Winding device and winding method

Abstract

To provide a winding device difficult to be influenced by manufacturing variation of a winding object, and capable of molding start and end terminals at proper positions.SOLUTION: A winding device 10 according to the present invention comprises: a length correction part for correcting a preset referent length; a wire supply part 11 for supplying a round-shaped wire; a molding part 12 provided on a downstream side of the wire supply part 11 and molding a shape of the wire into a rectangular shape; and a winding part 14 provided on a downstream side of the molding part 12 and winding the wire around a winding object. The molding part 12 performs start and end terminal processing for not molding portions of the wire corresponding to start and end terminals of the winding object, and molding processing for molding the wire corresponding to a wound portion of the winding object. The length correction part performs correction processing for obtaining a correction reference length obtained by correcting the reference length, and the start and end terminal processing is performed when a supply length of the wire supplied after start of winding reaches the correction reference length.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a winding device and a winding method. [Background technology]

[0002] When a flat wire is formed from a round wire using a flat wire forming device and the formed flat wire is wound around the teeth of a split core, there is a possibility that scratches will occur in the winding when the cross-sectional shape of the winding is changed.

[0003] Therefore, Patent Document 1 discloses a winding device that aims to prevent deterioration in product quality due to scratches on the winding, even when the cross-sectional shape of the winding is deformed midway before being wound around the winding target.

[0004] Specifically, the document discloses a winding device that supplies a winding from a wire supply source to a winding target and winds it around the winding target, characterized in that it comprises a winding deformation section that is arranged downstream of the wire supply source and changes the cross-sectional shape of the winding, and a flaw detection section that is arranged downstream of the winding deformation section and detects flaws in the winding. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2023-132628 Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, in a winding object such as a split core, both ends (also called start and end terminals) of the wound coil wire serve as lead portions for connection. For this reason, it is preferable that the ends of the wire wound around the winding target remain round so that the connecting work to be performed after the winding can be easily performed.

[0007] If an attempt is made to form such round end portions, the wire portions at the end portions will remain round without being shaped, and the subsequent portions to be wound around the winding target will be shaped into a rectangular shape.

[0008] Specifically, the initial short length portion that becomes the starting end is left as a round wire rod, and then the flat rectangular shape to be wound is formed, and the round wire rod at the starting end is not wound around the object to be wound, but the flat rectangular portion is wound around it.

[0009] Then, the short wire portions (also called the start and end portions) that correspond to the end portion of the current winding target and the start portion of the next winding target are again not formed but are made into round wire, and then they are formed into a rectangular shape corresponding to the winding portion, and then the short wire portions that should become the start and end portions are not formed, and this process is repeated.

[0010] In other words, when the wire is formed, there is a short, unformed portion, followed by a long, rectangular portion, and this is repeated.

[0011] When the start and end portions reach the end of the current winding target, they are cut to separate the end portion and the start portion, and the portion after the start portion becomes the wire for the next winding target, and this process is repeated to continuously wind the wire.

[0012] Incidentally, the divided stator cores to be wound naturally have variations in shape within the range of manufacturing tolerances. That is, the outer shape of the wound portion may be small or large, and variations in the outer shape appear as differences in the length of the wire required to wind the wire the same number of times.

[0013] Therefore, even if the number of windings around the winding target is the same, there will be variations in the required length of the wire to be wound, and if the positions for forming the start and end terminals are controlled based on the length of the wire supplied from the start of winding, there are cases where the start and end terminals cannot be formed in the appropriate positions due to the variations in the required length of the wire actually required to be wound.

[0014] Specifically, if the object to be wound is larger than the designed outer shape of the object, the wire will be wound longer than the designed winding length.

[0015] If the start and end portions are formed at the designed length position, the wire will actually be wound longer than designed, so the start and end portions will end up being wound around the object to be wound, and furthermore, the formed portion to be wound around the next object to be wound will be located at the position where the start and end portions should originally be.

