JP3232285B2 - Transformer winding cutting method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cutting and removing a winding such as a copper wire in a transformer such as a pole transformer.

[0002]

2. Description of the Related Art Transformers such as pole transformers are constructed by accommodating an iron core made of a silicon steel plate and windings wound around the iron core in a case together with insulating oil. For those using PCB (polychlorinated biphenyl) -containing oil as the insulating oil, it is necessary to dismantle the oil promptly. To dismantle the transformer, the windings are first cut and then the cut windings are removed from the iron core by extrusion or extraction. What should be considered when dismantling, especially when cutting the winding, is that the temperature at the time of cutting does not exceed the vaporization temperature of the PCB of 200 ° C., and that it penetrates into the gaps between the steel plates constituting the iron core in the subsequent cleaning process. That there is no crushing of the side of the iron core that makes it difficult to remove the PCB-containing oil, and fine particles that can float in the cleaning liquid in the subsequent cleaning process and adhere to the liquid tank wall surface or cause clogging of the pipeline. Not generating any swarf. As a method of cutting the winding, a method using gas cutting, a method using a high-speed grindstone, and a method using a disk saw or a hand saw are most common.

[0003]

When the winding is cut using a gas cutter or a high-speed grindstone, the temperature of the winding becomes high and may exceed the vaporization temperature of 200 ° C. of the PCB. In addition, when cutting with a disk saw or a hand saw, the side surface of the iron core formed of a coil-shaped silicon steel sheet is likely to be crushed, and such crushing cleans the PCB-containing oil from the gap between the silicon steel sheets. The efficiency of the removal by Further, it is practically impossible to avoid the generation of fine chips by cutting with a disk saw or a hand saw.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and provides a method capable of suppressing an increase in temperature at the time of cutting, and preventing occurrence of side crushing and generation of fine chips. With the goal.

[0005]

SUMMARY OF THE INVENTION A method of removing a winding from a core of a transformer according to the present invention is to move a shearing blade along a side surface of the core and to push out the winding wound on the core. It is characterized by cutting and separating the core and the winding.

According to the present invention, the winding is cut by pushing with a shearing blade. Therefore, there is almost no heat generation at the time of cutting, and the PCB in the insulating oil impregnated in the windings
There is no danger of evaporation. In addition, since the winding is pushed and cut off, it is possible to prevent the iron core side surface from being crushed which may occur when cutting with a disk saw, a hand saw, or the like, and to avoid the generation of fine chips accompanying the cutting of the winding.

[0007] The shearing blade may be arranged so as to move along only one side of the iron core, and the pushing of the winding by the shearing blade may be performed only on one side of the iron core. In this case, there is an advantage that consumption of the shearing blade is reduced. Another advantage is that the setting of the shearing blade is easy.

[0008] The shearing blade is arranged to move along each of both opposing side surfaces of the iron core, the movement of the shearing blade is performed simultaneously on the both side surfaces, and the pushing of the winding by the shearing blade is performed on both sides of the iron core. It can be done at the same time. In this case, since the turning moment due to the pushing blade is canceled, there is an advantage that the design of the jig for the press becomes easy.

[0009] Removal of the remaining windings after cutting and separation of the windings can be efficiently carried out by the push-down claws.

[0010] The push-down claw can also have a function of suppressing lifting when the winding is cut and separated by the shearing blade.

After removing the remaining windings after cutting and separating the windings, the core-impregnated oil can be squeezed and removed by deforming the iron core in at least one direction from both sides thereof. The pressing of the iron core for the removal of the impregnating oil is performed in two intersecting directions, whereby a more complete removal of the impregnating oil is achieved.

According to the present invention, there is provided an apparatus for cutting and separating a winding from a core of a transformer, comprising: a core support for supporting the core;
A shear blade for cutting the winding wound on the iron core, and cutting the winding by push-cutting, on the side of the iron core supported by the iron core support, the shear blade separating the iron core and the winding. Shear blade moving means for moving the blade along the blade. According to the present invention, the winding is cut by pushing with a shearing blade, and the same effect as that of the invention according to the above method can be obtained.

[0013] Preferably, the shearing blade has a relief portion on a surface facing the side surface of the iron core. Thereby, even contact of the blade with the side surface of the iron core can be ensured, and blindness can be prevented.

By disposing the iron core pressure plate facing the shearing blade with the iron core supported by the iron core support interposed therebetween, it is possible to reliably receive the reaction force during the cutting of the iron core.

