Shaping device and shaping method for amorphous alloy closed three-dimensional wound iron core

Abstract

The invention discloses a shaping device and a shaping method for an amorphous alloy closed three-dimensional wound iron core, and belongs to the field of production and manufacturing of transformer iron cores, the shaping device comprises shaping plates, pin shafts and bolts, the shaping plates are symmetrically arranged, the same sides of the shaping plates are fixed through the pin shafts, and the other sides of the shaping plates are fastened through the bolts; the outer side face of the shaping plate is semicircular, and the inner side face of the shaping plate is of a multi-stage beveled and spliced approximate semicircular structure. The amorphous alloy closed three-dimensional wound iron core is fixed in the shaping device, the core column of the iron core is shaped through the shaping device, and the stability of the shape of the amorphous alloy closed three-dimensional wound iron core is kept. The inner side structure is consistent with the outer contour of the cross section of the amorphous alloy closed three-dimensional wound iron core column, the iron core column is shaped through the shaping device in the production process of the amorphous alloy closed three-dimensional wound iron core, and the stability of the shape of the amorphous alloy closed three-dimensional wound iron core is kept; and the deformation of the iron core caused by the gravity effect in the production process is prevented.

Description

Technical Field

[0001] The invention patent relates to the field of production and manufacturing of transformer cores, and specifically, to a forming device and a forming method for an amorphous alloy closed three-dimensional wound core. Background Art

[0002] The amorphous alloy closed three-dimensional wound core product is made by splicing three amorphous alloy single frames formed by continuously winding multiple trapezoidal amorphous strip sheets in sequence. After splicing, a shaping device is required to fix the three spliced ​​core columns to prevent the amorphous alloy closed three-dimensional wound core from being deformed due to its own heavy weight when placed upright.

[0003] At present, the device (forming sleeve) conventionally used for shaping amorphous alloy closed three-dimensional wound cores is a circular structure both inside and outside, while the cross-section of the core column of the amorphous core is a multi-stage beveled structure. The inner diameter of the forming sleeve is often smaller than the outer contour line diameter of the cross-section of the core column of the clamped core, that is, the forming sleeve is in point contact with the surface of the core column after being clamped on the amorphous core, resulting in local stress on the amorphous core, causing deterioration of the core performance.

[0004] In addition, the conventional forming sleeve is cast with pure iron, the forming sleeve has a large gravity, the cross-section of the conventional forming sleeve is a rectangular or square structure, the inner and outer widths of the conventional forming sleeve are consistent, the effective force area on the side in contact with the core column is small, and the effective fastening surface coefficient (effective contact surface area / forming sleeve weight) is low. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the present invention provides a shaping device for an amorphous alloy closed three-dimensional wound core which can effectively increase the effective force-bearing area on the side in contact with the core column and has a light body weight.

[0006] The present invention adopts the following technical solution.

[0007] The first aspect of the present invention discloses a shaping device for an amorphous alloy closed three-dimensional wound core, comprising a shaping plate, a pin and a bolt, wherein the shaping plate is symmetrically arranged, one side of the shaping plate is fixed by a pin, and the other side is fastened by a bolt;

[0008] The outer side surface of the shaping plate is semicircular, and the inner side surface is a semicircular structure that is formed by multi-stage bevel cutting;

[0009] The amorphous alloy closed three-dimensional wound core is fixed in a shaping device, and the core column is shaped by the shaping device to maintain the stability of the shape of the amorphous alloy closed three-dimensional wound core.

[0010] Preferably, the surfaces of the shaping plate, the pin shaft and the bolt are all galvanized, and the galvanizing thickness is ≥5 μm.

[0011] Preferably, the number of the semicircular shaping plates is 2, which are symmetrically arranged, and the inner multi-stage beveled and spliced ​​approximate semicircular structure has the same outer contour of the cross section of the amorphous alloy closed three-dimensional wound core column.

