JPS5922309A - Apparatus for manufacturing wound core - Google Patents

Abstract

PURPOSE:To automate the process and to increase the productivity by an apparatus comprising a mechanism for cutting a steel belt being fed from a hoop material in accordance with the operation of the core turning section, a mechanism for conveying the cut steel belt by means of a conveyor belt and for taking up the same, and a forming roller mechanism for bending the steel belt. CONSTITUTION:A steel belt 1 is cut by a cutter 19 at a given position in accordance with the turned length thereof, then the steel belt 1 is subjected to bending by an elastic roller 38 and a roller 39 in accordance with the take-up diameter thereof, and then steel belt 1 is wound round a take-up die 25 for assembling. The above process is repeated in a manner that the steel belts 1 corresponding to the plural turns are taken up with the cutting positions being shifted, thereby to form one group of the steel belts 1. In a similar manner, respective groups of the steel belts are turned while being superposed on the outer side gradually, so as to assemble the core.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for manufacturing a wound core used in electrical equipment such as a transformer.

[Technical background of the invention and its problems] The structure shown in FIG. 1 is generally adopted as a wound core used in a transformer. That is, the steel strip 1a is bent into a cylindrical shape and has slightly different diameters.

1b, 1c...1n are superimposed in the radial direction,
Butt part 2 a g 2 of each copper strip 1 m, -J n
b'+2c...2m is arranged to change its position sequentially at equal angles and return to its original position after each appropriate winding.

As shown in FIG. 2, this method of manufacturing a wound core involves marking the cutting position marks 3a', sb, .
3m, and mark 4 by sawing on the opposite side of the marks 3h, 3b, . . . 3m, and while feeding out this steel strip 1, cut the mark 3m with the cutting blade 5.5', and mark the following marks. Cut the part of 3m-1+...3b13a, put 5 to 10 pieces together as one group as shown in Figure 3, and then return the cutting position to the 3m mark and repeat the same process as the next group. Cut the steel strip l. Each cut copper strip is bent into a circular shape according to the diameter of each winding, and the bent copper strips are overlapped inside and out for each winding in the order of the diameter, so that the marks 4 are aligned. Assemble the 1 group. Similarly, in the next group, each cut copper strip is bent and assembled in order of diameter,
Layer it on the outer circumference side of the previous group to complete the wound core as a whole.

However, in the above method, the process of winding the copper strip, the process of attaching cutting marks and alignment marks, the process of cutting while feeding, the process of bending the copper strip, and the process of assembling are all performed manually. This results in poor productivity, increased man-hours, and high costs.

[Purpose of the invention]

The present invention improves productivity by automating the processes of cutting, bending, and assembling copper strips in the production of wound cores in which copper strips are cut and bent for each winding, and the copper strips are stacked and assembled in order of diameter. The present invention provides a wound core manufacturing device with high winding core production.

[Summary of the invention]

In order to achieve this objective, the wound core manufacturing apparatus of the present invention has the following features:
The cutting mechanism uses a cutting blade to cut the copper strip fed out from the hoop material at a cutting position corresponding to the core winding part, and the cut copper strip is conveyed by a belt and the copper is placed in a winding form rotated by the belt. It is equipped with a winding mechanism for winding up the belt, and a forming roller mechanism for bending the copper belt being conveyed from the opening to the end according to the winding diameter of the winding die.

[Embodiments of the invention]

An embodiment of the present invention illustrated in the drawings will be described below.

FIG. 4 is a schematic configuration diagram showing an embodiment of the manufacturing apparatus of the present invention, and FIG. 5 is an explanatory diagram of the operation of the same apparatus.

In Fig. 4, 11 is an uncoiler that supports the steel hoop material @1, 12 is a stand adjacent to the copper strip feeding side of the uncoir 211, and on this stand 12 there is a gap in the copper strip transport direction. Rows 213m and 13a and rollers 13b and 13b for pinching and transferring the steel strip 1 are provided. One row 2
13g and roller 13b are connected by a belt 14, and rollers 13a and 13b are rotated in the direction of the arrow by a drive belt 15 connected to roller 1.3b at the same peripheral speed as this belt 15.

mouth, 713h+13a and o-ra 13b l 7 sb
A slide pace 17 is provided between the feed screw 16 and the steel strip conveying direction, and this slide pace 17 has a cutting blade 19 that is operated by a cylinder 18 to cut the copper strip 1. It is preparation. As a result, the υ cutting blade 19 is moved according to the copper strip cutting position. The feed screw 16 is rotated by a serve motor 20, and is connected to a position detector 21 such as a pulse generator that detects the rotation M of the feed screw 16, that is, the movement position of the slide pace 17. In the figure, reference numeral 22.22 is a guide that prevents the cut steel strip 1 from overlapping. In the figure, reference numeral 23 denotes a winding die attached to a winding shaft 24, which winds up the cut steel strip 1 one after another. A position detector 25 is provided. The winding shaft 24 is supported by a support 27 that is moved up and down by a feed screw 26, and the feed screw 26 is rotated by a one-rotation morph 29 via a transmission 28. As a result, the p winding die 23 is moved up and down in accordance with the steel strip winding diameter. The drive belt 15 is connected to the drive roller 30. The steel strip J is rotatably supported by rollers 13b, intermediate rollers 31, and tension rollers 32, 33, and is wound along the copper strip conveyance direction between the copper strip cutting point and the winding die 23 and wound around the winding ring 23. They are suspended so that they are in contact with and surround the outer periphery of the. The drive roller 30 is rotated by a serve motor 35 via a belt 34, and the rotation of the drive roller 30 causes the drive belt 15 to rotate in the direction of the arrow in the figure. The drive belt 15 transports the cut steel strip 1 by forward running, winds it onto the winding die 23, and rotates the winding die 23 via the wound steel strip 1.

