JPH0510172B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a coil material feeding device that sequentially supplies coil material (workpiece material wound in a coil shape) to a press device. The present invention relates to a coil material feeding device that can reduce the installation space while being compatible with press equipment.

[Technical background of the invention]

In the case of a coil material feeding device that feeds coil material to a press device, there is an uncoiler that winds the coil material, a leveler that straightens the curl of the coil material fed out from the uncoiler, and smooths it out. It is well known that the minimum component is a feeder that feeds the smoothed coil material in synchronization with the operating cycle of the press device.

By the way, when compared to sheet material conveying devices, coil material feeding devices have problems such as the overall size of the device due to the fact that it routes long coil materials, and it is difficult to improve the feeding speed, which requires less installation space. Various efforts have been made to save money and increase speed.

First, the device shown in FIG. 3 is a conventional coil material feeding device mainly focused on high-speed operation. 1 indicates an uncoiler, 2 indicates a coil material, and the coil material 2
is wound around uncoiler 1. Further, 3 is a leveler for feeding the coil material 2 from the uncoiler 1, correcting its curl and smoothing it, 4 is a feeder for feeding the smoothed coil material to a subsequent press device (not shown), 5 1 and 2 respectively show loop controllers that control the amount of loop-shaped deflection of the coil material 2 between the leveler 3 and the feeder 4.

As is well known, the press device accepts material conveyance when the angle of its crank drive mechanism is in the range of 270° to 90°, so the feeder 4 also performs intermittent feeding operations in accordance with the operating cycle of the press device. There is a need.

On the other hand, since the leveler 3 performs the feeding operation of the coil material 2 and also smoothes the coil material, the acceleration/deceleration response that follows acceleration and deceleration is low, and especially when performing high-speed operation, the leveler 3 and feeder 4 are Due to the necessity of running both at high speeds, the acceleration/deceleration response becomes even lower. The problem arises that the overall length must be made sufficiently large, and the installation space becomes large.

The device shown in FIG. 4 is designed with a particular focus on space saving, and uses a leveler feeder 6 that integrates a leveler and a feeder to smooth the coil material 2 and feed it to the press device. It's on.

In the case of the apparatus shown in Fig. 4, the leveler feeder 6 smoothes the coil material and feeds it to the press device, and there is no need to consider the elastic recovery limit of the coil material, so a large loop between the leveler and the feeder is eliminated. Can be omitted, just uncoiler 1 and leveler feeder 6
It is only necessary to provide a few loop controllers 7 between them, which saves space, but the acceleration/deceleration response of the leveler feeder 6 is lower than that of a single feeder, so it is not suitable for high-speed operation, and the uncoiler 1
However, there is a problem in that the structure of the uncoiler is limited because it cannot be used unless it is of an automatic feeding type.

[Purpose of the invention]

The present invention has been made in view of the current situation, and it is an object of the present invention to provide a coil material feeding device that can be adapted to high-speed operation while reducing the installation space of the entire device.

[Summary of the invention]

In summary, the coil material feeding device of the present invention includes a feeder that feeds the coil material to the press device at a timing corresponding to the machine cycle of the press device, and a leveler that smoothes the coil material fed out from the uncoiler. In a coil material feeding device that is driven by an independent power source and that performs loop control in a feeding path from the leveler to the feeder, the coil material feeding device has an independent power source and a pinch feeder that feeds out the coil material from the uncoiler. It is equipped with a loop controller that performs loop control in the feed path from the roll and the pinch roll to the leveler, and distributes the load for feeding out the coil material and the load for smoothing the coil material. By adding the leveler,
By improving deceleration response and ensuring reliable loop control even if the length of the feeding path required for loop control is shortened, it is possible to reduce installation space while gaining adaptability to high-speed operation. .

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a mechanical diagram of a coil material feeding device according to an embodiment of the present invention, in which reference numeral 10 indicates a frame;
0 is an uncoiler, 30 is a coil material, 40 is a pinch roll that unwinds the coil material 30 from the uncoiler 20, 50 is a leveler that corrects the curl of the uncoiled coil material 30 and smooths it, and 60 is a smoother. A feeder 70 feeds the coil material 30 in an appropriate amount to the press device in synchronization with the machine cycle of the press device (not shown) in the subsequent stage, and controls the loop amount of the coil material 30 between the pinch roll 40 and the leveler 50. Loop controller, 80 is leveler 5
A loop controller for controlling the loop amount of the coil material 30 between the coil material 30 and the feeder 60 is shown.

