WO2023042816A1

WO2023042816A1 - Press system and method for controlling press system

Info

Publication number: WO2023042816A1
Application number: PCT/JP2022/034158
Authority: WO
Inventors: 慎治小新井; 繁伊東; 光司岩田
Original assignee: 株式会社アマダ; 株式会社アマダプレスシステム
Priority date: 2021-09-14
Filing date: 2022-09-13
Publication date: 2023-03-23
Also published as: JP2023042420A

Abstract

Provided are a press system and a method for controlling a press system that can minimize reductions in productivity even when close to the end of a coiled material. A loop table 300 comprises operation switching sensors 341, 342 and an abnormality sensor 330 that detect the presence or absence of a loop in a state in which a brake roll 250 is sandwiching an end of the coiled material. Even if the brake roll 250 has sandwiched the end of the coiled material, the press system executes a continuous operation for continuously operating a feeder 400 and a press device 500 until the operation switching sensors 341, 342 or the abnormality sensor 330 detect the absence of a loop. When the operation switching sensors 341, 342 or the abnormality sensor 330 detect the absence of a loop, the press system stops the press device 500 and feeds a predetermined feed length of the coiled material by means of the feeder 400 at a lower feeding rate than a feeding rate during the continuous operation.

Description

PRESS SYSTEM AND PRESS SYSTEM CONTROL METHOD

The present invention relates to a press system and a control method for the press system.

Conventionally, uncoiler, leveler, loop table, feeder, and press equipment are arranged in order from upstream to downstream in the conveying direction of coiled material. There is a system (see, for example, Patent Document 1). In such a press system, the setup process is often automated. For example, when the coil material (work) runs out in the uncoiler, in each device arranged downstream from the uncoiler, the processing operation performed on the end of the coil material (hereinafter referred to as the end processing operation) is also Automated.

Here, if the device continues to operate normally without detecting the end of the coil material, especially in a tandem line press system, the end of the coil material may damage each device of the tandem line or damage the coil material itself. . Therefore, after shifting to the terminal processing operation, depending on the feed length and line speed, the continuous operation in which the feeder and the press device operate continuously, and the alternate operation in which the feeder and the press device operate alternately It may be driving. Specifically, when the feed length is less than the predetermined length and the line speed is less than the predetermined line speed, the feeder and press apparatus are continuously operated while the end processing operation is performed. On the other hand, when the feed length is greater than or equal to the predetermined length and the line speed is greater than or equal to the predetermined line speed, the feeder and the press are alternately operated, and the end processing operation is performed. By doing so, it is possible to prevent the end of the coil material from damaging each device of the tandem line and the coil material itself from being damaged.

JP 2006-224165 A

However, in a large-sized tandem line press system, processing is performed such that the feed length is equal to or greater than a predetermined feed length and the line speed is equal to or greater than a predetermined line speed. . For this reason, in such a press system, there is a problem that productivity decreases when shifting to the termination processing operation. Therefore, in the tandem line press system, it is required to prevent the productivity from deteriorating as much as possible even in a state near the end of the coil material.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a press system and a control method of the press system that can prevent productivity from being lowered as much as possible even in a state near the end of a coil material. Let it be an exemplary problem.

In order to solve the above problems, one aspect of the present invention has the following configuration.
(1) A correcting device for correcting the curl of a coil material, comprising an end detecting means for detecting the end of the coil material, and clamping the end of the coil material when the end detecting means detects the end of the coil material. The correction device having a clamping means for
a press device for processing the coil material;
a feeding device for feeding the coil material of a predetermined feeding length to the press device at a predetermined feeding speed;
A loop forming device that bends the coil material to form a loop between the straightening device and the feeding device, wherein the clamping means that clamps the end of the coil material detects the timing at which the coil material is released. and a support portion that rises as the loop rises and supports the loop;
a control means for controlling the straightening device, the pressing device, the feeding device and the loop forming device;
A press system comprising
The loop forming device has a loop detection means for detecting the presence or absence of the loop in a state where the clamping means clamps the terminal end of the coil material,
The control means continuously operates the feed device and the press device until the loop detection means detects the absence of the loop even after the clamping means has clamped the end of the coil material. When the loop detection means detects the absence of the loop, the press device is stopped, and the feed device feeds the predetermined feed length at a feed speed slower than the feed speed during the continuous operation. A press system that delivers the coiled material of length.

Further objects or other features of the present invention will be made clear by preferred embodiments described below with reference to the accompanying drawings.

According to one aspect of the present invention, it is possible to provide a press system and a control method of the press system that can prevent productivity from being lowered as much as possible even in a state near the end of the coil material.

FIG. 1 is a schematic front view showing the configuration of the press system of the embodiment. FIG. 2 is a block diagram of the press system of the embodiment. FIG. 3 is a schematic front view showing the configuration of the loop table of the embodiment. FIG. 4 is a schematic perspective view showing the configuration of the press device of the embodiment. FIG. 5 is a flow chart showing the termination processing operation of the embodiment.

In the following explanation, the operation including machining, which is performed while the end of the coil material is not detected, is called the normal processing operation. In the normal processing operation, the press machine continuously performs processing without stopping its operation, with the highest priority on productivity, and the feeder continuously supplies the coil material to the press machine according to the operation of the press machine. called driving. On the other hand, an operation including processing performed after detecting the end of the coil material is called a termination processing operation, and safety is considered more important than productivity. In addition, the height of the coil material being conveyed in the press system while it is being processed by the press device of the press system (for example, the height based on the floor surface where the press system is installed) is the processing height. Said. The length of the coiled material fed by the feeder in one feeding operation is called the feeding length (millimeters (mm)), and the speed at which the coiled material is fed in one feeding length is called the feeding speed. The feeding length is the length that the feeder feeds the coiled material to the pressing device each time the pressing device performs processing (also expressed as one stroke).

Furthermore, the length that the coil material is fed per minute, which is obtained by multiplying the number of rotations of the pressing device (the number of times of striking per minute) by the feeding length, is called the line speed (meters per minute (m/min)). In the press system, the maximum feed length (hereinafter referred to as maximum feed length) and the maximum line speed (hereinafter referred to as maximum line speed) are included in the index representing the performance of the press system.

[Embodiment]
<Press system>
FIG. 1 is a schematic front view showing the configuration of a press system 1 of this embodiment. FIG. 1 also shows the conveying direction, upstream, and downstream of the coil material. A press system 1 of this embodiment includes an uncoiler 100 , a leveler 200 , a loop table 300 , a feeder 400 and a press device 500 . The uncoiler 100 , leveler 200 , loop table 300 and feeder 400 operate in conjunction with the processing operation of the press device 500 . A press system 1 is installed on a floor surface 10 . Note that the loop table 300 is installed in a pit 305 provided below the floor surface 10 .

FIG. 2 is a block diagram of the press system 1 of this embodiment. In the following description, configurations and functions of each device will be described with reference to FIGS. 1 and 2. FIG.

<Uncoiler>
The uncoiler 100 , which is a holding device for holding the coil material 120 , has a mandrel 110 , a control section 130 and a drive section 140 . The mandrel 110 holds a coiled material 120 that is an object to be processed by the pressing device 500 . For example, the inside diameter of the coiled material 120 is held by the mandrel 110 . The control unit 130 causes the driving unit 140 to rotate the mandrel 110 and unwind the coil material 120 so as to be interlocked with the processing operation by the press device 500 .

The uncoiler 100 supplies the coiled material 120 to the leveler 200 at a constant speed until the coiled material 120 runs out. In other words, the uncoiler 100 supplies the coiled material 120 at a speed corresponding to the operation of the feeder 400 and the press device 500, but does not repeat operation and stop like the feeder 400, but operates continuously.

