JPH0453089B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing an EI laminated iron core.

[Conventional technology and its problems]

EI laminated iron cores are made by forming protrusions using a punch on each I-type or E-type iron core, and simultaneously fitting the overlapping protrusions of the upper iron core into the protrusion recesses of the lower iron core during punching and forming. It is laminated and swaged together.

The manufacturing method of this EI laminated iron core is as shown in FIG. 12. First, E iron core 3,
3' is removed so that the cut portions 3 and 3'a face each other to form a continuous pair (dashed lines in the figure), and the strip-shaped iron core plate 1 is transferred to each processing station A, B, C, and D. send to.

In the first station A of the processing step, projections 4 are formed in the notches 3a, 3a' and the material removal parts of the E iron cores 3, 3' using a downward punch, respectively, as shown in FIG. 2. At station B, use the punch 9 to punch the cut portions 3a, 3.
A' is punched out to obtain an I-iron core 2, and the I-iron core 2 is dropped into a lower die 6 and laminated, and at the same time, the protrusion 4 of the overlapping upper and lower I-iron cores 2 and 2 are fitted into the recessed part. The recessed portion is formed by protrusion of the protrusion 4 by the downward punch.

Next, at the third station C, one E iron core 3 is punched out from the band-shaped iron core plate 1 using a punch, and the one E iron core 3 is placed in the lower die 7.
The iron cores 3 are dropped and stacked, and at the same time the protrusions 4 and recesses of the overlapping upper and lower E iron cores 3 and 3 are fitted together, and then at the fourth station D, the other E iron core 3' is punched out using a punch. At the same time, the other E iron core 3' is dropped into the lower die 8 and laminated, and at the same time the upper and lower E iron cores 3' are overlapped.
Fit the protrusion 4 of 3' and its recessed part.

In this action, the support during stacking of each iron core 2, 3, 3' is performed by the same structure and action,
For the I-iron core 2, this is done by a retaining ring 10 on the lower surface of the lower die 6 shown in FIG. That is, the inner circumference of the retaining ring 10 is narrower by about 3/100 mm over the entire circumference than the hole of the lower die 6, and the I iron core 2 is press-fitted into the retaining ring 10 by the downward force of the punch 9. Retaining ring 1
Support with 0 side pressure. For this reason, as shown in the figure, as the punch 9 is punched downward, the I-iron core 2 is lowered into the retaining ring 10 one by one, and the projection 4 is fitted into the recessed portion thereof.

On the other hand, when forming the projections 4, the punch descends deeper than usual for each required number of laminated I-iron cores 2, and punches out the holes without forming the projections 4. Therefore, the fitting of the protrusions 4 of the I-iron core 2 is not performed for each required number of I-iron cores 2, and the I-iron core 2 is fitted with the required number of laminated I-iron cores.
a and descends through the lower die 6 and the retaining ring 10, and when the separation surface passes the lower surface of the retaining ring 10, it falls onto the conveyor 11 running perpendicular to the feeding direction of the strip-shaped iron core plate 1, as shown by the chain line. sent to the required location.

If the sent laminated iron core 2a is in a semi-caulked state, it is re-pressed and re-crimped.

In addition, to form the above-mentioned through-holes, a through-hole punch is separately provided before the protrusion 4-forming punch, and this punch is applied to each of the required number of sheets to form the through-holes, and the protrusion 4-forming punch is then used to form the through-holes. There is also a method of inserting it into a through hole and causing it to swing in vain.

In this manufacturing method, conventionally, as shown in the figure, a band-shaped iron core plate 1 with a width t wider than the width of E iron cores 3 and 3' is used, and the other E iron core 3' is also connected to the fourth station. At D, final processing and forming is performed by punching. That is, the E iron core 3' is attached to the strip iron core plate 1 until the end (it is an integral part). For this reason, each station A, B, C, and D is provided with a belt-shaped iron core plate so as not to deviate from the punching area of each punch.
Because of its large width, it can be fed with ample margin, making it difficult for punching errors to occur.

