Layered coil winding machine for transformer

Abstract

The invention discloses a transformer layer type coil winding machine, which comprises a coil driving device, a winding displacement device and a paper supply device, and is characterized in that the coil driving device is connected with a coil mold and drives the coil mold to rotate, and a lead and an insulation paper tape are wound on the coil mold through rotary winding; and the wire arranging device and the paper feeding device are respectively used for supplying a wire and an insulation paper tape to the coil driving device, and can move along the axial direction of the coil mold relative to the coil driving device, so that the wire and the insulation paper tape are wound on the coil mold along the axial direction of the coil mold. The winding machine is high in automation degree, the labor intensity of manpower and the dependence on personnel experience are reduced, human errors are prevented from being introduced, and the quality of coil products is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of transformer manufacturing, and in particular to a transformer layer coil winding machine. Background Art

[0002] In the manufacturing process of transformers, the coil winding process is crucial. However, the traditional coil winding method is rough and involves many manual steps. Even if combined with equipment, the equipment still has problems such as low automation level and low production efficiency, which requires continuous manual operation during the winding process. Not only is the labor intensity high, but it also relies heavily on personnel experience and increases the probability of human error. The winding process also has defects such as poor coil winding quality due to factors such as unstable starting / braking, manual arrangement, and uneven mechanical strength. Therefore, the transformer manufacturing field is in urgent need of a winding equipment with relatively complete functions and high degree of automation. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a transformer layer coil winding machine in view of the above-mentioned deficiencies in the prior art. The winding machine has a high degree of automation, reduces manual labor intensity and dependence on personnel experience, avoids the introduction of human errors, and effectively improves the quality of coil products.

[0004] The present invention provides a transformer layer coil winding machine, comprising a coil driving device, a wire arranging device and a paper feeding device. The coil driving device is connected to a coil mold and drives the coil mold to rotate, so that a conductor and an insulating paper tape are wound on the coil mold by rotating and winding. The wire arranging device and the paper feeding device are respectively used to supply the conductor and the insulating paper tape to the coil driving device, and can move relative to the coil driving device along the axial direction of the coil mold, so that the conductor and the insulating paper tape are wound on the coil mold along the axial direction of the coil mold.

[0005] Furthermore, the wire arrangement device includes a reverse bending mechanism, which includes a guide wheel. 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. The guide wheel supports 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 and is then wound on the coil mold.

[0006] Furthermore, the reverse bending mechanism also includes an adjusting component, 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, 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. The adjusting component 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 the wire can achieve after being supported by the guide wheel.

[0007] Furthermore, the reverse bending mechanism also includes a first control unit, which is electrically connected to the adjustment component and the coil driving device, and is used to control the adjustment component to drive the guide wheel to rise and fall with the rotation of the coil mold, 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.

[0008] Furthermore, the wire arranging device also includes a wire arranging rack mechanism and a wire conducting mechanism. The wire arranging rack mechanism includes a bracket assembly and a mounting plate. The mounting plate is movably connected to the bracket assembly along the axial direction of the coil mold. The wire conducting mechanism and the reverse bending mechanism are both installed on the mounting plate and supported by the mounting plate to move synchronously relative to the axial direction of the coil mold.

[0009] Furthermore, the wire mechanism includes a guide wheel mounting plate and a wire arranging wheel, the guide wheel mounting plate is connected to the mounting plate, the axial direction of the wire arranging wheel is parallel to the axial direction of the coil mold, and is rotatably connected to the guide wheel mounting plate, the reverse bending mechanism is connected to the guide wheel mounting plate, and the wire supplied by the pay-off frame mechanism bypasses the wire arranging wheel and is introduced into the reverse bending mechanism to finally reach the coil mold.

[0010] Furthermore, the paper feeding device includes an end insulation mechanism, which includes an end insulation box and a cylinder. The end insulation box is movably mounted on the mounting plate and is located on the side of the wire mechanism. The cylinder is connected to the end insulation box and is used to drive the end insulation box to move so as to be able to approach and move away from the coil mold.

[0011] Furthermore, the paper feeding device includes an interlayer insulation mechanism, the interlayer insulation mechanism includes a paper tape supply assembly, the paper tape supply assembly includes a shell, a reel and a reel drive, the reel drive is arranged in the shell, the reel can be rotatably connected to the outer surface of the shell, the end of the reel passes through the shell and is connected to the driving end of the reel drive, the reel is connected to a paper tape reel wound by an insulating paper tape, so that it rotates under the drive of the reel drive and supplies the insulating paper tape to the coil mold to form interlayer insulation on the coil mold.

[0012] Furthermore, the paper tape supply assembly also includes a tension adjusting part, which includes a rocker arm, a pneumatic float rod and a guide wheel. The outer shell of the pneumatic float rod is hinged on the outer surface of the shell, and the driving rod of the pneumatic float rod is connected to the end of the rocker arm. The end of the rocker arm connected to the driving rod is provided with a rotatable guide wheel, and the other end is hinged to the outer surface of the shell. The insulating paper tape is led out from the paper tape reel on the unwinding shaft, bypasses the guide wheel and is then wound onto the coil mold to achieve automatic tensioning under the support of the pneumatic float rod.

[0013] Furthermore, a first sensor is connected to the end of the rocker arm hinged on the outer surface of the shell, which is used to sense the position of the rocker arm. The paper tape supply assembly is also provided with a second sensor for sensing the supply length of the insulating paper tape. The paper tape supply assembly also includes a third control unit, which is electrically connected to the unwinding drive, the first sensor and the second sensor, and is used to obtain the real-time winding diameter of the paper tape reel according to the second sensor and the initial winding diameter of the paper tape reel, and control the rotation speed of the unwinding drive to drive the unwinding shaft according to the real-time winding diameter and the position sensed by the first sensor, so as to keep the winding tension of the insulating paper tape within a set range.

[0014] Furthermore, the paper tape supply assembly also includes a guide wheel, which is provided with multiple guide wheels and can be rotatably connected to the outer surface of the shell. The insulating paper tape is led out from the paper tape reel on the unwinding shaft, passes around each guide wheel, and is then wound onto the coil mold.

[0015] Furthermore, the interlayer insulation mechanism also includes a chassis assembly, a transverse driving member and a second control unit, the paper tape supply assembly is installed on the chassis assembly, the transverse driving member is connected to the chassis assembly and drives the chassis assembly to drive the paper tape supply assembly to move axially along the coil mold; the second control unit is electrically connected to the transverse driving member and the coil driving device, respectively, and is used to control the transverse driving member to drive the chassis assembly to drive the paper tape supply assembly to move according to the number of turns of the coil driving device driving the coil mold to rotate, so that: the paper tape supply assembly moves from the head end to the tail end relative to the interlayer insulation area on the coil mold, thereby winding the insulating paper tape from the head end to the tail end of the interlayer insulation area of ​​the coil mold to form the interlayer insulation of the current layer, and the paper tape supply assembly moves in the opposite direction from the tail end of the interlayer insulation area of ​​the coil mold to lead the insulating paper tape from the tail end of the interlayer insulation area of ​​the coil mold to the next layer, so that the insulating paper tape can be wound to form the interlayer insulation of the next layer.

[0016] Further, the second control unit is used to control the distance that the transverse driving member drives the chassis assembly to drive the paper tape supply assembly to move axially relative to the coil mold according to the number of turns of the coil driving device driving the coil mold through the following calculation formula, so as to form interlayer insulation with a trapezoidal cross section on the coil mold:

[0017]

[0018] Where k is the distance that the paper tape supply assembly moves horizontally from the head end to the tail end along the axial direction of the coil mold when the coil mold rotates for the nth turn, h1 is the closed thickness of the trapezoidal interlayer insulation, h2 is the open thickness of the trapezoidal interlayer insulation, L is the width of the interlayer insulation area, H 绝 is the cross-sectional thickness of the insulating paper tape, W 绝 is the cross-sectional width of the insulating paper tape.

[0019] Furthermore, the paper tape supply assembly is provided with two groups, the first group of paper tape supply assemblies is installed on the chassis assembly, and the second group of paper tape supply assemblies is movably installed on the top of the first group of paper tape supply assemblies along the axial direction of the coil mold to adjust the overlap of the insulating paper tapes supplied by the two groups of paper tape supply assemblies in the width direction.

[0020] Furthermore, the coil driving device includes a main spindle box and a tailstock box, both of which are provided with chucks, and the main spindle box and the tailstock box are respectively connected to the two ends of the coil mold through the chuck clamping, and a spindle driving member is provided in the main spindle box, which is used to drive the chuck on the main spindle box to rotate, so as to drive the coil mold to rotate and make the chuck on the tailstock box rotate accordingly.

[0021] Furthermore, the winding machine also includes an electrical control box and a base, the spindle box and tailstock box are movably installed on the base along the axis of the coil mold so as to be able to move toward or in the opposite direction, the wire arranging device and the paper feeding device are both arranged on the same side of the connecting line of the spindle box and the tailstock box, opposite to the gap between the spindle box and the tailstock box for installing the coil mold, and are installed on the base, and the wire arranging device is arranged astride the paper feeding device, and the electrical control box is installed on the base, located on the side of the spindle box away from the tailstock box, and is used to control the operation of the spindle box, the wire arranging device and the paper feeding device and supply power.

