JP6649133B2 - Roll feeder, press system, and hoop material conveying method - Google Patents

Description

  The present invention relates to a roll feeder, a press system, and a hoop material conveying method.

BACKGROUND ART Conventionally, as a system for producing a molded product by pressing a hoop material wound in a coil shape, a configuration including an uncoiler, a leveler feeder, a press machine, and the like has been disclosed.
The leveler feeder corrects the winding habit of the hoop material fed from the uncoiler and supplies the hoop material intermittently at a predetermined pitch to the press device (for example, see Patent Document 1).

  At the time of inter-process feed between the press working and the next press working, the hoop material is sent by a hoop guide etc. at a height that does not touch the lower mold, and the pass line is lowered during press working until it contacts the lower mold. Can be As described above, since the pass line moves downward during the press working, tension is generated in the hoop material when the hoop material is sandwiched by the leveler feeder, so that the press working may not be performed properly.

  For this reason, the conventional leveler feeder is provided with release means for keeping the feed roll and the plurality of work rolls away from the hoop material during press working. The leveler feeder has a cylinder device as release means, and is configured so that a plurality of upper rolls are separated from a plurality of lower rolls, so that the hoop material can be moved smoothly according to a height change during press working. I have.

Japanese Patent Publication No. 63-56004

However, in Patent Literature 1, since a plurality of upper rolls need to be separated from a plurality of lower rolls, a large power for moving a heavy object including a plurality of upper work rolls is required, and energy consumption is reduced. It was big.
In addition, since the release operation is performed at a high frequency of several tens of times per minute, the operation speed is increased because the time of one release operation is very short. As described above, since the operation speed is high and the weight of the object to be moved is large, there is a problem that vibration and sound are generated during operation.

  An object of the present invention is to provide a roll feeder, a press system, and a hoop material conveyance method capable of reducing energy consumption, vibration, and generation of sound in consideration of conventional problems.

  A roll feeder according to a first invention is a roll feeder that transports a hoop material to a press device, and includes a pair of first and second rolls, a motor, and a control unit. The pair of first rolls and second rolls are arranged so as to sandwich the hoop material and feed the hoop material in the transport direction. The motor drives at least one of the first roll and the second roll. The control unit controls driving of the motor. The control unit has a process drive instruction unit and a machining drive instruction unit. The process drive instructing unit drives the motor so as to send the hoop material to the press device side between the press working and the next press working. The processing-time drive instructing unit drives a motor so as to send the hoop material to the press device side during the pressing.

As described above, at least one of the first roll and the second roll is driven by the motor, and the hoop material is sent to the press device side during the press working by the press device. Accordingly, it is possible to suppress the generation of tension in the hoop material due to a change in the pass line due to the sinking of the hoop material during press working.
That is, by rotating at least one of the first and second rolls without separating the first or second roll from the hoop material, it is possible to suppress the generation of tension in the hoop material during press working.

Therefore, a release operation for separating the first roll or the second roll from the hoop material at the time of processing is not required, and only the first roll and the second roll need to be driven, so that energy consumption, vibration, and generation of sound are reduced. Can be reduced.
Further, since it is not necessary to physically move the first roll or the second roll so as to be separated from the hoop material, it is possible to respond to a recent demand for an increase in production speed.

The roll feeder according to a second invention is the roll feeder according to the first invention, wherein the processing-time driving instruction unit moves the hoop material to the press device side when the slide of the press device is lowered during press processing. The motor is driven so that the hoop material is pulled back from the press device by a predetermined amount when the slide is lifted during feeding by a predetermined amount and pressing.
In this way, by pulling back the predetermined amount of hoop material from the press device side when the slide is raised, the position of the hoop material can be returned to the original position when the height of the hoop material returns to the original position during press working. Can be.
Also, by returning the position of the hoop material to its original position, it is possible to prevent the occurrence of twisting resulting from the misalignment of the position of the pilot pin and the pin hole of the hoop material, which will be described later. Can be prevented.

  The roll feeder according to a third aspect of the present invention is the roll feeder according to the second aspect of the present invention, wherein the time of press working means that when a pilot pin formed on an upper die attached to a slide to a hoop material is inserted, a pilot Until the pin comes out of the hoop material. The machining drive instructor sends a predetermined amount of hoop material to the press device from the time the pilot pin is inserted into the hoop material until the slide reaches the bottom dead center, and the pilot pin The motor is driven so that a predetermined amount of the hoop material is pulled back from the press device by the time the material comes off.

In this way, by sending a predetermined amount of hoop material to the press device side from when the pilot pin is inserted until the slide reaches the bottom dead center, it is possible to suppress the generation of tension due to lowering.
Also, by pulling back a predetermined amount of the hoop material from the press device by the time the pilot pin comes out of the positioning hole from the bottom dead center, the pilot pin is caught on the hoop material, and the hoop material rises with the rise of the upper die. Can be prevented.

A roll feeder according to a fourth aspect of the present invention is the roll feeder according to the second or third aspect of the present invention, wherein the processing-time drive instructing unit determines the position of the slide and the hoop when feeding the hoop material to the press device by a predetermined amount. A processing pattern indicating the relationship between the feed amount of the material and the relationship between the slide position and the amount of retraction of the hoop material when the hoop material is pulled back from the press device side by a predetermined amount is stored. The processing-time drive instructing unit drives the motor so as to feed the hoop material to the pressing device side and pull it back from the pressing device side based on the processing time pattern.
As described above, since the relationship between the position at the time of slide lowering during the press working and the feed amount and the retraction amount of the hoop material is stored, the processing is performed based on the slide position information transmitted from the press device. The hour drive instruction unit can feed the hoop material to the press device side or pull it back from the press device side at an appropriate timing.

  A roll feeder according to a fifth aspect of the present invention is the roll feeder according to any one of the first to third aspects, further comprising a tension detecting unit that detects a tension of the hoop material. The working-time drive instructing unit controls the motor so that the tension detected by the tension detecting unit when sending the hoop material to the press device side during the press working approaches zero.

By detecting the tension generated in the hoop material due to the downward movement of the hoop material during press working, and driving the motor to reduce the tension to zero, the hoop material can be pressed at the appropriate timing during the vertical movement of the slide. Feeding to the device side can be performed.
When the hoop material is pulled back from the press device side, the hoop material is bent, so that no pushing force is generated and the tension does not become negative. Therefore, at the time of retraction, a predetermined constant weak tension may be used at a level at which no problem occurs. That is, when the hoop material is fed into the press device side, the tension is controlled to be zero, and when the hoop material is pulled back from the press device side, the tension is controlled to be weak. Good. Note that the weak tension includes zero.

A roll feeder according to a sixth invention is the roll feeder according to any one of the fifth inventions, wherein the tension detector has a torque sensor provided on at least one shaft of the first roll and the second roll. . The machining drive instructing unit controls the motor so that the torsional torque detected by the torque sensor during press working approaches zero.
Thus, by providing the torque sensor and measuring the torsional torque, it is possible to feed the hoop material to the press device side or pull it back from the press device side at an appropriate timing in the elevating operation of the slide.

A roll feeder according to a seventh aspect is the roll feeder according to any one of the first to sixth aspects, further comprising a plurality of first work rolls and a plurality of second work rolls. The plurality of first work rolls are arranged on the upstream side of the first roll in the transport direction. The plurality of second work rolls are arranged upstream of the second roll in the transport direction. The first work rolls and the second work rolls are alternately arranged along the transport direction.
By arranging the plurality of first work rolls and the plurality of second work rolls in this way, the curl of the hoop material can be corrected.

A roll feeder according to an eighth aspect is the roll feeder according to the seventh aspect, wherein the motor drives at least one of the plurality of first work rolls and the plurality of second work rolls.
Thereby, when the first work roll or the second work roll is provided, the first work roll or the second work roll is rotated and driven together with the first roll or the second roll during the press working to press the hoop material. It can be sent to the device side.

