DE102022112795A1 - Band flash butt welding machine and attachment group for a band flash butt welding machine - Google Patents

Abstract

The invention relates to a band flash butt welding machine (1), with which end faces of band ends (3, 11) of at least one band, in particular a saw band, can be welded. The band flash butt welding machine (1) has tensioning elements (5, 12) for clamping the band ends (3, 11). Furthermore, the strip flash butt welding machine (1) has alignment elements (4, 10) for aligning the strip ends (3, 11). The second clamping elements (12) can be moved in the direction of a longitudinal axis (9) relative to the first clamping elements (5) via a drive. According to the invention, the two alignment elements (4, 10) are connected via a coupling device (54), in particular a bridge part (22). , firmly connected to each other. The coupling device (54) specifies the relative orientation of the alignment elements (4, 10). The second clamping element (12) can be moved relative to the two alignment elements (4, 10). This configuration is advantageous for converting the strip flash butt welding machine (1) for strip ends (3, 11) with a changed geometry. An attachment group (23) is preferably used, with which a conventional strip flash butt welding machine (1) can be adapted according to the invention.

Description

TECHNICAL FIELD OF THE INVENTION

• - von zwei Bändern, die koaxial und flächenbündig zueinander angeordnet sind, zu einem Bandstrang erfolgen, dessen Länge der Länge der beiden Bänder entspricht, oder
• - eines einzigen Bandes, welches zu einem im Bereich der Stirnflächen geschlitzten Bandring gebogen ist, erfolgen, das bzw. der nach dem Verschweißen einen „endlosen“ Bandstrang bildet.

The invention relates to a strip flash butt welding machine. With such a band flash butt welding machine, any band ends (in particular of metallic bands with a constant cross section in the direction of the longitudinal axis) can be welded flush with one another in the area of the end faces. This can in particular involve welding the end faces of band ends

• - from two bands that are arranged coaxially and flush with one another to form a band strand whose length corresponds to the length of the two bands, or
• - a single band, which is bent into a band ring with slots in the area of the end faces, which forms an “endless” band strand after welding.

• - die benötigte Schweißwärme erzeugt wird, indem mittels einer elektrischen Beaufschlagung von Elektroden, die an den zu verschweißenden Komponenten (hier: die Bandenden) anliegen, ein Lichtbogen zwischen den zu verschweißenden Komponenten (hier: die Stirnflächen der Bandenden) erzeugt wird, und
• - die so erwärmten Komponenten (hier die Bandenden mit ihren Stirnflächen) mit einer Anpresskraft aneinander gepresst werden, womit eine Verschweißung der Komponenten über eine Schweißnaht miteinander erfolgt.

The flash butt welding process is a pressure welding process in which:

• - the required welding heat is generated by generating an arc between the components to be welded (here: the end faces of the band ends) by electrically applying electrodes that rest on the components to be welded (here: the band ends), and
• - the components heated in this way (here the band ends with their end faces) are pressed together with a contact pressure, which means that the components are welded together via a weld seam.

In the following, partial reference is made to the design of the band as a saw band, in which case the end faces of the saw band ends of a ring-shaped curved saw band can then be welded in order to produce an “endless” saw band strand. These statements then apply accordingly to at least one band that is not designed as a saw band.

A manufacturing process carried out with a cutting tool is referred to as “chipping” according to DIN 8589-0. According to this standard, a distinction is made when machining between cutting with geometrically determined cutting edges and cutting with geometrically undetermined cutting edges. Cutting with geometrically determined cutting edges also includes sawing DIN 8589-6 . According to this standard, sawing does not include cutting with geometrically indeterminate cutting edges. In practice, cutting belts coated with cutting particles are still referred to as saw belts. When the present patent application/patent refers to a band saw blade, this includes both a band saw band with teeth with geometrically determined cutting edges and a saw band with geometrically undetermined cutting edges.

The invention also relates to an attachment group for a strip flash butt welding machine.

STATE OF THE ART

The website
www.youtube.com/watch?v=_BqfobJ-tY0
(Date of accessing the website: January 14, 2022)
shows the welding of strip ends to form a closed strip strand using a strip flash butt welding machine “IDEAL BAS 340” from the company IDEAL-Werk C. + E. Jungeblodt GmbH + Co. KG, Lippstadt. To insert the band into the band flash butt welding machine, it is bent into a ring that is closed except for a gap between the end faces of the band ends. The band ends facing each other are then inserted into the band flash butt welding machine from both sides and optionally placed with their end faces against an insertion stop. The strip flash butt welding machine has an alignment and clamping unit on both sides of the insertion stop. An alignment and clamping unit is firmly connected to the foundation (in particular a substructure or a support structure) of the strip flash butt welding machine. The other alignment and clamping unit is guided in a translational manner in the direction of the longitudinal axis of the band relative to the foundation in the manner of a slide and can be moved by means of a drive. Each alignment and clamping unit has a stop rail with a vertical stop surface. A band back of the assigned band end is placed on the stop rail. The stop rails carry horizontally oriented support bolts onto which the belt ends can be placed. Once the operator has brought the band ends into the predetermined positions and orientations, which are specified by the stop surface, the support bolts and the insertion stop of the alignment and tensioning units, the band ends are each adjusted by means of tensioning elements of the assigned alignment and tensioning unit, which are actuated by actuators. tensioned and fixed. If an insertion stop was used, the insertion stop is then moved out of the space between the end faces of the belt ends. The width of the gap between the end faces of the strip ends is automatically adjusted to that required for the arc during the burn-off The gap size required for the welding process is reduced. For this purpose, the movable alignment and clamping unit is moved by means of the drive along the translational degree of freedom relative to the foundation and relative to the fixed alignment and clamping unit until the end faces of the band ends have the distance required for the arc. The clamping elements form electrodes. As a result of the contact of the clamping elements with the band ends, an electrical action on the electrodes leads to the formation of the arc between the end faces of the band ends. Already during the generation of the arc, the band ends are moved towards one another by a relative movement of the alignment and tensioning units, with the time course of the relative movement being predetermined by a cam disc set in rotation. At the end of the cam, the arc is switched off in a time-controlled manner. The band ends are then compressed until the joint cools down by a compressing pressure cylinder applying a compressing force to the movable alignment and tensioning unit. The weld seam and the adjacent material areas of the strip ends are then annealed and the weld seam is deburred. During the machining processes, the relative degree of freedom between the two alignment and clamping units can also be used to change the locations at which the band strand is tensioned by the tensioning elements and/or to bring about a displacement of the band strand in the direction of its longitudinal axis and/or a To cause compressive or tensile stress in the band strand. For example, if a tool for deburring the weld seam is arranged at an offset from the weld seam produced, the clamping elements of the fixed alignment and clamping unit can be released and the movable alignment and clamping unit is moved by the offset along the degree of freedom by means of the drive. If the clamping elements of the movable alignment and clamping unit are closed during this movement, the band ends and the weld seam are also moved by the offset from the work area in which the weld seam was created into the work area of the tool for deburring. With this movement, the distance between the clamping elements of the fixed alignment and clamping unit and the weld seam increases. The clamping elements of the fixed alignment and clamping unit are then closed again. Now the clamping elements of the movable alignment and clamping unit are opened and the drive moves these clamping elements until the clamping elements are at the same distance from the weld seam as the clamping elements of the fixed alignment and clamping unit. Then the clamping elements of the movable alignment and clamping unit are closed again. The weld seam can then be deburred. The distances created between the pairs of clamping elements from the weld seam and thus from each other can be dimensioned such that the deburring tool (here a planer) can be moved between the clamping elements along the weld seam. On the other hand, a change in the distance between the tensioning elements on both sides of the weld seam can also be brought about in a corresponding manner in order to enable the band ends to be tensioned at different distances from the end faces for the individual processing steps. A smaller distance may be required for flash butt welding than is the case for deburring and/or annealing. It is also possible for the band ends with the weld seam to be compressed by the drive using the relative degree of freedom between the two alignment and clamping units during processing, in that the drive force-controlled the movable alignment and clamping unit in the direction of the clamping elements in the closed state fixed alignment and clamping unit.

