JP6138723B2 - Synchronization / tuning system, synchronization / tuning method, and synchronization / tuning program for multiple presses - Google Patents

Description

  The present invention relates to a multiple-type press device in which a plurality of press devices are connected side by side in order to cope with processing of a long workpiece, and more specifically, synchronization and tuning of a pressurizing torque and the like between the press devices is achieved. The present invention relates to a system, a method, and a program.

  In general, in a press apparatus for bending a steel plate or the like into a required shape as a work, the length of the work that can be bent is determined by the distance between the side frames on both sides of the press apparatus. Conventionally, the maximum length of a workpiece that can be bent by this single pressing device has been limited to about 6 meters.

  The reason is that it is possible to manufacture a press device that can bend a workpiece of 6 meters or more, but rarely requires a workpiece that requires bending of 6 meters or more. This is because, even if a press device that can be used is made into a product by investing a large amount of development cost, it is not profitable in terms of cost due to the relationship between demand and sharing.

  Therefore, conventionally, when bending a long object of 6 meters or more, the operations of bending twice and bending three times were repeated using a single-size press machine. However, there has been a problem that the operation of repeating the second bending and the third bending operations using a single press machine is troublesome and the work efficiency is very poor.

  Conventionally, in order to solve such a problem, as shown in Patent Document 1, a plurality of single-size press machines are connected side by side in a horizontal direction such as two, three, etc. 2. Description of the Related Art An apparatus is known in which a workpiece is set across a plurality of press machines and a long workpiece is bent by a single operation.

  However, the “hydraulic press” disclosed in Patent Document 1 has a problem that high-precision bending cannot be performed for the following reasons.

  1) Poor response due to hydraulic control.

  2) Because of hydraulic control, it is impossible to synchronize and synchronize the ram up and down with high precision between the press devices connected side by side.

  3) A long workpiece has a subtle difference in thickness in the longitudinal direction, and due to this difference in plate thickness, variation in load occurs when pressurizing the workpiece.

JP-A 63-268599

  Therefore, the present invention enables high-precision synchronization and tuning between the press devices connected side by side so that a long workpiece can be bent with high accuracy in one operation. It is an object of the present invention to provide a synchronization / tuning system, synchronization / tuning method, and synchronization / tuning program for a multiple press machine.

In order to achieve the above object, the first invention is a workpiece by converting the output of an AC servo motor into a pressurizing force and transmitting it to a ram that holds the mold, and lowering integrally with the ram. A synchronization / synchronization system for a multiple press machine that connects a plurality of press machines for machining a workpiece side by side and supports machining of a long workpiece exceeding the length of a single die. A ram state detecting means for detecting a ram state by being mounted at a plurality of positions in the width direction of the ram for each of the devices, and a ram state information detected by the ram state detecting means mounted on one of the press devices. Based on the reference, calculate a deviation error from the ram state information detected by the ram state detection means mounted on the ram of the other press device, and correct the ram state of the other press device based on the calculated value of the deviation error By the press device Wherein the ram state of all is anda synchronization and tuning means for servo-controlling the AC servo motor to synchronize and crustaceans.

According to a second aspect, in the first aspect, the ram state information detected by the ram state detecting means is a vertical position of the ram.

According to a third aspect, in the first aspect, the ram state information detected by the ram state detecting means is a pressurizing torque of the ram that changes corresponding to a dimensional error in the plate thickness of the workpiece. And

The fourth invention is, in the first to third one Kano invention, the AC servo motor is provided corresponding to at least two locations in the width direction of each ram of the plurality of the press apparatus, the synchronization and The tuning means calculates the ram state information detected by the ram state detecting means to a feedback value of the AC servomotor and servo-controls the AC servomotor.

The fifth aspect of the invention, in the first to third one Kano invention, comprising a storage means for storing the respective plate thickness difference, of the long workpiece at the installation position of the ram state detecting means, the synchronous The tuning means calculates the ram status information detected by the ram status detection means and the plate thickness difference stored in the storage means to the feedback value of the AC servo motor, and servo-controls the AC servo motor, respectively. Features.