[0022] The transformer layer coil winding machine of the present invention adopts a wire arranging device and a paper feeding device to supply the conductive wire and the insulating paper tape respectively, and during the winding process, the wire arranging device and the paper feeding device can also move axially relative to the coil mold, and then cooperate with the coil driving device to drive the coil mold to rotate and rewind, so as to realize the winding of the conductive wire and the insulating paper tape. The automation degree of the whole winding process is greatly improved, and the degree of personnel participation is reduced, so the dependence on personnel experience is reduced, and the introduction of human errors is avoided. Moreover, because of this, the quality of the coil products is effectively improved, which is equivalent to providing a transformer layer coil winding equipment with more complete functions, higher automation degree and better output quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 2 is a schematic structural diagram of a transformer layer coil winding machine according to an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the guide wheel arrangement position of the transformer layer coil winding machine in an embodiment of the present invention;

[0025] Figure 3 It is a structural schematic diagram of a reverse bending mechanism and a conductor mechanism of a transformer layer coil winding machine in an embodiment of the present invention;

[0026] Figure 4 Schematic diagram of the installation of the reverse bending mechanism of the transformer layer coil winding machine in the embodiment of the present invention;

[0027] Figure 5 Schematic diagram of meshing of a rack and a driving gear of a transformer layer coil winding machine according to an embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the guide wheel connection structure of the transformer layer coil winding machine in an embodiment of the present invention;

[0029] Figure 7 Schematic diagram of the three-dimensional structure of the interlayer insulation mechanism of the transformer layer coil winding machine in the embodiment of the present invention;

[0030] Figure 8 is another three-dimensional structural schematic diagram of the interlayer insulation mechanism of the transformer layer coil winding machine in an embodiment of the present invention;

[0031] Fig. 9 1 is a schematic structural diagram of an interlayer insulation mechanism of a transformer layer coil winding machine according to an embodiment of the present invention;

[0032] Fig.10 1 is a schematic structural diagram of a paper tape supply assembly located at the top of a transformer layer coil winding machine in an embodiment of the present invention;

[0033] Fig.11 is another structural schematic diagram of a paper tape supply assembly located at the top of a transformer layer coil winding machine in an embodiment of the present invention;

[0034] Fig.12 It is a structural schematic diagram of a paper tape supply assembly located at the bottom of a transformer layer coil winding machine in an embodiment of the present invention;

[0035] Fig.13 is another structural schematic diagram of a paper tape supply assembly located at the bottom of a transformer layer coil winding machine in an embodiment of the present invention;

[0036] Fig.14 1 is a schematic structural diagram of a tension adjusting member in a transformer layer coil winding machine according to an embodiment of the present invention;

[0037] Fig.15 Schematic diagram of the arrangement position of the absolute encoder in the transformer layer coil winding machine according to an embodiment of the present invention;

[0038] Fig.16 Schematic diagram of the arrangement position of the incremental encoder in the transformer layer coil winding machine according to an embodiment of the present invention;

[0039] Fig.17 is a structural schematic diagram of a chassis assembly in a transformer layer coil winding machine in an embodiment of the present invention;

[0040] Fig.18Schematic diagram of the arrangement position of the proximity switch of the chassis assembly in the transformer layer coil winding machine in an embodiment of the present invention;

[0041] Fig.19 It is a schematic diagram of the combination of the upper and lower paper tape supply components and the chassis component in the transformer layer coil winding machine in an embodiment of the present invention;

[0042] Fig. 20 It is a schematic structural diagram of a main shaft box in a transformer layer coil winding machine according to an embodiment of the present invention.

[0043] In the figure:

[0044] 1. Coil drive device; 11. Spindle box; 12. Tailstock box; 13. Chuck; 14. Spindle drive unit;

[0045] 2. Wire arrangement device; 21. Reverse bending mechanism; 211. Guide wheel; 2111. Wire guide groove; 212. Adjustment assembly; 2121. Guide rail mounting plate; 2122. Lifting drive member; 2123. Linear guide slider; 2124. Rack; 2125. Driving gear; 2126. Limit block; 2127. Bearing seat; 213. Rotating shaft; 214. Threaded handle; 215. Compression spring; 22. Wire arrangement rack mechanism; 221. Bracket assembly; 2211. Cantilever beam; 2212. Cantilever beam bracket; 2213. Ball screw; 222. Mounting plate; 23. Wire guide mechanism; 231. Guide wheel mounting plate; 2311. First proximity switch; 2312. Zero position mounting plate; 232. Wire arrangement wheel; 24. Pay-off rack mechanism;

[0046] 3. Paper feeding device; 31. End insulation mechanism; 311. End insulation box; 32. Interlayer insulation mechanism; 321. Paper tape supply assembly; 3211. Shell; 3212. Unwinding shaft; 3213. Unwinding drive member; 3214. Guide wheel; 3215. Rocker; 3216. Pneumatic float rod; 3217. Toothed pulley; 32171. Pulley baffle; 3218. Synchronous belt; 3219. Extension arm; 32191. Cylinder; 32192. Button; 322. Chassis assembly; 3221. Bottom plate; 3222. Chassis; 3223. Turbine screw lifter; 3224. Guide rod; 3225. Oil drain assembly; 3226. Organ cover; 3227. Second proximity switch; 323. Transverse drive member; 33. Wide paper insulation mechanism;

[0047] 4. Coil mold; 5. Wire; 6. Insulating paper tape; 7. Electrical control box; 8. Base. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Example

[0053] like Figure 1 As shown, the transformer layer coil winding machine of this embodiment includes a coil driving device 1, a wire arrangement device 2 and a paper supply device 3. The coil driving device 1 is connected to the coil mold 4 and drives the coil mold 4 to rotate, so that the conductor 5 and the insulating paper tape 6 are wound on the coil mold 4 by rotating and winding. The wire arrangement device 2 and the paper supply device 3 are respectively used to supply the conductor 5 and the insulating paper tape 6 to the coil driving device 1, and can move relative to the coil driving device 1 along the axial direction of the coil mold 4, so that the conductor 5 and the insulating paper tape 6 are wound on the coil mold 4 along the axial direction of the coil mold 4.

[0054] The transformer layer coil winding machine of the present embodiment adopts a wire arrangement device 2 and a paper supply device 3 to supply a conductor 5 and an insulating paper tape 6 respectively, and during the winding process, the wire arrangement device 2 and the paper supply device 3 can also move axially relative to the coil mold 4, and then cooperate with the coil driving device 1 to drive the coil mold 4 to rotate and reel, so as to realize the winding of the conductor 5 and the insulating paper tape 6. The automation degree of the whole winding process is greatly improved, and the degree of personnel participation is reduced, so the dependence on personnel experience is reduced, and human errors are avoided. Because of this, the quality of the coil products is effectively improved, which is equivalent to providing a transformer layer coil winding equipment with more complete functions, higher automation degree and better output quality.

[0055] In this embodiment, Figures 2 to 4 As shown, the wire arrangement device 2 includes a reverse bending mechanism 21, and the reverse bending mechanism 21 includes a guide wheel 211. The guide wheel 211 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 211 supports the wire 5 wound around the coil mold 4 so that the wire 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.

[0056] In the past, in order to ensure that the radial dimensions of the coil meet the insulation requirements after the wire is wound, the coil usually needs to be pressed and shaped after the winding is completed and demolded. In the traditional transformer layer coil winding process, once the wire is wound and the tension is lost, it often rebounds, causing looseness before pressing. This is because the wire needs to release stress when it is wound on the coil mold with a curved surface. There is currently no mature technical means for stress release. The present embodiment provides a reverse bending mechanism 21, which supports the wire 5 to pre-form a bending arc opposite to the outer surface of the coil mold 4 through the guide wheel 211, which is equivalent to adding a pretreatment process for reverse bending of the wire 5 in front of the coil mold 4. By applying reverse bending before the wire 5 is wound, plastic deformation is preset and prestress is applied to the wire 5. Due to the existence of prestress, the wire 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 wire 5 and reduce damage caused by stress concentration. Since this arrangement helps to reduce the rebound phenomenon after winding, the wire 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.

[0057] In this embodiment, the reverse bending mechanism 21 also includes an adjusting component 212. The guide wheel 211 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 wire 5 is wound from the side of the guide wheel 211 away from the coil mold 4 to the bottom of the guide wheel 211 and then from the top of the coil mold 4 to the side of the coil mold 4 away from the guide wheel 211. The adjusting component 212 is connected to the guide wheel 211 and can drive the guide wheel 211 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 211.

[0058] This layout of the present embodiment 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 below and outside the guide wheel 211, so that the coil mold is fully exposed, making it convenient for personnel to observe and operate the wires arranged on the coil mold 4.