[0012] Preferably, the cross-section of the shaping plate is a trapezoidal structure with a narrow outer side and a wide inner side, and the ratio of the outer side to the inner side width is 1:3 to 1:4.5.

[0013] Preferably, the number of the inner multi-level beveled joint surfaces is 6-10, which is consistent with the number of broken strip levels of the amorphous alloy closed three-dimensional wound core to be shaped.

[0014] Preferably, one side of the shaping device is fixed by a pin, and the shaping plate can be opened and closed by 180°.

[0015] Preferably, the shaping device is installed on the core column of the amorphous core at equal intervals from top to bottom.

[0016] The second aspect of the present invention discloses a method for shaping an amorphous alloy closed three-dimensional wound core, based on the shaping device of the amorphous alloy closed three-dimensional wound core, comprising the following steps:

[0017] Align the single frame cores constituting the amorphous alloy closed three-dimensional wound core in pairs according to the core column edge lines;

[0018] After removing the bolts of the shaping device, install it in such a way that the outer contour of the core column fits with the multi-level chamfered surface inside the shaping device;

[0019] After the core column shaping device is installed and tightened, the outer contour diameter of the core column after tightening is measured and adjusted until the size of the test core column meets the control requirements to complete the shaping of the core.

[0020] Preferably, the single-frame core has a V-shaped included angle to its rear outer contour.

[0021] Preferably, when the bolts of the shaping devices installed on the same core are tightened, the tightening torque remains consistent.

[0022] Compared with the prior art, the beneficial effects of the present invention include at least:

[0023] The patent content solves the two disadvantages of the conventional molding sleeve when used for molding the amorphous core column, namely, point contact and heavy weight.

[0024] The amorphous core is wound with a single layer of amorphous strip with a thickness of 26μm. The core is prone to deformation when placed vertically. In order to effectively fix the size of the amorphous alloy core column, the inner diameter of the shaping sleeve is usually smaller than the designed circumscribed circle diameter of the core column, usually 1-2mm smaller. Since the cross section of the core column is similar to a polygonal structure, the circular inner shaping sleeve hoop on the core column causes the convex part of the core to contact the shaping sleeve in a point-like manner, and the force is concentrated on the convex part of the cross section of the core column. The core column is subjected to uneven stress, resulting in a large discreteness in the final performance of the core. Conventional shaping sleeves are made of cast iron, the shaping sleeve has a large weight, and the cross section of the conventional shaping sleeve is a rectangular or square structure. The effective force area on the side in contact with the core column is small, and the effective fastening surface coefficient (effective contact surface area / shaping sleeve weight) is low.

[0025] The inner side of the shaping device of the present invention adopts a multi-stage bevel structure, and the inclination of each bevel is parallel to the outer contour line of the cross section of the iron core column. When shaping the iron core column, a surface contact method is adopted. When the iron core column is tightened, the shaping device can be closely attached to the surface of the core column to prevent the iron core column from being subjected to point-like stress when the shaping sleeve is tightened, thereby affecting the performance. The shaping device adopts a cross-sectional structure of an isosceles trapezoid, which is wide on the side close to the iron core column and narrow on the side away from the iron core column, thereby increasing the stress area on the surface of the iron core column; the shaping device is produced by aluminum alloy or high temperature resistant resin material, which reduces the weight of the shaping device, reduces the influence of the heavy weight of the shaping device on the performance of the iron core, and reduces the labor intensity of the operator when installing or removing the shaping device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a device for shaping amorphous alloy closed three-dimensional coiled core (top view);

[0027] Figure 2 1. It is a schematic diagram of the screw holes of the amorphous alloy closed three-dimensional coil core shaping device;

[0028] Figure 3 1. It is a schematic diagram of a trapezoidal cross section of a forming device of an amorphous alloy closed three-dimensional wound core forming device;

[0029] Figure 4 It is a schematic cross-sectional view of an amorphous alloy closed three-dimensional coil core shaping device;

[0030] Figure 5 It is a closed three-dimensional coiled core forming plate of amorphous alloy (top view);

