KR20170064243A - Flexible type trailing shield jig - Google Patents

Flexible type trailing shield jig Download PDF

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Publication number
KR20170064243A
KR20170064243A KR1020150169763A KR20150169763A KR20170064243A KR 20170064243 A KR20170064243 A KR 20170064243A KR 1020150169763 A KR1020150169763 A KR 1020150169763A KR 20150169763 A KR20150169763 A KR 20150169763A KR 20170064243 A KR20170064243 A KR 20170064243A
Authority
KR
South Korea
Prior art keywords
case
base material
jig
supply pipe
gas supply
Prior art date
Application number
KR1020150169763A
Other languages
Korean (ko)
Inventor
곽명섭
Original Assignee
대우조선해양 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 대우조선해양 주식회사 filed Critical 대우조선해양 주식회사
Priority to KR1020150169763A priority Critical patent/KR20170064243A/en
Publication of KR20170064243A publication Critical patent/KR20170064243A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/02—Carriages for supporting the welding or cutting element
    • B23K37/0276—Carriages for supporting the welding or cutting element for working on or in tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • B23K9/26—Accessories for electrodes, e.g. ignition tips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/24—Features related to electrodes
    • B23K9/28—Supporting devices for electrodes
    • B23K9/287—Supporting devices for electrode holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/32—Accessories

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Arc Welding In General (AREA)

Abstract

The present invention relates to a trailing shield jig (10) for welding a base material such as a flat plate or a pipe with a welding torch installed thereon. A shielding jig (10) (100) having a bottom surface (110) positioned adjacent to a surface corresponding to a surface of a welding base material. The case (100) has a bottom surface And a holder 300 formed on one side of the case 100 for detachably fixing the welding torch, wherein the gas supply pipe 200 for supplying the gas to the inside of the case 100, The case 100 is formed such that a plurality of adjoining nodal pieces 400 in one direction are coupled to each other in a bendable manner so as to correspond to various shapes and diameters of the base material surface. The.

Description

[0001] FLEXIBLE TYPE TRAILING SHIELD JIG [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trailing shield jig provided with a welding torch for welding a base material such as a flat plate or a pipe, To a trailing shield jig of a flexible type which can be used at the same time.

Generally, in oxidation-sensitive materials such as stainless steel, duplex stainless steel, super duplex stainless steel, and titanium, a shield is used to obtain a good weld, Is a very important factor.

When these materials are welded, they actively react with surrounding oxygen, carbon, hydrogen, nitrogen, etc. at a high temperature of 300 ° C or higher and are easily oxidized. Therefore, when welding, use a trailing shield jig to prevent this oxidation. It must be protected.

Particularly, in the case of titanium, pores are generated due to a defective shield during welding, the color of the bead (wedge) changes, and cracks occur in the welded part due to embrittlement caused by oxidation and nitrification. Further, since the discoloration of the beads becomes a standard standard for determining the quality of welding, the importance of shield management becomes even greater. Due to this necessity, a trailing shield jig is used to provide a complete shielding atmosphere even when welding titanium or the like.

Fig. 1 shows a schematic configuration of a conventional trailing shield jig.

1, the conventional trailing shield jig 1 includes a hose band 7 for fixing the torch 9, a shield gas supply hose 5 for supplying a shield gas, And a silicon pad 4 for protecting the welded portion. The trailing shield jig 1 constructed as described above performs welding while moving along the groove 3 formed in the base material 6 such as a pipe.

However, the conventional trailing shield jig has a bottom surface having the same diameter and shape as the radial size of the base material surface formed by the pipe, so that the pipe diameter of the base material surface to be welded is changed or applied to a flat base material There is a problem that a separate jig designed to have a bottom surface of a different shape needs to be prepared and replaced.

Therefore, it is necessary to manufacture a number of jigs that can be applied for each diameter of the pipe, which is accompanied by the following cost and deterioration of workability due to the troublesome replacement during the welding work.

Korea public utility model publication 2012-0002616 publication date (April 17, 2012) Korean Laid-open Patent Publication No. 2015-0057554 (Published date: 2015.05.28)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a case in which a diameter of a bottom surface can be variously changed by bending a plurality of knob pieces, The present invention provides a flexible type trailing shield jig that can be applied to a base material surface of a member having various shapes and diameters by applying a supply pipe and an iron mesh.

According to an aspect of the present invention, there is provided a plasma processing apparatus including a case having a bottom surface positioned adjacent to a surface of a welding base material, a gas supply pipe for supplying a gas into the case, And a holder which is formed at one side of the case and detachably fixes the welding torch, wherein the case has a plurality of adjoining nodal pieces which are bent to be mutually bendable to correspond to various shapes and diameters of the base material surface The trailing shield jig of the flexible type is provided.

