JP2000106314A - Method and device for manufacturing wound core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent distortion of core blocks or disturbance of laminated surfaces at manufacturing of a wound core by laminating a plurality of core blocks composed of laminated bodies of steel sheets upon another in wound states. SOLUTION: A core block Bn, which is formed by successively laminating unit steel sheets upon a fixed table 21 is raised up by means of a raising-up device 13, in such a state that the width direction of the block Bn is directed in the vertical direction. The block Bn is clamped by means of a transfer device 15 and carried to a winding and laminating device 14, while the width direction of the block Bn is kept in the vertical direction. Then the block Bn is lowered on a stool 16, after the block Bn is once relaxed from the clamped state on this side of the device 14. As a result, the steel sheets constituting the block Bn are trued up. Thereafter, the block Bn is supplied to the space between a bobbin 93 of the winding shaft of the device 14 being kept in the vertical direction and a roll-in belt 94, to be laminated upon another core block in a wound state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a core used for electric equipment such as a transformer and a reactor, and an apparatus for manufacturing a core used for performing the method.

[0002]

2. Description of the Related Art 1 used for stationary induction electric equipment such as a transformer.
A turn-cut wound iron core is a core block or a wrapping structure in which a plurality of strip-shaped unit steel sheets are wound on one end and wrapped at both ends with a predetermined lapping allowance (lapping allowance) La. In this state, a plurality of strip-shaped unit steel plates having both ends butted at different positions are shifted from each other and a plurality of stacked iron core blocks are stacked.

FIG. 23 shows an example of the structure of a one-turn cut wound core formed in a circular shape. In this wound iron core, three core blocks B1 to B3 are provided. Are formed in a state where the joints J (overlapping portions or abutting portions) at both ends of the strip-shaped unit steel plate constituting the above are distributed stepwise in substantially the same range between the O1-O1 line and the O2-O2 line. Have been.

[0004] When the shape of the wound iron core is rectangular, FIG.
The circular wound core shown in 3 is formed into a rectangular shape and then annealed,
As shown in FIG. 24, the yokes Y1 and Y2 and the legs C1
And C2 are formed.

[0005] Various types of winding structures for wound iron cores have been proposed. One example of the structure near the joint is shown in FIG.
It was shown to. FIG. 25 shows a winding structure known as a wrap winding. In this example, each steel sheet is wound clockwise around the outer periphery of a winding frame. In this winding structure, first, the length L1 of the first innermost unit steel plate U1 is set equal to the circumferential length R1 of the outer peripheral surface of the bobbin, and the first unitary steel plate U1 is wound around the bobbin. Butts the ends together. In FIG. 25, a gap is shown at the joint of the steel plates. However, in a desirable state of the actual iron core, the gap is substantially zero.

Next, the length of the second unit steel sheet U2 from the innermost circumference is represented by L2 = R1 + La + 2πt [t is the thickness of the steel sheet, La
(≦ Lo) is a lap allowance] and wound on the first unit steel sheet with the leading end position of the second unit steel sheet U2 shifted from the rear end position of the first unit steel sheet U1 by Lo. Then, both ends are wrapped by a predetermined lap margin La. Similarly, the length Ln of the unit steel plate forming the iron core block at the position of the nth sheet from the innermost circumference of the wound iron core is expressed as Ln = Rn-1 + La + 2.
πt is set, and the both ends of the unit steel plate constituting each iron core block are joined in a state of being wrapped by the lap margin La. Here, Rn-1 is Rn-1 = R1 + (n-2) .multidot.2.pi.t [where n
≧ 2].

After the winding of one core block is completed, the leading end position of the unit steel plate to be wound next is made coincident with the leading position of the already wound core block, and the next core is formed in the same manner as described above. Wind the block.

Conventionally, as an apparatus used for manufacturing the above-mentioned wound iron core, there is known an apparatus comprising a steel sheet stacking apparatus as shown in FIG. 26 and a wound laminating apparatus as shown in FIG. Have been.

The stacking device shown in FIG.
The stacking device disclosed in Japanese Patent Application Laid-Open Publication No. 67046/1994 includes a feed roller 1A and a pressing roller 1A.
B, a steel sheet feeder 1 for feeding the steel sheet, a cutting machine (shear) 2 for cutting the fed steel sheet into a predetermined length to form a unit steel sheet, and a steel sheet feeding rather than the cutting machine 2. A fixed table 4 arranged on the front side in the feeding direction with the steel plate holding surface horizontal, a moving table 5 arranged between the fixed table 4 and the cutting machine 2, and a unit driven and cut by the cylinder 6. A step feed clamp 7 for clamping a steel sheet to the moving table 5, a step feeding device 8 for moving the moving table 5 together with the step feeding clamp 7 for a predetermined distance, and a stack of steel sheets driven by the cylinder 9 It has a tip clamp 10 for clamping the body to the fixed table 4 at the tip side, a screw rod 11b driven by an electric motor 11a, and a nut screwed to the screw rod. And a tip clamp movement mechanism 11 for moving the clamp 10 in the conveyance direction of the steel sheet.

The step feeder 8 is provided with a cam mechanism for reciprocating the moving table using the electric motor as a drive source, and after the cutting machine completes the cutting of the steel sheet SS (after the movable cutting blade of the cutting machine is retracted). The moving table 5 is advanced toward the fixed table 4 by an amount (La + 2πt) obtained by adding an increase 2πt in the circumferential length due to the thickness t of the steel plate to the lap margin La,
The step feed clamp 7 is set to the unclamped state.

The winding laminating apparatus shown in FIG. 27 is guided by a winding frame (mandrel) M rotatably supported and a pulley P to run along the winding frame M by a pulley P. And a driving mechanism (not shown) for driving the winding belt V.

FIG. 28 is a time chart showing the operation of the stacking apparatus shown in FIG. FIG. 28A shows the transport operation of the steel plate feeder 1, and FIG. 28B shows the operation of the cutting machine 2. FIG. 3C shows the clamp operation of the step feed clamp 7, and FIG. 3D shows the step feed operation by the step feed device 8. FIG. 28
(E) shows the clamping operation of the tip clamp 10, and (F) shows the feeding operation of the tip clamp 10 by the tip clamp moving mechanism 11.

When manufacturing the wound core shown in FIG. 23 using the stacking apparatus shown in FIG. 26, for example, in the wrap winding structure shown in FIG.
Is fed by a length L1 equal to the circumferential length R1 of the bobbin M, the feeder is stopped, and the step feed clamp 7 clamps the steel sheet SS to the moving table 5. At this time, the tip clamp 10 is retracted above the fixed table 4, and the tip of the steel plate SS is located at a position before the position immediately below the tip clamp 10. Step feed clamp 7
After the steel plate is clamped by the cutting machine 2, the steel plate SS is cut by the cutting machine 2.
To form the first unit steel plate U1 of the first iron core block B1. Then, the unit feed plate U1 is moved forward by the step feed unit 8 together with the moving table 5 to the left in FIG. 26 by the step feed amount La + 2πt (step feed is performed), and the step feed clamp 7 is unclamped (the clamp is released). State). Thereafter, the movable table 5 is retracted to the original position, and the tip clamp 10 is lowered to clamp the tip of the unit steel plate U1 to the fixed table 4.

Next, the steel sheet feeder 1 is restarted and the steel sheet S
S is conveyed onto the unit steel plate U1, and when it is detected that the feed amount of the steel plate by the steel plate feeder becomes equal to the value obtained by adding 2πt (t is the thickness of the steel plate) to the length L1 of the unit steel plate U1. The steel sheet SS is stopped and cut by the cutting machine 2.
Thus, a second unit steel plate U2 is formed, and this unit steel plate U2 is overlaid on the unit steel plate U1. Then unit steel plate U
After the stack of 1 and U2 is clamped to the moving table 5 by the step feed clamp 7 and the tip clamp 10 is set to the unclamped state, the moving table 5 is stepped by the step feed device 8 together with the steel plates U1, U2 and the clamp 7. The feed amount is advanced by La + 2πt. Next, the step feed clamp 7 is set to the unclamped state, the moving table 5 is returned to the original position, and then the tip clamp 10 is moved to a position where it comes into contact with the tip of the unit steel plate U2, and the unit steel plates U1, U2 are moved by the tip clamp 10. Clamp the top of the laminate.

Similarly, the operation of step-feeding the steel sheet laminate by La + 2πt, and increasing the length by 2πt on the step-feeded steel sheet laminate by the circumferential length increase by the sheet thickness. The operation of superposing the unit steel sheets is repeated a predetermined number of times to form the steel sheet laminate B1 'constituting the iron core block B1. This steel sheet laminate B1 'is equivalent to an iron core block B1 developed on a plane, and a step (step) having a slip margin equal to the lap margin La is formed at the front end thereof, and at the rear end thereof. A step (step) having a displacement La + 2πt equal to the sum of the displacement La on the front end side and 2πt is formed.

Similarly, the other iron core blocks B2 and B3
Steel sheet laminates B2 'and B3' corresponding to the development of
To form

The steel sheet laminate B1 constructed as described above
'To B3' are sequentially wound between the winding frame M and the winding belt V of the winding and laminating apparatus shown in FIG. 27 to form a wound iron core having a wrap winding structure as shown in FIG.

In the steel sheet stacking apparatus shown in FIG. 26, when the (n + 1) -th unit steel sheet Un + 1 having a length 2πt longer than the unit steel sheet Un is stacked on the n-th unit steel sheet Un, The nth or less unit steel plate Un, U already laminated
n-1... U1 need to be step-advanced in advance by the amount obtained by adding 2.pi.t to the lap margin La, and when the (n + 1) th unit steel plate Un + 1 is to be laid on the nth unit steel plate Un In this case, it is necessary to prevent the n-th and lower steel plates from being displaced by the frictional force generated between the two steel plates Un and Un + 1. If the position of the unit steel plate is displaced in the process of forming the laminated body of the steel plates, the quality of the iron core is reduced, and the characteristics thereof are deteriorated.

Therefore, in the conventional stacking device shown in FIG. 26, in order to perform the step feed of the unit steel plates already stacked, the moving table 5, the cylinder 6, the step feed clamp 7, and the step feed device 8 are connected. In order to prevent displacement of the unit steel plates already provided, the cylinder 9, the tip clamp 10, and the tip clamp moving mechanism 11 are provided.

[0020]

In the conventional winding core manufacturing apparatus described above, the winding axis of the winding laminating apparatus is arranged in the horizontal direction, and the width direction of each core block is oriented in the horizontal direction. In this state, it was difficult to completely match the center position in the width direction of each core block in each part in the longitudinal direction because the belt was fed between the winding belt V and the winding frame M in the state,
In some cases, some core blocks were obliquely wound, and the edges of the core blocks protruded from the lamination surface of the completed wound core.

