A flying fork type winding machine and working method thereof

Abstract

The present invention relates to a flying fork type winding machine and a working method thereof, comprising a machine body, a spindle box capable of moving forward and backward is installed on the table of the machine body, a spindle with a threading hole in the center is installed in the spindle box, a winding mechanism for winding is installed at the front end of the spindle, and a mounting mechanism for mounting a stator core is also installed on the table of the machine body, located in front of the winding mechanism for mounting the stator core, the winding mechanism comprises a flying fork installed at the front end of the spindle and a trapezoidal wire slider with a small front and a large rear for forcing the enameled wire to slide into the teeth of the stator core, a lifting and lowering positioning mechanism for guiding the wire slider to move forward and backward is arranged below the wire slider, and a pair of wire protection rods are arranged in front of the winding mechanism for blocking between the stator core and the winding mechanism to prevent the enameled wire from hitting the stator core. The flying fork type winding machine of the present invention can effectively protect the enameled wire, avoid the enameled wire from colliding with the stator core during the winding process, causing problems such as deformation and paint removal of the enameled wire, and reduce coil damage.

Description

Technical Field

[0001] The invention relates to a flying fork type winding machine and a working method thereof. Background Art

[0002] With the continuous advancement of science and technology, there are many types of winding machine equipment, such as stator winding machine, electromagnetic switch coil winding machine, etc. There are two main types of stator winding machines. One is that the guide needle drives the enameled wire to move up and down while moving forward and backward, so that the stator core cooperates with the guide needle movement to complete the winding. The other is a flying fork stator core winding machine. However, the current flying fork winding machine has two problems. One is the insufficient wire arrangement accuracy of the coil, and the other is the damage to the enameled wire.

[0003] When the flying fork winding machine is winding, the flying fork rotates at high speed to allow the enameled wire to be wound around the stator core. Because the flying fork swings the enameled wire at too fast a speed, it will cause the enameled wire and the stator core to collide, causing the enameled wire to deform or even peel off, affecting product quality. At the same time, when the stator core is wound, the enameled wire and the flying fork have sliding friction, which causes greater wear on the enameled wire. In severe cases, the enameled wire will be pulled thinner, making the resistance larger. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a flying fork winding machine and a working method thereof, which can effectively protect the enameled wire, avoid the enameled wire from colliding with the stator core during the winding process, causing problems such as deformation and paint peeling of the enameled wire, and reduce coil damage.

[0005] The present invention is implemented by the following scheme: a flying fork type winding machine, comprising a machine body, a spindle box that can move forward and backward is installed on the table of the machine body, a spindle with a threading hole in the center is installed in the spindle box, a winding mechanism for winding is installed at the front end of the spindle, and a mounting mechanism for mounting a stator core in front of the winding mechanism is also installed on the table of the machine body. The winding mechanism comprises a flying fork installed at the front end of the spindle and a trapezoidal wire slider with a small front and a large rear for forcing the enameled wire to slide into the teeth of the stator core, a lifting and lowering positioning mechanism for guiding the wire slider to move forward and backward is arranged below the wire slider, and a pair of wire protection rods are arranged in front of the winding mechanism to block between the stator core and the winding mechanism to prevent the enameled wire from hitting the stator core.

[0006] Furthermore, a connecting block is mounted on the front end of the main shaft, a slot communicating with the threading hole for the enameled wire to pass through is formed at the front end of the main shaft, a wire wheel for the enameled wire to pass around is installed on the connecting block, the flying fork is perpendicular to the axis of the main shaft and a wire wheel is installed at one end facing outward, and a groove matching the teeth on the stator core is formed at the front end of the wire slider.

[0007] Furthermore, the spindle box is installed on a base plate located below it and can move back and forth relative to the machine body table. A movable motor is installed on the machine body table to drive the base plate to move back and forth, and the movable motor drives the base plate to move through a screw nut pair; a spindle motor that drives the spindle to rotate is installed in the spindle box, and the rear end of the spindle and the spindle motor are rotatably connected through a transmission belt and a pair of pulleys.

