JP4853265B2 - Varnish processing apparatus and varnish processing method - Google Patents

Description

  The present invention relates to a varnish treatment apparatus and a varnish treatment method for performing a varnish treatment on a winding body. More specifically, the present invention relates to a varnish treatment apparatus and a varnish treatment method for carrying out varnish treatment (dripping, curing, cooling, etc.) while rotating a winding body to a plurality of treatment stations.

  Conventionally, various techniques for performing a varnish treatment on a winding body (for example, a stator coil mounted on a stator core) have been proposed. For example, as one of them, an endless chain having a rotor (winding body) mounting spindle, a drive mechanism for intermittently feeding or revolving the endless chain, and rotating or rotating the rotor mounting spindle There is a varnish processing device having a driving mechanism (Patent Document 1).

In this varnish processing device, the rotor is mounted on the rotor mounting spindle, the endless chain is rotated intermittently and revolved in the furnace, the rotor is preheated to a certain degree, and then the varnish is dropped onto the rotor to support the rotor mounting spindle. Is rotated and the rotor after dropping the varnish is impregnated so as to penetrate inside while rotating the rotor. Further, the inside of the furnace is intermittently fed by an endless chain, and the varnish impregnated in the rotor is gradually dried by being conveyed to each processing station in the furnace.
No. 6-44300

  However, in the varnish processing technique described above, the rotation and revolution of the winding body (rotor) are performed by chain driving by a motor, respectively, so when moving each processing station (revolving the winding body), Since the chains are driven simultaneously, there is a problem that the rotational speed of the winding body changes. Specifically, for example, as shown in FIG. 7, the rotation speed increases during the revolution period.

  Here, the rotation speed of the winding body is set (fixed) to a predetermined rotation speed at which the varnish does not exude from the winding body. This is because, as shown in FIG. 8, the varnish trimming (removal) time is the shortest at a predetermined rotational speed X (rpm).

  And if the rotation speed of the winding which performs a varnish process will change, it will have a bad influence on a varnish process. That is, when the rotational speed of the winding body increases (becomes faster), the varnish exudes from the winding body due to centrifugal force and scatters. On the contrary, when the rotation speed of the winding body decreases (becomes slower), the varnish exudes from the winding body due to gravity. For this reason, when the rotation speed of the winding body changes, not only the optimum amount of varnish cannot be impregnated into the winding body, but also the portion that exudes from the winding body and does not need varnish impregnation (for example, The trimming (removal) time of the varnish that has adhered to and hardened on the motor case mounting portion becomes longer, leading to a decrease in production efficiency and an increase in manufacturing cost.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a varnish treatment apparatus and a varnish treatment method capable of keeping the rotation speed of a winding body constant when moving each processing station. The issue is to provide.

  A varnish treatment device according to the present invention made to solve the above-described problems includes a first endless chain, a plurality of holding shafts arranged at a predetermined interval on the first endless chain and holding a winding body. A second endless chain meshed with a sprocket provided on the holding shaft, and while rotating the winding body held on the holding shaft, the winding body is revolved to intermittently move a plurality of processing stations. In the varnish processing apparatus that performs varnish processing on the winding body, a rotation driving mechanism that rotationally drives the second endless chain to rotate the winding body held on the holding shaft at a constant rotation speed; A revolving drive mechanism for rotationally driving the first endless chain to revolve the winding body held by the holding shaft in order to intermittently move between the plurality of processing stations; A rotation speed adjustment means for adjusting the rotation speed of the winding body by the rotation drive mechanism, and the rotation speed adjustment means, while revolving the winding body by the revolution drive mechanism, The drive frequency in the rotation drive mechanism is changed so that the rotation speed of the winding body does not change.

