Auxiliary welding device for coupling magnetic field and vibration

Abstract

The magnetic field and vibration coupling welding auxiliary device comprises a device body, a mounting cavity is formed in the device body, a vibration part is arranged at the position, close to an upper opening, of the mounting cavity, and a welding platform is arranged in the middle of the vibration part. The welding device further comprises a magnetic field generating part. The magnetic field generating part comprises a vibration generating column arranged in the vertical direction, the outer wall of the vibration generating column is wound and sleeved with an electromagnetic coil, the welding platform is further provided with an integrated welding mechanism, the integrated welding mechanism is located in the geometric center of the vibration part, and the integrated welding mechanism and the vibration part are both located in a magnetic field of the magnetic field generating part. When the electromagnetic coil is powered on, the vibration generation column and the electromagnetic coil reciprocate in the axis direction relative to the permanent magnet, the movement direction of the vibration generation column and the electromagnetic coil is the same as the axis direction of the permanent magnet, and the vibration part and the integrated welding mechanism are driven to vibrate in a coupled mode. The device couples vibration and a magnetic field, and the welding quality is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a welding auxiliary device coupling magnetic field and vibration. Background Art

[0002] As an important connection process in modern manufacturing, MIG welding is widely used in automobile body welding, ship structure assembly, aerospace and other fields due to its high efficiency and stability, and has become one of the core technologies in these industries. In the MIG welding process, since the formation of the molten pool and the metal flow are affected by multiple factors, the stability of the welding quality and the strength of the joint are sometimes not guaranteed.

[0003] With the development of welding technology, research has found that external vibration or magnetic field can effectively improve the welding process, reduce welding defects, optimize the flow of the molten pool, and thus improve the welding quality. Based on this principle, some devices that provide vibration during the welding process or auxiliary systems that generate magnetic fields have gradually emerged. These devices include ultrasonic welding devices, auxiliary vibration induction brazing devices, mechanical vibration-assisted reduction of high nitrogen steel composite welding porosity devices, etc.; and in terms of magnetic field auxiliary devices, there are constant electromagnetic field-assisted welding devices, alternating magnetic field-assisted welding devices, permanent magnet-assisted welding devices, and magnetic field-assisted laser welding devices.

[0004] However, most of the existing vibration or magnetic field assisted welding devices have certain limitations. For example, ultrasonic welding devices are usually suitable for small-sized workpieces, and the control of frequency and amplitude is relatively complex, making it difficult to meet the high-efficiency requirements in large-scale production; although magnetic field assisted devices can improve welding quality, in actual operation, it is difficult to control the intensity and distribution of the magnetic field, and different workpiece materials have large differences in their response to the magnetic field, which may affect the consistency and stability of welding. In addition, most of these existing devices only rely on a single mechanism of vibration or magnetic field, making it difficult to take into account the advantages of both.

[0005] Therefore, how to combine the dual action mechanism of magnetic field and vibration to develop a new type of welding auxiliary device to optimize the welding process, improve welding quality and reduce welding defects is still a technical problem that needs to be solved urgently in the welding field. Summary of the invention

[0006] Aiming at the technical bottleneck of single physical field control in existing MIG welding, the present invention proposes an innovative magnetic field and vibration coupling welding auxiliary device and process method. By integrating the dynamic magnetic field generation system and the multi-frequency vibration excitation unit, a coordinated control mechanism of the molten pool flow field-temperature field-electromagnetic force field is constructed to achieve precise control of the droplet transition stability, molten pool fluidity and grain structure during welding, effectively solve welding defects such as pores, cracks, segregation, and significantly improve the welding quality under complex working conditions.

[0007] An embodiment of the present invention discloses a welding auxiliary device that couples a magnetic field and vibration, including a device body. An installation cavity is provided inside the device body. A vibration part is arranged at a position near the upper opening of the installation cavity. The vibration part is fixedly connected to the inner side wall of the device body. A welding platform is arranged in the middle of the vibration part.

[0008] The welding device further includes a magnetic field generating part. The magnetic field generating part is located inside the installation cavity and below the vibration part. The magnetic field generating part includes a vibration generating column arranged in the vertical direction. An electromagnetic coil is wound around the outer wall of the vibration generating column. The top end of the vibration generating column abuts against the bottom end of the welding platform. Permanent magnets are arranged at intervals on the outer circle of the vibration generating column. An elastic member is arranged below the vibration generating column. A base is arranged below the magnetic field generating part. One end of the elastic member abuts against the bottom of the vibration generating column, and the other end abuts against the base.

[0009] An integrated welding mechanism is further arranged on the welding platform. The integrated welding mechanism is located at the geometric center of the vibration part. The integrated welding mechanism includes a clamping mechanism for clamping the workpiece to be welded. The integrated welding mechanism is located above the magnetic field generating part in the height direction and at the magnetic field center position.

[0010] Both the integrated welding mechanism and the vibration part are located in the magnetic field of the magnetic field generating part. The vibration generating column can reciprocate along its own axis direction. When the electromagnetic coil is energized, the vibration generating column and the electromagnetic coil reciprocate relative to the permanent magnet. The moving direction of the vibration generating column and the electromagnetic coil is the same as the axis direction of the permanent magnet, and the vibration generating column can drive the vibration part and the integrated welding mechanism to couple and vibrate.

[0011] The vibration part includes a vibration membrane. The vibration membrane is arranged in the horizontal direction. Among them, when looking at the vibration membrane from above the installation cavity, the vibration membrane is circular. Vibration membrane rings are evenly and spacedly arranged on the vibration membrane. The vibration membrane rings have arc-shaped protrusions. And a plurality of deformation grooves are also spacedly arranged in the middle of the vibration membrane rings.

[0012] By adopting the above technical solution, the present application provides a welding auxiliary device that couples a magnetic field and vibration. A vibration part is arranged in the installation cavity of the device body. The vibration part can generate vibration. The vibration source of the vibration part is the vibration generating column. An electromagnetic coil is wound around the outer wall of the vibration generating column. When the electromagnetic coil is energized, a magnetic field will be generated. The integrated welding mechanism is located at the magnetic field center position. The welding effect is better in the magnetic field. At the same time, the magnetic field of the vibration generating column and the electromagnetic coil will interact with the permanent magnet, and then the vibration generating column and the electromagnetic coil will reciprocate relative to the permanent magnet to generate vibration. The vibration generating column drives the vibration part and the integrated welding mechanism to couple and vibrate, and the magnitude of the vibration and the magnetic field intensity are coupled with each other, further improving the welding effect.

