JP2008010839A - Iron core manufacturing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wound core manufacturing apparatus with the proper gap or lap allowance of each abutment portion and having high quality. <P>SOLUTION: There are provided: an entrainment device 22 entraining a steel tape SS between a spool 10 and an entrainment belt 13 to wind a wound core 23; a steel tape feeder 29 feeding the steel tape by a feed roller 25; and a shear 40 that is arranged between the entrainment device and the steel tape feeder to cut the steel tape without stopping. The steel tape feeder is controlled in such a manner as to feed the steel tape at a speed equal to the entrainment speed of the steel tape by the entrainment device. Every time the steel tape of a predetermined length is fed by the steel tape feeder, it is cut by the shear. A unit steel tape is formed, and the wound core is continuously wound. The cutting length is calculated by using the thickness of the steel tape that is calculated on the basis of the belt length per one revolution of the spool. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wound core manufacturing apparatus for manufacturing a wound core by winding a steel strip between a winding frame and a winding belt and winding the steel strip around the winding frame.

  The wound iron core is wound so as to make one turn, and both ends are lapped (polymerized) with a predetermined lapping allowance (stacking allowance), or a plurality of unit steel strips that are butted with a lapping allowance are laminated. It has a structure in which a plurality of constructed iron core blocks are further laminated.

  FIG. 15 shows an example of the structure of a wound core formed in a circular shape. In this wound core, three core blocks B1 to B3 are provided, and the three core blocks are made up of unit steel strips constituting each. The joint portions (overlapped or butted portions) J at both ends are formed in a state of being distributed stepwise in substantially the same range.

  When manufacturing a wound iron core, using a reel, a number of unit steel strips are wound around the reel, but in this specification, the position of all unit steel strips in the wound iron core, The total number of unit steel strips counted from the innermost circumference of the wound iron core is used to specify the first unit steel strip, the two-unit steel strip, and so on.

  Moreover, in this specification, it is for 1 round of the surrounding surface which extends the circumference | surroundings of a winding frame along the inner peripheral surface of the n-1 (n is an integer greater than or equal to 2) piece unit steel strip from the innermost periphery of a wound iron core. The length is defined as the peripheral length Rn-1 of the iron core around which the (n-1) th unit steel strip is wound. Therefore, the peripheral length R1 of the iron core around which the first unit steel strip is wound from the innermost periphery is equal to the peripheral length of the outer peripheral surface of the winding frame.

  Various structures have been proposed as the wound structure of the wound core. Typical structures near the joint are shown in FIGS.

  The examples shown in FIGS. 17A to 17D show the vicinity of the joint portion of the winding structure known as the lap bat winding. In this example, each unit is indicated by an arrow in the figure. The steel strip is wound clockwise around the outer periphery of the reel. In this winding structure, first, the length L1 of the first unit steel strip U1 on the innermost circumference is made equal to the circumference R1 of the outer peripheral surface of the winding frame, as shown in FIG. The first unit steel strip U1 is wound around a winding frame, and both ends thereof are butt-joined. Next, the cutting length of the second unit steel strip U2 from the innermost circumference is L2 = R1 + La + 2πt [t is the thickness of the steel strip, La (≦ Lo) is the lapping margin], and shown in FIG. As described above, the second unit steel strip U2 is wound on the first unit steel strip while the tip position of the second unit steel strip U2 is shifted by Lo from the rear end position of the first unit steel strip U1. Is wrapped by a predetermined lap allowance La. Similarly, the cutting length Ln of the unit steel strip constituting the core block at the nth position from the innermost circumference of the wound core is Ln = Rn-1 + La + 2πt, and both ends of the unit steel strip constituting each core block are the same. Are joined in a state where they are wrapped by the lap allowance La. Here, Rn-1 is given by R1 + (n-2) · 2πt (where n is an integer of 2 or more).

  In the lap bat winding shown in FIG. 17, the circumferential length from the rear end of the last unit steel strip of each core block to the tip of the first unit steel strip of the next core block (the winding of the unit steel strip). The circumference measured in the direction) is the short sheet length Ls, and after winding the last unit steel strip Un of the first core block B1, the top position of the next core block B2 is made the top position of the previous core block In order to match, the short sheet Us whose length is equal to the short sheet length Ls is wound.

  In this specification, the short sheet is handled as one of the unit steel strips, but this short sheet is not included in the constituent elements of the iron core block, and is handled as a short sheet interposed between adjacent iron core blocks.

  Here, it is assumed that the last unit steel strip of the core block is the nth unit steel strip from the innermost circumference, and the first unit steel strip of the next core block from the rear end portion of the nth unit steel strip. Ls = Rn + 2πt−NB × La = Rn− (n + 1) La. Here, NB is the number of unit steel strips constituting one core block inside the short sheet.

  In this lap bat winding, for example, the short sheet interposed between the first iron core block and the second iron core block is the NB + 1st unit steel strip, and the first unit steel strip of the second iron core block is NB + 2nd unit steel strip.

  In lap bat winding, when focusing on the unit steel strip in each core block, the cutting length Ln (n is the unit counted from the innermost circumference of the wound core) of the second unit steel strip located in each core block The number of steel strips) is Ln = Rn-1 + 2πt.

  In the example shown in FIG. 17, one core block is composed of four unit steel strips and one short sheet. After the unit steel plate U4 is wound as shown in FIG. As shown in D), a short sheet Us is wound. Similarly, as shown in FIG. 5E, the iron core block after the second iron core block B2 is wound on the iron core block B1 to constitute a wound iron core. According to this lap bat winding, since the short sheet is wound around the outermost periphery of the core block, the wound core can be wound into a perfect circle.

  18A to 18C show a winding structure known as wrap winding. In this winding structure, without providing a short sheet, by shifting the tip position of the unit steel strip to be wound next by an amount corresponding to the short sheet length Ls each time winding of each core block is completed, Winding is performed with the leading position of each core block being matched with the leading position of the already wound core block. According to this structure, excellent iron core performance can be obtained, but since the short sheet is not wound, the wrapped portion is wound into a raised shape.

  FIG. 19 shows a winding structure known as bat winding. In this winding structure, a predetermined gap Lo is provided between the rear end of each unit steel strip and the front end of the next unit steel strip. A series of unit steel strips are wound while forming. The cutting length of each unit steel strip in this case corresponds to the case where the lap allowance La = 0 is set in the buttrap winding, and Ln = Rn-1 + 2πt. Each time the winding of each core block is finished, the tip position of each core block is aligned by shifting the tip position of the unit steel strip to be wound next by an amount corresponding to the short sheet length Ls. When the last unit steel strip of each iron core block is located at the nth from the innermost circumference, the short sheet length Ls in the case of bat winding is given by Ls = Rn- (n-1) Lo.

  In FIGS. 17 and 18, for convenience, a minute gap g is illustrated between the rear end of each unit steel strip and the front end of the next unit steel strip. However, in an actual iron core, this minute gap g is substantially zero. The adjacent end portions of the unit steel strip are arranged in contact with each other. Also in the winding structure shown in FIG. 19, the minute gap g between the front end and the rear end of the unit steel strip is zero, and the adjacent end portions of the unit steel strip are arranged in contact with each other.

  Conventionally, when manufacturing a wound core having a winding structure as shown in FIGS. 17 to 19, a wound core manufacturing apparatus disclosed in Patent Document 1 has been used.

When the shape of the wound iron core is rectangular, the circular wound iron core shown in FIG. 15 is formed into a rectangular shape and then annealed, and as shown in FIG. 16, the yoke portions Y1 and Y2 and the leg portion C1. And a rectangular wound iron core having C2.
JP-A-7-335466

  In the wound core manufacturing apparatus disclosed in Patent Document 1, a steel strip is fed at a predetermined speed, and is cut by a fixed amount while being wound around a winding frame to form a unit steel strip. The cutting length was calculated by calculation using the detection value of the steel strip thickness detector.

  Therefore, when the length of each unit steel strip is set using the steel strip thickness t as the detection value of the steel strip thickness detector, a detection error due to the detection error of the steel strip thickness detector or the shape of the steel strip has occurred. Sometimes, in a wound iron core by bat winding, the gap between each butted portion widens or narrows, and the quality deteriorates.

  In addition, in a wound iron core wound by wrapping or wrapping wrap, the wrap allowance widens or decreases, and the quality deteriorates.

  Therefore, in the conventional apparatus, the worker performs the operation of correcting the cutting length while constantly monitoring the state of the iron core in the middle of winding.

  In addition, since the thickness of the winding belt changes depending on the tension of the belt, it is extremely difficult to make the feeding speed of the steel strip by the steel strip feeder equal to the winding speed of the steel strip by the winding device. In the case of an iron core with a non-round wrap winding, the feeding speed of the steel strip is different even during one rotation of the winding frame. If the steel strip winding speed and the steel strip feeding speed are different, the space factor changes, and if the steel strip feeding speed is slow relative to the steel strip winding speed, the pulling force works on the steel strip, The space factor increases and a hard iron core is created. This is because after annealing to remove the distortion of the iron core in the subsequent process, the iron core is disassembled once and it is difficult to return to the original iron core shape when combined with the winding coil again. If it becomes an iron core, and the tension is applied, the steel strip is pulled and the position of the lap is shifted, which sometimes produces defective products. On the other hand, if the feeding speed of the steel strip is higher than the steel strip winding speed, the steel strip will loosen, causing errors in the meandering and cutting length of the steel strip, and the side surface of the iron core will be damaged and the lapping allowance will increase. Or the quality was reduced.

  The object of the present invention is to calculate the cutting length of the unit steel strip using the thickness of the steel strip calculated based on the belt length per rotation of the winding frame, so that the gap or lap allowance of each butt portion is calculated. An object of the present invention is to provide a wound core manufacturing apparatus capable of manufacturing an appropriate and high quality wound core.

  Another object of the present invention is to manufacture the steel strip with a constant space factor by accurately matching the feeding speed of the steel strip by the steel strip feeder with the winding speed of the steel strip by the winding device. An object of the present invention is to provide a wound core manufacturing apparatus that produces a wound core with good workability in a post-combination process.

