Three-dimensional magnetic field auxiliary laser welding device for aluminum-based silicon carbide

Abstract

The invention discloses a three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide. The three-dimensional magnetic field assisted laser welding device comprises a welding platform, a swing laser head, a feeding mechanism and a three-dimensional magnetic field generating mechanism, the swing laser head is arranged above the welding platform and points to a welding seam of the aluminum-based silicon carbide plate to be welded; the feeding mechanism is arranged above the welding platform, the output end of the feeding mechanism points to a welding seam of the aluminum-based silicon carbide plate to be welded, and the feeding mechanism is used for feeding reinforcing phase particles to the welding seam of the aluminum-based silicon carbide plate to be welded; the three-dimensional magnetic field generation mechanism is arranged below the welding platform and can continuously generate a longitudinal magnetic field, a spanwise magnetic field and a vertical magnetic field, and the longitudinal magnetic field, the spanwise magnetic field and the vertical magnetic field are arranged in a pairwise orthogonal mode. The problems that when the laser welding technology is applied to the aluminum-based silicon carbide thick plate, the liquidity of a molten pool is prone to being poor, reinforced phase particles are not evenly distributed, and consequently the performance of a welding structure is deteriorated can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum-based silicon carbide plate welding, and in particular to a three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide. Background Art

[0002] Laser welding, as a high-energy beam welding technology, effectively reduces post-weld residual stress and weld distortion in components thanks to its concentrated heat source. Furthermore, its high welding speed significantly improves production efficiency. With the gradual industrialization of high-power, high-beam-quality lasers and related equipment, the applicability of laser welding technology in the forming of medium- and thick-plate structural components has been significantly improved.

[0003] When laser welding technology is applied to the welding of aluminum-based silicon carbide thick plates (thickness ≥ 8mm), poor molten pool fluidity and uneven distribution of reinforcement phase particles are generally prone to occur, resulting in deterioration of the performance of the welded structure.

[0004] In order to improve the above problems, the patent application number CN202210455279.7 discloses a device for composite welding of silicon carbide reinforced aluminum-based composite materials, which first forms a basic weld by laser welding, and then increases the weld width and homogenizes the distribution of the reinforcing phase by stir friction welding, but it cannot improve the problem of poor fluidity of the molten pool of thick plate welds; the patent application number CN202210924200.0 discloses a magnetic field-assisted laser welding platform based on magnetic field morphology simulation design, which realizes plasma drive through a U-shaped directional magnetic field generating device to regulate the flow characteristics in the molten pool along the parallel welding direction. The regulation direction is single and the regulation effect is general; the patent application number CN202410166596.6 discloses a magnetic field-assisted welding system, which adds a variable direction magnetic field to the swinging laser head, but its variable angle is limited by the maximum stroke allowed by the swinging laser head, and the swinging laser and the magnetic field cannot be decoupled, resulting in unsatisfactory regulation effect.

[0005] In view of this, this application is hereby filed. Summary of the Invention

[0006] The purpose of the present invention is to provide a three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide, so as to solve the problem that when laser welding technology is applied to aluminum-based silicon carbide thick plates, poor molten pool fluidity and uneven distribution of reinforcing phase particles are easily encountered, resulting in deterioration of welding structure performance.

[0007] The present invention is achieved through the following technical solutions: A three-dimensional magnetic field-assisted laser welding device for aluminum-based silicon carbide, comprising: a welding platform, the top surface of the welding platform is used to place the aluminum-based silicon carbide plate to be welded; an oscillating laser head, the oscillating laser head is arranged above the welding platform, the oscillating laser head points to the weld of the aluminum-based silicon carbide plate to be welded, and is used to weld the aluminum-based silicon carbide plate to be welded; a feeding mechanism, the feeding mechanism is arranged above the welding platform, the output end of the feeding mechanism points to the weld of the aluminum-based silicon carbide plate to be welded, and is used to supply reinforcing phase particles to the weld of the aluminum-based silicon carbide plate to be welded; a three-dimensional magnetic field generating mechanism, the three-dimensional magnetic field generating mechanism is arranged below the welding platform, the three-dimensional magnetic field generating mechanism can continuously generate a longitudinal magnetic field, a spanwise magnetic field and a vertical magnetic field, and the longitudinal magnetic field, the spanwise magnetic field and the vertical magnetic field are arranged orthogonally in pairs.