  A roll feeder according to a ninth aspect is the roll feeder according to the fourth aspect, and includes a separation unit, a measure roll, and a roll position detection unit. The separation unit separates the first roll from the second roll. The measure roll is arranged in contact with the hoop material and rotates with the movement of the hoop material. The roll position detector detects the position of the major roll. The control unit further includes a processing pattern generation unit. The processing pattern generation unit generates a processing pattern by associating the position of a slide during press working with the movement of the hoop material in a state where the first roll is separated from the second roll by the separating unit, and drives during processing. It is stored in the instruction unit.

With this, the relationship between the slide position and the movement amount of the hoop material at the time of press working in a state where at least one of the first roll and the second roll is separated from the hoop material is determined in advance by using the mold to be used. It is possible to generate a pattern at the time of processing.
For this reason, the hoop material can be sent to the press device side or pulled back from the press device side at an appropriate timing in the slide lifting operation.

A roll feeder according to a tenth aspect is the roll feeder according to the ninth aspect, further comprising a plurality of first work rolls and a plurality of second work rolls. The plurality of first work rolls are arranged on the upstream side of the first roll in the transport direction. The plurality of second work rolls are arranged upstream of the second roll in the transport direction. The first work rolls and the second work rolls are alternately arranged along the transport direction.
By arranging the plurality of first work rolls and the plurality of second work rolls in this way, the curl of the hoop material can be corrected.

A roll feeder according to an eleventh aspect is the roll feeder according to the tenth aspect,
The motor drives at least one of the plurality of first work rolls and the plurality of second work rolls. The separation unit separates the plurality of first work rolls from the plurality of second work rolls.

  Thereby, when the first work roll or the second work roll is provided, the position of the slide, at least one of the first roll and the second roll, the plurality of first work rolls and the plurality of second work rolls are determined in advance. A relationship with the movement amount of the hoop material at the time of press working in a state where at least one of the work rolls is separated from the hoop material is obtained, and a pattern at the time of working can be generated.

  A press system according to a twelfth aspect includes a press device and a roll feeder. The press device presses the hoop material. The roll feeder has a pair of first and second rolls, a motor, and a control unit. The pair of first rolls and second rolls are arranged so as to sandwich the hoop material and feed the hoop material in the transport direction. The motor drives at least one of the first roll and the second roll. The control unit controls driving of the motor. The control unit has a process drive instruction unit and a machining drive instruction unit. The process drive instructing unit drives the motor so as to send the hoop material to the press device side between the press working and the next press working. The processing-time drive instructing unit drives a motor so as to send the hoop material to the press device side during the pressing.

This eliminates the need for a release operation for separating the first roll or the second roll from the hoop material at the time of processing, and only requires driving at least one of the first roll and the second roll. Can be reduced.
In addition, since it is not necessary to physically move the first roll or the second roll in a direction to separate them, it is possible to respond to a recent demand for an increase in production speed.

  A hoop material conveying method according to a thirteenth invention is a hoop material conveying method for conveying a hoop material to a press device, and includes a process driving step and a machining driving step. In the process driving step, at least one of the pair of the first roll and the second roll is driven using a motor as a drive source, and the hoop material is sent to the press device side between the press working and the next press working. In the working drive step, the motor is driven so as to send the hoop material to the press device side during the press working.

This eliminates the need for a release operation for separating the first roll or the second roll from the hoop material at the time of processing, and only requires driving at least one of the first roll and the second roll. Can be reduced.
In addition, since it is not necessary to physically move the first roll or the second roll in a direction to separate them, it is possible to respond to a recent demand for an increase in production speed.

  According to the present invention, it is possible to provide a roll feeder, a press system, and a hoop material conveying method capable of reducing energy consumption, vibration, and generation of sound.

FIG. 1 is a schematic diagram illustrating a configuration of a press system according to an embodiment of the present invention. FIG. 2 is a perspective view showing a configuration of rolls of the leveler feeder of FIG. 1. FIG. 2 is a schematic front view showing a state in which a die is arranged at a top dead center in the press device of FIG. 1. FIG. 4 is a diagram illustrating a state in which FIG. 3 is viewed from a downstream side in a transport direction. FIG. 2 is a schematic front view showing a state where a die is arranged at a bottom dead center in the press device of FIG. 1. The figure which shows the slide motion in the press system of FIG. 2A is a diagram illustrating a state where an upper mold has reached a bottom dead center in the press system of FIG. 1, and FIG. 2B is a diagram illustrating a state where a pilot pin has come off a hoop material in the press system of FIG. FIG. 2 is a schematic diagram showing a state during a pattern generation operation during processing in the press press system of FIG. 1. FIG. 2 is a flowchart showing the operation of the press system in FIG. 1. FIG. 1A is a schematic front view showing a feed operation during machining in the drive system during machining in the press system of FIG. 1; FIG. 2B is a schematic front view showing a return operation during machining in the drive system during machining in the press system in FIG. (C) A schematic front view showing a step driving operation (step feeding operation) in the press system of FIG. The schematic diagram which shows the structure of the press system in the modification of embodiment of this invention. The schematic diagram which shows the structure of the press system in the modification of embodiment of this invention. The schematic diagram which shows the structure of the press system in the modification of embodiment of this invention.

A press system including a roll feeder according to an embodiment of the present invention will be described below with reference to the drawings.
<1. Configuration>
(1-1. Outline of Press System 1)
FIG. 1 is a schematic diagram illustrating a configuration of a press system 1 according to the present embodiment.

The press system 1 of the present embodiment is a system that presses the hoop material 6.
The press system 1 includes a leveler feeder 2, a press device 3, an uncoiler 4, and an operation unit 5, as shown in FIG. The hoop material 6 is wound in a coil shape and is mounted on the uncoiler 4.
The uncoiler 4 unwinds the hoop material 6 such as a coiled steel plate and sends it out to the leveler feeder 2.

The leveler feeder 2 corrects the curl of the hoop material 6 supplied from the uncoiler 4 via the carry-in port 2a. The hoop material 6 is supplied from the uncoiler 4 to the carry-in entrance 2 a of the leveler feeder 2.
A die 10 is attached to the press device 3, and the press device 3 presses the hoop material 6 sent from the leveler feeder 2.

The downstream side in the transport direction of the hoop material 6 is shown as X, and the upstream side is shown as Y.
The operation unit 5 receives an operation by a worker. Instructions are input to the feeder control unit 29 of the leveler feeder 2, the press control unit 39 of the press device 3, and the control unit (not shown) of the uncoiler 4 by an operator's input to the operation unit 5. Production etc. are performed.

(1-2. Press device)
The press device 3 is disposed downstream of the leveler feeder 2, and includes a bed 31, an upright 32, a bolster 33, a crown 34, a slide 35, a slide drive unit 36, a crank angle detector 38, And a press control unit 39.
The bed 31 forms a base of the press device 3. The bolster 33 is fixed on the bed 31. The uprights 32 are pillar-shaped members, and four are arranged on the bed 31.

The crown 34 is supported upward by four uprights 32. The slide 35 is suspended below the crown 34.
The slide drive unit 36 is provided on the crown 34 and moves the slide 35 up and down. The slide 35 moves up and down so as to use the upright 32 which is a pillar connecting the bed 31 and the crown 34 as a guide.

  The slide drive section 36 has a crank 361 and a connecting rod 362. The crank 361 is disposed on the crown 34 and is rotated by a drive mechanism (not shown). One end of a connecting rod 362 is connected by a pin at a position eccentric to the rotation center of the crank 361. The other end of the connecting rod 362 is connected to the slide 35 by a pin. With this configuration, the slide 35 moves up and down by rotating the crank 361. Further, by determining the rotation angle of the crank 361, the position of the slide 35 is uniquely determined.

