DE102021131714A1 - Gas supply device for a welding device - Google Patents

Abstract

Gas supply device (1) for a welding device, comprising a housing body (2) which comprises a flow channel structure (3) through which a gas, in particular a welding gas, can flow and which has at least one inflow opening (4) for gas to be supplied to a welding point to flow into the flow channel structure ( 3) and has at least one outflow opening (5) for outflow of gas to be supplied to the welding point from the flow channel structure (3), wherein the housing body (2) has a first housing body part (2.1) and at least one that can be connected or is connected to the first housing body part (2.1). further housing body part (2.2) is formed, which jointly delimit the flow channel structure (3) at least in sections.

Description

The invention relates to a gas supply device for a welding device, comprising a housing body, which comprises a flow channel structure through which a gas, in particular a protective or welding gas, can flow, which has at least one inflow opening for the inflow of gas to be supplied to a welding point into the flow channel structure and at least one outflow opening for Outflow of the weld gas to be supplied from the flow channel structure.

Corresponding gas supply devices for welding devices, sometimes also referred to as mouthpieces, are basically known in various embodiments from the prior art.

In particular, an embodiment of a corresponding gas supply device produced in an additive manufacturing process (“3D-printed”) is known.

This known embodiment is in need of improvement insofar as the flow channel structure formed in the housing body is difficult to clean. Specifically, there is the problem that the flow channel structure formed in the housing body becomes clogged with process-related deposits, and therefore becomes dirty. Corresponding contamination can result in an impairment of the gas supply, which can possibly have a negative effect on the welding process or the welding result.

Another improvement in the known embodiment is that due to the given flow paths of different lengths, difficulties can arise with regard to a desirable gas inflow that is as homogeneous as possible to a welding point.

Proceeding from this, the invention is based on the object of specifying a gas supply device for a welding device that is improved in comparison thereto.

The object is achieved by a gas supply device for a welding device according to claim 1. The dependent claims relate to possible embodiments.

A first aspect of the invention relates to a gas supply device for a welding device. The gas supply device is thus generally for supplying a gas, such as. B. a protective or welding gas, set up to a welding area generated by a welding device.

The gas supply device includes a housing body that can also be referred to as a mouthpiece. The housing body comprises a flow channel structure through which a gas, in particular a protective or welding gas, can flow. The flow channel structure has at least one inflow opening for gas to be supplied to a welding point to flow into the flow channel structure and at least one outflow opening for gas to be supplied to the welding point to flow out of the flow channel structure. Consequently, a gas can be introduced into the flow channel structure or into the housing body via the at least one inflow opening and can be discharged from the flow channel structure or from the housing body via the at least one outflow opening. As will be seen below, the flow channel structure is typically enclosed by walls of the housing body or walls of the housing body parts forming the housing body; the flow channel structure can therefore be referred to as an inner flow channel structure.

The housing body of the gas supply device is formed by a first and at least one further housing body part that can be connected or is connected to the first housing body part. The housing body parts forming the housing body or the respective walls of the housing body parts forming the housing body delimit or define the flow channel structure at least in sections, in particular completely, together. The flow channel structure can therefore first cross-section-forming sections - these can z. B. be configured ring-like or annular groove-like - have, which are limited or defined by the first housing body part, and second or further cross-section-forming sections - these can also z. B. be configured ring-like or ring-groove-like, which are delimited or defined by the second or further housing body part.

The full cross-section of the flow channel structure is therefore delimited or defined by the respective cross-section-forming walls of the housing body parts.

The gas supply device is improved compared to the prior art described at the beginning, in particular because the housing body, as described in more detail below, is designed in several parts. Overall, there is therefore an improved gas supply device for a welding device.

As follows, the connection of the housing body parts forming the housing body is typically detachable. The housing body parts can thus z. B. in at least one, z. B. horizontally, aligned joining plane to form the housing body and the flow channel structure detachably connected or be; the housing body can thus be dismantled into its individual parts by releasing the connection of the housing body parts, as a result of which the flow channel structure can be accessed and thus cleaned.