Next, the configuration of the various components housed in the frame 10 will be described in detail.

First, the uncoiler 20 is rotatably supported on the frame 10 so as to be parallel to the feeding plane of the coil material 30, and its axial length covers the maximum width of the coil material 30 that is expected to be handled. shall be sufficient to enable it to be carried out.

Further, in this embodiment, the coil material 30 is wound clockwise around the uncoiler 20, and the outlet of the coil material 30 is located at the lower left in the drawing. Note that the mechanism for the uncoiler 20 to support the coil material 30 may be a conventionally known mechanism.

Next, the pinch roll 40 is a driving roll 41,
Driven roll 42, motor 43, power transmission belt 4
4, 45, pulleys 46, 47, and an air cylinder mechanism 48.

First, the driving roll 41 is rotatably supported on the frame 10 in parallel to the feeding plane of the coil material 30, and the driving roll 41 is rotatably supported by the frame 10 in parallel to the feeding plane of the coil material 30, and is transmitted through the power transmission mechanism consisting of the power transmission belts 44, 45 and pulleys 46, 47 described above. It is connected to a motor 43 that rotates counterclockwise.
Further, both ends of the driven roll 42 are rotatably supported by a stem 49, and the stem 49 is suspended by a telescopic air cylinder mechanism 48. Therefore, after the driven roll 42 is released by contracting the air cylinder mechanism 48 and the tip of the coil material 30 is threaded between the driven roll 42 and the driving roll 41, the air cylinder mechanism 48 is extended. If the coil material 30 is pinched between the driving roll 41 and the driven roll 42 and the motor 43 is rotated, the driving roll 41 will rotate counterclockwise or
Following this, the driven roll 42 rotates clockwise, and the coil material 30 threaded between the driving roll 41 and the driven roll 42 passes through the loop controller 70 and is fed to the leveler 50.

The axial lengths of the driving roll 41 and the driven roll 42 are also set to be sufficient to cover the maximum width of the coil material 30 expected to be handled.

Next, the leveler 50 includes a driving roll 51, a driven roll 52, a motor 53, and power transmission belts 54, 5.
5, pulleys 56 and 57, and a work roll 58.

First, the driving roll 51 is rotatably supported on the frame 10 in parallel to the feeding plane of the coil material 30, and the driving roll 51 is rotatably supported by the frame 10 in parallel to the feeding plane of the coil material 30, and is transmitted through the power transmission mechanism consisting of the power transmission belts 54, 55 and pulleys 56, 57 described above. The driven roll 52 is connected to a clockwise rotating motor 53, and the driven roll 52 is rotatably supported on the frame 10 with its side surface in close contact with the side surface of the driving roll 51.

Therefore, the tip of the coil material 30 is attached to the driven roll 52.
If the motor 43 is rotated after threading between the driving roll 51 and the driving roll 51, the driving roll 51 rotates clockwise and the driven roll 52 follows this rotation and rotates counterclockwise. The coil material 30 threaded in between is fed to the right.

The work rolls 58 are rotatably supported alternately along the upper and lower surfaces of the feeding plane of the coil material 30 that is fed rightward by the driving roll 51 and the driven roll 52. The coil material 30 fed by the upper and lower work rolls 51 and driven rolls 52 is corrected and smoothed in the process of passing between the upper and lower work rolls 58, and is then fed to the feeder 60 via the loop controller 80. sent.

It goes without saying that the axial lengths of the driving roll 51, driven roll 52, and work roll 58 are also sufficient to cover the maximum width of the coil material 30 expected to be handled.

Next, the feeder 60 includes a driving roll 61, a driven roll 62, a motor 63, a power transmission belt 64,
65 and pulleys 66 and 67.

