KR20160133424A - Consumable welding wire, preferably mig/mag, and relating manufacturing process - Google Patents

Abstract

The electrode rod 130 includes a thread-like element extending along the longitudinal axis X-X and made of a first base material; At least one conductive filament (3); At least one sputter suppression element. The thread-like element comprises a channel (4) extending along the longitudinal axis with a helical path. The conductive element 3 is disposed inside the channel 4 and the sputter suppression element is disposed inside the channel 4. [

Description

Consumable welding wire, preferably MIG / MAG, and related manufacturing methods {CONSUMABLE WELDING WIRE, PREFERABLY MIG / MAG, AND RELATING MANUFACTURING PROCESS}

The present invention relates to the field of welding electrodes, in particular, the present invention relates to consumable electrodes, preferably MIG / MAG welding, and each manufacturing method.

As is well known, gas metal arc welding (GMAW) (sometimes referred to as MAG (Metal-arc Inert Gas) in its subtype in the case of inert gas and MAG Metal-arc active gas) is a semi-automatic or automatic process in which a continuous and consumable electrode (commonly referred to as a "welding electrode") and a shielding gas are supplied through a welding gun.

In Figures 1 and 2, an apparatus 10 for GMAW welding is shown by way of example in the prior art.

The apparatus 10 includes a power supply 2, a bar feed unit 4, a system 6 for supplying shielding gas, and a torch cable (not shown) for supplying power and shielding gas and for feeding a welding rod to the workpiece 20 8). Typically, the torch cable 8 is typically formed as a flexible sheath having a length of at least 3 meters, and the torch cable is also as flexible as possible to take a relatively narrow and curved shape. Generally, in order to prevent the welding rod from being twisted around the torch cable 8, the welding rod progresses inside a flexible sheath made of a metal wire that is wound tightly and spirally, the inner diameter of the flexible sheath .

The torch cable 8 has a welding torch 34 at its end. As shown in FIG. 2, the welding torch 34 includes a gas nozzle 35 and a contact tip 36, through which the electrode is guided adjacent to the workpiece.

The torch cable 8 includes therein a duct 37 for supplying a shielding gas to the welding torch 34, a power supply cable 33 and a consumable electrode 32 inside thereof.

The shielding gas 38 is supplied to the space surrounded by the gas nozzle 35 and the contact tip 36 through the duct 37.

Applicants have come to appreciate that relatively high strength is always required to move the consumable electrode from the feed reel to the welding torch 34 via the torch cable, due to the length and flexibility of the torch cable.

Applicants have also recognized that spills or spatter occur during the welding process due to drawing and / or residues of the copper coating process or soap present on the surface of the electrode. These jets become particles of metallic and non-metallic materials that are adhered to the contact tip and the gas nozzle, and become a drop of molten metal adhering to the workpiece to be welded, resulting in a subsequent cleaning process being required, Resulting in welding lines of low quality level.

The Applicant has thus found a need to provide a new electrode for MIG / MAG welding, in particular, which can minimize the creation of jetties and / or splashes of metal material during welding, or which can be significantly reduced in any way.

The Applicant has also found that it is possible to provide a process for the production of a welding rod, in particular a consumable welding rod, preferably for MIG / MAG welding, which can significantly reduce the generation of jetting and / And the need to provide them.

Applicants have also found a need to provide a machine for practicing the method according to the invention.

Thus, in a first aspect, the present invention relates to a welding rod,

A filiform element extending along the longitudinal axis and made of a first base material;

At least one conductive filament;

- at least one sputter suppressing element

Lt; / RTI >

The thread-like element comprising a channel extending in a direction parallel to the longitudinal axis,

Wherein at least one of said conductive filaments is disposed inside said longitudinal channel,

At least one of the sputter suppression elements is disposed inside the channel.

