CN109530858B - Method for improving aluminum alloy electric arc additive metallurgy strength - Google Patents
Method for improving aluminum alloy electric arc additive metallurgy strength Download PDFInfo
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- CN109530858B CN109530858B CN201811600451.3A CN201811600451A CN109530858B CN 109530858 B CN109530858 B CN 109530858B CN 201811600451 A CN201811600451 A CN 201811600451A CN 109530858 B CN109530858 B CN 109530858B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al as the principal constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
Abstract
The invention discloses a method for improving the strength of aluminum alloy electric arc additive metallurgy, which comprises the following steps: planning an additive path in advance according to the shape of the aluminum alloy component; the welding gun swings on a plane parallel to the substrate by taking the additive path as an axis, a swing track is formed by sequentially connecting a plurality of repeating units end to end, the repeating units are formed by connecting two isosceles trapezoid tracks distributed on two sides of the axis end to end, the isosceles trapezoid tracks are formed by two waists and a shorter bottom edge, and the two isosceles trapezoid tracks are in central symmetry relative to a connecting point; the amplitude of the swing track is 2-5mm, the traveling time of the welding gun at the two maximum amplitude positions of the repeating units is 0.1-0.2s, and the time of the welding gun for forming each repeating unit is 0.3-0.6 s. The aluminum alloy member manufactured and formed by the method has good metallurgical bonding performance, and the strength can be improved to more than 90% of that of the base material.
Description
Technical Field
The invention belongs to the field of additive manufacturing, and particularly relates to a method for improving the electric arc additive metallurgical strength of an aluminum alloy.
Background
In the field of additive manufacturing, the additive manufacturing technology of metal parts using electric arcs as heat sources has the advantages of simple equipment, high material utilization rate, high production efficiency and the like. The electric arc additive manufacturing technology adopts electric arc as a heat source to melt metal wire materials, and layers are stacked on a substrate according to a set forming path until metal parts are formed. Therefore, arc additive technology is an important research direction for direct manufacturing of low-cost metal parts. The aluminum alloy material is widely applied to aerospace product manufacturing, the weight of the product can be effectively reduced, and the flying performance of the product is improved.
However, the electric arc additive manufacturing process is realized by layer-by-layer accumulation, and with the increase of the number of layers, the accumulated parts have serious heat accumulation, poor heat dissipation conditions between layers and overheating of a molten pool, so that the metallurgical bonding strength of the parts is directly influenced. Meanwhile, in the process of aluminum alloy electric arc additive, because the solubility of hydrogen in liquid aluminum is very high and the solubility in solid aluminum is almost zero, when a molten pool is cooled to the solidification temperature, the solubility of hydrogen is very low, a large amount of hydrogen is separated out and cannot escape in time, a large amount of hydrogen holes are formed in the aluminum alloy, and the mechanical property of parts is reduced. Therefore, the improvement of the aluminum alloy electric arc additive metallurgy strength is one of the main bottlenecks of the aluminum alloy additive manufacturing technology.
Disclosure of Invention
The technical problem solved by the invention is as follows: overcomes the defects of the prior art and provides a method for improving the aluminum alloy electric arc additive metallurgical strength.
The technical solution of the invention is as follows:
a method for improving the electric arc additive metallurgical strength of an aluminum alloy comprises the following steps:
adopting an aluminum alloy welding wire, and implementing an electric arc additive manufacturing process of the aluminum alloy component by using a cold metal transition welding machine;
during the process of performing arc additive manufacturing on each layer of the aluminum alloy component, planning an additive path in advance according to the shape of the aluminum alloy component, and continuously advancing a welding gun of the cold metal transition welding machine along the additive path so as to enable the aluminum alloy welding wire to form a stacked layer on a substrate; the welding gun swings on a plane parallel to the substrate by taking the additive path as an axis, a swing track is formed by sequentially connecting a plurality of repeating units end to end, the repeating units are formed by connecting two isosceles trapezoid tracks distributed on two sides of the axis end to end, the isosceles trapezoid tracks are formed by two waists and a shorter bottom edge, and the two isosceles trapezoid tracks are in central symmetry relative to a connecting point; the amplitude of the swing track is 2-5mm, the traveling time of the welding gun at the two maximum amplitude positions of the repeating units is 0.1-0.2s, and the time of the welding gun for forming each repeating unit is 0.3-0.6 s.
