JP2016210530A - Wire take-up device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire take-up device which flatly takes up each layer in an automated manner without being affected by a dimension of a used bobbin, change of a feed speed of the wire, and change of a rotation speed of the bobbin.SOLUTION: A wire take-up device includes: rotating means 12 of a bobbin 11; a traverser 14 of the bobbin 11; a distance sensor 20 which measures a winding radius r of a wire 17; a storage device 22 which stores the winding radius r measured by the distance sensor 20; and control means 23 which calculates an inversion position of the traverser of the bobbin 11 on the basis of the winding radius r stored in the storage device 22. The distance sensor 20 is positioned between an entry position of the wire 17 and a flange 21.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wire rod winding device that winds a wire rod on a cylindrical bobbin having flanges at both ends.

  Conventionally, a wire rod winding device that winds a wire rod on a cylindrical bobbin having flanges at both ends has been used. In the wire winding device, the wires are aligned and wound one layer at a time. When the winding of one layer is completed, the wire of the next layer is further wound thereon. This is repeated, and the wire is laminated in multiple layers and wound.

  When winding the wire, in order to accurately determine the winding position of the wire, the wire travels along the groove of the guide pulley. In a wire winding device, the bobbin rotation axis is often horizontal. Therefore, the following description will be made assuming that the rotation axis of the bobbin is horizontal. When the rotation axis of the bobbin is vertical, “horizontal” is read as “vertical”, and “left and right” are read as “up and down”. When the rotation axis of the bobbin is horizontal, the bobbin is continuously moved to the left or right while winding the wire. There is also a type of wire winding device in which the guide pulley and the wire move left and right without the bobbin moving left and right. The bobbin moving pitch when the bobbin rotates once is usually larger than the diameter of the wire in order to wind up the wire so as not to overlap.

  For example, when winding a certain layer, the wire rod is wound from the right end flange to the left end flange while moving the bobbin in the right direction. When the winding of this layer is finished, the bobbin moving direction is reversed to the left, and the next layer is wound from the left end flange to the right end flange. The wire is laminated in an aligned state on the previously wound layer. When the winding of this layer is completed, the bobbin moving direction is reversed again to the right, and the wire is wound from the right end flange to the left end flange.

  A device for reciprocating the bobbin or wire is called “traverser”, a reciprocating distance of the bobbin or wire is called “traverse width”, and reversing the moving direction of the bobbin or wire is called “reversing the traverser”.

  Bobbins are usually made of plastic or metal. Since there are many types of bobbins and various sizes, it is necessary to determine the traverse width according to each bobbin.

  If the wire rod is wound around the bobbin while the reverse position of the traverser is fixed, the winding amount near the flange may be excessive (called “thickening”), or conversely, it may be too small (called “thinning”). Sometimes. When winding thickening or thinning occurs, each layer of the wire becomes not flat. The fact that each layer of the laminated wire is not flat is called “the winding state of the wire is broken”.

  If the winding state of the wire is broken, the winding radius of the wire varies, and the wire cannot be fed out accurately. In such a case, in order to hinder the use of the wire in the subsequent process, the winding state of the wire is required to be flat for each layer.

  Conventionally, since the wire is wound so that each layer is flat, the operator visually observes the winding state and appropriately corrects the reverse position of the traverser or detects the flange position by a sensor or the like to detect the reverse position of the traverser. Some corrections have been made.

  In Patent Document 1 (Japanese Patent Laid-Open No. 5-8934), when the optical sensor detects a flange, the traverser is reversed. According to this technique, the wire rod can be wound up to the vicinity of the flange without being affected by variations in the flange position and bobbin mounting errors. However, the time lag from the detection of the flange to the reversal of the traverser cannot be ignored, and the winding radius may increase (thicken up) near the flange due to variations in the time lag. Further, it is necessary to correct the thickening and thinning that occur during winding.

