Production method of amorphous three-dimensional wound core

Abstract

The invention belongs to the technical field of production and manufacturing of amorphous alloy three-dimensional roll transformer iron cores of 800kVA and above, and provides a production method of an amorphous three-dimensional roll iron core, which comprises the following steps: placing the roll iron core on an annealing frame and feeding the roll iron core into a heat treatment furnace; compressed air is introduced into the heat treatment furnace within the first preset time, and the flow range of the compressed air is controlled between 35 liters per minute and 40 liters per minute; starting a field power supply, and setting the field current to be 1580A to 1620A; heating the heat treatment furnace according to a set program, wherein the set program comprises a heating stage, a temperature difference pulling stage, a re-heating stage, a heat preservation stage and a cooling stage; and cooling the wound iron core and discharging the cooled wound iron core. By combining and setting reasonable annealing temperature, heating rate, cooling rate, heat preservation time and direct current magnetic field size, discreteness of performance of the wound core is guaranteed, excitation power of the wound core is reduced, and performance of the formed amorphous alloy wound core is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of production and manufacturing of 800kVA and above amorphous alloy three-dimensional wound transformer cores, and specifically relates to a production method of amorphous three-dimensional wound cores. Background Art

[0002] Amorphous alloy strips are prone to stress during rapid quenching, coiling, transportation, cutting and forming, and the core needs to be annealed. Magnetic field annealing is a material processing technology, the purpose of which is to change the shape of the material's hysteresis loop BH through induced uniaxial anisotropy to meet certain special performance requirements for the material.

[0003] In the relevant existing technologies, the wound core of 800kVA and above amorphous alloy three-dimensional wound transformers becomes a large-capacity amorphous three-dimensional wound core. Due to its large size and weight, it puts forward very high requirements on the production of the wound core. The maximum limit size and weight of the equipment increase the difficulty of core production. If the size of the corresponding equipment is simply increased for this large-capacity amorphous three-dimensional wound core, the performance requirements of the wound core cannot be met. Summary of the invention

[0004] In view of this, the present invention provides a method for producing an amorphous three-dimensional wound core to solve the problem in the prior art that only the size of the corresponding equipment is increased and the performance requirements of a large-capacity amorphous three-dimensional wound core cannot be met.

[0005] The present invention provides a method for producing an amorphous three-dimensional wound core, comprising: placing the wound core on an annealing rack and sending it into a heat treatment furnace; introducing compressed air into the heat treatment furnace within a first preset time, wherein the flow range of the compressed air is controlled to be between 35 liters / minute and 40 liters / minute; starting a field power supply, and setting a field current to 1580A to 1620A; heating the heat treatment furnace according to a set program, wherein the set program comprises: a heating stage, a temperature difference pulling stage, a heating stage again, a heat preservation stage, and a cooling stage; and taking the wound core out of the furnace after the cooling is completed.

[0006] In some embodiments, during the temperature rising stage, if the temperature of the wound core reaches a first set temperature, the temperature difference drawing stage is entered.

[0007] In some embodiments, during the temperature difference pulling stage, if the furnace temperature is reduced to the second set temperature within 280 minutes, the temperature raising stage is entered.

[0008] In some embodiments, in the reheating stage, when the furnace temperature rises to the third set temperature and when it is detected that the temperature of the wound core reaches 335° C., the heat preservation stage is entered.

[0009] In some embodiments, during the insulation stage, the furnace temperature is maintained at a fourth set temperature for a duration of 240 minutes, and then the insulation is terminated.

[0010] In some embodiments, during the temperature reduction stage, when the temperature of the wound core is reduced to below 250° C., the core is removed from the furnace.

[0011] In some embodiments, the first preset time is 13 minutes to 17 minutes.

[0012] In some embodiments, the method for producing the amorphous three-dimensional wound core further comprises: using a forming device to perform a forming operation on the wound core that has completed the annealing treatment to obtain a formed wound core.

