Reverse bending winding method and mechanism for coil winding wire and winding equipment

Abstract

The invention discloses a method for reversely bending and winding a wire in coil winding. The method comprises the following steps: firstly, arranging a guide wheel which is parallel to a coil mold and is positioned on one side of a wire inlet direction of the coil mold; the wire is wound around the guide wheel to form a bending radian opposite to the outer curved surface of the coil mold, and then the wire is introduced into the coil mold; and then the wire is wound on the coil mold after passing through the guide wheel through rotation of the coil mold. According to the reverse bending winding method for the wire for coil winding, the coil is wound more compactly, more uniform stress distribution can be achieved in the wire, damage caused by stress concentration is reduced, the rebound phenomenon after winding is reduced, the radial size of the coil is effectively controlled, and the quality and performance of the coil are improved. The invention further provides a coil winding wire follow-up reverse bending mechanism and winding equipment.

Description

Technical Field

[0001] The invention specifically relates to a reverse bending winding method, mechanism and winding equipment for a coil-wound conductor. Background Art

[0002] In the manufacturing process of transformers, the coil winding process is crucial. The tension of the wire is often kept constant during winding, and the degree of fit between the wire and the coil is easily affected by the shape of the coil. In order to ensure that the radial dimensions of the coil meet the requirements for main insulation and longitudinal insulation, it is usually necessary to press and shape it after the winding is completed and demolded, and then perform subsequent processing to complete the product. However, at present, the wire is often not completely compliant after the winding is completed and demolded. This situation may not only cause the shape of the coil to deform and the structure to be not tight enough, but may also affect the mechanical stability of the final coil and cause certain safety risks. Summary of the invention

[0003] The inventor of the present invention has found that after the wire is wound on the coil mold and the external winding force is removed, it is easy to rebound (i.e. bend in the opposite direction relative to the outer surface of the coil mold) to release stress, which is the main reason for the wire not fitting well. In the traditional oblong transformer coil winding method, due to the different bending degrees of the wire on the long axis and short axis during the winding process, the mechanical strength of the coil may be uneven, and the residual stress in the long axis part with a larger bending degree is relatively high. When the external winding force is removed, the wire will rebound more significantly to release stress, which ultimately leads to the above defects.

[0004] The technical problem to be solved by the present invention is to provide a reverse bending winding method for a coil winding conductor in view of the above-mentioned deficiencies in the prior art, which makes the coil winding more compact, helps to achieve a more uniform stress distribution inside the conductor, reduces damage caused by stress concentration, and helps to reduce the rebound phenomenon after winding, effectively controls the radial size of the coil and improves the quality and performance of the coil. The present invention also provides a coil winding conductor follow-up reverse bending mechanism and winding equipment.

[0005] The present invention provides a method for reverse bending a coil winding conductor, the method comprising the following steps:

[0006] A guide wheel is provided which is parallel to the axial direction of the coil mold and is located on one side of the wire entry direction of the coil mold;

[0007] The wire is passed around the guide wheel, so that the wire forms a curvature opposite to the outer surface of the coil mold, and then introduced into the coil mold;

[0008] The coil mold rotates to allow the conductor to pass through the guide wheel and then be wound on the coil mold.

[0009] Furthermore, the guide wheel arranged parallel to the axial direction of the coil mold and located on one side of the wire entry direction of the coil mold specifically includes:

[0010] The guide wheel is arranged above the coil mold and there is a gap between the guide wheel and the coil mold in a horizontal direction perpendicular to the axial direction;

[0011] The method of allowing the wire to pass through the guide wheel and then be wound on the coil mold by rotating the coil mold specifically includes:

[0012] According to the set corresponding relationship, the guide wheel is raised and lowered with the rotation of the coil mold, so that:

[0013] When the guide wheel is at the upper limit of the travel, the wire tangent to the guide wheel reaches the coil mold and is wound around the long axis vertex M of the coil mold;

[0014] When the guide wheel is at the lower limit of the stroke, the wire tangent to the guide wheel reaches the coil mold and is wound around the short axis vertex N of the coil mold.

[0015] Furthermore, before the guide wheel is raised and lowered along with the rotation of the coil mold according to the set corresponding relationship, the method further includes: acquiring the set corresponding relationship; the acquiring the set corresponding relationship specifically includes:

[0016] Get the relationship between the real-time high point coordinate value y of the coil mold and the time t;

[0017] According to the relationship between the real-time high point coordinate value y and time t and the distance L of the wire between the guide wheel and the coil mold, the delay time required for the wire tangent to the guide wheel to reach the coil mold is obtained;

[0018] The setting correspondence between the guide wheel stroke position and the coil mold rotation position is determined according to the delay time.

[0019] Further, the delay time required for the wire tangent to the guide wheel to reach the coil mold is obtained according to the relationship between the real-time high point coordinate value y and time t and the distance L of the wire between the guide wheel and the coil mold, specifically including:

[0020] According to the relationship between the real-time high point coordinate value y and time t, the coil mold linear velocity v is obtained by v=wy, where w is the rotation angular velocity of the coil mold;

[0021] Depend on Obtain the delay time t1 required for the wire tangent to the guide wheel at the upper limit of the stroke to reach the end point M of the long axis of the coil mold;

[0022] Depend on Obtain the delay time t2 required for the wire tangent to the guide wheel at the lower limit of the stroke to reach the end point N of the short axis of the coil mold; where T is the time for the coil mold to rotate one circle;

[0023] The setting correspondence between the guide wheel stroke position and the coil mold rotation position is determined according to the delay time, specifically including:

[0024] At time t1 before the coil mold rotates to the horizontal position of the short axis, the guide wheel is at the upper limit of the stroke;

[0025] At time t2 before the coil mold rotates to the horizontal position of the long axis, the guide wheel is at the lower limit of the stroke;

[0026] Taking the time T for the coil mold to rotate one circle as a cycle, the travel time of the guide wheel from the lower limit to the upper limit is The travel time of the guide wheel from the upper limit to the lower limit is

[0027] Further, the obtaining of the relationship between the real-time high point coordinate value y of the coil mold and the time t specifically includes obtaining the relationship between the real-time high point coordinate value y of the coil mold and the time t according to the following calculation formula:

[0028]

[0029] in, is the eccentricity, a is the distance from the center of the coil mold to the long axis vertex M, b is the distance from the center of the coil mold to the short axis vertex N; and the maximum value of the real-time high point coordinate value y max =a, the minimum value of the real-time high point coordinate value y min =b.