[0059] When the curvature of the coil mold 4 varies, the fit between the wire 5 and the coil is easily affected by the shape of the coil, because the bending degrees of the wires on the long axis and the short axis are different, which may lead to uneven mechanical strength of the coil, and the residual stress of the long axis part with a larger bending degree is relatively high. When the external force of winding is removed, the wire will rebound more obviously to release the stress. The present embodiment uses an adjustment component 212 to adjust the position of the guide wheel 211, thereby changing the bending degree of the wire 5, which is equivalent to the prestress applied to the wire 5 by the guide wheel 211 being adjustable. Therefore, the present embodiment can be used for structures with inconsistent circumferential bending degrees of the outer surface such as oblong coil molds 4 and elliptical coil molds 4. Through this adjustment, it can adapt to the outer surface areas with different bending degrees, thereby achieving the beneficial effect of equal and balanced internal stress when the wire 5 is wound, and further optimizing the role of the present device.

[0060] In this embodiment, the upper and lower limits of the lifting stroke of the guide wheel 211 are determined by the mechanical structure installation. The horizontal distance between the guide wheel 211 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.

[0061] In this embodiment, the reverse bending mechanism 21 also includes a first control unit, which is electrically connected to the adjustment component 212 and the coil driving device 1, and is used to control the adjustment component 212 to drive the guide wheel 211 to rise and fall with the rotation of the coil mold 4, so that: when the guide wheel 211 is at the upper limit of the stroke, the wire 5 tangent to the guide wheel 211 reaches the coil mold 4 and is wound around the long axis vertex M of the coil mold 4; when the guide wheel 211 is at the lower limit of the stroke, the wire 5 tangent to the guide wheel 211 reaches the coil mold 4 and is wound around the short axis vertex N of the coil mold 4.

[0062] 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 211 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 various places. In this way, the wire 5 and the surface of the coil mold 4 are more conformable.

[0063] In this embodiment, the first control unit can make the guide wheel 211 rise and fall with the rotation of the coil mold 4 according to the preset built-in setting correspondence, so as to achieve the above-mentioned travel plan. The process of obtaining this setting correspondence is roughly as follows:

[0064] The change of the high point coordinate value of the coil mold 4 (i.e., the coordinate value of the highest point of the coil mold 4 in the vertical direction) 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 high point of the coil at that moment, and the following is obtained:

[0065]

[0066] θ=-wt

[0067] 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;

[0068] Then, the relationship between the real-time high point coordinate value y of the coil mold 4 and its change over time t is obtained according to the following calculation formula:

[0069]

[0070] 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;

[0071] According to the relationship between the real-time high point coordinate value y and time t, the wire 5 (i.e. Figure 2 The distance L of the wire 5 between the AB segments is obtained to obtain the delay time required for the wire 5 tangent to the guide wheel 211 to reach the coil mold 4, specifically including:

[0072] 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;

[0073] Depend on Obtain the delay time t1 required for the conductor 5 tangent to the guide wheel 211 at the upper limit of the stroke to reach the end point M of the long axis of the coil mold 4;

[0074] Depend on Obtain the delay time t2 required for the conductor 5 tangent to the guide wheel 211 at the lower limit of the stroke to reach the end point N of the short axis of the coil mold 4;

[0075] Then, the setting correspondence between the travel position of the guide wheel 211 and the rotation position of the coil mold 4 is determined according to the delay time, specifically including:

[0076] At time t1 before the coil mold 4 rotates to the horizontal position of the short axis, the guide wheel 211 is at the upper limit of the stroke;

[0077] At time t2 before the coil mold 4 rotates to the horizontal position of the long axis, the guide wheel 211 is at the lower limit of the stroke;

[0078] The time T for the coil mold 4 to rotate one circle is regarded as a cycle. In one cycle, the guide wheel 211 has two up and down strokes. The travel time of the guide wheel 211 from the lower limit to the upper limit is The travel time of the guide wheel 211 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. The upper and lower limits can be realized by the first proximity switch 2311, the fourth control unit, the lifting drive 2122 and other auxiliary elements (such as the limit block 2126) described below. In other embodiments, other components that can complete this function can also be used, which will not be described in detail here.

[0079] In this embodiment, Figure 3 and Figure 4As shown, the adjustment component 212 of the reverse bending mechanism 21 specifically includes a guide rail mounting plate 2121 and a lifting drive member 2122. The guide wheel 211 is rotatably mounted on the bottom end of the guide rail mounting plate 2121 by a bearing connection method. The guide rail mounting plate 2121 is movably connected to the guide wheel mounting plate 231 of the wire guide mechanism 23 in the vertical direction. Specifically, a sliding pair such as a linear guide slider 2123 can be used to realize a relative movable connection in the vertical direction (for example, a slider is set on the guide rail mounting plate 2121, and a slider is set on the guide wheel mounting plate 231). The guide rail mounting plate 2121 is provided with a vertically arranged rack 2124, the lifting drive 2122 is connected to the guide wheel mounting plate 231, and a driving gear 2125 is provided at the driving end of the lifting drive 2122, and the driving gear 2125 is meshed and connected to the rack 2124, and the guide wheel 211 is rotatably connected to the guide rail mounting plate 2121, so that under the drive of the lifting drive 2122, the driving gear 2125 and the rack 2124 are meshed and driven, and the guide wheel 211 is lifted and lowered along with the guide rail mounting plate 2121. The lifting drive 2122 may include a servo motor and a reducer, the output shaft of the servo motor is connected to the input shaft of the reducer, and the input shaft of the reducer is connected to the driving gear 2125.

[0080] In this embodiment, Figure 5 As shown, the guide rail mounting plate 2121 is also provided with a limit block 2126, and two limit blocks 2126 are provided, which are respectively arranged at the two ends of the meshing stroke of the driving gear 2125 corresponding to the lifting stroke of the guide wheel 211. Therefore, when the guide wheel 211 is lifted to the end of the stroke, the driving gear 2125 also moves relative to the rack 2124 to reach the limit block 2126, so that the limit of the mechanical structure prevents the control failure of the mechanism from being restricted, thereby ensuring the operation safety.

[0081] The guide wheel mounting plate 231 is provided with a first proximity switch 2311 and a zero position mounting plate 2312. Specifically, a first proximity switch 2311 is respectively provided at the position of the guide wheel mounting plate 2121 on the upper and lower sides of the guide wheel mounting plate 231, which is used to sense the position of the guide wheel 211. As a sensor of the position of the guide wheel 211, an additional first proximity switch 2311 is provided below the guide wheel mounting plate 231, which is used as a zero position sensing component of the guide wheel 211, so that the upper and lower limits can be accurately positioned and measured. The two first proximity switches 2311 below are both installed on the zero position mounting plate 2312. As part of the closed-loop control, the proximity switch functions as a sensor.

[0082] In this embodiment, Figure 6As shown, one end of the rotating shaft 213 of the guide wheel 211 is connected to the bearing seat 2127 provided at the bottom of the guide rail mounting plate 2121 through a bearing, and the other end is connected to the threaded handle 214 through a thread, so as to block and fix the guide wheel 211 through the threaded handle 214. A compression spring 215 can be supported and arranged between the threaded handle 214 and the inner hole of the rotating shaft 213 to facilitate the disassembly and assembly of the threaded handle 214. A wire groove 2111 can also be provided on the guide wheel 211 to fix the wire 5 to prevent the wire 5 from falling off.

[0083] In this embodiment, Figure 1 As shown, the wire arrangement device 2 also includes a wire arrangement frame mechanism 22, a wire mechanism 23 and a wire pay-off frame mechanism 24. The wire arrangement frame mechanism 22 includes a bracket assembly 221 and a mounting plate 222. The mounting plate 222 is movably connected to the bracket assembly 221 along the axial direction of the coil mold 4. The wire mechanism 23 and the reverse bending mechanism 21 are both installed on the mounting plate 222, and are supported by the mounting plate 222 to move synchronously relative to the axial direction of the coil mold 4, so that the wire 5 output by the wire mechanism 23 can be wound around the coil mold 4 along the axial direction of the coil mold 4, and the reverse bending mechanism 21 can also move with the wire mechanism 23.

[0084] The wire pay-off mechanism 24 moves synchronously with the mounting plate 222 and is used to supply the wire 5 to the wire mechanism 23 so that the wire 5 is guided by the wire mechanism 23 and then formed into a curvature opposite to the outer surface of the coil mold 4 at the reverse bending mechanism 21 before being wound on the coil mold 4.

[0085] Among them, the bracket assembly 221 includes a cantilever beam 2211 and a cantilever beam bracket 2212. The cantilever beam bracket 2212 is a rod, which is vertically installed on the installation plane (on the base 8) where the transformer layer coil winding machine is located. The cantilever beam 2211 is a horizontal beam installed on the top of the cantilever beam bracket 2212 and arranged along the axial direction of the coil mold 4. The cantilever beam 2211 includes a bracket welding part, and the bracket welding part set on the cantilever beam 2211 is connected to the cantilever beam bracket 2212 through a hexagonal thin nut with fine teeth (or called a hexagonal fine-tooth nut or a fine-tooth hexagonal nut on the market) (the bracket welding part is a conventional workpiece, and the connection method is a relatively conventional connection method, so it is not repeated here).

