KR20190109875A - TIG welding torch with improved material supply structure - Google Patents

Abstract

The present invention relates to a TIG welding torch with an improved material supply structure and, more specifically, provides a welding torch and an installation jig, wherein a web target guide is stably installed, and further, an installation structure of the web target guide that is widely used can be provided.

Description

TIG welding torch with improved material supply structure

The present invention relates to a torch used in TIG welding, so that the supply of the material is made in a semi-automatic form in the welding process, so that even a relatively low skilled worker can perform TIG welding, not a complete expert, As the supply of the product is uniformly / uniformly, the work quality and efficiency are improved, and it can be widely applied to various kinds of welding machines so that the use range of the product can be secured very widely.

Welding of structures (welded materials) using metals or nonferrous metals as a base material is conventionally made of nonconsumable electrode type called GTAW (Gas Tungsten Arc welding) such as TIGsten (Tungsten Inert Gas welding). Gas shield arc welding is used.

In TIG welding, a torch for TIG welding is generally used to generate an arc between a nonconsumable electrode and the object to be welded, and the welding is performed while melting the object to form a molten pond (pool) according to the heat of the arc. do. During welding, the shielding gas is discharged from the torch nozzle surrounding the nonconsumable electrode, and welding is performed while blocking external air from the shielding gas.

Here, as shown to FIG. 14A and FIG. 14B, an example of the general purpose TIG welding torch 100 used conventionally is demonstrated.

14A is a side view which shows an example of the torch 100 for TIG welding, and FIG. 14B is a sectional view of the principal part of the torch 100 for TIG welding shown in FIG. 14A.

As shown in FIGS. 14A and 14B, the TIG welding torch 100 includes a nonconsumable electrode 101 and a nonconsumable electrode 101 which generate an arc between the object to be welded. Torch body 104 and nonconsumable electrode equipped with collet body 103 and collet body 103 holding collet 102 inward with protruding collet 102 and nonconsumable electrode 101 protruding from the tip side. ) Is disposed between the torch nozzle 105 and the torch body 104 and the torch nozzle 105 which are mounted on the collet body 103 while surrounding the 101 and discharge the screening gas toward the molten pond of the welded object caused by the arc. The torch cap 108 and the torch body 104, which are mounted with the rear gasket 107 disposed between the front gasket 106 and the torch body 104, are mounted at the same time. , A handle (steering wheel car) the user to grip and a 109 schematically.

In the above-described TIG welding torch 100, a welding cable C is connected, the shielding gas supplied through the welding cable C is discharged from the torch nozzle 105, and the welding cable C The TIG welding torch 100 can be used to perform welding while generating an arc between the objects to be welded to the nonconsumable electrode 101 by the power supplied through the nonconsumable electrode 101.

By the way, in TIG welding mentioned above, welding is performed using the torch 100 for TIG welding, supplying a filler material (melting rod) manually. In this case, the user must simultaneously operate the supply of filler metal and the operation of the torch 100 for TIG welding with the left and right hands.

On the other hand, it is also called welding wire web (filler) which is a filler material by providing the wire objective guide (it is also called a filler guide) in the TIG welding torch 100 mentioned above. It is also possible to perform TIG welding semi-automatically, while automatically feeding). In this case, while supplying a filler material becomes easy, the operability of this torch 100 for TIG welding may worsen by the wire objective guide attached to the torch 100 for TIG welding.

Specifically, the wire purpose guide is attached to the outer periphery of the torch nozzle 105 via an installation jig, and therefore is susceptible to heat. Moreover, the problem that the wire destination guide moves during operation, and the feeding position of the welding wire web is not determined becomes. In addition, since the installation jig has no general purpose, there is a problem that the manufacturer cannot share the installation jig between different TIG welding torches.

The present invention has been proposed in view of such a conventional situation, and the welding torch and the mounting jig which enable the installation of the web purpose guide in a stable state, and also enable the installation structure of the highly versatile wire purpose guide. The purpose is to provide.

In order to achieve the above object, the present invention provides the following means.

A non-consumable electrode for generating arcs between the object to be welded and a collet for supporting the non-consumable electrode with the non-consumable electrode inserted therein and the non-consumable electrode protruding from the tip side. A feeder configured to mount the collet body and the collet body to hold the collet inwardly and to supply power to the nonconsumable electrode through the collet body and the collet; The shield is installed on the collet body in a state surrounding the torch body and the nonconsumable electrode provided with a channel for supplying a screening gas, and the shield is directed toward the molten pond of the welded object formed by the arc. A torch nozzle for emitting a gas; A torch cap having a male screw portion that can be screwed onto a female thread portion provided on the side opposite to the side on which the collet body of the torch body is mounted, and attached to a detachable material with respect to the torch body; A mounting jig for installing a web purpose guide for feeding a welding wire (web) toward the molten pond of the welded object, the mounting jig having a male screw thread capable of being screwed into the female thread portion, with respect to the torch body. It is characterized in that it is mounted on the removable material.

