JP2002153915A - Coil straightening device, and detector of outside diameter of coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the outside diameter of a coil under operation with high accuracy in a sensorless configuration, and to automatically adjust the correction according to the change in the outside diameter of the coil with excellent accuracy in a facility for correcting a strip uncoiled from the coil by an uncoiler using a leveler feeder, and feeding it. SOLUTION: There is provided a means for controlling the leveler feeder (for example, a sequencer 101) so that the present value of the outside diameter of the coil is operated step by step based on the initial value of the preset outside diameter of the coil, the thickness of the strip, the uncoiling length of the strip (for example, the feed length in the leveler feeder), the optimum correction corresponding to the present value of the outside diameter of the coil is operated step by step, and the correction in the leveler feeder becomes constantly optimum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straightening device for improving the flatness of a belt-shaped material unwound from a coil material, and in particular, automatically and highly accurately adjusting the amount of correction in accordance with the coil outer diameter. The present invention relates to a straightening device to be realized and a device for detecting a coil outer diameter which is optimal for such an application.

[0002]

2. Description of the Related Art Generally, in a processing step in which a thin strip material (strip material) made of steel, aluminum, or the like is continuously supplied to a press machine or the like to perform a pressing process or a cutting process, the strip material is coiled. The coiled material (that is, the coil material) is rotated in the unwinding direction, and the belt material is fed out from the outer periphery thereof at any time (that is, the belt material is unwound from the coil material and supplied), and the press machine is used. In the pre-stream, etc., the web is straightened by passing the web through the web. Conventionally, such a device for correcting a strip is arranged in two rows in a staggered manner in the direction in which the strip is inserted, and alternately pressed against one side and the other side of the inserted strip to form a strip. There is known an apparatus called a leveler provided with a plurality of straightening rolls for bending a sheet in a longitudinal direction in a wavy manner.

[0003] The state of the winding habit of the strip material unwound from the coil material differs depending on the outer diameter of the coil material.
In general, as the unwinding of the band material advances and the outer diameter of the coil material decreases, the winding habit worsens (the flatness decreases). In the above-mentioned leveler, the accuracy of the flatness after the correction is reduced due to the influence of the change in the winding habit, so if the accuracy is pursued, it is necessary to adjust the correction amount according to the change in the coil outer diameter. The adjustment of the correction amount has been conventionally performed manually. That is, for example, corresponding to the maximum diameter Da, the intermediate diameter Db, and the minimum diameter Dc of the coil material as shown in FIG. 4B, the correction amounts are Pa, Pb, and Pc as shown in FIG. Generally, it is necessary to increase such correction by visually confirming the outer diameter of the coil and manually operating the handle for adjusting the correction amount provided on the leveler by a human operator. Had been
Here, the correction amount is the degree to which the belt-like material is curved in a wave shape, in other words, the degree of engagement between the correction roll arranged on one side of the belt-like material and the correction roll arranged on the other side. (Depth). This correction amount is adjusted by, for example, displacing the position of the correction rolls arranged on one surface side in a direction perpendicular to the belt-shaped material (that is, in a direction of moving forward and backward with respect to the correction rolls arranged on the other surface side). Conventionally, a mechanism (correction amount adjustment mechanism) for realizing such displacement has been driven by the above-described handle operation.

[0004]

However, in the above-mentioned conventional correction apparatus, since the correction amount is adjusted by a human operation as described above, there is a problem that the operator is troublesome. In particular, when trying to achieve high-precision adjustment, the coil outer diameter changes every moment,
The adjustment operation of the correction amount must be performed frequently, and the operator needs to be clear of the operating correction device. In addition, if the number of adjustment points is reduced in order to reduce the labor of the adjustment operation, high-precision adjustment cannot be performed, and sufficient flatness may not be obtained. That is, for example, when the adjustment operation is performed only at three points as shown in FIG. 4B, a three-step step-like adjustment result is obtained as shown by a dashed line in FIG. 4A. Actually, however, the error becomes large with respect to the ideal characteristic that changes continuously as shown by the solid line in FIG.

Accordingly, the applicant has filed Japanese Patent Application No. 10-24104.
No. 5 proposed a device for automatically adjusting the correction amount by detecting the coil outer diameter by a sensor. According to this device, it is possible to realize a highly accurate adjustment of the correction amount according to the coil outer diameter, and furthermore, it is possible to obtain an excellent advantage that the operator is completely released from the adjustment operation during the operation of the correction device. However, the above-described apparatus has the following problems in terms of cost, higher accuracy, and the like. That is, since the coil outer diameter is detected by the sensor, there is a problem that the cost of the apparatus increases accordingly. In particular, if more accurate detection of the coil outer diameter is required to achieve a more accurate correction, extremely expensive sensors (high-resolution encoders, non-contact ultrasonic sensors, etc.) will be required, and costs will be reduced. Was a major obstacle. On the other hand, if an inexpensive sensor (for example, an encoder with a low resolution) is used to reduce the cost, a high resolution for detecting the coil outer diameter cannot be obtained, and the detection accuracy of the coil outer diameter can be improved (and thus the correction accuracy can be improved). Improvement) was limited.

