JP2008035606A - Coating stripper for rectangular wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating stripper for a rectangular wire which can elongate the life of a wire brush. <P>SOLUTION: This coating stripper is provided with a cooler 3 which cools, by compressed air, the rectangular wire 8 in a specified range where an insulating coating layer is peeled off by wire brush devices (2A and 2B) for thickness direction. The two or more wire brushes (2A and 2B) for thickness direction are provided in series in the sending direction of the rectangular wire 8, and the respective wire brush devices (2A and 2B) for thickness direction on the upstream side and the downstream side in the sending direction are used for rough processing and finishing processing, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus for stripping a predetermined range of an insulating film layer in a length direction of a rectangular wire used for winding of a large rotating electrical machine such as a turbine generator.

  For rectangular wires used for windings of large rotating electrical machines such as turbine generators, each element of the coil is prepared in advance as a preparation for manufacturing coils for large rotating electrical machines having a predetermined coil shape and number of turns. The process which peels off partially the insulation film layer of the flat wire of the site | part used as the both ends of a wire is performed. Taking an example of an armature coil used for an armature winding of a large rotating electric machine, a coil of a type generally called a dislocation coil is often used for manufacturing this armature coil. In the dislocation coil, a half coil is first created by combining a plurality of flat wire rods that have been subjected to a predetermined forming process in the width direction and, if necessary, in the thickness direction so that the dislocation is performed. After the coils are housed in the winding grooves of the armature core, the strands of the paired half coils are connected to each other, whereby a procedure for completing the dislocation coil is executed. Thus, in order to be able to carry out the connection of the strands of the half coils between the winding grooves of the armature core, the rectangular wire used as the strand of the dislocation coil has a length at both ends thereof. The insulating film layer in a predetermined range in the vertical direction needs to be peeled off in advance. For this reason, in a rectangular wire used for windings of large rotating electrical machines, a process of stripping the insulation film layer in a predetermined range in the length direction of the rectangular wire at the end portions of each wire of the coil Is essential. Thus, it is often used to perform a process of partially peeling off the insulating film layer of the flat wire using a rotary wire brush device. (See, for example, Patent Documents 1 and 2.)

  Hereinafter, a conventional example of a flat wire stripping apparatus will be described with reference to FIGS. Here, FIG. 4 is a cross-sectional view schematically showing a flat wire to which an insulating film of a general example is applied, and FIG. 5 is a coil wire of a general example using a flat wire to which an insulating film is applied. FIG. FIG. 6 is an explanatory view for explaining a conventional flat wire film peeling apparatus, FIG. 7 is an explanatory view showing a main part of the conventional flat wire film peeling apparatus, and FIG. FIG. 7B is an enlarged view of the portion P, FIG. 7B is a cross-sectional view taken along line AA in FIG. 7A, and FIG. 7C is a cross-sectional view taken along line BB in FIG. In FIG. 4, 8 is a rectangular wire material with a general insulation film, which is known as a rectangular copper wire with an insulation film. For example, a rectangular copper wire is used for the conductor 81, and the insulation film. As the layer 82, a glass yarn 83 is double-rolled in the opposite directions in a tightly tight manner on the outer periphery of the conductor 81, and an epoxy resin varnish is used as the insulating varnish 84 and is applied and baked. In FIG. 5, 8A is a coil wire of a general example manufactured using a flat wire 8. For example, an insulating film layer 82 in the range of lengths L8 and L9 is partially formed at both ends. Connection portions 88 and 89 are formed by stripping off the conductor 81 from the surface. Generally, a coil for winding of a large-sized rotating electrical machine such as the dislocation coil is manufactured using the coil wire 8A. At this time, it is necessary to form a coil by connecting a plurality of coil strands 8 </ b> A to each other, and the connection of the coil strands 8 </ b> A is performed at connection portions 88 and 89. The length L of the coil wire 8A naturally varies depending on the capacity of the large rotating electric machine to be applied, but generally ranges from about 1 m to over 10 m.

  6 and 7, reference numeral 9 denotes feed roller devices 91 and 94, thickness direction roller leveler devices 92 and 92, width direction roller leveler devices 93 and 93, width direction wire brush device 6, and thickness. This is a conventional flat wire stripping device equipped with a directional wire brush device 5 and a cutting device 4, and continuously produces a large number of coil wires 8 A from a flat wire 8 wound around a wire drum 7. It is used for. In the flat wire stripping device 9, the flat wire 8 drawn from the wire drum 7 by the feed roller devices 91, 94 is fed by thickness direction roller leveler devices 92, 92 and width direction roller levelers 93, 93. The surfaces in the thickness direction and the width direction are held while being corrected to a flat surface, and are transported to a place where the width direction wire brush device 6 and the thickness direction wire brush device 5 are installed. Here, in the flat wire 8, the insulating film layer 82 in a range corresponding to the length L 8 + L 9 is peeled off by the width direction wire brush device 6 and the thickness direction wire brush device 5 at intervals of the length L. In the flat wire 8 in which the conductor 81 in the range corresponding to L8 + L9 is exposed at intervals of the length L, the exposed portion of the conductor 81 is cut by the cutting device 4 at positions where the length L8 and the length L9 are obtained. . By cutting the exposed portion of the conductor 81 by the cutting device 4, the coil wire 8A can be obtained. Through the above steps, the flat wire stripping device 9 continuously manufactures the coil wire 8A having the connecting portions 88 and 89 having the length L8 and the length L9 at both ends.

