A process system for wrapping tape around the core of a pulse transformer

Abstract

This invention discloses a tape wrapping process system for the outer periphery of a pulse transformer core, comprising a translation arm (a), a translation arm (b), a translation arm (c), a tape crossing wheel, and an insulating tape lead-out from a tape storage roll; the translation arms (a), (b), and (c) can all actively perform horizontal displacement under the action of a displacement device; a rotary platform driver with its output shaft vertically upward is fixedly installed at the end of the translation arm (a), a rotary table is synchronously mounted coaxially on the output shaft of the rotary platform driver, a transformer clamp is installed at the geometric center of the rotary table, and the transformer clamp can clamp the lower end of the coil frame of the transformer to be wrapped with tape, the outer periphery of the core of the transformer to be wrapped with tape clamped by the transformer clamp is the circumferential surface to be wrapped with tape; effectively preventing the phenomenon of tail lifting.

Description

Technical Field

[0001] This invention belongs to the field of transformer manufacturing. Background Technology

[0002] Pulse transformer composition

[0003] 1. Frame: The fixed frame that supports the product and also enhances insulation.

[0004] 2. Magnetic core: generates magnetic field and transfers energy.

[0005] 3. Coil: Enables product performance.

[0006] 4. Insulating tape: Enhances insulation and improves product safety.

[0007] 5. Epoxy adhesive: an adhesive used to fix the magnetic core and the frame.

[0008] 6. Anaerobic adhesive: Used to bond magnetic cores together.

[0009] Existing equipment for wrapping the outer periphery of pulse transformer cores with insulating tape typically uses a single-arm robotic arm in conjunction with a tape feeding mechanism for automated wrapping. This makes it difficult to ensure precise consistency in the initial bonding position each time, leading to deviations in the number of subsequent wrapping layers. Cutting the tape often employs independent pneumatic or electric shearing mechanisms, requiring an additional pause after wrapping for cutting, impacting cycle efficiency and resulting in uneven cuts and irregularly shaped residual tape ends. The finishing section is particularly simple, usually relying only on brief pressure from a clamping block. Due to the tape's elastic memory effect, it is highly susceptible to curling or weak adhesion after the pressure is released. Over prolonged use, the insulation layer may peel off from the ends, severely affecting the long-term reliability of the transformer. Therefore, existing equipment struggles to balance wrapping quality and production efficiency, failing to meet the requirements of high-end transformers for insulation layer consistency and stability. Summary of the Invention

[0010] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a process system for wrapping tape around the magnetic core of a pulse transformer, which effectively prevents the phenomenon of tail lifting.

[0011] Technical solution: To achieve the above objectives, the present invention provides a tape wrapping process system for the outer periphery of the magnetic core of a pulse transformer, comprising a translation arm, b translation arm, c translation arm, tape crossing wheel, and insulating tape drawn out from tape storage roll;

[0012] Translation arms a, b, and c can all actively perform horizontal displacement under the action of the displacement device;

[0013] A rotary platform driver with its output shaft pointing vertically upward is fixedly installed at the end of a translation arm. A rotary table is synchronously installed on the output shaft of the rotary platform driver. A transformer clamp is installed at the geometric center of the rotary table. The transformer clamp can clamp the lower end of the coil frame of the transformer to be wrapped with tape. The outer circumferential surface of the magnetic core of the transformer to be wrapped with tape, which is clamped by the transformer clamp, is the circumferential surface to be wrapped with tape.

[0014] b. A tape adsorption block is fixedly connected to the end of the translation arm, and one side of the tape adsorption block is a strip tape adsorption plane.

[0015] The end of the tape adsorption block that is away from the tape and crosses the wheel is rotatably mounted with a roller with a vertical axis via a roller support;

[0016] c. The end of the translation arm is fixed with an upwardly extending clamp.

