burner holder (29) or the burner holder (29) with the hose package (23) is provided for automatically changing the pipe bend (28) or the burner holder (29) Holding module (31) which is displaceable between a fixing position and a release position, wherein the displacement of the holding module (31) via a hose in the package (23) extending line is controllable, and the intermediate piece (30) coupled to the holding module (31) Receiving (33) and a connection (34).

Description

Austrian förestawt AT13 190U1 2013-08-15

Description: The invention relates to a burner replacement module for a welding torch, which is designed in particular for attachment to a welding robot, which welding torch comprises at least one pipe bend and connectable to the pipe bend burner holder, which burner holder via a hose package with therein lines for supplying the welding torch with energy and inert gas can be connected to a welder.

The invention further relates to a welding torch, which is designed in particular for attachment to a welding robot, with at least one pipe bend and connectable to the pipe bend burner holder, which via a hose package with therein lines for supplying the welding torch with energy and inert gas with a Welding machine is connectable.

Furthermore, the invention relates to a pipe bend for a welding torch with a connection.

Likewise, the invention relates to a burner holder for a welding torch, with a connection for connection to a hose package, via which the welding torch is connected via therein extending lines for supplying the welding torch with energy and inert gas with a welding machine.

Furthermore, the invention relates to a hose package for a welding torch, with a connection for connection to a burner holder or a pipe bend.

Finally, the invention relates to a method for automatically changing a pipe bend or a burner holder of a preferably attached to a welding robot welding torch, wherein the welding torch is connected via a hose package with therein lines for supplying the welding torch with energy and inert gas with a welding machine, said to change the pipe bend or the burner holder of the welding torch is placed in a change position and a change of the pipe bend or the burner holder is performed.

Systems for automatic burner replacement are known from the prior art, in which always additional lines are required for control. The disadvantage here is that thus the weight is increased and the flexibility of the hose package is deteriorated in its bending property.

The object of the invention is to provide a burner replacement module, a welding torch, a pipe bend, a burner holder, a hose assembly, and a method for changing a pipe bend or a burner holder of a welding torch, through which an automatic burner replacement without additional components and lines is possible.

This object is achieved by a burner exchange module above, wherein for automatic exchange of the pipe bend or the burner holder, an intermediate piece for connecting the pipe bend with the burner holder or the burner holder is provided with the hose package, which intermediate piece comprises a holding module, which between a fixing position in which the pipe bend or the burner holder is fixable, and a release position in which the pipe bend or the burner holder is releasable, is displaceable, wherein the displacement of the holding module is controllable via a line running in the hose package, and the intermediate piece a receptacle for releasable connection with the pipe bend or the burner holder and a connection for connection to the burner holder or the hose package, wherein the receptacle is coupled to the holding module. It is advantageous in this case that by using an additional component at any time any welding system for automatic burner replacement can be converted without changing or changing the hose assembly. Another advantage is that when using a spacer no structural restrictions arise, 1/37

8steTOd »5C !!« S AT13 190U1 2013-08-15 because the shape of the spacer is adapted to the torch shape and thus no parts or elements protrude significantly beyond the outer shape of the torch. Thus, the accessibility of the system is not further limited. A particular advantage is that any existing pipe bend or burner can be used by such a design for the automatic change of the burner. Since the control of the retaining module of the burner replacement module is carried out over a running already in the hose package line, no additional connections must be made. Thus, the accessibility is not affected, since no pipe protrudes from the system, which must be taken into account when positioning the burner. Also a rapid conversion of plants is possible. The embodiment in which the intermediate piece has a receptacle for detachable connection to the pipe bend or the burner holder and a connection for connection to the burner holder or the hose package, and the receptacle is coupled to the holding module, represents a simple realization possibility. Preferably, the receptacle formed of the intermediate piece corresponding to the terminal. This ensures that the components of the welding torch are connectable without interposition of the intermediate piece. The intermediate piece can be easily inserted between two provided with corresponding receptacles and connections components of the welding torch, whereby an automatic change of these components can be made.

Advantageously, the displacement of the holding module via the line for supplying the welding torch with protective gas can be controlled. About such a line, the control of the displacement of the holding module can be done pneumatically or hydraulically. When the pressure in the line drops, the holding module is preferably positioned in the fixing position and thus the pipe bend or the burner holder is fixed to the burner holder or the hose package.

According to a feature of the invention it is provided that the receptacle substantially by a cylindrical bore and a corresponding connection for receiving connection to the pipe bend or on the burner holder substantially by a cylinder having a groove extending over the circumference for receiving at least one clamping ball of Holding module is formed.

The holding module may have a cone which fixes in the fixing position, the at least one clamping ball in the groove of the connection of the pipe bend or the burner holder and releases in the release position the at least one clamping ball.

An embodiment in which the holding module is held by a spring element in the fixing position, is advantageous because in case of failure of the control of the holding module, this is positioned in a defined position. The fact that the holding module is held in the fixing position in the absence of control, an unwanted removal of the components of the welding torch can be prevented.

An advantage is an embodiment in which a connectable with the line for the shielding gas pressure chamber is arranged in the intermediate piece, wherein by building a pressure in the pressure chamber, the holding module is displaceable against the spring element in the release position. As a result, a control via only one line can be made possible and no additional lines must be laid.

But it is also an embodiment of advantage, in which with the pressure chamber, a control ramp is connected, which has a change in cross section for controlling the holding module on the pressure. It is thereby achieved that, as the pressure increases, a backflow can form, which causes an increase in pressure in the pressure chamber. On the other hand, a flow of the gas can be ensured with a correspondingly defined pressure, so that, for example, protective gas can be conducted via the intermediate piece to the pipe bend.

According to a further feature of the invention, a receiving module for the attachment of the pipe bend is provided via at least one fastening device, and for receiving retaining elements, in particular clamping balls formed. It is advantageous here, 2/37

AT13 190U1 2013-08-15 that conventional burners or pipe bends can be rebuilt and used in an automatic burner change system. Thus, the cost can be significantly reduced because such pipe bends can be used in several areas and not for each area independent pipe bends must be developed and manufactured. Also, the storage is simplified. By retrofitting commercial pipe bends and the flexibility is increased because different conversion kits or different recording modules for the different systems can be manufactured and used inexpensively. Thus, it is no longer necessary to produce the entire pipe bend with the connection system for a variety of systems, but only appropriate recording modules that are attached to the pipe bend.

The receiving module may be formed of a holding element and a positioning, wherein the holding element of an electrically conductive material, in particular brass, and the positioning of an electrically non-conductive material, such as hard plastic, is formed. This creates a modular design and can be used for a variety of tasks, the best possible materials, so that a high security in the attachment and a high quality for the positioning of the elbow is achieved.

Advantageously, the positioning element is provided with guide grooves for aligning the pipe bend in different positions. As a result, a wide variety of positions can be covered in angular pipe bends by simply rotating relative to the positioning. This significantly increases the flexibility of the system.

If a groove is arranged in the scope of the receiving module, engage in the clamping balls of a retaining ring of a torch exchange module in verbundem pipe bend with the burner replacement module, the space problems can be easily solved by the outward laying of the mounting mechanism and thus a variety of clamping balls for the Attachment can be used. In a known from the prior art arrangement of the clamping balls in the center, however, only a very small number of clamping balls can be used. Thus, the safety of the system can be significantly improved and the holding power of the pipe bend can be significantly increased. Also, it is thus possible to provide a retrofit module in the form of the receiving module, since the structure of the pipe bend can remain unchanged.

But also advantageous is an embodiment in which the torch exchange module, the clamping balls are associated with a cone which presses the clamping balls through an opening in the retaining ring outwardly for engagement in the groove on the receiving module via a spring element in a rest position. This creates a simple connection of the receiving module with the pipe bend and the intermediate piece or burner replacement module.

For the positioning of the pipe bend and a rotation of the pipe bend can be done with the holding element relative to the positioning, whereby a flexible adjustment of the orientation of the pipe bend is made possible. Also, for this purpose, corresponding locking elements between the holding element and the positioning can be arranged so that at each locked rotation a certain angle is adjusted. Thus, an adjustment can be made without teaching, since the individual positions are defined by the locking elements. Another possibility of targeted adjustment would also be possible such that by arranging a projection on the positioning element and a plurality of corresponding grooves on the holding element by loosening the two parts to each other and then twisting, the projection can be inserted in another groove.

Advantageously, a coding system is arranged on the positioning element, whereby it is achieved that in a manual exchange of a pipe bend the user can not use a wrong pipe bend. It must be ensured in such robotic systems that when exchanging a pipe bend is again used with the correct orientation, otherwise in automatic robot welding damage may occur due to collisions or the weld is performed at a different position than required, since the 3/37

isterreidiisci pitwiarot AT13 190U1 2013-08-15

Burner was rotated for example by 90 °. This can be prevented with a corresponding coding, since it is not possible to insert a burner or pipe bend with incorrect coding (except this was also carried out incorrectly) in the appropriate recording.