However, as shown in the figure, two ears 5 are formed on both sides. This ear 5 is a surplus portion and causes an increase in cost. Further, the selvage 5 needs to be disposed of, and conventionally, the selvage 5 is collected by winding it up or cutting it into short pieces with a cutter.

Therefore, a collecting device is required, and there are problems such as the need to dispose of the collecting ear 5 appropriately.

Therefore, if the band-shaped iron core plate 1 is made to have the same width t as the width of the E iron cores 3 and 3', the formation of ears 5 will be eliminated, but after punching one E iron core 3, the other E iron core The iron core 3' becomes free and its handling becomes a problem.

In view of the above points, this invention uses the strip-shaped iron core plate 1 having a width t that is the same as the width of the E iron core, and ensures that the other free E iron core is fed into the lower die and laminated. The task is to do so.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a manufacturing method in which the formation of protrusions and the punching and lamination of I-iron cores and E-iron cores are sequentially performed at each station, as described above, in which each station is positioned in a straight line. The above-mentioned strip-shaped iron core plate having the same width as the E iron core is floated on the straight line so that it can be lowered by the protrusion height of the above-mentioned protrusion from the upper surface of each lower die, and its width direction is regulated by a guide. While feeding, the first station forms the above protrusion, and the second station feeds the I.
The iron cores are punched and stacked as described above, and at the third station, one of the E iron cores whose front side will be the notch is punched and laminated, and the other E iron core, which has been freed by the punching, is fed to the band-shaped iron core plate. Return it to the level on the line, contact the tip edge of the band-shaped iron core plate with its rear edge, and transfer the other E iron core to the fourth station by feeding the band-shaped iron core plate, and place the other E iron core on the positioning stopper. The leading edge of the E iron core is brought into contact with the lower die to position it in the above feeding direction, and the corner protruding from the positioning stopper is fitted into the notch of the other E iron core to position it on the lower die. The structure is such that the above-described drop-in lamination is performed by positioning in the width direction.

[Effect]

In the manufacturing method according to the present invention configured as described above, the I iron core and the E iron core are manufactured in a continuous layered state by feeding the band-shaped iron core plate in the same manner as in the conventional method.

During this action, the belt-shaped iron core plate is fed by floating the protruding portion of the protrusion, so that the feeding can be done smoothly even after the protrusion is formed. Further, during the punching operation, the belt-shaped iron core plate can be lowered, so there is no problem with the punching operation.

The other E iron core, which has been separated and becomes free, is returned to the level above the feed line of the strip iron core plate, so that it is reliably transferred to the fourth station as the strip iron core plate is fed. Furthermore, since the feed direction and width direction are determined at that position, the sheets are reliably dropped into the lower die and stacked.

The reason why the other E-iron core is transferred to the fourth station is because of the existence of a lower die (blade) for removing one E-iron core, the other E-iron core is simultaneously removed into the lower die. This is because drop-in lamination is not possible.

〔Example〕

As shown in FIGS. 1 and 2, the first station A for forming the protrusion 23 and the iron core 25
Second punching station B, one E iron core 29
3rd punching station C, other E iron core 2
9' Fourth station D for pushing is provided one after another in a straight line from left to right, and from the left end, a strip-shaped iron core plate 21 having the same width as the E iron cores 29, 29' is attached to each station A. , B, C, and D intermittently at the length pitch of the pair of E iron cores 29, 29' (see FIG. 12P).

At this time, the band-shaped iron core plate 21 moves in a straight line without shaking while being regulated in its width direction by the guide 50. In addition, in terms of movement,
Pins 38 that can be moved up and down by springs 37 are provided at appropriate intervals (see Figure 2).
8, the belt-shaped iron core plate 21 moves in a floating state by the protrusion height of the protrusion 23, and when pushed from above, it descends as the pin 38 retracts and touches the moving surface (lower die 2
6, 30, 35 top surface). Therefore, there is no problem with the punching action described later.

