JP4776095B2 - Iron core manufacturing method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an iron core manufacturing method and an apparatus for manufacturing a ring iron core used in a rotating machine such as an electric motor or a generator.
[0002]
[Prior art]
BACKGROUND ART A rotating machine such as an electric motor or a generator includes a stator including a frame and an iron core, a rotor, at least one coil winding, and a coupling unit that connects to an external device.
[0003]
Of these, the stator core is one of the components of the rotating machine. For example, when it becomes a turbine generator, its assembly is performed by stacking tens of thousands to hundreds of thousands of relatively thin steel plates. It is manufactured by compressing and clamping and forming it into the shape of a stator core (for example, a large cylinder).
[0004]
The stator core is clamped while maintaining its geometric shape so as to withstand electromagnetic force applied to the stator core during operation of the generator.
[0005]
Moreover, if the clamp which maintains the geometric shape of a laminated body is not performed appropriately, a steel plate may vibrate by the magnetic impulse and the elliptical expansion of the iron core during the operation of the generator.
[0006]
The geometric shape of the stator iron core is simply obtained by laminating punched steel plates (cutting plates) as they are, and the variation in the thickness dimension accuracy of the rolled material is reflected as it is, so that a predetermined dimensional accuracy cannot be obtained. . Therefore, it is necessary to correct the dimensions of the stator core. They insert a spacer-attached punch plate, to which a correction spacer is bonded, at a predetermined interval when stacking the punch plates. In addition, because it has a structure in which a gap is provided for cooling the iron core of the stator, a gap plate with gap pieces welded to form a gap is inserted at predetermined intervals when stacking the punching plates. is doing.
[0007]
[Problems to be solved by the invention]
However, in the assembly of the stator as described above, the insertion of the spacer-attached punch plate and the spacer plate welded with the spacer pieces is performed manually. For this reason, it is necessary to stop the apparatus when performing the insertion, and it is extremely difficult to increase productivity. In addition, since the positioning guide is fixed, the varnish processed on the end face of the outer peripheral portion of the punching plate is not peeled off, and the fixing position of the positioning guide is about 0.1 mm to 0.3 mm with respect to the punching plate. It was extremely difficult to raise productivity because the gap between the sheets of the punched plates laminated by this gap varied and the position accuracy had to be corrected by stopping the device. .
[0008]
The present invention has been made based on these circumstances, and an object of the present invention is to provide an iron core manufacturing method and an apparatus for assembling an iron core accurately and efficiently.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, an iron core is manufactured by forming a ring by sequentially placing adjacent laminated plates having a substantially fan shape on a laminated table by a transfer means to form a ring, and forming a plurality of layers of the ring. In this manufacturing method, the transfer means sequentially takes out the laminated plate placed on the carriage from the carriage and transfers it onto the laminated table or the ring placed on the laminated table. A transfer step, a fixed guide provided on the inner diameter side of the stacking table, a first movable guide provided on the outer diameter side of the stacking table and restricting a circumferential position of the stacked plate, A positioning step for positioning the laminated plate transferred onto the lamination table with a second movable guide that pushes the laminated plate in the radial direction, and the transfer step and the positioning step are repeated in order to thereby remove the ring. form And having a ring forming step for.
[0010]
The invention according to claim 2 has a ring configured by a laminated plate provided with a spacing piece for spacing a predetermined distance between adjacent rings, or a spacing adjusting member for adjusting a spacing in the stacking direction of the rings. It has the process of providing the ring comprised with the laminated board.
[0011]
The invention according to claim 3 is characterized in that, in the transfer step, there is a positioning step of positioning the laminated plate taken out by the transfer means.
[0012]
The invention according to claim 4 is characterized in that in the transfer step, the laminate is transferred onto a fixed laminate table.
[0013]
The invention according to claim 5 is characterized in that, in the transfer step, the laminate is transferred onto the indexable movable laminate table.