[0008] Optionally, the three-dimensional magnetic field generating mechanism includes an excitation power supply and a weak magnetic loss metal frame; the weak magnetic loss metal frame is arranged directly below the weld of the aluminum-based silicon carbide plate to be welded; the weak magnetic loss metal frame is orthogonally wound with a plurality of longitudinal coils, a plurality of span coils and a plurality of vertical coils; the excitation power supply is electrically connected to the longitudinal coil, the span coil and the vertical coil respectively.

[0009] Optionally, the weak magnetic loss metal frame includes two longitudinal coil frames, two span coil frames and two vertical coil frames, and the longitudinal coil frames, the span coil frames and the vertical coil frames are orthogonally connected in pairs; each of the longitudinal coil frames is circumferentially wound around the outer edge of one longitudinal coil; each of the span coil frames is circumferentially wound around the outer edge of one span coil; each of the vertical coil frames is circumferentially wound around the outer edge of one vertical coil.

[0010] Optionally, the plane where the longitudinal ring frame is located is perpendicular to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded, and is perpendicular to the welding platform; the plane where the span-wise ring frame is located is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded, and is perpendicular to the welding platform; the plane where the vertical ring frame is located is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded, and is parallel to the welding platform.

[0011] Optionally, the longitudinal circle frame, the span-wise circle frame and the vertical circle frame are all rectangular frames; the longitudinal circle frame, the span-wise circle frame and the vertical circle frame are orthogonally nested and connected in pairs to form the weak magnetic loss metal frame with a rectangular parallelepiped frame structure.

[0012] Optionally, the longitudinal coil frame, the spanwise coil frame and the vertical coil frame are all provided with wire grooves along the circumferential direction, and the longitudinal coil, the spanwise coil and the vertical coil are all embedded in the wire grooves.

[0013] Optionally, the distance between the weak magnetic loss metal frame and the welding platform is ≤6 mm.

[0014] Optionally, a bottom translation pair is provided at the bottom of the weak magnetic loss metal frame, and the bottom translation pair can translate linearly, and the translation direction is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded.

[0015] Optionally, the oscillating laser head is connected to a first top translation pair, and the first top translation pair can be linearly translated, and the translation direction is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded.

[0016] Optionally, the feeding mechanism is in the shape of an inclined slide, the bottom end of the feeding mechanism is the output end, and the feeding mechanism is connected to a second top translation pair, which can be linearly translated, and the translation direction is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention provides a three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide. By arranging a welding platform, a swinging laser head and a feeding mechanism, the positional relationship of the three is set. The welding platform carries the aluminum-based silicon carbide plates to be welded, and the laser head is used to laser weld the aluminum-based silicon carbide plates to be welded, and the feeding mechanism is used to supply reinforcing phase particles in the weld pool. On this basis, a three-dimensional magnetic field generating mechanism is set and located below the welding platform. The longitudinal magnetic field, the span magnetic field and the vertical magnetic field are continuously generated in pairs orthogonally. The magnetic fields in the three directions act on the weld pool, and the Lorentz force in each flow direction is formed in the weld pool, driving the weld to melt. The plasma in the pool flows longitudinally, spanwise and vertically, thereby effectively improving the fluidity of the molten pool and the uniformity of the distribution of the reinforcing phase particles in the weld molten pool, comprehensively regulating the microstructure of the weld joint and optimizing the mechanical properties of the weld joint; and the motion relationship between the oscillating laser head and the three-dimensional magnetic field generating mechanism is not bound, effectively avoiding the problem that the two cannot be adjusted independently due to coupling; through the mutual coordination of the above-mentioned features, the three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide can effectively solve the problem of poor molten pool fluidity and uneven distribution of reinforcing phase particles when laser welding technology is applied to aluminum-based silicon carbide thick plates, which leads to deterioration of the performance of the welding structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 A schematic front view of a three-dimensional magnetic field-assisted laser welding device for aluminum-based silicon carbide provided by an embodiment of the present invention; Figure 2 A schematic diagram of a three-dimensional magnetic field generating mechanism of a three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide provided by an embodiment of the present invention.

