DE2528375A1 - CONNECTOR FOR CABLE FOR ARC PROTECTION GAS WELDING - Google Patents

Description

Connector for cables to arc shielding gas Welding

The invention relates to a connector for cables for arc protective gas welding with a contact for the welding current, furthermore with contacts for auxiliary currents and with one central channel for the passage of a welding electrode wire and the protective gas.

A cable lug is known, via which the contact for the welding current, the contact for an auxiliary or the operational circuit as well as the feeding of the electrode wire and the protective gas from the welding machine to the cable can. This cable lug consists of two concentrically arranged metal tubes that insulate against each other are. The main wire of the cable for the welding current is pressed onto the inner tube, while the outer tube with the auxiliary wire for the auxiliary circuit is connected. Two thirds of the

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Length of these tubes and part of the cable jacket are from covered with a vulcanized rubber cone. The free parts of the metal tubes form a two-pin plug, the can be inserted into a corresponding plastic box on the welding machine. The protective gas is from the Can fed through four openings, which are arranged radially on the metal inner tube, from where it is fed into one in the center of the Cable arranged tube made of polyethylene passes. So that the shielding gas from the channel through which the electrode wire passes cannot escape, a rubber sleeve is provided.

The main disadvantage of this cable lug is that the seal for the protective gas because of the friction of the electrode wire is quickly injured over the entire length of the sealing sleeve. A further disadvantage is that the elements of this Cable push cannot be used for a coupling between two cables for arc protective gas welding. In the end the known cable lug still has the disadvantage that contact is made with it for only one auxiliary circuit.

The object of the invention is to provide a connector for cables for Liebtbogen Sehutzgassebweißung, the provides a long-lasting seal for the shielding gas, makes contacts for more than one auxiliary circuit, and not just that Connecting the cable to a welding machine but also a connection of two cables with each other is permitted.

In a cable connector of the type described above this object according to the invention achieved in that a plug contact piece has a hemispherical head on its front, around which a centering pin and means Epoxy resin embedded contact pins arranged for the auxiliary currents are j that a socket contact piece on its front side has a conical opening, around which contact sockets for the auxiliary currents correspond to the contact pins embedded by epoxy resin Bind; that the welding current wire

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a cable to a rear, conical end of the socket cone ta.ktstücks is soldered and the auxiliary power supply of the cable are soldered to the contact sockets; that a metal threaded sleeve is provided around the front sides of the plug contact piece and the socket contact piece for pressing the ball-like head into the conical opening and to force the introduction of the contact pins into the contact sockets together.

The connector according to the invention can be designed so that with it the connection of a welding cable to a welding machine is possible. In a corresponding advantageous Embodiment of the invention, the rear end of the plug contact piece is cylindrical and has a thread for screwing the plug contact piece to the terminal board of a welding machine by means of a nut and for screwing on a busbar to the plug contact piece by means of a nut. Furthermore, in this embodiment sits in the rear End section of the central channel continuing through the plug-in contact piece has a sealing sleeve, the cylindrical Outer surface 'is provided with annular beads. How later Will be explained in detail, such a sealing sleeve offers long-lasting protection against undesirable Escape of the protective gas.

The connector according to the invention also has the advantage that it is designed as a coupling between two welding cables can be. In a corresponding embodiment, has the plug contact piece has a conical rear end to which the welding current wire of a cable is soldered, and the plug contact piece and the socket contact piece are axial by means of two metal threaded sleeves that engage in each other opposed to each other.

The invention is explained in more detail below using exemplary embodiments with reference to drawings:

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FIG. 1 shows a longitudinal section through a connector which is designed for connecting a welding cable to an apparatus for arc gas-shielded welding;

Figure 2 shows a cross section according to line A-A of the connector after. Pigur 1;

FIG. 3 shows a longitudinal section through the sealing sleeve;

FIG. 4 shows the sealing sleeve shown in FIG. 3 with its seat in the central channel of the plug contact piece of the connector according to Figure 1;

FIG. 5 shows a longitudinal section through a connector which is used as a coupling of two cables for arc gas-shielded welding designed '.

The connector shown in Figures 1 and 2 includes a Plug contact piece 1, which has a hemispherical head part on its front side. The plug contact piece 1 is immovably mounted on the terminal board 3 of a welding machine by means of a nut 2, and by means of another Nut 4 is clamped to the plug-in contact piece 1, the power-supplying rail 5. In the front part of the plug contact piece 1 there are five contact pins 6 around the hemispherical head embedded by means of epoxy resin 7. In addition, a centering pin 8 is attached at this point, which the contact pins 6 in front mechanical stress preserved. Conductors 9 for the auxiliary currents are soldered into the rear openings of the contact pins.