[0008] Furthermore, the positioning mechanism includes two positioning blocks that can be raised and lowered, one on the left and one on the right, and a guide groove that is adapted to the wire slider and used to guide the movement of the slider is formed between the two positioning blocks. The wire protection rod can move forward and backward and is provided with a cutting groove that is adapted to the teeth on the stator core.

[0009] Furthermore, the lower end of the wire protection rod is fixedly connected to a movable frame located below the machine body table and capable of moving forward and backward. The movable frame is equipped with a first lifting cylinder for driving the two positioning blocks to lift and lower. A window hole is provided on the machine body table for the wire protection rod to pass through and the positioning blocks to extend upward; a movable cylinder for moving the movable frame forward and backward is installed on the lower side of the machine body table.

[0010] Furthermore, the installation mechanism includes a gantry and a rotating table located on the gantry, a positioning seat adapted to the center hole of the stator core is arranged in the middle of the rotating table, a positioning pin adapted to the through hole on the stator core is fixedly connected to the edge of the rotating table, a pressure plate for pressing the stator core is arranged above the positioning seat, a pressing piece rotatably matched with the pressure plate is arranged at the center of the pressure plate, a pressing cylinder for pressing the pressing piece is installed on the gantry, and a rotating motor for driving the rotating table to rotate is installed under the machine body table.

[0011] Furthermore, the gantry is equipped with a wire clamp assembly for fixing the ends of the enameled wires, the wire clamp assembly includes a clamping cylinder, a fixed clamp is fixedly mounted on the end face of the clamping cylinder, a middle hole is provided in the middle of the fixed clamp for the telescopic rod of the clamping cylinder to pass through, a movable clamp cooperating with the fixed clamp is installed at the end of the telescopic rod of the clamping cylinder, a vertical mounting plate is fixedly mounted on the gantry, a slide seat that can slide up and down relative to the vertical mounting plate is installed, the cylinder of the wire clamp assembly is installed on the slide seat, and a second lifting cylinder that drives the slide seat to slide up and down is installed on the vertical mounting plate.

[0012] Furthermore, a casing is provided on the table top of the machine body, and the casing includes a frame and transparent plates installed on the side and top of the frame; a tension control mechanism located behind the spindle box is also installed on the machine body, and a straightening mechanism located behind the spindle is arranged in the spindle box.

[0013] Another technical solution of the present invention: a working method of the above-mentioned flying fork winding machine, comprising the following steps: (1) controlling the main shaft box to move forward a certain distance so that the tooth portion on the stator core to be wound with the enameled wire extends into the groove at the front end of the wire slider; (2) driving the flying fork to rotate by rotating the main shaft to wind the enameled wire around the wire slider and slide it onto the corresponding tooth portion of the stator core, and the main shaft rotates the main shaft box while retreating backward so that the wire slider gradually withdraws from the tooth slot of the stator core, completing the winding of the enameled wire on the corresponding tooth portion of the stator core; (3) the stator core rotates through a certain angle so that the next tooth portion on the stator core to be wound with the enameled wire is aligned with the groove of the wire slider; (4) repeating the above steps (1) to (3) until all teeth on the stator core have completed the winding of the enameled wire.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) It can effectively protect the enameled wire, prevent the enameled wire from colliding with the stator core during the winding process, causing problems such as enameled wire deformation and paint peeling, and reduce coil damage;

[0016] (2) The sliding friction between the enameled wire and the flying fork is converted into rolling friction to reduce the wear and deformation of the enameled wire caused by friction;

[0017] (3) Use the wire slider to improve the coil arrangement accuracy and winding speed, improve production efficiency, improve product quality and reduce costs.