[0019] Markings and corresponding parts names in the accompanying drawings: 1-aluminum-based silicon carbide plate to be welded; 10-welding platform; 20-oscillating laser head; 30-feeding mechanism; 40-three-dimensional magnetic field generating mechanism; 41-excitation power supply; 42-weak magnetic loss metal frame; 421-longitudinal ring frame; 422-spanwise ring frame; 423-vertical ring frame; 43-longitudinal coil; 44-spanwise coil; 45-vertical coil; 46-bottom translation pair. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0021] Please refer to Figure 1 and Figure 2 , an embodiment of the present invention provides a three-dimensional magnetic field-assisted laser welding device for aluminum-based silicon carbide, comprising: a welding platform 10, the top surface of the welding platform 10 is used to place the aluminum-based silicon carbide plate 1 to be welded; a second includes an oscillating laser head 20, the oscillating laser head 20 is arranged above the welding platform 10, the oscillating laser head 20 points to the weld of the aluminum-based silicon carbide plate 1 to be welded, and is used to implement welding of the aluminum-based silicon carbide plate 1 to be welded; a third includes a feeding mechanism 30, the feeding mechanism 30 is arranged above the welding platform 10, the output end of the feeding mechanism 30 points to the weld of the aluminum-based silicon carbide plate 1 to be welded, and is used to supply reinforcing phase particles to the weld of the aluminum-based silicon carbide plate 1 to be welded; a fourth includes a three-dimensional magnetic field generating mechanism 40, the three-dimensional magnetic field generating mechanism 40 is arranged below the welding platform 10, the three-dimensional magnetic field generating mechanism 40 can continuously generate a longitudinal magnetic field, a spanwise magnetic field and a vertical magnetic field, and the longitudinal magnetic field, the spanwise magnetic field and the vertical magnetic field are arranged orthogonally in pairs.

[0022] The three-dimensional magnetic field-assisted laser welding device for aluminum-based silicon carbide provided in this embodiment is provided with a welding platform 10, an oscillating laser head 20 and a feeding mechanism 30, and the positional relationship of the three is set. The welding platform 10 carries the aluminum-based silicon carbide plate 1 to be welded, and the oscillating laser head 20 performs laser welding on the aluminum-based silicon carbide plate 1 to be welded, and the feeding mechanism 30 supplies reinforcing phase particles into the weld pool. On this basis, a three-dimensional magnetic field generating mechanism 40 is provided and located below the welding platform 10. The longitudinal magnetic field, the span magnetic field and the vertical magnetic field are continuously generated in pairs orthogonally. The magnetic fields in the three directions act on the weld pool to form Lorentz forces in each flow direction in the weld pool. , driving the plasma in the weld molten pool to flow longitudinally, spanwise and vertically, thereby effectively improving the fluidity of the molten pool, and effectively improving the distribution uniformity of the reinforcing phase particles in the weld molten pool, comprehensively regulating the microstructure of the weld joint, and optimizing the mechanical properties of the weld joint; and the motion relationship between the oscillating laser head 20 and the three-dimensional magnetic field generating mechanism 40 is not bound, effectively avoiding the problem that the two cannot be adjusted independently due to coupling; through the mutual cooperation of the above-mentioned features, the three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide can effectively solve the problem that when the laser welding technology is applied to aluminum-based silicon carbide thick plates, the molten pool fluidity is poor and the reinforcing phase particles are unevenly distributed, resulting in deterioration of the welding structure performance.

