Single-frame core forming method

Abstract

The application relates to a single-frame core forming method. The single-frame core forming method comprises the following steps: winding a material belt on a first inner support to form a ring-shaped single-frame base body, the first inner support being a circular ring; sleeving the ring-shaped single-frame base body on a support square module, and separating two module units of the support square module once to stretch the ring-shaped single-frame base body into a first rectangular single-frame base body along a first direction perpendicular to the axis of the first inner support; and separating the two module units twice to stretch the first rectangular single-frame base body into a second rectangular single-frame base body along the first direction. By adopting the technical scheme, the forming degree of the first rectangular single-frame base body and the second rectangular single-frame base body can be higher, and the driving force of a driving piece for driving the two module units to separate can be reduced.

Description

Technical Field

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

[0002] During the processing of a single-frame core, an amorphous alloy strip is typically wound around a circular inner support. A driver drives the support structure to stretch the strip and inner support into a rectangular single-frame core. In the aforementioned technical solution, the driver must apply significant force to the support structure to complete the stretching of the strip and inner support, placing high performance demands on the driver, which in turn increases the driver's cost. Furthermore, the thicker and stronger inner support makes it difficult to stretch the strip and inner support into the desired shape, resulting in a lower degree of formability in the single-frame core. Summary of the Invention

[0003] Based on this, it is necessary to provide a single-frame core forming method to address the problems that the existing single-frame core forming method has high performance requirements for the driving parts and poor forming degree of the wound core.

[0004] The present invention provides a single-frame iron core forming method, which includes the following steps: winding a material strip on a first inner support to form an annular single-frame base, wherein the first inner support is a circular ring; sleeve the annular single-frame base on a support square module, and separate the two module units of the support square module once along a first direction perpendicular to the axis of the first inner support to stretch the annular single-frame base into a first rectangular single-frame base; and separate the two module units a second time along the first direction to stretch the first rectangular single-frame base into a second rectangular single-frame base.

[0005] In one embodiment, the step of secondary separation of the two module units also includes the following steps: inserting a second inner support into the first rectangular single frame base, and sleeved on the supporting square module, the second inner support being annular; in the step of secondary separation of the two module units, the two module units are secondary separated and the second inner support is stretched, and the stretched second inner support and the second rectangular single frame form a third rectangular single frame.

[0006] In one embodiment, the two module units in the supporting module are separated at one time, and the steps of stretching the annular single-frame base into the first rectangular single-frame base are specifically as follows: an auxiliary mold is set between the annular single-frame base and the supporting module, and the two mold units in the auxiliary mold are respectively set 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 once.

[0007] In one embodiment, the mold unit includes a first side panel, a second side panel and a third side panel, the first side panel is perpendicular to the second side panel, the first side panel and the third side panel are arranged in parallel, the first side panel and the third side panel are respectively located on both sides of the second side panel, the second side panel is located on the side of the module unit away from the other module unit, and the first side panel and the third side panel are respectively located on both sides of the module unit.

[0008] In one embodiment, the auxiliary mold also includes a support plate and two side plates, the two side plates are arranged in parallel, and the two side plates are fixedly connected to the two sides of the bottom of the support plate, and the two mold units are slidably connected to the two ends of the bottom of the support plate; in the step of separating the two module units of the support module at one time to stretch the annular single frame base into a first rectangular single frame base, the side plates are located on both sides of the two module units, and the support plate is overlapped on the annular single frame base.

[0009] In one embodiment, before the step of inserting the second inner support into the first rectangular single frame base and sleeve-mounting the second inner support on the support square module, the following steps are also included: removing the auxiliary mold and placing the second inner support between the module unit and the first rectangular single frame base.

[0010] In one embodiment, the second inner support is a rectangular ring structure; in the step of inserting the second inner support into the first rectangular single-frame base and sleeved on the support square module, the two inner side walls of the second inner support in the first direction are in contact with the support square module, the gap between the two outer side walls of the second inner support in the first direction 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 perpendicular to the first direction and the module unit is less than 1 mm, and the two outer side walls of the second inner support perpendicular to the first direction are in contact with the first rectangular single-frame base.

