Slotting type rapid lap joint longitudinal magnetic furnace frame and longitudinal magnetic heat treatment method thereof

Abstract

The invention relates to the technical field of longitudinal magnetic furnace frames, in particular to a slotted quick-lap-joint longitudinal magnetic furnace frame which is characterized in that a plurality of first grooves are formed in a first fixing plate, a plurality of second grooves in one-to-one correspondence with the first grooves are formed in a second fixing plate, and a supporting conducting rod is used for placing a magnetic core; each supporting conducting rod simultaneously penetrates through one first groove and one second groove which are correspondingly arranged, the input conducting rod and the output conducting rod are arranged on the first fixing plate, and one end of each supporting conducting rod is connected to the input conducting rod or the output conducting rod in series or in parallel through a first copper bar. And the other ends of the supporting conducting rods are correspondingly connected in series or in parallel through a second copper bar. According to the invention, by designing a plurality of groups of positioning grooves and matched lap joint structural members, rapid assembly and batch production of the magnetic cores are realized; according to the structure, the assembling position can be flexibly adjusted according to the size of the magnetic core, the performance of the magnetic core can be ensured by selecting the current flowing mode, and the stability and the production efficiency of the longitudinal magnetic furnace heat treatment process can be improved.

Description

Technical Field

[0001] This invention relates to the field of longitudinal magnetic furnace frame technology, and in particular to a slotted, quick-assembly longitudinal magnetic furnace frame and its longitudinal magnetic heat treatment method. Background Technology

[0002] Longitudinal magnetic heat treatment is one of the key processes for improving the performance of soft magnetic materials. By applying a magnetic field along the material's axis and then performing heat treatment, the orientation of magnetic domains can be effectively controlled, reducing core loss and increasing permeability. This process is widely used in the final heat treatment stage of various high-performance magnetic cores. During longitudinal magnetic heat treatment, the magnetic core is usually heated and cooled while suspended on a rod to ensure that the direction of the magnetic field is consistent with the core axis and to avoid deformation caused by its own weight or improper support.

[0003] Currently, commonly used longitudinal magnetic furnace frames mostly employ perforated plates with bolted fixing structures, which suffer from low installation efficiency and limited versatility. Especially during small-batch production of different sizes, traditional furnace frames are difficult to adjust, hindering the rapid assembly and removal of magnetic cores. Furthermore, the furnace frame may experience slight deformation due to thermal stress during heat treatment, affecting the uniformity of heating of the magnetic cores and ultimately leading to a decline in core performance. Therefore, there is an urgent need for a longitudinal magnetic furnace frame that is simple in structure, easy to assemble and disassemble, and widely adaptable. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a slotted, quick-assembly longitudinal magnetic furnace frame and a longitudinal magnetic heat treatment method thereof, so as to meet the requirements of high-performance and high-efficiency longitudinal magnetic heat treatment process.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a slotted, quick-assembly longitudinal magnetic furnace frame, including a first fixed plate, a second fixed plate, supporting conductive rods, an input conductive rod, and an output conductive rod. The first fixed plate has a plurality of first slots, and the second fixed plate has a plurality of second slots corresponding one-to-one with the plurality of first slots. The supporting conductive rods are used to place magnetic cores, and each supporting conductive rod passes through a corresponding first slot and a corresponding second slot. The input conductive rod and the output conductive rod are disposed on the first fixed plate. One end of each supporting conductive rod is connected in series or parallel to the input conductive rod or the output conductive rod through a first copper busbar, and the other end of each supporting conductive rod is connected in series or parallel through a corresponding second copper busbar. The number of supporting conductive rods, their placement on the furnace frame, and the connection method of the circuit can be flexibly selected according to actual production needs.

[0006] The connection points of the input conductive rod, the output conductive rod, and the first fixed plate can all be clamped and secured from both sides of the first fixed plate by two nuts. To further enhance the strength of the connection, welding is performed at the contact points between the nuts, the input conductive rod, the output conductive rod, and the first fixed plate. As a special type of longitudinal magnetic furnace frame, this invention can avoid uneven heating and component damage caused by poor contact and current shunting during current conduction. It can also simplify the assembly process of the longitudinal magnetic furnace frame, reduce redundant pre-processing steps such as insulation and fixing, and lower the production and assembly costs of the equipment.