The coding system may be formed by bores or recesses and pins, whereby a simple and inexpensive production of the coding system is possible.

The object of the invention is also achieved by a welding torch mentioned above, in which a holding module for fixing the pipe bend or the burner holder is provided for automatically changing the pipe bend or the burner holder, which holding module between a fixing position, in which the pipe bend or the Burner holder is fixable, and a release position in which the pipe bend or the burner holder is releasable, is displaceable, wherein the displacement of the holding module is controllable via an extending line in the hose package, and the holding module in the burner holder or the hose package is integrated and with a receptacle is coupled for releasable connection with the pipe bend or the burner holder with a connection arranged thereon. The advantage here is that by the installation of the components for automatically changing the pipe bend or the burner holder no conversion is necessary, but at any time an automatic change process can be performed. Also, it can be taken to the design of the burner consideration.

The displacement of the holding module is preferably controllable via the line for supplying the welding torch with protective gas.

The holding module can be constructed according to the above description of the burner exchange module and be designed for use in the welding torch, in particular the hose assembly, the burner holder or the pipe bend.

Furthermore, the object is achieved by an above-mentioned pipe bend, in which is formed for automatically changing the pipe bend the connection for connection to a receptacle of a holding module, wherein the connection substantially by a cylinder having a groove extending over the circumference for receiving at least one clamping ball of the holding module is formed. It is advantageous in this case that any pipe bend for an automatic change system, as described above, can be used. Thus, not newly developed pipe bends for a variety of connection forms must be formed.

To form an anti-rotation can be arranged at the connection of the pipe bend a bore for receiving a corresponding pin, in particular a gas connection pin.

Moreover, the object of the invention is also achieved by a burner holder mentioned above, wherein for automatically changing the burner holder of the connection for connection to a receptacle of a holding module is formed, wherein the terminal has a groove extending over the circumference for receiving at least one clamping ball of Holding module has or arranged for automatically changing the burner holder a receptacle with a holding module, which holding module between a fixing position in which a pipe bend is fixed, and a release position in which the pipe bend is releasable, is displaceable, wherein the displacement of the holding module via a in the hose package extending line is controllable. The advantage here is that depending on the design of the burner holder without additional components or modification of the pipe bend or the burner holder itself can be easily changed automatically.

The holding module is preferably constructed according to the above description of the burner exchange module.

The object is also achieved by a hose package mentioned above, in which a retaining module for connection to the burner holder or the pipe bend is provided for automatically changing the burner holder or the pipe bend, which holding module 4/37 asterreidBsd! »Pitwiarot AT13 190U1 2013- 08-15 between a fixing position in which the burner holder or the pipe bend is fixed, and a release position in which the burner holder or the tube is releasable arc, is displaceable, wherein the displacement of the holding module is controllable via a line extending in the hose package. The advantage here is that in turn can be changed automatically without additional effort by simply controlling the holding module of the pipe bend or the burner holder.

The holding module is preferably constructed according to the above description of the burner exchange module and designed for use in the welding torch, in particular the hose assembly or the burner holder or the pipe bend.

Also, the object is achieved by a method described above, in which the pipe bend is connected to the burner holder or the burner holder with the hose package via a burner replacement module, and a holding module contained in the burner exchange module via a line extending in the hose package from a fixing position, in which the pipe bend or the burner holder is fixed, in a release position in which the pipe bend or the burner holder is released, is moved and after changing the pipe bend or the burner holder, the holding module back to the fixing position in which the pipe bend or the burner holder is fixed , is postponed.

Advantageously, the holding module is pneumatically moved by appropriate pressurization of a line for supplying the welding torch with inert gas between the fixing position and the release position. The advantage here is that any existing system can be converted without changing or changing the hose package for automatic burner replacement by using the burner replacement module in the form of an intermediate, for the control of an existing line for supplying the welding torch with the inert gas is used. Thus, the flexibility and weight of the hose package remains the same. The advantage here is that the change can be made without additional lines. Thus, the weight of the hose package does not increase and the flexibility is also fully maintained.

Finally, the invention is also achieved by a method described above, in which in the burner holder or in the hose package a receptacle with a holding module is arranged and the holding module via an extending in the hose package line from a fixing position, in which the pipe bend or the burner holder is fixed, in a release position in which the pipe bend or the burner holder is released, is moved, and after the change of the pipe bend or the burner holder, the holding module is moved back to the fixing position in which the pipe bend or the burner holder is fixed.

Preferably, the protective gas is used for displacement of the holding module.

Likewise, compressed air, which is introduced via a distributor in the line for supplying the welding torch with protective gas, can be used for displacement of the holding module and thus for changing the components of the welding torch.

The present invention will be explained in more detail with reference to the accompanying schematic drawings.

FIG. 1 shows a schematic representation of a welding device; FIG. FIG. 2 shows a schematic exploded view of a welding torch with a burner replacement module realized by means of an intermediate piece; FIG. Fig. 3 is a schematic representation of the welding torch with the intermediate piece of Figure 2 in the assembled state. Fig. 4 is a simplified sectional view through the intermediate piece in the

fixing position; 5/37

Fig. 5 Fig. 6 Figs. 7 to 12 Fig. 13 Fig. 14 Fig. 15 Fig. 15 Fig. 16 Fig. 18 Fig. 19 Fig. 20 Fig. 20 is a simplified sectional view through the intermediate piece in the release position; a schematic block diagram of a control of the Brennerwechselmoduls; schematic representations of a process for automatically changing the tube bend of a welding torch; a further embodiment with a pipe bend connected to the burner change module, in a simplified, schematic representation; a further simplified, schematic representation of the embodiment of Figure 13 with dissolved pipe bend. a simplified sectional view in the coupled state of FIG. 13; a further simplified sectional view with dissolved pipe bend of FIG. 14; a perspective view of a known from the prior art burner or elbow with arranged thereon nut; a further perspective view of the known from the prior art burner or pipe bend with dismantled union nut; a simplified exploded view with a receiving module according to the invention and the pipe bend; a perspective view of the burner or pipe bend with mounted receiving module; and another view of the burner or pipe bend with the mounted receiving module of FIG. 20.

In Fig. 1, a welding apparatus 1 or a welding system for a variety of processes or processes, such. MIG / MAG welding or TIG / TIG welding or electrode welding, double wire / tandem welding, plasma or soldering, etc., shown.

The welding device 1 comprises a power source 2 with a power part 3, a control device 4 and a power element 3 and the control device 4 associated switching element 5. The switching member 5 and the control device 4 is connected to a control valve 6, which in a Supply line 7 for a gas 8, in particular a protective gas, such as CO 2, helium or argon and the like, between a gas storage 9 and a welding torch 10 and a burner is arranged.

In addition, via the control device 4, a wire feeder 11, which is common for MIG / MAG welding, are controlled, via a supply line 12, a filler material or a welding wire 13 from a storage drum 14 and a wire reel in the Area of the welding torch 10 is supplied. Of course, it is possible that the wire feeder 11, as is known from the prior art, is integrated in the welding device 1, in particular in the base housing, and not, as shown in Fig. 1, is designed as an accessory.

It is also possible that the wire feeder 11, the welding wire 13 and the filler material outside the welding torch 10 supplies to the process site, for this purpose in the welding torch 10 preferably a non-consumable electrode is arranged, as usual in TIG / TIG welding is.

The current for establishing an arc 15 between the electrode and the 6/37

Welding wire 13 and a workpiece 16 is supplied via a welding line 17 from the power section 3 of the power source 2 to the welding torch 10, or the welding wire 13, wherein the workpiece to be welded 16, which is formed of several parts, via another welding line 18 also with the Welding apparatus 1, in particular with the power source 2, is connected and thus can be constructed via the arc 15 and the plasma jet formed for a process, a circuit.

For cooling the welding torch 10, the welding torch 10 with the interposition of a flow monitor 20 with a liquid container, in particular a water tank 21, are connected, whereby during commissioning of the welding torch 10, the cooling circuit 19, in particular one for in the water tank 21 arranged liquid used liquid pump is started and thus cooling of the welding torch 10 can be effected.

The welding device 1 further has an input and / or output device 22, via which the most varied welding parameters, operating modes or welding programs of the welding device 1 can be set or called up. In this case, the welding parameters, operating modes or welding programs set via the input and / or output device 22 are forwarded to the control device 4 and from this the individual components of the welding system or the welding device 1 are subsequently controlled or corresponding setpoint values for the regulation or control are specified.