  In Patent Document 2 (Japanese Patent Laid-Open No. 7-33326), the optical sensor detects the flange of the winding bobbin and controls to reverse the traverser after a predetermined time. According to this technique, the wire can be wound up without being affected by the length of the bobbin body. However, when the traverser moves at a constant speed, the winding pitch of the wire cannot be taken up due to a change in the winding radius. In order to make the wire winding pitch constant, the traverser moving speed must be changed according to the wire winding radius and feed speed. Furthermore, the wire cannot be wound up flatly unless the optical sensor detects the flange of the winding bobbin at the same time as the traverser moving speed is changed and the time until the traverser is reversed is calculated.

  In Patent Document 3 (Japanese Patent Laid-Open No. 6-115810), the difference between the winding outer diameter at the center of the bobbin and the winding outer diameter near the flange is obtained, and the reverse position of the traverser is corrected according to the difference. According to this method, the reverse position of the traverser can be determined regardless of the bobbin size and the bobbin outer shape.

  This method does not take into account the effects of wear of the traverser pulley and fluctuations in the rotational speed of the bobbin. In the fixed abrasive type saw wire, the influence of the wear of the pulley groove is large, and it is difficult to increase the accuracy of the calculation of the reverse position of the traverser. Moreover, since the winding outer diameter is calculated only at one place when the sensor detects the flange, even if there is an abnormality in the winding outer diameter at other places, it cannot be detected.

JP-A-5-8934 Japanese Patent Laid-Open No. 7-33326 JP-A-6-115810

  The object of the present invention is that each layer is automatically wound flatly without being affected by the dimensions of the bobbin used, and without being affected by changes in the wire feed speed or bobbin rotation speed. It is to provide a wire winding device.

(1) The wire winding device of the present invention is a wire winding device that winds a wire around a cylindrical bobbin having flanges at both ends. The wire winding device of the present invention includes the following.
・ Rotating means for rotating the bobbin ・ Traverser for moving the wire rod entry position or the bobbin parallel to the rotation axis of the bobbin ・ Distance sensor for measuring the winding radius of the wire rod ・ Memory for storing the winding radius measured by the distance sensor The control means distance sensor for calculating the approach position of the wire rod or the reverse position of the traverser of the bobbin based on the winding radius stored in the device / storage device is located between the wire rod entry position and the flange.
The “wire entry position” is a position where the wire comes into contact with the bobbin or the wire already wound around the bobbin when the wire is wound around the bobbin.

  (2) In the wire rod winding device of the present invention, when the flange approaches the wire entry position, the distance sensor detects the flange before the flange reaches the wire entry position.

  (3) In the wire winding device of the present invention, the reverse position of the traverser is set based on the winding radius when the distance sensor detects the flange.

  (4) In the wire winding device of the present invention, the reverse position of the traverser is set based on three or more winding radii stored in the storage device.

  (5) In the wire rod winding device of the present invention, the reversing position of the traverser is corrected each time the bobbin or the wire rod traverser is reversed.

  (6) In the wire winding device of the present invention, the wire is a wire having abrasive grains fixed on its surface.

  According to the present invention, even when the dimensions of the bobbin to be used are different, the winding state of each layer of the wire rod can be automatically maintained flat. In addition, even if the wire feed speed changes due to wear of the guide pulley or changes in the rotation speed of the bobbin during winding, the measurement of the winding radius is not affected, so that the winding state does not collapse.

Main part block diagram of wire winding device of the present invention Explanatory drawing of traverse width control in the wire winding device of the present invention (when winding is flat) Explanatory drawing of traverse width control in the wire winding device of the present invention (when winding thicker) Explanatory drawing of traverse width control in the wire winding device of the present invention (when winding)

  The present invention is a wire winding device that winds a wire around a cylindrical bobbin having flanges at both ends, and is particularly characterized in controlling the reverse position of the traverser. Examples of the wire include a metal wire, a wire rope (metal stranded wire), an electric wire, an optical fiber, a metal pipe, a resin wire, a resin pipe, a thread, and a rope. However, the wire is not limited to these.

