CN101898273A - Method for carrying out simulated training of non-melt argon tungsten-arc welding on liquefied natural gas (LNG) carrier for welders - Google Patents
Method for carrying out simulated training of non-melt argon tungsten-arc welding on liquefied natural gas (LNG) carrier for welders Download PDFInfo
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Abstract
The invention relates to a method for carrying out a simulated training of non-melt argon tungsten-arc welding on a liquefied natural gas (LNG) carrier for welders, which needs to simulate the welding between film materials on a cargo tank containment system on the LNG carrier. The method comprises the following steps: firstly, clamping the welded seam of a specimen needing to be welded by using a clamping tool, and then, carrying out fixed-position welding; then, lining and pressing a radiating component at the edge of the welded seam, and clamping the radiating component by using the clamping tool; and finally, enabling the nozzle of a welding torch to be close to the edge of the radiating component for welding, and removing the clamping tool after welding. The method of the invention performs important functions of avoiding the weld penetration of invar film materials by welders in operation and controlling the post welding distortion, and greatly improves the training efficiency and effect of manual TIG welding.
Description
Technical field
The present invention relates to the manufacturing of LNG ship, particularly relate to a kind of method of non-melt argon tungsten-arc welding welder simulated training before practical operation on the LNG ship.
Background technology
Along with China's rapid growth of economy, country is also increasing to the demand of the energy, and liquefied natural gas (LNG) is mainly used in thermal power generation, gas, steel and iron industry as a kind of ideal green fuel.Because therefore its cleaning, efficient, cheap has become the highest priority that China develops the beginning of this century.The LNG ship is as the main means of transport of LNG, and one of them main cargo hold type is the GTNO.96E-2 film-type, and it needs to guarantee the ability of-163 ℃ of following transport natural gas.The cargo tank containment system of LNG ship is the bulk container that holds liquefied natural gas on the LNG ship, and its manufacturing just seems particularly important, and it is to adopt the invar film of 0.5～1.5mm thickness to be welded that cargo tank is made main material.As requested: LNG ship cargo tank containment system is before manufacturing, the welding method that the shipyard should plan be adopted with regard to their and identify that rules obtain the approval of classification society and GTT wherein participates in the non-melt argon tungsten-arc welding of craft (the being called for short the manual TIG weldering) welder that manufactures also at the row of needs evaluation.
Manual TIG welder's training is that the form of simulated solution cargo hold containment system manufacturing and the sub-assembly sample of locus carry out according to the requirement of evaluation rules.The welder will reach the solder technology requirement in the training time of regulation, but can there be following problems of welded quality in the welder in the training operation:
1. welder's operating gesture shakiness, when carrying out the thin-film material welding, easy burn-through.Though flame-retardant layer on the back of weld pad, it only plays certain heat-blocking action, and the wooden insulated case under can causing the molten drop of burn-through is burned, and serious even wooden case can be lighted.
2. weld defect such as the bad or burn-through of the fusion penetration of welding point can cause tightness of welding lines of poor quality, thereby cause cargo tank to leak.
3. the welder is free-hand carries out all-position welding, causes weld seam linearity difference or appearance of weld not attractive in appearance.
4. thin-film material is subjected to the unequal heating and cooling of welding arc, causes post welding distortion obvious.
Cause the main cause of the problems referred to above that 2 points are arranged: the one, the invar material that is welded is thin; The 2nd, welder's operating gesture instability, the control to bath temperature during welding is difficult for grasping.
From above-mentioned reason, the thickness of material is set, mainly is exactly how to overcome the problems of welded quality that the free-hand operation shakiness of welder causes.
Summary of the invention
Purpose of the present invention is overcoming the deficiency that above-mentioned prior art exists, and a kind of method of welder on the LNG ship being carried out TIG weldering simulation training is provided.Operational procedure and specific purpose tool that simulation training method of the present invention design is suitable accomplish stablize welder's gesture, control bath temperature, make appearance of weld attractive in appearance and reduce welding deformation.