Within the scope of the present invention,

"Wire rod" means a rod of metallic material, such as semi-finished steel, having a diameter greater than 5 mm and having a generally circular cross-section;

"Spraying" means a reduction of the liquid in the drop and / or the microparticle;

In the expression "made of aluminum" or "made of copper ", aluminum or each copper or metal material means an alloy element present in a percentage lower than 5% by weight, not to mention impurities.

In this aspect, the invention may have at least one of the features described below.

Advantageously, the welding rod is a welding rod for MIG welding or MAG welding or SAW welding.

Conveniently, the conductive filament is a metal.

Preferably, the first base material is selected from low carbon steels, low alloy steels, stainless steels, as commonly used for GMAW welding, GTAW welding, and SAW welding.

In the case of an application where a piece with an iron-based base material is to be welded, the first base material according to the present invention may be a low-carbon steel, a low alloy steel, a low alloy steel, Stainless steel.

Conveniently, the at least one conductive filament is made of aluminum.

Alternatively, at least one of the conductive filaments is made of copper.

Also alternatively, at least one of the conductive filaments is made of a copper-aluminum alloy. Preferably, the copper-aluminum alloy is ER CuAl-Al according to AWS A5.7, and S Cu6100 according to EN14640.

AWS A5.7 is the US code for welding materials [AWS is an abbreviation for the American Welding Society], and EN14640 is the respective European code.

Preferably, the conductive filament has a diameter comprised in the range of 0.20 mm to 0.35 mm.

Conveniently, the at least one sputter inhibiting element is selected from alkali metals, molybdenum, tungsten and graphite, including both its elemental form and its salt and complex molecule forms.

Preferably, the at least one conductive filament is made of aluminum and the spatters suppressing material is selected from potassium, lithium, cesium, graphite, molybdenum and tungsten, and both the elemental form and its salt and complex molecule form do.

Alternatively, the at least one conductive filament is made of copper and the sputter inhibiting material comprises at least one of a solution of potassium, cesium, graphite, molybdenum and tungsten.

Alternatively, the conductive filament is made of a copper-aluminum alloy and the spatters suppressing material is selected from potassium, lithium, cesium, graphite, molybdenum and tungsten, and both its elemental form and its salt and complex molecule form do.

Conveniently, the channel has a helical extension about the longitudinal axis X-X.

Advantageously, the channel has a helical shape which is adapted to make at least one complete revolution every 4 meters of the thread-like element.

According to another aspect, the present invention relates to a method of manufacturing an electrode as described above,

- forming a channel in a wire rod made of a first base material;

Depositing a predetermined amount of sputter inhibiting element;

Depositing at least one conductive filament in the channel;

- warping the wire rod to at least partially anchor at least one of the conductive filament and the at least one sputter suppression element inside the channel

.

Preferably, the step of warping the wire rod comprises a rolling step.

Conveniently, there is a drawing step or a second rolling step after the warping step so that the electrode has a predetermined diameter smaller than the starting diameter of the wire rod.

Advantageously, depositing a predetermined amount of sputter inhibiting material comprises spraying or dripping said sputter inhibiting material onto a longitudinal portion of the wire rod comprising said longitudinal channel.

Preferably, at least one of the sputter inhibiting elements is deposited in the channel as dissolved in the solution.

Conveniently, depositing the at least one conductive filament comprises depositing a substantially continuous conductive filament, preferably made of aluminum and / or copper and / or copper-aluminum alloy, wherein the copper-aluminum The alloys are preferably ER CuAl-Al according to AWS A5.7 and S Cu6100 according to EN14640.

Preferably, after the step of deforming the wire rod so as to at least partly fix at least one of the conductive filament and the at least one sputter inhibiting element in the channel so that the conductive filament is disposed along the spiral path, There is a step to apply twisting.

