JP4899119B2 - Butt welding method - Google Patents
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- JP4899119B2 JP4899119B2 JP2005313934A JP2005313934A JP4899119B2 JP 4899119 B2 JP4899119 B2 JP 4899119B2 JP 2005313934 A JP2005313934 A JP 2005313934A JP 2005313934 A JP2005313934 A JP 2005313934A JP 4899119 B2 JP4899119 B2 JP 4899119B2
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- 238000003466 welding Methods 0.000 title claims description 69
- 238000000034 method Methods 0.000 title claims description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 49
- 229910052802 copper Inorganic materials 0.000 claims description 49
- 239000010949 copper Substances 0.000 claims description 49
- 239000007789 gas Substances 0.000 claims description 19
- 238000003825 pressing Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000004907 flux Effects 0.000 description 21
- 239000011521 glass Substances 0.000 description 14
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 239000011819 refractory material Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000002390 adhesive tape Substances 0.000 description 6
- 230000002411 adverse Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 241000167857 Bourreria Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Description
この発明は、平板同士の突合せ溶接部裏面に敷く銅裏当ての密着性を良くして溶接部裏面の健全性を高めた突合せ溶接方法に関するものである。 The present invention relates to a butt welding method in which the adhesiveness of a copper backing laid on the back of butt welds between flat plates is improved to improve the soundness of the back of the welds.
従来一般の突合せ溶接方法は、図４（ａ）（ｂ）に示すように、水平板２１Ａ，２１Ｂの開先部２２の下面に溶接用銅裏当て２３を敷いて密着性を良くして片面テイグ溶接をおこなっている。図４（ａ）に示す事例は、平板２１Ａ，２１Ｂ同士の突合せ開先部２２の下面に銅裏当て２３を敷いて、門型のストロンバック２４を溶接によって取り付け、このストロンバック２４と銅裏当て２３の間にクサビ状の角矢２５を打ち込んで、銅裏当て２３を押付けて平板２１Ａ，２１Ｂの下面に密着させている。図４（ｂ）に示す事例は、門型のストロンバック２４の内側に断面コ状のチャンネル材のケース２６を固定し、所定間隔を置いて複数の支持ボルト２７と押えボルト２８を取り付け、この押えボルト２８の締付けによって銅裏当て２３を押さえつけ密着性をさらに向上させている。 As shown in FIGS. 4 (a) and 4 (b), the conventional general butt welding method has a copper backing 23 for welding on the lower surface of the groove portion 22 of the horizontal plates 21A and 21B to improve the adhesion and provide a single side. Teg welding is performed. In the example shown in FIG. 4A, a copper backing 23 is laid on the lower surface of the butt groove portion 22 between the flat plates 21A and 21B, and a gate-shaped stronback 24 is attached by welding. A wedge-shaped square arrow 25 is driven between the pads 23, and the copper backing plate 23 is pressed against the lower surfaces of the flat plates 21A and 21B. In the case shown in FIG. 4B, a case 26 of a channel material having a U-shaped cross section is fixed inside a portal-shaped Stronback 24, and a plurality of support bolts 27 and presser bolts 28 are attached at predetermined intervals. By tightening the presser bolt 28, the copper backing 23 is pressed down to further improve the adhesion.
また、開先部の隙間を埋めて密着性を向上させた従来技術の発明には、本出願人による例えば特開平１１−１５６５９０号公報に開示されている「溶接用裏当て」がある。この発明技術は、被溶接開先部の形状及び間隔の変化に適応した溶接用裏当である。 Further, the invention of the prior art in which the gap between the groove portions is filled to improve the adhesion includes “welding backing” disclosed in, for example, Japanese Patent Application Laid-Open No. 11-156590 by the present applicant. The technique of the present invention is a welding backing adapted to changes in the shape and interval of a welded groove portion.
また、図５（ａ）（ｂ）に示すように、ビード形成用のフラックス２９を用いてサブマージアーク溶接を行う方法があった。 図５（ａ）は、突き合わせた平板２１Ａ,２１Ａの開先部２２下面に裏フラックス２９Ｂを均一な厚さに敷き、その下部を銅裏当て２３で支え、さらにその銅裏当て２３をエアーホース３０で押上げることにより、開先部２２の裏面に表フラックス２９Ａを押し当てて片面からサブマージアーク溶接を行うものである。図５（ｂ）は、突き合わせた平板２１Ａ,２１Ｂの開先部２２の下面に桶型の裏当て治具３１を設置し、この裏当て治具３１内に下敷きフラックスを入れた袋３２を置き、その上に裏フラックス２９Ｂをまき、その下方に配置したエアーホース３３を膨張させることにより、開先裏面に裏フラックス２９Ｂを押し当てて片面からサブマージアーク溶接を行うものである。 Further, as shown in FIGS. 5A and 5B, there has been a method of performing submerged arc welding using a flux 29 for forming beads. FIG. 5A shows that the back flux 29B is laid on the bottom surface of the groove portion 22 of the flat plates 21A and 21A with a uniform thickness, the lower portion thereof is supported by a copper backing 23, and the copper backing 23 is further supported by an air hose. By pushing up at 30, the front flux 29A is pressed against the back surface of the groove portion 22, and the submerged arc welding is performed from one side. In FIG. 5B, a saddle-shaped backing jig 31 is installed on the lower surface of the groove portion 22 of the flat plates 21A and 21B that are abutted, and a bag 32 containing an underlay flux is placed in the backing jig 31. Then, the back flux 29B is coated on the air hose 33, and the air hose 33 disposed therebelow is expanded to press the back flux 29B against the groove back surface to perform submerged arc welding from one side.