[0031] Figure 6 It is a closed three-dimensional coiled core forming plate of amorphous alloy (front view);

[0032] Figure 7 It is an amorphous alloy closed three-dimensional coiled core pin;

[0033] Figure 8 1. It is a schematic diagram of the cross section of a closed three-dimensional wound core column of an amorphous alloy;

[0034] Fig. 9 This is the front view of the amorphous alloy closed three-dimensional wound core after the shaping device is installed;

[0035] Fig.10 It is a top view of the amorphous alloy closed three-dimensional wound core after the shaping device is installed;

[0036] In the figure: 01. Pin; 02. Shaping plate; 03. Bolt; 04. Screw hole; 05. Trapezoidal cross section of the shaping device; 0501. Section close to the core column side (inside of the shaping device); 0502. Section away from the core column side (outside of the shaping device); 06. Positioning screw hole; 07. Cross section of the three-dimensional rolled core column; 08. Outside of the shaping device; 09. Inside of the shaping device. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only embodiments of a part of the present invention, rather than all embodiments. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0038] Embodiment 1 of the present invention provides a shaping device for an amorphous alloy closed three-dimensional wound core, which is used to fix the core column size during the production process of the amorphous alloy closed three-dimensional wound core.

[0039] like Figure 1-Figure 8 As shown, the shaping device comprises two left and right semicircular multi-stage beveled shaping plates 02, one side of which is fixed by a pin 01, so that the two shaping plates can be opened and closed 180°; the other end is fastened by a bolt 03. The outer side 08 of the shaping device is circular, and the inner side 09 of the shaping device is an approximate circle of multi-stage beveled splicing. The arc length and angle of the multi-stage beveled are consistent with the cross section 07 of the amorphous alloy closed three-dimensional wound core column to be fastened.

[0040] The surfaces of the shaping plate 02, the pin shaft 01 and the bolt 03 are all galvanized, and the galvanizing thickness is ≥5μm.

[0041] The approximately semicircular structure of the inner multi-stage beveled joint 09 is consistent with the outer contour of the cross section of the amorphous alloy closed three-dimensional wound core column.

[0042] The cross section of the shaping plate 02 is a trapezoidal structure with a narrow outer side and a wide inner side, and the width ratio of the outer side to the inner side is 1:3 to 1:4.5. The side close to the core column is wide and the side away from the core column is narrow, thereby increasing the force-bearing area of ​​the core column surface.

[0043] The number of the multi-level beveled and spliced ​​surfaces on the inner side is 6-10, and the specific number is consistent with the number of broken strip levels of the amorphous alloy closed three-dimensional coiled core that needs to be shaped.

[0044] In a preferred but non-limiting embodiment of the present invention, the shaping plate 02 is produced by aluminum alloy or high-temperature resistant resin material, thereby reducing the weight of the shaping device, reducing the impact of the heavy weight of the shaping device on the core performance, and reducing the labor intensity of operators when installing or removing the shaping device.

[0045] The characteristic of the shaping device is that the inner structure is consistent with the outer contour of the cross-section of the amorphous alloy closed three-dimensional wound core core column. During the production process of the amorphous alloy closed three-dimensional wound core, the core column is shaped by the shaping device to maintain the stability of the shape of the amorphous alloy closed three-dimensional wound core and prevent the core from being deformed due to gravity during the production process.

[0046] In a preferred but non-restrictive embodiment of the present invention, after the amorphous alloy closed three-dimensional wound core single frame is formed, three single frames are assembled on an assembly table. After assembly, the shaping device is clamped on the three core columns of the amorphous core. Amorphous cores with large capacity often have longer core columns, and more shaping devices are required to be fixed on the core columns to prevent deformation of the core columns.

[0047] For example, 9 forming devices must be installed on the core columns of amorphous cores with a capacity of 100kVA and 200kVA, 12 forming devices must be installed on the core columns of amorphous cores with a capacity of 400kVA and 630kVA, and 15 forming devices must be installed on the core columns of amorphous cores with a capacity of more than 630kVA.