  The first invention is directed to a wound core manufacturing apparatus for manufacturing a wound core having a structure in which a plurality of core blocks each made of a plurality of unit steel strips having both ends wrapped with a predetermined lap allowance La are stacked. And an endless winding belt driven by a belt motor as a driving source and a winding frame driven to rotate by the winding belt, and an uncut steel strip supplied to the steel strip receiving position. The uncut steel strip is fed toward the steel strip receiving position by a winding device that winds the steel strip around the reel by winding between the reel and a feed roller that is driven to rotate by using a feed motor as a drive source. Steel belt feeder, belt movement amount calculation means for calculating the movement amount of the winding belt immediately before being wound into the winding device, and the amount of movement of the winding belt, The belt length is calculated and the belt length is the circumference of the reel and the circumference of the iron core wound on the reel, and the innermost of the core to be manufactured that is output from the circumference calculator The steel strip thickness calculating means for calculating the thickness t of the uncut steel strip based on the circumference of n-1 (where n is an integer equal to or greater than 2) sheets from the circumference, and the maximum thickness of the wound core to be manufactured The length of one turn of the circumferential surface extending around the winding frame along the inner peripheral surface of the (n−1) th unit steel strip from the inner periphery is the length of the iron core around which the (n−1) th unit steel strip is wound. The circumference corresponding to the circumference Rn-1 plus the length increase 2πt due to the thickness t of the uncut steel strip and the lapping allowance La is the innermost circumference of the wound core. Unit steel strip length calculation means for calculating the cutting length Ln of the unit steel strip constituting the iron core block at the position of the nth sheet from the position, and the feed length of the uncut steel strip fed by the steel strip feeder The feed length of the uncut steel strip, which is arranged between the steel strip length measuring means and the steel strip feeder and the winding device and is measured by the steel strip length measuring means, is calculated by the unit steel strip length calculating means. When the length becomes equal to the cut length, the uncut steel strip fed by the steel strip feeder is cut without stopping to form a unit steel strip, and the feeder driving speed of the steel strip feeder is entrained. Feeder control means for controlling the steel strip feeder so as to match the winding speed of the steel strip, and the rear end of the preceding unit steel strip being wound on the winding device and the subsequent unit steel to be wound next A gap formation command generating means for generating a gap formation command immediately after detecting that the shear has cut the preceding unit steel strip when a gap needs to be formed between the leading end of the strip, and a gap formation command Occurred Until the gap is formed, the gap forming feeder control means for controlling the steel strip feeder so as to change the feeding speed of the uncut steel strip constituting the subsequent unit steel strip, and the reel Tip reference angular position detection means for detecting the angular position of the tip of the first unit steel strip to be wound on the winding frame as the tip reference angular position, and the steel strip from the rear end of the last unit steel strip of each core block The short sheet length calculation means for calculating the arc length to the tip reference angle position measured in the winding direction as the short sheet length Ls, and the steel by the steel strip feeder when the last unit steel strip of the core block is cut The operation of controlling the steel strip feeder so that the feeding of the steel strip is resumed after the feeding of the strip is temporarily stopped and the reel is rotated by a rotation angle corresponding to the short sheet length Ls. And iron After the last unit steel strip of the block is cut, the short sheet length Ls is given to the shear as a cutting length, and the steel strip equal to the short sheet length is continuously wound around the outer periphery of the core block without stopping. And a block tip alignment means to be selectively performed.

  The second invention is directed to a wound core manufacturing apparatus for manufacturing a wound core having a structure in which a plurality of core blocks each made of a plurality of unit steel strips having both ends wrapped with a predetermined lap allowance La are stacked. An endless winding belt driven by a belt motor as a driving source and a winding frame rotated by the winding belt, and the steel belt supplied to the steel strip receiving position is wound around the winding belt and the winding frame. Steel that feeds the uncut steel strip toward the steel strip receiving position by a winding device that winds the steel strip around the reel by being wound between and a feed roller that is rotationally driven using a feed motor as a drive source A belt feeder, a belt movement amount calculating means for calculating a movement amount of the winding belt immediately before being wound into the winding device, and a bell per rotation of the winding frame based on the movement amount of the winding belt. The circumference is calculated by calculating the length and the belt length is the circumference of the reel and the circumference of the iron core wound around the reel, and the innermost circumference of the wound core to be manufactured, which is output from the circumference calculator To n-1 (where n is an integer equal to or greater than 2), the steel strip thickness calculating means for calculating the thickness t of the uncut steel strip, and the innermost winding core to be manufactured The circumference of the core around which the (n-1) th unit steel strip is wound is the length of one turn of the circumferential surface extending around the winding frame along the inner peripheral surface of the (n-1) th unit steel strip from the circumference. The length corresponding to the length Rn-1 plus the peripheral length Rn-1 plus the length increase 2πt due to the thickness t of the uncut steel strip and the lap allowance La is taken from the innermost circumference of the wound core. Unit steel strip length calculation means for calculating the cutting length Ln of the unit steel strip constituting the iron core block at the n-th position and the feed length of the uncut steel strip fed by the steel strip feeder are measured. Cutting in which the feed length of the uncut steel strip, which is arranged between the strip length measuring means and between the strip feeder and the winding device and is measured by the strip length measuring means, is calculated by the unit strip length calculating means. When the length becomes equal to the length, the uncut steel strip fed by the steel strip feeder is cut without stopping to form a unit steel strip, and the feeder drive speed of the steel strip feeder is steel by the entraining device. Feeder control means for controlling the steel strip feeder so as to match the winding speed of the belt, the rear end of the preceding unit steel strip being wound on the winding device, and the subsequent unit steel strip to be wound next When it is necessary to form a gap with the tip, a gap formation command generating means for generating a gap formation command immediately after detecting that the shear has cut the preceding unit steel strip, and a gap formation command is generated. sometimes Until the cap is formed, the gap forming feeder control means for controlling the steel strip feeder so as to change the feeding speed of the uncut steel strip constituting the subsequent unit steel strip, and wound on the reel Tip reference angular position detection means for detecting the angular position of the tip of the first unit steel strip on the winding frame as the tip reference angular position, and winding of the steel strip from the rear end of the last unit steel strip of each core block Short sheet length calculation means for calculating the length obtained by multiplying the arc length to the tip reference angle position measured in the turning direction by a predetermined adjustment factor as the short sheet length Ls', and the last unit steel strip of the iron core block are cut In this case, the feeding of the steel strip by the steel strip feeder is temporarily stopped and the reel is rotated by the rotation angle corresponding to the short sheet length Ls', and then the feeding of the steel strip by the steel strip feeder is resumed. Control steel strip feeder And after the last unit steel strip of the core block is cut, the short sheet length Ls ′ is given to the shear as the cutting length, and the steel strip equal to the short sheet length is continuously stopped without stopping the steel strip. Block tip alignment means for selectively performing the winding operation is provided.

  A third invention is a wound core manufacturing apparatus for manufacturing a wound core having a structure in which a plurality of core blocks made of a plurality of unit steel strips laminated at both ends are laminated with a lap margin being zero. It has an endless winding belt driven by a belt motor as a drive source and a winding frame that is rotationally driven by the winding belt. The steel strip supplied to the steel strip receiving position is covered with the winding belt and the winding belt. The uncut steel strip is fed toward the steel strip receiving position by a winding device that winds the steel strip around the winding frame by being wound between the frame and a feed roller that is rotationally driven using a feed motor as a drive source. Steel belt feeder, belt movement amount calculating means for calculating the movement amount of the winding belt immediately before being wound into the winding device, and the belt length per rotation of the winding frame based on the movement amount of the winding belt A circumference calculating means for calculating the belt length as the circumference of the winding frame and the circumference of the iron core wound around the winding frame, and n output from the innermost circumference of the wound core to be manufactured, which is output from the circumference calculating means. -1 (where n is an integer equal to or greater than 2) the steel strip thickness calculating means for calculating the thickness t of the uncut steel strip, and the innermost circumference of the wound core to be manufactured The circumferential length Rn of the iron core around which the (n-1) th unit steel strip is wound is defined as the length of one turn of the circumferential surface extending around the winding frame along the inner peripheral surface of the (n-1) th unit steel strip. -1 and the length corresponding to the circumference length Rn-1 plus 2πt increase in length due to the thickness t of the uncut steel strip at the nth position from the innermost circumference of the wound core. A unit steel strip length calculating means for calculating the cutting length Ln of the unit steel strip constituting the block, a steel strip length measuring means for measuring the feed length of the uncut steel strip fed by the steel strip feeder, When the feed length of the uncut steel strip placed between the belt feeder and the winding device and measured by the steel strip length measuring means becomes equal to the cutting length calculated by the unit steel strip length calculating means The uncut steel strip fed by the steel strip feeder is cut without stopping to form the unit steel strip, and the feeder driving speed of the steel strip feeder matches the steel strip winding speed by the winding device A gap between the feeder control means for controlling the steel strip feeder and the rear end of the preceding unit steel strip being wound around the winding device and the front end of the subsequent unit steel strip to be wound next. Gap formation command generating means for generating a gap formation command immediately after detecting that the shear has cut the preceding unit steel strip when it is necessary to form, and a gap is formed when the gap formation command is generated Until then, the gap forming feeder control means for controlling the steel strip feeder so as to change the feeding speed of the uncut steel strip constituting the subsequent unit steel strip, and the first unit wound on the reel Measured in the winding direction of the steel strip from the rear end of the last unit steel strip of each core block, the tip reference angular position detection means that detects the angular position of the steel strip tip on the reel as the tip reference angular position. When the last unit steel strip of the iron core block is cut, the steel strip feeder temporarily feeds the steel strip once the arc length to the tip reference angle position is calculated as the short seat length Ls. The operation of controlling the steel strip feeder to resume the feeding of the steel strip by the steel strip feeder after the reel is stopped and rotated by the rotation angle corresponding to the short sheet length Ls, and the last unit steel of the iron core block The band is cut A block tip alignment means for selectively performing an operation of giving the short sheet length Ls as a cutting length to the shear after being wound and continuously winding the steel strip equal to the short sheet length around the outer periphery of the iron core block without stopping. It is made to comprise.

