KR102349536B1 - Jig for Welding - Google Patents

Abstract

The present invention relates to a temporary welding jig used in the temporary welding operation. According to the present invention, the temporary welding jig comprises: a body coupled to surround a pair of pipes facing in the axial direction and having at least one or more through holes penetrating through an outer surface and an insertion groove formed on the outside along the periphery of the through holes; and a connector in which a hollow is formed to communicate with the through hole and a tip is inserted into the insertion groove of the body to seal the periphery of the through hole. The welding can be performed by inserting an electrode rod of a torch head into the hollow of the connector.

Description

Temporary welding jig {Jig for Welding}

The present invention relates to a temporary welding jig, and more particularly, to a temporary welding jig capable of preventing scattering of sparks during a temporary welding operation.

There are various types of welding depending on the method, and among them, butt welding refers to a method of butt welding the ends of welded products such as wire rods, plates, and pipes to each other.

In general, in the case of butt welding that connects two pipes, temporary welding is performed first by spot welding in several places of the butt, and then welding is performed along the perimeter of the butt.

However, the flame generated during the temporary welding operation has a very high temperature, which can threaten the safety of the worker as the flame is scattered in all directions, and is a cause of safety accidents such as fire at the work site by contact with flammable materials.

The present invention has been devised to solve the above problems, and it is possible to protect the safety of workers and prevent fire by preventing the scattering of sparks and blocking light exposure without installing a separate retaining facility during temporary work. It is to provide a grounding g.

Another object of the present invention is to provide a temporary folding jig that can be easily combined and separated from a pipe or the like, thereby reducing the time required for work.

Another object of the present invention is to provide a temporary welding jig capable of temporarily welding several places around the pipe without moving separately after coupling to the pipe or rejoining the pipe after separation.

Another object of the present invention is to provide a temporary folding jig capable of aligning two pipes to be butt welded side by side.

Another object of the present invention is to provide a temporary welding jig capable of accurately performing temporary welding on a desired site.

The above-described object of the present invention is coupled to surround a pair of pipes facing in the axial direction, having at least one or more through-holes penetrating through the outer surface, and inserting grooves formed on the outside along the circumference of the through-holes. body; and a connector having a hollow formed so as to communicate with the through hole, and the tip of which is inserted into the insertion groove of the body and coupled to seal the periphery of the through hole, wherein the electrode rod of the torch head is inserted into the hollow of the connector to perform temporary welding. It can be achieved by providing a temporary welding jig that can perform.

According to one aspect of the present invention, a boss portion dividing the through hole and the insertion groove may be formed to protrude between the through hole and the insertion groove of the body along the circumference of the through hole.

According to another feature of the present invention, it further comprises a pair of reference grooves formed on the inner circumferential surface of the through hole to be spaced apart from each other in the radial direction of the through hole, and the abutting portion of the pair of reference grooves and the pipe is aligned on the same line. can be positioned.

According to another feature of the present invention, it may further include a center line extending along the inner circumferential surface of the body across the through hole in the radial direction.

According to another feature of the present invention, the connector includes a body in which the hollow is formed, a head portion having an extended width formed at the rear end of the body, and a plurality of electrode rod length adjustment grooves formed along the periphery of the rear end of the head portion. may further include.

According to another feature of the present invention, the plurality of electrode length adjusting grooves may have different depths.

According to another feature of the present invention, the electrode rod length adjustment groove may include a nozzle insertion groove formed at the rear end of the head part, and an electrode rod insertion groove formed in a bottom surface of the nozzle insertion groove.

According to another feature of the present invention, it may further include an alignment adjustment hole formed through one side of the through hole, and an adjustment bolt inserted into the alignment adjustment hole to adjust the alignment of the pair of pipes.

According to another feature of the present invention, the through-hole is made of a plurality, and may further include a cover coupled to the insertion groove to seal the remaining through-holes except for the through-hole to which the connector is coupled.

According to the temporary grounding jig according to the present invention, it is possible to protect the safety of workers and prevent fire by preventing the scattering of sparks and blocking light exposure without installing a separate maintenance facility during the temporary welding operation.

In addition, according to the provisional welding jig according to the present invention, it is possible to simply couple and separate the pipe, etc., and to temporarily join several places around the pipe without moving it separately after coupling to the pipe or rejoining the pipe after separation. the time required can be reduced.