[0011] In one embodiment, the module unit includes a first section and a second section that are connected, the circumferential structural dimension of the first section is smaller than the circumferential structural dimension of the second section, and the second section is located below the first section; in the step of sleeved auxiliary mold between the annular single frame base and the support square module, the mold unit is sleeved on the first section; in the step of inserting the second inner support into the first rectangular single frame base and sleeved the second inner support on the support square module, the second inner support is sleeved on the first section.

[0012] 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, and there is a transition arc surface between the adjacent side walls of the first rectangular single-frame base and the second rectangular single-frame base.

[0013] In one embodiment, in the first separation step of the two module units, the two module units are driven to separate by a first driving member; in the second 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.

[0014] In one embodiment, in the step of winding the material strip on the first inner support to form an annular single-frame base, a core mold is provided inside the first inner support, and the core mold is fitted with the first inner support; in the step of sleeved the annular single-frame base on the support square module, the support square module drives the core mold to separate from the first inner support.

[0015] In one embodiment, the supporting module is arranged on an operating table. In the step of sleeve-mounting the annular single-frame base on the supporting module, the annular single-frame base is placed on the operating table. A support member is provided between the operating table and the annular single-frame base. The support member is fitted with the annular single-frame base to support the annular single-frame base.

[0016] In one embodiment, the single-frame core forming method further includes: wrapping a fixing band around the outermost layer of the material strip, and connecting the head and tail ends of the fixing band to form an outer hoop.

[0017] In the present technical solution, a single-frame core forming method includes: winding a material strip on a first inner support to form an annular single-frame base; the annular single-frame base is sleeved on a support square module, and the module unit is separated once in a first direction perpendicular to the axis of the first inner support to stretch the annular single-frame base into a first rectangular single-frame base; the two module units are separated twice to stretch the first rectangular single-frame base into a second rectangular single-frame base. Using the above technical solution, the module unit is separated once and twice in the first direction to stretch the annular single-frame base into the first rectangular single-frame base and then into the second rectangular single-frame base. This can reduce the driving force for driving the module unit to separate, thereby reducing the performance requirements of the driving component used to drive the two module units to separate, thereby reducing the cost of the driving component, that is, reducing the overall cost of the production equipment; and after two stretchings, the annular single-frame base is stretched into the second rectangular single-frame base, which can make the second rectangular single-frame base more formable, thereby improving the performance of the single-frame core. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a single-frame iron core provided in an embodiment, wherein the single-frame iron core is sleeved on a supporting square module;

[0019] Figure 2 An exploded view of a single-frame core, support members, and support modules provided in one embodiment;

[0020] Figure 3 A schematic structural diagram of an auxiliary mold provided by an embodiment from a first perspective;

[0021] Figure 4 A schematic structural diagram of an auxiliary mold provided by an embodiment from a second perspective;

[0022] Figure 5 A schematic structural diagram of an auxiliary mold provided by an embodiment from a third perspective;

[0023] Figure 6 A flowchart of a single-frame core forming method provided in one embodiment.

[0024] Component number description:

[0025] 1. Material strip; 2. First inner support; 3. Annular single frame base; 4. Support module; 41. Module unit; 411. First section; 412. Second section; 5. Auxiliary mold; 51. Mold unit; 511. First side panel; 512. Second side panel; 513. Third side panel; 52. Support plate; 53. Side panel; 6. Support member. DETAILED DESCRIPTION

[0026] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0032] An embodiment of the present invention provides a method for forming a single-frame core. Figure 6 , the single frame core forming method includes the following steps:

[0033] The material strip 1 is wound on the first inner support 2 to form an annular single frame base 3. The first inner support 2 is annular (see Figure 1 );

[0034] The annular single frame base 3 is sleeved on the supporting module 4. Along the first direction perpendicular to the axis of the first inner support 2, the two module units 41 of the supporting module 4 are separated at once to stretch the annular single frame base 3 into a first rectangular single frame base.

[0035] Along the first direction, the two module units are separated a second time to stretch the first rectangular single-frame base into a second rectangular single-frame base.

[0036] In the above technical solution, the cross-section of the annular single-frame base 3 is semicircular, the outer sidewall of the annular single-frame base 3 is a conical surface, the inner sidewall of the annular single-frame base 3 is an arc-shaped, and the outer sidewall of the annular single-frame base 3 serves as an assembly surface. During the single-frame core forming process, the inner sidewall of the annular single-frame base 3 is set downward, and the inner sidewalls of the first rectangular single-frame base and the second rectangular single-frame base are both set downward. In this way, there is no need to flip the single-frame wound core when producing it, and there is no need to flip it when assembling multiple single-frame wound cores, which improves processing efficiency, avoids loosening and deformation of the material strip 1 caused by flipping the single-frame wound core, and reduces the scrap rate.

