JPH03174927A - Manufacturing device for laminated iron core - Google Patents

Abstract

PURPOSE:To prevent distortion, etc., from being generated in a shaft by setting a dividing device on a die, operating the dividing device in accordance with the rotation of a press crank shaft and rotating the die while a punch separates from the die. CONSTITUTION:The die 14 a corresponding to the punch 13a for blanking the outer periphery of iron core single disks 31 is made cylindrical. A dividing device 21 which rotates an angle by one slot or several slots round the point symmetrical shaft of the iron core simple disks is set to the die 14a. The dividing device 21 is actuated in accordance with the rotation of the press crankshaft operating the punch 13a. While the punch 13a separates from the die 14a, the die 14a is rotated. In such a manner, in the laminated iron core of a stator, as well, it is possible to obtain a laminated iron core having improved parallelism between the upper and lower surfaces after the cores are laminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to an apparatus for manufacturing a laminated core for a rotating electric machine.

[Prior Art] Conventionally, equipment for manufacturing laminated cores that constitute the armature of rotating electric machinery devices processes the process from forming a single core plate to completing the laminated core in a multi-stage progressive mold. something is proposed. For example, in JP-A-52-47563, as shown in FIG. A stripper 54 is attached to be movable up and down along the post 53, and this stripper 54
Various punches 59 are attached to the lower surface of the upper mold 51 in a hanging position, and dies 60 are arranged on the lower mold 52 in correspondence with these punches 59 . Then, various punches 59 are used to punch out the thin plate material 55, and the final punch 56 is used to punch out the outer periphery of the core veneer 57 from the thin plate material 55, and the previously punched core veneer 57 is sequentially caulked to form a laminated core 58. An apparatus for manufacturing is disclosed.

The laminated core 58 thus manufactured with the above apparatus is
As shown in FIG. 6, the core single plates 57 were stacked one on top of the other so that the slots 62 were tilted (skewed) at 5° to 30° with respect to the axis. Note that in FIG. 6, reference numeral 61 is a central shaft hole.

In addition, as described above, without skewing, the thin plate material is punched out and stacked in the same angular phase as the punched material, so as to be equally spaced in the center axis hole 61 and the circumferential direction, as shown in FIG. A laminated core 58 is obtained by laminating core single plates 57 each having a shape having a large number of slots 60.

[Problems to be Solved by the Invention] However, the thickness of the single plate of the laminated iron core is uneven due to the deflection of the rolling roll that occurs during the production of the thin iron plate that is the raw material, and therefore the above-mentioned problems arise. When a laminated core is manufactured by laminating layers using conventional manufacturing equipment, deviations in stacking thickness occur in the laminated core.

In the case of armatures, such deviations in the stacking thickness cause deterioration of parallelism and uneven balance during rotation, leading to decreased performance of rotating electrical machines and generation of abnormal noises, so balance work should be carried out as necessary. Must. Furthermore, in the stator as well, the influence on the parallelism of the laminated core is unavoidable.

The purpose of this invention was to eliminate the drawbacks of the conventional manufacturing technology described above, and the purpose of this invention is to disperse the non-uniformity of the thickness of the thin plate material in the internal direction of the laminated iron core veneer, thereby To provide a manufacturing device for a laminated iron core capable of obtaining a well-balanced laminated iron core with almost no deviation in stacking thickness.

[Means for Solving the Problems] The laminated iron core manufacturing apparatus according to the present invention has a multi-stage structure including an upper mold formed to be vertically movable by a press crankshaft, and a lower mold formed in correspondence with the upper mold. A progressive mold, comprising a plurality of punches assembled in a hanging state from the lower surface of the upper mold, and a plurality of dies arranged in the lower mold corresponding to the plurality of punches, and arranged in the mold. Punch out the outer periphery of the core veneer from a thin sheet material using a punch, and push the punched core veneer into the die of the lower mold corresponding to the punch, thereby removing the previously punched core veneer. In a laminated core manufacturing apparatus that manufactures a laminated core by sequentially performing plate and caulking processing, the die corresponding to the punch for punching the outer periphery of the core veneer is a cylindrical die, and the die has a dot on the core veneer. An indexing device is mounted for rotating the angle by one or more slots about an axis of symmetry, the indexing device being actuated in response to rotation of the press crankshaft actuating the punch, and the indexing device being remote from the punch or the die. It has a configuration in which a die is rotated in between.

[Function] In the present invention, the die corresponding to the bunch for punching the outer periphery of the iron core veneer is a cylindrical die, and this die has an indexing die that rotates the angle by one slot or several slots about the point symmetry axis of the iron core veneer. The indexing device is operated in response to the rotation of the press crankshaft that operates the punch, and rotates the die while the punch is away from the die.
When punching the outer periphery of a core veneer, the die does not rotate, and the core veneer punched from a thin sheet material can be accommodated in the die as it is at an angle phase of S. Then, while the punch or die is away from the die, After rotating the die through an angle corresponding to one slot or several slots about the point symmetry axis of the iron core veneer, the rotation of the die is stopped, and the next iron core veneer is punched out and caulked with the previously punched iron core veneer. Since it is possible to manufacture a laminated core by sequentially manufacturing a laminated core, the core single plates are laminated with an angular phase shifted by one slot or several slots to form a laminated core. Therefore, non-uniformity in the thickness of the core veneers is dispersed in the circumferential direction of the laminated core veneers, and a well-balanced laminated core with almost no deviation in thickness can be easily obtained. In addition, it is possible to eliminate the imbalance during rotation caused by the iron core, and to improve the parallelism of the upper and lower surfaces after lamination.

In addition, since the layers are stacked based on the inner circumference of the cylindrical die, when assembling the rotor shaft, the uneven thickness of the shaft hole can be distributed in the circumferential direction, which is effective in preventing distortion of the shaft.
Also, in the laminated core of the stator, it is possible to obtain a laminated core that improves the parallelism of the upper and lower surfaces after lamination.

[Example] Hereinafter, an example of the fI layer core manufacturing apparatus of the present invention will be specifically described.

FIGS. 1 to 3 show an example of a laminated core manufacturing apparatus according to the present invention. Type 11
A plurality of bunches 13 assembled to the punch 13, a plurality of dies 14 disposed on the lower die 12 corresponding to the punches 13, and a single iron core plate disposed at the last position of the plurality of bunches 13. It is composed of a bunch ↓3a for punching out the outer periphery, a die 14a corresponding to this bunch, a rotating device 20 for rotating this die 14a, and the like.

As the device S according to the present invention, conventionally known devices can be used except for the device related to the die 14a that supports the core single plate 31 whose outer periphery has been punched out. That is, the upper mold 11 of the multistage progressive mold 10 is supported by a press slide 41, and this press slide 41 is formed to be vertically movable by a press crankshaft 42 via a connecting rod 43. A bunch holder 15 is attached to the lower surface of the upper die 11, and a stripper plate 16 is attached to the lower part of the punch holder 15 (FIG. 2).

A plurality of bunches 13 are attached to the bunch holder 15 in a hanging state and pass through the stripper plate 16. In addition, by a predetermined bunch, the iron core veneer 3
At a portion corresponding to one slot 32, recesses 33a to 33e for fitting alignment or the same number of holes 34a as recesses 33a to 33e are formed. As shown in FIG. 1, this fitting alignment hole 34a is designed so that when the core veneers are laminated by caulking, they can only be caulked with the previously punched core veneer. , which engage with protrusions 35a to 35e that are formed when forming recesses 33a to 33e for positioning the next core veneer.

Further, the lower mold 12 is mounted on a lower mold stand 1 as shown in FIG.
A die plate 12b is provided on top of the die plate 2a.
It is formed on the machine stand 17 placed on the press holder 44. A plurality of dies 14 are formed on the lower die 12 in correspondence with the plurality of punches 13. These plurality of bunches 13 sequentially perform predetermined punching from the thin plate material K, and the last punch 13a punches out the outer periphery of the iron core single plate 31. Lower mold 1 corresponding to this last bunch 13a
A hole 18 is formed in the die 2 and the machine base 17, and a die 14a is rotatably attached to the hole 18. In addition, upper mold 1
A pin lla is fixed to 1, and this pin lla is inserted into the index positioning holes 19a to 19a of the die 14a, which will be described next.
19e.

The die 14a corresponding to the punch 13a for punching the outer periphery of the iron core veneer has a cylindrical shape, and in this example, index positioning holes 19a to 19 are provided on the upper surface of the cylindrical die 14a.
Five cylindrical dies 14a are formed, and a gear 14b is formed on the lower outer periphery of the cylindrical die 14a. This die 14a is rotated in conjunction with a rotation device 20. That is, the rotation device 2
0 consists of an indexing device 21 and a drive device 22 that drives the indexing device 21.

The indexing device 21 is linked with the press crank shirts 1 to 42 that drive the upper mold 11, and a known means is used as the drive device 22 that drives the indexing device 21. For example, as shown in FIG. 2, as the drive device 22, a pulley 22a is provided at the end of the input shaft 21a of the indexing device 21, and a pulley 22b is also provided at the end of the crankshaft 42. and these pulleys 22a
, 22b.

The indexing device 21 is provided with an output shaft 21b,
A gear 21c is formed on this output shaft 21b.

This gear 21c meshes with a gear 14b formed on the die 14a, and is controlled by the indexing device 21.

That is, the indexing device 21 has a timing belt 22.
The input shaft 21a driven by C is outputted within the device 21 to a predetermined output, that is, to rotate the die 14a by an angle of one slot or several slots about the point symmetry axis of the single iron core plate 31.

Next, the operation of the above device will be explained.

Similar to the conventional multistage progressive mold, the thin plate material is moved in the direction of the arrow in FIG. 3 by a device not shown, but at this time, as shown in FIG. Predetermined punching is performed sequentially, and the punch 13
Punch out the outer periphery of the thin veneer using a and make the iron core veneer 31.
is formed. When punching out the outer periphery of the iron core veneer 31, when the upper die 11 is lowered, the pin lla fixed to the upper die 11 first fits into the index positioning hole 19a provided on the upper surface of the die 14a, fixing the die 14a. do.