And the mounting jig has a female screw portion into which the male screw portion of the torch cap can be screwed, and the torch cap is attached to a detachable material with respect to the mounting jig by screwing the female thread portion of the mounting jig into the male screw portion. It is done.

And the installation jig is characterized in that it has a through hole penetrating the nonconsumable electrode (nonconsumable electrode).

And in the state where the male screw portion of the installation jig is screwed to the female screw portion of the torch body, the tip of the male screw portion contacts the rear end of the collet, and the collet is pressurized toward the tip side.

The mounting jig has an extension collet for supporting the nonconsumable electrode inserted into the through hole on the slide in the axial direction, and the male thread of the mounting jig is screwed into the female thread of the torch body. In the state where the male screw portion of the torch cap is screwed into the female thread portion of the mounting jig, the tip of the extension collet abuts against the rear end of the collet, and the collet is pressurized toward the tip side.

And the wire (web) purpose guide is characterized in that it is mounted through the support on the outer peripheral portion of the installation jig.

The wire web guide is characterized in that the feeding position of the welding wire web is adjustable by changing the installation position of the support tool with respect to the installation jig.

And the installation jig has a stopper (retaining cap) for regulating the movement of the support tool.

And a collet supporting the nonconsumable electrode and the nonconsumable electrode in which the arc is generated between the object to be welded and the nonconsumable electrode inserted therein, and the nonconsumable electrode from the tip side. A power supply unit and a screening unit for mounting the collet body and the collet body to keep the collet in the protruded state and supplying power to the nonconsumable electrode through the collet body and the collet. A gas supply channel is installed in the collet body in a state surrounding the torch body and the nonconsumable electrode, and discharges the shield gas toward the molten pond of the welded object formed by the arc. A female thread installed on the side opposite to the side on which the torch nozzle and the collet body of the torch body are mounted. A web objective guide for feeding a welding wire web toward a molten pond of the welded object with respect to a welding torch having a male thread that can be screwed in and having a torch cap attached to a detachable material with respect to the torch body. It is an installation jig for installing, and has a male screw portion that can be screwed on the female thread portion, characterized in that mounted to the detachable material with respect to the torch body.

The torch cap is attached to a detachable material with respect to the installation jig by screwing the female screw portion into the male screw portion of the torch cap.

And a through hole penetrating the nonconsumable electrode.

And in the state where the male screw portion is screwed on the female screw portion of the torch body, the tip portion of the male screw portion contacts the rear end portion of the collet while pressing the collet toward the tip side.

And an extension collet for supporting the nonconsumable electrode inserted into the through-hole on the slide in the axial direction, wherein the male screw portion is screwed to the female screw portion of the torch body, It is characterized in that the collet is pressurized toward the front end side while the front end portion of the extension collet is in contact with the rear end of the collet in the screwed-in state.

And the mounting jig according to the above (11). (14) The wire (web) guide is characterized in that it can be installed on the outer peripheral portion through the support.

And the mounting jig according to one of the above (9) to (13). (15) The installation jig according to the above (14), wherein the installation position of the support tool is changeable. (16) characterized in that it has a stopper (retaining cap) for regulating the movement of the support tool.

According to the present invention,

It is possible to provide a wire web guide in a stable state, and on the other hand, it is possible to provide a welding torch and a mounting jig which enable the installation structure of the universal high wire web guide.

1 is an exploded perspective view of the whole
Figure 2 is a side view of the entire coupling state
Figure 3 is a cross-sectional view showing the installation structure of the mounting jig
Figure 4 is a side view showing a wire (web) purpose guide
5 is a front view of a state in which a wire guide is installed on an installation jig through a support;
6 is a cross-sectional view showing an installation structure of the installation jig as a view according to another embodiment of the present invention.
7 is an exploded cross-sectional view showing the installation structure of the mounting jig of FIG.
8 is a view of a state in which the wire guide is moved back and forth sliding
Figure 9 is a side view of the stopper is provided outside the installation jig
10 is a view showing the position change of the feed head
Figure 11 is a side view of the rotation mechanism is applied to the wire guide
12 is a side view of a slide mechanism applied to a wire guide;
Fig. 13 is a sectional view showing a modification of the mounting jig.
14 is a cross-sectional view showing a modification of the torch cap.
15 and 16 show a conventional TIG welding torch.
Figure 17 is a sectional view showing the installation structure of the installation jig in another embodiment

EMBODIMENT OF THE INVENTION Hereinafter, the welding torch and installation jig which applied this invention are demonstrated in detail with reference to drawings. (1st Embodiment) First, as a 1st Embodiment of this invention, the welding torch 1A and installation jig 50A shown in FIG. 1, FIG. 2, and FIG. 3 are demonstrated. In addition, FIG. 1 is an exploded perspective view which shows the structure of the welding torch 1A. It is a side view which shows the structure of the welding torch 1A shown in FIG. FIG. 3: is sectional drawing which shows the mounting structure of 50 A of mounting jig | tools with which the torch 1A for welding shown in FIG. 1 is equipped.