In one embodiment, the housing body parts can each have a (substantially) rotationally symmetrical basic shape, at least in sections, optionally completely. This can e.g. B. entail manufacturing advantages.

In a further embodiment, the at least one inflow opening for gas to be supplied to a welding point to flow into the flow channel structure can be formed in the first housing body part, and the at least one outflow opening for gas to be supplied to the welding point to flow out of the flow channel structure can be formed in the second housing body part. This can ensure that a gas flowing through the housing body between a corresponding inflow opening and a corresponding outflow opening flows through the flow channel structure at least in sections, possibly completely, as the flow channel structure, as mentioned, is delimited or defined by the housing body parts.

As mentioned, the flow channel structure can have ring-like or ring-groove-like configured first sections, which are delimited or defined by the first housing body part, and ring-like or ring-groove-like configured second or further sections, which are delimited or defined by the second or further housing body part are. In one embodiment, the flow channel structure can therefore have a flow distribution section having a ring-like or ring-shaped basic shape, with a first ring (groove)-like or ring-shaped recess or depression being formed in the first housing body part and one in the second or further housing body part second or further annular (groove)-like or -shaped recess or depression is formed, wherein the flow distribution section is delimited or defined by the first and the second or further ring-like or -shaped recess or depressions.

In a further embodiment, at least one flow channel can be formed in the second housing body part, starting from the ring-like or ring-shaped recess and extending, in particular in the axial direction with respect to a central axis of the second or further housing body part, in the direction of the at least one outflow opening. In particular, a plurality of corresponding flow channels can be present in an arrangement distributed uniformly in the circumferential direction with respect to a central axis of the second or further housing body part.

In a further embodiment, the at least one flow channel can have a cross-sectional geometry that widens in the direction of the outflow opening. This makes it more difficult for the at least one flow channel and therefore the flow channel structure to become clogged with process-related impurities and thus for the flow channel structure to become soiled. Equally, the flow properties of the gas flowing out of the at least one outflow opening can be influenced in this way, if necessary.

In one embodiment, the at least one flow channel can be formed in a section of the second housing body part that has a conical basic shape. The at least one flow channel can be arranged or formed to run obliquely (substantially) following the conical basic shape; in this way, a measure to reduce or prevent clogging of the at least one flow channel and accordingly the flow channel structure with process-related impurities can also be implemented.

In a further embodiment, the flow channel structure, in particular due to its geometric-constructive dimensions, can be set up to form a dynamic pressure of the gas flowing through it. This can be achieved by appropriate cross-sectional configurations, i. H. in particular cross-sectional tapers, the flow channel structure can be realized. Corresponding cross-sectional tapering can also be formed in particular in a flow channel of the flow channel structure.

With regard to the connection of the housing body parts, it is conceivable in a further embodiment that a connection section, possibly flange-like or flange-shaped, is formed on or in the first housing body part, in particular in the form of a ring-like or ring-shaped engagement section, and on or in the second housing body part, a mating connection section corresponding thereto, in particular in the form of a ring-like or ring-shaped receiving section, is formed, the connection section and the Counter-connection section are set up to cooperate with each other to form a sealing connection in the intended connected state of the housing body parts. A stable and tight connection of the housing body parts can be realized in this way. Of course, one or more sealing elements can be arranged or formed between the housing body parts, which ensure sealing of the housing body.

With regard to the connection of the housing body parts, it is conceivable in a further embodiment for the housing body parts to be releasably connectable or connected to one another, in particular by a screw element passing through them. For this purpose, the housing body parts can each be provided with at least one bore, which can be pushed through by a corresponding section of a screw element and is aligned when the housing body parts are in the connected state as intended. The housing body parts can thus be connected to one another by a screw connection, so that a sufficiently stable, yet easily detachable connection of the housing body parts is created.