The crank angle detector 38 is an encoder or the like, and detects the rotation angle of the crank 361.
The press control unit 39 controls a drive mechanism that drives the slide drive unit 36, moves the slide 35 up and down, and performs press working.

(1-3. Leveler feeder)
The leveler feeder 2 corrects the curl of the hoop material 6 and sends the hoop material 6 to the press device 3.
The leveler feeder 2 includes a plurality of upper work rolls 21, a plurality of lower work rolls 22, an upper feed roll 23, a lower feed roll 24, a servo motor 25, a servo motor encoder 26, a separation cylinder 27, It has a detection unit 28 and a feeder control unit 29.
Here, the leveler feeder 2 according to the present embodiment generally includes a process driving operation and a processing operation as an operation of driving a servomotor 25 (described later) in order to send the hoop material 6 to the press device 3 side during product production. Two kinds of operations of the time drive operation are performed.

The step driving operation (also referred to as a step feeding operation) means that after the press processing of the hoop material 6 is performed between the upper die 11 and the lower die 12, the press processing is performed by the upper die 11 and the lower die 12 in the next step. This is an operation of feeding the hoop material 6 for one process in order to perform it. In the step driving operation, the servomotor 25 is driven based on a step pattern 61a described later.
Further, the driving operation at the time of processing is performed in order to suppress the generation of tension in the hoop material 6 by moving the pass line downward with the downward movement of the mold 10 at the time of press processing. Although the driving operation at the time of working will be described in detail later, in progressive press working, when the hoop material 6 (also referred to as a work) is worked near the bottom dead center of the slide 35, the rolls (the lower work roll 22, the lower work roll 22, The operation of feeding the hoop material 6 by slightly rotating the feed roll 24 and the upper feed roll 23) and then pulling back the hoop material 6 is shown. For this reason, the processing-time driving operation includes a processing-time feeding operation for feeding the hoop material 6 to the press device 3 and a processing-time returning operation for pulling the hoop material 6 from the press device 3 side. In the machining driving operation, the servomotor 25 is driven based on a machining pattern 62a described later.

(Work roll)
FIG. 2 is a schematic perspective view showing rolls of the leveler feeder 2. In FIG. 2, the pressing device is indicated by a dotted line.
For example, four upper work rolls 21 are arranged in FIGS. 1 and 2, and three lower work rolls 22 are arranged below the upper work roll 21. The upper work rolls 21 and the lower work rolls 22 are alternately arranged along the transport direction, and correct the curl of the hoop material 6.

The plurality of lower work rolls 22 are mechanically connected by gears or the like (not shown). Power is transmitted from the servo motor 25 to any one of the lower work rolls 22 via a speed reducer, whereby the plurality of lower work rolls 22 rotate.
Note that the plurality of upper work rolls 21 rotate together with the transport of the hoop material 6.

(Feed roll)
The pair of upper feed rolls 23 and lower feed rolls 24 are arranged downstream of the upper work roll 21 and the lower work roll 22 in the X direction.
The hoop material 6 is sandwiched between the upper feed roll 23 and the lower feed roll 24. The lower feed roll 24 and the upper feed roll 23 are connected by a gear or the like (not shown). When power is transmitted from the servo motor 25 via the speed reducer and the lower feed roll 24 rotates, the upper feed roll 23 also rotates. Then, the hoop material 6 sandwiched between the upper feed roll 23 and the lower feed roll 24 is fed toward the press device 3.

(Servomotor)
The driving force of the servo motor 25 is transmitted to the lower feed roll 24 and one lower work roll 22, and the lower feed roll 24 and one lower work roll 22 rotate. The rotation of the lower feed roll 24 causes the upper feed roll 23 connected to the lower feed roll 24 by a gear or the like to rotate. In addition, the rotation of one lower work roll 22 causes a plurality of lower work rolls 22 to rotate. The servo motor encoder 26 detects a rotation angle (also referred to as a rotation position) and a rotation angular velocity of the servo motor 25.

(Separate cylinder)
When the hoop material 6 set in the uncoiler 4 is passed through the leveler feeder 2 before product production, the separation cylinder 27 shown in FIG. 22 and the lower feed roll 24 are separated upward.
The cylinder rod of the separation cylinder 27 is attached to the support portion 2 b that supports the upper feed roll 23 and the plurality of upper work rolls 21. The upward movement of the cylinder rod of the separation cylinder 27 causes the support portion 2b to rotate upward about the rotation shaft 2c (see arrow A).

(Movement detector)
The movement detection unit 28 detects the amount of rotation of the rolls during the driving operation during processing. The movement detecting section 28 has a major roll 51 and a major roll encoder 52. As shown in FIGS. 1 and 2, the measure roll 51 is pressed against the passed hoop material 6 and rotates with the movement of the hoop material 6. In addition, as shown in FIG. 2, the width of the measure roll 51 does not need to cover the entire width of the hoop material 6. The measure roll encoder 52 detects the rotation of the measure roll 51.

The measure roll 51 is used to generate a processing pattern 62a (to be described later) used during production before production.
Before the production of the product, the lower die 12 and the upper die 11 used for production are set in the press device 3, and after passing through the leveler feeder 2 before the production of the product, the upper feed roll 23 and the plurality of upper work rolls 21 are formed. Pressing is carried out in a state where is moved upward.

  During this press working, the hoop material 6 is drawn into the press device 3 with the downward movement of the pass line, but the measure roll 51 rotates with the movement of the hoop material 6. By detecting this rotation by the measure roll encoder 52, the amount of the hoop material 6 drawn into the press device 3 can be detected. The movement of the pass line downward and the drawing in will be described later.

(Feeder control unit)
The feeder control unit 29 mainly controls the servomotor 25 based on the crank angle obtained from the crank angle detector 38 at the time of producing a product based on an operator's instruction from the operation unit 5.
The feeder control unit 29 includes a processing pattern generation instruction unit 60, a process drive instruction unit 61, a processing drive instruction unit 62, a first switching unit 63, a position comparison unit 64, a position control unit 65, a speed The comparison unit 66, the speed control unit 67, the current comparison unit 68, the current control unit 69, the current detection unit 70, the position calculation unit 71, the speed calculation unit 72, the second switching unit 73, A pattern generation unit 74.

The process drive instructing section 61 stores a process pattern 61a that is a relationship between the crank angle and the position of the hoop material 6 at the time of the process drive operation (also referred to as a relationship between the amount of movement of the hoop material 6 for each crank angle). The process drive instructing section 61 receives the crank angle from the crank angle detector 38 and transmits a position command to the servomotor 25 based on the process pattern 61a.
The machining-time drive instructing unit 62 stores a machining-time pattern 62a that is a relationship between the crank angle and the position of the hoop material 6 during the machining-time driving operation (also referred to as a relationship between the movement amount of the hoop material 6 for each crank angle). ing. The machining drive instructing section 62 receives a crank angle from the crank angle detector 38 and transmits a position command to the servomotor 25 based on the machining pattern 62a.

The processing pattern generation instructing unit 60 gives an instruction to generate the processing pattern 62a.
The first switching unit 63 includes a position command for each crank angle from the process driving instruction unit 61, a position command for each crank angle from the machining drive instruction unit 62, and a crank angle from the machining pattern generation instruction unit 60. The information is selectively transmitted to the second switching unit 73. Specifically, the first switching unit 63 connects between a and b at the time of the process driving instruction, connects between c and b at the time of the machining driving instruction, and connects at the time of the machining pattern generation instruction. , D-b.