In addition, according to the provisional welding jig according to the present invention, it is possible to easily and accurately perform a temporary welding operation by aligning a pair of pipes to be butt welded side by side.

In addition, according to the temporary folding jig according to the present invention, it is possible to continuously temporarily weld at least one or more parts at a time along the circumference of the ends buttted to each other in a state in which the temporary folding jig is mounted.

1 and 2 are perspective views of a body of a temporary welding jig according to an embodiment of the present invention.
3 and 4 is a state diagram showing a state of adjusting the alignment according to an embodiment of the present invention.
5 is an exploded perspective view of a body and a connector according to an embodiment of the present invention;
Figure 6 is a state diagram showing a state of adjusting the protrusion length of the electrode according to an embodiment of the present invention.
7 is a state diagram of a temporary grounding jig according to an embodiment of the present invention.
Fig. 8 is a cross-sectional view of Fig. 7;

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments described below are merely for explaining in detail enough that a person of ordinary skill in the art to which the present invention pertains can easily implement the invention, which limits the protection scope of the present invention. doesn't mean And, in describing various embodiments of the present invention, the same reference numerals will be used for components having the same technical characteristics.

In addition, in the embodiment below, a hollow pipe of a circular cross section is described as an example of a welding object (hereinafter, 'weld') to be butt welded, but this is only an embodiment of the present invention, and the body of the temporary welding jig is buttted to each other. If it can be closely coupled while surrounding the outer surface of a pair of weldments, it is clarified in advance that the provisional welding jig according to the present invention can be applied regardless of the external shape of the weldment.

In butt welding, the ends of a pair of pipes, which are weldments to be connected, are buttted to each other, and the buttted parts are joined along the circumference of the pipe by welding. A plurality of parts of the site are temporarily joined in advance.

Temporary welding jig according to the present invention, serves to support so that the step and gap between the pair of pipes are constantly maintained while such a temporary welding operation is performed. In addition, the user can easily perform the temporary welding operation on the buttted portion through the through hole without having to change the installation position or structure of the temporary welding jig according to the portion to be temporarily welded.

Hereinafter, a temporary welding jig according to an embodiment of the present invention will be described in detail with reference to the drawings.

Example

1 and 2 are perspective views of a body of a temporary welding jig according to an embodiment of the present invention.

As shown in Figures 1 and 2, the temporary folding jig 100 according to an embodiment of the present invention is a body formed in a ring shape to surround the outer surface of the pipe (10, see Figure 7) ( 200), at least one through-hole 300 penetrating through the outer surface of the body 200, an insertion groove 400 formed along the circumference of the through-hole 300, and insertion into the insertion groove 400 and a connector 900 that is

The body 200 is coupled such that a pair of pipes 10 surround a portion facing each other in the axial direction (length direction), and may be made of a metal material such as steel, aluminum, or brass.

As an example, the body 200 may include a pair of unit bodies having one end hinge-coupled to each other, wherein the other end of the pair of unit bodies may be separably coupled to each other by the coupling member 240 . have.

The user causes the outer surface of one side of the pair of pipes 10 to be wrapped by any one of the pair of unit bodies, and the other outer surface of the pair of pipes 10 is wrapped by the other unit body. . Thereafter, by allowing the other ends of the pair of unit bodies to be coupled to each other by the coupling member 240 , the body 200 may be coupled to surround the outer surface of the pair of pipes 10 .

At this time, the pair of unit bodies presses the outer surface of the pair of pipes 10 while enclosing the buttted portions of the pair of pipes 10 , and the pair of pipes on the inner surface of the pair of unit bodies The outer surface of (10) is closely supported. In other words, with respect to a pair of pipes 10 whose ends are abutted to each other, a pair of unit bodies wrap and support a pair of unit bodies facing each other, thereby generating a step difference due to flow between the pair of pipes 10. that can be prevented.

On the other hand, according to an embodiment of the present invention, the alignment of the pipes 10 can be adjusted even after the body 200 is coupled to the pair of pipes 10, which will be described later with reference to FIGS. 4 and 5 . do.

Hereinafter, for convenience of description, a unit body having a coupling member 240 provided at the other end is referred to as a first body 210 , and another unit in which one end is hingedly coupled to one end of the first body 210 by a hinge pin 270 . The body will be referred to as a second body 220 .

As shown in the drawing, when the weldment is a hollow pipe having a circular cross section, the body 200 is formed in a ring shape, and in this case, the first body 210 and the second body 220 as a pair of unit bodies. ) may be formed in a semicircular shape, respectively.