[0016] When this happens, not only does the round wire end up inside the wound section, causing the winding to collapse, but the rectangular section that was formed ends up in the area that should be the termination, which increases the defect rate in the next connection process.

[0017] The present invention has been made in consideration of the above circumstances, and aims to provide a winding device and a winding method that are less susceptible to the influence of manufacturing variations in the winding object and that can form the start and end terminals at appropriate positions. [Means for solving the problem]

[0018] In order to achieve the above object, the present invention is realized by the following configuration. The winding device of the present invention is a winding device that winds wire around a winding object, and includes: a length correction unit that corrects a predetermined reference length; a wire supply unit that supplies the round wire; a shaping unit that is located downstream of the wire supply unit and shapes the wire into a rectangular shape; and a winding unit that is located downstream of the shaping unit and winds the wire around the winding object. The shaping unit performs a start / end processing step in which no shaping is performed on the portions of the wire that correspond to the start and end of the winding object, and a shaping process in which shaping is performed on the wire that corresponds to the portion to be wound around the winding object. The length correction unit performs a correction process to determine a corrected reference length by correcting the reference length based on shape variations in the winding object, and the start / end processing step is performed when the length of the wire that has been supplied since the start of winding reaches the corrected reference length.

[0019] The winding method of the present invention is a winding method for winding a wire around a winding object, and includes a start / end step in which portions of the wire corresponding to the start and end of the winding object are not shaped but remain round, and a shaping step in which the wire corresponding to the portion to be wound around the winding object is shaped into a rectangular shape, and the start / end step is performed when the length of the wire supplied from the start of winding reaches a corrected reference length obtained by correcting a predetermined reference length based on shape variations in the winding object. [Effects of the Invention]

[0020] According to the present invention, it is possible to provide a winding device and a winding method that are less susceptible to the influence of manufacturing variations in the winding object and that are capable of forming start and end terminals at appropriate positions. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view of a brushless motor having a divided core that can be suitably applied to a winding device according to an embodiment of the present invention; [Figure 2] FIG. 2 is a side view of a portion corresponding to one divided core in the embodiment according to the present invention. [Figure 3]1 is a top view for explaining a winding device according to an embodiment of the present invention; [Figure 4] 10A and 10B are diagrams for explaining a molding operation in a molding unit according to an embodiment of the present invention. [Figure 5] FIG. 2 is a side view of an encoder portion of the embodiment according to the present invention; [Figure 6] 1 is a diagram for explaining a main part of a length measuring instrument according to an embodiment of the present invention; [Figure 7] 5A to 5C are diagrams illustrating the content of correction performed by a length correction unit according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a mode for carrying out the present invention (hereinafter referred to as an "embodiment") will be described in detail with reference to the accompanying drawings. It should be noted that the same elements are denoted by the same numbers or symbols throughout the description of the embodiments.

[0023] FIG. 1 is a perspective view of a brushless motor 1 having a divided core 7 that can be suitably applied to a winding device 10 (see FIG. 3) according to an embodiment of the present invention. FIG. 2 is a side view of a portion corresponding to one of the divided cores 7 according to the embodiment of the present invention.

[0024] As shown in FIG. 1, for example, a brushless motor 1 (also simply referred to as a motor) has a stator 2 press-fitted into a housing (not shown), and a rotor 3 arranged radially inside the stator 2 and rotatable relative to the stator 2.

[0025] The stator 2 includes a stator core 4 , an insulating insulator 5 attached to the stator core 4 , and a coil 6 .

[0026] The stator core 4 is a split-core type stator core 4 formed by connecting a plurality of split cores 7 (one example of a wound object of the present invention) split in the circumferential direction in an annular shape.

[0027] As shown in Figure 2, a coil wire 8 (an example of the wire material of the present invention) is wound around the split core 7 to form the coil 6, but the coil wire 8 of the portion 8A wound around the split core 7 has a rectangular shape so that it can be wound as tightly as possible, increasing the density and improving the performance of the motor.