[0007] As a further aspect of the present invention, the supporting conductive rod is sleeved within a ceramic gasket in the corresponding first or second slot. The insulation effect of the ceramic gasket prevents current shunting. The slotted structure design allows the supporting conductive rod to pass directly through the magnetic core, be fitted with the ceramic gasket, and then placed as a whole in the first or second slot. This eliminates the need for the traditional perforated assembly method of the furnace frame, which requires inserting one end of the conductive rod into the furnace frame hole, fitting the magnetic core, and then inserting the other end into the corresponding furnace frame hole. Furthermore, depending on the current required by each conductive rod, it can be flexibly connected in series or parallel, improving the efficiency of batch production of the furnace frame.

[0008] As a further embodiment of the present invention, both the first groove and the second groove are arranged in a centrally symmetrical manner.

[0009] As a further embodiment of the present invention, the diameters of the first and second grooves are 14-18 mm, the inner diameter of the ceramic gasket is 14-18 mm, and the outer diameter of the supporting conductive rod is 8-12 mm. The supporting conductive rod can be replaced according to the inner diameter of the magnetic core, and the ceramic gasket can be replaced accordingly.

[0010] As a further embodiment of the present invention, the ceramic gasket is a hollow cylindrical structure with a T-shaped longitudinal section. When the ceramic gasket is placed, the T-shaped head extends outward from the first or second groove. Both the first and second copper busbars are positioned on the outside of the ceramic gasket. The T-shaped head of the ceramic gasket is fixedly clamped between the corresponding copper busbar and the corresponding first or second fixing plate by the fixing member of the supporting conductive rod, thus simply and effectively preventing the ceramic gasket from sliding or shifting.

[0011] As a further embodiment of the present invention, the length of the supporting conductive rod is 1000-1200mm. A longer supporting conductive rod can accommodate multiple magnetic cores, but when the number of magnetic cores increases, the number of supporting conductive rods needs to be increased.

[0012] As a further embodiment of the present invention, there are multiple first copper busbars and second copper busbars with the same structure, each including a first interface and a second interface. The fixing component between the first copper busbar or the second copper busbar and the supporting conductive rod is a nut. For compatibility, the diameter of the first interface and the second interface is 8-12mm.

[0013] As a further embodiment of the present invention, both the first fixing plate and the second fixing plate are fixedly connected to a base at their bottom, and the base has a fixing hole.

[0014] A longitudinal magnetic heat treatment method based on a slotted, quick-assembly longitudinal magnetic furnace frame involves fitting a support conductive rod onto the magnetic core to be subjected to longitudinal magnetic heat treatment, then reinstalling it onto the longitudinal magnetic furnace frame. The longitudinal magnetic furnace frame is then connected in series or parallel as needed. Subsequently, the longitudinal magnetic furnace frame is transferred and fixed inside the longitudinal magnetic furnace. The power supply lines on the longitudinal magnetic furnace are connected to the corresponding input and output conductive rods. After closing the furnace door, process parameters are set: temperature 280-460℃, current 70-200A. The longitudinal magnetic furnace adaptively heats up and then cools down, while simultaneously applying longitudinal magnetization. When the furnace temperature drops to the exit temperature of 200-210℃, the slotted, quick-assembly longitudinal magnetic furnace frame is removed from the longitudinal magnetic furnace.

[0015] As a further aspect of the present invention, the step of reinstalling the supporting conductive rod back into the longitudinal magnetic furnace frame further includes fitting the supporting conductive rod into a ceramic gasket in the corresponding first groove or second groove.

[0016] Because the present invention adopts the above technical solution, the advantages and positive effects of the present invention are as follows: by designing multiple sets of positioning slots and matching overlapping structural components, rapid and flexible assembly and mass production of magnetic cores can be achieved according to production needs; this structure can not only flexibly adjust the assembly position according to the size of the magnetic core, but also select the current flow method to ensure the performance of the magnetic core, which helps to improve the stability and production efficiency of the longitudinal magnetic furnace heat treatment process. Attached Figure Description

[0017] Figure 1 This is the front view of Embodiment 1 of the present invention.