A sixth invention comprises a load fluctuation detecting means for detecting a load fluctuation of the servo motor in the fifth invention, wherein the storage means is a detection output of the load fluctuation detecting means at the time of the previous sheet metal working. On the basis of this, the difference in thickness of each of the long workpieces at the position where the ram state detecting means is disposed is detected and stored.

A seventh aspect of the fifth invention, the long plate thickness detected in advance at a plurality of locations of long workpieces, said storage means, said ram state detecting means detects output interpolation operation to the ram state detecting means The thickness difference of each of the long workpieces at the arrangement position is calculated and stored.

According to an eighth aspect of the present invention, there is provided a plurality of press apparatuses for converting an output of an AC servo motor into a pressurizing force and transmitting the pressure to a ram that holds a mold, and processing a workpiece that is a workpiece by a mold that is lowered integrally with the ram. A method of synchronizing and tuning a multi-press apparatus that connects a table side by side and handles a long workpiece exceeding the length of a single die, and each ram width of the plurality of press devices In at least two places in the direction, the ram state of the ram is detected by the ram state detection means, and the other ram state information detected by the ram state detection means mounted on one of the press devices is used as a reference. The pressing device calculates a deviation error from the ram state information detected by the ram state detecting means attached to the ram of the pressing device, and corrects the ram state of the other pressing device based on the calculated value of the deviation error. All ram conditions Characterized by servo controlling the AC servo motor to period and crustaceans.

According to a ninth aspect of the present invention, there is provided a plurality of press devices for converting an output of an AC servo motor into a pressurizing force and transmitting the pressure to a ram that holds a mold, and machining a workpiece that is a workpiece by a mold that is lowered integrally with the ram. A synchronization / synchronization program for a multi-stage press apparatus that supports the processing of a long workpiece exceeding the length of one die by connecting the bases side by side, and the width of each ram of the plurality of press apparatuses A means for detecting the ram state of the ram at each of at least two points in the direction by means of a ram state detecting means, and a ram state information detected by the ram state detecting means mounted on one of the press devices, Means for calculating a deviation error from the ram state information detected by the ram state detecting means mounted on the ram of the press device, and correcting the ram state of the other press device based on the calculated value of the deviation error Press machine Wherein the ram state of all causes to function the AC servo motor to synchronize - tuning means for servo-control as.

  According to the present invention, since high-precision synchronization / tuning control can be performed between the press devices connected side by side, it is possible to perform bending processing or the like on a long workpiece with high accuracy by a single operation. It is possible to provide an inexpensive press device with good work efficiency.

FIG. 1 is a block diagram showing a schematic configuration of a synchronization / tuning system of a multiple press apparatus according to the present invention. FIG. 2 is a flowchart for explaining an operation of the synchronization / tuning system of the multiple press apparatus shown in FIG. FIG. 3 is a flowchart showing an example of the ram lowering control process of the flowchart shown in FIG. FIG. 4 is a flowchart showing another example of the ram lowering control process of the flowchart shown in FIG. FIG. 5 is a flowchart for explaining another operation of the synchronization / tuning system of the multiple press apparatus shown in FIG.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings attached to the application.

  FIG. 1 is a block diagram showing a schematic configuration of a synchronization / tuning system of a multiple press apparatus according to the present invention.

  In the synchronization / tuning system of the multiple press device of this embodiment, a position detector comprising a linear scale is used as a ram state detecting means for detecting the ram state, and this position detector is provided for each press device. Installed at multiple locations in the width direction of the ram and detected by a position detector attached to the ram of another press device based on the vertical position of the ram detected by the position detector attached to one press device By calculating the deviation error from the vertical position of the ram and correcting the vertical position of the ram of other press devices based on the calculated value of the deviation error, the vertical positions of the rams of all the press devices are synchronized and synchronized. Servo-control the AC servo motor.

  Instead of this position detector, or in addition to this position detector, a pressurizing torque detector that detects the pressurizing torque of the ram that changes in response to the dimensional error of the workpiece thickness is used. A pressurization torque detector is installed in each of the press devices at multiple locations in the width direction of the ram, and the ram pressurization torque detected by the pressurization torque detector attached to one press device is used as a reference. Calculating the deviation error from the ram pressure torque detected by the pressure torque detector mounted on the ram of the other press device, and the ram pressure torque of the other press device based on the calculated value of the deviation error The AC servo motor may be servo-controlled so that the pressurizing torque of all the rams of the press device is synchronized and synchronized by correcting the above.