As described above, if the edge of the steel sheet protrudes from the lamination surface of the wound core and the shape of the lamination surface is disturbed, it is difficult to fit the core into the window of the winding. When transporting the wound core to the next process such as the annealing process, correct the shape by hitting the traveling edge with a hammer to prevent it from being bent by external force. There was a problem that work was required.

If the iron core block is obliquely wound between the winding belt and the winding frame, the wound iron core block becomes distorted, and the ends thereof are not correctly joined. Alternatively, the gap may become non-uniform, and the magnetic properties of the iron core may deteriorate.
In order to correctly join the ends of each core block and obtain a wound core with excellent magnetic properties, the center position in the width direction of each core block should be matched as accurately as possible at each part in its longitudinal direction, and each core block should be It is necessary to wind.

In a stationary induction electric device such as a transformer, as shown in FIG. 19, in order to improve the space factor of the core when the core is fitted in the window of the winding, a plurality of types having different width dimensions are used. The iron core block is combined to make the cross section of the iron core close to a circle. When manufacturing a core having such a cross-sectional shape with a conventional core manufacturing device,
It is particularly necessary to sequentially wind a plurality of types of iron core blocks having different width dimensions between the winding belt V and the bobbin M in such a manner that their respective center positions in the width direction are matched. For example, in the example shown in FIG. 19, after core blocks Ba1 and Ba2 having small widths are sequentially wound between the winding belt V and the bobbin M, core blocks Bb1, Bb2,
, Bb7 are sequentially wound, and finally, the core blocks Ba3 and Ba4 having a narrow width are wound again to produce a wound core. In such a case, the core blocks Ba1, Ba2,
It is necessary to wind and stack a series of iron core blocks so that the center positions of the widths of Bb1 to Bb7 and Ba3 and Ba4 are matched in each part.

An object of the present invention is to provide a method of manufacturing a wound core in which the shape of the lamination surface of the wound core is prevented from being disturbed, and a correction operation in a later process can be omitted. An object of the present invention is to provide a manufacturing apparatus used for performing the manufacturing method.

Another object of the present invention is to provide a method of manufacturing a wound iron core in which the shape of a wound iron core block is prevented from being distorted and both ends of each iron core block can be always joined correctly. An object of the present invention is to provide a manufacturing apparatus used for performing the method.

[0026]

A manufacturing method according to the present invention is characterized in that a predetermined number of strip-shaped unit steel plates having the same width dimension are laminated on a fixed table in a state where the length directions thereof are aligned with each other on an iron core. A plurality of core blocks are formed in a circular shape by performing a step of sequentially forming blocks and a step of winding and laminating the core blocks formed sequentially so as to have a circular cross section by supplying the core blocks to the winding laminating apparatus. The present invention is directed to a method for manufacturing a wound iron core for manufacturing a circular wound iron core having a structure wound around and laminated.

In the present invention, a rotatable circular face plate whose upper surface is arranged along the horizontal direction is shared with the face plate so that it can rotate while projecting upward from the face plate. The winding lamination device provided with the provided winding frame, an endless winding belt provided so that a part thereof runs along the outer periphery of the winding frame, and a belt driving device for running the winding belt. When each core block formed sequentially is supplied to the winding laminating apparatus, the width direction of each core block is oriented vertically, and the lamination surface on the lower end side of each core block is placed on the upper surface of the face plate. With the abutment,
By winding each core block between the winding frame and the winding belt, a circular wound core is formed in a state where the lamination surface at one end in the width direction of each core block is located on the same plane.

In the present invention, a circular wound core having a circular cross-sectional profile is manufactured. The circular wound core manufactured by the method of the present invention is annealed as it is to be used as an iron core of electric equipment. Alternatively, if necessary, it may be formed into a rectangular shape and then annealed to be used as a rectangular iron core for electric equipment.

As described above, a face plate having a horizontal top surface, a bobbin sharing an axis with the face plate (the axis extends in the vertical direction), and a part of the bobbin traveling along the outer periphery of the bobbin The winding block is provided between the winding frame and the winding belt in a state in which the laminating surface on the lower end side is in contact with the upper surface of the horizontal face plate. When the core block is wound, the direction of the axis that always passes through the center in the width direction of the core block is perpendicular to the winding axis of the bobbin while maintaining the state in which the laminated surface at the lower end of the core block is in contact with the face plate by its own weight. (In the horizontal direction). Therefore, since a series of core blocks can be wound and laminated in a correct shape, it is possible to prevent the lamination surface from being disturbed due to the state in which the edges of the core blocks protrude from the lamination surface.

Further, with the above-described configuration, it is possible to prevent each core block from being wound in a distorted form. Can be obtained.

Further, in the present invention, a surface plate having a horizontal upper surface is arranged at a position in front of the winding laminating apparatus, and the core blocks formed sequentially are arranged with their respective width directions oriented vertically. When the core block is conveyed to a position in front of the winding and laminating apparatus, the clamp of the core block is loosened, and the core block is lowered on the surface plate to thereby set the center position in the width direction of the unit steel plate constituting the core block. It is preferable to perform the aligning operation, and then supply the core block between the winding belt and the winding frame so that the lower end side of the stacking surface is brought into contact with the upper surface of the face plate and wound.

As described above, by arranging the platen in front of the winding and laminating apparatus and performing the process of aligning the center positions of the unit steel plates constituting each iron core block, each iron core stacked on the fixed table can be obtained. When the stacking surface of the blocks is disturbed, each of the core blocks can be supplied to the winding and laminating device after the disturbance is corrected, so that a wound iron core having no disturbed stacking surface can be obtained.

According to the method of the present invention, when a plurality of types of core blocks having different width dimensions are wound and laminated to manufacture a wound core, the position of the lamination surface at one end in the width direction of each core block is determined by the upper surface of the face plate. Because they are aligned, the resulting core is
All the iron core blocks have a structure in which the lamination surfaces at one end in the width direction are located on the same plane. For example, when a stepped wound core having a step formed at an end in the width direction is manufactured using two types of core blocks having different width dimensions by a conventional method, as shown in FIG. A core wound with steps formed at both ends in the direction is obtained, but according to the method of the present invention, core blocks Ba1, Ba2, Bb1 to Bb1 to B
The structure is such that the lamination surface at one end side (lower end side in the illustrated state) in the width direction of all of b7 and Ba3, Ba4 is located on the same plane.

[0034] The wound iron core obtained by the method of the present invention is annealed after being formed in a rectangular shape as required in the next step.
When fitting the annealed wound core into the window of the winding, each core block is opened at the joint, the legs of the core are inserted into the window of the winding, and the joint of the core is removed. close. If the core is a stepped core, the center of each core block in the width direction is matched when the joint between each core block is opened and the constraint between the stacked core blocks is loosened. As shown in FIG. 19, the position between the iron core blocks is corrected so that the steps are correctly formed at both ends in the width direction, and then the legs are fitted into the windows of the winding. I do.

That is, when manufacturing a wound core by the method according to the present invention and assembling a transformer having a rectangular wound core, the following series of steps are performed.

A. A steel sheet stacking process in which a plurality of types of iron core blocks having different width directions are formed in a predetermined order by a steel sheet stacking apparatus.

B. A step of raising the iron core blocks sequentially formed in the steel sheet stacking step and orienting the width direction of the iron core blocks in the vertical direction.

C. A transport step of transporting the raised core block to the winding laminating apparatus.

D. A series of iron core blocks conveyed in the conveying process are wound and laminated between the winding belt and the bobbin with the laminating surface of each lower end abutting against the face plate of the winding laminating apparatus. Winding lamination process.

E. A forming step of forming the wound core wound in the winding lamination step into a rectangular shape.

F. An annealing step of annealing a rectangular core wound in the forming step.

G. Open the joint of the annealed wound core,
An iron core fitting step of correcting the positional relationship between the iron core blocks so as to match the center position in the width direction of the iron core blocks constituting the iron core, and inserting the iron core into the window of the winding.

As described above, when the wound iron core is manufactured with the laminated surface on the lower end positioned on the same plane, the stepped portion is formed on the lower end in the forming step and the annealing step as shown in FIG. The handling of the iron core can be facilitated as compared with the case of handling the wound iron core on which is formed.

In other words, when a step is formed at the lower end of the wound core as shown in FIG. 19, when an external force is applied to the narrow core block in the forming step or the annealing step, the position is shifted downward. There is a risk that the shape of the iron core may collapse, and in order to prevent this, it is necessary to take measures to support the lower end of the narrow iron core block. However, as shown in FIG. Just put it on a flat surface,
Since the shape of the iron core can be maintained without causing displacement between the iron core blocks, it is possible to prevent the mold from being lost without taking any troublesome measures.

In the apparatus for manufacturing a wound core according to the present invention, a predetermined number of strip-shaped unit steel sheets having the same width are laminated on a fixed table in a state where the length directions thereof are made to coincide with each other to sequentially form iron core blocks. By stacking and stacking a plurality of iron core blocks that are sequentially formed by the steel plate stacking device to be formed and the steel plate stacking device so that the cross section thereof has a circular shape, a plurality of core blocks are wound in a circular shape and stacked. And a winding laminating apparatus for forming a circular wound iron core having the above structure.In the present invention, the core block formed by the steel sheet stacking device is received, and the width direction of the core block is vertically oriented. An iron core block raising device for raising the iron core block, and a transport device for transporting the iron core block raised by the iron core block raising device toward the winding lamination device are provided.

The above-mentioned winding and laminating apparatus can rotate with a rotatable circular face plate having an upper surface arranged along a horizontal direction, sharing an axis with the face plate, and projecting upward from the face plate. A winding frame provided as described above, an endless winding belt provided so that a part thereof travels along the outer periphery of the winding frame, and a belt driving device for running the winding belt, The core block is wound between the winding frame and the winding belt so that the core block can be wound and laminated in a circular shape.

The transfer device clamps the core block raised by the core block raising device and transfers the core block to the winding and laminating apparatus while keeping the width direction of the core block vertical. A configuration is such that the leading end of the core block is supplied between the winding frame and the winding belt in a state where the laminated surface on the lower end side of the transported core block is in contact with the upper surface of the face plate.

As the steel plate stacking device, there are a fixed table having a horizontal steel plate holding surface, a steel plate feeder for conveying a strip-shaped steel plate to the fixed table side with its longitudinal direction coinciding with the conveying direction, A cutting machine for cutting the steel sheet conveyed by the steel sheet feeder, and cutting the steel sheet sequentially supplied on the steel sheet holding surface of the fixed table by the cutting machine, thereby making a plurality of sheets having lengths different by a predetermined dimensional difference ΔX. Forming a strip-shaped unit steel plate of the above, and stacking the plurality of unit steel plates on the steel plate holding surface of the fixed table in a state where the positions of the respective tip portions are sequentially shifted in the longitudinal direction and shifted by the dimension ΔL. What is formed can be used.