A corresponding strip flash butt welding machine is also in EP 2 540 431 B1 described.

Other strip flash butt welding machines are offered by the company TEMELSAN MAKINA (see www.youtube.com/watch?v=vTq9BCQz1 Mc; www.temelsan.de).

OBJECT OF THE INVENTION

• - der Gewährleistung der erforderlichen Ausrichtung der Bandenden in der Band-Abbrennstumpfschweißmaschine und
• - unter Berücksichtigung des Aufwands für ein Umrüsten der Band-Abbrennstumpfschweißmaschine für den Wechsel von dem Einsatz derselben von dem Einsatz für einen ersten Typ eines Bandes zu einem zweiten Typ eines Bandes mit einer veränderten Geometrie

verbessert ist.The invention is based on the object of proposing a strip flash butt welding machine which, in particular with regard to

• - ensuring the required alignment of the strip ends in the strip flash butt welding machine and
• - taking into account the effort for converting the band flash butt welding machine to change its use from the use for a first type of band to a second type of band with a changed geometry

is improved.

Furthermore, the invention is based on the object of proposing an attachment group which can be attached to a conventional strip flash butt welding machine in order to ensure the aforementioned advantageous properties of the strip flash butt welding machine then formed.

SOLUTION

The object of the invention is achieved according to the invention with the features of the independent patent claims. Further preferred embodiments according to the invention can be found in the dependent patent claims.

DESCRIPTION OF THE INVENTION

The invention is based in particular on the knowledge that, according to the prior art mentioned at the beginning according to www.youtube.com/watch?v=_BqfobJ-tY0, the quality of the weld seam and the band strand produced depends crucially on the exact positioning and orientation of the band ends during the Processing and therefore depends on the position and/or orientation (position and/or orientation hereinafter referred to as “alignment”) of the stop rails of the alignment and clamping units. If at least one band of a second type with different dimensions, in particular a different cross-sectional geometry, is to be welded with the band flash butt welding machine after welding at least one band of a first type, the two stop rails must be adjusted in the horizontal plane transversely to the longitudinal axis of the band strand required (hereinafter also “conversion”). Such a conversion is necessary, for example, to change the strip height of the strips to be welded. Such a conversion may also be necessary, for example, if the height of the saw band does not change when welding saw bands, but a tooth height of the teeth of the saw band changes. The reason for this is that the weld seam is preferably created in the area of the tooth base of the teeth, which means that a changed tooth height can make it necessary to convert the stop rails despite the same band height of the saw band.

When manually adjusting the stop rails is required, the operator must ensure both the correct alignment of the two stop rails to one another and the correct alignment of the stop rails relative to the clamping elements, electrodes and processing tools of the strip flash butt welding machine. This is time-consuming and requires careful and experienced workmanship. What can make matters worse is that tightening the fastening screws of the stop rails to fix them after the desired alignment has been achieved can lead to undesirable changes in the alignment of the stop rails. Therefore, in an iterative process, the stop rails must be repeatedly adjusted and screwed tight with repeated checking and, if necessary, fine adjustment of the alignments in the meantime.

1. a) Sind die Bandrücken der beiden Sägebandenden mit einem Versatz in der Haupterstreckungsebene quer zur Bandlaufrichtung miteinander verschweißt, führt dies im Betrieb des Sägebandstranges zu unerwünschten Kraft- und Wegsprüngen für den Vorschub des Sägebandes in Richtung des Sägekanals des bearbeiteten Werkstücks.

In practice, for the reasons mentioned, the alignment process of the stop rails for changeover for the strip flash butt welding machines according to the prior art leads to increased changeover times. If the alignment is not changed with the required precision, there is a risk that the weld created afterwards will not meet the requirements. Below are just a few exemplary consequences of an inexact adjustment of the alignment of the stop rails according to the prior art when the band to be welded is designed as a saw band:

1. a) If the band backs of the two saw band ends are welded together with an offset in the main extension plane transverse to the band running direction, this leads to undesirable force and displacement jumps during operation of the saw band strand for the feed of the saw band in the direction of the saw channel of the machined workpiece.

• b) Sind die Zahngründe der beiden Enden des Sägebandes nicht bündig zueinander angeordnet, können/kann sich ein verschlechtertes Sägeverhalten, ein verschlechterter Spantransport während des Sägens und/oder eine verringerte Haltbarkeit des Sägebandstranges ergeben.
• c) Auch möglich ist, dass sich bei nicht bündiger Anordnung der Zahngründe während des Schweißverfahrens ein Zahn des Sägebandes im Umgebungsbereich der Schweißnaht aufstellt. In diesem Fall wird bei dem anschließenden Entgraten nicht nur überschüssiges Schweißmaterial, sondern auch Material des Zahns entfernt. Die verringerte Dicke des Zahns kann dann beispielsweise später bei der Nutzung des Sägebandes zu einer unerwünschten Riefenbildung in der gesägten Oberfläche führen. Andererseits kann es auf diese Weise zu einer Verringerung der Dicke der miteinander verschweißten Stirnflächen kommen. Dies führt zu einer dünneren Schweißnaht, was zu einem vorzeitigen Versagen der Schweißnaht im Betrieb führen kann.
• d) Beeinträchtigungen der Festigkeit und des Sägebilds können sich auch ergeben, wenn infolge eines Fehlers beim Ausrichten der Sägebandenden der Querschnitt der Schweißnaht (bei Schnittführung in Bandlaufrichtung und in einer Vertikalebene) nicht rechteckig, sondern trapezförmig ist.

In addition, in this case the weld seam does not extend over the entire end faces of the saw band ends, which leads to reduced strength of the saw band strand.