[0028] On the other hand, the coil wire 8 at the portion 8B (hereinafter referred to as the starting end, the ending end, or collectively as the starting end and the ending end) pulled out from the split core 7 is made into a round coil wire 8, which makes it less likely to cause defects during the connection work of welding to a bus bar, etc. Since FIG. 2 is a side view, only the end of the start and end is shown, and the start end that overlaps towards the back of the page is not visible.

[0029] The winding device 10 of this embodiment is a device suitable for winding a wire around a split core 7 while forming the winding portion into a rectangular shape while forming the start and end portions into a round shape, and will be described below with reference to Figures 3 to 7.

[0030] FIG. 3 is a top view for explaining the winding device 10 according to the embodiment of the present invention. As shown in FIG. 3, the winding device 10 of this embodiment includes a wire supply unit 11 that supplies a round coil wire 8, a forming unit 12 that is provided downstream of the wire supply unit 11 and forms the coil wire 8 into a rectangular shape, a tension adjustment unit 13 that is provided downstream of the forming unit 12 and controls the tension during winding, and a winding unit 14 that is provided downstream of the forming unit 12 (more specifically, the tension adjustment unit 13) and winds the coil wire 8 around the split core 7.

[0031] The upstream side (upstream) means the wire supply section 11 side where the supply of the coil wire 8 starts, and the downstream side (downstream) means the opposite side, the winding section 14 side, and the same applies hereinafter.

[0032] Furthermore, the winding device 10 of this embodiment is provided with an encoder ENC (an example of a supply length measuring unit of the present invention) that is provided between the forming unit 12 and the winding unit 14 (more specifically, between the forming unit 12 and the tension adjusting unit 13) and that measures the supplied length of the coil wire 8, a length measuring device 15 that is provided next to the winding unit 14 and that measures the length variation of the shape of the split core 7, a control unit PLC that is responsible for the overall control of the winding device 10, and a nozzle NZ that is provided between the tension adjusting unit 13 and the winding unit 14 and that supplies the coil wire 8 to the winding unit 14.

[0033] The wire supply unit 11 is a reel around which a round coil wire 8, a so-called magnet wire, is wound.

[0034] The forming section 12 comprises a first forming section 12A (only the upper forming roller is visible in the figure) having a pair of forming rollers that clamp and form the coil wire 8 from a first direction (top-bottom direction) perpendicular to the coil wire 8, and a second forming section 12B having a pair of forming rollers that clamp and form the coil wire 8 from a second direction (left-right direction) perpendicular to the coil wire 8 and the first direction.

[0035] FIG. 4 is a diagram for explaining the molding operation in the molding section 12 of the embodiment according to the present invention, and is illustrated from left to right, from upstream to downstream. As shown in FIG. 4, the coil wire 8 supplied from the wire supply unit 11 (see FIG. 3) is a round coil wire 8.

[0036] When the coil wire 8 passes through the first forming section 12A, the width of which is regulated by the upper and lower rollers, the vertical width is shaped to width X, and when it passes through the second forming section 12B, the width of which is regulated by the left and right rollers, the horizontal width is shaped to width Y. By passing through forming section 12, the coil wire 8 is shaped into a flat rectangular coil wire 8 having a vertical width of X and a horizontal width of Y, as shown on the right side.

[0037] The upper roller and the lower roller can be moved toward or away from each other by a drive mechanism (not shown), thereby changing the separation distance between the upper roller and the lower roller. Similarly, the left and right rollers can be moved toward and away from each other by a drive mechanism (not shown), thereby changing the separation distance between the left and right rollers.

[0038] Therefore, in order to prevent the coil wire 8 corresponding to the beginning and end portions from being shaped, a drive mechanism (not shown) drives the coil wire 8 so as to increase the distance between the upper roller and the lower roller and the distance between the left roller and the right roller, so that the round coil wire 8 supplied from the wire supply unit 11 passes through without being shaped, and the round coil wire 8 remains at the beginning and end portions.

[0039] As shown in FIG. 3, the tension adjustment unit 13 includes tension rollers (first tension roller 13A, second tension roller 13B) and a motor (not shown) that rotates the tension rollers.