Additional features and advantages of the present invention will become more apparent from the detailed description of a few preferred embodiments of a novel electrode and a method of manufacturing the same, without limitation.
Such descriptions are set forth below with reference to the accompanying drawings, which are provided for purposes of illustration only and not for limitation.
Figures 1 and 2 are schematic diagrams of a prior art GMAW welding apparatus;
Fig. 3 shows a method of manufacturing a welding rod, preferably a consumable welding rod, preferably for MIG / MAG welding, which can significantly reduce the generation of spots and / or splashes of metallic material during welding in accordance with the present invention. ≪ / RTI >
Figs. 4A-4I illustrate an embodiment of a method for manufacturing a welding electrode, particularly a consumable electrode, for MIG / MAG welding, which is capable of significantly reducing the generation of spots and / A schematic of several steps of the method;
Figures 5A-5D are schematic views of cross sections of the electrode during various stages of the manufacturing process.

1 and 2, an apparatus 10 for GMAW welding is shown as an example to illustrate the type of application of a welding electrode according to the present invention.

The apparatus 10 includes a power supply 2, a bar feed unit 4, a system 6 for supplying shielding gas, and a torch cable (not shown) for supplying power and shielding gas and for feeding a welding rod to the workpiece 20 8). Typically, the torch cable 8 is typically formed as a flexible sheath having a length of at least 3 meters, and the torch cable is also as flexible as possible to take a relatively narrow and curved shape. Generally, in order to prevent the welding rod from being twisted around the torch cable 8, the welding rod progresses inside a flexible sheath made of a metal wire that is wound tightly and spirally, the inner diameter of the flexible sheath .

The torch cable 8 has a welding torch 34 at its end. As shown in FIG. 2, the welding torch 34 includes a gas nozzle 35 and a contact tip 36, through which the electrode is guided next to the workpiece.

The torch cable 8 includes therein a duct 37 for supplying a shielding gas to the welding torch 34, a power supply cable 33 and a consumable electrode 32 inside thereof.

The shielding gas 38 is supplied to the space surrounded by the gas nozzle 35 and the contact tip 36 through the duct 37.

In Figures 4A-4I, steps of a method for manufacturing a consumable electrode, preferably a welding electrode for MIG / MAG welding, are shown, which can solve the above-mentioned problems of the consumable electrode used in the prior art.

Initially, a wire rod 12 is provided that represents the details of the finished product (e.g., ER70S-2, ER70S-6 for the AWS A5.18 specification).

The wire rod 12 can then be cleaned by line pickling or batching, or by mechanical scaling to remove the surface oxide, as shown in FIG. 4A.

Accordingly, the wire rod 12 is sized by rolling or drawing to obtain the base rod 13 whose shape and size are constant.

At that point, as shown in Fig. 4C, the surface of the obtained base rods 13 may undergo preparatory steps intended to remove the residue of the drawing compound or change its shape and / or porosity.

4 (d), a longitudinal recess 4 is formed on the surface of the base rod 13, for example, by a forming roll or a molding die plate.

If necessary, after possible further cleaning, the foundation rods progress while depositing a predetermined amount of one or more sputter suppression elements, as shown in Figure 4e.

Preferably, the sputter suppression element is deposited by advancing the base rods 13 along the longitudinal direction of the foundation rods under a spray nozzle or loading device that deposits fine droplets on the at least one sputter inhibiting element.

The sputter inhibiting element may be selected from alkali metals, molybdenum, tungsten, and graphite and may be provided in the form of its elemental forms and complex molecules with its salts. The sputter inhibiting element is deposited in a channel as dissolved in the solution and / or in a fluid-based mixture comprising the inhibiting element.

These suppression elements can be applied to the inner surface of the longitudinal channel 4. The nominal ratios of these materials will be identified in the finished product, i. E.

The foregoing ratios refer to elements in the finished product and do not indicate salts in the solution deposited in the channel during the manufacturing process.

In another embodiment, for example referring to potassium (K), it is contemplated that potassium is present as an element in the finished product, and it is not contemplated that potassium tetraborate, for example, which may be deposited in the channel during the manufacturing process, dissolves in water Do not.