[0013] In some embodiments, the method for producing the amorphous three-dimensional wound core further comprises: assembling the molded wound cores using an assembling device so that the three wound cores form an angle of 60 degrees with each other.

[0014] In some embodiments, before placing the rolled core on an annealing rack and sending it into a heat treatment furnace, the process also includes: inserting two thermocouples into the middle of the upper and lower iron yokes of the rolled core and the middle of the core column, respectively, wherein the temperature measuring points of the thermocouples are located in the middle of the strip width of the rolled core.

[0015] The beneficial effects of the present invention are:

[0016] The present invention combines and sets reasonable annealing temperature, heating rate, cooling rate, holding time and DC magnetic field size, thereby ensuring the discreteness of the performance of the wound core, reducing the excitation power of the wound core and improving the performance of the formed amorphous alloy wound core. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the following briefly introduces the drawings required for the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A flow chart of a method for producing an amorphous three-dimensional wound core according to an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the three-dimensional structure of an annealing frame of a forming device of a method for producing an amorphous three-dimensional wound core according to an embodiment of the present invention;

[0020] Figure 3 It is a schematic diagram of the top view of the structure of a forming device of a method for producing an amorphous three-dimensional wound core according to an embodiment of the present invention;

[0021] Figure 4 It is a schematic cross-sectional structural diagram of a forming device of a method for producing an amorphous three-dimensional wound core according to an embodiment of the present invention;

[0022] Figure 5 The present invention is a schematic structural diagram of an assembling device for a method for producing an amorphous three-dimensional wound core according to an embodiment of the present invention.

[0023] Explanation of the reference numerals: 110, forming table; 111, first bottom plate; 112, first guide rail; 113, second guide rail; 114, slider; 115, third guide rail; 120, forming tool; 121, supporting bottom frame; 1211, second bottom plate; 1212, top plate; 1213, rib plate; 122, supporting side frame; 1221, fixing plate; 1222, cushion block; 1223, vertical plate; 210, mounting frame; 220, upper arm; 230, adjusting mechanism; 240, lower arm; 300, coiled core; 400, annealing frame; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] Combine the following Figures 1 to 5 , describing an embodiment of the present invention.

[0029] like Figure 1 As shown, according to an embodiment of the invention, a method for producing an amorphous three-dimensional wound core is provided, and the method for producing an amorphous three-dimensional wound core comprises the following steps:

[0030] Step S101: placing the coiled core on an annealing rack and sending it into a heat treatment furnace.

[0031] Step S102: Compressed air is introduced into the heat treatment furnace within a first preset time, and the flow rate of the compressed air is controlled in a range of 35 liters / minute to 40 liters / minute.

[0032] Step S103: start the field power supply and set the field current to 1580A to 1620A;

[0033] Step S104: heating the heat treatment furnace according to a set procedure, wherein the set procedure includes: a heating stage, a temperature difference stage, a heating stage again, a heat preservation stage, and a cooling stage;

[0034] Step S105: The rolled core is taken out of the furnace after the temperature is reduced.

[0035] For the amorphous three-dimensional wound core 300 with a larger capacity of 800kVA and above, the cross-sectional area of ​​the core column of the amorphous alloy closed three-dimensional wound core 300 is twice that of the iron yoke. The upper and lower parts of the wound core are located in different positions in the annealing furnace, and the heating and cooling rates of various parts of the wound core are different, which leads to differences in the performance of the core after annealing. Therefore, it is necessary to conduct research on the heating and cooling process of the wound core, temperature control technology, temperature values ​​at each stage of the heat treatment process of the wound core, and the influence of the insulation time on the core performance, so as to improve and stabilize the performance of the wound core.

[0036] In this embodiment, the annealing treatment of the wound core 300 is completed by a heat treatment furnace. The purpose of annealing is to restore the electromagnetic properties of the core sheet after processing. The annealing temperature, heating and cooling speed should ensure that the amorphous alloy strip does not deform, such as becoming wavy or curved. After annealing, the surface of the wound core should be clean without traces of oxidation.

