Insulating coating peeling device of generator coil, and insulating coating peeling method

Abstract

To provide an insulating coating peeling device of a generator coil, capable of easily and completely peeling an insulating coating of the generator coil, and to provide an insulating coating peeling method.SOLUTION: An insulating coating peeling device 10 of a generator coil according to the present invention comprises: a feeding part 20 for linearly moving a cross-sectional rectangular-shaped and rod-like generator coil 1 by driving means along a longitudinal direction of the generator coil 1 by horizontally arranging the generator coil; and a band saw 30 for cutting driving and driven wheels in a horizontal direction from an end face of the generator coil 1 linearly moving by the feeding part 20 by arranging a saw blade 32 in such a manner that a surface cut by the circularly moving saw blade 32 becomes horizontal, that is arranged straddling in a direction orthogonal to a longitudinal direction of the feeding part 20.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an apparatus and method for stripping an insulating coating from a generator coil, which strips all of the insulating coating from the conductive members of a used generator coil in order to reuse the conductive members. [Background technology]

[0002] A generator coil is a conductive part used inside a generator to generate electricity using electromagnetic induction. A generator coil contains a rod-shaped conductive material with a rectangular cross section (for example, approximately 50 mm (short side) x 10 mm (long side) x 1500 mm (total length)) inside, and the outer surface is covered with an insulating coating. When a generator coil is used, the insulating coating is stripped off in order to reuse the internal conductive material.

[0003] Conventional techniques for stripping insulating coatings include the devices disclosed in Patent Documents 1 and 2. The device disclosed in Patent Document 1 moves a first stripping blade downward in a direction perpendicular to the axial direction of the conductive member to strip the insulating coating from a pair of opposing side surfaces, and then lowers a second stripping blade to strip the insulating coating from the remaining pair of side surfaces of the conductive member. The stripping device disclosed in Patent Document 2 includes a support for supporting the conductive member, and a stripping blade that is mounted on the support and descends from above the conductive member toward the support, and as the stripping blade descends, it simultaneously forms a cut line and strips the coating from the area defined by the cut line.

[0004] However, both Patent Documents 1 and 2 focus on stripping the insulating coating from both ends of the generator coil or a specified width, and do not anticipate stripping the entire insulating coating. If an attempt were made to strip the entire insulating coating, the number of stripping steps would increase, lengthening the work. Furthermore, the insulating coating may contain asbestos, and stripping used generator coils at nuclear power plants poses the risk of radiation exposure, making it necessary to ensure the safety of workers. Therefore, there is a demand for a stripping device and stripping method that can completely strip the insulating coating while reducing the burden on workers. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6423398 [Patent Document 2] Japanese Patent Application Laid-Open No. 2017-131023 Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above-mentioned problems of the prior art, an object of the present invention is to provide an apparatus and method for stripping an insulating coating from a generator coil, which can easily and completely strip the insulating coating from the generator coil. [Means for solving the problem]

[0007] As a first means for solving the above problems, the present invention provides a feeding unit that horizontally arranges a rod-shaped generator coil with a rectangular cross section and linearly moves the generator coil along the longitudinal direction by a driving means; The object of the present invention is to provide a generator coil insulation coating stripping device comprising a band saw that is arranged across a direction perpendicular to the longitudinal direction of the feed section, and that cuts horizontally from the end face of the generator coil that moves linearly on the feed section, with the saw blade positioned so that the cutting surface by the saw blade that moves around the drive and driven wheels is horizontal. The first method described above makes it possible to easily and completely strip the insulating coating from long generator coils with a rectangular cross section. Because the stripping is performed automatically during the work, the safety of the working environment for the worker can be ensured and the workload can be significantly reduced.

[0008] As a second means for solving the above-mentioned problems, the present invention provides a generator coil insulation coating stripping device, which is the first means, characterized in that it is provided with anti-vibration guides having cam followers that contact and sandwich the generator coil from both sides, at the front and rear of the band saw. According to the second means, the upper ends of the generator coils at the front and rear of the band saw can be supported so as to be sandwiched between them, which significantly reduces the risk of the saw blade coming into contact with and cutting a convex portion of the conductive material during peeling cutting, or of the saw blade starting to wear.