Alternatively, the spatula suppression element can be provided as one of the components of the conductive filament 3.

At this point, the base rod proceeds while inserting at least one conductive filament 3 into the longitudinal channel 4.

This insertion is accomplished by continuously depositing the conductive filament 3 along the entire longitudinal channel 4, as shown in Figure 4f.

Insertion of the conductive filament 3 into the longitudinal channel 4 is effected in such a way that the conductive filament 3 is perfectly received inside the recess of the longitudinal channel 4.

In one embodiment, the conductive filament 3 is made of aluminum, preferably 0.05 to 0.10% by weight, relative to the foundation rod 13, prior to its deposition, when a particular application may be required, Corresponding to aluminum, of 0.20-0.35 mm, more preferably 0.25 mm to 0.30 mm, for example 0.28 mm.

Alternatively, the filament 3 may be made of elemental copper. Alternatively, the filament 3 may be made of, or contain at least one of, silver, molybdenum, tungsten, and graphene or graphite.

In the embodiment shown in the figures, the conductive filament 3 has a circular cross-section, but the conductive filament can have other shapes, such as flat (strip), rectangular, triangular and similar shapes Lt; / RTI >

At this point, as shown in Fig. 4G, the base rods 13 are fixed so that the conductive filaments 3 can be at least partially fixed and the one or more spatters suppressing elements are fixed in the longitudinal channels 4 And the like.

For this purpose, for example, the base rods 13 can run between two rolling mills or alternatively between two or more die plates.

Then, the foundation rods 13 are twisted so that the recesses 4 are arranged along the spiral path with respect to the longitudinal axis indicated by the axis X-X itself in the figure. The twisting applied to the electrode 13 is such that the recess 4 and the conductive filament 3 make at least one complete revolution about the longitudinal axis XX of the electrode itself every 5 meters of the length of the electrode . In this way, during welding, ions released from the metal filament 3 and from the sputter suppression element are generated and deposited on the entire inner surface of the contact tip present in the welding torch.

Finally, the base rods 13 can be drawn or rolled until they reach the desired final cross-sectional dimension, as shown in Fig. 4i.

5A-5D, cross-sections of the base rods and filaments 3 are shown during various stages of the manufacturing process.

Specifically, FIG. 5A shows a cross-sectional view of the rod immediately after the step of implementing the longitudinal channel 4 in the enveloped portion where the longitudinal channel appears to be empty, as can be seen.

In Fig. 5b, the rod 13 is shown after the deposition step of the conductive filament 3, as shown in the enlarged encircling portion in which the channel 4 has the conductive filament 3 inside thereof.

In this step, the channel 4 has a cross section larger than the cross section of the conductive filament 3, and the side wall of the longitudinal channel 4 is separated from the conductive filament 3.

In Fig. 5c with respect to the channel, the base rods 13 after deposition of the sputter suppressing element, preferably sprayed below the metal conductive filaments 3, are shown.

In another aspect, the spatula suppression element is configured such that the conductive filament 3 is inserted and the spatula suppression element is located at the interface between the wall of the channel 4 and the conductive filament 3, For example, in the solution, before it is at the lower interface between the lower surface of the conductive filament 3 and the lower surface of the conductive filament 3.

5c the base rods 13 are also warped to allow the conductive filaments 3 and at least one of the sputter suppression elements to be at least partly immobilized within the channels 4. In this way, ).

Finally, in Fig. 5D, the base rod 13 is shown in the finished electrode bar 130 as being of a desired size.

In Figure 3, by way of example, a portion of a machine 10 for performing a portion of a method of manufacturing a welding rod 130 in accordance with the present invention is shown.

In the machine 10, the wire rod 12 serving as the welding rod 130 moves forward in the direction of the arrow F.

The base rods 13 are pressed against the first forming roll 26 and the second forming roll 27 after the first removing operation of the surface oxide not shown in Fig. 3, the setting operation of the wire rods 12, Respectively.