• b) If the tooth bases of the two ends of the saw band are not arranged flush with one another, this can result in poorer sawing behavior, poorer chip transport during sawing and/or reduced durability of the saw band strand.
• c) It is also possible that if the tooth bases are not arranged flush during the welding process, a tooth of the saw blade will stand up in the area surrounding the weld seam. In this case, the subsequent deburring not only removes excess welding material, but also tooth material. The reduced thickness of the tooth can then, for example, lead to undesirable scoring in the sawn surface later when the saw band is used. On the other hand, this can lead to a reduction in the thickness of the end faces welded together. This results in a thinner weld, which can lead to premature failure of the weld in service.
• d) Impairments to the strength and the saw pattern can also occur if, as a result of an error when aligning the saw band ends, the cross section of the weld seam (when cutting in the direction of the band running and in a vertical plane) is not rectangular but trapezoidal.

Against the background of these disadvantages of known strip flash butt welding machines, the invention proposes a strip flash butt welding machine, for which what has been said for the strip flash butt welding machines according to the prior art basically applies. The band flash butt welding machine according to the invention has first tensioning elements, by means of which a first band end can be tensioned, and second tensioning elements for tensioning a second band end. It is possible that at least one clamping element is designed to be multifunctional as an electrode. Furthermore, the band flash butt welding machine has a first alignment element for aligning the first band end and a second alignment element for aligning the second band end. In the context of the invention, “alignment” includes a specification of an orientation of the band end (in particular in a horizontal plane and/or in a vertical plane) and/or a specification of a position of the band end, in particular in a horizontal plane in a direction transverse to the longitudinal axis of the band and/or in a height direction of the band end. To give just one non-limiting example, the alignment elements can have a horizontal alignment surface on which the respective band end rests, and / or have a vertical alignment surface on which a band back or the teeth of a saw band rest. The alignment elements can also basically be designed as a stop rail, as is the case according to the prior art.

The invention proposes that the second tensioning elements are movable via a drive relative to the first tensioning elements with a movement in the direction of a longitudinal axis of at least one band, which is aligned by means of the alignment elements and is tensioned by the tensioning elements. This movement can be force-controlled or path-controlled for the purposes that have been exemplified for the corresponding movement in the prior art mentioned at the beginning.

According to the invention, the first alignment element and the second alignment element are coupled to one another via a coupling device. The coupling device specifies a relative alignment of the first and second alignment elements.

While according to the prior art the operator had to adjust the relative alignment of the first and second stop rails to one another to convert the strip flash butt welding machine, according to the invention this is ensured by the coupling device. On the one hand, this saves effort when converting the strip flash butt welding machine. On the other hand, according to the invention, the setting of the desired relative alignment of the alignment elements is no longer dependent on the care of the operator, but rather the coupling device “automatically” ensures that the required relative alignment (within the limits specified by the precision of the coupling device) is guaranteed in every case.

• - die Bandenden und ggf. eine bereits zwischen diesen erzeugte Schweißnaht von einem Arbeitsbereich in einen anderen Arbeitsbereich zu bewegen und/oder
• - die erforderliche Breite des Spaltes zwischen den Stirnflächen zur Erzeugung des Lichtbogens herbeizuführen und/oder
• - ein Stauchen des Bandstranges vorzunehmen und/oder
• - den Einspannabstand des Bandstranges durch die Spannelemente zu verändern und/oder
• - nach der Erzeugung der Schweißwärme mit dem Lichtbogen die Stirnflächen der Bandenden aneinanderzupressen,

wobei der Antrieb die Bewegung kraftgesteuert oder weggesteuert oder -geregelt erzeugen kann.In the band flash butt welding machine according to the invention, the second clamping elements can be moved in a translational manner in the direction of the longitudinal axis of the at least one band relative to the two alignment elements by means of the drive. During this movement, a relative sliding movement occurs at least of the band end, which is tensioned by the second tensioning elements, relative to the second sliding element. Such a movement of the second clamping elements can take place, for example

• - to move the band ends and, if necessary, a weld seam already created between them from one work area to another work area and/or
• - to achieve the required width of the gap between the end faces to generate the arc and/or
• - Compress the band strand and/or
• - to change the clamping distance of the band strand by the tensioning elements and/or
• - after generating the welding heat with the arc, press the end faces of the band ends together,

whereby the drive can generate the movement in a force-controlled or path-controlled or regulated manner.

However, while for the embodiment according to the prior art the drive moved a carriage which moved both the second clamping elements and the second stop rail, the embodiment according to the invention releases the coupling of the second clamping elements with the second alignment element and enables a relative movement between them for the first time . This makes it possible to use the coupling device between the first alignment element and the second alignment element.

Within the scope of the invention there is the type of design of the coupling device that Relative alignment of the first and second alignment elements specifies different options.

For a first variant, the coupling device is an electronic coupling device. It is possible, for example, that for the conversion the first alignment element and the second alignment element are each moved via an electronically controlled or regulated drive in a direction transverse to the longitudinal axis of the belt. In this case, the alignment elements can each be guided relative to one another via a transverse guide device in such a way that alignment surfaces of the alignment elements are oriented parallel to one another regardless of the position of the alignment elements along the transverse guide devices. The two drives then only ensure that the two alignment, stop or vertical surfaces of the alignment elements are not offset from one another in the transverse direction, but are arranged in one plane. It is possible that the electronic coupling device is a pure control that controls the same displacements of the two alignment elements in the transverse direction. However, it is also entirely possible for the electronic coupling device to have a control system in which the positions of the alignment elements in the transverse direction are measured using a sensor. The drives are then regulated based on the signals from the sensors so that the desired position is approached in the transverse direction and both alignment elements are moved the same distance in the transverse direction, so that the alignment, stop or vertical surfaces are arranged in one plane. The use of an electronic coupling device is particularly advantageous in the context of automation of the processing of the at least one strip using the strip flash-butt welding machine and in the context of partial or full automation of the conversion of the strip flash-butt welding machine.

For a second variant of the invention, the coupling device is a mechanical coupling device. The mechanical coupling device firmly connects the first alignment element and the second alignment element to one another during the conversion. The mechanical coupling device thus ensures during the conversion that the two alignment elements have the correct relative position to one another and the aligned alignment. In other words, the alignment elements and the mechanical coupling device in the strip flash butt welding machine according to the invention form a unit in which the alignment elements and the mechanical coupling device are moved together. In this case, care must only be taken to ensure that this unit moves in a direction transverse to the longitudinal axis of the belt by the amount required for the changed type of belt (although this must also be ensured without a transverse guide device for the unit). must be carried so that the unit has the correct orientation parallel to the longitudinal axis of the band).

There are a variety of options for designing the mechanical coupling device used within the scope of the invention. For one proposal of the invention, the coupling device has a bridge part, which in the simplest case can be a bridge plate. The bridge part has different sections, namely a first bridge section and a second bridge section. The associated alignment element can be attached, in particular screwed, to the respective bridge section. Here, for example, during initial assembly or on a regular basis or for readjustment, the alignment elements can be screwed to the assigned bridge section in the correct alignment with the unit mentioned. This screw connection and alignment no longer needs to be changed during the conversion. However, it is also possible for the bridge section to directly form the first alignment element. The bridge part also has a recess which is arranged between the first bridge section and the second bridge section. In the area of the recess (when projected into a common horizontal plane) the weld seam can then be produced, a tool of the strip flash butt welding machine can be arranged or moved and/or the first clamping elements and the second clamping elements and/or the electrodes are arranged here. The recess has sufficient dimensions in the horizontal plane to enable a relative movement between the bridge part and the clamping elements and electrodes during conversion.

