Preparation device of soft magnetic core with quasi-circular cross section

Abstract

The utility model provides a preparation device of a soft magnetic core with a quasi-circular cross section, which relates to the technical field of magnetic cores, and comprises a feeding mechanism, the feeding mechanism comprises a rotatable support frame, the rotatable support frame is provided with a central rotating shaft and a plurality of support arms, the central rotating shaft of the rotatable support frame is connected with a rotation driving mechanism, and the rotation driving mechanism is connected with the feeding mechanism. Each supporting arm is provided with a discharging assembly, and the discharging assemblies are used for containing magnetically soft alloy strips of different widths. The winding mechanism is arranged on one side of the discharging mechanism, and a measuring mechanism is arranged on one side of the winding mechanism; and the central control board is electrically connected with the discharging mechanism, the winding mechanism, the measuring mechanism and the rotary driving mechanism. The method has the beneficial effects that the step of replacing a discharging roller in a traditional method is omitted, the production line is simplified, the space is saved, the production efficiency is improved, batch production is facilitated, full-automatic mechanical operation is adopted, the dependence on manpower is small, no waste is produced in the whole production process, and the preparation cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic cores, in particular to a preparation device for a soft magnetic core with a quasi-circular cross section. Background Art

[0002] Amorphous and nanocrystalline soft magnetic alloy strips have excellent soft magnetic properties, such as high saturation magnetic induction, high magnetic permeability, low loss and other characteristics, and are now widely used to prepare magnetic cores for power electronic devices such as inductors, transformers, and mutual inductors. In recent years, as power electronic equipment has rapidly developed towards miniaturization, lightness, and high frequency, this has put forward higher and higher requirements for the miniaturization, lightness, and high frequency of inductors, transformers and other devices.

[0003] When manufacturing amorphous and nanocrystalline magnetic cores, the existing magnetic core preparation devices mostly use a winding machine to wind strips of equal width to obtain magnetic cores with square or rectangular cross-sections. It is well known that under the same cross-sectional area, the perimeter of a rectangle or square is longer than that of a circle. Therefore, in the subsequent preparation of electronic devices such as inductors and transformers, for magnetic cores with the same cross-sectional area, the length of enameled wire required for winding the same number of turns of enameled wire for rectangular or square cross-section magnetic cores is longer than that for circular cross-section magnetic cores, which means that under the same cross-sectional area, the copper content of the rectangular or square cross-section magnetic core winding is higher, resulting in higher resistance, weight and production cost of the device; moreover, the rectangular or square cross-section magnetic core is subjected to greater stress during winding, resulting in serious attenuation of the magnetic core performance, thereby causing the performance attenuation of devices such as inductors and transformers, which in turn increases the volume and weight margin during design, further increasing the weight and cost of the device. Therefore, the gradual replacement of rectangular or square cross-section magnetic cores with circular or quasi-circular cross-section magnetic cores has become a hot topic in the industry.

[0004] At present, the preparation equipment of circular or quasi-circular cross-section magnetic cores is mostly composed of a curve cutting machine and a magnetic core winding equipment. However, the curve cutting machine is expensive, and the curve cutting will also cause a large consumption of strip and high production cost. In addition, the existing winding equipment can only continuously wind strips of the same width, and cannot realize continuous winding of strips of various widths. When winding quasi-circular cross-section magnetic cores, the unwinding roller needs to be replaced many times, which has low production efficiency and is not conducive to mass production. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides a preparation device for a soft magnetic core with a quasi-circular cross section, comprising:

[0006] A material discharge mechanism, wherein the material discharge mechanism comprises a rotatable support frame, wherein the rotatable support frame has a central rotation axis and a plurality of support arms, wherein the central rotation axis of the rotatable support frame is connected to a rotation drive mechanism, and each of the support arms is provided with a material discharge assembly, and each of the material discharge assemblies is respectively used to place soft magnetic alloy strips of different widths;

[0007] A winding mechanism is arranged on one side of the unwinding mechanism, and a measuring mechanism is arranged on one side of the winding mechanism;

[0008] A central control console is electrically connected to the unwinding mechanism, the winding mechanism, the measuring mechanism and the rotating drive mechanism respectively.

