JPH07129677A - Production simulation device - Google Patents

Abstract

PURPOSE:To reduce data generation man-hour, to improve data accuracy and to improve the follow-up property to an environmental variation by generating automatically model data for executing a simulation, based on production actual result data collected from a production line. CONSTITUTION:A production actual result data input means 1 collets production actual result data in which a working start and a working end of each process of a production line are recorded. A reference data generating means 2 adds up the collected production actual result data, and generates reference data of the number of equipment sets, an equipment operation rate, a working time, etc. A parameter input means 3 inputs a parameter of designation, etc., of the throw-in quantity of a lot and an equipment stop time being different at every simulation from a data input terminal 11. A simulation executing means 4 reads in those reference data and parameter, executes a simulation evaluation and outputs its result data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production simulation apparatus for simulating the state of production in a production factory, and in particular, it executes a simulation that faithfully reflects the state of the production site at that time, and the subsequent production. The present invention relates to a production simulation device that highly accurately predicts the situation of (1) and determines a method of inputting a work into a production process, a start order in each facility, and the like.

[0002]

2. Description of the Related Art A conventional production simulation apparatus includes reference data input means for defining a simulation model such as the number of equipment, equipment operation rate, and machining time, and parameter input means for inputting parameters such as a work input plan.
The production status collecting means for collecting the production status at the time of executing the simulation and the simulation executing means for executing the simulation are included.

As an example of a reference document of the above-mentioned conventional production simulation apparatus, for example, Japanese Patent Laid-Open No. 63-312.
There is a production control system that predicts 050 production status.

[0004]

In the above-mentioned conventional production simulation apparatus, the model of the production line such as the number of production facilities and the operating rate and the model of the work such as the processing time at each facility of the work to be introduced are It must be defined by operating the terminal.

For this reason, the conventional production simulation apparatus takes a lot of time and labor to define a model of a large-scale production line, and as a result, mistakes often occur in the definition of the model. have.

[0006] Further, although the data forming the model often changes in accordance with a change in the environment surrounding the production line, the conventional production simulation device has a drawback that it cannot follow this.

An object of the present invention is to automatically create model data for performing simulation based on the production result data collected from the production line, reduce the number of data creation steps, improve the data accuracy, and improve the environment. An object of the present invention is to provide a production simulation device capable of achieving improvement in followability to changes.

[0008]

The production simulation apparatus according to the first aspect of the present invention comprises: (A) production result data input means for collecting production result data in which start and end of machining in each process of the production line are recorded one by one. (B) a reference data creating unit that collects the production result data collected by the production result data inputting unit and creates reference data defining a simulation model such as the number of equipments, an equipment operating rate, and a machining time; Parameter input means for inputting simulation parameters, such as designation of a different lot input amount and equipment down time each time the simulation is executed, and (D) reading reference data from the reference data creating means and parameters from the parameter input means. Then, the simulation evaluation is executed and the result data is output. It is configured to include a translation executing means.

The production simulation apparatus of the second invention collects (A) production performance data in which the start and end of processing in each step of the production line are recorded one by one,
(B) The collected production performance data is aggregated to create reference data that defines a simulation model such as the number of equipment, equipment operation rate, and processing time, and (C) the input amount of a different lot each time the simulation is executed, This includes inputting simulation parameters such as designation of equipment stop time, (D) reading the reference data and the simulation parameters, executing the simulation evaluation, and outputting the result data.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the production simulation apparatus of the present invention. As shown in FIG. 1, the production simulation apparatus 10 of the present embodiment is configured to include a production performance data input means 1, a reference data creation means 2, a parameter input means 3 and a simulation execution means 4 inside.

Then, the production record data input means 1 starts and finishes machining in each process of the production line from the production facilities 30-1, 30-2, ... 30-n through the local area network 20. It collects the production record data that is recorded point by point.

Further, the reference data creating means 2 collects the production result data collected by the production result data inputting means 1 and creates reference data defining a simulation model such as the number of equipment, equipment operating rate, and machining time. ing.

On the other hand, the parameter input means 3 inputs from the data input terminal 11 simulation parameters such as the designation of the lot loading amount and the facility stop time which are different each time the simulation is executed.

Therefore, the simulation executing means 4 is
The reference data obtained from the reference data creating means 2 and the parameters obtained from the parameter input means 3 are read, the simulation evaluation is executed, and the result data is output.