[0086] A ball screw 2213 is arranged on the cantilever beam 2211, and the screw bases at both ends of the ball screw are fixed on the cantilever beam 2211 so that the screw itself is arranged along the cantilever beam 2211, and the screw mounting plate on the screw is connected to the mounting plate 222. A servo motor and a reducer can also be arranged on the mounting plate 222. The servo motor is connected to the screw through the reducer, thereby driving the screw to rotate, so as to drive the mounting plate 222 to move along the screw, thereby realizing the movement of the wire guide mechanism 23 and the reverse bending mechanism 21, and a sliding pair such as a linear guide rail can also be arranged between the mounting plate 222 and the cantilever beam 2211. In other embodiments, other conventional linear motion driving methods (such as rack and pinion meshing, telescopic drive, etc.) can also be adopted.

[0087] In this embodiment, the wire mechanism 23 includes a guide wheel mounting plate 231 and a wire arrangement wheel 232. The guide wheel mounting plate 231 is connected to the mounting plate 222. The axial direction of the wire arrangement wheel 232 is parallel to the axial direction of the coil mold 4 and is rotatably connected to the guide wheel mounting plate 231. The reverse bending mechanism 21 (the guide rail mounting plate 2121) is connected to the guide wheel mounting plate 231 (that is, it is indirectly installed on the mounting plate 222). The wire 5 supplied by the pay-off frame mechanism 24 bypasses the wire arrangement wheel 232 and is introduced into the reverse bending mechanism 21 to finally reach the coil mold 4. The guide wheel mounting plate 231 can be a vertical plate surface perpendicular to the axial direction of the coil mold 4. There are two wire arrangement wheels 232, and the two arrangement positions are arranged perpendicular to the front and rear directions of the axial direction of the coil mold 4, so they can be called front and rear wire arrangement wheels, which together guide the winding of the wire 5.

[0088] The wire mechanism 23 may also include a fourth control unit, which may be electrically connected to the servo motor and the coil drive device 1 of the mounting plate 222, respectively, so that after the wire is initially positioned, the mounting plate 222 is controlled to translate at a uniform speed according to the wire width and the angular velocity of the coil mold 4 driven by the coil drive device 1 (spindle). The fourth control unit may also cooperate with various sensors, such as ultrasonic measurement of the reel diameter and meter measurement speed during winding, so as to make real-time adjustments. The wire mechanism 23 (on the guide wheel mounting plate 231) may also be provided with a wire feeding cylinder, the driving end of which may support the wire, and the tension of the wire 5 may be adjusted by the cylinder air pressure buffer during winding.

[0089] In this embodiment, the winding machine can also use a pay-off frame mechanism 24 to provide the wire 5 for the wire mechanism 23. The pay-off frame keeps the coordinates synchronously following when the wire arrangement mechanism is moved, which can be achieved by combining position detection with motor drive. The pay-off frame mechanism 24 can use conventional pay-off machines and other equipment, which will not be described in detail here.

[0090] In this embodiment, the paper feeding device 3 includes an end insulation mechanism 31, and the end insulation mechanism 31 includes an end insulation box 311 and a cylinder. The end insulation box 311 (which can be a movable connection member such as a sliding pair arranged vertically with the coil mold 4) is movably installed on the mounting plate 222, located on the side of the wire mechanism 23, and is used to accommodate the end insulation paper. The cylinder is connected to the end insulation box 311, and is used to drive the end insulation box 311 to move so that it can approach and move away from the coil mold 4. In this embodiment, two end insulation boxes 311 are provided, and the two end insulation boxes are arranged on the left and right sides (along the axial direction of the coil mold) of the wire mechanism 23. When the coil is wound to the end, the end insulation box 311 is pushed by the cylinder to make the end insulation box 311 extend to facilitate the operator to take the end insulation. When the end insulation is wound, the end insulation paper is manually added and placed at the position corresponding to the end insulation, and the end insulation can be wound by the coil mold 4 through rotation and rewinding.

[0091] In this embodiment, Figures 7 to 9 As shown, the paper feeding device 3 also includes an interlayer insulation mechanism 32, and the interlayer insulation mechanism 32 includes a paper tape supply assembly 321. The paper tape supply assembly 321 includes a shell 3211, a reel 3212 and a reel drive 3213. The reel drive 3213 is arranged in the shell 3211, and the reel 3212 is rotatably connected to the outer surface of the shell 3211. The end of the reel 3212 passes through the shell 3211 and is connected to the driving end of the reel drive 3213. The reel 3212 is connected to a paper tape reel wound by an insulating paper tape 6, so that the insulating paper tape 6 is rotated to the coil mold 4 under the drive of the reel drive 3213 to form interlayer insulation on the coil mold 4.

[0092] Specifically, Figures 10 to 13 As shown, the unwinding shaft 3212 adopts an inflatable shaft, which is rotatably connected to the housing 3211 through a bearing and a bearing seat, and the paper tape reel is clamped and fixed by an inflatable manner (the structure and principle of the inflatable shaft are existing conventional contents, and will not be described in detail here). The unwinding drive member 3213 adopts a servo motor, and the output shaft of the servo motor and the unwinding shaft 3212 are both connected to a toothed belt wheel 3217, and the toothed belt wheel 3217 is blocked by a pulley baffle 32171. The toothed belt wheels 3217 on the two are connected by a synchronous belt 3218 to realize rotary transmission. That is, the servo motor drives the toothed belt wheel 3217 to drive another toothed belt wheel 3217 through the synchronous belt 3218, and the other toothed belt wheel 3217 is connected by an inflatable shaft (through the bearing seat and the round nut and the baffle connecting plate and other components) to rotate the insulating paper tape reel. In this embodiment, the internal transmission structure used for paper supply of the two sets of paper tape supply components 321 is consistent.

[0093] In this embodiment, Fig.14As shown, the paper tape supply assembly 321 also includes a tension adjusting member, which includes a rocker arm 3215, a pneumatic float rod 3216 and a guide wheel 3214. The outer shell of the pneumatic float rod 3216 is hinged on the outer surface of the shell 3211, and the driving rod of the pneumatic float rod 3216 is connected to the end of the rocker arm 3215. The end of the rocker arm 3215 connected to the driving rod is provided with a rotatable guide wheel 3214, and the other end is hinged on the outer surface of the shell 3211. The insulating paper tape 6 is led out from the paper tape reel on the unwinding shaft 3212, bypasses the guide wheel 3214, and is then wound onto the coil mold 4, so as to achieve automatic tensioning under the support of the pneumatic float rod 3216. For example, when the speed of the insulating paper tape 6 changes due to problems with the operation of the motor, the tension will change. The pneumatic float rod 3216 can drive the insulating paper tape 6 to support itself through the air pressure of the internal gas, so that the insulating paper tape 6 will not become loose or too tight on the winding path. The specific air pressure of the pneumatic float rod 3216 can be set according to actual working conditions, and will vary depending on the material of the paper tape, the environment, etc., so it will not be elaborated here.

[0094] Conventional coil winding usually uses winding and unwinding, etc., and uses asynchronous AC motors for driving, which makes the starting / braking unstable and has no tension control system, so the coil winding quality is not high. However, this embodiment realizes automatic tensioning through the pneumatic floating rod 3216, thereby improving the coil winding quality.

[0095] In addition, in this embodiment, a first sensor is connected to the end of the swing rod 3215 hinged to the outer surface of the housing 3211 to sense the position of the swing rod 3215. Specifically, an absolute encoder can be used, such as Fig.15 As shown, the paper tape supply assembly 321 is also provided with a second sensor for sensing the supply length of the insulating paper tape 6, which can be an incremental encoder. The incremental encoder is arranged at the guide wheel 3214 (which is directly connected to the surface of the housing 3211 and is not on the swing rod 3215), as shown in FIG. Fig.16 The paper tape supply assembly 321 also includes a third control unit, which is electrically connected to the unwinding drive 3213, the first sensor and the second sensor, and is used to obtain the real-time winding diameter of the paper tape reel according to the second sensor and the initial winding diameter of the paper tape reel, and to control the rotation speed of the unwinding drive 3213 to drive the unwinding shaft 3212 according to the real-time winding diameter and the position sensed by the first sensor, so as to keep the winding tension of the insulating paper tape 6 within a set range.

[0096] This control method can make the tape output and unwinding conditions adapt to each other in real time to avoid tape output fluctuations, so that the winding tension can be maintained within a certain range. It is more suitable for winding oblong and elliptical coils with long and short axes when rotating, so that each turn of the coil product can be maintained at the set level, thereby improving product quality.

[0097] In this embodiment, the real-time tape delivery speed (real-time linear speed) of the paper tape will affect the real-time position of the swing rod 3215. Therefore, this embodiment is equivalent to controlling the rotation speed of the unwinding drive 3213 driving the unwinding shaft 3212 through the real-time coil diameter and the real-time tape delivery speed, so that the unwinding speed and the winding speed of the coil mold are adapted to achieve the purpose of controlling the tension. The tension of the insulating paper tape can be dynamically controlled by the pneumatic floating rod buffer and tension, and the tension fluctuation can be controlled within ±10%. The tension adjustment member and the third control unit can also be collectively referred to as a paper tape tension control system. This method of controlling tension according to numerical values ​​can be pre-made into a corresponding relationship table of speed (position)-coil diameter-drive rotation by experiments or simulations, and pre-set in the third control unit, so as to adjust directly according to the corresponding relationship. The specific coefficients and connections of this corresponding relationship can be specifically selected according to various real-time conditions such as the material, size, and working conditions of the paper tape, and are not specifically limited here.