[0040] The tension rollers (first tension roller 13A, second tension roller 13B) of this embodiment are designed to have a high gripping force so that the coil wire 8 can be pulled out from the molded portion 12 without slippage occurring between them.

[0041] Specifically, the diameter of the tension rollers (first tension roller 13A, second tension roller 13B) is set to 150 mmφ to increase the contact area with the coil wire 8, and at least the part that comes into contact with the coil wire 8 is made of a natural rubber material with high friction resistance and a Shore hardness equivalent to A90. Regarding the diameter, if it is too large it will require more space, so it is best to keep it between 140mmφ and 200mmφ, for example.

[0042] Although not shown, the first tension roller 13A and the second tension roller 13B are connected by a belt, and by driving the belt with a motor, the first tension roller 13A and the second tension roller 13B rotate in synchronization.

[0043] In this configuration, both the first tension roller 13A and the second tension roller 13B are drive rollers, so the driven roller does not act as a load on the drive roller, as would occur if the other roller were a driven roller that simply rotated in accordance with the movement of the coil wire 8, and this contributes to preventing slippage between the coil wire 8 and the drive roller.

[0044] FIG. 5 is a side view of the encoder ENC according to the embodiment of the present invention. The illustration enclosed in the balloon in FIG. 5 is a plan view showing only the rotating disk E1. Also, in FIG. 5, a unit that calculates the length of the supplied coil wire 8 based on the detection result detected by a detector of the encoder ENC, which will be described later, is not shown. However, it is not necessary to be limited to providing a calculation unit, and the control unit PLC described later may perform calculations to determine the length of the supplied coil wire 8 based on the detection results detected by this detection unit.

[0045] The encoder ENC has a detection unit (described later) provided between the forming unit 12 and the winding unit 14 (more specifically, the tension adjustment unit 13), and is a measurement unit that measures the length of the supplied coil wire 8. As will be described later, it is important that accurate measurements can be made in order to determine the start and end timings.

[0046] Depending on the structure of the encoder, the load on the detection mechanism may be large, which may make it difficult for the roller R to rotate, causing slippage between the roller R and the coil wire 8 and making detection unstable. In this case, the accuracy of the length of the supplied coil wire 8 determined based on the detection result will be poor.

[0047] Therefore, as shown in Figure 5, the encoder ENC of this embodiment has, as a detection unit, a pair of rollers R that rotate in contact with the coil wire 8, a rotating disk E1 that has slits S evenly spaced circumferentially and is attached to the rotation axis of one of the rollers R, and an optical sensor E2 (an example of a passing sensor of the present invention) that detects the passage of the rotating disk E1 through the slit S in a non-contact manner, and the rotating disk E1 and the optical sensor E2 that constitute the detection mechanism (see the area surrounded by dotted lines in Figure 5) are non-contact, thereby significantly reducing frictional resistance.

[0048] Therefore, the rollers R provided on the turntable E1 rotate easily, and as a result, slippage between the rollers R and the coil wire 8 is suppressed, making it possible to measure the supply length stably.

[0049] This structure detects the rotation state (number of rotations) of roller R as it passes through slit S, and calculates the length of the coil wire 8 that has passed from the number of rotations of roller R and the circumference (perimeter) of the contact part between roller R and coil wire 8, thereby measuring the length of the supplied coil wire 8.

[0050] The winding section 14 is equipped with a rotation mechanism (not shown) that winds the coil wire 8 supplied to the split core 7 by rotating the split core 7 while holding the split core 7 and the starting end of the coil wire 8.As a result, the starting end held by the rotation mechanism is not wound around the split core 7, and then the flat-shaped coil wire 8 supplied in accordance with the rotation is wound around the split core 7.

[0051] The winding portion 14 also includes a servo motor (not shown) for rotating the rotation mechanism, and a cutting portion (not shown) for cutting the start and end portions to separate them into the start and end portions.

