DE102018112876A1 - Splash guard and method for welding wires in the manufacture of a spooled component of an electrical machine - Google Patents

Abstract

A splash guard for use in the welding of wires in the manufacture of a coiled component of an electric machine, in particular a stator of an electric motor for motor vehicles, comprising at least two cover elements (10a, 10b) which are shaped so that they together form a closed chamber ( 20) for receiving a weld (5) at which a wire (1a) is welded to another element or wire (1b) so that the space outside the chamber (20) is protected from welding spatter (7). At least one of the cover members (10a, 10b) is movable to open and close the chamber (20). A transport device (30) serves to remove the spatter from the chamber (20). The wires are shaped in particular as hairpins.

Description

The invention relates to a splash guard for use in welding wires in the manufacture of a coil-provided component of an electrical machine. Furthermore, the invention relates to a method for welding wires in the manufacture of a coil-provided component of an electrical machine.

Electrical machines are understood in particular as machines for converting electrical energy into kinetic energy and machines for converting kinetic energy into electrical energy. In particular, these include electric motors and generators.

In the manufacture of machine elements of such electrical machines, such as stators or rotors, it is often necessary to interconnect or otherwise work together ends of electrical conductors formed from wires, e.g. to cut or shape together.

For example, there are electric motors in which coil windings, in particular of the stator, are formed of a plurality of wire pieces whose ends are connected to each other. Such pieces of wire are often referred to as hairpins. The wire from which the hairpins are formed, in particular, may have a rectangular cross-section, be equipped as a flat, square or profile wire, or be present for example as a flat strip steel or the like.

A stator element with a plurality of grooves serves to receive the hairpins.

An example of a known hairpin is in 2a shown in a side view. The hairpin has several angles, resulting in a roof shape, which is also referred to as a house roof shape. In order to assemble a plurality of hairpins as densely packed as possible in the production of stators, the hairpins in their roof area are bent in a direction that is perpendicular to the plane of the hairpin, that is to say perpendicular to the plane of the drawing 2a ,

2 B shows the hairpin in an enlarged view from above on his roof. In this view, the two legs of the hairpin run perpendicular to the plane of the drawing. The bent wire or hairpin has a three-dimensional shape or a 3-D form.

In 3 By way of example, a stator element is shown in a view from above, which has a plurality of grooves for receiving the hairpins.

In order to make a stator using hairpins as electrical conductors, the different hairpins must be connected together at their ends or at the ends of their legs, which is usually done by welding. In addition, to connect the three phases of a stator to a power electronics, an element for the corresponding interconnection with the hairpins must be welded. This element is called a Verschaltelement.

Devices have been proposed for joining wire ends of hairpins for forming stator windings of electrical machines, in which the wire ends are welded together. In this case, devices and methods for positioning and clamping the wire ends are provided prior to welding.

• [1] DE 10 2018 103 926.3 ,
• [2] DE 10 2018 103 929.8 und
• [3] DE 10 2018 103 930.1 ,

auf die für weitere Einzelheiten ausdrücklich verwiesen wird, werden Vorrichtungen und Verfahren zum Umformen von Drahtenden von Hairpins und ein Herstellverfahren für ein Bauteil einer elektrischen Maschine unter Verwendung derselben beschrieben. Die in diesen früheren Patentanmeldungen beschriebenen Vorrichtungen und Verfahren dienen insbesondere zum Umformen der „normalen“ Hairpin-Drahtenden, die miteinander verbunden werden, um so Spulenwicklungen zu bilden. Das Verbinden erfolgt z.B. mittels Schweißen, wozu es vorteilhaft ist, in der deutschen Patentanmeldung

• [4] DE 10 2018 103 100.9 ,

auf die für weitere Einzelheiten ausdrücklich verwiesen wird, beschriebene und gezeigte Vorrichtungen und Verfahren zum Positionieren und Spannen der Hairpin-Drahtenden zu verwenden.In the German patent applications

• [1] DE 10 2018 103 926.3 .
• [2] DE 10 2018 103 929.8 and
• [3] DE 10 2018 103 930.1 .

to which reference is expressly made for details, apparatuses and methods for forming wire ends of hairpins and a method of manufacturing a component of an electric machine using the same will be described. The devices and methods described in these earlier patent applications are particularly useful for reshaping the "normal" hairpin wire ends which are joined together to form coil windings. The bonding is carried out, for example by means of welding, for which it is advantageous in the German patent application

• [4] DE 10 2018 103 100.9 .

to which reference is expressly made for further details, to use and illustrated apparatus and methods for positioning and tensioning the hairpin wire ends.