[0037] The coiled core 300 is placed on an annealing rack 400. The structure of the annealing rack 400 is as follows: Figure 2 As shown, the annealing rack 400 is placed on a trolley, and the iron core is transported to the heat treatment furnace by clicking the trolley switch.

[0038] Then connect the conductive copper rod to the power supply of the heat treatment furnace. The overlapping surface of the copper bar is required to be in good contact and the bolts are reliably tightened. After the copper bar is connected, use a multimeter to detect the copper rods and the iron core. No conduction is allowed.

[0039] After confirming that everything is normal, pull down the furnace door lock rod, press the switch, lower the furnace door, when the furnace door touches the contactor, release the lock rod, rotate the pneumatic valve switch, and close the furnace door.

[0040] Turn on the field power supply, select manual mode, turn the magnetic field current knob right, and set the field current to a value between 1580A and 1620A. For example, if the field current is set to 1600A and the field voltage is displayed below 1V, it means that the copper busbar is connected normally.

[0041] Start the heat treatment furnace and check whether the temperature displayed on the temperature controller is normal. If the temperature display is abnormal, check the thermocouple wire connection or plug-in status in time. If the thermocouple wire is damaged, replace it in time.

[0042] Open the compressed air valve to pass compressed air, and control the compressed air flow rate within the range of 35L / min to 40L / min. Fill the heat treatment furnace with dry compressed air for 15 minutes before heating. Heat treat the rolled core according to the preset procedure, and dry compressed air is uninterrupted during the heat treatment process.

[0043] The variables that affect the annealing effect of amorphous alloy cores include the annealing temperature, heating rate, cooling rate, holding time, DC magnetic field size, etc. of the annealing furnace. If the annealing temperature is too high, the amorphous core tends to crystallize, and the generation of fragments will increase, and it will no longer have the advantage of low no-load loss of the amorphous core. However, if the annealing temperature is too low, the best heat treatment effect cannot be achieved, and it also does not have low no-load loss; the speed of the heating rate will affect the temperature discreteness of the amorphous alloy cores of the same batch, and will also affect the discreteness of the core performance. The faster the heating rate, the greater the discreteness; after the amorphous core is heated to the appropriate annealing temperature, it is necessary to keep it warm for a period of time to achieve relaxation of the amorphous core structure, which is beneficial to reduce the excitation power of the core; after the amorphous alloy core is formed, a DC magnetic field needs to be added during annealing to obtain a good magnetic domain orientation, so as to improve its magnetic properties.

[0044] In another embodiment, during the temperature rising stage, if the temperature of the wound core reaches a first set temperature, the temperature difference drawing stage is entered.

[0045] Optionally, in the temperature difference pulling stage, if the furnace temperature is reduced to the second set temperature within 280 minutes, the temperature rising stage is entered. By controlling the cooling time, it can be ensured that the cooling rate of the wound core can meet the performance requirements of the wound core.

[0046] Furthermore, in the second heating stage, when the furnace temperature rises to the third set temperature and when it is detected that the temperature of the wound core reaches 335° C., the heat preservation stage is entered.

[0047] Furthermore, during the heat preservation stage, the furnace temperature is maintained at the fourth set temperature for a duration of 240 minutes, and then the heat preservation is terminated.

[0048] During the heat preservation stage, if the temperature of the rolled core is higher than the set temperature, the furnace temperature can be appropriately lowered; when the temperature of the rolled core is lower than the set temperature, the furnace temperature can be appropriately raised to ensure that the temperature of the rolled core is within the set range. During the heat preservation stage, if the temperature of the rolled core is higher than the maximum set temperature and lowering the furnace temperature is ineffective, the heat preservation can be terminated in advance according to the situation and the cooling program can be entered.

[0049] During the insulation stage, if the temperature of the coiled core is lower than the minimum set temperature and raising the furnace temperature is ineffective, the insulation time can be extended according to the situation.