  The wire brush device 5 for the thickness direction 5 and the wire brush device 6 for the width direction are respectively provided with a pair of rotary wire brushes 51 and 51 for stripping the insulating film layer 82 in the predetermined range from the rectangular wire 8. A rotary wire brush 61 (one rotary wire brush 61 is not shown) is provided. The wire brush 51 and the wire brush 61 are exactly the same. For example, a wire made of hard steel wire having a diameter of about 0.3 mm is used and the wire brush 51 and the wire brush 61 are manufactured to have an outer diameter of about 200 mm. And the process which peels off the insulating-film layer 82 of the said predetermined range of the rectangular wire 8 is performed by rotating this with the rotation speed exceeding 1000 rpm. Then, these wire brushes 51 and 61 are brought into contact with the flat wire 8 at an average interval of the length L, and the insulating film layer 82 is peeled off from the portion L8 + L9 of the flat wire 8. During the stripping process, the material forming the insulating film layer 82 is scattered as dust, so that the wire brushes 51 and 61 are covered with the dust covers 59 and 69, respectively. The dust-containing air is collected in the dust collector (not shown) from the exhaust ducts 58 and 68 connected to the dust covers 59 and 69, and is discharged to the atmosphere after dust removal. Moreover, even if the wire brushes 51 and 61 contact | abut to the site | part corresponding to L8 + L9, the width | variety of the flat wire 8 to which the insulation coating layer 82 of the site | part L8 + L9 is stripped by the wire brushes 51 and 61 is the width. In order that the position of the surface in the direction and the thickness direction does not fluctuate beyond a predetermined range, the flat wire 8 is supported by a support body that movably supports both sides in the width direction and the thickness direction.

  In the case of the wire brush device 5 for thickness direction, as shown in FIG. 7, the support bodies 53 and 53 and the support bodies 54 and 54 are used in pairs as the support bodies. The support members 53 and 53 and the support members 54 and 54 are portions as close as possible to the portions to which the wire brushes 51 and 51 are directly contacted while avoiding the vicinity where the wire brushes 51 and 51 are directly contacted. Thus, both sides of the flat wire 8 in the thickness direction are supported movably. Thus, the support bodies 53 and 53 are closer to the wire drum 7 than the portion where the wire brushes 51 and 51 are directly contacted, and the support bodies 54 and 54 are directly contacted with the wire brushes 51 and 51. The flat wire 8 is supported in the thickness direction on the opposite side of the wire drum 7 from the portion to be fixed. In addition, although the support body which supports the both surfaces of the width direction of the flat wire 8 movably in the site | part which a pair of wire brush 61 contact | abuts directly is provided in the wire brush apparatus 6 for width directions, thickness direction Compared with the case of the wire brush device 5 for the machine, the only difference is whether the part supporting the flat wire 8 is in the width direction or the thickness direction, and the structure, action and effect are the same. Illustration and description are omitted.

In addition, as a conventional flat wire stripping device, there is also known a device intended for a flat wire 8 cut in advance with a length L, and the flat wire stripping device in this case has a thickness. Although the apparatus corresponding to the direction roller leveler apparatus 92 and 92, the width direction roller leveler apparatus 93 and 93, the width direction wire brush apparatus 6, and the thickness direction wire brush apparatus 5 is provided, the cutting apparatus 4 is provided. Is not provided, and in many cases, devices corresponding to the feed roller devices 91 and 94 are not provided.
JP-A-2-84006 (Page 1-2, Fig. 1) Japanese Patent Laid-Open No. 5-111731 (2nd page, FIG. 5)

  In the rectangular wire film peeling apparatus according to the prior art such as the flat wire film peeling apparatus 9 described above, a large number of coil wires 8A can be efficiently manufactured, but the wire brush of the thickness direction wire brush apparatus 5 can be used. No. 51 becomes the life when the stripping length [(L8 + L9) × the number of manufactured coil wires 8A] reaches about 600 m. On the surfaces of the connecting portions 88 and 89 of the coil wire 8A processed with the wire brush 51 that is approaching the end of its life, a film of an insulating varnish (epoxy resin varnish) 84 of an insulating coating layer 82 of the flat wire 8 and a glass yarn 83 are provided. These fragments remain firmly attached to the extent that they are not removed even when compressed air is blown. Since the insulating varnish 84 and the glass yarn 83 are insulators, when assembling a coil for winding of a large-sized rotating electrical machine using the coil wire 8A, a connection with a solvent or a cleaning agent containing a solvent is used. It is necessary to remove the insulating varnish 84 and the glass yarn 83 attached to the portions 88 and 89 in advance. The wire brush 61 of the width direction wire brush device 6 has a stripping length significantly longer than that of the wire brush 51 of the thickness direction wire brush device 5.