[0017] Furthermore, the tape adsorption surface is evenly distributed with several negative pressure adsorption holes, which are connected to the negative pressure chamber inside the tape adsorption block. It also includes a negative pressure pump that can pump air from the negative pressure chamber inside the tape adsorption block.

[0018] Furthermore, the roller shaft is rotatably mounted in the bearing hole on the roller support via a bearing.

[0019] Furthermore, tape constraint strips are provided along the contour at both the upper and lower edges of the strip tape adsorption plane. The width between the two tape constraint strips is the same as the width of the insulating tape. A section of insulating tape that is adsorbed parallel to the strip tape adsorption plane is constrained parallel between the two tape constraint strips.

[0020] Furthermore, the clamping rod surface has an anti-stick coating.

[0021] Furthermore, the insulating tape is drawn from the tape storage roll, passes over the wheel, and then passes between the clamping bar and the tape adsorption block, with the end of the insulating tape adsorbed parallel to the strip tape adsorption plane.

[0022] The insulating tape passing between the clamp and the tape adsorption block has an adhesive side near the clamp and an unadhesive side near the tape adsorption block.

[0023] Furthermore, a portion of the outer circumferential surface of the roller is provided with sharp protrusions parallel to the axial direction; the two sides of the roller support are respectively the first limiting side and the second limiting side; the upper end of the roller is provided with a limiting protrusion a and a limiting protrusion b; it also includes a torsion spring that applies a clockwise torque to the roller from a top-view perspective. In the initial state, under the torsion of the torsion spring, the limiting protrusion b is limited to contacting the first limiting side, and the second limiting side maintains a distance from the limiting protrusion b.

[0024] Furthermore, the tape storage roll can be adapted to lead out or retract the insulating tape while ensuring that the drawn-out insulating tape is always under relative tension.

[0025] Furthermore, the insulating tape is wrapped around the outer circumference of the transformer core with n turns, forming a wrapping around the circumferential surface of the core. The connection between the wrapping and the insulating tape forms a transition section of the tape.

[0026] Based on the above, a translation arm moves the transformer that has been coated with rubber to a predetermined position, and b translation arm moves the tape adsorption block and roller to a predetermined position, so that the roller rolls the beginning part of the tape transition section at the connection between the rubber coating and the insulating tape onto one side of the transformer core. There is a longitudinal virtual dividing line on the tape transition section, which is exactly at the tangent point between the tape transition section and the roller. In this state, the longitudinal virtual dividing line and the sharp protruding edge of the outer circumference of the roller are not coincident.

[0027] Based on the above, control either translation arm a or translation arm b to make the rollers roll relative to each other along the length of one side of the magnetic core. This allows the rollers to gradually roll and bond the transition section of the tape to one side of the magnetic core. During the rolling process, the relative position of the longitudinal virtual dividing line and the roller axis remains unchanged. Furthermore, the rollers themselves will rotate counterclockwise from a top-down perspective during the rolling process, causing the sharp protrusions on the outer circumference of the rollers to gradually rotate until they coincide with the longitudinal virtual dividing line. When the sharp protrusions on the outer circumference of the rollers just happen to coincide with the longitudinal virtual dividing line, the transition section of the tape is cut off by the sharp protrusions. At the same time, the first limiting side comes into contact with the limiting protrusion a, preventing the rollers from continuing to rotate counterclockwise. Subsequently, the rollers continue to slide and roll the remaining half of the tape transition section and bond it to the side of the magnetic core in a non-rolling sliding manner. The remaining half of the tape transition section is left at the end of the insulating tape.