The welding torch 1 A inserts a nonconsumable electrode 2 and a nonconsumable electrode 2 which generate an arc between the object to be welded, as shown in FIGS. 1, 2 and 3. The collet body 4 in which the collet 3 and the nonconsumable electrode 2 protruding from the distal end hold the at least a portion of the collet body 4 and the collet 3 in the at least a portion thereof. Shielding gas toward the molten pond of the welded object formed by the arc while covering the surroundings of the nonconsumable electrode 2 mounted on the torch body 5 and the collet body 4 to which the Is installed on torch body 5 with the front gasket 7 and mounting jig 50 A arranged between torch nozzle 6 and torch body 5 and torch nozzle 6 emitting Soon as the torch cap 8 and torch body 5 mounted at the same time, and is schematically provided with a handle (car steering wheel) 9, which user to hold.

That is, the welding torch 1A of the first embodiment uses a mounting jig 50A of the present embodiment, and the welding wire web is directed to the molten pond of the welded object described later in the general purpose TIG welding torch 100. It becomes the structure that installed wire (web) purpose guide 60 which supplies W.

The nonconsumable electrode 2 is composed of a long electrode rod formed of a metallic material having a high melting point such as tungsten.

Collet 3 consists of a rough cylindrical member formed of a metallic material having excellent electrical conduction and thermal conductivity, such as copper or a copper alloy, for example. The collet 3 has a through hole 3 a penetrating in the axial direction of the long axis, and the nonconsumable electrode 2 inserted inside the through hole 3 a is supported on the slide in the axial direction of the long axis. In addition, a plurality of slits 3b are arranged in a line at the side surface portion of the collet 3 at the tip side. These slits 3b are notched in a straight line from the tip of collet 3 to the intermediate portion in the axial direction. Thereby, elastic deformation is possible with respect to the direction in which the tip part 3c formed between each slit 3b is axially reduced. Moreover, the taper part 3d gradually reduced in diameter is provided in the front-end | tip part of the collet 3. As shown in FIG. On the other hand, the enlarged diameter part 3e diameter-expanded rather than the periphery is provided in the rear end of the collet 3. The enlarged diameter portion 3e is in contact with the mounting bracket 51A described later.

The collet body 4 consists of a roughly cylindrical member formed using a material having excellent electrical conduction and thermal conductivity, such as copper or copper alloy, for example. The collet body 4 has a through hole 4 a penetrating in the axial direction. The collet body 4 holds the collet 3 inserted from the rear end side of this through hole 4a inward. Moreover, the through hole 4a of the collet body 4 forms the flow path through which the shielding gas supplied from the torch body 5 side flows. In addition, the tip portion of the collet body 4 is gradually reduced in diameter, and only the nonconsumable electrode 2 protrudes from the tip portion of the through hole 4 a. In addition, a plurality of ejection holes 4b for ejecting the screening gas are arranged in the circumferential direction at the front end side of the collet body 4. And this collet body 4 is attached to the torch body 5 by the back side by screwing. In addition, the collet body 4 is attached to the detachable material with respect to the torch body 5.

The torch body 5 is a body metal fitting formed of a conductive material having a lower thermal conductivity than the above-described collet 3 or collet body 4, for example, steel or brass such as mild steel or stainless steel, or brass. 10, the outer circumference of the main metal fitting 10 has a structure coated with an insulating resin.

The main metal fitting 10 forms a feed part for supplying power to the nonconsumable electrode 2 through the collet body 4 and the collet 3. Specifically, the body metal fittings 10 are in contact with the collet body 4. Moreover, the collet 3 abuts the front end surface of the male thread part 51a of the mounting bracket 51A which the rear end surface of the enlarged diameter part 3e joins to the main body metal fittings 10. Thereby, the main body metal fitting 10 forms the feed part for passing the collet 3 through the collet body 4, and supplying electric power to the nonconsumable electrode 2. As shown in FIG. Moreover, the flow path for supplying a shielding gas toward the collet body 4 is formed in the inner side of the main body metal fitting 10.