[0013] Further preferably, for the welding auxiliary device that couples the magnetic field and vibration, the permanent magnet is in a ring shape, the inner diameter of the permanent magnet is larger than the outer diameter of the vibration generating column, and along the axial direction of the vibration generating column, the length of the vibration generating column is greater than the length of the permanent magnet. And there is a vibration gap reserved between the top of the permanent magnet and the bottom of the vibration part, which can avoid interference between the vibration part and the permanent magnet during vibration.

[0014] Moreover, in this application, the component that actually generates vibration and magnetic field is the same component, the magnetic field generating part. Since the magnetic field generating part includes a vibration generating column and an electromagnetic coil, the electromagnetic coil not only generates a magnetic field but also vibrates when interacting with the permanent magnet. That is to say, through the design of the structure of the vibration generating column and the electromagnetic coil in this application, while providing a magnetic field in the space of the welded workpiece, high-frequency vibration is also provided, enabling the vibration and the magnetic field to be coupled together, thereby improving the welding effect.

[0015] Further, in this application, by setting a vibration membrane, the high-frequency vibration generated by the electromagnetic coil can be further amplified, and the membrane rings and arc-shaped protrusions uniformly and spaced on the vibration membrane can further improve the vibration effect.

[0016] Further preferably, the base includes a first tabletop and a second tabletop, and along the height direction of the device body, the height of the first tabletop is greater than the height of the second tabletop.

[0017] The vibration generating column is set as a hollow column, the elastic member is set as a spring, one end of the spring is fixedly abutted against the first tabletop, and the other end extends into the hollow column and is fixedly connected to the vibration generating column.

[0018] A support seat is arranged below the permanent magnet, one end of the support seat is fixedly abutted against the second tabletop, and the other end is fixedly abutted against the bottom of the permanent magnet.

[0019] Further preferably, the integrated welding mechanism includes a welding operation part, a plurality of temperature sensors are arranged below the welding operation part, and a plurality of cooling pipes are arranged below the temperature sensors. Among them, one cooling pipe is correspondingly arranged below each temperature sensor, a flow control valve is arranged at the end of each cooling pipe, and the flow control valve is externally connected to a cooling pipe. And the temperature sensor is electrically connected to the flow control valve, and the temperature value of the temperature sensor has a linear change with the flow rate of the coolant.

[0020] Further preferably, the welding operation part is square-shaped, the temperature sensors are strip-shaped, and the plurality of temperature sensors are uniformly and spacedly arranged on the welding operation part.

[0021] Further preferably, a magnetic focusing edge is arranged at the top of the device body, and the magnetic focusing edge is set as a reduced-diameter structure. And the diameter of the top opening of the magnetic focusing edge is smaller than the diameter size of the vibration membrane.

[0022] Embodiments of the present invention also disclose a welding auxiliary device that couples a magnetic field and vibration. The welding platform includes a clamping mechanism, and the clamping mechanism includes a clamping base and a plurality of movable jaws provided on the clamping base. A plurality of movable slots are provided on the clamping base, and the number of movable slots is the same as the number of movable jaws. Each movable jaw is movably arranged in the movable slot, and the middle parts of the plurality of movable jaws have a clamping center for clamping a workpiece.

[0023] By adopting the above technical solution, the workpiece can be stably clamped by setting the movable jaws for welding.

[0024] Further preferably, the clamping base is rectangular, 4 movable slots are provided on the clamping base, the 4 movable slots are distributed along the diagonal of the clamping base, and the middle part of the clamping base has a circular clamping slot. Among them, 4 movable jaws are provided, and the 4 movable jaws are respectively movably arranged in the movable slots. Each movable jaw includes a driving cylinder and a clamping part. The clamping part is located at the power output end of the driving cylinder and is located in the movable slot. When the workpiece is located in the clamping slot, the clamping parts of the 4 movable jaws fix and clamp the workpiece.

[0025] The beneficial effects of the present invention are: The dynamic interaction between the electromagnetic coil and the permanent magnet generates high-frequency vibration, while maintaining a stable magnetic field required for welding. This magnetic field is the basis for welding work and improving welding quality and welding effect inside the device body in this application. The magnetic field guides the flow direction of molten metal, and vibration promotes the escape of bubbles and the discharge of impurities in the molten pool. Further cooperate with the vibration generating column and the electromagnetic coil to generate high-frequency vibration in the magnetic field. It should be noted that the vibration source for generating high-frequency vibration in this application is exactly the magnetic field source for generating the magnetic field. Therefore, the two are coupled into one body and the same component is used, and the structure is more ingenious.

[0026] More importantly, this application also discloses a solution for setting a vibration membrane. The vibration membrane uses an elastic material to amplify the amplitude, and further, a plurality of vibration membrane rings and arc-shaped protrusions are arranged at intervals. The membrane ring structure forms a multi-stage resonance cavity, and the arc-shaped protrusions generate vortex vibration waves. Further, on the basis of improving the vibration stability, the workpiece to be welded on the clamping mechanism generates more uniform and regular vibration during welding, and cooperates with the magnetic field to improve the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a cross-sectional view of the welding auxiliary device that couples a magnetic field and vibration disclosed in the embodiment of the present invention; Figure 2 is a cross-sectional view of a partial structure of the welding auxiliary device that couples a magnetic field and vibration disclosed in the embodiment of the present invention; Figure 3Partial structural schematic diagram of the welding platform of the welding auxiliary device for coupling magnetic field and vibration disclosed in the embodiments of the present invention; Figure 4 Top view of the welding auxiliary device for coupling magnetic field and vibration disclosed in the embodiments of the present invention; Figure 5 Front view structure of the welding auxiliary device for coupling magnetic field and vibration disclosed in the embodiments of the present invention; Figure 6 Overall structural schematic diagram of the clamping mechanism of the welding auxiliary device for coupling magnetic field and vibration disclosed in the embodiments of the present invention; Figure 7 Macrograph of the weld seam under different welding conditions of the welding auxiliary device for coupling magnetic field and vibration disclosed in the embodiments of the present invention, where (a) is the comparative experiment graph, (b) is the graph of adding magnetic field experiment, and (c) is the graph of adding magnetic field and vibration simultaneously experiment; Figure 8 Micrograph of the weld seam of the welding auxiliary device for coupling magnetic field and vibration disclosed in the embodiments of the present invention. Explanation of reference numerals: 100, device body; 110, installation cavity; 120, magnetic field concentrating edge; 200, vibration part; 210, vibration membrane ring; 220, arc-shaped protrusion; 230, deformation groove; 300, welding platform; 310, integrated welding mechanism; 320, temperature sensor; 330, cooling pipeline; 331, flow control valve; 340, clamping mechanism; 341, clamping base; 342, movable jaw; 343, movable slot; 344, driving cylinder; 345, clamping part; 400, magnetic field generating part; 410, vibration generating column; 420, electromagnetic coil; 430, permanent magnet; 431, support seat; 440, elastic part; 450, base; 451, first tabletop; 452, second tabletop; 500, vibration gap. Detailed implementation manners