[0006] In addition, the encoder detects the swing of a so-called coil press (a member for preventing unnecessary unraveling of the coil material by contacting a roll at the tip with the outer peripheral surface of the coil material) and detecting the swing of the coil press. In the case of a configuration in which the outer diameter of the coil material is detected from the swing angle, it is necessary to always hold the coil, and it is necessary to always contact the coil outer surface with the coil during operation. For this reason, even if the original function of the coil presser is unnecessary, there is a disadvantage that the device cost increases by the amount of the coil presser. Further, when the coil material is a soft material or a mirror surface material, the outer peripheral surface is unnecessarily pressed and damaged. There is a risk that it will. By the way, in the case of thin materials or soft materials, there is no fear that the coil material will be unwound, so there is no need to hold the coil. (Or at least a configuration in which the coil presser is retracted during operation) is preferable. Accordingly, the present invention provides a coil material straightening device that detects a coil outer diameter in a sensorless configuration and enables automatic adjustment of a correction amount according to the coil outer diameter with high accuracy and at low cost, and such applications. It is an object of the present invention to provide a coil outer diameter detecting device that is most suitable for the device.

[0007]

In order to achieve the above object, a coil material straightening device according to the present invention is a coil material straightening device for improving the flatness of a strip material unwound from a coil material, A straightening unit that straightens the band-shaped material in a wavy manner in the longitudinal direction, a straightening amount adjusting mechanism that adjusts the straightening amount in the straightening unit, and a preset initial value of a coil outer diameter of the coil material, which is set in advance. Based on the plate thickness of the strip material and the unwind length of the strip material,
While sequentially calculating the current value of the coil outer diameter, the correction amount corresponding to the current value of the coil outer diameter is sequentially determined from the preset reference value of the coil outer diameter and the reference value of the correction amount corresponding thereto. And a control unit for controlling the correction amount adjusting mechanism such that the correction amount in the correction unit is the correction amount calculated by the calculation unit. That is, the correction device of the present invention obtains the coil outer diameter that changes every moment by calculation without using a sensor, and automatically adjusts the correction amount according to the obtained coil outer diameter. Here, “the unwinding length of the strip” is
This is the length of the unwound strip from the state where the coil outer diameter is the initial value, and the unwinding strip is fed to the downstream equipment (press machine etc.) via the straightening device in the feeding operation. It can be interpreted as length. In addition, it is preferable that the “unwinding length of the band-shaped material” is detected by an existing sensor. For example, a feeder for feeding a strip-shaped material called a feeder is provided on a line on which this type of straightening device is installed (recently, the straightening device and the feeder are often integrated). A sensor for feedback-controlling the feed speed and feed length of the material (for example, an encoder for detecting the position of a servomotor for driving and controlling the feed mechanism of the strip material) is usually provided. Can be used to detect the "unwinding length of the band-shaped material" without increasing the cost.

According to a preferred aspect of the present invention, in the straightening device according to the second aspect, the straightening portions are arranged in two rows in a staggered manner in the insertion direction of the band material, and one surface of the band material inserted. Side and the other side alternately pressed against each other, comprising a plurality of straightening rolls for straightening the band-shaped material in a wavy manner in the longitudinal direction, wherein the straightening amount adjustment mechanism is the band-shaped material of the plurality of straightening rolls. A support member that supports the one-side straightening rolls arranged on one surface side, and the inlet side and the outlet side in the insertion direction of the support member can be individually displaced in a direction orthogonal to the strip material. The correction means comprises a possible driving means, and the displacement amounts of the support member on the inlet side and the outlet side are separately calculated and controlled by the calculating means and the control means as the correction amount. That is, the straightening device according to the second aspect automatically adjusts the degree of engagement of the straightening rolls (that is, the amount of straightening) separately on the entrance side and the exit side of the strip.