  When the wire is a saw wire with a diameter of about 100 μm, which is used in a wire saw, and the abrasive grains are fixed to the surface, there is no slip between the wires because the abrasive particles of the adjacent wire are caught, and the traverser is not reversed accurately. And the wire cannot be wound flat. Also, the saw wire has abrasive grains fixed on its surface, the guide pulley wears quickly, and the groove shape varies greatly. Therefore, it is difficult to obtain the linear velocity and the winding distance from the rotation speed of the guide pulley, and to accurately calculate the winding radius based on the linear velocity and the winding distance. The present invention is particularly suitable for wires that are difficult to wind, such as saw wires.

  FIG. 1 shows an example of the wire winding device of the present invention. The wire winding device 10 includes a rotating means 12 that rotates the bobbin 11 around its rotation shaft 13, and a traverser 14 that moves the bobbin 11 in a direction parallel to the rotation shaft 13. The bobbin 11 is detachably attached to the wire winding device 10. The dimensions of the bobbin 11 are, for example, a winding part of the wire 17 having a diameter of 100 mm, a flange 21 having a diameter of 150 mm, and a winding part having a length of 200 mm. However, the size of the bobbin 11 is not limited to this. In addition, the broken line in FIG. 1 shows a signal line. The wire 17 is sent out with a constant tension from a wire feeding device (not shown).

  An example of the rotating means 12 of the bobbin 11 is an electric motor. It is desirable that the electric motor for rotating the bobbin 11 is provided with an encoder 24 for detecting the rotation angle so that the rotation speed of the electric motor can be controlled precisely.

  The traverser 14 of the bobbin 11 includes, for example, a means 15 for mounting the bobbin 11 and the rotating means 12 and reciprocating the bobbin 11 in parallel with the rotating shaft 13 of the bobbin 11 and a pulse motor 16 that can be moved precisely by a ball screw 25. Combinations are listed. A servo motor can be used in place of the pulse motor 16. Instead of the combination of the pulse motor 16 and the ball screw 25, a linear pulse motor or a linear servo motor can be used. However, the traverser 14 of the bobbin 11 is not limited to these.

  When winding the wire 17 around the bobbin 11, the wire 17 travels while being guided by the groove of the guide pulley 18 in order to accurately set the entry position of the wire 17. Although the bobbin 11 moves in parallel in the wire rod winding device 10 in FIG. 1, the guide pulley 18 and the wire 17 may move in parallel instead of the bobbin 11.

  The wire winding device 10 of the present invention includes a distance sensor 20. The distance sensor 20 measures the distance l from the zero point to the layer 19 on the surface of the wire 17 wound from the outer point of the flange 21 of the winding bobbin as a reference (zero point). The “winding radius r” in this specification is obtained by a value obtained by subtracting the distance l from the outer peripheral diameter L of the flange 21 of the winding bobbin to the layer 19 on the surface of the wound wire rod 17.

  It is desirable that one distance sensor 20 be provided on each of the left and right sides of the wire 17. The left distance sensor 20 (L) is used to control the reversal of the traverser when the left flange 21 approaches the entry position of the wire 17. The right distance sensor 20 (R) is used to control the reversal of the traverser when the right flange 21 approaches the entry position of the wire 17. The distance LO between the entry position of the wire rod 17 and the left distance sensor 20 (L) is referred to as a left offset amount, and the distance RO between the entry position of the wire rod 17 and the right distance sensor 20 (R) is referred to as a right offset amount.

  The distance sensor 20 sequentially measures the winding radius r of the wire 17 at a plurality of locations in the direction of the rotation axis 13 of the bobbin 11. Although the measurement interval of the winding radius r can be set freely, it is desirable to measure the winding radius r for each rotation of the bobbin 11 (each time the traverser of the bobbin 11 advances one pitch).

  Examples of the distance sensor 20 include a laser displacement sensor and an ultrasonic proximity sensor. However, the distance sensor 20 is not limited to these.