[0052] In this embodiment, the output signal regarding the rotation speed from the servo motor (not shown) is received by the control unit PLC (described later) (see arrow DT1 in Figure 3), and the control unit PLC is configured to be able to grasp the number of rotations of the split core 7 (i.e., the number of times the coil wire 8 is wound).

[0053] However, a separate encoder may be provided to detect the number of rotations of the rotation mechanism (not shown), and the control unit PLC may acquire the detection results of the encoder, thereby enabling the control unit PLC to grasp the number of rotations of the split core 7.

[0054] The length measuring instrument 15 (see FIG. 3) is a measuring instrument that measures the length variation of the shape of the divided cores 7, and is a measuring instrument known as a digital micrometer or a digital caliper. FIG. 6 is a diagram for explaining the main parts of a length measuring instrument 15 according to an embodiment of the present invention. 6 is a plan view showing the shape of the trunk portion around which the coil wire 8 is wound.

[0055] As shown in FIG. 6, although the divided core 7 has curved surfaces at the four corners, it basically has a shape close to a rectangle, and the length of the long side is indicated as L. When the coil wire 8 is wound, it is the portion corresponding to this long side that will be wound long.

[0056] Therefore, in this embodiment, the variation in the length of the long side is measured as the variation in the length of the shape of the divided core 7. Specifically, the length measuring device 15 comprises a base 15A that contacts one end of the split core 7, a drive unit 15B that can move toward and away from the base 15A, and a length calculation unit (not shown) that calculates the distance between the base 15A and the tip of the drive unit 15B based on the distance that the drive unit 15B moves from a reference position before the drive unit 15B is driven until it contacts the split core 7, and this distance becomes the length of the long side of the body of the split core 7 around which the coil wire 8 is wound.

[0057] Then, as shown in FIG. 3, the length measuring device 15 transmits the measured separation length to the control unit PLC as data on the measured length variation of the divided core 7 (see arrow DT2 in FIG. 3).

[0058] The control unit PLC is a so-called sequencer that includes a memory unit (not shown) that stores programs for performing control operations, received data, and results of calculations performed based on the received data, a central processing unit (not shown) that performs the calculations, and a touch panel display unit (not shown) that allows settings to be input, etc. However, it is not limited to a sequencer and may be a PC or the like.

[0059] The control unit PLC functions as a length correction unit that corrects the preset reference length. An example will be given below to make it easier to understand. However, please note that the following examples are merely provided to make the explanation easier to understand.

[0060] For example, the coil wire 8 is wound around the split core 7 32 times to finish. Before starting winding with the winding device 10, the operator touches the display unit to input the length L of the long side of the divided core 7 used as a reference, and the reference length that determines the length of the coil wire 8 supplied from the start of winding that will be used as the starting and ending portions.

[0061] That is, the user inputs a reference supply length for the forming unit 12 to perform start and end processing without forming.

[0062] The split core 7 used as the reference is the split core 7 that is close to the design center in the design, and the split core 7 that is close to the design center is used to actually perform winding, and data is collected to measure the supply length from the start of winding to perform start and end processing, and the reference length is determined. Furthermore, the operator touches the display unit to input the number of times the coil wire 8 is to be wound around the split core 7.

[0063] Furthermore, this input (the length of the long side of the split core 7 used as a reference, L, the reference length, and the number of windings) only needs to be input once at the beginning if the work of winding the coil wire 8 around the split core 7 of the same design is to be repeated.

[0064] Then, the operator sets the split core 7 onto which the coil wire 8 is about to be wound in the length measuring instrument 15, and causes the length measuring instrument 15 to measure the length variation of the shape of the split core 7.

[0065] Then, the length measuring device 15 transmits data on the measured length variation, that is, data on the long side length of the set divided core 7, to the control unit PLC (see arrow DT2 in FIG. 3).

[0066] Then, when the operator sets the split core 7 on the rotation mechanism (not shown) of the winding section 14 and starts winding the winding device 10, the control unit PLC issues a command to the servo motor (not shown) of the winding section 14 to start rotating and a command to the encoder ENC to start measuring the supply length of the coil wire 8.