<Leveler>
The leveler 200 functions as a straightening device that straightens curls and the like attached to the coil material 120 held by the uncoiler 100 . The leveler 200 supplies the coiled material 120 to the loop table 300 at a constant speed until it shifts to the terminating operation described later. That is, the leveler 200 conveys the coiled material 120 at a speed corresponding to the operation of the feeder 400 and the press device 500, but does not repeat operation and stop like the feeder 400, but operates continuously.

The leveler 200 has a leveler entrance sensor 210 , an entrance roll 220 , a plurality of work rolls 230 , a brake roll entrance sensor 240 , a brake roll 250 , a control section 260 , a storage section 270 , a cylinder 280 and a motor 290 . In addition, in FIG. 1, each sensor is represented by a black inverted triangle, and the same applies to the apparatus to be described later.

The leveler entrance sensor 210 has, for example, a light emitting section (not shown) that emits light and a light receiving section (not shown) that receives the light emitted by the light emitting section. When the coil material 120 is at the position of the leveler entrance sensor 210, the light emitted from the light emitting unit is blocked by the coil material 120, and the leveler entrance sensor 210 outputs, for example, a low level signal. On the other hand, when the end of the coil material 120 passes the position of the leveler entrance sensor 210, the light emitted from the light emitting part is received by the light receiving part (hereinafter also referred to as light transmission), and the leveler entrance sensor 210 is at a high level, for example. signal. However, from the viewpoint of safety consideration, if the light shielding state is on the safe side or in steady state, a high level signal is output at that time, and a low level signal is output in unsafe or non-steady state. It may be to

By monitoring the level of the signal output from the leveler entrance sensor 210 , the control section 260 can determine whether the end of the coil material 120 has passed through the position of the leveler entrance sensor 210 . Specifically, the control unit 260 determines that the end of the coil material 120 has passed based on the signal output from the leveler inlet sensor 210 changing from low level to high level. Hereinafter, passing the end of the coil material 120 at the leveler entrance sensor 210 is expressed as detecting the end, and the same applies to other sensors. Note that the leveler entrance sensor 210 may be a sensor capable of detecting the end of the coil material 120, and the logic of the output signal may be reversed. may be in other aspects. Hereinafter, the fact that the controller 260 has determined that the end of the coiled material 120 has passed based on the detection result of the leveler entrance sensor 210 may also be expressed as that the leveler entrance sensor 210 has detected the end of the coiled material 120 . .

The entrance roll 220 is a roll for receiving the coiled material 120 loosened by the uncoiler 100 into the leveler 200 and conveying it to the work rolls 230 . The inlet rolls 220 are closed to hold the coiled material 120 and open to release the coiled material 120 from the held state.

The work roll 230 corrects the curl or the like of the coil material 120 in the closed state. The plurality of work rolls 230 are, for example, alternately arranged with steps, that is, arranged in a zigzag arrangement. The curl and the like attached to the coil material 120 are gradually corrected from the side to the downstream side.

The brake roll entrance sensor 240 functions as an end detection means for detecting the end of the coil material 120 by detecting the presence or absence of the coil material 120 . Since the configuration of the brake roll entrance sensor 240 can be the same as that of the leveler entrance sensor 210, the description thereof will be omitted.

The brake rolls 250 are closed to sandwich the coil material 120 and open to release the coil material 120 . The brake roll 250 becomes a closed state when the brake roll entrance sensor 240 detects the terminal end of the coil material 120 and functions as clamping means for clamping the coil material 120 . The brake roll 250 is open during normal processing operations. When the brake roll 250 is in the open state, the brake roll 250 may be rotated by the motor 290, or may have transmission means such as a clutch so that the drive of the motor 290 is not transmitted by the transmission means. , that is, the rotation may be stopped. When the end of the coil material 120 is detected by the leveler entrance sensor 210 and the end processing operation is started, the brake roll 250 is shifted from the open state to the closed state by the cylinder 280 .

When the end of the coil material 120 is detected by the brake roll entrance sensor 240, the brake roll 250 stops rotating by stopping the drive by the motor 290, and enters a state in which the end of the coil material 120 is clamped in the closed state. maintain. This state is hereinafter referred to as the leveler 200 being stopped.

The cylinder 280 switches between the closed state and the open state of the inlet roll 220 and the brake roll 250 . Motor 290 drives the rotation of inlet roll 220 , work roll 230 and brake roll 250 . It is sufficient that the cylinder 280 is of a reciprocating type, and for example, it is possible to use a spring.

The control unit 260 controls the cylinder 280 and the motor 290 in conjunction with the operation of the other devices of the press system 1 to correct the curl of the coil material 120 and feed the coil material 120 to the loop table 300 ( (Also referred to as supplying or conveying). It is assumed that the control unit 260 controls the rotation of the entrance roll 220, the work rolls 230, and the brake rolls 250 by a known method using detection means (not shown) such as an encoder. Similarly, the control unit 260 controls switching between the open state and the closed state of the entrance roll 220 and the brake roll 250 by a known method.

The control unit 260 controls the leveler 200 while interlocking with other devices of the press system 1 according to various programs stored in the storage unit 270 . The storage unit 270 stores, for example, the speed at which the coil material 120 is conveyed, and the control unit 260 conveys the coil material 120 in accordance with the feeder 400 and the press device 500 . Note that the leveler 200 may have a display section and an input section.

<Loop table>
FIG. 3 is a schematic front view showing the configuration of the loop table 300. As shown in FIG. The loop table 300 has a speed difference (hereinafter referred to as It is provided to absorb the speed difference). Specifically, the loop table 300 bends the coil material 120 downward to form a loop-shaped portion (hereinafter, simply referred to as a loop), so that the coil material 120 has a buffer during the transfer process. As a result, the loop table 300 absorbs the difference in conveying speed of the coil material 120 between the feed speed on the inlet side (leveler 200 side) and the discharge speed on the outlet side (feeder 400 side) of the loop table 300 . The length of the loop formed in the pit 305 is also referred to as the loop amount. When the loop length is long, the loop amount is expressed as large, and when the loop length is short, the loop amount is expressed as small. In FIG. 1, the case where the loop amount is small is indicated by a solid line, and the case where the loop amount is large is indicated by a broken line. The loop table 300 functions as a loop forming device that bends the coiled material 120 between the leveler 200 and the feeder 400 to form a loop.

(Loop amount)
Here, the speed at which the leveler 200 supplies the coil material 120 is hereinafter referred to as the supply speed of the leveler 200 . Further, the speed at which the feeder 400 supplies the coil material 120 to the press device 500 is hereinafter referred to as the consumption speed of the feeder 400 . When the consumption speed of the feeder 400 is faster than the supply speed of the leveler 200, the loop amount becomes small and the lowest position (hereinafter referred to as the lowest point) of the loop within the pit 305 becomes high. On the other hand, when the supply speed of the leveler 200 is faster than the consumption speed of the feeder 400, the loop amount increases and the lowest point of the loop within the pit 305 decreases. Since the feeder 400 operates in synchronization with the operation of the press device 500, even if the consumption speed of the feeder 400 exceeds the supply speed of the leveler 200, the consumption speed of the feeder 400 is zero during the processing operation of the press device 500. is. Therefore, as long as the feeding speed of the leveler 200 matches the average speed of the consumption speed of the feeder 400 taking into account the time during which the consumption speed of the feeder 400 is zero, the loop amount can be extremely increased or decreased. no.

