JPH05336A - Die assembry of laminated iron core - Google Patents

Abstract

PURPOSE:To change the rotary angle of the rotary die for laminating rotatively or skewing without reembining the rotary operating device and to simplify the rotary angle changing device in the case when the laminated iron core is manufactured with the die. CONSTITUTION:In a die device that a laminated iron core piece provided with a projection for cauking is punched to the rotary die part with a press, and the cauking between the laminate core billets with this projection for caulking on this rotary part, these are the controller 42 which outputs the rotary command by inputting the stroke signal of the press and the signal of the thickness deviation of sheets and outputs together by adding the rotary angle to laminate rotatatively on the skewing angle in order to eliminate the thickness deviation of sheets, and the die assembly of the laminated iron core which is set with the servo motor 41 to rotate the rotary die part 22 connected with the power connecting body by inputting the signal of the above device 42. The rotary die part can be rotated to the desired angle without seembining the rotary operating device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a progressive die device for manufacturing a laminated core, which has a skewing mechanism for forming slots of the laminated core and a laminating function for eliminating the plate thickness deviation of the laminated core piece.

[0002]

2. Description of the Related Art A laminated core is manufactured by a progressive die apparatus as shown in FIG. 3 in view of productivity and goodness of manufactured products. In the figure, reference numeral 1 is a strip which is a material of a laminated iron core piece and is supplied between the stripper plate 2 and the die plate 3, and is punched by the punches 5 and 6 in the first station 4 as shown in FIG. 8 is drilled. Punch 10 at the second station 9,
A shaft hole 12 and a slot 13 are bored by 11.

In the third station 14, a cut-and-raised protrusion hole 15 and a cut-and-raised protrusion 16 which communicate with the escape hole 7 are provided as an example of a caulking protrusion. Further, in the third station 14, the step of cutting and raising the projection 16 by the punch 17 as shown in FIG. 6 is carried out every time the strip 1 is fed by a predetermined number of pitches. When this step is carried out, the cutting projection is carried out. Corresponding through holes 18 are formed.

The fourth station 19 is an idle station and is not processed. When the fifth station 20 is reached, the punch 21 and the rotary die portion 22 serve as rotor lamination to remove the outer shape of the iron core component 23, caulking and skewing. As shown in FIG. 7, the iron core component 23, which has been processed and drawn into the die portion 22, has the cut and raised protrusions 15 of the preceding iron core component in the cut and raised protrusion holes 15 of the preceding core component. Are fitted and joined together.

Next, a mechanism for performing skew processing will be described with reference to FIGS. 8 and 9. In the die portion 22 of the die device for performing the skew processing, a die plate 24 and a die holder 25 are rotatably supported via bearings 26, and a sprocket 27 is provided on the outside thereof.

The ring chain 28 suspended on the sprocket 27 passes through a groove 29 provided in the die holder 25 and is suspended on a sprocket 31 attached to the output shaft of a speed reducer 30 provided outside the die holder 25. There is.

The indexing means comprises a roller cam indexing device 32 and a speed reducer 30, and operates within a range of 180 degrees including the top dead center in one stroke of the press (360 degrees) to index 30 degrees. Then reducer 3
In step 4, the indexed angle is converted into an even smaller angle (skew-equivalent angle).

On the other hand, a pulley 34 is provided at the crank shaft end portion 33 of the press for performing the outer shape cutting, caulking and skewing, and the rotation of the crank shaft is the belt 35, the pulleys 36, 37, the belt 38 and the pulley 3.
9. The structure is such that it is transmitted to the input shaft of the roller cam index device 32 via the universal joint 40.

In the mold apparatus having such a skew ink mechanism, the link tune 28 is driven by an amount corresponding to the skew amount, and the die portion 22 together with the sprocket 27 is rotated by an angle corresponding to the skew.

By thus punching with a press while rotating the rotary die portion 22, a skew having a desired inclination is formed in the laminated core component piece 23.

By the way, the strip 1 which is the material of the iron core constituting piece 23 does not have a uniform plate thickness in the strip plate width direction due to the bending of the roll during rolling. There is deviation within the plane.

