JPS6072683A - Flexible torch neck for electrical shield gas welding torch with continuously molten electrode - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the construction of a torch neck for an electric seven-head gas welding torch having a continuously melting electrode, and in particular to a flexible construction of an air- or gas-cooled l-chain neck.

Electrically shielded gas welding torches for welding with molten electrodes have a rigid torch neck, which may be curved or straight, between the torch grip portion and the gas nozzle. The torch neck is usually unscrewable and can be replaced with a differently bent torch neck if necessary for a given purpose. However, such an arrangement has the disadvantage that it is necessary to replace the torch neck with another one in order to adapt it to different requirements during welding. It is necessary to always have a torch neck bent into a certain shape.

Flexible torch necks for use in shielding gas welding torches with fixed, non-melting electrodes are already known.

An elastic, insulating cover layer is fixedly injection molded onto the electrically conductive inner part of the flexible/sol structure. Such an arrangement is possible because the inner cross-section of the torch neck only needs to allow the passage of gas, and a reduction or change of the cross-section when bent in other directions is allowed.

However, in a nord gas welding torch with a continuously melting electrode, not only is the gas passed through the conductive inner tube, but also a continuously melting electrode is passed through the wire. To ensure perfect electrode guidance, it is necessary that the conductive torch tube has a constant internal cross section and that the torch neck has a constant shape over its entire length. Therefore, in this type of torch, the torch neck was constructed to be rigid.

The object of the invention is to design the torch neck of a shielding gas welding torch with a continuously melting electrode in a flexible manner so that it can be bent in the desired manner and its contour can be changed. This allows access to welding locations that are difficult or impossible to reach with a rigid torch neck.

This task is solved according to the invention by an electrical seal with a continuously melting electrode.1 A flexible torch neck of the reservoir of a gas welding torch, with a connection for the gas nozzle and the hose unit arranged at the end. The torch neck is arranged concentrically around an inner spiral arranged coaxially with each other, in which the torch neck has a conductive inner tube and an insulating outer tube. It has an inner tube that is flexible with respect to the longitudinal axis thereof and an outer hose that is disposed outside the inner tube, and the ends of the inner tube and the outer hose are fixedly connected to a collapsible sleeve that is configured as a connecting part. This problem has been solved in that the collapsing sleeve itself is connected to the gas nozzle receptacle or to the intermediate piece.

Advantageous embodiments of the invention are indicated in the subclaims.

) - The flexi-pull nature of the f-neck means that the flexible conductive inner tube is not a solid tube, but forms the tube wall and is twisted in the direction of the longitudinal axis by % to 1 turn around its axis, which can be bent. This is given by the fact that it is constructed from a single wire made of metal. In order to stabilize and support the inner diameter of the torch neck, an inner spiral in the form of a flat wire spiral wound with a gap is placed inside the flexible inner tube. This ensures that the wire guiding spiral has an always constant internal cross section for passing the melting electrode and for passing the gas.

For connecting a gas nozzle to the torch neck, a gas nozzle receptacle is arranged at the end of the torch neck. The gas nozzle receptacle has a collapsible sleeve. This collapsible sleeve is used to permanently connect the insulating outer tube and the electrically conductive inner tube to the gas nozzle receptacle.

The part of the collapsible sleeve not covered by the outer hose is surrounded by an insulating bushing which abuts the collapsible sleeve and grips the hose end from above.

The gas nozzle receptacle, which is connected to the collapsing sleeve in the direction of the longitudinal axis, has a trapezoidal thread on its outer surface for receiving a coil spring. This coil spring securely holds the inserted gas nozzle. However, the fixing of the gas nozzle on the outside of the gas nozzle receptacle can also take place in other ways, for example with a threaded connection. In this case, the gas nozzle receptacle has an internal thread into which the injection nozzle or nozzle holder with an external thread can be screwed.

The other collapsible sleeve to which the intermediate piece of the sump connecting the hose unit in the direction of the longitudinal axis is connected has an external thread, the intermediate piece has a suitable internal thread, The intermediate piece is now connectable to the crushing sleeve.

The ends of the single wires of the electrically conductive inner tube are soldered or otherwise fixedly connected to the collapsible sleeve. The ends of the outer hoses are respectively fitted onto the outside of the collapsible sleeves and, for example, hose connectors 4 are fitted.
fixedly bonded using

A soft metal such as copper is used as the material for the single wire of the inner tube. The flat wire spiral located inside is made of a suitable elastic material. Metals with high thermal conductivity and sufficient mechanical strength, preferably brass, are also used for the gas nozzle receptacle, the intermediate piece and the crushing sleeve. Insulating materials are manufactured from suitable temperature-resistant and insulating materials, in particular plastics and reinforced plastics. The outer hose is also Flexi 7 Sol.

Silicone rubber or other synthetic elastomers are preferably used for this outer hose.