A pit 305 having a predetermined depth is provided downward from the floor surface 10 between the leveler 200 and the feeder 400 , and the loop table 300 is provided in and above the pit 305 . Here, for example, in a large press system 1 having a length (total length) from the uncoiler 100 to the press device 500 of about 25 m, the maximum feed length is 1000 mm to 2500 mm, and the maximum line speed is 50 m / min to 80 m / min. Assume that In such a large press system 1, the predetermined depth of the pit 305 is, for example, 5 m, and the height from the floor surface 10 to the working height is, for example, 2 to 3 m. Here, the coil material 120 used in such a press system 1 has, for example, a width (length in the direction orthogonal to the conveying direction) of 2 m and a plate thickness of 0.6 mm to 9 mm. Note that these numerical values may be determined according to the scale of the press system 1, the type of processing (in other words, the type of mold attached to the press device 500), and the like. The processing height is indicated by a dashed line in FIG.

The loop table 300 has a table 310 , a contact sensor 312 , an encoder 315 , a loop sensor 321 , a loop sensor 322 , a loop sensor 323 , an abnormality sensor 330 , an operation switching sensor 341 , an operation switching sensor 342 and an exhaust sensor 350 . The loop table 300 further has a control section 360 , a storage section 370 and a motor 380 . FIG. 3 also shows the transport direction, upstream, downstream, and vertical directions.

The table 310 supports loops of the coiled material 120 formed within the pit 305 . The table 310 functions as a support that rises as the loop rises and supports the loop. A contact sensor 312 is provided on the table 310 . The contact sensor 312 is used by the controller 360 to determine whether the loop of the coil material 120 is in contact with the table 310 . The contact sensor 312 may be, for example, a piezoelectric sensor, a conductive sensor, etc., as long as it can detect that the loop is in contact with the table 310 .

The table 310 can be lowered, for example, to the position of the table 310L indicated by the two-dot chain line in FIG. The table 310 supports the coiled material 120 that has reached the maximum loop amount that can be formed by the loop table 300 at the position of the table 310L. Note that the table 310L may be movable to a position below this position. Also, the table 310 can be raised to the position of the table 310H similarly indicated by the two-dot chain line. The table 310 can safely receive the dispensed coil material 120 described later at the position of the table 310H. Note that the table 310H may be movable to a position above this position.

A table 310A indicated by a dashed line indicates a state in which the upper surface of the table 310 is lower than the discharge sensor 350 and at a height h1 above the floor surface 10. Hereinafter, h1 is the material dischargeable height. Said. Here, when the leveler 200 shifts to the terminal processing operation and further opens the terminal end, the brake roll 250 changes from the closed state to the open state to open the terminal end of the coil material 120, and the coil material 120 falls onto the table 310. . The material dischargeable height h1 is set to such a height that the dropped coil material 120 is not damaged. For example, in this embodiment, the material dischargeable height h1 is set at a position slightly higher than the floor surface 10 . The fixed height h2 indicated by the dashed-dotted line will be described later.

The encoder 315 detects the height of the table 310 and notifies the control unit 360 of the height information of the table 310 . For example, the control unit 360 determines that the table 310 has reached the material dischargeable height h1 based on the detection result of the encoder 315, and notifies the control unit 260 of the leveler 200. FIG. The same is true for the constant height h2.

The loop sensor 321, the loop sensor 322, the loop sensor 323, the abnormality sensor 330, the operation switching sensor 341, the operation switching sensor 342, and the discharge sensor 350 may all have the same configuration as the leveler entrance sensor 210 described above. Description of is omitted. These sensors switch the logic of the signal output to the control unit 360 depending on whether there is a loop or not. In the following description, detection of a loop means that a loop exists at the position (height) of each sensor. On the other hand, if the loop is not detected, it means that the lowest point of the loop moves upward from the bottom at the position (height) of each sensor, and there is no loop at that sensor position. means to detect the height of the lowest point of the loop. For this reason, hereinafter, the fact that the loop is no longer detected by these sensors may be expressed as the detection of the height of the loop.

The loop sensor 323 is located within the pit 305 and near the lowest position where the table 310 can descend. The loop sensor 322 is arranged in the pit 305 at a position higher than the loop sensor 323 . The loop sensor 321 is positioned within the pit 305 at a position higher than the loop sensor 322 and at which the loop amount is the smallest within a range (permissible range) in which processing by the press system 1 is performed normally, or at that position. placed at a lower position than

The detection results of the loop sensor 321, the loop sensor 322, and the loop sensor 323 are such that the supply speed of the leveler 200 and the average speed of the consumption speed of the feeder 400, which takes into account the time during which the consumption speed of the feeder 400 is zero, coincide with each other. Control section 360 is used to control the formation of an appropriate amount of loop within pit 305 during normal processing operations. The control unit 360 monitors the detection results of the loop sensor 321, the loop sensor 322, and the loop sensor 323 during machining in the normal processing operation, and the loop amount is between the height of the loop sensor 321 and the height of the loop sensor 323. In this way, the controller 260 of the leveler 200 and the controller 440 of the feeder 400, which will be described later, are notified.

Here, for example, the loop amount may become small for some reason during normal processing operation, and if the loop amount becomes even smaller, the press system 1 and processing may be affected. In such a case, the abnormality sensor 330 is provided to detect the loop that has become smaller and to safely stop the press system 1 or reduce the line speed until an appropriate loop amount is reached. ing. That is, the abnormality sensor 330 functions as abnormality detection means for detecting that the amount of the loop becomes smaller than a predetermined amount when the end of the coil material 120 is not detected by the brake roll entrance sensor 240 . The abnormality sensor 330 is provided at a position where the lowest point is the highest or a position lower than that position in the loop amount that allows the press system 1 to continue processing normally during normal processing operation. In this embodiment, the abnormality sensor 330 is arranged in the vicinity of the floor surface 10, for example, inside the pit 305 which is lower than the floor surface 10. FIG.

When the control unit 360 determines that the loop amount has decreased based on the detection result of the abnormality sensor 330, the control unit 360 notifies the control units of the other devices of the press system 1 of the information, and controls the other devices of the press system 1. The unit stops each device according to the notified information.

The operation switching sensor 341, the operation switching sensor 342, and the abnormality sensor 330 are sensors used for control during the termination processing operation of this embodiment. It should be noted that the abnormality sensor 330 switches its function between the role during normal operation described above and the role of termination processing operation described later, depending on the transition of the operating state. When the operation switching sensor 341 or the operation switching sensor 342 no longer detects a loop, the control unit 360 notifies the control unit of a predetermined device to switch from continuous operation to non-continuous operation described later. A controller of a predetermined device of the press system 1 switches from continuous operation to non-continuous operation in response to a notification from the controller 360 . The

operation switching sensors

341 and 342 can also be said to be switching detection means for detecting the timing of switching from continuous operation to non-continuous operation, which will be described later. In other words, the position of the operation switching sensor 341 or the operation switching sensor 342 is determined according to the type of feed length range in which the feeder feeds the coil material to the press device each time the press device performs processing. Since the abnormality sensor 330 is a sensor that is also used during normal operation, another sensor may be provided if the type of feed length range does not match.

The operation switching sensor 341 of this embodiment is provided at a position lower than the abnormality sensor 330 . The operation switching sensor 342 is provided at a position lower than the operation switching sensor 341 and higher than the loop sensor 321 . The

operation switching sensors

341 and 342 function as loop detection means for detecting the presence or absence of a loop while the brake roll 250 is holding the coil material 120 . The number of operation switching sensors (341, 342) may be increased or decreased depending on the convenience of the press system 1.