[0023] In order to further explain the specific structure of the three-dimensional magnetic field generating mechanism 40, the three-dimensional magnetic field generating mechanism 40 includes an excitation power supply 41 and a weak magnetic loss metal frame 42; the weak magnetic loss metal frame 42 is arranged directly below the weld of the aluminum-based silicon carbide plate 1 to be welded; the weak magnetic loss metal frame 42 is orthogonally wound with a plurality of longitudinal coils 43, a plurality of span coils 44 and a plurality of vertical coils 45; the excitation power supply 41 is electrically connected to the longitudinal coil 43, the span coil 44 and the vertical coil 45 respectively.

[0024] In order to further explain the specific structure of the weak magnetic loss metal frame 42, the weak magnetic loss metal frame 42 includes two longitudinal coil frames 421, two span coil frames 422 and two vertical coil frames 423. The longitudinal coil frames 421, the span coil frames 422 and the vertical coil frames 423 are orthogonally connected in pairs; each of the longitudinal coil frames 421 is circumferentially wound with a longitudinal coil 43; each of the span coil frames 422 is circumferentially wound with a span coil 44; and each of the vertical coil frames 423 is circumferentially wound with a vertical coil 45.

[0025] It should be noted that the longitudinal ring frame 421, the span-wise ring frame 422 and the vertical ring frame 423 are similar in shape and size, but the size relationship does not need to be limited, as long as they can be effectively orthogonally connected. Preferably, a layered nesting method can effectively improve the support performance and stability of the structure.

[0026] In order to explain the specific directions of the longitudinal circle frame 421, the span circle frame 422 and the vertical circle frame 423, the plane where the longitudinal circle frame 421 is located is perpendicular to the extension direction of the weld of the aluminum-based silicon carbide plate 1 to be welded, and is perpendicular to the welding platform 10; the plane where the span circle frame 422 is located is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate 1 to be welded, and is perpendicular to the welding platform 10; the plane where the vertical circle frame 423 is located is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate 1 to be welded, and is parallel to the welding platform 10.

[0027] In order to further explain the specific structures of the longitudinal ring frame 421, the span-wise ring frame 422 and the vertical ring frame 423, the longitudinal ring frame 421, the span-wise ring frame 422 and the vertical ring frame 423 are all rectangular frames; the longitudinal ring frame 421, the span-wise ring frame 422 and the vertical ring frame 423 are orthogonally connected in pairs to form the weak magnetic loss metal frame 42 with a rectangular frame structure.

[0028] To facilitate coil winding, the longitudinal coil frame 421 , the spanwise coil frame 422 and the vertical coil frame 423 are all provided with wire grooves along the circumferential direction, and the longitudinal coil 43 , the spanwise coil 44 and the vertical coil 45 are all embedded in the wire grooves.

[0029] Preferably, the distance between the weak magnetic loss metal frame 42 and the welding platform 10 is ≤6 mm.

[0030] In order to enable the weak magnetic loss metal frame 42 to be adaptively adjusted according to the specific welding position, a bottom translation pair 46 is provided at the bottom of the weak magnetic loss metal frame 42. The bottom translation pair 46 can be linearly translated, and the translation direction is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate 1 to be welded.

[0031] In order to enable the oscillating laser head 20 to move along the extension direction of the weld, the oscillating laser head 20 is connected to a first top translation pair (not shown in the figure). The first top translation pair can translate linearly, and the translation direction is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate 1 to be welded.

[0032] In order to enable the feeding mechanism 30 to move along the extension direction of the weld, the feeding mechanism 30 is in the shape of an inclined slide, the bottom end of the feeding mechanism 30 is the output end, and the feeding mechanism 30 is connected to a second top translation pair (not shown in the figure), which can be linearly translated, and the translation direction is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate 1 to be welded.