[0014]
According to a sixth aspect of the present invention, a plurality of stacking units having transfer means are arranged around the stacking table, and a substantially fan-shaped stacking plate stacked on a movable carriage by the transfer means is sequentially taken out. In an iron core manufacturing apparatus for manufacturing a core by forming a ring by mounting adjacently on a stacking table and forming a plurality of layers of the ring, the stacking table has an annular shape, and the stacking table is formed on the inner diameter side of the stacking table. A fixed guide for guiding at least two points separated from each other on the inner diameter side of the plate; on the outer diameter side thereof, a first movable guide for regulating a circumferential position of the laminated plate; and the laminated plate in the radial direction The second movable guide that pushes in is provided at two spaced points on the outer diameter side of the laminated plate, and has a control mechanism that prevents the adjacent transfer means from interfering with each other.
[0015]
The invention according to claim 7 is characterized in that a plurality of carriages are arranged in each of the loading units, and a plurality of types of laminated plates are loaded.
[0017]
The invention according to claim 8 is characterized in that the laminated unit is provided with an orientation table for aligning the laminated plate taken out by the transfer means between the laminated table and the carriage.
[0018]
The invention according to claim 9 is characterized in that a safety fence is installed outside the laminated unit.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, as an embodiment of the present invention, a case where the present invention is applied to a stator core of a turbine generator will be sequentially described with reference to the drawings.
[0020]
FIG. 1 is a partial perspective view of a stator core. The stator core has a configuration in which a plurality of (for example, 10) blocks 3 are stacked in a casing (not shown), and one end core (not shown) is provided at each end thereof. The block 3 includes, for example, a ring 2 configured by annularly arranging, for example, 15 sheets of punched plates (laminated plates) obtained by punching a silicon steel plate having a thickness of, for example, 0.35 mm into a predetermined shape in a direction perpendicular to the rolling direction. For example, it has a shape of approximately 450 mm in which 1200 sheets are stacked. As shown in the plan view of FIG. 2, the punching plate 1 has a substantially fan shape, and has a comb-like portion 7 having four comb teeth that engage with a coil (not shown) on the inner diameter side. The tip of the comb-like portion 7 is used as a position reference during lamination. In addition, four recesses 8 are formed on the outer diameter side to which pushers (described later) engage during lamination.
[0021]
In the ring 2 constituting each block 3, a ring 2a constituted by a composite blanking plate (laminate plate) 1a for adjusting the lamination accuracy is laminated. Although the punching plate 1 is punched from the rolled steel sheet, there is a variation in the thickness dimension between the width direction center part and the width direction end part of the rolled steel sheet. A predetermined dimensional accuracy cannot be obtained. Therefore, in order to eliminate the gap, a ring 2a constituted by a composite blanking plate 1a as shown in FIG. The composite punching plate 1a is configured by bonding a spacer 5 and a blade edge stuffing 6 as an interval adjusting member for adjusting the stacking accuracy on the outer peripheral side and / or the inner peripheral side of the punching plate 1.
[0022]
Further, like the ring 2a configured by the composite punched plate 1a, a plurality of intervals for forming gaps in the block 3 for cooling the stator core in the rings 2 configuring each block 3 are provided. A ring 2b constituted by a spacing plate (laminated plate) 1b (plate thickness is 0.65 mm, for example) to which the pieces 6 are welded is laminated. As shown in FIG. 3 (b), the spacing plate 1b is welded with a plurality of spacing pieces 4 (seven in the case of the figure) radially along the radial direction. Is formed.
[0023]
The end iron core (not shown) is formed by laminating one block with a thickness of, for example, about 160 mm. When the end iron core is laminated on the end of the block 3, the ring 2 extends from the block 3 side toward the end of the stator core. The inner diameter is gradually increased. Specifically, the tips of the comb-like portions 7 are gradually shaved so that the radial length of the punch plate 1 gradually decreases from the inner diameter side.
[0024]
Next, an iron core manufacturing apparatus according to an embodiment of the present invention will be described. FIG. 4 is a perspective view of the iron core manufacturing apparatus according to the present embodiment. Hereinafter, in the description of the manufacturing apparatus, the reference numerals are used for the stator core and its component parts with reference to the drawings of FIGS. 1 to 3.