The collet body 4 is attached to the one end side (tip side) of the part 10a (henceforth cylindrical part 10a) formed in the substantially cylindrical shape according to screwing. Moreover, the torch cap 8 is attached to the other end side of the cylindrical part 10a according to a screwing. The collet body 4 and the torch cap 8 are attached to the removable material from the cylindrical part 10a. Moreover, the main body metal fitting 10 has the connection part 10c at the front-end | tip of the part 10b (henceforth extension part 10b) extended in the outline tubular shape from the middle part of this cylindrical part 10a to the lower part. One end of a welding cable (cable C) can be connected to this connection part 10c by screwing. In addition, the other end of the welding cable (cable C) is connected to a welding power supply device (not shown), and the welding torch from the power supply device through the welding cable (cable C). Power and screening gas can be supplied at 1 A. In addition, the shielding gas may be, for example, an inert gas such as argon (Ar) or helium.

The torch nozzle 6 performs rectification of the screening gas ejected from the ejection hole 4b of the collet body 4, and prevents mixing of the sputter scattered during welding.

In addition, the torch nozzle 6 is formed in a substantially cylindrical shape by using a ceramic or the like having excellent heat resistance, and has a nozzle shape whose tip side is gradually reduced in diameter.

The torch nozzle 6 joins to the outer circumference of the collet body 4. Thereby, the torch nozzle 6 is attached to the detachable material from the collet body 4. As shown in FIG.

The mounting jig 50 A has a mounting bracket 51 A formed using, for example, steel or brass such as mild steel or stainless steel, and the outer peripheral portion of the mounting bracket 51 A is coated with an insulating resin. It has a structure.

The mounting bracket 51A has a male thread part 51a that can be screwed onto the female thread part 10d provided on the main body metal fitting 10 on one end side (front end side) thereof.

The mounting jig 50A is attached to the detachable material with respect to the torch body 5 by screwing together the female thread part 10d of the main body metal fitting 10 and the male thread part 51a of the mounting metal fitting 51A.

Moreover, the mounting bracket 51A has a female thread part 51b common to the female thread part 10d of the main body metal fittings 10 on the side (rear end side) opposite to the male thread part 51a side.

Furthermore, the through hole 51c which penetrates the nonconsumable electrode 2 in the axial direction is provided in the center of the mounting bracket 51A.

The mounting jig 50A joins the male threaded portion 51a of the mounting bracket 51A to the female threaded portion 10d of the main body metal fittings 10, while the tip of the male threaded portion 51a abuts the rear end (diameter 3e) of the collet 3 Press Collet 3 toward the tip side.

At this time, the front end surface (taper portion 3d) of the collet 3 inserted into the through hole 4a of the collet body 4 is forced to the front end surface of the through hole 4a. As a result, the tip portion 3 c of the collet 3 elastically deforms in the axial diameter direction.

As a result, the tip 3c of the collet 3 sandwiches the nonconsumable electrode 2 so that the nonconsumable electrode 2 can be fixed in the collet 3. On the other hand, by loosening the screwing of the mounting jig 50A, it is possible to adjust or detach and replace the position of the nonconsumable electrode 2 in the axial direction.

The wire objective guide 60 guides the welding wire W and feeds the welding wire W toward the distal end of the feeding head 61 and the feeding head 61 from which the welding wire W is discharged from the distal end side thereof. It has a compressor basket 62.

And the supply head 61 of this wire objective guide 60 is attached to the detachable material through the support 63 at the outer peripheral part of 50 j of installation jig | tools.

Moreover, the mounting bracket 51A has a female thread part 51b common to the female thread part 10d of the main body metal fittings 10 on the side (rear end side) opposite to the male thread part 51a side. Furthermore, the through hole 51c which penetrates the nonconsumable electrode 2 in the axial direction is provided in the center of the mounting bracket 51A.

The mounting jig 50A joins the male threaded portion 51a of the mounting bracket 51A to the female threaded portion 10d of the main body metal fittings 10, while the tip of the male threaded portion 51a abuts the rear end (diameter 3e) of the collet 3 Press Collet 3 toward the tip side.

At this time, the front end surface (taper portion 3d) of the collet 3 inserted into the through hole 4a of the collet body 4 is forced to the front end surface of the through hole 4a. As a result, the tip portion 3 c of the collet 3 elastically deforms in the axial diameter direction.

As a result, the tip 3c of the collet 3 sandwiches the nonconsumable electrode 2 so that the nonconsumable electrode 2 can be fixed in the collet 3. On the other hand, by loosening the screwing of the mounting jig 50A, it is possible to adjust or detach and replace the position of the nonconsumable electrode 2 in the axial direction.

The wire objective guide 60 guides the welding wire W and feeds the welding wire W toward the distal end of the feeding head 61 and the feeding head 61 from which the welding wire W is discharged from the distal end side thereof. It has a compressor basket 62.

And the supply head 61 of this wire objective guide 60 is attached to the detachable material through the support 63 at the outer peripheral part of 50 j of installation jig | tools.

