Strong magnetic space electric arc welding construction method

Abstract

The invention relates to the technical field of welding operation, in particular to a strong magnetic space electric arc welding construction method which comprises the following steps: planning a welding area; a magnetic field deviation rectifying device is installed on the gun head and comprises an installation base, two first magnetic claws are arranged in the X-axis direction, and two second magnetic claws are arranged in the Y-axis direction; the two first magnetic claws and the two second magnetic claws have different magnetic poles; coils are wound on the first magnetic claw and the second magnetic claw; the first power supply is connected in series with the coils on the two first magnetic claws through a first wire to form a first loop; the second power supply is connected in series with the coils on the two second magnetic claws through a second wire to form a second loop; voltage and current of the first loop and the second loop are adjusted, and arc offset is avoided; welding operation is conducted; the coil generates a magnetic field after being electrified, and then the first magnetic claw and the second magnetic claw restrain the generated magnetic field, so that the restrained magnetic field is counteracted with an original environment magnetic field, and the arc is prevented from deviating due to the effect of the original environment magnetic field.

Description

Technical Field

[0001] The invention relates to the technical field of welding operations, in particular to a strong magnetic space arc welding construction method. Background Art

[0002] In the maintenance project of aluminum electrolysis workshop, the construction site is filled with strong magnetic fields, which belongs to a strong magnetic environment. When component welding operations are carried out in this environment, the electrons of the welding arc are affected by the Lorentz force in the chaotic strong magnetic environment, which will change the movement trajectory of the electrons, causing the welding arc to be offset and difficult to control; the welding material melted by the arc transitions to the welding molten pool, and the transition method is also affected by the magnetic field environment; the morphology and form of the molten pool metal are also affected by the chaotic strong magnetic environment; therefore, how to avoid the influence of the original magnetic field of the environment on the welding construction is an urgent problem that technical personnel in this field need to solve. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a strong magnetic space arc welding construction method which can avoid the influence of the original magnetic field of the environment on the welding construction and improve the welding quality in a strong magnetic environment.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A strong magnetic space arc welding construction method comprises the following steps: S1: Plan the welding area in the electrolysis workshop at the construction site; S2: A magnetic field correction device adapted to the size of the welding gun head is selected and clamped on the welding gun head, wherein the welding gun head is arranged along the Z-axis direction, and the magnetic field correction device includes a mounting seat that can be clamped on the welding gun head, and two first magnetic claws are arranged on the mounting seat along the X-axis direction, and two second magnetic claws are arranged along the Y-axis direction; the two first magnetic claws have different magnetic poles, and the two second magnetic claws have different magnetic poles, the first magnetic claw and the second magnetic claw are both arranged perpendicular to the mounting seat, and the plane where the two first magnetic claws are located is perpendicular to the plane where the two second magnetic claws are located; coils are wound around the first magnetic claw and the second magnetic claw; S3: The first power source is connected in series with the coils on the two first magnetic claws through a first wire to form a first loop, and the second power source is connected in series with the coils on the two second magnetic claws through a second wire to form a second loop; S4: Test welding is performed in the planned welding area. During the test welding, the voltage and current of the first circuit and the second circuit are adjusted until the test welding arc does not deviate in the horizontal direction; S5: Adjust the parameters of the first and second circuits during the trial welding and perform welding operations. Clean them after cooling, and perform non-destructive testing on the welding interface to check the welding quality.

[0005] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: The device generates a magnetic field through the coil after power is supplied, and then the first magnetic claw and the second magnetic claw constrain the generated magnetic field so that the constrained magnetic field is offset with the original environmental magnetic field, thereby preventing the arc from being deviated by the original environmental magnetic field, and improving the welding quality in a strong magnetic environment.

[0006] Preferably, a further technical solution of the present invention is: Preferably, the mounting base in step S2 includes a gun head connecting ring adapted to the welding gun head, an inner ring connecting arc plate is connected to the gun head connecting ring, an outer ring connecting arc plate is arranged on the outside of the gun head connecting ring, and the outer ring connecting arc plate is connected to the gun head connecting ring through a connecting plate; two first magnetic claws are arranged on the inner ring connecting arc plate, and two second magnetic claws are arranged on the outer ring connecting arc plate.

[0007] Preferably, in step S2, a sliding adjustment mechanism is further provided on the first magnetic claw and the second magnetic claw, each sliding adjustment mechanism comprises two legs, the two legs are respectively provided on the first magnetic claw or the second magnetic claw and located on both sides of the coil, a guide column is connected between the two legs, a paddle is slidably connected to the guide column, the end of the paddle is a pointed end, and the pointed end is in contact with the coil; a wire connection end is respectively provided on one end of the coil and the guide column, for connecting the first wire or the second wire; correspondingly, in step S4, when adjusting the voltage and current of the first loop and the second loop, the number of coil turns connected to the inside of the first loop and the second loop is adjusted specifically by sliding the paddle, that is, adjusting the resistance connected to the first loop and the second loop; the number of coil gates connected to the circuit can be adjusted by the position of the sliding paddle, so as to adjust the strength of the magnetic field in the first magnetic claw and the second magnetic claw.