By disposing the band cutting blade on the iron core pressure receiving plate, it is possible to efficiently remove the band for preventing the core from loosening.

[0016] Preferably, in order to remove the remaining winding after the winding is cut by the shearing blade, a drop-down claw is disposed above the iron core cradle so as to be able to move up and down freely. The remaining winding is dropped by the push-down claw, and the use of a chute or the like allows efficient collection thereof.

By providing a drop-down claw width adjusting means for adjusting the width of the drop-down claw and an iron core receiving width adjusting means for adjusting the width of the iron core receiving stand, the optimum adjustment according to the specifications of the transformer is provided. Is realized.

Preferably, the edge of the shearing blade is tapered so that the center is concave. Thereby, the winding is prevented from expanding outward during cutting, and an independent winding expansion preventing plate can be omitted.

According to the present invention, there is provided an apparatus for cutting and separating a winding from an iron core of a transformer, comprising: an iron core support for supporting the iron core; and a shearing blade for cutting the winding wound on the iron core. And a shear blade moving means for moving the shear blade along the side surface of the iron core supported by the iron core cradle so as to separate the core from the winding by pressing and cutting the winding, and winding by the shear blade. After the wire is removed, the iron core is deformed from both sides in at least one direction to squeeze and remove the oil impregnated with the iron core.

[0020] Preferably, the core crushing member is configured as a core crushing piece which can be selectively cooperated with the iron core in order to squeeze and remove the core impregnating oil. By linking the shear blade moving means for moving the shear blade for cutting and separating the winding with the iron core crushing piece, it becomes possible to share the moving means such as the hydraulic cylinder device.

[0021] Preferably, there is provided rotating means for rotating the iron core cradle about the upright axis between at least two positions. By rotating the iron core cradle between the two positions by the rotating means, the impregnating oil is removed by squeezing in two intersecting directions, and efficient squeezing of the impregnating oil is realized.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 10 denotes an iron core of a transformer, and reference numeral 12 denotes a winding. The iron core 10 is formed by winding a silicon steel plate into a rectangular coil shape. This transformer is a so-called inner iron type in which two windings 12 are wound around one iron core 10.

A feature of the method for cutting a winding according to the present invention is that the cutting of the winding 12 is performed by pushing and cutting with a shearing blade. That is, the shearing blade is moved along the side surface of the iron core 10, that is, along the plane orthogonal to the paper surface of FIG.
As a result, the winding 12 is cut by pressing in the direction perpendicular to the paper along the cutting line L. As a result, the winding 12 remains on the iron core 10 as shown in FIG. There are various methods for removing the residual winding,
In the illustrated example, the removal of the residual winding 12 from the iron core 10 is easily performed by the pushing action of the push-down tool 14 by the three claws 14-1.

FIG. 2 is a perspective view of a press device embodying the principle shown in FIG. 1, and shows a state where a work is prepared in the press device. 1, 10 is an iron core and 12 is a winding. 15 is a band. Hereinafter, the apparatus of FIG. 2 will be described in detail. The tip of a piston rod 16 of a pressure cylinder (not shown) is fixed to a piston head 18 which is a main part of the press apparatus. Piston head 1
8, the shear blade holder 20 is fixed,
The shear blade 22 is fixed to zero. Therefore, by controlling the supply of the hydraulic pressure to the pressurizing cylinder, the shear blade holder 20, which is fixed to the tip of the piston rod 16, in other words, the shear blade 22 can linearly move forward and backward in the direction of the arrow a in the figure. . Shear blade 22 has a tapered surface at the tip
22-1.

A pair of iron core pedestals 26 are provided on the base 24 at intervals. A pair of support plates 28 are fixed to the upper end of the iron core cradle 26 in parallel and spaced apart therefrom. Iron core 10
Are mounted on an iron core cradle 26, while the windings 12 are arranged so that they can fall by their own weight by dropping through gaps between the iron core cradle 26.

A winding spread prevention plate 30 is fixed on both support plates 28, and the winding spread prevention plate 30 is in contact with each winding 12 on the inner surface facing each other.

The winding receiving plate 32 is fixedly arranged on the winding expansion preventing plate 30 on the side opposite to the shear blade 22. The winding receiving plate 32 functions as a stopper that receives a force of about の in the shear direction applied to the winding 12 when the winding blade 12 is pushed off by the shearing blade 22.