First, the driving roll 61 is rotatably supported on the frame 10 in parallel to the feeding plane of the coil material 30, and the driving roll 61 is rotatably supported by the frame 10 in parallel to the feeding plane of the coil material 30, and is transmitted through the power transmission mechanism consisting of the power transmission belts 64, 65 and pulleys 66, 67 described above. The driven roll 62 is connected to a clockwise rotating motor 63 and is rotatably suspended by an air cylinder mechanism 68 that is extendable and retractable parallel to the feeding plane of the coil material 30 .

Therefore, if the air cylinder mechanism 68 is extended to rotate the motor 63 while sandwiching the coil material 30 between the driven roll 62 and the driving roll 61, the driving roll 61 will rotate clockwise and the driven roll 62 will rotate clockwise. The coil material 30 rotates counterclockwise and is fed to a press device (not shown) at the subsequent stage, and when the rotation of the motor 63 is stopped and the air cylinder mechanism 68 is contracted to release the driven roll 62, the coil material 30 is
feeding will be stopped.

It goes without saying that the axial lengths of the driving roll 61 and the driven roll 62 are sufficient to cover the maximum width of the coil material 30 expected to be handled.

By the way, the feeder 60 feeds the coil material 3 at a timing when the press device can accept feeding of the coil material.
As already mentioned, the desired amount of 0 must be fed.

Therefore, the feeder 60 starts feeding the coil material at a timing when the press device can accept the feeding of the coil material 30 (for example, when the angle of the crank drive mechanism reaches 270 degrees), and
The feeding operation of the coil material must be completed by the timing when the press device cannot accept feeding of the coil material 30 (timing when the angle of the crank drive mechanism reaches 90 degrees).

On the other hand, a leveler 5 that smooths the coil material 30
The load at 0 is greater than the load on the feeder 60 that simply performs a feeding operation, and in order to prevent response delays, it is desirable that the fluctuations in the running speed of the leveler 50 be smaller than the fluctuations in the running speed of the feeder 60.

Therefore, since the length of the coil material 30 in the feeding path from the leveler 50 to the feeder 60 always changes,
In the feeding path leading to the coil material 30, the coil material 30 is bent in a loop shape in advance, and the amount of deflection falls within a predetermined tolerance range (this tolerance range is determined by the elastic recovery force of the coil material 30). It is necessary to perform so-called loop control.

The details of the control operation for performing this loop control will be described in detail later, and the configuration of the route correction lever 81 and its accompanying mechanism will be explained here. It has a ladder-like structure connected by guide rolls 81b and 81c, and is rotatably supported by the frame 10 about an axis 81d. A tensile force is applied to the right end of the path correction lever 81 in the direction of the frame 10 by an air cylinder mechanism 82, and the coil material 30 is moved along the upper surface of the guide roll 81b and the lower surface of the guide roll 81c to the feeder 6.
It reaches 0. In addition, in the drawing, the coil material 30 and the shaft center 81
b is depicted as interfering with each other,
The axis 81d is supported by the frame 10 on the outside of the pair of sides 81a, and does not penetrate inside the pair of sides 81a, so the coil material 30 and the axis 81d do not interfere with each other. In addition, S1 and S in the figure
2 each indicate a proximity sensor, and a path correction lever 81
The feeding speed of the leveler 50 is accelerated or decelerated in response to the outputs of the proximity sensors S1 and S2.

Due to such slight acceleration/deceleration of the leveler 50, the length of the coil material 30 between the pinch roll 40 and the leveler 50 changes.
Therefore, in this embodiment, in the feeding path from the pinch roll 40 to the level 50, the coil material 3
0 is bent in a loop shape in advance, and so-called loop control is performed so that the amount of bending falls within a predetermined allowable range.

The details of the specific control operation for this loop control will be explained later in the explanation of the operation, and here the structure of the loop controller 70 will be explained. The longest feeding guide 7 is approximately semicircular along the outer periphery of the feeding path.
1, and the shortest feeding guide 72 is arranged approximately semicircularly along the inner circumference of the feeding path of the coil material 30.
The longest feeding guide 71 and the shortest feeding guide 72 are provided with slits 73 in the width direction at appropriate intervals, and each slit 73 is provided with a guide roll 74 that extends its side surface into the feeding path. It is pivoted so that it can rotate freely. It goes without saying that the total width of the longest feeding guide 71 and the shortest feeding guide 72 is larger than the total width of the coil material 30 that is scheduled to be handled.