  A fourth aspect of the present invention is a wound core manufacturing apparatus for manufacturing a wound core having a structure in which a plurality of core blocks made of a plurality of unit steel strips laminated at both ends in a state of zero lap are laminated. It has an endless winding belt driven by a belt motor as a drive source and a winding frame that is rotationally driven by the winding belt. The steel strip supplied to the steel strip receiving position is covered with the winding belt and the winding belt. The uncut steel strip is fed toward the steel strip receiving position by a winding device that winds the steel strip around the winding frame by being wound between the frame and a feed roller that is rotationally driven using a feed motor as a drive source. Steel belt feeder, belt movement amount calculating means for calculating the movement amount of the winding belt immediately before being wound into the winding device, and the belt length per rotation of the winding frame based on the movement amount of the winding belt A circumference calculating means for calculating the belt length as the circumference of the winding frame and the circumference of the iron core wound around the winding frame, and n output from the innermost circumference of the wound core to be manufactured, which is output from the circumference calculating means. -1 (where n is an integer equal to or greater than 2) the steel strip thickness calculating means for calculating the thickness t of the uncut steel strip, and the innermost circumference of the wound core to be manufactured The circumferential length Rn of the iron core around which the (n-1) th unit steel strip is wound is defined as the length of one turn of the circumferential surface extending around the winding frame along the inner peripheral surface of the (n-1) th unit steel strip. -1 and the length corresponding to the circumference length Rn-1 plus 2πt increase in length due to the thickness t of the uncut steel strip at the nth position from the innermost circumference of the wound core. A unit steel strip length calculating means for calculating the cutting length Ln of the unit steel strip constituting the block, a steel strip length measuring means for measuring the feed length of the uncut steel strip fed by the steel strip feeder, When the feed length of the uncut steel strip placed between the belt feeder and the winding device and measured by the steel strip length measuring means becomes equal to the cutting length calculated by the unit steel strip length calculating means The uncut steel strip fed by the steel strip feeder is cut without stopping to form the unit steel strip, and the feeder driving speed of the steel strip feeder matches the steel strip winding speed by the winding device A gap between the feeder control means for controlling the steel strip feeder and the rear end of the preceding unit steel strip being wound around the winding device and the front end of the subsequent unit steel strip to be wound next. Gap formation command generating means for generating a gap formation command immediately after detecting that the shear has cut the preceding unit steel strip when it is necessary to form, and a gap is formed when the gap formation command is generated Gap forming feeder control means for controlling the steel strip feeder so as to reduce the feeding speed of the uncut steel strip constituting the subsequent unit steel strip, and the first unit wound on the reel Measured in the winding direction of the steel strip from the rear end of the last unit steel strip of each core block, the tip reference angular position detection means for detecting the angular position of the steel strip tip on the reel as the tip reference angular position Short sheet length calculation means for calculating the length obtained by multiplying the arc length to the tip reference angle position by a predetermined adjustment coefficient as the short sheet length Ls', and when the last unit steel strip of the iron core block is cut, The steel strip feeder is controlled so that the feeding of the steel strip by the steel strip feeder is resumed after stopping the feeding of the steel strip by the strip feeder and rotating the reel by the rotation angle corresponding to the short sheet length Ls'. Operation and iron core bro After the last unit steel strip of the hook is cut, the short sheet length Ls' is given to the shear as the cutting length, and the steel strip equal to the short sheet length is continuously wound around the core block without stopping. And a block tip alignment means to be selectively performed.

  According to a fifth aspect of the invention, in addition to the first to fourth aspects, the feeder control means includes a belt movement amount calculating means for calculating a movement amount of the winding belt immediately before being wound into the winding device, and movement of the winding belt. Based on the amount, the belt movement speed calculation means for calculating the belt calculation movement speed and the belt drive speed and belt calculation speed commanded to drive the belt motor are input, and the command is issued to drive the feed motor. The steel strip calculated based on the difference between the belt drive speed and the belt calculation movement speed in order to make the new feeder drive speed after correcting the feeder drive speed equal to the steel belt winding speed by the winding device Feeder control calculation means for calculating a new feeder drive speed in addition to the feeder drive speed, and a new feeder drive speed. It is obtained so as to drive the motor.

  In the sixth invention, in addition to the first to fifth inventions, the belt movement amount calculating means drives the winding belt to rotate the winding frame several times before cutting the first uncut steel strip. The obtained belt movement amount is corrected by a previously measured reel circumference, and the corrected belt movement amount is calculated.

  As described above, according to the first and second inventions, the average length of the steel strip is calculated using the belt length per rotation of the winding frame, that is, the circumference of the iron core wound around the winding frame. Like steel strip thickness detectors, detection errors and detection errors do not occur, the length of each unit steel strip is accurately calculated, and the quality of the lap or lap bat is high, with appropriate lap allowance and little variation. A wound core can be manufactured.

  According to the third and fourth aspects of the invention, the average plate thickness of the steel strip is calculated using the belt length per rotation of the winding frame, that is, the peripheral length of the iron core wound around the winding frame. It is possible to manufacture a high-quality wound core with a small bat.

  According to the fifth invention, even if the thickness of the winding belt 13 changes depending on the belt tension, the feeder driving speed is made equal to the winding speed of the steel strip, so that the steel strip is attracted between the belt and the feeder. The iron core will not be tightened and the iron core will be reproducible and positive in the subsequent process.

  According to the sixth aspect, by measuring the circumference of the winding frame, no error is caused in the calculation of the belt movement amount. Further, the belt movement amount can be calculated with high accuracy by rotating the winding frame several times.

  FIG. 1 schematically shows a mechanical configuration of an embodiment of the present invention. In FIG. 1, reference numeral 10 denotes a reel attached to a rotary shaft supported by a slide device 11 so as to be movable in the horizontal direction. Is a cylinder for urging the reel 10 in the left direction in the drawing, and 13 is an endless winding belt. The belt is supported by a reel 10 and guide pulleys 14a and 14b supported at fixed locations in the vicinity of the reel 10. Are wound around guide reels 15, 15,... Appropriately arranged around the reel 10, one drive pulley 16, and a pulley 18 constituting an accumulator 17. The pulley 18 of the accumulator is connected to the piston rod of the cylinder 19, and the pulley 18 is urged to the right in the drawing by the cylinder 19 to apply tension to the belt 13. The driving pulley 15 is connected to a belt motor 21 via a belt 20, and the winding belt 13 is driven in the direction of the arrow in the drawing by the rotation of the driving pulley 15, and the winding frame 10 is driven to rotate counterclockwise in the drawing. It is like that. A winding device 22 is constituted by the winding belt 13, the winding frame 10, the pulleys 14 a, 14 b, 15, 16, 18, the cylinder 19 and the belt motor 21.

  In this winding device, the inner side of the belt 13 along the outer periphery of the pulley 14a is a steel strip receiving position P. When the uncut steel strip SS is supplied to the steel strip receiving position, the steel strip is wound. The winding belt 13 is wound around the winding frame 10 and wound around the outer periphery of the winding frame 10. A unit steel strip having a predetermined length is sequentially wound between the winding belt 13 and the winding frame 10, whereby the wound iron core 23 is formed on the outer periphery of the winding frame 10. As the diameter of the wound core 23 increases, the winding frame 10 is displaced leftward in the drawing, and the pulley 18 of the accumulator 17 is displaced leftward in the drawing.

  In order to supply the uncut steel strip SS to the winding device 22, a feed roller 25, a press roller 26, and a feed that drives the feed roller 25 via a belt 27 are disposed behind the steel strip receiving position P of the winding device 22. A steel strip feeder 29 provided with a motor 28 is provided. Pinch rollers 30 and 31 configured to be openable and closable are disposed behind the steel strip feeder 29. An uncut steel strip SS unwound from a roll by an uncoiler (not shown) feeds the feed rollers through the pinch rollers 30 and 31. The unrolled steel strip SS is supplied to the winding device 22 by the feed roller 25.

  Further, a tip detection sensor 32 for detecting the tip of the uncut steel strip SS is arranged on the outlet side of the steel strip feeder 29, and the tip of the uncut steel strip SS fed by the steel strip feeder 29 passes the position of the sensor 32. When this occurs, this sensor outputs a detection signal.

  One of the pinch rollers 30 and 31 is driven by an electric motor (not shown), and moves the uncut steel strip SS unwound by the uncoiler toward the steel strip feeder 29. When the uncut steel strip SS is sandwiched between the feed roller 25 and the presser roller 26 and the tip of the uncut steel strip SS is detected by the sensor 32, the space between the pinch rollers 30 and 31 is opened and the uncut steel strip SS is opened. Is released.

  A shear 40 is disposed between the steel strip feeder 29 and the winding device 22. The shear 40 includes shears 42 and 43 driven by a shear motor 41, and an uncut steel strip SS fed by the steel strip feeder 29 is given to the winding device 22 through between the shears 42 and 43. .

  In order to detect the amount of movement of the winding belt 13, rollers 45A and 45B facing each other with the winding belt interposed therebetween are provided, and the roller 45A is urged toward the roller 45B by a spring 46, and this roller 45A A rotary encoder E1 is attached to the rotary shaft. The number of output pulses of the encoder E1 is proportional to the moving amount of the belt. The output pulse of the encoder E1 is input to the belt feed counter 47, from which a belt feed count value CB indicating the amount of belt movement is output.

  Further, in order to measure the feed length of the uncut steel strip SS by the steel strip feeder 29, a rotary encoder E2 is attached to the rotating shaft of the presser roller 26, and this encoder E2 outputs a pulse signal every time the roller 26 rotates by a minute angle. appear. The number of output pulses of the encoder E2 is proportional to the feed length of the uncut steel strip SS. The output pulse of the encoder E2 is input to the feeder counter 48 and counted, and the feeder counter 48 outputs a feeder count value CF indicating the feed length of the uncut steel strip SS.

  Further, in order to detect the rotation angle of the reel 10, a rotary encoder E3 is attached to the rotating shaft of the reel 10, and this encoder E3 generates a pulse every time the reel 10 rotates by a minute angle. The pulses output from the encoder E3 are input to the reel counter 49 and counted, and the counter 49 outputs a reel count value CM corresponding to the rotation angle of the reel 10.

  Each rotary encoder may be any one that generates a pulse signal each time it rotates by a minute angle, and has a projector and a light receiver that are arranged to face each other and a large number of slits at minute intervals. Well-known optical type provided with a light shielding plate arranged so as to block the gap between them, a rotor formed with a large number of magnetic poles in the circumferential direction and magnetic detection elements such as a pickup coil and a Hall IC Arbitrary types can be used, such as those comprising a stator that detects each magnetic pole of the rotor and outputs a pulse signal.

  The tip detection sensor 32 may be any sensor that can detect the uncut steel strip SS in a non-contact manner. For example, the tip detection sensor is disposed so as to face each other with the uncut steel strip SS in between. An optical type composed of a projector and a light receiver, a proximity switch that operates when an uncut steel strip SS comes close, and the like can be used.

  FIG. 2 shows a specific configuration example of the wound core manufacturing apparatus having the basic configuration shown in FIG. 1, and the same reference numerals are given to the same parts in FIG. . In the example shown in FIG. 2, the pinch rollers 30 and 31 and the steel strip feeder 29 are arranged on the mount 50, and the uncut steel strip SS is widened between the pinch rollers 30 and 31 and the steel strip feeder 29. A width guide 51 that restricts the direction is arranged. An uncoiler UC for unwinding the uncut steel strip wound around the roll is disposed on the side of the gantry 50, and the uncut steel strip SS supplied from the uncoiler UC passes between the pinch rollers 30 and 31 and the width guide 51. The steel strip feeder 29 is fed between the feed roller 26 and the presser roller 27.

  A main frame 52 of the apparatus is disposed adjacent to the gantry 50, and the shear 40 is supported at an end of the main frame 52 on the gantry 50 side. The gantry 52 also supports a rotation shaft 54 of an opening / closing arm 53. The open / close arm 53 can rotate between an open position indicated by a chain line in the drawing and a closed position indicated by a solid line around the rotation shaft 54, and is used when winding a wound iron core. Is locked in a closed position by a lock mechanism (not shown), and is rotated to an open position when the wound core is carried out.

  The frame 52 is also provided with a window 58, and a movable block 55 provided with a part of the window 58 passing through the window 58 is slidable in the horizontal direction by the slide device 11 including the guide rails 11a and 11a. It is supported. The winding frame 10 is rotatably supported by the movable block 55, and the guide pulleys 14a and 14b located in the vicinity of the winding frame are supported by the front end portion of the opening / closing arm 53 and the main frame 52, respectively. Further, other guide pulleys 15, 15,... Are attached to the main frame 53 and the opening / closing arm 53, and the drive pulley 16 is attached to the main frame 52. In this example, a pair of pulleys 18 constituting the accumulator 17 is provided, and the pair of pulleys 18 are attached to a drive plate 56 that is driven so as to be pulled upward by a cylinder 19. The winding belt 13 is wound around the winding frame 10, guide pulleys 14 a, 14 b and 15, 15,..., A drive pulley 16, and accumulator pulleys 18, 18. Tension is applied.

  The cylinder 12 is supported on the back side of the frame 52, and the piston rod 12 a of the cylinder 12 is connected to the movable block 55. The reel 10 is urged toward the guide pulleys 14a and 14b by the cylinder 12.

  The main frame 52 also supports rollers 45A and 45B at positions above the guide pulley 14a.

  At the upper end of the frame 52, a pair of movable rods 56, 56 supported slidably in the vertical direction, rollers 57, 57 respectively attached to the lower ends of the rods 56, 56, and the rods 56, 56 are moved in the vertical direction. A belt push-down device having a cylinder to be driven, and after the wound iron core is wound up, the rods 56 of the push-down device are displaced downward with the open / close arm 53 being rotated to the open position. Thus, the belt 13 that is in contact with the periphery of the wound core is pushed down to facilitate the removal of the wound core.

  A take-out device 60 for removing the wound iron core from the winding frame 10 is disposed below the winding device 22.

  The basic operation of this embodiment is shown in FIGS. The uncut steel strip SS supplied from the uncoiler is fed to the winding device 22 side through between the feed roller 25 and the presser roller 26 as shown in FIG. When the tip of the uncut steel strip SS reaches the cutting position of the shear 40, measurement of the length of the uncut steel strip SS is started. When the tip of the uncut steel strip SS reaches the steel strip receiving position P of the winding device as shown in FIG. 4 (B), the tip of the uncut steel strip SS is placed between the winding belt and the winding frame 10. Get involved. When the feed length of the uncut steel strip SS reaches a predetermined cut length, the shear 40 cuts the uncut steel strip SS. As a result, the first unit steel strip U1 is formed, and this unit steel strip U1 is continuously wound into the winding device. The trailing uncut steel strip SS follows the preceding unit steel strip U1 without stopping, and when the steel strip receiving position P is reached as shown in FIG. It is wound on the first unit steel strip that has already been wound. When the feed length of the uncut steel strip SS reaches a predetermined cut length, the shear 40 cuts the steel strip as shown in FIG. As a result, a second unit steel strip U2 is formed. This unit steel strip U2 continues to be wound around the unit steel strip U1, and after the winding of the unit steel strip U2 is completed, the subsequent uncut steel strip SS is wound as shown in FIG. It will be rolled up in the device. In the same manner, the uncut steel strip SS is wound into a winding device, and when the feed length of the steel strip reaches a predetermined cutting length, the steel strip is cut and unit steel strips are sequentially formed. To go. The winding device 22 is stopped when it is detected that the thickness of the wound unit steel strip has reached a predetermined value.

  In the apparatus of the present embodiment, the winding device 22 is continuously driven at a constant speed (line speed), and the feeding speed of the steel strip by the steel strip feeder and the cutting timing by the shear are controlled, and the joint portion of a predetermined structure A wound iron core having is wound.

  For example, when the wrap winding shown in FIG. 18 is performed, the operation of each unit is performed according to the timing chart shown in FIG. In FIG. 6, VB indicates a belt driving speed for driving the winding belt 13 and VF indicates a feeding speed of the steel strip by the steel strip feeder 29, that is, a feeder driving speed of the steel strip feeder 29. Vs indicates the shear shear drive speed of the shear 40. The operation in the case of the timing chart of FIG. 6 is as follows.

  The steel strip feeder 29 is activated at time To. The winding belt of the winding device 22 is driven at a predetermined belt driving speed VB. The feeder driving speed VF is controlled to be equal to the steel strip winding speed by the winding device 22. When an activation command is given to the shear at the timing Ti necessary to cut the steel strip to a predetermined cutting length, the shear is activated, and the steel strip fed by the steel strip feeder is cut at the predetermined cutting timing Ts. .

  When the wound iron core is wound by performing the wrap winding shown in FIG. 18, the cutting length L1 of the first unit steel strip U1 is the first circumferential length (the circumferential length of the outer peripheral surface of the winding frame 10) R1. And the cutting length L2 of the second unit steel strip U2 is L2 = R1 + La + 2πt. Here, La is the lapping allowance, t is the thickness of the steel strip, and 2πt is the increment of the length of the unit steel strip due to the thickness of the steel strip.

  In order to form a predetermined gap Lo between the rear end of the first unit steel strip and the front end of the second unit steel strip, the steel strip immediately after the cutting of the first unit steel strip U1 is completed. The feeder driving speed VF of the feeder is decreased by ΔV, and when it is detected that a predetermined gap Lo is formed, the feeder driving speed VF is returned to a value equal to the steel belt winding speed by the winding device 22. .

  In this specification, the operation of forming the gap Lo between the rear end of the preceding unit steel strip and the front end of the subsequent unit steel strip by lowering the feeder drive speed VF by ΔV in this way is referred to as “gap forming operation”. "

  The cutting length Ln of the third and subsequent unit steel strips is Ln = Rn-1 + 2πt + La. Here, as described above, Rn-1 is the circumference of the iron core around which the (n-1) th unit steel strip is wound from the innermost circumference. Further, every time the winding of one iron core block is finished, the operation of the steel strip feeder 29 is stopped, and the reel 10 is idled by an angle corresponding to the short sheet length Ls = Rn- (n + 1) La. The belt feeder 29 is restarted. By the idling operation of the winding frame, the angular position of the tip of the next core block is matched with the tip position of the already wound core block.

  As described above, when the wrap winding shown in FIG. 18 is performed, the steel strip feeder is stopped every time the winding of one core block is finished, and the winding frame is provided by an amount corresponding to the short sheet length Ls. By rotating idly, the operation of aligning the tip position of each core block is performed. However, when the lap bat winding shown in FIG. 17 is performed, the steel strip feeder is stopped when the winding of each core block is completed. Without causing the steel sheet to be continuously supplied to the winding device, and forming the short sheet Us with the next cutting length as the short sheet length Ls = Rn- (n + 1) La + 2πt, the tip position of each core block Adjust.

  When the bat winding shown in FIG. 19 is performed, the lap allowance La is set to 0, the cutting length Ln of the n-th unit steel strip is set to Ln = Rn-1 + 2πt, and each unit steel strip is cut. Then, the feeder driving speed VF is decreased by ΔV to perform the P operation for forming the gap Lo. Also in this case, every time the winding of one core block is completed, the operation of the steel strip feeder 29 is stopped and the winding frame 10 is idled by an angle corresponding to the short sheet length Ls = Rn- (n-1) Lo. Then, the tip position of the next core block is matched with the tip position of the already wound core block, and then the steel strip feeder 29 is restarted.

  In the wound iron core manufacturing apparatus of the present invention, the feeding of the steel strip, the cutting of the unit steel strip, and the winding of the unit steel strip are continuously performed, and the rear end of each unit steel strip and the next unit steel strip In order to wind the steel strip with a uniform gap with the tip of the steel strip, the feeder driving speed VF is controlled to be equal to the winding speed of the steel strip that changes as the winding diameter of the iron core increases. There is a need.

  In the present embodiment, the belt movement of the winding belt 13 immediately before being wound into the winding device 22 is calculated based on the output pulse generation interval of the encoder E1 in order to calculate the winding speed of the steel strip by the winding device 22. Calculate the speed. The belt moving speed is considered to be the speed Vc of the neutral surface of the belt 13 as shown in FIG. Therefore, if the belt moving speed of the belt 13 is Vc, the average thickness of the belt 13 is d, and the outer diameter of the current wound iron core is r, the bending strength of the belt is uniform as shown in FIG. Vi shown is the steel strip winding speed, and the steel strip winding speed Vi is given by the following equation.

Vi = {Vc / (r + d / 2)} * r (1)
Further, the outer diameter r of the current wound core can be obtained from the circumference Rn by the following equation.

r = Rn / 2π (2)
The feeder driving speed VF is controlled between the rear end of each unit steel strip and the front end of the next unit steel strip by controlling the rotational speed of the feed roller 25 to be equal to the steel strip winding speed V1. The gap can be made uniform.

  In an actual apparatus, since the thickness of the winding belt 13 varies depending on the belt tension, it is extremely difficult to make the feeder driving speed VF equal to the winding speed V1 of the steel strip. The feed motor 28 is controlled with this VF0 as a new feeder drive speed VF0 obtained by adding the steel belt winding differential speed ΔVi (corrected value thereof) obtained by the equation (1).

  When assembling a transformer using a wound iron core, as shown in FIG. 16, the wound iron core is formed into a rectangular shape and annealed, and then the joint of this wound iron core is opened and wound around the legs C1 and C2. And then rejoin the joint. In order to facilitate the operation of rejoining the joint portion of the wound core, it is preferable to align the tip positions of the joint portions J of the core blocks of the wound core as much as possible. For this purpose, it is preferable to align the tip positions of the iron core blocks when winding the circular wound iron core.

  Therefore, in the present invention, in order to align the tip position of the iron core block, the angular position on the reel of the tip of the first unit steel strip wound on the reel is detected from the output of the encoder E3, and the position is detected. The steel strip feeder 29 is controlled so that the angle position on the winding frame at the tip of the second and subsequent iron core blocks coincides with the tip reference angle position.

  Control for aligning the tip positions of the respective iron core blocks can be performed as follows, for example. That is, the reel count value CM1 counting the output pulse of the encoder E3 when the tip of the first unit steel strip (not yet cut) U1 passes the shear cutting position is read, and this count value is read. The angular position on the reel where CM1 is obtained is defined as the tip reference angular position.

  Actually, after the tip of the first unit steel strip passes through the cutting position of the shear, the first unit steel strip is moved after moving a distance a between the cutting position and the steel strip receiving position P of the winding device. Although it is wound around the frame, the distance a between the shear and the steel strip receiving position P is constant, so the rotation angle of the reel when the tip of the first unit steel strip U1 passes the cutting position of the shear There is no problem handling the position as the tip reference angle position. Next, the winding unit count value CM2 when the second unit steel strip (for example, the unit steel strip U3 in FIG. 18C) of each iron core block is cut is read. This corresponds to the angular position on the reel of the rear end f13 of the second unit steel strip U3 from the end of the core block B1 when the difference between the count values CM2 and CM1 (CM2−CM1) is calculated. The short sheet angle K between the rear end f13 of the second unit steel strip U3 and the position of the tip e11 of the first unit steel strip U1 (tip reference angle position) is obtained. When the lap allowance La is subtracted from the corresponding arc length, the short sheet length Ls from the rear end f14 of the iron core block B1 to the front end of the next iron core block B2 can be obtained.

If the number of pulses output by the encoder E3 during one rotation of the reel is PM, the short sheet angle K from the rear end of the second unit steel strip to the tip reference angle position from the end of the iron core block is:
K = PM- (CM2-CM1) (3)
Given in. If the short sheet length from the rear end of the square core block to the front end of the next core block is Ls, Ls is
Ls = (K / PM) (LB-La + 2.pi.t) -La (4)
Given in. Here, LB is the cutting length one block before the end of the block.

  When the lap bat winding shown in FIG. 17 is performed, after cutting the last unit steel strip U4 of the iron core block, the unit steel strip having a length corresponding to the short sheet length is cut, and this unit steel is cut. By supplying the belt as a short sheet to the winding device, the tip position of each core block can be adjusted to the tip reference angle position.

  When wrap winding or bat winding is performed, when the last unit steel strip U4 of the iron core block is cut, feeding by the steel strip feeder is stopped by an amount corresponding to the short sheet length Ls. By rotating idly, the tip position of each core block can be adjusted to the tip reference angular position.

  When the wound core is wound while determining the tip position of each core block as described above, the core is wound with the position of the tip of each core block aligned in the radial direction of the wound core. Although this may be sufficient, in order to improve workability at the time of fitting the winding, as shown in FIG. 15, a straight line OO connecting the center of the region where the joint portion is disposed and the center of the iron core. It is preferable to wind the iron core so that the tips of the iron core blocks are aligned along a straight line O′-O ′ parallel to the axis.

  When the length Ls × α obtained by multiplying Ls obtained by the above equation (4) by a predetermined adjustment coefficient (lap position adjustment parameter) α (including 1) is used as the short seat length Ls ′, each core block The direction in which the front end positions are arranged can be appropriately changed, and by setting the value of α appropriately, a straight line O′-O parallel to the straight line connecting the center of the region where the joint portion is arranged and the center of the iron core. The iron core can be wound so that the tips of the iron core blocks line up along the line ′. Thus, when the iron core is wound so that the front end position of each core block is aligned along the straight line O′-O ′, the rear end position of each core block is a straight line O ″ − parallel to the straight line O′-O ′. It will line up along O ″. The value of the adjustment coefficient α can be determined by conducting an experiment in which the wound iron core is wound and obtaining the relationship between the distribution state of the joint and the adjustment coefficient α.

  In this embodiment, in order to control the belt motor 21, the feed motor 28, and the shear motor 41, for example, a control device 60 as shown in FIG. 3 is provided. 3 includes a main calculation unit 61, a pulse generator 62 controlled by the main calculation unit 61, a feeder control calculation unit 63, a shear control calculation unit 64, a circumference calculation unit 75, a steel strip. It comprises a thickness calculator 76, a belt movement amount calculator 77, and a belt movement speed calculator 78.

  The pulse generator 62 generates a pulse signal that gives a line speed V (belt driving speed VB, feeder driving speed VF). The pulse signal obtained from this pulse generator is a belt motor driving device 65 that drives the belt motor 21. And the feeder control calculation unit 63. The belt motor driving device 65 supplies a driving current to the belt motor 21 according to the frequency of the pulse signal generated by the pulse generator 62, and rotates the belt motor at the line speed V (belt driving speed VB).

  The main calculation unit 61 receives an output of the tip detection sensor 32, a mode change signal given by a mode change switch (not shown), and a start command signal given by a start switch such as a push button switch, etc. The pulse generator 62 is controlled so as to apply V, and the overall operation from starting to stopping of the apparatus is managed.

  The belt movement amount calculation unit 77 activates the winding device 22, the winding belt 13 is sent, the winding frame 10 rotates, and the origin detector 33 detects the origin of the winding frame 1 from the timing at which the winding frame origin is detected. The belt feed count value CB (C1) counted by the encoder E1 until it passes several times (one or several turns of the reel), and the circumference W of the reel measured in advance in the main calculation unit 61 From the above, the correction belt movement amount Dc = W / C1 per count of the winding belt immediately before being wound into the winding device is calculated. Therefore, for a certain count value CB (Cn), the correction belt movement amount Dn = Cn × Dc is calculated and output. When calculating the belt movement amount, the belt movement is measured by measuring the circumference of the winding frame against the calculation error of the belt movement amount due to wear of the roller 45A to which the rotary encoder E1 is attached and the winding belt. There is no error in calculating the quantity. Further, the belt movement amount can be calculated with high accuracy by rotating the winding frame several times.

  The circumference calculation unit 75 uses the belt movement amount Dc per count from the belt movement amount calculation unit 77 and the encoder E1 from the timing when the origin detector 33 detects the winding frame origin until the origin passes once. From the counted value CB (C1) and the new count value CB (Cx), the belt length per rotation of the winding frame, that is, the circumferential length of the winding frame R1 = Dc × C1 and the iron core wound on the winding frame The circumference Rx = Dc × Cx is calculated and output to the main calculation unit 61.

  The steel strip thickness calculation unit 76 is output from the circumference calculation unit 75, based on the circumference of the n-1 (where n is an integer of 2 or more) sheets from the innermost circumference of the wound core to be manufactured. The thickness t of the uncut steel strip SS is calculated and output to the main calculation unit 61.

  The belt movement speed calculation unit 78 calculates the belt calculation movement speed Ve = Dc / Tc from the belt movement amount Dc per count from the belt movement amount calculation unit 77 and the time Tc required for the movement.

  The feeder control calculation unit 63 includes a cutting length L of the unit steel strip calculated by the main calculation unit 61, and a line speed V (belt drive speed VB) output from the pulse generator 62 and commanded to the belt motor driving device 65. The belt movement calculation speed Ve calculated by the belt movement speed calculation unit 78 is input. The feeder control calculation unit 63 takes in a new feeder driving speed VF0 obtained by correcting the line speed V (feeder driving speed VF) output from the pulse generator 62 and commanded to the feed motor driving apparatus 66. In order to make it equal to the steel belt winding speed Vi, the steel belt winding differential speed ΔVi calculated by substituting the difference between the belt drive speed VB and the belt movement calculation speed Ve into Vc in the above equation (1). Is added to the feeder drive speed VF to calculate a new feeder drive speed VF0. This new feeder drive speed VF0 is given to the feed motor drive device 66, and the feed motor drive device 66 supplies a drive current to the feed motor 28 so as to feed the uncut steel strip SS at the feeder drive speed VF0. Thus, by giving the new feeder driving speed VF0 to the feed motor driving device 66, even if the thickness of the winding belt 13 changes depending on the tension of the belt, the feeder driving speed is made equal to the winding speed of the steel strip. be able to.