[0048] Taking the 400kVA amorphous alloy closed three-dimensional wound core as an example, four shaping devices are installed on each of the three core columns of the amorphous core at equal intervals from top to bottom, and a single complete amorphous alloy closed three-dimensional wound core needs to be installed with a total of 12 shaping devices; taking the 200kVA amorphous alloy closed three-dimensional wound core as an example, three shaping devices are installed on each of the three core columns of the amorphous core from top to bottom, and a single core needs to be installed with a total of 9 shaping devices. The schematic diagram of the 400kVA amorphous alloy closed three-dimensional wound core after installing the shaping device is shown in the figure below. Figure 9-10 shown.

[0049] Embodiment 2 of the present invention provides a shaping device and shaping method for an amorphous alloy closed three-dimensional wound core, comprising the following steps:

[0050] Step 1, aligning three single-frame cores constituting the amorphous alloy closed three-dimensional wound core in pairs according to the core column edge lines;

[0051] Specifically, the three single-frame small cores constituting the amorphous alloy closed three-dimensional wound core are hoisted onto the assembly platform, and are aligned in pairs according to the core column edge lines. When viewed from top to bottom, the interior of the core forms an equilateral triangle; the single-frame small core forms a "V" shape with its outer contour behind it. The schematic diagram of the assembled core is shown in the figure below. Figure 9-10 shown.

[0052] Step 2: After removing the bolts of the shaping device, install and fix it in a manner that the outer contour line of the core column fits with the multi-level chamfered surface inside the shaping device;

[0053] In a preferred but non-limiting embodiment of the present invention, when the bolts of the shaping devices installed on the same core are tightened, the final tightening torque should be kept consistent.

[0054] Further preferably, when installing the shaping device on the same core column, it is fixed in the manner of "middle first, then both ends", that is, the middle position of the core column is fixed first, and then the lower and upper ends of the core column are fixed.

[0055] Step 3, after the core column shaping device is installed and tightened, the outer contour diameter of the core column after tightening is measured, and the shaping is completed when the control requirements are met.

[0056] Specifically, it includes using a vernier caliper to measure the outer contour diameter of the core column after tightening, and the measuring positions are the upper and lower ends of the core column and the middle position between the shaping devices.

[0057] In a preferred but non-limiting embodiment of the present invention, when the test result meets the requirements for the control of the core column diameter size, the shaping device does not make position adjustment;

[0058] When the test result exceeds the control requirement of the core column outer diameter, it can be adjusted by increasing the tightening torque of the shaping device or reinstalling the shaping device until the size of the test core column meets the control requirement.

[0059] Compared with the prior art, the beneficial effects of the present invention include at least:

[0060] The patent content solves the two disadvantages of the conventional molding sleeve when used for molding the amorphous core column, namely, point contact and heavy weight.

[0061] The amorphous core is wound with a single layer of amorphous strip with a thickness of 26μm. The core is prone to deformation when placed vertically. In order to effectively fix the size of the amorphous alloy core column, the inner diameter of the shaping sleeve is usually smaller than the designed circumscribed circle diameter of the core column, usually 1-2mm smaller. Since the cross section of the core column is similar to a polygonal structure, the circular inner shaping sleeve hoop on the core column causes the convex part of the core to contact the shaping sleeve in a point-like manner, and the force is concentrated on the convex part of the cross section of the core column. The core column is subjected to uneven stress, resulting in a large discreteness in the final performance of the core. Conventional shaping sleeves are made of cast iron, the shaping sleeve has a large weight, and the cross section of the conventional shaping sleeve is a rectangular or square structure. The effective force area on the side in contact with the core column is small, and the effective fastening surface coefficient (effective contact surface area / shaping sleeve weight) is low.