[0098] In this embodiment, the paper tape supply assembly 321 also includes a guide wheel 3214, and a plurality of guide wheels 3214 are provided, and all of them can be rotatably connected to the outer surface of the housing 3211. Specifically, one guide wheel 3214 is arranged on the swing rod 3215 of the tension adjusting member, and the other guide wheels 3214 are directly rotatably connected to the housing 3211. The insulating paper tape 6 is drawn out from the paper tape reel on the unwinding shaft 3212, passes around each guide wheel 3214, and is wound onto the coil mold 4. The rotating shaft of the guide wheel 3214 can be made of a low-damping bearing and a low-moment-of-inertia roller (i.e., a structure with as low damping and low-moment-of-inertia as possible under the condition of meeting the requirements of diameter, etc.) for corresponding rotatable connection to ensure that there is no jamming during the paper tape running process and that the tension is reliably transmitted. The arrangement position and number of each guide wheel 3214 can be selected and adjusted according to the winding path of the paper tape and the actual work requirements, and will not be elaborated here.

[0099] In this embodiment, the interlayer insulation mechanism 32 further includes a chassis assembly 322, a transverse driving member 323 and a second control unit. The paper tape supply assembly 321 is installed on the chassis assembly 322. The transverse driving member 323 is connected to the chassis assembly 322 and drives the chassis assembly 322 to drive the paper tape supply assembly 321 to move axially along the coil mold 4; the second control unit is electrically connected to the transverse driving member 323 and the coil driving device 1 respectively, and is used to drive the coil mold 4 to rotate according to the coil driving device 1, and control the transverse driving member 323 to drive the chassis assembly 322 to drive the paper tape supply assembly 321 to move, so that:

[0100] The paper tape supply assembly 321 moves from the head end to the tail end relative to the interlayer insulation area on the coil mold 4, so as to wind the insulating paper tape 6 from the head end to the tail end of the interlayer insulation area of ​​the coil mold 4 to form the interlayer insulation of the current layer, and,

[0101] The paper tape supply assembly 321 moves in the opposite direction from the tail end of the interlayer insulation area of ​​the coil mold 4 to lead the insulating paper tape 6 from the tail end of the interlayer insulation area of ​​the coil mold 4 to the next layer, so that the insulating paper tape 6 can be wound to form the next layer of interlayer insulation.

[0102] That is, this embodiment enables the interlayer insulation winding process to form a non-interrupted winding scheme that only winds back and forth within the interlayer insulation area. After the current layer is wound from the head end to the tail end, it is directly introduced into the winding of the next layer. When the next layer is wound, the tail end direction of the previous layer (that is, the aforementioned current layer) is used as the head end direction, and the winding continues from the head end to the tail end (that is, from the perspective of the current layer, the next layer is wound from the tail end to the head end).

[0103] Therefore, during this winding process, there is no need to cut or add the insulating paper tape 6 between layers, which not only greatly reduces the dependence on the operator's operating proficiency and operating accuracy, but also saves the intermittent operation time, effectively improves the winding efficiency and reduces the winding cost; and there is no need to wind the conductor 5 and the insulating paper tape 6 separately, and forward non-interrupted winding can be performed simultaneously.

[0104] In the present embodiment, when the paper tape supply component 321 supplies the insulating paper tape 6 to the coil mold, it can either perform reciprocating non-interrupted winding only for the interlayer insulation, and the end insulation can be wound using the end insulating paper tape supplied by the end insulation mechanism 31; or the insulating paper tape 6 of the paper tape supply component 321 can be rewound when each layer of interlayer insulation is wound to the tail end, thereby stacking to form end insulation, that is, directly completing the non-interrupted winding of the entire insulation including the end insulation and the interlayer insulation.

[0105] In this embodiment, the direction of the head and tail ends of the current interlayer insulation formed by the interlayer insulation mechanism 32 is opposite to the direction of the head and tail ends of the next interlayer insulation, so that the overall winding process of the wire 5 is arranged in an "S" shape in the radial cross section. The interlayer insulation winding step is used to form a trapezoidal interlayer insulation (the thickness of the thickest part of the trapezoid is called the opening thickness, and the thickness of the thinnest part is called the closed thickness) so that the increase in the thickness of the interlayer insulation is consistent with the increase in the voltage difference between the two layers of wires. When the shape of the interlayer insulation (the cross section in the axial direction of the coil mold) is a trapezoid, each wire layer is roughly arranged in a Z shape.

[0106] The coil after winding includes a conductor layer, an insulating layer (i.e., interlayer insulation) and end insulation. Both ends of the conductor layer and the insulating layer have end insulation wound with long strips of cardboard. The conductor layer and the insulating layer are alternately distributed layer by layer, and each insulating layer is located between two conductor layers. The voltage difference between the two layers of conductors gradually increases with the winding direction of the conductors. The greater the voltage difference, the thicker the thickness of the insulating layer. The general structure of the coil is basically the same as the coils currently on the market, so no drawings are provided in this embodiment. The difference is that each insulating layer of the coil can be formed by winding with the same insulating paper tape 6.

[0107] In this embodiment, the second control unit is used to control the lateral driving member 323 to drive the chassis assembly 322 to drive the paper tape supply assembly 321 to move axially relative to the coil mold 4 according to the number of turns of the coil driving device 1 driving the coil mold 4 through the following (first) calculation formula, so as to form an interlayer insulation with a trapezoidal cross section on the coil mold 4:

[0108]

[0109] Wherein, k is the distance that the paper tape supply assembly 321 moves horizontally from the head end to the tail end along the axial direction of the coil mold 4 when the coil mold 4 rotates for the nth turn, that is, the distance that the insulating paper tape 6 moves horizontally, h1 is the closed thickness of the trapezoidal interlayer insulation, h2 is the open thickness of the trapezoidal interlayer insulation, L is the width of the interlayer insulation area, H 绝 is the cross-sectional thickness of the insulating paper tape 6, W 绝 is the cross-sectional width of the insulating paper tape 6.

[0110] According to the relationship between the number of winding turns n and the lateral displacement distance k, the first strip of insulating paper is gradually transversely displaced from the head end to the tail end of the interlayer insulation area as the winding is performed. According to the formula, the change in the lateral displacement distance is first fast and then slow, and after being synthesized with the rotation of the winding, it presents a variable pitch motion trajectory. By using this calculation formula to perform the transverse displacement of the insulating paper tape 6, it is possible to not only make the insulating paper tape 6 fully wound when the coil mold 4 rotates to the conductor 5 to fully wind a layer, but also make the insulating paper tape 6 form a trapezoidal insulation that meets the interlayer voltage, so the insulating paper tape 6 does not need to be broken, and can be wound uninterruptedly together with the conductor 5. And precisely because the interlayer insulation can be wound non-interruptedly, there is no need for manual arrangement, so compared with the traditional method that the insulation layer and the end insulation part of the coil still need to be manually arranged, the automation level is greatly improved and the production efficiency is accelerated.

[0111] Specifically, the insulating layer is arranged in a trapezoidal shape. According to the required coil height and the interlayer voltage difference between the upper and lower layers of adjacent conductors, the required trapezoidal insulation thickness at the beginning and end (i.e., the narrower closed thickness and the wider open thickness) can be obtained. Assuming that when the nth turn is wound, the distance that the insulating paper tape moves horizontally from the beginning to the end along the axial direction of the coil is k, the arrangement method of the trapezoidal insulation can be calculated by the following formula, and finally the first calculation formula mentioned above is obtained:

[0112]

[0113] Among them, S 梯 ' is the axial cross-sectional area of ​​the trapezoidal interlayer insulation formed by stacking n turns of insulating paper tape, S 截 is the specification of the insulating paper tape. (Except for the expression "nth turn" in the above content, "n turns" refers to the period from the first turn to the nth turn, for example S 梯 ' is the area of ​​the trapezoid formed by stacking n turns of paper tape together).

[0114] In this embodiment, before the interlayer insulation is wound, the specification S of the insulating paper tape can also be obtained by the following second calculation formula: 截 :

[0115]

[0116] Among them, S 梯 is the axial cross-sectional area of ​​the current layer of trapezoidal interlayer insulation, and N is the number of turns of the insulating paper tape of the current layer of interlayer insulation; that is, the trapezoidal insulation area is obtained according to the required trapezoidal insulation size, and then the cross-sectional area of ​​a single turn of insulating paper tape is obtained according to the number of turns;

[0117] According to the specification S of insulating paper tape 截 Select paper tape from standard specifications to obtain the cross-sectional thickness H of the insulating paper tape. 绝 and section width W 绝 , thus obtaining insulating paper tape. For example, according to the cross-sectional thickness specifications of the interlayer insulating paper (strip insulating paper) commonly used in the workshop, which are 0.08mm and 0.13mm, if combined with two overlapping overlap schemes, there are several thicknesses of 0.08mm, 0.13mm, 0.16mm, 0.21mm, and 0.26mm to choose from. Then, according to the requirements for the cross-sectional width to prevent the tape from breaking, the width specification is selected within the width range of 15mm-40mm. The thickness specification can be selected in combination (that is, selected from a single sheet or selected from multiple overlapping schemes). In this embodiment, when the scheme of overlapping two insulating paper tapes is selected, the two sheets completely overlap in the width direction. In other implementation schemes, a 50% to 100% overlap method can also be selected depending on the specific situation.