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through specific embodiments and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a stereogram of an embodiment of the present invention;

[0020] Figure 2 is a side view of an embodiment of the present invention;

[0021] Figure 3 It is a three-dimensional diagram of the internal structure of the winding machine according to an embodiment of the present invention;

[0022] Figure 4 1. It is a top view of the internal structure of the winding machine according to an embodiment of the present invention;

[0023] Figure 5 It is a side view of the internal structure of the winding machine according to an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the winding mechanism structure in an embodiment of the present invention;

[0025] Figure 7 is a three-dimensional diagram of a wire slider in an embodiment of the present invention;

[0026] Figure 8 is a three-dimensional diagram of a positioning mechanism in an embodiment of the present invention;

[0027] Fig. 9 is a three-dimensional diagram of the installation mechanism in an embodiment of the present invention;

[0028] Fig.10 is a three-dimensional diagram of a wire clamp assembly in an embodiment of the present invention;

[0029] Explanation of the numbers in the figure: 100-body, 110-table, 120-seat plate, 130-casing, 200-spindle box, 210-spindle, 220-spindle motor, 230-straightening mechanism, 300-winding mechanism, 310-flying fork, 320-wire slider, 321-groove, 330-connecting block, 340-wire wheel, 350-wire wheel, 360-counterweight, 400-installation mechanism, 410-gantry, 420-rotating table, 430-positioning base, 440-positioning pin, 4 50-pressing plate, 460-pressing member, 470-pressing cylinder, 480-rotating motor, 500-positioning mechanism, 510-positioning block, 520-moving frame, 530-first lifting cylinder, 540-moving cylinder, 600-wire protection rod, 610-cutting groove, 700-wire clamp assembly, 710-clamping cylinder, 720-fixed chuck, 730-movable chuck, 740-vertical mounting plate, 750-sliding seat, 760-second lifting cylinder, 800-tension control mechanism, 900-stator core. DETAILED DESCRIPTION

[0030] like Figures 1 to 10As shown, a flying fork type winding machine comprises a machine body 100 with a table 110, a spindle box 200 capable of moving forward and backward is installed on the table 110 of the machine body 100, a spindle 210 with a threading hole at the center is installed in the spindle box 200, a winding mechanism 300 for winding is installed at the front end of the spindle, and a mounting mechanism 400 for mounting a stator core in front of the winding mechanism 300 is also installed on the table 110 of the machine body 100, the winding mechanism 300 comprises a flying fork 310 installed at the front end of the spindle and a trapezoidal wire slider 320 with a small front and a large rear for forcing the enameled wire to slide into the teeth of the stator core, and a liftable guide for guiding the wire slider 320 to move forward and backward is provided below the wire slider 320 Positioning mechanism 500, a pair of wire protection rods 600 are arranged in front of the winding mechanism 300 to block between the stator core and the winding mechanism to prevent the enameled wire from hitting the stator core; the enameled wire is wound on the guide slider and then slides into the stator core tooth. At the same time, due to the blocking protection of the wire protection rod, the swinging enameled wire will not spray onto the stator core, avoiding the enameled wire from colliding with the stator core during the winding process, causing enameled wire deformation and paint peeling, etc., affecting product quality. The use of the wire slider can improve the wire arrangement accuracy of the coil and the winding speed of the coil; when one tooth is completed with enameled wire winding, the stator core is rotated to switch to the next tooth for enameled wire winding, until the teeth on the entire stator core are completed with enameled wire winding.

[0031] In this embodiment, the rear end of the wire slider is rotatably matched with the front end of the main shaft through a bearing. When winding, the main shaft rotates, and the wire slider does not rotate with the main shaft; the front end of the main shaft 210 is equipped with a connecting block 330, and the front end of the main shaft is provided with a notch that communicates with the threading hole for the enameled wire to pass through, and the connecting block 330 is installed with a wire wheel 340 for the enameled wire to pass around, the flying fork is perpendicular to the main shaft axis and a wire wheel 350 is installed at the outward end, and the front end of the wire slider is provided with a notch that communicates with the stator core The tooth portion is adapted to the groove 321; when winding, the spindle box moves forward a certain distance so that the wire slider extends into the tooth slot of the stator core, and the tooth portion on the stator core to be wound extends into the groove 321 of the wire slider. When the flying fork rotates with the main shaft to wind the enameled wire on the wire slider, the enameled wire will slide into the tooth portion of the stator core along the inclined surface of the wire slider and enter and be wound on the tooth portion; the enameled wire is guided by a wire wheel, and the rotation of the wire wheel converts sliding friction into rolling friction to reduce the wear and deformation of the enameled wire caused by friction.