[0009] Preferably, the unloading assembly comprises an unloading roller and a pair of elastic pressure rollers matched with the unloading roller;

[0010] The unloading roller and the matching elastic pressure roller can independently rotate in forward and reverse directions to obtain the soft magnetic alloy strip to be unloaded, and the elastic pressure roller maintains the soft magnetic alloy strip in a state to be unloaded.

[0011] Preferably, the rotatable support frame is centrally symmetrical.

[0012] Preferably, the number of the support arms is an even number, and each of the support arms radiates outward radially along the central rotation axis of the rotatable support frame.

[0013] Preferably, the winding mechanism comprises a winding roller, a welding mechanism, a cutter and at least one guide plate, and the guide plate, the cutter and the welding mechanism are arranged in sequence along the material conveying direction.

[0014] Preferably, the winding mechanism further comprises a pair of elastic pressure rollers, which are arranged between the winding roller and the welding mechanism along the feeding direction of the unwinding mechanism.

[0015] Preferably, the welding mechanism is a resistance welding pin, which is electrically connected to the central control console, and the central control console controls the resistance welding pin to weld soft magnetic alloy strips of different widths into one.

[0016] Preferably, the measuring mechanism is a visual dimension measuring device, which measures the winding thickness of the soft magnetic alloy strip in real time and feeds back the winding thickness to the central control console.

[0017] The above technical solution has the following advantages or beneficial effects:

[0018] 1) The utility model designs a feeding mechanism, arranges a plurality of feeding assemblies on a rotatable support frame, and each feeding assembly is used to place soft magnetic alloy strips of different widths. In the process of winding and preparing soft magnetic cores, the feeding assemblies for placing soft magnetic alloy strips of different widths are switched according to the winding program to feed the materials to the winding mechanism. The requirements for winding a magnetic core with a quasi-circular cross-section can be completed on one preparation device, eliminating the step of changing the feeding roller in the traditional method, simplifying the production line, saving space, improving production efficiency, and facilitating mass production.

[0019] 2) It adopts fully automated mechanical operation, has low dependence on manpower, and has no waste output in the entire production process, saving preparation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a device for preparing a soft magnetic core with a quasi-circular cross-section in a preferred embodiment of the utility model.

[0021] In the figure: 1. unloading mechanism; 2. winding mechanism; 3. measuring mechanism; 4. central control console; 11. rotatable support frame; 12. support arm; 13. unloading assembly; 111. central rotating shaft; 131. unloading roller; 132. elastic pressure roller; 21. guide plate; 22. cutter; 23. welding mechanism; 24. winding roller. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The present invention is not limited to the implementation mode, and other implementation modes may also fall within the scope of the present invention as long as they meet the purpose of the present invention.

[0023] In a preferred embodiment of the present utility model, based on the above problems existing in the prior art, a preparation device for a soft magnetic core with a quasi-circular cross section is provided. Figure 1 As shown, including:

[0024] The unloading mechanism 1 comprises a rotatable support frame 11, the rotatable support frame 11 has a central rotating shaft 111 and a plurality of supporting arms 12, the central rotating shaft 111 of the rotatable support frame 11 is connected to a rotating drive mechanism (not shown in the text), each supporting arm 12 is provided with a unloading assembly 13, and each unloading assembly 13 is used to place soft magnetic alloy strips of different widths;

[0025] A winding mechanism 2, the winding mechanism 2 is arranged on one side of the unwinding mechanism 1, and a measuring mechanism 3 is arranged on one side of the winding mechanism 2;

[0026] The central control console 4 is electrically connected to the unwinding mechanism 1, the winding mechanism 2, the measuring mechanism 3 and the rotating driving mechanism respectively.