[0009] Further, the coil outer diameter detecting device of the present invention comprises:
4. A coil outer diameter detecting device for sequentially detecting a coil outer diameter of a coil material that decreases in accordance with an operation of unwinding a belt-like material from a coil material, wherein the coil outer diameter is set in advance. Calculating means for sequentially calculating the current value of the coil outer diameter based on an initial value of the coil outer diameter of the material, a preset thickness of the band-shaped material, and an unwinding length of the band-shaped material. It is characterized by.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the equipment of the present example in which the coil material is unwound, corrected, and sent out,
FIG. 2 is a plan view of the facility. FIG. 3 is a block diagram showing a main control system of the facility. This equipment is shown in Fig. 1.
As shown in FIG. 2, an uncoiler 10 for unwinding the strip 2 from the coil 1 and a leveler feeder 20 for correcting the unwind strip 2 and sending it to the right in the drawing.
And Note that the leveler feeder 20 is an integrated unit of a so-called leveler (correction device) and a feeder (feeding device). In general, the entire facility including the uncoiler may be referred to as a leveler feeder.

First, the uncoiler 10 will be described.
The uncoiler 10 includes a gantry 11, a mandrel 12 provided in a cantilevered manner with respect to the gantry 11, a motor (not shown) for driving the mandrel 12 to rotate, a coil retainer 13, a loop guide 14 and the like. Here, the mandrel 12 is shown in FIGS.
As shown in FIG. 5, a rotating shaft 12a supported by a plurality of bearings (not shown) with respect to the gantry 11 and rotatable around its central axis, and a portion of the rotating shaft 12a overhanging from the gantry 11 are enclosed. And a plurality (three in this case) of drum members 12b arranged in the circumferential direction. The outer peripheral surface of these drum members 12b has the coil material 1
(Shown by a two-dot chain line in FIG. 1) is formed into an arcuate shape along the inner peripheral surface of the coil material 1 and is pressed against the inner peripheral surface of the coil material 1 to generate a sufficient frictional force, thereby forming the coil material 1. It is for holding in the mounted state. For this purpose, each of the drum members 12b is supported on the rotating shaft 12a by a supporting mechanism (not shown) combining a parallel link and a slider crank mechanism, for example.
Is movable in the radial direction with respect to (i.e., as a whole, it expands and contracts). Note that a gap S that is always greater than or equal to a certain value is always present between the adjacent drum members 12b, and a coil such as a rope that suspends the coil material 1 (used at the time of attaching / detaching the coil material 1) by using this gap. It is configured to be detachable from the material 1.

A motor for rotating and driving the mandrel 12 is disposed in the upper part of the gantry 11, and is normally driven at a constant speed during operation by controlling a sequencer 101 (shown in FIG. 3) described later. Next, the coil presser 13 is an arm-shaped member whose base end is swingably attached to the gantry 11, and a roll 13 a rotatably attached to the distal end of the coil presser 13 contacts the upper outer peripheral surface of the coil material 1. It is accessible. In the present example, the roll 13a is only temporarily pressed against the coil material 1 during the setting operation of the coil material 1 (operation preparation stage), and is held at a retracted position away from the coil material 1 during operation. Is done. Also,
The swing angle of the coil retainer 13 can be detected by an encoder 13b provided at the base end of the coil retainer 13. In this case, the encoder 13b performs an operation for automatically measuring an initial value of an outer diameter (a radius may be used) of the coil material 1 after setting the coil material 1 (hereinafter, referred to as a coil outer diameter teaching operation). This is unnecessary when such a coil outer diameter teaching operation is not performed. 2 is a cylinder (for example, an air cylinder) for driving the coil presser 13, and this cylinder operates as follows under the control of, for example, a sequencer 101 described later. That is,
When an operation of pressing the coil material 1 is instructed by an operation panel 40, which will be described later, by an operator, for example, to cut a coil band (not shown) of the coil material 1 attached to the mandrel 12, the sequencer 101 will operate. When the cylinder 15 is operated in the direction in which the roll 13a of the coil presser 13 is pressed against the coil material 1, and the release of the operation of pressing the coil material 1 is commanded, the cylinder 15 is operated in the reverse direction to operate the coil presser 13. Return to the predetermined evacuation position. Further, when the operation of the coil outer diameter teaching operation is instructed by an operation panel 40 described later, the sequencer 10
1 operates the cylinder 15 in the direction of pressing the roll 13a of the coil presser 13 against the coil material 1, and for example, until the movement of the coil presser 13 started from a predetermined retracted position stops (that is, the roll 13a After counting the number of output pulses of the encoder 13b), the cylinder 15 is operated in the reverse direction to return the coil presser 13 to the predetermined retracted position. At this time, in the sequencer 101, the number of output pulses counted (ie,
The initial value of the outer diameter of the coil material 1 (for example, the initial value R of the radius) is calculated from the detection data corresponding to the swing angle of the coil presser 13).
0) is calculated and stored.