  In the following embodiments, a description will be given of a case where a position detector composed of a linear scale is used as a ram state detecting means for detecting a ram state, but instead of this position detector or in addition to this position detector. The same applies to the control in the case of using a pressurizing torque detector that detects the pressurizing torque of the ram that changes corresponding to the dimensional error of the workpiece thickness.

  The multiple press type synchronization / tuning system shown in FIG. 1 includes N (N is an integer of 2 or more) press devices 100-1, 100-2,... The press control unit 200 that performs synchronization / tuning control of the N press apparatuses 100-1, 100-2,...

  The press apparatus 100-1 which is the first machine among the N press apparatuses 100-1, 100-2, ... 100-N has a first machine ram 111 and a first machine bed 121, The output of the AC servo motors M1 and M2 used as the pressure drive source is converted into the vertical movement of the first machine ram 111 by the ball screws 131a and 131b to perform, for example, bending sheet metal processing of the long workpiece 300 which is a workpiece. Do.

  Here, the first machine ram 111 of the press machine 100-1, which is the first machine, is provided with a position detector 141a for detecting the vertical position of the first machine ram 111 at the position where the ball screw 131a is arranged, and a ball screw 131b. A position detector 141b for detecting the vertical position of the first ram 111 at the installed position is provided. As the position detectors 141a and 141b, linear scales that respectively detect the absolute position of the first ram 111 in the vertical direction can be used.

  The press machine 100-2 as the second machine has the second machine ram 112 and the second machine bed 122 as in the press machine 100-1 as the first machine, and is an AC servo used as a pressure drive source. The outputs of the motors M3 and M4 are converted into the vertical movement of the second machine ram 112 by the ball screws 132a and 132b to perform bending sheet metal processing of the long workpiece 300 as a workpiece.

  Here, the second machine ram 112 of the press machine 100-2, which is the second machine, is provided with a position detector 142a for detecting the vertical position of the second machine ram 112 at the position where the ball screw 132a is disposed and a ball screw 132b. Position detectors 142b for detecting the vertical position of the second machine ram 112 at the installed position are provided. As the position detectors 142a and 142b, linear scales that respectively detect the absolute position of the second machine ram 112 in the vertical direction can be used as in the first machine 100-1.

  The press machines from No. 3 to No. N are configured in the same manner as the press machines of No. 1 and No. 2 machines.

  The press control unit 200 includes an I / O port 210, a memory 220, a control panel 230, and a control calculation unit 240. The press control unit 200 includes N press apparatuses 100-1, 100-2,. Control.

  Here, the I / O port 210 is servo for each of the AC servomotors M1, M2, M3, M4,... Of the N press apparatuses 100-1, 100-2,. The control signals V1, V2, V3, V4,... Are output, and the position detectors 141a, 141b, 142a, 142b of the N press apparatuses 100-1, 100-2,. Input the detection output of.

  The memory 220 stores various data such as bending data of the long workpiece 300 as well as a control program for the synchronization / tuning system of the multiple press machine. Further, the memory 220 also stores thickness data of the long workpiece 300 corresponding to the arrangement positions of the position detectors 141a, 141b, 142a, 142b,.

  The control panel 230 sets various data such as bending data of the long workpiece 300, and issues an operation start instruction to the press devices 100-1, 100-2,.

  The arithmetic control unit 240 detects various data stored in the memory 220 and position detectors 141a, 141b, 142a, 142b,... Input from the I / O port 210 in response to an operation start instruction from the control panel 230. Based on the output, the servo control signals V1, V2, V3, V4,... Commanding the rotational speed of the AC servo motors M1, M2, M3, M4,. Output to motors M1, M2, M3, M4,.

  Here, the servo control signals V1, V2, V3, V4,... Are subjected to feedback calculation of the detected position deviation data of the detection outputs of the position detectors 141a, 141b, 142a, 142b,. It becomes possible to perform highly accurate synchronization and tuning control of the vertical positions of the rams of the press devices 100-1, 100-2,...