[0009] As a third means for solving the above-mentioned problems, the present invention provides an insulating coating stripping device for generator coils, which is the first or second means, and is characterized by including a lifting unit that adjusts the height position of the band saw. According to the third means, after cutting one short side of the generator coil, the generator coil is turned upside down and the height of the saw blade can be easily adjusted (aligned) before cutting the other short side.

[0010] As a fourth means for solving the above problems, the present invention provides a method for producing a generator coil having a rectangular cross section, the method comprising the steps of: horizontally arranging a rod-shaped generator coil having a rectangular cross section in a feed section; and linearly moving the generator coil along its longitudinal direction by a driving means; The object of the present invention is to provide a method for stripping an insulating coating from a generator coil, comprising a step of cutting horizontally from the end face of the generator coil that is moving linearly with a band saw, by positioning the saw blade across the generator coil in a direction perpendicular to the longitudinal direction and moving around a drive wheel and a driven wheel so that the cutting surface by the saw blade is horizontal. According to the fourth method, the insulating coating of a long generator coil with a rectangular cross section can be easily and completely stripped. Since the stripping is performed automatically during the work, the safety of the working environment for the worker can be ensured and the workload can be significantly reduced. [Effects of the Invention]

[0011] According to the present invention, the insulating coating of the generator coil can be easily and completely stripped, a safe working environment for the worker can be ensured, and the workload can be significantly reduced. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a side view of an insulating coating stripping device for a generator coil according to the present invention. FIG. [Figure 2]1 is a plan view of an insulating coating stripping device for a generator coil according to the present invention. FIG. [Figure 3] FIG. 2(A) is a plan view of the coil presser, and FIG. 2(B) is a view taken along the arrow AA in FIG. [Figure 4] FIG. 2 is a view taken along the arrow BB in FIG. [Figure 5] FIG. 2 is a view taken along the arrow CC in FIG. [Figure 6] FIG. 2 is a view taken along the arrow DD in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an apparatus and method for stripping an insulating coating from a generator coil according to the present invention will be described in detail below with reference to the drawings.

[0014] [Generator coil insulation coating stripping device 10] Fig. 1 is a side view of the generator coil insulation coating stripping device of the present invention. Fig. 2 is a plan view of the generator coil insulation coating stripping device of the present invention (only the saw blade 32 of the band saw 30 is shown). Fig. 3 (1) is a plan view of the coil presser, and (2) is a view taken along the arrow AA in Fig. 1. Fig. 4 is a view taken along the arrow BB in Fig. 1. Fig. 5 is a view taken along the arrow CC in Fig. 1. Fig. 6 is a view taken along the arrow DD in Fig. 1.

[0015] As shown in the figure, the generator coil insulating coating peeling device 10 of the present invention is equipped with a feed section 20 that horizontally positions a rod-shaped generator coil 1 with a rectangular cross section and moves it linearly along the longitudinal direction of the generator coil 1 using a drive means, and a band saw 30 that is positioned across the direction perpendicular to the longitudinal direction of the feed section 20 and cuts horizontally from the end face of the generator coil 1 that moves linearly by the feed section 20, with the saw blade 32 positioned so that the cutting surface made by the saw blade 32 that moves around drive and driven wheels 34, 36 is horizontal.

[0016] As described above, the generator coil 1 to be cut in the present invention has a rod-shaped conductive member 2 with a rectangular cross section inside (for example, approximately 50 mm (short side) × 10 mm (long side) × 1500 mm (total length)), and is formed by covering all four outer surfaces with an insulating coating 3. The conductive member 2 is exposed at both ends of the generator coil 1 (see Figure 3 (2)). When the insulating coating 3 on a pair of short sides of the rectangular cross section of the generator coil 1 is peeled off, the insulating coating 3 on the long sides can also be peeled off. For this reason, in this embodiment, the insulating coating on the pair of short sides of the generator coil 1 is peeled off one side at a time. Furthermore, the following description will be given assuming that multiple (two in this embodiment) generator coils 1 are cut simultaneously, but the number of generator coils 1 to be cut is not limited to this and may be one.

