Single-frame iron core forming method

Abstract

The present invention relates to a method for forming a single-frame iron core. The method for forming a single-frame iron core includes: winding a strip on a first inner support to form an annular single-frame matrix, where the first inner support is elliptical annular or quasi-elliptical annular; sleeving the annular single-frame matrix on a supporting square module; along the long axis direction of the first inner support, the two module units of the supporting square module are separated at one time to stretch the annular single-frame matrix into a first rectangular single-frame matrix, and the length of the first rectangular single-frame matrix in the long axis direction of the first inner support is greater than the length of the first rectangular single-frame matrix in the short axis direction of the first inner support. By adopting the above technical solution, the forming degree of the first rectangular single-frame matrix can be higher, and the driving force of the driving member for driving the separation of the two module units can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and particularly to a method for forming a single-frame iron core. Background Art

[0002] During the processing of a single-frame iron core, an amorphous alloy strip is generally wound around a circular inner support, and a driving member drives a square-supporting structure to stretch the strip and the inner support into a rectangular single-frame iron core. In the above technical solution, the inner support and the strip are stretched from a circular shape to a rectangular shape, so that the deformation amount of the strip and the inner support in the length direction of the single-frame iron core is relatively large, resulting in relatively large stress at the corners of the single-frame iron core after stretching, thereby resulting in poor forming degree of the rectangular single-frame of the wound iron core, and even problems such as bulging at the core column part of the single-frame iron core, resulting in a relatively high defective rate of the single-frame of the wound iron core and waste of raw materials. Summary of the Invention

[0003] Based on this, in view of the problem that the existing method for forming a single-frame iron core results in poor forming degree of the single-frame iron core, it is necessary to provide a method for forming a single-frame iron core.

[0004] The present invention provides a method for forming a single-frame iron core, which includes: winding a strip around a first inner support to form an annular single-frame matrix, where the first inner support is an elliptical ring or a quasi-elliptical ring; sleeving the annular single-frame matrix on a square-supporting module, and along the long axis direction of the first inner support, two module units of the square-supporting module are separated at one time to stretch the annular single-frame matrix into a first rectangular single-frame matrix, and the length of the first rectangular single-frame matrix in the long axis direction of the first inner support is greater than the length of the first rectangular single-frame matrix in the short axis direction of the first inner support.

[0005] In one embodiment, the method for forming a single-frame iron core further includes: along the long axis direction of the first inner support, the two module units are separated a second time to stretch the first rectangular single-frame matrix into a second rectangular single-frame matrix.

[0006] In one embodiment, before the step of separating the two module units a second time, the following steps are further included: passing a second inner support through the first rectangular single-frame matrix and sleeving the second inner support on the square-supporting module, where the second inner support is an annular ring; in the step of separating the two module units a second time, the two module units are separated and stretched to stretch the second inner support, and the stretched second inner support and the second rectangular single-frame form a third rectangular single-frame.

[0007] In one embodiment, the step of separating the two module units of the square-supporting module at one time to stretch the annular single-frame matrix into a first rectangular single-frame matrix is specifically: sleeving an auxiliary mold between the annular single-frame matrix and the square-supporting module, where two mold units in the auxiliary mold are respectively sleeved on the outside of the two module units, and the two mold units move away from each other as the two module units are separated at one time.

[0008] In one embodiment, the die unit includes a first side plate, a second side plate, and a third side plate. The first side plate is perpendicular to the second side plate. Both the first side plate and the third side plate are parallel to the long axis direction of the first inner support. The first side plate and the third side plate are respectively located on both sides of the second side plate. The second side plate is located on the side of the module unit away from the other module unit. The first side plate and the third side plate are respectively located on both sides of the module unit.

[0009] In one embodiment, the auxiliary die further includes a support plate and two side plates. The two side plates are arranged in parallel, and the two side plates are respectively fixedly connected to both sides of the bottom of the support plate. The two die units are respectively slidably connected to both ends of the bottom of the support plate. In the step of stretching the annular single-frame base into the first rectangular single-frame base by separating the two module units of the support square module at one time, the side plates are located on both sides of the two module units, and the support plate is lapped on the annular single-frame base.