FIG. 2 is a flow chart showing an example of the operation of inputting the record data in the record data input means 1. As shown in FIG. 2, the production record data input means 1 is, at step 101, the production facility 30- of the production line.
1, 30-2, ... 30-n is waiting to receive a signal for starting and ending the machining of the workpiece, and in step 102, it stands by unless a corresponding signal is detected.

Therefore, in step 103, step 10
If a signal indicating the start or end of processing is detected in step 2, the signal is sequentially registered in the database, the process returns to step 101, and the process waits for the next signal.

FIG. 3 is a flow chart showing an example of the reference data creating operation in the reference data creating means 2. As shown in FIG. 3, the reference data creating means 2 uses the actual data collected by the actual data inputting means 1 in step 201 to start processing of the same equipment under the same processing conditions.
Sorting is done on the paired data that have been processed.

Further, in step 202, the processing time of each processing condition in each equipment is calculated by collecting and summing the time difference between the processing start and the processing end. In addition,
There are various ways to aggregate data, such as taking the average of multiple data under the same conditions, taking the maximum value, and taking the most frequent value.
You can take the appropriate method depending on the situation.

Next, in step 203, the data regarding the equipment of the same name is arranged, and the number of data of the pair of processing start and processing at the same time is counted to calculate the number of the equipment of the same name. ing. It should be noted that the data on the number of facilities is often obtained by knowing the number of facilities on the relevant production line, but there are also facilities that are not actually used. Is often more accurate for actual production line simulations.

Therefore, in step 204, the operating time of the equipment is calculated by measuring the time when the equipment is occupied in a certain fixed period from the data of the processing start and the processing end and dividing by the total time. There is. Also, step 205
Then, the reference data such as the machining time, the number of equipment, and the equipment operating rate thus obtained are stored internally as data for describing the simulation model.

Further, FIG. 4 is a flow chart showing an example of a simulation execution operation in the simulation executing means 4. As shown in FIG. 4, in step 301, the simulation executing means 4 inputs the parameters such as the data inputting the work input plan and the equipment stop time input from the data input terminal 11 by the parameter input means 3. There is.

Next, in step 302, the reference data created by the reference data creating means 2 is read and combined with the above parameters. Then, in step 303, from the performance data read by the performance data input means 1, data representing the state of the line at the time when the simulation is started, such as the data of the work in progress on the line, is read, and It is combined with the parameter data and reference data read in. When the above data preparation is completed, simulation is executed in step 304.

[0023]

As described above, the production simulation apparatus of the present invention collects and aggregates the production performance data of the production line to create the reference data defining the simulation model without human intervention. Therefore, it is possible to easily create a high-precision simulation model and also to create a simulation model that matches the changes in the characteristics of the production line due to environmental changes. It has the effect of being able to give instructions for efficient production.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a production simulation apparatus of the present invention.

FIG. 2 is a flowchart showing an example of an operation of inputting actual data in actual data input means 1.

FIG. 3 is a flowchart showing an example of an operation of creating reference data by reference data creating means 2.

FIG. 4 is a flowchart showing an example of a simulation execution operation in the simulation execution means 4.

[Explanation of symbols]

 1 Production Actual Data Input Means 2 Reference Data Creation Means 3 Parameter Input Means 4 Simulation Execution Means 10 Production Simulation Equipment 11 Data Input Terminals 20 Local Area Networks 30-1, 30-2, ~ 30-n Production Equipment

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G06F 17/00 8724-5L G06F 15/20 D

Claims (2)

[Claims] 1. A production record data input means for collecting production record data in which start and end of processing in each process of a production line are recorded, and (B) production collected by the production record data input means. Reference data creating means for creating reference data that defines a simulation model such as the number of equipment, equipment operating rate, and processing time by accumulating actual data, and (C) different lot input amount and equipment down time each time the simulation is executed. Parameter input means for inputting simulation parameters such as designation, and (D) reading the reference data from the reference data creating means and the parameters from the parameter input means, executing simulation evaluation, and outputting the result data. And a simulation execution means. Configuration equipment. 2. (A) Collecting production performance data in which the start and end of processing in each process of the production line are recorded one by one, and (B) collecting the production performance data collected, and accumulating the number of equipments and equipment availability. , Creating reference data that defines the simulation model such as machining time, and (C) inputting simulation parameters such as different lot input amount and facility stop time each time the simulation is executed, and (D) the reference data. And a production simulation device, which reads the simulation parameter, executes the evaluation of the simulation, and outputs the result data.