[0032] In this embodiment, a counterweight block 360 is connected to the connecting block 330 on the side opposite to the flying fork by bolts, so as to reduce the torque of the main shaft when it rotates at high speed and ensure the smooth rotation of the main shaft.

[0033] In this embodiment, the spindle box 200 is installed on a base plate 120 located below it and can move back and forth relative to the machine body table. A mobile motor 130 that drives the base plate 120 to move back and forth is installed on the table 110 of the machine body 100, and the mobile motor 130 drives the base plate to move through a screw nut pair; a spindle motor 220 that drives the spindle to rotate is installed in the spindle box 200, and the rear end of the spindle 210 and the spindle motor 220 are rotatably connected through a transmission belt and a pair of pulleys; the mobile motor 130 adopts a servo motor, and the spindle motor drives the spindle to rotate for winding, and the mobile motor drives the spindle box to move back and forth for wire arrangement. When winding, the mobile motor drives the spindle box to move backward, thereby causing the winding mechanism at the front end of the spindle to gradually move backward, so that the enameled wire can be accurately arranged on the teeth of the stator core.

[0034] In this embodiment, the positioning mechanism 500 includes two positioning blocks 510 that can be raised and lowered, one on the left and one on the right. A guide groove that is adapted to the wire slider and used to guide the movement of the slider is formed between the two positioning blocks 510. The wire protection rod can move forward and backward and is provided with a groove 610 that is adapted to the teeth on the stator core. The groove 610 makes way for the stator core. Since the wire slider can rotate relative to the main shaft, adding a positioning mechanism can prevent the wire slider from deviating. When the positioning mechanism is not needed, the two positioning blocks of the positioning mechanism can be lowered and retracted.

[0035] In this embodiment, the lower end of the wire protection rod 600 is fixedly connected to a movable frame 520 located below the machine body table and capable of moving forward and backward. The wire protection rod 600 and the positioning mechanism 500 move forward and backward synchronously. The movable frame 520 is equipped with a first lifting cylinder 530 for driving the two positioning blocks to lift and lower. A window hole is provided on the machine body 100 table 110 for the wire protection rod to pass through and the positioning blocks to extend upward. A movable cylinder 540 for moving the movable frame forward and backward is installed on the lower side of the machine body table. The driving end of the movable cylinder is fixedly connected to a transverse connecting rod, and both ends of the transverse connecting rod are fixedly connected to guide shafts arranged along the front and rear directions. Both ends of the movable frame are fixedly connected to the guide shafts on both sides, and a guide seat that slides with the guide shaft is fixedly installed on the lower side of the machine body table.

[0036] In this embodiment, the installation mechanism 400 includes a gantry 410 and a rotating table 420 located on the gantry, a positioning seat 430 adapted to the middle hole of the stator core is arranged in the middle of the rotating table 420, and a positioning pin 440 adapted to the through hole on the stator core is fixedly connected to the edge of the rotating table, a pressure plate 450 for pressing the stator core is arranged above the positioning seat, and a pressing piece 460 for rotating with it is arranged at the center of the pressure plate, a pressing cylinder 470 for pressing the pressing piece is installed on the gantry, and a rotating motor 480 for driving the rotating table to rotate is installed under the body table; when installing the stator core, first remove the pressure plate, then put the stator core on the positioning seat, install the pressure plate, and then use the pressure cylinder to press the pressing piece to enter and fix the stator core through the pressure plate.

