CN1613595A - Method for double-tungsten argon arc preheating re-melting welding - Google Patents
Method for double-tungsten argon arc preheating re-melting welding Download PDFInfo
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Abstract
A preheating-resmelting argon arc welding with two tungsten electrodes features that after the workpiece to be welded is fixed to a moving mechanism, a primary and a secondary welding guns with a distance between them are respectively arranged above and under the workpiece for welding it at same time.
Description
Technical field
The present invention relates to a kind of welding method, specifically is a kind of method for double-tungsten argon arc preheating re-melting welding.Be used for welding technology field.
Background technology
Common welding procedure is because the factor of technology self in local fast heating and quick cooling procedure, can cause influences such as welding residual stress and welding deformation to workpiece inevitably.These factors have caused adverse effect to the production efficiency of welding and the performance of welding product.Welding deformation can make the reduction of product size precision and cause assembly precision to descend, and diminishes the outward appearance of workpiece, and the strength of joint between the workpiece is reduced.Welding Angular Deformation is owing to the different mechanism in local heat zone in the welding process are caused: the degree of temperature rise is depended in the thermal expansion of (1) part; (2) yield strength that temperature rise caused descends; (3) the lax or caused contraction of peripheral position deformation constrain of the expansion that plastic deformation caused; (4) contraction of part is depended on and be that is to say the degree of temperature rise in the cooling procedure, when the key factor that influences angular deformation is local heat in width and the thermograde of thickness direction and the mutual constraint that is caused in part inside thereof of plate.
Find through literature search prior art, people such as Tsai C L are at " Welding Journal " 1999,78 (5): deliver on 156～165 " Welding distortion of a thin plate panelstructure[J] " (and Welding Deformation of Sheet Structures [J]. welding magazine .1999,78 (5): 156～165), the measure of having introduced prevention and elimination welding deformation in this article comprises: beginning to apply reversal deformation before the welding, weld preheating, by reducing high-temperature area or reducing thermograde and prevent or reduce angular deformation, retrain angular deformation with weld jig, thermal recalibration or mechanical checkout angular deformation etc.But the equipment and the technology that adopt said method to need can increase labour intensity, reduce explained hereafter efficient.And because the thermal linear expansion coefficient of some light-alloy (as aluminium alloy, magnesium alloy etc.) is higher, pyroconductivity is better, yield strength is lower, so the distortion of these alloy welding points is more serious than the welding point of steel usually, all is faced with welding deformation prevention and calibration problem.The simple welding procedure that this just feasible exploitation can be used for relative broad range is very necessary, is particularly seeming particularly important aspect these lattens of control and the cut deal welding deformation.
Summary of the invention
The present invention is directed to the deficiencies in the prior art and defective, a kind of method for double-tungsten argon arc preheating re-melting welding is provided, make it can effectively control and reduce Welding Angular Deformation.
The present invention is achieved by the following technical solutions, and the present invention applies argon tungsten-arc welding simultaneously at the front and back of weld seam, and the master that is called in front welds, and weldering is assisted in being called of the back side, and the master welds and assists to be welded in certain distance on the welding direction.Weldment is fixed on the walking mechanism, upper and lower two welding guns are aimed at weld seam, at first the front welding gun welds in the striking of weldment end, when treating that the weldment end runs to back side welding gun, back side welding gun striking welding, when the weldment end arrived the front and back welding gun respectively, two welding guns successively ceased arc, welding gun lifts, and finishes welding process.Main weldering is also played the pre-heat effect to the auxilliary weldering in the back side simultaneously except general welding effect is arranged.Auxilliary weldering is played simultaneously to the anatexis at the main welding line back side and the effect that produces reversible deformation except general welding effect is arranged, and has improved the moulding of back of weld, has reduced the defective (as pore, lack of penetration, incomplete fusion etc.) of weld seam.
Main weldering welding current scope is at 60-200A; argon flow amount is 5-20L/min; auxilliary weldering welding current scope is at 50-200A; main weldering is 5-20L/min with auxilliary weldering welding gun protection throughput; main weldering is φ 0.8-2.2mm with auxilliary weldering welding gun tungsten electrode diameter; main weldering is 30-200mm with auxilliary weldering welding gun spacing, and main weldering is 5-15mm/s with the synchronous speed of welding of auxilliary weldering, and main weldering and auxilliary weldering welding gun angle (angle between welding gun and the plane, weld seam place) scope are at 50-80 °.The angular deformation amount of postwelding is controlled at 0.1-1.0mm/100mm (that is, the Welding Angular Deformation amount that is produced is 0-1.0mm) on every 100mm specimen width.