The second switching unit 73 connects between a and b at the time of a process driving instruction or a machining driving instruction, and outputs a position command for each crank angle from the process driving instruction unit 61 or a machining driving instruction unit 62. Is output to the position comparing section 64.
Also, the second switching unit 73 connects between a and c at the time of the processing pattern generation instruction, and uses the crank angle information (also referred to as slide position information) from the crank angle detector 38 as the processing pattern. It is transmitted to the generation unit 74.

The position calculating unit 71 calculates the position of the hoop material 6 (which can also be referred to as a movement amount (a feed amount or a return amount) of the hoop material 6) from the rotation of the measure roll encoder 52 at the time of the process drive instruction or the machining drive instruction. , And outputs the position signal to the position comparing section 64.
The position comparing section 64 compares the position signal from the position calculating section 71 with the position command from the process drive instructing section 61 or the machining drive instructing section 62, and outputs the difference to the position control section 65.

The position control unit 65 generates a speed signal based on the difference transmitted from the position comparison unit 64, and transmits the generated speed signal to the speed comparison unit 66.
The speed calculator 72 receives the rotational angular speed of the motor from the servo motor encoder 26, calculates the actual speed of the hoop member 6, and outputs a speed signal to the speed comparator 66.
The speed comparison unit 66 compares the speed signal generated by the position control unit 65 with the actual speed information input from the speed calculation unit 72, and transmits the difference to the speed control unit 67. The actual speed information obtained by differentiating the position information from the major roll encoder 52 without using the actual speed information from the servo motor encoder 26 via the speed calculating unit 72 as the speed information input to the speed comparing unit 66 is used. You may use as.

The speed control unit 67 creates a current signal based on the difference transmitted from the speed comparison unit 66 and transmits the current signal to the current comparison unit 68.
The current comparison unit 68 compares the current signal generated by the speed control unit 67 with information on the current value from the current detection unit 70 that detects the current of the servo motor 25, and transmits the difference to the current control unit 69. I do.

The current control unit 69 generates an appropriate supply current based on the difference, and supplies the generated supply current to the servomotor 25.
The processing-time pattern generation unit 74 receives the information on the crank angle (slide position information) received via the processing-time pattern generation instructing unit 60 and the hoop material 6 detected by the measure roll 51 during the processing-time pattern generation operation. A processing pattern 62a is generated by associating the drawing position with the drawing-in position, and stored in the processing drive instruction unit 62.
The process pattern 61a stored in the process drive instructing section 61 may be set and stored in advance for each die 10, or may be adjusted by performing a predetermined pattern adjustment at the time of try press. The pattern 61a may be created.

(1-4. Mold)
FIG. 3 is a schematic diagram around the mold 10 and the hoop 6 in a state where the slide 35 is arranged at the top dead center. FIG. 4 is a view of FIG. 3 as viewed from the downstream direction X side.

The mold 10 used for processing a product has a plurality of upper molds 11 and a plurality of lower molds 12. A plurality of hoop guides 13 are provided on the bolster 33.
The plurality of upper dies 11 are attached to the lower surface of the slide 35. The plurality of lower dies 12 are fixed on the bolster 33.
A plurality of upper dies 11 are arranged in the transport direction. Further, a plurality of lower dies 12 are arranged in the transport direction. One upper mold 11 and one lower mold 12 are arranged to face up and down. That is, a plurality of pairs of the upper mold 11 and the lower mold 12 are arranged in the transport direction.

The press system 1 of the present embodiment performs progressive press working, and a pair of an upper mold 11 and a lower mold 12 correspond to one process. Then, the hoop material 6 is sent one step at a time in the downstream direction X to manufacture a product.
The hoop guides 13 are arranged at both ends in the width direction of the hoop material 6, as shown in FIG. A groove 13a is formed inside the hoop guide 13, and the hoop material 6 is held in the vertical direction by fitting the end of the hoop material 6 into the groove 13a. The hoop guide 13 is supported by a spring element 14 from below. A holding pin 15 (see FIG. 3) is provided below the slide 35 so as to face the hoop guide 13 in the vertical direction. At the time of press working, the holding pin 15 presses the hoop guide 13 downward.

The upper die 11 is provided with a pilot pin 16, and the lower die 12 is formed with an insertion hole 17 into which the pilot pin 16 is inserted.
In the progressive production such as the press system 1 of the present embodiment, the hoop material 6 is pushed in from the upstream side Y to perform a process driving operation (also referred to as a process feeding operation). It is necessary to ensure that the position is reached, and the pilot pin 16 is generally used.

For example, a punch 18 for forming a positioning hole in the hoop material 6 is provided in the leftmost upper die 11 corresponding to the first step, and a positioning hole 6a is formed in the hoop material 6 in the first step.
A pilot pin 16 is provided at a position corresponding to the second upper die 11 from the left end corresponding to the second step. The pilot pin 16 is inserted into a positioning hole 6 a formed in the hoop material 6 by a punch 18, thereby positioning the hoop material 6 with respect to the mold 10. By providing the pilot pins 16 in the third and subsequent steps as described above, the mold 10 can be aligned with the position of the hoop material 6 in each step.
That is, the distance L between the punch 18 and the pilot pin 16 is the feed amount of the hoop material 6 for one process.

(1-5. Move down and pull in the pass line)
Next, the downward movement of the pass line and the drawing in of the hoop material will be described using the press system 1.

  FIG. 5 is a schematic diagram showing a state where the slide 35 has been lowered to the bottom dead center. In the progressive processing, not only cutting and punching but also forming such as bending and drawing is generally performed. Therefore, a change in the feeding height (pass line) of the hoop material 6 by the forming height is inevitable. At the top dead center of FIG. 3 (specifically, in a state where the slide 35 is arranged at a position high enough to prevent the upper mold 11 from contacting the hoop material 6), the pass line has a height from above the bolster 33. This is indicated by a. In FIG. 3, the height of the nip portion formed by the upper feed roll 23 and the lower feed roll 24 corresponding to the outlet of the hoop material 6 from the leveler feeder 2 is set to the same height a as the pass line so as to facilitate understanding. And

  When the slide 35 descends from the state of FIG. 3 to the bottom dead center, the hoop guide 13 is pushed by the holding pin 15 and the height of the pass line decreases from a to b. That is, the pass line at the bottom dead center is lower by a-b than the pass line until the upper die 11 touches the hoop material 6. On the other hand, since the height of the lower feed roll 24 is a and does not change, the hoop material 6 is slightly pulled in the downstream direction X while the slide 35 reaches the bottom dead center. When the roll 22, the upper feed roll 23, the lower feed roll 24, and the like are stopped, tension is generated in the hoop material 6.

In the leveler feeder 2 of the present embodiment, at the time of the retraction, the servo motor 25 is controlled to rotate the lower work roll 22, the upper feed roll 23, and the lower feed roll 24, thereby suppressing the generation of tension.
In the following description, the statement that the pilot pin 16 is inserted into or removed from the positioning hole 6a of the hoop material 6 also includes that the punch 18 is inserted or removed from the hoop material 6.

<2. Operation>
Next, the operation of the leveler feeder 2 of the present embodiment will be described, and an example of the hoop material conveying method of the present invention will be described at the same time.
(2-1. Process pattern, processing pattern)
First, the relationship between the process pattern 61a, the processing pattern 62a, and the slide motion will be described. FIG. 6 is a diagram showing a slide motion. In FIG. 6, the vertical axis indicates the slide position, and the horizontal axis indicates the crank angle.

In the slide motion shown in FIG. 6, a state is shown in which the slide 35 moves up and down according to the crank angle.
As described above, the step driving operation performed based on the step pattern 61a shown in FIG. 1 is performed by pressing the hoop material 6 between the upper die 11 and the lower die 12 and then performing the upper die of the next process. This is an operation of feeding the hoop material 6 for one process in order to perform press working with the lower mold 11 and the lower mold 12. This step driving operation (step feed operation) may be started after the pilot pin 16 comes out of the hoop material 6 while the slide 35 rises beyond the bottom dead center. In this case, the operation must be completed before the pilot pin 16 is inserted into the positioning hole 6a of the hoop material 6.