Furthermore, in the illustrated embodiment, the welding torch 10 is connected via a hose package 23 to the welding device 1 or the welding system. In the hose package 23, the individual lines from the welding device 1 to the welding torch 10 are arranged. The hose package 23 is connected via a coupling device 24 to the welding torch 10, whereas the individual lines in the hose package 23 are connected to the individual contacts of the welding device 1 via connection sockets or plug connections. In order that a corresponding strain relief of the hose assembly 23 is ensured, the hose package 23 is connected via a strain relief device 25 to a housing 26, in particular to the base housing of the welding device 1. Of course, it is possible that the coupling device 24 can also be used for the connection to the welding device 1.

Basically, it should be mentioned that for the different welding methods or welding devices 1, such as, for example, TIG devices or MIG / MAG devices or plasma devices, not all of the previously named components must be used or used. For this purpose, it is possible, for example, that the welding torch 10 can be designed as an air-cooled welding torch 10.

FIGS. 2 to 6 show a detailed solution of a burner replacement module 27 for the welding torch 10, in which the welding torch 10 is formed from a pipe bend 28 and a burner holder 29.

The welding torch 10 is connected to perform a welding process via a hose package 23 with a welding device 1, as shown schematically in Fig. 1, and is preferably designed for use on a welding robot, in particular for attachment to the welding robot. For the sake of clarity, the representation of the welding robot and the attachment to it has been dispensed with. For this purpose, any known from the prior art possibility can be used. In particular, when used on a robot, it is advantageous if the welding torch 10 or individual components thereof can be replaced automatically. Preferably, the pipe bend 28 is exchanged and the burner holder 29, via which the welding torch 10 is attached to the robot, maintained.

In the illustrated embodiment, a burner replacement module 27 is shown in the form of an intermediate piece 30 for automatically changing the pipe bend 28, which is positioned or fastened between the burner holder 29 and tube sheet 28. The

In this case, the connecting piece 30 is designed in such a way that, when connected to the burner holder 29, a connection which is not automatically detachable, in particular a plug connection, is produced, whereas the connection of the tube bend 28 to the intermediate piece 30 is achieved by appropriate activation of the intermediate piece 30 automatically released and resolved. To change the pipe bend 28, the robot with the welding torch 10 in a torch change station, as described in more detail later, be positioned and a corresponding control of the intermediate piece 30 done so that the pipe bend 28 released and the intermediate piece 30 are released from the pipe bend 28 by a backward movement can. Subsequently, the robot positions the intermediate piece 30 to another pipe bend 28 which can be fixed on the burner holder 29 via the intermediate piece 30.

The main advantage of using the intermediate piece 30 for automatically changing a pipe bend 28 is that all welding torches 10, in particular pipe bends 28, which are also suitable for manual welding, can be used and no special pipe bends 28 for the robot and the automatic exchanges need to be made. The intermediate piece 30 can also be used between other components, for example between the hose package 23 and the burner holder 29, so that the burner holder 29 with the pipe bend 28 arranged thereon can be changed automatically via the intermediate piece 30. For this purpose, either the hose package 23 or the intermediate piece 30 has the fastening elements for fastening to the robot.

It is essential that for automatic exchange of the pipe bend 28 or the burner holder 29, the intermediate piece 30 is arranged with a holding module 31 for fixing the pipe bend 28 or the burner holder 29, which via a single line 32 for supplying the welding torch 10 with inert gas 8 is controllable (see Fig. 6).

The intermediate piece 30 has a receptacle 33 and a connection 34 preferably corresponding thereto, so that on one side of the intermediate piece 30 of the pipe bend 28 can be inserted with a connection 34 'arranged in the receptacle 33 and the intermediate piece 30 via the connection 34 can be connected to a arranged on the burner holder 29 recording. The intermediate piece 30 is designed to receive a component and at the same time to connect to a further component of the welding torch and thus can be used at any time between two components. The two connected via the intermediate piece 30 components of the welding torch 10 can be replaced automatically.

The coupled to the receptacle 33 holding module 31 is slidably formed along a longitudinal axis 35 of the intermediate piece 30 and fixed in the fixing position the pipe bend 28 or the burner holder 29 and are in the release position the pipe bend 28 or the burner holder 29 free for replacement. In Fig. 4, the intermediate piece 27 in the fixing position and in Fig. 5, the intermediate piece 27 is shown in the release position. The control of the displacement of the holding module 31 can via the line 32 for supplying the welding torch 10 with protective gas 8, as shown in Fig. 6, take place.

In the illustrated embodiment, the holding module 31 surrounds a core element 36, are arranged in the channels 37 for guiding the supplied via the line 32 protective gas 8. In the center of the core member 36, a bore 38 for conveying a welding wire 13 is further arranged. In this case, the bore 38 may be formed such that it can accommodate a wire core (not shown), in which the welding wire 13 is guided. The wire core preferably ends in the intermediate piece 30, so that in the transition region to the receptacle 33, a reduction of the diameter of the bore 38 can be made. This ensures that the welding wire 13 can be continuously promoted in the center of the hose package 23 via the burner holder 29, the intermediate piece 30 and the pipe bend 28.

So that the welding wire 13 can be conveyed into the bore 38, the connection 34 adjacent to the core element 36 also has a centrally extending corresponding bore 38, wherein in the transition region between the core element 36 and the 8/37

Terminal 34, a sealing ring 39 can be arranged. Preferably, a further sealing ring 39 'at the entrance of the bore 38 of the terminal 34 is arranged. The connection 34 further has a gas connection 40, which is connected to the channels 37 extending in the core element 36. So that the supplied protective gas 8 or gas can flow out of the core element 36, the channels 37 are guided in the region of the holding module 31 to the outside and the gas thus flows from the core element 36 in a circumferential cavity 41 and from there via a channel 42 into a pressure chamber 43. In the illustrated embodiment, the pressure chamber 43 is bounded on one side by the holding module 31 and on the other side by the adjacent receptacle 33.

The receptacle 33 is connected via a corresponding extension 44 with the arranged on the opposite side terminal 34 of the intermediate piece 30. About the individual elements, a housing 45 may be arranged. In the extension 44, the holding module 31 is movably mounted in the longitudinal direction. Via a spring element 46, which is supported on the terminal 34, the holding module 31 can be biased in the fixing position, as shown in FIG. 4 can be seen. It is thus achieved that the displaceable holding module 31 is held without activation in a defined position, namely the fixing position. This also ensures that the pipe bend 28 can not fall out of the intermediate piece 30, if no activation of the intermediate piece 30 takes place or a defect in the line 32 and thus a pressure drop occurs.

Furthermore, the receptacle 33 and the core element 36 has a receiving bore 47 for receiving a contact pin 48 formed on the connection 34. The diameter of the receiving bore 47 corresponds to the outer diameter 49 of the contact pin 48, so that a contact pin 48 arranged on the pipe bend 28 or on another component can be inserted into the intermediate piece 30, in particular into the receiving bore 47 of the seat 33 and the core element 36. Here, the receiving bore 47 is tuned to the length 50 of the contact pin 48.

In the transition region of the receiving bore 47 of the receptacle 33, a radially extending clamping cone 51 is arranged in the receiving bore 47 of the core element 36, in which at least one clamping ball 52 is mounted for free movement of the pipe bend 28 or the burner holder 29. The clamping cone 51 is designed such that it extends in the receiving bore 47, so that a part of the clamping balls 52 extends into the receiving bore 47 and thus reduces the diameter of the receiving bore 47 in this area.

The at least one clamping ball 52 is freely movably mounted in the clamping cone 51 and a clamping cone 51 associated clearance 53 is larger than the diameter of the clamping balls 52 so that the at least one clamping ball 52 can be pressed completely out of the interior of the receiving bore 4 7 , To fix the clamping ball 52, the holding module 31 has a cone 54, which pushes in the fixing position shown in FIG. 4, the clamping balls 52 in the clamping cone 51, so that the clamping balls 52 can not soft-out in the space 53. Thus, a plugged into the receptacle 33 with the contact pin 48 component of the welding torch 10 is fixed. If the holding module 31 is displaced in the longitudinal direction, in the direction of the connection 34 of the connected pipe bend 28, the cone 54 lifts off the clamping balls 52 and thus releases them, so that the clamping balls 52 can move into the free space 53 and that in the receptacle 33 plugged connection 34 of the component can be released, as shown in Fig. 5.