For a proposal of the invention, the bridge part is roughly U-shaped. In this case, an alignment element is arranged in the area of a vertical leg of the U (preferably with the vertical alignment surface aligned parallel to the base leg of the U) and the recess is delimited by the horizontal leg and the vertical legs of the U, with the recess extending away from the horizontal leg oriented direction is open. In this case, the horizontal leg of the U of the bridge part ensures the connection of the two alignment elements and the associated bridge sections.

In principle, it is possible within the scope of the invention for the mechanical coupling device to exclusively ensure the relative position of the two alignment elements to one another, while then the position of the coupling device with the alignment elements in the transverse direction and/or the correct orientation of the same relative to the strip flash butt welding machine in the horizontal plane must be specified by the operator during the conversion, for example by screwing the coupling device to the foundation of the strip flash butt welding machine the correct position and/or orientation. A further increase in precision and/or reduction in effort during conversion can be achieved with a proposal of the invention, according to which the strip flash butt welding machine has a transverse guide device. The transverse guide device guides the mechanical coupling device with the alignment elements held thereon in such a way that the coupling device with the alignment elements held thereon only has a single degree of freedom in the transverse direction (except for any small remaining tolerances of the transverse guide device). This degree of freedom can then be used for the required adjustment during conversion, while the transverse guide device ensures that the alignment elements have the desired orientation relative to the strip flash butt welding machine. For this proposal, converting the strip flash butt welding machine only requires an adjustment in the transverse direction.

All transverse guide devices known from the prior art can be used for the transverse guide devices that can be used within the scope of the invention. It is possible for two spaced-apart transverse guide devices with parallel transverse guide axes to be used. Preferably, only a single transverse guide device is used, which can be arranged, for example, in a side area of the strip flash butt welding machine. The transverse guide device is designed as a linear guide of one of the known embodiments. The linear guide can be based on a plain bearing or a rolling bearing. To give just one example that does not limit the invention, the transverse guide device can be a linear guide in the form of a prismatic or trapezoidal guide, in which the cross sections of the parts that move relative to one another form a positive connection, whereby these linear guides only have a remaining degree of freedom in the transverse direction. It is also possible for the transverse guide device to be designed as a ball rail guide, see for example the above
www.boschrexroth.com/ics/cat/?cat=Linear-Motion-Technology-Catalog&m=DE&u=si&o=FilterDesktop&p=g254980&pi=4E760D7D-F909-075C-022C11D6E9CE5A7B_ICS_82
(Date of accessing the website: January 18, 2022)
products offered.

The requirements for the precision of the transverse guide device specify a remaining angular error of the coupling device with the alignment elements held thereon. For one proposal of the invention, the angular error can be reduced by tensioning the linear guide used for the transverse guide device, whereby play and/or angular errors in the linear guide can be reduced or eliminated.

Alternatively or cumulatively, it is possible that after the adjustment for the conversion, a locking device is used, via which the degree of freedom of the transverse guide device can be set in the transverse direction. Under certain circumstances, actuation of the locking device also reduces or eliminates play in the transverse guide device, which leads to an angular error. It is possible, for example, that a manual locking device is used, cf. in particular
www.boschrexroth.com/de/de/products/product-groups/linear-technology/accessories-and-spare-parts/clamping-and-braking-elements/hand-clamping-elements-hk-for-ball-rail-guides?p=p668420&cat=Linear-Motion-Technology-Catalog&pi=759F85B1-EEB0- 8791-71DFBB05292B14F3_ICS_97&sapCat=LT&o=portal (date the website was accessed: January 18, 2022),
or a pneumatic locking device controlled manually or electronically via a valve is used, cf. in particular
https://www.boschrexroth.com/de/de/produkte/produktgruppen/lineartechnik/accessories-and-spare-parts/clamp-and-brake-elements/pneumatic-clamp-elements-Icps-for-ball-rail-guides
(Date of accessing the website: January 18, 2022).

The transverse guide device mentioned can serve alone or together with other supports or guide devices for supporting and guiding the unit formed with the mechanical coupling device and the alignment elements. For an embodiment of the band flash butt welding machine according to the invention, the mechanical coupling device with the alignment elements held thereon is additionally guided via a guide device relative to a carriage which guides the second tensioning element for movement in the direction of the longitudinal axis of the band end. For example, this guide device can be a sliding guide that guides the mechanical coupling device or the bridge part relative to the carriage. It is possible, for example, for the bridge part to rest on the carriage at a distance from the transverse guide device with a sliding contact in the vertical direction and to be additionally supported in this way.

A further aspect of the invention is dedicated to generating the movement of the mechanical coupling device with the alignment elements held thereon in the transverse direction. For a first suggestion, the mechanical coupling device with the alignment elements held thereon can be moved in the transverse direction via a drive driven by an external force. This drive is, for example, a controlled or regulated electric drive (in particular a stepper motor, the step size and/or any translation of which can be selected according to the desired precision for the movement in the transverse direction). It is also possible, for example, for an electronically controlled pneumatic or hydraulic drive to be used as the drive.

For another proposal, the mechanical coupling device with the alignment elements held thereon can be moved manually in the transverse direction. For this purpose, a manual actuation element such as a handwheel, an actuation slide, etc. can be provided, via which the operator can apply the actuation forces to move the coupling device in the transverse direction.

It is possible that the drive driven by external power or the actuator for manual actuation act directly on the mechanical coupling device. For a preferred embodiment of the band flash butt welding machine, a gear is arranged in the power flow between the mechanical coupling device with the alignment elements held thereon on the one hand and the drive or the manual actuator on the other hand. On the one hand, the transmission can be used to translate the forces required for the movement into the forces generated by the drive or manually. On the other hand, by means of a suitable step-up or step-down, the actuation kinematics can be influenced in such a way that the precision desired for the conversion is achieved when the coupling device moves in the transverse direction.

All gearboxes known from the prior art can be used for the gearbox that can be used within the scope of the invention. For one proposal of the invention, the gear is a spindle drive. Such a spindle drive can (depending on the selected pitch of the thread and the resulting gear ratio) enable a very sensitive adjustment of the movement of the coupling device in the transverse direction. On the other hand, the spindle drive can also be used to provide rigid support for the mechanical coupling device. One of the known thread geometries of the spindle drive can be used to dimension the play of the gear and the rigidity of the drive connection. To give just one example that does not limit the invention, the spindle drive can have a trapezoidal thread.

It is possible within the scope of the invention for the clamping elements to be designed separately from the electrodes for carrying out the welding process. However, in a preferred embodiment, the invention proposes that a first clamping element and/or a second clamping element (preferably the lower clamping elements) directly form an electrode for the welding process.