[0010] In one embodiment, before the step of passing a second inner support through the first rectangular single-frame base and sleeving the second inner support on the support square module, the following steps are further included: disassembling the auxiliary die and placing the second inner support between the module unit and the first rectangular single-frame base.

[0011] In one embodiment, the second inner support is a rectangular ring structure. In the step of passing the second inner support through the first rectangular single-frame base and sleeving the second inner support on the support square module, the two inner side walls of the second inner support in the long axis direction of the first inner support are in contact with the support square module. The gap between the two outer side walls of the second inner support in the long axis direction of the first inner support and the inner wall of the first rectangular single-frame base is less than 1.5 mm. The gap between the two inner side walls of the second inner support in the short axis direction of the first inner support and the module unit is less than 1 mm. The two outer side walls of the second inner support in the short axis direction of the first inner support are in contact with the first rectangular single-frame base.

[0012] In one embodiment, the module unit includes a first section and a second section connected to each other. The circumferential structural dimension of the first section is smaller than that of the second section. The second section is located below the first section. In the step of sleeving the auxiliary die between the annular single-frame base and the support square module, the die unit is sleeved on the first section. In the step of passing the second inner support through the first rectangular single-frame base and sleeving the second inner support on the support square module, the second inner support is sleeved on the first section.

[0013] In one embodiment, the inner frames of the first rectangular single-frame base, the second rectangular single-frame base, and the third rectangular single-frame base are rectangular structures. There are transition arc surfaces between the adjacent two side walls of the first rectangular single-frame base and the second rectangular single-frame base.

[0014] In one embodiment, in the primary separation step of two module units, the two module units are separated by a first driving member; in the secondary separation step of the two module units, a second driving member is placed between the two module units, and the first driving member and the second driving member simultaneously drive the two module units to separate.

[0015] In one embodiment, in the step of winding a strip around a first inner support to form an annular single-frame base body, a mandrel is sleeved inside the first inner support, and the mandrel is in contact with the first inner support; in the step of sleeving the annular single-frame base body on a square support module, the square support module drives the mandrel to separate from the first inner support.

[0016] In one embodiment, the square support module is arranged on an operating table. In the step of sleeving the annular single-frame base body on the square support module, the annular single-frame base body is placed on the operating table, and a support member is arranged between the operating table and the annular single-frame base body. The support member is in contact with the inner wall of the annular single-frame base body to support the annular single-frame base body.

[0017] In one embodiment, the single-frame iron core forming method further includes: wrapping a fixing band around the outermost layer of the strip, and connecting the head and tail ends of the fixing band to each other to form an outer hoop.

[0018] In this technical solution, the method for forming a single-frame iron core includes: winding a strip on a first inner support to form an annular single-frame matrix, where the first inner support is an elliptical ring or a quasi-elliptical ring; sleeving the annular single-frame matrix on a splitting module, and along the long axis direction of the first inner support, the two module units of the splitting module are separated at one time to stretch the annular single-frame matrix into a first rectangular single-frame matrix, and the length of the first rectangular single-frame matrix in the long axis direction of the first inner support is greater than the length of the first rectangular single-frame matrix in the short axis direction of the first inner support. In the above technical solution, since the two module units are separated at one time along the long axis direction of the first inner support and stretch the annular single-frame matrix into a first rectangular single-frame matrix, and the length of the first rectangular single-frame matrix in the long axis direction of the first inner support is greater than the length of the first rectangular single-frame matrix in the short axis direction of the first inner support, the deformation amount of the annular single-frame matrix during the stretching process is small, that is, the deformation amounts of the first inner support and the strip can be small, so that the stress at the corners of the first rectangular single-frame matrix can be small, and the forming degree of the first rectangular single-frame matrix can be better, improving the performance of the single-frame iron core. By adopting the above technical solution, the deformation amount of the annular single-frame matrix during the process of being stretched into a first rectangular single-frame matrix is small, which can reduce the driving force for separating the two module units, thereby reducing the performance requirements for the driving member for separating the two module units, that is, the cost of the driving member can be reduced, and further the overall cost of the production equipment can be reduced. In addition, in the above technical solution, the first inner support is an elliptical ring or a quasi-elliptical ring, which can make the outer peripheral surface of the first inner support smooth without corners, so that the strip can fit better with the first inner support, and can avoid the strip from deforming and breaking due to large stress at the corners. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a flowchart of the method for forming a single-frame iron core provided by an embodiment;