  In the machining driving operation performed based on the machining pattern 62a shown in FIG. 1, the machining feed operation is performed by inserting the pilot pin 16 into the positioning hole 6a of the hoop material 6 in order to prevent generation of tension. It is necessary to perform the operation from the moment of touch to the bottom dead center (θ2). In the returning operation during machining, it is necessary to pull back the hoop material 6 from the bottom dead center until the pilot pin 16 comes out of the positioning hole 6a of the hoop material 6.

  Therefore, this switching timing is based on the slide height at which the pilot pin 16 is inserted and removed from the positioning hole 6a. This height is h1 in FIGS. 7A and 7B when determined at the slide position with reference to the bottom dead center. FIG. 7A is a diagram illustrating a state in which the upper mold has reached the bottom dead center, and FIG. 7B is a diagram illustrating a state in which the pilot pin 16 has come out of the positioning hole 6 a of the hoop material 6. is there. Since h1 is determined for each product and mold, it is made to correspond to the crank angle as shown in FIG. 6 together with the slide motion. The crank angles when the slide height becomes h1 are indicated by θ1, θ3, and θ4. θ1 indicates the time when the slide 35 comes down and the pilot pin 16 is inserted into the positioning hole 6a of the hoop material 6. θ3 indicates the time when the slide 35 rises and the pilot pin 16 comes out of the positioning hole 6a of the hoop material 6. θ4 indicates the time when the pilot pin 16 is inserted into the hoop member 6 in the next cycle after θ3. θ2 indicates the crank angle at the bottom dead center.

  The position command is transmitted from the process drive instructing unit 61 and the first switching unit 63 is set to the ab connection in the block diagram of FIG. 1 when the crank angle is from θ3 to θ4. The position command is transmitted from the machining drive instruction unit 62 and the first switching unit 63 is set to the cb connection from θ1 to θ3.

(2-2. Pattern generation operation during processing)
When production of a product is started using a new mold 10 or hoop material 6, a processing pattern generation operation is performed before the production of the product is started. The processing pattern generation operation generates the processing pattern 62a. Operation.
First, the hoop material 6 wound in a coil shape is set on the uncoiler 4. Further, a mold 10 used for production is attached to the press device 3.
In the leveler feeder 2, the upper feed roll 23 and the plurality of upper work rolls 21 are separated from the lower feed roll 24 and the plurality of lower work rolls 22 by the contraction of the separation cylinder 27.

In this manner, in the separated state, the hoop material 6 is passed through the leveler feeder 2 via the carry-in port 2a.
In such a state, an operation of detecting the relationship between the crank angle and the position of the hoop material 6 at the time of the machining drive operation is performed by input of a machining pattern generation instruction to the operation unit 5 by the operator.

Specifically, as shown in FIG. 8, in a state where the upper feed roll 23 and the upper work roll 21 are separated upward from the hoop material 6, the press control unit 39 controls the drive mechanism, and the slide 35 moves downward. A pressing operation is performed between the upper mold 11 and the lower mold 12.
By this pressing operation, the height of the pass line is reduced from a to b, and the hoop material 6 is drawn. The amount of movement of the hoop material 6 that is drawn is detected by the measure roll 51. As described above, the crank angle information (also referred to as slide position information) from the crank angle detector 38 is input to the machining pattern generation instructing unit 60 and output to the first switching unit 63.

The first switching unit 63 connects between d and b, and the second switching unit 73 connects between a and c. Then, the information on the crank angle is output to the processing pattern generation unit 74.
On the other hand, the movement amount of the hoop material 6 due to the pull-in detected by the measure roll 51 is also output to the processing pattern generation unit 74.
Then, the processing pattern generating unit 74 calculates the moving amount for each crank angle by associating the crank angle information (slide position information) with the moving amount of the hoop material 6, and generates the processing pattern 62a. It is stored in the processing-time driving instruction unit 62.

(2-3. Press operation)
Next, a press operation at the time of product production will be described.
After the above-described machining drive pattern is generated, the separation cylinder 27 is extended by an input to the operation unit 5 or the like, and the upper work rolls 21 and the upper feed rolls 23 come into contact with the hoop material 6.

FIG. 9 is a flowchart showing the operation of the leveler feeder 2 of the present embodiment.
If it is assumed that the hoop material 6 is passed between the upper die 11 and the lower die 12 of the first process, the feed is not performed. Wait for detection of θ1. That is, the feeder control unit 29 receives a crank angle signal from the crank angle detector 38 and detects that the crank angle has reached θ1 (see FIG. 6).

  Next, in step S <b> 12, the processing-time driving instruction unit 62 of the feeder control unit 29 issues a processing-time feeding instruction. The feeder control unit 29 controls the servomotor 25 based on the processing pattern 62a (see FIG. 1), and moves the hoop material 6 toward the press device 3 as the slide 35 descends as shown in FIG. Send in. Here, the feed of the hoop material 6 in the feed operation during processing is performed from when the pilot pin 16 is inserted into the positioning hole 6a of the hoop material 6 (θ1) to the bottom dead center (θ2).

The processing-time drive instructing unit 62 of the feeder control unit 29 stops the processing-time feeding in step S13 when the specified amount of the hoop material 6 is fed based on the processing-time pattern 62a.
At this time, the crank angle has reached the crank angle θ2 (see FIG. 6), which is the bottom dead center.
As shown in FIG. 10B, the returning operation at the time of machining is based on the pattern 62a at the time of machining from the bottom dead center (θ2) to when the pilot pin 16 comes out of the positioning hole 6a of the hoop material 6 (θ3). This is an operation of pulling back the amount of hoop material 6 sent by the feeding operation during processing.

In step S14, the processing-time driving instruction unit 62 of the feeder control unit 29 starts the operation of pulling back the hoop material 6 by the amount sent in the processing-time feeding operation. When the machining drive instructing unit 62 of the feeder control unit 29 pulls back the hoop material 6 that has been fed during the machining feed based on the machining pattern 62a, the machining return operation is stopped in step S15.
At this time, the crank angle has reached the crank angle θ3 (see FIG. 8).

Next, in step S16, the process drive instructing section 61 pushes the hoop material 6 for one process in the downstream direction X based on the process pattern 61a. This step feed operation starts when the pilot pin 16 comes off the hoop material 6 (θ3), and ends by the time the pilot pin 16 is inserted into the hoop material 6 (θ4) in the process of lowering the slide 35.
As shown in FIG. 10C, when the hoop material 6 has been sent for one process based on the process pattern 61a, the process drive instructing unit 61 completes the process feed in step S17 and stops the process feed operation in step S18. I do.

In step S19, the feeder control unit 29 determines whether the planned number of process feeds has been completed. If the planned number of process feeds has not been completed, the control proceeds to step S11. Since the slide 35 has been lowered again, when the predetermined crank angle θ4 is reached in step S11, the feed operation during processing is performed again in step S12. Thus, steps S11 to S19 are repeated.
Then, in step S19, when the feeder control unit 29 ends the planned number of process feeds and determines that the planned number of productions has ended, the control is stopped.