In principle, the clamping elements forming the electrode can be designed in one piece, as is the case in the embodiments known from the prior art. However, two-part electrodes can also be used in a strip flash butt welding machine according to the invention. In this case, the electrodes have a base body and a contact body. The base body is used to fasten the electrode to a foundation or support body or carriage of the strip flash butt welding machine and has the necessary fastening devices for this purpose, for example holes for the passage of fastening screws. On the other hand, the contact body serves to contact the associated band end through a contact surface of the contact body. In order to ensure large-area contact between the contact surface of the contact body and the associated band end for the electrical connection of the electrode to the band end, the contact surface must be ground with high precision. Since the contact surface wears away during operation of the strip flash butt welding machine and the mechanical and electrical contact conditions in the area of the contact surface, regular regrinding of the contact surface is necessary, which gradually changes the height of the electrode. If a predetermined amount of height has been removed, the clamping element forming the electrode must be completely replaced according to the prior art. On the other hand, for the two-part design of the electrode, after the separately formed contact body has been processed to a minimum, only the contact body can be replaced, while the same base body to which the processed contact body was attached can then also be used for a new contact body. This leads to significant cost savings.

• - kann ein Isolationselement zwischen den Anschlagelementen und dem Brückenteil angeordnet sein und/oder
• - können Schraubenisolatoren im Bereich der Schrauben vorgesehen sein, mittels welchen die Ausrichtelemente an dem Brückenteil befestigt sind, und/oder
• - können Isolationselemente zwischen einer Anbaugruppe, die das Brückenteil aufweist, und einem Fundament der Band-Abbrennstumpfschweißmaschine angeordnet sein und/oder
• - kann die zuvor genannte Gleitführung ein Isolationselement zur Trennung der mechanischen Kopplungseinrichtung von dem Schlitten aufweisen.

In order to bring about the heating required for welding the strip ends, as high a proportion as possible of the electrical energy must be used. with which the electrodes are applied, are transmitted from the electrodes via the end faces of the band ends. If the bridge part creates an electrical connection between the alignment elements (directly or indirectly via other components of the band flash butt welding machine), this electrical connection would form an undesirable bypass for the electrical input. As a result of the bypass, the electrical energy with which the electrodes are applied would not be completely or largely transmitted via the end faces of the band ends. As a suggestion, the invention suggests that the band flash butt welding machine has at least one insulation element which separates an electrical connection of the alignment elements via the bridge part. To give just a few examples that do not limit the invention,

• - an insulation element can be arranged between the stop elements and the bridge part and/or
• - Screw insulators can be provided in the area of the screws by means of which the alignment elements are attached to the bridge part, and/or
• - Insulation elements can be arranged between an attachment group that has the bridge part and a foundation of the strip flash butt welding machine and / or
• - The aforementioned sliding guide can have an insulating element for separating the mechanical coupling device from the carriage.

Another solution to the problem on which the invention is based is an attachment group for a band flash-butt welding machine. This attachment group can be used, for example, to convert a conventional band flash-butt welding machine (and thus also, for example, a band flash-butt welding machine, as described at the beginning). in a new strip flash butt welding machine with the properties according to the invention explained above. The attachment group has a bridge part with a first alignment element for a first band end and a second alignment element for a second band end. Furthermore, the attachment group has a fastening area via which the attachment group can be attached to a foundation of the (possibly conventional) strip flash butt welding machine. To give just one example that does not limit the invention, foundations of known strip flash butt welding machines can anyway have fastening holes that serve to fasten stop elements such as eyebolts. The stop elements can be used to attach a sling of a crane with which the strip flash butt welding machine can be handled during transport, erection or dismantling. It is also possible that the fastening area of the attachment group interacts with holes in the strip flash butt welding machine, which are intended for insulating plates of the conventional strip flash butt welding machine or for fastening stop rails, etc.

Finally, the attachment group according to the invention has a transverse guide device via which the fastening area is coupled to the bridge part. With regard to the design of the transverse guide device, what was said above regarding the transverse guide device of the strip flash butt welding machine according to the invention applies accordingly.

• - eine mechanische Kopplungseinrichtung bilden und/oder
• - erste und zweite Brückenteilabschnitte mit einer dazwischen angeordneten Ausnehmung aufweisen und/oder
• - eine Arretiereinrichtung aufweisen, über die der Freiheitsgrad der Querführungseinrichtung in Querrichtung festsetzbar ist und/oder
• - eine Führungseinrichtung für eine Führung gegenüber einem Schlitten, der das zweite Spannelement für die Bewegung in Richtung der Längsachse des Bandendes führt, aufweisen und/oder
• - einen mittels einer Fremdkraft angetriebenen Antrieb oder ein manuelles Betätigungsorgan für die Bewegung des Betätigungsteils in Querrichtung aufweisen und/oder
• - ein Getriebe oder einen Spindeltrieb aufweisen.

The attachment group according to the invention can also have other previously mentioned devices, components or properties. In particular, the bridge part

• - form a mechanical coupling device and/or
• - have first and second bridge sections with a recess arranged between them and/or
• - Have a locking device via which the degree of freedom of the transverse guide device can be fixed in the transverse direction and / or
• - have a guide device for guidance relative to a carriage which guides the second tensioning element for movement in the direction of the longitudinal axis of the band end and/or
• - have a drive driven by an external force or a manual actuator for moving the actuating part in the transverse direction and/or
• - Have a gear or a spindle drive.

Within the scope of the invention, it is possible for the attachment group to be assembled using the (possibly conventional) strip flash butt welding machine without changing the position of the components of the strip flash butt welding machine. However, for one proposal of the invention, the attachment group has at least one intermediate body. The intermediate body can be between a foundation of the strip flash butt welding machine and a tool of the strip flash butt Welding machine, an actuator for a clamping jaw and / or the bridge part, the alignment element or the clamping elements and / or the electrode can be arranged, with which the working height can be increased compared to the foundation. This increase in the working height makes it possible, for example, for additional installation space to be available for the design of the electrode, so that it can also be designed in two parts with a base body and a contact body, as explained previously.

Advantageous developments of the invention result from the patent claims, the description and the drawings.

The advantages of features and combinations of several features mentioned in the description are merely examples and can have an alternative or cumulative effect without the advantages necessarily having to be achieved by embodiments according to the invention.

With regard to the disclosure content - not the scope of protection - of the original application documents and the patent, the following applies: Further features can be found in the drawings - in particular the geometries shown and the relative dimensions of several components to one another as well as their relative arrangement and operative connection. The combination of features of different embodiments of the invention or of features of different patent claims is also possible, deviating from the selected relationships of the patent claims, and is hereby encouraged. This also applies to features that are shown in separate drawings or are mentioned in their description. These features can also be combined with features of different patent claims. Likewise, features listed in the patent claims may be omitted for further embodiments of the invention, but this does not apply to the independent patent claims of the granted patent.

The features mentioned in the patent claims and the description are to be understood in terms of their number in such a way that exactly this number or a larger number than the number mentioned is present, without the need for an explicit use of the adverb “at least”. For example, when we talk about an element, this should be understood to mean that there is exactly one element, two elements or more elements. The features listed in the patent claims can be supplemented by further features or can be the only features that the subject of the respective patent claim has.