[0067] The control unit PLC also functions as a length correction unit, correcting the previously described reference length that is set in advance. FIG. 7 is a diagram illustrating the content of correction performed by the length correction unit according to the embodiment of the present invention. In Figure 7, the body of the split core 7 measured earlier with the length measuring device 15 is shown by a solid line, the position of the left short side of the split core 7 used as the reference is aligned, and the position of the right end side is shown by a dotted line.

[0068] In this example, the split core 7 onto which the coil wire 8 is about to be wound has a larger outer diameter within the range of manufacturing tolerances than the reference split core 7, i.e., the long side of the split core 7 is longer, and this length is designated as L'.

[0069] The control unit PLC, which functions as a length correction unit, calculates a value ΔL (=L′−L) by subtracting the long side length L of the divided core 7 used as a reference from the measured length L′.

[0070] Regarding this value δL, since there are two long sides in the split core 7, a deviation of 2×δL in length occurs in one winding. And in this example, since the number of windings is 32, this deviation occurs 32 times. Therefore, overall, a deviation of 32×2×δL in length occurs.

[0071] In this way, as a length correction unit, the control unit PLC calculates the overall length deviation amount based on the measured length variation of the shape of the split core 7, and obtains a corrected reference length by adding it to a preset reference length, thereby performing a correction process.

[0072] In addition, as in this example, when L’>L, since the required length of the coil wire 8 required for winding shifts in the direction of increasing length, it can be corrected by adding it to a predetermined length as described above.

[0073] Conversely, when L’<L, the required length of the coil wire 8 required for winding becomes shorter. In this case, since the calculation result of the value δL is a negative value, it can still be corrected by adding it to a predetermined length as described above.

[0074] When winding starts, based on the output signal regarding the rotational speed (refer to the arrow DT1 in FIG. 3) sequentially transmitted from a servo motor (not shown), the control unit PLC monitors how many rotations the split core 7 has made, that is, the number of windings of the split core 7, and also monitors the measurement result of the measured supply length sequentially transmitted from the encoder ENC (refer to the arrow DT3 in FIG. 3).

[0075] Then, when the supply length of the coil wire 8 supplied from the start of winding reaches the corrected reference length, the control unit PLC issues a command (refer to the dotted arrow CM in FIG. 3) to execute the start and end processing without forming in the forming unit 12.

[0076] Then, upon receiving a command to execute the start and end termination processing, the forming unit 12 drives a drive mechanism (not shown) to increase the distance between the upper roller and the lower roller and the distance between the left roller and the right roller, so that the round coil wire 8 passes through without being formed.

[0077] In this way, the forming unit 12 performs start and end termination processing on the portions of the coil wire 8 corresponding to the start and end terminals of the divided core 7 without forming them.

[0078] In addition, the control unit PLC continues to monitor the supply length even after issuing a command to execute the start and end terminal processing, and after issuing the command to execute the start and end terminal processing, issues a command to the forming unit 12 to execute the forming process (see dotted arrow CM in Figure 3) when the coil wire 8 has been supplied for the length of the start and end terminal portions.

[0079] Upon receiving a command to execute the forming process, the forming unit 12 drives a drive mechanism (not shown) to narrow the distance between the upper roller and the lower roller and the distance between the left roller and the right roller, thereby forming the round coil wire 8 into a rectangular shape.

[0080] In this manner, the forming unit 12 performs a forming process to form the coil wire 8 corresponding to the portion to be wound around the split core 7. When the winding number reaches 32 and stops, it usually stops while the forming process is in progress, so the next winding starts from the same state where the forming process is in progress.

[0081] Then, when the number of rotations (number of windings) of the split core 7 reaches 32, the control unit PLC sends a command to the winding unit 14 to end the winding, and upon receiving this command, the winding unit 14 stops the rotation and operates the cutting unit (not shown) to perform a cutting process in which the start and end portions are cut into the start and end portions.