An iron core pressure receiving plate 34 is also arranged on the opposite side of the shearing blade 22 across the work. The iron core pressure receiving plate 34 is fixed to the upright portion 24-1 at the end of the base 24. A band cutting blade 36 is disposed on the iron core pressure receiving plate 34 in a direction perpendicular to the band 15 so as to be fixed or protrude and retract. A cylinder device 38 is disposed in the upright portion 24-1 of the base 24 to cause the band cutting blade 36 to protrude and retract in the horizontal direction. The tip of the piston rod 38-1 is connected to the band cutting blade 36.

The push-down tool 14 also shown in FIG. 1 is arranged above the base 24 and is connected to a piston rod of a cylinder device (not shown). It is capable of linearly reciprocating in the vertical direction b.

Next, the respective steps for cutting the winding will be described. The height of the iron core support 26 and the width and height of the winding expansion preventing plate 30 according to the size of the transformer as a work are described. Is adjusted, then the work is loaded, and the work is set at a predetermined position.

The supply of hydraulic pressure to the pressurizing cylinder
Is made to advance toward the work. As a result, as shown in FIG. 3, the shear blade 22 moves along the side surface of the iron core 10, the tip of the shear blade 22 bites into the winding 12, and the winding is cut by the shearing-off method using the shear blade. At the time of pushing off, the iron core 10 is wound with the winding 32
Accordingly, the iron core 10 is supported by the iron core pressure receiving plate 34 so as not to retreat from the position. In addition, the winding expansion preventing plate 30 prevents the winding 12 from expanding outward as indicated by an arrow c.

At the time of pushing off, the shearing blade 22 is
Is assumed to be F, the cutting edge of the shearing blade 22 has a tapered shape, and as shown in FIG. 3, the cut winding escapes upward by the component force of F1, while the iron core is F2. Attempts to escape downward by force. The lower escape is iron core support 26
Received by Since the escape portion 22-1 is formed on the back surface of the cutting edge located along the side surface of the iron core, it is possible to prevent the blade from locally digging into the side surface of the iron core. Since the shearing blade 22 makes a reasonable contact with the side surface of the iron core, the core 1
Forces applied to zero are distributed. As described above, since a large force is not locally applied to the side surface of the iron core 10 than the cutting edge, there is no possibility that the side surface of the iron core is crushed. Here, “blindness” refers to a state in which the gap between the steel plates constituting the iron core is filled by partially crushing the steel plate constituting the iron core on the side surface. If the crushing occurs, it becomes difficult to remove the PCB-containing oil remaining between the steel plates constituting the iron core by washing. However, the present invention also solves the crushing problem.

In the above description, since the moving speed of the shearing blade 22 is as low as, for example, about several tens of mm / sec, the temperature rise at the cut portion is insignificant, and the temperature at the cut portion of the winding becomes PC
It is possible to prevent the temperature from exceeding 200 ° C., which is the evaporation temperature of B. In addition, the cutting by the push-off method can reduce the fine chips generated by the cutting to several tenths, if not completely zero, compared to those using a disk saw or a band saw, Problems such as floating of chips in the washing liquid after washing after cutting can be solved.

When the winding is completely cut in this way, the direction of supplying the hydraulic pressure to the pressurizing cylinder is switched.
The shear blade 22 is retracted.

On the other hand, the cylinder 3 for cutting the band 15
8 is supplied with hydraulic pressure, the band cutting blade 34 is advanced, and the band 15 is cut. After the band cutting is completed, the hydraulic pressure supply direction to the cylinder 38 is reversed, and the band cutting blade 34 is retracted. This step may be performed before the retraction of the shear blade in some cases.

Thereafter, the push-down tool 14 is lowered by supplying hydraulic pressure to a cylinder (not shown), and as described above with reference to FIG.
2 is pushed downward by the claw 14-1. As a result, the remaining portion of the winding detached from the iron core is dropped into the space S between the iron core receiving pedestals 26, and the remaining winding is recovered by a collecting means such as a chute (not shown).

After the remaining portion of the winding has been dropped, the drop-off device 14
Is raised to the standby position shown in FIG. 2, and the next work is loaded on the iron core cradle 26.

In the above embodiment, it is easy to continuously cut the winding 12 and the band 15 and remove the residual of the winding 12 from the loading of the work. The productivity can be increased in comparison. Although the above is an example of a shell-type transformer, the idea of the present invention can also be realized with a so-called shell-type in which one winding is provided across two cores 10 as shown in FIG. It is. As in FIG. 1 (a), cutting is performed along the side surface of the iron core, that is, along the cutting line L in a direction perpendicular to the paper surface by a push-off method using a shearing blade. After cutting, the remaining winding is extruded and dropped by the winding push-down tool 14 having two claws 14-1 from one side of the iron core. The iron core 10 is taken out with the band 15 cut.