  As a result, the inventors have investigated that the insulation of the insulating film layer 82 of the flat wire 8 peeled off by the wire brush 51 is applied to the end portion of the hard wire made of the wire brush 51. It has been confirmed that the film of the varnish (epoxy resin varnish) 84 and the fragments of the glass yarn 83 are firmly attached to the extent that they are not removed even when compressed air is blown. The adhered matter made of the film of the insulating varnish 84 and the glass yarn 83 attached to the wire acts as if it is a lubricant, so that the wire of the wire brush 51 to which the attached matter adheres peels off the insulating film layer 82. The ability to perform machining is reduced. As the wire brush 51 continues to repeat the stripping process of the insulating film layer 82, the amount of the deposit attached to the wire increases, and the ability of the wire brush 51 to strip the insulating film layer 82 is limited. Is estimated to reach the end of its life.

  As a countermeasure to the above-mentioned problem concerning the life of the wire brush, the stripped portion of the insulation film layer of the rectangular wire material by the wire brush is compressed by the compressed air supplied from the cooling unit provided in the wire brush device for the thickness direction. A film stripping device for a rectangular wire that prevents the film of the insulating varnish (epoxy resin varnish) 84 and the fragments of the glass yarn 83 from adhering to the wire of the wire brush by cooling, thereby extending the life of the wire brush. Has been proposed by the same applicant as the present application (Japanese Patent Application No. 2005-024992).

  However, in the flat wire stripping device according to the invention of the above-mentioned patent application, the life of the wire brush is extended, but the stripping length [(L8 + L9) × the number of coil wires 8A manufactured] is 1000 to 2000 m. As a result, the film of the insulating varnish (epoxy resin varnish) 84 and the fragments of the glass yarn 83 remain attached to the surface in the thickness direction of the connecting portions 88 and 89 of the coil wire 8A. When the inventor further investigated this point, the insulating varnish (epoxy) was obtained by cooling the stripped portion of the insulating film layer 82 of the flat wire 8 by the wire brush with the compressed air supplied from the cooling unit. Resin varnish) 84 film and glass yarn 83 fragments are prevented from adhering to the wire of the wire brush, but the wire brush continues to repeat the stripping process of the insulating film layer 82, so that the wire brush wire Deterioration of the wire brush due to wear at the tip, sag, or middle breakage has occurred, and it has been confirmed that the progress of the deterioration of the wire brush is particularly rapid in the wire brush device for the thickness direction. When the stripping length is about 1000 to 2000 m, it is estimated that the degree of deterioration of the wire brush becomes large, the ability to strip the insulating film layer 82 of the wire brush reaches the limit, and the life is reached. Is done.

For this reason, it is required to further extend the life of the wire brush constituting the film stripping device for a rectangular wire, particularly the wire brush of the wire brush device for the thickness direction.
The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a flat wire stripping device that can extend the life of a wire brush.

  In order to solve the above-mentioned problems, the present invention is an apparatus for stripping an insulating film layer in a predetermined range in the length direction of a flat wire to which an insulating film is applied, the width direction and thickness of the flat wire. The roller leveler device that corrects both sides of the flat wire in the width direction and the thickness direction to a flat surface and holds the rotated wire brush against the surface of the flat wire in the width direction. A rotating wire brush device for width direction that peels off the insulating film in the predetermined range on the surface in the width direction, and the rotated wire brush is brought into contact with the surface in the thickness direction of the rectangular wire material in the thickness direction. Rotating wire brush device for thickness direction that strips the insulating film in the predetermined range on the surface, and rotating wire brush device for width direction and rotating wire for the thickness direction for stripping the insulating film layer in the predetermined range In a stripping device for a rectangular wire, comprising a support body that movably supports both sides in the width direction and the thickness direction of the rectangular wire at a location as close as possible to the portion where each wire brush of the lash device contacts. The rotating wire brush device for thickness direction includes a cooling unit that cools the rectangular wire in the predetermined range from which the insulating film layer is peeled off by the rotating wire brush device for thickness direction with compressed air, and Two or more rotating wire brush devices for the thickness direction are provided in series along the feed direction of the rectangular wire (invention of claim 1).