For example, in this way coil windings of several phases of a component of an electric machine, such as e.g. a stator of an electric motor. To connect the phases, some wire ends can serve as connection conductors. This can e.g. happened over several special pins. For example, For example, some of the hairpins may provide longer wire ends, which then serve as the boarding conductor, which are then to be connected to a boarding element.

In the mutual welding of hairpins or wire ends for the production of Coil windings as well as the welding of the hairpins with Verschaltelementen arise during welding welding spatters, which are very different in size and shape and fly undefined from the weld into the environment. If the spatters get into the stator space or adhere to other hairpins, there is a risk that they will later peel off when operating an electric motor in which the stator is installed. As a result, there may be a short circuit or other impairment of the electric motor.

It is the object of the invention to provide a device with which an impairment of the operation of an electric motor produced in Hairpin technology is avoided by the welding spatter resulting in the welding of the hairpins. Furthermore, a method is to be specified, with which an impairment of the operation of an electric motor produced in Hairpin technology is avoided by the resulting during welding of the hairpins weld spatter.

To achieve this object, the invention provides a splash guard for use in welding wires in the manufacture of a spooled component of an electrical machine comprising at least two cover members shaped to collectively form a closed chamber for receiving a weld a wire is welded to another member or wire so that the space outside the chamber is protected from spatter, at least one of the cover members being movable to open and close the chamber; and a transport device for removing the spatter from the chamber.

As a result, the environment of the weld is covered and the component to be produced is not affected by the welding process. During the production of a stator, the stator space as well as the hairpins and the switching element are protected from the welding spatter during the respective welding processes.

Advantageously, the cover elements are designed as shells or half-shells to encase the welding point in the closed state during welding. In the closed state, the cover elements preferably form a sealed chamber around the weld. As a result, spatter can not escape from the chamber.

The welding beads produced during welding generally apply up to 1 mm around the weld, for example, in the case of a welded hairpin pair or interconnecting element. Due to the two-part design of the cover or shells or half shells in which at least one of these elements is movable, the weld bead produced during welding is not damaged when removing the splash guard. This means that after the welding process, the cover elements or shells can open again to prevent damage to the weld bead.

In particular, the cover elements are designed to be one-sided, two-sided or multi-sided movable.

The cover elements are advantageously approximated in shape to the path of a welding beam, in particular a welding laser beam.

For example, the cover elements in the closed state can cover one or more welds.

Advantageously, the cover elements are designed such that the weld spatter is collected from the chamber before being transported away. In particular, they are inclined at a lower portion designed to collect the spatter before removal from the chamber.

Preferably, the cover elements are configured such that they clamp the ends of the wire or of the further element for welding. As a result, it is possible to dispense with a separate clamping device. This is particularly relevant for individual special hairpins, such as hairpins, which are welded with contact elements.

The transport device is preferably designed as a suction device for sucking the weld spatter from the chamber. As a result, spatters collected in the trays or cover elements can be removed.

In particular, the weld spatter is removed by means of a pressure difference from the interior of the chamber. The spatters may be removed from the chamber during and / or after the welding operation.

Advantageously, the transport device comprises a nozzle for deflecting the weld spatter in a defined direction. In combination with a suction, which sucks the spatter in the deflected direction, there is a particularly effective removal of the spatter from the chamber.

For example, a wire with another wire and / or with a Verschaltelement welded as a further element at the weld.

In particular, two wires, which are configured as hairpins for producing coils for electric motors, are welded together at their ends or leg ends.

The wire is designed in particular as a hairpin for the production of coils for electric motors, the end of which is welded to a Verschaltelement as the further element.

Advantageously, the splash guard is designed tiltable to allow the spatter to fall out. The entire device or the entire splash guard can be tilted to let fall, for example, not sucked or not transported away spatter. This prevents them from falling into the stator.

Preferably, the transport device comprises a device for tilting the splash guard to selectively drop the weld spatter.

