JPH0715924A - Core laminator - Google Patents

Abstract

PURPOSE:To offer a core laminator of simple mechanism that can automatically laminate segment cores constituting an AC machine stator core by enabling positioning of ring-shaped segment cores in circumferential and radial directions. CONSTITUTION:A squirrel-cage laminating jig A is installed on an index table integrally. An inner loader B is constituted in such a way that a core receiving plate 7 and core pushing rod 8 mounted on an elevator 6 can independently move in the radial direction of the laminating jig A. The inner loader B is installed in the laminating jig A such that it does not rotate together with the index table 4 when the table rotates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core laminating apparatus for automatically laminating a large number of ring-shaped segment cores constituting a stator core of a large AC motor or AC generator. .

[0002]

2. Description of the Related Art The stator core of an AC machine described above is constructed by laminating a number of cores made of thin ring-shaped iron plates punched by a press. Then, in the case of a large-sized AC machine, a single-layer core is composed of a large number of ring-shaped segment cores C equally divided in the circumferential direction, and the segment cores C are stacked to form a stator core S ( (See FIG. 16). Conventionally, in order to stack the segment cores C, the slot groove 1 provided inside thereof is used as a guide,
It was carried out manually by using the laminating jig A as shown in FIG. This stacking jig A has a cage shape in which the upper and lower ends of a large number of stacking columns 2 arranged at equal intervals along the circumferential direction are integrally connected by a ring plate 3. An operator enters and uses the slot groove 1 provided inside the segment core C as a reference for alignment along the circumferential direction, and the outer peripheral end face is brought into contact with the stacking column 2 of the stacking jig A to form the segment core. A number of Cs are laminated. It should be noted that the segment core C is formed in the layers that are one above the other.
By shifting the phase of the joints between the segments in the circumferential direction, the joints of the segment cores in the upper and lower layers do not overlap.

As described above, the work of manually laminating a large number of segment cores (which can reach tens of thousands in a large machine) by using a laminating jig is extremely inefficient in addition to the work efficiency. Since the work is monotonous and continuous, the stacking work for a long time is a pain for the worker. However, because of the difficulty of positioning the ring-shaped segment core along the circumferential direction, the stacking work of the segment core of the AC machine has not been automated until today.

[0004]

SUMMARY OF THE INVENTION In view of the above situation, the present invention makes it possible to position a ring-shaped segment core in both the circumferential direction and the radial direction with a simple mechanism, thereby making it possible to realize an alternating current machine. The problem is to automatically stack the segment cores that make up the stator core of.

[0005]

According to the present invention for solving the above-mentioned problems, one layer of a thin ring-shaped core is equally divided in the circumferential direction into a large number of ring-shaped segment cores, which are circumferentially divided. A device for automatically stacking the segment cores by using a basket-shaped stacking jig in which the upper and lower ends of a large number of stacking columns arranged at equal intervals along a ring plate are integrally connected to each other. The stacking jig is integrally installed on the upper surface of the indexing table, and the stacking device is provided inside the stacking jig so as not to rotate integrally with the indexing table even if the indexing table rotates. In the inner loading device, an elevating body is attached to a column so as to be able to ascend and descend, and a core receiving plate is attached to the elevating body so as to be movable back and forth along the radial direction of the stacking jig. The tip of the slot groove inside the segment core placed on A core pressing rod, which is separately inserted and presses the segment cores against the stacking columns of the stacking jig, is attached to the elevating body so as to be movable back and forth in the same direction as the core receiving plate. Is characterized by.

[0006]

When the segment core is placed on the leading end of the core receiving plate at the rising end of the elevating body, the elevating body is lowered to the stacking position and stopped, and when the core receiving plate is advanced at this position, The tip surface contacts the stacking column of the stacking jig. After that, when the core pressing rod is moved forward, the wedge-shaped pressing portion at its tip is inserted into the slot groove inside the segment core placed on the core receiving plate, and this segment core is pushed forward, The outer peripheral end face is pressed against the stacking column of the stacking jig. In this way, the outer peripheral end surface of the segment core comes into contact with the stacking post of the stacking jig, so that the wedge-shaped pressing portion at the tip of the core pressing rod is also inserted into the corresponding slot groove of the stacked core layer immediately below. When the segment cores are inserted and positioned in the circumferential direction, the outer peripheral end surfaces of the segment cores come into contact with the stacking columns of the stacking jig so that the segment cores are positioned in the radial direction. After that, when the core receiving plate is retracted, since the core pressing rod prevents the segment core from retracting, the segment core remains at that position,
It is dropped and laminated on the laminated core layer immediately below. After that, the core pressing rod is retracted, and the stacking jig is rotated by a set angle by the indexing table so that the next stacking position faces the core receiving plate.

