CN111922492A - Magnetic field-assisted integrated hot wire submerged arc welding device - Google Patents
Magnetic field-assisted integrated hot wire submerged arc welding device Download PDFInfo
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- CN111922492A CN111922492A CN202010802231.XA CN202010802231A CN111922492A CN 111922492 A CN111922492 A CN 111922492A CN 202010802231 A CN202010802231 A CN 202010802231A CN 111922492 A CN111922492 A CN 111922492A
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- 238000003466 welding Methods 0.000 title claims abstract description 246
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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
- B23K9/18—Submerged-arc 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
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
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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
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Abstract
The invention belongs to the technical field of welding equipment, and particularly relates to multi-wire submerged arc welding equipment. A magnetic field assisted integrated hot wire submerged arc welding device comprises a main gun body and an auxiliary gun body, wherein the auxiliary gun body is arranged at the rear end of the main gun body and used for feeding welding wires into the main gun body, and three wire feeding pipes are arranged in the main gun body in parallel along a welding bead direction; a first welding wire, a second welding wire and a third welding wire are respectively arranged in the three wire feeding pipes; the first welding wire and the second welding wire are respectively connected with an arc starting power supply and are used for arc starting with a workpiece; the third welding wire is connected with an auxiliary power supply and used for filling a welding seam after being heated by the auxiliary power supply; the front end of the main gun body is provided with a nozzle. The whole set of welding device is small in size, the electric arc formed by the three wires forms a coupling electric arc under the action of an external magnetic field, the heat input in the welding process is obviously reduced, the welding seam deposition rate is improved, crystal grains are refined, the burning loss of alloy elements is reduced, the internal stress of the welding seam is reduced, the welding deformation is avoided, the integral strength and toughness of the welding seam are obviously improved, and the welding seam with an ideal depth-to-width ratio is obtained.
Description
Technical Field
The invention belongs to the technical field of welding equipment, and particularly relates to multi-wire submerged arc welding equipment.
Background
Submerged arc welding is a method for welding by burning an electric arc under a flux layer, is highly favored by large-scale enterprises at home and abroad due to a series of advantages of high production efficiency, high welding seam quality, small welding deformation, no arc light, less smoke and the like, is mainly used in the fields of pressure vessels, railway vehicles, heavy machinery and the like, and is suitable for welding materials such as low-carbon steel, low-alloy steel, stainless steel, nickel-based alloy and the like. In recent years, domestic and foreign welding students research various high-efficiency and high-quality welding methods successively, but the application field of submerged arc welding is not greatly influenced.
At present, welding materials such as steel plates with the thickness of more than 80mm are applied more and more in the actual industry, and although the original single-wire submerged-arc welding and double-wire submerged-arc welding can realize the connection of thick plates, the multi-layer and multi-pass welding of the thick plates causes large heat input amount, so that the crystal grains of a welding seam structure are large, and the mechanical property of a joint is influenced. The multi-wire submerged arc welding is a submerged arc welding method which uses more than two welding wires to complete a welding seam, and is characterized in that required energy is distributed to different welding wires during welding, so that one-step forming of a welding bead can be realized by using thinner welding wires, smaller welding current and larger welding speed, preheating of front wires and preheating of rear wires can be considered between adjacent welding wires, in the actual welding process, required welding seam shapes and sizes can be obtained by adjusting the arrangement mode, the welding wire interval, the welding wire inclination angle, the electric arc power and the like between the welding wires, and the multi-wire submerged arc welding supplements each other, so that the welding production efficiency and the welding seam quality are obviously improved.