[0030] The present invention also provides a coil winding conductor follow-up reverse bending mechanism, comprising a guide wheel, wherein the guide wheel is axially arranged parallel to the axial direction of the coil mold and is located on one side of the wire entry direction of the coil mold, and the guide wheel supports the wire wound toward the coil mold so that the wire forms a bending arc in the opposite direction to the outer curved surface of the coil mold before being wound on the coil mold.

[0031] Furthermore, the guide wheel is arranged above the coil mold and has a horizontal spacing perpendicular to the axial direction with the coil mold. The wire is wound from the side of the guide wheel away from the coil mold to the bottom of the guide wheel and then from the top of the coil mold to the side of the coil mold away from the guide wheel.

[0032] Furthermore, the coil winding wire follower reverse bending mechanism also includes an adjusting component, which is connected to the guide wheel and can drive the guide wheel to rise and fall to move relative to the coil mold, thereby adjusting the degree of bending that can be achieved by the wire after being supported by the guide wheel.

[0033] Furthermore, the coil winding conductor follow-up reverse bending mechanism also includes a control unit, which is electrically connected to the adjustment component, and is used to control the adjustment component to drive the lifting stroke of the guide wheel and the rotation stroke of the coil mold to adapt according to the set corresponding relationship, so that: when the guide wheel is at the upper limit of the stroke, the wire tangent to the guide wheel reaches the coil mold and is wound around the long axis vertex M of the coil mold; when the guide wheel is at the lower limit of the stroke, the wire tangent to the guide wheel reaches the coil mold and is wound around the short axis vertex N of the coil mold.

[0034] Furthermore, the setting correspondence relationship includes: the guide wheel is at the upper limit of the stroke at time t1 before the coil mold rotates to the horizontal position of the short axis; the guide wheel is at the lower limit of the stroke at time t2 before the coil mold rotates to the horizontal position of the long axis; taking the time T of one rotation of the coil mold as a cycle, the travel time of the guide wheel from the lower limit of the stroke to the upper limit of the stroke is The travel time of the guide wheel from the upper limit to the lower limit is

[0035] Among them, t1 is the delay time required for the wire tangent to the guide wheel at the upper limit of the stroke to reach the end point M of the long axis of the coil mold, and t2 is the delay time required for the wire tangent to the guide wheel at the lower limit of the stroke to reach the end point N of the short axis of the coil mold, which are respectively as well as get;

[0036] L is the distance between the guide wheel and the coil mold; v is the linear velocity of the coil mold, which is obtained based on the relationship between the real-time high point coordinate value y and the change with time t and v=wy, and w is the rotation angular velocity of the coil mold.

[0037] Furthermore, the relationship between the real-time high point coordinate value y of the coil mold and the time t is obtained by the following calculation formula:

[0038]

[0039] in, is the eccentricity, a is the distance from the center of the coil mold to the long axis vertex M, b is the distance from the center of the coil mold to the short axis vertex N; and the maximum value of the real-time high point coordinate value y max =a, the minimum value of the real-time high point coordinate value y min =b.

[0040] Further, the adjustment assembly includes a first mounting plate, a second mounting plate and a driving member, the first mounting plate is movably connected to the second mounting plate in a vertical direction, a vertically arranged rack is provided on the first mounting plate, the driving member is connected to the second mounting plate, a driving gear is provided at the driving end of the driving member, the driving gear is meshed and connected to the rack, and the guide wheel is rotatably connected to the first mounting plate so that under the drive of the driving member, the driving gear and the rack are meshed and driven to rise and fall with the first mounting plate.

[0041] Furthermore, a limit block is provided on the first mounting plate, and two limit blocks are provided, which are respectively arranged at two ends of the meshing stroke of the driving gear corresponding to the lifting stroke of the guide wheel.

[0042] Furthermore, one end of the rotating shaft of the guide wheel is connected to a bearing seat arranged at the bottom of the first mounting plate through a bearing, and the other end is connected to a threaded handle through a thread, so as to block and fix the guide wheel through the threaded handle.

[0043] Furthermore, the adjustment component is installed on a wire arrangement frame where a wire arrangement mechanism in the winding device is located, and can move laterally along the axial direction relative to the coil mold together with the wire arrangement frame.

[0044] The present invention also provides a transformer coil winding device, comprising: a winding device, which is used to install a coil mold and wind the wire around the coil mold by rotating and winding, and a wire arranging device, which includes a wire arranging mechanism, a wire arranging frame and the above-mentioned coil winding wire following reverse bending mechanism, the wire arranging mechanism and the coil winding wire following reverse bending mechanism are both installed on the wire arranging frame, the wire arranging mechanism is used to supply the wire to the coil mold, and the coil winding wire following reverse bending mechanism is used to support the wire wound around the coil mold so that the wire forms a bending arc in the opposite direction to the outer surface of the coil mold before being wound on the coil mold.

[0045] The reverse bending winding method of the coil winding conductor of the present invention uses a guide wheel to support the conductor wound toward the coil mold, so that it forms a bending arc opposite to the outer surface of the coil mold and then is wound on the coil mold, which is equivalent to adding a pretreatment process for reverse bending of the conductor in front of the coil mold. By applying a reverse bend before the conductor is wound, plastic deformation is preset and prestress is applied to the conductor. Due to the existence of prestress, the conductor is less likely to return to its original shape after winding, but remains in a docile state, which helps to achieve a more uniform stress distribution inside the conductor and reduce damage caused by stress concentration. Since this setting method helps to reduce the rebound phenomenon after winding, the conductor is not only more compact when wound, but also can control the radial size of the coil and improve the quality and performance of the coil, thereby improving the mechanical stability and safety of the coil product. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1It is a schematic diagram of the arrangement position of the guide wheel 1 of the coil-wound conductor follow-up reverse bending mechanism in Embodiment 2 of the present invention;

[0047] Figure 2 It is a schematic structural diagram of a coil-wound conductor follow-up reverse bending mechanism in Embodiment 2 of the present invention;

[0048] Figure 3 is another structural schematic diagram of the coil-wound conductor follow-up reverse bending mechanism in Embodiment 2 of the present invention;

[0049] Figure 4 It is a schematic structural diagram of an adjustment component of a coil-wound conductor follow-up reverse bending mechanism in Embodiment 2 of the present invention;

[0050] Figure 5 It is a schematic diagram of the structure of the threaded handle of the coil-wound conductor follow-up reverse bending mechanism in Example 2 of the present invention.

