JPS6327899Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a conduit cable for a hot wire type arc welding torch.

Conventional welding torches for so-called hot wire type non-consumable electrode type arc welding machines, which conduct welding by passing current through the wire and using the ^I2R heat generated to heat the wire and feed it to the arc section, are shown in Figures 1 to 1. 3
I got what is shown in the figure.

In FIG. 1, 1 is a TIG torch, and its main body is equipped with a wire heating torch 2. 3
is the torch cable of the TIG torch 1, which is composed of a gas hose 6, a water hose 7, a power cable 8, and a control cable 9. 4 is a conduit cable, which is connected to a wire feeding device (not shown), and the welding wire is supplied with power by the wire heating torch 2;
It is used to feed the welding part.

FIG. 2 shows the side of the conduit cable 4 on which the wire feeding device is attached. Reference numeral 80 denotes a connecting fitting that is inserted into and fixed to the feeding connector 70 of the wire feeding device.A hole is made in the fitting to receive the welding wire guide liner 60, and the fitting is further screwed into the protective spring tube 10 of the liner 4. . Spring tube 1
0 is a spring made of tightly wound steel wire. 1
1 is an insulating tube, and the liner 60 is worn out,
This is to prevent electric shock when the welding wire comes into contact with the spring tube 10. Reference numeral 90 is a reinforcing rubber which prevents the conduit cable 4 from being sharply bent at the connection portion when the conduit cable 4 is connected to the wire feeding device.

FIG. 3 shows a state in which the conduit cable 4 is attached to the wire heating torch 2. A power supply chip 16 that supplies heating current to the welding wire is connected to the connection fitting 14.
and wire heating torch 2 with knob screw 15.
Fixed to. Note that 5 is a power cable for supplying wire heating current to the wire heating torch 2. Terminals 12 and 18 are crimped at both ends of the power cable 5, and it is fixed to the feed connector 70 and the wire heating torch 2 with bolts 13 and 17.

Next, the operation will be explained. Since the power supply chip 16 and the liner 60 are consumable parts that wear out as the welding wire passes through them, their replacement will be explained. To replace the power supply chip 16, first loosen the knob screw 15, remove the bolt 17 fixing the power cable 5, and then remove it from the wire heating torch 2. Thereafter, the power supply chip 16 is removed from the connection fitting 14 and replaced. On the other hand, for the liner 60, the connecting fitting 80 portion of the conduit cable 4 is removed from the feed connector 70, and the power cable 5 is also removed in the same manner. Thereafter, the liner 60 inside the conduit cable 4 is pulled out and replaced.

The conduit cable of conventional hot wire arc welding torches is constructed as described above, so when replacing consumable parts such as the power supply tip and liner, the wire heating power cable must also be removed, and at the same time the power supply chip must be removed. The liner is secured with a knob screw, which tends to loosen, and the liner is only reinforced with a spring tube, which causes the conduit cable to vibrate slightly due to the feeding resistance when feeding the wire, resulting in poor feeding. There were some drawbacks, such as:

This idea was made to eliminate the above-mentioned drawbacks of the conventional cable.The power cable and conduit cable are integrated with an insulated tube, and both ends of the power cable are integrated with the conduit cable. It is an object of the present invention to provide a conduit cable for a hot wire type arc welding torch that can be easily attached and detached, increase the rigidity of the conduit cable, and reduce slight vibrations during wire feeding.

An embodiment of this invention will be described below with reference to the drawings. In FIG. 4, the TIG torch 1, wire heating torch 2, gas hose 6, water hose 7, power cable 8, and control cable 9 are the same as the conventional device. FIG. 5 shows an example of how the conduit cable 4 in FIG. 4 is attached to the wire feeding device. In the figure, reference numeral 20 denotes a power supply fitting, which is inserted into and fixed to the feed connector 70 of the wire feeding device, and is screwed onto the adapter 19 via the terminal of the power cable 5 and a washer 21 having spring properties. There is. A through hole for a welding wire guide liner 60 is provided inside the power supply fitting 20 and the adapter 19, and a spring tube 10 for protecting the liner 60 is screwed into the adapter 19. Spring tube 1
0 is a spring made of closely wound steel wire, and is insulated by an insulating tube 11. 90 is reinforced rubber,
This prevents the conduit cable 4 from being bent sharply at the connection point when the conduit cable 4 is connected to the wire feeding device. 23 is a heat-shrinkable insulating tube that integrates the conduit cable 4 and the power cable 5.