[0118] In this embodiment, when the insulating paper tape is wound to the tail end of the interlayer insulation area, it can be rewound x turns at the tail end of the interlayer insulation area. Then, N in the second calculation formula is the difference between the number of turns m of the wire winding and the number of turns x of the rewinding. The operation of rewinding a few turns at the tail end can not only increase the insulation strength of the opening (i.e., the end with larger thickness) for the interlayer insulation, but also can return the position of the strip-shaped insulating paper to the correct position by rewinding in situ, which is convenient for the winding of the next layer. Generally, 2-3 turns are required at the end. If the insulating paper tape 6 is used to rewind to form the end insulation, the number of turns p of the rewinding stack to form the end insulation should be twice the thickness of the wire divided by the thickness of the insulating paper tape 6 (when the end insulation of the current layer is the end insulation of the current layer and the head end insulation of the next layer), then N in the second calculation formula is the difference between the number of turns m of the wire winding and the number of turns p of the rewinding.

[0119] In this embodiment, when the end insulation is not wound together with the interlayer insulation, the end insulation paper is wound with the tail end of the interlayer insulation area as the end insulation area when the (interlayer) insulation paper tape 6 is wound and reaches the tail end of the interlayer insulation area. Specifically, the end insulation paper is set on the insulation paper tape 6, so that the insulation paper tape 6 is padded under the end insulation paper. During the rotation of the coil main shaft, the interlayer insulation winding and the end insulation winding are completed. Therefore, there is no need to stop the coil and then wrap it around to perform winding, and the operation layout is more reasonable.

[0120] Specifically, when the insulating paper tape 6 reaches the end (the number of turns has been set), the coil driving device 1 will stop, prompting manual addition of end insulation; at this time, manual addition of end insulation is performed on top of the insulating paper tape 6, and as the coil main shaft rotates one circle, the end insulation is completed.

[0121] In this embodiment, Fig.17 As shown, the chassis assembly 322 includes a bottom plate 3221 and a chassis 3222. The interlayer insulation mechanism 32 is installed on the chassis 3222. The chassis 3222 can move relative to the bottom plate 3221 along the axial direction of the coil mold 4. The bottom plate 3221 is movably connected to the base 8 in a direction perpendicular to the axial direction of the coil mold 4. The bottom plate 3221 and the chassis 3222, as well as the bottom plate 3221 and the base 8 are movably connected in a linear direction through sliding pairs (i.e. conventional sliders and slide rails), and the driving movement in the moving direction is realized through the servo motor driving the gear and the rack meshing with the gear. At least one second proximity switch 3227 and a limit block are provided at both ends of the slide rail of each set of sliding pairs to limit the overall moving range of the mechanism. As shown Fig.18 As shown, there are specifically 6 second proximity switches 3227 at the chassis assembly 322. If the movable direction between the bottom plate 3221 and the chassis 3222 is set to the left and right direction, then one second proximity switch 3227 is installed at the left end of the rear side rail (the rail between the bottom plate 3221 and the chassis 3222), two second proximity switches 3227 are installed at the right end of the rear side rail, and the other two second proximity switches 3227 are installed at the front and back of the chassis assembly 322 (the rail between the bottom plate 3221 and the base 8), and the last second proximity switch 3227 is installed at the right end of the chassis assembly 322; cables are enclosed by drag chains between the relatively movable parts (which is a technology already available on the market). All slide rails are installed with accordion covers 3226 (which is a technology already available on the market).

[0122] like Fig.19As shown, the interlayer insulation mechanism 32 and the chassis 3222 can also be lifted and lowered in the vertical direction, specifically through the turbine screw lift 3223 to achieve vertical drive. The turbine screw lift 3223 body is arranged in the housing 3211, and passes through the hole of the lower bottom plate of the housing 3211 to control the lifting and lowering of the interlayer insulation mechanism 32; the interlayer insulation mechanism 32 is also provided with two groups (two in each group, a total of four) of guide rods 3224 passing through the lower bottom plate to fix the chassis 3222, thereby providing a guide for lifting and lowering. A five-position volumetric quantitative oil discharge assembly 3225 is provided on the bottom plate 3221 to ensure that a fixed amount of lubricating oil is provided to each active part each time.

[0123] In this embodiment, the paper tape supply assembly 321 is provided with two groups, and the first group of paper tape supply assembly 321 is installed on the chassis assembly 322. Fig.12 and Fig.13 As shown, the second set of paper tape supply components 321 is movably installed on the top of the first set of paper tape supply components 321 along the axial direction of the coil mold 4, as shown in FIG. Fig.10 and Fig.11 As shown, the overlapping degree of the insulating paper tape 6 supplied by the two paper tape supply assemblies 321 in the width direction is adjusted. Specifically, two sets of linear guides and square sliders are placed front and back on the opposite surfaces of the shell 3211 of the two paper tape supply assemblies 321 to form a sliding pair to achieve a movable connection. The motion drive in the linear direction can be realized by using a rack and pinion meshing transmission. For example, there is a straight rack under the bottom plate of the paper tape supply assembly 321 located at the top, which is meshed with an active gear, and the active gear is connected to the reducer and the servo motor to control the dislocation movement of the upper and lower paper tape supply assemblies 321. The transmission structure of the insulating paper tape reel inside the two paper tape supply assemblies 321 is the same (i.e., an inflatable shaft, a toothed belt wheel, etc.).

[0124] The two sets of paper tape supply components 321 are controlled by independent servo systems (second control unit), and can also achieve 50% to 100% overlap of the two layers of insulating paper tape in the width direction to meet the quality requirements of the insulation system, and can also be used alone; the front and rear positions of the paper tape supply components 321 can also be adjusted by the chassis component 322 so that they are 100mm-150mm outside the maximum turning radius of the coil to prevent interference collision due to being too close, and to avoid the lag effect caused by the paper tape cantilever being too long due to being too far away.

[0125] In general, when arranging the interlayer insulation, the paper tape cross-sectional area, the required thickness of the first and last layers, and the paper discharge height can be calculated to control the travel coordinates of the paper tape mechanism at different angles. When the tension (tension adjustment part) is not turned on during winding, the unwinding shaft is locked, and the paper tape can be dragged when the tension is turned on. The paper tape unwinding speed can be adjusted by the incremental encoder (which can be connected to the rubber roller) and the number of revolutions to adjust the roll diameter.

[0126] In this embodiment, in order to ensure that the positions where the two layers of insulating paper tape are output from the two sets of paper tape supply components 321 are as close as possible, the housings 3211 of the two sets of paper tape supply components 321 are both provided with extension arms 3219, and the ends of the extension arms 3219 of the two sets of paper tape supply components 321 are adjacent to each other, and the ends are both provided with guide wheels 3214 for guiding the output insulating paper tape. The four paper tape guide wheels 3214 at the extension arms 3219 of the two sets of paper tape supply components 321 can be installed at the extension arms 3219 by using cylinders 32191, and the four paper tape guide wheels 3214 are grouped in pairs, and the cylinders 32191 are used to drive them to move relatively close and away to achieve paper tape clamping. Four buttons 32192 are provided to control the extension and retraction of the cylinders 32191 of each guide wheel 3214, respectively, to clamp and release the paper tape accordingly.

[0127] In this embodiment, in addition to the end insulation mechanism and the interlayer insulation mechanism, the paper supply device 3 can also be provided with a wide-width paper insulation mechanism 33. The wide-width paper insulation mechanism 33 can be installed on the base 8, and can be used to supply wide-width paper to the coil mold 4 and cut wide-width paper, etc., and can also manually wind the coil mold 4 with wide-width paper. As an addable option, it is not described in detail in this embodiment.

[0128] In this embodiment, the coil driving device 1 includes a spindle box 11 and a tailstock box 12, and a chuck 13 is provided on each of the spindle box 11 and the tailstock box 12. The spindle box 11 and the tailstock box 12 clamp the two ends of the coil mold 4 through the chuck 13, respectively. A spindle driving member 14 is provided in the spindle box 11, which is used to drive the chuck 13 on the spindle box 11 to rotate, so as to drive the coil mold 4 to rotate, and to make the chuck 13 on the tailstock box 12 rotate with it. The chuck 13 on the tailstock box 12 is connected to the tailstock box 12 in the form of free rotation, that is, no rotation drive is provided, so that only clamping and following are performed. The chuck 13 specifically adopts a four-claw chuck structure. The spindle box 11 and the tailstock box 12 can be connected to the base 8 through a sliding pair combined with a linear drive device to achieve axial movement along the coil mold 4. The coil is moved up and down and turned over in a centrally symmetrical manner, that is, the spindle box 11 and the tailstock box 12 are respectively away from or close to the coil mold 4 along the slide rail, thereby providing basic guarantees for the expansion and contraction of the spindle (clamping and fixing) and the rotation of the coil by 180° (coil turning over).