  In the flat wire stripping device according to the invention of claim 1, in the rotary wire brush device for the thickness direction, the stripped portion of the insulating coating layer of the flat wire by the wire brush is formed by the compressed air supplied from the cooling section. By cooling, an increase in the temperature of the wire brush wire and the rectangular wire at this portion is suppressed. As a result, these temperatures can be maintained below the melting start temperature of the semi-cured insulating varnish (epoxy resin varnish), so that the wire brush adherent to the wire (the glass yarn that is the constituent material of the insulating coating layer) And an insulating varnish film containing a piece of glass yarn generated from the insulating varnish.) Can be prevented, and a decrease in the ability to strip the insulating film layer of the wire brush can be suppressed. Thus, the life of the wire brush can be extended. In addition, as a result, the surface in the thickness direction of the connecting portion of the coil wire, which has occurred in the case of the coil wire processed with the wire brush of the rotary wire brush device for the thickness direction of the conventional example, is described above. The problem of deposits remaining can also be improved.

  In the invention of claim 1, further, two or more rotary wire brush devices for the thickness direction are provided in series along the feeding direction of the rectangular wire, so that the upstream side in the feeding direction of the rectangular wire and The downstream rotary wire brush device in the thickness direction can function as a roughing brush and a finishing brush, respectively. For this reason, the ability to strip off the insulating coating layer of the wire brush in the upstream roughing brush (upstream rotating wire brush device in the thickness direction) decreases, and the roughing brush (upstream side brush) Insulation varnish (epoxy resin varnish) film and glass thread fragments that could not be removed by stripping with a rotating wire brush device for the thickness direction will now adhere to a stripped portion of the flat wire. However, as a state after stripping with a finishing brush (rotary wire brush device for thickness direction on the downstream side) in the subsequent stage, a film or glass of insulating varnish (epoxy resin varnish) on the stripped portion of the flat wire It is sufficient if the yarn fragments are not attached.

  Therefore, according to the first aspect of the invention, the wire brush adheres to the wire by the cooling action of the compressed air supplied from the cooling section (glass generated from the glass yarn and the insulating varnish which are the constituent materials of the insulating coating layer). (Insulation varnish film containing yarn fragments) is prevented, the decrease in the ability to strip the insulation film layer of the wire brush is suppressed, and further, roughing is performed sequentially along the feed direction of the flat wire. When the wire brush continues to repeat the stripping process of the insulating film layer by performing the finishing process, the wire brush deteriorates due to, for example, wear of the wire brush wire, sag, middle breakage, etc. Even if the ability to strip off the insulating film layer is reduced to some extent, the state after finishing is not the same as the stripped portion of the flat wire. Since it can be in a good state in which the edge varnish (epoxy resin varnish) film and glass yarn fragments are not attached, the insulating varnish (epoxy resin varnish) film or glass yarn A stripping device for flat wire that can greatly increase the stripping length [(L8 + L9) × the number of coil wires 8A manufactured] that can be stripped in a good state with no fragments attached. In the thickness direction, the substantial life of the wire brush of the rotary wire brush device for the thickness direction can be greatly extended as compared with the prior art.

  The flat wire stripping device according to claim 1, wherein the rotary wire brush device for the width direction is a rectangular wire material within the predetermined range in which the insulating coating layer is stripped by the rotary wire brush device for the width direction. And a cooling section that cools the sheet wire with compressed air, and two or more width-direction rotating wire brush devices may be provided in series along the feed direction of the rectangular wire. ).

  In the case where the problem of remaining of the attached matter also occurs on the surface in the width direction of the connecting portion of the coil wire, the rotating wire brush device for width direction is also cooled as in the invention of claim 2 above. If the two or more rotary wire brush devices for the width direction are provided in series along the feed direction of the rectangular wire, the same as in the case of the rotary wire brush device for the thickness direction described above, Thus, the substantial life of the wire brush of the rotary wire brush device for the width direction in the flat wire stripping device can be greatly extended as compared with the prior art.

Further, in the flat wire stripping apparatus according to claim 1 or 2, the compressed air may be compressed air cooled to a temperature lower than room temperature (invention of claim 3).
When the temperature of the compressed air is normal temperature, the temperature of the wire brush wire and the flat wire in the stripped portion of the flat wire insulation film layer is less than the melting start temperature of the semi-cured insulating varnish (epoxy resin varnish). If it is difficult to maintain the temperature, the compressed air cooled to a temperature lower than the normal temperature is used as in the invention of claim 3 above, so that the wire of the wire brush and the rectangular wire in the stripped portion are used. The temperature of the glass brush is maintained at a temperature lower than the melting start temperature of the semi-cured insulating varnish (epoxy resin varnish). In addition, it is possible to prevent the occurrence of the adhesion of the insulating varnish film containing glass fiber fragments.

  In the present invention, the rotary wire brush device for the thickness direction includes a cooling unit that cools the rectangular wire in a predetermined range where the insulating film layer is peeled off by the rotary wire brush device for the thickness direction with compressed air, By providing two or more thickness-direction rotary wire brush devices in series along the flat wire feed direction, as described above, the thickness-direction rotary wire brush device in the flat wire stripping device The substantial life of the wire brush can be greatly extended as compared with the prior art.