The welding line joint slope type that the present invention adopts is an I type joint geometry (square groove), double V-groove joint geometry, X type groove joint geometry.In welding process, welding wire can be added, also welding wire can be do not added.
Welding base metal is an aluminium alloy, magnesium alloy, titanium alloy, ferrous materials, and the welding of the xenogenesis material that makes up between them.
Main weldering and auxilliary weldering can be manual welding or weldering automatically; Perhaps main weldering is manual welding, and auxilliary weldering is weldering automatically; Perhaps main weldering is weldering automatically, and auxilliary weldering is manual welding.
Employed welding current is that ac/dc is dual-purpose, and automatically/manual dual-purpose.
For different mother metals and different welding procedures, employed protective gas is respectively argon gas, helium, nitrogen, carbon dioxide and their mist.Be specially: ferrous materials can use argon gas, helium, nitrogen, carbon dioxide and the mist between them (adopting different volume ratios according to actual needs); Aluminium alloy, magnesium alloy can use argon gas, helium and the mist between them (adopting different volume ratios according to actual needs).
Adopt the present invention that magnesium alloy sheet, aluminium alloy sheet and stainless sheet steel are welded.Be that (specimen size is 300 * 100 * 3.6mm to 3.6mm wrought magnesium alloy AZ31B sheet material wherein for thickness, I type joint form, no gap, do not add welding wire), two TIG welding gun spacings is 115mm, it is 130A that positive TIG master welds welding current, the auxilliary weldering of back side TIG welding current is 125A, two TIG welding gun tungsten electrode diameters are φ 1.6mm, two TIG welding gun speeds of welding are 10mm/s, two TIG welding gun argon flow amounts are 10L/min, and main weldering and auxilliary weldering welding gun angle (angle between welding gun and the plane, weld seam place) are 65 °.Postwelding measured angular deflection is 0.5mm/100mm (that is, the Welding Angular Deformation amount that is produced on every 100mm specimen width is 0.5mm).Show that employing double-tungsten argon arc preheating-remelting solder technology can control and reduce Welding Angular Deformation effectively.
Great advantage of the present invention is: when finishing positive welding, the localized temperature gradients that positive main weldering pre-heat effect also can be used for reducing to produce when the welding integral preheating reduces angular deformation; Can compensate the distortion that produces in the basic welding technical process at main postwelding by the auxilliary weldering of back side TIG reversible deformation effect, reduce the integral solder angular deformation with this.The auxilliary weldering in the back side simultaneously can be carried out remelting in the butt welded seam back side, further reduces labour intensity, improves welding production efficiency and product size precision.The present invention can effectively control and reduce Welding Angular Deformation, has numerous significant advantages.For example, improve welding quality, the labour intensity that reduces welding procedure, increase welding production efficiency, minimizing energy resource consumption etc.
Description of drawings
Fig. 1 the inventive method schematic diagram
The specific embodiment
Provide following examples below in conjunction with accompanying drawing and the inventive method content, the welder that embodiment adopts mainly comprises: main weldering welding gun 1; Auxilliary weldering welding gun 3; Straight track speed governing walking mechanism 4; Straight track 5; Pulse argon arc master welding machine 6; The auxilliary welding machine 7 of pulse argon arc etc.Wherein straight track speed governing walking mechanism adopts line slideway transmission, DC continuous speed regulation motor-driven.
The copper pad that weldment 2 is fixed on straight track speed governing walking mechanism 4 plays in the thermolysis weldment; guarantee master's weldering welding gun 1 and auxilliary weldering welding gun 3 aligning weld seams; adjust angle and welding gun spacing between suitable welding gun angle welding gun and the plane, weld seam place, determine welding conditions such as the speed of welding speed of travel, welding current and protection throughput.After all parameter adjustment is determined, carry out welding operation.At first positive main weldering welding gun 1 welds in weldment 2 end strikings, and when treating that weldment 2 ends run to the auxilliary weldering in back side welding gun 3,3 strikings of the auxilliary weldering in back side welding gun are welded.When the weldment end arrived the front and back welding gun respectively, two welding guns successively ceased arc, and welding gun lifts, and finishes welding process.