The feeding head 61 has a straight portion 61a extending in the axial direction of the long axis and a curved portion 61b whose tip side is curved toward the tip side of the nonconsumable electrode 2. The liner (combustor basket) 62 is connected to a wire feeder (not shown). The wire feeder automatically feeds the welding wire W to the welding torch 1 A by the web feeder. I can send it.

As shown in FIG. 4A and FIG. 4B, the support fixture 63 has the ring part 64 which holds the outer peripheral part of the mounting jig 50A, and the arm part 65 extended toward the outer side from the outer peripheral part of this ring part 64. As shown to FIG.

In addition, FIG. 4A is a side view of the wire objective guide 60 mounted through the support 63 to the installation jig 50A. 4B is a front view of the wire objective guide 60 through the support 63 on the installation jig 50 A. FIG.

The ring portion 64 has a shape in which a part of the ring is open, and has a pair of flange portions 64 a and 64 b at both ends of the open portion. Thread portions (not shown) are formed in the pair of flange portions 64a and 64b.

The fastener 63 can be fixed to the outer circumference of the mounting jig 50A while elastically deforming the ring portion 64 in the axial diameter direction by fastening the fastening screw 66 to the screw portion. On the other hand, the support tool 63 can also be removed from the outer peripheral portion of the mounting jig 50A by releasing the fastened state by the fastening screw 66.

The arm portion 65 feeds the feed head 61 into the hole portion 65 a provided on the tip side thereof so that the straight portion 61 a of the feed head 61 is parallel to the nonconsumable electrode 2. It has 61 outer peripheries.

In addition, about the said support fixture 63, it is not necessarily limited to such a structure, If it is a structure which can be installed with respect to the outer peripheral part of 50 A of installation jig | tools, it can also be set as another structure.

The torch cap 8 seals the rear end side of the torch body 5, as shown in Figs. 1, 2 and 3, and has a male screw part 8a that can be screwed onto the female thread part 10d of the main body fitting 10.

Torch cap 8 is attached to putting on and taking off material with respect to installation jig 50A by screwing with female thread part 51b and male thread part 8a of installation metal fittings 51A. The torch cap 8 is formed in an end cap of a fuse so as to accommodate the rear end side of the nonconsumable electrode 2 inside.

The car steering wheel 9 is a part held by the user, is formed in the shape of a rough pipe, and is mounted on the extension portion 10b of the torch body 5. The welding cable C can then be connected to the connection 10 c of the torch body 5 through the inside of the car steering wheel 9.

When welding is performed using the welding torch 1A having the above structure, an arc is generated between the welded object and the nonconsumable electrode 2, and the welded melt is melted according to the heat of the arc. Grass).

During welding, the shielding gas is discharged from the torch nozzle 6 surrounding the nonconsumable electrode 2 to block the atmosphere (air) from the shielding gas.

In addition, during welding, the welding wire W is automatically fed to the molten pond of the welded object and welded while the welding wire W is melted in the arc.

In this case, in order to automatically supply the welding wire web W, the welding torch 1A can be operated by one hand, and it is possible to perform welding work stably and easily.

By the way, the welding torch 1 A of this embodiment removes the rear side gasket 107 with which the said general purpose TIG welding torch 100 is equipped, and between the torch body 5 and the torch cap 8, a wire (web) objective guide It becomes the structure that arranged installation jig 50A for installing 60.

That is, in this mounting jig 50A, the male screw part 51a of the mounting bracket 51A is common with the male screw part 8a of the torch cap 8.

Thereby, the female thread part 10d of the main body metal fitting 10 and the male thread part 51a of the mounting metal fitting 51A can be attached to the torch body 5 according to a screwing. In addition, the torch cap 8 can be attached to the mounting jig 50A by screwing the male screw part 8a to the female screw part 51b of the mounting bracket 51A.

In this case, since the mounting jig 50A is mounted on the rear end side of the torch body 5, the heat caused by the arc is more than that in the case of installing the web object guide through the mounting jig near the outer peripheral portion of the torch nozzle 105 as in the prior art. The impact can be avoided.

Moreover, since 50 A of installation jig | tools is attached to the torch body 5 according to a screw, it is possible to install the wire objective guide 60 in a more stable state than before. This can prevent the occurrence of a problem that the wire web guide guide 60 moves during operation and the feeding position of the welding wire web is not determined.

Moreover, the size of the female thread part 10d of the torch body 5 side is common among the torch for TIG welding different from a manufacturer. For this reason, 50 A of installation jig can be shared between manufacturers and other TIG welding torch.

As described above, in the welding torch 1A of the present embodiment, the wire jig 50A of the present embodiment can be installed in a stable state using the installation jig 50A described above. web) It is possible to realize the installation structure of the objective guide 60.

