JPS60204Y2 - consumable electrode arc welding torch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a consumable electrode arc welding torch.

Conventionally, a shielding gas passage was provided on the outer periphery of a flexible cylindrical liner that guides the four-electrode electrode, and a welding current cable was arranged on the outer periphery of a single hollow cable attached to the welding torch body. It was connected.

However, since the diameter of the hollow cable is large, the flexibility of the hollow cable is poor, and the hollow cable itself is also heavy, making it difficult to operate the torch smoothly and making welding work extremely inefficient. there were.

Moreover, since the structure of the hollow cable is complicated, it is expensive and uneconomical.

Therefore, there has been a need for a consumable electrode arc welding torch that is economical and has good workability.

On the other hand, during arc welding work using consumable electrodes, shielding gas is generally used, and the consumable electrodes are sequentially fed to the welding position as the electrodes are consumed. Since the feeder is placed in the atmosphere, the atmosphere is brought to the welding position along with the consumable electrode that is fed to the welding position via the arc welding torch by the electrode feeder, resulting in a good welding result. can't get it.

In order to prevent this phenomenon, various consumable electrode arc welding torches have heretofore been proposed, but each of them has a complicated structure, making them expensive and uneconomical.

An object of the present invention is to provide a consumable electrode arc welding torch that is economical and has excellent workability, which eliminates the above-mentioned conventional drawbacks.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In each of FIGS. 1, 2, and 3, reference numeral 1 indicates a hollow long flexible wire guide in which a wire rod, for example, a wear-resistant wire rod with a substantially circular cross section is spirally wound; is a flexible, airtight covering member that covers the outer circumference of the wire guide 1 in the axial direction, and is, for example, a synthetic resin such as vinyl or Teflon, or a rubber tube with an inner diameter slightly smaller than the outer diameter of the wire guide 1. .

Note that this flexible covering member 2 does not cover the entire area in the axial direction of the wire guide 1, but covers only one part in a predetermined section.
Arranged physically or in sections.

Reference numeral 3 denotes a torch rear end metal fitting that is secured to one end of the wire guide 1, that is, the end in the X2 direction, and a female thread is provided at the end in the X2 direction.

This rear end fitting 3 is provided with a through hole in the axial direction and
A cylindrical portion 31 having an inner diameter larger than the outer diameter of the wire guide 1 is formed at the end in the direction.

Reference numeral 4 denotes a tip metal fitting which is screwed onto the torch rear end metal fitting 3, and which locks a wire locking member 5 which has approximately the same spiral shape as the wire guide and is screwed onto the end of the wire guide in the X2 direction. ing.

This tip fitting 4 is provided with a through hole 41 through which the consumable electrode passes.

Reference numeral 6 denotes an electrically insulating flexible tube having an inner diameter larger than the outer diameter of the wire guide 1 and the covering member 2, and is, for example, a tube made of vinyl, synthetic resin such as Teflon, or rubber.

One end of the flexible tube 6 is locked to the torch rear end fitting 3, and the other end is locked to the end of the torch body 7.

Reference numeral 8 denotes a gas supply means connected to the torch rear end metal fitting 3, and the shielding gas supplied through this gas supply means is transferred from the cylindrical part 31 of the torch rear end metal fitting 3 to the flexible covering member 2 and the flexible covering member 2. After passing through the space 9 formed by the tube 6, it passes through the torch body and is supplied to the tip of the torch body 7.

Note that the end of the wire guide 1 in the X-direction is locked to the tip of the torch body 7.

Conduit cable-1-1 is constituted by the above-mentioned 1 to 8.

A welding current cable 12 has one end connected to the torch body 1, and the other end connected to a welding current supply source (not shown).

13 is a flexible sheath member that encloses most of the long conduit cable 11 and welding current cable 12.

In the above torch, when shield gas is supplied to the gas supply means 8 from a supply source (not shown), almost all of the gas in the seal 1 flows from the concave portion 31 to the space 9, and most of the shield gas is The gas is supplied to the tip of the torch through a gas passage in the torch body 7.

However, as described above, the covering member 2 covering the wire guide 1 is disposed over the entire area in the longitudinal direction of the wire kite 1, and the wire rod is wound spirally with a force of 1. Because it is formed by rotating, when the shielding scum reaches the outer periphery of the wire kite 1 where the covering member 2 is not provided, the shielding scum flows into the wire guide 1 through the gap in the spiral part of the wire kite. do.

In this way, in the wire guide portion where the covering member 2 is not applied, the shielding gas that has flowed into the wire guide is
It flows in one direction and also tries to flow in the X2 direction.