  The best mode for carrying out the present invention will be described in detail with reference to FIGS. Here, FIG. 1 is a flat wire film peeling apparatus according to a reference example of the present invention, which is proposed by a patent application (Japanese Patent Application No. 2005-024992) filed by the same applicant as the present application. FIG. 2 is an explanatory view for explaining a main part of a flat wire film peeling apparatus according to a reference example of the present invention. FIG. 2 (a) is an enlarged view of an R portion in FIG. ) Is a sectional view taken along the line DD of FIG. 2A, and FIG. 5C is a view taken along the arrow S in FIG. 2A. In the following description, the same parts as the flat wire with the insulating film of the general example shown in FIGS. 4 and 5 and the coil wire of the general example, and the prior art shown in FIGS. 6 and 7 are used. The same parts as those in the flat wire stripping apparatus of the example are given the same reference numerals, and the description thereof is omitted. Further, in the drawings used for the following description, only the representative symbols are shown as much as possible with respect to the symbols given in FIGS. 1 and 2, reference numeral 1 denotes a wire brush device for thickness direction in place of the wire brush device 5 for thickness direction, in contrast to the film stripping device 9 for rectangular wires according to the conventional example shown in FIGS. 2 is a flat wire stripping device according to a reference example of the present invention.

  The wire brush device 2 in the thickness direction according to the reference example of the present invention is different from the wire brush device 5 in the thickness direction according to the conventional example in that supply pipes 31, 32, 33 and 34 for compressed air and a supply pipe attachment body. The difference is that a cooling unit 3 having 3A is additionally provided. The supply pipes 31 to 34 inject compressed air 39 having a pressure value of 0.3 Pa, for example, toward the portion where the insulating coating layer 82 of the rectangular wire 8 is stripped by the wire brushes 51 and 51 from the respective tip portions. . Then, the supply pipes 31 and 32 are attached to the supply pipe attachment body 3A and arranged as shown in FIG. 2 so as to inject the compressed air 39 from both side portions of the wire brushes 51 and 51, respectively. The supply pipe attachment body 3A is mounted on the lower surface side in the figure of the support body 54 shown as being disposed on the lower side in FIG. The supply pipes 33 and 34 are arranged on the surface of the support body 53 on the side of the anti-square wire 8 so as to face the surface of the wire brush 51 on the side where the flat wire 8 is fed. In addition, as a supply source of the compressed air 39, a compressed air supply source (not shown) prepared for use in an air machine device such as a pneumatic cylinder (not shown) mounted on the flat wire stripping device 1 is shared. ing.

  The flat wire film peeling apparatus 1 according to the reference example of the present invention shown in FIGS. 1 and 2 is characterized in that a cooling unit 3 is provided in a wire brush apparatus 2 for a thickness direction. The inventor researched the conventional flat wire stripping device 9 to measure the temperature of the flat wire 8 at the portion where the wire brushes 51, 51 of the thickness direction wire brush device 5 are stripped of the insulating coating layer 82. Is increased to about 200 ° C., and the temperature of the rectangular wire 8 in the portion subjected to the stripping process by the pair of wire brushes 61 of the wire brush device 6 for the width direction is the wire brush 51. Found it much lower than. The insulating varnish (epoxy resin varnish) 84 of the insulating film layer 82 of the flat wire 8 is baked at the time of manufacturing the flat wire 8, but the baking does not completely cure the epoxy resin varnish. The cured epoxy resin varnish exhibits insoluble and infusible properties, but does not have insoluble and infusible properties in a semi-cured state. For this reason, the insulating wire varnish (epoxy resin varnish) 84 is in a molten state when the flat wire 8 is heated to a high temperature of about 200 ° C. during the stripping process, and the molten insulating varnish 84 is made of a hard steel wire of the wire brush 51. When it is scraped off with a wire, it adheres to the tip of the wire. In this manner, the attachment of the deposit, which is a film of the insulating varnish (epoxy resin varnish) 84 including the fragments of the glass yarn 83, to the tip portion of the wire or the like is started.

  The adhering matter adhering to the tip of the wire or the like is solidified when the wire brush 51 is in a standby state for the stripping process and dissipates heat to lower the temperature. As the wire brush 51 repeats the stripping process and the standby state, the thickness of the deposit attached to the tip of the wire of the wire brush 51 gradually increases. As already described in the section “Problems to be Solved by the Invention”, the inventors presume that the wire brush 51 will reach the end of its life with a stripping length of about 600 m, and the cause. The present invention has reached the configuration of a reference example of the present invention through repeated studies to accurately remove. Then, in the wire brush 61 of the wire brush device 6 for the width direction in the film stripping device 9 for the flat wire of the conventional example, the reason why the processing length until reaching the lifetime is much longer than that of the wire brush 51 is as follows. Since the object to be stripped of the wire brush 61 is the surface in the width direction of the flat wire 8, the processing area of the object to be processed is the thickness direction of the flat wire 8 of the object to be stripped of the wire brush 51. The inventor presumes that the amount of heat generated when the wire brush 61 is peeled off is smaller than that when the wire brush 51 is used. ing. As a result, the attached matter does not adhere to the wire brush 61, and the wire brush 61 of the wire brush device 6 for the width direction has a stripping length significantly longer than that of the wire brush 51. Conceivable.