Although the above description has been made on the case where the winding is cut only on one side, the winding can be cut on both sides simultaneously. This example will be described with reference to FIGS. 5 and 6. In these figures, one half shows the state of the apparatus before cutting the winding, and the other half shows the state of the apparatus during cutting of the winding. In this embodiment, the shear blade is moved in the vertical direction, which is different from the first embodiment in which the movement of the shear blade is performed in the horizontal direction.

The second embodiment will be described.
The work is placed on a support table 100 having a winding spread prevention plate 100-1 standing at both ends. The work mounting structure will be described. A pair of winding receivers 102 are provided apart from each other, the lower end of the iron core 10 is positioned between the winding receivers 102, and stands upright on the support table 100 via a liner 104. Supported. The winding expansion preventing plate 100-1 of the support base 100 functions as a stopper for preventing escape due to expansion when the winding is cut. On the other hand, a pair of shearing blades 108 are provided on the lower surface of the pressurizing plate 106. 110 is a holder for the shear blade 108. As shown in FIG.
A pair of shear blades 108 are arranged parallel to and separated from each other across the width of the iron core 10, and each shear blade 108 extends in the width direction so as to be parallel to the side surface of the iron core 10. for that reason,
When the shear blade 108 descends, the shear blade 108 is moved along the side surface of the iron core 10, and the cutting of the winding 12 is performed simultaneously on both sides. As in the description of FIG. 3 in the first embodiment, the shearing blade 108 forms a flank 108-1 on the back surface of the cutting edge to prevent local contact of the cutting edge with the side surface of the iron core 10 at the time of cutting. To prevent blinding.

In the above-described first embodiment, the shearing blades 108 are simultaneously lowered along both sides of the iron core, and the cutting of the winding 12 by the push cutting is performed simultaneously on both sides. At the time of cutting by pushing and cutting the windings, outward and inward component forces as shown by F1 and F2 in FIG. 3 are generated in the respective shearing blades 108 based on the tapered shape of the cutting edge. Inward force F2 is iron core 1
0, the outward force F1 is applied to the press pressure plate 106 as an eccentric load. However, in this embodiment, since the push cutting is performed simultaneously on both sides of the iron core, the turning moment by the pushing blade is canceled. Therefore, there is an advantage that the design of the press press board 106 becomes easy.

In the above embodiment, the cutting edge of the shearing blade does not necessarily have to form a straight line in the pressing and cutting direction, but may be provided with a shear angle and an inclined mountain shape.

In the above embodiment, the removal of the windings remaining on the iron core after the cutting of the windings is performed by extrusion. However, the present invention is not limited to this. It may be.

Next, another embodiment of the method of the present invention will be described with reference to FIGS. 7 and 8 (a) to (f). This embodiment is characterized in that the work is prevented from rising when the winding is cut by the push-down claw, and the core is impregnated with oil by pressing the core in the X and Y directions by a deformed piece after the winding is cut. is there. According to this embodiment, the winding is cut in the order of the following steps 1 to 16.

Step 1 The work is set on the iron core cradle 150 manually.
At this time, the shear blade 152 is retracted, and the deformed piece 15
4 is at the lowered position, and the pressure receiving plate 158 is at the retracted position.

Step 2 The push-down claw 160 is lowered toward the winding 12 (arrow a), and the iron core 10 is pressed against the iron core cradle 150 to prevent the core from rising at the start of the push-off.

Step 3 The piston head 159 and the shear blade 152 are advanced (arrow b), and the cutting of the winding is started.

Step 4 When the cutting of the winding is started, the push-down claw 160 is raised to the standby position (arrow c).

Step 5 During the push-off operation, the pressure receiving plate 158 is advanced (arrow d), and the push-off reaction force is received by the pressure receiving plate 158. The band 15 is cut by the band cutting blade 162.

Step 6 When the push-off operation is completed, the piston head 159 and the shear blade 152 are retracted (arrow e).

Step 7 The push-down claw 160 is lowered (arrow f), and the winding 12 remaining on the iron core is pushed down. Further, the deformation piece 154 is raised to a position where it can engage with the piston head 159 (arrow g).

Step 8 The push-down claw 160 is raised to the standby position in preparation for the next work (arrow h).

Step 9 The piston head 159 moves forward (arrow i), and the iron core 10 moves in one direction (X) between the pressure receiving plate 158 and the deformation piece 154.
Direction). Therefore, the oil contained in the iron core is squeezed.

Step 10 The piston head 159 and the deformed piece retreat (arrow j).

Step 11 The pressure receiving plate 158 and the band cutting blade 162 are retracted (arrow k). Step 12 The swivel table 170 on which the iron core cradle 150 is mounted is rotated 90 degrees (arrow l).

Step 13 The pressure receiving plate 158 and the band cutting blade 162 move forward (arrow m).

Step 14 The piston head 159 and the deformation piece 154 are advanced again (arrow n), and the iron core 10 is pressed between the pressure receiving plate 158 and the deformation piece 154 in the second direction (Y direction).

Step 15 The pressure receiving plate 158 and the piston head 159 are retracted.

The deformed piece 154 descends (arrow o), and the swivel table 170 reverses by 90 degrees (arrow p).

Hereinafter, a specific embodiment of a winding cutting device for realizing the method described with reference to FIGS. 7 and 8 will be described with reference to FIGS. As shown in FIG. 10, the transformer is a pair of iron cores 1.
It is a shell type in which the winding 12 is wound between 0. As shown in FIG. 9, a pressurizing cylinder 202 for winding cutting and iron core crushing is fixed to a frame 200 of the apparatus, and a piston rod 203 which is moved in a horizontal direction is attached to a piston head 20.
4 is fixed. A shear blade 208 is attached to a holder 206 integrated with the piston head 204. As shown in FIG. 10, a pair of parallel guide pistons 209 extend from the piston head 204 in parallel with the piston rod axis, and the guide piston 209 is slidable on an auxiliary guide cylinder 210 attached to the pressurizing cylinder 202. Has been guided to. Therefore, when the piston rod 203 moves forward or backward by the hydraulic pressure applied to the pressurizing cylinder 202, the piston head 204 moves forward or backward while maintaining its horizontal position. As shown in FIG. 10, the cutting edge 208a of the shearing blade 208 is tapered in the retreating direction from both sides toward the center. That is, the cutting edge 208a of the shear blade 208 has a V-shaped concave shape in the retreating direction. The tapered portion moves the winding toward the center in the process of pushing and cutting the winding, in other words, prevents the winding from escaping outward during cutting (see FIG. 12). Therefore, the winding spread prevention plate 30 in the embodiment of FIG. 2 can be omitted.

Pressing cylinder 2 for winding cutting and core crushing
Another pressurizing cylinder 211 for receiving a reaction force at the time of winding cutting and centering at the time of crushing of the iron core is arranged at a position facing the horizontal plane with the second cylinder 02. Pressurizing cylinder 21
The piston head 21 is attached to the tip of one piston rod 212.
3 is provided, and an iron core pressure receiving plate 214 is provided on the front surface of the piston head 213. As shown in FIG. 10, a pair of parallel guide pistons 21 are
5 extends parallel to the axis of the piston rod, and the guide piston 215 is slidably guided by an auxiliary guide cylinder 216 attached to the pressurizing cylinder 211.
Therefore, when the piston rod 212 moves forward or backward by the hydraulic pressure applied to the pressurizing cylinder 211, the piston head 213 is moved forward or backward while maintaining its posture horizontally. As in the first embodiment shown in FIG. 2, a band cutting blade 217 is provided on the pressure receiving plate 214.

A pair of iron core supports 218 on which the iron core 10 is mounted are spaced apart in parallel with the direction in which the shear blade 208 cuts the windings. The iron core pedestal 218 is provided so as to stand upright from the base 220, and is slidably provided on the base 220 in parallel to the shearing direction of the winding. Further, the spacing adjusting screw 222 is screwed to the iron core cradle 218, the direction of the thread of the spacing adjusting screw 222 screwed with the right core cradle 218 in FIG. The direction of the thread of the matching interval adjusting screw 222 is opposite.
Accordingly, the rotation of the gap adjusting screw 222 causes the right and left iron core supports 218 to move closer or away from each other depending on the rotation direction, and the distance between the right and left iron core supports 218 is changed. I have. Spacing adjustment screw 222
In order to induce such a rotational movement, one end of the spacing adjusting screw 222 is connected to a rotating drive shaft of the geared motor 224. In other words, the rotation of the rotary drive shaft of the geared motor 224 causes the iron core cradle 218 to slide on the base 220 in parallel to the winding cutting direction, so that the interval between the iron core cradle 218 is adjusted to the width of the winding 12 to be cut. It is possible to set an optimum interval according to the setting.

A base 220 for the iron core receiving base 218 is fixed to the upper end of the winding cutting height adjusting cylinder 226, and the cylinder 226 is fitted to a column 228 that stands upright from the bottom of the frame 200. When hydraulic pressure is introduced into the cylinder 226, the cylinder 226 is raised with respect to the column 228, and the iron core pedestal 218 fixed to the base 220.
Can be raised to obtain the optimal height position of the iron core 10 placed on the iron core cradle 218.

According to this embodiment, the iron core 10 from which the windings 12 have been removed is turned by 90 degrees around the vertical axis so that the impregnating oil can be efficiently squeezed out by crushing the iron core in the cross direction. , A rotation mechanism is provided. That is,
The cylinder 226 has a toothed portion 2
A gear 234 is provided on a shaft 232, which is mounted on the frame 200, while the gear 234 meshes with a tooth 230 of the cylinder 226. The tooth portion 230 of the cylinder 226 has such a tooth length that the meshing with the gear 234 is maintained in the range of elevation of the cylinder 226 for adjusting the optimum height position of the iron core 10. A sprocket 236 is provided on the shaft 232,
The sprocket 236 is connected by a chain 238 to a sprocket 242 on a rotating shaft of a geared motor 240 for position adjustment when the core is crushed. Geared motor 24
The rotation of 0 is transmitted to the cylinder 226 via the sprocket 242, the chain 238, the sprocket 236, the gear 234, and the teeth 230.

Above the iron core pedestal 218, the remaining winding push-down cylinder 244 is fixed to the frame 200. A piston head 248 is provided at a lower end of the piston rod 246 of the cylinder 244. Two rods 249 extending in parallel from the piston head 248 are slidably accommodated in corresponding guides fixed to the frame 200, and the piston head 248 is supported so as to be able to reciprocate vertically while maintaining its position. I have. On the lower surface of the piston head 248, a pair of push-down claws 250 are arranged so as to be slidable in a direction perpendicular to the cutting direction of the winding. As shown in FIG.
The spacing adjusting screw 252 is screwed into the push-down claw 250,
In FIG. 11, the direction of the thread of the interval adjusting screw 252 screwed with the right drop-down claw 250 is opposite to the direction of the thread of the interval adjusting screw 252 screwed with the left drop-down claw 250. . Accordingly, the right and left push-down claws 250 move in the direction of approaching or separating by the rotation of the gap adjusting screw 252, and the gap between the right and left push-down claws 250 is changed. In order to cause such a rotational movement of the gap adjusting screw 252, one end of the gap adjusting screw 252 is connected to a rotation drive shaft of the geared motor 254.
That is, due to the rotation of the rotation drive shaft of the geared motor 254, the push-down claw 250 slides in a direction orthogonal to the winding cutting direction, and the interval between the push-down claw 250 corresponds to the interval between the remaining windings to be dropped. It is possible to set the optimum interval.

The holder section 206 of the main piston head 204
An iron core crushing piece 256 is arranged below. Further, a guide bar 257 is provided on the lower surface of the holder portion 206 so as to project laterally. Guide bar 257 is iron core crush piece 25
6. A dovetail groove formed in the direction perpendicular to the cutting direction of the iron core
256-1 is engaged. Therefore, the iron core crushing piece 256 is movable in a horizontal plane in a direction orthogonal to the winding cutting direction. An iron core crushing piece retreat cylinder 260 is fixed to the main piston head 204, and one end of a piston rod 262 of the cylinder 260 is connected to an iron core crushing piece 256 via a bracket 264. When the piston rod 262 contracts, the iron core crushing piece 256 is at the winding crushing position 256A shown by a solid line. At the coil crushing position 256A, the core crushing piece 256 comes into contact with the core 10 before the shear blade 208 engages with the coil 12 due to the extension of the piston rod 203, and the core is crushed. When hydraulic pressure is supplied to the cylinder 260, the piston rod 262 is extended, and the iron core crushing piece 256 comes to the winding shear position 256B of the imaginary line. At the winding shear position 256B, the iron core crushing piece 256 moves the iron core 10 in the entire stroke range of the piston rod 203.
And the winding 10 by the shear blade 208
Is cut.

The oil receiving gutter 26 extends along the bottom of the frame 200.
The impregnating oil 6 squeezed from the iron core by crushing the iron core is received by the oil receiving gutter 266.

The operation of the embodiment shown in FIGS. 9 to 11 will be described. The work is set on the iron core cradle 218 manually. At this time, the shear blade 256 is retracted, the deformed piece 256 is at the winding shear position 256B, and the pressure receiving plate 214 is at the retracted position.

By supplying hydraulic pressure to the cylinder 244, the push-down claw 252 is lowered toward the winding 12, and
Numeral 0 is pressed against the iron core cradle 218 to prevent lifting at the start of pushing and cutting.

When hydraulic pressure is supplied to the cylinder 202, the shear blade 208 is advanced, the shear blade 208 is engaged with the winding 12, and the cutting of the winding 12 is started. The hydraulic pressure is supplied to the pressurizing cylinder 211, the pressure receiving plate 214 is advanced,
The push-off reaction force is received by the pressure receiving plate 214.

When the cutting of the winding 12 by the shear blade 08 is started, the direction of the hydraulic pressure to the cylinder 244 is switched, and the push-down claw 250 is raised to the standby position shown in FIG.

At the time of pushing and cutting, the band is cut by the band cutting blade 217.

When the push-off operation is completed, the direction of introducing the hydraulic pressure to the cylinder 202 is switched, and the piston head 204
And the shear blade 208 retreats.

Again, the direction of introducing the hydraulic pressure to the cylinder 244 is switched, and the push-down claw 250 descends, whereby the winding 12 remaining on the iron core is pushed down. Further, the direction in which the hydraulic pressure is introduced into the cylinder 260 is switched, and the deformed piece 256 that has been retracted to the winding shear position 256B is advanced to the solid core crushing position 256A indicated by the solid line in FIG. I come to.

After the residual winding 12 has been pushed down, the cylinder 2
The oil pressure to 44 is switched, and the push-down claw 250 is raised to the standby position in preparation for the next work.

The hydraulic pressure is supplied to the pressurizing cylinders 202 and 210,
The piston heads 204 and 213 are respectively advanced toward the iron core 10, and the iron core 10 is crushed in one direction (X direction) between the pressure receiving plate 214 and the deformation piece 256. Therefore, the oil contained in the iron core is squeezed.

After the crushing in the X direction is completed, the cylinder 20
2, 210, the hydraulic pressure introduction direction is switched, and the deformed piece 256 and the pressure receiving plate 214 are retracted.

The motor 240 is rotated, and its rotational movement is controlled by the sprocket 242, the chain 238, the sprocket 2
The power is transmitted to the cylinder 226 via the gears 232 and 230, and the base 220 is rotated 90 degrees.

Again, the direction of hydraulic pressure introduction of the cylinders 202 and 210 is switched, the deformed piece 256 and the pressure receiving plate 214 are advanced again, and the iron core 10 is moved between the pressure receiving plate 214 and the deformed piece 256 in the second direction (Y direction). ).

The impregnated oil squeezed out by the crushing in two directions is collected by the oil receiving trough 266.

After the core is pressed and the impregnated oil is squeezed out, the work is taken out, and in the next work, the core is pressed and the impregnated oil is squeezed out.

[0082]

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are schematic views illustrating a method of cutting a winding and a method of treating a remaining winding after cutting of a core type according to the present invention.

FIG. 2 is a schematic perspective view illustrating a configuration of a first embodiment of the present invention in which winding is cut off on only one side.

FIG. 3 is a view for explaining a force generated on a shearing blade during press-cutting of a winding in FIG. 2;

FIGS. 4 (a) and 4 (b) are schematic diagrams illustrating a method of cutting a winding according to the present invention and a method of processing a remaining winding after cutting of a shell type.

FIG. 5 is a view for explaining a second embodiment of the present invention in which the cutting of the winding by push cutting is performed simultaneously on both sides of the iron core, and the right half shows a state where the pushing cutting blade is at a standby position;
The left half shows a state where the cutting blade is cutting the winding.

FIG. 6 is a side view of the apparatus of FIG. 5, in which the left half shows a state where a shearing blade is at a standby position, and the right half shows a state where the shearing blade cuts a winding.

FIG. 7 is a diagram illustrating a series of operations in another embodiment in which impregnating oil is squeezed out after winding is cut.

FIG. 8 is similar to FIG. 7, but illustrates subsequent operations.

FIG. 9 is a front view of a specific device for realizing the method of FIGS. 7 and 8;

FIG. 10 is a plan view of the device of FIG. 9;

FIG. 11 is a side view of the device of FIG. 9;

FIG. 12 is a diagram showing a relative positional relationship between a shearing blade having a concave portion and an iron core.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Iron core 12 ... Winding 14 (160, 250) ... Drop-off tool 16 (202) ... Pressurizing cylinder 22 (108, 152, 208) ... Shearing blade 26 (150, 218) ... Iron core cradle 30 ... Winding Spread prevention plate 34 (158, 214) ... iron core pressure receiving plate 154 (256) ... iron core crush piece

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H01F 41/00 B23D 25/14 B09B 5/00 H01F 27/00

Claims (18)

(57) [Claims] 1. A method of cutting and separating a winding from a core of a transformer, comprising: moving a shear blade along a side surface of the core;
Cut the winding wound on the iron core by pushing and cutting,
A method for cutting a winding of a transformer, comprising separating an iron core from a winding. 2. The invention according to claim 1, wherein the shear blade is disposed so as to move along only one side surface of the iron core, and the cutting of the winding by the shear blade is performed only on one side of the iron core. Features winding transformer cutting method. 3. The invention according to claim 1, wherein the shearing blade is arranged to move along each of both opposing side surfaces of the iron core, and the movement of the shearing blade is performed simultaneously on the both side surfaces. A method of cutting a winding of a transformer, wherein the cutting of the winding by a blade is performed simultaneously on both sides of the iron core. 4. The method according to claim 1, wherein the removal of the remaining windings after the cutting and separation of the windings is performed by using a drop-down claw. 5. The method according to claim 4, wherein when the winding is cut and separated by a shearing blade, the winding is suppressed by a push-down claw. 6. The invention according to claim 1, wherein after removing the remaining windings after cutting and separating the windings, the core is deformed from both sides thereof in at least one direction,
A method for cutting windings of a transformer, comprising squeezing and removing iron core impregnating oil. 7. The method according to claim 6, wherein the impregnating oil is removed by pressing the iron core in two intersecting directions. 8. An apparatus for cutting and separating a winding from an iron core of a transformer, comprising: an iron core support for supporting the iron core; a shearing blade for cutting the winding wound on the iron core; And a shear blade moving means for moving the shear blade separating the core and the winding along the side surface of the iron core supported by the iron core cradle. Winding cutting device. 9. The winding cutting device for a transformer according to claim 8, wherein the shearing blade has a relief portion on a surface facing the side surface of the iron core. 10. The transformer according to claim 8, further comprising an iron core pressure plate disposed opposite to the shear blade with the iron core supported by the iron core cradle interposed therebetween. Winding cutting device. 11. The transformer winding cutting device according to claim 10, further comprising a band cutting blade disposed on the iron core pressure receiving plate. 12. The invention according to claim 8, further comprising a push-down claw arranged to be able to move up and down above the iron core support so as to remove the remaining winding after the winding is cut by the shearing blade. A winding cutting device for a transformer. 13. A winding cutting device for a transformer according to claim 12, further comprising a drop-down claw width adjusting means for adjusting a width of the drop-down claw. 14. The winding cutting device for a transformer according to claim 8, further comprising an iron core pedestal width adjusting means for adjusting the width of the iron core pedestal. 15. The winding cutting device for a transformer according to claim 8, wherein the edge of the shearing blade is tapered so that the center is depressed. 16. An apparatus for cutting and separating a winding from an iron core of a transformer, comprising: an iron core support for supporting the iron core; a shearing blade for cutting the winding wound on the iron core; A cutting blade, and a shearing blade moving means for moving the shearing blade along the side surface of the iron core supported by the iron core cradle so as to separate the iron core and the winding, after removing the winding by the shearing blade. A winding cutting device for a transformer, comprising a core crushing member for deforming the core from both sides thereof in at least one direction to squeeze and remove the core impregnating oil. 17. The invention according to claim 16, wherein the core crushing member is configured as a core crushing piece selectively engageable with the iron core in order to squeeze and remove the core impregnating oil. Transformer winding cutting device. 18. The invention according to claim 16, further comprising rotating means for rotating the iron core pedestal at least between two positions about the upright axis, and removing the impregnated oil by pressing. A winding cutting device for a transformer, wherein the winding is performed in at least two directions intersecting at the two positions.