Here, the abnormality sensor 330 described above is used for the same purposes as the

operation switching sensors

341 and 342 after the timing at which the leveler entrance sensor 210 detects the end of the coil material 120 . That is, the abnormality sensor 330 is included in the loop detection means after the end of the coil material 120 is detected by the brake roll entrance sensor 240 . It can be said that the abnormality sensor 330 functions as one of switching detection means for detecting the timing of switching the press system 1 from continuous operation to non-continuous operation when the end of the coiled material 120 is detected by the leveler entrance sensor 210 . .

(Proper use of

operation switching sensors

341, 342 and abnormality sensors)
Here, how to properly use the three sensors will be described. The three sensors are selectively used based on the feed length and/or line speed according to the processing that the press system 1 is performing. For example, in the present embodiment, three sensors are selectively used according to the feed length L as shown in Table 1 to simplify the explanation.

In the press system 1, the longer the feed length L, the earlier it is necessary to switch from continuous operation to non-continuous operation, in other words, while the loop amount is large (the height of the lowest point of the loop is low). For this reason, the abnormality sensor 330, which is located at the highest position among the three sensors, is used for machining with a feed length L of L1 or less. The operation switching sensor 341, which is located at the next highest position after the abnormality sensor 330, is used when the feed length L is longer than L1 and less than or equal to L2. Among the three sensors, the operation switching sensor 342, which is located at the lowest position, is used when the feed length L is longer than L2 and less than or equal to L3. In this way, the

operation switching sensors

341 and 342 and the abnormality sensor 330 are provided at positions lower than the discharge sensor 350, and are provided at positions with different heights depending on the feed length. The

operation switching sensors

341 and 342 and the abnormality sensor 330 are provided at higher positions as the feed length is shorter. Therefore, it can be said that the

operation switching sensors

341 and 342 and the abnormality sensor 330 are height detection means for detecting the height of the loop. The feed length L has a relationship of L1<L2<L3, and its position is determined by the type of feed length range in which the feeder feeds the coil material to the press device each time the press device performs processing. is any numeric value

The height of the position of the abnormality sensor 330 is not determined according to the feed length, but is determined according to the timing at which an abnormality is detected during the normal processing operation. . Therefore, the positional relationship (height relationship) between the

operation switching sensors

341 and 342 whose height is determined according to the feed length and the abnormality sensor 330 is the above-described positional relationship, that is, the abnormality sensor 330 is one of the three sensors. It is not limited to the positional relationship of being provided at the highest position among them. For example, the abnormality sensor 330 may be provided at the lowest position among the three sensors, or may be provided between the operation switching sensor 341 and the operation switching sensor 342 .

The positions of the

operation switching sensors

341 and 342 are determined by the discharge sensor 350 when the feeder 400 feeds the coil material 120 of the feeding length L for one feed to the press device 500 after these sensors detect the loop. It is provided at a position (height) to detect the material 120 . Note that the

operation switching sensors

341 and 342 are set at a position (height) such that the discharge sensor 350 does not yet detect the coil material 120 even if the feeder 400 feeds the coil material 120 of the feed length L for one feed to the press device 500 . ) may be provided.

The ejection sensor 350 is used to determine the timing of opening the brake roll 250 of the leveler 200 that clamps the end of the coil material 120 from the closed state (discharge timing, which will be described later). The discharge sensor 350 is used to determine the timing at which the brake rolls 250 holding the coil material 120 release the coil material 120 and functions as discharge detection means for detecting the coil material 120 .

The discharge sensor 350 is provided at a position higher than the abnormality sensor 330 and lower than the processing height. In this embodiment, it is provided at a position higher than the floor surface 10 and lower than the processing height. The discharge sensor 350 does not detect the coiled material 120 during normal processing operation, but detects the coiled material 120 after switching to the termination processing operation.

The end of the coiled material 120 is detected by the leveler entrance sensor 210 of the leveler 200 and closed, and the brake roll 250 whose end of the coiled material 120 is detected by the brake roll entrance sensor 240 and stops rotating maintains the clamping of the coiled material 120. are doing. In this state, when the feeder 400 continues to feed the coiled material 120, the loop rises and the coiled material 120 is detected by the discharge sensor 350 before long. Then, the control unit 360 notifies the control unit 260 of the leveler 200 to open the brake roll 250 from the closed state to open the coil material 120 . Control unit 260 of leveler 200 controls cylinder 280 to open brake roll 250 from the closed state in response to this notification. The operation of releasing the end of the coil material 120 by stopping the rotation of the brake rolls 250 holding the end of the coil material 120 is also called payout.

The control unit 360 controls the motor 380 based on the detection result of the contact sensor 312 according to various programs stored in the storage unit 270 so that the table 310 contacts the loop, in other words, the table 310 follows the loop. The motor 380 is controlled as follows. When the table 310 comes into contact with the loop, the control unit 360 temporarily stops lifting the table 310 . When the loop then rises and leaves table 310, controller 360 raises table 310 until table 310 contacts the loop. By repeating this operation, the control unit 360 causes the table 310 to follow the loop.

Further, the control unit 360 causes the control units of the other devices of the press system 1 to perform predetermined control based on the detection results of the

loop sensors

321, 322, 323, the abnormality sensor 330, the

operation switching sensors

341, 342, and the discharge sensor 350. to notify you to do so. The motor 380 is, for example, a geared motor or the like, and raises the table 310 so that the table 310 can follow the loop. For the motor 380, for example, an inexpensive motor with low accuracy in acceleration control/deceleration control and a low upper limit of rising speed may be used.

<Feeder>
The feeder 400 is a feeding device that feeds the coil material 120 to the pressing device 500 at a predetermined feeding speed and by a predetermined feeding length. The feeder 400 has a feed roll 410 ,

end sensors

420 and 430 , a control section 440 , a storage section 450 , a cylinder 460 and a motor 470 .

The feed roll 410 functions as feeding means for feeding the coiled material 120 to the press device 500 . After the slide 512 of the press device 500 finishes processing and separates from the coil material 120 , the feed roll 410 is closed and the coil material 120 is sent out to the press device 500 . . The feed rolls 410 send out (supply) the coil material 120 to the press device 500 at a set feed length and feed speed according to the processing performed by the press device 500 . The feed rolls 410 are in an open state to release the coil material 120 while processing is being performed in the press device 500 . It should be noted that it is also possible to set the coil material 120 to be held while maintaining the closed state in consideration of all circumstances.

The

end sensors

420 and 430 detect the end of the coiled material 120 in the feeder 400 after the end of the coiled material 120 is released by the leveler 200 . When the end of the coil material 120 is detected by the

end sensors

420 and 430, the control unit 440 stops the feeder 400 and notifies the later-described controller 514 of the press device 500 to stop the press device 500. FIG.

Here, the feed length differs according to the processing performed by the press device 500, and the timing at which the end of the coil material 120 should be detected differs according to the feed length. That is, it is necessary to detect the terminal end of the coil material 120 at an earlier timing for processing with a longer feed length. Therefore, in this embodiment, as shown in Table 2, the two

end sensors

420 and 430 are used properly.

For example, the end sensor 420 is provided upstream of the feed roll 410 in the conveying direction and near the feed roll 410 . The end sensor 420 is used, for example, during machining with a feed length L less than L4. On the other hand, for example, the end sensor 430 is provided upstream of the end sensor 420 in the transport direction. The terminal end sensor 430 is used, for example, during machining where the feed length L is greater than or equal to L4 and less than L5. In this embodiment, the end sensor 430 is provided downstream of the loop table 300 in the conveying direction. be. In other words, the number of end sensors and the positions to be arranged may be determined according to the feed length L. The feed length L has a relationship of L4<L5, and its position is determined according to the type of feed length range in which the feeder feeds the coil material to the press device each time the press device performs processing. Any numeric value.