[0028] As mentioned in the background art, providing vibration during welding in the prior art can further improve the welding quality. However, the vibration mechanism in the prior art is generally a separately provided ultrasonic high-frequency vibration mechanism. The ultrasonic high-frequency vibration mechanism needs to be vibrated in cooperation during welding to improve the welding quality. At this time, it is necessary to control the vibration frequency, and the control requirements and precision requirements for the instrument are relatively high. The requirements for collaborative control and control precision are relatively high. During the experiment, a high-speed camera, a control system, etc. are generally required to work together.

[0029] Therefore, the present application provides a welding auxiliary device that couples a magnetic field and vibration. The device includes a magnetic field generating part and a vibration part. Through the structural setting of the magnetic field generating part and the cooperation of the vibration part, the magnetic field generating part is composed of a permanent magnet and a vibration generating column wound with an electromagnetic coil. When the electromagnetic coil is energized, not only will a magnetic field be generated, but at the same time, the vibration generating column and the electromagnetic coil will reciprocate relative to the permanent magnet, thereby driving the vibration part and the integrated welding mechanism to couple and vibrate. Because adding a magnetic field during the welding process can refine grains and optimize the arc and droplet transfer behavior, the welding effect is better. When further coupling vibration, it can further improve the weld structure and mechanical properties.

[0030] Please first refer to Figure 1 and Figure 5 , an embodiment of the present invention discloses a welding auxiliary device that couples a magnetic field and vibration, including a device body 100. There is an installation cavity 110 inside the device body 100. A vibration part 200 is provided at a position near the upper opening of the installation cavity 110. The vibration part 200 is fixedly connected to the inner side wall of the device body 100. A welding platform 300 is provided in the middle of the vibration part 200. Specifically, in this embodiment, the vibration part 200 can be a common vibration film. Setting it as a vibration film has a higher vibration frequency. The material of the vibration film can be made of plastic, rubber, metal, polyester material, etc. This embodiment does not make specific limitations on this.

[0031] The welding device further includes a magnetic field generating part 400. The magnetic field generating part 400 is located inside the installation cavity 110 and below the vibration part 200. The magnetic field generating part 400 includes a vibration generating column 410 arranged in the vertical direction. An electromagnetic coil 420 is wound around the outer wall of the vibration generating column 410. The top end of the vibration generating column 410 abuts against the bottom end of the welding platform 300. A permanent magnet 430 is arranged at intervals on the outer circle of the vibration generating column 410. An elastic member 440 is provided below the vibration generating column 410. A base 450 is provided below the magnetic field generating part 400. One end of the elastic member 440 abuts against the bottom of the vibration generating column 410, and the other end abuts against the base 450.

[0032] An integrated welding mechanism 310 (only the structure of the welding platform is shown in the figure, and the welding torch is not shown) is further provided on the welding platform 300. The integrated welding mechanism 310 is located at the geometric center of the vibration part 200, and is located above the magnetic field generating part 400 in the height direction and at the magnetic field center position.

[0033] Both the integrated welding mechanism 310 and the vibration part 200 are located in the magnetic field of the magnetic field generating part 400. The vibration generating column 410 can reciprocate along its own axis direction. When the electromagnetic coil 420 is energized, the vibration generating column 410 and the electromagnetic coil 420 reciprocate relative to the permanent magnet 430. The moving directions of the vibration generating column 410 and the electromagnetic coil 420 are the same as the axis direction of the permanent magnet 430, and the vibration generating column 410 can drive the vibration part 200 and the integrated welding mechanism 310 to couple and vibrate.

[0034] Specifically, in this embodiment, the vibration generating column 410 is preferably arranged as a hollow column, and the mass of the hollow column is lighter. When the electromagnetic coil 420 is wound around the outside, when the magnitude and direction of the current passing through the electromagnetic coil 420 are different, the magnetic fields of the vibration generating column 410 and the electromagnetic coil 420 act on the magnetic field of the permanent magnet 430. At this time, the vibration generating column 410 will displace relative to the permanent magnet 430. For details, see Figure 1 , when the magnitude and direction of the current in the electromagnetic coil 420 change, the vibration generating column 410 will vibrate in the vertical direction. The elastic member 440 at the bottom of the vibration generating column 410 further acts, and the top of the vibration generating column 410 drives the welding platform 300 and the integrated welding mechanism 310 to vibrate because it is connected to the welding platform 300.

[0035] And see Figure 1 and Figure 2 , the vibration part 200 includes a vibration membrane, and the vibration membrane is arranged horizontally. Among them, when looking at the vibration membrane from above the installation cavity 110, the vibration membrane is circular in shape. The vibration membrane is evenly and spacedly provided with vibration membrane rings 210, and the vibration membrane rings 210 have arc-shaped protrusions 220. And, a plurality of deformation grooves 230 are also spacedly arranged in the middle of the vibration membrane rings 210.

[0036] When the applicant was researching argon arc welding, it was found that applying a magnetic field during the welding process could improve the welding quality and effect. Further, providing vibration during the welding process could also improve the welding quality and effect. However, when providing magnetic field welding, the requirement for providing vibration was relatively high, and it was necessary to coordinate between the magnetic field strength and the vibration frequency to promote the welding effect. However, the existing magnetic fields and vibrations were both separately arranged devices, and it was difficult for them to act together to improve the welding effect. Even worse, the magnetic field and vibration might interfere with each other and affect the welding quality. Therefore, a precise control mechanism needed to be set up to make the magnetic field and vibration have the same frequency. Adopting such a design scheme required a high cost and could only be carried out in a precision laboratory.

