JPH0675732B2 - Mandrel controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention holds a coil material supplied to a processing machine such as a press machine through a feeding device, and pays out the coil material as necessary. Alternatively, the present invention relates to a mandrel for winding a coil material discharged from a processing machine, and more particularly to a control device for controlling the feeding or winding speed of the coil material.

[Prior art]

Generally, when performing a press work etc., when using the coil material wound in strip shape as a to-be-processed material, a mandrel is used as a means to hold | maintain a coil material. This mandrel supports the coil material from the inside or the outside and feeds the coil material according to the acceleration speed. The coil material is supplied to the press machine by a feeder while being leveled by a leveler or the like as necessary. On the other hand, after the press working, when the remaining portion of the coil material is subjected to secondary working or the like, the remaining portion of the coil material is wound by a separately prepared mandrel according to the working speed. Further, the mandrel is called an uncoiler when it is used exclusively for feeding the coil material, and is called a ricoiler when it is used exclusively for winding the coil material.

FIG. 4 shows an example of the press line.
Is a press machine, and 2 is a die including an upper die and a lower die. A feeding device 3 is composed of a pair of upper and lower rolls, and the coil material 6 is sandwiched between the rolls, and the coil material 6 is intermittently supplied to a predetermined length according to the processing speed of the press 1. .

Further, 4 is a pair of upper and lower loop sensors for detecting the upper and lower limit positions of the loop of the coil material 6, and 5 is an uncoiler as a mandrel for holding the coil material 6. The uncoiler 5 has a holding portion 5a that is rotatably formed by a motor (not shown) and holds the coil material 6, and a control device 5b that controls the motor based on the detection signal detected by the loop sensor 4. is doing.

Then, the coil material 6 is intermittently supplied for a fixed length through the feeding device 3 in accordance with the press working, and the loop amount of the coil material 6 decreases, and when the upper loop sensor 4 is contacted, the control device 5b causes Upon receiving the detection signal, the motor of the uncoiler 5 is driven to feed the material. When the loop amount of the coil material 6 further increases and the coil material 6 contacts the lower loop sensor 4, the control device 5b receives the detection signal and stops the motor of the uncoiler 5 to stop the feeding of the coil material 6. To do. And by repeating this,
The coil material 6 is fed from the uncoiler 5 according to the processing speed of the press 1.

[Problems to be Solved by the Invention]

By the way, in the conventional uncoiler (cradle) shown in FIG.
Since the control is performed by the OFF control, if the ON and OFF operations are frequently performed, there is a problem that the coil material is scattered due to the inertia of the coil material. In addition, the feeding speed of the coil material can be set manually in several steps, but if the feeding length of the coil material by the feeding device changes, the feeding speed must be adjusted each time, and the adjustment work There was a problem that it became complicated.

By controlling the motor of the uncoiler (cradle) by the inverter control, the coil material feeding operation can be started and stopped by soft touch, and the coil material can be prevented from scattering to some extent. However, when the feeding length of the coil material by the feeding device changes, the feeding speed must be readjusted in the same manner, and the adjustment work becomes complicated.

Further, as the outer diameter becomes smaller due to the feeding of the coil material, the feeding amount of the coil material per one rotation of the holding portion decreases. Therefore, if the initial setting is incorrect, the feeding speed will not reach the processing speed during the processing work.
There was a problem that the number of rotations of the motor had to be readjusted.

The present invention has been made in view of the above problems,
When the feed length of the coil material by the feeder changes,
The purpose of the present invention is to provide a mandrel that does not require speed adjustment work by automatically switching the speed even when it is necessary to change the feeding speed or the winding speed of the coil material as the outer diameter of the coil material changes. To do.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the configuration of the present invention is such that a processing machine such as a press machine holds a coil material supplied through a feeding device or the like, and pays out the coil material according to a supply amount,
In the mandrel for winding the coil material discharged from the processing machine, a detecting means for detecting the upper limit position and the lower limit position of the loop of the coil material, and the coil shape from the lower limit position of the loop to the upper limit position or from the upper limit position to the lower limit position. When the coil shape reaches the upper limit position and the lower limit position of the loop based on the detection signal of the measuring means and the detecting means for measuring the time to reach
It has a control means for switching the stop and switching the rotational speed of the drive motor in several stages based on the time measured by the measuring means.

[Work]

Due to the above configuration, the time taken for the coil material to reach from the lower limit position to the upper limit position or from the upper limit position to the lower limit position of the loop is measured, and based on that time, the mandrel drive is automatically driven. The mandrel feeding or winding speed can be set to an optimum speed by switching the rotation speed of the motor in several stages.