  Further, the servo control signals V1, V2, V3, V4,... Relate to the plate thickness difference of the long workpiece 300 corresponding to the position where the position detectors 141a, 141b, 142a, 142b,. Since the data is also feedback-calculated, it is possible to correct the variation in bending accuracy of the long workpiece 300 due to the thickness of the long workpiece 300.

  FIG. 2 is a flowchart for explaining an operation of the synchronization / tuning system of the multiple press apparatus shown in FIG.

  When the operation of the synchronization / tuning system of the multiple press apparatus shown in FIG. 1 is started, the first machine which is each of the N press apparatuses 100-1, 100-2,. An origin return operation for returning the ram 111, the second machine ram 112,... To the origin that is the top dead center is performed (step 141).

  Next, it is checked whether an operation start instruction is given from the control panel 230 (step 142). If no operation start instruction is given (NO in step 142), the process returns to step 142 and waits for an operation start instruction. When the instruction is given (YES in step 142), the servo commands of the AC servo motors M1, M2, M3, M4,... Are turned on (step 243), and the N pressing devices 100-1, 100-2 are turned on. A ram lowering control process (step 250) for lowering the first ram 111, the second ram 112,.

  In the ram lowering control process in step 250, the rotational speeds of the AC servo motors M1, M2, M3, M4,... Are obtained using the detection outputs of the position detectors 141a, 141b, 142a, 142b,. In this embodiment, one detection output from the position detectors 141a, 141b, 142a, 142b,..., For example, a position is controlled. .., Based on the detection output of the detector 141a as a reference, the deviation from the detection outputs of the other position detectors 141b, 142a, 142b,... 142b,..., 142a,... Are corrected to support AC servo motors M1, M2, M3, M4,. The volume control.

  An example of the ram lowering control process of step 250 in the flowchart shown in FIG. 2 is shown in FIG.

  When the ram lowering control process of step 250 is started, the other position detectors 141b, 142a, 142b,... Are based on the position detector 141a (hereinafter referred to as sensor S1) of the press apparatus 100-1 of the first machine. ... (Hereinafter, referred to as sensor S2,...) And a detection position deviation value ΔSi (i is 1 to N) are calculated (step 251).

  Next, the positional deviation value ΔSi calculated in step 251 is calculated for the feedback value detected by each sensor S1, S2,... To correct the feedback value (step 252). Based on the feedback value calculated in step 252, each AC servomotor Mi (i is 1 to N) is servo-controlled (step 253). And it returns to step 251 and repeats the process of steps 251-253.

  By such processing, the vertical positions of the first machine ram 111, the second machine ram 112,... Of the plurality of press devices 100-1, 100-2,. Tuning control is possible.

  In the ram lowering control process in step 250, the first machine ram 111, the second machine ram 112,..., Which are the rams of the press devices 100-1, 100-2,. The first machine ram 111, the second machine ram 112,... Reach the machining start point of the long workpiece 300 (YES in step 234). Processing control processing of the long workpiece 300 is started (step 260).

  The processing control processing in step 260 is performed based on various data stored in the memory 220, such as bending data of the long workpiece 300, for example.

  If the processing control process in step 260 is a bending control process for the long workpiece 300, the first machine ram 111, the second machine ram 112, ... are pressurized based on the desired data stored in the memory 220. The lowering control is performed to bend the long workpiece 300 to a desired angle.

  Here, the vertical positions of the first machine ram 111, the second machine ram 112,... Of each press apparatus 100-1, 100-2,. Since the synchronization / tuning control is performed, a highly accurate bending process or the like that does not depend on variations in the press apparatuses 100-1, 100-2,.

  Next, it is checked whether or not the machining control process in step 260 has been completed (step 235). If the machining control process in step 260 has not been completed (NO in step 235), the process returns to step 260 and the machining control process in step 260 is performed. However, if it is determined in step 235 that the processing control process in step 260 has been completed (YES in step 235), N of the press devices 100-1, 100-2,... An origin return operation for returning the machine ram 111, the machine ram 112,... To the origin that is the top dead center is performed (step 236), and the workpiece machining process is terminated.