[0129] like Fig. 20 As shown, a spindle drive 14 is arranged in the box body of the spindle box 11, and a lifting bolt 112 is arranged on the top for lifting. The rotating spindle of the spindle box 11 passes through the box body, the outer end is connected to the chuck 13, and the inner end is connected to the spindle drive 14, which can be driven by a pulley, a synchronous belt, etc. The specific driving method, connection structure, etc. are relatively conventional, so they are not described here. When the coil is wound, the tailstock box 12 has no active driving force and only follows.

[0130] In this embodiment, the winding machine also includes an electrical control box 7 and a base 8. The spindle box 11 and the tailstock box 12 are movably installed on the base 8 along the axial direction of the coil mold 4 so as to be able to move toward or in the opposite direction. The wire arranging device 2 and the paper feeding device 3 are both arranged on the same side of the connecting line of the spindle box 11 and the tailstock box 12, opposite to the interval between the spindle box 11 and the tailstock box 12 for installing the coil mold 4, and are installed on the base 8, and the wire arranging device 2 is arranged astride the paper feeding device 3. The electrical control box 7 is installed on the base 8, located on the side of the spindle box 11 away from the tailstock box 12, and is used to control the operation of the spindle box 11, the wire arranging device 2 and the paper feeding device 3 and supply power. The wire pay-off frame mechanism 24 is arranged on the side of the wire arranging frame mechanism 22 away from the coil driving device 1, and moves synchronously with the wire arranging frame mechanism 22.

[0131] In this layout, the operator faces the pay-off mechanism 24, and the wire 5 is wound in front of the operator and enters the coil mold 4. The operator can face the winding machine, the spindle box 11 and the electrical control box 7 are arranged on the left, the coil mold and the main operating mechanism (interlayer insulation mechanism 32, wire mechanism 23) are located in front of the operator, and an auxiliary tool box can be set on the right. The overall layout is U-shaped, which is convenient for manual operation. The main labor in the winding process is monitoring, and only appropriate adding and releasing operations are required (such as winding of end insulation).

[0132] To be more specific, the pay-off frame mechanism 24 is arranged on the side of the base 8 away from the coil mold 4 (this direction is set to be behind the base 8), and the pay-off frame mechanism 24 is parallel to the base 8, the main shaft box 11 and the tail frame box 12 are arranged on both sides of the front of the base 8, the electrical control box 7 is arranged on the left side of the rear, and the interlayer insulation mechanism 32 and the wide paper insulation mechanism 33 are arranged in the middle, and the wire arrangement frame mechanism 22 is arranged above the two to drive the wire mechanism 23, the reverse bending mechanism 21, and the end insulation mechanism 31 to move.

[0133] In general, the transformer layer coil winding machine of this embodiment can be used in transformer manufacturing and coil winding technology fields, and is suitable for the winding of all layer coils, especially for the control of coil size when winding non-circular coils, and material saving is of great significance. The winding machine as a whole includes a winding machine base 8, a coil driving device 1 (including a spindle box 11 and a tail frame box 12), a paper supply device 3 (including an end insulation mechanism 31, an interlayer insulation mechanism 32, and a wide paper insulation mechanism 33), a wire arrangement device 2 (including a wire arrangement frame mechanism 22, a reverse bending mechanism 21, a wire mechanism 23, and a wire release frame mechanism 24), and an electrical control box 7. The spindle box 11, the tail frame box 12, the interlayer insulation mechanism 32, the wide paper insulation mechanism 33, the wire arrangement frame mechanism 22, and the wire mechanism 23 are installed on the winding machine base 8.

[0134] In this embodiment, when the coil winding starts, the spindle drive 14 in the spindle box 11 is started, and the coil mold can be driven to rotate by a transmission method such as a pulley. The tailstock box 12 is unpowered during winding, and the end is also an expansion and contraction type four-claw chuck 13 combined with the coil mold 4 to fix it. The four-claw chuck 13 is used to fix the coil in an expansion and contraction manner, and the coil can be loaded and unloaded by a crane.

[0135] The interlayer insulation is wound with strip paper tape, which forms trapezoidal insulation through motion synthesis (the rotational motion of the coil mold and the lateral motion of the interlayer insulation mechanism 32). The wire and paper are wound at the same time, which improves the winding efficiency and reduces the cost of insulation materials. A tension control system based on cylinder buffering is used when winding the paper tape.

[0136] The wire winding can also be combined with the existing tension adjustment mechanism, and a follow-up reverse bending mechanism 21 is added to apply prestress to the wire to offset the elastic restoring force generated by the bending of the wire, so that the internal stress of the wire is equal on the long and short axis sides of the oblong coil, and the internal pressure of the wire on the long and short axis sides of the non-circular coil is balanced, so that the oblong coil is more compact during winding and the rebound phenomenon after winding is reduced. The reverse bending degree of the wire can be adjusted, and the wire is reversely bent in advance, and additional radial force is added to the short axis side of the non-circular coil after forward winding.

[0137] By adopting the winding machine of this embodiment, the winding action and interlayer insulation process are currently automated to the greatest extent possible, and can realize functions such as automatic winding, conductor transposition, automatic layer lifting, radial dimension control, automatic interlayer insulation winding, and automatic length measurement. Some operations such as the start and end of winding, the start of interlayer insulation broken tape, fixed end insulation spacers, and tapping require manual operation. After the product is wound, it has the same or better performance as manual winding and meets the dimensional tolerance requirements of the coil. The position of each mechanism can be fed back by the absolute encoder. The position coordinates are compared with the predetermined position instructions by the PLC and other controls, and control instructions are generated to drive each motor and detect faults or abnormal movements, and adjust its position and speed in real time. When adjusting the position, the horizontal position of each mechanism is set to the midpoint of the base 8 as the zero position for positive and negative movement, and the vertical movement is adjusted up and down based on the set zero position (preset value).

[0138] The first control unit, the second control unit, ... the nth control unit, etc. of the winding machine can be integrated into a control system in an electrical control box 7. The control system can be combined with an industrial control touch screen to display the industrial control program screen, which can include the following information:

[0139] Main screen: ① Real-time winding information: number of turns, number of layers, number of meters, paper line travel coordinates;

[0140] ②Paper tape conductor parameters: tension, coil diameter;

[0141] ③Switch control: paper line tension, clamping device;

[0142] ④Mechanism position adjustment: paper line, wide paper, no weft belt winding mode;

[0143] Manual screen: The module area is divided into the main shaft box 11, the wire mechanism 23, the interlayer insulation mechanism 32, the wide paper insulation mechanism 33, and the wire rack mechanism 24. Each mechanism can control the translation of different axes and the clamping, loosening, extension and retraction of the cylinder, and can set the initial position and calibrate the zero position.

[0144] Auxiliary programs can also be set in the control system. For example, when the coil is reversed and the winding is completed and the coil needs to be lifted out by a crane, the program can be set to move the wire arrangement device 2, the interlayer insulation mechanism 32 (paper tape), and the wide paper insulation mechanism 33 (whole paper) to the right limit position for avoidance. After winding a coil, each mechanism can be reset to the initial position (such as aligning the left end of the coil) by one key during program setting. At the same time, the rotary shaft (spindle) on the spindle box 11 can be rotated to a set angle to align with the square hole angle of the coil mold to facilitate the coil to get on and off the machine and adapt to the winding of the new coil.

[0145] 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 transformer layer coil winding machine, characterized in that: It comprises a coil driving device (1), a wire arrangement device (2) and a paper supply device (3), The coil driving device (1) is connected to the coil mold (4) and drives the coil mold (4) to rotate, so that the conductor (5) and the insulating paper tape (6) are wound on the coil mold (4) by rotating and winding. The wire arrangement device (2) and the paper supply device (3) are respectively used to supply the wire (5) and the insulating paper tape (6) to the coil driving device (1), and are capable of moving relative to the coil driving device (1) along the axial direction of the coil mold (4) so ​​that the wire (5) and the insulating paper tape (6) are wound on the coil mold (4) along the axial direction of the coil mold (4).

2. The transformer layer coil winding machine according to claim 1, characterized in that: The wire arrangement device (2) comprises a reverse bending mechanism (21), and the reverse bending mechanism (21) comprises a guide wheel (211). The guide wheel (211) 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 (211) 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).

3. The transformer layer coil winding machine according to claim 2, characterized in that: The reverse bending mechanism (21) further comprises an adjustment component (212), The guide wheel (211) 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 wire (5) is wound from the side of the guide wheel (211) away from the coil mold (4) to the bottom of the guide wheel (211) and then wound from the top of the coil mold (4) to the side of the coil mold (4) away from the guide wheel (211). The adjustment component (212) is connected to the guide wheel (211) and can drive the guide wheel (211) to rise and fall so as to move relative to the coil mold (4), thereby adjusting the degree of bending that can be achieved by the wire (5) after being supported by the guide wheel (211).

