JP3320891B2 - Production equipment control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production equipment control apparatus for sequentially performing a predetermined work on a work at a plurality of work stations arranged along a work transfer line.

[0002]

2. Description of the Related Art Conventionally, as shown in, for example, JP-A-3-246704, a conveying jig for conveying a work (work in process) accommodated in a lot, and a predetermined processing is performed on the work. In a manufacturing line having a plurality of manufacturing steps, by transmitting and receiving information between first information transmitting and receiving means provided in the lot and second information transmitting and receiving means provided in each step, It is known that information on the lot is automatically collected by a lot management control unit without the intervention of an operator so that the status of a work-in-progress in a manufacturing process at any time can be accurately grasped. .

[0003]

In the conventional apparatus described in the above publication, the lot management control unit centrally manages information on lots located in each process, and the lot management control unit controls each process. Since the processing machine provided in each step is operated in accordance with the output drive command signal to perform a predetermined machining process on the workpiece, the control device of the production line is designed. In this case, the entire circuit must be designed collectively, and a control circuit diagram, a flowchart, and the like cannot be created unless the overall specification is determined. Therefore, the time required for the design of the control device is increased, and the entire control circuit must be changed when the configuration of the control device is changed in accordance with a change in the specification, which makes the operation complicated. was there.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to easily design a control means and to easily carry out a design change accompanying a change in specifications. It is intended to provide a device.

[0005]

The invention according to claim 1 is
In a production equipment control device in which a plurality of work stations are installed along a work transfer line, in each work station, a work machine having a plurality of drive units and a control unit for controlling the work machine are provided, In this control means, a plurality of drive control units for individually controlling each of the drive units, a communication control unit for performing data communication with another work station, and the communication control unit and the drive control unit. From the main control unit to control and each of the above drive control units
Assign an identification number to the data signal output to the data path
Sub-control unit, and each drive unit provided in the work machine is individually
Unitize multiple drive control units to be controlled separately
And a drive unit driven by the drive control unit
Condition determination unit that determines whether or not the condition for activation is satisfied
And an operation signal output for outputting an operation command signal to the drive unit.
Unit and an abnormality that detects that an abnormality has occurred in the drive unit
A detection unit is provided for each unit and provided for the control unit.
A plurality of drive control units, a communication control unit, and a main control unit.
Are connected by a common data path,
Data output from the communication control unit to other work stations
The identification number assigning unit that assigns the identification number to the signal
Each work provided in the control unit and output from the communication control unit
Drives transport lines based on station status data
And a transport line control section for outputting a drive command signal to the section .

[0006] The invention according to claim 2, keep production equipment control apparatus according to the first aspect, to convey the workpiece individually between each station based on the state data of the work station which is output from the communication control unit A transport line control unit for outputting a transport command signal is provided.

[0007]

According to the first aspect of the present invention, the main control section provided in the control means of each work station is provided in its own work station in accordance with a data signal output from another work station. working machine by whether the operable state is determined and, together with the autonomous operation of the working machine is carried out, by replacing the units that constitute the respective drive unit, depending on the design changes Further, the configuration of each drive control unit can be easily changed . In addition, in the activation condition determining means provided in each of the drive control units, the drive unit of the work machine corresponding to its own drive control unit can be operated according to a data signal or the like output from another drive control unit. Is determined, the autonomous driving of this driving unit is performed , and the data signal indicating the control state of each driving control unit is transmitted to another driving control unit and the main control unit via a common data path. Section. Further, the drive control unit and the main control unit determine which drive control unit outputs the data signal according to the identification number of the data signal output to the data path from each drive control unit. At the same time, according to the data signal output from the communication control unit of each work station,
At the time when it is confirmed that the work on the work is completed in each of the work stations, a control signal for operating the drive unit of the transfer line is output to the transfer line control unit,
Transport of the work is performed, and whether the data signal output from one of the work stations in accordance with the identification number of the data signal outputted from each of the work stations is determined at each of the work stations and the transport line control unit Will be.

According to the second aspect of the present invention, when the work of its own work station is completed and the transfer line control unit confirms that the start condition of the work station of the next process is satisfied, etc. The work is individually conveyed between the corresponding work stations.

[0009]

FIG. 1 shows an embodiment of a production control apparatus according to the present invention. This production control device has a transfer line 1 for transferring a work, and a plurality of work stations 2 and 3 installed along the transfer line 1. The work stations 2 and 3 are provided with transfer machines and the like. Work machine 4, control means 5 for sequence-controlling the work machine 4, and a transfer for transferring a work by operating a drive unit of the transfer line 1 based on state data output from each of the work stations 2 and 3. And a transport line controller 1a for outputting a command signal.