[0020] Figure 2 It is a schematic structural diagram of an annular single-frame matrix sleeved on a splitting module provided by an embodiment;

[0021] Figure 3 It is an exploded view of a single annular single-frame matrix, a support frame and a splitting module provided by an embodiment;

[0022] Figure 4 It is a schematic structural diagram of a first perspective of an auxiliary mold provided by an embodiment;

[0023] Figure 5 It is a schematic structural diagram of a second perspective of an auxiliary mold provided by an embodiment;

[0024] Figure 6 It is a schematic structural diagram of a third perspective of an auxiliary mold provided by an embodiment;

[0025] Figure 7 Schematic structural diagram of a mandrel provided for an embodiment.

[0026] Description of component labels:

[0027] 1. Tape; 2. First inner support; 3. Ring-shaped single-frame base; 4. Bracing block module; 41. Module unit; 411. First section; 412. Second section; 5. Auxiliary mold; 51. Mold unit; 511. First side plate; 512. Second side plate; 513. Third side plate; 52. Support plate; 53. Side plate; 6. Support member; 7. Mandrel; 71. Wedge block; 72. Mounting through hole. Detailed implementation manners

[0028] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following describes the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships 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 thus should not be construed as limiting the present invention.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0034] An embodiment of the present invention provides a method for forming a single-frame iron core. Refer to Figure 1 , the method for forming a single-frame iron core includes:

[0035] Winding a strip 1 around a first inner support 2 to form an annular single-frame base body 3, and the first inner support 2 is an elliptical ring or a quasi-elliptical ring (refer to Figure 2 );

[0036] The annular single-frame base body 3 is sleeved on a square support module 4, and along the long axis direction of the first inner support 2, the two module units 41 of the square support module 4 are separated at one time to stretch the annular single-frame base body 3 into a first rectangular single-frame base body, and the length of the first rectangular single-frame base body in the long axis direction of the first inner support 2 is greater than the length of the first rectangular single-frame base body in the short axis direction of the first inner support 2.

[0037] In the above technical solution, the cross-section of the annular single-frame base body 3 is semi-circular, the outer side wall of the annular single-frame base body 3 is a conical surface, the inner side wall of the annular single-frame base body 3 is an arc surface, and the outer side wall of the annular single-frame base body 3 is an assembly surface. During the forming process of the single-frame iron core, the inner side wall of the annular single-frame base body 3 faces downward, and the inner side walls of the first rectangular single-frame base body and the second rectangular single-frame base body both face downward. In this way, it is not necessary to flip during the production of the single-frame wound core, and it is not necessary to flip when assembling multiple single-frame wound cores, improving the processing efficiency and avoiding the loosening and deformation of the strip 1 caused by flipping the single-frame wound core, reducing the defective rate.

[0038] Optionally, the strip is made of amorphous alloy, and the first inner support 2 and the second inner support are made of steel material.

[0039] In the above technical solution, since the two module units 41 are separated once along the long axis direction of the first inner support 2 and the annular single-frame base body 3 is stretched into the first rectangular single-frame base body, and the length of the first rectangular single-frame base body in the long axis direction of the first inner support 2 is greater than the length of the first rectangular single-frame base body in the short axis direction of the first inner support 2, the deformation amount of the annular single-frame base body 3 during the stretching process is smaller, that is, the deformation amounts of the first inner support 2 and the strip 1 can be smaller, so that the stress at the corners of the first rectangular single-frame base body can be smaller, and the forming degree of the first rectangular single-frame base body can be better, improving the performance of the single-frame iron core. In addition, adopting the above technical solution, the deformation amount of the annular single-frame base body 3 during the process of being stretched into the first rectangular single-frame base body is smaller, so that the driving force for separating the two module units 41 can be reduced, thereby reducing the performance requirements for the driving member for separating the two module units 41, that is, the cost of the driving member can be reduced, and then the overall cost of the production equipment can be reduced. In addition, the first inner support 2 is an elliptical ring or a quasi-elliptical ring, so that the outer peripheral surface of the first inner support 2 is smooth without corners, so that the strip 1 can fit better with the first inner support 2, and the stress of the strip 1 at the corners can be avoided from being large, resulting in the deformation and fracture of the strip.