Integrated cold wire submerged arc welding (ICE)TM) A cold wire is inserted between two parallel hot wires, and the welding wire is melted by the redundant heat of the hot wires. During welding. Two hot wires are driven by a direct current motor to feed wires at the same speed, cold wires are fed by an independent wire feeder, and the wire feeding speed of the cold wires can be independently controlled. The method can greatly improve the welding production efficiency, increase the welding speed, reduce the consumption of the welding flux and realize the low-cost welding with high efficiency and high quality. However, the core technology of the method is limited in foreign countries, the equipment cost is high, and in addition, for a large thick plate, because of the consumption of a cold wire, part of welding heat input is generated, so that the welding process still needs multiple layers and multiple channels, and the welding efficiency is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide novel submerged arc welding equipment, wherein a welding wire which is not connected with a main power supply is added behind two welding wires which are connected with the main power supply and is used as a hot wire, the two welding wires in the front form an electric arc to preheat the welding wire at the rear, an additional independent power supply heats the welding wire, the two welding wires are melted by high temperature in a synergistic manner, the integrated hot wire function is realized, the welding gun can achieve the minimum heat input under the same cladding efficiency, the deterioration of phase change of a welding seam tissue caused by high submerged arc welding heat input, high heating speed and local overheating is reduced, the submerged arc welding with high current and high welding speed is particularly important, the mechanical property of the joint tissue can be obviously improved, the welding seam deformation is reduced, and the product quality is improved.
The welding gun can achieve the minimum heat input under the same cladding efficiency, reduces the deterioration of phase change of a welding seam structure caused by high submerged arc welding heat input, high heating speed and local overheating, is particularly important for submerged arc welding of large current and rapid welding, can obviously improve the mechanical property of a joint structure, reduces the deformation of the welding seam and improves the product quality.
In order to achieve the purpose, the invention adopts the technical scheme that: a magnetic field assisted integrated hot wire submerged arc welding device comprises a main gun body and an auxiliary gun body, wherein the auxiliary gun body is arranged at the rear end of the main gun body and used for feeding a welding wire into the main gun body, and three wire feeding pipes are arranged in the main gun body in parallel along a welding direction; a first welding wire, a second welding wire and a third welding wire are respectively arranged in the three wire feeding pipes; the first welding wire and the second welding wire are respectively connected with an arc starting power supply and are used for arc starting with a workpiece; the third welding wire is connected with an auxiliary power supply and used for filling a welding seam after being heated by the auxiliary power supply; the front end of the main gun body is provided with a nozzle.
In a preferred embodiment of the present invention, the first bonding wire is connected to a dc power supply.
In a preferred embodiment of the present invention, the second welding wire is connected to a pulsed ac power source.
As another preferable mode of the present invention, a magnetic field generating device is provided on the outer side of the front part of the main gun body; the magnetic field generating device is connected with an alternating current power supply, and changes the deflection direction of the first welding wire arc through the periodic magnetic field direction change.
Further preferably, the wire feeding pipe of the third welding wire is a ceramic wire feeding pipe; the ceramic wire feeding pipe is provided with a hollow structure.
Preferably, the third welding wire is connected with an auxiliary power supply through a hot wire electrode, the hot wire electrode enters the hollow structure to be in contact with the third welding wire in the ceramic wire feeding pipe, and the welding wire passing through the two conductive blocks of the hot wire electrode is heated.
In a preferred embodiment of the present invention, the wire feeding pipes of the first and second welding wires are copper wire feeding pipes, and the arc starting power source contacts the wall of the copper wire feeding pipe through the electrode block to transmit the welding current to the welding wire inside the pipe.
In a preferred embodiment of the present invention, the auxiliary gun body includes a wire feeder and a wire feeding hose, the wire feeding hose is connected to the ends of the three wire feeding tubes, and the wire feeder feeds the three welding wires into the three wire feeding tubes through the wire feeding hose.
Further preferably, the wire feeding mechanism consists of three groups of wire feeding planetary wheels, and the three groups of wire feeding planetary wheels are arranged at equal intervals.
In a preferred embodiment of the present invention, an arc stabilizer is provided inside the nozzle.
Compared with the traditional submerged arc welding gun, the submerged arc welding gun has the following beneficial effects:
(1) the whole set of welding device is small in size, narrow-gap welding of a large thick plate can be achieved, each wire feeding device comprises a plurality of cross planet wheels, a forward feeding pulling force is generated on a welding wire, the long-distance wire feeding is guaranteed, and long-distance effective welding is achieved.