[0007]

EXAMPLES The present invention will be described in more detail below with reference to examples. FIG. 1 is a schematic front view of a core laminating apparatus according to the present invention, FIG. 2 is a perspective view showing a laminating jig A integrally installed on an indexing table 4, and FIG. 3 is a laminating jig. FIG. 4 is a plan view showing the relationship between A and the loading device B, and FIG.
4 is a plan view of the inner loading device B, FIG. 5 is a front view thereof, FIG. 6 is a side view thereof, and FIG.
8 is a sectional view taken along line XX of FIG. 8, FIG. 8 is a sectional view taken along line YY of FIG. 4, and FIG. 9 is a partially enlarged perspective view showing the stacking action of the present invention. As shown in FIG.
Is integrally installed on the upper surface of the indexing table 4 such that its center coincides with the rotation axis of the indexing table 4. An inner stacking device B is arranged inside the laminating jig A. Since the inner stacking device B is installed on the floor surface on which the indexing table 4 is installed, the indexing table 4 rotates. However, it remains fixed and does not rotate together with it.

Next, the inner stacking device B will be described in detail. As shown in FIGS. 1, 3 and 4, in the inner stacking device B, an elevating body 6 is mounted on one side surface of a column 5 so that the elevating body 6 can be moved up and down. The pressing bar 8 and the pressing bar 8 are independently mounted so as to be movable back and forth along the radial direction of the stacking jig A. That is, a pair of guide rails 9 are provided in the vertical direction on one side surface of the column 5, and the elevating body 6 is supported by the pair of guide rails 9 so as to be vertically movable.
1 is arranged in the vertical direction, and the upper and lower ends thereof are supported,
When the ball screw 11 and the ball nut 12 attached to the lifting body 6 are screwed together and the ball screw 11 is rotated in the forward and reverse directions by a motor (not shown) whose rotation speed is controllable, the ball screw 11 moves up and down accordingly. The body 6 is configured to move up and down by an amount corresponding to the rotation speed of the ball screw 11.

In addition, referring to FIGS.
The support plate 13 constituting the above is horizontally installed, and a guide groove 13a having a predetermined width is formed on the upper surface thereof along the radial direction of the laminating jig A, and the guide groove 13a has a rectangular shape. The receiving plate 7 is movably fitted. A groove 7a for avoiding interference with the core pressing rod 8 is provided in the longitudinal direction at the center of the core receiving plate 7 in the width direction,
The groove 7a is open at the tip of the core receiving plate 7. At both ends of the support plate 13 along the moving direction P of the core receiving plate 7, shafts 14 are arranged in a direction orthogonal to the moving direction P of the core receiving plate 7, and both ends thereof are supported by bearings 15. , Each toothed pulley 1 attached to the center of each shaft 14
A toothed belt 17 is hung between 6 and the gate-shaped metal fitting 18 attached to the rear end of the core receiving plate 7 is connected to the upper running portion of the toothed belt 17. Further, a motor 19 capable of controlling the number of rotations is attached to a portion of the lower surface of the support plate 13 corresponding to one end of the rear shaft 14,
A toothed belt 23 is hung between a toothed pulley 21 attached to the drive shaft and a toothed pulley 22 attached to the shaft end of the rear shaft 14, and the rear shaft 14 is rotated by a motor 19. Then, the toothed belt 17 travels around, and the core receiving plate 7 connected to the toothed belt 17 via the metal fitting 18 moves in the direction of the arrow P. The moving direction of the core receiving plate 7 is along the radial direction of the laminating jig A.