In this varnish processing apparatus, the second endless chain is rotationally driven by the rotation driving mechanism, and the winding body that is held on the holding shaft and is varnished is rotated at a constant rotational speed. The fixed number of rotations (automatic rotation number) of the winding body is set to a number of rotations at which the varnish dripped and impregnated into the winding body does not ooze out. And the winding body is rotated by the rotation drive mechanism at least until the varnish is cured.
Here, the varnish treatment includes a heat retention (preheating) step, a dripping step, a curing step, and a cooling step. In this varnish treatment apparatus, each treatment in each step is performed for each treatment station. It has become. For this reason, this varnish processing apparatus is equipped with a revolution drive mechanism, and the first endless chain is rotationally driven by this revolution drive mechanism, and the winding body is intermittently moved to a processing station where the next process is performed. Be made.

  Therefore, when the winding body moves between the processing stations, the rotation of the winding body by the rotation driving mechanism and the revolution of the winding body by the revolution driving mechanism are performed simultaneously. That is, the first endless chain and the second endless chain are driven to rotate simultaneously. For this reason, the rotation speed of the winding body changes under the influence of revolution. Specifically, if the rotation directions of the first endless chain and the second endless chain are opposite directions, the rotation speed of the winding body increases. On the other hand, if the rotation directions of the first endless chain and the second endless chain are the same direction, the rotational speed of the winding body decreases. Then, when the rotation speed of the winding body increases (becomes faster), the varnish exudes from the winding body due to centrifugal force and scatters. Conversely, when the rotational speed of the winding body decreases (becomes slower), the varnish exudes from the winding body due to gravity.

  On the other hand, in this varnish processing apparatus, the rotation speed of the winding body by the rotation drive mechanism is adjusted by the rotation speed adjustment means. That is, the rotation speed adjusting means changes the drive frequency of the rotation drive mechanism so that the rotation speed of the winding body does not change while the winding body is being revolved by the revolution drive mechanism.

  Specifically, the rotation speed adjusting means is configured to obtain a frequency corresponding to a rotation speed at which the rotation speed of the winding body is changed by the operation of the revolution drive mechanism, to obtain the constant rotation speed. What is necessary is just to change the drive frequency in the said rotation drive mechanism by subtracting or adding to.

  Thereby, irrespective of the revolution of the winding body, the rotation speed of the winding body can be kept constant. For this reason, it is possible to prevent the varnish from seeping out from the winding body. As a result, the optimum amount of varnish can be impregnated into the winding body, and the varnish trimming operation is not required, thereby preventing a reduction in production efficiency and an increase in manufacturing cost. Further, since the rotation speed of the winding body can be kept constant regardless of the revolution of the winding body, variations in the amount of varnish impregnation into the winding body can be reduced. Furthermore, since the varnish is prevented from seeping out from the winding body, the amount of varnish used can be minimized.

  In the varnish processing apparatus according to the present invention, the varnish processing device further includes deceleration detection means for detecting that the revolution speed of the winding body by the revolution drive mechanism is reduced, and the rotation speed adjusting means is the deceleration detection means. When the deceleration of the revolution speed is detected, the drive frequency in the rotation drive mechanism is gradually increased or decreased after subtracting or adding the frequency corresponding to the changed number of revolutions, and when the revolution is stopped, It is desirable to use a frequency for obtaining a constant rotational speed.

  In this varnish processing device, when the revolution of the winding body by the revolution drive mechanism is stopped, the revolution speed of the winding body is decelerated and then stopped. Such deceleration is performed not only for accurately stopping the winding body at a predetermined stop position, but also for reducing the inertial force at the time of stopping and reducing the burden on the apparatus. However, if the drive frequency in the rotation drive mechanism is the same as before the revolution speed reduction after the revolution speed reduction is started, the rotation speed of the winding body cannot be kept constant. This is because the amount of fluctuation (increase / decrease) in the rotational speed due to revolution before and after deceleration is different.

  On the other hand, in this varnish processing device, when deceleration of the revolution speed is detected by the deceleration detection means, the drive frequency in the rotation drive mechanism is subtracted or added at the start of revolution by the rotation speed adjusting means. The frequency is gradually increased or decreased from when the revolution is stopped, and is set to a frequency for obtaining a constant rotational speed. Thus, since the drive frequency in a rotation drive mechanism is changed gradually with the change of the rotation speed accompanying deceleration of revolution speed, the rotation speed of a winding body is kept constant.