In a further embodiment, the housing body parts can be metal, plastic or ceramic parts, which z. B. are produced by primary forming or forming manufacturing processes. The choice of material for manufacturing the housing body parts is therefore fundamentally free and can be specified with regard to a desired configuration of the housing body parts.

Of course, individual, several or all of the embodiments of the device described above can be combined with one another.

A second aspect of the invention relates to a welding device for welding metal, in particular light metal, which has a gas supply device according to the first aspect of the invention. The welding device can be configured in particular for welding motor vehicle components. All statements in connection with the gas supply device apply analogously to the welding device.

• 1, 2 jeweils eine Prinzipdarstellung eines Ausführungsbeispiels einer Gaszuführeinrichtung in einer Explosionsdarstellung (1) und in einer quergeschnittenen Darstellung (2); sowie
• 3, 4 jeweils eine Prinzipdarstellung eines Ausführungsbeispiels eines ersten Gehäusekörperteils (3) und eines zweiten Gehäusekörperteils (4) jeweils in einer perspektivischen Darstellung.

The invention is explained again using exemplary embodiments in the drawings. They showed:

• 1 , 2 each a schematic representation of an embodiment of a gas supply device in an exploded view ( 1 ) and in a cross-section representation ( 2 ); as well as
• 3 , 4 each a schematic representation of an embodiment of a first housing body part ( 3 ) and a second housing body part ( 4 ) each in a perspective view.

The gas supply device 1 shown in the figures is generally used for supplying a gas such as e.g. B. a protective or welding gas, set up to a welding area generated by a welding device.

The figure shows that the gas supply device 1 comprises a housing body 2, which can also be referred to as a mouthpiece, which comprises a flow channel structure 3 through which a gas, in particular a protective or welding gas, can flow. The flow channel structure 3 has at least one inflow opening 4 for gas to be supplied to a welding point to flow into the flow channel structure 3 and at least one outflow opening 5 for gas to be supplied to the welding point to flow out of the flow channel structure 3 . A gas can therefore be introduced via the at least one inflow opening 4 into the flow channel structure 3 or into the housing body 2 and can be discharged from the flow channel structure 3 or the housing body 2 via the at least one outflow opening 5 . In particular based on the sectional view according to 2 it can be seen that the flow channel structure 3 is surrounded by walls of the housing body 2 formed by a first housing body part 2.1 and a second housing body part 2.2 which can be connected or connected to the first housing body part 2.1, or walls of the housing body parts 2.1, 2.2 forming the housing body 2; the flow channel structure 3 can therefore be referred to as an inner flow channel structure.

Consequently, the housing body parts 2.1, 2.2 forming the housing body 2, or the respective walls of these, jointly delimit or define the flow channel structure 3 when the housing body 2 is installed as intended. The flow channel structure 3 can therefore - as shown in the figure by way of example - have ring-like or ring-groove-like configurations of the first cross-section-forming sections 3.1, which are delimited or defined by the first housing body part 2.1, and ring-like or ring-groove-like configurations of the second cross-section-forming sections 3.2, which are formed by the second or further housing body part are limited or defined, have. The full cross-section of the flow channel structure 3 is thus delimited or defined by the respective cross-section-forming walls of the housing body parts 2.1, 2.2.

The connection of the housing body parts 2.1, 2.2, which are shown in the figures as an example with an essentially rotationally symmetrical basic shape, is typically detachable, as will be explained in more detail below. How 2 shows by way of example, the housing body parts 2.1, 2.2 can therefore z. B. in at least one, z. B. horizontally aligned joining plane to form the housing body 2 and the flow channel structure 3 detachably connected or be; the housing body 2 can thus be dismantled into its individual parts by detaching the connection of the housing body parts 2.1, 2.2, as a result of which the flow channel structure 3 can be accessed and thus cleaned.

