CN101264547A - Tungsten electrode-consuming electrode indirect electric arc welding device and its welding method - Google Patents
Tungsten electrode-consuming electrode indirect electric arc welding device and its welding method Download PDFInfo
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- CN101264547A CN101264547A CNA2008100644569A CN200810064456A CN101264547A CN 101264547 A CN101264547 A CN 101264547A CN A2008100644569 A CNA2008100644569 A CN A2008100644569A CN 200810064456 A CN200810064456 A CN 200810064456A CN 101264547 A CN101264547 A CN 101264547A
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Abstract
The invention relates to an indirect arc welding device between tungsten electrode and melting electrode and a welding method thereof, belonging to the technical field of material welding device and welding method, which is used to solve the problems in the prior arc welding devices, such as high hot input, low weld joint deposited ratio and high dilution ratio. The two ends of the welding wire are respectively connected with a wire feeder and a melting electrode welding torch, and exposed outside of the conductive mouth of the melting electrode welding torch. The welding wire is connected with a power supply, and the tungsten electrode welding torch and the melting electrode welding torch are connected respectively with the positive and negative electrodes of GTAW, and the axial point of the two welding torches is on the top of the weldment to be welded, and two protection gas cylinders are connected respectively with the protection gas inlets. Based on the device to weld in a certain welding process, turning on the arc generating switch, and using arc only generated between the tungsten electrode and melting electrode to quickly heat to melt the welding wire, and the droplet of the melted welding wire with heat heats the device indirectly and welds. The welding method has the advantages that the weld joint deposited ratio is increased up to 50g/min and the dilution ratio is controlled within 5%.
Description
Technical field
The invention belongs to material welder and welding method thereof.
Background technology
Traditional arc welding connects power supply with the workpiece mother metal, and the hot input quantity of workpiece mother metal is big, the weld deposit rate is low, dilution rate is high.In traditional electrical arc-welding welding process, electric arc burns between welding wire and workpiece, and electric arc directly heats workpiece, and firing rate is fast, fusion penetration is big.The workpiece mother metal causes the input of workpiece mother metal heat to increase as an electrode of electric arc, and the fusing amount is many, and consumed power is also many.When built-up welding or the welding of two foreign materials,, thereby influence welding quality if use traditional arc welding certainly will cause melting mutually in a large number between different materials.As at surface of steel plate surfacing of Cu alloy, use traditional arc welding method can make the ferro element in the steel plate fuse into the copper alloy overlay cladding in a large number, general iron phenomenon occurs, thereby increase the fragility of overlay cladding, reduce its serviceability.When using conventional arc welding method welding foreign material magnalium material for another example,, electric arc generates compound between a large amount of brittle metals because to the direct effect of workpiece, making magnalium melt mutually.
Summary of the invention
The objective of the invention is to solve traditional arc welding the workpiece mother metal is connect power supply, the problem that the hot input quantity of workpiece mother metal is big, the weld deposit rate is low, dilution rate is high designs a kind of device and welding method thereof of tungsten electrode-consuming electrode indirect electric arc welding.
The present invention is by GTAW (Gas Tungsten Arc Welding; gas tungstun arc welding) power supply; wire-feed motor; the tungsten electrode welding gun; melting pole gun; welding wire and protection gas cylinder are formed; wire-feed motor links to each other with an end of welding wire; the other end of welding wire passes the inner chamber of melting pole gun and is exposed at outside the ignition tip of melting pole gun; welding wire connects; the power connection end of tungsten electrode welding gun and melting pole gun links to each other with the both positive and negative polarity of GTAW power supply respectively; the crossing point of axes of tungsten electrode welding gun and melting pole gun is positioned at treats the weldment top, and the gas output end of two protection gas cylinders communicates with the protection gas inlet of tungsten electrode welding gun and melting pole gun respectively.
The step that is used for the welding method that said apparatus implements is as follows:
Step 1: the position to be welded of workpiece is processed into groove, crimping as required or does not handle;
Step 2: be fixed on the anchor clamps workpiece to be welded;
Step 3: the angle between maintenance tungsten electrode welding gun and the melting pole gun is between 30 °-90 °; The tungsten electrode wedge angle end points of tungsten electrode welding gun from the distance of the end points of welding wire between 2mm-5mm; The distance of two welding gun crossing point of axes and surface of the work is at 5mm-16mm;
Step 4: set technological parameter, welding current is between 20A-180A; Wire feed rate is between the 2.0m/min-12m/min: tungsten electrode welding gun gas flow is between 10L/min-20L/min; The melting pole gun gas flow is between 0-20L/min; The stem elongation degree of welding wire is between 15mm-25mm; The diameter of welding wire is between 1.0mm-1.6mm; Speed of welding is between 18cm/min-30cm/min; The tungsten electrode diameter is between 1.6mm-2mm;
Step 5: start the GTAW power supply, start the striking switch, electric arc only produces between the tungsten electrode of tungsten electrode welding gun and the welding wire that stretches out from the melting pole gun ignition tip, utilizes arc heat Fast Heating filler wire, the molten drop that filler wire forms carries heat indirect workpiece, implements welding.