In order to reach the foregoing invention purpose, technical scheme provided by the invention is as follows:
A kind of method of the welder being carried out the non-melt argon tungsten-arc welding simulation training of LNG ship, it is characterized in that, cargo tank containment system upper film storeroom welding on the simulation LNG carrier, carrying out tack welding earlier after the weld seam of required welded specimen clamped with clamping tool connects, and then weld edge lining is pressed thermal component and is clamped with clamping tool, the edge that the nozzle of welding torch is abutted against thermal component welds at last, removes clamping tool after welding is finished.
Further, method of the present invention comprises following concrete steps:
Weld shape between the thin-film material of 1. confirming to need to weld on the simulation liquid tank containment system on the LNG ship, shape according to weld seam is selected suitable clamping tool, and the corresponding thermal component of making, described clamping tool can be regulated clamping dynamics and size, and this thermal component size and dimension is according to the length and the geometry settings of weld seam;
2. utilizing clamping tool to regulate and clamping needs two of welding simulation invar material, and lays heat-barrier material at two simulation invar storerooms, moves towards advanced spot welding along weld seam and fixes;
3. dismantle clamping tool down, the thermal component that will complete in advance is placed on weld edge then, and the adjustable clamp clamping tool guarantees that with thermal component and material to be welded clamping the scope of operation of thermal component is alignd with weld seam with the backer as welding torch;
4. open the welding machine of non-melt argon tungsten-arc welding, the nozzle of welding torch is abutted against described thermal component scope of operation edge to stablize welder's gesture, weld until welding along weld seam near the described scope of operation and finish;
5. remove clamping tool, thermal component is taken off, check the welding quality of weld seam.
In the present invention, described clamping tool includes alligator forceps and shoulder pole folder, the structure of described alligator forceps includes handle, two angle coupling mouths, one end of angle coupling mouth is hinged, and being provided with the spring that can make angle coupling mouth other end spring closure in the hinged place, an end of described handle is fixed in the middle part of described curved mouthful of folder; Described shoulder pole folder includes clamping bar and is fixed in a plurality of pressure heads of regulating on the clamping bar, and it is fixed with the shoulder pole clamping that the two ends of clamping bar are provided with the screw that hold-down screw passes on the simulation invar material to be welded.
In the present invention, described thermal component is made by heat dispersion high metal material such as copper, aluminium etc., and this thermal component is provided with working face, and the size and the geometry of this working face and weld seam are close.
Based on technique scheme, analogy method of the present invention has following technological merit than prior art:
The utilization heat sink material gives exercise training as the manual TIG weldering of the auxiliary welding of frock facility invar thin-film material and manufactures in the method for the present invention, has changed originally free-handly to carry out that the welding linearity that all-position welding invar thin-film material brought is poor, appearance of weld is not attractive in appearance; Simultaneously to preventing that invar thin-film material burn-through, control post welding distortion from having played very big effect; Realized the welding point of high-quality invar material; And make the training efficiency and the effect of manual TIG weldering improve greatly.By the successful manufacturing of many LNG ships, the simple and practical property of this frock has obtained fully proving in practice.
Description of drawings
Fig. 1 is the welding position schematic diagram of containment system simulation welding on the LNG ship.
Fig. 2 is the specification requirement schematic diagram that different-thickness invar material welds.
Fig. 3 is that the present invention carries out the schematic diagram of the method for the non-melt argon tungsten-arc welding simulation training of LNG ship to sample vertical position welding welding to the welder.
Fig. 4 is that the present invention carries out the schematic diagram of the method for the non-melt argon tungsten-arc welding simulation training of LNG ship to sample overhead welding welding to the welder.
Fig. 5 is that the present invention carries out utilizing in the method for the non-melt argon tungsten-arc welding simulation training of LNG ship the shoulder pole folder to carry out the schematic diagram of weld clamp to the welder.