[0018] Figure 2 This is a right view of Embodiment 1 of the present invention.

[0019] Figure 3 This is a top view of Embodiment 1 of the present invention.

[0020] Figure 4 This is a bottom view of Embodiment 1 of the present invention.

[0021] Figure 5 This is the front view of Embodiment 2 of the present invention.

[0022] Figure 6 This is a right view of Embodiment 2 of the present invention.

[0023] Figure 7 This is a top view of Embodiment 2 of the present invention.

[0024] Figure 8 This is a bottom view of Embodiment 2 of the present invention.

[0025] In the diagram: 1 is the first fixing plate, 2 is the second fixing plate, 3 is the base, 4 is the first copper busbar, 5 is the input conductive rod, 6 is the output conductive rod, 7 is the ceramic gasket, 8 is the supporting conductive rod, 9 is the first slot, 10 is the second slot, 11 is the second copper busbar, 12 is the magnetic core, and 13 is the fixing hole. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] like Figures 1-4 As shown, two supporting conductive rods are connected in series: one supporting conductive rod 8 for placing the magnetic core passes through a first slot 9 of the first fixing plate 1, and the other supporting conductive rod 8 passes through a corresponding second slot 10 of the second fixing plate 2. Furthermore, the supporting conductive rod 8 is sleeved within a ceramic gasket 7 in the corresponding first or second slot. The ceramic gasket 7 is a hollow cylindrical structure with a "T"-shaped longitudinal section. The T-shaped head of the ceramic gasket is fixed and clamped between the corresponding copper busbar and the corresponding first or second fixing plate by the fixing components of the supporting conductive rod, effectively preventing the ceramic gasket from sliding or shifting.

[0029] One end of each of the two supporting conductive rods 8 is connected to the first interface of the two first copper busbars 4, and the other end of one of the supporting conductive rods 8 is connected to the first interface of the second copper busbar 11. The second interfaces of the two first copper busbars 4 are connected to the input conductive rod 5 and the output conductive rod 6, respectively. The other end of the other supporting conductive rod 8 is connected to the second interface of the second copper busbar 11, forming a series circuit.

[0030] In this embodiment, each conductive rod is a threaded rod. The connection points of the input conductive rod 5, the output conductive rod 6 and the first fixing plate 1 can be clamped and secured from both sides of the first fixing plate 1 by two nuts. To further improve the connection's firmness, welding is performed at the contact points between the nuts, the input conductive rod 5, the output conductive rod 6 and the first fixing plate 1. The fixing parts of the first copper busbar or the second copper busbar and the supporting conductive rod are also nuts, ensuring the reliability of the connection between the copper busbar, the supporting conductive rod, the ceramic gasket and the fixing plate and the ease of operation.

[0031] Multiple slots are provided in the first and second sections to accommodate the installation of multiple copper rods, thereby improving the efficiency of batch production operations of the furnace frame. In this embodiment, the first and second slots are arranged symmetrically at the center to improve the balance of the furnace frame.

[0032] Replace the supporting conductive rod according to the inner diameter of the magnetic core and production requirements, and correspondingly replace the appropriate ceramic gasket and copper busbar. Preferably, the diameter of the first and second slots is 14-18mm, the inner diameter of the ceramic gasket is 14-18mm, and the outer diameter of the supporting conductive rod is 8-12mm. The length of the supporting conductive rod is 1000-1200mm. The diameter of the first and second interfaces of the copper busbar is 8-12mm.

[0033] Both the first fixing plate 1 and the bottom 2 of the second fixing plate are fixedly connected to a base 13. The base 13 has a fixing hole to facilitate the installation of the furnace frame into the longitudinal magnetic furnace.

[0034] Preferably, the conductive rod is a metal rod, and even more preferably, the conductive rod is a copper rod. In this embodiment and Embodiment 2, copper rods with excellent conductivity are used.