(2) The welding arc includes three in total: a first wire arc, a second wire arc, and a third wire arc. The first welding wire electric arc that produces by DC power supply is located the front end, and the key hole work piece obtains the penetration of different degree of depth, and can take place to deflect under the effect of additional magnetic field, solves electric arc magnetic blow scheduling problem to change the deflection range and the direction of deflection of electric arc through DC power supply's size and magnetic field direction, and then control electric arc welding's effective area, successfully solve key problems such as dark thick plate lateral wall does not fuse. The second welding wire electric arc generated by the middle pulse alternating current power supply mainly uses small current and large voltage to control the forming of the welding seam and the penetration, and the middle wire forms stable welding electric arc under the action of an external magnetic field, so that the smooth surface of the welding seam is obtained, and the forming of the welding seam is improved. The third welding wire mainly plays a role in filling the cover surface, the welding wire deposition speed is accelerated under the preheating effect of the auxiliary power supply, the cladding area is increased, and the welding speed is improved.
(3) The electric arc formed by the three wires under the action of the external magnetic field forms a coupling electric arc, so that the heat input in the welding process is obviously reduced, the welding seam deposition rate is improved, crystal grains are refined, the burning loss of alloy elements is reduced, the internal stress of the welding seam is reduced, the welding deformation is avoided, the overall strength and toughness of the welding seam are obviously improved, and the welding seam with an ideal depth-to-width ratio is obtained.
(4) Aiming at the large thick plate, the number of welding layers is obviously reduced due to the improvement of welding cladding efficiency and fusion depth, so that the consumption of welding flux is reduced, and the welding cost is obviously reduced on the basis of obtaining a smooth welding seam surface.
Drawings
FIG. 1 is a left side view of an integrated hot wire submerged arc welding apparatus with magnetic field assistance provided in accordance with an embodiment of the present invention;
FIG. 2 is a three-dimensional perspective view of an integrated hot wire submerged arc welding apparatus with magnetic field assistance provided by an embodiment of the present invention;
FIG. 3 is a half sectional view of a magnetic field assisted submerged arc welding apparatus for an integrated hot wire according to an embodiment of the present invention;
FIG. 4 is a schematic perspective view (left front direction) of the internal structure of the integrated hot wire submerged arc welding device with the aid of the magnetic field according to the embodiment of the present invention;
FIG. 5 is a schematic perspective view (right-back direction) of the internal structure of the integrated hot wire submerged arc welding device with the aid of the magnetic field according to the embodiment of the present invention;
FIG. 6 is a schematic structural view of a ceramic wire feed tube;
FIG. 7 is a schematic structural diagram of an insulating block;
FIG. 8 is a three-dimensional perspective view of an insulator block;
FIG. 9 is a schematic view of the structure of the insulating rubber pad;
FIG. 10 is a schematic diagram of a hot wire electrode configuration;
fig. 11 is a schematic structural view of an electrode block: a. a direct current electrode block and an alternating current electrode block;
FIG. 12 is a schematic view of the structure of the electromagnet housing;
FIG. 13 is a schematic view of an electromagnet coil;
in the figure, 1. nozzle; 2. an arc stabilizer; 3. an electrode insulating block; 4. an electromagnet housing; 5. an electromagnet control box; 6. an electromagnet coil; 7. a main gun body housing; 8. a direct current electrode block; 9. an alternating current electrode block; 10. an insulating rubber pad; 11. a hot wire electrode fixing block; 12. a hot wire electrode; 13. a first red copper wire feeding pipe; 14. a second red copper wire feeding pipe; 15. a ceramic wire feeding tube; 16. a fixed block at the tail end of the main gun body; 17. an auxiliary gun body shell; 18. a wire feeding hose fixing plate; 19. a cross planet wheel carrier plate; 20. a wire feed hose; 21. a cross planet wheel; 22. a hollow structure; 23. a conductive block; 24. an insulating rod.