Next, using the punch 13a, the iron core veneer 31 is removed from the thin plate cable material K.
is punched out, but this punched iron core veneer 31 is
It is housed in the die 14a with the same angular phase, and is caulked with the previous iron core veneer. Next, the punch 13a separates from the die 14a and descends again, but at this time, the indexing device 21 is driven by the input shaft 21a driven by the timing belt 22c, and the gear 21c formed on the output shaft 21b of the indexing device 21 is driven. The die 14a rotates by a predetermined amount and is rotated by the gear 14b of the die 14a that meshes with the gear 21c. That is, it rotates by an angle corresponding to one slot or several slots about the point symmetry axis of the single iron core plate. Next, in the same way as described above, the core veneer 31 is punched out from the thin plate material K by the punch 13a, or the punched core veneer 31 is pushed into the tie 14a of the lower die 12 in the punched state. Then, the laminated core 30 is manufactured by sequentially caulking the previously punched core veneer.

That is, in the manufacturing apparatus S for the laminated core 30, after the core single plate 31 punched from the thin plate material K is pushed into the cylindrical die 14a with its angular phase, the indexing device 21 of the die 14a By enclosing one slot or several slots of the iron core veneer 31 and repeating this process, the angular phase of the iron core veneer 31 sequentially changes by one slot or several slots, as shown in FIG. A laminated iron core 30 that is shifted by a minute is obtained. In FIG. 4, the mutual phase shift between the core veneers 31 in the laminated core 30 is caused by the fit positioning recesses 19a, 19 provided in the portions corresponding to the slots 32 of each core veneer 31.
b.

19c, 19d, and 19e are shown.

In the above embodiments, the manufacture of the laminated core of the armature has been described, but the present invention is applicable to
It can also be applied to the production of I-iron cores.

[Effects of the Invention] As described above, according to the manufacturing apparatus of the present invention, the die corresponding to the punch for punching the outer periphery of the iron core veneer is equipped with a cylindrical die, and the die has a cylindrical die. An indexing device is mounted that rotates the axis by one or more slots, the indexing device being actuated in response to the rotation of the punch-actuated press crankshaft and rotating the die while the punch is away from the die. Since the iron core veneer is punched out from a thin sheet material, a laminated iron core can be obtained in which the iron core veneer is rotated by an angle corresponding to one slot or several slots about the point symmetry axis of the iron core veneer.

The laminated cores inserted by this device are laminated based on the inner circumference of the cylindrical die, so when assembling the rotor shaft, uneven thickness in the shaft hole can be dispersed in the circumferential direction, and distortion of the shaft can be avoided. It is possible to obtain a laminated iron core that is effective in preventing the occurrence of , and also improves the parallelism of the upper and lower surfaces after lamination in the fI layer iron core of the stator.

As described above, according to the device of the present invention, it is possible to eliminate deviations in the thickness of the laminated core, eliminate imbalance during rotation caused by the core, and improve the parallelism of the upper and lower surfaces after lamination. A laminated iron core that is effective in preventing shaft distortion due to rotor shaft assembly and generation of abnormal noise during rotation of the rotor can be manufactured very easily.

[Brief explanation of drawings]

1 to 4 show the manufacturing apparatus of the present invention, FIG. 1 is a longitudinal sectional view of the main parts of the manufacturing apparatus, FIG. 2 is a plan view of the indexing device of the rotating part and the die part, and FIG. An explanatory diagram of lamination of iron core veneers showing an example of lamination, FIG. 4 is an overall configuration diagram of a manufacturing device, FIGS. 5 to 7 show a conventional example, and FIG. FIGS. 6 and 7 are perspective views of laminated cores of armatures manufactured using conventional manufacturing equipment. 10...Mold, 11...Upper mold, 12...
- Lower mold, 13... Punch, 13a... Punch for punching out the outer periphery of the iron core veneer, 14... Die, 14a... Die corresponding to the punch that punches out the outer periphery of the iron core veneer, 21... Indexing device, 22... Drive device, 30
...Laminated core, 31...Single plate core, 42...
・Press crankshaft, S...manufacturing equipment.

Claims (1)

[Claims] 1. A multistage progressive mold consisting of an upper mold formed to be vertically movable by a press crankshaft and a lower mold formed corresponding to the upper mold, the mold being suspended from the lower surface of the upper mold. It consists of a plurality of punches assembled in the same state and a plurality of dies arranged in a lower mold corresponding to the plurality of punches, and the punch punches the outer periphery of the iron core veneer arranged in the mold. A laminated core is manufactured by punching out the outer circumference of a core veneer from the material and pushing the punched core veneer into a die of a lower die corresponding to the punch, which is sequentially caulked with the previously punched core veneer. In the laminated core manufacturing apparatus, the die corresponding to the punch for punching the outer periphery of the core veneer is a cylindrical die, and the die has a cylindrical die that rotates by one slot or several slots with respect to the point symmetry axis of the core veneer. manufacturing of a laminated iron core by rotating the die while the punch is away from the die; Device.