[0037] Adopting the solution disclosed in this application can well couple the vibration and the magnetic field together because the vibration generating source and the magnetic field generating source are actually the same component (magnetic field generating part 400). The magnetic field generating part 400 includes a vibration generating column 410 and an electromagnetic coil 420. The electromagnetic coil 420 not only generates a magnetic field but also vibrates when interacting with the permanent magnet 430. That is to say, through the design of the structure of the vibration generating column 410 and the electromagnetic coil 420 in this application, while providing a magnetic field in the space of the welded workpiece, high-frequency vibration is also provided, so that the vibration and the magnetic field are jointly coupled under the action of the same generating source, thereby improving the welding effect on the workpiece, and no other complex control machines or control schemes are required.

[0038] Furthermore, by setting the vibration part 200, that is, the vibration film, in this application, the high-frequency vibration generated by the electromagnetic coil can be further amplified. Moreover, the vibration film rings 210 and the arc-shaped protrusions 220 evenly and spaced on the vibration film can further improve the vibration effect.

[0039] In addition to using elastic materials, the vibration film can also be made of composite materials with specific damping characteristics according to different welding requirements and workpiece characteristics. For example, when welding some precision workpieces sensitive to vibration, materials with high damping characteristics can be selected to reduce unnecessary vibration transmission and energy loss and ensure the stability of the welding process; while for some workpieces that require a larger amplitude to promote the discharge of substances in the molten pool, materials with a higher elastic modulus and good recovery performance can be selected to achieve a more efficient vibration amplification effect.

[0040] Specifically, the dynamic interaction between the electromagnetic coil 420 and the permanent magnet 430 generates high-frequency vibrations while maintaining a stable magnetic field required for welding. This magnetic field is the basis for welding work inside the device body in this application and improving the welding quality and effect. The magnetic field guides the flow direction of the molten metal, and the vibrations promote the escape of bubbles and the discharge of impurities in the molten pool. Further, in cooperation with the vibration generating column 410 and the electromagnetic coil 420 to generate high-frequency vibrations in the magnetic field, it should be noted that the vibration source that generates high-frequency vibrations in this application is exactly the magnetic field source that generates the magnetic field. Therefore, the two are coupled into one body and the same component is used, making the structure more ingenious.

[0041] More importantly, this application also discloses a solution for setting up a vibration membrane. It should be noted that the vibration membrane uses an elastic material to achieve amplitude amplification, and further, a plurality of vibration membrane rings 210 and arc-shaped protrusions 220 are arranged at intervals. The membrane ring structure forms a multi-stage resonance cavity, and the arc-shaped protrusions generate vortex vibration waves. Further, on the basis of improving the vibration stability, the workpieces to be welded on the clamping mechanism generate more uniform and regular vibrations during welding, cooperating with the magnetic field to improve the welding quality. For details, see Figure 7 The quality of the weld seam after vibration welding using the vibration membrane ring 210 is significantly better than that of the weld seam without vibration.

[0042] With the design of this structure in this application, the vibration membrane is circular in shape. This design enables the vibration energy to be evenly distributed on the vibration membrane. When the vibration generating column 410 drives the vibration membrane to vibrate, the circular structure helps to reduce energy loss and stress concentration during vibration, thereby improving the vibration transmission efficiency and uniformity. The uniform vibration characteristics have a positive effect on the molten pool stirring, grain refinement, and reduction of welding defects during the welding process.

[0043] Further, in some other implementation modes, the vibration membrane can be designed as a multi-layer structure, and different layers use materials with different properties or have different structural characteristics. For example, the vibration membrane is set as a two-layer structure. The layer close to the electromagnetic coil uses a material with good magnetic conductivity to enhance the energy transfer efficiency between the electromagnetic coil and the vibration membrane; while the layer close to the workpiece uses a material with good elasticity and wear resistance, which can not only ensure the vibration effect but also extend the service life of the vibration membrane. In addition, the layers can be connected through special connection methods, such as bonding, hot pressing, etc., to ensure the stability and reliability of the overall structure.

[0044] By amplifying the high-frequency vibrations generated by the electromagnetic coil 420 through the vibration membrane, and the synergistic effect of the vibration generating column and the electromagnetic coil, the bubbles and impurities in the molten pool during the welding process can escape and be discharged more quickly and effectively. This can not only reduce the generation of welding defects, such as pores, slag inclusions, etc., but also shorten the welding time and improve the welding efficiency.

[0045] The diaphragm rings 210 and the arc-shaped protrusions 220 that are uniformly and spaced on the diaphragm form multiple resonant cavities and vortex vibration waves, causing the workpieces to be welded on the clamping mechanism to generate more uniform and regular vibrations during welding. This uniform vibration can make the stress distribution at the weld seam more uniform, reduce the generation of welding residual stress, and improve the fatigue strength and crack resistance of the welded joint.

[0046] The combined coupling effect of the magnetic field and high-frequency vibration optimizes the heat input during the welding process. The constraint effect of the magnetic field on the molten metal reduces the range of the heat-affected zone of welding, and reduces the risks of welding deformation and hot cracks. At the same time, high-frequency vibration promotes the convection and heat transfer in the molten pool, making the weld microstructure finer and more uniform, improving the mechanical properties and corrosion resistance of the welded joint, and thus significantly enhancing the welding quality.

[0047] The diaphragm rings 210 that are uniformly and spaced on the diaphragm, and the arc-shaped protrusions 220 on the diaphragm rings 210, increase the stiffness and elasticity of the diaphragm. This design enables the diaphragm to generate a larger vibration amplitude when subjected to vibration excitation and has better response characteristics to vibration signals of different frequencies. The setting of the diaphragm rings 210 not only enhances the vibration characteristics of the diaphragm but also improves its structural stability. During the vibration process, the diaphragm rings 210 can disperse stress and reduce the risk of deformation and damage of the diaphragm. A plurality of deformation grooves 230 are spaced in the middle of the diaphragm rings 210, providing a stress release channel for the diaphragm during the vibration process. When the diaphragm is subjected to vibration excitation, the deformation grooves 230 can allow the diaphragm to undergo slight deformation in a local area, thereby releasing stress and preventing the diaphragm from being damaged due to excessive stress.