[0017] (Feeding section 20) The feed section 20 includes a channel steel base 22, on which a linear guide 24 and free rollers 26 are horizontally arranged in a straight line (see Figures 1 and 2). The linear guide 24 has a rail 24a, a carriage 24b, and a drive mechanism (not shown). The rail 24a is positioned in the center of the base 22 along its longitudinal direction, and the drive mechanism allows the carriage 24b to move forward and backward along the rail 24a at a predetermined speed. The free rollers 26 are a group of rollers arranged in a straight line that rotate freely without a drive source. The free rollers 26 are attached to an adjustment plate 27. A liner is placed between the adjustment plate 27 and the base 22 on its underside, allowing for easy height adjustment even when the height between the pair of short sides of the generator coil 1 is different. The linear guide 24 and free rollers 26 are set longer than the overall length of the generator coil 1.

[0018] A coil holder 28 is installed on carriage 24b (see Figure 3). Coil holder 28 is a platform on which one end of the generator coil 1 is placed, and in this embodiment, two generator coils 1 are arranged horizontally with their short sides facing up and down in cross-sectional view. A gap adjustment plate 28a is placed between the two generator coils 1 to fix them on coil holder 28 without any rattle.

[0019] An intermediate carriage 29 is arranged on the side of the linear guide 24 (see Figure 4). The intermediate carriage 29 is a carriage on which the vicinity of the center of the generator coil 1 is placed on the upper surface, and casters 29a are arranged on the lower part so that it can move forward and backward linearly along the rails 24a of the linear guide 24.

[0020] (Bandsaw 30) A band saw 30 is attached to the base 22 at the end of the free roller 26 on the linear guide 24 side. The band saw 30 is a cutting device that cuts the generator coil 1, which is positioned so that its longitudinal direction is horizontal, along its longitudinal direction. The band saw 30 has an endless saw blade 32 wound around a drive wheel 34 and a driven wheel 36 and attached to a frame 38. The frame 38 is mounted on an elevator 50 that moves the saw blade 32 up and down. In this embodiment, the band saw 30 is positioned so that the wheel axis is approximately horizontal. In other words, the cutting edge of the saw blade 32 is positioned so that the cutting surface of the saw blade 32 is horizontal. One side (lower) of the rotating saw blade 32 can cut between the conductive member 2 and the insulating coating 3 of the generator coil 1, while the other side (upper) of the saw blade 32 is positioned above the generator coil 1 so that it does not come into contact with the insulating coating 3 after cutting. The band saw 30 basically cuts between the conductive member 2 and the insulating coating 3. At this time, the conductive member 2 may have protrusions on its surface, but the saw blade 32 can easily cut through the conductive member 2, which is harder than the insulating coating. Furthermore, if the insulating coating 3 is to be completely peeled off without being left behind, it is possible to cut inside the surface of the conductive member 2, in other words, to cut the conductive member 2.

[0021] (Sway Rest Guide 40) Anti-vibration guides 40 are attached to the front and rear of the band saw 30 (before and after cutting the generator coil 1). The anti-vibration guides 40 are guide members that extend upward from above the base 22 on both sides of the free rollers 26 and form an arch-shaped covering over the generator coil as it moves on the free rollers 26. The top of the anti-vibration guide 40 is positioned with a gap between it and the generator coil 1, and cam followers 42 (bearings with shafts) that rotate while in contact with the upper side of the generator coil 1 are attached to the surface facing the generator coil 1 (back surface) (see Figure 5). The length of the cam followers 42 is set to a length that allows them to contact both sides of the upper end of the generator coil 1 even if the height of the generator coil 1 decreases before and after cutting one short side of the generator coil 1. Therefore, there is no need to adjust the height of the anti-vibration guide 40 after peeling the generator coil 1. The anti-vibration guide 40 configured in this manner can support the generator coil 1 being cut by the band saw 30 so as to sandwich it, thereby significantly reducing the movement that occurs when the saw blade 32 comes into contact with a convex part of the conductive material 2 during peeling and cutting, or when the saw blade 32 begins to wear.