  In the above-described embodiment, a plurality of positions are detected by calculating the detected position deviations of the sensors S1, S2,... As feedback values and servo-controlling the AC servo motors M1, M2, M3, M4,. The vertical workpieces 300-1, 100-2,... 100-N are synchronized and tuned to control the vertical position of the first ram 111, the second ram 112,. However, it is known that this type of long workpiece 300 has minute variations in its thickness in the longitudinal direction. This variation causes a variation in load when machining this type of long workpiece 300, which contributes to a decrease in machining accuracy of the long workpiece 300.

  Therefore, FIG. 4 shows control that takes into account the variation in the thickness of the long workpiece 300 in the longitudinal direction.

  FIG. 4 is a flowchart showing another example of the ram lowering control process of the flowchart shown in FIG.

  In the flowchart shown in FIG. 4, in addition to correcting the detection position deviation of each sensor S1, S2,..., The plate thickness difference of the long workpiece 300 at the detection position of each sensor S1, S2,. Each AC servomotor Mi is servo-controlled by calculating the feedback values detected by the sensors S1, S2,.

  When this process is started, detection position deviation values ΔSi with respect to the other sensors S2,... Are calculated with reference to the sensor S1 of the press apparatus 100-1 of the first machine (step 254).

  Next, the plate thickness value of the long workpiece 300 at the detection position of each sensor S1, S2,... Stored in the memory 220 is read, for example, the thickness of the long workpiece 300 at the detection position of the sensor S1. Using the value as a reference, the plate thickness difference Δti (i is 1 to N) of the long workpiece 300 at the detection position of the other sensors S2,... Is calculated (step 255).

  Then, the positional deviation value ΔSi calculated in step 254 and the plate thickness difference Δti calculated in step 255 are respectively calculated as feedback values detected by the sensors S1, S2,... (Step 256). Each AC servo motor Mi is servo-controlled based on the calculated feedback value (step 257). Then, returning to step 254, the processing of steps 254 to 257 is repeated.

  By such a process, the vertical position of the first machine ram 111, the second machine ram 112,... Of the plurality of press devices 100-1, 100-2,. Considering the variation in the plate thickness, it is possible to perform more precise synchronization / tuning control without causing load variation.

In order to perform control taking into account variations in the thickness of the long workpiece 300, the thickness data stored in the memory 220 corresponding to the detection positions of the sensors S1, S2,. The plate thickness value of the long workpiece 300 at the detection positions S1, S2,... Can be detected in advance and stored in the memory 220 from the control panel 230. plate detects the thickness values, the sensors S1, S2 and the detection value is computed between complement, seeking thickness value of the long object work 300 at the detection position of ..., and the obtained thickness value You may comprise so that it may memorize | store in the memory 220. FIG.

  Moreover, the plate | board thickness value of the elongate workpiece | work 300 in the detection position of each sensor S1, S2, ... is detected at the time of the operation | movement by several press apparatus 100-1,100-2, ... 100-N. The value stored in the memory 220 or the value stored in the memory 220 may be updated.

  FIG. 5 is a flowchart for explaining another operation of the synchronization / tuning system of the multiple press apparatus shown in FIG.

  In the flowchart in FIG. 5, at the detection position of each sensor S <b> 1, S <b> 2,... Stored in the memory 220 based on the processing by the plurality of press devices 100-1, 100-2,. The sheet thickness value of the long workpiece 300 is configured to be stored and updated.

  When the operation of the synchronization / tuning system of the multiple press apparatus shown in FIG. 1 is started, the first machine which is each of the N press apparatuses 100-1, 100-2,. The operation of returning the ram 111, the second machine ram 112,... To the origin that is the top dead center is performed (step 501).

  Next, it is checked whether an operation start instruction is given from the control panel 230 (step 502). If no operation start instruction is given (NO in step 502), the process returns to step 502 and waits for an operation start instruction. When the instruction is given (YES in step 502), the servo commands of the AC servo motors M1, M2, M3, M4,... Are turned on (step 503), and the N press devices 100-1, 100-2 are turned on. ,... 100-N ram lowering control processing (step 510) for lowering the first ram 111, the second ram 112,.