[0037] Optionally, the strip is made of an amorphous alloy, and the first inner support 2 and the second inner support are made of steel.

[0038] By adopting the above technical solution, the module unit 41 undergoes one separation and two separations along the first direction, and the annular single-frame base 3 is stretched into a first rectangular single-frame base and then stretched into a second rectangular single-frame base. In this way, the driving force for driving the module unit 41 to separate is reduced, thereby reducing the performance requirements of the driving component used to drive the two module units 41 to separate, and then reducing the cost of the driving component, that is, reducing the overall cost of the production equipment; and after two stretchings, the annular single-frame base is stretched into a second rectangular single-frame base, which can make the second rectangular single-frame base more formed, thereby improving the performance of the single-frame iron core.

[0039] In one embodiment, before the two modular units are separated for the second time, the following step is further included: inserting a second inner support within the first rectangular single frame base, the second inner support being sleeved onto the support module, the second inner support being annular. During the second separation step, the two modular units are separated for the second time and the second inner support is stretched. The stretched second inner support and the second rectangular single frame form a third rectangular single frame. With this technical solution, the stretched second inner support and the first inner support become part of the third rectangular single frame. This reduces the thickness of the first inner support, further lowering the driving force required to separate the modular units 41, thereby further reducing the performance requirements for the driver, and also improving the formability of the first rectangular single frame. Furthermore, to ensure that the structural dimensions of the third rectangular single frame meet requirements, the inner support thickness of the third rectangular single frame must meet a certain threshold. The combined structural strength of the first and second inner supports is less than the structural strength of an inner support having a thickness equal to the sum of the thicknesses of the first and second inner supports. Therefore, with this technical solution, the driving force required to separate the two modular units 41 for the second time can be reduced, further reducing the performance requirements for the driver.

[0040] In one embodiment, the steps for simultaneously separating the two modular units 41 in the support module 4 and stretching the annular single-frame base 3 into the first rectangular single-frame base are as follows: an auxiliary mold 5 is positioned between the annular single-frame base 3 and the support module 4, with the two mold units 51 in the auxiliary mold 5 being positioned outside the two modular units 41, respectively, and the two mold units 51 moving away from each other as the two modular units 41 are simultaneously separated. In the above technical solution, when the support module 4 is simultaneously separated, the mold units 51 are in contact with the inner sidewalls of the first rectangular single-frame base.

[0041] In one embodiment, before inserting the second inner support into the first rectangular single-frame base and fitting the second inner support onto the support module, the process further includes: removing the auxiliary mold 5 and placing the second inner support between the module unit 41 and the first rectangular single-frame base. After removing the auxiliary mold 5, a gap exists between the module unit 41 and the first rectangular single-frame base, facilitating the placement of the second inner support. In the aforementioned steps, before placing the second inner support between the module unit 41 and the first rectangular single-frame base, the two module units 41 must be slightly brought closer together along the first direction to facilitate installation of the second inner support.

[0042] See Figures 3 to 5 In one embodiment, the module unit 41 has a rectangular structure, and 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 and is arranged in parallel with the third side plate 513. The first side plate 511 and the third side plate 513 are respectively located on either side of the second side plate 512, and 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 once, 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 to prevent the module unit 41 and the mold unit 51 from shaking when the annular single-frame base 3 is stretched into the first rectangular single-frame base, thereby ensuring a high degree of forming of the first rectangular single-frame base.

[0043] See Figures 3 to 5In one embodiment, 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 fixedly connected to the two sides of the bottom of the support plate 52. The two mold units 51 are slidably connected to the two ends of the bottom of the support plate 52. During the step of separating the two modular units 41 at once to stretch the annular single-frame base 3 into the first rectangular single-frame base, the side plates 53 are located on both sides of the two modular units 41, and the support plate 52 overlaps the annular single-frame base 3. Optionally, the first side plate 511 and the third side plate 513 of the mold unit 51 are respectively flush with the two side plates 53. In this way, the inner side wall of the first rectangular single-frame base is in contact with the two side plates 53, thereby further improving the straightness of the first rectangular single-frame base. Since a gap is created between the two modular units 41 when they are separated, the above-described structure prevents the material strip 1 and first inner support 2 from bulging into the gap between the two modular units 41 when the annular single-frame base 3 is stretched into the first rectangular single-frame base, thereby improving the straightness of the first rectangular single-frame base. With the above-described structure, the support plate 52 is overlapped on the annular single-frame base 3, providing greater structural stability. This prevents the support plate 52 from shifting when the two modular units 41 are separated, which could affect the formability of the first rectangular single-frame base.