Preferably, in the method for improving the aluminum alloy electric arc additive metallurgical strength, the aluminum alloy welding wire is a 5B06 aluminum alloy welding wire.
Preferably, in the method for improving the electric arc additive metallurgical strength of the aluminum alloy, the diameter of the aluminum alloy welding wire is 1.2 mm.
Preferably, in the method for improving the aluminum alloy electric arc additive metallurgical strength, in the process of electric arc additive manufacturing of each layer of the aluminum alloy component, the length of the aluminum alloy welding wire extending out of a wire guide nozzle of the welding gun is 12-15mm, and the wire feeding speed is 7-9 m/min.
Preferably, in the method for improving the arc additive metallurgical strength of the aluminum alloy, the traveling speed of the welding gun is 8-11 mm/s in the process of performing arc additive manufacturing on each layer of the aluminum alloy component.
Preferably, in the method for improving the electric arc additive metallurgical strength of the aluminum alloy, the cold metal transition welding machine works in a mixed transition mode of a cold metal transition process and pulse transition during the electric arc additive manufacturing process of each layer of the aluminum alloy component.
Preferably, in the method for improving the electric arc additive metallurgical strength of the aluminum alloy, 99.999% high-purity argon is adopted for front protection in the process of electric arc additive manufacturing of each layer of the aluminum alloy component, and the flow rate is 18-20L/min.
Preferably, in the method for improving the electric arc additive metallurgical strength of the aluminum alloy, the substrate is made of a 5A06 aluminum alloy plate with the thickness of 20 mm; before the electric arc additive manufacturing, the substrate is subjected to acid cleaning, and then the surface is polished to be flat and wiped clean by acetone.
Preferably, in the method for improving the electric arc additive metallurgical strength of the aluminum alloy, before the electric arc additive manufacturing is performed on each layer of the aluminum alloy component, a primer layer is manufactured on the substrate, when the primer layer is manufactured, the welding current is 20-50A larger than the additive current, the cold metal transition welding machine works in a mixed transition mode of a cold metal transition process and pulse transition, the width of the primer layer is larger than that of an upper layer accumulation layer formed on the primer layer, and the surface of the primer layer is flat.
Compared with the prior art, the invention has the following advantages:
the invention adopts a cold metal transition welding machine to carry out an electric arc additive manufacturing process, and in the process of carrying out electric arc additive manufacturing on each layer of the aluminum alloy component, a welding gun swings on a plane parallel to a substrate by taking an additive path as an axis, so that a specific swing track is formed. The aluminum alloy member formed by the method consists of a full-weld structure, gas in a molten pool is more easily stirred and separated out under the action of the swinging of the welding wire, the melting depth is increased, the metal density is high, the metallurgical bonding performance is good, and the strength of the aluminum alloy member can be improved to more than 90% of that of a base metal. The invention has the advantages of low equipment investment, high material utilization rate (close to 100 percent), reduced production cost and shortened production period.
Drawings
FIG. 1 is a schematic view of a welding gun swing trajectory in one embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The invention provides a method for improving the electric arc additive metallurgical strength of an aluminum alloy, which comprises the following steps: adopting an aluminum alloy welding wire, and implementing an electric arc additive manufacturing process of the aluminum alloy component by using a cold metal transition welding machine; during the process of performing arc additive manufacturing on each layer of the aluminum alloy component, planning an additive path in advance according to the shape of the aluminum alloy component, and continuously advancing a welding gun of the cold metal transition welding machine along the additive path so as to enable the aluminum alloy welding wire to form a stacked layer on a substrate; the welding gun swings on a plane parallel to the substrate by taking the additive path as an axis, a swing track is formed by sequentially connecting a plurality of repeating units end to end, the repeating units are formed by connecting two isosceles trapezoid tracks distributed on two sides of the axis end to end, the isosceles trapezoid tracks are formed by two waists and a shorter bottom edge, and the two isosceles trapezoid tracks are in central symmetry relative to a connecting point; the amplitude of the swing track is 2-5mm, the traveling time of the welding gun at the two maximum amplitude positions of the repeating units is 0.1-0.2s, and the time of the welding gun for forming each repeating unit is 0.3-0.6s (the swing track is shown in figure 1).