[0040] In an embodiment, the single-frame iron core forming method further includes: along the long axis direction of the first inner support 2, the two module units 41 are separated twice to stretch the first rectangular single-frame base body into the second rectangular single-frame base body. Adopting the above technical solution, the module units 41 are separated once and then twice along the long axis direction of the first inner support 2, stretching the annular single-frame base body 3 into the first rectangular single-frame base body and then into the second rectangular single-frame base body, so that the driving force for separating the module units 41 can be reduced, thereby reducing the performance requirements for the driving member for separating the two module units 41, and then reducing the cost of the driving member, that is, reducing the overall cost of the production equipment; and after two stretches, the annular single-frame base body is stretched into the second rectangular single-frame base body, which can make the forming degree of the second rectangular single-frame base body higher, thereby improving the performance of the single-frame iron core.

[0041] In one embodiment, before the secondary separation of the two module units, the following steps are further included: a second inner support is inserted into the first rectangular single-frame base body, and the second inner support is sleeved on the support square module. The second inner support is annular. In the step of secondary separation of the two module units, the second inner support is stretched when the two module units are separated for the second time, and the stretched second inner support and the second rectangular single-frame form a third rectangular single-frame. With the above technical solution, the stretched second inner support and the first inner support are parts of the third rectangular single-frame, which can reduce the thickness of the first inner support, further reduce the driving force for separating the driving module unit 41, that is, further reduce the performance requirements for the driving member, and can also improve the forming degree of the first rectangular single-frame. In addition, to make the structural dimensions of the third rectangular single-frame meet the requirements, the inner support thickness of the third rectangular single-frame needs to meet a certain amount. The structural strength of the superposition of the first inner support 2 and the second inner support is less than the structural strength of the inner support with a thickness equal to the sum of the thicknesses of the first inner support 2 and the second inner support. Therefore, with the above technical solution, the driving force for the secondary separation of the two module units 41 can be reduced, that is, the performance requirements for the driving member can be further reduced.

[0042] In one embodiment, the step of stretching the annular single-frame base body 3 into the first rectangular single-frame base body when the two module units 41 in the support square module 4 are separated for the first time is specifically as follows: an auxiliary mold 5 is sleeved between the annular single-frame base body 3 and the support square module 4, and the two mold units 51 in the auxiliary mold 5 are respectively sleeved on the outer sides of the two module units 41, and the two mold units 51 move in a direction away from each other as the two module units 41 are separated for the first time. In the above technical solution, when the support square module 4 is separated for the first time, the mold unit 51 is in contact with the inner side wall of the first rectangular single-frame base body.

[0043] In one embodiment, before the step of inserting the second inner support into the first rectangular single-frame base body and sleeving the second inner support on the support square module, the following steps are further included: removing the auxiliary mold 5 and placing the second inner support between the module unit 41 and the first rectangular single-frame base body. After removing the auxiliary mold 5, there is a gap between the module unit 41 and the first rectangular single-frame base body, which facilitates the placement of the second inner support. In the above steps, before the step of placing the second inner support between the module unit 41 and the first rectangular single-frame base body, the two module units 41 need to be slightly moved closer in the first direction to facilitate the installation of the second inner support.

[0044] Refer to Figures 4 to 6, in one embodiment, the module unit 41 is a rectangular structure. The die unit 51 includes a first side plate 511, a second side plate 512 and a third side plate 513. The first side plate 511 is perpendicular to the second side plate 512. The first side plate 511 and the third side plate 513 are arranged in parallel. The first side plate 511 and the third side plate 513 are respectively located on both sides of the second side plate 512. The third side plate 513 is located on the side of the module unit 41 away from the other module unit 41. The first side plate 511 and the third side plate 513 are located on both sides of the module unit 41. When the two module units 41 are separated at one time, the first side plate 511, the second side plate 512 and the third side plate 513 are all in contact with the module unit 41, so as to prevent the annular single-frame matrix 3 from being stretched into the first rectangular single-frame matrix, and there is no mutual shaking between the module unit 41 and the die unit 51, so that the forming degree of the first rectangular single-frame matrix can be guaranteed to be relatively high.