[0028] Beneficial effects: This invention utilizes the coordinated action of three independently XY-displaceable translation arms (a, b, and c) combined with a rotary table to precisely adjust the magnetic core angle, ensuring that the starting end of the tape is stably attracted and clamped to the side of the magnetic core. Subsequently, the rotary table drives the magnetic core to rotate, completing multi-layer wrapping. After wrapping, rollers are used to roll the transition section to the side of the magnetic core. During the rolling process, the rollers rotate counterclockwise due to friction, and their sharp outer edges gradually coincide with the virtual dividing lines, achieving automatic and precise cutting of the tape. At the same time, the limiting protrusions and limiting sides cooperate to prevent the protruding edges from excessively rotating and damaging the magnetic core. After cutting, the rollers continue to roll the remaining tape section in a sliding manner, ensuring a firm finish without any curling. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the process from "Step One" to "Step Three";

[0030] Figure 2 This is a schematic diagram of the process from "Step Four" to "Step Six";

[0031] Figure 3 This is a schematic diagram of a partial three-dimensional structure of the tape adsorption block;

[0032] Figure 4 for Figure 3 Top view;

[0033] Figure 5 This is a schematic diagram of the local state at the end of step six. Detailed Implementation

[0034] The invention will now be further described with reference to the accompanying drawings.

[0035] like Figures 1 to 5 The illustrated pulse transformer core outer periphery tape wrapping process system includes a translation arm 10, a translation arm 3, a translation arm 14, a tape crossing wheel 1, and an insulating tape 6 drawn from a tape storage roll. Translation arms 10, 3, and 14 can all actively perform horizontal XY displacement under the action of a displacement device. Each translation arm is driven by an independent displacement mechanism, enabling high-precision planar motion and providing a foundation for precise alignment and coordinated actions at subsequent workstations.

[0036] A translation arm 10 is fixedly mounted at its end with a vertically upward-facing rotary platform driver 11. A rotary table 9 is synchronously mounted on the output shaft of the rotary platform driver 11. A transformer clamp 8 is mounted at the geometric center of the rotary table 9. The transformer clamp 8 can clamp the lower end of the coil frame of the transformer 70 to be wrapped with tape. The outer circumferential surface of the magnetic core 7 of the transformer 70 to be wrapped with tape, which is clamped by the transformer clamp 8, is the circumferential surface 7a to be wrapped with tape.

[0037] The end of the translation arm 3 is fixedly connected to a tape adsorption block 24. One side of the tape adsorption block 24 is a strip tape adsorption plane 2. Several negative pressure adsorption holes 20 are evenly distributed on the tape adsorption plane 2. Several negative pressure adsorption holes 20 are connected to the negative pressure chamber inside the tape adsorption block 24. It also includes a negative pressure pump that can pump air from the negative pressure chamber inside the tape adsorption block 24.

[0038] The tape adsorption block 24 is mounted on a roller 5 with a vertical axis at one end of the tape across the wheel 1 via a roller support 4. The roller shaft 17 of the roller 5 is rotatably mounted in the bearing hole on the roller support 4 via a bearing.

[0039] The upper and lower edges of the strip tape adsorption plane 2 are both provided with tape constraint bars 12 along the contour. The width between the two tape constraint bars 12 is the same as the width of the insulating tape 6. The tape constraint bars 12 can prevent the insulating tape 6 adsorbed on the strip tape adsorption plane 2 from longitudinally slipping, ensuring that the tape is always in the correct position during the conveying and adsorption process, and improving the alignment accuracy of subsequent processes.

[0040] The end of the translation arm 14 is fixed with an upwardly extending clamping rod 13. The surface of the clamping rod 13 has an anti-stick coating, such as a silicone oil layer, a paraffin layer, or a release layer. The anti-stick coating can prevent the adhesive side of the insulating tape 6 from sticking to the clamping rod 13, ensuring that the clamping rod 13 can be smoothly released after clamping the tape, and preventing the tape from being accidentally pulled up.

[0041] Insulating tape 6 is drawn from the tape storage roll, passes over tape wheel 1, and then passes between clamping bar 13 and tape adsorption block 24. The end of insulating tape 6 is adsorbed parallel to the strip tape adsorption plane 2. The section of insulating tape 6 adsorbed parallel to the strip tape adsorption plane 2 is constrained parallel between the two tape constraint bars 12. The side of insulating tape 6 that passes between clamping bar 13 and tape adsorption block 24 is the adhesive side, and the side that passes near tape adsorption block 24 is the non-adhesive back side.