  Thus, in the wire brush device 2 in the thickness direction of the flat wire stripping device 1 according to the reference example of the present invention, the compressed wire 39 supplied from the cooling unit 3 causes the flat wire 8 by the wire brushes 51 and 51 to be used. By cooling the stripped portion of the insulating coating layer 82, the temperature rise of the wire of the wire brush 51 and the rectangular wire 8 at this portion is suppressed. Thereby, since these temperatures can be maintained below the melting start temperature of the semi-cured insulating varnish (epoxy resin varnish) 84, it is possible to prevent the deposits from adhering to the wire of the wire brush 51, The life of the wire brush 51 can be extended. As a result, the problem of remaining deposits on the connecting portions 88 and 89, which has occurred in the case of the coil wire 8A processed by the wire brush 51 of the thickness direction wire brush device 5 of the conventional example, is improved. Is done. In the case of the wire brush device 2 in the thickness direction of the reference example of the present invention, the insulating film layer 82 is stripped by the wire brush 51 as in the case of the wire brush device 5 in the thickness direction of the conventional example. The dust of the material forming the insulating film layer 82 that is sometimes generated is collected and processed from the exhaust duct 58 by a dust collector (not shown). In the case of the wire brush device 2 for the thickness direction, Since the dust is diffused by the compressed air 39, the conveyance from the exhaust duct 58 to the dust collector becomes easier than in the case of the conventional wire brush device 5 for the thickness direction.

  In the above description, the wire brush device 6 in the width direction included in the flat wire stripping device 1 has not been provided with the cooling unit 3, but is not limited thereto. For example, the wire brush device in the width direction When the insulating film layer 82 of the flat wire 8 is peeled off at 6, the temperature of the wire of the wire brush 61 and the flat wire 8 is increased, so that the coil wire 8 </ b> A processed by the wire brush device 6 for the width direction is used. In the case where the problem of remaining deposits occurs at the connecting portions 88 and 89, the wire brush device 6 for the width direction may be provided with the cooling portion 3 as well. In the above description, the supply of the compressed air 39 of the cooling unit 3 included in the flat wire film peeling apparatus 1 to the stripping portion of the insulating film layer 82 of the flat wire 8 by the wire brush is performed in the supply pipes 31 to 31. However, the present invention is not limited to this. For example, a base part or a well-known air nozzle may be installed at the tip part of the supply pipes 31 to 34. In addition, although the supply source of the compressed air 39 has been shared with the compressed air supply source used in the pneumatic machine device mounted on the flat wire stripping device 1, in this case, even if the temperature of the compressed air 39 is low It is in the category of room temperature. When the temperature of the compressed air 39 is normal temperature, the temperature of the wire brush wire and the rectangular wire 8 at the portion where the insulating film layer 82 of the flat wire 8 is peeled by the wire brush is in a semi-cured insulating varnish (epoxy resin varnish). ) When it is difficult to maintain the temperature below the melting start temperature of 84, for example, the compressed air 39 is cooled by a cooling device or the like for cooling the compressed air, and the temperature of the compressed air 39 is, for example, about room temperature of about −30 ° C. Alternatively, the temperature may be lowered.

  FIG. 3 is an explanatory diagram illustrating a flat wire film peeling apparatus according to an example of the embodiment of the present invention. In the following description, the same part as the flat wire and the coil wire of the general example provided with the insulating film of the general example shown in FIG. 4 and FIG. The same reference numerals are given to the same parts as those of the flat wire stripping apparatus of the reference example of the invention, and the description thereof is omitted. Further, in the drawings used for the following description, only the representative symbols are shown as much as possible with respect to the symbols given in FIGS. In FIG. 3, reference numeral 101 denotes two wire brushes for the thickness direction along the feed direction of the flat wire 8 with respect to the flat wire stripping apparatus 1 according to the reference example of the present invention shown in FIGS. It is a flat wire film peeling apparatus according to the present invention in which the apparatuses 2A and 2B are provided in series.

  3 is configured such that the two wire brush devices 2A and 2B for the thickness direction are provided in series along the feed direction of the flat wire 8 as described above. 1 except that the upstream and downstream thickness direction wire brush devices 2A and 2B in the feed direction are used for roughing and finishing, respectively. is there. The thickness direction wire brush devices 2A and 2B in FIG. 3 both have the same configuration as the thickness direction wire brush device 2 in FIG. 1, and cooling in the thickness direction wire brush device 2 in FIG. Cooling sections 3A and 3B and exhaust ducts 58A and 58B having the same configuration as the section 3 and the exhaust duct 58 are provided.