• Positionieren eines Drahts und eines weiteren Drahts oder Elements zum gegenseitigen Verschweißen an einer Schweißstelle;
• Bereitstellen von mindestens zwei Abdeckelementen, die derart geformt sind, dass sie gemeinsam eine geschlossene Kammer zur Aufnahme der Schweißstelle bilden;
• Positionieren der mindestens zwei Abdeckelemente derart, dass sich die Schweißstelle innerhalb der Kammer befindet, so dass der Raum außerhalb der Kammer beim Schweißen vor Schweißspritzern geschützt ist;
• Verschweißen des Drahts mit dem weiteren Draht oder Element an der Schweißstelle;
• Abtransportieren der Schweißspritzer aus der Kammer;
• Öffnen der Kammer nach Beendigung des Schweißvorgangs.

The method according to the invention for welding wires in the manufacture of a coil-provided component of an electric machine comprises the steps:

• Positioning a wire and another wire or member for welding together at a weld;
• Providing at least two cover members shaped to collectively form a closed chamber for receiving the weld;
• Positioning the at least two cover members such that the weld location is within the chamber such that the space outside the chamber is protected from spatter during welding;
• Welding the wire to the other wire or element at the weld;
• Removing the spatter from the chamber;
• Opening the chamber after completion of the welding process.

Preferably, the cover elements are designed as shells or half shells. In particular, they enclose the weld when closed when welding.

Advantageously, the cover elements form a sealed chamber in the closed state.

Preferably, the cover elements for opening or closing the chamber on one side, two-sided or multi-sided process.

For example, the cover elements are approximated in shape to the path of a welding laser beam.

Advantageously, the cover elements are positioned for welding so that they cover one or more welds in the closed state.

Preferably, the weld spatter is sucked out of the chamber. For example, the spatters are removed from the interior of the chamber by means of a pressure difference. In particular, the spatter can be removed during and / or after the welding process from the chamber.

Advantageously, the spatter is deflected with a nozzle in a defined direction.

At the weld, the wire is welded, for example, with another wire and / or with a Verschaltelement as another element.

Preferably, two wires, which are designed as hairpins for the production of stators for electric motors, welded together at the ends or leg ends.

For example, the wire is designed as a hairpin for the production of stators for electric motors, the end of which is welded to a Verschaltelement as another element.

Advantageously, the spatters are collected from the chamber before being removed. The cover elements and / or the chamber are tilted, for example, to drop the spatter from the chamber.

The cover elements can also be used, for example, for tensioning the wire and / or the further element or wire.

Advantages and details of the invention, which are mentioned in connection with the splash protection according to the invention, also apply to the method according to the invention, as well as advantages and details, which are mentioned in connection with the inventive method, also apply to the splash protection according to the invention.

• 1 eine schematische Darstellung eines erfindungsgemäßen Spritzschutzes als Schnittansicht;
• 2a und 2b eine schematische Darstellung eines bekannten Hairpins in einer Seitenansicht und in einer Ansicht von oben auf das Dach des Hairpins;
• 3 eine schematische Darstellung eines Statorelements mit einer Vielzahl von Nuten zur Aufnahme von Hairpins;
• 4 schematisch ein Beispiel einer Bahn eines Schweißstrahls innerhalb eines erfindungsgemäßen Spritzschutzes;
• 5 eine schematische Darstellung eines erfindungsgemäßen Spritzschutzes mit einer Absaugvorrichtung in einer Schnittansicht;
• 6 eine schematische Darstellung eines erfindungsgemäßen Spritzschutzes mit einer Düse in einer Schnittansicht;
• 7 eine schematische Darstellung eines erfindungsgemäßen Spritzschutzes mit einem speziell geformten Sammelbereich in einer Schnittansicht;
• 8a und 8b eine schematische Darstellung eines erfindungsgemäßen Spritzschutzes in zwei verschiedenen bevorzugten Ausführungsformen als Ansicht von oben.

Hereinafter, embodiments of the invention will be described with reference to the figures. Showing:

• 1 a schematic representation of a splash guard according to the invention as a sectional view;
• 2a and 2 B a schematic representation of a known hairpin in a side view and in a view from above on the roof of the hairpin;
• 3 a schematic representation of a stator with a plurality of grooves for receiving hairpins;
• 4 schematically an example of a path of a welding beam within a splash guard according to the invention;
• 5 a schematic representation of a splash guard according to the invention with a suction device in a sectional view;
• 6 a schematic representation of a splash guard according to the invention with a nozzle in a sectional view;
• 7 a schematic representation of a splash guard according to the invention with a specially shaped collecting area in a sectional view;
• 8a and 8b a schematic representation of a splash guard according to the invention in two different preferred embodiments as a top view.