Simultaneously with a displacement of the holding module 31 in the longitudinal direction, a gas flow is interrupted in the receiving bore 47 and in a gas connection pin 55 arranged therefor. For this purpose, the pressure chamber 43 is connected via a supply channel 56 with a radially formed connecting channel 57. The connecting channel 57 is designed such that it can accommodate a substantially smaller volume of the protective gas 8 or a gas than can be supplied from the pressure chamber 43 via the supply channel 56, so that in the pressure chamber 43, a backwater can occur. The connection

Channel 57 opens into the free space 53 so that the protective gas 8 can flow from the free space 53 to the gas connection pin 55 and from this into a possibly connected component. Furthermore, the connecting channel 57 is arranged such that it is displaced during a displacement of the holding module 31 such that it is completely closed over a surface of the core element 36, so that no protective gas 8 can flow into the free space 53. As a result of the displacement of the holding module 31, the gas flow from the gas connection 40 to the gas connection pin 55 on the opposite side of the intermediate piece 30 is interrupted. For this purpose, the connecting channel 57 is arranged in the holding module 31, which can be closed by moving over the core member 36, whereby a backflow of the protective gas 8 is formed in the pressure chamber 43. If the connecting channel 57 is completely closed, the pressure in the pressure chamber 43 rises very rapidly. When a defined pressure is exceeded, the spring force of the spring element 46 is overcome and the holding module 31 is moved from the fixing position into the release position. It is essential that this only happens if too much gas is supplied. It is therefore desired a certain gas flow without pressure build-up in the pressure chamber 43 and only when a defined pressure is exceeded, a pressure build-up in the pressure chamber 43.

The gas connection pin 55 is formed corresponding to the gas port 40, so that when connecting a corresponding terminal 34 ', for example, the pipe bend 28, in the receptacle 33, the gas can flow through the gas connection pin 55 in the pipe bend 28. On the pipe bend 28 and on the burner holder 29 therefore a receptacle 33 of the holding module 31 corresponding terminal 34 'is arranged, which in particular at the contact pin 48, a circumferentially extending groove 58' for receiving the at least one clamping ball 52 of the holding module 31 and at the same time a gas connection 40 takes place. In the illustrated embodiment, the gas connection pin 55 simultaneously serves as anti-rotation, so that the pipe bend 28 is always inserted in the same position. Of course, projections, indentations or the like can be used for a twist protection.

For a good current transition is achieved, a contact groove 59 is disposed in the receptacle 33 of the intermediate piece 30, in which a contact element 60 is inserted, wherein individual spring elements protrude into the interior of the receptacle 33, which deforms upon insertion of a terminal 34 ' so that they make good contact with the terminal 34 '. In order for energy to be transferred from one side to the other side of the intermediate piece 30, the individual elements in the intermediate piece 30, in particular the connection 34 and the receptacle 33, are made of electrically conductive material, in particular copper or a copper alloy, whereas the housing 45 is preferably electrically is formed non-conductive, so that when touching the spacer 30 no electric shock can occur. Since the receptacle 33 is connected via the extension 44 to the terminal 34, the holding module 31 and / or the core element 36 may be formed of electrically non-conductive material.

Due to the special design of the intermediate piece 30, the control, in particular via the line 32 for supplying the welding torch 10 with inert gas 8, take place. Thus, no electrical lines or additional lines for controlling the intermediate piece 30 are necessary, since the line used for the gas supply 32 is used and the control is effected by corresponding pressure change in the line 32. For the gas supply of the pipe bend 28, the protective gas 8 or another gas is supplied with a customary for the welding pressure of 1 to 5 bar and flows from the line 32 into the gas port 40 and through the channels 37 and the channel 42 into the pressure chamber 43rd and from the pressure chamber 43 via the supply channel 56 and the connecting channel 57 in the free space 53 and from there via the gas connection pin 55 in the pipe bend 28. In this case, all the gas ducts are dimensioned such that a permitted for the welding process pressure can be conveyed without causing the Holding module 31 is moved over the flow pressure. For this purpose, sufficient leeway is preferably left, so that a reliable supply of the welding process with the protective gas 8 is possible. Through different spring elements 10/37

An adjustment to the pressure conditions can be made with different spring force since the retaining module 31 is held in the fixing position via the spring element 46 and only when the spring force is exceeded by corresponding pressure in the pressure chamber 43 Holding module 31 is moved against the spring force in the release position. Thus, if the pressure of the protective gas 8 is increased or another gaseous or liquid medium with correspondingly high pressure, in particular a pressure above 20 bar, supplied via the line 32, then the protective gas 8 flows through the gas port 40, the channels 37 and the channel 42 in the pressure chamber 43. Due to the dimensioning of the connecting channel 57, not all the gas can flow through the connecting channel 57, so that the gas accumulates in the pressure chamber 43 and builds up more and more pressure. If the pressure in the pressure chamber 43 exceeds the spring force of the spring element 46, the holding module 31 is displaced in the longitudinal direction counter to the spring force of the spring element 46, so that now the connecting channel 57 is closed via the core element 36 and thus the pressure rises very rapidly in the pressure chamber 43 and holding the holding module 31 in position, since no more gas can flow out, as shown in Fig. 5. By moving the holding module 31, the clamping balls 52 can now move freely and the pipe bend 28 can be pulled without resistance from the intermediate piece 30. However, so that the holding module 31 is moved back to the starting position, it is only necessary to bleed the line 32 briefly, so that the pressure in the pressure chamber 43 can degrade through line 32 and thus the holding module 31 via the spring element 46 back to the starting position is moved.

In Fig. 6 is a schematic representation of the control via a common line 32 is shown. In this case, the supply of the welding torch 10 and the activation of the holding module 31 contained in the intermediate piece 30 are carried out via a common line 32 in the hose package 23. Preferably, in the welding device 1, the line 32 is divided by a distributor 61, wherein a line 62 with the supply of inert gas 8, in particular with the gas storage 9, in which the protective gas 8 is stored, and the further line 63 is connected to a compressed air system 64 , Furthermore, a time-controlled valve 65, in particular a check valve, is arranged in the line 62, so that venting via the line 62 can be carried out over a predeterminable period of time, when the welding torch 10 and thus the intermediate piece 30 are connected to the compressed-air system 64. Such venting is necessary because at a pressurization of the intermediate piece 30 via the compressed air system 64, the holding module 31 is moved with a pressure above 20 bar and thus the outputs are sealed, so that the pressure in the pressure chamber 43 can not escape. After a corresponding change operation of a component, therefore, the pressure chamber 43 must be briefly vented, so that the holding module 31 is displaced again via the spring element 46 into the fixing position.

In the illustrated embodiment of FIG. 6, a variant is shown in which two different systems, in particular a gas storage 9 for the protective gas 8 and a compressed air system 64 for high-pressure compressed air, are used. In this case, the supply of the welding torch 10 with inert gas 8 from the gas reservoir 9 via the line 62 and the manifold 61 to the line 32 and from this via the intermediate piece 30 to the pipe bend 28 and to the weld. This gas supply is preferably carried out with a pressure between 1 bar and 5 bar, wherein the flow channels in the intermediate piece 30 are designed accordingly that a secure supply without displacement of the holding module 31, ie without pressure build-up in the pressure chamber 43 is ensured.

So that now a change of a component, in particular of the pipe bend 28, can be performed by a control device, in particular the control device 4 of the welding device 1, the protective gas supply via the gas storage 9 is deactivated and simultaneously activated the compressed air system 64. Thus, compressed air is now supplied via the line 63 with a pressure above 20 bar to the distributor 61 and forwarded via the line 32 into the intermediate piece 30. Since the flow channels in the intermediate piece 30 are not dimensioned for such promotion, forms a back pressure in the pressure chamber 43 (see FIGS. 4 and 5), whereby the holding module 31 upon reaching a higher pressure than the spring force 11/37

AT13 190U1 2013-08-15 of the spring element 46 is displaced and thus the connecting channel 57, which forms the connection of the pressure chamber 43 to the gas pin 55, is sealed. At the same time in the line 62, the valve 65, in particular the check valve, locked so that the compressed air can not escape. The robot can now carry out an automatic change operation with the retracted over the compressed air holding module 31. If the changing process is completed, the retaining module 31 must be moved back into the fixing position for fixing the component, in particular the pipe bend 28. For this purpose, the valve 65 is now actuated so that it is opened over a defined presettable period of time and thus a venting of the pressure chamber 43 is performed. Due to the pressure drop in the pressure chamber 43, the holding module 31 is moved back into the fixing position via the spring force of the spring element 46, as a result of which the connecting channel 57 is also released again. Thus, the remaining compressed air can flow out via the connecting channel 57. After expiration of the preset time period for the valve 65, the gas supply via the gas storage 9 is activated again, so that the pipe bend 28 is supplied with inert gas 8 again.

Of course, instead of two separate systems described above, a single system, namely the gas storage 9 for the protective gas 8 for displacement of the holding module 31 may be used. For this purpose, it is only necessary that the pressure of the protective gas 8 is raised to a certain size for the change process, so that a back pressure and thus a pressure build-up in the pressure chamber 43 can form. During the welding process, the pipe bend 28 is supplied with the protective gas 8 at a lower pressure, which can flow through the intermediate piece 30 without backflow, via the line 32.