Although the iron core component 23 drawn into the rotary die portion 22 is offset by the skew angle, the iron core component 23 is superposed in almost the same posture. The properties are almost the same, so that the laminated core formed of them exhibits a slope called a banana shape and becomes a defective product.

As a die apparatus for preventing such inconvenience, for example, Japanese Unexamined Patent Publication (Kokai) No. 60-92023 proposes a progressive die apparatus for manufacturing laminated cores which performs skewing function and rolling stacking for offsetting plate thickness deviation. This is a differential gear device which is provided with an electric motor for applying a skewing rotational force to a rotary die part, an index device for converting a stroke of a press machine into a rotary output, and which receives the rotary output and transmits it to the rotary die part. Is further provided, so that rotation and stacking can be provided.

According to this, there is an effect that the generation of the panana shape is prevented.

[0015]

According to the above-mentioned proposal, there is a progressive die apparatus capable of both skewing and rolling rotation to manufacture a laminated iron core. The transmission means is installed on the side surface of the mold device in a protruding form, which causes a problem that safety is decreased, installation space is increased, and the device is complicated.

Further, the rotary die portion is rotated by an angle corresponding to the skew angle and the rotation rotation angle, and the rotation rotation angle depends on the degree of deviation of the thickness of the laminated core component pieces and the number of skews provided on the iron core. Need to change. When making such a change, the index device must be replaced each time, which is troublesome.

[0017]

SUMMARY OF THE INVENTION The gist of the present invention is to punch a laminated iron core piece having concentric circles provided with caulking projections at equal pitch intervals into a rotatable rotary die portion by a press, and at the same time, to rotate the rotary die portion. In the mold device of the laminated iron core for performing the caulking between the laminated iron core pieces by the crimping protrusion, the stroke signal of the press and the plate thickness deviation signal of the laminated iron core piece are input, and the rotation command is output by the stroke signal, A controller for adding and outputting a rotation angle for stacking and a skew angle separately input so as to eliminate the plate thickness deviation according to the plate thickness deviation signal, and a signal input from the controller for connection by a power connecting body A metal mold device for a laminated iron core is provided with a servo-motor for rotating a rotary die part.

[0018]

According to the present invention, a control device for inputting the stroke of the press and the plate thickness deviation signal of the iron core component and outputting the rotation angle for skewing and the skewing rotation angle for eliminating the plate thickness deviation is provided, and the control is performed. Since a servo-motor for inputting a signal from the device and rotating the rotary die part is connected to the rotary die part via a power transmission body, it is projected on the side surface of the conventional index device and the mold device. The power transmission means to the installed index device is not required, so that the device can be simplified, the installation space can be reduced, and the safety can be improved. Furthermore, even if it becomes necessary to change the stacking angle, this can be dealt with without changing the device.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings based on one embodiment. The same elements as those shown in FIGS. 3 to 9 are designated by the same reference numerals, and the description thereof will be omitted or simplified. FIG. 1 and FIG. 2 show the essential parts of a mold device for a laminated iron core in this embodiment. Reference numeral 21 is a punch of the press, 22 is a rotary die portion, 23 is an iron core component piece, and as described above, these are provided with the cut and raised projection holes 15, the cut and raised projections 16 and the escape hole 7 for skewing. It is caulked in the die portion 22. 24 is the die plate 2
5 is a die holder, 26 is a bearing, and 27 is a sprocket. Reference numeral 28 denotes a power transmission body that transmits rotation, and for example, a timing belt or a chain is adopted.

Reference numeral 41 is a servo-motor for rotating the rotary die portion 22, which is connected to the rotary die portion 22 via the power connecting body 28. A tensioning device can be provided between the servo-motor 41 and the rotary die portion 22 to apply tension to the power connecting body 28. Further, the power connection body 2 of the servo-motor 41 and the rotary die portion 22
The speed of rotation transmission can be adjusted by determining the relative size of the diameters of the points to be multiplied by 8.