The reference symbols contained in the patent claims do not represent a limitation on the scope of the subject matter protected by the patent claims. They merely serve the purpose of making the patent claims easier to understand.

BRIEF DESCRIPTION OF THE FIGURES

• 1 zeigt stark schematisiert eine Band-Abbrennstumpfschweißmaschine gemäß dem Stand der Technik.
• 2 zeigt stark schematisiert eine Band-Abbrennstumpfschweißmaschine.
• 3 zeigt eine Band-Abbrennstumpfschweißmaschine in einer Vorderansicht.
• 4 zeigt die Band-Abbrennstumpfschweißmaschine gemäß 3 in einem Horizontalschnitt IV-IV für die in 3 gekennzeichnete Schnittführung.
• 5 zeigt eine Anbaugruppe für eine Band-Abbrennstumpfschweißmaschine in einer Draufsicht.
• 6 zeigt die Anbaugruppe gemäß 5 in einer Vorderansicht.
• 7 zeigt die Anbaugruppe gemäß 5 und 6 in einer Ansicht von links.
• 8 zeigt eine Anbaugruppe mit darauf angeordneten Bandenden und Zwischenkörpern bei einer demontierten Lagerplatte in einer räumlichen Darstellung.
• 9 zeigt die Anbaugruppe mit Bandenden und Zwischenkörpern gemäß 8 in einer Vorderansicht.
• 10 zeigt einen Schnitt X-X der Anbaugruppe mit Bandenden und Zwischenkörpern bei der in 9 gekennzeichneten Schnittführung.
• 11 zeigt die Anbaugruppe mit Bandenden und Zwischenkörpern gemäß 8 bis 10 bei demontierter Lagerplatte in einer Ansicht von links.
• 12 zeigt in einer Draufsicht die Anbaugruppe mit Bandenden und Spannelementen, Elektroden und Aktuatoren.

The invention is further explained and described below using preferred exemplary embodiments shown in the figures.

• 1 shows a highly schematized strip flash butt welding machine according to the prior art.
• 2 shows a highly schematized strip flash butt welding machine.
• 3 shows a strip flash butt welding machine in a front view.
• 4 shows the band flash butt welding machine according to 3 in a horizontal section IV-IV for the in 3 marked cutting route.
• 5 shows an attachment group for a strip flash butt welding machine in a top view.
• 6 shows the attachment group according to 5 in a front view.
• 7 shows the attachment group according to 5 and 6 in a view from the left.
• 8th shows an attachment group with belt ends and intermediate bodies arranged on it with a dismantled bearing plate in a spatial representation.
• 9 shows the attachment group with belt ends and intermediate bodies according to 8th in a front view.
• 10 shows a section XX of the attachment group with belt ends and intermediate bodies at the in 9 marked incision.
• 11 shows the attachment group with belt ends and intermediate bodies according to 8th until 10 with the bearing plate dismantled in a view from the left.
• 12 shows a top view of the attachment group with belt ends and clamping elements, electrodes and actuators.

FIGURE DESCRIPTION

In the figures, components that correspond or are similar in terms of their geometries and/or functions are sometimes included provided with the same reference numbers, whereby these can then be distinguished from one another by the additional letters a, b, .... If a reference to such a component is made by using the reference number without the additional letter, this can mean an individual component, any number of these components or all components.

1 shows a strip flash butt welding machine 1 according to the prior art. The strip flash butt welding machine 1 has a foundation 2, which can be solid or designed as a support structure. A first band end 3 is aligned by a first alignment element 4 with an alignment rail and support bolts and tensioned between first clamping elements 5a, 5b, with at least one of the first clamping elements 5 forming a first electrode 6. The first band end 3 has a first end face 7.

By means of a drive, not shown here, a carriage 8 can be moved with a movement 14 in the direction of a longitudinal axis 9, which corresponds to the longitudinal axis 9a of the first belt end 3. A second alignment element 10 is attached to the carriage 8. The second alignment element 10 aligns a second band end 11. The second band end 11 is tensioned between second tensioning elements 12a, 12b, with at least one of the second tensioning elements 12 forming a second electrode 13. With the movement 14 of the carriage 8 along the longitudinal axis 9, a corresponding movement of the second clamping elements 12, the second electrode 13, the second alignment element 10 and the second band end 11 takes place. The second band end 11 has a second end face 15. In the in 2 In the operating position outlined, the end faces 7, 15 lie against one another or are connected to one another via a weld seam 16. The strip flash butt welding machine 1 has at least one electronic control unit 17. On the one hand, the electronic control unit 17 controls the electrical supply to the electrodes 6, 13. On the other hand, the control unit 17 controls the operation of actuators 18a, 18b for actuating the clamping elements 5, 12 and the drive to create the movement 14.

In 1 The longitudinal axis 9 indicates the longitudinal axis of the band ends 3, 11, which corresponds to the band running direction of the saw band when the band is in operation for sawing a workpiece. On the other hand, referred to in 1 a transverse direction 19 a direction transverse to the longitudinal axis 9 in a horizontal plane, the transverse direction 19 corresponding to the direction of extension of the weld seam 16.

To convert the strip flash butt welding machine 1, it is necessary for adjustments 20a, 20b to be made for the alignment of the alignment elements 4, 10. By means of the adjustments 20, it must be ensured in particular that vertical surfaces 21a, 21b of the alignment elements 4, 10 are arranged in one plane and are arranged in a correct position in the transverse direction 19, which are of the type of at least one band which has the band ends 3, 11 forms, depends. Here the adjusted alignment of the alignment elements 4, 10 is fixed by means of screw connections to the foundation 2 or the carriage 8.

2 shows a strip flash butt welding machine 1 according to the invention, for which until further notice the same applies to the known strip flash butt welding machine 1 according to 1 as well as the band flash butt welding machines of the prior art explained at the beginning.

For this embodiment, the two alignment elements 4, 10 are rigidly connected to one another via a bridge part 22, it being possible for the alignment of the alignment elements 4, 10 to one another to be adjustable via an adjusting device or screws, regardless of the conversion, for initial assembly or fine or readjustment is. For a conversion, however, only a single adjustment 20 of the bridge part 22 and with it the alignment elements 4, 10 takes place, the alignment of the alignment elements 4, 10 to one another cannot change during the adjustment 20. In this case, the second alignment element 10 is not held on a carriage 8. Rather, a carriage 8 carries exclusively the second clamping elements 12, the electrode 13 formed separately therefrom or the electrode 13 formed integrally with the second clamping elements 12 and the second actuator 18b. If there is a movement 14 of the carriage 8 with the tensioning elements 12, the electrode 13 and the actuator 18, while the second band end 11 is tensioned by the tensioning elements 12, a sliding relative movement of the second band end 1 occurs relative to the second alignment element 10, especially in the area of the vertical surface 21 b.

In the 3 until 12 A special embodiment of the invention is shown, in which the band flash butt welding machine according to the invention is formed by attaching an attachment group 23 to a conventional band flash butt welding machine.