Further, L1 and L2 indicate a light emitting part, and T1 and T2 indicate a light receiving part, respectively. The light emitting part L1 and the light receiving part T1 constitute a photoelectric sensor, and the light emitting part L2 and the light receiving part L2 constitute a photoelectric sensor. .

Next, FIG. 2 is a block diagram of the control system of this embodiment, in which 100 is a main controller that controls the entire system, 101 is an operation panel that gives various operation instructions,
200 is a press device, S1 and S2 are proximity sensors shown in FIG. 1, T1 and T2 are light receiving units shown in FIG. 1, 400 is a pinch roll drive motor control unit that determines the excitation pattern of the motor 43, 500 is a leveler drive motor control unit that determines the excitation pattern of the motor 53; 600 is a feeder drive motor control unit that determines the excitation pattern of the motor 63;
1,501,601 is the driver, 402,50
2 and 602 are pulse generators for position feedback, and 403, 503, and 603 are tachogenerators for velocity feedback, respectively.

Next, the operation of the present invention will be explained with reference to the above matters.

First, prior to the work, the tip of the coil material 30 wound around the uncoiler 20 is unwound, and the tip is fed into the gap between the driving roll 41 and the driven roll 42, and then via the loop controller 70 between the driving roll 51 and the driven roll 52. Gap and upper and lower work rolls 58
The material is then threaded into the gap between the driving roll 61 and the driven roll 62 via the loop controller 80.

On the other hand, the operator inputs control data specifying the material, plate thickness, plate width, etc. of the coil material 30 and control data specifying the feeding speed, feeding amount, feeding timing, etc. from the operation panel 101, and accepts the control data. The main controller 100 transmits these control data to the pinch roll drive motor control unit 40 in accordance with the contents.
0, leveler drive motor control section 500, and feeder drive motor control section 600, and these control sections store the given control data.

After that, when the operator gives a start instruction from the operation panel 101, the main controller 100 gives a start signal to the pinch roll drive motor control section 400 and the leveler drive motor control section 500, and the pinch roll drive motor control section 400 and the leveler drive motor The control unit 500 rotates the motors 43 and 53 according to each set control data.

First, the rotation of the motor 43 rotates the driving roll 41 via the power transmission mechanism described above, and the coil material 30 wound around the uncoiler 20 is rotated by the driving roll 4.
1 and the driven roll 42 while being squeezed, and fed in the direction of the leveler 50 via the loop controller 70.

Further, the rotation of the motor 53 rotates the driving roll 51 via the power transmission mechanism described above, and the coil material 30 fed out by the pinch roll 40 is compressed in the gap between the driving roll 51 and the driven roll 52. It is fed rightward, smoothed in the process of passing through the gap between the upper and lower work rolls 58, and fed in the direction of the feeder 60 via the loop controller 80. Then, when the feeding speed by the pinch roll 40 and the leveler 50 reaches a desired speed after a predetermined period of time has elapsed, the pinch roll 40 and the leveler 50 basically travel at a constant speed.

On the other hand, the crank angle of the press device 200 is
When the angle reaches 270°, the feed request signal is sent to the main controller 100.
The main controller 100 gives a start instruction to the feeder drive motor control section 600. Accordingly, the feeder drive motor control section 600 rotates the motor 63 according to the respective set control data.

The rotation of this motor 63 rotates the drive roll 61 via the transmission mechanism described above, and the leveler 50 rotates.
The coil material 30 smoothed by this is fed to the press device in a desired amount while being pressed between the driving roll 51 and the driven roll 52, and one feeding operation is completed.