The construction according to the invention of the torch neck of the seal 1 gas welding torch reservoir has the advantage that the flexible torch neck can be adapted to different welding locations without changing the holding of the welding torch. This is advantageous for both manual and mechanical operation. The flexibility makes it possible to adapt to different welding locations without changing the joints. Therefore, a single welding torch can weld several difficult-to-access welding points as required without changing the torch. Of particular importance is that flexibility not only allows adaptation to a given weld location. This is also possible with a rigid configuration with bent tubes. The torch neck of the present invention changes the shape of the torch neck each time in the longitudinal direction of the torch neck, which is not possible with a rigid torch neck.
It can maintain its shape. A rigid torch neck can be bent once, but not many times and in different directions.

The invention will now be explained with reference to the drawings.

In FIG. 1, the flexible torch neck is designated by the reference numeral 1. The gas nozzle receiver 2 has a trapezoidal thread on the outside for receiving a coil spring 12 as a retaining spring for the gas nozzle receiver. A bar is used to restrict the crushing rib 7. The collapsible sleeve 7 is surrounded by the outer hose 4 on the outside, and the end of the inner tube 6 reaches inside the collapsible sleeve 7.
The single wire of this inner tube 6 is fixedly connected to the collapsing sleeve 7. An inner spiral 5 is disposed coaxially inside the inner (1111) pipe 6. The portion of the collapsible sleeve 7 that is not covered by the outer hose 4 is covered by an insulating bushing 3. The bushing 3 partially extends above the outer hose 4. An intermediate piece 9 is used as the connecting piece at the other end of the reservoir for connecting the hose unit. The ring flange 10 of the intermediate piece 9 prevents the forward sliding movement of the receptacle of the gripping shell of the hose unit.The outer hose 4- is connected at each end with a hose connector. 8 to the collapsing sleeve 7 or 7a, ensuring a gas-tight connection of the torch neck.

The structure of the present invention is shown in detail in FIG. 2, which is an enlarged view of a portion of FIG. The gas nozzle receiver 2 is connected to a collapsible sleeve 7 . An electrically conductive inner tube 6 is soldered or otherwise secured to this collapsible sleeve 7.

Inside, an inner su-guiral 5 is placed.

At the other end, the collapsible sleeve 7a has a connecting piece with an external thread in the dowel of the intermediate piece.

FIG. 2a shows the coaxial arrangement of the inner spiral 5, the single wire of the inner tube 6 and the collapsible sleeve 7a.

1.-The length of the tenen can be 10-50 degrees when the outer diameter is 14-30 degrees depending on the type of torch.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of the torch neck of the present invention, FIG. 2 is a partial longitudinal cross-sectional view of the torch neck excluding the outer hose, and FIG. 2a is a vertical cross-sectional view of the torch neck of the present invention. is the second
FIG. 3 is a cross-sectional view taken along line A-A in the figure. 1... Torch neck, 2... Gas nozzle receiving part, 3
...Insulating bushing, cow...outer hose, 5...inner spiral, 6...inner tube, 7...collapse sleeve,
8... Hose connector, 9... Intermediate piece, 10...
Ringfu Procedure Amendment (Method) Z/29/1980 To the Commissioner of the Patent Office 1, Incident) Indication 1982 Patent Application No. 173268 2 Title of Invention Electrical Shielding Gas Having Continuously Melting Electrodes Flexible Torch Neck for Welding Torches 3, Relation to the Amendr Case Patent Applicant %k Name Alexander Bintzel 4, Sub-Attorney 6, Subject of Amendment (1) Inventor of the Application and Patent Applicant Address column (2) Power of attorney 0°) 7 “:,,・2; 7. Contents of amendment (x-) (2) and (3) both in the attached circular.

Claims (1)

[Claims] (1) A flexisol torch neck for an electrically shielded gas welding torch with a continuously melting electrode, the connection between the gas nozzle and the hose unit, which is installed at the end 6. In the type having a conductive inner tube and an insulating outer tube, the torch has a flexible inner tube (6) with respect to the longitudinal axis and an inner tube (6) disposed outside of it. It has an outer hose (4),
The ends of the inner pipe (6) and the outer hose (4) are fixedly connected to the collapsible sleeve (7, 7a) which is configured as a connection part. F11-te (7
7a) itself is the gas nozzle receiving part (2) or the intermediate piece (
9) A flexible torch neck for an electric Sole 1 gas welding torch with a continuously melting electrode, characterized in that it is combined with and. 2 Patent 1, in which the part of the collapsible sleeve (7) not covered by the outer hose (4) is surrounded by an insulating bushing (3) placed over the hose end that contacts the collapsible sleeve A torch neck according to claim 1. 3. The gas nozzle receiving part (2) connected to one crushing sleeve (7) in the direction of the longitudinal axis has a coil spring (1) on the outer peripheral surface.
2) A torch neck according to claim 1 or (2), having a trapezoidal thread for receiving the collapsible sleeve (7a) extending in the direction of its longitudinal axis and having an external thread. Torch neck according to any one of claims 1 to 3, characterized in that the intermediate piece (9) has a corresponding internal thread. The torch neck according to any one of claims 1 to 4, wherein the inner spiral (5) is a flat wire spiral wound with a gap in between. 6. Flexible The inner tube (6) consists of single wires made of bendable metal, these single wires forming the tube wall, and in the direction of the longitudinal axis about the A torch neck according to any one of claims 1 to 5, wherein the neck is twisted one turn.