Note that the tension roller 32 is operated by a cylinder 36, and the contact surface between the drive belt 15 and the winding outer diameter always becomes thicker as the winding diameter of the steel strip 1 to be wound around the winding die 23 changes. The drive belt 15 is connected to the outermost steel strip 1 as shown in FIG.
It works to push against. The tension roller 33 is operated by a cylinder 37 and applies tension to the drive belt 15 so as to wind the steel strip 1 in close contact with the winding die 23 and to prevent the cut portion of the copper strip I from riding up. In the figure, 38 is an elastic roller, 39 is a roller, and this elastic roller 38 and roller 3
Numeral 9 holds the steel strip 1 that is being transported by the drive belt 15 and wound around the winding die 23, and plastically deforms the steel strip 1 into a cylindrical shape corresponding to the winding diameter of the winding die 23. It is.

One elastic roller 38 is connected to the steel strip 1 via the drive belt 15.
It is supported by a support body 41 that is moved up and down by a feed screw 40. The feed screw 40 is rotated by a transmission 42, and the transmission 42 is rotated by the transmission 28 via a υ shaft 43. As a result, the elastic roller 38 is deflected by the biting of the elastic roller 238 and the roller 39 in order to form the steel strip 1 into a cylindrical shape and to increase the forming diameter as the winding diameter of the winding die 23 increases. δ
The position of the elastic roller 38 is adjusted according to the position of the winding shaft 24 so that

In the figure, reference numeral 44 denotes an arithmetic unit, into which manufacturing data 45 corresponding to the configuration of a predetermined wound core is inputted. Then, the sensor receives the cutting blade position detection signal from the position detector 2, calculates it together with the manufacturing data 45, and gives a command signal to the motor 20 to move the cutting blade 19 and slide pace 17 by a predetermined amount. The winding shaft position signal is received from the position detector 25, and calculated in conjunction with the manufacturing data 45, and the drive belt 15 is rotated to rotate the winding shaft 24 (winding form 23) by a predetermined amount and stop at a predetermined stop angle. The sir gives a command signal to the motor 35 to cause it to rotate. Further, a command signal is given to the motor 35 to move the winding shaft 24, the winding die 23, and the elastic roller 38 up and down in accordance with the copper strip winding diameter of the winding die 23.

Here, the concept of giving the stop angle command of the winding shaft 24 and the cutting position command of the cutting blade 19 to the arithmetic unit 44 will be explained with reference to FIG. First, a command to stop the winding shaft 24 will be described.

In the iron core, the cutting position of the copper strip is shifted in the circumferential direction for each winding within one group. Since the lap I″X of the steel strip l is a constant value and the number of times the copper strip is cut in each group is a constant value, the angle β consisting of the copper strip cutting start position and cutting end position in each group is decreases as the number of pieces to be cut increases.For this reason, as the number of hook groups increases, the cutting start position is changed to the cutting start position of the next group, such as the first group and the second group, and the second group and the third group in the iron core. The calculation device 44 calculates the stop angle α of the winding shaft 24 for each group based on the manufacturing data 45, and uses this calculated value for each group. Each time the copper strip is cut in sequence, it is output as a command value, and the serge motor 36 is controlled in accordance with the detection signal of the position detector 25 connected to the winding shaft 124 to position the stop angle of the winding shaft 24. .Furthermore, the rotation angle of the winding shaft 24 is 360°-(n
)xβ+α. However, n is the order of the groups, and the first group is 1. The second group is ke2.

This angle α is 36exm”nT when the thickness of the core due to winding is relatively small compared to the inner diameter of the core. Value (empirical value) rI: Number of wire windings (number of wire cuts) m: Number of cuts per group *D1 tT is the input data. Also, the angle β of the cutting range in the first group is as follows. The cutting position command is the position of the cutting blade 32 in one group when the winding shaft 24 is Each time the copper strip is rotated, the system is controlled by the sensor to perform positioning based on the detection signal from the position detector 21 so that the copper strip cutting position for each winding moves by a wrap amount X value.

A case will now be described in which a wound core is manufactured using the manufacturing apparatus configured as described above. Generally speaking, the cutting blade 19
The steel strip 1 is cut at a predetermined position according to its winding length, and then the steel strip 1 is bent according to the winding diameter using an elastic roller 38 and a roller 39, and then wound into a winding type 25. Take and assemble. This operation is repeated to form a group of steel strips 1 shown in FIG. 3 by winding a plurality of turns of steel strip 1 with the cutting positions shifted.