Reference numeral 42 denotes a control device for controlling the servo-motor 41, which inputs a stroke signal of a press and a plate thickness deviation signal of an iron core component, and in this embodiment, a rotation operation command is issued every time the stroke signal is input. Is output. Further, the inputted plate thickness deviation signal is compared with the allowable plate thickness deviation value set in the comparator 42-1 in the control device 42, and the turning rotation angle is separately set so as to eliminate the plate thickness deviation depending on its magnitude. It is added to the input skew angle and output.

Even if the input in-plane plate thickness deviation of the iron core component 23 is small, even if the number of laminated layers increases and the laminated iron core becomes a difference in height on the left and right, for example, the turning angle is 90 degrees. As a result, the rotation angle is commanded by adding the skew angle. A rotation angle signal from the controller 42 controls the operation of the servo-motor 41,
2 is rotated. At this time, the servo-motor 41 and the rotary die portion 22 are directly connected by a power connecting body 28 such as a timing belt or a chain, and the operation of the servo-motor 41 can be freely controlled by a command from the control device 42. Therefore, for example, when changing the turning stacking angle, it is possible to change to the desired turning stacking angle without changing the conventional turning stacking angle changing device, and the original operating rate of the press work is increased.

Reference numeral 43 is a stroke detector of the press, 44 is a plate thickness detector of the iron core component strip 1, which detects plate thicknesses at a plurality of positions in the width direction and outputs a deviation signal thereof to the control unit 4.
Output to 2.

In the above-mentioned embodiment, the timing belt and the chain are shown as the power connecting body of the servo-motor rotating die part, but the invention is not limited to this, and a gear or a walk gear can be used.

[0025]

As described above, according to the present invention, the indexing means projecting from the side surface of the mold device is unnecessary, and the stacking and the skewing can be performed, which simplifies the device and saves the installation space. Reduction and further improvement of safety can be achieved. Since the rotation angle of the rotary die portion can be changed without replacing the device such as the conventional indexing means, the operability of the press is enhanced.

[Brief description of drawings]

FIG. 1 is a view showing a partially cutaway cross section of a rotary die partial mechanism of a laminated core die device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a rotary die partial power transmission mechanism of a laminated iron core die device according to an embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view showing the entire mold device for a laminated iron core.

FIG. 4 is a plan view of a laminated core material for a rotor of a motor.

5A is a plan view of a cut and raised projection portion, and FIG. 5B is a sectional view.

6A is a plan view of a cut and raised projection hole, and FIG. 6B is a sectional view.

FIG. 7 is a diagram showing a state in which outline punching, caulking, and skewing are performed by pressing the punch.

FIG. 8 is a sectional view of a rotary die portion.

FIG. 9 is a perspective view showing a power transmission mechanism.

[Explanation of symbols]

 1 Strip 2 Stripper Plate 22 Rotating Die Part 23 Iron Core Component 24 Die Plate 25 Die Holder 26 Bearing 27 Sprocket 28 Ring Chain 41 Servo-Motor 42 Controller 43 Stroke Detector 44 Plate Thickness Detector

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takashi Ono 2-10-1 Komine, Hachimansai-ku, Kitakyushu, Fukuoka Prefecture Mitsui High-Tech Co., Ltd. (72) Hidetoshi Noguchi 2-10-1 Komine, Hachimansai-ku, Kitakyushu, Fukuoka Mitsui High-Tech Co., Ltd. (72) Inventor Masafumi Koyama 2-10-1 Komine, Hachiman Nishi-ku, Kitakyushu City, Fukuoka Prefecture Mitsui High-Tech Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. A laminated core piece having concentric circles provided with caulking projections at a predetermined pitch is punched into a rotatable rotary die part by a press, and the caulking projections are formed at the rotating part. In a die core device for laminating iron cores for performing caulking between laminated iron core pieces, a stroke signal of a press and a sheet thickness deviation signal of the laminated iron core pieces are input, and a rotation command is output by the stroke signal, and the sheet thickness deviation signal is output. To rotate the rotating die part connected by a power connector by inputting a signal from the control device and adding and outputting the rotation angle for stacking and rotation to eliminate the plate thickness deviation. A mold device for a laminated iron core, which is provided with a servo-motor for controlling.