As the belt-shaped iron core plate 21 moves, first, the first
At station A, four punches 22 are used to punch the notches 27 of the E iron cores 29, 29' and the E iron cores 29, 29'.
A protrusion 23 is formed at each material removal portion 29'. This protrusion 23 includes an I iron core 25 and an E iron core 29,
Since it is formed at the fixed position of 29', when stacking as described below,
The protrusions 23 of the upper iron cores 25, 29, 29' fit into the recessed portions of the protrusions 23 of the lower iron cores 25, 29, 29'. Further, punching is performed in the same manner as in the past for each required number of operations, that is, for each required number of laminated iron cores, which will be described later, to form a through hole without a protrusion 23.

At the second station B, the punch 24
The portions corresponding to the notches of the E iron cores 29, 29' are punched out, and the I iron core 25 is obtained from that portion, and is dropped into the lower die 26, and laminated with the structure and operation shown in FIG. 13. During this processing,
The vertically movable pin 23' in the middle of the third station C is lowered and fitted into the through hole 27 after punching the I iron core 25, thereby positioning it when the punch 24 is in operation.

At the third station C, the punch 28
One of the pair of E iron cores 29, 29' (the one 29 in front in the feeding direction) is punched out, and the lower die 3
0 with the structure and operation shown in FIG. 13 (see FIGS. 6 to 11). Positioning at this time is also performed by the pin 23'.

When punching this E iron core 29,
As shown in the figure, the other E iron core 29' initially pushes the lifting roll 33 and tilts toward you, and the band-shaped iron core plate 29'
When it is separated from 1 and becomes free, it returns to the feeding level of the belt-shaped iron core plate 21 by the lifting of the elevating roll 33, as shown in FIG. The leveling is done by a roll 32 of a fixed drive roll 31, and the rotating force of this roll 32 sends it slightly forward. The lifting roll 33 is urged upward by a spring 34 as shown in FIG.
A groove 39 for the projection 23 to pass through is formed. The roll 32 is constantly rotated by a drive device 46 (see Fig. 1), and the roll 32 is constantly rotated by a drive device 46 (see FIG.
In the state where it is not separated (Fig. 9), it is slipping.

The other E iron core 29', which has been sent forward to some extent by the drive roll 31, is pushed at its rear end by the feeding of the band-shaped iron core plate 21, and is moved to the guide rails 40 on both sides as shown in FIG. is guided by and moves onto the guide plate 47. Then, the E iron core 29' placed on the guide plate 47 is further pushed forward using the guide rail 40 as a guide due to the movement, as shown by the chain line in FIG. 11, and reaches the fourth station D. In FIG. 1, reference numeral 48 indicates a groove through which the protrusion 23 passes, which is formed on the guide plate 47.

The pressed E-iron core 29' moves forward while fitting the notch into the corner 41 of the positioning stopper 42 located in front of it, and stops when it comes into contact with the front surface of the stopper 42 (see FIG. 1). By this contact, the other E iron core 29' is positioned in the feeding direction (left-right direction), and by the fitting of the corner 41, it is positioned in the width direction (front-back direction).
It exactly corresponds to the upper surface of the lamination hole of the lower die 35. Then, the punch 36 descends, and as shown in FIGS. 4 and 5, the slide plate 44 is moved backward against the spring 43, and the other E iron core 29' is pushed down into the lower die 35. They are laminated with the structure and operation shown in FIG.

The above actions are performed continuously, and the I iron core 25, E
The required number of iron cores 29, 29' are continuously formed in the lower die 26, 30, 35 in a stacked state.

Although this embodiment shows the processing process for one strip of iron core plate 21, if this process is performed in multiple stages, that is, if they are arranged in parallel, the EI laminated iron cores can be formed in accordance with the number of rows. Obtainable.