The working machine 4 includes a spindle drive section 6 for rotating and driving a spindle of a tool such as a drill, a head change drive section 7 for exchanging a tool attached to the spindle, and a feed drive for moving the tool. And a positioning drive unit 9 for positioning the work at the processing position.
In addition, the work machine 4 is provided with an auxiliary equipment driving unit 10 for driving auxiliary equipment such as a hydraulic pressure supply unit, a coolant supply unit, and a drive air supply unit.

The above-mentioned control means 5 comprises:
, A drive control unit including a spindle control unit 11, a head change control unit 12, a feed control unit 13, a positioning control unit 14, and an ancillary equipment control unit 15 for individually controlling the drive control units 11 to 10. And a main control unit 16 for controlling the following communication control unit 19 and the like, and an input control unit 1 for inputting an operation command signal to the main control unit 16
7 and a communication control unit 19 for performing data communication with the other work stations 3 and the transport line control unit 1a via the in-line network 18.

The control means 5 includes an auxiliary equipment control unit 20 for controlling auxiliary equipment (not shown), such as a display panel, and the like.
A subroutine control unit 21 for executing control when a failure occurs in each of the drive units 6 to 10;
, A sub-control unit 22 for assigning an identification number to the data signal output from the main control unit 16 to the main control unit 16;
2 and a common data path including a common bus 23 connecting the two to each other.

As shown in FIG. 2, the drive control units 11 to 16 for individually controlling the drive units 6 to 10 of the work machine 4 are output from the main control unit 16 and other drive units, respectively. A start condition determination unit 24 that determines whether a start condition of a drive unit corresponding to a data signal, that is, a drive unit controlled by its own drive control unit is satisfied, and the drive unit when the start condition is satisfied. An operation signal output unit 25 that outputs an operation command signal at a predetermined timing, and an abnormality detection unit 26 that detects that an abnormality has occurred in the drive unit and outputs an abnormality detection signal to the main control unit 16. ing.

As shown in FIG. 3, the main control section 16 receives an operation command signal for preparing the operation of the working machine 4 in accordance with the operation command signal and the like input from the input control section 17 and the auxiliary control signal. Operation preparation control unit 2 to output to equipment control unit 15
7, a data reading unit 28 that reads data for determining whether or not the work implement 4 of the own work station 2 is in an operable state based on state data output from another work station 3; A special flag unit 29 for temporarily assigning a specific number of the common bus 23 to the logical signal developed in the data reading unit 28 and temporarily storing the same, and status data of each of the driving units 6 to 10 output from the sub-control unit 22 And a data writing unit 30 for writing.

The input control section 17 comprises a man-machine interface operated by an operator, and inputs, for example, an operation signal for automatically operating the work machine 4 of the own work station 2 and an operation signal for manual operation. Is configured. Further, the communication control unit 19 includes:
As shown in FIG. 4, a receiving unit 31 which receives status data of another work station 3 and the like input through the in-line network 18 and outputs the status data to the main control unit 16 as shown in FIG. A transmission unit 32 for transmitting the status data of the own work station 2 output from the main control unit 16 to another work station 3 or the like via the in-line network 18, and data output from the transmission unit 32 And an identification number assigning unit 33 for assigning an identification number to the signal.

As shown in FIG. 5, the auxiliary device control unit 20 includes a power supply control unit 35 for supplying drive power from a power supply to each unit in response to an operation command signal output from the main control unit 16.
In response to an output signal or the like from the main control unit 16, that the actuator 4 is in the operating state on the display board, or that each driving unit 6
And a display control unit 36 that outputs a display command signal for displaying that a failure has occurred in any one of the devices.

The subroutine control section 21 temporarily stores abnormal data when it is confirmed that a failure has occurred in any of the driving sections 6 to 10 of the actuator 4 and at a predetermined timing. It is configured to output to the other work stations 3 and the transport line controller 1a via the communication controller 19.

The control operation performed by the control means 5 having the above configuration will be described with reference to the flowchart shown in FIG. When the control operation starts, the input control unit 17
Is operated and the power command is turned on by the power control unit 35 of the auxiliary device control unit 20 when the operation command signal and the like are input.
By controlling the supply of drive power to each unit as a state, and by outputting an operation command signal from the operation preparation control unit 27 of the main control unit 16 to the auxiliary equipment control unit 15, the auxiliary equipment drive unit 10 is operated. To perform operation preparation control (step S1), or, if necessary, to perform a failure recovery operation at the time of an emergency stop.