A first hinge shaft portion 211 is protruded from one end of the first body 210 , and a pair of second hinge shaft portions 221 are formed to protrude from one end of the second body 220 to be spaced apart from each other by a predetermined distance. The first hinge shaft part 211 is inserted between the pair of second hinge shaft parts 221 , and the first and second hinge pins 270 penetrate through the first and second hinge shaft parts 211 and 221 and are coupled to each other. The bodies 210 and 220 are rotatably coupled to each other.

However, this is only an embodiment in which one end of the first body 210 and the second body 220 are rotatably coupled to each other, the present invention is not limited thereto, and the first body 210 and the second body 220 are not limited thereto. Of course, all coupling structures that enable mutual rotation can be applied.

A first protrusion 212 protruding outward is formed at the other end of the first body 210 , and a second protrusion 222 protruding outwardly is formed at the other end of the second body 220 . When the first body 210 and the second body 220 are coupled by the coupling member 240, the first protrusion 212 and the second protrusion 222 face each other, and the first and second protrusions 212 and 222 ), first and second grooves 213 and 223 in the shape of a 'U' are cut and formed, respectively.

The rotating shaft 230 is coupled through the first recess 213 of the first protrusion 212 , and the end of the coupling member 240 is rotatably coupled to the rotating shaft 230 about the rotating shaft 230 . At this time, the coupling member 240 includes a rotation bar 250 , one end of which is rotatably coupled to a rotation shaft 230 coupled across the first recess 213 of the first protrusion 212 , and a rotation bar 250 . A pressing member 260 that is movable along and is supported by pressure on the outer surface of the second protrusion 222 (a surface opposite to the surface opposite to the first protrusion) may be included.

As an example, the rotation bar 250 includes a coupling portion 251 through which the rotation shaft 230 passes, an extension 252 extending from one side of the coupling portion 251 and having a screw thread formed on an outer circumferential surface thereof, and the extension It may include a gripping portion 253 screw-coupled to the portion 252 . In this case, the grip part 253 may be formed in a hexagonal nut shape, for example, as shown in the drawings. In addition, the extension part 252 passes through the pressing member 260 , and the pressing member 260 is coupled to the extension part 252 to be movable along the extension part 252 . Ring-shaped spacers 231 through which the rotation shaft 230 passes may be interposed on both sides of the coupling portion 251 to prevent the rotation bar 250 from flowing.

The pressing member 260 has a convex curved surface on one surface (hereinafter, referred to as 'pressing surface 261') facing the coupling portion 251 , and the outer surface 224 of the second protrusion 222 is the pressing member 260 . ) is formed as a concave curved surface to correspond to the pressing surface 261 of the.

When the first body 210 and the second body 220 are coupled by the coupling member 240, the rotation bar 250 is rotated in the direction of the second body 220 about the rotation shaft 230, and the extension part 252 is inserted into the second recess 223 of the second protrusion 222 , so that the pressing surface 261 of the pressing member 260 faces the outer surface 224 of the second projection 222 . Thereafter, when the holding part 253 is turned in one direction, the pressing member 260 together with the holding part 253 moves toward the coupling part 251 along the extension part 252, and the pressing member 260 is pressed. The surface 261 is closely supported on the outer surface 224 of the second protrusion 222 . That is, the second protrusion 222 is pressed and supported toward the first protrusion 212 by the coupling member 240 .

At least one through hole 300 is formed through the outer circumference of the body 200 . The through hole 300 may be formed in at least one of the pair of unit bodies, or in all of the pair of unit bodies, respectively. Standards such as width and length of the through hole 300 may be appropriately selected as needed.

Since the pair of unit bodies surround the buttted portions of the pair of pipes 10 , the buttted portions of the pair of pipes 10 are exposed to the outside through the through hole 300 , and the user Through the through-hole 300 , a temporary welding operation can be performed on portions of the pair of pipes 10 facing each other. For example, when four through-holes 300 are formed at intervals of 90° along the outer circumferential surface of the body 200, the user performs a temporary welding operation at intervals of 90° along the buttted portion of the pair of pipes 10, respectively. can do. That is, there is no need to dismantle the temporary welding jig 100 or change the installation position for the convenience of the temporary welding operation as in the prior art. In this case, it goes without saying that the number and spacing of the temporary joints can be adjusted by appropriately selecting the number and spacing between the through holes 300 as needed.

A pair of reference grooves 310 that are spaced apart from each other in the circumferential direction of the body 200 to face each other in the diameter direction of the through hole 300 are vertically formed on the inner circumferential surface of the through hole 300 . The reference groove 310 is for accurately coupling the body 200 to the pipe 10, and the body 200 so that the butt portion of the pair of pipes 10 and the reference groove 310 are located on the same line. By combining , it is possible to perform the temporary welding at the exact point of the pipe (10).

In addition, on the inner circumferential surface of the body 200 , a center line 280 crossing the through hole 300 from the reference groove 310 in the radial direction is formed to extend in the form of a groove, and the user can fit the center line 280 to fit the center line 280 . The ends of the pair of pipes 10 may be aligned.

On the other hand, the insertion groove 400 having a predetermined width along the periphery of the through hole 300 is formed on the outer side of the through hole 300 in the radial direction. At this time, between the through hole 300 and the insertion groove 400 , a boss part 350 dividing the through hole 300 and the insertion groove 400 is formed to protrude along the circumference of the through hole 300 . The inner surface of the boss part 350 forms the inner surface of the through hole 300 , and the outer surface of the boss part 350 forms the inner side wall of the insertion groove 400 .

The insertion groove 400 is for insertion of a connector 900 (refer to FIG. 3) to be described later, and after the user mounts the connector 900 to the torch head 20 (refer to FIG. 7), the distal end of the connector 900 can be inserted into the insertion groove 400 and a temporary welding operation can be performed on the pipe 10 through the through hole 300 . A detailed configuration of the connector 900 will be described in detail with reference to FIGS. 5 and 6 .

On the other hand, a cover 320 (refer to FIG. 7 ) is coupled to a through hole 300 into which the connector 900 is not inserted during a temporary welding operation among the plurality of through holes 300 to block flames, lights, and harmful gases. At this time, the front end protruding to the bottom of the cover 320 may be inserted and coupled to the insertion groove 400 , and the cover 320 covers and covers the through hole 300 .

An alignment adjustment hole 500 is formed through one side of the through hole 300 at a predetermined distance, and the alignment adjustment hole 500 has, for example, an adjustment of a hairless bolt, etc. so that the alignment of the pair of pipes 10 can be adjusted. Bolts 510 are screwed together. At this time, as shown in the drawing, a pair of alignment adjustment holes 500 mutually opposed to each other on both sides of the through hole 300 in the radial direction with respect to the center line 280 may be formed through.

3 and 4 are state diagrams illustrating a state of adjusting alignment according to an embodiment of the present invention.

As shown in FIG. 3 , in a state in which the body 200 is coupled to surround the pair of pipes 10 , when a step α occurs between the pipes 10 , the adjustment bolt 510 is used to Alignment can be adjusted.

For example, by pressing and pushing any one of the pair of pipes 10 protruding outward with the adjustment bolt 510, the pair of pipes 10 can be aligned side by side as shown in FIG. have.

5 is an exploded perspective view of a body and a connector according to an embodiment of the present invention.

According to an embodiment of the present invention, a plurality of fastening holes 600 are formed through the outer circumferential surface of the body 200 , and the grounding member 700 may be coupled to any one of the fastening holes 600 .

The grounding member 700 is to which a grounding electrode of a welding machine (not shown) is connected. For example, a user connects a (+) power to a welding rod (not shown) of the welding machine, and connects a (-) power to the grounding member 700 . Thus, it is possible to instantaneously flow a high-pressure current to the welded portion of the pipe 10, which is a weldment.

As an example, the grounding member 700 has a screw thread portion 710 having a screw thread formed on the outer circumferential surface so as to be screwed into the fastening hole 600 , and an end of the screw thread portion 710 extending in the form of a disk having a predetermined thickness. The extended portion 720 to be used, the connecting portion 730 extending from one surface of the extended portion 720 in the form of a plate of a predetermined thickness, and the flange portion 740 formed in the form of a disk having a predetermined thickness at the end of the connecting portion 730 . ) can be included.

A user may perform a welding operation by biting a clamp (not shown) such as tongs connected to the ground electrode of the welding machine to the connection part 730 . At this time, if necessary, select any one of the fastening holes 600 of the body 200 to couple the grounding member 700 and connect the grounding electrode to the grounding member 700, or a plurality of pre-coupled grounding members ( 700) can be selected to connect the ground electrode.

When changing the welding position, there are cases in which it is necessary to reconnect the ground electrode for the convenience of work, such as preventing the welding machine's power cable from being twisted. Therefore, it is possible to prevent in advance a problem in which a large number of defects are generated on the surface of the weldment due to the repeated reconnection of the ground electrode.

In addition, a wire connector (not shown) such as an eye bolt to which a safety wire (not shown) is bound may be coupled to the fastening hole 600 . In this case, by winding a safety wire around the pipe 10 and connecting it to the wire connector during temporary welding or welding, it is possible to prevent an accident of falling of the body 200 when working at height. In this case, it is of course also possible to form a separate coupling hole (not shown) in addition to the coupling hole 600 for coupling the wire connector.

The connector 900 is a metal material such as steel, and the rear end is coupled to the front end of the torch head 20 , and the front end of the connector 900 is inserted into the insertion groove 400 of the body 200 . Referring to FIG. 8 , the ceramic nozzle 21 is coupled to the front end of the torch head 20 , and the rear end of the connector 900 is coupled to the front end of the ceramic nozzle 21 . However, as another example of the present invention, of course, the rear end of the connector 900 may be directly coupled to the front end of the torch head 20 without the ceramic nozzle 21 .

The connector 900 includes a cylindrical connector body 910 in which the front end is inserted into the insertion groove 400 of the body 200 , and a head portion 920 extending in width at the rear end of the connector body 910 . and a hollow is formed in the connector body 910 and the head portion 920 to communicate with the through hole 300 of the body 200 .

The electrode rod 22 (refer to FIG. 8 ) of the torch head 20 is inserted into the through hole 300 through the hollow of the connector 900 , and the pair of pipes 10 exposed through the through hole 300 butt Temporary welding can be performed on the true part. At this time, the connector 900 serves to prevent scattering of sparks, light leakage, and leakage of harmful gases around the through hole 300 during the temporary welding operation through the through hole 300 . To this end, it is preferable that the front end of the connector body 910 is closely supported on the bottom surface of the insertion groove 400 during the temporary welding operation.

At the rear end of the head part 920, a support groove 921 (refer to FIG. 6) is formed concavely on one side of the hollow. When the connector 900 is coupled to the front end of the torch head 20, the support groove 921 is inserted into the front end of the handle 23 of the torch head 20 (refer to FIG. 8), and the connector 900 is connected to the torch head ( 20) to be closely supported. Meanwhile, a fixing bolt coupling hole 922 (refer to FIG. 6 ) for fixing the connector 900 to the torch head 20 may be formed on the upper side of the head part 920 .

6 is a use state diagram illustrating a state of adjusting the protrusion length of an electrode according to an embodiment of the present invention.

A plurality of electrode length adjustment grooves 923 are formed to be spaced apart from each other by a predetermined distance along the circumference of the rear end of the head portion 920 . The plurality of electrode length adjusting grooves 923 are formed to have different depths, and the user can adjust the protruding length of the electrode 22 of the torch head 20 by using the electrode length adjusting groove 923 .

More specifically, the electrode length adjustment groove 923 includes a nozzle insertion groove 924 formed on the rear edge of the head unit 920 and an electrode insertion groove 925 formed on the bottom surface of the nozzle insertion groove 924 . Including, each of the electrode length adjustment grooves 923 are formed to have different depths (a to d) of the electrode insertion grooves 925 (a<b<c<d).

The user inserts the tip nozzle (not shown) of the ceramic nozzle 21 or the torch head 20 into the nozzle insertion groove 924 so that the tip is supported on the bottom surface of the nozzle insertion groove 924, and the electrode rod insertion groove By contacting the tip of the electrode 22 with the bottom surface of the 925, it protrudes forward through the tip nozzle of the ceramic nozzle 21 or the torch head 20 using electrode insertion grooves 925 of different depths. The protrusion length of the electrode 22 can be variously adjusted.

7 is a state diagram of a temporary welding jig according to an embodiment of the present invention, and FIG. 8 is a cross-sectional view of FIG. 7 .

As shown in FIG. 7 , the first body 210 and the second body 220 are coupled with respect to the pair of pipes 10 whose ends are buttted to each other so as to surround the buttted portion.

At this time, the first and second bodies 210 and 220 are precisely aligned by aligning the center line 280 and the reference groove 310 of the first and second bodies 210 and 220 to the portion where the pair of pipes 10 are abutted to each other. It can be coupled, and the abutted portion of the pair of pipes 10 is exposed to the outside through the through hole 300 .