  Thereby, even if it is a case where it decelerates before the revolution stop of a winding body, the rotation speed of a winding body can be kept constant. Therefore, it is possible to prevent the varnish from seeping out from the winding body. As a result, the optimum amount of varnish can be impregnated into the winding body, and the varnish trimming operation is not required, thereby preventing a reduction in production efficiency and an increase in manufacturing cost.

  In the varnish processing method according to the present invention made to solve the above-described problem, a plurality of holding shafts for holding a winding body are arranged at predetermined intervals on a first endless chain, and a second is applied to a sprocket provided on the holding shaft. The endless chain is engaged, the second endless chain is driven by the rotation driving mechanism to rotate the winding body at a constant rotation speed, and the first endless chain is driven by the revolution driving mechanism to In the varnish processing method of performing varnish processing on the winding body by revolving so as to move intermittently between a plurality of processing stations, the winding is performed while the winding body is revolving by the revolving drive mechanism. The drive frequency of the rotation drive mechanism is changed so that the rotation speed of the linear body does not change.

  In this varnish processing method, the winding body held on the holding shaft is rotated at a constant rotation speed by the rotation driving mechanism, and the winding body is intermittently moved between a plurality of processing stations by the revolution driving mechanism. Revolve as you do. And while revolving a winding body by a revolution drive mechanism, the drive frequency in a rotation drive mechanism is changed so that the rotation speed of a winding body may not change.

  Specifically, a frequency corresponding to the rotational speed at which the rotation speed of the winding body is changed by the operation of the revolution driving mechanism is subtracted or added to the driving frequency for obtaining the constant rotational speed. Thus, the drive frequency in the rotation drive mechanism may be changed.

  Thereby, irrespective of the revolution of the winding body, the rotation speed of the winding body can be kept constant. For this reason, it is possible to prevent the varnish from seeping out from the winding body. As a result, the optimum amount of varnish can be impregnated into the winding body, and the varnish trimming operation is not required, thereby preventing a reduction in production efficiency and an increase in manufacturing cost. Further, since the rotation speed of the winding body can be kept constant regardless of the revolution of the winding body, variations in the amount of varnish impregnation into the winding body can be reduced. Furthermore, since the varnish is prevented from seeping out from the winding body, the amount of varnish used can be minimized.

  In the varnish processing method according to the present invention, when the revolution is stopped after decelerating the revolution speed of the winding body by the revolution drive mechanism, the rotation is reduced when the revolution speed reduction by the revolution drive mechanism is started. The drive frequency in the drive mechanism is gradually increased or decreased from the drive frequency after subtracting or adding the frequency corresponding to the number of revolutions changed by the operation of the revolution drive mechanism to obtain the constant revolution number when the revolution is stopped. It is desirable to set the frequency for

  In this varnish processing method, after the revolution speed is reduced, the drive frequency in the rotation drive mechanism is gradually increased or decreased from the drive frequency after the frequency corresponding to the number of revolutions changed at the start of revolution is subtracted or added. The frequency is used to obtain a fixed number of revolutions when the revolution is stopped. Thereby, since the drive frequency in a rotation drive mechanism changes gradually with the change of the rotation speed accompanying deceleration of a revolution speed, the rotation speed of a winding body can be kept constant.

  Therefore, even when the deceleration is performed before the revolution of the winding body is stopped, the rotation speed of the winding body can be kept constant. Therefore, it is possible to prevent the varnish from seeping out from the winding body. As a result, the optimum amount of varnish can be impregnated into the winding body, and the varnish trimming operation is not required, thereby preventing a reduction in production efficiency and an increase in manufacturing cost.