〔effect〕

The present invention is constructed as described above and uses a band-shaped iron core plate having the same width as the E iron core, so that unlike conventional iron cores, selvage does not occur, and material costs can be reduced.

In addition, since the E iron core which has been separated and becomes free is also securely positioned on its leg side and laminated on the lower die, the tip end surfaces of the legs, which are the most important part of the laminated iron core, are accurately aligned.

[Brief explanation of the drawing]

The drawings show a method for manufacturing an EI laminated iron core according to the present invention, and Fig. 1 is a partially cutaway plan view of one embodiment, Fig. 2 is a longitudinal sectional side view of the same, and Fig. 3 is an enlarged longitudinal sectional view of the transfer device. Front view, Figures 4 and 5 are longitudinal enlarged front views showing the removal punch portion, Figures 6 to 8 are plan views of the manufacturing process, and Figures 9 to 11 are longitudinal side views of the same. , FIG. 12 is a plan view showing the conventional manufacturing process, and FIG. 13 is a longitudinal sectional side view of the same main part. 21...Striped iron core plate, 22...Punch, 23...
... Protrusion, 24 ... Punch punch, 25 ... I iron core, 26, 30, 35 ... Lower die, 27 ... Notch, 28 ... Punch punch, 29, 29'
...E iron core, 36...Drop punch, 41...
... Corner, 42 ... Positioning stopper, A, B,
C, D... Processing station.

Claims (1)

[Claims] 1. On the strip-shaped iron core plate 21, the E iron cores 29, 29' are continuously formed into a pair with their notches facing each other, and then punched downward at the first station A. 22, a protrusion 23 is formed in the notch and the material removal part of the E iron cores 29, 29', respectively.
is formed, and the cut portion 27 is punched out using the punch 24 at the second station B to form the I iron core 25.
At the same time, the I iron core 25 is placed inside the lower die 26.
The upper and lower I that overlap at the same time are stacked and stacked.
Fit the protrusions 23 of the iron cores 25, 25 and their recessed parts, and use the punch 28 at the third station C.
A pair of E iron cores 29, 29' from the strip iron core plate 21
is obtained by punching, and one of the E iron cores 29 is dropped into the lower die 30 and laminated, and at the same time, the projections 23 of the overlapping upper and lower E iron cores 29, 29 are fitted into the recessed parts, and then the fourth station is formed. At D, the other E iron core 29' is dropped into the lower die 35 by the punch 36 and laminated, and at the same time the EI laminated iron is fitted into the protrusion 23 of the overlapping upper and lower E iron cores 29', 29' and its recessed part. In the core manufacturing method, each of the stations A, B, C, and D is located on a straight line, and E iron cores 29, 29' are placed on the straight line.
The above-mentioned strip-shaped iron core plate 21 having the same width as the lower die 2
6, 30, 35 so that it can be lowered by the height of the protrusion 23, and the width direction of the protrusion 23 is regulated by the guides 40, 50 to form the protrusion 23 at the first station A; Second
At station B, the above punched I iron cores 25 are laminated, and at third station C, the front side has a notch 2.
7, one of the E iron cores 29 is punched and laminated, and the other E iron core 29', which has been freed by the punching, is returned to the level above the feed line of the strip iron core plate 21, and the rear end edge is laminated with the above. The tip edge of the band-shaped iron core plate 21 is brought into contact with the other E iron core 29' by feeding the band-shaped iron core plate 21 to the fourth station D.
The tip edge of the other E iron core 29' is brought into contact with the positioning stopper 42 to position it in the feeding direction on the lower die 35, and the corner 41 protruding forward from the positioning stopper 42 is moved to the other side. A method for manufacturing an EI laminated iron core, characterized in that the drop-in lamination is carried out by fitting the E iron core 29' into the notch 27 and positioning it in the width direction on the lower die 35.