[0042] A portion of the outer circumferential surface of the roller 5 is provided with a sharp protruding edge 25 parallel to the axial direction; the two sides of the roller support 4 are respectively a first limiting side 4a and a second limiting side 4b; the upper end of the roller 5 is provided with a limiting protrusion 19 (a) and a limiting protrusion 18 (b); it also includes a torsion spring 16 that applies a clockwise torque to the roller 5 from a top-view perspective. In the initial state, under the torque of the torsion spring 16, the limiting protrusion 18 (b) is limited to contacting the second limiting side 4b, and the first limiting side 4a maintains a distance from the limiting protrusion 19 (a); the torsion spring 16 provides a continuous reset torque, so that the roller 5 maintains its initial angle in the non-working state, ensuring that the sharp protruding edge 25 is in a safe position. The cooperation between the limiting protrusion and the limiting side precisely controls the rotation range of the roller, preventing the protruding edge from rotating excessively and damaging the side of the transformer core.

[0043] Working principle:

[0044] Step 1: In the initial state, insulating tape 6 is drawn from the tape storage roll, passes over tape passing roller 1, and then passes between clamping bar 13 and tape adsorption block 24, with the end of insulating tape 6 adsorbed parallel to the strip tape adsorption plane 2. To improve the stability of the drawn-out end of insulating tape 6, the translation arm 14 is controlled to move the clamping bar 13 gradually closer to the tape adsorption block 24 until a portion of the insulating tape 6 is clamped between the end of the strip tape adsorption plane 2 furthest from roller 5 and the clamping bar 13. At this point... Figure 1 As shown in the image above;

[0045] Step two: By precisely controlling the rotation of the rotary table 9, when any plane of the circumferential adhesive-coated surface 7a on the outer periphery of the magnetic core 7 of the clamped transformer 70 is parallel to the strip tape adsorption plane 2, the rotation of the rotary table 9 is paused; then, the translation arm 10 is controlled to move the clamped transformer 70 closer to the tape adsorption block 24 until the end of the insulating tape 6, which is adsorbed by the strip tape adsorption plane 2, is tightly clamped between the strip tape adsorption plane 2 and the circumferential adhesive-coated surface 7a on one side of the clamped transformer 70. Under the action of the clamping force, the adhesive surface of the clamped part of the insulating tape 6 is stably bonded to the circumferential adhesive-coated surface 7a on one side of the clamped transformer 70; at this time, if... Figure 1 The middle image shows that the tape is bonded to the side of the magnetic core by actively moving the transformer, which avoids the complexity of the tape moving mechanism in the traditional method. At the same time, the clamping pressure is used to ensure the initial bonding strength, which establishes a good starting point for subsequent wrapping.

[0046] Step 3: First, release the negative pressure adsorption force of the negative pressure adsorption holes 20 on the adsorption plane 2 of the strip tape. Then, control the translation arms 3 (b) and 14 (c) respectively to make the tape adsorption block 24 and the clamping rod 13 move away from each other, so that both the tape adsorption block 24 and the clamping rod 13 are detached from the insulating tape 6; at this time, as Figure 1 The image below;

[0047] In the subsequent process, the tape storage roll adaptably leads out or retracts the insulating tape 6 while ensuring that the drawn-out insulating tape 6 is always under relative tension; tension control ensures that the tape is always properly tensioned during the wrapping process, so that it will not wrinkle due to being too loose, nor break or damage the magnetic core due to being too tight.

[0048] Step four, control the translation arm 10 to make the clamped transformer 70 move away from the roller 1. The end of the insulating tape 6 follows the clamped transformer 70 under the action of adhesive force. At this time, as... Figure 2 As shown in the figure above, the purpose of this step is to avoid motion interference when the clamped transformer 70 rotates in the next step; by moving the transformer away from the tape across the wheel in advance, space is made for the subsequent rotation and wrapping, ensuring that the tape will not get tangled or rub against other parts during the rotation.