また、図６（ａ）（ｂ）に示すように、シート状の耐火部材３７を裏面に接着させてマグ溶接を行う片面溶接法があった。図６（ａ）は突き合わせた平板２１Ａ,２１Ａの開先部２２下面にガラステープ３５と固形フラックス３６と耐火材を張り合わせたシート状の耐火部材３７を、両面接着テープ３４で接着することにより、開先部２２の裏面に密着させて片面から主にマグ溶接を行うものである。図６（ｂ）は、突き合わせた平板２１Ａ,２１Ａの開先部２２下面にガラステープ３５と耐熱テープ３８と特殊ガラステープ３９をミシン糸で縫い合わせたシート状の耐火部材３７を、両面接着テープで接着することにより、開先部２２の裏面に密着させて片面から主にマグ溶接を行うものである。 Further, as shown in FIGS. 6A and 6B, there is a single-side welding method in which a sheet-like refractory member 37 is bonded to the back surface and mag welding is performed. In FIG. 6A, a sheet-like refractory member 37 in which a glass tape 35, a solid flux 36, and a refractory material are bonded to the bottom surface of the groove portion 22 of the flat plates 21A and 21A that are abutted together is bonded with a double-sided adhesive tape 34. The mag welding is mainly performed from one side while being in close contact with the back surface of the groove portion 22. FIG. 6B shows a sheet-like fire-resistant member 37 in which a glass tape 35, a heat-resistant tape 38, and a special glass tape 39 are sewn together with a sewing thread on the bottom surface of the groove portion 22 of the flat plates 21A and 21A that are butted together, using a double-sided adhesive tape. By adhering, it is brought into close contact with the back surface of the groove portion 22, and mag welding is mainly performed from one side.
さらにまた、図７（ａ）（ｂ）に示すように、分割された耐火材又は固形部材を開先部の裏面に接着させてサブマージアーク溶接あるいはマグ溶接を行う片面溶接法があった。図７（ａ）は、銅裏当て４２と耐火物４３とからなる分割された固形部材を、剥離紙４０を剥がして接着剤付きアルミテープ４１により、開先部２２の裏面に密着させて片面からサブマージあるいはマグ溶接を行うものである。図７（ｂ）は、柔軟性のあるガラステープ４４と分割された耐火物４５を、剥離紙４０を剥がして接着剤付きアルミテープ４１により、開先部２２の裏面に密着させて片面からサブマージあるいはマグ溶接を行うものである。 Furthermore, as shown in FIGS. 7 (a) and 7 (b), there has been a single-side welding method in which a divided refractory material or a solid member is adhered to the back surface of the groove portion to perform submerged arc welding or mag welding. FIG. 7A shows one side of a solid member made of a copper backing 42 and a refractory 43, which is peeled off from the release paper 40 and adhered to the back surface of the groove portion 22 with an aluminum tape 41 with adhesive. Submerging or mag welding. FIG. 7B shows a flexible glass tape 44 and a divided refractory 45 that are peeled off the release paper 40 and adhered to the back surface of the groove portion 22 with an adhesive aluminum tape 41 and submerged from one side. Alternatively, mag welding is performed.