[0008] Preferably, in step S2, after the mounting base is clamped and fixed on the welding gun head, the lowermost ends of the first magnetic claw and the second magnetic claw are flush with the end of the welding gun head or extend downward by 0.5-0.8mm from the end of the welding gun head, ensuring that the magnetic field generating area coincides with the welding space.

[0009] Preferably, in step S2, the lower ends of the first magnetic claw and the second magnetic claw are hooks, which hook downward toward one side of the welding gun head, and the extension lines of the hooks can intersect, with the intersection point located 3mm-5mm from the lower end of the welding gun head; ensuring that the magnetic field generating area completely covers the arc area.

[0010] Preferably, in step S2, the first magnetic claw and the second magnetic claw are made of low-carbon steel, and the coil is wound with enameled copper wire.

[0011] Preferably, in step S2, auxiliary legs are provided on the inner circle connecting arc plate on the side of the first magnetic claw and on the outer circle connecting arc plate on the side of the second magnetic claw, and the auxiliary legs are connected with water cooling pipes, which are connected to the cooling water tank through a circulating water pump; a large amount of heat will be generated during the arc welding process, and excessively high arc welding temperature will lead to reduced hardness and impact toughness of the welded parts; at the same time, heat will also be generated during the electromagnetism process, and overheating will damage components in the circuit; therefore, by adding a water cooling pipe to cool the welding area, the single welding time can be further increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the magnetic field correction device in use according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a magnetic field correction device in an embodiment of the present invention; Figure 3 2 is a schematic diagram of the side view structure of the welding magnetic field correction device in an embodiment of the present invention; Figure 4 This is a welding surface forming effect diagram when the magnetic field correction device is not provided in the embodiment of the present invention; Figure 5 This is a diagram showing the welding surface forming effect after a magnetic field correction device is provided in an embodiment of the present invention.

[0013] Explanation of the reference numerals: 1. welding gun head; 2. gun head connecting ring; 3. inner circle connecting arc plate; 4. outer circle connecting arc plate; 5. connecting plate; 6. first magnetic claw; 7. second magnetic claw; 8. coil; 9. first wire; 10. second wire; 11. sliding adjustment mechanism; 1101. support leg; 1102. guide column; 1103. pick; 12. hook. DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with specific embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0015] Embodiment 1: This embodiment provides a strong magnetic space arc welding construction method, comprising the following steps: S1: Plan the welding area in the electrolysis workshop at the construction site.

[0016] S2: Figure 1 , Figure 2A magnetic field correction device that matches the size of the welding gun head 1 is selected and clamped on the welding gun head 1, wherein the welding gun head 1 is arranged along the Z-axis direction, and the magnetic field correction device includes a mounting base that can be clamped on the welding gun head 1, and two first magnetic claws 6 are arranged on the mounting base along the X-axis direction, and two second magnetic claws 7 are arranged along the Y-axis direction; the two first magnetic claws 6 have different magnetic poles, and the two second magnetic claws 7 have different magnetic poles, that is, one of the two first magnetic claws 6 is N-level and the other is S-level, and one of the two second magnetic claws 7 is N-level and the other is S-level; the first magnetic claw 6 and the second magnetic claw 7 are both arranged perpendicular to the mounting base, and the plane where the two first magnetic claws 6 are located is perpendicular to the plane where the two second magnetic claws 7 are located; a coil 8 is wound around the first magnetic claw 6 and the second magnetic claw 7; wherein the first magnetic claw 6 and the second magnetic claw 7 are made of Q235 low-carbon steel, and the coil 8 is made of 400 turns of copper wire with enameled wire of 1 mm in diameter.

[0017] The mounting seat includes a gun head connecting ring 2 adapted to the welding gun head 1, an inner ring connecting arc plate 3 is connected to the gun head connecting ring 2, an outer ring connecting arc plate 4 is arranged on the outer side of the gun head connecting ring 2, and the outer ring connecting arc plate 4 is connected to the gun head connecting ring 2 through a connecting plate 5; two first magnetic claws 6 are arranged on the inner ring connecting arc plate 3, and two second magnetic claws 7 are arranged on the outer ring connecting arc plate 4; wherein, in order to ensure lightweight and non-magnetic conductivity, the gun head connecting ring 2, the inner ring connecting arc plate 3, the outer ring connecting arc plate 4, and the connecting plate 5 are all made of aluminum alloy.