  The shear control calculation unit 64 reads the cutting length L of the unit steel strip calculated by the main calculation unit 61 and the output of the encoder E2 (the feeding length of the steel strip by the steel strip feeder) and reads the uncut steel strip SS. When the feed length is equal to a predetermined cutting length, the start timing of the shear motor 41 necessary for cutting the uncut steel strip is calculated, and the shear motor driving device 67 is calculated at the start timing. Is given a start command. The shear motor driving device 67 activates the shear motor 67 when an activation command is given. When the shear motor is activated, the steel strip is cut at a predetermined timing (a timing at which the feed length of the steel strip is exactly equal to the cutting length).

  In the control device of FIG. 3, a main calculation unit 61, a feeder control calculation unit 63, a shear control calculation unit 64, a circumference calculation unit 75, a steel strip thickness calculation unit 76, a belt movement amount calculation unit 77, and a belt movement speed calculation unit. 78 is realized by a microcomputer. 7 to 14 are flowcharts showing control algorithms when these are realized by a microcomputer. Hereinafter, specific operation examples of the embodiment will be described using these flowcharts.

  When a start button (not shown) is pressed and the start switch is closed, the main routine of FIG. 7 is executed. When the main routine is started, it is first checked whether or not the automatic operation mode is selected. If the automatic operation mode is selected, initial setting data is read. In reading of the initial data, it is selected which type of cutting is to be performed among cutting for wrap winding, cutting for wrap butt winding, and cutting for butt winding. In this embodiment, the wrap winding cutting type is Type 1, and the wrap bat winding cutting type and the butt winding cutting type are Type 2 and Type 3, respectively.

  In the initial setting, it is also selected whether or not the tip cutting is performed first. When the tip of the steel strip supplied from the uncoiler is in an inappropriate state as a unit steel strip and it is necessary to cut it, select “With tip cutting” and the tip of the steel strip is normal and cut. If there is no need for this, select “No tip cutting”. When cutting the tip, the cutting length Cs is read.

  In addition, the line speed (belt drive speed VB, feeder drive speed VF) V, the initial value of the cutting length L (length of the first unit steel strip) L1, the lapping margin La, the number of unit steel strips constituting the core block NB, the set thickness tsr of the iron core, the slowdown set value tSR, etc. are read, and the process end flag is set to “0”.

  After the initial setting is completed, the shear control routine of FIG. 8, the belt drive control routine of FIG. 9, the steel strip thickness calculation routine of FIG. 10, and the feeder control routine of FIGS. 11 to 14 are executed in parallel. Let The main routine of FIG. 7 also determines whether or not the slowdown flag Fs is set (Fs is 1). If the slowdown flag Fs is set, the oscillation of the pulse generator 62 is determined. The line speed V is decreased by decreasing the frequency, and then it is determined whether or not the process end flag FE is 1. When the process end flag FE is 1, the line speed V = 0 is set and the process is ended.

  In the shear control routine shown in FIG. 8, after moving the shear to the home position and confirming whether or not the start button is pressed, the cutting length L (initial value L1 is initially read). Next, the feeder count value CF given by the encoder E2 is read, and the feeder counter CF is compared with the cutting length L. When the difference between the cutting length L and the feed length CF reaches the set value, the shearing operation starts. It is determined that the timing is reached, and the shear is started at the shear driving speed Vs. After cutting, return the shear to the home position. After that, it waits for reading of a new cutting length L.

  In the belt drive control routine shown in FIG. 9, after confirming whether or not the start button is pressed, the belt drive speed VB is set to the line speed V, and the process end flag FE is not set to "1". After confirmation, the belt motor 21 is driven so that the belt driving speed VB is the line speed V.

  In the steel strip thickness calculation routine shown in FIG. 10, the contents of the memories M7 and M8 in the control device are first erased, and the loop count value N = 0 and the number of unit steel strips n = 1. Next, when the origin detector 33 detects the reel origin, the belt feed count value CB (Ct) at the present reel origin detection stored in the memory M7 is stored in the previous winding stored in the memory M8. The belt feed count value CB (Cp) at the time of detecting the frame origin is exchanged and stored in the memory M8. Subsequently, the current belt feed count value CB (Cn) is stored in the memory M7, and "1" is added to the loop count value N counting the loop of this routine. When N is "2" or more, the belt feed count value CB (Cd) obtained by subtracting the content of M8 from the content of M7 is stored in the memory M9, and M9.times.Dc is calculated to calculate the circumference Rn. M9 is the belt feed count value CB (Cd), and Dc is the correction belt movement amount calculated by the belt movement amount calculation unit 77. The (average) thickness t of the steel strip is calculated by (Rn -R1) / 2π · n.

  In the feeder control routine of FIG. 11, after confirming whether or not the start button has been pressed, the feed motor 28 is activated, and when “with tip cutting” is selected, the tip detection sensor 32 detects the shearing force. The feed motor 28 is rotated until the uncut steel strip SS is fed by the length Cs added to the distance Cd between the cutting positions, and then the motor 28 is stopped. Disconnect SS. Thereafter, the output pulse of the encoder E2 is counted to measure the feed length of the uncut steel strip SS by the steel strip feeder, the feeder count value CF of the feeder counter 48 is set to zero, the feed motor is restarted, and the reel 10 The winding frame count value (corresponding to the rotation angle position of the winding frame) CM counting the output pulses of the encoder E3 for detecting the rotation angle is stored in the memory M1 in the controller. The reel count value CM stored in the memory M1 corresponds to the angular position on the reel at the tip of the first unit steel strip U1.

  After starting the feed motor 28, if it is detected that "no tip cutting" is selected, the feeder count value CF is set to -Cd (distance from the tip detection sensor 32 to the shear cutting position). When CF becomes zero (when the tip of the uncut steel strip SS reaches the shear cutting position), the reel count value at that time is stored in the memory M1.

  After storing the reel count value CM in the memory M1, it waits for the shear cutting timing to be detected in the process shown at the upper end of the flowchart of FIG. 12, and when the shear cutting timing is detected, the unit "1" is added to the total cutting count value (number of unit steel strips) n that counts the total number of times the steel strip has been cut, and the count value per block nB that counts the number of unit steel strips per core block Add "1" to When nB +1 becomes equal to NB, that is, when the second steel strip from the end of each iron core block (n-1 from the beginning) is cut, the reel count value CM is set in the control device. Is stored in the memory M2. The count value CM stored in the memory M2 corresponds to the angular position on the reel 10 (winding core) at the rear end of the second unit steel strip from the end of each core block. Next, using the number of pulses PN generated by the encoder E3 and the contents of the memories M2 and M1 during one rotation of the reel, the reference point from the rear end of the second unit steel strip from the end of each core block is used. The short sheet angle K to the angle position and the arc length from the rear end of the last unit steel strip of the core block to the reference angle position of the tip are calculated as the short sheet length Ls, and the actual short circuit is multiplied by this adjustment coefficient α. The sheet length Ls' is calculated.

  After calculating the short sheet length Ls' in the flowchart shown in FIG. 13, as shown in the upper part of the flowchart in FIG. 13, the count value nB for each block is equal to the number NB of unit steel strips constituting the iron core block. If it is not equal, it is determined whether or not the total number n of cuts is 2. In the case of n = 2, it is determined whether Type is 3 (whether it is bat winding). As a result, if the bat is not wound, the cutting length of the first unit steel strip (in this embodiment, the circumferential length of the winding frame) L1 plus the lap allowance La becomes a new L1, and then this L1 The cutting length L2 of the second unit steel strip U2 is calculated by adding 2πt of the cutting length increase due to the thickness of the steel strip.

  As a result of determining whether or not the total number n of cuts is 2, if n = 2 (second unit steel strip) is not satisfied, the cutting length Ln-1 of the (n−1) th unit steel strip = Rn-1 + 2πt is calculated. After calculating the cutting length Ln of the n-th unit steel strip, a new feeder driving speed VF0 is calculated as a function of Ln, and then the gap forming operation routine shown in FIG. 14 is performed.

  If it is determined that nB = NB in the process at the upper end of the flowchart of FIG. 13, then it is determined whether Type is 2 (whether it is lap bat winding), and Type is In the case of 2 (when the wrap bat is wound), the gap forming operation routine shown in FIG. 14 is performed with the short sheet length Ls as the cutting length Ln.

  If Type is not 2 (lap winding or bat winding), the feeder is stopped and the difference between the belt feed count value CB and the feeder count value CF for counting the output pulses of the encoder E1 is calculated. Then, the data is stored in the memory M3 in the control device, and when the content of the memory becomes equal to the short sheet length Ls, the feed motor is rotated again. Then, after calculating the cutting length Ln-1 = Rn-1 + 2πt of the (n-1) th unit steel strip, a new feeder driving speed VF0 is calculated as a function of Ln, and the gap forming operation shown in FIG. Move to routine.

  In the gap forming operation routine shown in FIG. 14, it is first determined whether or not n = 2 (whether or not the next unit steel strip to be cut is the second unit steel strip), and n = 2. In this case, ΔV is subtracted from the feeder driving speed VF to reduce the rotational speed of the feed motor regardless of the Type, and the feeder driving speed VF is lowered by ΔV. Next, the feeder count value (feed length of the uncut steel strip SS) CF and the belt feed count value CB are stored in the memories M4 and M5, respectively, and the contents obtained by subtracting the contents of M4 from the contents of M5 are stored in the memory M6. The stored contents of the memory M6 correspond to the gap length between the rear end of the preceding unit steel strip and the front end of the subsequent unit steel strip. When the content of the memory M6 is compared with the set gap length Lo and the content of the memory M6 exceeds the gap length Lo, ΔV is added to the feeder drive speed VF to restore the feeder drive speed, and FIG. Return to the routine. That is, in this process, the feeder drive speed VF is decreased by ΔV to form a gap length Lo set between the rear end of the preceding unit steel strip U1 and the front end of the subsequent unit steel strip U2.

  In the process shown in the upper end of FIG. 14, if it is determined that n = 2 is not satisfied, it is subsequently determined whether Type is 3 or not, and if the result is 3 (in the case of bat winding). In some cases, as in the case of n = 2, the feeder driving speed VF is decreased by ΔV, and the gap between the rear end of the preceding unit steel strip Un-1 and the front end of the subsequent unit steel strip Un A gap length Lo set to be formed. If it is determined that n = 2 is not satisfied and Type is determined not to be 3 (in the case of wrap winding or wrap bat winding), the routine returns to the routine of FIG. 13 without doing anything.

  After the gap forming operation routine shown in FIG. 14 is performed, the process shown in the lower end of FIG. 13 is performed, the feeder driving speed VF is set to a new feeder driving speed VF0, and the cutting length Ln of the unit steel strip is set to the cutting length L. Then, the process returns to the process shown at the upper end of the flowchart of FIG.

  In the above embodiment, the unit steel strip length calculating means is realized by the process of calculating the cutting length Ln of the unit steel strip in the flowchart shown in FIG. 13, and the steel strip length measuring means is realized by the encoder E2 and the feeder counter 48. Is done.

 In the flowchart of FIG. 14, it was determined whether n = 2 and Type = 3, and it was detected that the cut steel strip was the second unit steel strip. In this case, and when the winding method is butt winding, the gap formation command generation means is realized by the process of shifting the feeder driving speed VF to the process of decreasing by ΔV. In FIG. 14, after VF−ΔV is set to VF, VF + ΔV The gap forming feeder control means is realized by the process up to setting VF.

  Further, the tip reference angular position detecting means is realized by the process shown at the lower end of FIG. 11, and the short sheet length calculating means is realized by the process shown at the lower end of FIG. Further, the block tip alignment means is realized by the process from stopping the feeder in FIG. 13 to rotating the feeder again.

  In the above embodiment, when the tip of the first unit steel strip passes through the cutting position of the shear, the reel count value CM is read, and the angle of the tip of the first unit steel strip on the reel By detecting the position and reading the reel count value when the cutting of the second unit steel strip from the end of each iron core block is completed, on the reel at the rear end of this second unit steel strip However, the method of detecting the angular position of the front end or the rear end of these unit steel strips is not limited to this method.

  For example, reading the reel count value at the time when the tip of the first unit steel strip passes the shear cutting position plus the time required for the steel strip to reach the steel strip receiving position of the winding device Is used to detect the angular position of the tip of the first unit steel strip, and at the time when the cutting of the second unit steel strip from the end of the iron core block is completed, this unit steel strip becomes the steel strip receiving position of the winding device. The angular position of the rear end of the second sheet from the last of each iron core block may be detected by reading the reel count value at the time when the time required to reach is added.

  In addition, a sensor for detecting the end of the unit steel strip is arranged at the steel strip receiving position of the winding device, and the first sheet is read by reading the reel count value when this sensor performs the detection operation. You may make it detect the angle position of the front-end | tip of this unit steel strip, and the angular position of the rear end of the 2nd unit steel strip from the last of each iron core block.

  The shear 40 may be a stop cut shear or a flying shear. The drive source is a shear motor, but air may be used.

It is the block diagram which showed schematically the structure of embodiment of this invention. It is the front view which showed the specific structure of the machine part of embodiment of this invention. 1 is a block diagram schematically showing an electrical configuration of an embodiment of the present invention. (A) thru | or (F) is explanatory drawing which showed the operation state from which the principal part of embodiment of this invention differs, respectively in operation | movement order. It is explanatory drawing explaining the method of calculating the winding speed of a steel strip. It is a timing chart for demonstrating operation | movement of embodiment of this invention. It is the flowchart which showed the main routine of the program used when each function implementation | achievement means is implement | achieved by the microcomputer in embodiment of this invention. It is the flowchart which showed the shear control routine of the program used when each function realization means is implement | achieved by the microcomputer in embodiment of this invention. It is the flowchart which showed the belt drive control routine of the program used when each function implementation | achievement means is implement | achieved by the microcomputer in embodiment of this invention. It is the flowchart which showed the steel strip thickness calculation routine of the program used when each function implementation | achievement means is implement | achieved by the microcomputer in embodiment of this invention. It is the flowchart which showed a part of the feeder control routine of the program used when each function implementation means is implement | achieved by the microcomputer in embodiment of this invention. It is the flowchart which showed the other part of the feeder control routine of the program used when each function implementation | achievement means is implement | achieved by the microcomputer in embodiment of this invention. It is the flowchart which showed the further another part of the feeder control routine of the program used when each function implementation | achievement means is implement | achieved by the microcomputer in embodiment of this invention. It is the flowchart which showed the part which performs the gap formation operation | movement of the feeder control routine of the program used when each function implementation | achievement means is implement | achieved by the microcomputer in embodiment of this invention. It is the front view which showed roughly an example of the wound iron core manufactured with the apparatus of this invention. It is the front view which showed the wound iron core obtained by shape | molding the iron core of FIG. 15 in a rectangular shape. (A) thru | or (E) is explanatory drawing which showed the method of formation of the junction part in the case of manufacturing a wound iron core by performing lap bat winding. (A) thru | or (C) is explanatory drawing which showed the method of formation of the junction part in the case of manufacturing a wound iron core by lapping. It is explanatory drawing which shows the structure of the junction part of the wound iron core manufactured by performing bat winding.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Winding frame 11 Guide apparatus 13 Winding belt 21 Belt motor 22 Winding apparatus 23 Winding core 25 Feed roller 28 Feed motor 29 Steel strip feeder 40 Shear 75 Circumference length calculation part 76 Steel band thickness calculation part 77 Belt movement amount calculation part 78 Belt movement speed calculation section E1, E2, E3 Encoder SS Uncut steel strip Un Unit steel strip Us Short sheet

Claims (6)