During welding, a consumable electrode fed by an electrode feeding device (not shown) is fed into the torch main body through the through hole 41 of the torch rear end fitting 3, and a shielding gas is fed by the gas feeding means 8, and Welding is performed while supplying a welding current, but as mentioned above, a portion of the supplied shielding gas is about to flow in the X2 direction within the wire guide, so it flows through the through hole together with the consumable electrode supplied in the X1 direction. Atmospheric air entering the conduit through 41 is blocked.

Therefore, the atmosphere is not mixed into the welding position together with the consumable electrode during welding, and good welding results can be obtained.

FIGS. 2A and 2C show modified examples of the wire guide 1, and if the wire rod having a triangular cross section is formed in a spiral shape, the covering member can be reliably positioned with respect to the wire guide.

FIG. 3 is a diagram showing a modification of the flexible tube 6, in which a protrusion of an appropriate size is disposed in the inner circumference of the flexible tube in the circumferential direction and extending in the longitudinal direction. or are arranged at predetermined intervals in the longitudinal direction.

Providing the protrusion in this manner is advantageous because the passage of the shielding gas is always secured without being interrupted even when the welding torch body is handled freely.

FIG. 4 is a diagram showing the main parts of another embodiment of the present invention,
The end of the wire guide 1 in the X1 direction is screwed into the torch main body 7 which has a female spiral groove corresponding to the spiral shape of the wire guide 1, and the shielding gas is supplied as shown in FIG. The gas flows into the gas passage inside the torch body through a plurality of holes drilled in the circumferential direction at the end of the torch body 7.

Note that the end of the wire kite 1 in the X2 direction is locked to the torch rear end metal fitting 3 in the same way as the end in the X direction.

In the above description, the covering member 2 may be formed by molding synthetic resin on the outside of the wire guide.

In addition, the length of the covering member that covers the wire guide can be appropriately selected depending on the spirally formed state of the wire guide, that is, the gap between the spirally wound wires and the amount of shielding gas supplied. , and the coating position can also be selected at an appropriate position in the longitudinal direction of the wire kite.

Furthermore, set bolts can also be used as the means for locking both ends of the wire guide.

Further, if a flexible guide body made of a wire roughly wound in a spiral is provided inside the flexible tube 6, a passage for the shielding gas can be always secured.

Furthermore, although it is not necessary to provide a sheath member, if it is provided, the arc welding torch can be operated without the conduit cable and the welding current cable coming apart, making welding work easier.

As shown in Fig. 1, one end of the wire guide is locked to the tip of the torch body, and the other end is locked to the rear end metal fitting of the torch. The wire guide can be immediately taken out in the Easy to repair.

Although various embodiments of the present invention have been shown above, the present invention is not limited to these embodiments, and can be modified by appropriately combining each part of the above embodiments or replacing each part with an equivalent member. Various modifications can be made.

As described above, according to the present invention, the structure of the conduit cable that guides the consumable electrode and contributes to the supply of shielding gas can be simplified, so that the arc welding torch can be manufactured at low cost, and the conduit cable and welding Since the current cables are each constructed separately, each cable is more flexible than before, and the arc welding torch has good operability, that is, workability, and it has a simple structure. First, it is a consumable electrode arc welding torch that is economical and has good workability, as a part of the shielding gas blocks the atmosphere, so the atmosphere is not mixed into the welding position, and good welding results can be obtained. This is of great industrial benefit.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of the main part showing an embodiment of the present invention, Figure 2a
is an enlarged view of the main part configuration of FIG. 1, FIG. 3a is a cross-sectional view of FIG. 2a, FIGS. FIG. 4 is a longitudinal sectional view showing the main parts of another embodiment of the present invention, and FIG. 5 is a diagram showing a modification of FIG. 4.
FIG. 1...Wire guide, 2...Coating member, 3...Torch rear end fitting, 6...Flexible tube, 7...・Torch body, 11...
...Conduit cable, 12...Welding current cable.

Claims (1)

[Scope of utility model registration request] A consumable electrode arc welding torch includes: a hollow long flexible wire guide in which a wire is spirally wound; a flexible covering member having airtightness;
An electrically insulating flexible tube having a gap in the radial direction outside the covering member and disposed in the longitudinal direction of the covering member, and at least a space formed between the flexible tube and the covering member. A consumable electrode arc welding torch comprising a conduit cable comprising a gas supply means for supplying shielding gas and a welding current cable, each connected to a welding torch body.