When such a steel sheet stacking device is used, the iron core block formed by the steel sheet stacking device is received, and the iron core block is rotated by 90 degrees so that the width direction of the iron core block is oriented vertically. An apparatus for raising an iron core block by raising the core block, and a transport device for transporting the iron core block raised by the core block raising apparatus toward the winding and laminating apparatus are provided.

The steel sheet stacking device has a clamp roller movably arranged vertically and clamp roller urging means for urging the clamp roller toward the steel sheet holding surface of the fixed table. A tip clamp that clamps the vicinity of the tip of the unit steel sheet pressed into the lower side of the clamp roller against the urging force against the fixed table, and on the fixed table at a position rearward of the tip clamp in the transport direction of the steel sheet The unit steel plate is configured to be collectively clamped, and a distance between an original position at a fixed distance from the tip clamp and a forward position set on the tip clamp side from the original position is relative to the tip clamp. A step feed clamp provided so as to be able to be displaced; a step feed mechanism for reciprocating the step feed clamp between the original position and the forward position; A clamp feed mechanism that moves the tip clamp and the step feed clamp along the longitudinal direction of the unit steel plate using the motor that is driven as the drive source, and the length of the steel plate transported on the fixed table by the steel plate feeder is the length of each unit steel plate When the value becomes equal to the value of, the conveyance of the steel sheet is stopped and the steel sheet on the fixed table is collectively clamped by the step feed clamp positioned at the original position, and then the steel sheet is cut to form a unit steel sheet. The step feed clamp, which collectively clamps the unit steel sheets on the fixed table at the original position and the unit sheet forming operation to be performed, is displaced by the shift dimension ΔL to the side that shortens the distance between the step feed clamp and the tip clamp. And push the tip of the unit steel plate clamped by the step feed clamp below the clamp roller of the tip clamp. A steel sheet feeder, a cutting machine, a step feed clamp, and a step feed mechanism so as to perform a step feed operation and a dimensional difference feed operation of moving the step feed clamp and the tip clamp forward by the dimensional difference ΔX in the forward direction in the sheet conveying direction. And a control device for controlling the clamp feed mechanism.

Also in this case, the winding and laminating apparatus is provided with a rotatable circular face plate having a horizontal upper surface, an axis shared with the face plate, and provided so as to rotate while projecting upward from the face plate. A frame, an endless winding belt provided so that a part thereof travels along the outer periphery of the winding frame, and a belt driving device for running the winding belt; a winding frame and a winding belt; The core block is wound in a circular shape by winding the core block between them.

The conveying device clamps the core block raised by the core block raising device, and conveys the core block toward the winding and laminating device while keeping the width direction of the core block vertical. A configuration is such that the leading end of the core block is supplied between the winding frame and the winding belt in a state where the laminated surface on the lower end side of the transported core block is in contact with the upper surface of the face plate.

It is preferable that the winding belt is provided such that the center in the width direction is located above the center in the width direction of the core block to be wound. If the winding belt is provided in this way, the winding belt always exerts a force to press the core block being wound against the face plate side, so that when the core block is wound, the lower end of the core block is laminated. The core block can be correctly wound while the surface is always kept in contact with the face plate.

In the present invention, it is preferable to arrange a surface plate whose upper surface is located on the same plane (horizontal plane) as the upper surface of the face plate, beside the end of the winding lamination device on the side of the core block receiving side. .

In this case, when the iron core block is transported above the surface plate, the clamp of the iron core block is temporarily released, and the iron core block which has been clamped is lowered onto the surface plate by gravity. It is preferable that the lamination surface on the lower end side of the core block is brought into contact with the contact surface of the surface plate, and then the core block is clamped again and transported to the winding lamination device side.

With such a configuration, when the clamp of the iron core block whose width direction is oriented in the vertical direction is released and the iron core block is lowered on the surface plate, the lower end of each unit steel plate is pulled by gravity. Abut on the surface plate, and the direction of each unit steel plate can be correctly oriented in the horizontal direction. Therefore, when the unit steel plates stacked on the fixed table are misaligned, the unit steel plates are misaligned. Can be corrected to eliminate the disturbance of the laminated surface of the iron core block.

In order to facilitate carrying out the wound core, the winding frame is preferably provided so as to be movable in the axial direction relative to the face plate. In this case, when the core block is wound between the winding frame and the winding belt, the winding frame is raised to a position where the winding frame projects above the face plate and cooperates with the winding belt. When unloading the reel, the bobbin is lowered to a position where the reel comes off the inside of the winding core on the face plate.

With this configuration, after the wound core is wound, the bobbin is lowered from the inside of the bobbin by lowering the bobbin to a position where it does not protrude from the upper surface of the face plate. Therefore, it is possible to easily carry out the completed circular wound iron core, and it is possible to easily automate the apparatus.

[0059]

1 to 6 show an example of the construction of a wound iron core manufacturing apparatus used for carrying out the method of the present invention. FIG. 1 is a perspective view showing the overall construction of the apparatus. FIG. 2 is a front view showing a configuration of a main part of a steel sheet stacking apparatus used in the apparatus, and FIGS. 3 and 4 are a sectional view taken along line AA and a line BB of FIG. 2, respectively. FIGS. 5 (A) to 5 (E) and 6 (A) to 6 (E) are explanatory diagrams of the operation of the steel plate stacking device used in the present invention, and FIG. 7 shows a control algorithm of a control device used in the steel plate stacking device. It is a flowchart shown. FIG. 8 is a timing chart showing the operation of the steel plate stacking device, and FIG. 9 is an explanatory diagram for explaining the positional relationship between the front end of the unit steel plate fed onto the fixed table and the front end clamp roller. 10 to 12 are perspective views illustrating the operation of the core block raising device used in the wound core manufacturing apparatus of FIG. 1, and FIGS. 13 and 14 are perspective views illustrating the operation of the transfer device used in the wound core manufacturing apparatus. FIG. FIGS. 15A and 15B show the main part of a wound laminating apparatus used in the wound iron core manufacturing apparatus of FIG.
FIG. 3 is a longitudinal sectional view showing a state of a main part when the core block is wound around a bobbin, and FIG. 2B is a top view of the main part. FIG. 16 is a longitudinal sectional view of a main part showing a state where the bobbin of the winding laminating apparatus is retracted. FIGS. 17A to 17E are explanatory diagrams of the operation of the wound laminating apparatus.

In FIG. 1, reference numeral 12 denotes a predetermined number of strip-shaped or strip-shaped unit steel plates having the same width dimension stacked on a fixed table in a state where the length directions thereof are made to coincide with each other and the edges in the width direction are aligned. A steel sheet stacking device for sequentially forming iron core blocks, and a core block for receiving the iron core block formed by the steel plate stacking device and raising the iron core block so as to vertically orient the width direction of the iron core block. The raising device 14 is a circular structure having a structure in which a plurality of core blocks are wound in a circular shape and laminated by winding and laminating core blocks sequentially formed by a steel plate stacking device so as to exhibit a circular cross section. A winding laminating device 15 for forming a wound core is a conveying device that conveys the iron core block raised by the core block raising device 13 toward the winding laminating device 14. 16 is a platen disposed in front of the position of the winding lamination apparatus 14. Hereinafter, the configuration of each of these units will be described in detail.

(A) Structure of Steel Plate Stacking Device The steel plate stacking device 12 includes a fixed table 21 supported by a suitable means on a base frame (not shown). As shown in FIG. 11, the fixed table 21 is formed in a rectangular plate shape, and the upper surface thereof is a steel plate holding surface 21a for holding a unit steel plate constituting an iron core block. The fixed table 21 is arranged with its longitudinal direction coincident with the transport direction of the steel sheet SS described later, and is positioned at the center in the width direction at almost the half on the tip 21A side. Thus, a slit 21b extending along the longitudinal direction (the direction in which the steel sheet is conveyed) is formed.

In a substantially half portion of the fixed table 21 on the rear end portion 21B side, a plurality of (three in the illustrated example) U-shaped notches 2 opened at one end side in the width direction of the fixed table 21 are provided.
1ca to 21cc are formed, and the rear end of the slit 21b communicates with a notch 21ca formed at a position close to the front end of the fixed table. These notches 21ca
.About.21 cc is provided for receiving a clamp of a core block raising device described later.

A steel sheet feeder 24 having a feed roller 22 and a pressing roller 23 is disposed behind the rear end 21 B of the fixed table 21. In addition, fixed table 21
A fixed blade (lower blade) 25 is provided between the
(Shear) 2 provided with a movable blade (upper blade) 26
7 are arranged.

A guide roller 28 and an uncoiler 29 are arranged behind the steel sheet feeder 24, and the strip-shaped steel sheet SS unwound from the drum 30 by the uncoiler 29.
Is supplied between the feed roller 22 and the press roller 23 of the steel plate feeder 24 via the guide roller 28,
The steel plate SS is fed to the fixed table 21 by the rotation of the feed roller 22.

Although not shown, a sensor for measuring the feed amount (length) of the steel sheet SS is attached to the rotation shaft of the feed roller 22, and a predetermined length of the steel sheet is fed by the sensor. When this is detected, the steel plate feeder 24 is stopped. The cutting machine 27 cuts the steel sheet SS when the steel sheet feeder 24 stops, and the strip-shaped unit steel sheet U1
, U2,... These unit steel plates are sequentially laminated on the steel plate holding surface 21a of the fixed table 21.

On one side of the fixed table 21 in the width direction, a plate-like side frame 31 extending long in the longitudinal direction of the fixed table (in the direction in which the steel sheet is conveyed) has its plate surface extending vertically. In this state, it is arranged parallel to the fixed table. On the vertical surface 31a of the side frame 31, a pair of guide rails 32A and 32B extending in parallel with each other along the transport direction of the steel plate are attached in a vertically arranged state, and by these guide rails 32A and 32B,
The first slider 34 and the second slider 35 are supported so as to be able to reciprocate in the transport direction of the steel sheet in a state where the first slider 34 is located on the front side in the transport direction of the steel sheet.

In the illustrated example, the guide rails 32A and 32A
2B is formed so as to have a dovetail-shaped cross-sectional shape (see FIGS. 3 and 4), and doves formed on slide members 36A and 36B (see FIG. 3) fixed to the back surface of the first slider 34, respectively. The groove and the guide rails 32A and 32B are fitted, and the first slider 34 is slidably supported. Similarly, dovetail grooves formed on slide members 37A and 37B (see FIG. 4) fixed to the back surface of the second slider 35 and guide rails 32A and 32, respectively.
B is fitted, and the second slider 35 is slidably supported.