By the way, the feeder 60 can be used as a leveler 50 in a short time.
Since the same amount of coil material 30 must be fed, the feeding speed of the feeder 60 is faster than the feeding speed of the leveler 50, and when the feeder 60 starts feeding, the coil from the leveler 50 to the feeder 60 is fed. The length of the material 30 becomes shorter. As a result, coil material 30
rotates the path correction lever 81 counterclockwise around the axis 81d against the tensile force of the air cylinder 82, and even if the length of the coil material 30 from the leveler 50 to the feeder 60 is shortened, the coil The material 30 is the upper surface of the guide roll 81b and the guide roll 81c.
is fed along the bottom surface of the Also, conversely, feeder 6
0 stops feeding, the leveler 50 is running at a constant speed, so the length of the coil material 30 from the leveler 50 to the feeder 60 becomes longer, but the tension of the air cylinder 82 causes the path correction lever to 81 rotates clockwise around the axis 81d, the coil material 30 can be rotated around the guide roll 81b without loosening.
It is fed along the upper surface and the lower surface of the guide roll 81c.

During normal operation, the fluctuation of the path correction lever 81 as described above sufficiently absorbs the increase or decrease in the length of the coil material 30 from the leveler 50 to the feeder 60. If the feeding speed of the leveler 50 increases or decreases due to changes in the load on the leveler 50 or other factors, the leveler 50
The length of the coil material 30 from the feeder 60 to the feeder 60 gradually increases or decreases, and the swinging of the path correction lever 81 alone cannot absorb the increase or decrease in the amount of deflection of the coil material 30.

Therefore, in this embodiment, the feeding speed of the leveler 50 is varied based on the outputs of the proximity sensors S1 and S2, so that the amount of deflection of the coil material 30 from the leveler 50 to the feeder 60 is within a predetermined allowable range. I have to.

First, a case where the feeding speed of the leveler 50 increases due to some factor will be described.

As already explained, when the feeder 60 stops feeding operation, the length of the coil material 30 from the leveler 50 to the feeder 60 increases due to the feeding operation by the leveler 50, and the length of the coil material 30 from the leveler 50 to the feeder 60 increases. The path correction lever 81 rotates clockwise due to the tensile force, but if the feeding speed of the leveler 50 increases due to some reason at this time, the feeder 60 is moved from the leveler 50 to the feeder 60.
The length of the coil material 30 further increases, and the path correction lever 81 rotates until its right end reaches the vicinity of the proximity sensor S1.
1 rotates clockwise, the curvature of the coil material 30 exceeds its elastic recovery limit.

Therefore, the proximity sensor S1 detects the path correction lever 81.
When detecting the proximity of
Coil material 30 from leveler 50 to feeder 60
The length of is decreasing.

Next, a case where the feeding speed of the leveler 50 decreases due to some factor will be described.

As already explained, when the feeder 50 starts the feeding operation, the length of the coil material 30 from the leveler 50 to the feeder 60 decreases, and the path correction lever 81 rotates counterclockwise due to the tension of the coil material 30. At this time, if the feeding speed of the leveler 50 decreases due to some reason, the feeder 60 will be moved from the leveler 50 to the feeder 60.
The length of the coil material 30 is further reduced, and the path correction lever 81 is rotated until its right end reaches the vicinity of the proximity sensor S2. At this point, the tension of the coil material 30 itself causes the path correction lever 81 to
cannot rotate counterclockwise, so if the length of the coil material 30 from the leveler 50 to the feeder 60 is reduced any further, the feeder 60 will be in an overloaded state.

Therefore, the proximity sensor S2 detects the path correction lever 81.
When detecting the proximity of
Coil material 30 from leveler 50 to feeder 60
The length of is increasing.

By the way, the loop controller 80 is provided to allow the entire device to operate normally even if the amount of deflection of the coil material 30 increases or decreases as long as it is within a predetermined tolerance range. The path length required by the controller 80 is the same as that of the leveler 5 when the elastic recovery forces of the coil material 30 are equal.
It is clear that the higher the zero acceleration/deceleration response, the shorter the time. In the case of the coil material feeding device of this embodiment, only the load necessary for smoothing the coil material 30 is applied to the leveler 50, and the uncoiler 2
Since no load is applied to pay out the long coil material 30 from zero, the acceleration/deceleration response characteristics of the leveler 50 are improved by several steps compared to conventional devices of this type. Therefore, in this embodiment, even if the path length of the loop controller 80 is shortened, reliable loop control can be performed.

In addition, since loop control is possible by accelerating and decelerating the feeding speed of the leveler 50 as described above, the pinch roll 40 is controlled by accelerating and decelerating the leveler 50 and other factors. Even if the relative speed of Therefore, in this embodiment, so-called loop control is performed on the feeding route from the pinch roll 40 to the level 50.