The specific embodiment
Below we come the method that the welder is carried out the non-melt argon tungsten-arc welding simulation training of LNG ship of the present invention done further with specific embodiment in conjunction with the accompanying drawings and elaborate; in the hope of more cheer and bright elaboration methods and applications of the present invention, but can not limit protection scope of the present invention with this.
On the LNG ship, when the welders training result to the TIG welding identifies, need overcome the free-hand fluctuation of service of welder, and then make that control is difficult for grasping to bath temperature when welding, and cause the welding between the invar parts quality problems to occur.When identifying, need simulate the liquid tank containment system on the LNG carrier, make various types of weld seams all can present, get in touch operation for the welder.It is different that the weld size of the invar material of different-thickness requires, and Fig. 1 is the welding position schematic diagram of containment system simulation welding on the LNG ship, and welding shape that it is general and various weld size require as shown in Figure 2 with shown in the following table:
Annotate: minimum throat depth (R): the nominal limiting value that these throat depth values allow when being macro-graph.
In order to reach above-mentioned specification requirement, when the welder is giveed training, need to select suitable Training Methodology and training accessory.Method thinking of the present invention is exactly in order to make the welder free-hand weldering to reach the evaluation requirement in regulation in the training time, to obtain qualification authentication, for the welding of carrying out the invar storeroom on the LNG ship provides the welding service.
The welder is carried out in the method for the non-melt argon tungsten-arc welding simulation training of LNG ship in the present invention, need simulate welding to cargo tank containment system upper film storeroom on the simulation LNG carrier, carrying out tack welding earlier after first weld seam to required welded specimen clamps with clamping tool connects, and then weld edge lining is pressed thermal component and is clamped with clamping tool, the edge that the nozzle of welding torch is abutted against thermal component welds at last, removes clamping tool after welding is finished.
Further, method of the present invention comprises following concrete steps;
Weld shape between the thin-film material of 1. confirming to need to weld on the simulation liquid tank containment system on the LNG ship, shape according to weld seam is selected suitable clamping tool, and the corresponding thermal component of making, described clamping tool can be regulated clamping dynamics and size, and this thermal component size and dimension is according to the length and the geometry settings of weld seam;
2. utilizing clamping tool to regulate and clamping needs two of welding simulation invar material, and lays heat-barrier material at two simulation invar storerooms, moves towards advanced spot welding along weld seam and fixes;
3. dismantle clamping tool down, the thermal component that will complete in advance is placed on weld edge then, and the adjustable clamp clamping tool guarantees that with thermal component and material to be welded clamping the scope of operation of thermal component is alignd with weld seam with the backer as welding torch;
4. open the welding machine of non-melt argon tungsten-arc welding, the nozzle of welding torch is abutted against described thermal component scope of operation edge to stablize welder's gesture, weld until welding along weld seam near the described scope of operation and finish;
5. remove clamping tool, thermal component is taken off, check the welding quality of weld seam.
Below several embodiment are operating process of different parts welding on the simulated solution cargo hold of LNG ship, purpose is further to confirm method of the present invention from putting into practice.
Present embodiment is the welding operation of the vertical plane on the cargo tank of LNG carrier being carried out thin-film material, and purpose is the technology and the process of training welder vertical position welding welding between two blocks of invar thin-film materials on to vertical plane.
As shown in Figure 3, Fig. 3 is that the present invention carries out the schematic diagram of the method for the non-melt argon tungsten-arc welding simulation training of LNG ship to sample vertical position welding welding to the welder.As seen from the figure, when welding operation, to be placed on the wood blocks 3 as the second invar thin-film material e2 of substrate, the place pad that contacts with wood blocks 3 at weld seam position to be welded is established a heat-barrier material 2 then, its objective is to prevent that wood blocks Yin Wendu is too high and burn.The first invar thin-film material e1 is placed on the second invar thin-film material e2, aim at the weld seam 4 that needs welding, the weld seam at this place is fairly simple, is the straight bead of upper and lower settings, is in the place that the edge of the first invar thin-film material e1 contacts with the second invar thin-film material e2.