[0050] 15 minutes before the end of the insulation, the water circulation can be turned on to enter the cooling program. The cooling fan valve opens automatically and the hot air is sucked into the water cooling bag. When the maximum temperature of the coiled core drops to about 250℃, the cooling is completed and the cooling valve and circulating fan are automatically closed.

[0051] In the cooling stage, when the temperature of the rolled core drops below 250℃, the core is taken out of the furnace. During the cooling process, the cooling program is turned on and the cooling water circulation is started. When the temperature of each rolled core drops below 250℃, the furnace door is opened, the compressed air is turned off, the magnetic field power is turned off, and the core is taken out of the furnace.

[0052] When the coiled core is out of the furnace, open the furnace door valve, pull down the furnace door locker rod, press the button, and raise the furnace door to the highest position. Then remove the copper bar connection bolts in the furnace and unplug the thermocouple wire. Then move the trolley out of the heat treatment furnace and remove the core copper bar connection bolts. Lift the core together with the annealing rack to the forming position again, and put it aside after re-supporting it once.

[0053] The first preset time is 13 minutes to 17 minutes, preferably 15 minutes.

[0054] Furthermore, the method for producing the amorphous three-dimensional wound core also includes: using a forming device to perform a forming operation on the wound core that has completed the annealing treatment to obtain a formed wound core.

[0055] Among them, the forming device is a concave adjustable mold. Using the angled forming device to stamp each level of bandwidth can ensure that the lower side of the core semi-finished product is in the same plane, fill the inclined surface of the concave adjustable mold, make the end faces of each level of bandwidth smooth, and control the stacking thickness tolerance within ±1mm.

[0056] like Figure 3 and Figure 4As shown, the forming device includes a forming table 110, a forming tool 120 and a linear drive mechanism. The forming tool 120 is slidably connected to the forming table 110 in a first direction X and a second direction Y. The first direction X and the second direction Y are cross-arranged. The forming tool 120 is provided with an annular groove, and an escape space is formed in the annular groove. The annular groove is suitable for placing a coiled core and the inner frame of the coiled core abuts against the inner side wall of the groove; the linear drive mechanism is provided in the escape space, and the linear mechanism is suitable for driving the forming tool 120 to slide in the first direction X or the second direction Y.

[0057] The forming table 110 includes: a first base plate 111, having a mounting surface; a first guide rail 112, which is arranged on the mounting surface and extends in a first direction X, and includes a first track and a second track, and the first track and the second track are arranged at intervals from each other in the first direction X; a second guide rail 113, which is arranged on the mounting surface and extends in a second direction Y, and includes a third track and a fourth track, and the third track and the fourth track are arranged at intervals from each other in the second direction Y; at least four sliders 114, which are arranged on the first track, the second track, the third track and the fourth track; wherein an avoidance space is formed between the first track and the second track, and between the third track and the fourth track.

[0058] If the linear drive mechanism pushes the wound core outward in the first direction X, the wound core expands outward in the first direction X, and at the same time, the wound core contracts inward in the second direction Y, so that the wound core becomes square, completing the forming operation of the wound core.

[0059] In order to realize the multi-directional movement function of the forming table 110, at least four sliders 114 are provided. These sliders 114 are respectively arranged on the first track, the second track, the third track and the fourth track, and can slide smoothly along their respective tracks. The sliders 114 are designed so that they can be accurately positioned and moved in the first direction and the second direction.

[0060] Two first guide rails 112 are arranged in the second direction Y at intervals from each other; and / or two second guide rails 113 are arranged in the first direction X at intervals from each other.

[0061] The forming table 110 further includes a third guide rail 115 . The third guide rail 115 is disposed in the avoidance space. The third guide rail 115 extends in the first direction or the second direction. The linear drive mechanism is slidably connected to the third guide rail 115 .

[0062] Furthermore, the annular groove is provided with an inclined bottom wall, and the inclined bottom wall is inclined from outside to inside and from top to bottom.