In 1 a splash guard according to a preferred embodiment of the invention is shown as a sectional view. The splash guard comprises two cover elements 10a . 10b , which are shaped so that together they form a closed chamber 20 for receiving a weld 5 form at the at a welding process, a wire 1a with another element 1b is welded. In this case, the other element 1b also be a wire or wire end, in particular also a connection conductor of a Verschaltelements.

The two cover elements 10a . 10b are shaped so that the space outside the chamber 20 in front of sweat splashes 7 , which are created during the welding process, is protected. At least one of the cover elements 10a . 10b is movable to the chamber 20 to open and close. A transport device serves to remove the spatter 7 out of the chamber 20 ,

The cover elements 10a . 10b are designed as bowls or half-shells. When closed, the cover elements encase 10a . 10b the weld 5 during the welding process. This will create a tight chamber 20 around the weld 5 generated, from which the spatter 7 can not escape.

The cover elements 10a . 10b are shaped so that at the bottom of the chamber 20 an opening 21 is formed, through which the elements or wires to be welded together 1a . 1b with their ends in the chamber 20 protrude and border each other.

In the welding process, for example, one end of a hairpin is welded to the end of another hairpin. In this case, the wire 1a and the wire 1b each formed by the end of a hairpin, such as in 2a and 2 B is shown. In particular, in this way one leg of a hairpin is welded to one leg of another hairpin.

In other cases, the wire becomes welded 1a made by the end of a hairpin with another element 1b welded, which is formed by a Verschaltelement or a connection conductor of a Verschaltelements. The interconnection element is used to connect the three phases of a stator to power electronics. For this purpose, the Verschaltelement is welded to the hairpins of the stator.

That is, at the weld 5 becomes a wire 1a with another wire 1b and / or with a Verschaltelement as another element 1b welded.

During welding process form at the weld 5 Weld beads which can be applied around the welded hairpin pair or around the end of the paneling element or its connection conductor up to 1mm. Characterized in that at least one of the cover elements designed as shells 10a . 10b is movable to the chamber 20 To open and close, after the welding process when removing the splash guard, the generated weld bead is not damaged.

At the same time a tight seal of the chamber during welding 20 on the elements or wires to be welded together 1a . 1b allows.

In the preferred embodiment of the invention shown here are the cover elements 10a . 10b executed in two parts and form half shells, of which one half shell 10a opposite the other half shell 10b is moving to the opening 21 the chamber 20 to extend so that the splash guard can be removed after the welding process, without damaging the generated weld bead.

But it is also possible, the cover or shells 10a . 10b in more than two parts.

The individual cover elements 10a . 10b can be designed to be one-sided, two-sided or multi-sided movable to the chamber 20 to open and the splash guard from the weld 5 remove without welding at the weld 5 damaged weld bead.

During the welding process, the shells or cover elements 10a . 10b closed and form a tight chamber 20 , After the welding process, the shells or cover elements 10a . 10b reopened so that damage to the weld bead is prevented when removing the splash guard.

In 4 is schematically an example of a web 40 a welding beam within the splash guard according to the invention. In this example, the web is 40 a laser beam path of a welding laser beam. The cover elements 10a . 10b are in shape to the train 40 approximated to the welding laser beam used for welding. Due to this shape of the cover 10a . 10b there is the train 40 the welding beam during the welding process inside the chamber 20 so that the cover elements 10a . 10b the train 40 encase the welding beam and as close as possible to the web 40 adjoin the welding beam.

The distance between the cover elements 10a . 10b increases from the bottom of the chamber 20 to its top, ie from bottom to top, so that it is in the area of the weld 5 at the bottom of the chamber 20 as low as possible. Towards the top, the chamber widens 20 to bring the welding beam at different angles from above to the welding point 5 respectively. In the embodiment shown here, the side walls 10a . 10b V-shaped arranged and in this way to the web 40 of the welding beam approximated.

The welding spatter resulting from the welding process 7 collect by gravity at the bottom of the chamber 20 (please refer 1 ) and can be removed from there.