The cylinder 460 switches between a closed state in which the feed rolls 410 sandwich the coil material 120 and an open state in which the coil material 120 is not sandwiched. Motor 470 drives rotation of feed roll 410 .

The control unit 440 sends out the coil material 120 to the press device 500 by controlling the cylinder 460 and the motor 470 in conjunction with other devices of the press system 1 . It is assumed that the control unit 440 controls the rotation of the feed roll 410 by a known method using detection means such as an encoder. Similarly, the control unit 440 controls switching between the open state and the closed state of the feed rolls 410 by a known method.

The control unit 440 controls the feeder 400 while interlocking with other devices of the press system 1 according to various programs stored in the storage unit 450 . The storage unit 450 stores, for example, a feed length and a feed speed in association with each process, and the control unit 440 feeds the coil material at a predetermined feed length and a predetermined feed speed in accordance with the processing of the press device 500. Send out 120. Note that the storage unit 450 of this embodiment stores two feed speeds for a predetermined feed speed for sending out a predetermined feed length in a predetermined machining. One is the feed speed during continuous operation (first feed speed), and the other is the feed speed during discontinuous operation (second feed speed), which is slower than the feed speed during continuous operation and will be described later. . Note that the feeder 400 may have a display section and an input section.

<Press device>
The press device 500 in FIG. 1 will be described with reference to FIG. 4 as well. FIG. 4 is a schematic perspective view showing the configuration of a press device 500 of the present embodiment, for example, a schematic view of an integrated straight side frame type or C frame type press device 500. As shown in FIG. 4 shows the conveying direction of the coil material 120, the upstream, the downstream, the vertical direction in the conveying direction, and the front and rear directions (front and rear). The press device 500 includes a drive motor 504 (driving means), a transmission mechanism 506, a crankshaft 508, a connecting rod 510, a slide 512, and a bolster 522 inside and outside a housing 502. As shown in FIG. The press device 500 also has a controller 514 , a storage section 515 , a display section 516 and an input section 518 . Furthermore, the press device 500 has a sensor 524 , a rotary encoder 525 and a gib 526 . The press device 500 of the present embodiment may be a progressive press device that performs progressive press processing (hereinafter referred to as progressive processing), in which case it has a plurality of processing stages.

The drive motor 504 is, for example, a servo-controlled servomotor, and vertically moves the mold 503, which will be described later, via a transmission mechanism 506, a crankshaft 508, and a connecting rod 510 while controlling the amount and direction of rotation. The transmission mechanism 506 includes transmission members such as gears and belts, and transmits the rotation of the motor shaft of the drive motor 504 to the crankshaft 508 . Control signals to drive motor 504 are sent from controller 514 .

The crankshaft 508 and connecting rod 510 are for converting the rotational movement of the motor shaft transmitted by the transmission mechanism 506 into reciprocating movement (vertical movement in this embodiment). The rotation of the motor shaft causes the crankshaft 508 to rotate, and the rotation is transmitted to a connecting rod 510 having one end connected to the crankshaft 508 to move the connecting rod 510 up and down.

Also, the crankshaft 508 is provided with a rotary cam switch (not shown) that outputs an ON signal or an OFF signal in conjunction with the rotation of the crankshaft 508 . The rotary cam switch outputs an ON signal or an OFF signal, for example, when the rotation of the crankshaft 508 reaches a predetermined angle, in other words, when it reaches a predetermined timing during machining operation. The timing at which the rotary cam switch outputs the ON signal (or OFF signal) is hereinafter referred to as output timing. The controller 514 interlocks with other devices of the press system 1 to perform machining operations based on signals output from the rotary cam switch.

A slide 512 is connected near the other end of the connecting rod 510 . As the connecting rod 510 moves up and down, the slide 512 moves up and down along the gib 526 . A bolster 522 is arranged to face the slide 512 in the press device 500 . An upper mold 503 a as a part of the mold 503 is attached to the surface of the slide 512 facing the bolster 522 (lower surface in this embodiment). A lower mold 503b that forms a pair with an upper mold 503a is mounted as part of the mold 503 on the surface of the bolster 522 facing the slide 512 (the upper surface in this embodiment).

The coil material 120 as an object to be processed is placed between the upper die 503a and the lower die 503b, and pressed by the upper die 503a and the lower die 503b. will be The coil material 120 is conveyed, for example, from the left (upstream) side to the right (downstream) side in FIG.

Specifically, the drive motor 504 rotates under the control of the controller 514 . Rotation of the drive motor 504 is transmitted to the connecting rod 510 via the transmission mechanism 506 and the crankshaft 508, and the slide 512 moves up and down. As the slide 512 moves downward, the upper die 503a and the lower die 503b are pressed, and the coil material 120 is pressed. That is, in the press device 500, the drive motor 504, the transmission mechanism 506, the crankshaft 508, the connecting rod 510, and the slide 512 constitute a press section. The transmission mechanism 506 is provided with a rotary encoder 525 which is rotation speed detection means for detecting the rotation speed of the crankshaft 508 . The controller 514 can detect the position of the slide 512 by detecting the number of revolutions of the crankshaft with the rotary encoder 525 .

The sensor 524, which is load detection means for detecting the load during processing, is a sensor for detecting the load acting on the connecting rod 510 when the press device 500 presses the coil material 120, and is, for example, a load cell. Sensors 524 may be, for example, strain gauges mounted on housing 502 . The sensor 524 may be installed at any position on the connecting rod 510 (for example, near the center). Furthermore, a plurality of sensors 524 may be installed. For example, the strain on the left and right sides of the housing 502 may be detected respectively, and the detected results may be added to obtain the total load. 4, the side where the display unit 516 is arranged is the front side of the press device 500. As shown in FIG.

The controller 514 controls the press device 500 according to various programs stored in the storage unit 515. A display unit 516 displays data indicating the state of the press device 500 . An input unit 518 is used to input data necessary for operating the press device 500 . The input unit 518 is used when the user inputs parameters necessary for processing. The controller 514 controls the press device 500 and other devices of the press system 1 to work together.

Also, it is assumed that the control unit and controller of each device of the press system 1 transmit and receive information and signals to and from other devices using known communication means. 1 and 2, the controller of each device of the press system 1 operates in cooperation with other controllers, but the present invention is not limited to this. For example, a control section that controls the entire press system 1 may be provided separately, and the control section that controls the entire control section may control the control sections of the respective devices. Further, a predetermined device may be controlled by a control section of another device without having a control section, and the press system 1 as a whole may be in a mode in which the normal processing operation and the terminal processing operation can be controlled. Control unit 260 , control unit 360 , control unit 440 , and controller 514 are included in control means for controlling leveler 200 , loop table 300 , feeder 400 , press device 500 , in other words, press system 1 .

<Conventional termination processing operation>
A conventional termination processing operation will be described for comparison with the termination processing operation of this embodiment, which will be described later. When the end of the coiled material 120 is detected by the leveler entrance sensor 210 of the leveler 200, the press system 1 switches from the normal processing operation to the end processing operation. At this timing, the control unit 260 of the leveler 200 sets the speed for conveying the coil material 120 (hereinafter referred to as the operating speed) to a slower operating speed (hereinafter referred to as the normal operating speed) than the operating speed during the normal processing operation (hereinafter referred to as the normal operating speed). , called the terminal operating speed). The final operating speed is set, for example, to such a speed that the operation of the leveler 200 can be stopped immediately when the brake roll inlet sensor 240 is illuminated. After that, when the brake roll entrance sensor 240 detects the end of the coil material 120 , the controller 260 stops the rotation of the brake roll 250 by the motor 290 and stops the operation of the leveler 200 . As a result, the brake roll 250 , which is in a closed state and has stopped rotating, maintains a state in which the terminal end of the coil material 120 is clamped. As a result, the supply of the coil material 120 from the leveler 200 to the loop table 300 is stopped.