[0049] Step 5: The rotary platform driver 11 drives the rotary table 9 to rotate clockwise n times from a top-down perspective; thus, the insulating tape 6 wraps around the outer circumference of the magnetic core 7 of the transformer 70 n times, forming a wrapping 6a around the circumferential adhesive surface 7a of the magnetic core 7; at this time, as... Figure 2As shown in the diagram, the number of rotations, n, can be set according to actual needs to achieve multi-layer wrapping and meet different insulation requirements. During rotation, the tape storage roll is released in conjunction with the tape release to maintain constant tension and ensure uniform and tight wrapping.

[0050] Step six: Control the translation arm 10 to move the already coated transformer 70 to the predetermined position. Simultaneously, control the translation arm 3 to move the tape adsorption block 24 and roller 5 to the predetermined position. This causes the roller 5 to roll the beginning of the transition section 6b at the connection between the coated 6a and the insulating tape 6 onto one side of the transformer 70's magnetic core 7. At this point, the strip-shaped tape adsorption plane 2 of the tape adsorption block 24 re-attaches and adsorbs the end of the insulating tape 6. At this time, a longitudinal virtual dividing line 15 exists on the transition section 6b, which is exactly tangent to the roller 5. The state at this point is as follows: Figure 2 As shown in the figure below; at this time, the longitudinal virtual dividing line 15 and the sharp protruding edge 25 on the outer circumference of the roller 5 are not coincident, as shown in the figure below. Figure 5 As shown; the longitudinal virtual dividing line 15 is a reference line for the position where the tape will be cut, located at the tangent point between the roller and the tape. Since the sharp protruding blade 25 does not coincide with the dividing line in the initial state, the tape will not be cut immediately when rolling begins, but will be rolled and bonded first to ensure effective adhesion between the transition section and the side of the magnetic core.

[0051] Step 7: Control either translation arm 10 (a) or translation arm 3 (b) to roll roller 5 along the length of one side of the magnetic core 7. This causes roller 5 to gradually roll and bond the transition section 6b of the belt to one side of the magnetic core 7. During the rolling process, the relative position of the longitudinal virtual dividing line 15 and the axis of roller 5 remains unchanged. Furthermore, roller 5 itself will rotate counterclockwise from a top-down perspective during the rolling process, causing the sharp protrusion 25 on the outer circumference of roller 5 to gradually rotate until it coincides with the longitudinal virtual dividing line 15. When the sharp protrusion 25 on the outer circumference of roller 5 just rotates to coincide with the longitudinal virtual dividing line 15... Upon overlap, the transition section 6b of the tape is cut off by the sharp protruding blade 25. Simultaneously, the first limiting side 4a makes contact with the limiting protrusion 19, preventing the roller 5 from continuing to rotate counterclockwise. This avoids the sharp protruding blade 25 from continuing to follow the roller 5 counterclockwise to contact the side of the magnetic core 7. Subsequently, the roller 5 continues to slide and roll the severed half of the tape transition section 6b onto the side of the magnetic core 7 in a non-rolling manner, completing the finishing work of the coating 6a and preventing the coating from becoming loose and "lifting" at the end. This completes the entire coating process for the transformer 70; this step is one of the core innovations of this invention. Through the rolling of the roller, the sharp protruding blade gradually approaches and finally reaches the cutting position during the rolling process, achieving automatic and precise cutting of the tape. After cutting, the roller immediately stops rotating and continues to roll the remaining tape segment in a sliding manner, ensuring that the finishing part is fully compressed and preventing "lifting". This design, which integrates rolling and cutting, simplifies the workflow and improves production efficiency and finished product quality.

[0052] The other half of the tape transition section 6b remains at the end of the insulating tape 6 after being disconnected. Since the length of this half of the tape transition section 6b is very short, it can directly serve as the starting part of the encapsulation in the next encapsulation cycle.