  According to the varnish treatment device and the varnish treatment method of the present invention, as described above, the rotation speed of the winding body can be kept constant regardless of the revolution of the winding body. As a result, it is possible to prevent the varnish from seeping out from the winding body, so that an optimum amount of varnish can be impregnated into the winding body, and the trimming work of the varnish becomes unnecessary, resulting in a decrease in production efficiency. And an increase in manufacturing cost can be prevented. Further, since the rotation speed of the winding body can be kept constant regardless of the revolution of the winding body, variations in the amount of varnish impregnation into the winding body can be reduced. Furthermore, since the varnish is prevented from seeping out from the winding body, the amount of varnish used can be minimized.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a most preferred embodiment that embodies a varnish treatment apparatus and a varnish treatment method of the present invention will be described in detail based on the drawings. Therefore, first, a schematic configuration of the varnish processing apparatus according to the present embodiment will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram showing an outline of a varnish treatment apparatus according to the present embodiment. FIG. 2 is a schematic configuration diagram showing an outline of a stator transport unit in the varnish processing apparatus according to the present embodiment. FIG. 3 is a schematic configuration diagram showing an outline of a plurality of stator holding portions provided in the stator conveying portion. FIG. 4 is an arrow view from the AA direction shown in FIG.

As shown in FIG. 1, the varnish processing apparatus 10 includes a main body 11 partitioned into a plurality of spaces, a stator transport unit 12 for sequentially moving the partitioned spaces while rotating the stator W as a workpiece, And a control unit 13 for comprehensively controlling the operation of the varnish processing apparatus 10.
The main body 11 includes a detaching station 14 for detaching the stator W from the stator conveying section 12, a heat retaining station 15 for preheating the stator, a dropping station 16 for dripping and impregnating the varnish into the preheated stator W, a stator A curing station 17 that cures the varnish dripped and impregnated into W and a cooling station 18 that cools the stator W after the varnish is cured are provided. Among these stations, only the desorption station 14 is a partially opened space, and the other heat retaining station 15, the dropping station 16, the curing station 17 and the cooling station 18 are closed spaces.

Here, at the attachment / detachment station 14, the stator W before the varnish treatment is mounted on the stator conveyance unit 12, and the stator W after the varnish treatment is removed from the stator conveyance unit 12. In addition, a control unit 13 is disposed above the detachable station 14.
The heat retention station 15 is heated by far-red by a heater (not shown). Thereby, in the heat retention station 15, the stator W preliminarily heated in the previous process can be kept at a predetermined temperature. The reason for keeping the stator W warm is to improve the permeability of the dropped varnish (lower the viscosity of the varnish).
The dropping station 16 is provided with a dropping nozzle 19 connected to a varnish supply pump (not shown), and the varnish is dropped from the dropping nozzle 19 to the stator W. And the varnish dripped at the stator W impregnates the coil of the stator W.
The curing station 17 is provided with a heater 20 at the top. Thereby, in the first half (upper part) of the curing station 17, the stator W is heated by the heater 20, and the varnish impregnated in the coil of the stator W is gelled. The gelled varnish is cured in the latter half (lower part) of the curing station 17.

  And the stator conveyance part 12 is arrange | positioned in the main body 11 so that these each stations 14-18 may be passed. As shown in FIG. 2, the stator transport unit 12 holds an endless revolving chain 30, an endless revolving chain 40 disposed on the inner peripheral side of the revolving chain 30, and a stator W. A plurality of stator holding portions 50, a deceleration limit switch 60, and a stop position confirmation limit switch 61 are provided. Two revolution chains 30 are provided, and a rotation chain 40 is disposed between them (see FIG. 3). The stator holding portion 50 is arranged (revolved) in the revolving chain 30 at predetermined intervals, and the holding shaft 52 is rotated (revolved) by the revolving chain 40. That is, the stator conveyance unit 12 can revolve the stator W while rotating. The deceleration limit switch 60, which is a deceleration detection means, detects the deceleration of the revolution speed of the stator W, and the stop position confirmation limit switch 61 detects the arrival of the stator W at the stop position. In the present embodiment, 18 stator holding portions 50 are arranged in the revolution chain 30.

Here, as shown in FIGS. 3 and 4, the stator holding unit 50 includes a pallet 51, a holding shaft 52, a sprocket 53, and a chuck 54. Revolution chains 30 are arranged (fixed) at both ends of the pallet 51.
A holding shaft 52 supported rotatably is provided on the pallet 51, and a chuck 54 for holding the stator W from the inner peripheral side is attached to one end of the holding shaft 52. A sprocket 53 is fixed to the holding shaft 52. When the pallet 51 is arranged on the revolving chain 30, the teeth of the sprocket 53 are engaged with the revolving chain 40.
With such a configuration, the stator holding portion 50 can be revolved while rotating while holding the stator W.

