JP5398322B2 - Coil end film removal method and apparatus - Google Patents

Description

  The present invention relates to a method and apparatus for removing an enamel film on a coil end.

  A coil used for a reactor or the like is configured by winding a conductive wire (enameled wire) that is covered with an enamel coating. Since this type of coil connects a terminal for energization to a coil end portion which is an end portion in the length direction of an enameled wire, the enamel film on the coil end portion is removed.

  Conventionally, there is a device for removing an enamel film by sandwiching an enamel wire, rotating the enamel wire around its axis, pressing the cutting blade against the enamel wire, and further moving the cutting blade in the axial direction of the enamel wire. It is known (see Patent Document 1).

  In this case, the enamel film is peeled off all around the enamel wire by moving it in the axial direction of the enamel wire while pressing the cutting blade against the enamel wire, and rotating the enamel wire around the axis at this time. .

Japanese Patent Laid-Open No. 10-174239

  However, in the above-described conventional one, the cutting edge is pressed against the enameled wire while rotating the enameled wire around its axis, so that the cross-sectional shape of the enameled wire needs to be circular (round wire). For this reason, when the enamel film of a flat belt-like enamel wire (flat wire) is peeled off with a cutting blade, the enamel wire cannot be rotated and the enamel film cannot be efficiently removed.

  Further, when the cutting blade pressed against the enamel wire is moved in the axial direction of the enamel wire, the enamel wire needs to be clamped relatively strongly in order to prevent the enamel wire from moving together. For this reason, there exists a possibility that the clamping part of an enamel wire may be damaged. Furthermore, since the removal amount of the enamel film changes due to wear of the cutting edge, not only is the enamel film peeling accuracy unstable, but it is also necessary to frequently perform maintenance such as replacement of the cutting edge, so work efficiency Is bad.

  In view of the above points, the present invention is not limited to the case where the shape of the enamel wire is a round wire, and the enamel film on the coil end portion can be reliably and efficiently removed even if it is a flat wire, and the enamel wire It is an object of the present invention to provide a coil end film removing method and apparatus capable of preventing the damage of the coil end and removing the enamel film with high accuracy.

The present invention relates to a coil end film removal method for removing an enamel film from the entire circumference of a coil end part extending outward of a coil body part formed by winding an enamel wire, and having a bottomed tube with one side open A coil housing step in which a coil body portion is housed in a cylindrical case, and a coil end portion is inserted through a through portion formed through the peripheral wall of the case so as to be exposed to the outside of the case. A case closing step of closing the case containing the material with a closing member, and a particle from the direction crossing the extending direction of the coil end portion exposed to the outside of the case closed by the case closing step toward the coil end portion And a blasting process for removing the enamel film on the coil end portion by projecting the coil end. Comprising a change position for changing the posture step, the position changing step, by rotating the casing around an axis which coincides with the extending direction of the extension line of the coil end portion, the coil end to the projection direction of the granules The direction of the part is changed .

  When removing the enamel film from the entire circumference of the coil end portion by the method of the present invention, first, the coil body portion is accommodated in the case by the coil accommodating step. The coil body is accommodated in the case from one side where the case is opened. Next, the case closing step is performed, and the opened side of the case is closed with a closing member. Thereby, the outer periphery of the coil body is covered by the case. On the other hand, the coil end portion is exposed to the outside of the case through the through portion of the case. And a granule is projected toward a coil end part by the said blasting process. Thereby, the enamel film of the coil end portion is removed. At this time, since the posture of the coil end portion is changed with respect to the projection direction of the particles by the posture changing step, the particles can be applied to the entire circumference of the coil end portion exposed to the outside of the case. The enamel film on the entire circumference of the part can be removed.

  As described above, according to the method of the present invention, in the blasting process, the particles are projected toward the coil end portion to remove the enamel film on the coil end portion, so that the enamel wire is limited to a round wire. In addition, the enamel film can be reliably removed even with a flat wire.

  Further, since a conventional cutting blade is not used, it is not necessary to sandwich the coil end portion, and the enamel film can be removed without damaging the coil end portion. At this time, the coil end part is exposed to the outside of the case, and the coil body part is reliably masked by the case, so that the enamel film only on the coil end part can be peeled off with high accuracy.

