A plate welding system using a new type of hollow magnetic concentrator

Abstract

A kind of plate welding system using new hollow magnetic concentrator, including magnetic concentrator, magnetic concentrator is provided with magnetic concentrator fixer around, magnetic concentrator and magnetic concentrator fixer are clamped between first epoxy resin pouring layer and second epoxy resin pouring layer, are connected and fixed together using bolt and nut, the bottom surface of first epoxy resin pouring layer is provided with several layers of grooves, glass fiber winding layer and several coils are clamped and fixed in groove, glass fiber winding layer is surrounded in the outer periphery of outermost coil, the most inner layer coil is communicated with the most outer layer coil and has coil terminal, busbar is arranged in the end of coil terminal, the middle of second epoxy resin pouring layer is fixed with a group of to be welded plate parts, and the bottom of to be welded plate part is supported with base;The present application realizes the accurate control to electromagnetic field, effectively saves material, improves the material utilization, reduces the energy loss, improves the welding quality and efficiency of joint, good independent heat dissipation capacity, easy to assemble, good rigidity, low manufacturing difficulty.

Description

Technical Field

[0001] This invention relates to the field of magnet collector technology, and more particularly to a plate welding system using a novel hollow magnet collector. Background Technology

[0002] Lightweight alloys, represented by aluminum alloys, have the characteristics of low density, high elastic modulus, high specific strength, high specific stiffness and corrosion resistance. They have a high application coverage in fields such as aerospace parts manufacturing and automotive structural parts manufacturing, making the processing and manufacturing of lightweight alloys a top priority. As described in the literature “Wang Junsheng, Xue Chengpeng, Wang Shuo, et al. Development and application of lightweight metals: high-strength aluminum alloys and magnesium alloys [J]. Special Casting and Nonferrous Alloys, 2023, 43(02): 145-152” and “Wang Kexue, Wang Dongbo, Huang Yong, et al. Research status of aluminum alloy materials in the field of automotive lightweighting [J]. Aluminum Processing, 2022(06): 3-6”, high-strength lightweight alloy parts can significantly reduce the weight of automobiles and other transportation vehicles. For example, a 10% reduction in the overall vehicle weight corresponds to a 6%~8% reduction in fuel consumption, and a 10% reduction in overall vehicle weight corresponds to a 4%~10% reduction in emissions; aluminum alloy wheels have only 30% of the weight of traditional carbon steel materials in the same volume. Although aluminum alloys and their alloys have significant advantages in the field of lightweighting, the complexity of their joining process is still a problem that needs to be solved. At present, the joining of aluminum alloy plates mainly relies on cold joining technologies such as riveting. While these technologies have met the technical requirements for connection strength in certain applications and are relatively mature, they still have some significant drawbacks. For example, cold joining techniques are typically complex, involve intricate structural designs, and require numerous attachments, all of which negatively impact material weight reduction goals. In aluminum alloy pipe fittings, socket welding is a common method. However, the added weight of socket joints also poses a challenge to weight reduction objectives. In contrast, electromagnetic welding technology has garnered significant attention in the field of metal workpiece joining due to its unique advantages.

[0003] Electromagnetic welding is not only a non-contact processing method but also improves the forming limits of metal materials, thereby enhancing weld quality. In the electromagnetic welding process, the magnet collector, as a key auxiliary device, plays a crucial role in promoting the development of electromagnetic welding technology and improving welding effects. However, due to the skin effect, traditional magnet collectors for sheet metal are only effectively utilized in certain areas in practical applications, leading to low material utilization and an overall unbalanced forming system. Furthermore, the solid structure of conventional magnet collectors easily causes heat accumulation, hindering the dissipation of excess heat and making it difficult to install subsequent heat dissipation auxiliary components. In traditional electromagnetic welding systems, the base supporting the sheet metal to be welded is either fixed to the upper welding system or placed below the welding system without effective positioning. These problems not only affect welding accuracy and efficiency but also increase system complexity and operational difficulty. Therefore, optimizing the structure of classic magnet collectors to improve their performance and applicability has become an urgent need for industry development. In conclusion, the joining technology for aluminum alloy materials requires further innovation and improvement to better adapt to the needs of lightweighting, improve production efficiency, reduce costs, and ensure weld quality. Future research should focus on developing new joining technologies and optimizing existing processes to enable the widespread application of aluminum alloy materials in various fields.