In FIGS. 7 to 12, a procedure for automatically changing a pipe bend 28 in a burner tray 66 is described, as this can be carried out in practice. For better clarity, the robot was not shown, but the movements of the robot indicated by arrows.

The intermediate piece 30 is arranged between the pipe bend 28 and the burner holder 29, wherein the pipe bend 28 are secured to the receptacle 33 and the intermediate piece 30 via the terminal 34 to the burner holder 28. The burner holder 28 is attached to the robot via a robot mounting member 67, so that a welding process can be performed on the robot. After completion of a welding process, the protective gas 8 is switched off and the robot moves with the welding torch 10 in the burner tray 66, as shown schematically in Fig. 7.

In the burner tray 66 a plurality of receiving elements 69 are arranged on a preferably spring-mounted shelf 68. The shelf 68 is mounted on a stand 70, wherein it is essential that the shelf 68 is not rigidly attached to the stand 70. By a spring-mounted and fixed shelf 68 is namely achieved that when positioning a pipe bend 28 in a receiving element 69 this easily auswei-chen and thus inaccuracies in the positioning can be compensated. In order to ensure a secure hold of the pipe bends 28 in the receiving elements 69, spring-mounted fastening elements 71 are arranged in the receiving elements 69 in the form of balls or detent balls, which project into the receiving elements 69 over a defined area. Corresponding thereto are on the pipe bend 28 guide grooves 72, as shown in Fig. 2, arranged with recesses 73 so that when positioning, so inserting the pipe bend 28 in the receiving element 69, the fasteners 71 are guided in the guide groove 72 and then into the recess 73rd engage, so that a defined position of the stored pipe elbows 28 is created. Preferably, the receiving elements 69 are formed in a circle with a cutout 74 so that the pipe bend 28 can be introduced and stored in the cutout. Different forms of pipe elbows 28 may be positioned in the individual receptacles 69 that may be used via an automatic changing operation, as described below.

When a welding torch 10 has been positioned by the robot in the torch rest 66, in particular, a receiving element 69, as shown in Fig. 8, in place of the shielding gas, in particular, 12 & 37 < OTeid 5ChCS fiSHSiSTSt AT13 190U1 2013-08-15 8 for the welding process, the line 32 connected to the compressed air system 64 and injected compressed air into the line 32. Due to the controlled narrow cross-section in the region of the cone 54 of the intermediate piece 30, a backflow forms in the pressure chamber 43, which begins to move the holding module 31 as a piston back against the spring force of the spring element 46. Connected to the pressure chamber 43 is a control ramp which has a cross-sectional change for controlling the holding module 31 via the pressure. In this case, the cross section of the connecting channel 57 is additionally narrowed by the backward movement, until finally the front O-ring on the holding module 31 completely seals the connecting channel 57 and the holding module 31 is pressed completely backwards. In this rear position, ie the release position of the holding module 31, the clamping balls 52 can move freely and the pipe bend 28 can be released (see Fig. 5).

Then the robot moves vertically upwards and thus separates the pipe bend 28 from the burner holder 29, so that the pipe bend 28 remains in the burner tray 66, as shown in Fig. 9. The robot then picks up the desired pipe bend 28 by the robot positioning the intermediate piece 30 over the next pipe bend 28, see Fig. 10, moving the intermediate piece 30 in the direction of the pipe bend 28, as shown schematically in Fig. 11, and then the intermediate piece 30 sits on this, as shown in Fig. 12. Subsequently, the compressed air is switched off and the line 32 vented. As soon as the pressure chamber 43 is depressurized, the holding module 31 moves forward again into the fixing position. In the fixing position, the clamping balls 52 of the holding module 31 are pushed back inwards and the pipe bend 28 is fixed, since the clamping balls 52 are pressed into the groove 58 on the contact pin 48. At the same time the path for the shielding gas 8 is released again, i. the line 32 in turn connected to the inert gas supply. Finally, the robot leaves the burner tray 66 with a new pipe bend 28.

In principle, it should be mentioned that in the embodiment described above, the line 32 is used for the supply of the welding torch 10 with inert gas 8 and at the same time for the control of the holding module 31. However, it is possible that the holding module 31 is controlled via a pneumatic or hydraulic line to release the pipe bend 28 or the burner holder 29, ie, that an extra line for the control of the holding module 31 is used in the hose package 23 or in the region of Hose package 23, so outside, preferably around or along the hose assembly 23, may be arranged to extend. However, a structural adaptation of the channel guide is necessary so that a secure gas supply to the gas and a control and displacement of the holding module 31 is possible. The holding module 31 is thus controlled via a pneumatic or hydraulic line to release the pipe bend 28 or the burner holder 29 accordingly.

Also can be effected by the arrangement and control of electromagnets, a displacement of the holding module 31 in the longitudinal direction.

In the solution according to the invention, it is also possible that the individual parts of the intermediate piece 30 on different components, such as the welding torch 10, the pipe bend 28, the burner holder 29, the hose package 23, etc., on or are installed, so a direct coupling of the components without spacer 30 is possible.

In this case, the welding torch 10 is formed for example from at least one pipe bend 28 and a burner holder 29 and connected to perform a welding process via a hose package 23 with a welder 1, wherein arranged in the hose package 23 lines for supplying the welding torch 10 with energy and inert gas 8 and the welding torch 10 is preferably designed for use on a robot, in particular for attachment to the robot. For automatically changing the pipe bend 28 or the burner holder 29, a holding module 31 for fixing the pipe bend 28 or the burner holder 29 is arranged, wherein the holding module 31 via a pneumatic or hydraulic line 32 to release the pipe bend 28 or the burner holder 29 can be controlled. 13/37

The tube bend 28 may be formed, for example, such that a connection 34 'corresponding to the holding module 31 is arranged on the tube bend 28, wherein the connection 34' is arranged on the tube bend 28 '. a circumferentially extending groove 58 'for receiving the at least one clamping ball 52 of the holding module 31 has. To prevent rotation, a bore for receiving a gas connection pin 55 may be arranged.

Usually, the burner holder 29 is equipped for a welding torch 10 according to that on the burner holder 29 a corresponding to the holding module 31 terminal 34 'is arranged, wherein the terminal 34' has a circumferentially extending groove 58 'for receiving the at least one clamping ball 52 of the holding module 31 or on the burner holder 29 for automatically changing the pipe bend 28, a holding module 31 is arranged for fixing the pipe bend 28, wherein the holding module 31 via a pneumatic or hydraulic line 32 to release the pipe bend 28 or the hose package 23 can be controlled.

Thus, it is for example also possible that a hose package 23 for a welding torch 10, is formed such that for automatically changing the burner holder 29 or the pipe bend 28, a holding module 31 for fixing the burner holder 29 or the pipe bend 28 is arranged, which Holding module 31 via a pneumatic or hydraulic line 32 to release the pipe bend 28 or the burner holder 29 is controllable.

In summary, it can be said that, on the one hand, a method is carried out for a burner replacement module 27, in which a welding torch 10, consisting of a pipe bend 28 and a burner holder 29, is fastened to a robot, wherein for changing the pipe bend 28, the robot Welding torch 10 is positioned in a torch exchange module 27 or a torch change station, whereupon a change of the pipe bend 28 is performed via a defined sequence, wherein in the burner holder 29, a holding module 31 is arranged, and by appropriate pressurization to a line 32 for supplying the welding torch 10 with Shielding gas 8 in the burner holder 29 integrated holding module 31 is driven so that a longitudinal movement of the holding module 31 is triggered and the pipe bend 28 can be separated from the burner holder 29. On the other hand, a method for a burner change system can be carried out, in which a welding torch 10, consisting of a pipe bend 28 and a burner holder 29, is attached to a robot, wherein for changing the pipe bend 28, the robot 10, the torch 10 in a torch exchange module 27 and Burner exchange station is positioned, whereupon a change of the pipe bend 28 is performed via a defined sequence, wherein between the pipe bend 28 and the burner holder 29 a burner replacement module 27 is arranged in the form of an intermediate piece 30, and by appropriate pressurization of a line 32 for supplying the welding torch 10 with Shielding gas 8 in the intermediate piece 30 integrated holding module 31 is driven, so that a longitudinal movement of the holding module 31 is triggered and the pipe bend 28 can be separated from the burner holder 29. In such a design of the burner tray 66, both a horizontal and vertical arrangement of the receiving elements 69 can be used, since the pipe bends 28 can be removed in the receiving elements 69 only with little effort.