Furthermore, according to the method of the present invention, the posture of the coil end portion can be changed with respect to the projection direction of the granules simply by rotating the case, and the enamel film on the entire circumference of the coil end portion is efficiently removed. be able to.

The present invention also relates to a coil end film removing device for removing the enamel film from the entire circumference of the coil end part extending outward of the coil body part formed by winding the enamel wire, and the coil body part can be accommodated. And a bottomed cylindrical case in which one side of the coil housing part is freely closed by a closing member, and is formed through the peripheral wall of the case so as to be housed in the coil housing part. A through portion that passes through the coil end portion extending from the coil body portion and is exposed to the outside of the case; Blast processing means for removing the enamel film on the coil end portion by projecting the image, and posture changing means for changing the posture of the coil end portion with respect to the projection direction of the particles by the blast processing means Wherein the attitude changing means comprises a rotation shaft connected to the case to match the axis in the extending direction of the extension line of the coil end portion extending from said casing, said casing through said rotation axis And a rotation driving means for rotating .

  With the above configuration, the film removing apparatus of the present invention can cover only the coil end portion by covering the coil body portion with the case, so that only the enamel film on the coil end portion can be reliably removed using the blasting means. can do. Further, by adopting the blasting means, it is possible to remove the film stably and accurately over a relatively long period of time without wear as in the conventional cutting edge. In addition, since the enamel film on the coil end portion is removed by the projection of the particles by the blasting means, there is no need to sandwich the coil end portion as in the case of removing the enamel film by pressing the cutting blade. The enamel film can be removed with high accuracy by preventing damage to the portion.

  Further, since the posture changing means changes the posture of the coil end portion while projecting particles on the coil end portion, the enamel film can be reliably removed over the entire circumference of the coil end portion. The enamel film can be reliably removed not only in the case of a round wire but also in the case of a flat wire.

Furthermore, according to the film removing apparatus of the present invention, the coil end portion extending from the case can be rotated about its axis by connecting the rotating shaft to the case and rotating the case by the rotation driving means. Therefore, the enamel film can be easily removed over the entire circumference of the coil end portion.

  Further, when the pair of coil end portions extend from the coil body portion in different directions, the case includes a pair of the through portions corresponding to the extending positions of the coil end portions, It is preferable to provide a pair of connecting means for detachably connecting the rotating shaft to the side wall on the opposite side of each penetrating part.

  By doing this, the rotating shaft is connected to the case via one connecting means and the case is rotated, so that the blasting means projects the particles onto one coil end portion and the entire outer coil end portion is projected. The enamel film can be removed over the circumference, and then the rotating shaft is connected to the case via the other connecting means and the case is rotated, so that the blasting means causes the granules to be applied to the other coil end portion. Since the enamel film can be removed over the entire circumference of the coil end portion by projecting, even if the pair of coil end portions extend in different directions, the projection direction of the particles by the blast processing means The enamel film on both coil end portions can be efficiently removed without changing the.

  In the film removing apparatus of the present invention, it is preferable that a packing for sealing a space between the through portion and the coil end portion is provided in the through portion of the case. According to this, it can prevent reliably that the granule projected from the said blast processing means penetrate | invades into the inside of a case via the said penetration part.

Explanatory drawing which shows the structure of the film removal apparatus of one Embodiment of this invention. Explanatory drawing which shows the shape of a coil and the structure of a case. Explanatory drawing which shows the film removal operation | work of the coil end part by the film removal apparatus of this embodiment. Explanatory drawing which shows the film removal work following FIG. Explanatory drawing which shows the shape of another coil and the structure of another case.

  An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the film removing apparatus 1 of the present embodiment includes a substantially cubic case 2, a posture changing unit 3 that changes the posture of the case 2, and a blast processing unit 4.

  As shown in FIG. 2, the case 2 is formed of a hard synthetic resin so as to be lightweight, and includes a coil housing portion 6 that houses a coil body portion 5 a of the coil 5 described later, and a lid that closes the coil housing portion 6. And a plate 7 (a closing member).

  The coil 5 is formed of a flat belt-like enameled wire (flat wire), a coil body 5a formed by winding the enameled wire, and a pair of coil end portions 5b extending outward from the coil body 5a. , 5c.