図４（ａ）に示すように、門型のストロンバック２４と銅裏当て２３の間にクサビ状の角矢２５を打ち込んで、銅裏当て２３を平板２１Ａ，２１Ｂの下面に密着させる従来一般の溶接用銅裏当ては、溶接熱の影響や溶接で発生する変形応力によって鋼板裏面と銅裏当ての間に隙間が生じることがあった。この隙間を生じないようにするために、門型のストロンバック２４の設置数量を増して間隔を狭めたり、角矢２５の打ち込み量を増したりすることが必要となり、ストロンバック２４の溶着跡を健全に処理する手間が生じた。また、図４（ｂ）に示すように、門型のストロンバック２４の内側に固定した断面コ状のチャンネル材のケース２６を、複数の支持ボルト２７と押えボルト２８によって銅裏当て２３を押さえつけて密着性をさらに向上させた方法は、これらの治具の製作、取付けに手数がかかり、いちいち押えボルト２８によって銅裏当て２３を押さえ密着させるために締め付け作業が大変であった。 As shown in FIG. 4 (a), a conventional wedge-shaped square arrow 25 is driven between the portal-type Stronback 24 and the copper backing 23 to bring the copper backing 23 into close contact with the lower surfaces of the flat plates 21A and 21B. The copper backing for welding sometimes has a gap between the back surface of the steel plate and the copper backing due to the influence of welding heat or deformation stress generated by welding. In order to prevent this gap from occurring, it is necessary to increase the number of installations of the portal-type stronback 24 to reduce the interval or increase the driving amount of the square arrow 25. It took time to process. Further, as shown in FIG. 4 (b), a case 26 of a channel material having a U-shaped cross section fixed to the inside of a gate-shaped stronback 24 is pressed against a copper backing 23 by a plurality of support bolts 27 and presser bolts 28. In the method of further improving the adhesion, it takes time to manufacture and attach these jigs, and tightening work is difficult because the copper backing 23 is pressed and adhered by the presser bolt 28.
特開平１１−１５６５９０号公報の「溶接用裏当て」は、両面溶接する際に開先内部を埋めて保護する場合には適用することができるが、平板の銅裏当てを用いて片側から溶接する場合には採用することができなかった。また、上記と同様に門型のストロンバックを溶着し銅裏当ての間に角矢を打ち込むため、隙間が生じないようにするためにストロンバックの設置数量を増し、角矢の打ち込み量を増す作業が必要となり、ストロンバックの溶着跡を健全に処理する手間も生じた。 Japanese Patent Laid-Open No. 11-156590 “Welding backing” can be applied when filling the inside of the groove for protection when performing double-sided welding, but welding from one side using a flat copper backing. It was not possible to adopt it. Also, as in the above, a gate-shaped stronback is welded and a square arrow is driven between the copper backings. This necessitates a troublesome treatment of the Stronbuck weld mark.
図５（ａ）に示すように、開先部２２下面に裏フラックス２９Ｂを敷き、その下部を銅裏当て２３で支えエアーホース３０で押上げる方法は、サブマージアーク溶接に適用するものであって、銅裏当て２３と裏フラックス２９Ｂをエアーホース３０で押上げているが、初層ティグ溶接を適用する場合には裏フラックス２９Ｂが溶接に悪影響を与えるため採用することができなかった。また、図５（ｂ）に示すように、開先部２２の下面に桶型の裏当て治具３１を設置し、下敷きフラックスを入れた裏当２３と裏フラックス２９Ｂを入れ、その下方に配置したエアーホース３３を膨張させて裏フラックス２９Ｂを押し当てる方法は、サブマージアーク溶接に適用するものであって、裏当２３とエアーホース３３で裏フラックス２９Ｂを押上げているが、上記と同様に、初層ティグ溶接を適用する場合には裏フラックス２９Ｂが溶接に悪影響を与えるため採用することはできなかった。また、フラックス２９の消耗があり、さらに裏当て治具３１の設置と調整に手間を必要とした。 As shown in FIG. 5A, the method of laying a back flux 29B on the lower surface of the groove portion 22 and supporting the lower portion with a copper backing 23 with an air hose 30 is applied to submerged arc welding. The copper backing 23 and the back flux 29B are pushed up by the air hose 30. However, when the first layer TIG welding is applied, the back flux 29B has an adverse effect on the welding and cannot be employed. Further, as shown in FIG. 5 (b), a saddle-shaped backing jig 31 is installed on the lower surface of the groove portion 22, and a backing 23 and a backing flux 29B into which an underlay flux is placed are placed and arranged below that. The method of inflating the air hose 33 and pressing the back flux 29B is applied to submerged arc welding, and the back flux 29B is pushed up by the back 23 and the air hose 33. When the first layer TIG welding is applied, the back flux 29B has an adverse effect on the welding and cannot be employed. Further, the flux 29 is consumed, and it takes time and effort to install and adjust the backing jig 31.