  The ram lowering control process in step 510 is the same as the ram lowering control process shown in FIG.

  Next, it is checked whether or not the first ram 111, the second ram 112,... Have reached the machining start point of the long workpiece 300 by the ram lowering control process in step 510 (step 504). Whether the No. 1 ram 111, No. 2 ram 112, etc. have reached the machining start point of the long workpiece 300 is detected by the load fluctuations of the AC servo motors M1, M2, M3, M4,. This can be easily detected by providing load fluctuation detecting means.

  If it is determined in step 504 that the first machine ram 111, the second machine ram 112,... Have not reached the machining start point of the long workpiece 300 (NO in step 504), the process returns to step 510. Continue the ram down control process.

  If it is determined in step 504 that the first machine ram 111, the second machine ram 112,... Have reached the machining start point of the long workpiece 300 (YES in step 504), each sensor S1 at this time , S2,..., The plate thickness value of the long workpiece 300 at the detection position of each sensor S1, S2,. And the plate | board thickness value of the elongate workpiece | work 300 in the detection position of each detected sensor S1, S2, ... is the length in the detection position of each sensor S1, S2, ... stored in the memory 220. A plate thickness value update process for updating the plate thickness value of the workpiece 300 is executed (step 505).

  By this process, the plate thickness value of the long workpiece 300 at the detection position of the sensors S1, S2,... Can be always kept at an optimum value.

  When the plate thickness value update processing for updating the plate thickness value of the long workpiece 300 at the detection position of each sensor S1, S2,... Is completed, the processing control processing for the long workpiece 300 is started (step 520). . The machining control process in step 520 is the same as the machining control process 260 shown in FIG.

  Next, it is checked whether or not the machining control process in step 520 has been completed (step 506). If it is determined that the machining control process has not been completed (NO in step 506), the process returns to step 520 and the machining control process is continued. However, if it is determined in step 506 that the machining control process has been completed (YES in step 506), the first press ram 111 of N press devices 100-1, 100-2,... An origin return operation is performed to return the second machine ram 112,... To the origin that is the top dead center (step 507), and the workpiece machining process is terminated.

  In addition, in the said Example, the long workpiece | work 300 in the detection position of sensor S1, S2, ... at the time of the processing operation by several press apparatus 100-1,100-2, ... 100-N. The thickness value of the long workpiece 300 at the detection position of each sensor S1, S2,... Stored in the memory 220 is updated. Prior to the processing by the press devices 100-1, 100-2,... 100-N, only the lowering control processing of the plurality of press devices 100-1, 100-2,. Based on the descending control process, the plate thickness value of the long workpiece 300 at the detection position of each sensor S1, S2,... May be detected, and the detected detection value may be stored in the memory 220. .