First, when the relative speed of the pinch roll 40 with respect to the speed of the leveler 50 increases due to some factor, the coil material 3 from the pinch roll 40 to the leveler 50 increases.
The length of the coil material 30 increases, and eventually the coil material 30 comes to be fed along the longest feeding guide 71. If the length of the coil material 30 from the pinch roll 40 to the leveler 50 increases further, a large bending force is applied to the coil material 30, but at this point the optical path from the light emitting section L1 to the light receiving section T1 is already blocked. Therefore, the output of the light receiving section T1 has fallen to logic 0. When the output of the light receiving section T1 falls to logic 0, the main controller 100 gives a deceleration instruction to the pinch roll drive motor control section 400, and accordingly, the pinch roll drive motor control section 40
0 decelerates the motor 43. Therefore, the feeding speed of the pinch rolls 40 decreases, and the length of the coil material 30 from the pinch rolls 40 to the leveler 50 decreases, so that no large bending force is applied to the coil material 30.

Further, if the relative speed of the pinch roll 40 to the speed of the leveler 50 decreases due to some factor, the coil material 30 from the pinch roll 40 to the leveler 50
The length of the coil material 30 decreases until the coil material 30 is fed along the shortest feeding guide 72. If the length of the coil material 30 from the pinch roll 40 to the leveler 50 is further reduced, a large load will be suddenly applied to the leveler 50, but at this point the optical path from the light emitting part L2 to the light receiving part T2 is already blocked. Since it is missing, the output of the light receiving part T2 is logic 1.
is rising. When the output of the light receiving section T1 rises to logic 1, the main controller 100 gives an acceleration instruction to the pinch roll drive motor control section 400, and the pinch roll drive motor control section 400 accelerates the motor 43 accordingly. Therefore, the feeding speed of the pinch roll 40 increases, and the pinch roll 4
Since the length of the coil material 30 from zero to the leveler 50 also increases, an excessive load is not applied to the leveler 50.

In addition, the pulse generators 402, 502, 60
2 and the feedback system using the tachometer generators 403, 503, and 603, conventionally known ones can be applied, so a redundant explanation will be omitted.

Moreover, although the case where each feeding device is a so-called roll feed has been described above, it goes without saying that the present invention can be applied to cases of other feeding devices.

Furthermore, in a coil material feeding device that provides independent drive sources to the feeder and leveler and performs loop control on the feeding path from the leveler to the feeder, pinch rolls for feeding out the coil material from the uncoiler are provided independently. The basic idea of the present invention is to improve the acceleration/deceleration response of the leveler by performing loop control on the feed path from the pinch roll to the leveler. As long as it is located along the conveying path,
It can be used as is even if the specific arrangement locations are changed in various ways, and various changes in aspects will occur.

〔Effect of the invention〕

As explained above, according to the present invention, the leveler is freed from feeding out the coil material, and loop control is performed in the feeding path from the pinch roll to the leveler, so that the leveler can be adjusted and
It has improved deceleration response and can sufficiently follow press equipment that operates at high speed. Furthermore, as the acceleration/deceleration response of the leveler improves, sufficient loop control becomes possible even if the feed path from the leveler to the feeder is shortened, and the installation space is also reduced.

[Brief explanation of the drawing]

FIG. 1 is a mechanical diagram of a coil material feeding device according to an embodiment of the present invention, FIG. 2 is a block diagram of a control system for the coil material feeding device shown in FIG. 1, and FIGS. 3 and 4 are Mechanism diagram of a conventional coil material feeding device. 20... Uncoiler, 30... Coil material, 40... Pinch roll, 50... Leveler, 60... Feeder, 7
0...Loop controller, 80...Loop controller.

Claims (1)

[Claims] 1 (a) A feeder that feeds coil material to the press device at a timing corresponding to the machine cycle of the press device and a leveler that smoothes the coil material fed out from the uncoiler are each powered independently. (b) a pinch roll having an independent power source and feeding out the coil material from the uncoiler; (c) A coil material feeding device characterized by comprising a loop controller that performs loop control in a feeding path from the pinch roll to the leveler.