In welding process, positive TIG master's weldering is except finishing normal welding effect, and the localized temperature gradients that its pre-heat effect is used to reduce to produce when welding reduces angular deformation.Simultaneously, the auxilliary weldering of back side TIG reversible deformation effect reduces the angular deformation of weldment integral body by the distortion that produces in the compensation basic welding technical process.In addition, TIG auxilliary weldering in the back side can also be carried out remelting in the butt welded seam back side, has improved the back of weld moulding, reduces defectives such as pore that welding produces, lack of penetration, incomplete fusion, has improved welding quality, has reduced welding operation labour intensity.
Embodiment 1
Thickness is that (specimen size is 300 * 100 * 1.6mm to 1.6mm wrought magnesium alloy AZ31B sheet material, I type joint form, no gap, do not add welding wire), two TIG welding gun spacings is 30mm, it is 60A that positive TIG master welds welding current, the auxilliary weldering of back side TIG welding current is 50A, two TIG welding gun tungsten electrode diameters are φ 0.8mm, two TIG welding gun speeds of welding are 15mm/s, two TIG welding gun argon flow amounts are 5L/min, and main weldering and auxilliary weldering welding gun angle (angle between welding gun and the plane, weld seam place) are 50 °.Postwelding measured angular deflection is 0.1mm/100mm (that is, the Welding Angular Deformation amount that is produced on every 100mm specimen width is 0.1mm).
Thickness is that (specimen size is 300 * 100 * 3.6mm to 3.6mm wrought magnesium alloy AZ31B sheet material, I type joint form, no gap, do not add welding wire), two TIG welding gun spacings is 115mm, it is 130A that positive TIG master welds welding current, the auxilliary weldering of back side TIG welding current is 125A, two TIG welding gun tungsten electrode diameters are φ 1.6mm, two TIG welding gun speeds of welding are 10mm/s, two TIG welding gun argon flow amounts are 10L/min, and main weldering and auxilliary weldering welding gun angle (angle between welding gun and the plane, weld seam place) are 65 °.Postwelding measured angular deflection is 0.5mm/100mm (that is, the Welding Angular Deformation amount that is produced on every 100mm specimen width is 0.5mm).
Embodiment 3
Thickness is that (specimen size is 300 * 100 * 8mm to 8mm wrought magnesium alloy AZ31B sheet material, I type joint form, no gap, do not add welding wire), two TIG welding gun spacings is 200mm, it is 200A that positive TIG master welds welding current, the auxilliary weldering of back side TIG welding current is 200A, two TIG welding gun tungsten electrode diameters are φ 2.2mm, two TIG welding gun speeds of welding are 5mm/s, two TIG welding gun argon flow amounts are 15L/min, and main weldering and auxilliary weldering welding gun angle (angle between welding gun and the plane, weld seam place) are 80 °.Postwelding measured angular deflection is 1.0mm/100mm (that is, the Welding Angular Deformation amount that is produced on every 100mm specimen width is 1.0mm).
Embodiment 4
Thickness is that (specimen size is 300 * 100 * 4mm to 4mm A5083 aluminum latten, I type joint form, no gap, do not add welding wire), two TIG welding gun spacings is 115mm, it is 130A that positive TIG master welds welding current, the auxilliary weldering of back side TIG welding current is 125A, two TIG welding gun tungsten electrode diameters are φ 1.6mm, two TIG welding gun speeds of welding are 10mm/s, two TIG welding gun argon flow amounts are 10L/min, and main weldering and auxilliary weldering welding gun angle (angle between welding gun and the plane, weld seam place) are 65 °.Postwelding measured angular deflection is 0.4mm/100mm (that is, the Welding Angular Deformation amount that is produced on every 100mm specimen width is 0.4mm).
Thickness is that (specimen size is 300 * 100 * 4mm to 4mm austenitic stainless steel 304 sheet materials, I type joint form, no gap, do not add welding wire), two TIG welding gun spacings is 115mm, it is 130A that positive TIG master welds welding current, the auxilliary weldering of back side TIG welding current is 125A, two TIG welding gun tungsten electrode diameters are φ 1.6mm, two TIG welding gun speeds of welding are 5mm/s, two TIG welding gun argon flow amounts are 10L/min, and main weldering and auxilliary weldering welding gun angle (angle between welding gun and the plane, weld seam place) are 65 °.Postwelding measured angular deflection is 0.5mm/100mm (that is, the Welding Angular Deformation amount that is produced on every 100mm specimen width is 0.5mm).