The present invention is not limited to the above-described embodiments, and many modifications can be made by the ordinary creation ability of those skilled in the art within the scope of the technical idea of the present invention.
The following is the invention described at the beginning of the filing of this application.
<Claim 1>
The output of the AC servo motor is converted into pressure and transmitted to the ram that holds the mold, and a plurality of press devices that process the workpiece, which is the workpiece, are connected side by side by the mold that descends integrally with the ram. , A synchronization / tuning system for multiple press machines that can handle long workpieces that exceed the length of a single die,
A ram state detecting means for detecting a ram state mounted at a plurality of locations in the width direction of the ram for each of the press devices;
Based on the ram state information detected by the ram state detection means mounted on one of the press devices, a deviation error from the ram state information detected by the ram state detection unit mounted on the ram of another press device is determined. Synchronizing / tuning that servo-controls the AC servo motor so that the ram states of all the press devices are synchronized and tuned by calculating and correcting the ram states of the other press devices based on the calculated value of the deviation error Means,
A synchronization / tuning system for a multiple press machine, comprising:
<Claim 2>
The ram state information detected by the ram state detection means is a vertical position of the ram, and the synchronization / tuning system for a multiple press apparatus according to claim 1.
<Claim 3>
2. The multiple press according to claim 1, wherein the ram state information detected by the ram state detecting means is a pressurizing torque of the ram that changes corresponding to a dimensional error of the plate thickness of the workpiece. Equipment synchronization and tuning system.
<Claim 4>
The AC servo motor is
Arranged corresponding to at least two locations in the width direction of each ram of the plurality of press devices,
The synchronization / tuning means includes
The ram state information detected by the ram state detection means is calculated as a feedback value of the AC servomotor to servo-control the AC servomotor, respectively. Synchronization and tuning system for multiple press machines.
<Claim 5>
Storage means for storing a plate thickness difference of each of the long workpieces at an arrangement position of the ram state detection means;
Comprising
The synchronization / tuning means includes
The servo control of each of the AC servo motors is performed by calculating the ram state information detected by the ram state detection means and the plate thickness difference stored in the storage means to a feedback value of the AC servo motor. A synchronization / tuning system for a multiple press apparatus according to any one of claims 1 to 3.
<Claim 6>
Load fluctuation detecting means for detecting a load fluctuation of the servo motor;
Comprising
The storage means
6. A sheet thickness difference of each of the long workpieces at a position where the ram state detecting means is arranged is detected and stored based on a detection output of the load fluctuation detecting means at the time of the previous sheet metal working. Synchronizing / tuning system for multiple presses described in 1.
<Claim 7>
Detecting in advance the plate thickness at multiple locations of the long workpiece,
The storage means
6. The plate thickness difference of each of the long workpieces at the position where the ram state detection means is interpolated to calculate and store the detection output of the plate thickness detection means. Synchronization and tuning system for multiple press machines.
<Claim 8>
The output of the AC servo motor is converted into pressure and transmitted to the ram that holds the mold, and a plurality of press devices that process the workpiece, which is the workpiece, are connected side by side by the mold that descends integrally with the ram. , A method of synchronizing / tuning multiple presses that can process long workpieces that exceed the length of a single die,
At least two locations in the width direction of each ram of the plurality of press devices, the ram state of the ram is detected by the ram state detection means,
Based on the ram state information detected by the ram state detection means mounted on one of the press devices, a deviation error from the ram state information detected by the ram state detection unit mounted on the ram of another press device is determined. Calculate
The AC servo motor is servo-controlled so that the ram states of all the press devices are synchronized and tuned by correcting the ram states of the other press devices based on the calculated value of the deviation error. Synchronization / tuning method for continuous press machine.
<Claim 9>
The output of the AC servo motor is converted into pressure and transmitted to the ram that holds the mold, and a plurality of press devices that process the workpiece, which is the workpiece, are connected side by side by the mold that descends integrally with the ram. , A synchronization / tuning program for multiple presses that can handle long workpieces that exceed the length of a single die,
Means for detecting the ram state of the ram by a ram state detection means at at least two locations in the width direction of each ram of the plurality of pressing devices;
Based on the ram state information detected by the ram state detection means mounted on one of the press devices, a deviation error from the ram state information detected by the ram state detection unit mounted on the ram of another press device is determined. Means for calculating,
Means for servo-controlling the AC servo motor so that the ram states of all the press devices are synchronized and tuned by correcting the ram states of the other press devices based on the calculated value of the deviation error;
Synchronizing / tuning program for multiple press machines, characterized by functioning as

100-1, 100-2, ... 100-N ... Press machine 111 ... No. 1 ram 112 ... No. 2 ram 121 ... No. 1 bed 122 ... No. 2 bed 131a, 131b, 132a, 132b ... Ball screw 141a, 141b, 142a, 142b ... position detector 200 ... press control unit 210 ... I / O port 220 ... memory 230 ... control panel 240 ... control operation unit M1, M2, M3, M4 ... AC servo motor

Claims (8)