[0051] In the figure: 1. guide wheel; 11. rotating shaft; 12. threaded handle; 13. compression spring; 14. wire groove; 2. adjustment assembly; 21. first mounting plate; 211. rack; 212. limit block; 213. bearing seat; 214. linear guide slider; 22. second mounting plate; 221. proximity switch; 222. zero position mounting plate; 23. driving part; 231. driving gear; 232. servo motor; 233. reducer; 3. wire arrangement mechanism; 4. coil mold; 5. wire; 6. wire arrangement rack. DETAILED DESCRIPTION

[0052] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0053] In the description of the present invention, it should be noted that the terms "upper", "lower" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0054] In the description of the present invention, the terms “first”, “second” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connect", "set", "install", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0056] Example 1

[0057] The reverse bending winding method of the coil winding conductor of this embodiment can adopt the mechanism in Embodiment 2, and the method specifically includes the following steps:

[0058] A guide wheel 1 is provided which is parallel to the axial direction of the coil mold 4 and is located on one side of the wire entry direction of the coil mold 4. Figure 1 As shown;

[0059] The conductor 5 is passed around the guide wheel 1, so that the conductor 5 forms a curvature opposite to the outer surface of the coil mold 4 and then introduced into the coil mold 4;

[0060] The coil mold 4 rotates so that the conductor 5 passes through the guide wheel 1 and is wound on the coil mold 4 .

[0061] The reverse bending winding method of the coil winding conductor of this embodiment uses a guide wheel 1 to support the conductor 5 wound toward the coil mold 4, so that it forms a bending arc opposite to the outer surface of the coil mold 4 and then is wound on the coil mold 4, which is equivalent to adding a pretreatment process for reverse bending of the conductor in front of the coil mold 4. By applying a reverse bend before the conductor is wound, plastic deformation is preset and prestress is applied to the conductor 5. Due to the existence of prestress, the conductor 5 is less likely to return to its original shape after winding, but remains in a docile state, which helps to achieve a more uniform stress distribution inside the conductor 5 and reduce damage caused by stress concentration. Since this setting method helps to reduce the rebound phenomenon after winding, the conductor 5 is not only more compact when wound, but also can control the radial size of the coil and improve the quality and performance of the coil, thereby improving the mechanical stability and safety of the coil product.

[0062] In this embodiment, a guide wheel 1 is provided which is parallel to the axial direction of the coil mold 4 and is located on one side of the wire entry direction of the coil mold 4, and specifically includes:

[0063] The guide wheel 1 is arranged above the coil mold 4, and there is a horizontal gap perpendicular to the axial direction between the guide wheel 1 and the coil mold 4; therefore, when the reverse bend is formed, the wire 5 is wound from the side of the guide wheel 1 away from the coil mold 4 to the bottom of the guide wheel 1, and then from the top of the coil mold 4 to the side of the coil mold 4 away from the guide wheel 1. Figure 1 As shown;

[0064] This layout is more reasonable, so that the wire 5 is wound downward from the top of the coil mold 4 on the coil mold 4, and the wire 5 is wound toward one side of the coil mold 4 and is located below and outside the guide wheel 1, so that the coil mold is fully exposed, which is convenient for personnel to observe and operate the wire arranged on the coil mold 4;

[0065] The coil mold 4 is rotated so that the conductor 5 passes through the guide wheel 1 and is wound on the coil mold 4, which specifically includes:

[0066] According to the set corresponding relationship, the guide wheel 1 is raised and lowered along with the rotation of the coil mold 4, so that:

[0067] When the guide wheel 1 is at the upper limit of the travel, the conductor 5 tangent to the guide wheel 1 reaches the coil mold 4 and is wound around the long axis vertex M of the coil mold 4;

[0068] When the guide wheel 1 is at the lower limit of the stroke, the conductor 5 tangent to the guide wheel 1 reaches the coil mold 4 and is wound around the short axis vertex N of the coil mold 4. Figure 1 shown.

[0069] Since the bending degree at the vertex N of the short axis of the coil mold 4 is relatively low, the reverse bending degree of the wire 5 here should be increased compared to the vertex M of the long axis, so as to change the bending state of the wire as much as possible (i.e., from the "reverse bend" at the guide wheel 1 to the "positive bend" on the coil mold 4), so that the wire can generate sufficient radial positive pressure when it is at the short axis. Through the above reasonable stroke planning scheme, when the wire 5 is wound on the coil mold 4 with an elliptical or oblong structure, the internal stress of the wire 5 can be guaranteed to be equal at all places. In this way, the wire 5 and the surface of the coil mold 4 are more conformable.

[0070] In this embodiment, before the guide wheel 1 is lifted and lowered along with the rotation of the coil mold 4 according to the set corresponding relationship, the process further includes: obtaining the set corresponding relationship; obtaining the set corresponding relationship specifically includes:

[0071] Obtain the relationship between the real-time high point coordinate value y of the coil mold 4 and the time t; the real-time high point is the tangent position between the wire 5 and the coil mold 4. In this embodiment, the highest point position of the coil mold 4 in the vertical direction is taken;

[0072] According to the relationship between the real-time high point coordinate value y and time t and the distance L of the wire 5 between the guide wheel 1 and the coil mold 4, the delay time required for the wire 5 tangent to the guide wheel 1 to reach the coil mold 4 is obtained;

[0073] The setting correspondence between the stroke position of the guide wheel 1 and the rotation position of the coil mold 4 is determined according to the delay time.

[0074] That is, the “obtaining and setting corresponding relationships” can be specifically understood as follows:

[0075] ① The reverse bending angle required for the wire wound on the long axis side of the coil mold 4 is the smallest, and the corresponding reverse bending guide wheel 1 position is the upper limit. As the coil mold 4 rotates, the winding position of the wire 5 rotates from the long axis side to the short axis side. In order to increase the prestress applied to the wire 5, the reverse bending angle of the wire 5 gradually increases, and the corresponding reverse bending guide wheel 1 position gradually moves downward. The wire 5 wound on the short axis side corresponds to the reverse bending guide wheel 1 at the lower limit.