The socket contact piece 10 has a cylindrical shape, in the front of which there is a conical opening and the The back ends in a cone end. In the front part of the socket contact piece 10 are 5 contact sockets by means of epoxy resin 11 embedded to which the conductors 12 for the auxiliary circuits located in the welding cable 13 are soldered.

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The main wire 14 of the cable carrying the welding current is soldered to the conical end of the socket contact piece 10, while the rubber jacket 15 of the cable is sealed to the socket contact piece by means of a self-adhesive strip 10 is stuck on

The socket countersunk / jntaktstück 10 is connected by means of a shoulder a metal sleeve 17 bridged axially against the plug contact piece 1. For this purpose, the metal sleeve 17 has an internal thread; it is also provided with an outer casing 18 made of insulating material Mistake . The sleeve 17 can freely around the socket contact piece

10 and rotated around the cable 13. When screwing the sleeve 17 onto a corresponding thread of the plug contact piece 1, an annular line contact is made between the hemispherical head and the cone opening. Simultaneously there are contacts between pins 6 and the sockets

11 manufactured. The annular line contact can also Fulfill the task through 'you entire arrangement going central channel 23 through which the protective gas is passed and the Electrode wire is led to seal to the outside. The protective gas is supplied via a nozzle 19, during the Electrode wire is axially bound through a rubber sleeve 20 located in the channel 23 of the plug contact piece 1.

A tube is attached to a front plate 21 of the welding apparatus to protect the contact pins from mechanical influences to protect when the welding cable is not connected. The cable contains a metal helix or a tube Plastic 24 through which the electrode wire and the protective gas pass. Between the front of the Plug contact piece 1 and the socket contact piece 10, a sealing washer (at 25) made of rubber "can be inserted, to additionally seal the channel 23.

FIG. 3 shows the sealing sleeve 20 on an enlarged scale. Its outer surface has two annular beads 26. The inner opening of the sleeve 20 is larger than the diameter

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of the electrode wire. Each inserting the sleeve into the However, the cylindrical channel 25 of the plug contact piece 1 becomes the inner opening of the sleeve through the action of the annular beads deformed and narrowed (Figure 4).

When moving the electrode wire, only the constricted areas of the sealing sleeve 20 wear, and as a result of the constantly acting elastic deformation the seal for the protective gas is retained by the annular beads.

FIG. 5 shows an embodiment of the connector for connection two cables for arc gas welding. This connector contains the basic elements of the connector Figure 1. It differs from him in that the plug contact piece 31 has a conical end on which the the main wire 14 of the welding cable 13 carrying the welding current is soldered on. The axial pressure to make it more effective Contacts for the welding current and the auxiliary currents and for sealing the shielding gas duct is made by unscrewing the Metal sleeve 17 on the thread of the metal sleeve 28 is reached. The metal sleeves 17 and 28 can freely move around the corresponding Rotate contact pieces 31 and 10 while the shoulders located on them create the necessary axial pressure.

Over the metal sleeves 17 and 23 sleeves 29 and .30 are pressed, which step against each other when the clutch is fully closed.

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Claims (2)

Claims 1. Connector for cables for arc welding with a contact for the welding current, furthermore with contacts for auxiliary currents and with a central channel for Passing through a welding electrode wire and the protective gas, characterized in that that a plug contact piece (1, 31) has a hemispherical head on its front side, around which a Centering pin (8) and contact pins (6) embedded by means of epoxy resin (17) are arranged for the auxiliary currents; that a socket contact piece (10) has a conical opening on its front side, around which the contact pins Corresponding contact sockets (11) for the auxiliary currents are embedded by means of epoxy resin; that the Welding current core (14) of a cable (13) is soldered to a rear, conical end of the socket contact piece and the auxiliary power wires of the cable to the contact sockets are soldered; that a metal threaded sleeve (17) is provided around the front sides of the plug contact piece and the socket contact piece for pressing the hemispherical head into the conical opening and for inserting it to force the contact pins together into the contact sockets. 2. Connector according to claim 1, characterized in that the the rear end of the plug contact piece (1) is cylindrical and has a thread for screwing on the plug contact piece to the terminal board (3) of a welding machine by means of a nut (2) and for screwing on a Has busbar (5) to the plug contact piece by means of a nut (4), and that in the rear end portion of the through the plug-in contact piece continuing central channel (23) a sealing sleeve (20) sits, the cylindri ßche outer surface is provided with annular beads (26). - 2 - Connector according to claim 1, characterized in that the Steokkontaktstück (31) has a conical rear end on which the welding current vein (H) one Cable (13) is soldered, and that the plug contact piece (31) and the socket contact piece (10) by means of two metallic intermeshing threaded sleeves (17, 28) can be axially pressed against one another. "50986.5 / 0830