〔Example〕

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

FIG. 1 is a block diagram showing the mandrel controller of the present invention, and FIG. 2 is a diagram showing the operating state of the detecting means. An uncoiler is taken as an example of the mandrel, and the basic configuration of the uncoiler will be described as being equivalent to that of the conventional uncoiler shown in FIG.

In the figure, A is a control device, and a detection device 11 as detection means,
The control unit 12 controls the drive motor 19 of the uncoiler as a mandrel based on the detection result of the detection device 11. The detection device 11 is composed of a switch 11a that detects the lower limit position of the loop of the coil material and a switch 11b that detects the upper limit position of the loop. And second
As shown in the figure, the detection device 11 uses, for example, an arm 20 whose one end is bent in an L-shape and is rotatably held, and the L-shaped end of the arm 20 is constantly formed by a loop forming portion of the coil material M by its own weight. The arm 20 is placed on the upper surface, and the arm 20 is rotated by the loop shape of the coil material M. On the other hand, when the arm 20 rotates, the other end of the arm 20 moves to the switch 11
It contacts the a and 11b and detects the lower limit position and the upper limit position of the loop of the coil material M.

The control unit 12 also serves as a measuring unit and a control unit, and is composed of a microprocessor 13, a clock signal generating unit 14, a memory 15, a timer 15 ', an interface 16, an input / output port 17 and an inverter 18. . More specifically, the microprocessor 13 and the timer 15 '
The microprocessor 13 processes the detection signals of the switches 11a and 11b of the detection means 11 and the clock signal from the clock signal generator 14, and the timer 15 '
The time required for the coil material to reach from the lower limit position of the loop to the upper limit position or from the upper limit position to the lower limit position of the loop is measured. Further, the microprocessor 13 outputs to the inverter 18 speed signals of several stages (for example, four stages) set in the memory 15 in advance according to the measurement time based on the measurement result by the timer 15 '. The inverter 18 controls the rotation speed of the drive motor 19 of the uncoiler 5 based on the speed signal. Further, when the coil material M reaches the upper limit of the loop, when the coil material M is fed from the uncoiler 5, based on the detection signal of the detection means 11,
An operation signal for operating the drive motor 19 is output, and when the coil material M reaches the lower limit of the loop, an operation signal for stopping the drive motor 19 is output, and the inverter 18 drives the drive motor 19 based on the operation signal. This is to switch between running and stopping.

Next, the overall operation will be described with reference to the flowcharts shown in FIGS. 3 (a) and 3 (b). The uncoiler 5 is used when feeding the coil material M in combination with a feeding device, and the rotation speed of the drive motor 19 is assumed to be switched among four stages. As for the state before the operation of the feeding device, the material is fed out until the switch 11a is turned on, and the switch 11a is turned on.
Stops the motor when turned on. Further, the flow chart shows a series of processes of the control unit 12 of the uncoiler 5, and the process is always repeated in this cycle 11.

In the flowchart, first, it is determined whether the feeding device is in operation. If the feeding device is in operation, the feeding operation during operation is started.

When the uncoiler 5 is in the feeding operation, as shown in FIG. 3 (a), in the control unit 12, the switch 11a of the detection device 11 is turned on.
It is determined whether N (whether the coil material M is at the lower limit position of the loop). Next, when the switch 11a is ON,
The microprocessor 13 determines whether or not the switch 11a is turned on for the first time during one cycle of the feeding operation. That is, in the case of YES (when the switch 11a is ON for the first time), the measurement of the first time (time until the switch 11b is ON) until the coil material M reaches the upper limit position of the loop is started. However, in this case, the first time held in the timer 15 'is cleared. At the same time, the measurement of the second time (the time until the coil material M reaches the lower limit position from the upper limit position of the loop, or the halfway time after leaving the upper limit position) measured in the previous cycle is stopped. Then, the drive motor 19 is also stopped. On the other hand, if the coil material M once separates from the switch 11a during one cycle and immediately contacts the switch 11a, the drive motor 19 is stopped while keeping the time information.

Next, if switch 11a is OFF, switch 11b is ON
Determine whether When the switch 11b is ON, it is determined whether the switch 11b is first turned ON during one cycle of the feeding operation. That is, when the switch 11b is turned on for the first time, the measurement for the first time, which has been measured until then, is stopped. Then, the second time held in each of the timers 15 'is cleared, the measurement of the second time is newly started, and the drive motor 19 is driven at the rotation speed previously fed. However, when operating the line for the first time, the speed at which the overall line speed is judged based on the first time and the speed can be fed out slightly faster than the line speed from the four speed signals stored in the memory 15 in advance. The signal is selected by the microprocessor 13, and the drive motor 19 is driven by the inverter 18 based on the speed signal.
Drive.