[0076] ② Since there is a distance between the reverse bending guide wheel 1 and the coil mold 4, in order to ensure that the wire 5 wound on the coil mold 4 is bent at an appropriate angle, the guide wheel 1 needs to move up and down (compared to the coil mold 4) in advance. The advance phase is the angle of rotation of the coil mold 4 from the winding starting point of the wire 5 on the coil mold 4 to the wire 5 after winding the distance (that is, the distance L of the wire 5 between the guide wheel 1 and the coil mold 4 ( Figure 1 The angle at which the wire 5 is wound around the coil mold 4 corresponds to the advance phase of the guide wheel 1).

[0077] ③ During winding, the coil mold 4 rotates at a constant speed (angular velocity), and a phase diagram of the highest point (real-time high point) in the vertical direction of the coil within a winding cycle (the coil rotates 360°) can be drawn. The real-time speed or lifting position of the reverse bending guide wheel 1 can be determined according to the real-time change of the linear speed of the conductor 5 during winding.

[0078] In this embodiment, the shape of the coil mold 4 is approximately regarded as an ellipse, the distance L between the guide wheel 1 and the coil mold 4 (the details of this distance are described above) is regarded as a constant, the angular velocity of the coil mold 4 is kept constant during rotation, and the contact position between the conductor 5 and the coil mold 4 is set to the vertical highest point of the coil mold 4 at that moment.

[0079] The upper and lower limits of the lifting stroke of the guide wheel 1 are determined by the mechanical structure installation. The horizontal distance between the guide wheel 1 and the coil mold 4 in the perpendicular direction to the axial direction varies according to the size of the coil, and is specifically selected according to the layout and production conditions.

[0080] After the upper and lower limits of the movement of the guide wheel 1 are specified, the position of the guide wheel 1 rising and falling along with the rotation position of the coil mold 4 is determined in the following manner: when the guide wheel 1 is at the upper limit of the travel, the wire 5 tangent to the guide wheel 1 reaches the coil mold 4 and is wound around the long axis vertex M of the coil mold 4;

[0081] When the guide wheel 1 is at the lower limit of the stroke, the conductor 5 tangent to the guide wheel 1 reaches the coil mold 4 and is wound around the short axis vertex N of the coil mold 4 .

[0082] In order to achieve the above travel mode, ① the change of the real-time high point coordinate value of the coil mold 4 within one rotation cycle (change of the coil high point coordinate value) needs to be proportionally mapped to the movement of the guide wheel 1 within the upper and lower limits; ② In addition, the "delay distance" between the guide wheel 1 and the coil mold 4 needs to be considered. Since this distance is set to a constant value, the "delay time" of this distance changes with the change of the linear speed of the elliptical coil.

[0083] Based on this, the change of the coordinate value of the coil high point can be obtained by establishing a polar coordinate system, taking the center of the coil mold 4 as the origin, moving the y-axis counterclockwise, and its intersection with the ellipse is the coil high point at that moment, and we can get:

[0084]

[0085] θ=-wt

[0086] in, is the eccentricity, a is the distance from the center of the coil mold 4 to the long axis vertex M, b is the distance from the center of the coil mold 4 to the short axis vertex N, and w is the rotation angular velocity of the coil mold 4;

[0087] Therefore, according to the above content, the relationship between the real-time high point coordinate value y of the coil mold 4 and the time t is obtained, specifically including obtaining the relationship between the real-time high point coordinate value y of the coil mold 4 and the time t according to the following calculation formula:

[0088]

[0089] And the maximum value of the real-time high point coordinate value y max =a, the minimum value of the real-time high point coordinate value y min = b;

[0090] According to the relationship between the real-time high point coordinate value y and time t, and the distance L of the wire 5 between the guide wheel 1 and the coil mold 4, the delay time required for the wire 5 tangent to the guide wheel 1 to reach the coil mold 4 is obtained, specifically including:

[0091] According to the relationship between the real-time high point coordinate value y and time t, the linear velocity v (real-time linear velocity, elliptical trajectory linear velocity) of the coil mold 4 is obtained by v=wy;

[0092] Depend on Obtain the delay time t1 required for the conductor 5 tangent to the guide wheel 1 at the upper limit of the stroke to reach the end point M of the long axis of the coil mold 4;

[0093] Depend on Obtain the delay time t2 required for the conductor 5 tangent to the guide wheel 1 at the lower limit of the stroke to reach the end point N of the short axis of the coil mold 4; wherein T is the time for the coil mold 4 to make one rotation;

[0094] Then, the setting correspondence between the travel position of the guide wheel 1 and the rotation position of the coil mold 4 is determined according to the delay time, specifically including:

[0095] At time t1 before the coil mold 4 rotates to the horizontal position of the short axis, the guide wheel 1 is at the upper limit of the travel;

[0096] At time t2 before the coil mold 4 rotates to the horizontal position of the long axis, the guide wheel 1 is at the lower limit of the stroke;

[0097] The time T for the coil mold 4 to rotate one circle is regarded as a cycle. In one cycle, the guide wheel 1 has two up and down strokes. The travel time of the guide wheel 1 from the lower limit to the upper limit is The travel time of guide wheel 1 from the upper limit to the lower limit is The intermediate process can be proportionally mapped according to the real-time high point coordinate value of the coil mold 4.

[0098] In this embodiment, since the guide wheel 1 is arranged above and beside the coil mold 4, the tangent point between the section of the wire 5 located between the extension point of the guide wheel 1 and the contact point of the coil mold 4 and the coil mold 4 is near the highest point in the vertical direction of the coil mold 4. Therefore, this embodiment assumes that the extension point of the guide wheel 1 on the wire arrangement mechanism and the tangent point of contact with the coil mold 4 are the highest points in the vertical direction of the coil mold 4, and based on this, the required reverse bending degree of the wire 5 is determined according to the size of the wound coil and the specification of the wire 5, that is, the upper and lower limits of the movement range of the reverse bending guide wheel 1. Through this method and step of follow-up adjustment of reverse bending, the coil wire produced can be wound tightly, the internal stress is balanced and stable, the mechanical strength is high, and the product quality is better.

