Reconfigurable electromagnetic pulse welding flat panel magnet set

Abstract

The application discloses a reconfigurable electromagnetic pulse welding flat plate magnet collector, which comprises a magnet collecting module, the magnet collecting module comprises a magnetic induction surface and a magnet collecting surface which are arranged at intervals, the magnetic induction surface and the magnet collecting surface are of the same shape, the area of the magnetic induction surface is larger than that of the magnet collecting surface, the magnetic induction surface and the magnet collecting surface are connected through a connecting surface arranged on a corresponding side outer ring, and one side of the magnetic induction surface and the magnet collecting surface is not provided with the connecting surface, one side of the connecting surface is arranged as a circular arc taper surface which is large at the top and small at the bottom, and the magnetic induction surface and the magnet collecting surface are both provided with a missing slot which is matched with the corresponding circular arc taper surface. The application utilizes the characteristic that the gap area of the flat plate magnet collector can generate welding marks parallel to the welding direction, adjusts the number of the magnet collecting module, controls the number of the gaps, increases the effective welding mark area of the electromagnetic pulse welding according to the needs when the electromagnetic pulse welding is used for hole flanging welding and spot welding, and thus the welding quality is improved.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic pulse technology, and specifically relates to a reconfigurable electromagnetic pulse welding plate magnet collector. Background Technology

[0002] Electromagnetic pulse welding (EPW) is a solid-state joining technology with promising applications, especially for welding dissimilar metals. In EPWM welding, the method of through-hole welding is often used to connect non-metallic interlayers, forming metal-non-metal-metal structures (such as…). Figure 1 Alternatively, spot welding can be achieved using perforated welding to reduce the welding area and number of welding operations. Perforated welding typically uses type I or type E flat coils, but their energy utilization rate is too low; while using a combination of disc-shaped multi-turn coils and flat magnet collectors can improve the electromagnetic energy utilization rate.

[0003] In existing technology, the magnet collector is approximately shaped like a solid frustum with an opening. Its main functional parts are the upper and lower end faces, the inner hole, and the gap. The diameter of the upper end face is much larger than that of the lower end face. The eddy current induced on the larger upper end face is collected through the gap to the smaller lower end face, increasing the current density and thus increasing the strength of the induced magnetic field, thereby completing the "magnetic collection" function.

[0004] Chinese patent CN113223806 discloses a hollow magnet collector for a flat multi-turn coil. By modifying the magnet collector structure, it removes the non-electromagnetic components from the interior of a traditional solid pure copper magnet collector, retaining only the main current-carrying portion. This not only saves resources but also avoids leakage current flowing through the magnet collector, preventing energy loss. Simultaneously, it increases the current density at the lower end of the magnet collector, resulting in a stronger excitation magnetic field. However, during testing and use, it was found that an opening, or gap, forms a weld mark perpendicular to the welding direction at the eddy current fracture point. Figure 2 As shown, this results in too few welds being formed when the hollow magnet is used, making it difficult to ensure reliable welding of the intermediate layer. Summary of the Invention

[0005] This invention proposes a reconfigurable electromagnetic pulse welding plate magnetizer, which can ensure reliable welding during application by increasing the weld seam.

[0006] Therefore, the technical solution adopted by the present invention is as follows: a reconfigurable electromagnetic pulse welding plate magnet collector, comprising an integrally formed magnet collecting module, wherein the magnet collecting module includes a magnetic induction surface and a magnet collecting surface arranged at intervals, the magnetic induction surface and the magnet collecting surface have the same shape and the area of ​​the magnetic induction surface is larger than that of the magnet collecting surface, the magnetic induction surface and the magnet collecting surface are connected by a connecting surface provided on the outer ring of the corresponding side, and one side of both the magnetic induction surface and the magnet collecting surface is not provided with a connecting surface, wherein the connecting surface on one side is set as a circular arc cone surface that is larger at the top and smaller at the bottom, and both the magnetic induction surface and the magnet collecting surface are provided with a notch that matches the circular arc cone surface on the corresponding side.

[0007] At least two magnetic collecting modules form a frustum or prism magnetic collecting block that is larger at the top and smaller at the bottom. The central angle of each magnetic collecting module forming the frustum or prism magnetic collecting block is set to different angles or the same angle. The connecting surface, which is set as an arc cone, forms a cone-shaped central hole located in the middle of the magnetic collecting block that is larger at the top and smaller at the bottom. Gaps are left between the other connecting surfaces and the connecting surfaces of adjacent magnetic collecting modules.

[0008] As a preferred embodiment of the above scheme, it also includes an insulating fixing ring for fixing all the magnetizing modules to form a magnetizing block, and the fixing ring is also configured as a tapered structure that is larger at the top and smaller at the bottom.

[0009] In a further preferred embodiment, a groove is provided near the upper end of the fixing ring for the magnetic induction surface to be inserted, and two adjacent magnetic collecting modules form a gap through an insulating block located between the two magnetic collecting modules.

[0010] In a further preferred embodiment, a groove is provided near the upper end of the fixing ring for the magnetic induction surface to be inserted, and a threaded mounting post is provided on the outer side of each magnetic induction surface. A ring of spaced mounting holes that penetrate the fixing ring is provided in the groove.

[0011] Further preferably, the fixing ring includes an upper top surface and a lower bottom surface, the upper top surface and the lower bottom surface are connected by an arc-shaped surface, the groove is disposed on the inner side of the upper end of the arc-shaped surface, the upper wall of the groove is connected to the inner side of the upper top surface by an arc, and the inner side of the arc-shaped surface is provided with an inclined surface extending downward from the lower end of the groove to the inner side of the lower bottom surface.

[0012] Further preferably, the thickness of the magnetic induction surface is greater than that of the magnetic collecting surface.

[0013] Further preferably, the angle between the generatrix of the connecting surface, which is set as a circular arc conical surface, and the other connecting surfaces is between 30° and 60°.

[0014] Further preferably, the angle between the generatrix of the connecting surface of the arc conical surface and the other connecting surfaces is 45°.

[0015] The beneficial effects of this invention are:

[0016] 1) Improve welding quality; by utilizing the characteristic that the gap area of ​​the flat magnetic collector can produce weld marks parallel to the welding direction, the number of gaps can be controlled by adjusting the number of magnetic collection modules, so as to increase the effective weld mark area of ​​electromagnetic pulse welding for hole welding and spot welding as needed, thereby improving welding quality. At the same time, it can also promote the application of multi-turn disc coils and reconfigurable flat magnetic collectors, and improve the electromagnetic energy utilization rate in the electromagnetic pulse welding process.

[0017] 2) Improve transmission efficiency and reduce costs; Since each magnet collecting module includes a magnetic induction surface and a magnet collecting surface, the magnetic induction surface and the magnet collecting surface are connected by a connecting surface set on the corresponding outer ring. Moreover, there is one side without a connecting surface between the magnetic induction surface and the magnet collecting surface, making the magnet collecting module a hollow structure. At the same time, it retains the eddy current loop path, and the upper surface loop is thicker, which improves the electromagnetic energy transmission efficiency between the multi-turn disc coil and the flat magnet collecting device. The remaining loop parts are thinner, reducing the weight of the flat magnet collecting device and reducing manufacturing costs.

[0018] 3) Improve the effect of flat plate magnet collector; when the angle between the generatrix of the connecting surface set as a circular arc cone and the other connecting surfaces is an acute angle and preferably 45°, the induced eddy current density of the magnet collecting surface is the highest, and the magnet collecting effect is the best at this time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the existing technology of hole welding.

[0020] Figure 2 This is a simulation diagram of the welded magnets using existing technology.

[0021] Figure 3 This is a three-dimensional illustration of the present invention. Figure 1 (Looking down from top to bottom).

[0022] Figure 4 This is a three-dimensional illustration of the present invention. Figure 2 (Looking from bottom to top).

[0023] Figure 5 This is a schematic diagram of the structure of the present invention.

[0024] Figure 6 This is a schematic diagram of the magnetic block in the present invention. Figure 1 (Looking down from top to bottom).

[0025] Figure 7 This is a schematic diagram of the magnetic block in the present invention. Figure 2 (Looking from bottom to top).

[0026] Figure 8 This is a schematic diagram of the magnetic collection module in this invention.

[0027] Figure 9This is a schematic diagram of the fixing ring in this invention.

[0028] Figure 10 This is a distribution diagram of the induced eddy currents in the magnetic collecting module during the simulation of this invention.

[0029] Attached reference numerals: magnetic collecting block-A, magnetic collecting module-1, magnetic induction surface-1a, magnetic collecting surface-1b, connecting surface-1c, center hole-2, gap-3, fixing ring-4, groove-4a, top surface-4b, bottom surface-4c, arc surface-4d, inclined surface-4e. Detailed Implementation

[0030] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0031] like Figures 3-10 As shown, a reconfigurable electromagnetic pulse welding plate magnet collector includes an integrally formed magnet collecting module 1. The magnet collecting module 1 includes a magnetic induction surface 1a and a magnet collecting surface 1b spaced vertically. The magnetic induction surface 1a and the magnet collecting surface 1b have the same shape, with the area of ​​the magnetic induction surface 1a being larger than that of the magnet collecting surface 1b. The magnetic induction surface 1a and the magnet collecting surface 1b are connected by a connecting surface 1c located on the outer ring of their respective sides. One side of each magnetic induction surface 1a and the magnet collecting surface 1b lacks a connecting surface 1c, and this connecting surface 1c is a conical surface that is larger at the top and smaller at the bottom. Both the magnetic induction surface 1a and the magnet collecting surface have notches that match the corresponding conical surface. These notches can be either frustum-shaped arc grooves extending along the conical surface or cylindrical arc grooves with the same radius as the corresponding conical surface. Because the magnetic induction surface and the magnet collecting surface are connected by a connecting surface, the magnet collecting module has a hollow structure, which helps to reduce the overall weight and lower the cost.

[0032] At least two magnetic collecting modules 1 form a frustum or prism magnetic collecting block A, which is larger at the top and smaller at the bottom. The central angles of each magnetic collecting module forming the frustum or prism magnetic collecting block are set to different angles or the same angle. The connecting surface 1c, which is set as an arc-shaped cone, forms a conical central hole 2 located in the middle of the magnetic collecting block A, which is larger at the top and smaller at the bottom. Gaps 3 are left between the other connecting surfaces 1c and the connecting surfaces 1c of adjacent magnetic collecting modules 1. By adjusting the number of magnetic collecting modules, the number of gaps can be controlled.

[0033] It also includes an insulating fixing ring 4 for fixing all the magnetic collecting modules 1 to form magnetic collecting block A, and the fixing ring 4 is also set as a conical structure with a larger top and a smaller bottom.

[0034] To fix the magnetic collecting modules, a groove 4a is provided near the upper end of the fixing ring 4 for the magnetic induction surface 1a to be inserted. Two adjacent magnetic collecting modules 1 can form a gap 3 through an insulating block located between them. The magnetic collecting modules are fixed by filling the gap with the insulating block. Alternatively, threaded mounting posts can be provided on the outer surface of each magnetic induction surface 1a. At the same time, a ring of spaced mounting holes that penetrate the fixing ring 4 is provided on the groove 4a. The threaded mounting posts are made of insulating material. During installation, the threaded mounting posts pass through the mounting holes and are locked by a nut located outside the fixing ring (not shown in the structural diagram).

[0035] Preferably, the fixing ring 4 includes an upper top surface 4b and a lower bottom surface 4c, and the upper top surface 4b and the lower bottom surface 4c are connected by an arc surface 4d. The groove 4a is provided on the inner side of the upper end of the arc surface 4d, and the upper wall of the groove 4a is connected to the inner side of the upper top surface 4b by an arc. The inner side of the arc surface 4d is provided with an inclined surface 4e that extends downward from the lower end of the groove 4a to the inner side of the lower bottom surface 4c.

[0036] To improve the electromagnetic energy conversion rate and reduce transmission losses, the thickness of the magnetic induction surface 1a is greater than that of the magnetic collecting surface 1b.

[0037] The magnet collector of this application was simulated, such as... Figure 10 As shown, it was found that when the angle between the generatrix of the connecting surface set as a circular arc cone and the other connecting surfaces is between 30° and 60°, and preferably 45°, the density of eddy currents induced on the magnetic collecting surface is the highest, that is, the magnetic collecting effect is the best.

[0038] In use, a multi-turn coil is placed above the magnetic collecting block, and then a pulse current is passed through the multi-turn coil. After the current is passed through, the current will excite a high-intensity transient electromagnetic field, which will first generate eddy currents on each magnetic induction surface. The eddy currents will flow along one side of the connecting surface of the arc conical surface to the magnetic collecting surface, and then flow back along the other side of the connecting surface of the arc conical surface to the magnetic induction surface, thus forming a loop.

[0039] In this embodiment, to facilitate fixing the magnetic collecting module, both the magnetic induction surface and the magnetic collecting surface are set as fan-shaped surfaces, and the radii of the magnetic induction surface and the magnetic collecting surface on each magnetic collecting module are correspondingly equal. The upper and lower arc radii of the connecting surface are correspondingly equal. The connecting surface of the arc conical surface is set on the inner side of the fan-shaped surface. The groove of the magnetic collecting surface can be set as a frustum-shaped arc groove extending along the arc conical surface. The groove of the magnetic induction surface is a cylindrical arc groove with the same radius as the corresponding side arc conical surface. The side without a connecting surface is the outer side of the fan-shaped surface. The magnetic collecting block formed by multiple magnetic collecting modules is a frustum-shaped cone. The central angle of the magnetic induction surface and the magnetic collecting surface can be any angle between 0° and 360°, as long as the sum of the central angles of the magnetic collecting modules that make up the magnetic collecting block is 360°.

Claims

1. A reconfigurable electromagnetic pulse welding flat panel magnet set, characterized by: The system includes a magnetic collecting module (1), which includes a magnetic induction surface (1a) and a magnetic collecting surface (1b) arranged at intervals. The magnetic induction surface (1a) and the magnetic collecting surface (1b) have the same shape, and the area of ​​the magnetic induction surface (1a) is larger than that of the magnetic collecting surface (1b). The magnetic induction surface (1a) and the magnetic collecting surface (1b) are connected by a connecting surface (1c) provided on the outer ring of the corresponding side. There is one side between the magnetic induction surface (1a) and the magnetic collecting surface (1b) that does not have a connecting surface (1c). The connecting surface (1c) on one side is set as a circular arc cone surface that is larger at the top and smaller at the bottom. Both the magnetic induction surface (1a) and the magnetic collecting surface (1b) are provided with a notch that matches the circular arc cone surface on the corresponding side. At least two magnetic collecting modules (1) form a frustum or prism magnetic collecting block (A) with a larger top and a smaller bottom. The central angle of each magnetic collecting module forming the frustum or prism magnetic collecting block is set to different angles or the same angle. The connecting surface (1c) of the circular arc cone surface forms a conical central hole (2) located in the middle of the magnetic collecting block (A) with a larger top and a smaller bottom. The remaining connecting surfaces (1c) are separated from the connecting surfaces (1c) of the adjacent magnetic collecting modules (1) by gaps (3). It also includes an insulating fixing ring (4) for fixing all the magnetic collecting modules (1) to form a magnetic collecting block (A). The fixing ring (4) is also set as a tapered structure with a larger top and a smaller bottom. A groove (4a) is provided in the fixing ring (4) near its upper end for the magnetic induction surface (1a) to be inserted. Each magnetic induction surface (1a) has a threaded mounting post on its outer side. A ring of mounting holes is provided on the groove (4a) that are spaced apart and penetrate the fixing ring (4). The fixing ring (4) includes an upper top surface (4b) and a lower bottom surface (4c). The upper top surface (4b) and the lower bottom surface (4c) are connected by an arc surface (4d). The groove (4a) is provided on the inner side of the upper end of the arc surface (4d). The upper wall of the groove (4a) and the inner side of the upper top surface (4b) are connected by an arc. The inner side of the arc surface (4d) is provided with an inclined surface (4e) that extends downward from the lower end of the groove (4a) to the inner side of the lower bottom surface (4c).

2. The reconfigurable electromagnetic pulse welding flat panel magnetizer of claim 1, wherein: Two adjacent magnetic collecting modules (1) form a gap (3) through an insulating block located between the two magnetic collecting modules (1).

3. The reconfigurable electromagnetic pulse welding flat panel magnetizer of claim 1, wherein: The thickness of the magnetic induction surface (1a) is greater than that of the magnetic collecting surface (1b).

4. The reconfigurable electromagnetic pulse welding plate magnet collector according to claim 1, characterized in that: The angle between the generatrix of the connecting surface, which is set as a circular arc cone, and the other connecting surfaces is between 30° and 60°.

5. The reconfigurable electromagnetic pulse welding plate magnet collector according to claim 4, characterized in that: The angle between the generatrix of the connecting surface, which is set as a circular arc cone, and the other connecting surfaces is 45°.

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