  A part of the peripheral wall of the case 2 is formed with a penetrating portion 8 that exposes one coil end portion 5b when the coil body portion 5a is accommodated in the coil accommodating portion 6. Further, a through-hole 9 that exposes the other coil end portion 5 c is formed in a part of the lid plate 7. Each penetration part 8 and 9 is formed in the shape corresponding to each flat-plate-like coil end part 5b and 5c. Each penetration part 8, 9 is provided with a packing 10 for closing a gap between each coil end part 5 b, 5 c, and further, a metal plate 11 so as to cover the circumference of each penetration part 8, 9. Is attached.

  The lid plate 7 is fastened and fixed to the peripheral wall of the case 2 by a fastening member 12 such as a snap lock and maintains the closed state of the coil housing portion 6.

  As shown in FIG. 1, the blast processing means 4 includes a projection nozzle 4a for projecting an air jet M in which particles are mixed toward one of the coil end portions 5b and 5c exposed from the case 2, and a projection nozzle. 4a, and a jet generating means (not shown) that generates a jet of air with a predetermined air pressure mixed with particles. In addition, although the air pressure which produces | generates the jet flow from the projection nozzle 4a and the material of a granule are selected suitably, in this embodiment, an air pressure shall be 0.5-0.7MPa, Glass beads having a particle size of 300 to 400 μm were used as the particles to be mixed.

  As shown in FIG. 1, the posture changing means 3 is composed of a rotation shaft 3a extending in the horizontal direction and a drive motor (rotation drive means) (not shown) for driving the rotation of the rotation shaft 3a. The distal end of the rotating shaft 3 a is connected to the case 2 via one of a pair of chuck portions 13 and 14 (connecting means) provided on the side wall of the case 2. Although not shown in detail, the chuck portions 13 and 14 detachably connect the rotary shaft 3a to the case 2 by a pair of blocks that open and close grip the rotary shaft 3a.

  One chuck portion 13 is provided on an axis that coincides with an extension line in the extending direction of one coil end portion 5b. The other chuck portion 14 is provided on an axis that coincides with an extension line in the extending direction of the other coil end portion 5c.

  When performing the film removal operation of the coil end portions 5b and 5c with the film removal apparatus 1 configured as described above, first, as shown in FIG. 2, the coil body portion 5a of the coil 5 is placed in the coil housing portion 6 of the case 2. Is closed (coil housing step) and closed by the cover plate 7 (case closing step). At this time, the coil end portions 5 b and 5 c of the coil 5 are exposed from the respective through portions 8 and 9.

  Next, as shown in FIG. 1, the case 2 is connected to the rotating shaft 3 a via a chuck portion 14 provided on the side wall of the case 2. Thereby, the coil end part 5c opposes the projection nozzle 4a.

  Subsequently, a jet M in which particles are mixed is projected from the projection nozzle 4a toward the one coil end portion 5c. As a result, the enamel film on one side of the coil end portion 5c is removed (blast treatment step). At this time, the coil body portion 5a is housed in the coil housing portion 6 of the case 2 and is reliably masked. Therefore, the coil body portion 5a is prevented from being damaged by the granular material, and only the enamel film of the coil end portion 5c is accurately obtained. Can be removed well. Moreover, since the said packing 10 (refer FIG. 2) is provided in the penetration parts 8 and 9, the penetration | invasion of the granule to the inside of the coil accommodating part 6 can be prevented reliably. Furthermore, since the outer wall surface of the case 2 is protected by the metal plate 11, damage to the case 2 due to collision of particles is prevented.

  Further, as shown in FIGS. 3A and 3B, the case 2 is sequentially rotated by the rotation of the rotating shaft 3a so that the other side surface of the coil end portion 5c faces the projection nozzle 4a (posture change). Process). By doing so, the enamel film can be removed over the entire circumferential side surface of the coil end portion 5c without changing the projection direction of the particles by the projection nozzle 4a.