[0053] The moment the aforementioned transition section 6b of the tape is cut by the sharp protruding blade 25, the translation arm 14 is immediately controlled to clamp a portion of the insulating tape 6 between the end of the strip tape adsorption plane 2 away from the roller 5 and the clamping bar 13. This instantaneous clamping action can prevent the end of the tape from shifting due to elastic retraction after cutting, ensuring that the tape position is accurate at the next start.

[0054] Step eight: Control translation arms a (10), b (3), and c (14) to translate to their initial positions respectively; then, transformer clamp 8 releases transformer 70, and the robotic arm removes the coated transformer 70; roller 5 rotates spontaneously under the torque reset force of torsion spring 16, causing limit protrusion b (18) to continuously limit contact with the first limit side 4a, while the second limit side 4b maintains a distance from limit protrusion b (18), returning to the initial state; awaiting the next cycle. The automatic reset function ensures that the equipment can work continuously without manual intervention, improving automation and production efficiency.

[0055] This invention achieves automated wrapping of insulating tape around the outer periphery of a pulse transformer core through the coordinated movement of three translational arms, precise angle adjustment of the rotary table, tape adsorption and clamping mechanism, and rollers with cutting function. Its innovation lies in integrating tape initial fixing, tension control, multi-layer wrapping, and final cutting and pressing into a continuous process. In particular, the rolling cutting and limiting design of the rollers solves the problem of weak finishing in traditional processes, significantly improving wrapping quality and production efficiency.

[0056] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A process system for wrapping tape around the magnetic core of a pulse transformer, characterized in that: Includes a translation arm (10), b translation arm (3), c translation arm (14), tape crossing wheel (1), and insulating tape drawn from tape storage roll (6); The translation arm a (10), translation arm b (3) and translation arm c (14) can all actively perform horizontal displacement under the action of the displacement device; The translation arm (10) is fixedly mounted with a vertically upward-facing rotary platform driver (11) at the end. A rotary table (9) is coaxially and synchronously mounted on the output shaft of the rotary platform driver (11). A transformer clamp (8) is installed at the geometric center of the rotary table (9). The transformer clamp (8) can clamp the lower end of the coil frame of the transformer (70) to be wrapped with tape. The outer circumferential surface of the magnetic core (7) of the transformer (70) to be wrapped with tape clamped by the transformer clamp (8) is the circumferential surface to be wrapped with tape (7a). The end of the translation arm (3) is fixedly connected to a tape adsorption block (24), and one side of the tape adsorption block (24) is a strip tape adsorption plane (2). The tape adsorption block (24) is rotatably mounted with a vertically oriented roller (5) at the end away from the tape crossing wheel (1) via a roller support (4). The end of the c translation arm (14) is fixed with an upwardly extending clamp (13).

2. The tape wrapping process system for the magnetic core of a pulse transformer according to claim 1, characterized in that: Several negative pressure adsorption holes (20) are evenly distributed on the tape adsorption plane (2). The several negative pressure adsorption holes (20) are connected to the negative pressure chamber inside the tape adsorption block (24). It also includes a negative pressure pump that can pump air from the negative pressure chamber inside the tape adsorption block (24).

3. The tape wrapping process system for the magnetic core of a pulse transformer according to claim 1, characterized in that: The roller shaft (17) of the roller (5) is rotatably mounted in the bearing hole on the roller support (4) via a bearing.

4. The tape wrapping process system for the magnetic core of a pulse transformer according to claim 1, characterized in that: The upper and lower edges of the strip tape adsorption plane (2) are provided with tape restraint strips (12) along the contour. The width between the two tape restraint strips (12) is the same as the width of the insulating tape (6). A section of insulating tape (6) that is parallel to the strip tape adsorption plane (2) is parallelly restrained between the two tape restraint strips (12).