Between the guide rails 32A and 32B,
A ball screw 38 extending in parallel with the two guide rails in the transport direction of the steel sheet is arranged. One end of the ball screw 38 is rotatably supported by the side frame 31 via a bearing 39, and the other end of the ball screw 38 is connected to an output shaft of a motor MT fixed to the side frame 31. As shown in FIG. 3, the ball screw 38 is screwed into a nut 40 fixed to the back surface of the first slider 34,
When the ball screw 38 is driven to rotate in one direction by the motor MT, the first slider 34 is moved forward (in the direction of the arrow H in FIG. 2) in the direction in which the steel sheet is conveyed, and the ball screw 38 is driven to rotate in the other direction. When this is done, the first slider 34 is moved rearward in the transport direction of the steel sheet.

The motor MT is composed of a servomotor or a pulse motor.
Numerical control is performed so that the stop positions of the second sliders 34 and 35 match the set positions.

As shown in FIGS. 2 and 3, the first slider 34 has the plate surface oriented in a direction perpendicular to the steel sheet transport direction with the plate surface extending along the vertical direction. A first clamp 34 comprising a clamp cylinder 41, a clamp arm 42 and a clamp roller 43 is attached to a vertical surface of the first slider 34 on the fixed table side. ing.

The tip clamp cylinder 41 is formed of an air cylinder, and the center of the piston rod 41a is located at the center in the width direction of the slit 21b provided on the fixed table with the tip of the piston rod 41a facing downward. It is arranged in the state where it was located. The tip clamp cylinder 41 has an end opposite to the side from which the piston rod 41a is led out, and is connected to the first slider 34 via a pin 45 extending in a direction perpendicular to the vertical plane of the first slider 34. Thus, the slit 21b is supported so as to be rotatable along a vertical plane that divides the slit 21b into two in the width direction.

The clamp arm 42 is provided in a state where the tip thereof is positioned forward in the direction of transport of the steel sheet, and is then moved through a pin 46 extending in a direction perpendicular to the vertical surface of the first slider 34. By connecting the end to the lower part of the first slider 34, the slit 21b is supported so as to be able to rotate along a vertical plane that divides the slit 21b into two in the width direction. Intermediate part of clamp arm 42 and piston rod 4
1a is connected via a pin 47 to the tip of the clamp arm 42, and a shaft 4 extending in the same direction as the pin 46 is attached to the tip of the clamp arm 42.
A pair of clamp rollers 43 are rotatably supported at both ends of the shaft 48. As shown in FIG. 3, the pair of clamp rollers 43, 43 are arranged with an interval larger than the width of the slit 21b, and when there is no steel sheet below the clamp rollers 43, 43, The clamp roller contacts the steel plate holding surface of the fixed table 21 on both sides in the width direction of the slit 21b. Compressed air of a predetermined pressure is always supplied to the clamp cylinder 41 when the lamination work of the steel sheet is performed.
3, 43 are constantly biased toward the fixed table 21 side.

The tip clamp 44 clamps the unit steel plate against the fixed table 21 when the unit steel plate is pushed below the clamp roller 43 by a step feed clamp described later.

The first slider 34 is also provided with a step feed cylinder 50. The step feed cylinder 50 has its center axis aligned with the guide rails 32A and 32A.
2B in the longitudinal direction and the piston rod 5
The first slider 34 is fixed to the first slider 34 by bolts 51.

As shown in FIG. 4, the second slider 35
A vertical plate portion 35a arranged with the plate surface along the vertical direction, an extension portion 35b extending downward from the lower end of the vertical plate portion, and a fixed table extending horizontally from the lower end of the extension portion 35b. And an arm 35c extending to the 21 side. The vertical plate portion 35a is provided such that the vertical surface of the fixed table 21 side is located on the same plane as the vertical surface of the first slider 34 on the fixed table side.
A piston rod connection fitting 52 is bolted to the vertical surface of the fixed table 5a at 5a. The piston rod connecting metal fitting 52 has an upright wall 52a that stands at right angles from the plate surface of the second slider 35, and the piston rod 50a is fitted into a hole provided in the upright wall 52a, and the rod 50a
A step provided in the vicinity of the front end of the wall abuts against the upright wall 52a. Then, a nut 5 is provided on a threaded portion provided at the tip of the piston rod 50a penetrating the hole of the upright wall 52a.
3, 54 (see FIG. 2) are screwed together, and the piston rod 50a and the connection fitting 52 are connected by these nuts.

The step feed cylinder 50 is composed of an air cylinder and has a return spring for returning the piston rod 50a. When the pressure in the cylinder 50 is at the atmospheric pressure, as shown in FIG. When the compressed air 50a expands and supplies compressed air into the cylinder 50,
The piston rod 50a retreats and the second slider 35
Is drawn to the first slider 34 side. By adjusting the positions of the nuts 53 and 54,
The distance between the first slider 34 and the second slider 35 when the piston rod 50a is extended is set to be equal to the step feed amount ΔL.

As shown in FIGS. 2 and 4, the cylinder portion of the step feed clamp cylinder 60 driven by compressed air is rotatably supported by the second slider 35 via the pin 61. I have. The step feed clamp cylinder 60 is disposed with the tip of the piston rod 60a facing downward and the center of the piston rod 60a facing the center in the width direction of the slit 21b. The movable clamp fitting 62 is fixed to the movable clamp. An arm 35c provided at the lower end of the second slider 35 has a fixed clamp 6
3 is fixed, and the fixing clamp 63 is
b, and is loosely inserted into the movable clamp fitting 62 so as to face the movable clamp fitting 62. The fixed clamp fitting 63 is formed so that the upper surface thereof slightly projects from the steel plate holding surface 21a of the fixed table 21.
When the compressed air is supplied to the movable clamp 0 and the movable clamp 62 is moved downward, the steel plate existing on the fixed table 21 is moved to the movable clamp 62 and the fixed clamp 63.
Is clamped at once. Second
A roller 64 that rolls on the base frame 20 with the movement of the second slider 35 is attached to the lower part of the arm 35c of the slider 35, and the second slider 35 is attached to the base frame 20 by the roller 64. Supported against.

In order not to hinder the movement of the steel sheet conveyed onto the fixed table 21 by the steel sheet feeder 24, each corner between the upper surface and the side surface of the fixed clamp fitting 63 is rounded. .

In this example, the unit cylinders U 1, U 2,..., U 2,. , A step feed clamp 65 for collectively clamping the step feeds. The step feed clamp 65 is displaced relative to the tip clamp 44 between an original position at a fixed distance from the tip clamp 44 and a forward position set on the tip clamp 44 side from the original position. A step feed mechanism 66 that reciprocates the step feed clamp 65 between the original position and the forward position is constituted by the step feed cylinder 50 and the connection fitting 52.

In the illustrated example, the step feed cylinder 50
The position of the step feed clamp 65 when the piston rod 50a is in the extended state is the original position of the step feed clamp 65, and when the second slider 35 is in contact with the first slider 34. The position of the step feed clamp 65 is the forward position of the step feed clamp. In this example, the distance between the original position and the advance position is equal to the shift dimension ΔL.

In the above example, the motor MT, the ball screw 38, and the nut 40 constitute a clamp feed mechanism 67. The clamp feed mechanism attaches the first slider 34 and the cylinder 50 to the first slider. The second slider 35 connected via the same is moved along the longitudinal direction of the unit steel plate together with the tip clamp 44 and the step feed clamp 65.

Further, in the stacking apparatus shown in FIG. 1, the steel plate feeder 24, the cutting machine 27, the step feed clamp 65, the step feed mechanism 66, and the clamp feed mechanism 67
Is provided. A sensor for measuring the thickness t of the steel sheet SS is provided between the steel sheet feeder 21 and the uncoiler 29, and the thickness t of the steel sheet measured by the sensor is given to the control device as needed. .

The above-described control device is realized by, for example, causing a computer to execute a predetermined program.
Stop the transport of the steel sheet when the length of the steel sheet transported above becomes equal to the value corresponding to the length of each unit steel sheet,
After the steel plates on the fixed table are collectively clamped by the step feed clamp positioned at the original position, the unit steel plate forming operation of cutting the steel plate to form the unit steel plate, and the unit steel plate on the fixed table at the original position. The step feed clamp, which is collectively clamped, is shifted to the side for reducing the distance between the step feed clamp and the tip clamp, and the dimension ΔL is shifted.
A step feed operation in which the distal end of the unit steel plate clamped by the step feed clamp 65 is displaced by a distance and is pushed below the clamp roller 43 of the tip clamp 44;
A sheet feeder, a cutting machine, a step feed clamp, a step feed mechanism, a clamp feed and a dimensional difference feed operation for moving the step feed clamp 65 and the tip clamp 44 forward by the dimensional difference ΔX in the transport direction of the steel sheet. Control the mechanism.

The tip clamp 44, the step feed clamp 65, the step feed mechanism 66, the clamp feed mechanism 67 using a computer, the steel sheet feeder 24,
The steel sheet stacking device 12 is constituted by the cutting machine 27, the step feed clamp 65, the step feed mechanism 66, and a control device (not shown) for controlling the clamp feed mechanism 67.

FIG. 7 is a flowchart showing an example of a control algorithm when the control device of the above-mentioned steel sheet stacking device is constituted by using a microcomputer.

Next, the operation of the steel sheet stacking apparatus will be described with reference to FIG.
6, the flowchart of FIG. 7, the time chart shown in FIG. 8, and the explanatory diagram of the laminated structure shown in FIGS. 20 to 22.

In the flowchart of FIG. 7, in addition to the CPU for controlling the operation flow of the entire apparatus, a step feed mechanism 6
6 and a CPU for controlling the clamp feed mechanism 67 are provided separately. Further, as shown in FIG. 18, the wound core is constituted by two types of core blocks having different widths, and the number of core blocks having the same width to be successively wound and laminated is represented by M.
(M is an integer). It is assumed that the number (the number of blocks) B of the unit steel plates constituting each iron core block is equal. FIG.
In the case of manufacturing a wound iron core, first, core blocks Ba1 and Ba2 are formed at M = 2, and these are continuously wound and laminated. Then, iron blocks Bb1 to Bb7 are formed at M = 7 and these are continuously formed. And wind and laminate. Thereafter, the core blocks Ba3 and Ba4 are formed with M = 2, and these are continuously wound and laminated.

The set value of the number of iron core blocks constituting the whole wound iron core is C, and the count value of the block number cumulative value counter for counting the number of already formed iron core blocks is c.

After winding all the core blocks constituting the wound core, a steel sheet is further wound around the outermost periphery and both ends of the outermost steel plate are welded to complete the wound core.

When forming the iron core block by using the above-mentioned stacking device, in step 1 of FIG. 7, a numerical value is first inputted by an input device such as a keyboard, or a numerical value displayed on a screen of a display device. Is selected, the control device is caused to read the cutting conditions of the steel sheet. The cutting conditions are an initial cutting length L1, which gives the length of the first unit steel sheet of the core block group having the same width to be successively laminated, a shift size ΔL, a lap allowance La, and a set value of the number of cuts. The total number of unit steel plates of M core blocks of the same width dimension to be wound and laminated) N, the set number of blocks (the number of unit steel plates constituting one core block) B, and the like. Here, the number-of-cuts setting value N is given by N = M × B + 1.