[0018] like Figure 3 After the mounting base is clamped and fixed on the welding gun head 1, the lower ends of the first magnetic claw 6 and the second magnetic claw 7 are flush with the end of the welding gun head 1 or extend downward by 0.5-0.8mm from the end of the welding gun head 1; the lower ends of the first magnetic claw 6 and the second magnetic claw 7 are hooks 12, and the hooks 12 hook downward to one side of the welding gun head 1, and the extension lines of the hooks 12 can intersect, and the intersection is located at 3mm-5mm from the lower end of the welding gun head 1; ensure that the magnetic field generating area completely covers the arc area.

[0019] S3: The first power source is connected in series with the coils 8 on the two first magnetic claws 6 through the first wire 9 to form a first loop, and the second power source is connected in series with the coils 8 on the two second magnetic claws 7 through the second wire 10 to form a second loop. After the first wire 9 and the second wire 10 are energized, a magnetic field is generated at the coil 8, and then the first magnetic claw 6 and the second magnetic claw 7 constrain the generated magnetic field, forming a magnetic field in the X-axis direction in the two first magnetic claws 6, and a magnetic field in the Y-axis direction in the two first magnetic claws 6.

[0020] S4: Therefore, before batch welding operations, it is necessary to conduct trial welding in the welding area, debug the built-in magnetic fields in the first magnetic claw 6 and the second magnetic claw 7 according to different original environmental magnetic fields, and record them before mass welding can be carried out. Test welding is carried out in the planned welding area. During trial welding, the voltage and current of the first circuit and the second circuit are adjusted, and then the magnetic field strength in the X-axis direction and the Y-axis direction are adjusted to form a built-in magnetic field that is slightly the same as the horizontal magnetic field in the original environmental magnetic field and in the opposite direction, so that the trial welding arc does not deviate in the horizontal direction.

[0021] S5: Adjust the parameters of the first and second circuits during the trial welding and perform welding operations. Clean them after cooling, and perform non-destructive testing on the welding interface to check the welding quality.

[0022] The second embodiment is the same as the first embodiment. In order to facilitate the adjustment of the voltage and current of the first circuit and the second circuit, a sliding adjustment mechanism 11 is further provided on the first magnetic claw 6 and the second magnetic claw 7. Each sliding adjustment mechanism 11 includes two legs 1101. The two legs 1101 are respectively provided on the first magnetic claw 6 or the second magnetic claw 7 and are located on both sides of the coil 8. A guide column 1102 is connected between the two legs 1101. A paddle 1103 is slidably connected to the guide column 1102. The end of the paddle 1103 is a pointed end, and the pointed end is in contact with the coil 8. The coil 8 is A wire connection end is provided on the end and the guide column 1102, respectively, for connecting the first wire 9 or the second wire 10; correspondingly, in step S4, when adjusting the voltage and current of the first circuit and the second circuit, the number of turns of the coil 8 connected to the first circuit and the second circuit is adjusted by sliding the paddle 1103, that is, adjusting the resistance connected to the first circuit and the second circuit; through the position of the sliding paddle 1103, the number of gates of the coil 8 connected to the circuit can be adjusted, so as to adjust the strength of the magnetic field in the first magnetic claw 6 and the second magnetic claw 7. Through the setting of the paddle 1103 in this structure, the number of gates of the coil 8 connected to the first circuit and the second circuit can be adjusted, so as to adjust the strength of the magnetic field in the first magnetic claw 6 and the second magnetic claw 7.

[0023] Embodiment 3 is the same as Embodiment 1. Considering that a large amount of heat will be generated during arc welding, excessive arc welding temperature will lead to reduced hardness and impact toughness of the welded part. At the same time, the coil 8 will heat up when power is turned on, damaging the coil 8. Therefore, in this embodiment, auxiliary legs 1101 are provided on the inner circle connecting arc plate 3 on one side of the first magnetic claw 6 and on the outer circle connecting arc plate 4 on one side of the second magnetic claw 7. The auxiliary legs 1101 are connected to water cooling pipes, which are connected to the cooling water tank through a circulating water pump. A large amount of heat will be generated during arc welding. Excessive arc welding temperature will lead to reduced hardness and impact toughness of the welded part. At the same time, heat will also be generated during the electromagnetism process. Overheating will damage components in the circuit. Among them, the cooling water tank adopts the WS-200A cooling water tank. By adding a water cooling pipe to cool the welding area, the single welding time can be further increased.

[0024] like Figure 4 , Figure 5 , which is a comparison of the welding surface forming effect diagram when the welding area magnetic field control device is installed on the welding gun head 1. When there is no welding area magnetic field control device, the welding surface is relatively rough. When using this device, adjusting the number of turns of the coil 8 on the two first magnetic claws 6 on the X-axis and the number of turns of the coil 8 on the two second magnetic claws 7 on the Y-axis to form an internal magnetic field with the opposite direction and the same intensity as the original environmental magnetic field, the welding surface is relatively smooth.