[0025]
The entire manufacturing apparatus is installed in the safety fence 11. A laminated table 12 having an annular flat surface is arranged at the center, and four laminated units 13 each having a transfer robot 16 are arranged along the outer periphery thereof.
[0026]
The laminated table 12 is a fixed table, and a fixed guide 14 is provided on the inner diameter side to guide the punch plate 1 placed on the laminated table 12 and serve as a position reference for assembly. Further, a pusher 15 that is a movable guide for bringing the stacked punching plates 1 into close contact with the fixed guide 14 from the outer diameter side is provided on the outer diameter side of the laminated table 12. These fixed guide 14 and pusher 15 form a positioning guide.
[0027]
As shown in FIG. 5, the fixed guide 14 is provided so as to be simultaneously engaged with two portions of the comb-like portion 7 of the punching plate 1, and the pusher 15 is formed on the outer periphery of the punching plate 1. Of the four recesses 8, the two recesses 8 sandwiching one recess 8 are disposed at positions where the two recesses 8 are pressed. One of the pushers 15 has a function of entering the recess 8 and restricting the position in the circumferential direction, and the other of the pushers 15 has only a function of pushing the punching plate 1 in the radial direction.
[0028]
Next, the laminated unit 13 will be described with reference to FIG. The four stacking units 13 have the same configuration, and are provided with transfer robots 16 that adsorb the punched plates 1 and transfer them to the stacking table 12. For example, two carriages 17 a to 17 d are arranged on both sides of the transfer robot 16. Has been. These carriages 17 a to 17 d move along a track 21 laid on the floor, and stop at predetermined positions on both sides of the transfer robot 16. The track 21 extends outside the safety fence 11 although not shown in FIG.
[0029]
Supply bases 18a to 18d are provided on the upper portions of the carriages 17a to 17d, and a punching plate 1, a composite punching plate piece 1a for adjusting the stacking accuracy, and a spacing piece 4 are welded onto the supply bases 18a to 18d. The spacing plates 1b are respectively placed. Of the carriages 17a to 17d provided on both sides of the transfer robot 16, the punching plates 1 are placed on the carriages 17a and 17b on the laminated table 12 side, respectively, and one of the outside carriages 17c and 17d is placed. The carriage 17c is loaded with a spacing plate 1b, and the other carriage 17d is loaded with a composite punching plate 1a.
[0030]
Each of these carriages 17a to 17d is formed of four wheels, and these wheels 19 are configured to contact the track 21 at the slope as shown in FIG. Accordingly, the center positions of the carriages 17 a to 17 d coincide with the center of the track 21, and the carriages 17 a to 17 d are always at the same position on the track 21. Accordingly, the punching plate 1, the composite punching plate 1a, and the spacing plate 1b placed on the carriages 17a to 17d stopped at the predetermined positions are in the same position. Therefore, the operation of the transfer robot 16 can always suck the same portion of the punching plate 1, the composite punching plate 1a, and the spacing plate 1b.
[0031]
In addition, as shown in FIG. 6, an orientation table 22 is provided between each of the carriages 17 a and 17 b on the laminated table 12 side and the laminated table 12. This orientation table 22 is used by the transfer robot 16 to transfer and position the punching plate 1, composite punching plate 1a, and spacing plate 1b mounted on the carriages 17a to 17d. A C-shaped guide 23 in which the outer diameters of the composite punching plate 1a and the spacing plate 1b are inscribed is provided. The punching plate 1 or the like adsorbed by the transfer robot 16 is urged by the C-shaped guide 23 and is aligned in a predetermined position / direction with respect to the transfer robot 16. Therefore, the punching plate 1, the composite punching plate 1a, and the spacing plate 1b placed on the carriages 17a to 17d may not be placed with precise positional accuracy. In FIG. 5, the orientation table 22 is omitted in order to avoid complexity of the drawing.