Next, in the data reading section 28,
By reading the status data of the other work station 3 input to the communication control unit 19 and the status data of the auxiliary equipment driving unit 10 output from the auxiliary equipment control unit 15, the work machine 4 of the own work station 2 reads the status data. In addition to performing logical development to determine whether or not it is in an operable state (step S
2) In the special flag unit 29, the developed logic signal is replaced with a specific number of the common bus 23 and held temporarily, that is, until the control operation of one scan is completed (step S3).

In the sub control unit 22, an identification number corresponding to a specific number of the common bus 23 is assigned to the data signal output from each of the drive control units 11 to 15 to the main control unit 16 via the common bus 23. (Step S
4) The main control unit 16 outputs an operation command signal to each of the drive control units 11 to 15 (step S5). Next, in each of the drive control units 11 to 15, by operating each of the drive units 6 to 10 of the actuator 4, operations such as perforating a work are performed (step S6).

The identification number assigning section 33 of the communication control section 19 includes a data writing section 30 of the main control section 16.
An identification number corresponding to its own work station 2 is attached to the data signal indicating the operation state of the work machine 4 output from the above, and the work processing of the work has been completed or a failure has occurred in a specific drive unit. The status data indicating the fact is output to another work station 3 via the in-line network 18 at a predetermined timing (step S7).

The control operation of the head change drive unit 7 by the head change control unit 12 among the control operations executed in step S7 will be described with reference to the flowchart shown in FIG. This control operation is started in response to a control signal output from the main control unit 16. First, in a start condition determination unit 24 of the head change control unit 12, the start of the servo motor provided in the head change drive unit 7 is started. When it is determined that the condition is satisfied (step S11), an operation command signal is output from the operation signal output unit 25 to the servomotor (step S1).
2).

After the servo motor is driven at a predetermined timing (step S13), the abnormality detecting section 2
In step 6, an abnormal operation of the servo motor is detected (step S14). Next, a data signal indicating the operating state of the servomotor and the presence or absence of an abnormal operation is output to the sub-control unit 22 and given an identification number.
And outputs the data signal to the main control unit 16 and the subroutine control unit 21 via the common bus 23 (step S15).

In step S11, when it is confirmed that the starting condition of the clamp provided in the head change drive unit 7 is satisfied, the operation signal output unit 25 is activated.
Outputs an operation command signal to the clamp actuator (step S16), and drives the actuator at a predetermined timing (step S17).
After the abnormality detecting section 26 detects the operation abnormality of the actuator (step S18), the process proceeds to step S15.

In step S11, when it is confirmed that the conditions for starting the clutch provided in the head change drive section 7 are satisfied, the operation signal output section 25 is activated.
Outputs an operation command signal to the clutch (step S
19) The clutch is driven at a predetermined timing (step S20), and after the abnormality detecting section 26 detects an abnormal operation of the clutch (step S21), the process proceeds to step S15.

As described above, the head change drive unit 7 of the work machine 4 is operated to change the tool attached to the main shaft, and the operation data indicating that the change work has been completed, or the head change drive. Abnormal data indicating that a failure has occurred in the unit 7 is written to the data writing unit 30 of the main control unit 16 and output to another drive control unit or another work station 3 or the like as necessary. Then, when it is confirmed that the predetermined work on the work has been completed in accordance with the status signal output from each of the work stations 2 and 3 to the transfer line control unit 1a, a drive for operating the drive unit of the transfer line 1 is performed. The command signal is output, and the work is conveyed to the next process.

In the production equipment control apparatus in which a plurality of work stations 2 and 3 are installed along the work transfer line as described above, the drive units 6 to 10 of the work machine 4 provided in the work station 2 are controlled. A plurality of drive control units 11 to 15 for controlling the respective drive units 6 to 10
And a communication control unit 19 for performing data communication with another work station 3 and a main control unit 16 for controlling the communication control unit 19 and the drive control units 11 to 15 as a whole. The work stations 2 and 3 can be operated autonomously.

Therefore, each work station 2, 3 can be individually designed before the overall specifications are determined, so that the time required for the design can be shortened and a part of each work station 2, 3 can be designed. The design change accompanying the specification change can be easily performed. In addition, when the production of each of the work stations 2 and 3 is completed, the quality of the work can be confirmed in advance by individually performing a trial run.