Advantage of the present invention is:
1, power supply does not connect workpiece, and surface of the work does not have electric arc and directly heats, and has reduced the hot input quantity of workpiece;
2, improved the burn-off rate of welding wire, improved the deposition rate of welding point, deposition rate can reduce the weld seam dilution rate up to 50g/min, and the weld seam dilution rate is controlled in 5%, has improved welding productivity, has guaranteed welding quality;
3, the droplet transfer stable, continuously, droplet size evenly and have good directive property, welding procedure is stable and have very strong welding adaptability, has guaranteed welding quality;
4, the mutual melt of workpiece and welding wire deposited metal obviously reduces;
5, this system architecture is simple, and welding procedure is stable, can be widely used in deposition rate requirement height, between welding wire and the mother metal mutually melt require few welding point, as the electric arc micro-melting brazing between surface overlaying or dissimilar materials etc.;
6, apparatus of the present invention can realize that by adding the melting pole gun of transforming make simply, technological parameter is regulated flexibly fast, and is easy to operate on traditional GTAW welding system basis.
Description of drawings
Fig. 1 is the structural representation of the inventive method device therefor, Fig. 2 is the schematic diagram that the present invention carries out built-up welding, Fig. 3 is the schematic diagram of the present invention's crimping butt welding when welding heterogeneous thin plate, Fig. 4 is the schematic diagram of the present invention's bevel butt welding when welding heterogeneous slab, Fig. 5 uses the face of weld shape appearance figure of the copper alloy welding wire of welding method enforcement of the present invention at steel matrix surface overlaying joint, and Fig. 6 uses the section of weld joint shape appearance figure of the copper alloy welding wire of welding method enforcement of the present invention at steel matrix surface overlaying joint.
The specific embodiment
The specific embodiment one: present embodiment is described below in conjunction with Fig. 1; present embodiment is by GTAW power supply 1; wire-feed motor 2; tungsten electrode welding gun 3; melting pole gun 4; welding wire 5 and protection gas cylinder 6 are formed; wire-feed motor 2 links to each other with an end of welding wire 5; the other end of welding wire 5 passes the inner chamber of melting pole gun 4 and is exposed at outside the ignition tip of melting pole gun 4; welding wire 5 connects; the power connection end of tungsten electrode welding gun 3 and melting pole gun 4 links to each other with the both positive and negative polarity of GTAW power supply 1 respectively; the crossing point of axes of tungsten electrode welding gun 3 and melting pole gun 4 is positioned at treats the weldment top, and the gas output end of two protection gas cylinders 6 communicates with the protection gas inlet of tungsten electrode welding gun 3 and melting pole gun 4 respectively.
The specific embodiment two: present embodiment is based on the welding method of the device enforcement of embodiment one, and welding step is as follows:
Step 1: the position to be welded of workpiece 7 is processed into groove, crimping as required or does not handle;
Step 2: be fixed on the anchor clamps workpiece 7 to be welded;
Step 3: the angle between maintenance tungsten electrode welding gun 3 and the melting pole gun 4 is between 30 °-90 °; The tungsten electrode wedge angle end points of tungsten electrode welding gun 3 from the distance of the end points of welding wire 5 between 2mm-5mm; The distance on two welding gun crossing point of axes and workpiece 7 surfaces is at 5mm-16mm;
Step 4: set technological parameter, welding current is between 20A-180A; Wire feed rate is between the 2.0m/min-12m/min: the gas flow of tungsten electrode welding gun 3 is between 10L/min-20L/min; The gas flow of melting pole gun 4 is between 0-20L/min; The stem elongation degree of welding wire 5 is between 15mm-25mm; The diameter of welding wire 5 is between 1.0mm-1.6mm; Speed of welding is between 18cm/min-30cm/min; The tungsten electrode diameter is between 1.6mm-2mm;
Step 5: start GTAW power supply 1, start the striking switch, 8 on electric arc produces between the tungsten electrode of tungsten electrode welding gun 3 and the welding wire 5 that stretches out from melting pole gun 4 ignition tips, utilize the heat Fast Heating filler wire 5 of electric arc 8, the molten drop 9 that filler wire 5 forms carries heat indirect workpiece 7, implements welding.