[0048] Through the vibration action generated by the diaphragm, the molten pool during the welding process can be more fully stirred, the molten pool has stronger fluidity, which is beneficial to refining grains and improving the weld microstructure. This helps to improve the mechanical properties and corrosion resistance of the weld and extend the service life of the welded structural parts. The vibration action generated by the diaphragm can also promote the discharge of gas and the floating of impurities during the welding process, reducing defects such as pores and slag inclusions in the weld. At the same time, the vibration action can also reduce the welding residual stress and deformation and improve the quality and stability of the welded joint.

[0049] For example, see Figure 7 and Figure 8 , Figure 7 are the macroscopic morphology result diagrams and comparison result diagrams of the welds obtained after welding using the welding auxiliary device disclosed in this application, Figure 8 are the microscopic morphology result diagrams and comparison result diagrams of the welds obtained after welding using the welding auxiliary device disclosed in this application. In Figure 7Among them, the bead experiment parameters on the same plate are the same and are the results of multiple welding experiments under the same process parameters. The leftmost (a) comparison experiment diagram is the macroscopic morphology diagram of the weld obtained without adding vibration and magnetic field. The middle (b) magnetic field addition experiment diagram is the macroscopic morphology diagram of the weld obtained after adding the magnetic field. The rightmost (c) is the macroscopic morphology diagram of the weld obtained after adding the magnetic field and vibration simultaneously. It can be seen that the weld quality in the (a) diagram without adding vibration and magnetic field is the worst, and the weld quality in the (c) diagram with the magnetic field and vibration added simultaneously by the device of the present application is the best. Figure 8 The left diagram (microstructure of the comparative experiment) in shows the microstructure without adding any experimental conditions. Figure 8 The right diagram (microstructure when adding magnetic field and vibration simultaneously) in shows the microstructure when adding the magnetic field and vibration simultaneously. It can be seen that in the micrograph without any conditions on the left, the grains of the microstructure are all dendritic crystal structures with larger structural volumes, the mechanical properties deteriorate, and the toughness and plasticity of the weld are even worse. After adding the magnetic field and vibration on the right, the dendritic crystal structure is finer and more uniform, showing higher mechanical properties, and the toughness and plasticity of the weld are better.

[0050] It should be noted that an alternating current passes through the electromagnetic coil 420. Because after the alternating current passes through the electromagnetic coil 420, an alternating magnetic field will be generated. The alternating magnetic field generated by the electromagnetic coil 420 interacts with the constant field of the permanent magnet, and then the vibration generating column 410 and the electromagnetic coil 420 move reciprocally. Because the frequency of the alternating current is relatively high, finally, it is manifested as the high-frequency vibration of the vibration generating column 410. It should be noted that the higher the frequency of the alternating current, the higher the actual vibration frequency, and the greater the current of the alternating current, the greater the vibration amplitude.

[0051] With this design of the present application, the present application provides a welding auxiliary device that couples a magnetic field and vibration. A vibration part 200 is provided in the installation cavity 110 of the device body 100. The vibration part 200 can generate vibration. The vibration source of the vibration part 200 is the vibration generating column 410. An electromagnetic coil 420 is wound around the outer wall of the vibration generating column 410. When the electromagnetic coil 420 is energized, a magnetic field will be generated. The integrated welding mechanism 310 is located at the center of the magnetic field, and the welding effect is better in the magnetic field. At the same time, the magnetic fields of the vibration generating column 410 and the electromagnetic coil 420 will interact with the permanent magnet 430, and then the vibration generating column 410 and the electromagnetic coil 420 will move reciprocally relative to the permanent magnet 430 to generate vibration. The vibration generating column 410 drives the vibration part 200 and the integrated welding mechanism 310 to couple and vibrate, and the frequency and amplitude of the vibration are coupled with the magnetic field intensity, further improving the welding effect (the grains in the weld structure are finer and more uniform).

[0052] During the welding process of the welding device disclosed in this application, the magnetic field stirs the weld pool, refines the grains, and thus improves the mechanical properties of the weld material. Grain refinement can enhance the yield limit and strength limit of the material, reduce the occurrence probability of welding hot cracks and cold cracks, and at the same time improve the fracture toughness and crack resistance of the weld. Vibration can cause the molten droplets to produce minute flows. The coupled action of the magnetic field and vibration can relieve the thermal stress field, promote thermoplastic deformation, release the constrained strain, and reduce or equalize the welding residual stress. This helps prevent cracks from occurring in the welded components during use, extends their service life, and stabilizes the dimensional accuracy of the components.

[0053] Through the combined action of vibration and magnetic field, the welding deformation can be reduced by more than 30%. The magnetic field homogenizes the alloying elements in the weld, while vibration promotes the discharge of gas and the floating of impurities, reduces defects such as pores and slag inclusions in the weld, reduces the sensitivity to defects, enhances the crack resistance of the weld. Further, the magnetic field can adjust the diffusion behavior of interface elements, improve the molten pool flow and element mixing, inhibit the formation of intermetallic compounds, and reduce their thickness. Thereby improving the strength and plasticity of the joint. Moreover, the vibration magnitude and magnetic field strength are coupled with each other. By adjusting the current magnitude of the electromagnetic coil 420, the vibration amplitude and magnetic field strength can be precisely controlled, realizing the fine adjustment of the welding process, meeting the requirements of different welding processes. And this device integrates the vibration generating column 410, the electromagnetic coil 420, and the permanent magnet 430 into one body, with a compact structure, facilitating installation and maintenance. At the same time, it reduces the floor area of the equipment and improves the production efficiency.

[0054] Further preferably, please refer to Figure 1 and Figure 2 , in the welding auxiliary device with coupled magnetic field and vibration disclosed in this application, the permanent magnet 430 is in a ring shape, the inner diameter of the permanent magnet 430 is larger than the outer diameter of the vibration generating column 410, and along the axial direction of the vibration generating column 410, the length of the vibration generating column 410 is greater than the length of the permanent magnet 430. And there is a vibration gap 500 reserved between the top of the permanent magnet 430 and the bottom of the vibration part 200, which can avoid interference between the vibration part 200 and the permanent magnet 430 when the vibration part 200 vibrates.