If the switch 11b is turned on once and then the switch 11b is turned on again before the switch 11a is turned on (without the coil material M reaching the lower limit position), the line speed is set to the uncoiler 5
Since it is a case where the feeding speed of can not follow, an alarm is generated and the entire line is stopped.

Further, when both of the switches 11a and 11b are NO, the uncoiler 5 is feeding and the coil material M is moving from the upper limit position to the lower limit position of the loop, or the uncoiler 5 has stopped feeding and the coil material This is the case where M goes from the lower limit position of the loop to the upper limit position. Then, it is determined whether the uncoiler 5 is being fed out or in the stopped state, and if it is in the stopped state, the drive motor 19 is stopped.

When the uncoiler 5 is being extended, the microprocessor 13 compares the first time and the second time, and when the first time is greater than the second time, the rotational speed of the drive motor 19 is changed to the fourth speed The microprocessor 13 selects a speed signal that makes the rotation speed higher than the rotation speed by the microprocessor 13, and controls the inverter 18 based on this speed signal to switch the rotation speed. If the rotation speed is the highest, an alarm is generated and the entire line is stopped.

Then, if the anchor line 5 is being extended, the control unit
The determination shown in the float chart is always made by 12, and the drive motor 19 is controlled based on the determination.

In addition, when the feeding device is stopped, the anchor line 5 is in the inching or feeding state. Here, the inching feed state means that the coil material M is normally rotated to feed the coil material M to the feeding device before machining, or the uncoiler is reversed to discharge the remaining coil material M from the feeding device at the end of machining. And then wind up. The uncoiler 5 is in a stopped state when it is in a standby state before the uncoiler 5 starts the feeding operation.

As shown in FIG. 3 (b), first, when the anchor line is inching, it is judged whether or not it is forward rotation inching, and in the case of forward rotation inching, the speed signal stored in the memory 15 is stored. A predetermined speed signal is selected by the microprocessor 13 and the drive motor is driven by the inverter 18 based on the selected speed signal.
Rotate 19 at the lowest speed. In the case of inching in the reverse direction, similarly to the inching in the forward direction, a predetermined speed signal is selected and the drive motor 19 is rotated in the reverse direction at the minimum rotation speed.

Immediately before the uncoiler 5 starts operating, the coil material M can start the measurement for the first time immediately after it is at the lower limit position of the loop, and the entire operation can be performed smoothly. Therefore, when the uncoiler 5 is stopped, the coil material M is always at the lower limit position of the loop. That is, uncoiler 5
When is stopped, it is first determined whether the switch 11a is ON. If the switch 11a is ON, the coil material M is at the lower limit position of the loop, so the drive motor 19 is stopped as it is. On the other hand, when the switch 11a is OFF, the drive motor 19 is extended at a minimum rotation speed until the switch 11a is turned ON.

As described above, the control device A for the uncoiler shown in the embodiment
Detects that the coil material M has reached the lower limit position and the upper limit position of the loop by the switches 11a and 11b of the detection device 11, and based on the detection signal, turns on and off the drive motor 19 by the microprocessor 13. The first time until the coil material M reaches the upper limit position from the lower limit position of the loop by the microprocessor 13 and the timer 15 'based on the switching signal and the clock signal of the clock signal generating unit 14 and the upper limit position of the loop. The second time, which is the time elapsed until the lower limit position is reached or after leaving the upper limit position of the loop, is measured. Then, at the beginning of the feeding operation, the speed signal stored in the memory 15 is selected based on the first time and output to the inverter 18. Further, the rotation speed of the drive motor 19 is set by the inverter 18, and the coil material M is fed at a predetermined speed. Further, during the feeding operation, the rotation speed of the drive motor 19 is switched by always comparing the first time and the second time.

Therefore, even when the processing contents change and the feed length of the coil material M by the feeding device changes, the feeding speed of the uncoiler 5 is automatically adjusted to the optimum speed by the control device A, so that the worker can operate as in the conventional case. However, there is no need to make adjustments, and adjustment work is unnecessary. In addition, the coil material M
The outer diameter of the coil material M decreases as the feeding of the coil material advances, and the feeding amount of the coil material M per one rotation of the holding portion of the uncoiler 5 decreases. Even in such a case, the rotation speed of the drive motor 19 is automatically increased, and the feeding speed of the uncoiler 5 is adjusted to the optimum speed. Furthermore, since the feeding speed is adjusted to the optimum speed, the uncoiler 5 turns on and off.
The movement is reduced, and the deviation due to the inertia of the coil material M is also reduced.