<3. Features>
(3-1)
The leveler feeder 2 (an example of a roll feeder) of the present embodiment is a roll feeder that conveys the hoop material 6 to the press device 3, and includes a pair of an upper feed roll 23 (an example of a first roll) and a lower feed roll 24. (Example of a second roll), a servomotor 25 (an example of a motor), and a feeder control unit 29 (an example of a control unit). The pair of upper feed rolls 23 and lower feed rolls 24 are arranged so as to sandwich the hoop 6 and feed the hoop 6 in the transport direction. The servo motor 25 drives at least one of the upper feed roll 23 and the lower feed roll 24. The feeder control unit 29 controls driving of the servo motor 25. The feeder control unit 29 includes a process drive instruction unit 61 and a machining drive instruction unit 62. The process drive instructing section 61 drives the servomotor 25 so as to send the hoop material 6 to the press device 3 between the press working and the next press working. The processing-time drive instructing unit 62 drives the servomotor 25 so as to send the hoop material 6 to the press device 3 at the time of press processing.

Note that the term "at the time of the press working" indicates that the crank angle shown in FIG. 6 is from θ1 to θ3.
As described above, at least one of the upper feed roll 23 and the lower feed roll 24 is driven by the servo motor 25, and the hoop material 6 is sent to the press device 3 during the press working by the press device 3. Accordingly, it is possible to suppress the generation of tension in the hoop material 6 due to a change in the pass line accompanying the sinking of the hoop material 6 during the press working.

That is, by rotating at least one of the upper feed roll 23 and the lower feed roll 24 without separating the same from the hoop material 6, it is possible to suppress the generation of tension in the hoop material 6 during press working.
Therefore, there is no need to perform a release operation for separating the upper feed roll 23 or the lower feed roll 24 from the hoop material at the time of processing, and it is only necessary to drive at least one of the upper feed roll 23 and the lower feed roll 24. In addition, generation of vibration and sound can be reduced.
Further, since it is not necessary to physically move the upper feed roll 23 or the lower feed roll 24 away from the hoop material 6, it is possible to respond to a recent demand for an increase in production speed.

(3-2)
In the leveler feeder 2 (an example of a roll feeder) of the present embodiment, the working drive instructing unit 62 places the hoop material 6 on the press device 3 side when the slide 35 of the press device 3 is lowered during the press working. The servo motor 25 is driven so that the hoop material 6 is pulled back from the press device 3 by a predetermined amount when the slide 35 is lifted during the constant feed and press working.

In this way, by pulling back the hoop material 6 by a predetermined amount from the press device 3 when the slide 35 is raised, when the height of the hoop material 6 returns to the original position during the press working, the hoop material 6 The position can also be restored.
Further, by returning the position of the hoop member 6 to its original position, it is possible to prevent the occurrence of twisting that occurs as a result of the position of the pilot pin 16 and the positioning hole 6a of the hoop member 6 being inconsistent. 11 can be prevented from rising.
Note that the predetermined amount is a minute value such as 5 mm.

(3-3)
In the leveler feeder 2 (an example of a roll feeder) of the present embodiment, the time of pressing is from when the pilot pin 16 formed on the upper die 11 attached to the slide 35 is inserted into the hoop material 6 (θ1). This is until the pilot pin 16 comes off the hoop material 6 (θ3). The processing-time drive instructing unit 62 applies a predetermined amount of the hoop material 6 to the press device 3 from when the pilot pin 16 is inserted into the hoop material 6 (θ1) until the slide 35 reaches the bottom dead center (θ2). The servo motor 25 is driven so that a predetermined amount of the hoop material 6 is pulled back from the press device 3 by the time the pilot pin 16 comes out of the hoop material 6 (θ3) from the bottom dead center (θ2).

In this way, by sending a predetermined amount of the hoop material 6 to the press device 3 from the time when the pilot pin 16 is inserted to the time when the slide 35 reaches the bottom dead center, it is possible to suppress the generation of tension due to the descent.
Further, by pulling back a predetermined amount of the hoop material 6 from the press device 3 by the time the pilot pin 16 comes out of the hoop material 6 from the bottom dead center, the pilot pin 16 is caught on the hoop material 6 and the upper die 11 The hoop material 6 can be prevented from rising with the rise.

(3-4)
In the leveler feeder 2 (an example of a roll feeder) of the present embodiment, the machining drive instructing unit 62 determines the position of the slide 35 and the feed amount of the hoop material 6 when the hoop material 6 is fed to the press device 3 by a predetermined amount. A processing pattern 62a indicating the relationship and the relationship between the position of the slide 35 and the amount of pulling back of the hoop material 6 when the hoop material 6 is pulled back from the press device 3 side by a predetermined amount is stored. The processing-time drive instructing unit 62 drives the servomotor 25 based on the processing-time pattern 62a so as to feed the hoop material 6 to the press device 3 and pull it back from the press device 3 side.

  Thus, the relationship between the position of the slide 35 when the hoop material 6 is fed to the press device 3 by a predetermined amount and the feed amount of the hoop material 6 and the slide 35 when the hoop material 6 is pulled back from the press device 3 by a predetermined amount. Since the relationship between the position and the amount of pull-back of the hoop material 6 is stored, the machining-time drive instruction unit 62 determines the hoop at an appropriate timing based on the crank angle (position information of the slide 35) transmitted from the press device 3. The material 6 can be sent to the press device 3 side or pulled back from the press device 3 side.

(3-5)
The leveler feeder 2 (an example of a roll feeder) of the present embodiment further includes a plurality of upper work rolls 21 (an example of a first work roll) and a plurality of lower work rolls 22 (an example of a second work roll). Prepare. The plurality of upper work rolls 21 are arranged on the upstream side of the upper feed roll 23 in the transport direction. The plurality of lower work rolls 22 are arranged on the upstream side of the lower feed roll 24 in the transport direction. The upper work rolls 21 and the lower work rolls 22 are alternately arranged along the transport direction.
By arranging the plurality of upper work rolls 21 and the plurality of lower work rolls 22 in this manner, the curl of the hoop material 6 can be corrected.

(3-6)
In the leveler feeder 2 (an example of a roll feeder) of the present embodiment, the servo motor 25 drives at least one of the plurality of upper work rolls 21 and the plurality of lower work rolls 22.
Thereby, when the upper work roll 21 and the lower work roll 22 are provided, the upper work roll 21 or the lower work roll 22 is driven to rotate together with the upper feed roll 23 or the lower feed roll 24 at the time of press working, and the hoop material is formed. 6 can be sent to the press device 3 side.

(3-7)
The leveler feeder 2 (an example of a roll feeder) of the present embodiment includes a separation cylinder 27 (an example of a separation section), a measure roll 51, and a measure roll encoder 52 (an example of a roll position detection unit). The separation cylinder 27 separates the upper feed roll 23 from the lower feed roll 24. The measure roll 51 is arranged so as to be in contact with the hoop material 6 and rotates with the movement of the hoop material 6. The measure roll encoder 52 detects the position of the measure roll 51. The feeder control unit 29 further includes a processing pattern generation unit 74. The processing pattern generation unit 74 associates the position of the slide 35 and the movement of the hoop material 6 at the time of press working in a state where the upper feed roll 23 is separated from the lower feed roll 24 by the separation cylinder 27, and processes the processing pattern 62a. Is generated and stored in the machining-time driving instruction unit 62.

Thereby, using the mold 10 to be used, the position of the slide 35 and the movement of the hoop material 6 at the time of press working in a state in which the upper feed roll 23 is separated from the lower feed roll 24 are previously related to the processing. The pattern 62a can be generated.
Therefore, the hoop material 6 can be sent to the press device 3 side or pulled back from the press device 3 side at an appropriate timing in the elevating operation of the slide 35.