• - das Brückenteil 22 mit den Ausrichtelementen 4, 10,
• - einen Befestigungsbereich 24 für die Befestigung der Anbaugruppe 23 an dem Fundament 2 der Band-Abbrennstumpfschweißmaschine 1 (hier im Seitenbereich derselben),
• - eine Querführungseinrichtung 25, über die das Brückenteil 22 in die Querrichtung 19 gegenüber dem Befestigungsbereich 24 geführt ist,
• - und ein Handbetätigungsorgan, hier in Form eines Handrades 26, zur Herbeiführung der Relativbewegung des Brückenteils 22 gegenüber dem Befestigungsbereich 24 in die Querrichtung 19

auf (vgl. auch die folgenden Figuren und zugeordnete Beschreibung). 3 shows the band flash butt welding machine 1 with the attachment group 23 in a front view. A foundation 2 can be seen here, against which a carriage 8 can carry out a movement 14. This movement 14 also carry out the tower-like actuators 18b with an upper and lower clamping element 12a, 12b and the second electrode 13 formed thereby. The attachment group 23 points

• - the bridge part 22 with the alignment elements 4, 10,
• - a fastening area 24 for fastening the attachment group 23 to the foundation 2 of the strip flash butt welding machine 1 (here in the side area of the same),
• - a transverse guide device 25, via which the bridge part 22 is guided in the transverse direction 19 relative to the fastening area 24,
• - and a manual actuation element, here in the form of a handwheel 26, for bringing about the relative movement of the bridge part 22 relative to the fastening area 24 in the transverse direction 19

(see also the following figures and associated description).

In the horizontal section IV-IV according to 4 It can be seen that the alignment elements 4, 10 each have a stop body 27a, 27b, which form the vertical surface 21a, 21b for the band backs 28a, 28b of the band ends 3, 11. In addition, the alignment elements 4, 10 have support bodies 29a, 29b, which extend from the stop bodies 27 below the band ends 3, 11 in the transverse direction 19 and on which the band ends 3, 11 rest with their undersides. As in 4 As can be seen, the alignment elements 3, 11 each have a pair of such support bodies 29, which are arranged at a distance from one another in the direction of the longitudinal axis 9.

5 until 7 show different views of the attachment group 23. In the top view according to 5 It can be seen that the bridge part 22 is designed as a bridge plate 30. The bridge part 22 is, to a first approximation, U-shaped with a base leg 31 and two side legs 32, 33. The base leg 31 and the side legs 32, 33 delimit a recess 34 that is open in one direction. In the area of the side legs 32, 33 are each the alignment elements 4, 10 are arranged, the stop bodies 27 and the vertical surfaces 21 formed by them being arranged parallel to the base leg 31, while the support bodies 29 are arranged vertically to the base leg 31.

In 6 It can be seen that the transverse guide device 25 has a guide rail 35 extending in the transverse direction 19, the cross section of which is positively enclosed by two guide bearings 36, the transverse guide device 25 enabling a relative movement of the guide bearings 36 along the guide rail 35 in the transverse direction 19. For the illustrated embodiment, the guide bearings 36 are attached to the fastening area 24, while the guide rail 35 is attached to a vertically oriented bearing plate 37 attached to the bridge part 22. The guide bearings 36 are preferably braced in a manner known per se to reduce play in the transverse guide device 25. The transverse guide device 25 is preferably designed as a ball rail guide. If the attachment group 23 is attached to the foundation 2 via the fastening area 24, the adjustment 20 of the bridge part 22 with the alignment elements 4, 10 can be brought about as a unit by means of the movement in the transverse direction 19 guided by the transverse guide device 25.

Furthermore, the attachment group 23 has a locking device 38, which can be operated manually by the operator via a locking lever 39 for the exemplary embodiment shown. For the illustrated embodiment of the locking device 38, the locking jaws 40a, 40b (cf. 11 ) can be done in such a way that the locking jaws 40 are clamped to the guide rail 35, whereby the degree of freedom of the transverse guide device 25 in the transverse direction 19 is locked. The locking device 38 is released when the conversion is to take place. Once the adjustment 20 has been made to the desired extent, the locking device 38 is locked again.

For the exemplary embodiment shown, the adjustment 20 in the transverse direction 19 is brought about by manually turning the handwheel 26. A gear 41, here a spindle drive 42, is actuated with the handwheel 26. The spindle drive 42 has a spindle 43 which is rotatably connected to the handwheel 26 and is rotatably mounted in bearings, as well as a spindle nut 44 which has only one degree of freedom in the transverse direction 19 due to the transverse guide device 25. For the illustrated embodiment, the bearings are attached to the fastening area 24, while the spindle nut 44 is attached to the bearing plate 37.

The fastening area 24 has a fastening plate 45, which, on the one hand, carries the bearings mentioned for the spindle 43 and the guide bearings 36 and, on the other hand, fastening bolts 46a, 46b, which can be screwed to threaded holes in the foundation 2. These can be threaded holes for lifting eyes, via which the band flash butt welding machine according to the prior art can be articulated on a hook of a crane.

It is possible that the working plane in which the band ends 3, 11 and the contact surfaces with the alignment elements 4, 10 as well as the areas of interaction with the clamping elements 5, 12 and electrodes 6, 13 as well as a tool, for example for Deburring, are arranged, is raised relative to the working plane for the strip flash butt welding machine known from the prior art, which can be reflected in the dimensioning of the bridge part 22 and the alignment elements 4, 10 as well as the lower clamping elements 5, 12 and electrodes 6, 13 in the height direction. If this also requires lifting the upper clamping elements 5, 12 and/or the associated actuators 18a, 18b, additional intermediate bodies 47 can be used in the attachment group 23, on which the actuators 18a, 18b and the associated upper clamping elements 5, 12 are arranged (see. 9 , 10 ). This elevation of the working plane also enables the lower clamping elements 5, 12 and the electrodes 6, 13 formed by them to be designed in two parts with a base body 48 and a contact body 49. The base body 48 and the contact body 49 are used to form a rigid unit with one another screwed. The base body 48 is used for attachment to the foundation 2 or the carriage 8, while the contact body 49 is used to contact the band ends 3, 11 and to transmit the electrical energy of the electrodes 6, 13.

To form the arc between the end faces 7, 15 of the band ends 3, 11, care must be taken to ensure that the electrodes 6, 13 are not short-circuited via the bridge part 22 or the attachment group 23. For this purpose, insulation elements 50 must be provided on the path between the electrodes 6, 13 via the adjacent band ends 3, 11, the alignment elements 4, 10 and the bridge part 22, which interrupt the short circuit.