[0099] Example 2

[0100] like Figure 1 As shown, the coil winding conductor follow-up reverse bending mechanism of this embodiment can be used to implement the method in Example 1. The mechanism specifically includes a guide wheel 1, which is axially arranged parallel to the axial direction of the coil mold 4 and is located on one side of the wire entry direction of the coil mold 4. The guide wheel 1 supports the conductor 5 wound around the coil mold 4 so that the conductor 5 forms a bending arc in the opposite direction to the outer surface of the coil mold 4 and is then wound on the coil mold 4, that is, the two bending sections formed when the conductor 5 passes through the guide wheel and the coil mold are in an S-shaped structure.

[0101] The coil winding wire follow-up reverse bending mechanism of this embodiment uses a guide wheel 1 to support the wire 5 wound toward the coil mold 4, so that it forms a bending arc opposite to the outer surface of the coil mold 4 and then is wound on the coil mold 4, which is equivalent to adding a pretreatment process for the reverse bending of the wire 5 in front of the coil mold 4. By applying a reverse bend before the wire 5 is wound, plastic deformation is preset and prestress is applied to the wire 5 (this prestress is exactly opposite to the internal stress generated after winding on the coil mold 4). Due to the existence of prestress, the wire is less likely to return to its original shape after winding, but remains in a docile state, which helps to achieve a more uniform stress distribution inside the wire and reduce damage caused by stress concentration. Since this setting method helps to reduce the rebound phenomenon after winding, the wire is not only more compact when wound, but also can control the radial size of the coil and improve the quality and performance of the coil, thereby improving the mechanical stability and safety of the coil product.

[0102] In this embodiment, the guide wheel 1 is arranged above the coil mold 4, and there is a gap between the guide wheel 1 and the coil mold 4 in the horizontal direction perpendicular to the axial direction. The wire 5 is wound from the side of the guide wheel 1 away from the coil mold 4 to the bottom of the guide wheel 1, and then wound from the top of the coil mold 4 to the side of the coil mold 4 away from the guide wheel 1. This layout is more reasonable, so that the wire 5 is wound on the coil mold 4 from the top of the coil mold 4 downward, and the side of the wire 5 wound to the coil mold 4 is below and outside the guide wheel 1, which fully exposes the coil mold, making it convenient for personnel to observe and operate the wires arranged on the coil mold 4.

[0103] In this embodiment, Figures 2 to 4 As shown, a wire groove 14 is provided on the guide wheel 1 for limiting the position of the wire 5 to prevent the wire 5 from sliding laterally and falling off.

[0104] In this embodiment, the coil winding wire follower reverse bending mechanism also includes an adjustment component 2, which is connected to the guide wheel 1 and can drive the guide wheel 1 to rise and fall to move relative to the coil mold 4, thereby adjusting the degree of bending that the wire 5 can achieve after being supported by the guide wheel 1. Since the degree of bending of the wire 5 can be adjusted, it is equivalent to that the prestress applied to the wire 5 by the guide wheel 1 can be adjusted. Therefore, when this embodiment is used for structures with inconsistent circumferential bending degrees of the outer surface such as the oblong coil mold 4 and the elliptical coil mold 4, it can adapt to the outer surface areas with different bending degrees through this adjustment, thereby achieving the beneficial effect of equal and balanced internal stress when the wire 5 is wound, and further optimizing the role played by this mechanism.

[0105] In this embodiment, the upper and lower limits of the lifting stroke of the guide wheel 1 are determined by the mechanical structure installation, and the horizontal distance between the guide wheel 1 and the coil mold 4 in the perpendicular direction to the axial direction varies according to the size of the coil, and is specifically selected according to the layout and production conditions.

[0106] In this embodiment, the coil winding conductor follow-up reverse bending mechanism also includes a control unit, which is electrically connected to the adjustment component, and is used to control the adjustment component 2 to drive the lifting stroke of the guide wheel 1 to match the rotation stroke of the coil mold 4 according to the set corresponding relationship, so that: when the guide wheel 1 is at the upper limit of the stroke, the wire 5 tangent to the guide wheel 1 reaches the coil mold 4 and is wound around the long axis vertex M of the coil mold 4; when the guide wheel 1 is at the lower limit of the stroke, the wire 5 tangent to the guide wheel 1 reaches the coil mold 4 and is wound around the short axis vertex N of the coil mold 4.

[0107] Since the bending degree at the vertex N of the short axis of the coil mold 4 is relatively low, the reverse bending degree of the wire 5 here should be increased compared to the vertex M of the long axis, so as to change the bending state of the wire as much as possible (i.e., from the "reverse bend" at the guide wheel 1 to the "positive bend" on the coil mold 4), so that the wire can generate sufficient radial positive pressure when it is at the short axis. Through the above reasonable stroke planning scheme, when the wire 5 is wound on the coil mold 4 with an elliptical or oblong structure, the internal stress of the wire 5 can be guaranteed to be equal at all places. In this way, the wire 5 and the surface of the coil mold 4 are more conformable.

[0108] Specifically, the above-mentioned setting correspondence relationship includes:

[0109] At time t1 before the coil mold 4 rotates to the horizontal position of the short axis, the guide wheel 1 is at the upper limit of the travel;

[0110] At time t2 before the coil mold 4 rotates to the horizontal position of the long axis, the guide wheel 1 is at the lower limit of the stroke;

[0111] Taking the time T for the coil mold 4 to rotate one circle as a cycle, the travel time of the guide wheel 1 from the lower limit to the upper limit is The travel time of guide wheel 1 from the upper limit to the lower limit is

[0112] Among them, t1 is the delay time required for the wire 5 tangent to the guide wheel 1 at the upper limit of the stroke to reach the end point M of the long axis of the coil mold 4, and t2 is the delay time required for the wire 5 tangent to the guide wheel 1 at the lower limit of the stroke to reach the end point N of the short axis of the coil mold 4, which are respectively as well as get;

[0113] L is the distance between the guide wheel 1 and the coil mold 4 of the conductor 5; v is the linear velocity of the coil mold 4, which is obtained according to the relationship between the real-time high point coordinate value y and the change with time t and v=wy, and w is the rotation angular velocity of the coil mold 4.