[0044] In one embodiment, the inner frames of the first and third rectangular single-frame bases are rectangular structures, and transitional curved surfaces are formed between adjacent side walls of the first and third rectangular single-frame bases. This allows the material strip 1 on the first and third rectangular single-frame bases to have transitional curved surfaces at the bends, thereby preventing deformation and fracture of the material strip 1.

[0045] Specifically, since the inner wall of the first rectangular single-frame base is in contact with the auxiliary mold 5, the inner wall of the third rectangular single-frame base is in contact with the support module 4. A transition arc is provided between the first side plate 511 and the second side plate 512 of the mold unit 51, and a transition arc is provided 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 3 into the first rectangular single-frame base, the connection between the inner side walls of the first rectangular single-frame base has a transition arc. The portion of the module unit 41 used to stretch the first rectangular single-frame base is a rectangular structure, and a transition arc is provided 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 into the third rectangular single-frame base, a transition arc is provided between the inner side walls of the first rectangular single-frame base.

[0046] In one 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 the second inner support, after being stretched, fits with the first rectangular single-frame base and the module unit 41. In the step of inserting the second inner support into the first rectangular single-frame base and sleeved on the support square module, the two inner side walls of the second inner support in the first direction fit with the support square module 4, and the gap between the two outer side walls of the second inner support in the first direction 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 perpendicular to the first direction and the module unit 41 is less than 1 mm, and the two outer side walls of the second inner support perpendicular to the first direction fit with the first rectangular single-frame base. Since the second inner support and the first rectangular single-frame base are stretched in the first direction when the two module units 41 are separated for the second time, the two inner side walls of the second inner support in the first direction are arranged to fit with the support module 4, so that after the second inner support is stretched by the support module 4, the second inner support has a better shape, that is, the shape of the third rectangular single-frame base is better. Since the position of the two side walls of the second inner support perpendicular to the first direction does not change when the second inner support is stretched, the two outer side walls of the second inner support perpendicular to the first direction are arranged to fit with the first rectangular single-frame base, so that in the third rectangular single-frame base, the stretched second inner support fits with the second rectangular single-frame base. In addition, the gap between the two outer side walls of the second inner support in the first direction and the inner wall of the first rectangular single-frame base is less than 1.5mm, and the gap between the two inner side walls of the second inner support perpendicular to the first direction and the module unit 41 is less than 1mm. This arrangement facilitates the installation of the second inner support between the support module 4 and the first rectangular single-frame base.

[0047] See Figure 2 In one embodiment, the module unit 41 includes a first section 411 and a second section 412 connected to each other. The circumferential structural dimensions of the first section 411 are smaller than those of the second section 412, and the second section 412 is located below the first section 411. In the step of sleeve-mounting the auxiliary mold 5 between the annular single-frame base 3 and the support module 4, the mold unit 51 is sleeved on the first section 411 and overlapped on the second section 412 to support the mold unit 51. In the step of inserting the second inner support into the first rectangular single-frame base and sleeve-mounting the second inner support on the support module, the second inner support is sleeved on the first section 411 and overlapped on the second section 412. The second section 412 is used to support the second inner support, so that the second inner support remains between the support module 4 and the first rectangular single-frame base and can maintain the second inner support at a specified position in the axial direction.