[0063] The forming tool 120 includes: a supporting base frame 121, which is slidably connected to the forming table 110 in the first direction and the second direction; a supporting side frame 122, which forms an annular groove with the supporting base frame 121; wherein the linear drive mechanism is drivingly connected to the supporting side frame 122.

[0064] The supporting side frames 122 are arranged in four groups, two of which are arranged in an interval manner along the first direction, and the remaining two groups of supporting side frames 122 are arranged in an interval manner along the second direction.

[0065] The supporting frame 121 includes: a second bottom plate 1211 slidably connected to the forming table 110 ; a top plate 1212 forming a bottom wall of the annular groove, the top plate 1212 being inclined from outside to inside and from top to bottom; and a rib plate 1213 connecting the top plate 1212 and the second bottom plate 1211 .

[0066] The supporting side frame 122 includes: a fixed plate 1221, one end of which is connected to the second bottom plate 1211, and the fixed plate 1221 is suitable for abutting against the driving end of the linear drive mechanism; a cushion block 1222, which is arranged on the second bottom plate; a vertical plate 1223, which is arranged on the cushion block 1222, and the vertical plate 1223 and the top plate 1212 form an annular groove, and the vertical plate 1223 abuts against the inner frame of the winding core.

[0067] According to the production method of the amorphous three-dimensional wound core provided by the present invention, after the winding of the amorphous three-dimensional wound core is completed, the circular core frame is transferred to the vicinity of the forming table 110, and the forming table 110 is erected to prepare for material connection. During the material connection process, the back of the core fits against the top plate of the forming tool 120, and the forming tool 120 is adjusted so that the four vertical plates support the inner frame of the core, thereby fixing the core on the forming tool 120. The forming table 110 is slowly leveled and moved to the bottom of the forming cylinder, and the cylinder equipped with the forming mold descends into the inner frame. The cylinder is opened to form the circular core frame into a square core frame with the window width and window height meeting the requirements.

[0068] The linear drive mechanism is one of a bidirectional oil cylinder, a bidirectional air cylinder or a bidirectional motor.

[0069] The production method of the amorphous three-dimensional wound core also includes: assembling the formed wound cores using an assembling device so that the three wound cores form an angle of 60 degrees with each other.

[0070] Before assembling the wound core, apply a thin epoxy layer with a thickness of less than 1mm on the surface of the wound core. The surface of the epoxy layer should be smooth and flat, without paint tumors, scratches and burns, and the color should be uniform. Then use the assembly device to assemble the single-frame core to ensure that the three single-frame cores are perpendicular to the bottom plate, ensure that the three cores are at a 60° angle to each other, and that each adjacent core is closely arranged with each diameter end face aligned flatly. Insert insulating cardboard between each adjacent core. After the core is erected and assembled to ensure the equilateral triangle is symmetrical, evenly wrap a layer of insulating tape on the circular core column part, and use a drying lamp to cure the insulating tape to complete the core assembly.

[0071] Specifically, Figure 5 As shown, the amorphous three-dimensional wound core assembly device includes: an assembly stand, the assembly stand includes: a mounting frame 210; an upper cantilever arm 220, which is arranged on the mounting frame 210; an adjustment mechanism 230, which is arranged on the mounting frame 210; a lower cantilever arm 240, which is arranged below the upper cantilever arm 220, and the lower cantilever arm 240 is connected to the adjustment mechanism 230, the adjustment mechanism 230 is suitable for adjusting the lower cantilever arm 240 to be close to or away from the upper cantilever arm 220, and the upper cantilever arm 220 and the lower cantilever arm 240 are suitable for hanging the wound core.

[0072] The adjustment mechanism 230 is disposed on the mounting frame 210, and is used to control the position of the lower cantilever arm 240 relative to the upper cantilever arm 220. The adjustment mechanism 230 can realize a fine adjustment function, so that the lower cantilever arm 240 can be close to or away from the upper cantilever arm 220 as needed. Through the control of the adjustment mechanism 230, the lower cantilever arm 240 can be flexibly moved to adapt to different assembly requirements. The main function of the lower cantilever arm 240 is to work in conjunction with the upper cantilever arm 220 to jointly hang the wound core to ensure its stability and accuracy during the assembly process. This adjustment function is crucial to ensure the precise alignment of the wound core during the assembly process, and can adapt to wound cores of different heights and weights.