The specific embodiment three: provide a specific embodiment, with method welding of the present invention, as shown in Figure 2.Technology is as follows: the workpiece 7 that is adopted is the 30CrMnSi structural steel of thickness 3mm, and welding wire 5 compositions are CuSi3Mn, and welding wire 5 diameters are 1.0mm.Use the surface, position to be welded of stainless steel brush buffing work-piece 7, remove iron rust.Adopt special fixture that workpiece 7 is positioned.Use acetone cleaning workpiece 7, remove greasy dirt and impurity, dry back is to be welded.Tungsten electrode welding gun 3 and melting pole gun 4 are connected respectively to the both positive and negative polarity of GTAW power supply 1, keep 45 ° of two welding gun angles, the wedge angle end points portion of tungsten electrode welding gun 3 is 4mm from the distance of welding wire 5, and the distance on two welding gun crossing point of axes and workpiece 7 surfaces is 11mm.Set technological parameter: welding current 130A; Wire feed rate 6.7m/min; The protection gas that tungsten electrode welding gun 3 feeds is Ar gas, and gas flow is 15L/min, and the protection gas that melting pole gun 4 feeds is Ar gas, and gas flow is 20L/min; The stem elongation degree of welding wire 5 is 18mm; The diameter of welding wire 5 is 1.0mm; Speed of welding is 24cm/min; The tungsten electrode diameter is 2mm.Open the striking switch, make electric arc 8 smooth combustion between welding wire 5 and tungsten electrode, utilize the heat melts welding wire 5 of electric arc 8, utilize the heat of molten drop 9 to pass to workpiece 7 enforcement welding again, postwelding joint dilution rate is 4.3%, the appearance of weld seam 10 such as Fig. 5, shown in Figure 6.By this example as can be known, this method can effectively reduce the mutual melt between welding wire 5 and the workpiece 7, obviously reduces the joint dilution rate.Utilize this process characteristic to can be used for the butt welding of heterogeneous light sheet material crimping, see Fig. 3; Simultaneously also can be used for the butt welding of heterogeneous slab material bevel, see Fig. 4.A, B represent two kinds of materials respectively among the figure.
The specific embodiment four: present embodiment is that with embodiment two differences welding method of the present invention is applicable to being connected of surface overlaying and foreign material, and other is identical with embodiment two.
The specific embodiment five: present embodiment and embodiment two differences are to keep angle between tungsten electrode welding gun 3 and the melting pole gun 4 between 40 °-80 °; Tungsten electrode welding gun 3 is placed with respect to the face left-right symmetry vertical with horizontal plane with melting pole gun 4, and other is identical with embodiment two.
The specific embodiment six: present embodiment and embodiment two differences are that the welding wire welding current of AlSi3Mn material is 80A-130A; The welding wire welding current of CuSi3Mn material is 100A-150A; The welding wire welding current of ZnAl material is 40A-70A, and other is identical with embodiment two.
The specific embodiment seven: present embodiment and embodiment two differences are that the wire feed rate of AlSi3Mn material welding wire is 4.5m/min-8.5m/min; The wire feed rate of CuSi3Mn material welding wire is 5.5m/min-10m/min; The wire feed rate of ZnAl material welding wire is 2.5m/min-7.0m/min, and other is identical with embodiment two.
The specific embodiment eight: between 2mm-3mm, other is identical with embodiment two from the distance of welding wire 5 end points for the tungsten electrode wedge angle end points that present embodiment and embodiment two differences are tungsten electrode welding gun 3.
The specific embodiment nine: present embodiment and embodiment two differences are the distance on surface of two welding gun crossing point of axes and workpiece 7 at 7mm-12mm, and other is identical with embodiment two.
The specific embodiment ten: present embodiment and embodiment two differences are that the gas flow of tungsten electrode welding gun 3 is between 13L/min-18L/min; The gas flow of melting pole gun 4 is between 0-15L/min, and other is identical with embodiment two.
The specific embodiment 11: the stem elongation degree that present embodiment and embodiment two differences are welding wire 5 is between 18mm-22mm, and other is identical with embodiment two.
The specific embodiment 12: the diameter that present embodiment and embodiment two differences are welding wire 5 is between 1.2mm-1.5mm, and other is identical with embodiment two.
The specific embodiment 13: present embodiment and embodiment two differences are speed of welding between 19cm/min-25cm/min, and other is identical with embodiment two.