The drive control units 11 to 15 for controlling the drive units 6 to 10 are unitized as described above.
Therefore, when a design change to a part of the drive unit 6-10 occurs, it is possible to perform only the improved corresponding to the design change to replace the corresponding unit very easily.

Further, as described above , each of the drive control units 11 to
A start condition determining unit 24 for determining whether or not a start condition of a corresponding drive unit is satisfied for a unit constituting the unit 15, and an operation signal output unit 25 for outputting an operation command signal to the drive unit
And an abnormality detection unit 26 for detecting that an abnormality has occurred in the drive unit, so that it is controlled by its own drive control in accordance with state data output from the main control unit 16 and other drive control units. By judging whether or not the drive unit is in an operable state, the drive unit can be driven autonomously. Therefore, each of the drive control units 11 to 15
Can be individually designed and manufactured, and a design change or the like accompanying a change in specifications can be easily performed.

Further, the respective drive control units 11 to 15 provided in the control means 5 as described above, the main control unit 16, the communication control unit 19 and the like are connected by a common data path comprising the common bus 23. because thus constructed, it is possible to simplify the structure of the communication circuit, it is possible to suppress the manufacturing cost cheaper, the improvement due to design change or the like, can be performed more easily.

Further, as described above, each of the drive control units 11 to 1
5 is provided with a sub-control unit 22 for giving an identification number to the data signal output to the main control unit 16 via the common bus 23,
The sub control unit 22 applies the common bus 2 to the data signal.
Since the configuration is such that the specific number of 3 is given, it is possible to confirm which of the drive control units output the data in response to the data signal in the other drive control units and the main control unit 16. There is an advantage that a part of each of the drive control units 11 to 15 can be redesigned as needed without changing the contents of the main control unit 16 at all.

A transport line control unit 1a for outputting a drive command signal to a drive unit of the transport line 1 based on the status data of each work station 2, 3 output from the communication control unit 19 of each control means 5 is provided. and therefore, when the work has been confirmed that the finished each of work stations 2 and 3 in accordance with the state data, the work automatically collectively to be able to be conveyed to a subsequent step, each by the host computer The configuration of the transfer control unit can be simplified as compared with a case where the work state of the work station and the transfer state of the transfer line are respectively controlled.

When it is confirmed that the work of each of the work stations 2 and 3 has been completed, the drive unit of the transfer line 1 is actuated to replace the above-described structure in which the works are collectively transferred. When the work of its own work station is completed, and when it is confirmed by the transfer line control section 1a that the condition for raising the work station in the next process is satisfied, the work is individually transferred between the work stations. May be configured.
In such a configuration, works that can be conveyed can be sequentially conveyed, so that the time required for conveyance can be effectively reduced.

Further, as described above, an identification number assigning unit 33 for assigning an identification number to a data signal output from the communication control unit 19 to another work station 3 is provided. since that is configured to impart a specific number of lines in the network 18, to confirm whether the information output from any work station in accordance with the data signal in the other work stations, and the transport line control unit 1a There can, the conveyance control and the like in the transfer line control unit 1a can be performed easily and properly.

In the above-described embodiment, an example has been described in which the control device according to the present invention is applied to a production facility provided with a working machine 4 composed of a transfer machine for punching a work or the like in a work station 2. The configuration of the present invention can also be applied to a production facility control device having a work machine for assembling a work or a work machine for painting a work.

[0037]

As described above, according to the present invention, in a production equipment control apparatus having a plurality of work stations installed along a work transfer line, each drive unit of a work machine provided in the work station is provided. The control means to control
A plurality of drive control units that control each drive unit, a communication control unit that performs data communication with another work station, and a main control unit that controls the communication control unit and each of the drive control units. With the provision, each work station can be operated autonomously. Therefore, each work station can be individually designed before overall specifications are determined,
It is possible to shorten the time required for design, and to easily make design changes due to a change in the specifications of each work station.When the production of each work station is completed, The trial operation has the advantage that the quality can be confirmed in advance.

Further, since the respective units of the drive control unit for controlling the drive units, when a design change to a part of the drive unit occurs, corresponding to the design change simply by replacing the corresponding unit The above-mentioned improvement can be performed very easily, and when a part of the drive unit is broken down, inspection, repair, and the like can be easily performed.