In such a system with intermediate piece 30 or with integrated in the individual components of the welding torch 10 parts accessibility is not significantly affected, so that for each welding process, the desired pipe bend 28 can be selected for the necessary performance and geometry. Also, a very high flexibility is achieved because any number of welding torches 10 can be used, since one is not, as known from the prior art, limited by a carousel or the like, but a plurality of such receiving elements 69 can be concentrated or distributed. If a previously described burner tray 66 is used, a space-saving design is achieved, which can also be integrated in a welding cell. Thus, the availability of the welding cell can be increased by a high factor, since the load on the 14/37

AT13 190U1 2013-08-15 different welding torches 10, in particular pipe bends 28 can be divided. A particular advantage lies in the fact that no own welding torches 10 are required for the automatic change, but proven welding torches 10, in particular known pipe arc technologies can be operated on the change system or on standard systems and vice versa.

It is essential in the illustrated system that thereby only a minimal interference contour is formed and the accessibility is maintained. It is also advantageous that a minimum cycle time is guaranteed. In order to meet the safety requirements, it is advantageous if, at pressure drop or in the pressureless state, the components used are stretched or held and only to release the components used compressed air or a corresponding pressure is needed.

In Figs. 13 to 21, another embodiment of an automatic torch changing system is shown, wherein for the same parts of the previously described embodiment of Figs. 1 to 12, the same reference numerals are used. It is also possible that partial features or feature or feature combinations of FIGS. 1 to 12 described above can be adopted in the new exemplary embodiment of FIGS. 13 to 21 or of the exemplary embodiment of FIGS. 13 to 21 in the exemplary embodiments 1 to 12 can be applied.

A detailed description of the control process for releasing the pipe bend 28 or for activating the burner replacement module 27 is dispensed with, since this can be taken from the exemplary embodiment already described above. It is only the structural difference of the embodiment explained in more detail, it being noted that the basic concept of control to release the clamping balls 52 by increasing the gas pressure above a defined threshold or by applying the same amount of compressed air remains the same. For this purpose, the clamping balls 52 are in turn associated with a cone 54 which presses on the spring element 46 in the rest position the clamping balls 52 through an opening 76 in the retaining ring 75 to the outside or the clamping ball 52 fixed in the opening 76, wherein the force of the clamping balls 52 from Center outwardly toward the outer periphery of the retaining ring 75 acts. Thus, in the assembled state of the burner exchange module 27 with the pipe bend 28, as shown in FIGS. 13 and 15, the pipe bend 28, in particular the necessary for receiving the clamping ball 52 groove 58, the clamping balls 52 not against the cone 54, in particular against Spring force of the spring element 46, press inwardly into the retaining ring 75, whereby the pipe bend 28 in turn on the burner replacement module 27, in particular the clamping balls 52, is held. To release the clamping balls 52, it is necessary that in the pressure chamber 43, a pressure build-up against the spring force, so that the cone 54 is displaced against the spring force in the longitudinal direction. By the displacement of the holding module 31 with the cone 54 by increasing the pressure is achieved by the holding module 31, a gas flow channel is covered, so that a faster pressure build-up takes place in the pressure chamber 43 and the force to be exerted is increased by the pressure. At the same time, it is achieved by sealing the channel that the pressure can not be reduced automatically and the holding module 31 is automatically held in the pressure chamber 43 by the built-up pressure. To reduce the pressure and thus to return the holding module 31 in the rest position, a venting of the gas line via a valve is performed, so that in the rest position, the pressure chamber 43 is depressurized or flows through the protective gas pressure for the weld. After adjustment of the cone 54, the clamping balls 52 can slide or be pressed into the free space 53, so that the fixation of the pipe bend 28, in particular the engagement of the clamping balls 52 in the groove 58, is repealed, as shown in FIG. 16 can be seen. It can also be said that when changing the pipe bend 28, the weight of the pipe bend 28 presses the clamping balls 52 into the free space 53.

Furthermore, by the longitudinal displacement of the cone 54 - corresponding to the arrow shown in Fig. 16 - in particular the entire holding module 31 with the cone 54, two things can be achieved. First, the clearance 53 is increased, so that the clamping balls 52 in 15/37

AT13 190U1 2013-08-15

Secondly, the pipe bend 28 is pushed away from the burner replacement module 27 by the advancement of the cone 54, and the holding module 31, so that the pipe bend 28 can be easily separated or stored. As can be seen in FIG. 16, therefore, the cone 54 or the holding module 31 is pushed beyond the end face of the holding ring 75 with a corresponding pressure build-up in the pressure chamber 43, so that the flat fitting pipe bend 28, as shown in FIG. 15, is replaced by the burner replacement module 27 is pushed away and thus easily filed.

The control of the holding module 31 can basically be done in two different ways. On the one hand, a single gas channel can run through the burner replacement module 27, as is the case in FIGS. 1 to 12. In this case, the gas channel is designed such that a trouble-free flow up to a predefined pressure is possible and when this pressure is exceeded, a pressure build-up in the pressure chamber 43 takes place, so that the holding module 31 is moved.

On the other hand, it is possible, as shown in Figs. 15 and 16, that two different channels, in particular a main channel 91 and a secondary channel 92, are used, the first for the supply of the pipe bend 28 and the second for driving the Holding module 31 is used. The main channel 91 extends from one side of the burner exchange module 27 from the gas port 40 preferably linearly parallel to the longitudinal center axis of the burner exchange module 27. In the main channel 92, a valve 93 is arranged, which blocks when a defined pressure, which is electronically or manually adjustable, for example , The height of the barrier pressure is preferably defined such that it is above the normal gas supply pressure for a welding process, for example from 5 to 8 bar. Upon actuation of the main channel 91 with a pressure above 8 bar, the valve 93 closes and thus no gas flow takes place on the opposite side of the main channel 91 more. By closing the main channel 91, the pressure is conducted via a connecting channel 94 into the secondary channel 92 with a further release and venting valve 95. Preferably, this release and vent valve 95 is activated when exceeding a further predetermined pressure, whereby a release of channels 37 and 42 takes place and thus abruptly increases the pressure in the pressure chamber 43. Thus, it is achieved that after closing the valve 93, a pre-pressure in the secondary channel 92 is constructed so that upon further increase the release and vent valve 95 turns on and a rapid or abrupt pressure build-up in the pressure chamber 43 is achieved, whereby the holding member 31 quickly is moved. It can therefore be said that upon activation of the valve 93, the gas 8 can flow via the connecting channel 94 into the secondary channel 92 and from there via the release and venting valve 95 into the channels 37 and 42, from where it then into the pressure chamber 43 arrives. Thus, now a corresponding pressure builds up in the pressure chamber, whereby at a correspondingly high pressure, the holding module 31 is moved and held in the appropriate position.

For the pressure reduction and thus for the provision of the holding module 31, it is possible that the pressure is further increased above another threshold, whereby the release and vent valve 95 is activated for venting and the pressure from the pressure chamber 43 and the main channel 91 degrades or discharges or that a direct control to open the release and vent valve 95 takes place, whereby the pressure reduction is initiated.

As shown in FIGS. 13 to 16, that is, the external structure compared to the described embodiment of FIGS. 1 to 12 executed vice versa. The clamping balls 52 no longer act in the direction of the center, but in the direction of the outer circumference of the retaining ring 75, but the clamping balls 52 are in turn arranged in the burner replacement module 27. The advantage of this arrangement is that the retaining ring 75 can be formed substantially larger for the clamping balls 52 and thus more clamping balls 52 can be used distributed around the circumference and thus increases the holding force and the exact fit or position can be improved. Another advantage is that the attachment of the welding torch 10 with an additional part in the form of a receiving module 77, as described later in detail, can take place, so that commercial welding torch 16/37

AT13 190U1 2013-08-15 10 can be used, but also a one-piece design of the welding torch 10 is possible. Basically, it should be mentioned that the welding torch 10, in particular the pipe bend 28 and the burner holder 29 (not shown), for receiving and guiding the welding wire 13, which is conveyed in a so-called wire core, for conveying cooling liquid in cooling lines and for supplying an inert gas is formed in a gas line, wherein not always all lines must be used or arranged, as is the case for example in a gas-cooled burner. For this purpose, the pipe bend 28 have corresponding connections, in particular a wire feed connection 78, two cooling line connections 79 and the gas connection 40, whereby a corresponding receiving device 80, in particular bores with or without sealing rings, are arranged correspondingly to the burner holder 29 or the burner exchange module 27 arranged therebetween. Thus, if the pipe bend 28 is connected to the burner replacement module 27, then the media or the welding wire 13 can be fed via the burner replacement module 27 or directly from the burner holder 29, without the media escaping. For safety, it is mentioned that those connections that carry liquids or gas are designed in such a way that no liquid or gas escapes when disconnecting. For this purpose, automatic or controllable valves or other necessary elements, as already known from the prior art, are arranged in the lines or the individual components. For example, check valves may be arranged in the channels or lines, so that the liquid or the gas is held in the lines during decoupling. The connections, in particular the wire delivery connection 78, cooling line connection 79 and the gas connection 40, are arranged in the center. To these connections of the burner exchange module 27, the holding module 31 is arranged according to its end face has an increase on the circumference, which engages for releasing the pipe bend 28 in a recess 81 of the receiving module 77 on the pipe bend 28. As can be seen in the illustrations, the receiving module 77 now has a circumferentially integrated groove 58 which also extends around the circumference and in which the clamping balls 52 can engage. The groove 58 is thus arranged along the outer periphery of the receiving module 77 and thus has the widest possible distance from the center.