[Other Examples]

In the previous embodiment, the rotation speed of the drive motor is controlled based on the first time at the start of feeding, and the rotation speed of the drive motor is controlled by comparing the first time and the second time during the feeding. To do.

In addition, at the start of feeding, the rotation speed of the drive motor is controlled based on the first time, and during the feeding, the second rotation time is maintained as it is if the second time falls within a preset range of time. However, if it exceeds this value, the rotation speed of the drive motor may be increased, and if it is less than that, the rotation speed of the drive motor may be controlled to be low. In addition,
In this case, if the second time is controlled to be as large as possible under other conditions, the uncoiler will turn ON and OFF.
Motion can be reduced.

Further, in the above-described embodiment, an example of measuring two times, the first time and the second time, is shown, but in the case of the feeding operation, the first time corresponds to the line speed. At the start of feeding, the rotation speed of the driving motor is set according to the line speed, and during the feeding, the rotation speed of the driving motor is controlled by comparing the second time with a separately set time. Good.

In addition, the mandrel type may be an uncoiler type that unwinds the material or a chiller type that is used when the coil material is wound after pressing. However, in this case, the winding of the mandrel is stopped when the coil material reaches the upper limit position of the loop, and the winding of the mandrel is started when the lower limit position of the loop is reached. In addition, at least the time required for the coil material to reach the upper limit position from the lower limit position of the loop is measured, and based on the result, the coil material winding speed (rotation speed of the mandrel drive motor)
To switch.

Further, in the previous embodiment, the uncoiler as a mandrel was shown as an example of being used separately from the feeder and the leveler, but it was used as a control device for the uncoiler of the leveler feeder in which the feeder and the leveler and the uncoiler were integrated. May be.

Further, although an example using a pair of switches and an arm is shown as the detection means for the upper limit position and the lower limit position of the loop, other contact type or non-contact type detection means may be used.

[Effect]

As described above, the control device of the mandrel of the present invention, in the processing machine such as the press machine, holds the coil material supplied through the feeding device or the like, and pays out the coil material according to the supply amount,
In a mandrel for winding the coil material discharged from the processing machine, a detection means for detecting the upper limit position and the lower limit position of the coil material loop, and the coil material from the lower limit position of the loop to the upper limit position or from the upper limit position to the lower limit position. When the coil material reaches the upper limit position and the lower limit position of the loop based on the detection signal of the measuring means and the detecting means for measuring the time to reach
The control unit switches the stop and switches the rotational speed of the drive motor in several stages based on the time measured by the measuring unit.

Therefore, even if the work content changes and the feeding length of the coil material by the feeding device changes, the mandrel feeding speed is automatically adjusted to the optimum speed. No adjustment work is required. Also, as the outer diameter of the coil material becomes smaller due to the supply of the coil material, the amount of supply of the coil material per one rotation of the holding part decreases, but even in such a case, the rotation speed of the mandrel drive motor is automatically set to a high value. Then, the feeding speed of the mandrel is adjusted to the optimum speed. Further, since the feeding speed is adjusted to the optimum speed, the ON / OFF operation of the mandrel drive motor is reduced, and there is an effect that variation due to inertia of the coil material is also reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a mandrel control device of the present invention, FIG. 2 is a diagram showing an operating state of a detecting means, and FIGS. 3 (a) and 3 (b). FIG. 4 is a flowchart showing an operating state, and FIG. 4 is a view showing an example of a conventional press line. 5 ... Uncoiler as mandrel A ... Control device, 11 ... Detection device as detection means 12 ... Control unit as measurement means and control means 19 ... Drive motor, M ... Coil material

Claims (1)

[Claims] 1. A coil material supplied through a feeding device or the like is held in a processing machine such as a press machine, and the coil material is fed out or the coil material discharged from the processing machine is wound up according to the supply amount. In the mandrel for detecting the upper limit position and the lower limit position of the loop of the coil material, and the measuring means for measuring the time until the coil material reaches from the lower limit position of the loop to the upper limit position or from the upper limit position to the lower limit position of the loop. When,
When the coil material reaches the upper limit position and the lower limit position of the loop on the basis of the detection signal of the detection means, the mandrel drive motor is switched between on and off and driven based on the time measured by the measurement means. A control device for a mandrel, comprising a control means for switching the rotation speed of a motor for use in several stages.