  The method for processing the flat wire 8 performed by the flat wire stripping device 101 of FIG. 3 is such that the flat wire 8 drawn from the wire drum 7 is stripped in the width direction by the wire brush device 6 for the width direction. The processing up to this point is the same as the processing method of the flat wire 8 performed by the flat wire stripping device 1 of FIG. 1, but the subsequent stripping processing in the thickness direction by the wire brush device for the thickness direction is performed. The method is different.

  That is, in the flat wire stripping device 101 of FIG. 3, the flat wire 8 that has been stripped in the width direction by the width-direction wire brush device 6 is first subjected to a thickness direction wire brush for roughing. Processing is performed to roughly peel off the insulating varnish (epoxy resin varnish) 84 and the glass yarn 83 constituting the insulating film layer 82 after being sent to the apparatus 2A. In the stripping process by the wire brush device 2A for the thickness direction for roughing, the film of the insulating varnish (epoxy resin varnish) 84 and the glass yarn 83 that could not be stripped at the stripping part of the flat wire 8 were removed. A certain amount of fragments may remain and adhere, and the amount of adhesion is about several times the amount of adhesion that the wire brush has reached the end of its life in the flat wire film peeling apparatus 1 of FIG. It doesn't matter.

Next, the rectangular wire 8 is peeled off from the flat wire 8 sent from the thickness direction wire brush device 2A side for roughing by the thickness direction wire brush device 2B for finishing. Processing for completely peeling off the film of the insulating varnish (epoxy resin varnish) 84 and the glass yarn 83 at the processing site is performed.
In the wire brush devices 2A and 2B for the thickness direction in the film stripping apparatus 101 for the flat wire rod shown in FIG. 3, the cooling sections 3A and 2B are similar to the wire brush devices 2 for the thickness direction in the film stripping device 1 for the flat wire rod shown in FIG. By the cooling action by the compressed air supplied from 3B, the wire brushes 51A and 51B adhere to the wire (the pieces of the glass yarn 83 generated from the glass yarn 83 and the insulating varnish 84 which are the constituent materials of the insulating coating layer 82). The adhesion of the insulating varnish 84 film) is prevented, and the lowering of the ability to strip the insulating coating layer 82 of the wire brushes 51A and 51B is suppressed.

  In the flat wire stripping device 101 of FIG. 3, as described above, the wire brush devices 2A and 2B for the thickness direction are provided in series along the feed direction of the flat wire 8, and the flat wire The wire brush devices 2A and 2B for the thickness direction on the upstream side and the downstream side in the feeding direction of the wire 8 are used for roughing and finishing, respectively. In the wire brush device 2A for the thickness direction for roughing, the wire brush 51A continuously repeats the stripping process of the insulating film layer 82, so that, for example, due to wear of the wire brush 51A, sag, middle breakage, etc. Due to the deterioration of the wire brush 51A, the ability of the insulating film layer 82 of the wire brush 51A to be stripped is reduced, and the film of the insulating varnish (epoxy resin varnish) 84 and the fragments of the glass yarn 83 that could not be stripped are removed. Even if a certain amount adheres to the stripped portion of the flat wire 8, the finishing process is further performed by the thickness direction wire brush device 2B for finishing. As a state after the stripping process of the flat wire 8, a film of an insulating varnish (epoxy resin varnish) 84 or a fragment of the glass yarn 83 may not be attached to the processed part. For this reason, the stripping length of the flat state 8 in which the film of the insulating varnish (epoxy resin varnish) 84 and the piece of the glass yarn 83 are not attached to the stripped portion [(L8 + L9) × coil wire 8A can be increased as compared with the flat wire stripping device 1 of FIG. 1, and the substantial life of the wire brush of the thickness direction wire brush device can be greatly extended. It becomes like this.

  Further, in the flat wire stripping device 101 of FIG. 3, the wire brushes 51A and 51B of the thickness direction wire brush devices 2A and 2B for roughing and finishing are used as the flat wire stripping device of FIG. A wire brush having the same configuration as that of the wire brush 51 of the wire brush device 2 for the thickness direction 1 may be used. However, the configuration of the wire brush used, that is, the wire material, the wire diameter, the wire density, the brush outer diameter, etc. It is not limited to. Further, the wire brush 51A and the wire brush 51B used in each of the thickness direction wire brush devices 2A and 2B for roughing and finishing may be different from each other. For example, for the thickness direction for roughing As the wire brush 51A of the wire brush device 2A, a wire brush having a configuration in which the wire diameter is larger and the wire density is smaller than that of the wire brush 51B of the thickness direction wire brush device 2B for finishing, that is, the strength of the film peeling processing A coarse wire brush may be used.