(3-8)
The leveler feeder 2 (an example of a roll feeder) of the present embodiment further includes a plurality of upper work rolls 21 (an example of a first work roll) and a plurality of lower work rolls 22 (an example of a second work roll). Prepare. The plurality of upper work rolls 21 are arranged on the upstream side of the upper feed roll 23 in the transport direction. The plurality of lower work rolls 22 are arranged on the upstream side of the lower feed roll 24 in the transport direction. The upper work rolls 21 and the lower work rolls 22 are alternately arranged along the transport direction. The servo motor 25 drives at least one of the plurality of upper work rolls 21 and the plurality of lower work rolls 22. The separation cylinder 27 separates the plurality of upper work rolls 21 from the plurality of lower work rolls 22.
Thus, when a plurality of upper work rolls 21 and a plurality of lower work rolls 22 are provided, the position of the slide 35 and the plurality of upper work rolls 21 and the upper feed rolls 23 are previously set to the plurality of lower work rolls. The relationship between the hoop material and the position of the hoop material at the time of press working in a state of being separated from the lower feed roll 24 can be obtained.

(3-9)
The press system 1 according to the present embodiment includes a press device 3 and a leveler feeder 2 (an example of a roll feeder). The press device 3 presses the hoop material 6. The leveler feeder 2 includes a pair of an upper feed roll 23 (an example of a first roll) and a lower feed roll 24 (an example of a second roll), a servomotor 25, and a feeder controller 29 (an example of a controller). Have. The feeder control unit 29 controls driving of the servo motor 25. The feeder control unit 29 includes a process drive instruction unit 61 and a machining drive instruction unit 62. The process drive instructing section 61 drives the servomotor 25 so as to send the hoop material 6 to the press device 3 between the press working and the next press working. The processing-time drive instructing unit 62 drives the servomotor 25 so as to send the hoop material 6 to the press device 3 at the time of press processing.

This eliminates the need for a release operation for separating the upper feed roll 23 or the lower feed roll 24 from the hoop material 6 during processing, and only requires driving the first roll and the second roll, thereby contributing to energy consumption, vibration, and sound. Can be reduced.
Further, since there is no need to physically move the upper feed roll 23 or the lower feed roll 24 in a direction away from the hoop material, it is possible to respond to a recent demand for an increase in production speed.

(3-10)
The hoop material transporting method of the present embodiment is a hoop material transporting method for transporting the hoop material 6 to the press device 3, and includes Step S16 (an example of a process driving step) and Step S12 (an example of a processing driving step). And. In step S16 (an example of a process driving step), at least one of the pair of upper feed rolls 23 and lower feed rolls 24 is driven using the servo motor 25 as a drive source, and the hoop material 6 is pressed between the press working and the next press working. To the press device 3 side. In step S12 (a driving step during processing), the servomotor 25 is driven so as to send the hoop material 6 to the press device 3 during the pressing.

This eliminates the need for a release operation for separating the upper feed roll 23 or the lower feed roll 24 from the hoop material 6 during processing, and only requires driving the first roll and the second roll, thereby contributing to energy consumption, vibration, and sound. Can be reduced.
Further, since there is no need to physically move the upper feed roll 23 or the lower feed roll 24 in a direction away from the hoop material, it is possible to respond to a recent demand for an increase in production speed.

<4. Other Embodiments>
As described above, one embodiment of the present invention has been described, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention.
(A)
In the above-described embodiment, the processing-time driving operation (processing-time feeding operation and processing-time returning operation) is performed after the processing-time pattern 62a is obtained by the movement detection unit 28 in advance. The position command may be issued every moment based on feedback information from the tension generated in the material 6. That is, the hoop material 6 is drawn into the mold 10 at the time of processing. If the tension increases at that time, the servo motor 25 is controlled so that the tension approaches zero.

FIG. 11 is a diagram illustrating a configuration of a press system 100 including a roll feeder 102 in which a twist sensor 80 is provided on a shaft of the lower feed roll 24 as an example of a tension detecting unit of the hoop material 6.
As shown in FIG. 11, the feeder control unit 129 of the roll feeder 102 is different from the feeder control unit 29 shown in FIG. 1 in that the processing pattern generation instruction unit 60, the second switching unit 73, and the processing pattern generation unit 74 are provided. Is not provided. Further, the roll feeder 102 is provided with a machining drive instruction unit 162 that outputs a position command based on the output of the torsion sensor 80. Further, the first switching unit 163 does not have d as compared with the first switching unit 63 of FIG. 1, and can perform ab connection and bc connection.

  When the crank angle reaches θ1, the machining drive instruction unit 162 of the feeder control unit 129 controls the servo motor 25 so that the torsion torque detected by the torsion sensor 80 becomes zero until the crank angle reaches the bottom dead center θ2. Do. Note that when performing the driving operation at the time of processing, the process driving operation is not performed, and the rolls (the upper feed roll 23, the lower feed roll 24, the plurality of upper work rolls 21, In addition, since no torque is generated in the plurality of lower work rolls 22), a control method for feeding back such torque can be used.

Thus, by providing the torsion sensor 80 as a torque sensor and measuring the torsion torque, the hoop material 6 can be fed into the press device 3 at an appropriate timing in the elevating operation of the slide 35.
When the hoop material 6 is pulled back from the press device 3 side, since the hoop material 6 is bent, no pushing force is generated and the tension does not become minus. Therefore, at the time of retraction, a predetermined constant weak tension may be used at a level at which no problem occurs. That is, when the hoop material 6 is fed to the press device side, the tension is controlled to be zero, and when the hoop material 6 is pulled back from the press device 3 side, the tension is controlled to be weak. May be. Note that the weak tension includes zero.
Note that the tension detecting unit generated in the hoop member 6 is not limited to a torque sensor such as the torsion sensor 80.

(B)
In the above embodiment, the processing pattern 62a is calculated by the movement detection unit 28, but the movement detection unit 28 is not provided, and the position of the hoop material 6 (the amount of pull-in) for each crank angle is calculated. It may be calculated. In this case, as shown in the roll feeder 202 of the press system 200 shown in FIG. 12, the feeder control unit 229 is provided with a processing pattern generation instruction unit 60, a second switching unit 73, and a processing pattern generation unit 74. Instead, a calculation unit 81 is provided. Further, the first switching unit 163 does not have d as compared with the first switching unit 63 of FIG. 1 and can perform ab connection and bc connection. The calculator 81 calculates the vertical and horizontal distances between the upper feed roll 23 and the lower feed roll 24, which are the outlets of the leveler feeder 2, and the inlet of the die 10, and the upper die 11 is a hoop material. From the movement of the slide 35 after the contact with 6 (the relationship between the crank angle and the position), the amount of pull-in for each crank angle can be calculated. The calculation result is stored in the processing-time drive instructing unit 62 as the processing-time pattern 62a.

(C)
In the above embodiment, the measure roll 51 is kept in contact with the hoop material 6 during the production of the product by the press operation. However, the measure roll 51 may be separated from the hoop material 6 by a separation mechanism (not shown).
FIG. 13 is a diagram illustrating a configuration of a press system 300 including such a leveler feeder 2. In the feeder control unit 329 of the press system 300 shown in FIG. 13, information from the measure roll encoder 52 is input to the position comparison unit 64 via the position calculation unit 71, as compared with the feeder control unit 29 shown in FIG. Instead, information from the servo motor encoder 26 is input via the position calculation unit 71. The position calculation unit 71 receives the rotation angle of the motor from the servo motor encoder 26, calculates the position of the hoop material 6 (also referred to as the movement amount (feed amount or return amount) of the hoop material 6), and compares the position signals with the position. Output to the unit 64.

The position comparing section 64 compares a position command input from the process drive instructing section 61 or the machining drive instructing section 62 via the first switching section 63 and the second switching section 73 with a position signal from the position calculating section 71. The difference is output to the position control unit 65.
As described above, the position comparison unit 64 of the feeder control unit 329 performs the position comparison using the measure roll 51.