  As shown in FIG. 2, the revolving chain 30 is hung on a driving roller 31 and a driven roller 32. A drive belt 35 is stretched between the drive roller 31 and a pulley fixed to the output shaft of the revolution motor 34. Accordingly, when the revolution motor 34 is driven, the rotation of the revolution motor 34 is transmitted to the drive roller 31 via the drive belt 35. The revolving chain 30 is driven by the drive roller 31 being driven to rotate. By driving the revolving chain 30, the stator W held by the stator holding portion 50 is revolved in the varnish processing apparatus 10, so that the processing stations 14 to 18 are intermittently moved. That is, the “revolution drive mechanism” of the present invention is constituted by the revolution chain 30, the drive roller 31, the driven roller 32, the revolution motor 34, and the stator holding portion 50.

  The rotation chain 40 is hung on a driving roller 41 and two driven rollers 42 and 43. A driving belt 45 is stretched between the driving roller 41 and a pulley (not shown) fixed to the output shaft of the motor 44 for rotation. Thus, when the rotation motor 44 is driven, the rotation of the rotation motor 44 is transmitted to the drive roller 41 via the drive belt 45, and the rotation is driven by the rotation of the drive roller 41. The chain 40 is driven. By driving the rotation chain 40, the stator W held by the stator holding portion 50 rotates. Then, by changing the rotation speed (output) of the rotation motor 44 by the control unit 13, the rotation speed of the stator W held by the stator holding unit 50 can be adjusted. That is, the “rotation drive mechanism” of the present invention is configured by the rotation chain 40, the drive roller 41, the driven rollers 42 and 43, the rotation motor 44, and the stator holding unit 50, and the control unit 13 performs the “rotation rotation” This corresponds to “number adjusting means”.

  In the varnish processing device 10, the control unit 13 controls the rotation drive and the number of rotations of the revolution motor 34 and the rotation motor 44, and the stator W held by the stator holding unit 50 passes through the varnish processing device 10. While always rotating at a constant rotational speed, it revolves at an appropriate timing to perform varnish treatment.

  Then, the varnish processing method by the varnish processing apparatus 10 which has an above-described structure is demonstrated, referring FIG. 5 and FIG. FIG. 5 is a flowchart showing the contents of the rotation speed control of the stator during the varnish treatment by the varnish treatment apparatus 10. FIG. 6 is a timing chart showing changes in the rotation speed and drive frequency when the rotation speed control of the stator is performed during varnish processing by the varnish processing apparatus 10.

First, in the detaching station 14, the stator W is attached and fixed to the chuck 54 of the holding shaft 52. Then, when the start button is pressed, the rotation motor 44 is driven by the control unit 13. Then, the rotation of the rotation motor 44 is transmitted to the drive roller 41 via the drive belt 45, and the rotation chain 40 is driven counterclockwise. When the rotation chain 40 is driven counterclockwise, the holding shaft 52 rotates clockwise via the sprocket 53 of the stator holding portion 50 (S1). At this time, as shown in FIG. 6, the rotation speed of the holding shaft 52 is X (rpm). That is, the stator W rotates at a rotational speed X (rpm) at which the varnish does not ooze out from the coil when the varnish is dripped and impregnated into the coil.
Note that the holding shafts 52 of the three stator holding portions 50 located at the detaching station 14 do not rotate. This is because the sprockets 53 of these stator holding portions 50 are not engaged with the rotation chain 40.

  Then, at time t1 shown in FIG. 6, the rotation of the revolution motor 34 is transmitted to the drive roller 31 via the drive belt 35, and the revolution chain 30 is driven in the clockwise direction. When the revolving chain 30 is driven, the pallet 51 (stator holding portion 50) fixed to the revolving chain 30 moves (S2). By this revolution, for example, the stator holding portion 50 to which the stator W is attached at the detaching station 14 is sent to the heat retaining station 15.