After reading the cutting conditions in step 1 of FIG. 7, an initial value L1 of the cutting length is set in step 2, and a count value n of a cutting counter for counting the number of times the steel sheet is cut is set.
And a count value b of a block counter for counting the number of unit steel plates constituting the iron core block.

Next, in step 3, the tip clamp 44
Is set to the initial position of the tip clamp roller 43 provided in the first position. As shown in FIG. 9, the initial position of the tip clamp roller 43 is such that the steel plate SS having a length corresponding to the length L1 of the first unit steel plate U1 is conveyed onto the fixed table 21 by the steel plate feeder 24. Sometimes, it is a position P at a predetermined distance d on the front side of the steel sheet in the transport direction of the steel sheet. Here, the fixed distance d is set smaller than the shift dimension ΔL.

Next, by executing step 4 in FIG. 7, at time t1 shown in FIG. 8, the steel sheet feeder 24 is activated to feed the steel sheet SS. In step 4, a start command is given to a drive source for driving the feed roller 22 to start feeding the steel sheet SS, and the steel sheet SS is supplied onto the fixed table 21 as shown in FIG. The length of the fed steel plate is determined by the sensor attached to the feed roller 22 to the length of the first unit steel plate (initial cutting length) L1
The feed roller 22 is stopped when it is detected that the value has become equal to. The steel plate feeder stops at time t2 in FIG.

After the feed roller 22 stops at time t2, step 5 in FIG. 7 is executed to cause the step feed clamp 65 to perform the clamping operation. This step 5
In FIG. 5B, the clamp metal 62 is lowered by driving the clamp cylinder 60 of the step feed clamp 65 as shown in FIG. 5B, and the steel plate SS on the fixed table 21 is fixed by the clamp metal 62 and the clamp metal 63.
And clamp it from above and below.

At time t3 in FIG.
After the completion of the clamping operation according to Step 5, Step 6 in FIG.
And the cutting machine (shear) 27 is started, and FIG.
As shown in (C), the steel sheet SS is cut to form a first unit steel sheet U1. After forming the unit steel plate U1, FIG.
Steps 7A to 7C are performed in parallel. At step 7A, as shown in FIG. 8 (D), the step feed cylinder 50 is operated at time t4 to move the step feed clamp 65 at the original position toward the forward position, thereby cutting the cut unit steel plate U1. It is sent to the tip clamp 44 side by the shift dimension ΔL. By this operation, as shown in FIG. 5D, the tip of the unit steel plate U1 is pushed under the tip clamp roller 43, and the tip clamp 44 clamps the tip of the unit steel plate U1. In step 7B, the first slider 34 and the second slider 35 are moved by driving the motor MT at time t4 to rotate the ball screw 38 as shown in FIG. As shown in E), the clamp feed operation is performed by simultaneously moving the tip clamp 44 and the step feed clamp 65 by the dimensional difference ΔX (= La + 2πt) to the front side in the transport direction of the steel sheet (performing the dimensional difference feed operation). Let it do. Here, t is the average thickness of the steel sheet SS, and the average thickness t is calculated from the thickness of the steel sheet read from a thickness sensor (not shown) provided between the steel sheet feeder 24 and the cutting machine 27 as needed. . In step 7C, the count value n of the number-of-cuts counter and the count value b of the block counter provided in the control device are increased by one.

After performing steps 7A to 7C of FIG. 7,
Steps 8 and 9 and Steps 10 to 15 are performed in parallel. That is, after sending the step feed clamp 65 together with the tip clamp 44 by the shift dimension ΔL,
In step 8, as shown in FIG.
5 From FIG. 8D, the piston rod 60a of the clamp cylinder 60 of the step feed clamp 65 is raised to put the step feed clamp 65 in the unclamped state. Further, after the step feed clamp 65 is in the unclamped state at time t6, step 9 is performed to extract the compressed air supplied to the step feed cylinder 50, thereby extending the piston rod 50a of the cylinder 50. 6
The step feed clamp 65 is returned to the original position as shown in FIG.

After increasing the count value n of the number-of-cuts counter and the count value b of the block counter by 1 in step 7C, in step 10, the number (N-1) obtained by subtracting 1 from the number-of-cuts setting value N is obtained. It is determined whether the value is equal to the count value n of the disconnection number counter. As a result, when N−1 = n is not satisfied, the lap margin La is calculated as a function of the number of cuts n in step 11, and the cut length Ln of the unit steel plate to be cut is calculated in step 12. This operation is represented by Ln =
The calculation is performed by the following equation: L1 + 2 (n-1) .pi.t + La. Next, at step 13, the count value b of the block counter
Is equal to or equal to the set value B. As a result, if the counted value b is not equal to the set value B, the flow returns to step 4 to drive the steel sheet feeder 24 to start feeding the next steel sheet and to overlap the first unit steel sheet U1. As shown in FIG. 6B, the length of the fed steel sheet is set to the length L2 (= L1 + 2πt) of the second unit steel sheet U2, as shown in FIG.
+ La), the sheet feeder 24 is stopped. Next, step 5 in FIG. 7 is executed, and the cylinder 60 of the step feed clamp 65 is driven to lower its piston rod, thereby being stacked on the fixed table 21 as shown in FIG. 6C. The unit steel plate U1 and the steel plate SS are collectively clamped. Thereafter, step 6 is performed to cut the steel sheet SS to form a second unit steel sheet U2. Next, step 7A is performed to feed the laminate of the first unit steel plate U1 and the second unit steel plate U2 by ΔL, and as shown in FIG. 6D, the tip of the uppermost unit laminate U2 is removed. After being pushed into the lower side of the leading end clamp roller 43, the leading end clamp 44 clamps the leading end of the laminate of the unit laminates U1 and U2.
Step 8 is performed to set the step feed clamp 65 to the unclamped state. Further, by moving the first and second sliders 34 and 35 simultaneously in step 7B, the tip clamp 44 and the step feed clamp 65 are fed by the dimensional difference feed amount ΔX, and in step 7C, the count value n of the cutting number counter and the block counter Count value b
Is incremented, and if N−1 = n is not satisfied, the lap margin La and the next cutting length Ln are calculated. If the count value b of the block counter is not equal to the set value B, the flow returns to step 4 again to feed the next steel sheet. The dimension difference feed amount ΔX is the length L of the n-th unit steel plate.
n and the difference between the length Ln-1 of the (n-1) th unit steel sheet,
ΔX = La + 2πt.

The same operation is repeated thereafter. In step 13 of FIG. 7, the count value b of the block counter is set to the set value B.
When it is determined that is equal to (when one iron core block is completed), the process proceeds to step 14, where the step feed clamp 65 and the tip clamp 44 are unclamped, and then step 15 is executed. Then, the core block is sent to the core block raising device described later.

Then, after the count value of the block counter is set to 0 in step 16, the process returns to step 10 and N-1 =
The determination of n is performed. As a result, when N-1 is not equal to n, the calculation of the lap allowance La and the calculation of the cutting length Ln of the first unit steel plate of the next iron core block are performed, and the process returns to step 4 and returns to step 4. To form a core block.
When the process returns to step 10 after forming the last core block of the core blocks having the same width dimension to be successively laminated, N-1 = n, so step 17 is performed. It is determined whether or not the count value c of the counter that counts the number of core blocks already formed is equal to the set value C. As a result, if the number of core blocks already formed is not equal to the total number of core blocks constituting the wound core, the process proceeds to step 18 to interrupt the formation of the core blocks and change the width dimension of the steel sheet SS. Command. This change in the width of the steel sheet is performed by replacing the drum 30 around which the steel sheet SS is wound. In order to facilitate the exchange of the drum, for example, a plurality of drums each of which is wound with a plurality of types of steel sheets SS necessary to form a wound iron core, is turned into a turntable that rotates around a vertically extending axis. When a command to change the width of the steel sheet is issued, the drum on which the steel sheet having the predetermined width is wound is moved to the steel sheet sending position (the position where the steel sheet is fed toward the steel sheet feeder 24). Uncoiler 29 to set
It is preferable to configure

After the change of the width of the steel sheet supplied from the steel sheet feeder 24 is completed, the process returns to step 1, and the same operation as described above is repeated to sequentially form core blocks having the changed width.

When the formation of all the core blocks constituting the wound core is completed and C = c in step 17, the outer winding length, which is the length of the steel sheet wound around the outermost periphery of the wound core, is subsequently changed. Set to perform step 19. In step 20, the steel sheet feeder 24 is driven to feed the steel sheet SS onto the fixed table by a length corresponding to the outer winding length. Next, after the steel sheet SS is cut in step 21 to obtain a steel sheet wound around the outermost periphery, step 22 is executed, and the steel sheet is sent to the core block raising device.

When the steel plate stacking device is configured as described above, the tip clamp 44 and the step feed clamp 65 may be provided side by side in the longitudinal direction of the unit steel plate, and the tip clamp 44 is urged toward the fixed table. Since a simple structure having the tip clamp roller 43 may be used, the structure of the apparatus is reduced as compared with the case where the unit steel plates on the fixed table are alternately clamped by the first clamp and the second clamp to perform the step feed. Can be easy.

When the steel sheet stacking apparatus is configured as described above, the steel sheet feeder 24 is activated during the step feed of the unit steel sheet to start feeding the steel sheet SS for forming the next unit steel sheet. Therefore, the work efficiency can be improved by shortening the period of one cycle from the completion of the conveyance of the steel sheet of the predetermined length by the steel sheet feeder 24 to the start of the conveyance of the next steel sheet.

Further, as described above, when the lap margin La is made a function of the number of cuts n and the clamp feed mechanism is operated by using a numerically controlled motor as a drive source, the dimensional difference feed amount ΔX can be arbitrarily adjusted. Therefore, it is possible to change the lap allowance for each iron core block or to control the dimensional difference feed amount according to the thickness of the steel plate, thereby contributing to an improvement in the quality of the iron core.

The dimension difference feed amount ΔX takes various values depending on the laminated structure of the iron core. For example, as shown in FIG.
The ends of each series of unit laminates that constitute each of the core blocks B1, B2,. In the case of a bat winding structure in which the parts are displaced by a constant displacement dimension ΔL, the lap allowance La is always zero, and the length of each unit steel plate is set at the position where the unit steel plate is disposed. It is equal to the circumference of the iron core. That is, in the case of FIG.
a = 0, and the length of the n-th unit laminated body from the innermost circumference is Ln = L1 + 2 (n-1) πt.

Further, as shown in FIG. 21, both ends of each unit laminated body of the second and subsequent core blocks of each iron core block are fixed at a fixed wrap margin L.
Each iron block B
When a wrap winding structure is adopted in which the joints at both ends of a series of unit laminates constituting each of the units 1, B 2,... Are displaced by a fixed displacement ΔL, a unit in the case of n ≧ 2 The length Ln of the laminate is Ln = L1 + 2 (n-
1) It is given by πt + La. In this case, both ends of the first unit steel plate abut against each other, and the second and subsequent unit steel plates have a structure in which an end portion thereof abuts on a start end portion of the unit steel plate to be wound next.

Further, the lap margin La can take different values (including 0) depending on the position where the unit laminate is arranged. For example, as shown in FIG. 22, the first iron core block has a bat winding structure with La = 0, and the second and subsequent iron core blocks have the lap margin La of the first unit steel plate set to zero and the second core block has the lap margin La of zero. Thereafter (in the illustrated example, 6
The second and subsequent unit steel sheets can be formed into a wrap winding structure.

As in the above example, the step feed mechanism 6 using the step feed cylinder 50 composed of an air cylinder is used.
With the construction of 6, the displacement dimension ΔL can be accurately obtained simply by displacing the second slider 35 toward the first slider 34 and causing the two sliders to abut each other. Since it is not necessary to perform position control for the output, the configuration of the control device can be simplified. In this case, the shift dimension ΔL is equal to the second slider 35.
Is set to be equal to the maximum value of the shift dimension ΔL, and the first and second
The second slider 3 interposed between the sliders 34 and 35
5 is attached to, for example, the first slider 34 and the second slider 35 is brought into contact with the spacer to control the amount of displacement of the first slider 34 to ΔL.
Can be arbitrarily adjusted by adopting a structure that defines In addition, by adjusting the connection position between the piston rod 50a of the step feed cylinder 50 and the connection fitting 52, the shift dimension ΔL can be arbitrarily adjusted.

The step feed mechanism 66 used in the present invention
The structure of is not limited to the above example, for example,
A screw feed mechanism including a motor that is numerically controlled, a ball screw that is rotationally driven by the motor, and a nut screwed to the ball screw is straddled between the first slider 34 and the second slider 35. A step feed mechanism 6 is provided so as to displace the second slider 35 relative to the first slider 34 by the screw feed mechanism.
6 can also be configured.

(B) Configuration of the Iron Core Block Raising Device The iron core block raising device 13 uses the guide rail 70 to move the steel plate SS in a direction perpendicular to the conveying direction (fixed table 2).
1 in the width direction), the movable frame 71 is movably supported over a predetermined range, and is arranged with a space therebetween in the transport direction of the steel sheet SS (the longitudinal direction of the fixed table 21). Support plate 7 with lower end fixed to 71
Both ends of a rotating shaft 73 extending in the longitudinal direction of the fixed table are rotatably supported at the upper ends of the fixed tables 2 and 72.

The rotating shaft 73 has three clamps 74a to 74c for clamping the iron core block Bn on the fixed table 21.
74c is attached. These clamps 74a
74c are three notches 21ca-2 of the fixed table.
The movable frame 7 is provided at a position corresponding to 1 cc.
1 moves to the fixed table 21 side when the clamp 74
a to 74c enter the notches 21ca to 21cc, respectively, and clamp the core block Bn on the fixed table 21 from above and below.

As shown in FIG. 10, a link 76 is provided at the rear end of the center clamp 74b via a pin 75.
Is connected to the distal end of the piston rod 77A of the air cylinder 77 via a pin 78. The rear end of the air cylinder 77 is connected to the movable frame 71 via a pin 79, and by driving the air cylinder 77, the clamps 74a to 74c
Can be rotated 90 degrees around the rotation shaft 73. Thereby, the clamps 74a to 74c
Is a falling position in which each tip is directed toward the fixed table as shown in FIGS. 1, 10 and 11,
As shown in FIG. 12 and FIG. 13, each tip is rotated between a standing position in which each tip faces vertically upward.

The movable frame 71 is driven by an air cylinder (not shown) to be linearly moved along the guide rails 70, 70 in the width direction of the fixed table 21.

Each time one core block Bn is completed on the fixed table 21, the core block raising device 13
Control is performed in the following sequence. That is, when the formation of the iron core block Bn is completed by the steel plate stacking device 12,
When an air cylinder (not shown) is driven, the movable frame 71 is advanced toward the fixed table 21 as shown in FIG. 10, and the clamps 74 a and 74 b enter the notches 21 ca to 21 cc of the fixed table 21. Then
The air cylinder provided in each of the clamps 74a to 74c is driven, and the iron core block Bn on the fixed table 21 is clamped by each clamp.

Next, as shown in FIG. 11, the movable frame 71 is retracted in a direction away from the fixed table 21 by a distance slightly larger than the width of the core block Bn, so that the core block Bn is It is pulled out from the feed clamp 65 to a position where it does not interfere with both clamps. Then the air cylinder 77
Are driven, and as shown in FIG.
74c is rotated to the upright position, whereby the iron core block Bn is rotated 90 degrees, and its width direction is directed in the vertical direction. Thus, the iron core block Bn
Is raised, the clamps 74a to 74c are brought into the unclamped state.

(C) Structure of the Transfer Apparatus The transfer apparatus 15 is attached to a pair of air cylinders 80, 80 spaced apart in the longitudinal direction of the fixed table 21, and to the lower ends of the piston rods of these air cylinders. By driving the respective clamps by the air cylinders 82, the raised core block Bn interferes with the clamps 74a to 74c of the core block raising device 13. It is provided so that it is clamped from above at the position where it does not. The air cylinders 80, 80 are supported by sliders guided by guide rails (not shown) extending in the longitudinal direction of the fixed table 21 on the sides of the fixed table 21, and along the direction parallel to the longitudinal direction of the fixed table 21. It is made to run. In order to move the clamp members 81 of the transfer device 15 together with the air cylinders 80 in the longitudinal direction of the fixed table 21, a driving mechanism (shown in the drawing) that drives a slider that supports the air cylinders 80 with an electric motor as a driving source. ) Is provided.

After the iron core block Bn is raised by the iron core block raising device 13, the transfer device 15 extends the piston rods of the air cylinders 80, 80 to bite the clamp members 81, 81 on the upper end of the iron core block Bn. Then, drive the air cylinders 82, 82 to
clamp n. Then, by retracting the piston rods of the air cylinders 80, 80, the clamp members 81, 81 which clamp the iron core block Bn are raised to a position where they do not interfere with the clamps 74a to 74c of the device, and in that state, a drive (not shown) The slider supporting the air cylinders 80, 80 is moved by the mechanism to move the iron core block Bn to the winding and laminating device 14 side.

As shown in FIG. 14, the transfer device 15 transfers the iron core block Bn to a position above the platen 16 disposed in front of the winding and laminating device 14. To lower the iron core block Bn, and then release the urging of the air cylinders 82 to temporarily release the clamp of the iron core block Bn. As a result, the core block Bn is lowered onto the surface plate 16 with its width direction oriented in the vertical direction, and the laminated surface on the lower end side of the core block Bn is brought into contact with the upper surface of the surface plate 16. At this time, since the lower ends of the unit steel plates constituting the iron core block Bn abut on the platen 16 by their own weights, the laminated surfaces on the lower end side of the iron core block Bn are in a state of being neatly aligned. After that, the core block Bn is clamped again by the clamp members 81, 81, and the clamped iron block Bn is supplied to the winding and laminating apparatus 14.

(D) Structure of the winding laminating apparatus As shown in FIGS. 1 and 15, the winding laminating apparatus 14 has guide rails 85, 85 fixed to a fixed frame 84 (see FIG. 15A). A slider 86 is provided which is slidably supported in a direction (arrow X direction in FIG. 15B) inclined by 45 degrees with respect to the transport direction of the core block by the transport device 15 (arrow H direction in FIG. 15B). A disk-shaped face plate 87 is rotatably supported on an upper surface of the device through a bearing (not shown). The face plate 87 is positioned so that the upper surface thereof is located on the same plane as the upper surface of the surface plate 16 disposed in front of the winding and laminating device 14.

A support plate 88 is arranged below the slider 86 with its plate surface oriented horizontally.
And the slider 86 are connected by four guide shafts 89 provided so as to extend in the vertical direction through the four vertices of the square. Slider 86 and support plate 8
8, a guide shaft 89 is slidably fitted in each of four shaft through holes provided in the lift plate 90, and the lift plate 90 is supported movably up and down. ing. A piston rod 91A of an air cylinder 91 attached to the lower surface of the support plate 88 is connected to the elevating plate 90, and the elevating plate 90 is driven by the air cylinder 91 in the vertical direction (Z direction in FIG. 15A). ing.

On the upper surface of the elevating plate 90, a reel supporting device 92 having a rotating shaft 92A sharing a central axis with the face plate 87 is attached.
A cylindrical bobbin 93 that slidably penetrates a hole provided in the center of the face plate 87 is attached.

The winding frame 93 has the face plate 87
When the piston rod 91A of the air cylinder 91 is lowered, the bobbin 93 is retracted downward as shown in FIG. Are located on the same plane as the upper surface of the face plate 87. The reel 93 together with the slider 86 and the face plate 87 can slide in the X direction inclined at 45 degrees with respect to the transport direction of the iron core block by the transport device 15 (the arrow H direction in FIG. 15B).

The winding laminating apparatus 14 also has an endless winding belt 94 formed in a loop. The winding belt 94 is rotatably supported by a frame (not shown) that moves together with the slider 86.
5 a to 95 g, a revolving roller 95 h attached to the tip of a revolving arm 97 urged to revolve toward the fixed roller 95 g by an urging device 96 using an air cylinder as a driving source, and a piston of an accumulator cylinder 98. A belt accumulator roller 95i attached to the tip of the rod 98A guides a part along the outer periphery of the bobbin 93 and a part through the outer periphery of the belt driving pulley 99. The belt driving pulley 99 is rotationally driven by a rotation driving source (not shown), and the winding belt 94 is caused to run in one direction by the belt driving pulley. By the function of the revolving roller 95h and the function of the accumulator roller 95i, the slack of the winding belt 94 is absorbed, and a portion of the winding belt 94 along the outer periphery of the winding frame 93 is constantly pressed against the winding frame 93 side. It has become.

In the illustrated example, the turning roller 95h is disposed at a position facing the fixed roller 95g via a predetermined gap, and the core block of the winding and stacking device 14 is interposed between the turning roller 95h and the fixed roller 95g. A supply port 14A is formed. In order to move the slider 86 of the winding and laminating device 14 along the guide rail 85, a driving device (not shown) using a servo motor or the like as a driving source is provided, and the core block Bn conveyed by the conveying device 15 is provided. In such a state that the fixed roller 95g is always in contact with the fixed roller 95g via the belt 94, it is received between the winding belt 94 and the winding frame 93 or between the winding belt 94 and the iron core block already wound on the winding frame. With the increase in the number of iron core blocks wound around the winding frame 93, the slider 86 can be moved by a predetermined distance in a direction inclined by 45 degrees with respect to the transport direction of the iron core blocks.

