JPS592309A - Core pressing apparatus for manufacturing wound core - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an iron core in which a circular core formed by winding a copper strip having stepped cuts is deformed under pressure in the manufacturing process of a wound core, thereby reducing the necessity of forming stepped cuts in the core steel strip. It relates to a pressurizing device.

[Technical background of the invention]

For example, a one-turn cut type wound core 1 as shown in FIG. 1 is used in a power distribution transformer. This one-turn cut type wound core has a cut of 2a for each turn.
A plurality of silicon steel strips 2 (hereinafter referred to as copper strips) whose positions are shifted in the circumferential direction are wound together to form one set of I-ku belt group 3, and then multiple I5! It is assembled by stacking the copper strip groups in a circular manner on the outside of the circle.

Conventionally, as a method for manufacturing M band groups in this one-turn cut wound core, step 1 is performed by forming stepped cuts 4 as shown in FIG. 2 using a cutting device at each position of the copper band 2 to be cut; Next, the copper strip 2 is continuously wound up using a winding device to form a circular iron core (steel strip group), and then a radial pressing and bending force is repeatedly applied to the circular iron core using a core pressing device. Each turn's +! 62 stepped cuts 4
0 strength is weakened, and then force is applied to the circular iron core in the front and back, left and right, and up and down directions using a press device Vc to form it into a rectangle (at the same time, the tension acting on the steel strip 2 is applied to the steel strip 2 to form the stepped cut 4. There is a way to cut it to make a complete cut.

[Melting point of background technology]

As described above, the one-turn cut wound core has a configuration in which the cuts of a plurality of steel strips 2 in one copper strip group are staggered in the circumferential direction. For this reason, in the process of applying pushing and bending force to the circular core using a core pressurizing device to reduce the strength of the stepped cuts 4 of the steel strip 2, all 20 stepped cuts of the copper strip group 3 are 4
It is difficult to apply an even pushing and bending force to the steel strips, and in the same rope group of 3 circles, the steel strip 2 has a step cut of 40 and the strength is extremely weak, and the steel strip 2 has extremely low strength and is hardly affected by the pushing and bending force. Band 2 is generated. Then, when the press forming operation, which is a subsequent process, is completed, the stepped cut 4 may break as shown in FIG. For this reason, when combining the iron core with the transformer coil, the assembly work becomes difficult, and there are problems such as permanent running at the fractured part and uneven spacing, making it difficult to obtain good characteristics. be.

[Purpose of the invention]

The present invention provides an iron core pressurizing device for manufacturing a wound iron core, which can uniformly apply pushing and bending force to the valley steel strip of a circular iron core and pressurize it well.

[Concept of the invention]

The core pressurizing device of the present invention includes a mechanism for fixing a circular core;
A mechanism that presses and bends a circular iron core to apply a pressing and bending force, and a mechanism that moves this pressing and bending mechanism in the bending direction with respect to the pressing and bending direction. It consists of an I-structure and applies pushing and bending force to the entire core by moving the pushing and bending mechanism.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to drawings.

4 and 5 show one embodiment of the present invention, FIG. 1 is a perspective view showing a core pressurizing device, and FIG. 2 is an explanatory diagram showing a pressurizing operation.

In the figure, 6 is a base, 7t is a core holder that receives a circular core 5 horizontally installed on the base 6 via a fixture 8, is a roller, 9 is a core fixing body that is installed upright on the base 6, and 10 is a roller. This is a core fixing body that is supported facing the core fixing body 9 by screws 11 screwed horizontally into the core fixing body 9. The core fixing body 9 and the core fixing body IQ are core holders that sandwich the circular core 5 placed on the roller 7 on the inner and outer peripheral sides, and fix the core 5 by tightening the fixing screws 11. In the figure, 12 is a table supported by guide rails 18° 18, which will be described later, 13 is a hydraulic cylinder installed on the table 12, 14 is a slide plate connected to the piston rod 15 of the hydraulic cylinder 13 and slides on the table 12, and 16 Reference numeral 16 denotes a striped plate support provided on the table 12 to freely support the slide plate 14, and 17 and J7 are screwed onto the tip of the slide plate 14 in an upright position, and have a circular iron core. This is a support that applies pressing and bending force to the iron core 5 by sandwiching the iron core 5 from the inside and outside. The sliding direction of the cladding root 14 by the hydraulic cylinder 13, that is, the pressing and bending direction in which pressing and bending force is applied to the circular iron core 5 is parallel to the direction of the fixing screw 11, that is, the direction in which the core is fixed, and is parallel to the supporting column 17. A circular iron core 5 is supported at a position facing the 17fi iron core fixing body 9 and 10. In the figure, reference numerals 18 and 18 refer to a pair of idler bars 19 installed along a direction perpendicular to the core push-bending direction at locations spaced apart from each other in the core push-bend direction (the slide direction of the slide plate 14) on the base 6. .19 are movably provided on the guide rails 18 and 18, respectively, and the tables 12
Bearings 11, 21 were fixed to the lower surface of the base 6 and were placed between the 1-dove V knee and 20# guide rails 18 and 1110, parallel to the guide rails 18 and 18, and installed on the base 6.
A feed screw, 22#j, supported on the table 12, and a receiving screw, 23#j, attached to the bottom surface of the table 12 and screwed into the feed screw 20.
An electric motor is attached to the base 6 by Vc, 24 is a bevel gear attached to the shaft of the electric motor 23, and 25 is a bevel gear attached to the feed screw 20 and meshing with the bevel gear 24. The table 12 moves along the guide rails 1B and l1lf in a direction perpendicular to the direction of pushing and bending the iron core, thereby causing the hydraulic V cylinder 1
3 and the slide plate 14 also move in the same direction.