Due to the approach of the cover elements or shells 10a . 10b to the train 40 the welding beam or laser welding beam is achieved that the splash guard forms no or only slightly disturbing contours, in particular for the welding beam, components and clamping units, which are necessary in particular for positioning and tensioning the hairpins in order to weld them.

In particular, when welding a Verschaltelements to the connection there is a very large space problem, which is due to its complex contour. But also in the process for welding the hairpins there is a considerable space problem due to the size and spacing of the welds to each other and their variety due to the very tight packing of hairpins in extremely small space. By the approximation of the shape of the cover 10a . 10b to the train 40 of the welding beam and by creating a sealed chamber 20 around the weld 5 Despite the considerable installation space problem, it provides effective splash protection against spatter 7 so that they do not get into the stator space.

5 shows the splash guard according to the invention according to a further embodiment of the invention, wherein for the removal of spatter 7 out of the chamber 20 a suction device 30 is provided, which forms a transport device for removal.

The suction device 30 is through an opening in the cover 10a formed, which is near the weld 5 located. During or after the welding process, the suction of the spatter can 7 out of the chamber 20 near the weld 5 respectively.

6 shows a further preferred embodiment of the invention, in addition to the suction device 30 a nozzle 31 is provided. For removing the spatter 7 out of the chamber 20 In this case, air is supplied from the outside through the nozzle 31 in the chamber 20 guided.

The nozzle 31 is near the weld 5 arranged and in particular directed to this. The spatter 7 are entrained by the airflow and on the opposite side of the chamber 20 as close to the weld as possible 5 through the suction device 30 aspirated.

The nozzle 31 deflects the spatter 7 in a defined direction and there is a suction of the spatter in the deflected direction, where the suction device 30 is arranged and the spatter 7 sucks.

The suction device 30 thus forms, alone or in combination with the nozzle 31 , the transport device for the removal of the welding process spatter 7 out of the chamber 20 ,

In particular, the weld spatter 7 by means of a pressure difference from the interior of the chamber 20 away. Removing the spatter 7 out of the chamber 20 Can be done during or after the welding process.

The extraction of the spatter 7 can in particular also at the opening of the shells or cover elements 10a . 10b in the direction of the welding beam or in the laser direction.

In 7 schematically shown an inventive splash guard according to another embodiment of the invention, wherein the lower walls or sections 11 the cover elements 10a . 10b are formed obliquely. This can eg be dispensed with an extraction. If an extraction takes place, the removal of the spatter is supported.

The sections 11 Make an angle to the horizontal, so that the weld spatter 7 in defined areas at the bottom of the chamber 20 collect. For this purpose form the lower sections 11 the cover elements 10a . 10b with its side walls an acute angle.

8a and 8b show a splash guard according to the invention in two different embodiments as a top view. At the bottom of the chamber 20 There are one or more openings 21 through which the two wires or elements to be welded 1a . 1b with their ends in the interior of the chamber 20 protrude from below. The cover elements 10a . 10b form side walls of the chamber 20 which converge from top to bottom and are V-shaped when in the closed state.

While at the in 8b shown example of the splash guard only a spot weld or a weld 5 covering takes place at the in 8a shown example, a cover of multiple welds through the cover 10a . 10b ,

In the in 8a In the example shown, two pin pairs to be welded are covered at their welding point during the welding process. But it is also possible that the splash guard according to the invention covers a larger number of welds to escape of spatters from the chamber 20 to prevent during the welding process.

The transport device for removing the spatter 7 out of the chamber 20 may in particular also be formed by a device for tilting the splash guard. In this case, the welding spatter is to be removed 7 out of the chamber 20 the splash guard tiltable designed so that the spatter 7 when tilting out of the chamber 20 fall out.

Depending on the embodiment, the cover elements 10a . 10b also be designed so that they for tensioning the wire ends or to be welded wires or elements 1a . 1b can be used. In this way, can be dispensed with a separate clamping device. In particular, this is relevant to certain hairpins, for example, those that are welded to the contact or Verschaltelementen.

The following is an example of a method according to the invention for welding wires in the manufacture of a coil-provided component of an electrical machine on the basis of 1 and 4 to 8th described.