When the core block Bn is wound, in order to generate a force for pressing the laminated surface on the lower end side of the core block against the face plate 87, the winding belt 94 has a center in the width direction. It is preferable to provide Bn at a position closer to the upper side than the center in the width direction of Bn.

[0126] In order to easily carry out the completed core,
In the illustrated example, a frame (not shown) supporting the rollers 95a to 95i can be moved up and down in the vertical direction. After the winding core is completed, the winding belt 94 is loosened to remove the frame. By raising, the winding belt 94 can be retracted together with the rollers 95a to 95i to a position where it does not interfere with the winding core.

(E) Operation of the core manufacturing apparatus shown in FIG. 1 In the apparatus shown in FIG. 1, every time the steel plate stacking device 13 forms the core block Bn, the core block raising device 13
Are moved to the fixed table 21 side to clamp the iron core block Bn on the fixed table 21 to cause the clamped iron core block Bn, and as shown in FIG. Aim at it. Next, the raised iron core block Bn
Is clamped from above by the clamp members 81, 81 of the transfer device 15, and the core block Bn is raised to a position where the clamp members 81, 81 and the clamps 74a to 74c of the device 13 do not interfere with each other. Is transported toward the core block supply port 14A of the winding and laminating apparatus 14.

When the core block Bn having the width direction oriented in the vertical direction is conveyed to a position just before the winding and laminating apparatus 14 as shown in FIG. 14 and FIG. The clamp of the block is loosened, and the iron core block is lowered on the surface plate 16, and the center positions in the width direction of the unit steel plates constituting the iron core block Bn are aligned.

Next, an iron core block Bn in which the center positions of the unit steel plates in the width direction are aligned is supplied to the iron core block supply port 14A of the winding and laminating apparatus, and the lower surface of the iron core block Bn is attached to the face plate 87. By being wound between the winding frame 93 and the winding belt 94 in a state of contact with the upper surface of
The core block Bn is wound around the bobbin 93 in a state where the lamination surface on the lower end side is located on the same plane.

By repeating the above operation, the winding and laminating work of the core block group having the same width arranged at the innermost side of the wound core is performed a predetermined number of times. When the winding and laminating operation of the core block group having the same width dimension is completed a predetermined number of times, the drum 30 of the uncoiler 29 is replaced to change the width dimension of the steel sheet SS, and using this steel sheet, forming the iron core block Bn, The winding and stacking operation of the core block is performed a predetermined number of times, and the winding and stacking operation of the next core block group to be wound and stacked on the core block group arranged on the innermost peripheral side of the winding core is performed.
By sequentially performing these operations, the wound core 100 having a predetermined cross-sectional shape is wound. Finally, the steel sheet SS is cut by the cutting machine 27 to produce a steel sheet to be wound around the outermost periphery of the wound iron core, and the steel sheet is raised by the raising device 13 and then transported by the transport device 15 to be transported by the transport laminating device 14. To supply. Thereby, a steel plate is wound around the outermost periphery of the wound core.
Thereafter, both ends of the steel sheet wound around the outermost periphery are welded to complete the wound iron core.

After the winding core is completed, the rollers 95a to 95a
The frame (not shown) supporting i and the winding belt 94 is raised, and the winding belt 94 and the roller group are retracted to a position where they do not interfere with the winding core 100 as shown in FIG. Next, as shown in FIG. 17C, the bobbin 93 is lowered, and the upper end of the bobbin 93 is flush with the face plate 87. Then, as shown in FIG.
The winding core 10 on the face plate 87 by a push rod 101 or the like
0 is extruded toward the roller conveyor 102, and the wound core 100 is conveyed to the next process by the conveyor 102.

Thereafter, as shown in FIG.
3 is raised to project upward from the face plate 87, and the frame supporting the rollers 95a to 95i together with the belt 94 is lowered, so that the winding belt cooperates with the winding frame.

As described above, the platen 16 is arranged in front of the winding and laminating apparatus 14 to perform the process of aligning the center positions in the width direction of the unit steel plates constituting each iron core block Bn. In the case where there is disturbance in the lamination surface of each core block laminated on 21, the disturbance can be corrected and then each core block can be supplied to the winding laminating device 14. You can get an iron core.

The wound iron core 100 obtained by the method of the present invention
As shown in FIG. 18, an example has a structure in which the lamination surfaces on one end side (lower end side in the state of FIG. 18) in the width direction of all the iron core blocks are located on the same plane.

The wound iron core obtained by the method of the present invention is annealed after being formed in a rectangular shape as required in the next step.
When fitting the annealed wound core into the window of the winding, each core block is opened at the joint, the legs of the core are inserted into the window of the winding, and the joint of the core is removed. close. FIG.
As shown in FIG. 8, when the wound core is a stepped wound core composed of a combination of iron core blocks of various widths, the joints of the iron core blocks are opened and the iron core blocks are stacked. At the stage in which the constraints between the core blocks were loosened, the positions between the core blocks were corrected so that the center positions in the width direction of the respective core blocks were matched, as shown in FIG.
Steps are correctly formed at both ends in the width direction, and then the legs are fitted into the windows of the winding. As described above, since the positional relationship between the core blocks may be corrected when the wound core is fitted to the window of the winding, one of the laminated surfaces of all the core blocks is flush with the same plane as in the present invention. There is no problem if a stepped wound core is manufactured in a state where it is positioned above.

[0136]

As described above, according to the present invention, a face plate having a horizontal upper surface, a winding frame sharing an axis with the face plate (the axis extends in the vertical direction), and A winding belt that runs along the outer periphery of the winding frame is provided, and the core block with the width direction oriented vertically is placed in a state where the laminated surface on the lower end side is in contact with the upper surface of the horizontal face plate. And the winding belt, so that the stacking surface at the lower end of the series of iron core blocks is kept in contact with the face plate by its own weight, and the direction of the axis passing through the center in the width direction is always It can be wound on a bobbin in a state in which it coincides with a direction (horizontal direction) perpendicular to the winding axis of the bobbin. Therefore, since a series of core blocks can be wound and laminated in a correct shape, it is possible to prevent the lamination surface from being disturbed due to the state in which the edges of the core blocks protrude from the lamination surface.

Further, according to the present invention, since each core block can be prevented from being wound in a distorted form, both ends of each core block are always correctly joined, and a high-quality core having excellent magnetic characteristics can be obtained. You can get a wound core.

In particular, in the present invention, the platen is arranged in front of the winding laminating apparatus, and the clamp of the iron core block conveyed in the width direction is loosened once and lowered on the platen. In this case, since the lower end of the unit steel plate constituting each iron core block is brought into contact with the surface plate by its own weight, the center position in the width direction of each unit steel plate can be aligned,
It is possible to reliably prevent the edge portion of the steel plate from protruding from the lamination surface of each iron core block, and to obtain a wound iron core having no disorder in the lamination surface.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an overall configuration of a wound iron core manufacturing apparatus according to the present invention.

FIG. 2 is a front view showing a configuration of a main part of a steel sheet stacking apparatus used in the wound iron core manufacturing apparatus shown in FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIGS. 5A to 5E are operation explanatory diagrams sequentially showing the operation of the device shown in FIG. 1;

FIGS. 6A to 6E are operation explanatory diagrams sequentially showing operations performed after the operation shown in FIG. 5E.

FIG. 7 is a flowchart illustrating an example of an algorithm of a program executed by a computer to realize a control device for a steel sheet stacking device used in the present invention.

FIG. 8 is a time chart showing an operation of the steel sheet stacking apparatus used in the apparatus of FIG.

FIG. 9 is an explanatory diagram illustrating a positional relationship between a tip of a unit steel sheet fed onto a fixed table and a tip clamp roller in the apparatus shown in FIG. 1;

FIG. 10 is a perspective view illustrating the operation of an iron core block raising device used in the wound iron core manufacturing device of FIG. 1;

FIG. 11 is a perspective view illustrating the operation of an iron core block raising device used in the wound iron core manufacturing device of FIG. 1;

FIG. 12 is a perspective view illustrating the operation of an iron core block raising device used in the wound iron core manufacturing device of FIG. 1;

FIG. 13 is a perspective view illustrating the operation of a transfer device used in the wound iron core manufacturing apparatus of FIG. 1;

FIG. 14 is a perspective view illustrating the operation of the transfer device used in the core manufacturing apparatus of FIG. 1;

15A and 15B show a main part of a winding laminating apparatus used in the winding core manufacturing apparatus of FIG. 1, and FIG. 15A is a longitudinal section showing a state of the main part when the core block is wound around a bobbin; FIG. 2B is a top view of the relevant part.

FIG. 16 is a longitudinal sectional view of a main part showing a state in which a bobbin of a wound laminating apparatus used in the wound iron core manufacturing apparatus of FIG. 1 is retracted.

17 (A) to (E) are explanatory views of the operation of the wound laminating apparatus used in the wound iron core manufacturing apparatus of FIG. 1;

FIG. 18 is a cross-sectional view showing a cross-sectional shape of a wound core manufactured by the method of the present invention.

FIG. 19 is a cross-sectional view showing a cross-sectional shape of a wound core manufactured by a conventional method.

FIG. 20 is an explanatory view showing an example of a structure of a joint portion of a wound core.

FIG. 21 is an explanatory view showing another example of the structure of the joint of the wound core.

FIG. 22 is an explanatory view showing still another example of the structure of the joint of the wound core.

FIG. 23 is a front view schematically showing an example of the structure of a circular wound iron core.

FIG. 24 is a front view schematically showing an example of the structure of a rectangular wound iron core.

FIG. 25 is an explanatory view showing an example of the structure of the joint of the wound core.

FIG. 26 is a configuration diagram showing a configuration of a steel plate stacking device used in a conventional wound iron core manufacturing device.

FIG. 27 is a configuration diagram schematically showing a configuration of a wound laminating apparatus used for manufacturing a wound core by winding and laminating an iron core block.

FIG. 28 is a time chart for explaining the operation of the steel sheet stacking apparatus shown in FIG. 26.