[0027] Specifically, in the present embodiment, the unloading mechanism 1 includes a plurality of unloading components 13, and soft magnetic alloy strips of different widths are placed on each unloading component 13. When preparing a soft magnetic core with a quasi-circular cross-section, the unloading component 13 is switched by the rotatable support frame 11 according to the preparation process to send soft magnetic alloy strips of different widths to the winding mechanism 2, and the strips are received and wound by the winding mechanism 2 to prepare a soft magnetic core with a quasi-circular cross-section. Compared with the traditional preparation device that requires manual roller replacement, the utility model adopts fully automated mechanical operation, has low dependence on manpower, and has no waste output in the entire production process, which saves preparation costs. The requirements for winding a quasi-circular cross-section core can be completed on only one preparation device, eliminating the steps of disassembling and changing rollers, simplifying the production line, saving space, improving production efficiency, and facilitating mass production.

[0028] In a preferred embodiment of the present invention, Figure 1 As shown, the material discharging assembly 13 includes a material discharging roller 131 and a pair of elastic pressure rollers 132 matched with the material discharging roller 131;

[0029] The unloading roller 131 and the matching elastic pressure roller 132 can independently rotate in forward and reverse directions to obtain the soft magnetic alloy strip to be unloaded, and the elastic pressure roller 132 maintains the soft magnetic alloy strip in a state to be unloaded.

[0030] In this embodiment, Figure 1 As shown, the rotatable support frame 11 is centrally symmetrical, the number of the support arms 12 is an even number, and each support arm 12 radiates outward radially along the central rotation axis 111 of the rotatable support frame 11 .

[0031] Specifically, Figure 1 As shown, in the discharging mechanism of this embodiment, four groups of discharging components 13 are selected and marked as 1#, 2#, 3#, and 4# respectively, and the width of the soft magnetic alloy strip placed on each discharging component 13 becomes wider in sequence according to the number.

[0032] Before starting to prepare the soft magnetic core, all the unloading rollers 131 are started, and each unloading roller 131 and the matching elastic pressure roller 132 can rotate independently in the forward and reverse directions, so that one end of the soft magnetic alloy strip on the unloading roller 131 passes through between the two matching elastic pressure rollers 132 and is pressed by the two elastic pressure rollers 132, maintaining the soft magnetic alloy strip in a state to be unloaded, waiting to be wound into the magnetic core.

[0033] The support arms 12 in this embodiment are an even number, and the specific number is set according to the soft magnetic core preparation requirements. For example, 6 support arms are set, and the preparation device in this embodiment can also be used when preparing soft magnetic cores that only need to wind 5 soft magnetic alloy strips of width. It is only necessary that the number of width types of soft magnetic alloy strips placed in the unloading mechanism 1 is less than or equal to the number of support arms 12, and there is no need to set a corresponding number of support arms 11 for each soft magnetic core.

[0034] Each support arm 12 radiates outwards radially along the central rotation axis 111 of the rotatable support frame 11 and is distributed in a centrosymmetric manner, so that the rotatable support frame 11 is in a centrosymmetric shape.

[0035] In a preferred embodiment of the present invention, Figure 1 As shown, the winding mechanism 2 includes at least one guide plate 21 , a cutter 22 , a welding mechanism 23 and a winding roller 24 which are sequentially arranged along the feeding direction from the unwinding mechanism 1 to the winding mechanism 2 .

[0036] In a preferred embodiment of the present invention, the welding mechanism 23 is a resistance welding pin, which is electrically connected to the central control console 4. The central control console 4 controls the resistance welding pin 23 to weld soft magnetic alloy strips of different widths into one.

[0037] Specifically, in the present embodiment, in the process of preparing a soft magnetic core with a quasi-circular cross-section, it is necessary to wind soft magnetic alloy strips of various different widths. After completing the soft magnetic alloy strip of the current width, the soft magnetic alloy strip needs to be cut by a cutter, and then the unloading mechanism 1 switches the unloading component 13 to convey the soft magnetic alloy strip of the next width. Before winding, the two ends (the front end of the soft magnetic alloy strip of the current width and the tail end of the soft magnetic alloy strip of the previous width) are welded by the welding mechanism 23, and then the winding continues.

[0038] In addition to the above-mentioned structure, the winding mechanism 2 also includes a position sensor (not shown in the figure), which is used to detect whether the front end of the soft magnetic alloy strip of the current width sent out by the unwinding mechanism 1 accurately reaches the welding point and abuts against the tail end of the soft magnetic alloy strip of the previous width wound on the winding roller, and welding starts when the abutment occurs.

[0039] In a preferred embodiment of the present invention, the central rotation axis 111 of the rotatable support frame 11 is connected to the rotation driving mechanism, and the rotation driving mechanism is connected to the central control console 4 .

[0040] Specifically, the rotation driving mechanism in this embodiment may be a stepping motor or a servo motor.

[0041] In a preferred embodiment of the present invention, the winding mechanism 2 further comprises a pair of elastic pressure rollers 132 arranged along the feeding direction of the unwinding mechanism 1, and arranged between the winding roller 24 and the welding mechanism 23 along the feeding direction.

[0042] Specifically, Figure 1 As shown, the guide plates 21 in this embodiment include two, which are respectively arranged on both sides of the cutter 22, one of which is located below the welding mechanism 23. Together with the elastic pressure roller 132, the soft magnetic alloy strip between the feeding mechanism 1 and the winding roller 24 can be kept straight and not deformed, thereby improving the qualified rate of the soft magnetic core.

[0043] In a preferred embodiment of the utility model, the measuring mechanism 3 is a visual dimension measuring device, which converts the measured distance between the outermost soft magnetic alloy strip and the winding roller into the strip winding thickness in real time, and feeds back the winding thickness to the central control console.

[0044] Specifically, in the present embodiment, the visual dimension measuring device 3 measures the winding thickness of the soft magnetic alloy strip in real time, and feeds back the relevant information of the winding thickness to the central control console 4. When the central control console 4 receives the signal sent by the visual dimension measuring device 3 that the winding thickness of the soft magnetic alloy strip reaches a step thickness, the central control console 4 controls the rotatable support frame 11 to drive the support arm 12 to rotate so that the unloading roller 131 on which the soft magnetic alloy strip of the next width is placed reaches the set position for feeding the winding mechanism 2, and the soft magnetic alloy strip of the next width is transported to the winding mechanism 2, and the winding of the soft magnetic alloy strip of the next width begins, and the above reciprocating motion is repeated in a cycle until a magnetic core winding procedure is completed.

[0045] The working principle of the preparation device of the utility model is as follows:

[0046] 1) First, the soft magnetic alloy strips of different widths that have been cut by rollers are placed on the unloading rollers 131 in each unloading assembly 13 in the unloading mechanism 1 in the order from narrow to wide, and are respectively labeled as 1# roller, 2# roller, 3# roller, and 4# roller in the central control console, and the step thickness of the soft magnetic alloy strips of each width and the winding order of the soft magnetic alloy strips of each width are set in the central control console 4;

[0047] 2) Then, the central control console 4 starts all the unloading rollers 131, and controls each unloading roller 131 and the matching elastic pressure roller 132 to rotate independently in the positive direction, so that one end of the soft magnetic alloy strip on the unloading roller 131 passes through between the two matching elastic pressure rollers 132 and is pressed by the two elastic pressure rollers 132, so as to maintain the soft magnetic alloy strip in a state to be unloaded and wait for the winding magnetic core;

[0048] 3) Subsequently, the central control console 4 controls the rotary drive mechanism to drive the rotatable support frame 11 to rotate, so that the 1# roller reaches the set position for feeding the winding mechanism 2, and then controls the 1# roller and the corresponding elastic pressure roller 132 to rotate independently in the positive direction to convey the soft magnetic alloy strip to the guide plate 21 in the winding mechanism 2 and transmit it forward along the guide plate 21 and pass through the elastic pressure roller 132 in the winding mechanism 2, and finally convey it to the winding roller 24 to start winding;