[0004] Currently, there are patents related to electromagnetic welding systems for plates, such as CN108500441A, which discloses a high-speed electromagnetic pulse spot welding device. This device, based on a high-conductivity material and a steel plate, includes a coil embedded in an epoxy-reinforced plate to form a cylinder, with positive and negative copper plates leading out from the terminal blocks. A flat magnetic collector and a stainless steel reinforcing plate are integrally placed under the cylinder, and the flat magnetic collector is cylindrical in shape. The flat magnetic collector is a frustum shape, wider at the top and narrower at the bottom, with a conical hole in the center. The end face of the flat magnetic collector is divided into a large end face, a small end face, and a gap face. A stainless steel plate is placed at the outer end of the flat magnetic collector and is adapted to the gap face. A high-conductivity material, an iron plate, and a base are sequentially arranged below the flat magnetic collector. This invention solves the problem of difficult welding of two sheet metal materials due to their different melting points in traditional fusion welding processes. The patented design includes a high-speed electromagnetic pulse welding device that incorporates a traditional sheet metal magnet collector within the system, fixing the magnet collector to the coil. However, in this design, the solid structure of the magnet collector results in poor heat dissipation, leading to heat accumulation during repeated discharges. Furthermore, the upper edge of the magnet collector lacks a design similar to... Figure 2 The raised structure shown cannot effectively limit the downward displacement of the magnet collector during welding; the plate to be welded below the magnet collector is not properly fixed to the welding system above, posing a risk of lateral slippage during welding. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a plate welding system using a novel hollow magnet collector, which solves the problems of current straying, excessive heat generation, poor heat dissipation, high energy loss, low material utilization, and unstable positioning and slippage of the magnet collector during the welding process in the existing magnet collector plate welding system, which leads to the inability to guarantee the quality of the welding interface.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a plate welding system using a novel hollow magnet collector, comprising a magnet collector, a magnet collector retainer arranged around the magnet collector, the magnet collector and the magnet collector retainer being sandwiched between a first epoxy resin casting layer and a second epoxy resin casting layer, and being connected and fixed together by bolts and nuts, the bottom surface of the first epoxy resin casting layer is provided with several layers of grooves, a glass fiber winding layer and several coils are fixedly inserted in the grooves, the glass fiber winding layer surrounds the outermost coil, the innermost coil and the outermost coil are connected by coil terminals, the ends of the coil terminals are provided with busbars, a set of plates to be welded is fixed in the middle of the second epoxy resin casting layer, and a base is provided on the bottom of the plates to be welded.

[0007] In a preferred embodiment, the magnet collector is a cone formed by splicing several magnet collector bodies, with the large end facing upwards. The large end is tightly attached to the first epoxy resin casting layer and is stuck inside the magnet collector holder. The bottom side of the small end is stuck inside the magnet collector holder and does not contact the upper plate of the lower plate to be welded, leaving a certain gap. The top of the magnet collector holder is tightly attached to the first epoxy resin casting layer, and the bottom is tightly attached to the second epoxy resin casting layer.

[0008] In a preferred embodiment, the upper conical large end of the magnet collector is provided with a step, the lower conical small end is provided with a cylindrical straight section, and the area of ​​the lower plane of the magnet collector is 25% or less of the area of ​​the upper plane.

[0009] In a preferred embodiment, the conical magnet collector formed by splicing the magnet collector bodies has a central hole that runs through the top and bottom. The central hole is concentric with the cone of the magnet collector body. The side walls of each magnet collector body are aligned, and a seam runs through the top and bottom at the splicing point.