  The revolving chain 30 is driven intermittently while rotating the stator W held on the holding shaft 52, so that the heat retaining station 15, the dropping station 16, the curing station 17, and the cooling station are rotated while the stator W rotates. The varnish processing is performed by sequentially moving 18. Then, the stator W that has been subjected to the varnish treatment is removed from the stator holding portion at the detachment station 14. In the varnish treatment apparatus 10, the revolution speed is reduced before the drive of the revolution chain 30 is stopped in order to accurately stop the stator W (the stator holding portion 50) after the varnish treatment at a predetermined position.

Here, when the revolving chain 30 is driven and the stator holding portion 50 moves at time t1, the rotation speed of the holding shaft 52 (the rotation speed of the stator W) changes as shown by the broken line in FIG. End up. Specifically, when the driving directions of the chains are opposite as in the present embodiment, the rotation speed of the holding shaft 52 (the rotation speed of the stator W) increases and “Y (rpm) "Become. If it does so, the rotation speed X (rpm) set so that a varnish may not exude from the coil of the stator W will no longer be maintained. As a result, the varnish oozes out from the coil of the stator W due to centrifugal force and scatters, and the trimming (removal) time of the varnish becomes longer, leading to a decrease in production efficiency and an increase in manufacturing cost.
When the drive directions of the chains are the same, the rotation speed of the holding shaft 52 (the rotation speed of the stator W) decreases, and the rotation speed X (rpm) cannot be maintained. As a result, the varnish oozes out from the stator due to gravity, and the trimming (removal) time of the varnish becomes longer, leading to a decrease in production efficiency and an increase in manufacturing cost.

  However, in this embodiment, when the revolution drive is started, the rotation speed control is performed by the control unit 13 (S3). Specifically, as shown in FIG. 6, at the time t <b> 1, as shown in FIG. 6, a drive frequency necessary for obtaining the rotation speed X (rpm) (the drive frequency given to the rotation motor 44 in S <b> 1). ) A frequency corresponding to “YX (rpm)” is subtracted from fx by the amount of change in the rotation speed of the revolution due to revolution drive to obtain fxy. Then, after time t1, the subtracted drive frequency fxy is supplied to the motor 44 for rotation. As a result, the rotation speed of the holding shaft 52 (stator W) is increased because the rotation speed of the holding shaft 52 (stator W) by the rotation motor 44 is decreased by the change rotation speed of the rotation speed due to revolution driving. It is kept at X (rpm).

  Therefore, even while the revolution chain 30 is being driven, the rotation speed of the holding shaft 52 (stator W) is constant at X (rpm), so that the varnish oozes out from the coil of the stator W. Can be prevented. As a result, the coil of the stator W can be impregnated with the optimum amount of varnish, and the trimming time of the varnish is minimized (unnecessary in some cases), thereby preventing a decrease in production efficiency and an increase in manufacturing cost. . Further, variation in the amount of varnish impregnated in the coil of the stator W can be reduced. Further, since the varnish is prevented from seeping out from the coil of the stator W, the amount of varnish used can be minimized.

  After the revolving chain 30 is driven at time t1, when the stator holding part 50 reaches the deceleration position at time t2, the deceleration limit switch 60 is turned on (S4). The output of the deceleration limit switch 60 is input to the control unit 13, and the rotation speed of the revolution motor 34 is reduced by the control unit 13. Thereby, the revolution speed of the revolution chain 30 is reduced (S5).

  Here, even after starting the deceleration of the revolution speed of the revolution chain 30, if the same drive frequency fxy as that before the deceleration is given to the motor 44 for rotation, the rotation speed of the holding shaft 52 (stator W) Cannot be maintained at X (rpm). This is because the amount of change in the rotational speed of the revolution due to revolution differs (increase / decrease: an increase in this embodiment) before and after the revolution speed is reduced.