[0073] The lower arm includes a long plate and a connecting component arranged at one end of the long plate. The connecting component includes a plurality of plates and forms a frame. The frame is used to be connected to the slider, and the long plate is used to directly hang the coil core.

[0074] The lower arm 240 is connected to the adjustment mechanism 230, so that the adjustment mechanism 230 can effectively adjust the position of the lower arm 240. The adjustment mechanism 230 is suitable for adjusting the lower arm 240 to be close to or away from the upper arm 220, thereby achieving precise control and adjustment of the assembly stand, ensuring its stability and reliability during use. Through this design, the flexibility and functionality of the assembly stand are significantly improved, so that it can perform well in various application scenarios.

[0075] The mounting frame 210 has an avoidance space, and the adjustment mechanism 230 includes: a screw connected to the mounting frame 210; a crank handle arranged at the upper end of the screw; a connecting nut sleeved on the screw and threadedly connected to the screw 131; wherein, the lower cantilever arm 240 is connected to the connecting nut, and the lower cantilever arm 240 passes through the avoidance space and extends to the bottom of the upper cantilever arm 220.

[0076] The adjustment mechanism 230 further includes: a slide rail assembly, which is arranged in the avoidance space and on the mounting frame 210 on the corresponding side; a slider assembly, which is arranged on the lower arm 240, and the slider assembly is slidably connected to the slide rail assembly 133.

[0077] The mounting frame 210 includes: two support rods spaced apart from each other, with a space between the two support rods; a connecting plate detachably connected to the support rods; wherein the lifting arm 220 is disposed on the connecting plate

[0078] The connecting plate is provided with a plurality of threaded holes to adjust the installation height of the lifting arm 220 .

[0079] The assembly stand also includes: a first base plate, which is provided with a rotation center; a second base plate, which is rotationally connected to the first base plate around the rotation center; a mounting seat, which is provided on the second base plate, and the upper arm 220 and the lower arm 240 are both provided on the mounting seat.

[0080] The assembly stand also includes a limiting mechanism, which is arranged on the first bottom plate and the second bottom plate to limit the rotation angle of the second bottom plate.

[0081] The main function of the limiting mechanism is to limit and control the rotation angle of the second base plate. The assembly angle can be fine-tuned. The limiting mechanism includes: four limiting rods on the first base plate; a rotating member arranged on the limiting rod; four first arc grooves on the second base plate, corresponding to the four limiting rods; two second arc grooves on the mounting seat, two second arc grooves corresponding to two of the first arc grooves; the rotating member is arranged in the first arc groove and the second arc groove and can slide in the first arc groove and the second arc groove.

[0082] In this embodiment, the limiting mechanism includes a limiting rod, a first arc groove and a second arc groove. The limiting rod is an important component of the limiting mechanism, and the number of the limiting rods is set to four, and the four limiting rods are evenly distributed on the first base plate around the rotation center. The limiting rod can be a stud. The limiting rod extends into the corresponding first arc groove and the second arc groove, so as to limit the movement range of the second base plate and the mounting seat, ensuring that they move within a predetermined trajectory. The rotating member can be a tapered stick bearing, which is arranged on the limiting rod, and can improve the flexibility and stability of the entire assembled step during the rotation process.

[0083] The mounting seat is welded to the second base plate and has a group of arc-shaped openings, namely the second arc-shaped grooves, which are arranged corresponding to the first arc-shaped grooves. When in use, the middle openings of the first base plate and the second base plate are connected through bearings, and the studs of the first base plate pass through the arc-shaped holes of the second base plate and then tapered roller bearings are respectively installed. When the second base plate and the cantilever structure installed on it are rotated, the middle bearing rotates, and the tapered roller bearings at the four corners can slide in the corresponding arc-shaped grooves, so that the assembled stand can rotate within a certain range.