図６（ａ）に示すように、開先部２２下面にガラステープ３５と固形フラックス３６と耐火材を張り合わせたシート状の耐火部材３７を、両面接着テープ３４で接着する方法は、ガラステープ３５が溶接に悪影響を与える心配があり、さらに大きな平板の裏面に人が入って作業をしなければならないため、設置が困難で手間がかかるなどの問題もあった。また、図６（ｂ）に示すように、開先部２２下面にガラステープ３５と耐熱テープ３８と特殊ガラステープ３９をミシン糸で縫い合わせたシート状の耐火部材３７を、両面接着テープ３４で接着する方法は、上記と同様に、ガラステープ３５が溶接に悪影響を与える心配と、大きな平板の裏面に人が入る作業性の問題があった。また、上記のようにガラステープ３５などを両面接着テープ３４で接着する方法は、強度が不十分であり損傷や剥がれを生じる心配があった。 As shown in FIG. 6A, a method of adhering a sheet-like refractory member 37 in which a glass tape 35, a solid flux 36 and a refractory material are bonded to the lower surface of the groove portion 22 with a double-sided adhesive tape 34 is the glass tape 35 However, there is also a problem that the installation is difficult and time-consuming because there is a concern that the welding may have an adverse effect on welding, and a person has to work on the back of a larger flat plate. Further, as shown in FIG. 6B, a sheet-like refractory member 37 in which a glass tape 35, a heat-resistant tape 38, and a special glass tape 39 are sewn with a sewing thread on the lower surface of the groove portion 22 is bonded with a double-sided adhesive tape 34. In the same way as described above, there are concerns that the glass tape 35 adversely affects welding and the problem of workability that allows a person to enter the back of a large flat plate. Further, the method of adhering the glass tape 35 or the like with the double-sided adhesive tape 34 as described above has insufficient strength and may cause damage or peeling.
図７（ａ）に示すように、銅裏当て４２と耐火物４３とからなる分割された固形部材を、剥離紙４０を剥がして接着剤付きアルミテープ４１によって密着させる方法は、接着剤付きアルミテープ４１が溶接に悪影響を与える心配があり、大きな平板の裏面に人が入って作業をしなければならないため、設置が困難で手間がかかるなどの問題があった。また、図７（ｂ）に示すように、柔軟性のあるガラステープ４４と分割された耐火物４５を、剥離紙４０を剥がして接着剤付きアルミテープ４１によって密着させる方法は、上記と同様に、接着剤付きアルミテープ４１が溶接に悪影響を与える心配と平板の裏面での作業性の問題があった。また、上記のテープ状部材は、製作及び保管、運搬時の取扱いに、剥れないようにする配慮を必要とした。 As shown in FIG. 7 (a), the divided solid member made of the copper backing 42 and the refractory 43 is peeled off the release paper 40 and adhered by an aluminum tape 41 with an adhesive. There is a concern that the tape 41 may adversely affect welding, and there is a problem that installation is difficult and time-consuming because a person has to work on the back of a large flat plate. Moreover, as shown in FIG.7 (b), the method of peeling the release paper 40 and making the refractory material 45 divided | segmented with the flexible glass tape 44 adhere | attached with the aluminum tape 41 with an adhesive is the same as the above. There was a problem that the aluminum tape 41 with adhesive adversely affects welding and workability on the back surface of the flat plate. In addition, the tape-shaped member described above requires consideration to prevent it from peeling off during production, storage, and handling during transportation.
この発明の目的は、上述のような従来技術が有する問題点に鑑みてなされたもので、簡単な構造の治具を用いて銅裏当ての密着性を保ち、裏波形状が滑らかで、はみ出しや割れなどの欠陥が生ない突合せ溶接方法を提供するものである。 The object of the present invention has been made in view of the above-mentioned problems of the prior art, and the adhesion of the copper backing is maintained using a jig with a simple structure, the back wave shape is smooth, and the protrusion The present invention provides a butt welding method in which defects such as cracks and cracks do not occur.
請求項１に係る発明の突合せ溶接方法は、ティグ溶接を行う平板１（１Ａ、１Ｂ）相互の開先部２を突き合わせて、定盤３上に配置し、該平板１（１Ａ、１Ｂ）の下部、定盤３上の所定位置にはライナ６（６Ａ、６Ｂ）を配置し、該平板１（１Ａ、１Ｂ）は開先部２の両端位置を押さえ治具７で固定し、該開先部２の下部には銅裏当て５を敷き、該銅裏当て５下部と定盤３との間には、ステンレスの薄い板を用いてその周縁端部を溶着して膨張可能な袋状に形成しその内部へ圧力ガスを送入するガス入口ノズルを設けてなる袋体４を設け、前記平板１（１Ａ、１Ｂ）上面の開先部２の近くに、溶接熱による平板１（１Ａ、１Ｂ）の浮き上がりを上方から押さえるためのウエイト９を載置し、上記袋体４の内部へガス圧力０．１〜０．５ＭＰａ程度の不活性ガスを圧入して膨張させることにより上記銅裏当て５を押し上げて開先部２裏面に密着させるとともに、上記ウエイト９の上からの押え付けで挟み付けて溶接を行う。
In the butt welding method of the invention according to claim 1, the groove portions 2 of the flat plates 1 (1A, 1B) to be subjected to TIG welding are butted against each other and arranged on the surface plate 3, and the flat plate 1 (1A, 1B) The liner 6 (6A, 6B) is disposed at a predetermined position on the lower portion of the surface plate 3, and the flat plate 1 (1A, 1B) is fixed to the both ends of the groove portion 2 by pressing jigs 7, and the groove A copper backing 5 is laid on the lower part of the part 2, and a peripheral stainless steel thin plate is used between the copper backing 5 lower part and the surface plate 3 to weld the peripheral edge thereof into an inflatable bag shape. A bag body 4 provided with a gas inlet nozzle for forming and feeding pressure gas into the inside thereof is provided, and a flat plate 1 (1A, 1A, placing a weight 9 for pressing the lifting of 1B) from above, the gas pressure 0.1~0.5MPa into the interior of the receptacle 4 With pushing up the copper backing 5 is brought into close contact with the groove portion 2 back surface by inflating by press-fitting the time the inert gas performs a welding clamped by pressing with from the top of the weight 9.