When the leveler 200 is operating at the terminal operating speed and the loop and the table 310 contact each other in the loop table 300, the control unit 260 stops the leveler 200 (including the brake roll 250). After the leveler 200 has been shut down, the controller 260 resumes operation of the leveler 200 at terminal operating speed when the loop is again off the table 310 due to the loop becoming smaller. The control unit 260 repeats this operation until the brake roll entrance sensor 240 detects the end of the coil material 120 after the end processing operation is started. The control unit 360 notifies the control unit 260 of contact/non-contact information between the loop and the table 310 based on the detection result of the contact sensor 312 .

On the other hand, the operations of the feeder 400 and the press device 500 differ according to the feed length and line speed of the processing being performed at that time. Here, in order to simplify the explanation, the case where the feed length is less than 500 mm and the line speed is less than 15 m / min is pattern 1, and the feed length is 500 mm or more and the line speed is 15 m / min or more is pattern 2. It will be explained later. Patterns 1 and 2 are also divided in the same way in this embodiment, which will be described later.

(Pattern 1)
For example, when the feed length is less than 500 mm and the line speed is less than 15 m/min, even if the leveler 200 stops, the press device 500 does not stop and continues continuous operation. Such an operation is expressed as pattern 1. In pattern 1, the amount of loops in the loop table 300 becomes smaller as the processing progresses, and the bottom point of the loops rises. In pattern 1, since the line speed is less than 15 m/min, it is possible for the table 310 to rise while following the rise of the loop.

When the loop rises and the table 310 eventually reaches the material discharge height h1 or more, or when the coil material 120 is detected by the discharge sensor 350, the control unit 260 of the leveler 200 causes the cylinder 280 to open the brake roll 250. state. That is, the control unit 260 causes the cylinder 280 to move the brake roll 250 by the cylinder 280 at the earlier timing of the timing when the table 310 reaches the height h1 or more at which the material can be discharged and the timing when the coil material 120 is detected by the discharge sensor 350. is in the open state. As a result, the end of the coil material 120 held by the brake rolls 250 is released (discharged) and discharged onto the loop table 300 .

In the case of pattern 1, continuous operation is continued, but even if the end of the coil material 120 is discharged, the table 310 follows the coil material 120 and rises to a predetermined height. 120 ends can be safely received. Therefore, the terminal end of the coil material 120 will not drop into the pit 305 and damage the device or facility due to failure to catch the terminal end of the coil material 120, and the coil material 120 itself will not be damaged.

After the delivery, the processing by the press device 500 further progresses, and when the end sensor 420 of the feeder 400 detects the end of the coil material 120, the control unit 440 of the feeder 400 stops the feeder 400 and the press device 500 is operated. Notifies the controller 514 to stop the press device 500 .

(Pattern 2)
Next, a case where the feed length is 500 mm or more or the line speed is 15 m/min or more will be described as pattern 2 below. In the case of pattern 2, if the pressing device 500 is operated continuously after the leveler 200 stops, the table 310 cannot follow the rise of the loop. This is because the table 310 is driven by a motor 380 such as a geared motor, and there is an upper limit to the speed at which the table 310 rises. If the end of the coil material 120 is ejected from the leveler 200 in such a state, the end of the coil material 120 may fail to be received, and the end of the coil material 120 may fall into the pit 305, damaging the device or equipment. Otherwise, the coil material 120 itself may be damaged. Also, if the end of the coil material 120 is ejected while the loop is rising at a high speed, the coil material 120 may jump upward, possibly damaging the device or equipment or damaging the coil material 120 itself.

Therefore, in pattern 2, conventionally, when the leveler 200 stops, the press device 500 moves the slide 512 to the top dead center to temporarily stop processing. On the other hand, the feeder 400 feeds the coiled material 120 for the feed length to the temporarily stopped press device 500 while reducing the feed speed of the feed rolls 410 . After the coiled material 120 has been sent out, the press device 500 reduces the number of revolutions and restarts the machining. In this way, the rotation speed of the press device 500 is lowered and the feeding speed of the feeder 400 is lowered, and an operation in which the feeder 400 and the press device 500 operate alternately (hereinafter referred to as alternate operation) is started.

Thus, in the case of conventional pattern 2, alternating operation is performed when the press system 1 shifts to the terminal processing operation. During alternating operation, the speed of the loop rise is slowed so that the table 310 can rise to the loop height and catch up with the loop. After that, while following the loop, the table 310 is lifted while repeating the operation of stopping when the loop is touched and rising when the loop is separated. Specifically, when the table 310 comes into contact with the loop, the table 310 is stopped by deceleration control, and when the loop is separated, the table 310 rises to a predetermined rising speed by acceleration control.

When the loop rises and the table 310 eventually reaches the material discharge height h1 or more, or when the coil material 120 is detected by the discharge sensor 350, the control unit 260 of the leveler 200 causes the cylinder 280 to open the brake roll 250. state. As a result, the end of the coil material 120 held by the brake rolls 250 is released, and the coil material 120 is discharged onto the loop table 300 . In pattern 2, alternate operation is performed so that the table 310 follows the loop. can accept. Therefore, the terminal end of the coil material 120 will not be received and will not fall into the pit 305 to damage the device or facility, and the coil material 120 itself will not be damaged.

When the end of the coil material 120 is discharged from the leveler 200, the feeder 400 and the press device 500 shift from alternate operation to continuous operation. Since the rest is the same as pattern 1, the description is omitted.

As described above, in the conventional pattern 2, the press system 1 is alternately operated from the stop of the leveler 200 to the discharge of the coil material 120 from the leveler 200, which poses a problem of reduced productivity. In particular, when the feed length is short (for example, 510 mm, etc.) among the conditions of Pattern 2, the decrease in productivity appears remarkably.

<Termination processing operation of the present embodiment>
In this embodiment, especially in pattern 2 described above, when the feed length is equal to or less than the predetermined feed length, the conventional alternate operation is not performed. In this embodiment, the press system 1 continues continuous operation even after the leveler 200 stops, and switches to non-continuous operation at the timing when the operation switching sensor 341, the operation switching sensor 342, or the abnormality sensor 330 cannot detect the loop. . As will be described later, the non-continuous operation refers to an operation in which the press device 500 stops, for example, once, and the feeder 400 feeds the coil material 120 for one feed length at a low speed during that time. Note that the operation of pattern 1 of the present embodiment is the same as the operation of conventional pattern 1, so the description is omitted.

FIG. 5 is a flowchart for explaining the termination processing operation of this embodiment. The press system 1 starts processing the coil material 120 at step (hereinafter referred to as S) 100 . In S<b>102 , the press system 1 determines whether or not the leveler entrance sensor 210 has detected the end of the coil material 120 by the control unit 260 of the leveler 200 . If the press system 1 determines in S102 that the leveler inlet sensor 210 has not detected the end of the coil material 120, the process returns to S102, and if it determines that the end has been detected, the process proceeds to S104.

At S104, the press system 1 starts the termination processing operation. Specifically, the control unit 260 of the leveler 200 closes the brake roll 250 via the cylinder 280 and changes the normal operating speed to the final operating speed. Note that the brake roll 250 is driven by the motor 290 to rotate. At this timing, the controller 440 of the feeder 400 and the controller 514 of the press device 500 also continue continuous operation.