The gas supply pipe may be formed of a flexible material that can be bent in a shape corresponding to the bent shape of the case.

And a spring tube (SPRING TUBE) fixedly coupled to one side of the case to keep the case bent in a shape corresponding to the surface of the base material.

And an iron mesh (IRON MESH) disposed on at least one of the inner side and the outer side of the gas supply pipe adjacent to the base material side and the case side to disperse the gas sprayed through the gas supply pipe.

The iron mesh may be formed with a wrinkle so as to be bent in a shape corresponding to the bent shape of the case.

According to the flexible type trailing shield jig of the present invention, it is possible to apply to both welding of a base material surface having various shapes and diameters, such as a flat plate, a pipe, and the like, through one shielding jig, thereby manufacturing a shielding jig having various dimensions And it is possible to reduce the following cost, and it is unnecessary to replace the shielding jig during the welding operation, so that the working efficiency can be remarkably improved.

1 is a perspective view showing a state in which a conventional trailing shield jig is installed,
2 is a side sectional view showing a trailing shield jig according to an embodiment of the present invention,
3 is an enlarged side sectional view of a flat portion of the trailing shield jig shown in Fig. 2, Fig.
4 is a plan view showing a trailing shield jig according to an embodiment of the present invention,
FIG. 5 is a side view showing a use state of a trailing shield jig according to an embodiment of the present invention. FIG.

The technical features of the trailing sealing jig according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 2 is a side sectional view of a trailing sealing jig 10 according to an embodiment of the present invention, FIG. 3 is an enlarged side sectional view of a flat portion of the trailing shield jig shown in FIG. 2, FIG. 5 is a plan view of a trailing sealing jig 10 according to an embodiment of the present invention.

The trailing shield jig 10 according to the present invention can be applied to various base materials such as pipes, flat plates and the like. Now, the trailing shield jig 10 according to the present invention will be described with reference to an example in which a pipe is applied, and an example in which the pipe is applied to a pipe having a relatively small diameter and a pipe having a relatively large diameter will be described.

2 to 4, the trailing sealing jig 10 of the present invention includes a case 100, a gas supply pipe 200, and a holder 300. The trailing sealing jig 10 includes a case 100, a gas supply pipe 200, The welding is carried out while moving.

The case 100 is configured such that a bottom surface 110 formed on a mold corresponding to a base material is seated around the welding part of the base material so that the welding part is shielded from the outside.

The gas supply pipe 200 is connected from the outside of the case 100 to the inside to supply a shield gas to the welded portion. For example, the gas supply pipe 200 may be installed to penetrate the inside of the case 100 in the front-rear direction, and a plurality of gas holes 210 for discharging the shield gas supplied to the inside may be formed do. For reference, the gas hole 210 may be formed to have a predetermined angle toward the upper portion so as to be uniformly injected into the case 100 through the shield gas introduced from the outside.

At least one of the inside and outside of the gas supply pipe 200 may be provided with an iron mesh 140. The iron mesh 140 is formed by forming a plurality of through holes 141a on a thin plate that defines the upper and lower portions of the inside of the case to uniformly disperse the shield gas injected from the gas supply pipe 200 into the case 100, Will be described later.

The holder 300 detachably fixes the welding torch to one side of the case 100 so that the welding operation can be performed.

Although not shown in the drawing, a silicon pad may be further provided on the side of the bottom surface 110 of the case 100 to prevent air from entering the welding portion in the case 100 from the outside.

According to the present embodiment, the case 100 is formed so that a plurality of the segment pieces 400 adjacent to each other in the circumferential direction of the pipe-shaped base material can be bent so as to be able to correspond to various shapes and diameters of the base material surface . Specifically, each of the plurality of nose pieces 400 is connected to each of the adjacent nose pieces 400 by a hinge so as to be foldable, and each of the other nose pieces 400, As shown in FIG.

Therefore, when the case 100 made of a plurality of the nail pieces 400 is brought into close contact with the surface of the base material of the pipe shape, adjacent nail pieces 400 can be bent and brought into close contact with the surface of the base material. At this time, the gas supply pipe 200 leading to the inside of the case 100 may be made of a flexible material and be bent in a corresponding shape according to the bending of the case 100. In addition, the iron mesh 140 installed inside or outside the gas supply pipe 200 is formed with corrugations so that it can be bent together with the gas supply pipe 200.

3, the iron mesh 140 includes a first iron mesh 141 installed on the outer side of the gas supply pipe 200 (the outer side of the case) And a second iron mesh 142 installed in the base material (in the direction of the base material surface). As shown in FIG. 3, the first iron mesh 141 and the second iron mesh 142 are formed with through holes 141a and 142a, respectively. The through holes 142a of the second iron mesh 142 adjacent to the base material surface May be formed to be denser than the through holes 141a of the first iron mesh 141. [ Shield gas sprayed from the gas holes 210 of the gas supply pipe 200 is first dispersed in the interior of the case 100 by the first iron mesh 141, By being dispersed secondarily by the second iron mesh 142, the shield gas can be uniformly sprayed over the entire welded area.

In addition, according to an embodiment of the present invention, a spring tube 120 coupled to one side of the case 100 may be further included. 2 and 4, the spring tube 120 is fixedly coupled to left and right corner portions of the case 100 so as to extend in a direction away from the holder 300 in the case 100, So that the bottom surface 110 of the case 100, which varies depending on the shape of the base material and the size of the base material, is held to maintain a constant shape.

5 shows a state of use of the shield jig 10 according to an embodiment of the present invention. As shown in FIG. 5, the shield jig 10 of the present invention having the above-described configuration can be used simultaneously on the base material surface having various shapes and diameters. That is, by forming the bottom surface 110 corresponding to the shape of the base material surface and the diameter of the base material piece 400 by bending, the small diameter P1 and the large diameter And can be applied to the base material of the pipe P2. In addition, the nodule piece 400 of the case 100 can be arranged in a straight line, and can be applied to a base material of a flat plate shape. When the shape of the bottom surface 110 of the case 100 becomes a state corresponding to the surface of the base material due to the bending of the knife piece 400, 110 are fixed, the welding operation is performed by moving along the groove formed in the base material. The first iron mesh 141 and the second iron mesh 142 formed with the corrugated flexible gas supply pipe 200 and the second iron mesh 142 provided inside the case 100 are also formed in the shape of the bottom surface 110 of the case 100 The shield gas can be stably supplied and dispersed into the inside of the case.

Although the trailing shield jig according to the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that various modifications and equivalent embodiments are possible without departing from the scope of the present invention by those skilled in the art . Accordingly, the scope of the true technical protection should be determined by the technical idea of the appended claims.

10: Shield jig
100: Case
110: bottom surface
120: spring tube
200: gas supply pipe
210: gas hole
300: Holder
400:
140: Iron mesh

Claims (5)

A case (100) having a bottom surface (110) positioned adjacent to the shape of the welding base material;
A gas supply pipe (200) for supplying gas into the case (100) and injecting gas into the surface of the base material; And
A holder 300 formed at one side of the case 100 to detachably fix the welding torch; , ≪ / RTI >
The case (100) is formed so that a plurality of adjacent muzzle pieces (400) in one direction are coupled to each other so as to be able to bend, so as to be able to cope with various shapes and diameters of the surface of the base material. . The method according to claim 1,
Wherein the gas supply pipe (200) is formed of a flexible material that can be bent in a shape corresponding to a bent shape of the case (100). The method according to claim 1,
And a spring tube (120) fixedly coupled to one side of the case (100) to keep the case (100) bent in a shape corresponding to the surface of the base material. Jig. The method according to claim 1,
An iron mesh 140 installed at least on one side of the inner side or outer side of the gas supply pipe 200 adjacent to the base material side and the case 100 to disperse the gas injected through the gas supply pipe 200, Wherein the trailing shield jig is further provided with: 5. The method of claim 4,
Wherein the iron mesh (140) is formed with wrinkles so that the iron mesh (140) can be bent in a shape corresponding to the bent shape of the case (100).
KR1020150169763A 2015-12-01 2015-12-01 Flexible type trailing shield jig KR20170064243A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150169763A KR20170064243A (en) 2015-12-01 2015-12-01 Flexible type trailing shield jig

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Application Number Priority Date Filing Date Title
KR1020150169763A KR20170064243A (en) 2015-12-01 2015-12-01 Flexible type trailing shield jig

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KR20170064243A true KR20170064243A (en) 2017-06-09

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KR1020150169763A KR20170064243A (en) 2015-12-01 2015-12-01 Flexible type trailing shield jig

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200020096A (en) * 2018-08-16 2020-02-26 대우조선해양 주식회사 Trailing shield jig
CN114248047A (en) * 2021-12-03 2022-03-29 渤海造船厂集团有限公司 Flexible continuous clean welding back gas protection device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200020096A (en) * 2018-08-16 2020-02-26 대우조선해양 주식회사 Trailing shield jig
CN114248047A (en) * 2021-12-03 2022-03-29 渤海造船厂集团有限公司 Flexible continuous clean welding back gas protection device

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