[0010] In a preferred embodiment, the seam is fan-shaped, gradually narrowing towards the center of the magnet collector. The width of the widest part of the seam, i.e. the width around the outer perimeter of the magnet collector, does not exceed 1.3% of the outer perimeter of the magnet collector.

[0011] In a preferred embodiment, the magnet collector body includes an upper plate and a lower plate, which are connected and fixed together by a set of vertical ribs, and both are made of copper alloy material. The coil is also a copper coil.

[0012] In a preferred embodiment, the vertical ribs are set at the joints where the magnet bodies are joined together, and are distributed divergently along the radius of a cone. The cross-section of the vertical rib is trapezoidal, and the arc value of the thickness direction of a single vertical rib is 1 / 8 to 1 / 6 of the arc value of a single magnet body.

[0013] In a preferred embodiment, a hole is provided in the middle of the second epoxy resin casting layer, and an annular insulating gasket is provided in the hole to separate and fix a group of plates to be welded that are stuck in the hole of the second epoxy resin casting layer.

[0014] In a preferred embodiment, the first epoxy resin casting layer and the second epoxy resin casting layer are provided with a plurality of through holes evenly distributed along the circumference. Bolts and nuts are installed in the through holes to connect and fix the first epoxy resin casting layer, the second epoxy resin casting layer, the magnet collector, and the magnet collector holder together.

[0015] In a preferred embodiment, the base is closely attached to the bottom of the second epoxy resin casting layer, supports a set of plates to be welded, and is secured around the perimeter within the enclosure formed by the connecting bolts of the first and second epoxy resin casting layers.

[0016] The present invention provides a plate welding system using a novel hollow magnet collector, which has the following beneficial effects: 1. The present invention has a reasonable structural design, exquisite dimensions, and a scientific and standardized method, which realizes the precise control of electromagnetic fields; 2. The conical hollow structure of this invention effectively saves 55% or more of the material used, improves the material utilization rate, and reduces energy loss; 3. The novel plate magnet collector designed in this invention can effectively improve welding quality and has good self-heating capacity and structural strength. 4. The magnet collector designed in this invention has a simple structure, is easy to assemble, and is easy to process; 5. The hollow conical structure design of this invention further ensures that the electromagnetic force is concentrated on the lower surface of the magnet body, realizing precise control of the electromagnetic force and further improving the welding efficiency and quality of the plates. 6. The design of the magnet collector, coil, glass fiber winding, and epoxy resin casting layer in this invention further optimizes the conductivity of the magnet collector body, making its magnet collection effect better and further improving the energy utilization rate. 7. The multi-lobed assembly design of the magnet in this invention effectively improves the welding quality of the joints and has good self-heating ability. 8. The magnet collector of the present invention is designed with a boss for positioning, which effectively controls the slippage of the magnet collector; 9. The base size designed in this invention is just right to be held in place by the bolts, which restricts the displacement of the base and makes it convenient to replace the plates to be welded. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the magnet collector of the present invention; Figure 4 This is a schematic diagram of the structure of the magnet body of the present invention; Figure 5 This is a schematic diagram of the current flow direction in the magnet collector body of the present invention; In the figure: 1. Magnet collector 2. First epoxy resin casting layer 3. Second epoxy resin casting layer 4. Fiberglass winding layer 5. Coil 6. Coil terminal 7. Busbar 8. Plate to be welded 9. Base 10. Magnet collector body 11. Center hole 12. Joint 13. Upper plate 111. Lower plate 112. Vertical rib 113. Detailed Implementation

[0018] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Please see the appendix Figures 1-5 The present invention discloses a plate welding system using a novel hollow magnet collector, comprising a magnet collector 1, a magnet collector retainer 2 surrounding the magnet collector 1, the magnet collector 1 and the magnet collector retainer 2 being sandwiched between a first epoxy resin casting layer 3 and a second epoxy resin casting layer 4, and being connected and fixed together by bolts and nuts. The bottom surface of the first epoxy resin casting layer 3 is provided with several layers of grooves, in which a glass fiber winding layer 5 and several coils 6 are fixedly fitted. The glass fiber winding layer 5 surrounds the outermost coil 6, and the innermost coil 6 and the outermost coil 6 are connected by coil terminals 7. The ends of the coil terminals 7 are provided with busbars 8. A set of plates to be welded 9 is fixed in the middle of the second epoxy resin casting layer 4, and a base 10 is provided at the bottom of the plates to be welded 9.

[0020] In this embodiment, the magnet collector 1 is a cone formed by splicing several magnet collector bodies 11, with the large end facing upwards. The large end is tightly attached to the first epoxy resin casting layer 3 and is stuck in the magnet collector holder 2. The bottom side of the small end is stuck in the magnet collector holder 2. It does not contact the upper plate of the lower plate to be welded 9 and leaves a certain gap. The top of the magnet collector holder 2 is tightly attached to the first epoxy resin casting layer 3, and the bottom is tightly attached to the second epoxy resin casting layer 4. The upper conical large end of the magnet collector 1 is provided with a step, and the lower conical small end is provided with a cylindrical straight section, and the area of ​​the lower plane of the magnet collector 1 is 25% or less of the area of ​​the upper plane. The conical magnet collector 1 formed by splicing the magnet collector body 11 is provided with a central hole 12 that runs through the top and bottom. The central hole 12 is concentric with the cone of the magnet collector body 11. The side walls of the magnet collector bodies 11 are aligned with each other, and a splicing seam 13 that runs through the top and bottom is provided at the splicing point. The seam 13 is fan-shaped, gradually narrowing towards the center of the magnet collector 1. The width of the widest part of the seam 13, that is, the width on the outer perimeter of the magnet collector body 11, does not exceed 1.3% of the outer perimeter of the magnet collector body 11. The magnet collector body 11 includes an upper plate 111 and a lower plate 112. The upper plate 111 and the lower plate 112 are connected and fixed together by a set of vertical ribs 113, and both are made of copper alloy material. The coil 6 is also a copper coil. The vertical ribs 113 are set at the joint 13 where two magnet collector bodies 11 are spliced ​​together, and are distributed in a divergent manner along the radius of a cone. The vertical and side cross sections of the vertical ribs 113 are trapezoidal. The arc value of the thickness direction of a single vertical rib 113 is 1 / 8 to 1 / 6 of the arc value of a single magnet collector body 11. The slot between a group of vertical ribs 113 is a trapezoidal sweep cut on the side of the vertical rib 113. The sweep path is arc-shaped and concentric with the magnet collector body 11 and its central hole 12. The second epoxy resin casting layer 4 has a hole in the middle, and an annular insulating gasket is placed in the hole to separate and fix a group of plates 9 to be welded that are stuck in the hole of the second epoxy resin casting layer 4. The first epoxy resin casting layer 3 and the second epoxy resin casting layer 4 are evenly provided with several through holes along the circumference. Bolts and nuts are installed in the through holes to connect and fix the first epoxy resin casting layer 3, the second epoxy resin casting layer 4, the magnet collector 1 and the magnet collector fixing device 2 together. The base 10 is closely attached to the bottom of the second epoxy resin casting layer 4, supports a set of plates 9 to be welded, and is secured around the perimeter within the enclosure formed by the connecting bolts of the first epoxy resin casting layer 3 and the second epoxy resin casting layer 4.

[0021] In the specific design, the design of the magnet collector 1 for plate welding is based on the skin effect calculation to determine the thickness of the current channel that needs to be reserved during the electromagnetic forming process, while ensuring a certain structural strength; its three-dimensional model is shown below. Figure 3 As shown; the magnet collector 1 of this novel structure can be obtained by mold casting or simple cutting of the classic magnet collector 1 structure, making it easy to process; calculations show that this structure can save approximately 55% of materials; a protruding part is provided along the upper edge of the magnet collector 1 to limit its displacement; the dimensions of part of the base 10 are just enough to be held in place by bolts, as shown. Figure 2 As shown.

[0022] In practical use, after the capacitor discharges, a pulse current is generated in coil 6, and the resulting changing magnetic field induces a current in magnet collector 1. Due to the skin effect, the induced current is almost entirely concentrated within a certain depth of the surface of magnet collector 1. Because the upper and lower surfaces of magnet collector 1 form a closed loop through the side wall ribs 113, the induced current can flow. Figure 5 As shown, the upper plate of a set of plates to be welded 9 will also generate an induced current due to the influence of the changing magnetic field of the coil 6 and the magnet collector 1. Then, under the action of the Lorentz force, it will undergo rapid deformation and collide with the lower plate of the set of plates to be welded 9 at high speed, thereby completing the welding between the plates of the set of plates to be welded 9. Since the lower surface area of ​​the magnet collector 1 is smaller than the upper surface area, the current density on the lower surface is significantly higher than that on the upper surface, thereby achieving the effect of "magnetizing".

[0023] In the preferred embodiment, the magnet collector 1 is a cone formed by splicing several magnet collector bodies 11, with the large end facing upwards. The large end is tightly attached to the first epoxy resin casting layer 3 and is locked inside the magnet collector holder 2. The bottom side of the small end is locked inside the magnet collector holder 2, leaving a certain gap without contact with the upper plate of the lower plate to be welded 9. The top of the magnet collector holder 2 is tightly attached to the first epoxy resin casting layer 3, and the bottom is tightly attached to the second epoxy resin casting layer 4. The above configuration allows the magnet collector 1 to be effectively fixed, avoiding the hidden danger of lateral slippage during welding. At the same time, the magnet collector 1 adopts a cone structure spliced ​​together, with the lower end facing downwards. The plate to be welded 9 is placed below the lower end with a gap, which is more conducive to the smooth flow of induced current and forms a "magnetic field" below, thereby bringing about high-speed collision between the upper and lower plates of the plate to be welded 9 to complete the welding.

[0024] In a preferred embodiment, the upper conical large end of the magnet collector 1 is provided with a step, and the lower conical small end is provided with a cylindrical straight section, and the area of ​​the lower surface of the magnet collector 1 is 25% or less of the area of ​​the upper surface; the provision of the upper and lower steps and the straight section enables the magnet collector 1 to be effectively fixed and firmly fixed; the area of ​​the lower surface of the magnet collector 1 is 25% or less of the area of ​​the upper surface, which further concentrates the current in the magnet collector 1 to the lower surface, further improving the magnetizing effect of the lower surface.

[0025] In a preferred embodiment, the conical magnet collector 1 formed by splicing the magnet collector bodies 11 is provided with a central hole 12 that runs vertically through the magnet collector 11. The central hole 12 is concentric with the cone of the magnet collector body 11, and the side walls of each magnet collector body 11 are aligned. A vertically through seam 13 is provided at the splicing point. The above configuration further concentrates the stray current in the magnet collector 1 and overcomes the problems of excessive heat generation, poor heat dissipation performance, and large energy loss in the magnet collector 1.

[0026] In a preferred embodiment, the seam 13 is fan-shaped, gradually narrowing towards the center of the magnet collector 1. The width of the widest part of the seam 13, i.e. the width on the outer periphery of the magnet collector body 11, does not exceed 1.3% of the outer periphery of the magnet collector body 11. This configuration further improves the magnetizing effect and energy utilization of the magnet collector 1 while enhancing its heat dissipation performance.

[0027] In a preferred embodiment, the magnet collector body 11 includes an upper plate 111 and a lower plate 112. The upper plate 111 and the lower plate 112 are connected and fixed together by a set of vertical ribs 113, and both are made of copper alloy material. The coil 6 is also a copper coil. The structural design of the magnet collector body 11 further reduces the weight of the magnet collector body 11, improves the material utilization rate, and facilitates manufacturing. The use of copper alloy material for the magnet collector body 11 and copper coil 6 further improves the inductive performance of the device, thereby further improving the magnetizing effect and energy utilization rate of the device.