[0035] The assembly process of this embodiment is as follows: First, the supporting conductive rod 8 is passed through the magnetic core 12 in sequence. Then, ceramic gaskets 7 are respectively installed at both ends of the supporting conductive rod 8 with their T-shaped ends facing outwards. After assembly, the entire supporting conductive rod 8 is placed in the corresponding first groove 9 and second groove 10, and it is ensured that the T-shaped ends of the ceramic gaskets 7 placed in the grooves extend out of the grooves. During assembly, it is necessary to ensure that the supporting conductive rod 8 is horizontally mounted between the first fixing plate 1 and the second fixing plate 2 arranged in front and behind, so as to avoid the thermal stress generated during the heating process causing serious deformation of the supporting conductive rod 8, and to ensure the structural stability and current conduction consistency of the supporting conductive rod 8.

[0036] Next, attach nuts to one end of each of the two supporting conductive rods 8, along with the first interface of one end of a first copper busbar 4 and another nut. Tighten the two nuts to secure the two supporting conductive rods 8, the corresponding end of the first copper busbar 4, the ceramic gasket 7, and the first fixing plate 1. The other ends of the two supporting conductive rods 8 are connected to the two interfaces of the same second copper busbar 11, with the remaining steps being the same as the assembly method for one end. Then, attach the second interfaces of the two first copper busbars 4 to the input conductive rod 5 or the output conductive rod 6, and tighten the nuts to secure them. Through the above assembly operations, a closed current loop is finally formed for the entire longitudinal magnetic furnace frame, ensuring stable current conduction.

[0037] Finally, ceramic screws are inserted into the pre-set screw fixing holes 13 on the base 3 and tightened to reliably fix the entire longitudinal magnetic furnace frame, ensuring the structural stability of the frame during operation. It should be noted that the ceramic screw tightening process on the base 3 does not require frequent operation; it only needs to be tightened again when loosening is detected. This simplifies subsequent maintenance and ensures the continued stability of the furnace frame.

[0038] Example 2

[0039] like Figures 5-8 As shown, the four supporting conductive rods 8 are connected in parallel: the four supporting conductive rods 8 are divided into two groups, and each group of supporting conductive rods 8 is connected in series according to the connection method of Embodiment 1. The difference from Embodiment 1 is that, referring to... Figure 5 In both groups, the first copper busbars 4, which are simultaneously connected to either the input conductive rod 5 or the output conductive rod 6, are spaced apart by a nut. Taking the input conductive rod 5 and the supporting copper rods as examples, the nuts are sequentially tightened onto the input conductive rods: the nut, the first interface of one first copper busbar 4, the other nut, the first interface of the other first copper busbar 4, and the third nut. This arrangement forms a parallel circuit structure with strong current-carrying capacity. Adding two more supporting conductive rods can achieve parallel connection in the same manner.

[0040] Supporting conductive rods (number ≥ 3) must be an odd number and can only be connected in series; even numbers can be connected in parallel or in series.

[0041] The assembly process and requirements of this embodiment are the same as those of Embodiment 1. Two sets of supporting conductive rods are installed one after the other. It should be noted that only one nut is needed between the two first copper busbars of the input conductive rod or between the two first copper busbars of the output conductive rod.

[0042] The longitudinal magnetic heat treatment method based on the slotted quick-connect longitudinal magnetic furnace frame involves fitting the supporting conductive rod 8 onto the magnetic core 12 for longitudinal magnetic heat treatment as needed, and then reinstalling it onto the longitudinal magnetic furnace frame. The longitudinal magnetic furnace frame is then connected in series or parallel as needed. Subsequently, the longitudinal magnetic furnace frame is transferred and fixed inside the longitudinal magnetic furnace. The power supply lines on the longitudinal magnetic furnace are connected to the corresponding input conductive rod 5 and output conductive rod 6. After closing the furnace door, the process parameters are set as follows: temperature 280-460℃, current 70-200A. The longitudinal magnetic furnace adaptively heats up and then cools down, while simultaneously applying longitudinal magnetization. When the furnace temperature drops to the exit temperature of 200-210℃, the slotted quick-connect longitudinal magnetic furnace frame is removed from the longitudinal magnetic furnace.

[0043] The magnetic cores were placed on a conventional perforated longitudinal magnetic furnace frame and heat-treated according to the conventional longitudinal magnetic method and the slotted quick-connect longitudinal magnetic furnace frame in the two embodiments, respectively. The magnetization test parameters are shown in Tables 1, 2 and 3.