[0032]
Next, the operation of the iron core manufacturing apparatus having these configurations will be described. Four carts 17a to 17d are arranged on both sides of the four transfer robots 16 in advance, and the blanking plate 1, the composite blanking plate 1a, and the spacing plate 1b are respectively mounted on the carts 17a to 17d. Is placed. The transfer robot 16 adsorbs the extraction plate 1 according to a predetermined program and sets it on the C-shaped guide 23 of the orientation table 22 and urges it toward the C-shaped guide 23 side by a pusher (not shown). To position the blanking plate 1. The aligned punching plate 1 is further placed on a predetermined position of the stacking table 12 while being attracted by the transfer robot 16. The predetermined position is ideally an intermediate position where the punch plate 1 does not touch the fixed guide 14 on the inner diameter side and the retracted outer diameter side pusher 15.
[0033]
As shown in FIG. 5, the punching plate 1 placed on the laminated table 12 is pushed inward from the outer diameter side of the punching plate 1 by pushers 15 provided at two locations. By this operation, the two portions of the comb-like portion 7 of each punching plate 1 are guided and fixedly positioned by the fixed guide 14. Since the pusher 15 is retracted in the outer peripheral direction of the laminated table 12 when the operation is finished, the outer peripheral side of the punched plate 1 is moved when the punched plate 1 is transferred to the laminated table 12 by the transfer robot 16 next time. It becomes non-contact with the edge part. Thereby, it is preventing that the varnish currently processed by the edge part of the outer peripheral side of the punching board 1 is peeled.
[0034]
Thereafter, the same operation is repeated, the arm of the transfer robot 16 moves in the horizontal direction by a predetermined amount, and the punching plates 1 are sequentially closely arranged next to the punching plate 1 placed on the stacking table 12. The operation of the transfer robot 16 is carried out sequentially by the four transfer robots 16, and the 15 punching plates 1 are placed adjacent to each other on the stacking table 12, and one ring ring is formed on the same plane. 2 is formed.
[0035]
Similarly, the holding interest of the transfer robot 16 shifts on the ring 2 on which the first layer is formed, and the same operation is repeated to form the ring 2 of the second layer. The stacking position of the ring 2 for each layer is such that the four comb-like portions 7 formed on the outer periphery of the punching plate 1 are shifted by one pitch and stacked. Accordingly, the end face of the blank plate 1 is shifted by one pitch by the ring 2 for each layer.
[0036]
Thereafter, according to the program, the composite blanking plate 1a and the spacing plate 1b are inserted and laminated at a predetermined interval to complete the block 3 by laminating the ring 2 of the predetermined layer. In addition, the air duct (not shown) conveyed by the robot 16 is inserted into the concave portion 8 outside the spacing plate 1b, and the space formed by the spacing pieces 4 is closed.
[0037]
When the ring 2 of the predetermined layer is formed, the composite blanking plate 1a and the spacing plate 1b are inserted according to a predetermined program, and when the rings 2a and 2b are formed by the same operation, the ring 2 of the blanking plate 1 is again formed. Are formed and laminated.
[0038]
Further, the four transfer robots 16 have three transfer robots 16 for the rings 2, 2a, and 2b formed by the punch plate 1, the composite punch plate 1a, and the spacing plate 1b. The four punching plates 1, 1a, 1b are in charge, and the remaining one transfer robot 16 is in charge of the three punching plates 1, 1, a, 1b. Further, the transfer robots 16 responsible for the three punched plates 1, 1a, 1b are not fixed, and the four transfer robots 16 are sequentially changed to the adjacent transfer robot 16 for each ring of one layer. It is like that.
[0039]
Therefore, since the four transfer robots 16 operate according to a common operation pattern, they can be performed collectively with the same control. Thereby, it is possible to prevent the movement robots 16 from interfering with each other. In addition, when the operation of the transfer robot 16 is delayed and remains in the interference area with the adjacent transfer robot 16, it is set so that only one transfer robot 16 can always enter the interference area. Therefore, the transfer robots 16 do not collide with each other within the interference range.
[0040]
The blocks 3 formed by these are fastened and fixed by a conveying jig (not shown), and are carried out of the stacking table 12 by a crane (not shown), and are separately stacked in units of the blocks 3 in the stator frame. Forms the stator core.