[Explanation of symbols]

 Reference Signs List 12 steel plate stacking device 13 iron core block raising device 14 winding laminating device 15 transfer device 16 surface plate 21 fixed table 24 steel plate feeder 27 cutting machine 34 first slider 35 second slider 38 ball screw 40 nut 41 tip clamp cylinder 42 Clamp arm 43 Tip clamp roller 44 Tip clamp 50 Step feed cylinder 60 Step feed clamp cylinder 62 Clamp fitting 65 Step feed clamp 66 Step feed mechanism 67 Clamp feed mechanism 73 Rotating shaft 74a-74c Iron block pulling device clamp 77 Air cylinder Reference Signs List 80 Air cylinder 81 Clamping tool 87 Face plate 93 Roll frame 94 Roll-in belt MT Motor

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Arii 2-1-1, Tagawa, Yodogawa-ku, Osaka-shi, Osaka Daihen Co., Ltd. F-term (reference) 5E062 AB03 AB11

Claims (8)

[Claims] 1. A step of laminating a predetermined number of strip-shaped unit steel plates on a fixed table in a state where their length directions are aligned with each other to sequentially form iron core blocks, and winding the sequentially formed iron core blocks. A step of winding and laminating the cores so that the cross section thereof has a circular shape by supplying the cores to the laminating apparatus, thereby producing a circular core having a structure in which a plurality of core blocks are wound in a circular shape and laminated. In the method for manufacturing an iron core, the wound laminating apparatus may be configured such that a rotatable circular face plate whose upper surface is arranged along a horizontal direction shares an axis with the face plate, and protrudes upward from the face plate. A winding frame provided so as to be rotatable, an endless winding belt partially provided so as to run along the outer periphery of the winding frame, and a belt driving device for running the winding belt are provided. The core block is wound between the winding frame and the winding belt so as to be wound in a circle, and when the core blocks sequentially formed are supplied to the winding laminating apparatus, Each core block is wound between the winding frame and the winding belt in a state where the width direction of each core block is oriented in the vertical direction, and the laminated surface on the lower end side of each core block is in contact with the upper surface of the face plate. And forming the circular wound core in a state where the lamination surfaces at one end side in the width direction of each core block are positioned on the same plane. 2. A step of sequentially forming a core block by laminating a predetermined number of strip-shaped unit steel sheets on a fixed table in a state where their respective length directions are aligned, and winding the core block formed sequentially. A step of winding and laminating the cores so that the cross section thereof has a circular shape by supplying the cores to the laminating apparatus, thereby producing a circular core having a structure in which a plurality of core blocks are wound in a circular shape and laminated. In the method for manufacturing an iron core, the wound laminating apparatus may be configured such that a rotatable circular face plate whose upper surface is arranged along a horizontal direction shares an axis with the face plate, and protrudes upward from the face plate. A winding frame provided so as to be rotatable, an endless winding belt partially provided so as to run along the outer periphery of the winding frame, and a belt driving device for running the winding belt are provided. The core block is wound between the winding frame and the winding belt so as to be wound circularly, and a surface plate having a horizontal upper surface is arranged at a position in front of the winding laminating apparatus. In advance, the core blocks sequentially formed are clamped in a state where their width directions are oriented in the vertical direction, and are conveyed toward the winding laminating apparatus. Each core block having the width direction oriented in the vertical direction is wound. When the core block is conveyed to a position in front of the laminating apparatus, the clamp of the core block is loosened, and the core block is lowered on the surface plate, whereby the lower end face in the width direction of the unit steel plate constituting the core block is removed. Then, a core block in which the lower end surfaces in the width direction of the unit steel plate are aligned, and the core block is wound between the winding frame and the winding belt in a state where the laminated surface on the lower end thereof is in contact with the upper surface of the face plate. By inserting Method for manufacturing a wound core, characterized in that the stacking surface in the width direction of the one end side of the heart block in a state of being positioned on the same plane to form the circular wound core. 3. A steel sheet stacking apparatus for sequentially forming a core block by laminating a predetermined number of strip-shaped unit steel sheets on a fixed table in a state where their respective length directions are matched, and the steel sheet stacking apparatus. By winding and laminating the core blocks sequentially formed by the cross section so as to exhibit a circular shape, a winding laminating apparatus for forming a circular wound core having a structure in which a plurality of core blocks are wound in a circular shape and laminated. In a core manufacturing apparatus comprising: a core block raising device that receives a core block formed by the steel plate stacking device and raises the core block so that the width direction of the core block is directed vertically. A conveying device that conveys the iron core block raised by the iron core block raising device toward the winding laminating device, wherein the winding laminating device has a horizontal top surface. A rotatable circular face plate arranged along the direction, a bobbin provided so as to be able to rotate with the face plate while sharing an axis with the face plate and projecting upward from the face plate. An endless winding belt provided so that a portion runs along the outer periphery of the winding frame, and a belt driving device for running the winding belt. The conveying device is configured to clamp the core block raised by the core block raising device to orient the width direction of the core block in a vertical direction. The core block is conveyed toward the winding laminating apparatus while being held as it is, and the leading end of the core block is wound around the bobbin with the laminating surface on the lower end side of the conveyed core block in contact with the upper surface of the face plate. Be A winding core manufacturing apparatus characterized in that the apparatus is configured to be supplied between the coil core and the core. 4. A steel sheet stacking apparatus for sequentially forming a core block by laminating a predetermined number of strip-shaped unit steel sheets on a fixed table in a state where their length directions are aligned with each other, and said steel sheet stacking apparatus. By winding and laminating the core blocks sequentially formed by the cross section so as to exhibit a circular shape, a winding laminating apparatus for forming a circular wound core having a structure in which a plurality of core blocks are wound in a circular shape and laminated. A core block raising device for receiving a core block formed by the steel plate stacking device and raising the core block so as to vertically orient the width direction of the core block; and A conveying device that conveys the iron core block raised by the iron core block raising device toward the winding laminating device, and a conveying device disposed at a position in front of the winding laminating device. The winding laminating apparatus includes a rotatable circular face plate whose upper surface is arranged along the horizontal direction, shares an axis with the face plate, and extends upward from the face plate. A winding frame provided so as to be able to rotate in a state protruding from the end surface, an endless winding belt provided so that a part thereof runs along the outer periphery of the winding frame, and a belt for running the winding belt And a driving device, wherein the iron core block is wound between the winding frame and the winding belt so as to be wound in a circle, and the transport device is raised by the iron core block raising device. The core block is clamped, and the core block is conveyed toward the winding and laminating apparatus while the width direction of the core block is oriented vertically, and the core block is moved to a position before the winding and laminating apparatus. Conveyed By loosening the clamp of the core block with the rollers and lowering the core block on the surface plate, a core block conveyed by bringing the laminated surface on the lower end side of the core block into contact with the upper surface of the surface plate is constituted. An operation of aligning the lower end surface in the width direction of the unit steel plate to be performed, and a state in which the lower end side of the iron core block is in contact with the upper surface of the face plate, and the leading end of the iron core block is wound on the winding frame and the winding belt. And a supplying operation between the core and the core. 5. A fixed table having a horizontal steel plate holding surface, a steel plate feeder for transferring a strip-shaped steel plate to the fixed table side in a state where the longitudinal direction thereof coincides with the transfer direction, and a transfer by the steel plate feeder. And a plurality of strips whose lengths are different by a predetermined dimensional difference ΔX by cutting the steel sheet sequentially supplied on the steel sheet holding surface of the fixed table by the cutting machine. A plurality of unit steel plates are formed, and the plurality of unit steel plates are stacked on the steel plate holding surface of the fixed table in a state where the positions of the respective tip portions are sequentially shifted in the longitudinal direction and shifted by the dimension ΔL to form an iron core block. A steel sheet stacking device, and a wound core manufacturing device including a wound laminating device that winds and stacks a core block in a circular shape, wherein the core block formed by the steel plate stacking device is A core block raising device for rotating the core block by 90 degrees so that the width direction of the core block is oriented in the vertical direction, and an iron core block raised by the core block raising device. A conveying device that conveys the steel sheet to the stacking device, wherein the steel plate stacking device is provided with a clamp roller movably arranged vertically and a clamp roller for urging the clamp roller toward the steel plate holding surface side of the fixed table. A tip clamp that has a biasing means and clamps the vicinity of the tip of the unit steel plate pressed into the lower side of the clamp roller against the biasing force of the biasing means against the fixed table; and Also, the unit steel plate on the fixed table is configured to be collectively clamped at a position on the rear side in the transport direction of the steel plate, and is separated from the tip clamp by a certain distance. A step feed clamp provided so as to be relatively displaceable relative to the tip clamp between an original position and a forward position set on the tip clamp side of the original position; and And a step feed mechanism for reciprocating between the forward and forward positions, a clamp feed mechanism for moving the tip clamp and the step feed clamp along a longitudinal direction of the unit steel sheet by using a numerically controlled motor as a drive source, and the steel sheet. When the length of the steel sheet conveyed on the fixed table by the feeder becomes equal to the value corresponding to the length of each unit steel sheet, the conveyance of the steel sheet is stopped and fixed by the step feed clamp positioned at the original position. A unit steel plate forming operation for forming the unit steel plate by cutting the steel plate on the table and then cutting the steel plate at a time, and fixing the fixed steel plate at the original position. The step feed clamp which collectively clamps the unit steel plates on the unit is displaced by the shift dimension ΔL to the side for shortening the distance between the step feed clamp and the tip clamp, and is clamped by the step feed clamp. The step feed operation of pushing the tip of the unit steel plate below the clamp roller of the tip clamp and the dimensional difference feed operation of moving the step feed clamp and the tip clamp forward by the dimensional difference ΔX in the transport direction of the steel plate are performed. A control device for controlling the steel sheet feeder, the cutting machine, the step feed clamp, the step feed mechanism, and the clamp feed mechanism so as to cause the rotatable laminating apparatus to have a rotatable circular face plate having a horizontal upper surface. And a bobbin that shares an axis with the face plate and is provided so as to rotate, and a part thereof extends along the outer periphery of the bobbin. An endless winding belt provided so as to travel, and a belt driving device for running the winding belt, the core block being wound between the winding frame and the winding belt, thereby forming a core block. The transfer device is configured to clamp the core block raised by the core block raising device and keep the width direction of the core block in the vertical direction. The core block is conveyed toward the winding laminating apparatus, and the leading end of the core block is supplied between the winding frame and the winding belt in a state where the lower end side of the conveyed core block is in contact with the upper surface of the face plate. An apparatus for manufacturing a wound iron core, comprising: 6. The winding belt according to any one of claims 3 to 5, wherein a center in a width direction of the winding belt is located at a position higher than a center in a width direction of the core block to be wound. A core manufacturing apparatus according to any one of the above. 7. A platen having an upper surface located on the same plane as an upper surface of the face plate is disposed on a side of an end of the winding laminating apparatus on an iron core block receiving side. When the block is conveyed above the platen, the core block that has been clamped is once released and the clamped core block is lowered onto the platen by gravity, thereby lowering the lamination surface on the lower end side of the core block. 7. A structure in which the core block is again clamped after being brought into contact with the contact surface of the surface plate, and is conveyed to the winding laminating apparatus side.
The core manufacturing apparatus according to any one of the above. 8. The winding frame is provided so as to be able to move in the axial direction relatively to the face plate, and when the core block is wound between the winding frame and a winding belt, The winding frame is raised to a position where the winding frame protrudes above the face plate and cooperates with the winding belt, and when the manufactured core is carried out, the core is separated from the inside of the core on the face plate. The winding core manufacturing apparatus according to any one of claims 3 to 7, wherein the winding frame is configured to be lowered to a position where the winding state is reached.