[0044]

[0045] In comparison, the differences in the key performance parameter remanence ratio (Br / Bs) are quite large. The standard acceptable range for the corresponding products is above 0.9. The pass rate of traditional furnace frames is only 50%, while the pass rate of slotted furnace frames is 100%.

[0046] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and various changes or modifications can be made to these embodiments without departing from the principles and essence of the present invention. The scope of protection of the present invention is defined only by the appended claims.

Claims

1. A slotted, quick-assembly longitudinal magnetic furnace frame, characterized in that: The system includes a first fixing plate (1), a second fixing plate (2), a supporting conductive rod (8), an input conductive rod (5), and an output conductive rod (6). The first fixing plate (1) has several first slots (9), and the second fixing plate (2) has several second slots (10) that correspond one-to-one with the several first slots (9). The supporting conductive rod (8) is used to place the magnetic core (12). Each supporting conductive rod (8) passes through a corresponding first slot (9) and a second slot (10). The input conductive rod (5) and the output conductive rod (6) are mounted on the first fixing plate (1). One end of each supporting conductive rod (8) is connected in series or in parallel to the input conductive rod (5) or the output conductive rod (6) through a first copper busbar (4), and the other end of each supporting conductive rod (8) is connected in series or in parallel through a second copper busbar (11).

2. The slotted, quick-assembly longitudinal magnetic furnace frame according to claim 1, characterized in that: The supporting conductive rod (8) is sleeved in the ceramic gasket (7) corresponding to the first groove (9) or the second groove (10).

3. The slotted, quick-assembly longitudinal magnetic furnace frame according to claim 1, characterized in that: The first slot (9) and the second slot (10) are both arranged in a centrally symmetrical manner.

4. The slotted, rapid-assembly longitudinal magnetic furnace frame according to claim 2, characterized in that: The first groove (9) and the second groove (10) have a groove diameter of 14-18 mm, the inner diameter of the ceramic gasket (7) is 14-18 mm, and the outer diameter of the supporting conductive rod (8) is 8-12 mm.

5. The slotted, rapid-assembly longitudinal magnetic furnace frame according to claim 2, characterized in that: The ceramic gasket (7) is a hollow cylindrical structure with a "T" shaped longitudinal section.

6. The slotted, quick-assembly longitudinal magnetic furnace frame according to claim 1, characterized in that: The length of the supporting conductive rod (8) is 1000-1200mm.

7. The slotted, quick-assembly longitudinal magnetic furnace frame according to claim 1, characterized in that: There are multiple first copper busbars (4) and second copper busbars (11), and they have the same structure, each including a first interface and a second interface.

8. A slotted, quick-assembly longitudinal magnetic furnace frame according to claim 1, characterized in that: The bottom of the first fixing plate (1) and the second fixing plate (2) are both fixedly connected to a base (3), and the base (3) has a fixing hole (13).

9. A longitudinal magnetic heat treatment method based on a slotted, rapidly overlapping longitudinal magnetic furnace frame, characterized in that: After the supporting conductive rod (8) is fitted onto the magnetic core (12) for longitudinal magnetic heat treatment as needed, it is put back into the longitudinal magnetic furnace frame. Then, the longitudinal magnetic furnace frame is connected in series or in parallel as needed. Subsequently, the longitudinal magnetic furnace frame is transferred and fixed inside the longitudinal magnetic furnace. The power supply line on the longitudinal magnetic furnace is connected to the corresponding input conductive rod (5) and output conductive rod (6) respectively. After closing the furnace door, the process parameters are set as follows: temperature 280-460℃, current 70-200A, the longitudinal magnetic furnace adaptively heats up and then cools down. At the same time as cooling down, longitudinal magnetization is applied. When the furnace temperature drops to the furnace outlet temperature of 200-210℃, the slotted quick-connect longitudinal magnetic furnace frame is moved out of the longitudinal magnetic furnace.

10. A longitudinal magnetic heat treatment method based on a slotted, rapidly overlapping longitudinal magnetic furnace frame according to claim 9, characterized in that: The step of reinstalling the support conductive rod (8) back into the longitudinal magnetic furnace frame also includes fitting the support conductive rod (8) into the ceramic gasket (7) in the corresponding first groove (9) or second groove (10).

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