A wound core manufacturing apparatus for manufacturing a wound core having a structure in which a plurality of core blocks each made of a plurality of unit steel strips having both ends wrapped with a predetermined lap allowance La are stacked,
An endless winding belt driven by a belt motor as a driving source and a winding frame driven to rotate by the winding belt, and the uncut steel strip supplied to the steel strip receiving position as the winding belt A winding device for winding a steel strip around the winding frame by winding between the winding frame,
A steel strip feeder that feeds an uncut steel strip toward the steel strip receiving position by a feed roller that is rotationally driven using a feed motor as a drive source;
Belt movement amount calculating means for calculating the movement amount of the winding belt immediately before being wound into the winding device;
Based on the movement amount of the winding belt, the belt length per rotation of the winding frame is calculated, and the belt length is set as the peripheral length of the winding frame and the peripheral length of the iron core wound around the winding frame. Means,
The thickness of the uncut steel strip is output from the circumference calculation means based on the circumference of the n-1 (where n is an integer of 2 or more) sheets from the innermost circumference of the wound core to be manufactured. steel strip thickness calculating means for calculating t;
The length of one turn of the winding surface extending around the inner circumference of the n-1st unit steel strip from the innermost circumference of the wound core to be manufactured is the n-1st unit. The peripheral length Rn-1 of the iron core around which the steel strip is wound corresponds to the peripheral length Rn-1 plus the length increase 2πt due to the thickness t of the uncut steel strip and the lapping allowance La. Unit steel strip length calculating means for calculating the length as the cutting length Ln of the unit steel strip constituting the core block at the nth position from the innermost circumference of the wound core;
Steel strip length measuring means for measuring the feed length of the uncut steel strip fed by the steel strip feeder,
The feed length of the uncut steel strip disposed between the steel strip feeder and the winding device and measured by the steel strip length measuring means is the cutting length calculated by the unit steel strip length calculating means. When equal, a shear that forms a unit steel strip by cutting without stopping the uncut steel strip fed by the steel strip feeder,
Feeder control means for controlling the steel strip feeder so that the feeder driving speed of the steel strip feeder matches the winding speed of the steel strip by a winding device;
When it is necessary to form a gap between the rear end of the preceding unit steel strip being wound on the winding device and the front end of the subsequent unit steel strip to be wound, A gap formation command generating means for generating a gap formation command immediately after detecting that the unit steel strip has been cut;
For gap formation that controls the steel strip feeder to change the feeding speed of the uncut steel strip constituting the subsequent unit steel strip until the gap is formed when the gap formation command is generated Feeder control means;
A tip reference angular position detection means for detecting an angular position on the tip of the first unit steel strip wound on the winding frame as a tip reference angular position;
Short sheet length calculating means for calculating the arc length from the rear end of the last unit steel strip of each core block to the tip reference angle position measured in the winding direction of the steel strip as the short sheet length Ls; When the last unit steel strip is cut, the feeding of the steel strip by the steel strip feeder is temporarily stopped and the winding frame is rotated by a rotation angle corresponding to the short sheet length Ls, and then the steel strip feeder. An operation of controlling the steel strip feeder so as to resume feeding of the steel strip, and after the last unit steel strip of the iron core block is cut, the short sheet length Ls is given to the shear as a cutting length and the short A block tip alignment means for selectively performing an operation of continuously winding the steel strip equal to the sheet length around the outer periphery of the iron core block without stopping. A wound iron core manufacturing device. A wound core manufacturing apparatus for manufacturing a wound core having a structure in which a plurality of core blocks each made of a plurality of unit steel strips having both ends wrapped with a predetermined lap allowance La are stacked,
An endless winding belt driven by a belt motor as a drive source and a winding frame driven to rotate by the winding belt, and the steel strip supplied to the steel strip receiving position is used as the winding belt and the winding frame. A winding device for winding a steel strip around the winding frame by winding between
A steel strip feeder that feeds an uncut steel strip toward the steel strip receiving position by a feed roller that is rotationally driven using a feed motor as a drive source;
Belt movement amount calculating means for calculating the movement amount of the winding belt immediately before being wound into the winding device;
Based on the movement amount of the winding belt, the belt length per rotation of the winding frame is calculated, and the belt length is set as the peripheral length of the winding frame and the peripheral length of the iron core wound around the winding frame. Means,
The thickness of the uncut steel strip is output from the circumference calculation means based on the circumference of the n-1 (where n is an integer of 2 or more) sheets from the innermost circumference of the wound core to be manufactured. steel strip thickness calculating means for calculating t;
The length of one turn of the winding surface extending around the inner circumference of the n-1st unit steel strip from the innermost circumference of the wound core to be manufactured is the n-1st unit. The peripheral length Rn-1 of the iron core around which the steel strip is wound corresponds to the peripheral length Rn-1 plus the length increase 2πt due to the thickness t of the uncut steel strip and the lapping allowance La. Unit steel strip length calculating means for calculating the length as the cutting length Ln of the unit steel strip constituting the core block at the nth position from the innermost circumference of the wound core;
Steel strip length measuring means for measuring the feed length of the uncut steel strip fed by the steel strip feeder,
The feed length of the uncut steel strip disposed between the steel strip feeder and the winding device and measured by the steel strip length measuring means is the cutting length calculated by the unit steel strip length calculating means. When equal, a shear that forms a unit steel strip by cutting without stopping the uncut steel strip fed by the steel strip feeder,
Feeder control means for controlling the steel strip feeder so that the feeder driving speed of the steel strip feeder matches the winding speed of the steel strip by a winding device;
When it is necessary to form a gap between the rear end of the preceding unit steel strip being wound on the winding device and the front end of the subsequent unit steel strip to be wound, A gap formation command generating means for generating a gap formation command immediately after detecting that the unit steel strip has been cut;
For gap formation that controls the steel strip feeder to change the feeding speed of the uncut steel strip constituting the subsequent unit steel strip until the gap is formed when the gap formation command is generated Feeder control means;
A tip reference angular position detection means for detecting an angular position on the tip of the first unit steel strip wound on the winding frame as a tip reference angular position;
The length obtained by multiplying the arc length from the rear end of the last unit steel strip of each core block to the tip reference angle position measured in the winding direction of the steel strip by a predetermined adjustment coefficient is calculated as the short sheet length Ls ′. Short sheet length calculation means;
When the last unit steel strip of the iron core block is cut, the feeding of the steel strip by the steel strip feeder is temporarily stopped, and the winding frame is rotated by a rotation angle corresponding to the short sheet length Ls ′. The steel strip feeder is controlled to resume feeding of the steel strip by the steel strip feeder, and the short sheet length Ls ′ is used as the cutting length after the last unit steel strip of the iron core block is cut. And a block tip aligning means for selectively performing the operation of continuously winding the steel strip equal to the short sheet length around the outer periphery of the core block without stopping. apparatus. A wound core manufacturing apparatus for manufacturing a wound core having a structure in which a plurality of core blocks made of a plurality of unit steel strips laminated at both ends in a state of zero lap is laminated,
An endless winding belt driven by a belt motor as a drive source and a winding frame driven to rotate by the winding belt, and the steel strip supplied to the steel strip receiving position is used as the winding belt and the winding frame. A winding device for winding a steel strip around the winding frame by winding between
A steel strip feeder that feeds an uncut steel strip toward the steel strip receiving position by a feed roller that is rotationally driven using a feed motor as a drive source;
Belt movement amount calculating means for calculating the movement amount of the winding belt immediately before being wound into the winding device;
Based on the movement amount of the winding belt, the belt length per rotation of the winding frame is calculated, and the belt length is set as the peripheral length of the winding frame and the peripheral length of the iron core wound around the winding frame. Means,
The thickness of the uncut steel strip is output from the circumference calculation means based on the circumference of the n-1 (where n is an integer of 2 or more) sheets from the innermost circumference of the wound core to be manufactured. steel strip thickness calculating means for calculating t;
The length of one turn of the winding surface extending around the inner circumference of the n-1st unit steel strip from the innermost circumference of the wound core to be manufactured is the n-1st unit. The length corresponding to the peripheral length Rn-1 of the iron core around which the steel strip is wound and the increase in length 2πt due to the thickness t of the uncut steel strip is added to the peripheral length Rn-1. A unit steel strip length calculating means for calculating the cutting length Ln of the unit steel strip constituting the core block at the nth position from the innermost periphery of the core;
Steel strip length measuring means for measuring the feed length of the uncut steel strip fed by the steel strip feeder,
The feed length of the uncut steel strip disposed between the steel strip feeder and the winding device and measured by the steel strip length measuring means is the cutting length calculated by the unit steel strip length calculating means. When equal, a shear that forms a unit steel strip by cutting without stopping the uncut steel strip fed by the steel strip feeder,
Feeder control means for controlling the steel strip feeder so that the feeder driving speed of the steel strip feeder matches the winding speed of the steel strip by a winding device;
When it is necessary to form a gap between the rear end of the preceding unit steel strip being wound on the winding device and the front end of the subsequent unit steel strip to be wound, A gap formation command generating means for generating a gap formation command immediately after detecting that the unit steel strip has been cut;
For gap formation that controls the steel strip feeder to change the feeding speed of the uncut steel strip constituting the subsequent unit steel strip until the gap is formed when the gap formation command is generated Feeder control means;
A tip reference angular position detecting unit that detects an angular position on the tip of the first unit steel strip wound on the winding as a tip reference angular position;
Short sheet length calculating means for calculating the arc length from the rear end of the last unit steel strip of each core block to the tip reference angle position measured in the winding direction of the steel strip as the short sheet length Ls; When the last unit steel strip is cut, the feeding of the steel strip by the steel strip feeder is temporarily stopped and the winding frame is rotated by a rotation angle corresponding to the short sheet length Ls, and then the steel strip feeder. An operation of controlling the steel strip feeder so as to resume feeding of the steel strip, and after the last unit steel strip of the iron core block is cut, the short sheet length Ls is given to the shear as a cutting length and the short A block tip alignment means for selectively performing an operation of continuously winding the steel strip equal to the sheet length around the outer periphery of the iron core block without stopping. A wound iron core manufacturing device. A wound core manufacturing apparatus for manufacturing a wound core having a structure in which a plurality of core blocks made of a plurality of unit steel strips laminated at both ends in a state of zero lap is laminated,
An endless winding belt driven by a belt motor as a drive source and a winding frame driven to rotate by the winding belt, and the steel strip supplied to the steel strip receiving position is used as the winding belt and the winding frame. A winding device for winding a steel strip around the winding frame by winding between
A steel strip feeder that feeds an uncut steel strip toward the steel strip receiving position by a feed roller that is rotationally driven using a feed motor as a drive source;
Belt movement amount calculating means for calculating the movement amount of the winding belt immediately before being wound into the winding device;
Based on the movement amount of the winding belt, the belt length per rotation of the winding frame is calculated, and the belt length is set as the peripheral length of the winding frame and the peripheral length of the iron core wound around the winding frame. Means,
The thickness of the uncut steel strip is output from the circumference calculation means based on the circumference of the n-1 (where n is an integer of 2 or more) sheets from the innermost circumference of the wound core to be manufactured. steel strip thickness calculating means for calculating t;
The length of one turn of the winding surface extending around the inner circumference of the n-1st unit steel strip from the innermost circumference of the wound core to be manufactured is the n-1st unit. The length corresponding to the peripheral length Rn-1 of the iron core around which the steel strip is wound and the increase in length 2πt due to the thickness t of the uncut steel strip is added to the peripheral length Rn-1. A unit steel strip length calculating means for calculating the cutting length Ln of the unit steel strip constituting the core block at the nth position from the innermost periphery of the core;
Steel strip length measuring means for measuring the feed length of the uncut steel strip fed by the steel strip feeder,
The feed length of the uncut steel strip disposed between the steel strip feeder and the winding device and measured by the steel strip length measuring means is the cutting length calculated by the unit steel strip length calculating means. When equal, a shear that forms a unit steel strip by cutting without stopping the uncut steel strip fed by the steel strip feeder,
Feeder control means for controlling the steel strip feeder so that the feeder driving speed of the steel strip feeder matches the winding speed of the steel strip by a winding device;
When it is necessary to form a gap between the rear end of the preceding unit steel strip being wound on the winding device and the front end of the subsequent unit steel strip to be wound, A gap formation command generating means for generating a gap formation command immediately after detecting that the unit steel strip has been cut;
For gap formation to control the steel strip feeder so as to reduce the feeding speed of the uncut steel strip constituting the subsequent unit steel strip until the gap is formed when the gap formation command is generated Feeder control means;
A tip reference angular position detection means for detecting an angular position on the tip of the first unit steel strip wound on the winding frame as a tip reference angular position;
The length obtained by multiplying the arc length from the rear end of the last unit steel strip of each core block to the tip reference angle position measured in the winding direction of the steel strip by a predetermined adjustment coefficient is calculated as the short sheet length Ls ′. Short sheet length calculation means;
When the last unit steel strip of the iron core block is cut, the feeding of the steel strip by the steel strip feeder is temporarily stopped, and the winding frame is rotated by a rotation angle corresponding to the short sheet length Ls ′. The steel strip feeder is controlled to resume feeding of the steel strip by the steel strip feeder, and the short sheet length Ls ′ is used as the cutting length after the last unit steel strip of the iron core block is cut. And a block tip aligning means for selectively performing the operation of continuously winding the steel strip equal to the short sheet length around the outer periphery of the core block without stopping. apparatus. The feeder control means
Belt movement amount calculating means for calculating the movement amount of the winding belt immediately before being wound into the winding device;
Belt moving speed calculating means for calculating a belt calculating moving speed based on the moving amount of the winding belt;
Using the belt driving speed commanded to drive the belt motor and the belt calculation speed as inputs, a new feeder driving speed corrected for the feeder driving speed commanded to drive the feed motor, In order to equalize the winding speed of the steel strip by the winding device, the winding differential speed of the steel strip calculated based on the difference between the belt driving speed and the belt calculation movement speed is added to the feeder driving speed. A feeder control calculating means for calculating the new feeder driving speed,
The iron core manufacturing apparatus according to claim 1, wherein the feed motor is driven at the new feeder driving speed.   The belt movement amount calculating means drives the winding belt before cutting the first uncut steel strip and rotates the winding frame several times to obtain the belt movement length measured in advance. The iron core manufacturing apparatus according to any one of claims 1 to 5, wherein the correction belt movement amount is calculated by correction according to claim 1.

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