In S106, the press system 1 determines whether or not the brake roll entrance sensor 240 has detected the end of the coil material 120 by the control unit 260 of the leveler 200. If the press system 1 determines in S106 that the brake roll entrance sensor 240 has not detected the end of the coil material 120, the process returns to S106, and if it determines that the end has been detected, the process proceeds to S108.

At S108, the press system 1 causes the control unit 260 of the leveler 200 to stop the rotation of the brake roll 250 via the motor 290. As a result, the terminal end of the coil material 120 is clamped by the brake rolls 250 that have stopped rotating, that is, the leveler 200 is stopped (nipping step). On the other hand, since the feed rolls 410 of the feeder 400 continue to operate continuously, the loop amount of the coil material 120 on the loop table 300 decreases and the lowest point of the loop rises (continuous operation process).

At this time, the table 310 follows the loop up to a constant height h2 and starts to rise. Here, the constant height h2 is a height different from the material dischargeable height h1, and is set at a position lower than the material dischargeable height h1 (h2<h1). The constant height h2 is set at a position slightly lower than the height of the loop when any of the

operation switching sensors

341 and 342 and the abnormality sensor 330 stops detecting the loop and the press device 500 is stopped. A slightly lower position is a position where the table 310 does not become the position of the

operation switching sensors

341 and 342 .

When the control unit 360 determines that the table 310 has risen to the constant height h2 based on the detection result of the encoder 315, it stops the table 310 from rising. This is because the table 310 may push up the loop if the table 310 rises to a position higher than the constant height h2 before the low-speed feeding process, which will be described later. Further, for example, when the rising speed of the table 310 is a speed that can sufficiently follow the rising of the loop, the

operation switching sensors

341 and 342 and the abnormality sensor 330 detect the table 310 instead of the loop, This is because there is a risk of erroneous detection. Here, that the

operation switching sensors

341 and 342 and the abnormality sensor 330 detect the table 310 means that the table 310 shields the

operation switching sensors

341 and 342 and the abnormality sensor 330 from light.

At S110, the press system 1 determines whether it is pattern 2 described above. If the press system 1 determines in S110 that it is pattern 1 instead of pattern 2, the process proceeds to S143, and if it determines that it is pattern 2, the process proceeds to S112. At S112, the press system 1 determines whether or not the feed length is equal to or less than a predetermined feed length. If the press system 1 determines in S122 that the feed length is longer than the predetermined feed length, the process proceeds to S146, and if it is determined that the feed length is equal to or less than the predetermined feed length, the process proceeds to S114. The predetermined feed length is, for example, L3 mentioned above. During the processing from S114 to S122, the feeder 400 and the press device 500 are in non-continuous operation.

In S114, the press system 1 controls the control unit 360 of the loop table 300 to determine whether the operation switching sensor 341, the operation switching sensor 342, or the abnormality sensor 330 cannot detect a loop, and whether the table 310 has risen to a certain height h2. to judge whether Here, as described above, which of the three sensors, the operation switching sensor 341, the operation switching sensor 342, and the abnormality sensor 330, is used to determine S112 is determined according to the feed length L. .

If the press system 1 determines in S114 that the above conditions are not satisfied, the process returns to S114. In S114, when the press system 1 determines that the operation switching sensor 341, the operation switching sensor 342, or the abnormality sensor 330 cannot detect a loop and that the table 310 has risen to a certain height h2, the process is started. Proceed to S116 (detection step).

At S116, the press system 1 stops lifting the table 310 of the loop table 300. In addition, the press system 1 causes the controller 514 of the press device 500 to temporarily operate the press device 500 without starting the processing of the coil material 120 to be sent next after finishing the processing performed at this timing. Stop (stop process). It should be noted that the control for temporarily stopping the press device 500 in the middle of processing is a known technique, and therefore description thereof will be omitted. Also, at this timing, the feeder 400 sets the feed speed (second feed speed) slower than the feed speed (first feed speed) during continuous operation (hereinafter referred to as , also known as a slow feed rate). The control unit 440 of the feeder 400 feeds the coiled material 120 of one feeding length at a low speed to the temporarily stopped pressing device 500 (hereinafter also referred to as low speed feeding) (low speed feeding step).

At S118, the press system 1 determines whether or not the low-speed feeding has been completed, that is, whether or not the coil material 120 has been fed for one feeding length at the low-speed feeding speed. If the press system 1 determines in S118 that the low-speed feeding has been completed, the process proceeds to S120, and if it determines that the low-speed feeding has not been completed, the process proceeds to S132. At S<b>120 , the press system 1 stops the feeder 400 and raises the table 310 via the motor 380 by the controller 360 of the loop table 300 . As described above, in the machining corresponding to pattern 2, the loop rises quickly and the table 310 cannot follow the loop. In this embodiment, the table 310 is raised after the low-speed feeding is completed.

At S122, the press system 1 uses the control unit 360 of the loop table 300 to determine by the contact sensor 312 whether or not the table 310 has come into contact with the loop, in other words, whether or not the table 310 has caught up with the loop. If the press system 1 determines in S122 that the table 310 is not in contact with the loop, it returns the process to S122, and if it determines that it is in contact, the process proceeds to S124. With the processing up to this point, in the present embodiment, even in pattern 2, the table 310 can safely receive the coil material 120 dispensed by the leveler 200 thereafter.

At S124, the press system 1 causes the control section 360 of the loop table 300 to stop the table 310 from rising. Also, the press system 1 causes the control unit 260 of the leveler 200 to open the brake roll 250 via the cylinder 280 . As a result, the end of the coil material 120 is released from the leveler 200 (discharge). At S126, the press system 1 shifts from non-continuous operation to continuous operation, resumes continuous operation, and ends the process. That is, the press device 500 resumes the temporarily stopped processing. It should be noted that the control for resuming the press device 500 that has been temporarily stopped is a well-known technique, and therefore the description thereof will be omitted. Also, the feeder 400 returns the feed speed of the feed rolls 410 from the low speed to the feed speed during continuous operation.

After this, the press system 1 determines whether or not the end sensor 420 or the end sensor 430 has detected the end of the coil material 120 by the controller 440 of the feeder 400 . Here, as described above, which of the two sensors, the end sensor 420 and the end sensor 430, is used is determined according to the feeding length L. When the end sensor 420 or the end sensor 430 detects the end of the coil material 120, the press system 1 terminates the processing being performed at that time and then stops the operation. Specifically, each device is stopped by the control unit of each device. It should be noted that the control of deceleration, for example, until the operation of the press system 1 is stopped is a well-known technology, and thus the description thereof will be omitted. After that, a new coiled material 120 is attached to the uncoiler 100, the starting end of the coiled material 120 is pulled out, and the coiled material 120 is set in each device, whereby the processing by the press system 1 is restarted.

At S132, the press system 1 determines whether or not the discharge sensor 350 has detected the coil material 120 by the control unit 360 of the loop table 300. If the press system 1 determines in S132 that the discharge sensor 350 has not detected the coil material 120, the process returns to S118, and if it determines that the coil material 120 has been detected, the process proceeds to S134. In S134, the press system 1 causes the controller 440 of the feeder 400 to temporarily stop the low-speed feeding. In S136, the press system 1 raises the table 310 by the controller 360 of the loop table 300. FIG.

At S138, the press system 1 uses the contact sensor 312 to determine whether the table 310 has come into contact with the loop by the control unit 360 of the loop table 300. If the press system 1 determines in S138 that the table 310 is not in contact with the loop, the process returns to S138, and if it is determined that the table 310 is in contact, the process proceeds to S140.