請求項１に係る発明の突合せ溶接方法は、ティグ溶接を行う平板１（１Ａ、１Ｂ）相互の開先部２を突き合わせて、定盤３上に配置し、該平板１（１Ａ、１Ｂ）の下部、定盤３上の所定位置にはライナ６（６Ａ、６Ｂ）を配置し、該平板１（１Ａ、１Ｂ）は開先部２の両端位置を押さえ治具７で固定し、該開先部２の下部には銅裏当て５を敷き、該銅裏当て５下部と定盤３との間には、ステンレスの薄い板を用いてその周縁端部を溶着して膨張可能な袋状に形成しその内部へ圧力ガスを送入するガス入口ノズルを設けてなる袋体４を設け、前記平板１（１Ａ、１Ｂ）上面の開先部２の近くに、溶接熱による平板１（１Ａ、１Ｂ）の浮き上がりを上方から押さえるためのウエイト９を載置し、上記袋体４の内部へガス圧力０．１〜０．５ＭＰa程度の不活性ガスを圧入して膨張させることにより上記銅裏当て５を押し上げて開先部２裏面に密着させるとともに、上記ウエイト９の上からの押え付けで挟み付けて溶接を行うので、上記袋体４の内部へ窒素、アルゴンなどの安全な不活性ガスを使用し、圧力調整器を使用してガス圧力を０．１〜０．５ＭＰa内の適度に調整して密着性を良くすることにより、上記袋体４は銅裏当て５を押し上げて開先部２の裏面に密着させ、平板１（１Ａ、１Ｂ）の上にウエイト９を載置するので上からの押え付けで溶接熱による浮き上がりを押えることができる結果、袋体４とウエイト９による挟み付けが相俟って、開先部２と銅裏当て５の密着性が向上し隙間が生じることがなく、溶接金属のはみ出しがなく裏波形状が滑らかで形状不良の発生がなく、溶接部に割れなどの欠陥が生じなく、良好な裏波の溶接部が得られる。そのため、従来のような裏波の整形研削を必要とすることがなくなり、多大な手間と負担を必要とすることがない。また、袋体４は簡単な部材で製作することができ、袋体４及び銅裏当て５の設置は作業性良く簡単にでき、圧力設定と調整も簡単にできる。
In the butt welding method of the invention according to claim 1, the groove portions 2 of the flat plates 1 (1A, 1B) to be subjected to TIG welding are butted against each other and arranged on the surface plate 3, and the flat plate 1 (1A, 1B) The liner 6 (6A, 6B) is disposed at a predetermined position on the lower portion of the surface plate 3, and the flat plate 1 (1A, 1B) is fixed to the both ends of the groove portion 2 by pressing jigs 7, and the groove A copper backing 5 is laid on the lower part of the part 2, and a peripheral stainless steel thin plate is used between the copper backing 5 lower part and the surface plate 3 to weld the peripheral edge thereof into an inflatable bag shape. A bag body 4 provided with a gas inlet nozzle for forming and feeding pressure gas into the inside thereof is provided, and a flat plate 1 (1A, 1A, 1B) A weight 9 for holding the float from above is placed, and a gas pressure of 0.1 to 0.5 MPa is introduced into the bag body 4. As the above-mentioned copper backing 5 is pushed up and inflated by injecting and inflating an inert gas of the degree, and welding is carried out by being clamped by pressing from above the weight 9, the above-mentioned Use a safe inert gas such as nitrogen or argon for the inside of the bag body 4 and adjust the gas pressure appropriately within 0.1 to 0.5 MPa using a pressure regulator to improve adhesion. Thus, the bag body 4 pushes up the copper backing 5 to be in close contact with the back surface of the groove portion 2, and the weight 9 is placed on the flat plate 1 (1A, 1B). As a result of being able to suppress the lifting, the bag 4 and the weight 9 are combined and the adhesion between the groove portion 2 and the copper backing 5 is improved, so that no gap is produced, and the weld metal protrudes. The back wave shape is smooth and there is no shape defect. Defects such as cracks do not occur in the welded portion, and a good welded portion of the back wave is obtained. This eliminates the need for back-shaping shaping grinding as in the prior art, and does not require much effort and burden. Moreover, the bag body 4 can be manufactured with a simple member, the installation of the bag body 4 and the copper backing 5 can be easily performed with good workability, and the pressure setting and adjustment can be easily performed.