A case will be described in which the circular core 5 is pressed and bent using the core pressurizing device configured as described above.

In addition, the wound core has stepped cuts 4 at predetermined positions where the steel strip is to be cut.
It is formed by winding it into a circular shape. First, the circular iron core 5 is placed on the reinforcing bar support roller 7.

In this case, the round iron core 5 has the marked cut 4 of the pot 2 separated by the rose 1.
Pillar 17 of board 14. Arrange it so that it is located on the J7 side. Tighten the fixing screw 11 and firmly tighten and fix the opposite side of the stepped notch 40 of the circular core 5 with the core fixing bodies 9 and 10, and then clamp the stepped notch 4 portion of the circular core 5 with the struts 17 and 17. Insert it from the top so that it is visible, and screw it into the rose plate 14 to fix it. Next, the hydraulic cylinder 13f:ml is moved to move its piston rod 15 forward to advance the frame 1F plate 14, and the column 17 attached to the rose plate 14 is moved forward.
At step 17, pressure is applied to the copper band 2 of the circular iron core 5 to bend it.

At the same time as the rose plate 14 reaches the forward end, the piston rod 15 of the hydraulic cylinder 13 retreats and moves to the slide plate J4.
to retreat. This will result in support column 17?17 or circular iron core 5.
When the bar plate 14 is further retreated and the circular iron core 5 is stretched in an oval shape with low weight, it reaches the retreating end and the piston rod 15 of the hydraulic cylinder 13 stops. When the electric motor 23 rotates to rotate the feed screw 20 via the bevel gears 24.25, the table 12 moves along the 1F rail 18.18 via the receiving screw 22. The table 12 and the loose board 14 move in a direction perpendicular to the direction of pushing and bending the core, and the support columns 17 and 17 move in the same direction while sandwiching the whole area of the circular core 6. The table 12, that is, the columns 1'l and 17, is moved by one pitch of the feed screw 20 for one reciprocating movement of the piston rod 15 of the hydraulic cylinder 13, and the amount of movement # is equal to the stepped cut of the rope in the circular iron core 5. 4 (joint), and the range of movement is from near the beginning of each stepped cut 4 of copper band group 3 in circular core 51 to near the end. The period up to this point is one effect, and the support column 27°17 moves back and forth within that range. In this way, one reciprocating movement of the hydraulic cylinder 3 and one pitch movement of the feed screw 20 are defined as one circle,
Usually several 10 circles are repeated.

Therefore, each -band 2 in the copper band group 3 of the circular core 5
The pressing and bending force acts evenly on the stepped cuts 4, and the strength of each stepped cut 40 can be weakened evenly.

Note that the configuration of each mechanism in the apparatus of the present invention is not limited to the embodiment, and may be any configuration that performs a predetermined operation.

The core pressurizing device for this purpose performs the core pushing and bending operation while moving the mechanism for pushing and bending the circular core in a direction perpendicular to the core pushing and bending direction, that is, in the direction in which the copper strip cuts in the circular core are lined up. By applying pressing and bending force evenly to the cuts in the copper band, the strength of each of the cuts in the band can be uniformly weakened. Therefore, each stepped cut in the circular core can be easily and efficiently cut in a subsequent process, and good core characteristics can be ensured.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the wound core; Fig. 2 is a perspective view showing the stepped cut portion of the copper strip; Fig. 3 is a perspective view showing the broken state of the stepped cut portion; Fig. 4 is the device of the present invention. FIG. 5 is a perspective view showing one embodiment of the present invention, and FIG. 5 is an explanatory diagram showing the operation of the same apparatus. 1...Wound core, 2...-band, 3...Cable band group, 4...Stepped cut, 5...Circular core, 6...Base, 7...Rebar support Roller, 9, 10... Core fixing body, 11... Fixing screw, 12... Table, IJI
l/V cylinder, 14...Slide plate, 17...Strut, 18...Guide rail, 20...Feed screw, 23
...Electric IIm. Applicant's agent: Patent attorney Takehiko E Takehiko 0 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A mechanism for fixing a circular core formed by winding a copper strip with stepped cuts formed at each predetermined position, a push-bending mechanism for pressing and bending the circular core by applying force in its radial direction, and this push-bending mechanism An iron core pressurizing device for manufacturing C16-wound iron/9, comprising a moving mechanism for moving a circular iron core in a direction at a curved angle with respect to the pushing and bending direction.