[0114] In this embodiment, the relationship between the real-time high point coordinate value y of the coil mold 4 and the time t is obtained by the following calculation formula:

[0115]

[0116] in, is the eccentricity, a is the distance from the center of the coil mold 4 to the long axis vertex M, b is the distance from the center of the coil mold 4 to the short axis vertex N; and the maximum value of the real-time high point coordinate value y max =a, the minimum value of the real-time high point coordinate value y min =b.

[0117] The specific derivation process of the setting correspondence relationship can be obtained according to the content in Example 1. Through the method steps of the follow-up adjustment of the reverse bending, the coil wire produced can be wound tightly, the internal stress is balanced and stable, the mechanical strength is high, and the product quality is better.

[0118] In this embodiment, the adjustment component 2 includes a first mounting plate 21 (also called a guide rail mounting plate), a second mounting plate 22 (also called a guide wheel mounting plate) and a driving member 23. The first mounting plate 21 is movably connected to the second mounting plate 22 in the vertical direction. Specifically, a sliding pair such as a linear guide rail slider 214 can be used to realize a relative movable connection in the vertical direction. A vertically arranged rack 211 is provided on the first mounting plate 21. The driving member 23 is connected to the second mounting plate 22. A driving gear 231 is provided at the driving end of the driving member 23. The driving gear 231 is meshed and connected to the rack 211. The guide wheel 1 is rotatably connected to the first mounting plate 21, so that under the drive of the driving member 23, the driving gear 231 and the rack 211 are meshed and driven, and the guide wheel 1 rises and falls with the first mounting plate 21.

[0119] The driving member 23 includes a servo motor 232 and a reducer 233 . The output shaft of the servo motor 232 is connected to the input shaft of the reducer 233 , and the input shaft of the reducer 233 is connected to the driving gear 231 .

[0120] In this embodiment, the first mounting plate 21 is further provided with a limit block 212, and two limit blocks 212 are provided, which are respectively arranged at the two ends of the meshing stroke of the driving gear 231 corresponding to the lifting stroke of the guide wheel 1. Figure 4 As shown, when the guide wheel 1 is lifted to the end of the stroke, the driving gear 231 also moves relative to the rack 211 and reaches the limit block 212, so that the limit of the mechanical structure prevents the mechanism from being restricted when the control fails, thereby ensuring the safety of operation.

[0121] The second mounting plate 22 is provided with a proximity switch 221 and a zero position mounting plate 222. Specifically, Figure 2As shown, a proximity switch 221 is provided at the upper and lower sides of the second mounting plate 22 corresponding to the position of the first mounting plate 21, which is used to sense the position of the guide wheel 1. As a sensor of the position of the guide wheel 1, an additional proximity switch 221 is provided below the second mounting plate 22, which is used as a zero position sensing component of the guide wheel 1, so that the upper and lower limits can be accurately positioned and measured. The two proximity switches 221 below are both installed on the zero position mounting plate 222. As part of the closed-loop control, the proximity switch functions as a sensor.

[0122] In this embodiment, Figure 5 As shown, one end of the rotating shaft 11 of the guide wheel 1 is connected to the bearing seat 213 provided at the bottom of the first mounting plate 21 through a bearing, and the other end is connected to the threaded handle 12 through a thread, so as to block and fix the guide wheel 1 through the threaded handle 12. A compression spring 13 can be arranged between the threaded handle 12 and the inner hole of the rotating shaft 11 to facilitate the disassembly and assembly of the threaded handle 12.

[0123] In this embodiment, the adjustment component 2 is installed on the wire arranging frame 6 where the wire arranging mechanism 3 is located in the winding equipment, and specifically, the second mounting plate 22 is connected to the wire arranging frame 6, and can move axially relative to the coil mold 4 together with the wire arranging frame 6. The wire arranging mechanism 3 is a mechanism for supplying the wire 5 to the coil mold 4. With the axial movement relative to the coil mold 4, the wire 5 is evenly wound and arranged. It is a structure that already exists on the existing winding equipment, so it will not be described in detail here.

[0124] In this embodiment, after the coil mold 4 is put on the machine, the wire 5 is fixed on the coil mold 4 after passing through the wire arrangement wheel (i.e., the wire arrangement mechanism 3) and the reverse bending guide wheel 1 from the rear spool. Taking the 6TBC.600.U90076.1 drawing as an example, according to the design of the drawing, the long axis of the high-voltage coil is 254mm and the short axis is 185mm, which can be approximately regarded as an ellipse. According to the size of the coil mold 4 after winding, the rotation radius of the copper bar and the position limit of the wire arrangement mechanism, the center position of the coil mold 4 is taken as the zero point, and the upper limit and lower limit corresponding to the required reverse bending angle of the wire from the long axis side to the short axis side are 450mm and 350mm respectively, and the horizontal distance between the center of the reverse bending guide wheel and this position is 400mm, so that the guide wheel 1 reversely bends the wire 5 before entering the coil mold 4.

[0125] Generally speaking, the coil winding wire follow-up reverse bending mechanism of this embodiment can be used in the field of transformer coil manufacturing technology, and can be installed on the wire rack 6 of the winding equipment. The mechanism includes a guide wheel 1 for reverse bending of the wire, which can move left and right with the wire rack 6. The guide wheel 1 is fixed to the guide rail mounting plate (i.e., the first mounting plate 21) by a rotating shaft 11. The wire 5 can extend from the wire roller above it (i.e., the wire arranging wheel, the wire arranging mechanism 3) and then be wound on the coil mold 4 through the lower surface of the guide wheel. The guide wheel 1 pre-bends the wire 5 wound on the coil to eliminate the imbalance of residual stress in the wire 5 on the long and short axis sides of the coil. The servo motor 232 fixed on the guide wheel mounting plate 21 is connected to the reducer 233, driving the driving gear 231 to make the guide wheel 1 move up and down when the coil rotates to different angles. Its upper and lower limits can be achieved by the action of proximity switches, control units, driving components or other auxiliary components (such as limit blocks). In other embodiments, other components that can complete this function can also be used, which will not be described in detail here.