The invention adopts a CMT welding machine (CMT) to provide a heat source for arc additive manufacturing. The aluminum alloy components are layered in advance on a data processing system, an additive path of each layer is planned, a welding gun moves according to the planned additive path during welding (welding wires are arranged on a welding gun head, and the movement of the welding gun actually means the movement of the welding wires), and each time the welding gun moves from one end of the additive path of one layer to the other end, the aluminum alloy welding wires form a layer of accumulation layer on a substrate. And the welding gun finishes the electric arc additive manufacturing of one layer, moves upwards for a certain distance, and continues the electric arc additive manufacturing of the previous layer, so that the electric arc additive manufacturing process of the aluminum alloy component is finished layer by layer.
Wherein, in the process of performing electric arc additive manufacturing on each layer, the welding gun swings around the additive path. The welding gun swings on a plane parallel to the substrate by taking the material adding path as an axis, and the swinging track of the welding gun is formed by sequentially connecting a plurality of repeating units end to end. That is, the trailing end of a preceding repeat unit is connected to the leading end of a subsequent repeat unit. The repeating unit is formed by connecting two isosceles trapezoid tracks end to end, the isosceles trapezoid tracks are formed by two waists and a shorter bottom edge (the isosceles trapezoid tracks do not have the longer bottom edge), and the two isosceles trapezoid tracks are distributed in central symmetry relative to a connecting point between the two isosceles trapezoid tracks. A repeating unit is to be understood approximately in the form of a sinusoid, but a sinusoid is formed by two wave-shaped curve segments, whereas the repeating unit of the invention is formed by two isosceles trapezoidal tracks. The amplitude of the swing track is 2-5mm, namely, the distance from the shorter bottom edge of the isosceles trapezoid track of the repeating unit to the additive path is 2-5 mm. The travel time of the welding gun at the two maximum amplitude positions of the repeating unit is 0.1-0.2s, namely the welding gun travels forwards at the position after swinging to the starting position of the maximum amplitude position (the shorter bottom side of the isosceles trapezoid track), and the travel time is 0.1-0.2s, so that the travel distance of the welding gun at the maximum amplitude position, namely the length of the shorter bottom side of the isosceles trapezoid track, can be calculated by multiplying the travel time by the travel speed of the welding gun. The time for the welding gun to form each repeating unit is 0.3-0.6s, the total time for the welding gun to travel at the positions of the four waists of the repeating unit is 0.1-0.2s, and the travel time for the welding gun to travel at each waist is 0.025-0.05 s because the four waists are the same. Using the torch travel speed and travel time, the length of each waist can be calculated.
The invention designs specific swinging motion for the welding gun, so that the welding gun forms a specific swinging track. During cold metal transition welding, the welding wire is stretched out and withdrawn at certain frequency, the arc burns and extinguishes repeatedly, and the arc swings with the welding gun during burning, so that the molten pool is stirred, gas in the molten pool is precipitated, the purposes of refining grains, homogenizing tissues and reducing pores are achieved, and the interlayer bonding strength is improved. The welding gun moves forward in a swinging mode, and molten drops fall off rapidly under the action of centrifugal force, so that molten drop transition is promoted. The maximum amplitude position corresponds to two ends of the molten pool, and the welding gun continues to move forwards for 0.1-0.2s at the maximum amplitude position after swinging to the maximum amplitude position, so that the welding gun can be maintained temporarily at the maximum amplitude position, the heat input quantity at two ends of the molten pool can be increased, and the fusion depth is increased. In the range of 0.1-0.2s, the longer the time is, the deeper the fusion depth is, and the better the performance is; the shorter the time, the better the surface formation. Outside the range of 0.1-0.2s, the stability of the welding process may be affected. When the swing amplitude (amplitude) is 2 to 5mm, the surface formation is good. Within the range of 2-5mm, the swing amplitude is increased, the fusion width is increased, the fusion depth is reduced, the fusion height is increased, and the performance is better.
The aluminum alloy member formed by the method consists of a full-weld structure, gas in a molten pool is more easily stirred and separated out under the action of the swinging of the welding wire, the melting depth is increased, the metal density is high, the metallurgical bonding performance is good, and the strength of the aluminum alloy member can be improved to more than 90% of that of a base metal.
In addition, the invention has the advantages of low equipment investment, high material utilization rate (close to 100 percent), reduced production cost and shortened production period.
The welding gun is arranged on a Funac six-axis mechanical arm, and the mechanical arm drives the welding gun to move.