[0041]
In addition, in the case of laminated assembly of end iron cores, as shown in FIG. 8, the tip of the comb-like portion 7a of the punching plate 1c is notched, so the tip of the comb-like portion 7a is used as a position reference. I can't. Therefore, as shown in FIG. 8, the two grooves of the comb-like portion 7 a of the punching plate 1 c placed at a predetermined position of the laminated table 12 are engaged with a gap in the groove width direction 2. An assembly reference bar 24 is erected. When the transfer robot 16 places the extraction plate 1c in a predetermined position without touching the assembly reference rod 24, the pushers 15 provided at the two locations push the extraction plate 1c in the inner diameter direction from the outer diameter side. The rod 24 is positioned in contact with the inclined portion of the comb-like portion 7a. During these operations, since the inner part of the groove of the comb-like portion 7 of the punching plate 1c is not in contact with the assembly reference rod 24, the varnish processed in the inner part of the groove of the punching plate 1c is peeled off. It will never be done.
[0042]
Further, the carriages 17a and 17b from which the transfer robot 16 takes out the punching plate 1 take out the stator piece 1 from the carts 17a and 17b on one side, and the composite punching plate 1a and the spacing plate 1b are each a carriage on which they are transferred. Remove from 17c, 17d. In addition, the composite punching plate 1a and the spacing plate 1b are loaded in advance with an amount necessary for assembling one stator core in each of the carriages 17c and 17d. As a result, regarding the supply of the punching plate 1, when the punching plate 1 loaded on the one side cart 17a becomes empty, the transfer robot 16 sucks and takes out the punching plate 1 of the other side cart 17b. It becomes like this.
[0043]
At that time, the empty carriage 17 a moves from a predetermined location along the track 21 and retreats to the outside of the safety fence 11. When the punching plate 1 is fully loaded on the retracted carriage 17a, the carriage 17a moves from the retracted position to a predetermined position in the safety fence 11 and stops. During this operation, the transfer robot 16 takes out the extraction plate 1 from the other carriage 17b, so that the stacking operation of the transfer robot 16 can operate continuously without interruption.
[0044]
In the above-described embodiment, the placement of the punching plate 1 on the fixed stacking table 12 is the same when the four transfer robots 16 arrange the punching plates 1 of the number of shares received in the horizontal direction, respectively. Although an annular ring 2 having a single layer is formed on a plane, an index turntable can be used as the stacking table 12. In this case, the structure is the same as that of the above-described embodiment except that an index table is used as the stacking table. Therefore, this will be described with reference to FIGS. 4 and 6.
[0045]
In this case, the four transfer robots 16 place the punching plate 1 on the same position with respect to the stacking table 12a which is an index turntable, and the punching plate 1 mounted on the stacking table 12a is: The pusher 15 provided at two places is pushed in from the outer diameter side of the punching plate 1 in the inner diameter direction. By this operation, two portions of the coil engaging portion of the punching plate 1 are guided by the fixed guide 14 and positioned closely. Thereafter, similarly, it is possible to form the annular ring 2 of one layer on the same plane by arranging the punching plates 1 by the index movement of the stacking table 12.
[0046]
In addition, the same operation | movement is performed according to the above-mentioned embodiment also about the composite punching board 1a and the space | interval board 1b. With the above-described configuration, the transfer robot 16 can be provided with only one predetermined position on which the extraction plate 1 is placed, and the teaching work of the transfer robot 16 can be greatly reduced, and the work efficiency can be improved. it can.
[0047]
In each of the above-described embodiments, one annular ring is formed by 15 punched plates. However, the number of the punched plates 1 is not limited to 15; 12, 18, 20 21 sheets etc. can be arbitrarily selected. On the other hand, the number of laminated units installed around the laminated table is not limited to four and can be appropriately selected and arranged.
[0048]
Moreover, according to the above-mentioned embodiment, lamination | stacking, such as a punching board, can be performed accurately and continuously continuously efficiently, and a stator core can be formed in a short time.