At least one of the shaping rolls is formed on the outer surface of the base rod 13 in a longitudinal direction and on a surface which creates a channel 4 extending parallel to the longitudinal axis of the rod 13, Shape.

In the embodiment shown in Fig. 3, the first forming roll 26 and the second forming roll 27 are opposed and spaced from each other to allow the rods 13 to pass between these forming rolls.

Also, with reference to the embodiment shown in FIG. 3, the first forming roll 26 includes a circumferential prominence 30 (radially extending from its outer surface).

The prominence 30 is forcibly pressed against the surface of the base rod 13, thereby forming a channel 4 extending in the longitudinal direction. The channel 4 is shown as having a substantially rounded U-shaped cross section in Figure 5a. However, the channel 4 may have various cross-sections, such as rectangular, V-shaped, or the like, without departing from the scope of protection of the present invention.

Moreover, the size of the longitudinal channel 4 can be selected according to the size and specific shape of the material deposited in the channel and can be selected to ensure that at least a portion of the metal filament is exposed towards the surface of the resulting electrode . The shape and size of the channel 4 can be controlled by selecting the circumferential promises 30 used to form the channel 4.

On the downstream side of the forming rolls 26, 27 and also referring to the embodiment of figure 3, the base rods 13 are arranged in the channels 4 and / or on the metal filaments with a predetermined amount of one or more spatters suppressing elements And proceeds below the spray nozzle or loading device 31 which is intended to be deposited.

On the downstream side of the nozzle 31, the machine 10 provides a device 32 for depositing the conductive filament 3 in the channel 4.

A spool 33 may be provided as the device 32 and the conductive filament 3 continuously withdrawn from the spool 33 as the base rod 13 advances beneath the spool 33, 4). ≪ / RTI >

Still referring to Fig. 3, on the downstream side of the device 32, the base rods 13 are advanced through a pair of die plates 35, 36.

The die plates 35 and 36 are shaped and arranged to compress the metal rods 13 by forcing the walls of the longitudinal channels 4 inward so that the conductive filaments 3 together with the spatters suppression elements Quot;). ≪ / RTI > The cross section at this stage is shown in Figure 5c.

The metal rods and in particular the inner walls of the longitudinal channels 4 interface with the metal filaments so that the conductive filaments 3 are attached to the electrodes 13. The conductive filament 3 can be combined with the electrode 13 by a variety of methods which are intended to ensure its stable positioning in the electrode 13. [

On the downstream side of the device 32 for depositing the conductive filament 3 in the longitudinal channel 4, the base rod 13 has a torsion in relation to the electrode 13 and thus around the longitudinal axis XX The longitudinal channels 4 and thus the conductive filaments 3 are subjected to a spiral path.

The twisting applied to the electrode 13 is such that the recess 4 and the conductive filament 3 are positioned on the longitudinal axis XX of the electrode itself every 5 meters of the length of the electrode, At least one complete revolution around the circumference.

At the end of the twisting step, the electrode 13 can be placed in a reduction device 44 that reduces the diameter of the rod to a desired final size and outer profile. The cross section at this stage is shown in Figure 5d.

At this point, the electrode 13 can be cut and packed to the desired dimensions or prepared for further processing steps.

The above-described processes and machines enable the implementation of a welding rod 130, particularly an improved MIG / MAG welding rod, that produces a minimal amount of spatter during welding.

The electrode rod 130 is shown as a filiform element extending along the longitudinal axis XX and is made of a first base material and is generally made of the general details of the finished product (e.g., ER70S-2, ER70S-3, ER70S-6). The electrode 130 includes at least one conductive filament 3 and at least one sputter suppression element.

The thread-like element comprises a channel (4) extending along the longitudinal direction, and preferably the channel (4) is arranged to follow a spiral path. Preferably, the helical path completes at least one revolution about the longitudinal axis X-X of the rod every 5 meters of the length of the rod itself, preferably every 4 meters.