First, a wire 1a and another element 1b , which in particular can also be a wire, for mutual welding at a weld 5 positioned. At least two cover elements 10a . 10b , which are shaped so that they together form a closed chamber 20 for receiving the weld 5 form are provided. The at least two cover elements 10a . 10b are positioned so that during the welding process, the weld 5 inside the chamber 20 is located, leaving the room outside the chamber 20 when welding against spatter 7 is protected (see for example 1 ). Now a welding of the wire takes place 1a with the other element or wire 1b at the weld 5 (please refer 4 ). During or after welding, the weld spatters 7 out of the chamber 20 removed. After completion of the welding process, the chamber 20 open.

When positioning the cover elements 10a . 10b is the chamber 20 initially opened. Subsequently, the chamber 20 closed. This will be one or more of the cover elements 10a . 10b emotional. In the closed state of the cover 10a . 10b is the chamber 20 tight, so no spatter 7 out of the chamber 20 can escape.

To open or close the chamber 20 become the cover elements 10a . 10b for example, one-sided, two-sided or multi-sided procedure.

During welding, the cover elements 10a . 10b now positioned so that they are closed and one or more welds 5 cover.

The spatter 7 be out of the chamber before their removal 20 collected and then transported away collected. The removal can also take place during the process or the welding process.

The removal of welding spatter 7 out of the chamber 20 for example, by the spatter 7 with a suction device 30 out of the chamber 20 be sucked off (see 5 ). The extraction of the spatter 7 especially in the vicinity of the weld.

The removal of welding spatter 7 out of the chamber 20 can for example also by means of a nozzle 31 done, which the spatter 7 distracts in a defined direction. It is particularly advantageous, the suction of the spatter 7 with the nozzle 31 to combine. (please refer 6 ).

The removal of welding spatter 7 out of the chamber 20 For example, by tilting the chamber 20 or the cover 10a . 10b done so that the spatter 7 out of the chamber 20 fall out.

The different ways of removing the spatter 7 out of the chamber 20 can be combined in different ways as needed.

According to a particular embodiment of the method according to the invention, the elements to be welded together, that is the wire 1a as well as the further element 1b , which is also a wire or a Verschaltelementanschluss, through the cover 10a . 10b tensioned before the welding process. As a result, it is possible to dispense with a separate clamping device.

The two wires to be welded 1a . 1b Elements are, for example, the ends or legs of hairpins for producing stators for electric motors. But it can also be one of the elements to be welded a designed as a hairpin wire 1a for the production of stators for electric motors whose end with a Verschaltelement as another element 1b is welded.

Depending on the arrangement and number of welds, the splash guard according to the invention may vary in its shape and design. For example, it is possible to design the splash guard to be positioned and closed at a single spot weld to perform the welding operation. It is then opened and removed from the weld without damaging the weld beads. Now he can be positioned at another weld to repeat the process there.

It is also possible to design the splash guard so that it can be positioned over multiple welds and by closing its cover 10a . 10b a chamber 20 forms, which covers several welds at the same time and seals so that the welding process at these welds no spatter 7 in the room outside the chamber 20 can reach. After the welding operation of the respective number of welds, the splash guard is opened so that it is removed from the welds without damaging the weld beads.

Subsequently, the splash guard can be moved to another arrangement of welds and positioned there to perform the welding process there and the environment from spatters 7 to protect.

Depending on the application and the number of welding positions, the chamber 20 Seen from above, for example, rectangular, arcuate or annular designed to be adapted in geometry to the arrangement of one or more welds and to minimize the space required for this purpose.

LIST OF REFERENCE NUMBERS

1a

wire

1b

Wire or element

5

weld

7

spatter

10a, 10b

Covering elements or shells

11

lower portions of the cover

20

chamber

21

passage aperture

30

Transport device (for example suction device)

31

jet

40

Track of a welding beam

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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

• DE 102018103926 [0011]
• DE 102018103929 [0011]
• DE 102018103930 [0011]
• DE 102018103100 [0011]

Claims (15)