[0028] In a preferred embodiment, the vertical ribs 113 are positioned at the joint 13 where two magnet collector bodies 11 are joined, and are distributed radially along the radius of a cone. The vertical and side cross-sections of the vertical ribs 113 are trapezoidal. The arc value of the thickness direction of a single vertical rib 113 is 1 / 8 to 1 / 6 of the arc value of a single magnet collector body 11. The slots between a group of vertical ribs 113 are created by sweeping away trapezoidal sections from the side of the vertical ribs 113. The sweeping path is arc-shaped and concentric with the magnet collector body 11 and its central hole 12. This configuration allows the upper and lower surfaces of the magnet collector 1 to form a closed loop through the side wall vertical ribs 113, enabling the induced current to flow. At the same time, the structural design further enhances the magnetizing effect of the device, reduces material and energy losses, and thus further improves the utilization rate of materials and energy and the efficiency of welding operations.

[0029] In a preferred embodiment, the second epoxy resin casting layer 4 has a hole in the middle, and an annular insulating gasket is placed in the hole to separate and fix a group of plates 9 to be welded that are stuck in the hole of the second epoxy resin casting layer 4. The above arrangement effectively separates the lower surface of the magnetizer 1 from the plates 9 to be welded, which is conducive to the effective action of the magnetizing force of the lower surface of the magnetizer 1 on the upper plate of the plates 9 to be welded, causing it to collide with the lower plate at high speed and complete the welding work. At the same time, the surrounding epoxy resin layer and the middle insulating gasket further concentrate the electromagnetism on the magnetizer 1, thereby improving the energy utilization rate and the efficiency of the welding work.

[0030] In a preferred embodiment, the first epoxy resin casting layer 3 and the second epoxy resin casting layer 4 are evenly provided with a plurality of through holes along their circumference. Bolts and nuts are installed in the through holes to connect and fix the first epoxy resin casting layer 3, the second epoxy resin casting layer 4, the magnet collector 1, and the magnet collector holder 2 together. The above arrangement effectively fixes the magnet collector 1 to the first epoxy resin casting layer 3, the second epoxy resin casting layer 4, and the magnet collector holder 2, avoiding slippage during the welding process, thereby further improving the welding quality of the welded joint.

[0031] In a preferred embodiment, the base 10 is closely attached to the bottom of the second epoxy resin casting layer 4, supporting a set of plates 9 to be welded, and is secured around the perimeter within the enclosure formed by the connecting bolts of the first epoxy resin casting layer 3 and the second epoxy resin casting layer 4. This arrangement effectively positions the plates 9 to be welded by the base 10 and the second epoxy resin casting layer 4, while also effectively fixing the base 10 circumferentially. At the same time, it facilitates separation from the second epoxy resin casting layer 4, which is beneficial for the insertion, removal, and replacement of the plates 9 to be welded. This facilitates operation and effectively improves welding efficiency.

[0032] In summary, this invention provides a plate welding system using a novel hollow magnet collector. While ensuring the welding effect of an electromagnetic welding system with the magnet collector 1, it reduces system weight, improves energy utilization, and increases heat dissipation area by removing low-utilization parts through hollowing out the system. The displacement of the magnet collector 1 during welding is limited by designing raised steps along its upper edge and a straight section at its lower end. The innovative design of the base 10's dimensions ensures it is precisely secured by bolts, preventing displacement during welding and facilitating the replacement of the plate to be welded 9. This invention achieves precise control of the electromagnetic field, effectively saving 55% or more of material usage, improving material utilization, reducing energy loss, enhancing the welding quality and efficiency of joints, possessing excellent self-heating capabilities, a simple structure, easy assembly, low manufacturing difficulty, ample room for future upgrades, strong applicability, wide application range, and high promotional value. It has significant practical application value and good economic and social benefits.