Claims (7)
1, a kind of double-tungsten argon arc preheating-remelting welding method, it is characterized in that, front and back at weld seam applies argon tungsten-arc welding simultaneously, positive main weldering has distance with auxilliary being welded at the back side on the welding direction, weldment is fixed on the walking mechanism, upper and lower two welding guns are aimed at weld seam, at first the front welding gun welds in the striking of weldment end, when treating that the weldment end runs to back side welding gun, back side welding gun striking welding, when the weldment end arrived the front and back welding gun respectively, two welding guns successively ceased arc, welding gun lifts, and finishes welding process.
2, double-tungsten argon arc preheating according to claim 1-remelting welding method; it is characterized in that; main weldering welding current scope is at 60-200A; argon flow amount is 5-20L/min; auxilliary weldering welding current scope is at 50-200A; main weldering is 5-20L/min with auxilliary weldering welding gun protection throughput; main weldering is Ф 0.8-2.2mm with auxilliary weldering welding gun tungsten electrode diameter; main weldering is 30-200mm with auxilliary weldering welding gun spacing; main weldering is 5-15mm/s with the synchronous speed of welding of auxilliary weldering; main weldering and auxilliary weldering welding gun angular range are at 50-80 °, and the angular deformation amount of postwelding is controlled at 0.1-1.0mm/100mm.
3, double-tungsten argon arc preheating according to claim 1-remelting welding method is characterized in that, the welding line joint slope type of employing is an I type joint geometry, the double V-groove joint geometry, and X type groove joint geometry is in welding process or add welding wire.
4, double-tungsten argon arc preheating according to claim 1-remelting welding method is characterized in that, welding base metal is an aluminium alloy, magnesium alloy, titanium alloy, ferrous materials, and the xenogenesis material that makes up between them.
5, double-tungsten argon arc preheating according to claim 1-remelting welding method is characterized in that, main weldering and auxilliary weldering are manual welding or weldering automatically; Perhaps main weldering is manual welding, and auxilliary weldering is weldering automatically; Perhaps main weldering is weldering automatically, and auxilliary weldering is manual welding.
6, double-tungsten argon arc preheating according to claim 1-remelting welding method is characterized in that, employed welding current is that ac/dc is dual-purpose, and automatically/manual dual-purpose.
7, double-tungsten argon arc preheating according to claim 1-remelting welding method; it is characterized in that; for all kinds of mother metals and welding procedure; employed protective gas is respectively argon gas, helium, nitrogen, carbon dioxide and their mist; be specially: ferrous materials uses argon gas, helium, nitrogen, carbon dioxide and the mist between them, and aluminium alloy, magnesium alloy use argon gas, helium and the mist between them.
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Cited By (14)
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| CN101077545B (en) * | 2006-05-23 | 2010-05-12 | 西安西开高压电气股份有限公司 | Single-side MIG and TIG synchronous automatic soldering method |
| CN102971103A (en) * | 2010-07-13 | 2013-03-13 | 乔治洛德方法研究和开发液化空气有限公司 | Method for arc-welding aluminum-coated metal parts using an inert gas containing nitrogen |
| CN103182592A (en) * | 2011-12-28 | 2013-07-03 | 哈尔滨学兴科技开发有限公司 | Alternating current and direct current hybrid welding method and device |
| CN103978287A (en) * | 2014-05-12 | 2014-08-13 | 中国能源建设集团江苏省电力建设第三工程公司 | Flame-preheating-free argon arc welding method for red copper |