[0045] Refer to Figures 4 to 6 , in one embodiment, the auxiliary die 5 further includes a support plate 52 and two side plates 53. The two side plates 53 are arranged in parallel. The two side plates 53 are respectively fixedly connected to both sides of the bottom of the support plate 52. The two die units 51 are respectively slidably connected to both ends of the bottom of the support plate 52. In the step of stretching the annular single-frame matrix 3 into the first rectangular single-frame matrix when the two module units 41 are separated at one time, the side plates 53 are located on both sides of the two module units 41, and the support plate 52 is lapped on the annular single-frame matrix 3. Optionally, the first side plate 511 and the third side plate 513 of the die unit 51 are respectively flush with the two side plates 53, so that the inner side wall of the first rectangular single-frame matrix is in contact with the two side plates 53, thereby further improving the straightness of the first rectangular single-frame matrix. Since there will be a gap between the two module units 41 when they are separated, with the above structure, it can prevent the strip 1 and the first inner support 2 from being sunken into the gap between the two module units 41 when the annular single-frame matrix 3 is stretched into the first rectangular single-frame matrix, thereby improving the straightness of the first rectangular single-frame matrix. With the above structure, the support plate 52 is lapped on the annular single-frame matrix 3, and the structural stability of the support plate 52 is relatively good, so as to prevent the support plate 52 from being displaced when the two module units 41 are separated at one time and affecting the forming degree of the first rectangular single-frame matrix.

[0046] In one embodiment, the inner frames of the first rectangular single-frame matrix and the third rectangular single-frame matrix are rectangular structures, and there are transition arc surfaces between adjacent side walls of the first rectangular single-frame matrix and the third rectangular single-frame matrix. In this way, the strip 1 on the first rectangular single-frame matrix and the third rectangular single-frame matrix can have transition arc surfaces at the bending parts, so as to prevent the strip 1 from being deformed and broken.

[0047] Specifically, since the inner wall of the first rectangular single-frame base body is in contact with the auxiliary mold 5, and the inner wall of the third rectangular single-frame base body is in contact with the supporting square module 4. There are transition arc surfaces between the first side plate 511 and the second side plate 512 of the mold unit 51, and between the second side plate 512 and the third side plate 513, so that when the module unit 41 stretches the annular single-frame base body 3 into the first rectangular single-frame base body, there is a transition arc surface at the connection of the inner side walls of the first rectangular single-frame base body. The part of the module unit 41 for stretching the first rectangular single-frame base body is a rectangular structure, and there is a transition arc surface between the adjacent two side walls of the module unit 41, so that when the module unit 41 stretches the second rectangular single-frame base body into the third rectangular single-frame base body, there is a transition arc surface between the inner side walls of the first rectangular single-frame base body.

[0048] In an embodiment, the second inner support is a rectangular ring structure, and transition arc surfaces are provided at the corners of the second inner support, so that after the second inner support is stretched, it is in contact with the first rectangular single-frame base body and the module unit 41. When the second inner support is inserted into the first rectangular single-frame base body and sleeved on the supporting square module, the two inner side walls of the second inner support in the long axis direction of the first inner support are in contact with the supporting square module 4, and the gap between the two outer side walls of the second inner support in the long axis direction of the first inner support and the inner wall of the first rectangular single-frame base body is less than 1.5 mm; the gap between the two inner side walls of the second inner support in the short axis direction of the first inner support and the module unit 41 is less than 1 mm, and the two outer side walls of the second inner support in the short axis direction of the first inner support are in contact with the first rectangular single-frame base body. Since when the two module units 41 are separated for the second time, the second inner support and the first rectangular single-frame base body are stretched in the long axis direction of the first inner support, so that the two inner side walls of the second inner support in the long axis direction of the first inner support are in contact with the supporting square module 4, it can make the forming degree of the second inner support better after being stretched by the supporting square module 4, that is, the forming degree of the third rectangular single-frame base body is better; since when the second inner support is stretched, the positions of the two side walls of the second inner support in the short axis direction of the first inner support in the short axis direction of the first inner support do not change, so that the two outer side walls of the second inner support in the short axis direction of the first inner support are in contact with the first rectangular single-frame base body, it can make the stretched second inner support in the third rectangular single-frame base body in contact with the second rectangular single-frame base body. In addition, the gap between the two outer side walls of the second inner support in the long axis direction of the first inner support and the inner wall of the first rectangular single-frame base body is less than 1.5 mm, and the gap between the two inner side walls of the second inner support in the short axis direction of the first inner support and the module unit 41 is less than 1 mm. Such a setting facilitates the installation of the second inner support between the supporting square module 4 and the first rectangular single-frame base body.