However, in the present embodiment, when the revolution speed of the revolution chain 30 is reduced (the deceleration limit switch 60 is turned on), the control unit 13 performs the change control of the drive frequency applied to the rotation motor 44. Implemented (S6). That is, when the revolution speed of the revolution chain 30 is decelerated at time t2, the drive frequency applied to the revolution motor 44 becomes fx when the revolution chain 30 stops as shown in FIG. In addition, the driving frequency fxy changed at the start of revolution (at time t1) is gradually increased.
When the stator holding portion 50 reaches the stop position at time t3, the stop position confirmation limit switch 61 is turned on (S7). The output of the stop position confirmation limit switch 61 is input to the control unit 13, and the revolution motor 34 is stopped by the control unit 13 and the revolution of the revolution chain 30 is stopped (S8). At this time, the drive frequency applied to the rotation motor 44 gradually increases from the drive frequency fxy at time t2, and is returned to fx at time t3. And in this state, the rotation control by the control part 13 is complete | finished (S9). Thereafter, when the revolving chain is driven, the above-described processing is repeatedly performed.

  As described above, in the present embodiment, even after the revolution speed of the revolution chain 30 is reduced, the drive frequency given to the revolution motor 44 is gradually increased in accordance with the change in the revolution speed accompanying the reduction in the revolution speed. Therefore, the rotation speed of the holding shaft 52 (stator W) can be maintained at X (rpm). Thereby, it is possible to prevent the varnish from seeping out from the coil of the stator W even after the revolution speed of the revolution chain 30 is reduced.

  As described above in detail, in the varnish processing method by the varnish processing apparatus 10 according to the present embodiment, when the revolving chain 30 is driven, the driving frequency of the rotation motor 44 is changed by the control unit 13 to the holding shaft. From the drive frequency fx (Hz) required to set the rotation speed of the 52 (stator W) to X (rpm), this corresponds to the change in the rotation speed by driving the revolution chain 30 “YX (rpm)”. It is set to fxy (Hz) which subtracted the frequency from fx (Hz). As a result, the rotation speed of the holding shaft 52 (stator W) is reduced by an amount corresponding to an increase in the rotation speed due to the revolution drive because the rotation speed of the holding shaft 52 (stator W) by the rotation motor 44 is reduced. It is kept at X (rpm) without becoming high during the revolution period of driving.

  Therefore, even during the revolution period, the rotation speed of the holding shaft 52 (stator W) can be kept constant, so that the varnish can be prevented from seeping out from the coil of the stator W during the varnish treatment. . As a result, the varnish of the stator W can be impregnated with the optimum amount of varnish, and the trimming time of the varnish is minimized (unnecessary in some cases), thereby preventing a decrease in production efficiency and an increase in manufacturing cost. . Further, variation in the amount of varnish impregnated in the coil of the stator W can be reduced. Further, since the varnish is prevented from seeping out from the coil of the stator W, the amount of varnish used can be minimized.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the rotation directions of the revolution chain 30 and the rotation chain 40 are reversed, but the rotation directions of the revolution chain 30 and the rotation chain 40 may be the same. In this case, since the rotation speed decreases due to the revolution, a drive frequency obtained by adding a frequency corresponding to the change may be given to the rotation motor 44. In addition, after the revolution speed of the revolution chain 30 is reduced, the drive frequency applied to the rotation motor 44 may be gradually decreased from the drive frequency added at the start of revolution. Thereby, even if the rotation direction of the revolution chain 30 and the rotation chain 40 is the same, the rotation speed of the holding shaft 52 (stator W) can be kept constant.