Next, the loop guide 14 is an arc-shaped member which is swingably attached to the gantry 11 and guides the band-shaped material 2 at the time of a passing work to be described later. It swings so as to move forward and backward with respect to the lower surface side. In FIG. 1, a cylinder 16 drives the loop guide 14. The cylinder 16 of the loop guide 14 operates as follows, for example, by controlling the sequencer 101 based on an operation of an operation panel 40 described later. That is, when the tip of the strip-shaped material 1 is bent through the nose after being mounted and inserted into the leveler feeder 20, the loop guide 14 is driven in a direction approaching the lower surface of the coil material 1, and the loop guide 14 is driven. Strip 1
Is guided toward the entrance of the leveler feeder 20. When the operation of inserting the strip 2 into the leveler feeder 20 (so-called sheet passing operation) is completed and the setting operation of the coil material 1 is completed, the loop guide 14 is driven in a direction away from the lower surface of the coil material 1 and the loop guide 14 is moved.
Is maintained at a position retracted from the strip 2. Here, “nose bending” is an operation of bending the tip of the band-shaped material 2 curved by the winding habit of the coil material 1 in a reverse direction so as to be easily inserted into the leveler feeder 20.

Next, the leveler feeder 20 will be described. The leveler feeder 20 includes a pinch roll 21, a plurality of straightening rolls 22 a and 22 b, and a pair of feed rolls 23 a and 2 arranged in order along the passage of the strip 2.
3b and a correction amount adjusting mechanism 24 for adjusting the correction amount by the correction rolls 22a and 22b are arranged above the gantry 25, and include a passing plate mechanism 30, an operation panel 40, and the like as auxiliary devices.

Here, the pinch roll 21 is rotatably provided at the entrance of the band-shaped material 2, and particularly when the sheet passing operation is performed.
The belt-shaped material 2 is sandwiched between the straightening rolls 22a and 22 so as to face a threading roll 32a of a passing mechanism 30 described later.
The guide 2 guides the band 2 toward b. Next, the straightening rolls 22a and 22b are arranged in two rows in a zigzag manner in the inserting direction of the band-shaped material, and each is rotatable. The straightening rolls 22a and 22b are provided on one side and the other side of the inserted band-shaped material 2 respectively. These rolls are alternately pressed against each other to bend and correct the belt-shaped material 2 in a wavy manner in the longitudinal direction, and constitute a straightening unit of the present invention. Note that the straightening roll 22a is a straightening roll on the upper surface side (a straightening roll on one side) that is in pressure contact with the upper surface side of the belt-shaped material 2, and the straightening roll 22b is a lower surface side that is in pressure contact with the lower surface side of the belt-shaped material 2. This is a straightening roll (a straightening roll on the other side). FIG. 1 shows a configuration example in which six correction rolls 22a on the upper surface side are installed and five correction rolls 22b on the lower surface side are arranged. In this case, the axis of the lower-side correction roll 22b is fixed to the gantry 25 in this case, while the axis of the upper-side correction roll 22a is supported by a support member 25 described later.
Can be moved in parallel in the vertical direction perpendicular to the band-shaped material 2 with the displacement. Next, the feed rolls 23a, 23
b is a component as a feeder that feeds the strip 2 to downstream equipment (for example, a press machine), and at least one of the rolls is a servomotor 23c (see FIGS. 2 to 3) with the strip 2 sandwiched. Shown).
In FIG. 2 and FIG. 3, what is indicated by reference numeral 23d is an encoder (pulse generator) attached to the servo motor 23c for detecting the rotational position of the servo motor 23c.

Next, the correction amount adjusting mechanism 24 includes a support member 25 for rotatably supporting the upper correction roller 22a, and an inlet side and an outlet side of the support member 25 (left end side and right end side in FIG. 1). ) Can be individually displaced in directions perpendicular to the strip 2 (up and down directions in FIG. 1). This correction amount adjusting mechanism 24
In this case, the eccentric shafts 26a and 26b supporting the left and right ends of the support member 25 and the eccentric shafts 26a and 26
Motors 27a and 27 for rotating and driving the motors 6b separately.
b etc. Here, the eccentric shafts 26a and 26b are, for example, rotatably supported at both ends thereof (not shown) with respect to the gantry 25, and have inner portions eccentric to the both ends formed on both left and right sides of the support member 25. The eccentric shafts 2 are slidably inserted into the through holes, respectively.
The rotation of 6a and 26b causes the same action as the cam to cause the inlet side and the outlet side (left end side and right end side) of the support member 25 to move up and down independently.