[0049] Refer to Figure 3, in one embodiment, the module unit 41 includes a first section 411 and a second section 412 connected to each other. The circumferential structural dimension of the first section 411 is smaller than that of the second section 412, and the second section 412 is located below the first section 411. In the step of sleeving the auxiliary mold 5 between the annular single-frame base 3 and the support square module 4, the mold unit 51 is sleeved on the first section 411, and the mold unit 51 overlaps on the second section 412 to support the mold unit 51. In the step of passing a second inner support through the first rectangular single-frame base and sleeving the second inner support on the support square module, the second inner support is sleeved on the first section 411, and the second inner support overlaps on the second section 412. The second section 412 is used to support the second inner support so that the second inner support is maintained between the support square module 4 and the first rectangular single-frame base and can keep the second inner support in a specified position axially.

[0050] In one embodiment, in the primary separation step of the module unit 41, two module units 41 are separated by a first driving member; in the secondary separation step of the module unit 41, a second driving member is placed between the two module units 41, and the first driving member and the second driving member drive the two module units 41 to separate simultaneously. Since there is only the first inner support 2 inside the annular single-frame base 3, in the primary separation step of the module unit 41, the first driving member drives the module unit 41 to stretch the annular single-frame base 3 into a first rectangular single-frame base, and a relatively small driving force of the first driving member can complete the primary separation of the module unit 41. Since in the secondary separation step of the module unit 41, the module unit 41 stretches the second inner support and the first rectangular single-frame base, therefore, adopting the above technical solution, the first driving member and the second driving member drive the module unit 41 to separate secondly simultaneously, so that relatively small driving forces of the first driving member and the second driving member can complete the secondary separation of the module unit 41. Therefore, adopting the above technical solution can reduce the performance requirements for the first driving member and the second driving member, thereby reducing the overall cost of the production equipment. Optionally, the thickness of the second inner support can be made greater than that of the first inner support 2, so that the strength of the first inner support 2 is smaller, thereby reducing the driving force for driving the two module units 41 to separate primarily, and further reducing the performance requirements for the first driving member; and although the strength of the second inner support is greater, the first driving member and the second driving member drive the support square module 4 to separate secondly and stretch the second inner support and the first rectangular single-frame base simultaneously, so that the driving force requirements for the first driving member and the second driving member are further reduced. Optionally, the first driving member is a hydraulic cylinder, and the second driving member is a hydraulic mine.

[0051] Refer to Figure 7 It should be noted that the term "hydraulic mine" in the original text seems rather unusual in this context. It might be a misnomer or an incorrect term. You may want to double-check the accuracy of this part in the original source., in one embodiment, in the step of winding the strip 1 around the first inner support 2 to form the annular single-frame matrix 3, a mandrel 7 is sleeved inside the first inner support 2, and the mandrel 7 is in contact with the first inner support 2; in the step of sleeving the annular single-frame matrix 3 on the square support module 4, the square support module 4 drives the mandrel 7 to separate from the first inner support 2. By providing the mandrel 7, when winding the strip 1 around the first inner support 2 to form the annular single-frame matrix 3, the first inner support 2 will not deform when the strip 1 is wound around it, so that the structural dimensions of the annular single-frame matrix 3 can meet the standards. The mandrel 7 has a circular structure, and there is a notch on the side wall of the mandrel 7. When the mandrel 7 is inserted into the first inner support 2, the wedge block 71 is fixed in the notch so that the mandrel 7 is in contact with and fixed to the first inner support 2. The shape of the wedge block 71 is the same as the shape of the notch.