With two blocks of invar thin-film materials fit finish after, select suitable clamping work pieces, clamping tool herein is an alligator forceps 1, the structure of described alligator forceps includes handle, two angle coupling mouths, one end of angle coupling mouth is hinged, and being provided with the spring that can make angle coupling mouth other end spring closure in the hinged place, an end of described handle is fixed in the middle part of described curved mouthful of folder.
For heat radiation fully in welding process, and for welder's welding operation provides the welding position standard, and stable welder's welding gesture, be provided with thermal component between clamping tool and the first film invar material e1, the size and dimension of thermal component is according to the position of weld seam and shaped design.Be directed to the characteristics of vertical position welding operation of the present invention and vertical weld seam, thermal component herein is a heat sink strip 5, is a square column.One side bottom of this heat sink strip 5 is near position while welding, whole side and and then as the backer of when welding welding torch 6, the side of this moment is then as a scope of operation, backer herein is a proprietary term, and the meaning is to be close to standard and judgment parts close and that walk forward as welding torch.
After stand-by alligator forceps 1 and heat sink strip 5 are fixed two blocks of film invar materials tightly, open the welding machine of non-melt argon tungsten-arc welding (manual TIG weldering), the scope of operation edge that the nozzle of welding torch 6 is abutted against heat sink strip 5 welds until welding along weld seam near the described scope of operation and finishes to stablize welder's gesture; At last, remove clamping tool, thermal component is taken off, check the welding quality of weld seam.
Present embodiment is the welding operation of the face of looking up on the cargo tank of LNG carrier being carried out thin-film material, and purpose is the technology and the process of training welder welding between two blocks of invar thin-film materials on to the end face of cargo tank.
As shown in Figure 4, Fig. 4 is that the present invention carries out the schematic diagram of the method for the non-melt argon tungsten-arc welding simulation training of LNG ship to sample overhead welding welding to the welder.As seen from the figure, this operation is that invar thin-film material with a circle is welded on the invar material a at cargo tank top as repair welding liner plate b.Weld seam herein then is positioned at the edge of repair welding liner plate b, is the weld seam of a circle.
With two blocks of invar thin-film materials fit finish after, select suitable clamping work pieces, clamping tool herein is an alligator forceps 7, the structure of described alligator forceps includes handle, an angle coupling mouth, one end of angle coupling mouth is hinged, and being provided with the spring that can make angle coupling mouth other end closure in the hinged place, an end of described handle is fixed on the described curved mouthful of folder.
For heat radiation fully in welding process, and for welder's welding operation provides the welding position standard, and stable welder's welding gesture, between clamping tool and repair welding liner plate b, being provided with thermal component, the size and dimension of thermal component is according to the position of weld seam and shaped design.Be directed to the characteristics of overhead welding operation of the present invention and repair welding weld seam, thermal component herein is the heat sink 8 of a circle, and heat sink 8 is positioned at the inboard of circular weld seam just, and the distance between its edge and the weld seam is fit to place welding torch 6 just.The edge side bottom of this heat sink 8 is near position while welding, whole side is then as the backer of when welding welding torch 6, the side of this moment is then as a scope of operation, and backer herein is a proprietary term, and the meaning is to be close to standard and judgment parts close and that walk forward as welding torch.
Stand-by alligator forceps 7 and heat sink 8 will be fixed on the film invar material at top as the invar material of repair welding liner plate and after clamping, open the welding machine of non-melt argon tungsten-arc welding (manual TIG weldering), the scope of operation edge that the nozzle of welding torch 6 is abutted against heat sink 8 welds until welding along weld seam near the described scope of operation and finishes to stablize welder's gesture; At last, remove clamping tool, thermal component is taken off, check the welding quality of weld seam.
Present embodiment is the welding operation of the bottom surface on the cargo tank of LNG carrier being carried out thin-film material, and purpose is the technology and the process of training welder welding between two blocks of invar thin-film materials on to the bottom surface of cargo tank.