[0082] In this way, even if the shape of the split core 7 varies from the ideal shape of the split core 7 close to the design center due to manufacturing tolerances, as in this embodiment, the reference length for the timing of switching the start and end terminals in the case of a split core 7 close to the design center is corrected to reduce the effect of that variation, and the timing of switching the start and end terminals is controlled by the corrected reference length after the correction, so that the start and end terminal portions can be formed at appropriate positions.

[0083] Therefore, the winding method using the winding device 10 of this embodiment includes a start / end step in which the portions of the coil wire 8 corresponding to the start and end of the split core 7 are not shaped but remain round, and a shaping step in which the coil wire 8 corresponding to the portion to be wound around the split core 7 is shaped into a rectangular shape.The start / end step is a winding method that is performed when the length of the coil wire 8 supplied from the start of winding reaches a corrected standard length that is a corrected standard length that is preset based on the shape variation of the split core 7, making it less susceptible to the effects of variations in manufacturing tolerances of the split core 7, and as a result, the start / end portions can be formed in appropriate positions.

[0084] In the embodiment, the length of the long side is measured and used for correction because it is easy to measure, but it goes without saying that the circumference may also be measured and used for correction.

[0085] Although the present invention has been described above based on specific embodiments, the present invention is not limited to the above embodiments.

[0086] For example, although the tension adjusting unit 13 is shown as using two tension rollers, it may be provided with three or more tension rollers. In this case too, it is preferable that the tension rollers are all drive rollers that are driven synchronously.

[0087] In this way, the content that can be understood from the embodiments, as well as modifications and improvements to the embodiments, are included in the technical scope of the invention, and this is clear to those skilled in the art from the description of the claims. [Explanation of symbols]

[0088] 1...brushless motor, 2...stator, 3...rotor, 4...stator core, 5...insulator, 6...coil, 7...split core, 8...coil wire, 8A, 8B...part, 10...winding device, 11...wire supply section, 12...forming section, 12A...first forming section, 12B...second forming section, 13...tension adjustment section, 13A...first tension roller, 13B...second tension roller, 14...winding section, 15...length measuring device, 15A...base, 15B...drive section, E1...turntable, E2...optical sensor, ENC...encoder, L, L'...length, NZ...nozzle, PLC...control section, R...roller, S...slit

Claims

1. A winding device for winding a wire around a winding target, The winding device includes: a length correction unit that corrects a preset reference length; a wire supply unit that supplies the round wire; a forming section provided downstream of the wire rod supply section and configured to form the wire rod into a rectangular shape; a winding section provided downstream of the forming section and configured to wind the wire around the winding target, The molding portion is a start / end termination process in which no shaping is performed on portions of the wire corresponding to the start and end terminals of the winding target; a forming process for forming the wire corresponding to the portion to be wound around the winding target; the length correction unit performs a correction process to obtain a corrected reference length by correcting the reference length based on a shape variation of the winding object, The winding device, wherein the start / end termination processing is performed when the length of the wire fed from the start of winding reaches the correction reference length.

2. the winding device includes a length measuring device that measures the length variation of the shape of the winding object, The winding device according to claim 1 , wherein the correction process corrects the reference length based on the measured length variation.

3. the winding device includes a detection unit provided between the forming unit and the winding unit, and a supply length measurement unit that measures the supplied length of the wire rod; The detection unit a roller that rotates in contact with the wire; a rotating disk having slits at equal intervals in a circumferential direction and provided on a rotation shaft of the roller; 3. The winding device according to claim 1, further comprising a passage sensor that detects passage of the rotating disk through the slit in a non-contact manner.

4. A winding method for winding a wire around a winding target, comprising: The winding method includes: a start / end step of leaving the portions of the wire rod corresponding to the start and end terminals of the winding target as round without forming them; a forming step of forming the wire rod corresponding to the portion to be wound around the winding target into a rectangular shape, The winding method, wherein the start / end termination steps are performed when the length of the wire rod supplied from the start of winding reaches a corrected reference length obtained by correcting a preset reference length based on shape variations of the winding target.

Images