In addition, each thickness direction wire brush device 2A, 2B for roughing and finishing is controlled independently for each thickness direction wire brush device for the rotational speed and vertical movement of the wire brushes 51A, 51B. It is better to be able to do so.
Further, in the flat wire stripping device 101 of FIG. 3, the wire duct devices 2A and 2B for the thickness direction are provided with exhaust ducts 58A and 58B, respectively. However, the present invention is not limited to such a configuration, and a common dustproof cover may be provided in the thickness direction wire brush devices 2A and 2B, and a common exhaust duct may be connected to the dustproof cover.

  In the above description, as an example of the embodiment of the present invention, two wire brush devices for the thickness direction are provided along the feeding direction of the flat wire 8 as in the flat wire stripping device 101 of FIG. Although the configuration example provided in series has been described, the coating device for stripping a flat wire according to the present invention is not limited to the above configuration, and the wire brush device for the thickness direction is used to feed the flat wire 8. For example, each wire in three or more thickness direction wire brush devices provided in series along the feed direction of the flat wire 8 may be used. The configuration of the brush is such that the wire diameter is smaller and the wire density is larger as the wire brush on the downstream side, and the degree of film stripping is increased from the upstream side to the downstream side in the feed direction of the flat wire 8. It may be going to become successively finer me.

  In the above description, as an example of the embodiment of the present invention, the wire brush device 6 in the width direction does not include the cooling unit 3 and has a width as in the flat wire stripping device 101 in FIG. The configuration example in which only one directional wire brush device 6 is provided in the feeding direction of the flat wire 8 has been described. However, the flat wire stripping device according to the present invention is not limited to the above configuration. In the case where the problem of remaining deposits also occurs on the surfaces in the width direction of the connecting portions 88 and 89 of the coil wire 8A processed by the wire brush device 6 in the width direction, the wire for the width direction is used. The brush device 6 may also be configured to include the cooling unit 3, and further, the width direction wire brush device 6 may be provided in series along the feed direction of the flat wire 8 in the feed direction. Kicking upstream and downstream each widthwise wire brush apparatus may also be used for the respective roughing and finishing.

It is the explanatory drawing explaining the film peeling apparatus for rectangular wires by the reference example of this invention. It is the explanatory drawing explaining the principal part of the film peeling apparatus for rectangular wires by the reference example of this invention, (a) is the enlarged view of the R section of FIG. 1, (b) is DD cross section of FIG. 2 (a). FIG. 2C is a view taken along the arrow S of the main part of FIG. It is the explanatory view explaining the film peeling apparatus for rectangular wires by an example of an embodiment of this invention. It is the sectional view showing typically the flat wire to which the insulating film of the general example was given. It is the side view which shows the strand for coils of a general example. It is the explanatory drawing explaining the film peeling apparatus for rectangular wires of a prior art example. It is the explanatory drawing which shows the principal part of the film peeling apparatus for rectangular wires of a prior art example, (a) is an enlarged view of the P section of FIG. 6, (b) is AA sectional drawing of FIG. ) Is a cross-sectional view taken along line BB in FIG.

Explanation of symbols

  2, 2A, 2B ... wire brush device for thickness direction, 3 ... cooling section, 3A ... supply pipe attachment body, 31 ... supply pipe, 32 ... supply pipe, 33 ... supply pipe, 34 ... supply pipe, 39 ... compressed air , 51, 51A, 51B ... wire brush, 8 ... flat wire

Claims (3)

An apparatus for stripping off a predetermined range of insulating film layer in the length direction of a rectangular wire to which an insulating film has been applied,
A roller leveler device for holding both sides of the flat wire in the width direction and the thickness direction so as to be movable from both sides, and correcting the both sides in the width direction and the thickness direction of the flat wire to a plane, and a rotated wire brush Rotating wire brush device for width direction that abuts against the surface in the width direction of the flat wire to strip the insulation film in the predetermined range on the surface in the width direction, and the surface in the thickness direction of the flat wire Rotating wire brush device for thickness direction that peels off the insulating film in the predetermined range on the surface in the thickness direction by contacting the surface, and a rotating wire brush for width direction to strip the insulating film layer in the predetermined range Supporting body that supports both the width direction and the thickness direction of the flat wire in a position as close as possible to the position where each wire brush of the device and the rotating wire brush device for the thickness direction contacts. In rectangular wire for film peel device including a
The thickness-direction rotary wire brush device includes a cooling unit that cools the rectangular wire in the predetermined range from which the insulating film layer is peeled off by the thickness-direction rotary wire brush device with compressed air, and the thickness Two or more rotary wire brush devices for vertical direction are provided in series along the feeding direction of the flat wire, and a coating device for stripping a flat wire. 2. The flat wire stripping device according to claim 1, wherein the width-direction rotating wire brush device compresses the rectangular wire within the predetermined range from which the insulating coating layer is stripped by the width-direction rotating wire brush device. A flat wire stripping device comprising a cooling unit that is cooled by air, and two or more width-direction rotating wire brush devices are provided in series along a feeding direction of the flat wire. The flat wire film peeling apparatus according to claim 1 or 2, wherein the compressed air is compressed air cooled to a temperature lower than room temperature.

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