Also , a starting condition determining section for determining whether or not a starting condition of a driving section driven by each driving control section is satisfied, an operation signal output section for outputting an operation command signal to the driving section, An abnormality detection unit that detects that an abnormality has occurred in the drive unit is provided in each of the units, so that the unit is controlled by its own drive control according to state data output from the main control unit and another drive control unit. By determining whether or not the drive unit is in an operable state, the drive unit can be driven autonomously. Therefore, it is possible to individually design each drive control unit at the time of manufacturing, and it is possible to easily perform a design change or the like accompanying a change in specifications.

Further, the respective drive control unit provided in the control unit, because of the structure and a communication control unit, a main control unit to be connected by a common data path, it is possible to simplify the structure of the communication circuit This has the advantage that the manufacturing cost can be reduced and the improvement accompanying a design change or the like can be performed more easily.

Further, the sub-control unit for imparting an identification number to the data signal output to the main control unit or the like via a common data path from the drive control unit is provided, the data path to the data signal by the sub-control unit Since the configuration is such that the specific number is given, it is possible to confirm which of the drive control units output the data in response to the data signal in the other drive units and the main control unit. There is an advantage that a part of each drive control unit can be redesigned as necessary without changing the contents of the unit.

Further , a transport line control section for outputting a drive command signal to the transport line drive section based on the status data of each work station output from the communication control section of the control means is provided. When it is confirmed that the work of each work station has been completed, the work can be automatically transferred to the next process, and the work state of each work station and the transfer state of the transfer line are respectively controlled by the host computer. The configuration of the transport control unit can be simplified as compared with the case where the configuration is made as described above.

Further, since the identification number is given to the data signal output from the communication control unit to another work station, it is possible to determine which work station the information is output from in response to the data signal. At the work station and the transfer line control unit, and the transfer control and the like at the transfer line control unit can be easily and appropriately executed.

Further, the invention according to claim 2 is applicable when the work of the work station is completed, and the transfer line control section confirms that the condition for raising the work station in the next process is satisfied. Since the works are individually conveyed between the work stations, the works that can be conveyed can be sequentially conveyed, so that there is an advantage that the time required for the conveyance can be effectively reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a production equipment control device according to the present invention.

FIG. 2 is a block diagram illustrating a configuration of a drive control unit.

FIG. 3 is a block diagram illustrating a configuration of a main control unit.

FIG. 4 is a block diagram illustrating a configuration of a communication control unit.

FIG. 5 is a block diagram illustrating a configuration of an auxiliary device control unit.

FIG. 6 is a flowchart showing a control operation in a control means.

FIG. 7 is a flowchart showing a control operation in a head change control unit.

[Explanation of symbols]

Reference Signs List 1 transport line 2, 3 work station 4 work machine 5 control means 6 to 10 drive unit 11 to 15 drive control unit 16 main control unit 19 communication control unit 22 sub-control unit 23 common bus (common data path) 24 start condition determination Unit 25 operation signal output unit 26 abnormality determination unit 33 identification number assigning unit 1a transport line control unit

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-35311 (JP, A) JP-A-5-104387 (JP, A) JP-A-4-314103 (JP, A) JP-A-6-103 3361 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B23Q 41/00 G05B 19/418

Claims (2)

(57) [Claims] 1. A production equipment control device having a plurality of work stations installed along a work transfer line, a work machine having a plurality of driving units in each work station, and control means for controlling the work machines. A plurality of drive control units for individually controlling each of the drive units, a communication control unit for performing data communication with another work station, and the communication control unit and the drive control unit. a main control unit for generally controlling the parts, each
The data signal output from the drive control unit to the data path
A sub-control unit for assigning a different number is provided, and
Multiple drive control units that individually control each drive unit
Unit, and driven by the drive control unit.
Determines whether the start condition of the driven unit is satisfied
Outputs an operation command signal to the start condition determination unit and the drive unit.
That the operation signal output section and the drive section
Each unit is provided with an abnormality detection unit for detecting
A plurality of drive control units provided in the control unit, and a communication control unit
And the main control unit by a common data path
In both cases, the above communication control unit goes out to another work station.
Assigning an identification number to an input data signal
Unit is provided in the communication control unit and output from the communication control unit.
Based on the status data of each work station
A transport line that outputs a drive command signal to the drive unit of the feed line
Production equipment control apparatus characterized by comprising a control unit. 2. A transfer line control unit for outputting a transfer command signal for individually transferring a work between stations based on status data of each work station output from a communication control unit. Item 2. The production equipment control device according to Item 1 .