DE7412095U - Welding torch for inert gas welding - Google Patents

Description

Martin Bronnhuber
Master Mechanic

Aislingen number 2ol

Welding torch for inert gas welding

The invention relates to a welding torch for inert gas welding processes with a central consuming electrode encased in shielding gas, which is tracked through the welding head, which is guided in a e.g. cylindrical welding head in a central nozzle until just before its mouth, whereby the nozzle is inserted into an internally insulated welding head, for example The nozzle assembly can be screwed in and the nozzle assembly has a rear internal thread at the end of an electrode feed tube can be robbed.

In a known welding torch of this type, this is Shielding gas through the electrode feed tube and the nozzle fed. In this case, protective gas goes through the inlet opening of the Electrode at the rear end of the electrode feed tube lost.

In another known type of welding torch for arc welding (TIG), the shielding gas supply pipe opens across the centrally equipped nozzle into a larger ring-shaped or sickle-shaped one surrounding the central nozzle Room. Slightly different pressure

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and flow velocities form all around this nozzle, which are compensated for by a larger gas supply in terms of quantity must become.

The object preceding the invention is therefore to provide a welding torch for inert gas welding processes with economical gas consumption and even distribution of pressure and flow velocities in the ring around the central To create nozzle.

The object of the invention is achieved in that the nozzle assembly at its front part in one with the surrounding Welding head housing is tapered to form an annular space and at its rear end has a further annular space, which is surrounded by channels (bores or slots ) connected to the front annular space and by an annular baffle, e.g. with an inner annular gap The flow edge is divided into a storage and distribution space, the gas supply (protective gas line) in the Storage space opens.

With the arrangement according to the invention, there was a considerable saving in protective gas, especially when using Corgan (Mixed gas) and C02 protective gas recorded.

These savings were particularly observed in the

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inventive subdivision of the rear annular space into a storage and distribution room.

The unjudgment 5k? .Nt e d «» r ring-shaped chicane can be seen in the center or lie on their periphery. It is expediently arranged so that dio the front annular space and the distributor space connecting channels covered by it and di? channels are arranged at the greatest possible distance from their flow edge.

The insert is expediently designed so that it has a circumferential groove with a snap ring or seal on the outer circumference having.

The welding head can be inserted on the rear side of the annulus a cooling jacket can be used in such a way that it also forms the rear closure of the entry space (storage space).

Another expedient embodiment of the subject matter of the invention consists in the fact that the protective gas line, the electrode supply? pipe and, if applicable, also the coolant lines are held in holes in the cooling jacket.

In the drawing, the subject matter of the invention is explained and described in more detail using an exemplary embodiment.

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It shows:

Fie. 1 the overall standard de? e'-according to the invention is the welding torch in the lower part of the Length s s c h η i 11;

Figure 2 is a perspective view of a detail of the welding torch according to F.g.l;

Fijr. 3 a per s uekt ivi see s-sectional view de: er find improper service ?.

In the drawing - Fig.2 - 1 is the handle, 2 is the electrode feed tube. 3 and k the cooling water ^ lines and

i the shielding gas line. \

6 is a switch for operating the electrode reel motor, who guides the electrode. Lines 2 to 5 are in one ■

Cladding tube 7 inserted on the handle 1 into the welding head 8 - Fig.l - introduced.

The cooling lines 3 and k open into the cooling spaces Io of the cooling jacket y \ the other lines are mounted xm cooling jacket.

On an external thread 11 at the lower end de? Electrode supply tubes 2 are screwed onto a nozzle assembly 12 provided with an internal thread 2k - FIG. 3. This is followed by the electric electrode nozzle 13, which can be screwed into the bore 23 with an internal thread from below.

The housing de? The welding head 8 points in the area of the nozzle a conical bulge 14; likewise the electrode nozzle at 13a.

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In a manner according to the invention, the nozzle assembly 12 is also at the front in one with the surrounding housing of the welding head 8 an annular space 15 forming way tapers.

This annular space is with another rear, on the nozzle assembly 12 formed annulus l6 connected. This is according to the invention divided by an annular baffle 18 into a storage space 19a and a distribution space 19b. The rear end of the annular space Ib forms the cooling jacket 9-

The protective gas supply pipe 5 opens - as can be seen - in the Storage space 19a a ..

The gas supplied through the protective gas line 5 first enters the storage space 19a and flows around the inside Flow edge around the chicane l8 in the distributor space 19b and passes from there through the bores 2o (channels 2o) into the front annular space 15. From here the gas flows in the form an annular beam - as arrows a and b show evenly distributed in the annular space between the electrode nozzle 13 and the front welding head housing part I ^ to the mouth,

In FIG. 3, a circumferential groove 25 for a sealing ring 2k can also be seen, with which the nozzle assembly 12 is fitted into the welding head 8 or its inner insulating layer 26.

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Claims (6)

Protection claims 1. Welding torch for inert gas welding processes with central Consuming electrode encased by protective gas, which is tracked by the welding head and which is located in a z-B. cylindrical welding head is guided in a central nozzle until just before its mouth, the nozzle in e.g. an internally insulated welding head can be screwed in and the nozzle holder with a rear internal thread can be screwed on at the end of an electrode feed tube, characterized in that that the nozzle assembly (12) at its front part in one with the surrounding welding head housing (l4) Annular space (15) forming way is tapered and κη his rear end has a further annular space (l6), which is provided by channels (2o) (bores or holes) distributed all around. Slots) connected to the front annular space (15) and through an annular baffle (18), e.g. with inner an annular gap leaving free flow edge in. a Storage space (19a) and distribution space (19b) is subdivided, the protective gas line (5) opening into the storage space (19a). 2. welding torch according to claim 1, characterized in that that the front annular space (15) and distributor space (19b) 741209519.1174 connecting channels (2o) through the annular shield · "- • e (lö) covered and the canals (2o) in the greatest possible-ii ~ located at a distance from their Umstromuiigskant e are. 3 welding torch according to claim 1 and 2, characterized in that that the insert part has on its outer periphery a peripheral rilit (25) with a sealing ring (26), the can also be designed as a seal. 4. Welding torch according to claim 1 or claim 1 and at least one of the following claims, characterized in that that a cooling jacket (9) is inserted into the welding head (8) on the side of the rear annular space (l6), at the same time the rear closure of the annular space (l6) (Storage space) forms. 5. Welding torch according to claim 1 or claim 1 and at least one of the following claims, characterized in that the protective gas line (5), the electrode Kuführungsrohr (2) and optionally also the cooling liquid lines (3 and k) in bores (23) of the cooling jacket {)) are held. 6. Welding torch for arc welding (TIG) mil center tracked by the welding head in a nozzle ■ a · ■ · _ Electrode, and above in the between the nozzle and the Weld head housing formed annulus and the like opening gas line, characterized in that the annular space is formed by an opening below the gas line opening arranged chicane with preferably inner flow around the river is divided into a storage and exit area. 741209519.1Z74