この発明に係る突合せ溶接方法を、図１及び図２に基づいて説明する。 図１は、この発明に係る突合せ溶接方法の実施形態例で（ａ）平面図（ｂ）縦断面図である。 平面図（ａ）に示すように、ティグ溶接を行うアニュラ板などの平板１（１Ａ、１Ｂ）相互の開先部２を突き合わせて、定盤３上に配置する。開先部２の両端位置を押さえ治具７で固定し、平板１上にウエイト９を載置する。 縦断面図（ｂ）に示すように、平板１（１Ａ、１Ｂ）の下部、定盤３上の所定位置にライナ６（６Ａ、６Ｂ）を配置する。
また、開先部２の下部には銅裏当て５を敷き、この銅裏当て５の下部に袋体４を設ける。 この袋体４はステンレスなどの薄い板を用いて、その周縁端部を溶着して膨張可能な袋状に形成し、その内部へ圧力ガスを送入することができるようにガス入口ノズル１０を側面近傍に設ける。
A butt welding method according to the present invention will be described with reference to FIGS. 1A and 1B are (a) a plan view and (b) a longitudinal sectional view of an embodiment of a butt welding method according to the present invention. As shown in the plan view (a), the groove portions 2 of the flat plates 1 (1A, 1B) such as an annular plate to be subjected to TIG welding are abutted and arranged on the surface plate 3. Both end positions of the groove portion 2 are fixed by the holding jig 7, and the weight 9 is placed on the flat plate 1. As shown in the longitudinal sectional view (b), the liner 6 (6A, 6B) is disposed at a predetermined position on the surface plate 3 below the flat plate 1 (1A, 1B).
Further, a copper backing 5 is laid on the lower portion of the groove portion 2, and a bag body 4 is provided on the lower portion of the copper backing 5. The bag body 4 is made of a thin plate such as stainless steel, and its peripheral edge is welded to form an inflatable bag shape. The gas inlet nozzle 10 is provided so that pressure gas can be fed into the bag body 4. Provide near the side.
上記平板１（１Ａ、１Ｂ）を配置する手順を、（１）〜（３）に沿って説明する。（１）定盤３上の所定位置、つまり配置する平板１の開先部２に相当する位置に、袋体４を配置しその上に銅製などの銅裏当て５を載せる。この位置から離れて平板１の荷重を平均に支持する適当な位置に、ライナ６Ａ、６Ｂを配置する。このライナ６は上部の平板１に逆ひずみをつけるため、外側に位置するライナ６Ｂの厚さを大きくする。（２）平板１（１Ａ、１Ｂ）を定盤３上に静置する。この際に銅裏当て５上の開先部２の所定間隔を確保する。 平板１（１Ａ、１Ｂ）を定盤３上に押さえ付け固定するための押さえ治具７を、開先部２両端位置の定盤３上に溶接で取付ける。この押さえ治具７にクサビ状の角矢８を打ち込んで平板１（１Ａ、１Ｂ）を定盤３上に押さえ付け固定する。（３）平板１（１Ａ、１Ｂ）上部に、押え部材のウエイト９を載せる。 The procedure for arranging the flat plate 1 (1A, 1B) will be described along (1) to (3). (1) A bag body 4 is placed at a predetermined position on the surface plate 3, that is, a position corresponding to the groove portion 2 of the flat plate 1 to be placed, and a copper backing 5 made of copper or the like is placed thereon. The liners 6 </ b> A and 6 </ b> B are arranged at appropriate positions apart from this position to support the load of the flat plate 1 on average. Since this liner 6 applies reverse strain to the upper flat plate 1, the thickness of the liner 6B located outside is increased. (2) The flat plate 1 (1A, 1B) is placed on the surface plate 3. At this time, a predetermined interval of the groove portion 2 on the copper backing 5 is secured. A pressing jig 7 for pressing and fixing the flat plate 1 (1A, 1B) on the surface plate 3 is attached to the surface plate 3 at both ends of the groove portion 2 by welding. A wedge-shaped square arrow 8 is driven into the holding jig 7 to press and fix the flat plate 1 (1A, 1B) on the surface plate 3. (3) The weight 9 of the pressing member is placed on the flat plate 1 (1A, 1B).