(D)
In the above embodiment, when the machining pattern 62a is generated, the movement amount of the hoop material 6 for each crank angle at the time of press working is detected by the major roll 51 of the movement detecting unit 28. The movement amount may be detected by using.
However, when the movement amount is detected by the servo motor encoder 26 (semi-closed), feedback is applied by the measure roll 51 (fully closed) in order to remove the influence of the slip between the lower feed roll 24 and the hoop material 6. ) Is desirable. This is because the lower feed roll 24 and the upper feed roll 23 may be given a large angular velocity in order to cope with large acceleration / deceleration.

(E)
In the above-described embodiment, the hoop material 6 is pulled back in the returning operation during processing by the amount of the hoop material 6 sent in the feeding operation during processing. However, the hoop material 6 need not be pulled back. In this case, at the time of the next step feeding operation, a smaller amount of the hoop material 6 may be sent by the amount sent by the hoop material 6 in the feeding operation during processing.

(F)
In the above embodiment, the upper feed roll 23, the lower feed roll 24, and the plurality of lower work rolls 22 are rotationally driven using one servo motor 25. However, the servos for the upper feed roll 23 and the lower feed roll 24 are used. Two motors and a plurality of lower work roll servomotors may be provided.

(G)
In the above-described embodiment, the leveler feeder 2 has been described as an example of the roll feeder. However, a feeder device that does not have a leveler function for correcting the curl of the hoop material 6 and only feeds the hoop material 6 may be used. Good. That is, the plurality of upper work rolls 21 and the plurality of lower work rolls 22 need not be provided.

(H)
In the above embodiment, the feeder control unit 29 and the press control unit 39 are described separately, but a single control device may be used.
(I)
In the above embodiment, the servo motor 25 is used as an example of the motor. However, the present invention is not limited to the servo motor, and an electric motor, a stepping motor, or a hydraulic motor may be used.

  ADVANTAGE OF THE INVENTION According to the roll feeder and the hoop material conveyance method of this invention, it has an effect which can reduce generation | occurence | production of energy consumption, a vibration, and a sound, and is useful as a press system etc. of a progressive feed, for example.

1: press system 2: leveler feeder 2a: carry-in port 2b: support portion 2c: rotating shaft 3: press device 4: uncoiler 5: operation portion 6: hoop material 6a: positioning hole 10: die 11: upper die 12: lower Mold 13: Hoop guide 13a: Groove 14: Spring element 15: Holding pin 16: Pilot pin 17: Insertion hole 18: Punch 21: Upper work roll 22: Lower work roll 23: Upper feed roll 24: Lower feed roll 25: Servo Motor 26: Servo motor encoder 27: Separating cylinder 28: Movement detection unit 29: Feeder control unit 31: Bed 32: Upright 33: Bolster 34: Crown 35: Slide 36: Slide drive unit 38: Crank angle detector 39: Press control Unit 51: Measure roll 52: Measure roll encoder 60: Processing pattern generation instructing unit 61: process drive instructing unit 61a: process pattern 62: processing drive instructing unit 62a: processing pattern 63: first switching unit 64: position comparing unit 65: position control unit 66: speed comparing unit 67 : Speed control unit 68: current comparison unit 69: current control unit 70: current detection unit 71: position calculation unit 72: speed calculation unit 73: second switching unit 74: pattern generation unit at the time of machining 80: sensor 81: calculation unit 100 : Press system 102: Roll feeder 129: Feeder control unit 162: Driving instructing unit 163: First switching unit 200: Press system 202: Roll feeder 229: Feeder control unit 300: Press system 329: Feeder control unit 361: Crank 362: Connecting rod

Claims (13)

A roll feeder for conveying a hoop material to a press device,
A pair of a first roll and a second roll arranged to sandwich the hoop material and to send the hoop material in a transport direction;
A motor for driving at least one of the first roll and the second roll;
A control unit that controls the driving of the motor,
The control unit includes:
A step drive instructing unit that drives the motor so as to send the hoop material to the press device side during a press process and a next press process,
A working drive instruction unit that drives the motor to send the hoop material to the press device side during the press working,
Roll feeder. The machining drive instruction unit,
When the slide of the press device is lowered during the press working, the hoop material is fed to the press device side by a predetermined amount,
When the slide is raised during the press working, the motor is driven to pull the hoop material back by the predetermined amount from the press device side,
The roll feeder according to claim 1. The time of the press working is from when the pilot pin formed on the upper die attached to the slide is inserted into the hoop material to when the pilot pin comes off from the hoop material,
The machining drive instruction unit,
From the time when the pilot pin is inserted into the hoop material, until the slide reaches the bottom dead center, the predetermined amount of the hoop material is sent to the press device side,
From the bottom dead center, by the time the pilot pin comes out of the hoop material, drives the motor to pull back the predetermined amount of the hoop material from the press device side,
The roll feeder according to claim 2. The machining drive instruction unit,
The relationship between the position of the slide and the feed amount of the hoop material when the hoop material is sent to the press device side by the predetermined amount, and the slide of the slide when the hoop material is pulled back from the press device side by the predetermined amount. A processing pattern indicating the relationship between the position and the amount of pullback of the hoop material is stored,
Based on the pattern at the time of processing, the motor is driven so that the hoop material is sent to the press device side and pulled back from the press device side,
The roll feeder according to claim 2. Further comprising a tension detector for detecting the tension of the hoop material,
The machining drive instruction unit,
When sending the hoop material to the press device side during the press working, the motor is controlled so that the tension detected by the tension detection unit approaches zero.
The roll feeder according to claim 1. The tension detector has a torque sensor provided on at least one axis of the first roll and the second roll,
The machining drive instruction unit,
Controlling the motor so that the torsional torque detected by the torque sensor during the press working approaches zero.
The roll feeder according to claim 5. A plurality of first work rolls arranged upstream of the first roll in the transport direction;
A plurality of second work rolls arranged on the upstream side of the second roll in the transport direction.
The first work rolls and the second work rolls are alternately arranged along the transport direction.
The roll feeder according to claim 1. The motor drives at least one of the plurality of first work rolls and the plurality of second work rolls,
The roll feeder according to claim 7. A separating unit that separates the first roll from the second roll;
A measure roll arranged so as to be in contact with the hoop material and rotating with the movement of the hoop material,
A roll position detection unit that detects the position of the measure roll,
The control unit includes:
The processing pattern is generated by associating the position of the slide and the movement of the hoop material during the press working in a state where the first roll is separated from the second roll by the separating unit, A processing-time pattern generation unit to be stored in the drive instruction unit;
Having,
The roll feeder according to claim 4. A plurality of first work rolls arranged upstream of the first roll in the transport direction;
A plurality of second work rolls arranged on the upstream side of the second roll in the transport direction.
The first work rolls and the second work rolls are alternately arranged along the transport direction.
The roll feeder according to claim 9. The motor drives at least one of the plurality of first work rolls and the plurality of second work rolls,
The separation unit separates the plurality of first work rolls from the plurality of second work rolls,
The roll feeder according to claim 10. A press device for pressing a hoop material,
And a roll feeder for conveying the hoop material to a press device,
The roll feeder includes:
A pair of a first roll and a second roll arranged to sandwich the hoop material and to send the hoop material in a transport direction;
A motor for driving at least one of the first roll and the second roll;
A control unit for controlling the driving of the motor,
The control unit includes:
A step drive instructing unit that drives the motor so as to send the hoop material to the press device side during the pressing and the next pressing,
A working drive instruction unit that drives the motor to send the hoop material to the press device side during the press working,
Press system. A hoop material transfer method for transferring a hoop material to a press device,
A step of driving at least one of the pair of the first roll and the second roll by driving a motor as a driving source, and sending the hoop material to the press device side during press working and during the next press working;
A working drive step of driving the motor to send the hoop material to the press device side during the press working,
Hoop material transfer method.

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