[0126] This mechanism makes the coil of the oblong structure tighter during winding, reduces the rebound phenomenon after winding, applies prestress to the wire 5 to offset the elastic restoring force of the wire 5 due to bending, and makes the internal stress of the wire equal around the oblong coil. This makes the wire 5 more closely attached to the surface of the coil mold 4. At the same time, in view of the different bending degrees of the long and short axis coils of the oblong coil, in order to apply a greater radial force to the wire 5 on the short axis side of the coil mold 4, the reverse bending guide wheel 1 can achieve the upward and downward movement with the rotation position of the coil mold 4, ensuring that the wire with a larger reverse bending degree is wound on the short axis side of the coil mold 4 to balance the stress distribution around the coil.

[0127] It can be said that in order to improve the fit of the conductor 5 when it is wound on the coil mold 4 and eliminate the imbalance of internal stress of the conductor 5, the mechanism of this embodiment not only provides a reverse bending guide wheel 1, but also can apply different prestresses according to the different bending degrees of the major and minor axis sides of the oblong coil by adjusting the upper and lower positions. After the reverse bending, the tension and compression states of the upper and lower surfaces of the conductor are changed, and the existing tension control structure can be used to make the internal stress more uniform, which is helpful for the shaping of the coil mold 4.

[0128] Example 3

[0129] The transformer coil winding device of this embodiment includes:

[0130] The winding device is used to install the coil mold 4 and wind the wire 5 around the coil mold 4 by rotating and winding.

[0131] The wire arrangement device includes a wire arrangement mechanism 3, a wire arrangement frame 6, and the coil winding wire following reverse bending mechanism in Example 2. The wire arrangement mechanism 3 and the coil winding wire following reverse bending mechanism are both installed on the wire arrangement frame 6.

[0132] The wire arrangement mechanism 3 is used to supply the wire 5 to the coil mold 4.

[0133] The coil winding conductor follow-up reverse bending mechanism is used to support the conductor 5 wound around the coil mold 4, so that the conductor 5 forms a bending arc opposite to the outer surface of the coil mold 4 and is then wound on the coil mold 4.

[0134] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method for reverse bending a coil winding conductor, characterized in that: The method comprises the following steps: A guide wheel (1) is provided which is parallel to the axial direction of the coil mold (4) and is located on one side of the wire entry direction of the coil mold (4); The wire (5) is passed around the guide wheel (1), so that the wire (5) forms a curvature in the opposite direction to the outer surface of the coil mold (4), and then introduced into the coil mold (4); The coil mold (4) is rotated so that the conductor (5) passes through the guide wheel (1) and is then wound on the coil mold (4).

2. The method for reverse bending a coil winding conductor according to claim 1, characterized in that: The guide wheel (1) is arranged parallel to the axial direction of the coil mold (4) and is located on one side of the wire entry direction of the coil mold (4), and specifically comprises: The guide wheel (1) is arranged above the coil mold (4) and is spaced apart from the coil mold (4) in a horizontal direction perpendicular to the axial direction; The method of causing the wire (5) to pass through the guide wheel (1) and then be wound on the coil mold (4) by rotating the coil mold (4) specifically includes: According to the set corresponding relationship, the guide wheel (1) is raised and lowered along with the rotation of the coil mold (4), so that: When the guide wheel (1) is at the upper limit of the travel, the conductor (5) tangent to the guide wheel (1) reaches the coil mold (4) and is wound around the long axis vertex M of the coil mold (4); When the guide wheel (1) is at the lower limit of the stroke, the conductor (5) tangent to the guide wheel (1) reaches the coil mold (4) and is wound around the short axis vertex N of the coil mold (4).

3. The method for reverse bending a coil winding conductor according to claim 2, characterized in that: Before the guide wheel (1) is raised and lowered along with the rotation of the coil mold (4) according to the set corresponding relationship, the method further includes: acquiring the set corresponding relationship; The obtaining and setting corresponding relationship specifically includes: Obtain the relationship between the real-time high point coordinate value y of the coil mold (4) and the time t; According to the relationship between the real-time high point coordinate value y and time t and the distance L of the wire (5) between the guide wheel (1) and the coil mold (4), the delay time required for the wire (5) tangent to the guide wheel (1) to reach the coil mold (4) is obtained; The setting correspondence between the travel position of the guide wheel (1) and the rotation position of the coil mold (4) is determined according to the delay time.

4. The method for reverse bending a coil winding conductor according to claim 3, characterized in that: The method of obtaining the delay time required for the wire (5) at a position tangent to the guide wheel (1) to reach the coil mold (4) based on the relationship between the real-time high point coordinate value y and the time t and the distance L of the wire (5) between the guide wheel (1) and the coil mold (4) specifically includes: According to the relationship between the real-time high point coordinate value y and the time t, the linear velocity v of the coil mold (4) is obtained by v=wy, where w is the rotational angular velocity of the coil mold (4); Depend on Obtaining the delay time t1 required for the conductor (5) tangent to the guide wheel (1) at the upper limit of the stroke to reach the end point M of the long axis of the coil mold (4); Depend on The delay time t2 required for the conductor (5) tangent to the guide wheel (1) at the lower limit of the stroke to reach the end point N of the short axis of the coil mold (4); wherein T is the time for the coil mold (4) to rotate one circle; The step of determining the setting correspondence between the travel position of the guide wheel (1) and the rotation position of the coil mold (4) according to the delay time specifically includes: At time t1 before the coil mold (4) rotates to a position where the short axis is in a horizontal direction, the guide wheel (1) is at the upper limit of the travel; At time t2 before the coil mold (4) rotates to a position where the long axis is in a horizontal direction, the guide wheel (1) is at the lower limit of the stroke; Taking the time T for the coil mold (4) to rotate one circle as a cycle, the travel time of the guide wheel (1) from the lower limit position to the upper limit position is The travel time of the guide wheel (1) from the upper limit to the lower limit is 5. The method for reverse bending a coil winding conductor according to claim 4, characterized in that: The step of obtaining the relationship between the real-time high point coordinate value y of the coil mold (4) and the time t specifically includes obtaining the relationship between the real-time high point coordinate value y of the coil mold (4) and the time t according to the following calculation formula: in, is the eccentricity, a is the distance from the center of the coil mold (4) to the long axis vertex M, b is the distance from the center of the coil mold (4) to the short axis vertex N, and the maximum value of the real-time high point coordinate value y max =a, the minimum value of the real-time high point coordinate value y min =b.

6. A coil-wound conductor follow-up reverse bending mechanism, characterized in that: The guide wheel (1) is arranged axially parallel to the axial direction of the coil mold (4) and is located on one side of the coil mold (4) in the direction of wire entry. The guide wheel (1) supports the conductive wire (5) wound around the coil mold (4), so that the conductive wire (5) forms a curvature in the opposite direction to the outer curved surface of the coil mold (4) and is then wound on the coil mold (4).

7. The coil-wound conductor follow-up reverse bending mechanism according to claim 6, characterized in that: The guide wheel (1) is arranged above the coil mold (4) and is spaced apart from the coil mold (4) in a horizontal direction perpendicular to the axial direction. The conductor (5) is wound from the side of the guide wheel (1) away from the coil mold (4) to the bottom of the guide wheel (1) and then wound from the top of the coil mold (4) to the side of the coil mold (4) away from the guide wheel (1).

8. The coil-wound conductor follow-up reverse bending mechanism according to claim 7, characterized in that: Also includes an adjustment component (2), The adjustment component (2) is connected to the guide wheel (1) and can drive the guide wheel (1) to rise and fall so as to move relative to the coil mold (4), thereby adjusting the degree of bending that the wire (5) can achieve after being supported by the guide wheel (1).

9. The coil-wound conductor follow-up reverse bending mechanism according to claim 8, characterized in that: It also includes a control unit, which is electrically connected to the adjustment component and is used to control the adjustment component (2) to drive the lifting stroke of the guide wheel (1) to match the rotation stroke of the coil mold (4) according to a set corresponding relationship, so that: When the guide wheel (1) is at the upper limit of the travel, the conductor (5) tangent to the guide wheel (1) reaches the coil mold (4) and is wound around the long axis vertex M of the coil mold (4); When the guide wheel (1) is at the lower limit of the stroke, the conductor (5) tangent to the guide wheel (1) reaches the coil mold (4) and is wound around the short axis vertex N of the coil mold (4).

10. The coil-wound conductor follow-up reverse bending mechanism according to claim 9, characterized in that: The setting correspondence relationship includes: At time t1 before the coil mold (4) rotates to a position where the short axis is in a horizontal direction, the guide wheel (1) is at the upper limit of the travel; At time t2 before the coil mold (4) rotates to a position where the long axis is in a horizontal direction, the guide wheel (1) is at the lower limit of the stroke; Taking the time T for the coil mold (4) to rotate one circle as a cycle, the travel time of the guide wheel (1) from the lower limit position to the upper limit position is The travel time of the guide wheel (1) from the upper limit to the lower limit is Wherein, t1 is the delay time required for the conductor (5) tangent to the guide wheel (1) at the upper limit of the stroke to reach the end point M of the long axis of the coil mold (4), and t2 is the delay time required for the conductor (5) tangent to the guide wheel (1) at the lower limit of the stroke to reach the end point N of the short axis of the coil mold (4), which are respectively given by as well as get; L is the distance of the conductor (5) between the guide wheel (1) and the coil mold (4); v is the linear velocity of the coil mold (4), which is obtained based on the relationship between the real-time high point coordinate value y and the change with time t and v=wy, and w is the rotational angular velocity of the coil mold (4).

11. The coil-wound conductor follow-up reverse bending mechanism according to claim 10, characterized in that: The relationship between the real-time high point coordinate value y of the coil mold (4) and the time t is obtained by the following calculation formula: in, is the eccentricity, a is the distance from the center of the coil mold (4) to the long axis vertex M, b is the distance from the center of the coil mold (4) to the short axis vertex N; and the maximum value of the real-time high point coordinate value y max =a, the minimum value of the real-time high point coordinate value y min =b.

12. The coil-wound conductor follow-up reverse bending mechanism according to claim 8, characterized in that: The adjustment assembly (2) comprises a first mounting plate (21), a second mounting plate (22) and a driving member (23). The first mounting plate (21) is movably connected to the second mounting plate (22) in a vertical direction, and a vertically arranged rack (211) is provided on the first mounting plate (21). The driving member (23) is connected to the second mounting plate (22), and a driving gear (231) is provided at the driving end of the driving member (23), and the driving gear (231) is meshedly connected to the rack (211). The guide wheel (1) is rotatably connected to the first mounting plate (21) so as to be driven by the driving member (23) and driven by the meshing transmission of the driving gear (231) and the rack (211) to rise and fall along with the first mounting plate (21).

13. The coil-wound conductor follow-up reverse bending mechanism according to claim 12, characterized in that: The first mounting plate (21) is also provided with a limit block (212). The limit blocks (212) are provided in two pieces, and are respectively arranged at the two ends of the meshing stroke of the driving gear (231) corresponding to the lifting stroke of the guide wheel (1).

14. The coil-wound conductor follow-up reverse bending mechanism according to claim 12, characterized in that: One end of the rotating shaft (11) of the guide wheel (1) is connected to a bearing seat (213) arranged at the bottom of the first mounting plate (21) through a bearing, and the other end is connected to a threaded handle (12) through a thread, so that the guide wheel (1) is fixed by the threaded handle (12).

15. The coil-wound conductor follow-up reverse bending mechanism according to claim 8, characterized in that: The adjustment component (2) is mounted on a wire arrangement frame (6) where a wire arrangement mechanism (3) is located in the winding device, and can move laterally along the axial direction relative to the coil mold (4) together with the wire arrangement frame (6).

16. A transformer coil winding device, characterized in that: include: The winding device is used to install the coil mold (4) and wind the wire (5) around the coil mold (4) by rotating and winding. A wire arranging device, the wire arranging device comprising a wire arranging mechanism (3), a wire arranging frame (6) and a coil-wound conductor follow-up reverse bending mechanism according to any one of claims 6 to 15, the wire arranging mechanism (3) and the coil-wound conductor follow-up reverse bending mechanism are both mounted on the wire arranging frame (6), The wire arrangement mechanism (3) is used to supply the wire (5) to the coil mold (4). The coil winding conductor follower reverse bending mechanism is used to support the conductor (5) wound around the coil mould (4), so that the conductor (5) forms a bending arc in the opposite direction to the outer surface of the coil mould (4) and is then wound on the coil mould (4).

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