図２に開先部２の近傍を拡大して示し、上記（１）〜（３）に続く作業手順を説明する。銅裏当て５の下部の袋体４は、設置時には破線に示すように萎んだ状態で、ガス入口ノズル１０からガスを圧入することによって、溶接時には実線に示すように膨張させる。膨張した袋体４は、銅裏当て５を押し上げて開先部２の裏面に密着させる。 この際の圧入ガスは、窒素、アルゴンなどの安全な不活性ガスを使用し、圧力調整器を使用してガス圧力を０．１〜０．５Ｍｐａ程度に調整して密着性を良くする。 FIG. 2 shows the vicinity of the groove portion 2 in an enlarged manner, and the work procedure following the above (1) to (3) will be described. The bag body 4 below the copper backing 5 is inflated as shown by a solid line during welding by press-fitting gas from the gas inlet nozzle 10 in a deflated state as shown by a broken line during installation. The inflated bag body 4 pushes up the copper backing 5 and is brought into close contact with the back surface of the groove portion 2. At this time, the injection gas is a safe inert gas such as nitrogen or argon, and the pressure is adjusted to adjust the gas pressure to about 0.1 to 0.5 Mpa to improve the adhesion.
開先部２の上方から初層テイグ溶接を開始する。溶接熱でアニュラ板が定盤３より僅かに浮いても、加圧した袋体４もその形状に追従して変形し、銅裏当て５を平板１裏面形状に追従して弾性変形する。 また、図１に示したように平板１の上に載置したウエイト９が、溶接熱による平板１の浮き上がりを上方から押えるため、袋体４とウエイト９による上下からの挟み付けが相俟って、開先部２と銅裏当て５の密着性が向上し隙間が生じることがない。 First layer TIG welding is started from above the groove portion 2. Even if the annular plate floats slightly from the surface plate 3 due to welding heat, the pressurized bag body 4 also deforms following the shape, and the copper backing 5 elastically deforms following the shape of the back surface of the flat plate 1. Further, as shown in FIG. 1, the weight 9 placed on the flat plate 1 presses the floating of the flat plate 1 due to welding heat from above, so that the bag 4 and the weight 9 are sandwiched from above and below. Thus, the adhesion between the groove portion 2 and the copper backing 5 is improved, and no gap is generated.
このように、溶接熱の影響で平板１の裏面形状が変化した場合に、銅裏当て５が追従し変形して密着することにより、溶接金属のはみ出しがなくなり形状不良の発生がなく、滑らかで良好な溶接部が得られる。よって、従来のような裏波の整形研削をする必要がなくなり、多大な手間と負担を要することがない。さらに、従来のような門型のストロンバックの設置と角矢の打込みが不要となり、このストロンバックの溶着跡を処理する手間もなくなる。 In this way, when the back surface shape of the flat plate 1 changes due to the influence of welding heat, the copper backing 5 follows and deforms and adheres, so that the weld metal does not stick out and the shape defect does not occur and is smooth. A good weld can be obtained. Therefore, there is no need to perform shaping grinding of the back wave as in the prior art, and no great effort and burden are required. Further, it is not necessary to install a portal-type Stronbuck and to insert a square arrow as in the prior art, and it is not necessary to process the Stronbuck welding trace.
図３の縦断面図に実施例の試験実施状態を示し、表に試験結果を示す。図３に示すように、定盤３上に袋体４を置き、この袋体４の上に銅裏当て５を配置する。袋体４に設けたガス入口ノズル１０からガスを圧入し、開先部に相当する距離を置いた支持点１１，１１で固定し、その中央部の変位をダイヤルゲージ１２によって測定する。 The longitudinal sectional view of FIG. 3 shows the test implementation state of the example, and the table shows the test result. As shown in FIG. 3, the bag body 4 is placed on the surface plate 3, and the copper backing 5 is disposed on the bag body 4. A gas is press-fitted from a gas inlet nozzle 10 provided in the bag body 4, fixed at support points 11, 11 at a distance corresponding to the groove portion, and a displacement at the center is measured by a dial gauge 12.
試験結果の表に示すように、押え治具となる袋体内部の圧力を０．１Ｍｐａ（メガパスカル）から増加させるのに従って、銅裏当ての弾性変形が生じて中央部が浮上し、上方に位置する開先部への密着性が向上することが判明した。試験圧力範囲０．１〜０．５Ｍｐａで、残留変形が１ミリメートル程度以下、弾性変形４ミリメートル程度、浮上り寸法５ミリメートル程度と適当な変化量が得られるため、実用に適することが判った。この押え治具となる袋体を、溶接開先部の銅裏当て裏面へ設置し内圧をかけ膨張させて密着性の向上を図ることによって、開先部裏面への溶接金属のはみだしが防止され、滑らかで健全な溶接部が得られることになる。 As shown in the table of test results, as the pressure inside the bag, which is the holding jig, is increased from 0.1 Mpa (megapascal), the elastic deformation of the copper backing occurs and the center part rises upward. It has been found that the adhesion to the groove portion is improved. In the test pressure range of 0.1 to 0.5 Mpa, it was found that the residual deformation was about 1 millimeter or less, the elastic deformation was about 4 millimeters, and the floating dimension was about 5 millimeters. By installing the bag body, which is the holding jig, on the back side of the copper backing of the weld groove and expanding it by applying internal pressure to prevent adhesion of the weld metal to the back of the groove. A smooth and sound weld is obtained.
この発明に係る突合せ溶接方法は、簡単な構造の治具を用いて銅裏当ての密着性を保ち、裏波形状が滑らかで、はみ出しや割れなどの欠陥が生ないため、平板を突合せて溶接する貯槽、箱体、壁面の被覆体など、広い分野の突合せ溶接方法に適用することができる。 The butt welding method according to the present invention uses a jig with a simple structure to maintain the adhesiveness of the copper backing, the back surface shape is smooth, and there are no defects such as protrusions and cracks. It can be applied to butt welding methods in a wide range of fields such as storage tanks, boxes, and wall coverings.
１，１Ａ，１Ｂ平板
２開先部
３定盤
４袋体
５銅裏当て
６，６Ａ，６Ｂライナ
７押さえ治具
８角矢
９ウエイト
１０ガス入口ノズル
１１支持点
１２ダイヤルゲージ
２１，２１Ａ，２１Ｂ平板
２２開先部
２３銅裏当て
２４ストロンバック
２５角矢
２６ケース
２７支持ボルト
２８押えボルト
２９，２９Ａ，２９Ｂフラックス
３０エアーホース
３１裏当て治具
３２袋
３３エアーホース
３４両面接着テープ
３５ガラステープ
３６固形フラックス
３７耐火部材
３８耐熱テープ
３９特殊ガラステープ
４０剥離紙
４１接着剤付きアルミテープ
４２銅裏当て
４３耐火物
４４ガラステープ
４５耐火物
1,1A, 1B flat plate
2 groove part
3 surface plate
4 bags
5 copper backing
6,6A, 6B liner
7 holding jig
Octagon arrow
9 weights
10 gas inlet nozzle
11 support points
12 dial gauge
21, 21A, 21B flat plate
22 groove part
23 copper backing
24 strong back
25 square arrows
26 cases
27 Support bolt
28 presser bolt
29, 29A, 29B flux
30 air hose
31 backing jig
32 bags
33 air hose
34 double-sided adhesive tape
35 glass tape
36 solid flux
37 refractory members
38 heat resistant tape
39 special glass tape
40 release paper
41 Aluminum tape with adhesive
42 copper backing
43 refractories
44 glass tape
45 refractories
Claims (1)
The groove portions 2 of the flat plates 1 (1A, 1B) to be subjected to TIG welding are brought into contact with each other and arranged on the surface plate 3, and the liner is placed at a predetermined position on the surface of the lower portion of the flat plate 1 (1A, 1B). 6 (6A, 6B) are arranged, and the flat plate 1 (1A, 1B) is fixed with the holding jig 7 at both ends of the groove portion 2, and a copper backing 5 is laid on the lower portion of the groove portion 2. Gas between the lower part of the copper backing 5 and the surface plate 3 is formed of a stainless steel thin plate and its peripheral edge is welded to form an inflatable bag, and pressure gas is fed into the bag. A bag body 4 provided with an inlet nozzle is provided, and a weight 9 is provided near the groove portion 2 on the upper surface of the flat plate 1 (1A, 1B) to suppress the floating of the flat plate 1 (1A, 1B) due to welding heat from above. was placed, this inflate by injecting an inert gas around the gas pressure 0.1~0.5Mpa into the interior of the receptacle 4 The copper backing 5 is pushed up together is brought into close contact with the groove portion 2 backside, butt welding method and performing welding clamped by pressing with from the top of the weight 9 by.
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|---|---|---|---|
| JP2005313934A JP4899119B2 (en) | 2005-10-28 | 2005-10-28 | Butt welding method |
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| JP4899119B2 true JP4899119B2 (en) | 2012-03-21 |
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| CN110860843B (en) * | 2019-12-04 | 2021-04-30 | 广西桂盾人防工程有限公司 | Positioning fixture for combined splicing of galvanized steel sheets and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2444069A1 (en) * | 1978-12-15 | 1980-07-11 | Thomson Csf | METHOD FOR BONDING TWO ELEMENTS USING A PHOTOPOLYMERIZABLE SUBSTANCE AND DEVICES COMPRISING TWO ELEMENTS JOINED BY A PHOTOPOLYMERIZABLE INTERMEDIATE LAYER |
| JPS60111796A (en) * | 1983-11-22 | 1985-06-18 | Ishikawajima Harima Heavy Ind Co Ltd | Device for supporting steel plate block at welding operation |
| JPS62234662A (en) * | 1986-04-03 | 1987-10-14 | Nippon Kokan Kk <Nkk> | One face welding method |
| JP3539886B2 (en) * | 1999-04-05 | 2004-07-07 | 株式会社神戸製鋼所 | Single side welding equipment |
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