[0084] In summary, the limiting mechanism includes four limiting rods, four rotating members, four first arc grooves and two second arc grooves. These components work together to enable the rotating members to slide in the first arc grooves and the second arc grooves, thereby realizing the function of the limiting mechanism. Through this design, the limiting mechanism can effectively limit the range of motion of the assembly stand, ensuring that it moves within a predetermined trajectory, thereby improving the stability and reliability of the entire system.

[0085] The amorphous three-dimensional wound core assembly device also includes: a triangular guide rail, which is provided with a track center and three track sections arranged at an angle of 220° around the track center; an assembly frame, which is slidably connected to the corresponding track section, and the assembly frame includes an upper cantilever arm 220 and a lower cantilever arm 240, and the upper cantilever arm 220 and the lower cantilever arm 240 are suitable for hanging the wound core; a driving mechanism, which is connected to the assembly frame, and the driving mechanism is suitable for driving the assembly frame to slide on the corresponding track section, so as to realize that the three assembly frames respectively run toward the track center to complete the assembly of the wound core.

[0086] In this embodiment, the amorphous three-dimensional rolled core assembly device includes a triangular guide rail, an assembly stand and a driving mechanism, aiming to improve assembly efficiency and accuracy. Around the center of the track, three track segments are arranged in a ring in sequence, and the angle between two adjacent track segments is 220°. An assembly stand is slidably connected to each track segment. Such a design ensures that the rolled cores respectively hung on the three assembly stands are assembled at an angle of 220° to each other when the three assembly stands are running toward the center of the track on their respective corresponding track segments, and each adjacent two cores are closely arranged, and each diameter end face is flatly aligned. Insulating cardboard is inserted between each adjacent two cores. After the cores are erected and assembled to ensure the equilateral triangle symmetry, a layer of insulating tape is evenly wrapped around the circular core column part, and the insulating tape is cured with a drying lamp to complete the assembly of the rolled core.

[0087] After the amorphous three-dimensional wound core is formed, the core is changed from a lying position to a standing position and then transported to the assembly device.

[0088] Place the upper iron yoke of the iron core stably on the upper lifting arm 220 of the assembly platform, and then adjust the height of the lower lifting arm 240 so that the lower lifting arm 240 is close to the lower iron yoke of the iron core to fix the iron core.

[0089] The assembly device is provided with three assembly racks, which are mutually angled at 220°. The three core frames are placed on the three assembly racks respectively, and the angles of the assembly racks are fine-tuned to slowly bring the three cores closer.

[0090] After adjusting to the appropriate angle, place copper sheets between the three frames and put them together. Use a molding sleeve to secure them firmly, and the assembly of the wound core is completed.

[0091] Furthermore, the rolled core is placed on an annealing rack and sent into a heat treatment furnace, and before that, two thermocouples are inserted into the middle of the upper and lower iron yokes of the rolled core and the middle of the core column, and the temperature measurement points of the thermocouples are located in the middle of the strip width of the rolled core. Two thermocouples are inserted into the middle of the upper and lower iron yokes of the core and the middle of the core column, and the temperature measurement points of the thermocouples need to be basically located in the middle of the strip width of the core.

[0092] Check the lead wires of each thermocouple. If there is any damage, wrap them with imide film tape for protection. Arrange the lead wires of the thermocouple neatly and keep them side by side at the furnace door without crossing or overlapping.

[0093] In this application, the amorphous alloy rolled core is composed of multiple levels of amorphous strips of different sizes. High-precision longitudinal and oblique shearing equipment is required to cut the rectangular amorphous alloy strips at different angles. The burr height needs to be strictly controlled during shearing to prevent the burrs from being too large and affecting the core winding quality and core performance.

[0094] The strips cut at multiple angles enter the winding process. When winding the core, it is necessary to control the tape feeding speed and winding tension to ensure that the core can be wound tightly to prevent deformation due to its own weight and affect the quality of the core.