In a preferred embodiment, in the method for improving the electric arc additive metallurgical strength of the aluminum alloy, the aluminum alloy welding wire is a 5B06 aluminum alloy welding wire.
In a preferred embodiment, in the method for improving the electric arc additive metallurgical strength of the aluminum alloy, the diameter of the aluminum alloy welding wire is 1.2 mm.
The aluminum alloy member produced by the present invention is formed of an all-welded structure, and the thickness thereof depends on the aluminum alloy welding wire. When the aluminum alloy member with a very thin thickness is manufactured, the member still has good strength performance.
In a preferred embodiment, in the method for improving the electric arc additive metallurgical strength of the aluminum alloy, during the electric arc additive manufacturing process of each layer of the aluminum alloy component, the length of the aluminum alloy welding wire extending out of a wire guide nozzle of the welding gun is 12-15mm, and the wire feeding speed is 7-9 m/min.
When the wire feeding speed is 7m/min-9m/min, the surface forming is best, the wire feeding speed is increased, and the fusion width, the fusion depth and the height of a molten pool are increased. The additive current will automatically change with changes in wire feed speed, which changes the melting speed.
In a preferred embodiment, in the method for improving the arc additive metallurgical strength of the aluminum alloy, the traveling speed of the welding gun is 8-11 mm/s during the arc additive manufacturing process of each layer of the aluminum alloy component.
When the advancing speed of the welding gun is 8-11 mm/s, the surface is formed smoothly and beautifully, and the melt width and the melt height are reduced along with the increase of the advancing speed of the welding gun.
In a preferred embodiment, in the method for improving the arc additive metallurgical strength of the aluminum alloy, the cold metal transition welding machine is operated in a mixed transition mode of a cold metal transition process and pulse transition during the arc additive manufacturing process of each layer of the aluminum alloy component.
In the welding process, firstly, the electric arc is ignited, the molten drop is transited to a molten pool, the electric arc is extinguished after the molten drop enters the molten pool, and the current is reduced until short circuit occurs. The short circuit signal is detected by the DSP and fed back to the wire feeder, and the wire feeder pumps back the wire material, so that the wire material is separated from the molten drops, and the molten drops are transited in a current-free state. And then changing the moving direction of the wire, re-arcing and stacking, and repeating the steps to finally finish the additive manufacturing process.
When the aluminum alloy member is welded, the CMT transition and pulse transition mixed mode is adopted, so that the surface forming effect of the welding line is further improved, and the welding quality is improved.
In a preferred embodiment, in the method for improving the arc additive metallurgical strength of the aluminum alloy, during the arc additive manufacturing of each layer of the aluminum alloy component, 99.999% high-purity argon is used for front protection, and the flow rate is 18-20L/min.
In a preferred embodiment, in the method for improving the electric arc additive metallurgical strength of the aluminum alloy, the substrate is made of a 5A06 aluminum alloy plate with the thickness of 20 mm; before the electric arc additive manufacturing, the substrate is subjected to acid cleaning, and then the surface is polished to be flat and wiped clean by acetone.
In a preferred embodiment, before arc additive manufacturing is performed on each layer of the aluminum alloy component, a primer layer is manufactured on the substrate, when the primer layer is manufactured, the welding current is 20-50A larger than the additive current, the cold metal transition welding machine works in a mixed transition mode of a cold metal transition process and pulse transition, the width of the primer layer is larger than that of an upper layer accumulation layer formed on the primer layer, and the surface of the primer layer is flat. An aluminum alloy member is formed on the primer layer.
Example 1
(1) And (3) polishing the surface of the pickled 5A06 substrate with the thickness of 20mm by using a grinder to be flat, exposing bright white metal, and wiping the bright white metal by using acetone or absolute ethyl alcohol.
(2) The base plate is fixed on the workbench, and the bottom plate is ensured to be within the range of the travel of the robot.
(3) And adopting 99.999% high-purity argon for front protection, wherein the flow is 18-20L/min.
(4) The method is characterized in that three layers of arc starting points are arranged at proper positions of a substrate for priming, the mode adopts C + P (a mixed transition mode of CMT transition and pulse transition), the welding current is about 20-50A larger than the upper layer forming current (namely additive current), the surface of the priming layer is formed to be wider and flat, and the upper layer can be completely paved on the surface of the priming layer.
(5) After the bottoming is finished, selecting proper arc starting points which are two linear ends and are positioned in the center of a formed workpiece, and ensuring that a welding gun is in a safe area in the operation process.