For the exemplary embodiment shown, insulation elements 50a are designed as plastic plates 51, which are arranged between the alignment elements 4, 10 and the bridge part 22. The screws used to fasten the alignment elements 4, 10 to the bridge part 22 have screw insulators that form insulation elements 50b. Furthermore, the fastening area 24 can be supported on the foundation 2 via plastic plates 51, which form insulation elements 50c. For the exemplary embodiment shown, the attachment group 23 also has a plastic plate 52, which forms a further insulation element 50d. Via the plastic plate 52, the bridge part 22 of the attachment group 23 is additionally supported in the vertical direction in the end region on the side facing away from the transverse guide device 25 and the fastening area 24 to enable movement in the transverse direction 19, thereby forming a further guide device 53 for the attachment group 23 is. Here the guide device 53 is designed as a sliding guide. It is possible that the plastic plate 52 is supported on the top of the carriage 8 of the strip flash butt welding machine 1. In this case, the guide device 53 not only ensures a sliding relative movement in the transverse direction 19 for the adjustment 20, but also a relative movement parallel to the longitudinal axis 9 during the movement of the carriage 8.

According to the invention, the alignment elements 4, 10 are coupled via a mechanical coupling device 54, which is formed with the bridge part 22 for the exemplary embodiment shown.

In the bridge part 22, the two side legs 32, 33 each form bridge sections 55, 56, which are connected to one another via the base leg 31. The alignment elements 4, 10 are attached to the bridge sections 55, 56. The mechanical coupling then takes place via the base leg 31, which forms a type of coupling web.

For the description of the figures, reference has been made to any band ends 3, 11, so that they can, for example, be band ends of any two bands with any longitudinal extent, any cross sections and any materials. The band ends 3, 11 are preferably saw band ends of a saw band that has been bent over and welded into an endless ring.

REFERENCE SYMBOL LIST

1

Band flash butt welding machine

2

foundation

3

first end of tape

4

first alignment element

5

first clamping element

6

first electrode

7

first face

8th

Sleds

9

Longitudinal axis

10

second alignment element

11

second end of tape

12

second clamping element

13

second electrode

14

Movement

15

second face

16

Weld

17

Control unit

18

actuator

19

Transverse direction

20

adjustment

21

vertical surface

22

Bridge part

23

Cultivation group

24

Fastening area

25

Transverse guidance device

26

Handwheel

27

stop body

28

Ribbon back

29

Support body

30

Bridge plate

31

base leg

32

side leg

33

side leg

34

recess

35

Guide rail

36

Leadership camp

37

bearing plate

38

Locking device

39

Locking lever

40

Locking jaws

41

transmission

42

Spindle drive

43

spindle

44

spindle nut

45

mounting plate

46

Fastening bolts

47

Intermediate body

48

basic body

49

contact body

50

Insulation element

51

plastic panels

52

plastic plate

53

Management facility

54

Coupling device

55

Bridge section

56

Bridge section

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed 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.

Cited patent literature

• EP 2540431 B1 [0007]

Non-patent literature cited

• DIN 8589-6 [0004]

Claims (16)

Band flash butt welding machine (1) for welding end faces (7, 15) of band ends (3, 11) of at least one band with a) first tensioning elements (5) for tensioning a first band end (3) and second tensioning elements (12) for a tensioning of a second band end (11), b) a first alignment element (4) for aligning the first band end (3) and a second alignment element (10) for aligning the second band end (11), c) wherein the second tensioning elements ( 12) can be moved via a drive in the direction of a longitudinal axis (9) relative to the first clamping elements (5), characterized in that d) the first alignment element (4) and the second alignment element (10) via a coupling device which ensures a relative alignment of the first and second alignment elements (4, 10), are coupled to one another, and e) the second clamping elements (12) can be moved translationally in the direction of the longitudinal axis (9) relative to the two alignment elements (4, 10) by means of the drive. Band flash butt welding machine (1). Claim 1 , characterized in that the coupling device is an electronic coupling device. Band flash butt welding machine (1). Claim 1 , characterized in that the coupling device is a mechanical coupling device (54) which firmly connects the first alignment element (4) and the second alignment element (10) to one another during a conversion. Band flash butt welding machine (1). Claim 3 , characterized in that the coupling device (54) has a bridge part (22) which has a) a first bridge section (55) with the first alignment element (4) b) a second bridge section (56) with the second alignment element (10) and c ) a recess (34), ca) which is arranged between the first bridge section (55) and the second bridge section (56) and cb) in the area in which - the weld seam (16) is created and / or - a working area of a tool of the band - Flash butt welding machine (1) is arranged and / or - the clamping elements (5, 12) and / or the electrodes (6, 13) are arranged. Band flash butt welding machine (1). Claim 3 or 4 , characterized in that the coupling device (54) with the alignment elements (4, 10) held thereon is guided in a transverse direction (19) via a transverse guide device (25) with one degree of freedom. Band flash butt welding machine (1). Claim 5 , characterized in that a locking device (38) is present, via which the degree of freedom of the transverse guide device (25) in the transverse direction (19) can be fixed. Band flash butt welding machine (1) according to one of the Claims 3 until 6 , characterized in that the coupling device (54) with the alignment elements (4, 10) held thereon is connected via a guide device (53) relative to a carriage (8) which supports the second clamping element (12) for movement in the direction of the longitudinal axis (9). leads, is led. Band flash butt welding machine (1) according to one of the Claims 3 until 7 , characterized in that the coupling device (54) with the alignment elements (4, 10) held thereon can be moved in the transverse direction (19) via a drive driven by an external force. Band flash butt welding machine (1) according to one of the Claims 3 until 8th , characterized in that the coupling device (54) with the alignment elements (4, 10) held thereon can be moved manually in the transverse direction (19). Band flash butt welding machine (1). Claim 8 or 9 , characterized in that a gear (41) is arranged in the power flow between a) the coupling device (54) with the alignment elements (4, 10) held thereon and b) the drive or a manual actuator. Band flash butt welding machine (1). Claim 10 , characterized in that the gear (41) is a spindle drive (42). Band flash butt welding machine (1) according to one of the preceding claims, characterized in that at least a first clamping element (5) and/or at least one second clamping element (12) forms an electrode (6; 13). Band flash butt welding machine (1). Claim 12 , characterized in that the electrode (6; 13) is designed in two parts with a) a base body (48) over which the electrode (6; 13) is attached, and b) a contact body (49), which is pressed against the associated band end (3; 11) for contacting. Band flash butt welding machine (1) according to one of the preceding claims, characterized in that at least one insulation element (50) is present which separates an electrical connection of the alignment elements (4, 10) via the bridge part (22). Add-on group (23) for a strip flash butt welding machine, in particular for forming a strip flash butt welding machine (1) according to one of the preceding claims, with a) a bridge part (22) with a first alignment element (4) for a first band end (3) and a second alignment element (10) for a second band end (11), b) a fastening area (24) via which the attachment group (23) can be fastened to the strip flash butt welding machine (1), and c) a transverse guide device (25), via which the fastening area (24) is coupled to the bridge part (22) with a degree of freedom in a transverse direction (19). Add-on group (23). Claim 15 , characterized in that the attachment group (23) has an intermediate body (47) which is between a foundation (2) and a) a tool of the strip flash butt welding machine (1) and / or b) an actuator (18) for a clamping element ( 5, 12) and/or c) the bridge part (22) and/or an alignment element (4, 10) and/or an electrode (6, 13) and/or a clamping element (15, 12).

Images