[0048] In one embodiment, during the primary separation step of the modular units 41, the first driver drives the two modular units 41 to separate. During the secondary separation step of the modular units 41, a second driver is placed between the two modular units 41, and the first and second drivers simultaneously drive the two modular units 41 to separate. Because the annular single-frame base 3 only has the first inner support 2 within it, during the primary separation step of the modular units 41, the first driver drives the modular units 41 to stretch the annular single-frame base 3 into the first rectangular single-frame base. This allows the primary separation of the modular units 41 to be driven with a relatively small driving force from the first driver. Since the secondary separation step of the modular units 41 stretches the second inner support and the first rectangular single-frame base, the above technical solution allows the secondary separation of the modular units 41 to be driven simultaneously by the first and second drivers. This allows the secondary separation of the modular units 41 to be driven with relatively small driving forces from both the first and second drivers. Therefore, the above technical solution can reduce the performance requirements for the first and second drivers, thereby reducing the overall cost of the production equipment. Optionally, the thickness of the second inner support can be greater than that of the first inner support 2. This reduces the strength of the first inner support 2, thereby reducing the driving force required to separate the two modular units 41 in one step, thereby lowering the performance requirements of the first driving member. Furthermore, although the second inner support is relatively strong, the first and second driving members simultaneously drive the secondary separation of the supporting module 4 and stretch the second inner support and the first rectangular single-frame base, further reducing the driving force requirements of the first and second driving members. Optionally, the first driving member is a hydraulic cylinder, and the second driving member is a hydraulic mine.

[0049] In one embodiment, during the step of winding the material strip 1 onto the first inner support 2 to form the annular single-frame base 3, a core mold is provided within the first inner support 2, and the core mold fits in place with the first inner support 2; during the step of placing the annular single-frame base 3 onto the support module 4, the support module 4 drives the core mold to separate from the first inner support 2. The provision of the core mold ensures that, during the step of winding the material strip 1 onto the first inner support 2 to form the annular single-frame base 3, the first inner support 2 does not deform when the material strip 1 is wound around the first inner support 2, thereby ensuring that the structural dimensions of the annular single-frame base 3 meet standards. The core mold is a circular structure, and a notch is provided on the sidewall of the core mold. When the core mold is inserted into the first inner support 2, a wedge is fixed in the notch to ensure that the core mold fits in place with the first inner support 2 and that the two are fixed. The shape of the wedge is the same as that of the notch.

[0050] See Figure 2In one embodiment, the support module 4 is disposed on an operating table. In the step of sleeve-mounting the annular single-frame base 3 on the support module 4, the annular single-frame base 3 is placed on the operating table. A support member 6 is disposed between the operating table and the annular single-frame base 3. The support member 6 fits against the annular single-frame base 3 to support the annular single-frame base 3. The support member 6 can support the annular single-frame base 3 and prevent the material strip 1 on the annular single-frame base 3 from loosening and deforming. In the step of sleeve-mounting the annular single-frame base 3 on the support module 4, the support member 6 is hung on the annular single-frame base 3, and when the annular single-frame base 3 is placed on the operating table, the support member 6 is located between the operating table and the annular single-frame base 3.

[0051] In one embodiment, during the step of sleeve-mounting the annular single-frame base 3 onto the support module 4, the operating table is vertically oriented, with a mounting shaft sandwiched between the two module units 41 and a through-hole provided on the core mold. The annular single-frame base 3 and the core mold are sleeved onto the mounting shaft, with a transition fit between the through-hole and the mounting shaft. Before the module units 41 are separated once, the wedges of the core mold are removed, and the operating table is then switched to a horizontal orientation. The support module 4 ejects the core mold, separating it from the first inner support 2. At this point, the operator removes the mounting shaft and core mold from the operating table.

[0052] In one embodiment, the single-frame core forming method further includes wrapping the outermost layer of the material strip 1 with a fixing band comprising a silicon steel band, with the ends of the fixing band being connected to form an outer hoop. The fixing band is a silicon steel band. The ends of the silicon steel band are spot welded using argon arc welding. The material strip 1 is wound around the first inner support 2. With this structure, the silicon steel band can seal the outermost interface of the material strip 1, thereby preventing the material strip 1 from loosening.

[0053] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A single frame core forming method, characterized in that: The single frame core forming method includes the following steps: The material strip (1) is wound on a first inner support (2) to form an annular single frame base (3), wherein the first inner support (2) is in the shape of a circular ring; The annular single-frame base (3) is sleeved on the supporting module (4), and along a first direction perpendicular to the axis of the first inner support (2), the two module units (41) of the supporting module (4) are separated at once to stretch the annular single-frame base (3) into a first rectangular single-frame base; Along the first direction, the two module units (41) are separated for a second time to stretch the first rectangular single-frame base into a second rectangular single-frame base; Wherein, before the step of secondary separation of the two module units (41), the step further includes: inserting a second inner support into the first rectangular single frame base, and sleeve-mounting the second inner support on the support square module (4), wherein the second inner support is annular; in the step of secondary separation of the two module units (41), the two module units (41) are secondary separated and the second inner support is stretched, and the stretched second inner support and the second rectangular single frame form a third rectangular single frame; The two module units (41) in the supporting module (4) are separated at one time, and the step of stretching the annular single-frame base (3) into a first rectangular single-frame base is specifically as follows: an auxiliary mold (5) is sleeved between the annular single-frame base (3) and the supporting module (4), and the two mold units (51) in the auxiliary mold (5) are respectively sleeved on the outside 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 at one time.