Next, the conduit cable 4 in FIG.
The attachment portion of the wire heating torch 2 will be explained with reference to FIGS. 6 to 8. Reference numeral 16 denotes a power supply chip that supplies heating current to the welding wire, and is screwed into the power supply ring 28 via an insulating cap nut 26 and an insulating sleeve 25 that fasten the conduit cable 4 to the wire heating torch 2. Inside the power supply ring 28 is a mounting bracket 2 that is screwed into the spring tube 10.
9 is arranged and fixed to the power supply ring 28 with a set screw 27. The conductor 24 of the power cable 5 is divided and inserted into a plurality of small diameter holes 30 provided in the power supply ring 28, and connected and integrated by brazing or the like. 25
is an insulating sleeve, and since the outer diameter of the power supply ring 28 is the largest among the conduit cables 4, it is used to prevent the insulating tube 23 from being damaged when placed on the floor or the like.

Next, the operation, especially the replacement of consumable parts, will be explained. When replacing the power supply chip 16, the cap nut 26 screwed into the wire heating torch 2 is rotated and the conduit cable 4 is removed. Thereafter, the power supply chip 16 is removed from the power supply ring 28 and replaced.

On the other hand, the liner 60 is replaced by removing the conduit cable 4 from the feeding connector 70 of the wire feeding device, and then pulling out the liner 60.

As described above, according to this invention, the conduit cable for guiding the welding wire and the power cable for wire heating are integrated with a heat-shrinkable insulated tube, and both ends of the power cable are integrated with the conduit cable. This not only makes it easier to replace consumable parts of the conduit cable, but also increases the rigidity of the conduit cable, which has the effect of suppressing slight vibrations during wire feeding and ensuring stable wire feeding.

Furthermore, since the outer periphery of the power supply ring is covered with a heat-shrinkable insulating tube and an insulating sleeve is disposed thereon, a highly safe conduit cable for a hot wire type arc welding torch can be obtained.

[Brief explanation of drawings]

Figure 1 is an outline drawing of a hot wire type arc welding torch with a conventional conduit cable attached, Figure 2
The figure is a detailed cross-sectional view of the wire feeding side conduit cable in Figure 1, Figure 3 is a detailed cross-sectional view of the wire heating torch side conduit cable in Figure 1, and Figure 4 is a conduit cable according to an embodiment of this invention. Figure 5 is a detailed cross-sectional view of the wire feeding side conduit cable in Figure 4, Figure 6 is a detailed cross-sectional view of the wire heating torch side conduit cable in Figure 4, Figure 7 is the 6th
FIG. 8 is a sectional view taken along line AA in the figure, and FIG. 8 is a sectional view taken along line BB in FIG. 19...Adapter, 20...Power supply fitting, 23
... Insulation tube, 24 ... Conductor, 25 ... Insulation sleeve, 26 ... Cap nut, 28 ... Power supply ring, 29 ... Mounting metal. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A wire guide liner, a protective spring tube provided on the outer periphery of this liner, an adapter provided at one end of this tube, a power supply fitting screwed onto this adapter, a power supply ring provided at the other end of the tube, A power cable for wire heating is provided along the tube, and a heat-shrinkable insulating tube is placed over the outer periphery of the power cable and the tube to integrate them, and the conductor is connected at one end of the power cable. A conduit cable for a hot wire arc welding torch that is sandwiched between an adapter and a power supply fitting, and at the other end of the power cable, the conductor is distributed and fixed to multiple holes provided in a power supply ring.