In this case, the motors 27a and 27b are induction motors with a gear box for deceleration, and the rotation output of the induction motors is controlled by a rotation transmitting means having a deceleration function such as a worm gear (not shown). 26
a, 26b are further decelerated and transmitted. The specific parameter adjusted as the correction amount in this example is the amount of vertical displacement of the support member 25. As the support member 25 is displaced downward, the correction amount (ie, the upper surface side) is adjusted. Straightening roll 22
a is engaged with the correction roll 22b on the lower surface side). The amount of displacement of the support member 25 in the vertical direction (that is, the amount of correction) is separately adjusted for the entrance side and the exit side of the strip 2 as described above. Hereinafter, a portion of the correction amount adjustment mechanism 24 (excluding the motors 27a and 27b) that adjusts the displacement amount of the support member 25 on the entrance side is referred to as an entrance-side correction amount adjustment mechanism, and is denoted by reference numeral 24a in FIG. . Similarly, a portion of the correction amount adjustment mechanism 24 that adjusts the displacement amount of the support member 25 on the outlet side is referred to as an outlet side correction amount adjustment mechanism.
4b. In FIG. 3, reference numerals 28a and 28b denote detection means for detecting the amount of correction (i.e., the amount of displacement of the support member 25 on the inlet side or the outlet side) by each of the correction amount adjusting mechanisms 24a and 24b. In this case, specifically, an encoder that generates a pulse signal by inputting rotation of the worm gear or the like described above, for example, is used.

Next, the passing plate mechanism 30 includes a guide portion 31 and
Threading arm 32 and threading arm 3
2 for driving the second cylinder. Guide part 31
Is the entrance of the leveler feeder 20 (that is, the pinch roll 2
1 is located at a position along the lower surface side of the strip 2 to be introduced into the entrance of the leveler feeder 20. Roll 31a which rotates while contacting the lower surface of the
(Shown in FIG. 2). Threading arm 3
Reference numeral 2 denotes a pair of arm-shaped members that are swingably attached to both sides of the guide portion 31, and a threading roll 32a is rotatably attached between the distal ends of the pair of arm-shaped members. This threading roll 3
2a is attached in parallel to the strip 2 (also to the above-mentioned pinch roll 21 and the straightening rolls 22a and 22b), and the base end side of the threading arm 32 is driven by the cylinder 33, and the threading arm 32
When the leading end of the pinch roller 32 swings toward the inside of the leveler feeder 20, the threading roll 32a comes into contact with the upper surface of the pinch roll 21 in parallel.
In addition, the threading arm 32 serves to bend the tip of the strip 2 with such a configuration and guide the tip of the strip 2 to the entrance of the leveler feeder 20. used. The operation of the cylinder 33 for driving the threading arm 32 is also realized by controlling the sequencer 101 based on the operation of the operation panel 40, for example.

Next, the operation panel 40 is an operation section which is attached to the frame 25 of the leveler feeder 20 in this case, and is electrically connected to a sequencer 101 which will be described later. (For example, a touch panel display) is provided on the upper surface thereof. The manual operation of the threading arm 32 described above, various data setting operations, and the like can be easily performed from the operation panel 40. The data set by the operator in advance from the operation panel 40 to a sequencer 101 to be described later includes a periodic feed amount of the band-shaped material 2 (a band-shaped material for one cycle operation of, for example, a press machine as a downstream equipment). In addition to the basic data such as the transmission length when sending 2 at a predetermined timing, there are the following in this case.
That is, in order to automatically adjust the correction amount, the sheet thickness T of the strip 2 constituting the coil material 1, the coil outer diameter and the reference value of the correction amount (for example, the three points of the coil outside shown in FIG. 4). It is necessary to input at least the diameter and the correction amount data) in advance. Note that, in order to automatically adjust the correction amount in this example, the initial value of the coil outer diameter needs to be set in the sequencer 101. In this case, this data is set by the above-described coil outer diameter teaching operation. You.

Next, regarding the control system of the equipment of this embodiment,
This will be described with reference to FIG. As shown in FIG. 3, the control system of this equipment is configured around a control unit 100. In this case, the control unit 100 is incorporated below the gantry 11 of the uncoiler 10, and includes a sequencer 101, a positioning unit 102, a drive unit 103,
Inverters 104 and 105 are provided. Sequencer 10
Reference numeral 1 denotes an apparatus for performing a control process according to a set program in response to an operation signal (or setting data) from the operation panel 40. In operation, the apparatus 1 sends the band-shaped material 2 by a predetermined amount at a predetermined timing. Downstream equipment (for example,
While reading the synchronization signal from the press machine), it generates a signal or data for instructing the target rotation position of the servomotor 23c and outputs (or writes) it to the positioning unit 102, and also outputs the inverter 104, 1
By controlling the motors 24a and 27b via the controller 05, the operation of adjusting the correction amount by each of the correction amount adjusting mechanisms 24a and 24b is controlled.