Further, an advancing / retreating cylinder 24 for advancing / retreating the core pressing rod 8 is attached to the central portion of the lower surface of the support plate 13 in the width direction, and the core pressing rod 8 is attached to the tip of the rod 24a. ing. The core pressing rod 8 is vertically arranged in the groove portion 7 a of the core receiving plate 7, and its upper end portion projects from the upper surface of the core receiving plate 7. The pressing portion 8a at the tip of the core pressing rod 8 is formed in a wedge shape, and is inserted into the segment core C before lamination mounted on the core receiving plate 7 and the specific slot groove 1 of the laminated core layer. It

The automatic lamination of the segment cores C by the above apparatus is performed as follows. As shown in FIG. 3 at the rising end of the lifting / lowering body 6, the segment core C is placed on the tip of the core receiving plate 7 located at the retracted end. The positioning of the segment core C with respect to the core receiving plate 7 is performed by advancing the core pressing rod 8 so that the pressing portion 8a at the tip of the core pressing plate 8 has a specific slot groove 1 (7 slot grooves 1 in the case of the embodiment) of the segment core C. It suffices if the segment core C is inserted into the core receiving plate 7, and it is not necessary to position the segment core C on the core receiving plate 7 with high accuracy. When the segment core C is placed on the core receiving plate 7, a motor (not shown) is activated and the ball screw 11 rotates, whereby the lifting body 6 moves.
It descends to the stacking position shown in FIG. 1 and stops. next,
The motor 19 rotates by the set number of rotations, the core receiving plate 7 having the segment core C mounted on the tip thereof advances in the radial direction of the laminating jig A, and the tip surface 7 b of the laminating jig A moves. Abut the stacking column 2 (Fig. 10). In this state, a slight gap is formed between the outer peripheral end surface of the segment core C mounted on the core receiving plate 7 and the stacking column 2.
Next, the rod 24a of the advancing / retreating cylinder 24 projects,
The core pressing rod 8 advances along the radial direction of the laminating jig A, and the pressing portion 8a at the tip thereof is inserted into the specific slot groove 1 of the segment core C placed on the core receiving plate 7, In this state, the segment core C is slightly moved forward until the outer peripheral end face of the segment core C contacts the stacking column 2 (FIG. 11), and the outer peripheral end face of the segment core C mounted on the core receiving plate 7 is stacked. When in contact with the column 2, a wedge-shaped pressing portion 8a at the tip of the core pressing rod 8 is provided.
Are also inserted into the corresponding slot grooves of the laminated core layers immediately below the segment core C (see FIGS. 11 and 1).
3) The positioning of the segment core C in the circumferential direction is performed, and at the same time, the outer peripheral end surface of the segment core C abuts the stacking column 2 of the stacking jig A, thereby performing the positioning in the radial direction. After that, when the core receiving plate 7 is retracted, since the segment pressing core 8 prevents the segment core C from retracting, the segment core C remains at that position as it is, and the laminated core layer immediately below the segment core C is retained. On top of each other and stacked (FIGS. 12 and 14). After that,
The motor 19 is rotated by the set number of rotations in the opposite direction, and the core pressing rod 8 is retracted. This completes the stacking of one segment core C.

Next, the indexing table 4 is rotated by a set angle (30 ° because the core is divided into 12 in this embodiment) so that a new laminated portion of the laminating jig A is received at the core at the laminating position. While facing the plate 7, the elevating body 6 is lifted to the rising end, the next segment core C is placed on the core receiving plate 7, and the same operations as described above are performed. After stacking up to the uppermost stage, the stacking jig A is integrated with the segment core C by welding, whereby the segment core C
While maintaining the stacking posture of, the stator itself constitutes a part of the stator core.

The segment core C of the above embodiment is
Since the number of slot grooves 1 provided inside is odd, the pressing portion 8a at the tip of one core pressing rod 8 is inserted into one slot groove 1 at the center, and this core pressing rod is inserted. Even if the segment core C is slightly slid on the upper surface of the core receiving plate 7 by advancing 8, the segment core C is balanced in the left-right direction, and therefore is not displaced in the left-right direction. It can be moved forward as it is. However, as shown in FIG. 15, when the number of slot grooves 1 provided inside the segment core C ′ is an even number, the left and right balance during the movement of the segment core C on the upper surface of the core receiving plate 7 is balanced. For the purpose of illustration, it is necessary to insert the pressing portions 8a of the core pressing rods 8 into the two slot grooves 1 that are symmetric with respect to the center line and move the segment core C ′ on the upper surface of the core receiving plate 7.