[0095] The single-frame wound core is wound and then sent to a heat treatment process for annealing.

[0096] Before annealing, the conductive copper busbar needs to be processed. The angle grinder polishing wheel can be used to polish and grind all the connection contact surfaces of the conductive busbar and the conductive rod to completely remove the oxide layer on the connection contact surface.

[0097] When polishing the contact surface of the conductive bar and conductive rod, the contact surface must be kept flat and smooth without pits or mechanical damage.

[0098] When loading the rolled core into the furnace, a special hoist is used to stably hang the rolled core on the core placement rack. Large-capacity cores are annealed in a horizontal single frame, with one core frame processed in each furnace. After the core is loaded into the furnace, the furnace number and furnace position are recorded on the process card. Then the conductive rod is connected. According to the schematic diagram, the connecting copper bar can be passed through the core window in sequence. The copper bar has no contact with the core, and the copper bar is isolated from the annealing rack with refractory insulating materials. The copper bar overlap should be in full contact, and the connecting bolts should be tightened reliably to avoid excessive contact resistance between the copper bars and cause failures.

[0099] Obviously, the above embodiments are merely examples for clear description and are not limitations of the implementation methods.

[0100] For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived from this are still within the protection scope of the invention.

Claims

1. A method for producing an amorphous three-dimensional wound core, characterized in that: include: The rolled core is placed on an annealing rack and sent into a heat treatment furnace; Introducing compressed air into the heat treatment furnace within a first preset time, wherein the flow rate of the compressed air is controlled within a range of 35 liters / minute to 40 liters / minute; Turn on the field power supply and set the field current to 1580A to 1620A; Heating the heat treatment furnace according to a set procedure, wherein the set procedure includes: a heating stage, a temperature difference stage, a re-heating stage, a heat preservation stage, and a cooling stage; The rolled core is taken out of the furnace after the temperature is reduced.

2. The method for producing an amorphous three-dimensional wound core according to claim 1, characterized in that: In the temperature rising stage, if the temperature of the wound core reaches a first set temperature, the temperature difference drawing stage is entered.

3. The method for producing an amorphous three-dimensional wound core according to claim 1, characterized in that: In the temperature difference pulling stage, if the furnace temperature is reduced to the second set temperature within 280 minutes, the temperature rising stage will begin.

4. The method for producing an amorphous three-dimensional wound core according to claim 1, characterized in that: In the reheating stage, when the furnace temperature rises to the third set temperature and when it is detected that the temperature of the wound core reaches 335° C., the heat preservation stage is entered.

5. The method for producing an amorphous three-dimensional wound core according to claim 1, characterized in that: In the heat preservation stage, the furnace temperature is maintained at the fourth set temperature for a duration of 240 minutes, and then the heat preservation is terminated.

6. The method for producing an amorphous three-dimensional wound core according to claim 1, characterized in that: In the cooling stage, when the temperature of the wound core drops to below 250° C., the core is taken out of the furnace.

7. The method for producing an amorphous three-dimensional wound core according to any one of claims 1 to 6, characterized in that: The first preset time is 13 minutes to 17 minutes.

8. The method for producing an amorphous three-dimensional wound core according to any one of claims 1 to 6, characterized in that: Also includes: A forming device is used to form the rolled core after annealing to obtain a formed rolled core.

9. The method for producing an amorphous three-dimensional wound core according to any one of claims 1 to 6, characterized in that: Also includes: The shaped coiled cores are assembled by using an assembling device so that the three coiled cores form an angle of 60 degrees with each other.

10. The method for producing an amorphous three-dimensional wound core according to any one of claims 1 to 6, characterized in that: The rolled core is placed on an annealing rack and sent into a heat treatment furnace, and before that, two thermocouples are inserted into the middle of the upper and lower iron yokes and the middle of the core column, respectively, and the temperature measuring points of the thermocouples are located in the middle of the strip width of the rolled core.

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