The sequencer 101 has an operation panel 4
In addition to appropriately receiving the operation signal from 0, outputs a signal for controlling the display unit and the like of the operation panel 40, and also outputs the encoders 28a and 28 of the correction amount adjustment mechanisms 24a and 24b.
Read the output of b. In addition, the sequencer 101 receives, via an interface (not shown), a synchronization signal (for example, a signal of an absolute encoder that detects the rotational position of a crankshaft of the press machine) from a downstream equipment (for example, a press machine). Is entered. Although not shown, the signal of the encoder 13b of the coil retainer 13 is also input to the sequencer 101 in this case. The sequencer 101 also sends these actuators to the above-described drive circuits (not shown) for the cylinders 15, 16, and 33 and the drive circuit (not shown) for driving the mandrel 12 as necessary. It is configured to output a signal for control.

The positioning unit 102 determines the speed of the servo motor 23c based on the position command signal (or written data) transmitted from the sequencer 101 and the output signal (signal as position feedback) of the encoder 23d. The drive unit 103 is a unit that generates a command, and is a unit that drives the servomotor 23c based on the speed command output from the positioning unit 102 and an output signal (signal as speed feedback) of the encoder 23d. According to the positioning unit 102 and the drive unit 103, the servomotor 23c is driven so that the rotational position or speed deviation (difference between the command value and the feedback value) of the servomotor 23c always approaches zero. 2 is accurately sent out by a set periodic feed amount at a predetermined timing synchronized with the operation of the downstream equipment. The output signal of the encoder 23d may be input to the positioning unit 102 via the drive unit 103 or may be input to the positioning unit 1 as shown by a two-dot chain line in FIG.
02 may be directly input. Further, in this case, the positioning unit 102 sends the data of the actual feed length of the strip 2 based on the output signal of the encoder 23d (data capable of detecting the cumulative value of the feed length of the strip 2) to a sufficiently short sampling period. Is output to the sequencer 101 (or read by the sequencer 101).

The sequencer 101 performs, for example, every time a predetermined unit-amount feeding operation of the strip 2 is executed based on the above-mentioned feeding length data provided from the positioning unit 102 (or The control process for automatically adjusting the correction amount is repeatedly executed as described below (with a preset sufficiently short execution cycle), and functions as the calculation means and control means of the present invention. That is, first, the initial value R0 of the coil outer diameter (for example, the radius) preset by the above-described coil outer diameter teaching operation, and the feed length of the belt-shaped material 2 sent out from the time when the coil material 1 was set until that time The current value R of the coil outer diameter at that time is obtained based on the total value L of the thickness and the plate thickness T set in advance by the setting operation of the operator. As shown in FIG. 5 (a), the calculation formula for this calculation is such that the side area of the coil material 1 is reduced by the side area of the unwound strip 2 and the outer diameter is reduced accordingly. It is easily determined by taking into account the progress.
That is, the reduction in the side area of the coil material 1 can be easily obtained by modifying the equation (for example, the following equation (1)) obtained as being equal to the side area of the unwound strip 2. π · R0 ² -π · R ² = L · T (1) Note that, as the feed length L of the band-shaped material 2, the accumulated value from the initial state (the set state of the coil material 1) is not used and the previous value is used. Using the feed length after calculation, the initial value of the coil outer diameter R0
It is needless to say that the coil outer diameter obtained in the previous calculation may be used instead of (this aspect is naturally included in the concept of the present invention).

Next, the sequencer 101 separately obtains the ideal correction amount P corresponding to the current value R of the coil outer diameter obtained by the above calculation for the above-described inlet side and outlet side in this case. The ideal correction amount P is obtained, for example, as follows. That is, by the processing operation of the sequencer 101, for example, from the reference point of the correction amount set as shown in FIG. 4A, the ideal characteristic (interpolation between the coil outer diameter and the ideal correction amount) obtained by interpolating between these reference points is obtained. Relationship) is specified in advance by a function or the like, and is easily obtained by performing an operation of substituting the obtained current value R of the coil outer diameter into the function thus set. And sequencer 101
Are the correction amount adjusting mechanisms 24a and 24b on the inlet side and the outlet side, respectively.
Is the ideal correction amount P obtained as described above.
Based on the output signals (feedback signals) of the encoders 28a and 28b, the inverter 10
A process for performing feedback control of each of the motors 27a and 27b via the fourth and the fourth 105 is executed. That is, the encoder 28
The motors 27a and 27b are driven such that the difference (deviation) between the current value of the correction amount detected by the output signals a and 28b and the correction amount P as the target value always approaches zero.