Detailed Description
In order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and specific examples. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
As introduced in the background art, in order to improve the welding deposition rate and reduce the welding heat input, the invention adjusts the hot wire power supply, the rear wire is preheated by the auxiliary power supply during arc striking, the temperature control system enables the heating process to be slowly increased, and gradient temperature compensation exists, so that the arc striking process is more stable; the magnetic field that variable magnetic field direction's magnetic field generating device produced influences front and back welding wire, has improved and has melted deeply and melt wide, has reduced heat input, has improved and has melted covering efficiency, has guaranteed the mechanical properties and the shaping pleasing to the eye of welding seam, and equipment has installed the cross planet wheel additional moreover and has solved the unstable problem of long distance wire feed and make the welding seam quality further promote.
One embodiment provided by the invention is as follows: the external structure of the integrated hot wire submerged arc welding device under the assistance of the magnetic field is shown in figure 1 and mainly comprises a main gun body I and an auxiliary gun body II. The auxiliary gun body II is embedded with the main gun body I through a fixed block at the tail end of the main gun body. The lower part of the front side of the main gun body I is provided with a magnetic field generating device for generating a magnetic field.
Referring to fig. 1 and 2, the auxiliary gun body ii is located on the upper portion of the main gun body i, and includes an auxiliary gun body housing 17, a wire feeding hose 20 inside the auxiliary gun body housing, a wire feeding hose fixing plate 18, three sets of cross planetary wheels and related structural members.
The auxiliary gun body shell 17 is two identical parts, a cross planet wheel carrier plate 19 is embedded in the groove at the top, a wire feeding hose fixing plate 18 is arranged in the groove below the cross planet wheel carrier plate 19, and the lowest part of the auxiliary gun body shell 17 is connected with the main gun body I.
Referring to fig. 2, 3 and 4, the cross planetary wheel carrier plate 19 is used for determining the positions of three sets of cross planetary wheels 21 relative to each other, the cross planetary wheel motor is fixed below the cross planetary wheel carrier plate 19 through four positioning screws, and the three sets of cross planetary wheels 21 are arranged at equal intervals relative to each other. The lower part of the integral structure of the cross planetary wheel 21, which is separated by 8.7mm, is provided with a wire feeding hose fixing plate 18, which is also fixed by a groove in the shell of the corresponding auxiliary gun body, three wire through holes on the upper surface of the wire feeding hose fixing plate 18 are funnel-shaped and parallel to the wire outlet hole of the cross planetary wheel, and a threaded hole is arranged below the wire through hole and is used for connecting a wire feeding hose 20. Three wire feeding pipes are arranged below the wire feeding hose fixing plate 18. The wire feeding pipes on the two sides are respectively connected with the cross planetary gear through wire feeding hoses 20, and the wire feeding pipe in the middle directly penetrates through a hole in the middle of the wire feeding hose fixing plate 18 to be connected with the cross planetary gear.
The wire feeding mechanism provides stability for the welding process, the requirement of long-distance wire feeding is met, welding wires enter the cross planetary gear reduction box through an external wire feeding hose, sequentially pass through all structural components inside the cross planetary gear 21 and finally enter the wire feeding hose fixing plate 18, and the straightened welding wires respectively enter different wire feeding pipes through the wire feeding hoses.
Referring to fig. 2, 3, 4 and 5, the main gun body includes a main gun body housing 7 and an internal arc generating system and hot wire system. The uppermost end of the main gun body shell 7 is provided with a main gun body tail end fixing block 16. As the connecting part of the main gun body and the auxiliary gun body, the protruding blocks at the two sides of the fixed block 16 at the tail end of the main gun body are embedded in the corresponding grooves in the shell 17 of the auxiliary gun body. And the vertical surface of the tail fixing block is provided with through holes for the three wire feeding pipes to pass through and through holes for the external power supply cables to pass through.