  The distance sensor 20 is preferably provided at a position between the entry position of the wire 17 and the flange 21. This is because it is desirable for traverser control that the distance sensor 20 detects the flange 21 before the flange 21 reaches the entry position of the wire 17.

  For example, since the distance sensor 20 measures the winding radius r every time the traverser of the bobbin 11 advances by one pitch, the winding radius r is obtained one after another. Therefore, for example, the latest 16 locations of the winding radius r are stored in the storage device 22. When the distance sensor 20 detects the flange 21, the latest stored winding radius r (15 winding radii r1 to r15 excluding the position closest to the flange 21) is used for traverser control described later.

  As for detection of the flange 21, a value slightly smaller than the radius of the flange 21 is set as a threshold value, and a portion where the value measured by the distance sensor 20 exceeds the threshold value is recognized as the flange 21.

  In the wire rod winding device 10, the reverse position of the traverser is changed by the control means 23 based on the winding radii r1 to r15 of the wire rod 17 stored in the storage device 22. Next, the traverser is reversed at the reversal position designated by the control means 23.

  As an example, a traverser control method for the wire rod winding device 10 including the left distance sensor 20 (L) and the right distance sensor 20 (R) shown in FIG. 2 will be described. In FIG. 2, the bobbin 11 moves to the right while winding the wire 17. In FIG. 2, the left distance sensor 20 (L) is used for controlling the traverser. The distance sensor 20 (R) on the right side is not used for controlling the traverser when the bobbin 11 is moving in the right direction. However, when the bobbin 11 is moving leftward, the right distance sensor 20 (R) is used for traverser control (the same applies to FIGS. 3 and 4 described later).

  FIG. 2 shows the moment when the bobbin 11 moves in the right direction and the left distance sensor 20 (L) detects the left flange 21. The 15 winding radii r measured by the distance sensor 20 (L) in the past closest to this moment and stored (the latest 15 winding radii r1 to r15) are used to control the traverser. It is done.

  The winding radius r0 when detecting the flange 21 is the radius of the flange 21 and is excluded because it is not the winding radius. The average value of the five winding radii r1 to r5 from the side close to the flange 21 is defined as “the average value of the winding radius r on the flange side”. Further, the average value of the ten winding radii r6 to r15 on the far side from the flange 21 is defined as “the average value of the central winding radii r”.

  The average of the winding radii r1 to r5 on the flange side is a, and the average value of the winding radii r6 to r15 on the center side is b. If the value of (ab) is equal to or greater than the set roll-thickness threshold value, this means roll-thickness, and the traverse width is narrowed (the reverse position of the traverser is moved away from the flange 21). If the value of (ab) is between the set thickening and thinning threshold values, the traverse width is not changed (the reverse position of the traverser is not changed). Further, if the value of (a−b) is equal to or less than the set thinning threshold, this is thinning, and the traverse width is widened (the reverse position of the traverser is brought closer to the flange 21).

  When the bobbin 11 is moving in the right direction, the reverse position of the traverser is the position where the bobbin 11 is further moved by the left offset amount LO after the left distance sensor 20 (L) detects the left flange 21. It is in. This means that the traverser is reversed at the position where the wire 17 enters the left flange 21. When the bobbin 11 is moving leftward, the reverse position of the traverser is the position where the bobbin 11 is further moved by the right offset amount RO after the right distance sensor 20 (R) detects the right flange 21. It is. This means that the traverser is reversed at the position where the wire 17 enters the right flange 21.

  In FIG. 2, the winding state of the wire 17 is not collapsed near the flange 21 (the state in which there is neither thickening nor thinning), and the winding radius r is constant, so the value of (ab) is set. Within the threshold range. Therefore, the reverse position of the traverser is not changed.

  In FIG. 3, the winding state of the wire 17 is collapsed near the left flange 21, and the winding radius r of the wire 17 is increased near the flange 21 (winding thickening occurs). In such a case, if the wire 17 is further wound around the thickened portion near the flange 21, the thickening will not be solved forever. Therefore, the traverser is controlled as follows to eliminate the thickening.