It is a schematic block diagram which shows the outline of the varnish processing apparatus which concerns on embodiment. It is a schematic block diagram which shows the outline of the stator conveyance part in the varnish processing apparatus which concerns on embodiment. It is a schematic block diagram which shows the outline of the stator holding | maintenance part provided with two or more by the stator conveyance part. It is an arrow view from the AA direction shown in FIG. It is a flowchart which shows the content of the rotation speed control of the stator at the time of the varnish process by the varnish processing apparatus which concerns on embodiment. It is a timing chart which shows the rotation speed and drive frequency change when the rotation speed control of the stator at the time of the varnish process by the varnish processing apparatus which concerns on embodiment is implemented. It is a figure which shows an example of the rotation speed of a stator at the time of the varnish process in the conventional varnish processing apparatus. It is a figure which shows the relationship between the rotation speed of a stator, and varnish trimming time.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Varnish processing apparatus 11 Main body 12 Stator conveyance part 13 Control part 14 Desorption | desorption station 15 Heat retention station 16 Dripping station 17 Curing station 18 Cooling station 19 Dripping nozzle 20 Heater 30 Revolution chain 31 Drive roller 32 Drive roller 34 Revolution motor 35 Drive belt 40 Rotating Chain 41 Drive Roller 42 Followed Roller 43 Followed Roller 44 Rotating Roller Motor 45 Drive Belt 50 Stator Holding Unit 51 Pallet 52 Holding Shaft 53 Sprocket 54 Chuck 60 Deceleration Limit Switch 61 Stop Position Check Limit Switch W Stator

Claims (6)

A first endless chain, a plurality of holding shafts arranged at predetermined intervals on the first endless chain and holding a winding body; and a second endless chain meshed with a sprocket provided on the holding shaft. Then, while rotating the winding body held on the holding shaft, by revolving the winding body and intermittently moving a plurality of processing stations, a varnish processing apparatus that performs varnish processing on the winding body,
A rotation driving mechanism for rotating the second endless chain to rotate the winding body held on the holding shaft at a constant rotation speed;
A revolution drive mechanism that rotationally drives the first endless chain to revolve the winding body held on the holding shaft in order to intermittently move between the plurality of processing stations;
A rotation speed adjusting means for adjusting the rotation speed of the winding body by the rotation drive mechanism;
The rotation speed adjusting means changes the drive frequency in the rotation drive mechanism so that the rotation speed of the winding body does not change while the winding body is revolved by the revolution drive mechanism. A varnish processing device characterized. In the varnish processing apparatus according to claim 1,
The rotation speed adjusting means subtracts a frequency corresponding to the rotation speed at which the rotation speed of the winding body has changed by the operation of the revolution drive mechanism from the drive frequency for obtaining the constant rotation speed. The varnish processing apparatus characterized by changing the drive frequency in the autorotation drive mechanism by adding. In the varnish processing apparatus according to claim 2,
Further comprising deceleration detection means for detecting that the revolution speed of the winding body by the revolution drive mechanism has been reduced,
The rotation speed adjusting means subtracts or adds a drive frequency in the rotation drive mechanism to a frequency corresponding to the rotation speed changed by the operation of the revolution drive mechanism when the deceleration detection means detects a reduction in revolution speed. A varnish processing apparatus characterized by gradually increasing or decreasing the drive frequency after the rotation to obtain a frequency for obtaining the constant rotation speed when the revolution is stopped. A plurality of holding shafts for holding the winding body are arranged at predetermined intervals on the first endless chain, the second endless chain is engaged with a sprocket provided on the holding shaft, and the second endless chain is driven by a rotation driving mechanism. Then, while rotating the winding body at a constant rotational speed, by driving the first endless chain by a revolving drive mechanism and revolving so that the winding body moves intermittently between a plurality of processing stations, In the varnish treatment method for performing varnish treatment on the winding body,
A varnish treatment method, wherein a drive frequency in the rotation drive mechanism is changed so that a rotation speed of the winding body does not change while the winding body is revolving by the revolution drive mechanism. In the varnish processing method of Claim 4,
The rotation drive is performed by subtracting or adding a frequency corresponding to the rotation speed at which the rotation speed of the winding body is changed by the operation of the revolution drive mechanism to the drive frequency for obtaining the constant rotation speed. A varnish treatment method, wherein the drive frequency in the mechanism is changed. In the varnish processing method of Claim 5,
When stopping the revolution after decelerating the revolution speed of the winding body by the revolution drive mechanism, when the revolution speed reduction by the revolution drive mechanism is started, the drive frequency in the revolution drive mechanism is changed to the revolution speed. It is characterized by gradually increasing or decreasing the driving frequency after subtracting or adding the frequency corresponding to the number of revolutions changed by the operation of the driving mechanism to obtain the constant number of revolutions when the revolution is stopped. Varnish treatment method.

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