As shown in Figure 5, Fig. 5 is that the present invention carries out utilizing in the method for the non-melt argon tungsten-arc welding simulation training of LNG ship the shoulder pole folder to carry out the schematic diagram of weld clamp to the welder.As seen from the figure, this operation is that invar thin-film material with a circle is welded on the invar material of cargo tank bottom.Weld seam herein then is positioned at the edge of two blocks of invar materials, is a linear weld seam.
In the present embodiment, be directed to the position and the shape of weld seam, select for use shoulder pole folder 9 to fix as clamping tool.Described shoulder pole folder 9 includes clamping bar 91 and is fixed in a plurality of pressure heads 92 of regulating on the clamping bar, and the two ends of clamping bar 91 are provided with the screw that hold-down screw passes on the simulation invar material to be welded the shoulder pole clamping is fixed on the invar material.
For heat radiation fully in welding process, and for welder's welding operation provides the welding position standard, and stable welder's welding gesture, be provided with thermal component between the pressure head regulated 92 of shoulder pole folder 9 and invar welding material, the size and dimension of thermal component is according to the position of weld seam and shaped design.
Be directed to the characteristics of downhand welding operation of the present invention and side seam, thermal component herein is a long heat sink strip.One side bottom of this heat sink strip is near position while welding, whole side and and then as the backer of when welding welding torch, the side of this moment is then as a scope of operation, backer herein is a proprietary term, and the meaning is to be close to standard and judgment parts close and that walk forward as welding torch.
Class of operation in remaining welding operation and embodiment 1 and 2 seemingly.
In an embodiment of the present invention, described thermal component is made by heat dispersion high metal material such as copper, aluminium etc., and this thermal component is provided with the working face, and the size and the geometry of this working face and weld seam are close.
The present invention uses heat sink material to give the exercise and the manufacturing training as the manual TIG weldering of the auxiliary welding of frock facility invar thin-film material, changed and originally free-handly carried out that the welding linearity that all-position welding invar thin-film material brought is poor, appearance of weld is not attractive in appearance, simultaneously to preventing invar thin-film material burn-through, the control post welding distortion has played certain effect, realize the welding point of high-quality invar material, and made the training efficiency and the effect of manual TIG weldering improve greatly.
Claims (4)
1. method of the welder being carried out the non-melt argon tungsten-arc welding simulation training of LNG ship, it is characterized in that, cargo tank containment system upper film storeroom welding on the simulation LNG carrier, carrying out tack welding earlier after the weld seam of required welded specimen clamped with clamping tool connects, clamp at weld edge lining pressure thermal component and with clamping tool then, the edge that the nozzle of welding torch is abutted against thermal component welds at last, removes clamping tool after welding is finished.
2. a kind of method that the welder is carried out the non-melt argon tungsten-arc welding simulation training of LNG ship according to claim 1, this method comprises following concrete steps:
Weld shape between the thin-film material of 1. confirming to need to weld on the simulation liquid tank containment system on the LNG ship, shape according to weld seam is selected suitable clamping tool, and the corresponding thermal component of making, described clamping tool can be regulated clamping dynamics and size, and this thermal component size and dimension is according to the length and the geometry settings of weld seam;
2. utilizing clamping tool to regulate and clamping needs two of welding simulation invar material, and lays heat-barrier material at two simulation invar material back sides, moves towards advanced spot welding along weld seam and fixes;
3. dismantle clamping tool down, the thermal component that will complete in advance is placed on weld edge then, and the adjustable clamp clamping tool guarantees that with thermal component and material to be welded clamping the scope of operation of thermal component is alignd with weld seam with the backer as welding torch;
4. open the welding machine of non-melt argon tungsten-arc welding, the nozzle of welding torch is abutted against described thermal component scope of operation edge to stablize welder's gesture, weld until welding along weld seam near the described scope of operation and finish;
5. remove clamping tool, thermal component is taken off, check the welding quality of weld seam.