The raw material is 5B06 aluminum alloy welding wire with the diameter of 1.2mm, and the welding wire extends out of the wire guide nozzle by 12-15 mm.
The swing process parameters are used instead to perform the solid part (i.e. the aluminium alloy member) deposition.
The additive current is 100A, the wire feeding speed is 7.5m/min, and the advancing speed of the welding gun is 8 mm/s.
In the material adding process, the welding gun is subjected to swing operation, the swing mode is shown in fig. 1, the amplitude W is 3mm, the forward travel time is 0.1s at two maximum amplitude positions in one repeating unit, the travel distance L1 of the welding gun at the peak is 0.1 × 8-0.8 mm, the travel distance L2 of the welding gun at the trough is 0.1 × 8-0.8 mm, and the length L of one swing period is 0.8+0.8+0.2 × 8-3.2 mm.
The height of the single-layer cladding layer is 1.2mm, and the width is 10 mm.
The additive mode adopts a C + P mode (a cold metal transition process and a pulse mixing transition mode).
The mechanical arm runs in a linear reciprocating mode. The aluminum alloy straight wall plate with the width of 100mm, the height of 200mm and the wall thickness of 10mm is manufactured by the reciprocating forming.
The additive sample member piled by the method has the tensile strength of more than or equal to 275MPa and the elongation of more than or equal to 10 percent.
Example 2
In the step (5), the additive current is 100A, the wire feeding speed is 7m/min, and the advancing speed of a welding gun is 8 mm/s.
In the material adding process, the welding gun is subjected to swing operation, the swing mode is shown in fig. 1, the amplitude W is 2mm, the forward travel time at the maximum amplitude position is 0.2s, the travel distance L1 of the welding gun at the peak is 0.2 × 8 and 1.6mm, the travel distance L2 of the welding gun at the trough is 0.2 × 8 and 1.6mm, and the length L of one swing period is 1.6+1.6+0.2 × 8 and 4.8 mm.
The height of the single-layer cladding layer is 1.2mm, and the width is 10 mm.
The additive mode adopts a C + P mode (a cold metal transition process and a pulse mixing transition mode). The transition was made in the same manner as in example 1.
The mechanical arm runs in a linear reciprocating mode. The aluminum alloy straight wall plate with the width of 100mm, the height of 200mm and the wall thickness of 10mm is manufactured by the reciprocating forming.
The additive sample stacked by the method has the tensile strength of about 290MPa and the elongation rate of more than or equal to 10 percent.
Example 3
In the step (5), the additive current is 100A, the wire feeding speed is 9m/min, and the advancing speed of a welding gun is 11 mm/s.
In the material adding process, the welding gun is subjected to swing operation, the swing mode is shown in figure 1, the amplitude W is 5mm, the forward travel time at the maximum amplitude position is 0.2s, the travel distance L1 of the welding gun at the peak is 0.2 × 11 and 1.1mm, the travel distance L2 of the welding gun at the trough is 0.2 × 11 and 1.1mm, and the length L of one swing period is 1.1+1.1+0.1 × 11 and 3.3 mm.
The height of the single-layer cladding layer is 1.2mm, and the width is 10 mm.
The additive mode adopts a C + P mode (a cold metal transition process and a pulse mixing transition mode). The transition was made in the same manner as in example 1.
The mechanical arm runs in a linear reciprocating mode. The aluminum alloy straight wall plate with the width of 100mm, the height of 200mm and the wall thickness of 10mm is manufactured by the reciprocating forming.
The additive sample stacked by the method has the tensile strength of about 300MPa and the elongation rate of more than or equal to 15 percent.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications without departing from the spirit and scope of the present invention.