[0049] 4) During the winding process, the measuring mechanism 3 detects the winding thickness of the soft magnetic alloy strip on the winding roller 24 in real time and uploads it to the central control console 4. When the central control console 4 determines that the winding thickness has reached the step thickness corresponding to the 1# roller, it stops conveying the soft magnetic alloy strip and controls the cutter 22 to cut the soft magnetic alloy strip. Then, the 1# roller and the corresponding elastic pressure roller 132 are controlled to rotate in the opposite direction of the conveying direction to retract the excess soft magnetic alloy strip until the front end of the soft magnetic alloy strip is just pressed by the elastic pressure roller 132 in the unwinding mechanism 1, and the winding roller 24 is controlled to continue winding to transfer the tail end of the wound soft magnetic alloy strip just to the bottom of the welding mechanism 23;

[0050] 5) The central control console 4 controls the rotary drive mechanism to drive the rotatable support frame 11 to rotate, so that the 2# roller on which the soft magnetic alloy strip of the next width is placed reaches the set position for feeding the winding mechanism 2, and then controls the 2# roller and the corresponding elastic pressure roller 132 to rotate in the positive direction to convey the soft magnetic alloy strip to the winding mechanism 2. When it is determined by the set position sensor that the front end of the soft magnetic alloy strip reaches the bottom of the welding mechanism 23, the front end of the soft magnetic alloy strip of the current width conveyed by the unloading mechanism 1 and the tail end of the soft magnetic alloy strip of the previous width wound on the winding roller 24 are welded, and then the winding continues.

[0051] Repeat the above operation in the order of 1# roller -> 2# roller -> 3# roller -> 4# roller -> 4# roller -> 3# roller -> 2# roller -> 1# roller to complete the preparation of a soft magnetic core with a quasi-circular cross-section.

[0052] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of this specification and illustrations should be included in the protection scope of the present invention.

Claims

1. A device for preparing a soft magnetic core with a quasi-circular cross section, characterized in that: include: A material discharge mechanism, wherein the material discharge mechanism comprises a rotatable support frame, wherein the rotatable support frame has a central rotation axis and a plurality of support arms, wherein the central rotation axis of the rotatable support frame is connected to a rotation drive mechanism, and each of the support arms is provided with a material discharge assembly, and each of the material discharge assemblies is respectively used to place soft magnetic alloy strips of different widths; A winding mechanism is arranged on one side of the unwinding mechanism, and a measuring mechanism is arranged on one side of the winding mechanism; A central control console is electrically connected to the unwinding mechanism, the winding mechanism, the measuring mechanism and the rotating drive mechanism respectively.

2. The preparation device according to claim 1, characterized in that: The unloading assembly comprises an unloading roller and a pair of elastic pressure rollers matched with the unloading roller; The unloading roller and the matching elastic pressure roller can independently rotate in forward and reverse directions to obtain the soft magnetic alloy strip to be unloaded, and the elastic pressure roller maintains the soft magnetic alloy strip in a state to be unloaded.

3. The preparation device according to claim 1, characterized in that: The rotatable support frame is centrally symmetrical.

4. The preparation device according to claim 1, characterized in that: The number of the support arms is an even number, and each of the support arms radiates outwardly along the radial direction of the central rotation axis of the rotatable support frame.

5. The preparation device according to claim 1, characterized in that: The winding mechanism comprises a winding roller, a welding mechanism, a cutter and at least one guide plate, and the guide plate, the cutter and the welding mechanism are arranged in sequence along the material conveying direction.

6. The preparation device according to claim 5, characterized in that: The winding mechanism further comprises a pair of elastic pressure rollers which are arranged between the winding roller and the welding mechanism along the feeding direction of the unwinding mechanism.

7. The preparation device according to claim 5, characterized in that: The welding mechanism is a resistance welding pin, which is electrically connected to the central control console. The central control console controls the resistance welding pin to weld soft magnetic alloy strips of different widths into one.

8. The preparation device according to claim 1, characterized in that: The measuring mechanism is a visual dimension measuring device, which measures the winding thickness of the soft magnetic alloy strip in real time and feeds back the winding thickness to the central control console.

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