Claims (10)
1; the device of tungsten electrode-consuming electrode indirect electric arc welding and welding method thereof; it is characterized in that it is by GTAW power supply (1); wire-feed motor (2); tungsten electrode welding gun (3); melting pole gun (4); welding wire (5) and protection gas cylinder (6) are formed; wire-feed motor (2) links to each other with an end of welding wire (5); the other end of welding wire (5) passes the inner chamber of melting pole gun (4) and is exposed at outside the ignition tip of melting pole gun (4); welding wire (5) connects; the power connection end of tungsten electrode welding gun (3) and melting pole gun (4) links to each other with the both positive and negative polarity of GTAW power supply (1) respectively; the crossing point of axes of tungsten electrode welding gun (3) and melting pole gun (4) is positioned at treats the weldment top, and the gas output end of two protection gas cylinders (6) communicates with the protection gas inlet of tungsten electrode welding gun (3) and melting pole gun (4) respectively.
2, implement the welding method of tungsten electrode-consuming electrode indirect electric arc welding with the device of claim 1, it is characterized in that welding step is as follows:
Step 1: the position to be welded of workpiece (7) is processed into groove, crimping as required or does not handle;
Step 2: be fixed on the anchor clamps workpiece (7) to be welded;
Step 3: the angle between maintenance tungsten electrode welding gun (3) and the melting pole gun (4) is between 30 °-90 °; The tungsten electrode wedge angle end points of tungsten electrode welding gun (3) from the distance of welding wire (5) end points between 2mm-5mm; The distance on two welding gun crossing point of axes and workpiece (7) surface is at 5mm-16mm;
Step 4: set technological parameter, welding current is between 20A-180A; Wire feed rate is between the 2.0m/min-12m/min: the gas flow of tungsten electrode welding gun (3) is between 10L/min-20L/min; The gas flow of melting pole gun (4) is between 0-20L/min; The stem elongation degree of welding wire (5) is between 15mm-25mm; The diameter of welding wire (5) is between 1.0mm-1.6mm; Speed of welding is between 18cm/min-30cm/min; The tungsten electrode diameter is between 1.6mm-2mm;
Step 5: start GTAW power supply (1), start the striking switch, electric arc (8) only produces between the tungsten electrode of tungsten electrode welding gun (3) and the welding wire (5) that stretches out from melting pole gun (4) ignition tip, utilize the heat Fast Heating filler wire (5) of electric arc (8), the molten drop (9) that filler wire (5) forms carries heat indirect workpiece (7), implements welding.
3, the welding method of tungsten electrode-consuming electrode indirect electric arc welding according to claim 2 is characterized in that it is applicable to being connected of surface overlaying and foreign material.
4, the welding method of tungsten electrode-consuming electrode indirect electric arc welding according to claim 2 is characterized in that in the step 2 keeping angle between tungsten electrode welding gun (3) and the melting pole gun (4) between 40 °-80 °; Tungsten electrode welding gun (3) is placed with respect to the face left-right symmetry vertical with horizontal plane with melting pole gun (4).
5, the welding method of tungsten electrode-consuming electrode indirect electric arc welding according to claim 2, the welding wire welding current that it is characterized in that AlSi3Mn material in the step 4 is 80A-130A; The welding wire welding current of CuSi3Mn material is 100A-150A; The welding wire welding current of ZnAl material is 40A-70A.
6, the welding method of tungsten electrode-consuming electrode indirect electric arc welding according to claim 2, the wire feed rate that it is characterized in that AlSi3Mn material welding wire in the step 4 is 4.5m/min-8.5m/min; The wire feed rate of CuSi3Mn material welding wire is 5.5m/min-10m/min; The wire feed rate of ZnAl material welding wire is 2.5m/min-7.0m/min.
7, the welding method of tungsten electrode-consuming electrode indirect electric arc welding according to claim 2, the tungsten electrode wedge angle end points that it is characterized in that tungsten electrode welding gun (3) in the step 2 from the end-point distances of welding wire (5) between 2mm-3mm.
8, the welding method of tungsten electrode-consuming electrode indirect electric arc welding according to claim 2, the distance that it is characterized in that the surface of two welding gun crossing point of axes and workpiece (7) in the step 2 is at 7mm-12mm.
9, the welding method of tungsten electrode-consuming electrode indirect electric arc welding according to claim 2, the gas flow that it is characterized in that tungsten electrode welding gun (3) in the step 4 is between 13L/min-18L/min; The gas flow of melting pole gun (4) is between 0-15L/min.
10, the welding method of tungsten electrode-consuming electrode indirect electric arc welding according to claim 2 is characterized in that speed of welding is between 19cm/min-25cm/min in the step 4.
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Open date: 20080917 |