In the equipment described above, the coil outer diameter during operation, which changes every moment, is calculated sequentially in real time without using a sensor. Based on the calculation result of the coil outer diameter, automatic adjustment of the correction amount of the leveler is performed. Be executed. For this reason,
It is not necessary to provide at least an expensive sensor for detecting the outer diameter of the coil during operation, and the cost can be reduced accordingly.
Further, since it is not necessary to press the roll 13a of the coil presser 13 against the coil material 1 during operation, there is no possibility that the coil material 1 is damaged by the roll 13a.
In addition, since the outer diameter of the coil during operation can be detected with extremely high accuracy, the automatic adjustment of the correction amount of the leveler can be more precisely and accurately realized. That is, since the configuration is such that the coil outer diameter during operation is sequentially calculated from the feed length of the band-shaped material 2, the resolution for detecting a change in the coil outer diameter is remarkably improved, and the correction amount is adjusted more frequently. This is because it can be executed in a detailed manner. For example, as described above, when the coil outer diameter is detected by the output of the encoder that detects the swing angle of the coil presser, the angle change of the coil presser for a certain amount of feeding of the strip 2 is extremely small. Correspondingly, the number of output pulses of the encoder for a fixed amount of feed of the strip 2 (that is, the resolution for detecting the coil outer diameter) is extremely small. On the other hand, if the configuration is such that the coil outer diameter is calculated from the data of the feed length of the strip 2, even a slight change in the coil outer diameter can be detected, and the resolution is significantly improved. In particular, if data obtained from the encoder 23d for servo control of the feeder of the strip 2 is used as data of the feed length of the strip 2 as in the present embodiment, this type of encoder usually has a higher resolution. Since a high-performance one is used, the resolution of the coil outer diameter detection (and the accuracy of the automatic adjustment of the correction amount) can be significantly improved.

In this embodiment, since the correction amount can be separately adjusted and controlled on the entrance side and the exit side of the band-shaped material 2 in the leveler, the adjustment of the correction amount according to the coil outer diameter can be performed more efficiently. Quality is possible. This is because it is generally preferable that the correction amount at the leveler is large on the entrance side and smaller on the exit side. Further, in order to maintain the flatness of the strip 2 more favorably, it is necessary to slightly increase the correction amount particularly on the outlet side as the coil outer diameter decreases (the correction amount on the inlet side is rather small). It should not be changed) has been found by the inventors' research. If the correction amount can be separately adjusted on the inlet side and the outlet side according to the coil outer diameter as in the present embodiment, the adjustment of the optimum correction amount different on the inlet side and the outlet side can be finely realized. It is possible.

As described above, if the coil outer diameter during operation, which changes every moment, can be detected with high accuracy in real time, it contributes to cost reduction of equipment and high accuracy of automatic adjustment of the correction amount in the leveler. In addition to the effects that can be obtained, the following practical advantages can be obtained. That is, it is possible to accurately display the remaining amount of the coil material 1 (notify the worker) and to contribute to improvement of convenience. Further, the expanding force of the mandrel 12 (drum member 12b) in the uncoiler 10 is
Control for optimal adjustment according to the coil outer diameter can be performed with high accuracy, and a problem caused by the improper expansion force can be accurately avoided. That is, as described above, the gap S is formed between the drum members 12b of the mandrel 12, as shown in FIG. Therefore, particularly when the remaining amount of the coil material 1 decreases, the portion of the belt-shaped material 2 constituting the coil material 1 that is located in the gap S is in a state of linearly stretching, and the end of the drum member 12b In the portion X, the band-shaped material 2 is bent, and in some cases, this bending may remain as harmful damage to the band-shaped material 2. Therefore, the expanding force of the mandrel 12 (the coil material 1)
Of the coil material 1 must always be minimized, especially in the direction of decrease in accordance with the decrease in the outer diameter of the coil material 1. However, as described above, the coil outer diameter is detected with high accuracy. If possible, such adjustments can be made accurately.

It should be noted that the present invention is not limited to the embodiments described above, but may have various modifications and applications. For example, it is not always necessary to provide an encoder for detecting the coil presser and the swing angle of the coil presser. For example, if the coil material to be handled is thin and there is no risk of unwinding naturally, there is no need to hold down the coil material with the coil holder when cutting the coil band. The initial value of the coil outer diameter is
The present invention is not limited to the mode in which the measurement is automatically performed by the coil outer diameter teaching operation as in the above-described embodiment, but may be a configuration in which an operator actually measures and inputs the data (in this case, an encoder that detects the swing angle of the coil presser) Is unnecessary.) Also, the present invention can be applied to equipment in which a leveler and a feeder are separated. Further, in the above embodiment, the induction motor is exemplified as the motor for driving the correction amount adjusting mechanism, but it is needless to say that the present invention is not limited to this, and another type of motor may be used. Further, it is needless to say that the present invention is not limited to the mode in which an inverter is used as the motor driving means, or that the entire configuration of the control unit is not limited to the mode in the above-described embodiment. Further, the coil outer diameter detecting device of the present invention is not limited to the mode used for adjusting the correction amount of the correction device as in the above-described embodiment, and accurately displays the remaining amount of the coil material as described above. It can be used only for other purposes such as.