In the exemplary embodiments, the at least one inflow opening 4 is formed in the first housing body part 2.1 and the at least one outflow opening 5 is formed in the second housing body part 2.2. This can ensure that a gas flowing through the housing body 2 between the at least one inflow opening 4 and the at least one outflow opening 5 flows through the flow channel structure 3 . Specifically, in the exemplary embodiments, a plurality of outflow openings 5 distributed in the circumferential direction are formed in a lower region of the second housing body part 2.2. The same can apply to the inflow openings 4 .

It can also be seen from the figure that the flow channel structure 3 can have a flow distribution section 3.3 having a ring-like or ring-shaped basic shape, wherein in the first housing body part 2.1 a first ring (groove)-like or ring-shaped recess or depression 2.1.1 is formed and in the second or further housing body part 2.2 a second annular (groove)-like or -shaped recess or depression 2.2.1 is formed, wherein the flow distribution section 3.3 is formed by the first and the second ring-like or -shaped recess or Wells 2.1.1, 2.2.1 is limited or defined.

The flow channel structure 3, ie in particular the flow distribution section 3.3, can be set up, in particular due to its geometric-constructive dimensions, to form a dynamic pressure of the gas flowing through it. This can be realized by appropriate cross-sectional configurations, ie in particular cross-sectional tapering, of the flow channel structure 3 or of the flow distribution section 3.3. How 2 shows, corresponding cross-sectional tapers can also be formed in particular in a flow channel 3.4 of the flow channel structure 3; specifically shows 2 for example, a design of corresponding cross-sectional tapers in a region of an end of the flow channels 3.4 facing the flow distribution section 3.3.

It can also be seen from the figure that in the second housing body part 2.2 several flow channels 3.4 emanating from the flow distribution section 3.3 and extending in the axial direction with respect to the central axis of the second housing body part 2.2 in the direction of the respective outflow openings 5 can be formed. The flow channels 3.4 are present in the figures, for example, in a circumferentially uniformly distributed arrangement with respect to the central axis of the second or further housing body part 2.1, 2.2.

Based on the sectional view according to 2 it can be seen that the respective flow channels 3.4 have a cross-sectional geometry that widens in the direction of the respective outflow opening 5. This makes it more difficult for the flow channels 3.4 and therefore the flow channel structure 3 to become clogged with process-related impurities and thus for the flow channel structure 3 to become dirty. Likewise, the flow properties of the gas flowing out of the outflow openings 5 can be influenced in this way, if necessary.

The flow channels 3.4 are embodied in the figures by way of example in a section of the second housing body part 2.2 which has a conical basic shape and are arranged or configured to run obliquely (substantially) following the conical basic shape; in this way, a measure to reduce or prevent clogging of the flow channels 3.4 and accordingly the flow channel structure 3 with process-related impurities can also be implemented.

With regard to the connection of the housing body parts 2.1, 2.2, the figures show by way of example that an optionally flange-like or flange-shaped connecting section 2.1.2, in particular in the form of a ring-like or ring-shaped engagement section, is formed on or in the first housing body part 2.1 and on or in the second housing body part 2.2 a corresponding mating connection section 2.2.2, in particular in the form of a ring-like or ring-shaped receiving section, with the two fastening sections 2.1.2, 2.2.2 being set up when the housing body parts 2.1 are connected as intended, 2.2 to interact with each other to form a sealing connection. A stable and tight connection of the housing body parts 2.1, 2.2 can be realized in this way. Of course, one or more sealing elements (not shown) can be arranged between the housing body parts 2.1, 2.2 or be formed, which ensure sealing of the housing body 2.

With regard to the connection of the housing body parts 2.1, 2.2, the figures also show that the housing body parts 2.1, 2.2 can be detachably connected to one another or are connected to one another by a screw element that passes through them axially. For this purpose, the housing body parts 2.1, 2.2 can each be provided with at least one bore 2.1.3, 2.2.3 which can be pushed through by a corresponding section of a screw element and which is aligned when the housing body parts 2.1, 2.2 are connected as intended.