[0055] Specifically refer to Figure 2 , when the electromagnetic coil 420 is energized, the magnetic field of the electromagnetic coil 420 acts with the magnetic field of the permanent magnet 430, and causes the vibration generating column 410 to generate high-frequency vibration along the vertical direction. The vibration generated by the vibration generating column 410 is transmitted to the integrated welding mechanism 310, and the integrated welding mechanism 310 is located at the geometric center of the vibration part 200, with a higher vibration effect.

[0056] Specifically, the vibration gap 500 reserved between the top of the magnet and the bottom of the vibration part 200 can be set to any value within the range of 10 to 20 mm. For example, the vibration gap 500 can be 10 mm, 15 mm, 20 mm, etc. This embodiment does not make specific limitations on this.

[0057] Further preferably, please refer to Figure 1 , the base 450 includes a first tabletop 451 and a second tabletop 452. Along the height direction of the device body 100, the height of the first tabletop 451 is greater than the height of the second tabletop 452. The vibration generating column 410 is set as a hollow column, and the elastic member 440 is set as a spring. One end of the spring is fixedly abutted against the first tabletop 451, and the other end extends into the hollow column and is fixedly connected to the vibration generating column 410.

[0058] A support seat 431 is arranged below the permanent magnet 430. One end of the support seat 431 is fixedly abutted against the second tabletop 452, and the other end is fixedly abutted against the bottom of the permanent magnet 430. The permanent magnet 430 is fixedly arranged through the support seat 431.

[0059] Further preferably, please refer to Figure 2 and Figure 3 , the integrated welding mechanism 310 includes a welding operation part. A plurality of temperature sensors 320 are arranged below the welding operation part, and a plurality of cooling pipes 330 are arranged below the temperature sensors 320. One cooling pipe 330 is correspondingly arranged below each temperature sensor 320, and a flow control valve 331 is arranged at the end of each cooling pipe 330. The flow control valve 331 is externally connected to a cooling pipe. And the temperature sensor 320 is electrically connected to the flow control valve 331, and the temperature value of the temperature sensor 320 changes linearly with the flow rate of the coolant. The welding operation part is square-shaped, the temperature sensors 320 are strip-shaped, and the plurality of temperature sensors 320 are uniformly and spacedly arranged on the welding operation part.

[0060] With this structural design, the plurality of temperature sensors 320 are accurately arranged above the welding operation part, and can real-time and accurately monitor the temperature change in the welding area. Once an abnormal temperature rise is detected, the sensor will immediately transmit a signal to the corresponding flow control valve 331. This real-time monitoring and response mechanism ensures that the temperature during the welding process is always within the optimal range, avoiding welding defects such as cracks and pores caused by overheating, thus significantly improving the welding quality.

[0061] It should be further noted that, in this embodiment, the arrangement direction of the temperature sensors is perpendicular to the welding direction. The effect of such a setting is that gradient cooling can be achieved, thereby improving the cooling effect.

[0062] The electrical connection between the temperature sensor 320 and the flow control valve 331 enables the flow rate of the coolant to be precisely adjusted according to the readings of the temperature sensor 320. The temperature value and the coolant flow rate vary linearly, that is, the higher the temperature, the faster the coolant flow rate, thereby achieving rapid cooling of the welding area. This proportional adjustment mechanism ensures the dynamic balance between the cooling effect and the welding heat input, further guaranteeing the stability of the welding quality. A cooling pipe 330 is correspondingly arranged below each temperature sensor 320, and a flow control valve 331 is equipped at the end of the cooling pipe 330. This design enables the coolant to directly and efficiently act on the welding area to achieve rapid heat dissipation.

[0063] Further preferably, please refer to Figure 1 and Figure 4 , a magnetic concentrating edge 120 is provided at the top of the device body 100, and the magnetic concentrating edge 120 is of a reduced-diameter structure. Moreover, the diameter of the top opening of the magnetic concentrating edge 120 is smaller than the diameter of the vibration membrane. The setting of the magnetic concentrating edge 120 can concentrate the magnetic induction lines within the device body 100, thereby increasing the magnetic field strength within the device body.

[0064] The embodiment of the present invention also discloses a welding auxiliary device that couples a magnetic field and vibration. Please refer to Figure 2 and Figure 6 , the welding platform 300 includes a clamping mechanism 340, and the clamping mechanism 340 includes a clamping base 341 and a plurality of movable jaws 342 arranged on the clamping base 341; wherein a plurality of movable grooves 343 are provided on the clamping base 341, and the number of movable grooves 343 is the same as the number of movable jaws 342. Each movable jaw 342 is movably arranged in the movable groove 343, and the middle parts of the plurality of movable jaws 342 are used for clamping the workpiece.

[0065] Further preferably, please refer to Figure 6 , the clamping base 341 is rectangular, 4 movable grooves 343 are provided on the clamping base 341, and the 4 movable grooves 343 are distributed along the diagonal of the clamping base 341. Moreover, the middle part of the clamping base 341 has a circular clamping groove; wherein, 4 movable jaws 342 are provided, and the 4 movable jaws 342 are respectively movably arranged in the movable grooves 343. Each movable jaw 342 includes a driving cylinder 344 and a clamping part 345. The clamping part 345 is located at the power output end of the driving cylinder 344 and is located in the movable groove 343. When the workpiece is located in the clamping groove, the clamping parts 345 of the 4 movable jaws 342 fix and clamp the workpiece.

[0066] With the design of the above structure, the clamping base 341 is rectangular, which is convenient for layout and installation in a limited space. The four movable slots 343 are distributed along the diagonal of the clamping base 341. This layout enables the movable jaws 342 to be evenly stressed when clamping the workpiece, improving the stability and efficiency of clamping. The four movable jaws 342 are respectively movably arranged in the movable slots 343. When the workpiece is located in the clamping slot, the clamping portions 345 of the four movable jaws 342 can simultaneously fix and clamp the workpiece. The middle part of the clamping base 341 has a circular clamping slot. This design enables the workpiece to maintain good concentricity during the clamping process, further improving the stability and accuracy of clamping.