To show the use of a commercially available welding torch 10 with a cap nut 82 arranged for attachment, a welding torch known from the prior art is shown in FIGS. 17 and 18, which in this embodiment can not be connected to the automatic torch changing system , Although the welding torch has the corresponding connections in the center, the receiving module 77 with the groove 58 is missing for connection to the torch exchange module 27. However, this can be converted. Usually, in a commercial welding torch, the pipe bend 28 is screwed over the union nut 82 with the burner holder 29 or a robot mount, so that the media, in particular the cooling liquid and the gas 8, can be safely conveyed into the pipe bend 28. For use of such a welding torch 10, it is now necessary to remove the union nut 82, as shown in Fig. 18. Thus, it is possible to attach corresponding attachments on the main body of the pipe bend 28.

For this purpose, the receiving module 77 is fastened to the body of the pipe bend 28 for the automatic burner changing system. The receiving module 77 is preferably formed from two parts, namely a holding element 83 and a positioning element 84. The multi-part design has the advantage that, for example, the holding element 83 can be made of an electrically conductive material, in particular brass, and thus has a high strength, whereas the positioning element 84 of an electrically non-conductive material, in particular hard plastic, for electrical insulation of the holding element 83 may exist. Of course, it is possible to form the receiving module 77 in one piece or more than just two parts, wherein the groove 58 is arranged accordingly, in which the clamping balls 52 can engage. Preferably, according to FIG. 16, the holding element 83 is designed to receive the holding ring 75, so that the holding element 83 has a corresponding recess. This recess is formed with a web extending along the circumference, in which the groove 58 is integrated. The recess 58 is preferably on the end face of the 17/37

Tearing the retaining element 83 arranged. As a result, a projection with respect to the end face of the pipe bend 28 is created by the groove 58 being arranged such that it is aligned in the direction of the center, ie 90 ° to the longitudinal axis, and thus forms a corresponding U-ring.

As can be seen in the exploded view in FIG. 19, the holding element 83 is pushed over the pipe bend 28 starting from a gas nozzle 85 in the direction of an arrow 86, wherein a fastening device 87, for example in the form of threaded bores, on the holding element 83, is arranged. Corresponding notches, recesses, etc. are provided on the front side, so that a flat closure with the pipe bend 28 is achieved when sliding over. About screws (not shown), the retaining element 83 is rotatably attached to the pipe bend 28. For the sake of order, it is mentioned that also on the pipe bend 28 corresponding fastening bores can be provided into which a screw or a pin can be inserted in order to position the retaining element 83 and fasten it. Also, other fastening systems, such as a clamped connection, plug-in / snap-in connection, etc. may be used.

After the holding member 83 is positioned and fixed, the positioning member 84 is pushed over the holding member 83, wherein, as shown in the sectional views, the interior of the positioning member 84 is formed corresponding to the outer shell of the holding member 83. Preferably, the positioning element 84 completely encloses the outer contour, so that when the pipe bend 28 is fixed, no electric shock can occur due to contact. The attachment can in turn via a corresponding fastening device 87, for example, with holes and threads done. Again, for the sake of order, it should be mentioned that for the attachment of the retaining element 83 and the positioning element 84, other fastening options, such as adhesive or soldered joints, etc. can be used. Also channels or lines for gases or liquid media, as well as electrical lines can be integrated in the receiving module 77, which are automatically contacted when pushing the receiving module 77 or manually a connection must be made. In this way, corresponding sensors for detecting the position or a firm and correct seat can be used on the burner replacement module 27.

It should also be mentioned that the receiving module 77, in particular the positioning element 84, is designed for further tasks in the described automatic burner changing system. For the storage in the storage plate 68 with the individual receiving elements 69, in turn, the guide grooves 72 are arranged with the recesses 73 for latching of holding elements, in particular resilient pressure elements, as described in FIGS. 1 to 12.

One task relates to the orientation of the pipe bend 28. For this purpose, the positioning element 84 is provided with guide grooves 88, so that the pipe bend 28 can be aligned in different positions. This allows the pipe bend 28 in accessibility problems, for example, by various sensors, twisted in the burner magazine or the burner tray 66 are stored. The pipe bends 28 are usually arcuate, so by turning the pipe bend 28 for example 90 ° shows this in a different direction and thus appropriate accessibility problems can be solved. Due to the multi-part design an adaptation is easily possible, since only the fastening device 87 has to be solved for the positioning element 84, so that the pipe bend 28 together with holding elements 83 attached thereto can be rotated. To position the pipe bend 28, the pipe bend 28 is rotated with the holding element 83 relative to the positioning element 84, so that the positioning element 84 remains in the same position with all the integrated components, such as grooves, guides, bores, etc. arranged thereon. In order to achieve an exact adjustment of the orientation of the course of the pipe bend 28, a corresponding gauge can be stopped, which is inserted into the corresponding guide groove 88 and then the pipe bend 28 is rotated accordingly. By tightening the positioning member 84, the selected position can be fixed. This is also achieved in an advantageous manner that a standard burner for the different 18/37

& * »« id> AT13 190U1 2013-08-15 AT13 190U1.

Another object for the receiving module 77 is to prevent incorrect positioning or storage in the burner tray 66. For this purpose, a coding system 89 is arranged on the positioning element 84, by which it is prevented that when exchanging the pipe bend 28 or a faulty storage of the robot this can not be stored by the coding system 89 in the individual receiving elements 69. Only with a match of the coding system 89 on the pipe bend 28 or on the positioning elements 84 and the burner tray 66 a storage in the receiving elements 69 is possible. This prevents, for example, that a wrong pipe bend 28 can be stored in a receiving element 69 during a burner change by an operator.

The coding system 89 is formed in a simple form, for example, by bores 90 or recesses and pins: The Brennerablage 66 a corresponding bolt circle for common coding of burner or pipe bend 28 and burner tray is created, whereby when using different burner geometries and power classes incorrect loading of the burner magazine is prevented. The respective burner or the position element 84 can be deposited by applying pins in the tray or by closing holes only in the provided burner tray 66. Of course, other coding systems 89 can be used as pins and holes, such as rectangular projections and depressions, different diameter rings or rings etc. Preferably, therefore, mechanical systems are attached, since this prevents that in the de-energized state or in the off state of the system at a fitting with elbows 28 the staff can use no wrong burner or pipe bends 28. The storage of the pipe bends 28 in the burner tray 66 is such that a locking of the pipe bend 28 by means of resilient plungers (not shown), so-that the pipe bend 27 is held securely and locks in a defined position. 19/37

Claims (29)