The output of the AC servo motor is converted into pressure and transmitted to the ram that holds the mold, and a plurality of press devices that process the workpiece, which is the workpiece, are connected side by side by the mold that descends integrally with the ram. , A synchronization / tuning system for multiple press machines that can handle long workpieces that exceed the length of a single die,
A ram state detecting means for detecting a ram state mounted at a plurality of locations in the width direction of the ram for each of the press devices;
Based on the ram state information detected by the ram state detection means mounted on one of the press devices, a deviation error from the ram state information detected by the ram state detection unit mounted on the ram of another press device is determined. Synchronizing / tuning that servo-controls the AC servo motor so that the ram states of all the press devices are synchronized and tuned by calculating and correcting the ram states of the other press devices based on the calculated value of the deviation error Means,
Storage means for storing a plate thickness difference of each of the long workpieces at an arrangement position of the ram state detection means;
Comprising
The synchronization / tuning means includes
The ram status information detected by the ram status detection means and the plate thickness difference stored in the storage means are calculated as feedback values of the AC servomotor, and each AC servomotor is servo-controlled. Synchronization and tuning system for die press machine.   The ram state information detected by the ram state detection means is a vertical position of the ram, and the synchronization / tuning system for a multiple press apparatus according to claim 1.   2. The multiple press according to claim 1, wherein the ram state information detected by the ram state detecting means is a pressurizing torque of the ram that changes corresponding to a dimensional error of the plate thickness of the workpiece. Equipment synchronization and tuning system. The AC servo motor is
Arranged corresponding to at least two locations in the width direction of each ram of the plurality of press devices,
The synchronization / tuning means includes
The ram state information detected by the ram state detection means is calculated as a feedback value of the AC servomotor to servo-control the AC servomotor, respectively. Synchronization and tuning system for multiple press machines. Load fluctuation detecting means for detecting a load fluctuation of the servo motor;
Comprising
The storage means
Claim and detects and stores the respective plate thickness difference between the long workpiece at the installation position of the ram state detecting means based on a detection output of the load fluctuation detecting means in the previous sheet metal 1 A synchronization / tuning system for a multiple press apparatus according to any one of claims 1 to 3 . The plate thickness detection means detects the plate thickness at a plurality of locations of the long workpiece in advance,
The storage means
4. The plate thickness difference of each of the long workpieces is calculated and stored by interpolating the detection output of the plate thickness detection means to position the ram state detection means. A synchronization / tuning system for a multiple press apparatus according to any one of the preceding claims.
The output of the AC servo motor is converted into pressure and transmitted to the ram that holds the mold, and a plurality of press devices that process the workpiece, which is the workpiece, are connected side by side by the mold that descends integrally with the ram. , A method of synchronizing / tuning multiple presses that can process long workpieces that exceed the length of a single die,
At least two locations in the width direction of each ram of the plurality of press devices, the ram state of the ram is detected by the ram state detection means,
Based on the ram state information detected by the ram state detection means mounted on one of the press devices, a deviation error from the ram state information detected by the ram state detection unit mounted on the ram of another press device is determined. Calculate
Servo-controlling the AC servo motor so that the ram states of all the press devices are synchronized and tuned by correcting the ram states of the other press devices based on the calculated value of the deviation error ,
Storing each plate thickness difference of the long workpiece in the arrangement position of the ram state detection means in the storage means;
In the servo control,
A multiplex state type wherein the ram state information detected by the ram state detection means and the plate thickness difference stored in the storage means are calculated as feedback values of the AC servo motor to control the AC servo motors respectively. Method for synchronizing and tuning press equipment. The output of the AC servo motor is converted into pressure and transmitted to the ram that holds the mold, and a plurality of press devices that process the workpiece, which is the workpiece, are connected side by side by the mold that descends integrally with the ram. , A synchronization / tuning program for multiple presses that can handle long workpieces that exceed the length of a single die,
Means for detecting the ram state of the ram by a ram state detection means at at least two locations in the width direction of each ram of the plurality of pressing devices;
Based on the ram state information detected by the ram state detection means mounted on one of the press devices, a deviation error from the ram state information detected by the ram state detection unit mounted on the ram of another press device is determined. Means for calculating,
Means for servo-controlling the AC servo motor so that the ram states of all the press devices are synchronized and tuned by correcting the ram states of the other press devices based on the calculated value of the deviation error;
Means for storing a plate thickness difference of each of the long workpieces at an arrangement position of the ram state detecting means;
To function as,
The servo control means is
Multiple-wherein by calculating the thickness difference stored in ram state information and the storage means ram state detecting means detects the feedback value of the AC servo motor, and Rukoto wherein to each servo controlling the AC servo motor Synchronization / tuning program for die press machine.

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