Finally, it should be noted that the housing body parts 2.1, 2.2 be metal, plastic or ceramic parts in all embodiments, which z. B. are produced by primary forming or forming manufacturing processes. The choice of material for manufacturing the housing body parts 2.1, 2.2 is therefore fundamentally free and can be specified with regard to a desired configuration of the housing body parts 2.1, 2.2.

The advantages, details and features described in the individual exemplary embodiments can be completely interchanged with one another, combined with one another and transferred to one another.

Reference List

1

gas supply device

2

case body

2.1

housing body part

2.2

housing body part

2.1.1

Recess or deepening

2.1.2

connection section

2.1.3

drilling

2.2.1

Recess or deepening

2.2.2

counter connection section

2.2.3

drilling

3

flow channel structure

3.1

cross-section forming section

3.2

cross-section forming section

3.3

flow distributor section

3.4

flow channel

4

inflow opening

5

outflow opening

Claims (10)

Gas supply device (1) for a welding device, comprising a housing body (2) which comprises a flow channel structure (3) through which a gas, in particular a welding gas, can flow and which has at least one inflow opening (4) for gas to be supplied to a welding point to flow into the flow channel structure ( 3) and at least one outflow opening (5) for outflow of gas to be supplied to the welding point from the flow channel structure (3), characterized in that the housing body (2) is formed by a first housing body part (2.1) and at least one connected to the first housing body part (2.1) connectable or connected further housing body part (2.2) is formed, which jointly delimit the flow channel structure (3) at least in sections. Gas supply device claim 1 , characterized in that the at least one inflow opening (4) for inflow of gas to be supplied to a welding point is formed into the flow channel structure (3) in the first housing body part (2.1), and the at least one outflow opening (5) for outflow of gas to be supplied to the welding point is formed from the flow channel structure (3) in the second housing body part (2.2). Gas supply device claim 1 or 2 , characterized in that the flow channel structure (3) has a flow distribution section (3.3) having a ring-like or ring-shaped basic shape, wherein a first ring-like or ring-shaped recess (2.1.1) is formed in the first housing body part (3.1) and in a second ring-like or -shaped recess (2.2.1) is formed in the second housing body part (2.2), the flow distribution section (3) being delimited by the first and the second ring-like or -shaped recess (2.1.1, 2.2.1). is. Gas supply device claim 3 , characterized in that in the second housing body part (2.2) at least one starting from the ring-like or ring-shaped recess and extending, in particular in the axial direction with respect to a central axis of the second housing body part (2.2), in the direction of the at least one outflow opening (5). Flow channel (3.4) is formed. Gas supply device claim 4 , characterized in that the at least one flow channel (3.4) has a cross-sectional geometry that widens in the direction of the at least one outflow opening (5). Gas supply device claim 4 or 5 , characterized in that the at least one flow channel (3.4) is formed in a conical basic shape having section of the second housing body part (2.2). Gas supply device according to one of the preceding claims, characterized in that the flow channel structure (3), in particular due to its geometric-constructive dimensions, is set up to form a dynamic pressure of the gas flowing through it. Gas supply device according to one of the preceding claims, characterized in that an optionally flange-like or flange-shaped connecting section (2.1.3), in particular in the form of a ring-like or ring-shaped engagement section, is formed on or in the first housing body part (2.1) and on or in the second housing body part (2.2) there is a corresponding counter-connection section (2.2.3), in particular in the form of a ring-like or ring-shaped receiving section, the connection section (2.1.3) and the counter-connection section (2.2.3) being set up are, in the intended connected state of the housing body parts (2.1, 2.2) to interact with each other to form a sealing connection. Gas supply device according to one of the preceding claims, characterized in that the housing body parts (2.1, 2.2) can be or are detachably connected to one another, in particular by a screw element passing through them. Welding device for welding metal, in particular light metal, comprising a gas supply device (1) according to one of the preceding claims.

Images