Next, as a 2nd embodiment of the present invention, the welding torch 1B and the mounting jig 50B shown in FIGS. 5 and 6 will be described. In addition, FIG. 5 is an assembly sectional view which shows the installation structure of the mounting jig 50B with which the torch 1B for welding is equipped. 6 is an exploded cross-sectional view showing a mounting structure of the mounting jig 50B included in the welding torch 1B.

5 and 6, the welding torch 1B basically has the same configuration as the welding torch 1A except that the mounting jig 50A is provided instead of the mounting jig 50A.

That is, this welding torch 1B uses the mounting jig 50B of this embodiment, and becomes the structure which provided the wire objective guide 60 to the said general purpose TIG welding torch 100. As shown in FIG. Therefore, in the following description, in the welding torch 1B, the site | part equivalent to the said welding torch 1A is abbreviate | omitted, and the same code | symbol is attached | subjected in drawing. In addition, illustration of the wire objective guide 60 is abbreviate | omitted in FIG. 5 and FIG.

The mounting jig 50B has a roughly cylindrical mounting bracket 51B formed using, for example, steel or brass such as mild steel or stainless steel, and the outer circumference of the mounting bracket 51B is formed of an insulating resin. Has a structure that is covered accordingly. The mounting bracket 51B has a male thread part 51a that can be screwed onto the female thread part 10d provided on the main body fitting 10 on one end side (front end side) thereof.

The mounting jig 50B is attached to the detachable material with respect to the torch body 5 by screwing together the female thread part 10d of the main body metal fittings 10, and the male thread part 51a of the mounting metal fittings 51B.

Moreover, the mounting bracket 51B has a female thread part 51b common to the female thread part 10d of the main body metal fittings 10 on the side (rear end side) opposite to the male thread part 51a side. Furthermore, the extension collet 52 is installed inside the mounting bracket 51B.

The extension collet 52 consists of a rough cylindrical member formed using a metallic substance having excellent electrical conduction and thermal conductivity, such as copper or a copper alloy, for example.

The extension collet 52 is held on the slide in the axial direction of the long axis in the inside of the mounting bracket 51B. Moreover, the extension collet 52 has the through-hole 52a which penetrates in the axial direction of an elongate axis | shaft, and supports the nonconsumable electrode 2 inserted in the inside of this through-hole 52a to a slide in an axial direction.

Moreover, the enlarged diameter part 52b diameter-expanded rather than the circumference | surroundings is provided in the rear end part of the extension collet 52. As shown in FIG. The enlarged diameter portion 52b may abut the tip surface of the male thread portion 8a of the torch cap 8.

The mounting jig 50B joins the male threaded part 51a of the mounting bracket 51B to the female threaded part 10d of the body metal fittings 10, and screwes the male threaded part 8a of the torch cap 8 to the female threaded part 51b of the mounting jig 51B. The tip of the extended collet 52 abuts against the rear end of the collet 3 and presses the collet 3 toward the front end side.

At this time, the tip end surface (taper portion 3d) of the collet 3 inserted into the through hole 4a of the collet body 4 is forced to the front end surface of the through hole 4a, whereby the tip end portion 3c of the collet 3 Elastic deformation in the direction of the shaft diameter.

As a result, the tip 3c of the collet 3 sandwiches the nonconsumable electrode 2 so that the nonconsumable electrode 2 can be fixed in the collet 3.

On the other hand, by loosening the screwing of the torch cap 8, it is possible to adjust or detach and replace the position of the nonconsumable electrode 2 in the axial direction.

In the second embodiment, since the installation jig 51B has the extension collet 52, the effect of the present invention can be obtained even when the collet 3 is short.

Therefore, in 2nd Embodiment, the cheap commercial collet 3 can also be used. That is, in 2nd Embodiment, as shown in FIG. 15, you may use the collet 70 which integrated the collet 3 into the extension collet 52. As shown in FIG.

That is, the collet 70 may be accommodated inside the mounting bracket 51B. Fig. 15 is an assembled sectional view showing the mounting structure of the mounting jig 50B of the welding torch 1C having the mounting jig 50B housed therein.

As shown in FIG. 15, the welding torch 1 C basically has the same configuration as the welding torch 1 B except having the collet 70. That is, this welding torch 1C uses the mounting jig 50B of the present embodiment, and has a structure in which a wire (web) objective guide 60 is provided in the general-purpose TIG welding torch 100.

Therefore, in the welding torch 1C, the site | part equivalent to the said welding torch 1B is abbreviate | omitted, and the same code | symbol is attached | subjected in drawing. In addition, illustration of the wire objective guide 60 is abbreviate | omitted in FIG.

Collet 70 is an extended collet 52 and has a structure in which collet 3 is integrated. The collet 70 has a through hole 70 a penetrating in the axial direction of the long axis, and the nonconsumable electrode 2 inserted inside the through hole 70 a is supported on the slide in the axial direction of the long axis.