[0062] The inner side of the shaping device of the present invention adopts a multi-stage bevel structure, and the inclination of each bevel is parallel to the outer contour line of the cross section of the iron core column. When shaping the iron core column, a surface contact method is adopted. When the iron core column is tightened, the shaping device can be closely attached to the surface of the core column to prevent the iron core column from being subjected to point-like stress when the shaping sleeve is tightened, thereby affecting the performance. The shaping device adopts a cross-sectional structure of an isosceles trapezoid, which is wide on the side close to the iron core column and narrow on the side away from the iron core column, thereby increasing the stress area on the surface of the iron core column; the shaping device is produced by aluminum alloy or high temperature resistant resin material, which reduces the weight of the shaping device, reduces the influence of the heavy weight of the shaping device on the performance of the iron core, and reduces the labor intensity of the operator when installing or removing the shaping device.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A shaping device for an amorphous alloy closed three-dimensional wound core, characterized in that: It comprises a shaping plate (02), a pin shaft (01) and a bolt (03); the shaping plate (02) is symmetrically arranged, one side of the shaping plate is fixed by the pin shaft (01), and the other side is fastened by the bolt (03); The outer side surface of the shaping plate (02) is semicircular, and the inner side surface is a nearly semicircular structure formed by multi-stage bevel cutting and splicing; The amorphous alloy closed three-dimensional wound core is fixed in a shaping device, and the core column is shaped by the shaping device to maintain the stability of the shape of the amorphous alloy closed three-dimensional wound core.

2. The shaping device of the amorphous alloy closed three-dimensional wound core according to claim 1, characterized in that: The surfaces of the shaping plate (02), the pin shaft (01) and the bolt (03) are all galvanized, and the galvanizing thickness is ≥5μm.

3. The shaping device of the amorphous alloy closed three-dimensional wound core according to claim 1, characterized in that: The number of the semicircular shaping plates (02) is 2 and they are symmetrically arranged. The inner multi-stage beveled and spliced ​​approximate semicircular structure has the same outer contour of the cross section of the amorphous alloy closed three-dimensional wound core column.

4. The shaping device of the amorphous alloy closed three-dimensional wound core according to claim 3, characterized in that: The cross section of the shaping plate (02) is a trapezoidal structure with a narrow outer side and a wide inner side, and the ratio of the outer side to the inner side width is 1:3 to 1:4.

5.

5. The shaping device of the amorphous alloy closed three-dimensional wound core according to claim 2, characterized in that: The number of the multi-level beveled and spliced ​​surfaces on the inner side is 6-10, which is consistent with the number of broken strip levels of the amorphous alloy closed three-dimensional wound core that needs to be shaped.

6. The shaping device of the amorphous alloy closed three-dimensional wound core according to claim 1, characterized in that: One side of the shaping device is fixed by a pin (01), and the shaping plate can be opened and closed by 180 degrees.

7. The shaping device for an amorphous alloy closed three-dimensional wound core according to claim 1, characterized in that: The shaping device is installed on the core column of the amorphous core at equal intervals from top to bottom.

8. A shaping method for an amorphous alloy closed three-dimensional wound core, based on a shaping device for an amorphous alloy closed three-dimensional wound core according to any one of claims 1 to 7, characterized in that: The following steps are involved: Align the single frame cores constituting the amorphous alloy closed three-dimensional wound core in pairs according to the core column edge lines; After removing the bolts of the shaping device, install it in such a way that the outer contour of the core column fits with the multi-level chamfered surface inside the shaping device; After the core column shaping device is installed and tightened, the outer contour diameter of the core column after tightening is measured and adjusted until the size of the test core column meets the control requirements to complete the shaping of the core.

9. The method for shaping an amorphous alloy closed three-dimensional wound core according to claim 8, characterized in that: The single frame core has a "V" shape at an angle to its rear outer contour.

10. The method for shaping an amorphous alloy closed three-dimensional wound core according to claim 8, characterized in that: When the bolts of the shaping device installed on the same iron core are tightened, the tightening torque remains consistent.

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