[0049]
Moreover, since a varnish treatment such as a punching plate is not peeled off during the laminating operation, a good stator core can be manufactured.
[0050]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the iron core which comprises a stator etc. can be laminated | stacked and assembled accurately and efficiently.
[Brief description of the drawings]
FIG. 1 is a partial perspective view of a stator core.
FIG. 2 is a plan view of a punched plate.
3A is a configuration diagram of a composite blanking plate, and FIG. 3B is a configuration diagram of a spacing plate.
FIG. 4 is a perspective view of an iron core manufacturing apparatus according to an embodiment of the present invention.
FIG. 5 is an explanatory diagram of positioning of a punch plate.
FIG. 6 is a configuration diagram of a laminated unit according to an embodiment of the present invention.
FIG. 7 is a diagram showing the relationship between the wheels of the carriage and the track.
FIG. 8 is an explanatory diagram of positioning of the end iron core.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 1c ... Cut-out plate, 1a ... Composite cut-out plate, 1b ... Space | interval plate, 2, 2a, 2b ... Ring, 3 ... Block, 4 ... Space | interval piece, 5 ... Spacer, 6 ... Blade-stuffing thing, 7 ... Comb-tooth-shaped part , 8 ... recess, 12 ... laminated table, 13 ... laminated unit, 14 ... fixed guide, 15 ... pusher, 16 ... transfer robot, 17a to 17d ... carriage, 22 ... orientation table

Claims (9)

In the manufacturing method of an iron core, a laminated plate having a substantially fan shape is sequentially placed on a laminated table by placing it adjacent to each other to form a ring, and a plurality of layers of this ring are formed to produce an iron core.
The transferring means sequentially takes out the laminated plate placed on the carriage from the carriage and transfers it onto the laminated table or the ring placed on the laminated table; ,
A fixed guide provided on the inner diameter side of the laminate table, a first movable guide provided on the outer diameter side of the laminate table and restricting the circumferential position of the laminate plate, and the laminate plate in the radial direction A positioning step of positioning the laminated board transferred on the lamination table with a second movable guide to be pushed ;
A method of manufacturing an iron core, comprising: a ring formation step of forming the ring by sequentially repeating the transfer step and the positioning step. A ring constituted by a laminated plate provided with a spacing piece for providing a predetermined interval between adjacent rings, or a ring constituted by a laminated plate having a spacing adjusting member for adjusting the spacing in the stacking direction of the rings. The method of manufacturing an iron core according to claim 1, further comprising a step of providing.   2. The method of manufacturing an iron core according to claim 1, further comprising a positioning step of positioning the laminated plate taken out by the transfer means in the transfer step.   The method of manufacturing an iron core according to claim 1 or 2, wherein the transfer step transfers the laminated plate onto a fixed laminated table.   2. The method of manufacturing an iron core according to claim 1, wherein in the transfer step, the laminated plate is transferred onto a laminated table in which the index is movable. A plurality of stacking units having transfer means are arranged around the stacking table, and a substantially fan-shaped stacking plate stacked on a movable carriage by the transfer means is sequentially taken out and mounted adjacently on the stacking table. In an iron core manufacturing apparatus that forms a ring by forming a plurality of layers of this ring and manufactures an iron core,
The stacking table has an annular shape, and has a fixed guide for guiding at least two points on the inner diameter side of the laminated plate on its inner diameter side, and a circumferential position of the laminated plate on its outer diameter side. And a second movable guide for pressing the laminated plate in the radial direction are provided at two spaced points on the outer diameter side of the laminated plate,
An iron core manufacturing apparatus having a control mechanism for preventing adjacent transfer means from interfering with each other.   The iron core manufacturing apparatus according to claim 6, wherein a plurality of the carts are arranged in each of the loading units, and a plurality of types of laminated plates are loaded thereon.   7. The iron core manufacturing apparatus according to claim 6, wherein the lamination unit is provided with an orientation table for aligning the laminated plate taken out by the transfer means between the lamination table and the carriage. .   The iron core manufacturing apparatus according to claim 6, wherein a safety fence is installed outside the laminated unit.

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