Further, a tapered portion 70d gradually reduced in diameter is provided at the tip portion 70c of the collet 70. The rear end of the collet 70 is provided with an enlarged diameter portion 71 which is larger in diameter than its periphery. The enlarged diameter portion 71 can abut against the distal end surface of the male thread portion 8a of the torch cap 8.

When welding is performed using the welding torch 1 B or 1 C having the above structure, an arc is generated between the welded object and the nonconsumable electrode 2, and the welded object is melted according to the heat of the arc. Form a molten pond (pool).

During welding, the shielding gas is discharged from the torch nozzle 6 surrounding the nonconsumable electrode 2 to block the atmosphere (air) from the shielding gas.

In addition, during welding, the welding wire W is automatically fed to the molten pond of the welded object and welded while the welding wire W is melted in the arc. In this case, in order to automatically supply the welding wire web W, the welding torch 1A can be operated by one hand, and it is possible to perform welding work stably and easily.

By the way, the welding torch 1B or 1C of this embodiment removes the rear side gasket 107 with which the said general purpose TIG welding torch 100 is equipped, and, between the torch body 5 and the torch cap 8, a wire (web) ) It becomes structure that arranged installation jig 50B for installing purpose guide 60. That is, this mounting jig 50B is common to the male threaded part 51a of the mounting bracket 51B with the male threaded part 8a of the torch cap 8.

Thereby, the male thread part 10d of the main body metal fitting 10 and the male thread part 51a of the mounting metal fitting 51B can be attached to the torch body 5 along with a screwing. In addition, the torch cap 8 can be attached to the mounting jig 50B by screwing the male screw part 8a to the female thread part 51b of the mounting bracket 51B.

In this case, since the mounting jig 50B is mounted on the rear end side of the torch body 5, the heat caused by the arc is less than that in the case of installing the web object guide through the mounting jig near the outer periphery of the torch nozzle 105 as in the prior art. The impact can be avoided.

Moreover, since the installation jig 50B is attached to the torch body 5 according to a screw, it is possible to install the wire objective guide 60 in a more stable state than before. This can prevent the occurrence of a problem that the wire web guide guide 60 moves during operation and the feeding position of the welding wire web is not determined.

Moreover, the size of the female thread part 10d of the torch body 5 side is common among the torch for TIG welding different from a manufacturer. For this reason, the installation jig 50B can be shared among manufacturers using other TIG welding torches.

As described above, in the welding torch 1B or 1C of the present embodiment, the wire objective guide 60 can be installed in a stable state by using the installation jig 50B of the present embodiment described above. It is possible to realize the installation structure of the high wire objective guide 60.

In addition, this invention is not necessarily limited to the thing of the said 1st and 2nd embodiment, It is possible to add various changes in the range which does not deviate from the meaning of this invention. For example, in the said welding torch 1A, 1B, and 1C, the welding wire by the wire objective guide 60 is changed by changing the installation position of the support 63 with respect to the installation jig 50A, 50B. web) It is also possible to arbitrarily adjust the supply position of W.

Specifically, as shown in Figs. 7A and 7B, the wire objective guide 60 slides the supporter 63 supporting the feed head 61 in the front and rear directions with respect to the installation jig 50A and 50B. It is possible to arbitrarily adjust the distance from the tip of the welding wire W to the molten pond by (lantern slide) (that is, by sliding the slide parallel to the installation jig 50A, 50B). Do.

In addition, (A) of FIG. 7 is a side view which shows the state which carried out the support slide 63 on the back side with respect to installation jig 50A, 50B. Fig. 7B is a side view showing a state in which the supporter 63 slides on the front side with respect to the installation jig 50A, 50B.

In addition, it is good also as a structure which provided the stopper 53 shown in FIG. 8 in the outer peripheral part of 50 A of installation jig | tool.

The stopper 53 is provided to protrude toward the diameter-expansion direction of the front end of the mounting jig 50A.

In this configuration, when the support 63 slides forward, the support 63 contacts the stopper 53 so that the support 63 falls off from the tip side of the mounting jig 50A. It is possible to prevent that.

In addition, although the case of the mounting jig 50A is illustrated in FIG. 8, it can be set as the structure which attached the stopper 53 similarly to the case of mounting jig 50B.

In addition, as shown in (A), (B), (C) of the wire (web) guide 60, the position around the axis with respect to the mounting jig 50A, 50B of the support 63 is changed. It is possible to arbitrarily change the direction of the welding wire web W seen from the tip of the feed head 61.

In addition, (A) of FIG. 9 is a front view which shows the state where the supply head 61 is located in the upper part. (B) of FIG. 9 is a front view which shows the state which rotated the supply head 61 to one side from the state shown to (A). (C) of FIG. 9 is a front view which shows the state which made the supply head 61 turn to the other side from the state shown to (A).