[0052] Refer to Figure 3 , in one embodiment, the square support module 4 is arranged on the operating table. In the step of sleeving the annular single-frame matrix 3 on the square support module 4, the annular single-frame matrix 3 is placed on the operating table, and a support member 6 is arranged between the operating table and the annular single-frame matrix 3. The support member 6 is in contact with the inner wall of the annular single-frame matrix 3 to support the annular single-frame matrix 3. The support member 6 can support the annular single-frame matrix 3 to prevent the strip 1 on the annular single-frame matrix 3 from loosening and deforming. In the step of sleeving the annular single-frame matrix 3 on the square support module 4, the support member 6 is hung on the annular single-frame matrix 3, and when the annular single-frame matrix 3 is placed on the operating table, the support member 6 is located between the operating table and the annular single-frame matrix 3.

[0053] In one embodiment, in the step of sleeving the annular single-frame matrix 3 on the square support module 4, the operating table is in the vertical direction, and a mounting shaft is clamped between two module units 41. There is a mounting through hole 72 on the mandrel 7. The annular single-frame matrix 3 and the mandrel 7 are sleeved on the mounting shaft, and there is an interference fit between the mounting through hole 72 and the mounting shaft. Before the module unit 41 is separated for the first time, the wedge block of the mandrel is removed, and then the operating table is switched to the horizontal direction. The square support module 4 pushes the mandrel 7 out, and the mandrel 7 separates from the first inner support 2. At this time, the staff removes the mounting shaft and the mandrel 7 from the operating table.

[0054] In one embodiment, the single-frame iron core forming method further includes: wrapping a fixing band, a silicon steel strip, around the outermost layer of the strip 1, and the head and tail ends of the fixing band are connected to each other to form an outer hoop. The fixing band is a silicon steel strip. The two ends of the silicon steel strip are connected by argon arc spot welding. The strip 1 is wound around the first inner support 2. With the above structure, the silicon steel strip can seal the interface at the outermost layer of the strip 1, thus preventing the strip 1 from loosening.

[0055] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0056] The above embodiments only express several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A method for forming a single-frame iron core, characterized in that, The single-frame iron core forming method includes: Winding a strip (1) around a first inner support (2) to form an annular single-frame matrix (3), where the first inner support (2) is elliptical or quasi-elliptical in shape; Sleeving the annular single-frame matrix (3) onto a square-supporting module (4); Along the long axis direction of the first inner support (2), two module units (41) of the square-supporting module (4) are separated once to stretch the annular single-frame matrix (3) into a first rectangular single-frame matrix, and the length of the first rectangular single-frame matrix in the long axis direction of the first inner support (2) is greater than the length of the first rectangular single-frame matrix in the short axis direction of the first inner support (2); Among them, the step of stretching the annular single-frame matrix (3) into a first rectangular single-frame matrix by separating two module units (41) of the square-supporting module (4) once is specifically: An auxiliary mold (5) is sleeved between the annular single-frame matrix (3) and the square-supporting module (4), and two mold units (51) in the auxiliary mold (5) are respectively sleeved on the outer sides of the two module units (41), and the two mold units (51) move away from each other as the two module units (41) are separated once.

2. The single-frame iron core forming method according to claim 1, characterized in that The single-frame iron core forming method further includes: Along the long axis direction of the first inner support (2), the two module units (41) are separated a second time to stretch the first rectangular single-frame matrix into a second rectangular single-frame matrix.

3. The single-frame iron core forming method according to claim 2, characterized in that, Before the step of separating the two module units (41) a second time, the following steps are further included: A second inner support is inserted into the first rectangular single-frame matrix, and the second inner support is sleeved on the square-supporting module (4), and the second inner support is annular; In the step of separating the two module units (41) a second time, the two module units (41) stretch the second inner support when separated a second time, and the stretched second inner support and the second rectangular single-frame form a third rectangular single-frame.

4. The single-frame iron core forming method according to claim 1, wherein, The mold unit (51) includes a first side plate (511), a second side plate (512) and a third side plate (513), the first side plate (511) is perpendicular to the second side plate (512), the first side plate (511) and the third side plate (513) are both parallel to the long axis direction of the first inner support (2), the first side plate (511) and the third side plate (513) are respectively located on both sides of the second side plate (512), the second side plate is located on the side of the module unit (41) away from the other module unit, and the first side plate (511) and the third side plate (513) are respectively located on both sides of the module unit (41).