[0033] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide, characterized in that: include: A welding platform (10), the top surface of the welding platform (10) being used to place the aluminum-based silicon carbide plate to be welded; an oscillating laser head (20), the oscillating laser head (20) being arranged above the welding platform (10), the oscillating laser head (20) being directed toward the weld seam of the aluminum-based silicon carbide plate to be welded, and being used to weld the aluminum-based silicon carbide plate to be welded; A feeding mechanism (30), the feeding mechanism (30) being arranged above the welding platform (10), the output end of the feeding mechanism (30) being directed toward the weld seam of the aluminum-based silicon carbide plate to be welded, and being used for supplying reinforcement phase particles to the weld seam of the aluminum-based silicon carbide plate to be welded; A three-dimensional magnetic field generating mechanism (40) is provided below the welding platform (10), and the three-dimensional magnetic field generating mechanism (40) is capable of continuously generating a longitudinal magnetic field, a spanwise magnetic field, and a vertical magnetic field, wherein the longitudinal magnetic field, the spanwise magnetic field, and the vertical magnetic field are arranged orthogonally in pairs.

2. The three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide according to claim 1, characterized in that: The three-dimensional magnetic field generating mechanism (40) includes an excitation power supply (41) and a weak magnetic loss metal frame (42); The weak magnetic loss metal frame (42) is arranged directly below the weld of the aluminum-based silicon carbide plate to be welded; The weak magnetic loss metal frame (42) is orthogonally wound with a plurality of longitudinal coils (43), a plurality of span-wise coils (44), and a plurality of vertical coils (45); The excitation power supply (41) is electrically connected to the longitudinal coil (43), the span coil (44), and the vertical coil (45), respectively.

3. The three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide according to claim 2, characterized in that: The weak magnetic loss metal frame (42) comprises two longitudinal ring frames (421), two span-wise ring frames (422) and two vertical ring frames (423), wherein the longitudinal ring frames (421), the span-wise ring frames (422) and the vertical ring frames (423) are orthogonally connected in pairs; A longitudinal coil (43) is circumferentially wound around the outer edge of each longitudinal coil frame (421); A span-wise coil (44) is circumferentially wound around the outer edge of each span-wise coil frame (422); A vertical coil (45) is circumferentially wound around the outer edge of each vertical coil frame (423).

4. The three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide according to claim 3, characterized in that: The plane where the longitudinal ring frame (421) is located is perpendicular to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded, and is also perpendicular to the welding platform (10); The plane where the span-wise ring frame (422) is located is arranged parallel to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded, and is arranged perpendicular to the welding platform (10); The plane where the vertical ring frame (423) is located is arranged parallel to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded, and is also arranged parallel to the welding platform (10).

5. The three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide according to claim 4, characterized in that: The longitudinal circle frame (421), the span-wise circle frame (422) and the vertical circle frame (423) are all rectangular frames; The longitudinal ring frame (421), the span-wise ring frame (422), and the vertical ring frame (423) are orthogonally nested and connected in pairs to form the weak magnetic loss metal frame (42) of a rectangular parallelepiped frame structure.

6. The three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide according to claim 3, characterized in that: The longitudinal coil frame (421), the span-direction coil frame (422) and the vertical coil frame (423) are all provided with wire grooves along the circumferential direction, and the longitudinal coil (43), the span-direction coil (44) and the vertical coil (45) are all embedded in the wire grooves.

7. The three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide according to claim 2, characterized in that: The distance between the weak magnetic loss metal frame (42) and the welding platform (10) is ≤6 mm.

8. The three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide according to claim 2, characterized in that: A bottom translation pair (46) is provided at the bottom of the weak magnetic loss metal frame (42); the bottom translation pair (46) is capable of linear translation, and the translation direction is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded.

9. The three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide according to claim 1, characterized in that: The oscillating laser head (20) is connected to a first top translation pair, the first top translation pair is capable of linear translation, and the translation direction is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded.

10. The three-dimensional magnetic field assisted laser welding device for aluminum-based silicon carbide according to claim 1, characterized in that: The feeding mechanism (30) is in the shape of an inclined slideway, the bottom end of the feeding mechanism (30) is the output end, and the feeding mechanism (30) is connected to a second top translation pair, the second top translation pair is capable of linear translation, and the translation direction is parallel to the extension direction of the weld of the aluminum-based silicon carbide plate to be welded.

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