[0025] The above description is only the preferred embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made by using the contents of the present invention specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A strong magnetic space arc welding construction method, characterized in that: The steps include: S1: Plan the welding area in the electrolysis workshop at the construction site; S2: A magnetic field correction device having a size matching that of the welding gun head (1) is selected and clamped on the welding gun head (1), wherein the welding gun head (1) is arranged along the Z-axis direction, and the magnetic field correction device comprises a mounting seat that can be clamped on the welding gun head (1), and two first magnetic claws (6) are arranged on the mounting seat along the X-axis direction, and two second magnetic claws (7) are arranged along the Y-axis direction; the two first magnetic claws (6) have different magnetic poles, and the two second magnetic claws (7) have different magnetic poles, and the first magnetic claws (6) and the second magnetic claws (7) are both arranged perpendicular to the mounting seat, and the planes on which the two first magnetic claws (6) are located are perpendicular to the planes on which the two second magnetic claws (7) are located; and a coil (8) is wound around the first magnetic claw (6) and the second magnetic claw (7); S3: The first power source is connected in series with the coils (8) on the two first magnetic claws (6) through the first wire (9) to form a first circuit, and the second power source is connected in series with the coils (8) on the two second magnetic claws (7) through the second wire (10) to form a second circuit; S4: Test welding is performed in the planned welding area. During the test welding, the voltage and current of the first circuit and the second circuit are adjusted until the test welding arc does not deviate in the horizontal direction; S5: Adjust the parameters of the first and second circuits during the trial welding and perform welding operations. Clean them after cooling, and perform non-destructive testing on the welding interface to check the welding quality.

2. A strong magnetic space arc welding construction method according to claim 1, characterized in that: The mounting seat in step S2 comprises a gun head connecting ring (2) adapted to the welding gun head (1), an inner ring connecting arc plate (3) being connected to the gun head connecting ring (2), an outer ring connecting arc plate (4) being arranged outside the gun head connecting ring (2), the outer ring connecting arc plate (4) being connected to the gun head connecting ring (2) via a connecting plate (5); two first magnetic claws (6) being arranged on the inner ring connecting arc plate (3), and two second magnetic claws (7) being arranged on the outer ring connecting arc plate (4).

3. A strong magnetic space arc welding construction method according to claim 1, characterized in that: In step S2, a sliding adjustment mechanism (11) is further provided on the first magnetic claw (6) and the second magnetic claw (7), each sliding adjustment mechanism (11) comprising two legs (1101), the two legs (1101) being respectively provided on the first magnetic claw (6) or the second magnetic claw (7) and being located on both sides of the coil (8), a guide post (1102) being connected between the two legs (1101), a paddle (1103) being slidably connected to the guide post (1102), the end of the paddle (1103 being a pointed end, the pointed end being in contact with the coil (8); a wire connection end is respectively provided on one end of the coil (8) and the guide post (1102) for connecting the first wire (9) or the second wire (10); Correspondingly, in step S4, when adjusting the voltage and current of the first loop and the second loop, the sliding paddle (1103) is used to adjust the number of turns of the coil connected to the first loop and the second loop, and the resistance connected to the first loop and the second loop is adjusted at the same time.

4. A strong magnetic space arc welding construction method according to claim 1, characterized in that: In step S2, after the mounting base is clamped and fixed on the welding gun head (1), the lowermost ends of the first magnetic claw (6) and the second magnetic claw (7) are flush with the end of the welding gun head (1) or extend downward from the end of the welding gun head (1) by 0.5-0.8 mm.

5. A strong magnetic space arc welding construction method according to claim 1, characterized in that: In step S2, the lower ends of the first magnetic claw (6) and the second magnetic claw (7) are hook portions (12), and the hook portions (12) are hooked downward toward one side of the welding gun head (1), and the extension lines of the hook portions (12) can intersect, with the intersection point being located 3 mm to 5 mm from the lower end of the welding gun head (1).

6. A strong magnetic space arc welding construction method according to claim 1, characterized in that: In step S2, the first magnetic claw (6) and the second magnetic claw (7) are made of low-carbon steel, and the coil (8) is wound with enameled copper wire.

7. A strong magnetic space arc welding construction method according to claim 1, characterized in that: In step S2, auxiliary legs (1101) are provided on one side of the first magnetic claw (6) on the inner ring connecting arc plate (3) and on one side of the second magnetic claw (7) on the outer ring connecting arc plate (4), and the auxiliary legs (1101) are connected to water cooling pipes, which are connected to a cooling water tank via a circulating water pump.

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