[0037] In this embodiment, the gantry 410 is equipped with a wire clamp assembly 700 for fixing the end of the enameled wire, and the wire clamp assembly 700 includes a clamping cylinder 710, and a fixed chuck 720 is fixedly installed on the end face of the clamping cylinder 710. A middle hole is opened in the middle of the fixed chuck 720 for the telescopic rod of the clamping cylinder to pass through, and a movable chuck 730 cooperating with the fixed chuck is installed at the end of the telescopic rod of the clamping cylinder. When the telescopic rod of the clamping cylinder 710 is retracted, the movable chuck cooperates with the fixed chuck to clamp the end of the enameled wire; a vertical mounting plate 740 is fixedly installed on the gantry, and a slide seat 750 that can slide up and down relative to it is installed on the vertical mounting plate, and the cylinder of the wire clamp assembly is installed on the slide seat, and a second lifting cylinder 760 for driving the slide seat to slide up and down is installed on the vertical mounting plate.

[0038] In this embodiment, a casing 140 is provided on the table top of the machine body 100, and the casing includes a frame and a transparent plate installed on the side and top of the frame; a tension control mechanism 800 located at the rear of the spindle box is also installed on the machine body 100, and a straightening mechanism 230 located at the rear of the spindle is arranged in the spindle box 200, wherein the tension control mechanism 800 and the straightening mechanism 230 belong to the prior art, and their structures and principles are not specifically described here; after the enameled wire comes out of the wire barrel (not shown in the figure) below the wire barrel tension control mechanism, it passes through the tension control mechanism and enters the spindle box, passes through the spindle after passing through the straightening mechanism, and then reaches the wire wheel and the wire wheel; the tension control mechanism provides a certain tension for the enameled wire, so that when the enameled wire is wound on the wire slider, it can slide into the tooth portion of the stator core along the inclined surface on the wire slider due to the tension.

[0039] A working method of the flying fork winding machine as described above comprises the following steps: (1) installing the stator core, drawing the enameled wire from the wire barrel and passing through the tension controller mechanism, the straightening mechanism, the main shaft, the wire passing wheel, and the wire guide wheel in sequence, and then clamping the enameled wire on the wire clamp assembly; then moving the motor to rotate forward, controlling the main shaft box to move forward a certain distance so that the teeth on the stator core to be wound with the enameled wire extend into the groove at the front end of the wire slider; (2) the main shaft motor is working, and the main shaft rotates to drive the flying fork to rotate to wind the enameled wire. The wire slider is slid onto the corresponding tooth of the stator core, the spindle motor is reversed, and the spindle box is rotated while the spindle moves backward so that the wire slider gradually withdraws from the tooth slot of the stator core, completing the winding of the enameled wire on the corresponding tooth of the stator core; (3) The rotating motor drives the stator core to rotate through a certain angle so that the next tooth on the stator core that needs to be wound with enameled wire is aligned with the groove of the wire slider; (4) Repeat the above steps (1) to (3) until all teeth on the stator core are wound with enameled wire.

[0040] Unless otherwise stated, any technical solution disclosed in the present invention disclosed above, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0041] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integrated molding using a casting process) (except when it is obviously impossible to use an integrated molding process).

[0042] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the present invention include states or shapes that are approximate, similar, or close to them.

[0043] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A flying fork type winding machine, characterized in that: The invention comprises a machine body, a main shaft box which can move forward and backward is installed on the table of the machine body, a main shaft with a threading hole in the center is installed in the main shaft box, a winding mechanism for winding is installed at the front end of the main shaft, and a mounting mechanism for mounting a stator core is also installed on the table of the machine body, the winding mechanism comprises a flying fork installed at the front end of the main shaft and a trapezoidal wire slider which is small at the front and large at the rear for forcing the enameled wire to slide into the teeth of the stator core, the rear end of the wire slider is rotatably matched with the front end of the main shaft through a bearing, the main shaft rotates when winding, and the wire slider does not rotate with the main shaft; a lifting and lowering positioning mechanism for guiding the wire slider to move forward and backward is arranged below the wire slider, a pair of wire protection rods for blocking between the stator core and the winding mechanism to prevent the enameled wire from hitting the stator core are arranged in front of the winding mechanism; a connecting block is fitted on the front end of the main shaft, and a connecting block is provided at the front end of the main shaft The holes are connected to each other to allow the enameled wire to pass through a notch, and a wire wheel for the enameled wire to pass around is installed on the connecting block, the flying fork is perpendicular to the main shaft axis and a wire wheel is installed on one end facing outward, and a groove is provided at the front end of the wire slider to match the tooth portion on the stator core; the spindle box is installed on a seat plate located below it and can move back and forth relative to the machine body table, and a moving motor for driving the seat plate to move back and forth is installed on the machine body table, and the moving motor drives the seat plate to move through a screw nut pair; a spindle motor for driving the spindle to rotate is installed in the spindle box, and the rear end of the spindle and the spindle motor are rotatably connected by a transmission belt and a pair of pulleys; the positioning mechanism includes two positioning blocks that can be raised and lowered, one on the left and one on the right, and a guide groove is formed between the two positioning blocks to match the wire slider for guiding the movement of the slider, and the wire guard rod can move back and forth and a cutting groove is provided on the wire guard rod to match the tooth portion on the stator core.