5. The single-frame iron core forming method according to claim 1, characterized in that The auxiliary mold (5) further includes a support plate (52) and two side plates (53), the two side plates (53) are arranged in parallel, and the two side plates (53) are respectively fixedly connected to both sides of the bottom of the support plate (52), and the two mold units (51) are respectively slidably connected to both ends of the bottom of the support plate (52); In the step of stretching the annular single-frame base body (3) into a first rectangular single-frame base body by separating two module units (41) of the square-supporting module (4) at one time, the side plates (53) are located on both sides of the two module units (41), and the supporting plate (52) overlaps on the annular single-frame base body (3).

6. The single-frame iron core forming method according to claim 1, characterized in that Before the step of passing a second inner support through the first rectangular single-frame base body and sleeving the second inner support on the square-supporting module, the following steps are further included: Dismantle the auxiliary mold (5) and place the second inner support between the module unit (41) and the first rectangular single-frame base body.

7. The single-frame iron core forming method according to claim 3, characterized in that The second inner support is a rectangular ring structure; in the step of passing a second inner support through the first rectangular single-frame base body and sleeving the second inner support on the square-supporting module, the two inner side walls of the second inner support in the long-axis direction of the first inner support (2) are in contact with the square-supporting module (4), the gap between the two outer side walls of the second inner support in the long-axis direction of the first inner support (2) and the inner wall of the first rectangular single-frame base body is less than 1.5 mm, the gap between the two inner side walls of the second inner support in the short-axis direction of the first inner support (2) and the module unit (41) is less than 1 mm, and the two outer side walls of the second inner support in the short-axis direction of the first inner support (2) are in contact with the first rectangular single-frame base body.

8. The single-frame iron core forming method according to claim 1, characterized in that, The module unit (41) includes a first section (411) and a second section (412) connected to each other. The circumferential structural dimension of the first section (411) is smaller than that of the second section (412), and the second section (412) is located below the first section (411); in the step of sleeving the auxiliary mold (5) between the annular single-frame base body (3) and the square-supporting module (4), the mold unit (51) is sleeved on the first section (411); in the step of passing a second inner support through the first rectangular single-frame base body and sleeving the second inner support on the square-supporting module, the second inner support is sleeved on the first section (411).

9. The single-frame iron core forming method according to claim 3, characterized in that The inner frames of the first rectangular single-frame base body, the second rectangular single-frame base body, and the third rectangular single-frame base body are rectangular structures, and there are transition arc surfaces between the adjacent two side walls of the first rectangular single-frame base body and the second rectangular single-frame base body.

10. The single-frame iron core forming method according to claim 1, characterized in that In the step of separating the two module units (41) at one time, the two module units (41) are separated by a first driving member; in the step of separating the two module units (41) for the second time, a second driving member is placed between the two module units (41), and the first driving member and the second driving member drive the two module units (41) to separate simultaneously.

11. The single-frame iron core forming method according to claim 1, wherein, In the step of winding the strip (1) around the first inner support (2) to form an annular single-frame base body (3), a mandrel (7) is sleeved inside the first inner support (2). The mandrel (7) is oval or quasi-oval and fits with the first inner support (2). In the step of sleeving the annular single-frame base body (3) on the square support module (4), the square support module (4) drives the mandrel (7) to separate from the first inner support (2).

12. The single-frame iron core forming method according to claim 1, characterized in that, The square support module (4) is arranged on the operating table. In the step of sleeving the annular single-frame base body (3) on the square support module (4), the annular single-frame base body (3) is placed on the operating table. A support member (6) is arranged between the operating table and the annular single-frame base body (3), and the support member fits with the annular single-frame base body (3) to support the annular single-frame base body (3).

13. The single-frame iron core forming method according to claim 1, characterized in that, The single-frame iron core forming method further includes: Wrapping a fixing band around the outermost layer of the strip (1), and connecting the head and tail ends of the fixing band to each other to form an outer hoop.

Images