  After the removal of the enamel film on the coil end portion 5c is completed, the connection of the rotating shaft 3a by the chuck portion 14 is released, and the case 2 is connected to the rotating shaft 3a via the chuck portion 13 as shown in FIG. Connect to Thereby, the coil end part 5b opposes the projection nozzle 4a. Then, the enamel film on one side surface of the coil end portion 5b is removed by projecting the particles from the projection nozzle 4a toward the coil end portion 5b. Further, as shown in FIG. 4B, the case 2 is sequentially rotated by the rotation of the rotary shaft 3a so that the other side surface of the coil end portion 5b faces the projection nozzle 4a. Thereby, an enamel film can be removed over the whole peripheral side surface of the coil end part 5b.

  As described above, according to this embodiment, there is no reduction in accuracy due to wear as in the case of using a conventional cutting blade, and the removal amount of the enamel film can be stabilized over a long period of time. Further, the enamel film can be surely removed not only when the enamel wire forming the coil 5 is a round wire but also when it is a flat wire.

  As shown in FIG. 5, when removing the enamel film from another coil 15 in which the extension positions of the coil end portions 15 b and 15 c are different, the other case 16 is used to attach the coil body portion 15 a to the case 16. Can be accommodated. The case 15 shown in FIG. 5 has the same configuration as the case 2 except that the position of the penetrating portion 8 that penetrates the coil end portion 15b and the position of the one chuck portion 13 are different. Description is omitted.

  Even when other cases 16 are used, the coil end portions 15b and 15c are connected to the rotary shaft 3a sequentially through the chuck portions 13 and 14 and the blasting process and the posture changing process described above are performed. The enamel film can be removed over the entire circumferential side surface.

  DESCRIPTION OF SYMBOLS 1 ... Film removal apparatus, 2,16 ... Case, 3 ... Attitude change means, 3a ... Rotary shaft, 4 ... Blast processing means, 5a, 15a ... Coil trunk | drum, 5b, 5c, 15b, 15c ... Coil end part, 6 ... Coil housing part, 7 ... Cover plate (closing member), 8, 9 ... Penetration part, 10 ... Packing, 13, 14 ... Chuck part (connecting means).

Claims (4)

A coil end film removal method for removing an enamel film from the entire circumference of a coil end part extending outward of a coil body formed by winding an enamel wire,
A coil housing step of housing the coil body portion in a bottomed cylindrical case with one side open, and exposing the coil end portion to a through portion formed through the peripheral wall of the case so as to be exposed to the outside of the case;
A case closing step of closing the case containing the coil body portion by the closing member by the coil containing step;
Blasting that removes enamel coating on the coil end portion by projecting particles toward the coil end portion from the direction intersecting the extending direction of the coil end portion exposed to the outside of the case closed by the case closing step Processing steps,
The blast treatment step includes a posture changing step of changing the posture of the coil end portion with respect to the projection direction of the granules ,
In the posture changing step, the orientation of the coil end portion with respect to the projection direction of the granule is changed by rotating the case around an axis line that coincides with an extension line in the extending direction of the coil end portion. Coil end film removal method. A coil end film removing device for removing an enamel film from the entire circumference of a coil end part extending outward of a coil body part formed by winding an enamel wire,
A bottomed cylindrical case in which a coil housing portion capable of housing a coil body portion is formed inside, and one side of the coil housing portion is closed openably by a closing member;
A penetrating portion that is formed through the peripheral wall of the case and extends from a coil body portion that is accommodated in the coil accommodating portion and is exposed to the outside of the case;
A blasting means for removing the enamel film of the coil end part by projecting particles to the coil end part from a direction intersecting the extending direction of the coil end part exposed from the penetrating part;
Posture changing means for changing the posture of the coil end part with respect to the projection direction of the particles by the blast processing means ,
The posture changing means includes a rotation shaft connected to the case with an axis line aligned with an extension line of the coil end portion extending from the case, and a rotation for rotating the case via the rotation shaft. A device for removing a film on a coil end portion, comprising: a driving means . In the coil end portion film removing apparatus according to claim 2 ,
When the pair of coil end portions extend from the coil body portion in different directions, the case includes a pair of penetration portions corresponding to the extension positions of the coil end portions, A coil end portion film removal apparatus comprising a pair of connecting means for detachably connecting the rotating shaft to a side wall on the opposite side of the portion. In the coil end portion film removing apparatus according to claim 2 or 3 ,
An apparatus for removing a coating film from a coil end portion, wherein a packing for sealing between the penetration portion and the coil end portion is provided in the penetration portion of the case.

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