2. The flying fork winding machine according to claim 1, characterized in that: The lower end of the wire protection rod is fixedly connected to a movable frame located below the machine body table and capable of moving forward and backward. The movable frame is equipped with a first lifting cylinder for driving the two positioning blocks to lift and lower. A window hole is provided on the machine body table for the wire protection rod to pass through and the positioning blocks to extend upward. A movable cylinder for moving the movable frame forward and backward is installed on the lower side of the machine body table.

3. The flying fork type winding machine according to claim 1, characterized in that: The installation mechanism includes a gantry and a rotating table located on the gantry, a positioning seat adapted to the center hole of the stator core is arranged in the middle of the rotating table, a positioning pin adapted to the through hole on the stator core is fixedly connected to the edge of the rotating table, a pressure plate for pressing the stator core is arranged above the positioning seat, a pressing piece rotatably matched with the pressure plate is arranged at the center of the pressure plate, a pressing cylinder for pressing the pressing piece is installed on the gantry, and a rotating motor for driving the rotating table to rotate is installed under the machine body table.

4. The flying fork type winding machine according to claim 3, characterized in that: The gantry is equipped with a wire clamp assembly for fixing the ends of the enameled wires, and the wire clamp assembly includes a clamping cylinder, a fixed clamp is fixedly mounted on the end face of the clamping cylinder, a middle hole is provided in the middle of the fixed clamp for the telescopic rod of the clamping cylinder to pass through, and a movable clamp cooperating with the fixed clamp is mounted on the end of the telescopic rod of the clamping cylinder. A vertical mounting plate is fixedly mounted on the gantry, and a slide seat that can slide up and down relative to the vertical mounting plate is mounted on the vertical mounting plate, and a cylinder of the wire clamp assembly is mounted on the slide seat, and a second lifting cylinder that drives the slide seat to slide up and down is mounted on the vertical mounting plate.

5. The flying fork type winding machine according to claim 1, characterized in that: A casing is provided on the table top of the machine body, and the casing includes a frame and transparent plates installed on the side and top of the frame; a tension control mechanism located behind the spindle box is also installed on the machine body, and a straightening mechanism located behind the spindle is arranged in the spindle box.

6. A working method of the flying fork winding machine according to claim 1, characterized in that: The following steps are involved: (1) The spindle box is controlled to move forward a certain distance so that the tooth on the stator core to be wound with the enameled wire extends into the groove at the front end of the wire slider; (2) The flying fork is driven to rotate by the rotation of the main shaft to wrap the enameled wire around the wire slider and slide it into the corresponding tooth of the stator core. The spindle rotates while the spindle box moves backward so that the wire slider gradually withdraws from the tooth slot of the stator core, completing the winding of the enameled wire on the corresponding tooth of the stator core; (3) The stator core is rotated through a certain angle so that the next tooth on the stator core to be wound with the enameled wire is aligned with the groove of the wire slider; (4) The above steps (1) to (3) are repeated until all teeth on the stator core are wound with enameled wire.

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