A splash guard for use in welding wires in the manufacture of a coiled component of an electrical machine, comprising at least two cover elements (10a, 10b) shaped in this way that together they form a closed chamber (20) for receiving a weld (5) at which a wire (1a) is welded to another element or wire (1b), so that the space outside the chamber (20) is protected from spatter ( 7) is protected, wherein at least one of the cover members (10a, 10b) is movable to open and close the chamber (20); and a transport device (30) for removing the spatter from the chamber (20). Splash guard after Claim 1 , characterized in that the cover elements (10a, 10b) are formed as shells or half-shells to enclose the weld (5) in the closed state during welding. Splash guard after Claim 1 or 2 , characterized in that the cover elements (10a, 10b) 3.1. form a sealed chamber (20) when closed, and / or 3.2. one-sided, two-sided or multi-sided movable, and / or 3.3. are approximated in shape to the web (40) of a welding laser beam, and / or 3.4. Cover one or more welds (5) when closed, and / or 3.5. are formed such that the welding spatters (7) are collected from the chamber (20) before being transported away, and / or 3.6. are inclined at a lower portion to collect the weld spatters (7) before being removed from the chamber (20), and / or 3.7. are configured such that they clamp the ends of the wire (1a) and the further element or wire (1b) for welding. Splash guard according to one of the preceding claims, characterized in that the transport device (30) 4.1. is designed as a suction device for sucking the weld spatter (7) from the chamber (20), and / or 4.2. the spatter (7) by means of a pressure difference from the interior of the chamber (20) removed, and / or 4.3. the spatters (7) are removed from the chamber (20) during and / or after the welding operation. Splash guard according to one of the preceding claims, characterized in that the transport device (30) comprises a nozzle (31) for deflecting the spatter in a defined direction. Splash guard according to one of the preceding claims, characterized in that at the weld (5) a wire (1a) with another wire (1b) and / or with a Verschaltelement as a further element (1b) is welded. Splash guard according to one of the preceding claims, characterized in that 7.1. two wires (1a, 1b), which are designed as hairpins for the production of coils for electric motors, at the ends of which are welded together, and / or 7.2. the wire (1a) is designed as a hairpin for the production of coils for electric motors, the end of which is welded to a connection element as the further element (1b), and / or 7.3. the splash guard is tiltable to allow the spatter (7) to fall out, and / or 7.4. the transport device comprises a device for tilting the splash guard to allow the spatter (7) to fall out. A method of welding wires in the manufacture of a coiled component of an electrical machine, comprising the steps of: Positioning a wire (1a) and another element or wire (1b) for welding together at a weld (5); Providing at least two cover elements (10a, 10b) which are shaped such that together they form a closed chamber (20) for receiving the weld (5), Positioning the at least two cover members (10a, 10b) such that the weld (5) is within the chamber (20) so that the space outside the chamber (20) is protected from welding spatter (7) during welding; Welding the wire (1a) to the further element or wire (1b) at the weld (5); Removing the spatter (7) from the chamber (20); Opening the chamber (20) after completion of the welding process. Method according to Claim 8 , characterized in that the cover elements (10a, 10b) are formed as shells or half-shells and in the closed state during welding, the weld (5) encase. Method according to Claim 8 or 9 , characterized in that the cover elements (10a, 10b) 10.1. form a sealed chamber (20) when closed, and / or 10.2. for opening or closing the chamber (20) are unilaterally, two-sided or multi-sided process, and / or 10.3. are approximated in shape to the web (40) of a welding or welding laser beam, and / or 10.4. be positioned for welding so that they cover one or more welds (5) in the closed state. Method according to one of Claims 8 to 10 , characterized in that 11.1. the welding spatters (7) are sucked out of the chamber (20), and / or 11.2. the weld spatters (7) are removed from the interior of the chamber (20) by means of a pressure difference, and / or 11.3. the welding spatters (7) are removed from the chamber (20) during and / or after the welding operation. Method according to one of Claims 8 to 11 , characterized in that the welding spatters (7) are deflected with a nozzle (31) in a defined direction. Method according to one of Claims 8 to 12 , characterized in that at the weld (5) of the wire (1a) with another wire (1b) and / or with a Verschaltelement as a further element (1b) is welded. Method according to one of Claims 8 to 13 , characterized in that 14.1. two wires (1a, 1b), which are designed as hairpins for the production of stators for electric motors, at the ends of which are welded together, and / or 14.2. the wire (1a) is designed as a hairpin for the production of stators for electric motors, the end of which is welded to a switching element as a further element (1b). Method according to one of Claims 8 to 14 , characterized in that 15.1. the weld spatters (7) are collected from the chamber (20) before being transported away, and / or 15.2. the cover members (10a, 10b) and / or the chamber (20) are tilted to drop the spatter (7) from the chamber (20), and / or 15.3. the covering elements (10a, 10b) are used for tensioning the wire (1a) and / or the further element or wire (1b).

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