Claims (4)
1. The method for improving the electric arc additive metallurgical strength of the aluminum alloy is characterized by comprising the following steps of:
adopting an aluminum alloy welding wire, and implementing an electric arc additive manufacturing process of the aluminum alloy component by using a cold metal transition welding machine;
during the process of performing arc additive manufacturing on each layer of the aluminum alloy component, planning an additive path in advance according to the shape of the aluminum alloy component, and continuously advancing a welding gun of the cold metal transition welding machine along the additive path so as to enable the aluminum alloy welding wire to form a stacked layer on a substrate; the welding gun swings on a plane parallel to the substrate by taking the additive path as an axis, a swing track is formed by sequentially connecting a plurality of repeating units end to end, the repeating units are formed by connecting two isosceles trapezoid tracks distributed on two sides of the axis end to end, the isosceles trapezoid tracks are formed by two waists and a shorter bottom edge, and the two isosceles trapezoid tracks are in central symmetry relative to a connecting point; the amplitude is 2-5mm, the travel time of the welding gun at the two maximum amplitude positions of the repeating unit is 0.1-0.2s, and the time of the welding gun for forming each repeating unit is 0.3-0.6 s;
the aluminum alloy welding wire is a 5B06 aluminum alloy welding wire; the diameter of the aluminum alloy welding wire is 1.2 mm;
in the process of performing electric arc additive manufacturing on each layer of the aluminum alloy component, the length of the aluminum alloy welding wire extending out of a wire guide nozzle of the welding gun is 12-15mm, and the wire feeding speed is 7-9 m/min; the advancing speed of the welding gun is 8-11 mm/s; the cold metal transition welding machine works in a cold metal transition process and a pulse mixed transition mode.
2. The method of increasing arc additive metallurgical strength of an aluminum alloy according to claim 1, wherein the front side protection is performed with 99.999% high purity argon at a flow rate of 18-20L/min during arc additive manufacturing of each layer of the aluminum alloy member.
3. The method for improving the electric arc additive metallurgical strength of the aluminum alloy according to claim 1, wherein the base plate is made of a 5A06 aluminum alloy plate with the thickness of 20 mm; before the electric arc additive manufacturing, the substrate is subjected to acid cleaning, and then the surface is polished to be flat and wiped clean by acetone.
4. The method for improving the electric arc additive metallurgical strength of the aluminum alloy according to claim 1, wherein before the electric arc additive manufacturing is carried out on each layer of the aluminum alloy component, a base layer is manufactured on the substrate, the welding current is 20-50A greater than the additive current when the base layer is manufactured, the cold metal transition welding machine works in a mixed transition mode of a cold metal transition process and pulse transition, the width of the base layer is greater than that of an upper layer accumulation layer formed on the base layer, and the surface of the base layer is flat.
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| CN111014886A (en) * | 2019-12-30 | 2020-04-17 | 中国电子科技集团公司第二十研究所 | Manufacturing method of aluminum alloy box body type part based on electric arc additive |
| CN111390344B (en) * | 2020-03-23 | 2022-07-12 | 北京航星机器制造有限公司 | Method for planning electric arc additive manufacturing path without lap joint in layer |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014074379A1 (en) * | 2012-11-12 | 2014-05-15 | General Electric Company | Method for manufacturing rotary article by cold metal transfer welding deposition and rotary article as manufactured |
| CN105665878A (en) * | 2016-04-11 | 2016-06-15 | 南京埃斯顿机器人工程有限公司 | Space triangle swing welding method for welding arc-shaped welding seam through welding robot |
| CN106825859A (en) * | 2017-01-16 | 2017-06-13 | 北京航星机器制造有限公司 | A kind of aluminum alloy junction component multilayer two pass electric arc increasing material manufacturing method |
| CN107052520A (en) * | 2017-04-17 | 2017-08-18 | 北京航星机器制造有限公司 | A kind of single track electric arc, which is swung, increases the method that material shapes big wall thickness aluminum alloy junction component |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016224560A1 (en) * | 2016-12-09 | 2018-06-14 | Siemens Aktiengesellschaft | CMT technology with cored wire feed |
-
2018
- 2018-12-26 CN CN201811600451.3A patent/CN109530858B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014074379A1 (en) * | 2012-11-12 | 2014-05-15 | General Electric Company | Method for manufacturing rotary article by cold metal transfer welding deposition and rotary article as manufactured |
| CN105665878A (en) * | 2016-04-11 | 2016-06-15 | 南京埃斯顿机器人工程有限公司 | Space triangle swing welding method for welding arc-shaped welding seam through welding robot |
| CN106825859A (en) * | 2017-01-16 | 2017-06-13 | 北京航星机器制造有限公司 | A kind of aluminum alloy junction component multilayer two pass electric arc increasing material manufacturing method |
| CN107052520A (en) * | 2017-04-17 | 2017-08-18 | 北京航星机器制造有限公司 | A kind of single track electric arc, which is swung, increases the method that material shapes big wall thickness aluminum alloy junction component |
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