Three parallel wire feeding pipes, namely a first red copper wire feeding pipe 13, a second red copper wire feeding pipe 14 and a ceramic wire feeding pipe 15, are arranged in the main gun body shell 7. The distance between the three wire feeding pipes is 13.75mm, wherein the first red copper wire feeding pipe 13 is responsible for transporting the first welding wire, and the second red copper wire feeding pipe 14 is responsible for transporting the second welding wire; the ceramic wire feed tube 15 is responsible for transporting the third welding wire.
The first red copper wire feeding pipe 13 is connected with a direct current power supply through a direct current electrode block 8, and the second red copper wire feeding pipe 14 is connected with a pulse alternating current power supply through an alternating current electrode block 9. The ceramic wire feeding tube 15 is provided with a hollow 22, and as shown in fig. 6, the third welding wire is brought into contact with the hot wire electrode 12 through the hollow 22. The insulating property of the ceramic wire feeding tube 15 allows the auxiliary power supply to be connected to the hot wire electrode 12 inside the welding gun without short circuit, and the welding wire between the positive and negative electrodes of the hot wire electrode 12 is thermally heated by the resistance of the welding wire.
The front end of the main gun body housing 7 is the nozzle 1. The nozzle 1 is internally provided with a high-temperature-resistant insulated arc stabilizer 2, welding wires entering the three wire feeding pipes are finally fed into the arc stabilizer 2, and the arc is stabilized by the arc stabilizer 2 after arcing.
The three wire feeding pipes sequentially pass through the main gun body tail end fixing block 16, the hot wire electrode fixing block 11, the insulating rubber mat 10, the electrode insulating block 3 and the arc stabilizer 2 from top to bottom, and all the materials are insulating materials, so that the welding wires are prevented from being connected with the gun body.
The electrode insulator block 3 contains two grooves, as shown in fig. 7, for holding a dc electrode block 8 and an ac electrode block 9 and preventing the electrodes from being electrically connected to the gun body. The central area of the electrode insulation block 3 is provided with a hole for the three wire feeding pipes to pass through, and as shown in fig. 8, an insulation rubber pad 10 is arranged above the hole for fixing the positions of the three wire feeding pipes.
The structure of the insulating rubber mat 10 is shown in fig. 9, a hot wire electrode fixing block 11 is arranged above the insulating rubber mat 10, the hot wire electrode fixing block 11 is arranged in a groove inside the main gun body shell 7, the lower surface of the hot wire electrode fixing block is in contact with the upper surface of the insulating rubber mat 10, and a groove matched with the hot wire electrode 12 is arranged on the hot wire electrode fixing block 11 and used for fixing the hot wire electrode 12 and insulating the hot wire electrode 12 from the gun body.
The middle of the hot wire electrode 12 is provided with an insulating solid plastic rod 24 which is connected with an upper conductive block and a lower conductive block 23 made of metal copper through screws, as shown in figure 10, the whole hot wire electrode 12 is used as the hot wire electrode and is respectively connected with the upper conductive block and the lower conductive block through external auxiliary power supply leads, current flows through the welding wires, and the welding wires between the two conductive blocks are preheated through resistance heat.
The direct current electrode block 8 and the pulse alternating current electrode block 9 fixed on the electrode insulation block 3 are tightly attached to the first red copper wire feeding pipe 13 and the second red copper wire feeding pipe respectively, so that the welding current is completely transmitted to the first welding wire and the second welding wire. The structure of the direct current electrode block 8 is similar to that of the alternating current electrode block, and as shown in fig. 11a and 11b, the direct current electrode block is tightly attached to the outer wall of the red copper wire feeding pipe through a U-shaped groove on the electrode block.
And the third welding wire entering the ceramic wire feeding pipe 15 contacts with the hot wire electrode 12 through the hollowed-out position on the ceramic wire feeding pipe 15 after passing through the main gun body tail end fixing block 16, is preheated by the auxiliary power supply to become a hot wire, then sequentially passes through the hot wire electrode fixing block 11, the insulating rubber pad 10, the electrode insulating block 3 and the arc stabilizer 2 in the ceramic wire feeding pipe 15, and finally the preheated hot wire directly enters a molten pool made of two welding wires in front and is melted into a filler metal under the action of arc heat generated by the main arc of the first welding wire to participate in welding reaction.