Then, in the same manner, each group of copper strips is sequentially wound outward to assemble the iron core. The steel strip 1 unwound from the hoop material is passed through the rollers 13aH13Fh*13b, 13b cutting blade 19. The belt 15 is passed between the forming roller 391 and the elastic roller 38, and one end thereof is attached to the winding die 23.

The servo motor 35 rotates the drive belt 15 based on a command from the arithmetic unit 44 until the take-up shaft 24 rotates 360 degrees. The steel strip 1 sandwiched between the drive belt 15 and the roller 13b is formed into a cylindrical shape by the roller 39 and the elastic roller 38 together with the drive belt 15.
It is wound around the winding form 23 which rotates by 5 p. When the winding shaft 24 completes one rotation, the cylinder 18 is operated in response to the signal, and the steel strip 1 is cut by the cutting blade 19.

When the cutting is completed, upon receiving the signal, the servo motor 35 driving the winding shaft powers the drive belt 15 and rotates the winding shaft 24 through 360 degrees. During this time, the computing device 44
In response to the command, the cutting device drive motor 20 rotates the cutting blade 19 by the wrap amount X of the steel strip 1, which is input data.
move. Cutting is performed in the same manner as described above in response to a rotation completion signal of the winding shaft 24. This process is repeated n times, and the steel strip 1 is sequentially cut and wound for each winding, thereby forming the first group of iron cores. The rotation angle of the winding shaft 24 when entering the second group from the first group is determined by the calculation device 44.
At a command value of 3600-β+α, the drive belt 150
Control rotation. Thereafter, cutting, bending, and winding are repeated in the second group in the same way as when cutting the first group. The rotation angle of the winding shaft 24 at 0 o'clock when the transition from the second group to the third group is 360'Lβ+2α, and the process is repeated in the same manner. The steel strip 1 cut by the cutting blade 19 is moved by a guide 22, 22 having a gap equal to the thickness of the plate, which moves together with the slide pace 17 to prevent the cut portions from overlapping.
The belt 15 and the roller 13b are drawn between the two.

The steel strip 1 on the hoop material side is fed between the drive belt 15 and the roller 13b by the roller Y3aVC having the same circumferential speed as the drive belt 15 without changing the gap at the cutting part. When the winding shaft 24 makes one revolution, the completion signal drives the motor 29 for one revolution, and the feed screw 26 is driven through the transmission 28.
At zero rotation, the winding shaft 24 is lowered by a length corresponding to the plate thickness of the steel sheet 1. Further, the rotation of the transmission 29 is transmitted to the transmission 42 via the connecting shaft 43, and the elastic roller 38 is moved upward by the feed screw 40 at a certain rate depending on the position of the winding shaft 24 to reduce the deflection δ. Therefore, the bending radius when bending the steel strip 1 also increases gradually as the winding diameter of the winding die 23 increases, and the fit of the cut steel strip 1 to the winding die is improved.

〔Effect of the invention〕

As explained above, according to the wound core manufacturing apparatus of the present invention,
Automation of a series of processes for positioning and cutting the cut length of the copper strip drawn out from the hoop material when manufacturing the wound core, bending and forming the cut copper strip, and assembling the bent copper strips by stacking them in the order of their diameters. All of this is done mechanically, which has the effect of increasing the productivity of the wound core.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a wound core, FIG. 2 is a perspective view showing conventional manufacturing of a wound core, FIG. 3 is a perspective view showing one group of wound cores, and FIG. 4 is a perspective view showing manufacturing of a wound core of the present invention. A schematic configuration diagram showing one embodiment of the device, and FIG. 5 is an explanatory diagram of the operation of the device. 1... Steel strip, 13h, 13b... Roller, 15...
・Drive belt, 16... Feed screw, 17... Slide pace, 18... Cylinder, 19... Cutting blade, 2
0... Ser is a motor, 21... Position detector, 23...
... Winding die, 24... Winding shaft, 25... Position detector, 26... Feed screw, 30... Motor, 30...
- Drive roller, 35... Ser is a motor, 40... Feed screw, 44... Control device. Applicant's representative Patent attorney Takehiko Suzue 1 illustration, 2 illustrations

Claims (1)

[Claims] In an apparatus for manufacturing an iron core in which a wound copper strip is cut by shifting the cutting position in the circumferential direction for each winding, the copper strip fed out from a hoop material is cut into a predetermined length after each winding of the iron core. and a cutting mechanism equipped with a cutting blade that moves according to the deviation of the cutting position for each winding of the steel strip, and winding the steel strip cut by the cutting mechanism for each winding of the iron core. a winding mechanism that includes a winding die that is moved up and down according to the diameter of the copper strip winding machine, and a belt that conveys the cut steel strip and rotates the winding die so as to sequentially wind the steel strip; , a pair of rollers provided between the cutting mechanism and the winding mechanism for plastically deforming the cut steel strip into a circular shape according to the winding diameter of the winding die; A wound iron core manufacturing apparatus comprising a forming roller mechanism that moves up and down according to the winding diameter of the steel strip of the winding die.