AT 13 190 U1 2013-08-15 Claims 1. burner replacement module (27) for a welding torch (10), which is designed in particular for attachment to a welding robot, which welding torch (10) at least one pipe bend (28) and one with the pipe bend ( 28) connectable burner holder (29), which burner holder (29) via a hose package (23) with therein extending lines for supplying the welding torch (10) with energy and protective gas (8) is connectable to a welding device (1), characterized in that an intermediate piece (30) for connecting the pipe bend (28) with the burner holder (29) or the burner holder (29) with the hose package (23) is provided for automatically changing the pipe bend (28) or the burner holder (29), which intermediate piece (30) comprises a holding module (31) which is fixable between a fixing position in which the pipe bend (28) or the burner holder (29) and a release position, in which de The pipe bend (28) or the burner holder (29) is releasable, is displaceable, wherein the displacement of the holding module (31) in the hose package (23) extending line is controllable, and the intermediate piece (30) has a receptacle (33) for releasable Connection to the pipe bend (28) or the burner holder (29) and a connection (34) for connection to the burner holder (29) or the hose package (23), wherein the receptacle (33) is coupled to the holding module (31). 2. burner replacement module (27) according to claim 1, characterized in that the displacement of the holding module (31) via the line (32) for supplying the welding torch (10) with protective gas (8) is controllable. 3. burner replacement module (27) according to claim 1, characterized in that the receptacle (33) essentially by a cylindrical bore and a receptacle for receiving connection (34 ') on the pipe bend (28) or on the burner holder (29) substantially by a cylinder is formed with a circumferentially extending groove (58 ') for receiving at least one clamping ball (52) of the holding module (31). 4. burner replacement module (27) according to claim 3, characterized in that the holding module (31) has a cone (54) which in the fixing position, the at least one clamping ball (52) in the groove (58 ') of the terminal (34') the pipe bend (28) or the burner holder (29) fixed and releases in the release position the at least one clamping ball (52). 5. burner replacement module (27) according to one of claims 1 to 4, characterized in that the holding module (31) via a spring element (46) is held in the fixing position. 6. burner replacement module (27) according to one of claims 1 to 5, characterized in that in the intermediate piece (30) with the conduit (32) for the protective gas (8) connectable pressure chamber (43) is arranged, wherein by building a pressure in the pressure chamber (43), the holding module (31) against the spring element (46) is displaceable in the release position. 7. burner replacement module (27) according to claim 6, characterized in that with the pressure chamber (43) is connected to a control ramp having a change in cross section for controlling the holding module (31) via the pressure. 8. burner replacement module (27) according to one of claims 1 to 7, characterized in that a receiving module (77) for fixing the pipe bend (28) via at least one fastening device (87) is provided, and for receiving retaining elements, in particular clamping balls ( 52) is formed. 9. burner replacement module (27) according to claim 8, characterized in that the receiving module (77) consists of a holding element (83) and a positioning element (84) is formed, wherein the holding element (83) made of an electrically conductive material, in particular brass, and the positioning element (84) is formed of an electrically non-conductive material, such as hard plastic. 20/37 AT13 190U1 2013-08-15 10. burner replacement module (27) according to claim 9, characterized in that the positioning element (84) is provided with guide grooves (88) for aligning the pipe bend (28) in different positions. 11. burner replacement module (27) according to any one of claims 8 to 10, characterized in that in the periphery of the receiving module (77) has a groove (58) is arranged in the clamping balls (52) of a retaining ring (75) of the burner exchange module (27). when the pipe bend (28) is connected, engage with the burner replacement module (27). 12. burner replacement module (27) according to claim 11, characterized in that the clamping balls (52) are associated with a cone (54) via a spring element (46) in a rest position the clamping balls (52) through an opening (76) in the retaining ring (75) presses outwards for engagement in the groove (58). 13. burner replacement module (27) according to one of claims 9 to 12, characterized in that for positioning the pipe bend (28) of the pipe bend (28) with the holding element (83) relative to the positioning element (84) is rotatable. 14. burner replacement module (27) according to any one of claims 9 to 13, characterized in that on the positioning element (84) a coding system (89) is arranged. 15. burner replacement module (27) according to claim 14, characterized in that the coding system (89) is formed by bores or recesses and pins. 16, welding torch (10), which is designed in particular for attachment to a welding robot, with at least one pipe bend (28) and connectable to the pipe bend burner holder (29), which via a hose package (23) extending therein lines for supplying the welding torch (10) with energy and protective gas (8) with a welding device (1) is connectable, characterized in that for automatically changing the pipe bend (28) or the burner holder (29) a holding module (31) for fixing the pipe bend (28) or the burner holder (29) is provided, which holding module (31) between a fixing position in which the pipe bend (28) or the burner holder (29) is fixable, and a release position in which the pipe bend (28) or the burner holder (29) is releasable, is displaceable, wherein the displacement of the holding module (31) via a tube in the package (23) extending line is controllable, and the holding module (31) in the Brenn Erhalterung (29) or the hose package (23) is integrated and coupled to a receptacle (33) for releasable connection to the pipe bend (28) or the burner holder (29) with a connection arranged thereon (34 '). 17. welding torch (10) according to claim 16, characterized in that the displacement of the holding module (31) via the line (32) for supplying the welding torch (10) with inert gas (8) is controllable. 18. Welding torch (10) according to claim 16 or 17, characterized in that the holding module (31) and corresponding corresponding elements according to claims 2 to 7 are constructed and for use in the welding torch (10), in particular the hose package (23) or Burner holder (29) or the pipe bend (28) are formed. 19. Pipe bend (28) for a welding torch (10), with a connection (34 '), characterized in that for automatically changing the pipe bend (28) of the connection (34') for connection to a receptacle (33) of a holding module ( 31) is formed, wherein the connection (34 ') substantially by a cylinder with a circumferentially extending groove (58') for receiving at least one clamping ball (52) of the holding module (31) is formed. 20. Pipe bend (28) according to claim 19, characterized in that for preventing rotation on the connection (34 ') has a bore for receiving a pin, in particular a gas connection pin (55) is arranged. 21/37 SösriseidfcciKS AT13 190U1 2013-08-15 A burner holder (29) for a welding torch (10), comprising a connection (34 ') for connection to a hose package (23) via which the welding torch (10) has power lines therein to supply the welding torch (10) Protective gas (8) with a welding device (1) is connectable, characterized in that for automatically changing the burner holder (29) of the terminal (34 ') for connection to a receptacle (33) of a holding module (31) is formed, wherein the connection (34 ') has a circumferentially extending groove (58') for receiving at least one clamping ball (52) of the holding module (31) or for automatically changing the burner holder (29) has a receptacle (33) with a holding module (31) is arranged in which the holding module (31) is displaceable between a fixing position in which a pipe bend (28) can be fixed, and a release position in which the pipe bend (28) can be released, wherein the displacement of the holding module (31) is controllable via a package in the tube (23) extending line. 22. burner holder (29) according to claim 21, characterized in that the holding module (31) and corresponding corresponding elements according to the claims 2 to 7 are constructed. 23 hose package (23) for a welding torch (10), with a connection (34) for connection to a burner holder (29) or a pipe bend (28), characterized in that for automatically changing the burner holder (29) or the pipe bend ( 28) a holding module (31) for connection to the burner holder (29) or the pipe bend (28) is provided, which holding module (31) between a fixing position in which the burner holder (29) or the pipe bend (28) is fixable, and a release position in which the burner holder (29) or the pipe bend (28) is releasable, is displaceable, wherein the displacement of the holding module (31) via a tube in the package (23) extending line is controllable. 24 hose package (23) according to claim 23, characterized in that the holding module (31) and corresponding corresponding elements according to the claims 2 to 7 are constructed and for use in the welding torch (10), in particular the hose assembly (23) or the burner holder ( 29) or the pipe bend (28) are formed. 25. A method for automatically changing a pipe bend (28) or a burner holder (29) of a welding torch (10), preferably attached to a welding robot, wherein the welding torch (10) via a hose package (23) with therein lines for supplying the welding torch (10 ) is connected to a welder (1) with energy and protective gas (8), wherein for changing the pipe bend (28) or the burner holder (29) of the welding torch (10) is brought into a change position and a change of the pipe bend (28) or the burner holder (29) is carried out, characterized in that the pipe bend (28) with the burner holder (29) or the burner holder (29) with the hose package (23) via a burner exchange module (27) is connected, and that in the Brennerwechselmodul ( 27) holding module (31) via a tube in the package (23) extending line from a fixing position in which the pipe bend (28) or the burner holder (29) f ixiert, in a release position, in which the pipe bend (28) or the burner holder (29) is released, is moved and after the change of the pipe bend (28) or the burner holder (29), the holding module (31) back into the fixing position, in which the pipe bend (28) or the burner holder (29) is fixed, is moved. 26. The method according to claim 25, characterized in that the holding module (31) is pneumatically displaced by appropriate pressurization of a line (32) for supplying the welding torch (10) with inert gas (8) between the fixing position and the release position. 22/37 ρ®ίκηΕδίϊϊί AT13 190U1 2013-08-15 27. A method for automatically changing a pipe bend (28) or a burner holder (29) of a welding torch (10) preferably attached to a welding robot, wherein the welding torch (10) via a hose package (23) with therein lines for supplying the welding torch (10 ) is connected to a welder (1) with energy and protective gas (8), wherein for changing the pipe bend (28) or the burner holder (29) of the welding torch (10) is brought into a change position and a change of the pipe bend (28) or the burner holder (29) is performed, characterized in that in the burner holder (29) or in the hose package (23) a receptacle (33) with a holding module (31) is arranged, and the holding module (31) via a in the hose package (23 ) extending line from a fixing position in which the pipe bend (28) or the burner holder (29) is fixed, in a release position in which the pipe bend (28) or the burner holder (29) is released, is moved, and after the change of the pipe bend (28) or the burner holder (29), the holding module (31) back into the fixing position in which the pipe bend (28) or the burner holder (29) is fixed , is postponed. 28. The method according to claim 26 and 27, characterized in that the protective gas (8) for displacement of the holding module (31) is used. 29. The method according to claim 26 and 27, characterized in that compressed air which is introduced via a distributor (61) in the conduit (32) for supplying the welding torch (10) with protective gas (8), for displacement of the holding module (31) is used. 14 sheets of drawings 23/37