The nozzle 1 is fixed at the front end of the main gun body shell 7 through screws. The electromagnet control box 5 is fixed at the upper position of the main gun body shell 7 connected with the nozzle 1, and the lower end is connected with the electromagnet shell 4, as shown in figure 12, the electromagnet coil 6 is protected. The electromagnet coil 6 is located inside the electromagnet housing 4, as shown in fig. 13, and the electromagnet coil 6 is connected to an alternating current power supply. When energized, the electromagnet coil 6 forms a magnetic field in the left-right direction in front of the first welding wire.
The electromagnet coil 6 works all the time in the whole welding process, the electric arc generated by the first welding wire connected with the direct current power supply at the foremost end of the welding bead is controlled by adjusting the parameters of the electromagnet control box 5, the frequency and the direction of the electric arc swing are changed, and meanwhile, the electric arc swing amplitude is changed by adjusting the parameters of the direct current power supply, so that the large fusion width and the high fusion covering efficiency of the welding are ensured.
The magnetic field assisted integrated hot wire submerged arc welding device of the embodiment contains a first welding wire, a second welding wire and a third welding wire (hot wire) inside, and each welding wire is provided with an independent welding power supply. During welding, the three welding wires are arranged in parallel in the front-back direction of the welding bead to realize welding along the welding direction, the first welding wire can be perpendicular to a welding workpiece or inclined forwards to form an included angle of 20-80 degrees with the workpiece, the third welding wire (hot wire) is usually inclined backwards to form an included angle of 30-80 degrees with the workpiece, and the second welding wire can be perpendicular to the workpiece to weld or form a certain angle with the workpiece.
The first welding wire is connected with a direct current power supply, the second welding wire is connected with a pulse alternating current power supply, and the third welding wire is connected with an auxiliary power supply. The weld penetration of the weld joint is controlled by controlling the current of the first welding wire, the second welding wire plays a role in further increasing the weld penetration and improving the weld bead formation, and the third welding wire (hot wire) can preheat the welding wire through an auxiliary power supply, so that the melting speed of the welding wire is increased, and the welding speed is increased. The auxiliary power supply can be a direct current power supply or an alternating current power supply.
The electromagnet coil 6 periodically changes the polarity of the electromagnet under the action of the alternating current power supply. The arc that the first welding wire in the place ahead produced is under the effect of magnetic field, realize the periodic deviation, the arc is similar to the welder swing but the heat input of more direct influence welding region about the periodic deviation, guaranteed to reduce the penetration and increased the cladding area under the prerequisite of not changing the electric current like this, can control the arc swing range through the control to electromagnet current power, the area of effective area and welding seam district and the heat affected zone of control arc welding, it has apparent effect on refining the crystalline grain to reduce the heat input, and because the shaping that first arc brought is unsightly and the problem that the penetration reduces can be improved by two follow-up welding wires.
The second welding wire in the middle mainly controls the forming of the welding line and further improves the penetration with the undercurrent and the large voltage, the power adopts an alternating current pulse power, when the arc current is in a peak value interval, the welding wire current is zero, the magnetic blow can not be generated at the moment, when the welding wire is electrified, the arc base value current is very small, the arc combustion can only be maintained, the welding wire is electrified to generate a magnetic field and further generate ampere force to pull the arc, but the arc base value current is very small, the adverse effect can not be caused to the base metal, therefore, the welding wire in the middle can stabilize the arc, the smooth surface of the welding line is obtained, and the forming of the welding.
The third welding wire (hot wire) at the rear is used as a filler metal, the cladding area is increased, the melting speed of the welding wire is fast enough under the assistance of an external power supply, the welding speed can be greatly improved, the actual heat input of the whole welding process is reduced, the burning loss of alloy elements is reduced, the internal stress of a welding seam is reduced, and the crystal grains are refined, so that the integral strength and toughness of the welding seam are obviously improved.