[0014]

According to the present invention, a basket-shaped laminating jig is integrally installed on the upper surface of an indexing table, and an elevating body is attached to a column so that the elevating body can be moved up and down. Even if the indexing table rotates inside the stacking jig, the inner stacking device in which the pressing rod is attached so as to independently advance and retreat along the radial direction of the stacking jig does not rotate integrally with this. In this state, the segment core is placed on the core receiving plate located at the backward end, and the elevating body is lowered until the core receiving plate reaches the stacking position. Then, the tip end surface is brought into contact with the stacking column of the stacking jig, and then the core pressing rod is advanced to make a wedge-shaped pressing portion of the tip end of the segment core mounted on the core receiving plate, and Insert into the corresponding slot grooves of the laminated core layers directly below Since the segment cores are positioned by pressing and pressing, the core receiving plate is retracted after that, and the segment cores are laminated, so that the positioning accuracy of the segment cores with respect to the core receiving plate is improved. Without increasing the mechanical rigidity of the inner stacking device, the segment core of the AC machine, which was conventionally done manually, can be automatically laminated, and the work efficiency is remarkably high. To be enhanced.

[Brief description of drawings]

FIG. 1 is a schematic front view of a core laminating apparatus according to the present invention.

FIG. 2 is a perspective view of a stacking jig A integrally installed on an indexing table 4.

FIG. 3 is a plan view showing a relationship between a stacking jig A and an inner stacking device B.

FIG. 4 is a plan view of an inner stacking device B.

FIG. 5 is a front view of the same.

FIG. 6 is a side view of the same.

7 is a sectional view taken along line XX of FIG.

8 is a cross-sectional view taken along line YY of FIG.

FIG. 9 is a partially enlarged perspective view showing the stacking action of the present invention.

FIG. 10: The core receiving plate 7 having the segment core C mounted on the tip thereof advances to the forward end, and the tip end surface 7b thereof has the laminating jig A.
It is a top view of the state where it abutted on the stacking pillar 2.

11 is a plan view showing a state in which the core pressing bar 8 has advanced in the state shown in FIG. 10 and the segment core C mounted on the core receiving plate 7 has been circumferentially positioned. FIG.

FIG. 12 shows the core receiving plate 7 in the state shown in FIG.
FIG. 6 is a plan view showing a state in which the device has been retracted to the retracted end.

13 is a side view of the state shown in FIG. 11. FIG.

FIG. 14 is a side view showing a state in which the segment core C placed on the core receiving plate 7 is dropped by retracting the core receiving plate 7 in the state shown in FIG. 11.

FIG. 15 is a plan view showing a state in which two core pressing rods 8 are used to position a segment core C ′ having an even number of slot grooves 1.

FIG. 16 is a perspective view of a stator core S of a large AC machine.

[Explanation of symbols]

 A: Stacking jig B: Inner stacking device C: Segment core 1: Slot groove 2: Stacking pillar of stacking jig 3: Ring plate of stacking jig 4: Indexing table 5: Column 6: Lifting body 7: Core holder Plate 8: Core pressing rod 8a: Core pressing rod pressing portion

Claims (1)

[Claims] 1. A single-layer thin ring-shaped core is equally divided in the circumferential direction into a large number of ring-shaped segment cores, and the upper and lower sides of a large number of stacking columns arranged at equal intervals along the circumferential direction. A device for automatically stacking the segment cores by using a cage-shaped stacking jig whose ends are integrally connected by a ring plate, and the stacking jig is integrally installed on the upper surface of the indexing table. Then, the inner stacking device is arranged inside the stacking jig so as not to rotate integrally with the indexing table even if the indexing table rotates. The core receiving plate is attached to the elevating body so as to be movable back and forth along the radial direction of the stacking jig, and the tip end portion is provided in the slot groove inside the segment core placed on the core receiving plate. Partially inserted and the segment cores A core pressing rod for pressing against the supporting column is configured to be attached to the elevating body so as to be able to move forward and backward in the same direction as the core receiving plate, and the segment core is placed on the core receiving plate located at the backward end, With the elevating body lowered until the core receiving plate reaches the stacking position, the core receiving plate is moved forward and its tip end is brought into contact with the stacking column of the stacking jig, and then the core pressing rod is moved forward. Then, the wedge-shaped pressing portion at the tip thereof is inserted into each of the corresponding segment groove grooves of the segment core placed on the core receiving plate and the laminated core layer immediately thereunder, and the segment core is pressed. The core stacking device is configured to stack the segment cores by performing the positioning, and then retracting the core receiving plate.