3. a kind of method of the welder being carried out the non-melt argon tungsten-arc welding simulation training of LNG ship according to claim 2, described clamping tool includes alligator forceps and shoulder pole folder, the structure of described alligator forceps includes handle, two angle coupling mouths, one end of angle coupling mouth is hinged, and being provided with the spring that can make angle coupling mouth other end spring closure in the hinged place, an end of described handle is fixed in the middle part of described curved mouthful of folder; Described shoulder pole folder includes clamping bar and is fixed in a plurality of pressure heads of regulating on the clamping bar, and it is fixed with the shoulder pole clamping that the two ends of clamping bar are provided with the screw that hold-down screw passes on the simulation invar material to be welded.
4. a kind of method of the welder being carried out the non-melt argon tungsten-arc welding simulation training of LNG ship according to claim 2, described thermal component is made by the high metal material of heat dispersion, this thermal component is provided with working face, and the size and the geometry of this working face and weld seam are close.
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|---|---|---|---|---|
| CN105537737A (en) * | 2015-12-31 | 2016-05-04 | 山东大学 | Narrow gap welding method for vertical weld position of liquified natural gas storage tank |
| CN109175750A (en) * | 2018-08-20 | 2019-01-11 | 北京长城华冠汽车科技股份有限公司 | A method of reducing automobile body welding deformation |
| CN110814557A (en) * | 2019-09-25 | 2020-02-21 | 沪东中华造船(集团)有限公司 | LNG ship welder examination and re-certification method |
| CN110877699A (en) * | 2019-11-19 | 2020-03-13 | 沪东中华造船(集团)有限公司 | Method for welding reinforcing ribs on reverse side of LNG ship cargo tank hull |
| CN111681481A (en) * | 2020-05-07 | 2020-09-18 | 沪东中华造船(集团)有限公司 | Vertical electrogas welding welder training device and using method |
| CN113560695A (en) * | 2021-08-05 | 2021-10-29 | 上海外高桥造船有限公司 | Training tool for welding of mail steamer sheets and using method |
| CN114309941A (en) * | 2022-01-13 | 2022-04-12 | 上海蓝魂环保科技有限公司 | Combined tool and method for metal sheet structure edge-curling welding construction |
| CN114799425A (en) * | 2022-06-30 | 2022-07-29 | 中国空气动力研究与发展中心高速空气动力研究所 | Welding process for invar steel medium plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105537737A (en) * | 2015-12-31 | 2016-05-04 | 山东大学 | Narrow gap welding method for vertical weld position of liquified natural gas storage tank |
| CN105537737B (en) * | 2015-12-31 | 2018-04-13 | 山东大学 | A kind of liquefied natural gas storage tank founds the narrow gap welding method of seam position |
| CN109175750A (en) * | 2018-08-20 | 2019-01-11 | 北京长城华冠汽车科技股份有限公司 | A method of reducing automobile body welding deformation |
| CN110814557A (en) * | 2019-09-25 | 2020-02-21 | 沪东中华造船(集团)有限公司 | LNG ship welder examination and re-certification method |
| CN110877699A (en) * | 2019-11-19 | 2020-03-13 | 沪东中华造船(集团)有限公司 | Method for welding reinforcing ribs on reverse side of LNG ship cargo tank hull |
| CN111681481A (en) * | 2020-05-07 | 2020-09-18 | 沪东中华造船(集团)有限公司 | Vertical electrogas welding welder training device and using method |
| CN113560695A (en) * | 2021-08-05 | 2021-10-29 | 上海外高桥造船有限公司 | Training tool for welding of mail steamer sheets and using method |
| CN114309941A (en) * | 2022-01-13 | 2022-04-12 | 上海蓝魂环保科技有限公司 | Combined tool and method for metal sheet structure edge-curling welding construction |
| CN114799425A (en) * | 2022-06-30 | 2022-07-29 | 中国空气动力研究与发展中心高速空气动力研究所 | Welding process for invar steel medium plate |
| CN114799425B (en) * | 2022-06-30 | 2022-11-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Invar steel medium plate welding process |
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