At S140, the press system 1 causes the control unit 360 of the loop table 300 to stop the table 310 from rising. Also, the press system 1 causes the control unit 260 of the leveler 200 to open the brake rolls 250 (discharge). Then, the press system 1 feeds the coil material 120 for the remainder of the feed length, which was stopped halfway by the feeder 400, to the press device 500 at a low feed speed. At S142, the press system 1 determines whether or not the low-speed feeding is completed. If it is determined that the low-speed feeding is not completed, the process returns to S142, and if it is determined that the low-speed feeding is completed, the process is resumed. Proceed to S126.

In the case of pattern 1 in S110, the press system 1 maintains continuous operation in S143. In S144, the press system 1 determines whether or not the table 310 is at a position higher than the material discharge height h1. Proceeding to S124, if it is determined that the position is not higher than the material dischargeable height h1, the process returns to S144. If the feed length is longer than the predetermined feed length in S112, the press system 1 shifts to alternate operation in S146 as in the conventional case. In S<b>147 , the press system 1 determines whether or not the discharge sensor 350 has detected the coil material 120 . If the press system 1 determines in S147 that the discharge sensor 350 has not detected the coil material 120, the process returns to S147, and if it determines that the coil material 120 has been detected, the process proceeds to S124.

As described above, in the press system of the present embodiment, even after the brake rolls have nipped the end of the coil material, the feeder and the Continuous operation is performed to continuously operate the press device. After that, when the operation switching sensor (or abnormality sensor) detects no loop, the press system stops the press device, and the feeder feeds at a feed speed slower than the feed speed during continuous operation, and feeds a predetermined feed length. Send out the coil material. Here, the press system stops the press device only once. As a result, even in a large-sized press system, it is possible to perform the termination processing operation without stopping the press device as much as possible. In addition, since the time during which the pressing device is stopped is the time during which the coil material 120 for one feeding length is conveyed, the time from when the pressing device is stopped until it is restarted can be shortened as much as possible. can.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications and changes are possible within the scope of the gist, such as the following modifications. .

For example, the loop table 300 may have detection means for detecting the height of the table 310, and control the elevation of the table 310 based on the detection result of this detection means.

For example, in the present embodiment, the feeding speed of the feed rolls 410 is reduced in S114 of FIG. 5 to feed the coil material 120 for one feeding length, but the present invention is not limited to this. For example, the rotation of the feed rolls 410 may be stopped for a predetermined period of time, in other words, the feeding of the coiled material 120 may be stopped, and after the table 310 catches up with the loop, the feeding speed may be reduced. In this way, the feed speed may be combined with low speed and stop.

For example, in S124 of FIG. 5, the feed speed of the feed roll 410 is returned from the low speed to the original feed speed. can be left as is.

For example, in the embodiment described above, the feeder 400 and the press device 500 are stopped when the

end sensors

420, 430 of the feeder 400 detect the end of the coil material 120 (Fig. 5 S128). However, after that, the remaining portion of the coiled material 120 may be further processed. For example, feeder 400 may comprise a known microfeeder (not shown). When the feeder 400 has a microfeeder, the remaining number of times that the pressing device 500 can perform processing is obtained based on the movement amount and feed length of the microfeeder. The microfeeder can restart the continuous operation or alternate operation of the press device 500 by conveying the coiled material 120 for the remaining number of times. The feeder 400 and the press device 500 stop when the coiled material 120 sent out by the microfeeder is processed the remaining number of times. Such control may be performed after the process of S126 in FIG.

As described above, according to the present embodiment, it is possible to provide a press system and a control method for the press system that can prevent productivity from being lowered as much as possible even in a state near the end of the coil material.

1 Press system 10 Floor surface 100 Uncoiler 110 Mandrel 120 Coil material 130 Control unit 140 Drive unit 200 Leveler 210 Leveler entrance sensor 220 Entrance roll 230 Work roll 240 Brake roll entrance sensor 250 Brake roll 260 Control unit 270 Storage unit 280 Cylinder 290 Motor 300 loop table 305

pits

310, 310H, 310L table 312 contact sensor 315

encoders

321, 322, 323 loop sensor 330

abnormality sensors

341, 342 operation switching sensor 350 discharge sensor 360 control section 370 storage section 380 motor 400 feeder 410 feed rolls 420, 430 End sensor 440 Control unit 450 Storage unit 460 Cylinder 470 Motor 500 Press device 502 Housing 503 Mold 503a Upper mold 503b Lower mold 504 Drive motor 506 Transmission mechanism 508 Crankshaft 510 Connecting rod 512 Slide 514 Controller 515 Storage unit 516 Display unit 518 Input Part 522 Bolster 524 Sensor 525 Rotary Encoder 526 Gib

Claims

A straightening device for correcting the curl of a coil material, comprising: end detection means for detecting the end of the coil material; and clamping means for clamping the end of the coil material when the end detection means detects the end of the coil material. and the correction device having
a press device for processing the coil material;
a feeding device for feeding the coil material to the press device at a predetermined feeding speed and by a predetermined feeding length;
A loop forming device that bends the coil material to form a loop between the straightening device and the feeding device, wherein the clamping means that clamps the end of the coil material detects the timing at which the coil material is released. and a support portion that rises as the loop rises and supports the loop;
a control means for controlling the straightening device, the pressing device, the feeding device and the loop forming device;
A press system comprising
The loop forming device has a loop detection means for detecting the presence or absence of the loop in a state where the clamping means clamps the terminal end of the coil material,
The control means continuously operates the feed device and the press device until the loop detection means detects the absence of the loop even after the clamping means has clamped the end of the coil material. When the loop detection means detects the absence of the loop, the press device is stopped, and the feed device feeds the predetermined feed length at a feed speed slower than the feed speed during the continuous operation. A press system that delivers the coiled material of length.
The press system according to claim 1, wherein the control means stops the press device only once when the loop detection means detects the absence of the loop.
The discharge detection means is provided at a position lower than the processing height of the correction device,
3. The press system according to claim 2, wherein said loop detection means is provided at a position lower than said ejection detection means, and a plurality of said loop detection means are provided at different heights.
The press system according to claim 3, wherein the loop detection means is provided at a higher position as the feed length is shorter.
The loop forming device has abnormality detection means for detecting an abnormality such that the amount of the loop becomes smaller than a predetermined amount when the end of the coil material is not detected by the end detection means,
5. The press system according to claim 3, wherein said abnormality detection means is included in said loop detection means after said end detection means detects the end of said coil material.
The press system according to claim 5, wherein the abnormality detection means is provided at the highest position among the plurality of loop detection means.
A straightening device for correcting the curl of a coil material, comprising: end detection means for detecting the end of the coil material; and clamping means for clamping the end of the coil material when the end detection means detects the end of the coil material. a press device for processing the coil material; a feeding device for feeding the coil material to the press device at a predetermined feed rate by a predetermined feed length at a time; the correction device and the feed; A loop forming device for forming a loop by bending the coil material between itself and a device, wherein the clamping means clamping the terminal end of the coil material is used to determine the timing of releasing the coil material. The loop forming device, which has discharge detecting means for detecting the coil material, and a supporting portion that rises as the loop rises and supports the loop, the correcting device, the pressing device, the feeding device, and the loop forming. A control method for a press system comprising control means for controlling the device,
The loop forming device has a loop detection means for detecting the presence or absence of the loop in a state where the clamping means clamps the terminal end of the coil material,
a clamping step of clamping the terminal end of the coil material by the clamping means;
a continuous operation step of continuously operating the feed device and the press device by the control means until the loop detection means detects the absence of the loop;
a detection step in which the loop detection means detects the absence of the loop;
a stopping step of stopping the press device by the control means;
a low-speed feeding step in which the feeding device feeds the coil material of the predetermined feeding length at a feeding speed lower than the feeding speed in the continuous operation step;
A method of controlling a press system, comprising: