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WO2019000112A1 - Procédé d'optimisation de processus de soudage à l'arc en atmosphère d'argon de tuyau en alliage d'aluminium - Google Patents

Procédé d'optimisation de processus de soudage à l'arc en atmosphère d'argon de tuyau en alliage d'aluminium Download PDF

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Publication number
WO2019000112A1
WO2019000112A1 PCT/CN2017/000402 CN2017000402W WO2019000112A1 WO 2019000112 A1 WO2019000112 A1 WO 2019000112A1 CN 2017000402 W CN2017000402 W CN 2017000402W WO 2019000112 A1 WO2019000112 A1 WO 2019000112A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
aluminum alloy
welding process
weld
argon arc
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2017/000402
Other languages
English (en)
Chinese (zh)
Inventor
张彬
庞继勇
陈雅斌
郭利伟
毛春生
陈丽刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEPCO1 Electric Power Construction Co Ltd
Original Assignee
SEPCO1 Electric Power Construction Co Ltd
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.)
Filing date
Publication date
Application filed by SEPCO1 Electric Power Construction Co Ltd filed Critical SEPCO1 Electric Power Construction Co Ltd
Priority to PCT/CN2017/000402 priority Critical patent/WO2019000112A1/fr
Publication of WO2019000112A1 publication Critical patent/WO2019000112A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
    • 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
    • B23K9/235—Preliminary treatment

Definitions

  • the invention relates to an optimization method for an argon arc welding process of an aluminum alloy tube.
  • the angle of the traditional specimen bevel processing is generally 30°, the welding angle is small under the butt joint, and the root is not welded and the defects are easily penetrated.
  • the bevel or the steel grinding head is used to polish the groove, so that the bevel edge exists.
  • the burr is easy to damage the edge of the inner slope, resulting in defects such as pores and burn through during welding.
  • the quality of the welded joints is slow to increase, the time and energy spent by the operators are long, the cost of materials and machinery is high, and the long-term training is due to the strong light and strong ultraviolet radiation during welding of the aluminum alloy.
  • the operator's physical and mental health causes damage.
  • the present invention proposes an optimization method for an argon arc welding process of an aluminum alloy tube, and the present invention provides a welding effect by setting a targeted welding method for several key technical points in the welding. Optimization, at the same time, can establish a unified evaluation criteria, a reasonable evaluation of the operator's level, can be applied to the welding skills competition project.
  • An optimization method for an argon arc welding process of an aluminum alloy tube comprising the following steps:
  • the test piece is polished by a super-hard tungsten steel circular saw blade for aluminum alloy, and the groove angle is 35° by the weld inspection rule inspection, and the inner groove edge is polished. Do not repair, keep it straight.
  • the surface of the test piece has a surface of 40-60 mm on both sides of the bevel, and the surface is polished with a steel grinding head to expose the metallic luster.
  • the prepared test piece must be welded within 1.5-2.5 hours, otherwise the grinding is repeated. preparation.
  • the purity of the argon gas is not less than 99.99%, the water content is not more than 50 mg/m 3 , the gas flow rate is 15-20 L/min, and the ambient temperature is not lower than 5 ° C, otherwise preheating to 100- After 200 ° C, apply welding.
  • the welding current is 150-160A
  • the cleaning ratio is [-20, -15]
  • the AC bias value is 120; when welding, the welding gun is at an angle of 90° with the test piece, and cannot be tilted back and forth.
  • the extension length of the tungsten electrode is [2, 4] mm, and the welding wire is at an angle of 50°-70° with the weld seam.
  • step (4) during the welding process, the solder joints to be solidified are to be ground, and the root of the groove is not worn.
  • step (4) if it is found that there is a pore, immediately stop the welding, perform the grinding treatment, and check whether the root of the weld is not fused.
  • the super-hard tungsten steel circular saw blade is used to grind the front arc-extinguishing point out of the slope, and when the arc starts, the arc is to be arced behind the slope to form a molten pool. Add the welding wire for welding. At the end of the arc collection, the first arcing point should be polished out of the slope and slowly arced.
  • the welding current is set to 140-150 A, the cleaning ratio is [-20, -5], and the AC bias value is 120.
  • the welding wire is applied at an angle of a shear line with the weld circle, and the welding gun is oscillated by a circular swing method, and the joint of the weld is made of tungsten.
  • the steel circular saw blade is ground to ensure the height difference of the joint.
  • the original weld seam should not be damaged when grinding.
  • the first arcing point should be polished out of the slope and slowly arced.
  • the invention adopts a super-hard tungsten steel circular saw blade for aluminum alloy to grind the groove, and has no burrs and notches on the edge of the groove to avoid defects such as pores and burn through when welding; the groove angle is 35°, and the test piece is solved.
  • the angle of the groove is too small, which may cause defects such as insufficient penetration of the root.
  • the invention guides the operator's operation method throughout the welding process, so that each operator is easy to palm
  • the welding skill of holding a uniform aluminum alloy tube ensures the appearance quality and internal quality of the welded joint.
  • the present application proposes an optimization method for an argon arc welding process of an aluminum alloy tube, comprising the following steps:
  • the test piece is polished by a super-hard tungsten steel circular saw blade for aluminum alloy, and the groove angle is 35° by the weld inspection rule inspection, and the inner groove edge is polished. Do not repair, keep it straight.
  • the surface of the test piece has a surface of 40-60 mm on both sides of the bevel, and the surface is polished with a steel grinding head to expose the metallic luster.
  • the prepared test piece must be welded within 1.5-2.5 hours, otherwise the grinding is repeated. preparation.
  • the purity of the argon gas is not less than 99.99%, the water content is not more than 50 mg/m 3 , the gas flow rate is 15-20 L/min, and the ambient temperature is not lower than 5 ° C, otherwise preheating to 100- After 200 ° C, apply welding.
  • the welding current is 150-160A
  • the cleaning ratio is [-20, -15]
  • the AC bias value is 120; when welding, the welding gun is at an angle of 90° with the test piece, and cannot be tilted back and forth.
  • the extension length of the tungsten electrode is [2, 4] mm, and the welding wire is at an angle of 50°-70° with the weld seam.
  • step (4) during the welding process, the solder joints to be solidified are to be ground, and the root of the groove is not worn.
  • step (4) if it is found that there is a pore, the welding is immediately stopped, the grinding treatment is performed, and the inspection is performed. Check if the root of the weld is not fused.
  • the super-hard tungsten steel circular saw blade is used to grind the front arc-extinguishing point out of the slope, and when the arc starts, the arc is to be arced behind the slope to form a molten pool. Add the welding wire for welding. At the end of the arc collection, the first arcing point should be polished out of the slope and slowly arced.
  • the welding current is set to 140-150 A, the cleaning ratio is [-20, -5], and the AC bias value is 120.
  • the welding wire is applied at an angle of a shear line with the weld circle, and the welding gun is oscillated by a circular swing method, and the joint of the weld is made of tungsten.
  • the steel circular saw blade is ground to ensure the height difference of the joint.
  • the original weld seam should not be damaged when grinding.
  • the first arcing point should be polished out of the slope and slowly arced.
  • the invention is used in competitions, the main equipment and materials required, and the welding method:
  • Welding equipment AC/DC square wave aluminum welding machine
  • Aluminum alloy tube specifications ⁇ 80 ⁇ 5mm, material: 5A06 aluminum-magnesium alloy;
  • Aluminum welding wire specification 2.4mm, 3.2mm, model: SAl5356;
  • Welding method AC tungsten argon arc welding
  • Welding position vertical fixed group pair welding
  • the test piece processed by the lathe is made of aluminum alloy special super-hard tungsten steel circular saw blade, and the groove is polished.
  • the angle of the groove is 35°, and the inner edge of the groove is observed during the grinding. Do not repair and keep it straight.
  • This processing method does not generate burrs at the groove, which can reduce the generation of air holes during welding.
  • the surface of the 50mm side of the bevel of the test piece is polished with a steel grinding head to expose the metallic luster.
  • the prepared test piece must be welded within 2 hours, otherwise it will be re-grinded, because aluminum It is easy to oxidize in the air to produce a dense oxide film. If it is not treated, it will cause pore defects during welding.
  • test piece is vertically aligned on the station frame to see if there is a gap. If there is a gap that will cause burn-through defects, use a trowel to level the force slightly through the edge of the inner groove. The burrs that appear after grinding should be cleaned up, and as far as possible, no blunt edges will occur. Otherwise, the thick blunt edges will affect the bottom welding. Causes no penetration.
  • the wire used is polished with a steel ball to ensure that the surface of the wire is polished.
  • the cleaned wire is placed in a special wire barrel and must be used within 8 hours. Otherwise, it will be easily oxidized and need to be reprocessed.
  • the tungsten rod of the welding torch is made of tantalum tungsten rod, and the tungsten pole is ground into a round pile type, which is not too sharp but smooth and has no edges and corners.
  • the purity of argon should not be lower than 99.99%, and the water content should not exceed 50 mg/m 3 , and the gas flow rate should be 15-20 L/min.
  • the ambient temperature should not be lower than 5 °C, otherwise it should be preheated to 100-200 °C before welding.
  • the prepared test pieces are paired, no gap is left in the pair, and there is no angular deformation.
  • the welder current Before the bottom welding, set the welder current to 150-160A, the cleaning ratio is -20--15, and the AC bias value is 120.
  • the welding arc is at point A.
  • the welding torch is at an angle of 90° to the test piece. It cannot be tilted back and forth, and the tungsten extension length is about 3 mm.
  • the welding wire and the weld bead are at an angle of 50°-70°.
  • When adding the wire use a wire to gently melt the molten pool. Add wire to the back of the molten pool, do not add wire to the inside of the molten pool, and add wire to the inside of the molten pool. It is easy to cause the roots to be wireged.
  • the welding torch can be slightly oscillated up and down. Then the welding gun does not need to swing, and the welding speed should not be too slow. If the front molten pool is too thick and too wide after welding, it indicates that the root is not After penetration, the added wire melts into the molten pool on the surface.
  • the solder joints to be grounded should be ground, but the roots of the groove should not be worn through. If defects such as pores are found, stop the welding immediately, perform the grinding process, and check if the root of the weld is not fused.
  • the front arc-extinguishing point is polished out of the slope with a super-hard tungsten steel circular saw blade, so that the joint is relatively easy.
  • the arc should be started behind the slope.
  • the welding wire is added for welding.
  • the first arcing point A is polished out of the slope, and the arc is slowly set, leaving a "small tail".
  • the welder current Before welding the cover, set the welder current to 140-150A, the cleaning ratio is -20--5, and the AC bias value is 120.
  • the joints and high points of the bottom weld are slightly polished with a super-hard tungsten steel circular saw blade to smooth the underlying weld.
  • the welding gun is at an angle of 90° with the weld.
  • the welding wire can be wired at an angle to the shear line of the weld circle, and the welding gun is oscillated by a circular swing method.
  • the joints of the welds are also ground with a super-hard tungsten steel circular saw blade to ensure the height difference of the joints, and the original welds that are not damaged when grinding.
  • the first arcing point should be polished out of the slope, and the arc should be slowly closed to close a small tail.
  • the internal quality of the appearance scoring and the radiographic inspection are carried out according to the criteria of the competition specification document.
  • the database of the training process of the player is established, and the scores and problems of the welded specimens are entered into the database, and the training effect of the players is analyzed by big data. Constantly adjust and optimize the welding process parameters to achieve the best welding results and the best results.
  • the super-hard tungsten steel circular saw blade for aluminum alloy is used to grind the groove, and the groove angle is 35°.
  • the test piece solves the defect that the root of the test piece is not penetrated due to the small angle of the groove of the test piece, if you want to let The root penetration will increase the current, which will cause the outer edge to be melted, the edge of the groove to be narrow and narrow, and the subsequent welding The seam cover has a great influence. At the same time, the current is too large to greatly increase the probability of generating pores inside the weld. If a boring tool or a steel grinding head is used to polish the groove, the burr is present on the edge of the groove and the inner edge of the groove is easily damaged, resulting in defects such as pores and burn through during welding.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)

Abstract

L'invention concerne un procédé d'optimisation d'un processus de soudage à l'arc en atmosphère d'argon de tuyau en alliage d'aluminium, comprenant les étapes suivantes consistant : à réaliser un traitement de meulage de rainure sur des pièces contrôlées, l'angle de rainure étant réglé à 35 degrés, et le soudage étant effectué, après l'apparition de l'éclat métallique, en un temps défini; à réaliser une inspection par regroupement vertical des pièces contrôlées sur un cadre de poste de travail, l'inspection servant à déterminer la présence éventuelle de vides, et si des vides sont présents, à limer les bords de rainure de manière à les aplanir; à réaliser un polissage de fil de soudage, à polir une électrode en tungstène à tige en tungstène d'un pistolet à souder en une forme conique, et à réaliser un soudage à condition qu'une pureté d'argon définie, qu'une teneur en eau définie et qu'un flux de gaz défini soient maintenus; à regrouper les pièces contrôlées préparées, aucun vide n'étant réservé pendant le regroupement et aucune déformation de coin n'existant, et à réaliser successivement un soudage d'amorçage, une liaison par joints de soudure et un soudage de face de recouvrement; à détecter l'apparition de joints de soudure, à détecter la qualité intérieure au moyen d'un rayon, à transmettre les différentes données de produit fini soudé à une base de données, à réaliser une analyse de données massives, et en fonction de l'analyse de données, à régler et à optimiser en continu les paramètres du processus de soudage.
PCT/CN2017/000402 2017-06-26 2017-06-26 Procédé d'optimisation de processus de soudage à l'arc en atmosphère d'argon de tuyau en alliage d'aluminium Ceased WO2019000112A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/000402 WO2019000112A1 (fr) 2017-06-26 2017-06-26 Procédé d'optimisation de processus de soudage à l'arc en atmosphère d'argon de tuyau en alliage d'aluminium

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Application Number Priority Date Filing Date Title
PCT/CN2017/000402 WO2019000112A1 (fr) 2017-06-26 2017-06-26 Procédé d'optimisation de processus de soudage à l'arc en atmosphère d'argon de tuyau en alliage d'aluminium

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WO2019000112A1 true WO2019000112A1 (fr) 2019-01-03

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08238569A (ja) * 1995-03-02 1996-09-17 Matsushita Electric Ind Co Ltd 狭開先部のアーク溶接方法
US7304268B2 (en) * 2006-02-16 2007-12-04 Lincoln Global, Inc. Method for rating stick electrodes for pipe welding
CN102528238A (zh) * 2012-01-18 2012-07-04 江苏中核利柏特股份有限公司 手工钨极氩弧焊焊接工艺
CN102837115A (zh) * 2012-09-27 2012-12-26 中国化学工程第三建设有限公司 铝及铝合金设备或管道的无间隙焊接方法
CN105499805A (zh) * 2016-02-24 2016-04-20 山东雅百特科技有限公司 一种智能激光焊接系统及其工作方法
CN107225310A (zh) * 2017-06-22 2017-10-03 山东电力建设第工程公司 铝合金管氩弧焊接过程优化方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08238569A (ja) * 1995-03-02 1996-09-17 Matsushita Electric Ind Co Ltd 狭開先部のアーク溶接方法
US7304268B2 (en) * 2006-02-16 2007-12-04 Lincoln Global, Inc. Method for rating stick electrodes for pipe welding
CN102528238A (zh) * 2012-01-18 2012-07-04 江苏中核利柏特股份有限公司 手工钨极氩弧焊焊接工艺
CN102837115A (zh) * 2012-09-27 2012-12-26 中国化学工程第三建设有限公司 铝及铝合金设备或管道的无间隙焊接方法
CN105499805A (zh) * 2016-02-24 2016-04-20 山东雅百特科技有限公司 一种智能激光焊接系统及其工作方法
CN107225310A (zh) * 2017-06-22 2017-10-03 山东电力建设第工程公司 铝合金管氩弧焊接过程优化方法

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