Moreover, as shown in FIG. 10A, the wire objective guide 60 can also be set as the structure provided with the rotation mechanism 67 which supports the said feeding head 61 to a rotating material. In this configuration, it is possible to arbitrarily adjust the inclination angle of the feed head 61.

On the other hand, as shown in FIG. 10B, the wire objective guide 60 can also be set as the structure provided with the slide mechanism 68 which supports the said feeding head 61 to slide material in the front-back direction. This makes it possible to arbitrarily adjust the distance from the tip of the welding wire web W to the molten pond.

On the other hand, as shown in FIG. 10C, the wire guide guide 60 may be configured such that a damper mechanism 69 is disposed between the feed head 61 and the supporter 63. The damper mechanism 69 supports the feed head 61 so as to slide forward and backward in a state in which the feed head 61 is deflected forward along the coil spring 69 a.

Thereby, when the front-end | tip of the welding wire web W is forced to the said welded material during welding, it is possible to reduce generation | occurrence | production of the shake etc. in welding, while alleviating the impact.

Moreover, in said welding torch 1A, 1B, and 1C, the rear side gasket 107 with which the said general purpose TIG welding torch 100 is equipped is removed, and the installation jig 50A between the torch body 5 and the torch cap 8 is carried out. , 50B is arranged.

In one aspect of the present invention, the rear gasket 107 need not necessarily be removed. For example, as shown in FIG. 11, after fitting the shape of the front end side of the mounting jig 50A instead of the said rear gasket 107, the side gasket 12 is provided with the torch body 5 between the mounting jig 50A. It is also possible to arrange. In addition, although the case of 50 A of installation jig | tool is illustrated in FIG. 11, it can be set as the structure which arrange | positioned the rear side gasket 12 similarly to the case of mounting jig 50B.

By arranging the rear side gasket 12 between the torch body 5 and the mounting jig 50A (mounting jig 50B), the effect of preventing screening gas leakage can be obtained.

On the other hand, in the welding torch 1A, 1B and 1C, it is also possible to arrange | position mounting jig 50A, 50B, with the rear gasket 107 installed.

In this case, what is necessary is just to change the shape of the front end side of installation jig 50A, 50B according to the shape of the rear side gasket 107.

The shape of the front end side of the mounting jig 50A is, for example, by changing the shape of the insulating resin covering the outer circumference of the mounting bracket 51A, as shown in Figs. 12 (A) to (F), It is possible to change it arbitrarily. In addition, although the case of 50 A of installation jig | tool is illustrated in FIG. 12 (A)-(F), similarly to the case of mounting jig 50B, the shape of the insulating resin which coat | covers the outer peripheral part of mounting bracket 51B is similarly shown. By changing, the shape of the front end side of the mounting jig 51B can be arbitrarily changed.

The end cap of a fuse 8 is not limited to the one having a long cap shape for accommodating the rear end side of the nonconsumable electrode 2 described above, for example, as shown in FIG. 13. Like torch cap 8A, a short cap shape is also irrelevant.

In addition, although the torch 1A, 1B, and 1C for welding of this embodiment become a single nozzle structure which discharges the screening gas from the torch nozzle 6 mentioned above, it is not necessarily limited to this structure. For example, it is also possible to have a double nozzle structure in which an inert gas is discharged from an inner torch nozzle as a screening gas and an oxidized gas is emitted from an outer torch nozzle.

In addition, about the torch 1A, 1B, and 1C for welding of this embodiment, although the structure which employ | adopted the air cooling type is illustrated, it is also possible to employ | adopt water-cooling type. When water-cooling is adopted, it is possible to forcibly cool the torch for welding by circulating a coolant flowing in the welding torch by a cooling device connected to a welding power supply device.

Claims (1)

A collet body for supporting the non-consumable electrode before the arc is generated between the object to be welded and the non-consumable electrode inserted therein, and the collet body for holding the collet inward while protruding the non-consumable electrode from the distal end side; A feed unit configured to mount the collet body and supply power to the non-consumable electrode through the collet body and the collet; A torch nozzle mounted on the collet body in a state surrounding a torch body provided with a shield gas supply passage and the non-consumable electrode, and at the same time, discharging the shield gas toward a molten pond of the welded object generated by the arc; ; A torch cap having a male screw portion that can be screwed onto a female thread portion provided on the side opposite to the side on which the collet body of the torch body is mounted, and attached to a detachable material with respect to the torch body; It is provided with a mounting jig for installing a wire purpose guide for feeding the welding wire toward the molten pond of the welded object, the mounting jig has a male thread that can be screwed to the female thread portion, it is attached to the detachable material to the torch body TIG welding torch with improved material supply structure.

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