The conductive filament 3 is preferably disposed inside the helical channel 4, and preferably, a portion of the conductive filament may be configured to be exposed to the outside of the longitudinal channel.

The sputter suppression element is preferably positioned inside the channel 4 below the conductive filament.

Preferably, the first base material is selected from low carbon steels, low alloy steels, stainless steels, and aluminum, as is commonly used in GMAW welding, GTAW welding, and SAW welding.

Preferably, in the case of an application where a piece with an iron-based base material is welded, the first base material according to the invention may be a low carbon steel, such as those commonly used in GMAW welding, GTAW welding, and SAW welding, Low alloy steel, stainless steel.

According to the first embodiment, the filament 3 is a conductive filament made of aluminum.

Alternatively, the filament is a conductive filament made of copper. Alternatively, the filament is a conductive filament comprised of a copper-aluminum alloy.

Conveniently, the at least one sputter inhibiting element is selected from alkali metals, molybdenum, tungsten and graphite, including both its elemental form and its salt and complex molecule forms.

In an exemplary first non-limiting embodiment, the filament 3 is made of copper and has a desired weight percent of 0.23% with respect to the wire rod 12, as may be required by a particular application, for example according to AWS regulations. Corresponding to the copper of about 0.25 mm in diameter. The spatula suppression element in the form of potassium tetraborate tetrahydrate is enclosed within the longitudinal recess 4 below the copper filament 3 in an amount comprised between 50 and 200 ppm. This configuration ensures a minimum level of spatter in addition to excellent arc stability.

In another embodiment, the filament 3 is made of aluminum and the filament 3 is made of aluminum with 0.06% by weight of aluminum relative to the wire rod 12, as may be required by certain applications in accordance with the AWS regulations. Correspondingly, it has a diameter of 0.28 mm. Spatter suppression elements in the form of dried lithium tetraborate are surrounded by aluminum filaments in an amount comprised between 10 and 30 ppm. This configuration makes it possible to obtain a very uniform weld line with a minimum or zero slag and silicate isle in addition to good weldability and minimum level of spatter.

In another embodiment of the present invention, the filament 3 is made of copper and the filament 3 has a diameter of 0.25 mm. A spatula suppression element in the form of cesium carbonate and in which potassium carbonate is added in a ratio of 1: 1 is surrounded by copper filaments, and cesium is present in an amount ranging from 50 to 300 ppm. This configuration is advantageous in that, in addition to excellent weldability and a very low level of spatter during welding with an inert argon mixture, it exhibits a straight polarity at current levels within the range desired in actual welding, And enables spray welding in a pure carbon dioxide atmosphere without gas interruption.

In yet another embodiment, at least one of the filaments is made of copper and the sputter suppression element comprises a mixture of cesium and potassium.

The electrode thus produced has a reverse polarity in an argon atmosphere and has a stable arc and allows spray welding in a pure carbon dioxide atmosphere in a manner similar to that obtained so that there is no spatter.

In another embodiment, the conductive filament 3 is made of a copper-aluminum alloy and the filament 3 has a diameter of 0.20 mm. The sputter inhibiting element in the form of a mixture comprising at least one element from potassium, lithium, cesium, graphite, molybdenum and tungsten is surrounded by copper and aluminum filaments in an amount comprised between 50 and 300 ppm. This arrangement makes it possible to obtain a very uniform weld line with a minimum or zero slag and a silicate isle in addition to guaranteeing a minimum level of spatter.

The invention has been described with reference to several embodiments. Various modifications may be made to the embodiments presented in detail herein without departing from the scope of protection of the invention as defined by the following claims.