[0022] (Lifting unit 50) An elevator unit 50 is attached between the band saw 30 and the base 22. The elevator unit 50 adjusts the height of the saw blade 32 of the band saw 30, and in this embodiment, multiple adjustment plates 52 are used (see FIG. 6). The adjustment plates 52 are made of multiple plate materials of different thicknesses and are sized to support and support the frame of the band saw 30. Alternatively, the elevator unit 50 can be raised and lowered using a gas, fluid, or electric drive means. With this configuration of the elevator unit 50, after peeling the insulating coating 3 from one short side of the generator coil 1, the saw blade 32 can be easily positioned, for example, between the insulating coating 3 and the conductive member 2 when peeling the insulating coating 3 from the other short side of the generator coil 1, which has now become lowered.

[0023] [How to remove the insulation coating from a generator coil] A method for stripping the insulating coating from a generator coil using the generator coil insulating coating stripping device 10 having the above-described configuration will now be described. When the generator coil 1 is placed horizontally on the generator coil insulation coating stripping device 10, One end of the generator coil 1 is placed on the coil presser 28, and then the middle of the generator coil 1 is placed on the intermediate cart 29. After the two generator coils 1 are placed, the other end of the generator coil 1 is inserted into the anti-sway guide 40 on the linear guide 24 side. The lifting unit 50 is used to align the cutting edge of the saw blade 32 of the band saw 30 so that it coincides with, for example, the space between the conductive member 2 and the insulating coating 3 of the generator coil 1 . Thereafter, the band saw 30 is operated, and then the generator coil 1 is automatically fed by the feeding unit 20. The horizontally arranged, rod-shaped generator coil 1 with a rectangular cross section is moved linearly along the longitudinal direction of the linear guide 24 by the driving means.

[0024] The generator coil 1 is cut horizontally from the end face as it moves linearly with a band saw 30 having a saw blade 32 positioned so that the cutting surface made by the saw blade 32 that moves around the driving and driven wheels 34, 36 is horizontal. Even if there are protrusions on the surface of the conductive member 2, the conductive member 2 can be cut with the band saw 30. Furthermore, when completely peeling off the insulating coating 3 without leaving any residue, it is possible to cut inside the surface of the conductive member 2, in other words, to cut the conductive member 2.

[0025] According to the present invention, the insulating coating of a long generator coil with a rectangular cross section can be easily and completely stripped. The automatic stripping operation ensures a safe working environment for the worker and significantly reduces the workload. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and various modifications can be made without departing from the spirit and scope of the present invention. Furthermore, the present invention is not limited to the combinations shown in the embodiments, but can be implemented in various combinations. [Explanation of symbols]

[0026] 1 generator coil 2 Conductive material 3. Insulation coating 10. Generator coil insulation coating stripping equipment 20 Feeding section 22 base 24 Linear guide 24a rail 24b Carriage 26 Free Roller 27 Adjustment plate 28 Coil holder 28a Gap adjustment plate 29 Intermediate bogie 29a Caster 30 Bandsaw 32 saw blade 34 Drive Wheel 36 Driven wheel 38 frames 40 Steady-stop guide 42 Cam follower 50 Lifting section 52 Adjustment plate

Claims

1. a feeding unit that horizontally arranges a rod-shaped generator coil having a rectangular cross section and linearly moves the generator coil along its longitudinal direction using a driving means; a band saw arranged across a direction perpendicular to the longitudinal direction of the feed section, the saw blade being positioned so that the cutting surface of the saw blade that moves around the drive and driven wheels is horizontal, and the band saw cutting the generator coil horizontally from the end face of the generator coil that moves linearly on the feed section.

2. 2. The generator coil insulation coating stripping device according to claim 1, An insulating coating stripping device for a generator coil, characterized in that anti-vibration guides having cam followers that contact and sandwich the generator coil from both sides are provided in front of and behind the band saw.

3. 3. The generator coil insulation coating stripping device according to claim 1 or 2, An insulating coating stripping device for a generator coil, comprising a lifting unit for adjusting the height position of the band saw.

4. a step of horizontally disposing a rod-shaped generator coil having a rectangular cross section in a feed section and linearly moving the generator coil along its longitudinal direction by a driving means; a band saw positioned across the generator coil in a direction perpendicular to the longitudinal direction, the saw blade being positioned so that the cutting surface of the saw blade that moves around the drive and driven wheels is horizontal, and cutting the generator coil in a horizontal direction from the end face as it moves linearly with a band saw.

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