[0067] By adjusting the positions of the movable jaws 342 in the movable slots 343, the clamping mechanism 340 can adapt to workpieces of different sizes and shapes. This flexibility enables the clamping mechanism 340 to play a good role in a variety of welding scenarios. The stable clamping effect provided by the clamping mechanism 340 of the present application can reduce the vibration and displacement of the workpiece during welding, thereby improving the accuracy and quality of welding. And because the clamping mechanism 340 can fix the workpiece quickly and accurately, the preparation time before welding can be shortened, the welding speed can be increased, and the production efficiency can be improved.

[0068] More preferably, the welding auxiliary device for coupling magnetic field and vibration disclosed in the present invention further includes a welding robot (not shown in the figure). The welding robot includes a welding robotic arm and a welding torch, and the welding torch is located at the end of the welding robotic arm.

[0069] The applicant conducts test and measurement on the welding auxiliary device for coupling magnetic field and vibration disclosed in the present application. Next, test simulation and measurement are carried out on the device disclosed in the present application, and an explanation is given on the beneficial effect of the test and measurement. First, calculate the frequencies of the vibration part 200 and the integrated welding mechanism 310 during vibration according to the following formula. The following formula represents the relationship between the vibration frequency of the vibration part, the number of turns of the coil, the coil diameter, the coil winding radius, and the magnetic permeability of the permanent magnet. The vibration frequency of the vibration part disclosed in the present invention is f, where: Figures 7 - 8 In this formula:

[0070] f is the vibration frequency; N is the number of turns of the coil; I is the current in the coil; m is the mass of the vibration system; A is the vibration amplitude; L is the length of the coil; is the permeability of free space.

[0071] Furthermore, in the present application, the relationship table of the magnitude of the alternating current, the input frequency, the magnetic field strength, the amplitude, and the frequency can be seen in Table 1.

[0072] Table 1. Table of the relationships between the magnitude of alternating current, input frequency, magnetic field strength, amplitude, and frequency Alternating current I (A) Magnetic field strength B (mT) Amplitude A (mm) <![CDATA[AC frequency f1 (Hz)]]> <![CDATA[Alternating magnetic field frequency f 2 (Hz)]]> Vibration frequency f (Hz) 0 0 0 0 0 0 0.5 2 0.0001 100 100 100 1 5 0.0005 250 250 250 2 10 0.002 400 400 400 4 25 0.01 500 500 500 6 100 0.06 1500 1500 1500 20 140 0.28 2500 2500 2500 For example, when the alternating current is 2 A, the magnetic field strength is 10 mT, the amplitude is 0.002 mm, the frequency of the alternating current is 400 Hz, and the frequency of the alternating magnetic field is also 400 Hz, the vibration frequency of the vibrating part finally shown is 400 Hz. It should be noted that those skilled in the art can design and adjust according to actual needs, and this embodiment does not make specific limitations thereto.

[0073] It should be noted that in the experiments disclosed in this embodiment, there are only differences in not applying vibration and magnetic field, applying magnetic field, and applying magnetic field and vibration simultaneously, and other experimental parameters (such as current, etc.) are the same.

[0074] Table 2. Influence of different elastic elements on the actual vibration frequency Experimental conditions Elastic component not added Elastic component added Elastic component and vibration film added simultaneously Frequency (Hz) 500 1000 2500 Please refer to Table 2. The magnitude and frequency of the alternating current passed through the coil are the same. Table 2 only conducts experiments with the elastic element as the variable. Among them, the vibration frequency changes are respectively when no elastic element is added, an elastic element is added, and an elastic element and a vibration film are added simultaneously (using the welding auxiliary device disclosed in this application). The input frequency of the AC power supply is 2500 Hz. By comparison, it is found that the vibration frequency is the highest when the elastic element and the vibration film of the welding auxiliary device disclosed in this application are used, indicating that the vibration response ability of the system is stronger after adding the vibration film.

[0075] The changes in the weld grain size, microhardness, number of pores, porosity, and number of cracks under different welding conditions can be seen in Table 3 below.

[0076] Table 3. Changes in defects such as weld grain size, microhardness, tensile strength, and number of pores under different welding conditions Experimental conditions Grain size (µm) Microhardness (HV) Tensile strength (MPa) <![CDATA[Number of pores (pieces / 100mm 2 )]]> Porosity (%) Number of cracks B = 0 mT, f = 0 Hz 441 210 155 8 1.6 4 B = 2 mT, f = 0 Hz 317 305 200 6 1.2 2 B = 2 mT, f = 2500 Hz 171 517 285 2 0.6 0 In Table 3, the first row is the names of the test data for testing, the second row is the data when welding without adding any additional conditions (both the magnetic field and the vibration frequency are 0) in the comparative experiment, the third row is the data when welding after adding the magnetic field, and the fourth row is the data after adding the magnetic field and vibration simultaneously.

[0077] Taking the weld grain size in the second column of Table 3 as an example, when welding without adding any additional conditions, the maximum weld grain size is 441 μm. After adding a magnetic field, the weld grain size is also relatively large at 317 μm. When both the magnetic field and vibration are added, the weld grain size is the smallest at 171 μm. According to the Hall-Petch Relation, it can be known that the decrease in grain size will increase the yield strength (or tensile strength) of the material, resulting in better weld quality and performance.

[0078] Taking the change in weld microhardness in the third column of Table 3 as an example, when welding without adding any additional conditions, the minimum weld microhardness is 210 HV. After adding a magnetic field, the weld microhardness is 305 HV. When both the magnetic field and vibration are added, the weld microhardness is 517 HV, and the weld quality and hardness are the highest.

[0079] Taking the change in tensile properties in the fourth column of Table 3, when welding without adding any additional conditions, the minimum tensile strength is 155 Mpa. After adding a magnetic field, the tensile strength is 200 Mpa. When both the magnetic field and vibration are added, the tensile strength is 285 Mpa. The tensile strength of the weld is the highest when both the magnetic field and vibration are added.

[0080] Taking the weld defect conditions in the fifth, sixth, and seventh columns of Table 3 as an example, the weld defect conditions include the number of pores, porosity, and the number of cracks. Among them, in the comparative experiment, when welding without adding any additional conditions, the number of pores is 8, the porosity is 1.6%, and the number of cracks is 4, which are the highest among the three data. After adding a magnetic field, the number of pores is 6, the porosity is 1.2%, and the number of cracks is 2. When both the magnetic field and vibration are added, the number of pores is 2, the porosity is 0.6%, and the number of cracks is 0. Because after adding the magnetic field and vibration, the welding molten pool is affected by the dual effects of magnetic field stirring and vibration, resulting in a significant reduction in the number of pores and porosity, and no cracks are detected in the experimental tests.