2. The single frame core forming method according to claim 1, characterized in that: The mold unit (51) includes a first side panel (511), a second side panel (512) and a third side panel (513), wherein the first side panel (511) is perpendicular to the second side panel (512), the first side panel (511) and the third side panel (513) are arranged in parallel, the first side panel (511) and the third side panel (513) are respectively located on both sides of the second side panel (512), the second side panel is located on a side of the module unit (41) away from the other module unit, and the first side panel (511) and the third side panel (513) are respectively located on both sides of the module unit (41).

3. The single frame core forming method according to claim 1, characterized in that: The auxiliary mold (5) further comprises 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 the two sides of the bottom of the support plate (52), and the two mold units (51) are respectively slidably connected to the two ends of the bottom of the support plate (52); In the step of separating the two module units (41) of the supporting module (4) at one time to stretch the annular single-frame base (3) into a first rectangular single-frame base, the side panels (53) are located on both sides of the two module units (41), and the support panels (52) are overlapped on the annular single-frame base (3).

4. The single frame core forming method according to claim 1, characterized in that: Before the step of inserting a second inner support into the first rectangular single frame base and sleeve-mounting the second inner support on the supporting square module, the method further includes: The auxiliary mold (5) is disassembled, and the second inner support is placed between the module unit (41) and the first rectangular single frame base.

5. The single frame core forming method according to claim 1, wherein: The second inner support is a rectangular ring structure; in the step of inserting the second inner support into the first rectangular single-frame base and sleeve-mounting the second inner support on the support square module, the two inner side walls of the second inner support in the first direction are in contact with the support square module (4), the gap between the two outer side walls of the second inner support in the first direction 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 perpendicular to the first direction and the module unit (41) is less than 1 mm, and the two outer side walls of the second inner support perpendicular to the first direction are in contact with the first rectangular single-frame base.

6. The single frame 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 the circumferential structural dimension of the second section (412), and the second section (412) is located below the first section (411); in the step of sleeve-mounting the auxiliary mold (5) between the annular single-frame base (3) and the support module (4), the mold unit (51) is sleeved on the first section (411); in the step of inserting a second inner support into the first rectangular single-frame base and sleeve-mounting the second inner support on the support module, the second inner support is sleeved on the first section (411).

7. The single frame core forming method according to claim 1, wherein: 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, and transition arc surfaces are provided between adjacent side walls of the first rectangular single-frame base and the second rectangular single-frame base.

8. The single frame core forming method according to claim 1, wherein: In a first separation step of the two module units (41), the two module units (41) are driven to separate by a first driving member; in a second separation step of the two module units (41), a second driving member is placed between the two module units (41), and the first driving member and the second driving member simultaneously drive the two module units (41) to separate.

9. The single frame core forming method according to claim 1, characterized in that: In the step of winding the material strip (1) on the first inner support (2) to form an annular single-frame base (3), a core mold is provided inside the first inner support (2), and the core mold is in contact with the first inner support (2); in the step of sleeve-mounting the annular single-frame base (3) on the support module (4), the support module (4) drives the core mold to separate from the first inner support (2).

10. The single frame core forming method according to claim 1, wherein: The supporting module (4) is arranged on an operating table. In the step of sleeve-mounting the annular single-frame base (3) on the supporting module (4), the annular single-frame base (3) is placed on the operating table. A supporting member (6) is provided between the operating table and the annular single-frame base (3). The supporting member (6) is fitted with the annular single-frame base (3) to support the annular single-frame base (3).

11. The single frame core forming method according to claim 1, wherein: The single frame core forming method further comprises: A fixing belt is wrapped around the outermost layer of the material belt (1), and the head and tail ends of the fixing belt are connected to each other to form an outer hoop.

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