  FIG. 3 shows the moment when the bobbin 11 moves in the right direction and the left distance sensor 20 (L) detects the left flange 21. As described with reference to FIG. 2, an average value of five winding radii r1 to r5 on the side close to the flange 21 (an average value of the winding radii r1 to r5 on the flange side) is a. Further, an average value of 10 winding radii r6 to r15 on the side far from the flange 21 (an average value of the winding radius r on the center side) is b.

  In the case of FIG. 3, since the winding radius r is large near the flange 21 (winding thickening has occurred), the value of (ab) is equal to or greater than the set threshold value. Therefore, the reverse position of the traverser is changed so that the traverse width is narrowed.

  The position X where the traverse is reversed when the roll over is occurring may be set in advance based on experience. In this case, the reverse position X is fixed. Alternatively, the inversion position X may be changed according to the value of (a−b). In this case, the inversion position X is variable. In order to keep the winding state of the wire 17 flat, it is desirable to make the inversion position X variable.

  By controlling the traverser in this way, it is possible to quickly correct the state of thickening of the wire 17 near the left flange 21. Furthermore, it is desirable to correct the reverse position X of the traverser for each traverse of the bobbin 11 in order to quickly and accurately correct the winding state.

  In FIG. 4, the winding state of the wire 17 is broken near the left flange 21, and the winding radius r of the wire 17 is small near the flange 21 (winding is generated). In such a case, the traverser is controlled as follows to reduce the winding.

  In the case of FIG. 4, since the winding radius r is small near the flange 21, the value of (ab) is equal to or less than the set threshold value. Therefore, the reverse position of the traverser is changed so that the traverse width is widened.

  The position at which the traverser is inverted when winding is generated may be set in advance based on experience. In this case, the inversion position is fixed. Alternatively, the inversion position may be changed according to the value of (a−b). In order to make the winding state of the wire 17 flat, it is desirable to make the inversion position variable.

  In the wire winding device of the present invention, flat winding with no collapse of the winding state is automatically realized by controlling the traverser described above.

  The wire winding device of the present invention is widely used for winding all kinds of wires, for example, metal wires, wire ropes (metal stranded wires), electric wires, optical fibers, metal pipes, resin wires, resin pipes, yarns, ropes and the like. .

DESCRIPTION OF SYMBOLS 10 Wire rod winding device 11 Bobbin 12 Bobbin rotating means 13 Bobbin rotating shaft 14 Traverser 15 Reciprocating means 16 Pulse motor 17 Wire rod 18 Guide pulley 19 Surface layer 20 Distance sensor 21 Flange 22 Storage device 23 Pulse motor control means 24 Encoder 25 Ball screw

Claims (6)

A wire rod winding device for winding a wire rod on a cylindrical bobbin having flanges at both ends,
Rotating means for rotating the bobbin;
A traverser for moving the entry position of the wire rod or the bobbin parallel to the rotation axis of the bobbin;
A distance sensor for measuring the winding radius of the wire;
A storage device for storing the winding radius measured by the distance sensor;
Control means for calculating the approach position of the wire rod or the reverse position of the traverser of the bobbin based on the winding radius stored in the storage device,
The distance sensor is a wire winding device located at a position between the entry position of the wire and the flange.   The wire winding device according to claim 1, wherein when the flange approaches the entry position of the wire, the flange is detected by the distance sensor before the flange reaches the entry position of the wire.   The wire rod winding device according to claim 1 or 2, wherein a reversing position of the traverser is set based on the winding radius when the distance sensor detects the flange.   The wire rod winding device according to any one of claims 1 to 3, wherein a reversal position of the traverser is set based on three or more winding radii stored in the storage device.   The wire rod winding device according to any one of claims 1 to 4, wherein a reversing position of the traverser is corrected each time the bobbin or the traverser of the wire rod is reversed.   The wire rod winding device according to any one of claims 1 to 5, wherein the wire rod is a wire rod having abrasive grains fixed on a surface thereof.

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