The magnetic field-assisted integrated hot wire submerged arc welding device of the embodiment improves the distribution of a welding temperature field under the action of an external magnetic field, forms an integrated coupling arc, realizes high deposition rate welding with minimum heat input, avoids coarsening of a weld joint structure caused by overlarge heat input amount, obviously improves the mechanical property of a joint, reduces the deformation amount of the weld joint, and improves the quality of the weld joint. The synergistic effect of the external magnetic field and each electric arc is also important, and the fusion width and the fusion depth can be changed by controlling the shape of the electric arc on the basis of ensuring that the heat input is not increased.
Claims (10)
1. The utility model provides an integrated hot wire submerged arc welding device under magnetic field is supplementary, includes the main rifle body, assists the rifle body, assist the rifle body and set up the rear end at the main rifle body for send into the welding wire in the main rifle body, its characterized in that: three wire feeding pipes are arranged in the main gun body in parallel along the welding bead direction; a first welding wire, a second welding wire and a third welding wire are respectively arranged in the three wire feeding pipes; the first welding wire and the second welding wire are respectively connected with an arc starting power supply and are used for arc starting with a workpiece; the third welding wire is connected with an auxiliary power supply and used for filling a welding seam after being heated by the auxiliary power supply; the front end of the main gun body is provided with a nozzle.
2. The magnetic field assisted submerged arc welding apparatus with integrated hot wire according to claim 1, characterized in that: the first welding wire is connected with a direct current power supply.
3. The magnetic field assisted submerged arc welding apparatus with integrated hot wire according to claim 1, characterized in that: the second welding wire is connected with a pulse alternating current power supply.
4. The integrated hot wire submerged arc welding apparatus under magnetic field assistance of claim 2, characterized in that: a magnetic field generating device is arranged on the outer side of the front part of the main gun body; the magnetic field generating device is connected with an alternating current power supply, and changes the deflection direction of the first welding wire arc through the periodic magnetic field direction change.
5. The magnetic field assisted submerged arc welding apparatus with integrated hot wire according to claim 1, characterized in that: the wire feeding pipe of the third welding wire is a ceramic wire feeding pipe; the ceramic wire feeding pipe is provided with a hollow structure.
6. The integrated hot wire submerged arc welding apparatus under magnetic field assistance of claim 5, characterized in that: the third welding wire is connected with an auxiliary power supply through a hot wire electrode, the hot wire electrode enters the hollow structure to be in contact with the third welding wire in the ceramic wire feeding pipe, and the welding wire passing through the two conductive blocks of the hot wire electrode is heated.
7. The magnetic field assisted submerged arc welding apparatus with integrated hot wire according to claim 1, characterized in that: the wire feeding pipes of the first welding wire and the second welding wire are red copper wire feeding pipes, and the arc starting power supply is in contact with the pipe walls of the red copper wire feeding pipes through the electrode blocks to transmit welding current to the welding wires in the pipes.
8. The magnetic field assisted submerged arc welding apparatus with integrated hot wire according to claim 1, characterized in that: the auxiliary gun body comprises a wire feeding mechanism and a wire feeding hose, the wire feeding hose is connected to the tail ends of the three wire feeding pipes, and the wire feeding mechanism feeds three welding wires into the three wire feeding pipes through the wire feeding hose respectively.
9. The integrated hot wire submerged arc welding apparatus under magnetic field assistance of claim 8, characterized in that: the wire feeding mechanism consists of three groups of wire feeding planetary wheels which are arranged at equal intervals.
10. The magnetic field assisted integrated hot wire submerged arc welding apparatus of claim 9, wherein an arc stabilizer is disposed within the nozzle.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118237701A (en) * | 2024-02-28 | 2024-06-25 | 江苏旭美特环保科技有限公司 | Argon arc welding machine for intelligent floor washing machine production and manufacture |
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| CN111922492B (en) | 2024-07-05 |
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