4. The transformer layer coil winding machine according to claim 3, characterized in that: The reverse bending mechanism (21) further comprises a first control unit, wherein the first control unit is electrically connected to the adjustment component (212) and the coil driving device (1). It is used to control the adjustment component (212) to drive the guide wheel (211) to move up and down along with the rotation of the coil mold (4), so that: When the guide wheel (211) is at the upper limit of the travel, the conductor (5) at the tangent point to the guide wheel (211) reaches the coil mold (4) and is wound around the long axis vertex M of the coil mold (4); When the guide wheel (211) is at the lower limit of the stroke, the conductive wire (5) at the tangent point to the guide wheel (211) reaches the coil mold (4) and is wound around the short axis vertex N of the coil mold (4).

5. The transformer layer coil winding machine according to claim 2, characterized in that: The wire arrangement device (2) further comprises a wire arrangement frame mechanism (22) and a wire guide mechanism (23). The wire rack mechanism (22) comprises a support assembly (221) and a mounting plate (222), wherein the mounting plate (222) is movably connected to the support assembly (221) along the axial direction of the coil mold (4). The wire guide mechanism (23) and the reverse bending mechanism (21) are both mounted on a mounting plate (222), and are supported by the mounting plate (222) to move synchronously in the axial direction relative to the coil mold (4).

6. The transformer layer coil winding machine according to claim 5, characterized in that: The wire guiding mechanism (23) comprises a guide wheel mounting plate (231) and a wire arranging wheel (232). The guide wheel mounting plate (231) is connected to the mounting plate (222). The axial direction of the wire arrangement wheel (232) is parallel to the axial direction of the coil mold (4), and is rotatably connected to the guide wheel mounting plate (231). The reverse bending mechanism (21) is connected to the guide wheel mounting plate (231). The wire (5) supplied by the pay-off frame mechanism (24) passes around the wire arrangement wheel (232) and is then introduced into the reverse bending mechanism (21) and finally reaches the coil mold (4).

7. The transformer layer coil winding machine according to claim 5, characterized in that: The paper feeding device (3) comprises an end insulating mechanism (31), The end insulation mechanism (31) comprises an end insulation box (311) and a cylinder. The end insulation box (311) is movably mounted on the mounting plate (222) and is located on the side of the conductor mechanism (23). The cylinder connection end insulating box (311) is used to drive the end insulating box (311) to move so as to be able to approach and move away from the coil mold (4).

8. The transformer layer coil winding machine according to claim 1, characterized in that: The paper supply device (3) comprises an interlayer insulation mechanism (32), and the interlayer insulation mechanism (32) comprises a paper tape supply component (321). The paper tape supply assembly (321) comprises a housing (3211), an unwinding shaft (3212) and an unwinding driving member (3213). The unwinding driving member (3213) is disposed in the housing (3211). The unwinding shaft (3212) is rotatably connected to the outer surface of the housing (3211), and the end of the unwinding shaft (3212) passes through the housing (3211) and is connected to the driving end of the unwinding driving member (3213). The unwinding shaft (3212) is connected to a paper tape reel wound with an insulating paper tape (6), so that it rotates under the drive of the unwinding driving member (3213) and supplies the insulating paper tape (6) to the coil mold (4) to form interlayer insulation on the coil mold (4).

9. The transformer layer coil winding machine according to claim 8, characterized in that: The paper tape supply assembly (321) further comprises a tension adjusting member, wherein the tension adjusting member comprises a swing rod (3215), a pneumatic floating rod (3216) and a guide wheel (3214). The shell of the pneumatic floating rod (3216) is hinged on the outer surface of the housing (3211), and the driving rod of the pneumatic floating rod (3216) is connected to the end of the rocker rod (3215). The end of the swing rod (3215) connected to the driving rod is provided with a rotatable guide wheel (3214), and the other end is hinged to the outer surface of the housing (3211). The insulating paper tape (6) is drawn out from the paper tape reel on the unwinding shaft (3212), passes around the guide wheel (3214), and is then wound onto the coil mold (4), so as to be automatically tensioned under the support of the pneumatic floating rod (3216).

10. The transformer layer coil winding machine according to claim 9, characterized in that: A first sensor is connected to the end of the swing rod (3215) hinged to the outer surface of the housing (3211) to sense the position of the swing rod (3215). The paper tape supply component (321) is also provided with a second sensor for sensing the supply length of the insulating paper tape (6). The paper tape supply assembly (321) further comprises a third control unit, wherein the third control unit is electrically connected to the unwinding drive member (3213), the first sensor and the second sensor. It is used to obtain the real-time winding diameter of the paper tape reel based on the second sensor and the initial winding diameter of the paper tape reel, and to control the rotation speed of the unwinding drive (3213) to drive the unwinding shaft (3212) based on the real-time winding diameter and the position sensed by the first sensor, so as to keep the winding tension of the insulating paper tape (6) within a set range.

11. The transformer layer coil winding machine according to claim 8, characterized in that: The paper tape supply assembly (321) further comprises a guide wheel (3214), wherein a plurality of guide wheels (3214) are provided and all of them are rotatably connected to the outer surface of the housing (3211). The insulating paper tape (6) is drawn out from the paper tape reel on the unwinding shaft (3212), passes around each guide wheel (3214), and is then wound onto the coil mold (4).

12. The transformer layer coil winding machine according to any one of claims 8 to 11, characterized in that: The interlayer insulation mechanism (32) further includes a chassis assembly (322), a transverse driving member (323) and a second control unit. The paper tape supply assembly (321) is mounted on a chassis assembly (322). The transverse driving member (323) is connected to the chassis assembly (322) and drives the chassis assembly (322) to drive the paper tape supply assembly (321) to move axially along the coil mold (4); The second control unit is electrically connected to the transverse driving member (323) and the coil driving device (1), respectively. It is used to control the transverse driving member (323) to drive the chassis assembly (322) to drive the paper tape supply assembly (321) to move according to the number of turns driven by the coil driving device (1) to rotate the coil mold (4), so as to: The paper tape supply assembly (321) moves from the head end to the tail end relative to the interlayer insulation area on the coil mold (4), thereby winding the insulating paper tape (6) from the head end to the tail end of the interlayer insulation area of ​​the coil mold (4) to form the interlayer insulation of the current layer, and, The paper tape supply assembly (321) moves in the opposite direction from the tail end of the interlayer insulation area of ​​the coil mold (4) to lead the insulating paper tape (6) from the tail end of the interlayer insulation area of ​​the coil mold (4) to the next layer, so that the insulating paper tape (6) can be wound to form the next layer of interlayer insulation.

13. The transformer layer coil winding machine according to claim 12, characterized in that: The second control unit is used to control the distance that the transverse driving member (323) drives the chassis assembly (322) to drive the paper tape supply assembly (321) to move axially relative to the coil mold (4) according to the number of turns of rotation driven by the coil driving device (1) to drive the coil mold (4), so as to form interlayer insulation with a trapezoidal cross section on the coil mold (4) through the following calculation formula: Wherein, k is the distance that the paper tape supply assembly (321) moves horizontally from the head end to the tail end along the axial direction of the coil mold (4) when the coil mold (4) rotates the nth turn, h1 is the closed thickness of the trapezoidal interlayer insulation, h2 is the open thickness of the trapezoidal interlayer insulation, L is the width of the interlayer insulation area, H 绝 is the cross-sectional thickness of the insulating paper tape (6), W 绝 is the cross-sectional width of the insulating paper tape (6).

14. The transformer layer coil winding machine according to claim 12, characterized in that: The paper tape supply assembly (321) is provided with two groups, the first group of paper tape supply assemblies (321) is installed on the chassis assembly (322), The second group of paper tape supply components (321) is movably installed on the top of the first group of paper tape supply components (321) along the axial direction of the coil mold (4) to adjust the overlapping degree of the insulating paper tapes (6) supplied by the two groups of paper tape supply components (321) in the width direction.

15. The transformer layer coil winding machine according to claim 1, characterized in that: The coil driving device (1) comprises a main spindle box (11) and a tailstock box (12), wherein the main spindle box (11) and the tailstock box (12) are both provided with a chuck (13). The main shaft box (11) and the tailstock box (12) are respectively clamped and connected to the two ends of the coil mold (4) through the chuck (13). The spindle box (11) is provided with a spindle driving member (14) for driving a chuck (13) on the spindle box (11) to rotate, thereby driving the coil mold (4) to rotate and causing the chuck (13) on the tailstock box (12) to rotate accordingly.

16. The transformer layer coil winding machine according to claim 15, characterized in that: It also includes an electrical control box (7) and a base (8), The spindle box (11) and the tailstock box (12) are movably mounted on the base (8) along the axial direction of the coil mold (4) so ​​as to be able to move toward or in opposite directions. The wire arrangement device (2) and the paper supply device (3) are both arranged on the same side of the connection line between the main shaft box (11) and the tail frame box (12), opposite to the interval between the main shaft box (11) and the tail frame box (12) for installing the coil mold (4), and are installed on the base (8), and the wire arrangement device (2) is arranged across the paper supply device (3). The electrical control box (7) is installed on the base (8) and is located on a side of the main spindle box (11) away from the tailstock box (12), and is used to control the operation of the main spindle box (11), the wire arrangement device (2) and the paper supply device (3) and supply power.

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