[0029]

According to the coil material straightening apparatus and the coil outer diameter detecting apparatus of the present invention, the coil outer diameter during operation (during unwinding operation) that changes every moment can be used to unwind the band-shaped material without using a sensor. It is calculated sequentially based on the length. For this reason,
There is no need to provide an expensive sensor for detecting the coil outer diameter, and the cost can be reduced accordingly. Further, since it is not necessary to always press the roll for holding the coil against the coil material during operation, there is no possibility that the coil material is unnecessarily damaged by the roll. Further, since the coil outer diameter is obtained by calculation based on the unwinding length of the belt-shaped material, the coil outer diameter during operation can be detected with extremely high accuracy. That is, the resolution for detecting a change in the coil outer diameter is significantly improved. Therefore, in the coil material straightening apparatus of the present invention, the automatic adjustment of the correction amount can be performed more frequently and finely, and the accuracy of the automatic adjustment of the correction amount can be significantly improved.

Further, as in the straightening device according to the second aspect,
When the correction amount is separately adjusted and controlled on the inlet side and the outlet side of the belt-shaped material, the correction amount according to the coil outer diameter can be adjusted with higher quality.

Further, if the coil outer diameter during operation, which changes every moment, can be detected with high accuracy, the following practical advantages can be obtained in addition to the effects described above. That is, the display of the remaining amount of the coil material (notification to the worker) can be accurately performed, which can contribute to improvement of convenience. Further, control for optimally adjusting the expanding force of the mandrel in the uncoiler in accordance with the outer diameter of the coil can be performed with high accuracy, and problems caused by the inappropriate expanding force can be accurately avoided.

[Brief description of the drawings]

FIG. 1 is a side view showing equipment including a coil material straightening device.

FIG. 2 is a plan view showing the same equipment.

FIG. 3 is a block diagram showing a control system of the facility.

FIG. 4 is a diagram illustrating setting of a reference value of a correction amount and the like.

FIG. 5 is a diagram for explaining the principle of calculating the outer diameter of a coil;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil material 2 Strip material 10 Uncoiler 20 Leveler feeder (straightening device, feeder) 22a Straightening roll (straightening part) on one side 22b Straightening roll (straightening part) on the other side 24 Straightening amount adjusting mechanism 25 Support members 26a, 26b Eccentric shaft (drive means) 27a, 27b Motor (drive means) 101 Sequencer (calculation means, control means)

Claims (3)

[Claims] 1. A straightening device for a coil material for improving the flatness of a band material unwound from a coil material, wherein the straightening unit corrects the band material by curving it in a wave shape in a longitudinal direction. And a correction amount adjusting mechanism for adjusting the correction amount, based on a preset initial value of the coil outer diameter of the coil material, a predetermined plate thickness of the band material, and an unwind length of the band material. The current value of the coil outer diameter is sequentially calculated, and a correction amount corresponding to the current value of the coil outer diameter is calculated from a preset reference value of the coil outer diameter and a reference value of the correction amount corresponding thereto. Calculating means for sequentially calculating, and control means for controlling the correction amount adjusting mechanism so that the correction amount in the correction unit is the correction amount calculated by the calculation means, Straightening device 2. The straightening portion is arranged in two rows in a staggered manner in the insertion direction of the band-shaped material, and is alternately pressed against one surface side and the other surface side of the inserted band-shaped material,
It comprises a plurality of straightening rolls for straightening the band-shaped material in a wavy shape in the longitudinal direction, and the straightening amount adjusting mechanism comprises a straightening roll on one surface arranged on one surface of the band-shaped material among the plurality of straightening rolls. And a driving means capable of independently displacing the entrance side and the exit side in the insertion direction of the support member in a direction orthogonal to the band-shaped material. 2. The coil material straightening device according to claim 1, wherein the displacement amounts on the inlet side and the outlet side are separately calculated and controlled by the calculating means and the control means as the correction amount. 3. A coil outer diameter detecting device for sequentially detecting a coil outer diameter of a coil material that decreases in accordance with an operation of unwinding a strip from the coil material, the coil outer diameter detecting device comprising: A calculating means for sequentially calculating a current value of the coil outer diameter based on an initial value of a diameter, a preset thickness of the band-shaped material, and an unwinding length of the band-shaped material. Detector for coil outer diameter.