Claims (19)

As the electrode 130,
A filiform element extending along the longitudinal axis XX and made of a first base material;
At least one conductive filament (3);
- at least one sputter suppressing element
Lt; / RTI >
The thread-like element comprises a channel (4) extending along the longitudinal direction,
At least one conductive filament (3) is disposed inside the channel (4)
Wherein at least one of said sputter suppression elements is disposed inside said channel (4). The electrode of claim 1, wherein said first base material is selected from low carbon steel, low alloy steel, stainless steel, and aluminum as commonly used in GMAW welding, GTAW welding, and SAW welding. The electrode of claim 1, wherein said first base material is selected from low carbon steel, low alloy steel, stainless steel, as commonly used for GMAW welding, GTAW welding, and SAW welding. A welding electrode according to claim 1, wherein at least one said conductive filament (3) is made of aluminum. A welding electrode according to claim 1, wherein at least one said conductive filament (3) is made of copper. The electrode according to claim 1, characterized in that the at least one conductive filament (3) is a copper-aluminum alloy, preferably the copper-aluminum alloy is ER CuAl-Al according to AWS A5.7. The electrode of claim 1, wherein at least one of said conductive filaments (3) has a diameter comprised between 0.20 mm and 0.35 mm. The electrode of claim 1, wherein the at least one sputter inhibiting element is selected from alkali metals, molybdenum, tungsten, and graphite, and includes both its elemental form and its salt and complex molecule forms. 2. A method according to claim 1, wherein at least one said conductive filament (3) is made of aluminum and at least one said spatula suppressing element is selected from potassium, lithium, cesium, graphite, molybdenum and tungsten, Characterized in that both the salt and the complex molecule form are included. The method of claim 1 wherein at least one of the conductive filaments is made of copper and the sputter suppressing material comprises at least one of the following elements: potassium, lithium, cesium, graphite, molybdenum, and tungsten Welding electrode. 8. A welding electrode according to any one of claims 1 to 7, wherein at least one of the conductive filaments is made of copper and the sputter inhibiting material comprises a mixture of cesium and potassium. 3. The method of claim 1, wherein the conductive filament is made of a copper-aluminum alloy, preferably CuAl-Al according to AWD A5.7, and at least one of the spatters suppressing elements is selected from the group consisting of potassium, lithium, cesium, graphite, molybdenum Tungsten, and includes both its elemental form and its salt and complex molecule form. The electrode according to claim 1, characterized in that the channel (4) has a spiral extension around the longitudinal axis (X-X). 14. An electrode as claimed in claim 13, characterized in that the channel (4) has a helical shape so as to make at least one complete revolution every 4 meters of the thread-like element. A thread-like element extending along the longitudinal axis XX and made of a first base material;
At least one conductive filament (3);
- at least one sputter suppressing element
A method of manufacturing a welding electrode comprising:
Said thread-like element comprising a channel extending in a direction parallel to said longitudinal axis (XX)
- at least one conductive filament (3) is arranged inside the channel (4)
- at least one said sputter suppressing element is arranged inside said channel (4)
The method comprises:
- forming a channel in a wire rod (12) made of a first base material;
Depositing a predetermined amount of at least one sputter inhibiting element;
Depositing at least one conductive filament (3) in said channel (4);
- warping the wire rod (12) so as to at least partly fix at least one said conductive filament (3) and at least one said sputter suppression element inside said channel (4)
Wherein the electrode is formed of a metal. 16. The method of claim 15, wherein the step of warping the wire rod (12) comprises a rolling step. 16. The method of claim 15, wherein depositing the predetermined amount of at least one sputter suppression element comprises: spraying a sputter suppressing material onto a longitudinal portion of the wire rod (2) comprising the channel (4) Wherein the method comprises the steps of: A method according to claim 15, wherein depositing the at least one conductive filament (3) comprises depositing a substantially continuous conductive filament (3), preferably made of aluminum Gt; 16. The method of claim 15,
In order to at least partly fix at least one said conductive filament (3) and at least one said sputter inhibiting element in a channel (4) so that said conductive filament (3) is arranged along a spiral path, , A step of applying a twist to the wire rod (12)
Further comprising the steps of:

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