[0081] Figure 7 The macroscopic schematic diagram of the weld and Figure 8 The microscopic schematic diagram of the weld have been introduced in detail and will not be elaborated here. Especially Figure 8 when both the magnetic field and vibration are added, it can be observed under the scanning electron microscope that the grain size is relatively uniform. The synergistic control of the magnetic field and vibration can achieve effective mutual cooperation to improve the welding quality. The experimental results show that it is very beneficial to the welding effect.

[0082] It should be noted that, in addition to the embodiments of the present invention described in the above specific embodiments, those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with preferred embodiments, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other alternatives or modifications that may be extended based on the claims of the present invention. To provide a deep understanding of the present invention, many specific details are included in the above description, and the present invention can also be implemented without using these details. In addition, in order to avoid confusion or obscuring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0083] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0084] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0085] Terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0086] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0087] Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, those of ordinary skill in the art should understand that the above is a further detailed description of the present invention in connection with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited only to these descriptions. Those skilled in the art can make various changes in form and detail, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A welding auxiliary device that couples a magnetic field and vibration, characterized in that, It includes a device body. There is an installation cavity inside the device body. A vibration part is arranged at a position close to the upper opening of the installation cavity. The vibration part is fixedly connected to the inner side wall of the device body. A welding platform is arranged in the middle of the vibration part. The welding auxiliary device further includes: A magnetic field generating part. The magnetic field generating part is located inside the installation cavity and below the vibration part. The magnetic field generating part includes a vibration generating column arranged in the vertical direction. An electromagnetic coil is wound and sleeved on the outer wall of the vibration generating column. The top end of the vibration generating column abuts against the bottom end of the welding platform. Permanent magnets are spacedly arranged on the outer circle of the vibration generating column. An elastic member is arranged below the vibration generating column. A base is arranged below the magnetic field generating part. One end of the elastic member abuts against the bottom of the vibration generating column, and the other end abuts against the base. Among them, an integrated welding mechanism is further arranged on the welding platform. The integrated welding mechanism is located at the geometric center of the vibration part. The integrated welding mechanism includes a clamping mechanism for clamping the workpiece to be welded. The integrated welding mechanism is located above the magnetic field generating part in the height direction and at the magnetic field center position. The moving direction of the vibration generating column and the electromagnetic coil is the same as the axis direction of the permanent magnet, and the vibration generating column can drive the vibration part and the integrated welding mechanism to couple and vibrate. And, the vibration part includes a vibration membrane. The vibration membrane is arranged in the horizontal direction. When looking at the vibration membrane from above the installation cavity, the vibration membrane is circular. Vibration membrane rings are evenly and spacedly arranged on the vibration membrane. Arc-shaped protrusions are arranged on the vibration membrane rings. And, a plurality of deformation grooves are spacedly arranged in the middle of the vibration membrane rings.

2. The welding auxiliary device for coupling magnetic field and vibration according to claim 1, wherein The permanent magnet is annular. The inner diameter of the permanent magnet is larger than the outer diameter of the vibration generating column. And along the axis direction of the vibration generating column, the length of the vibration generating column is greater than the length of the permanent magnet. And, a vibration gap is reserved between the top of the permanent magnet and the bottom of the vibration part.

3. The welding auxiliary device for coupling a magnetic field and vibration according to claim 2, wherein The base includes a first tabletop and a second tabletop. Along the height direction of the device body, the height of the first tabletop is greater than the height of the second tabletop. The vibration generating column is arranged as a hollow column. The elastic member is arranged as a spring. One end of the spring is fixedly abutted against the first tabletop, and the other end extends into the hollow column and is fixedly connected to the vibration generating column. A support seat is arranged below the permanent magnet. One end of the support seat is fixedly abutted against the second tabletop, and the other end is fixedly abutted against the bottom of the permanent magnet.

4. The welding auxiliary device for coupling a magnetic field and vibration according to claim 1, wherein The integrated welding mechanism includes a welding operation part. A plurality of temperature sensors are arranged below the welding operation part. A plurality of cooling pipes are arranged below the temperature sensors. Among them, a cooling pipe is correspondingly arranged below each temperature sensor. A flow control valve is arranged at the end of each cooling pipe. The flow control valve is externally connected to a cooling pipe. Moreover, the temperature sensor is electrically connected to the flow control valve, and the temperature value of the temperature sensor varies linearly with the flow rate of the coolant in the cooling pipe.

5. The welding auxiliary device for coupling a magnetic field and vibration according to claim 4, wherein The welding operation part is square-shaped, the temperature sensor is strip-shaped, and a plurality of the temperature sensors are uniformly and spacedly arranged on the welding operation part.

6. The welding auxiliary device for coupling a magnetic field and vibration according to claim 5, wherein A magnetic focusing edge is provided at the top of the device body, and the magnetic focusing edge is arranged as a reduced-diameter structure; Moreover, the diameter of the top opening of the magnetic focusing edge is smaller than the diameter of the vibration membrane.

7. The welding auxiliary device for coupling magnetic field and vibration according to any one of claims 1 to 6, characterized in that The clamping mechanism includes a clamping base and a plurality of movable jaws provided on the clamping base; Wherein, a plurality of movable slots are provided on the clamping base, the number of the movable slots is the same as the number of the movable jaws, each of the movable jaws is movably arranged in the movable slot, and the middle parts of the plurality of movable jaws have a clamping center for clamping a workpiece.

8. The welding auxiliary device for coupling a magnetic field and vibration according to claim 7, characterized in that The clamping base is rectangular, 4 movable slots are provided on the clamping base, the 4 movable slots are distributed along the diagonal of the clamping base, and a circular clamping slot is provided in the middle of the clamping base; Wherein, 4 movable jaws are provided, the 4 movable jaws are respectively movably arranged in the movable slots, each of the movable jaws includes a driving cylinder and a clamping part, the clamping part is located at the power output end of the driving cylinder and in the movable slot, and when the workpiece is in the clamping slot, the clamping parts of the 4 movable jaws fix and clamp the workpiece.

Images