Claims

1. A plate welding system using a novel hollow magnet collector, comprising a magnet collector (1), characterized in that: The magnet collector (1) is surrounded by magnet collector holders (2). The magnet collector (1) and magnet collector holders (2) are sandwiched between the first epoxy resin casting layer (3) and the second epoxy resin casting layer (4) and are fixed together by bolts and nuts. The bottom surface of the first epoxy resin casting layer (3) is provided with several grooves. Glass fiber winding layer (5) and several coils (6) are fixed in the grooves. The glass fiber winding layer (5) surrounds the outermost coil (6). The innermost coil (6) and the outermost coil (6) are connected by coil terminals (7). The ends of the coil terminals (7) are provided with A busbar (8) is provided, and a set of plates to be welded (9) is fixed in the middle of the second epoxy resin casting layer (4). The bottom of the plates to be welded (9) is supported by a base (10). The magnet collector (1) is a cone formed by splicing several magnet collector bodies (11). A through joint (13) is provided at the splicing point of each pair of magnet collector bodies (11). The magnet collector body (11) includes an upper plate (111) and a lower plate (112). The upper plate (111) and the lower plate (112) are connected and fixed together by a set of vertical ribs (113). The vertical ribs (113) are set at the joint (13) and are distributed divergently along the radius of the cone.

2. The plate welding system using a novel hollow magnet collector according to claim 1, characterized in that: A cone formed by splicing several magnet collector bodies (11) has its large end facing upwards. The large end is tightly attached to the first epoxy resin casting layer (3) and is stuck in the magnet collector holder (2). The bottom side of the small end is stuck in the magnet collector holder (2). It does not contact the upper plate of the lower plate to be welded (9) and leaves a certain gap. The top of the magnet collector holder (2) is tightly attached to the first epoxy resin casting layer (3), and the bottom is tightly attached to the second epoxy resin casting layer (4).

3. A plate welding system using a novel hollow magnet collector according to claim 1, characterized in that: The upper conical end of the magnet collector (1) is provided with a step, and the lower conical end is provided with a cylindrical straight section. The area of ​​the lower plane of the magnet collector (1) is 25% or less of the area of ​​the upper plane.

4. A plate welding system using a novel hollow magnet collector according to claim 1, characterized in that: The conical magnet collector (1) formed by splicing the magnet collector body (11) is provided with a central hole (12) that runs through the top and bottom. The central hole (12) is concentric with the cone of the magnet collector body (11), and the side walls of the magnet collector bodies (11) are aligned.

5. A plate welding system using a novel hollow magnet collector according to claim 1, characterized in that: The seam (13) is fan-shaped and gradually narrows from the outer periphery to the center of the magnet (1). The width of the seam (13) at its widest point, that is, the width on the outer periphery of the magnet body (11), does not exceed 1.3% of the outer periphery of the magnet body (11).

6. A plate welding system using a novel hollow magnet collector according to claim 1, characterized in that: The upper plate (111), lower plate (112) and a set of vertical ribs (113) are all made of copper alloy material, and the coil (6) is also a copper coil.

7. A plate welding system using a novel hollow magnet collector according to claim 1, characterized in that: The vertical cross section of the vertical rib (113) is trapezoidal, and the arc value of the thickness direction of a single vertical rib (113) is 1 / 8 to 1 / 6 of the arc value of a single magnet body (11).

8. A plate welding system using a novel hollow magnet collector according to claim 1, characterized in that: The second epoxy resin casting layer (4) has a hole in the middle, and an annular insulating gasket is provided in the hole to separate and fix a group of plates (9) to be welded that are stuck in the hole of the second epoxy resin casting layer (4).

9. A plate welding system using a novel hollow magnet collector according to claim 1, characterized in that: The first epoxy resin casting layer (3) and the second epoxy resin casting layer (4) are evenly provided with several through holes along the circumference. Bolts and nuts are installed in the through holes to connect and fix the first epoxy resin casting layer (3), the second epoxy resin casting layer (4), the magnet collector (1) and the magnet collector fixing device (2) together.

10. A plate welding system using a novel hollow magnet collector according to claim 1, characterized in that: The base (10) is closely attached to the bottom of the second epoxy resin casting layer (4), supports a set of plates (9) to be welded, and is secured around the perimeter within the enclosure formed by the connecting bolts of the first epoxy resin casting layer (3) and the second epoxy resin casting layer (4).

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