| CN104439648A (en) * | 2014-11-27 | 2015-03-25 | 芜湖中集瑞江汽车有限公司 | 3-5 mm-thick plate aluminum and 3-5 mm-thick plate aluminum alloy TIG welding process |
| CN104475936A (en) * | 2014-11-27 | 2015-04-01 | 芜湖中集瑞江汽车有限公司 | Tungsten inert gas shielded welding process of 3mm-thickness steel plates |
| CN106180963A (en) * | 2015-04-30 | 2016-12-07 | 江南造船(集团)有限责任公司 | A kind of two-sided pair of GMAW welding method |
| CN106670627A (en) * | 2016-12-14 | 2017-05-17 | 辽宁忠旺特种车辆制造有限公司 | Automatic welding technique for splicing plates of cylinder body of oil tank truck |
| CN106835003A (en) * | 2017-03-30 | 2017-06-13 | 徐工集团工程机械有限公司 | Remelting apparatus |
| CN108436234A (en) * | 2018-03-07 | 2018-08-24 | 北京科技大学 | A kind of double heat sources collaboration welding methods of big thermal conductivity mismatch metal material and device |
| CN109530893A (en) * | 2019-01-09 | 2019-03-29 | 苏州长风航空电子有限公司 | A kind of method of novel argon arc welding hot sizing |
| CN109693051A (en) * | 2019-01-16 | 2019-04-30 | 浙江省海洋开发研究院 | A kind of ship plate sheet welding device |
| CN110711924A (en) * | 2019-10-11 | 2020-01-21 | 上海航天精密机械研究所 | Method suitable for reducing titanium alloy TIG welding circumferential weld pore defects |
| CN118543937A (en) * | 2024-07-24 | 2024-08-27 | 中船黄埔文冲船舶有限公司 | TA3 titanium plate butt joint welding deformation control method |
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- 2004-11-25 CN CN 200410084552 patent/CN1613595A/en active Pending
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| CN101077545B (en) * | 2006-05-23 | 2010-05-12 | 西安西开高压电气股份有限公司 | Single-side MIG and TIG synchronous automatic soldering method |
| CN102971103A (en) * | 2010-07-13 | 2013-03-13 | 乔治洛德方法研究和开发液化空气有限公司 | Method for arc-welding aluminum-coated metal parts using an inert gas containing nitrogen |
| CN102971103B (en) * | 2010-07-13 | 2016-01-20 | 乔治洛德方法研究和开发液化空气有限公司 | The inert gas arc welding comprising nitrogen is used to aluminize the method for metal parts |
| CN103182592A (en) * | 2011-12-28 | 2013-07-03 | 哈尔滨学兴科技开发有限公司 | Alternating current and direct current hybrid welding method and device |
| CN103978287A (en) * | 2014-05-12 | 2014-08-13 | 中国能源建设集团江苏省电力建设第三工程公司 | Flame-preheating-free argon arc welding method for red copper |
| CN104439648A (en) * | 2014-11-27 | 2015-03-25 | 芜湖中集瑞江汽车有限公司 | 3-5 mm-thick plate aluminum and 3-5 mm-thick plate aluminum alloy TIG welding process |
| CN104475936A (en) * | 2014-11-27 | 2015-04-01 | 芜湖中集瑞江汽车有限公司 | Tungsten inert gas shielded welding process of 3mm-thickness steel plates |
| CN106180963A (en) * | 2015-04-30 | 2016-12-07 | 江南造船(集团)有限责任公司 | A kind of two-sided pair of GMAW welding method |
| CN106670627A (en) * | 2016-12-14 | 2017-05-17 | 辽宁忠旺特种车辆制造有限公司 | Automatic welding technique for splicing plates of cylinder body of oil tank truck |
| CN106835003A (en) * | 2017-03-30 | 2017-06-13 | 徐工集团工程机械有限公司 | Remelting apparatus |
| CN106835003B (en) * | 2017-03-30 | 2022-06-07 | 徐工集团工程机械有限公司 | Remelting device |
| CN108436234A (en) * | 2018-03-07 | 2018-08-24 | 北京科技大学 | A kind of double heat sources collaboration welding methods of big thermal conductivity mismatch metal material and device |
| CN109530893A (en) * | 2019-01-09 | 2019-03-29 | 苏州长风航空电子有限公司 | A kind of method of novel argon arc welding hot sizing |
| CN109693051A (en) * | 2019-01-16 | 2019-04-30 | 浙江省海洋开发研究院 | A kind of ship plate sheet welding device |
| CN109693051B (en) * | 2019-01-16 | 2021-06-22 | 浙江省海洋开发研究院 | Boats and ships sheet metal welding set |
| CN110711924A (en) * | 2019-10-11 | 2020-01-21 | 上海航天精密机械研究所 | Method suitable for reducing titanium alloy TIG welding circumferential weld pore defects |
| CN118543937A (en) * | 2024-07-24 | 2024-08-27 | 中船黄埔文冲船舶有限公司 | TA3 titanium plate butt joint welding deformation control method |
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