Thereafter, the coupling member 240 coupled to the first protrusion 212 is rotated in the direction of the second protrusion 222 so that the pressing surface 261 of the pressing member 260 is formed on the outer surface 224 of the second protrusion 222 . ) and rotate the grip part 253 in one direction to face it. At this time, the gripper 253 moves along the extension 252 to push the pressing member 260 toward the outer surface 224 of the second protrusion 222 , and the pressing surface 261 of the pressing member 260 . ) is closely supported on the outer surface 224 of the second protrusion 222 to press and support the second protrusion 222 toward the first protrusion 212 . That is, the other ends of the first body 210 and the second body 220 are firmly coupled to each other by the coupling member 240 .

After the first and second bodies 210 and 220 are coupled to the portion where the pair of pipes 10 are facing each other, if necessary, the alignment of the pair of pipes 10 may be adjusted. For example, when the alignment is misaligned and a step α is generated between the pipes 10, the alignment may be achieved by tightening the adjusting bolt 510 of the pipe 10 protruding outward.

Thereafter, the user inserts the distal end of the connector 900 into the insertion groove 400 formed along the circumference of the through hole 300 , and temporarily joins the pair of pipes 10 to the abutted portion through the through hole 300 . will do the job.

At this time, the periphery of the through-hole 300 is blocked by the connector 900 inserted into the insertion groove 400 and the periphery of the through-hole 300 is sealed, and leakage of flame, light, or harmful gas is prevented during the temporary welding operation. do. To this end, the tip of the connector 900 may be in close contact with the bottom surface of the insertion groove 400 . As another example, the inner peripheral surface of the connector 900 may be in close contact with the outer surface of the boss part 350 , or the outer peripheral surface of the connector 900 may be in close contact with the outer side wall of the insertion groove 400 .

The user may sequentially perform the gluing operation at a plurality of places along the circumference of the pipe 10 through the plurality of through-holes 300, and at this time, the through-hole 300 into which the connector 900 is not inserted has a cover 320 ) to prevent leakage of sparks, lights, or harmful gases.

Although the embodiments of the present invention have been described above, it is understood that those of ordinary skill in the art to which the present invention pertains may make various modifications without departing from the scope of the claims of the present invention.

100: temporary jig 200: body
210: first body 220: second body
240: coupling member 250: rotating bar
260: pressing member 270: hinge pin
280: center line 300: through hole
310: reference groove 320: cover
350: boss 400: insertion groove
500: alignment adjustment hole 510: adjustment bolt
600: fastening hole 700: grounding member
900: connector 910: connector body
920: head portion 923: electrode rod length adjustment groove

Claims (9)

delete delete a body coupled to surround a pair of pipes facing in the axial direction, the body having at least one through-hole that is formed through the outer surface, and an insertion groove formed on the outside along the circumference of the through-hole; and
A hollow is formed so as to communicate with the through hole, and a tip end is inserted into the insertion groove of the body to include a connector coupled to seal the circumference of the through hole, and the electrode rod of the torch head is inserted into the hollow of the connector to perform the temporary welding can do,
It further comprises a pair of reference grooves formed on the inner circumferential surface of the through hole to be spaced apart from each other in the radial direction of the through hole, wherein the pair of reference grooves and the butt portion of the pipe can be positioned in the same line. temporary jig. delete a body coupled to surround a pair of pipes facing in the axial direction, the body having at least one through-hole that is formed through the outer surface, and an insertion groove formed on the outside along the circumference of the through-hole; and
A hollow is formed so as to communicate with the through hole, and a tip end is inserted into the insertion groove of the body to include a connector coupled to seal the circumference of the through hole, and the electrode rod of the torch head is inserted into the hollow of the connector to perform the temporary welding can do,
The connector includes a body in which the hollow is formed, a head part having an extended width at the rear end of the body, and a plurality of electrode rod length adjustment grooves formed along the periphery of the rear end of the head part. that. 6. The method of claim 5,
Temporary welding jig, characterized in that the plurality of electrode length adjustment grooves have different depths. 6. The method of claim 5,
The electrode rod length adjustment groove comprises a nozzle insertion groove formed at the rear end of the head part and an electrode rod insertion groove formed in a bottom surface of the nozzle insertion groove. delete delete

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