5. The tape wrapping process system for the magnetic core of a pulse transformer according to claim 1, characterized in that: The surface of the clamp (13) has an anti-stick coating.

6. The tape wrapping process system for the magnetic core of a pulse transformer according to claim 1, characterized in that: The insulating tape (6) is drawn from the tape storage roll, passes over the tape and the wheel (1), and then passes between the clamp (13) and the tape adsorption block (24), with the end of the insulating tape (6) adsorbed parallel to the strip tape adsorption plane (2). The insulating tape (6) passing between the clamp (13) and the tape adsorption block (24) has an adhesive side near the clamp (13) and an unadhesive side near the tape adsorption block (24).

7. The tape wrapping process system for the magnetic core of a pulse transformer according to claim 6, characterized in that: A portion of the outer circumferential surface of the roller (5) is provided with a sharp protrusion (25) parallel to the axial direction; the two sides of the roller support (4) are respectively the first limiting side (4a) and the second limiting side (4b); the upper end of the roller (5) is provided with a limiting protrusion (19) and a limiting protrusion (18); it also includes a torsion spring (16) that applies a clockwise torque to the roller (5) from a top view. In the initial state, under the torsion of the torsion spring (16), the limiting protrusion (18) is limited to contacting the second limiting side (4b), and the first limiting side (4a) and the limiting protrusion (19) maintain a distance.

8. The tape wrapping process system for the magnetic core of a pulse transformer according to claim 7, characterized in that: The tape storage roll can be adapted to lead out or recycle the insulating tape (6) while ensuring that the drawn-out insulating tape (6) is always in a relatively taut state.

9. The tape wrapping process system for the magnetic core of a pulse transformer according to claim 8, characterized in that: The insulating tape (6) is wrapped around the outer periphery of the magnetic core (7) of the transformer (70) n times, forming a wrapping (6a) that is wrapped around the circumferential adhesive surface (7a) of the magnetic core (7). The connection between the wrapping (6a) and the insulating tape (6) forms a tape transition section (6b). Based on the above, a translation arm (10) drives the transformer (70) that has been coated with rubber to be translated to a predetermined position, b translation arm (3) drives the tape adsorption block (24) and roller (5) to be translated to a predetermined position, so that the roller (5) rolls the starting part of the tape transition section (6b) at the connection between the rubber coating (6a) and the insulating tape (6) on one side of the magnetic core (7) of the transformer (70). There is a longitudinal virtual dividing line (15) on the tape transition section (6b). The longitudinal virtual dividing line (15) is exactly at the tangent of the tape transition section (6b) and the roller (5). In this state, the longitudinal virtual dividing line (15) and the sharp protrusion (25) on the outer peripheral surface of the roller (5) are not in a coincident state. Based on the above, control translation arm a (10) or translation arm b (3) to make the roller (5) roll relative to the length direction of one side of the magnetic core (7), so that the roller (5) gradually rolls and bonds the belt transition section (6b) to one side of the magnetic core (7). During the process of the roller (5) gradually rolling the belt transition section (6b) to one side of the magnetic core (7), the relative position of the longitudinal virtual dividing line (15) and the axis of the roller (5) remains unchanged. During the rolling process, the roller (5) itself will rotate counterclockwise from the top view, so that the sharp protrusion (25) on the outer circumference of the roller (5) gradually rotates to the same position as the roller (5). When the longitudinal virtual dividing line (15) coincides, and the sharp protrusion (25) on the outer circumference of the roller (5) just rotates to coincide with the longitudinal virtual dividing line (15), the belt transition section (6b) is cut off by the sharp protrusion (25). At the same time, the first limiting side (4a) makes limiting contact with the a limiting protrusion (19), and the roller (5) can no longer rotate counterclockwise. Then the roller (5) continues to slide and roll the broken half of the belt transition section (6b) and stick it to the side of the magnetic core (7) in a non-rolling sliding manner. The other half of the belt transition section (6b) remains at the end of the insulating tape (6).

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