JPH0516984B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a schedule management method in an FMS (Flexible Manufacturing System), and in particular, the present invention relates to a schedule management method in an FMS (Flexible Manufacturing System). This invention relates to a schedule management method that automatically calculates a processing schedule based on data collated with each pallet and promotes work in each department. Recently, factory automation has progressed,
Neither the traditional mass production method nor the decimal precision method,
We will respond to the most diverse and flexible needs.
We are entering the era of FMS, and in this era, creating work schedules that rely on human subjectivity and thinking as in the past is highly flawed, and the standards for creating work schedules also depend on the work side, the machine side, If the center is centered only on either the side or the tool side, the result will be biased and insufficient. Therefore, the schedule management method in FMS is based on the comprehensive work schedule of the factory production management system, and
It must be able to take into account a variety of data from the work, machine, and tool sides, flexibly respond to interruptions at any time, and make effective use of the schedule for each location. In view of the above problems, it is an object of the present invention to collate the data of each lot and each pallet based on the comprehensive work schedule of the factory production management system, and to flexibly orientate the system with room for interruption. It is an object of the present invention to provide a schedule management method that automatically calculates a machining schedule to be carried out and efficiently promotes work in each department based on the machining schedule. In order to achieve the above objects, the present invention has the following features:
FMS all work schedule data...Order disassembly procedure'' is converted into FMS consisting of workpiece quantity, workpiece machining start date, delivery date, machining priority, etc.
In the schedule management method of managing the work schedule by creating a machining schedule for each workpiece through data arithmetic processing from the total work schedule data, the required number of pallets is calculated from the work quantity of the total work schedule data. , a lot division procedure that calculates the required number of processing lots from the processing start date and delivery date and assigns a lot division number; and a palletization process that sequentially allocates each required pallet to each processing lot on a daily basis based on the calculated values. A pallet division procedure that assigns a division order and a pallet number, and an order number in a file in which schedule numbers and pallet numbers, etc., created by the lot division number and pallet division order, are arranged. is assigned to each order, and the workpiece, machining start date, delivery date, and machining priority in all the work schedule data are referred to, and the machining start date, machining end date, and machining end date are assigned for each order using the schedule number.
and an order division procedure for allocating priority order of processing according to the order number of the file, to create processing schedule data. Hereinafter, the present invention will be explained in detail with reference to examples and drawings. FIG. 1 is a schematic diagram of an FMS line suitable for implementing the present invention. In FIG. 1, the system is roughly composed of a management department and a work department, and the management department includes a line management control section 100 and a general management control section 101. The line management control unit 100 flexibly manages the flow of each machining process during system online according to the schedule, and the general management control unit 101 located above it controls NC data as preparation information, tool management data, and machining schedule. Comprehensive understanding and management of data, setup schedule data, etc. The line management control section 100 and the general management control section 101 are connected to each other via a modem (modulation/demodulation device) between CCUs (communication control units), and transmit and receive data. In the work department, the main controller 102 sequentially processes the data sent from the line management control unit 100.
NC machine 103a, 103b, 103c, 103b
NC devices 104a, 104b, 104c, 10
Give commands to 4d. Along with the line management control unit 100, the main control device 102 and the NC device 104a,
104b, 104c, and 104d are linked to an optical data highway 105, and are adapted to take in necessary data as and when required via an NLU (Network Linkage Unit).
The main controller 102 is also connected to a ground platform 110 that controls an unmanned truck 108 and a stacker crane 109 that run on tracks 106 and 107. Further connected to the setup station 111 are an operation panel 112 that mainly controls manual setup operations, and a terminal 113 that inputs setup information and displays setup instructions. According to the schedule management method of the present invention, which will be described later, the worker operates the terminal 113 to output setup schedule data and processing schedule data created by load calculation, and confirms the daily work schedule. At the setup station 111, necessary workpieces and pallets are selected from the workpiece storage 114 and pallet storage 115, and the workpieces are attached to the pallets using the required tools at the mounting station 116. The pallets P that have been prepared according to that day's schedule are stored in the setup-side pallet stocker 117. Various pallets are prepared in the pallet storage 115 mentioned above. The type of pallet is determined by the number of workpieces installed and loaded and the processing method. Second
The figure shows examples of various pallets on which workpieces are mounted. The flat plate pallet P01 shown in Fig. 2A can normally accommodate 1 to 4 workpieces, but loading one workpiece is appropriate in a process in which workpieces are processed from 5 directions, and in a process in which workpieces are processed in only one direction. Now, you can attach four workpieces. The convex pallet P02 (FIG. 2B) is suitable for attaching two workpieces, and the prismatic pallet P03 (FIG. 2C) is suitable for attaching and machining four workpieces to each surface. Palette P0 shown in Figure 2 D and Figure 2 E
4 and P05 are examples of special pallets (L-shaped, triangular prism), which may be adopted depending on the processing method, and various other pallets are required. Additionally, different types of pallets are available depending on the work size. Under the control of each FMS control system in Figure 1,
The pallet P prepared in the setup-side pallet stocker 117 is temporarily held at a predetermined position in the machine-side pallet stocker 118 by the stacker crane 109. A desired pallet P is conveyed by an unmanned cart 108 according to a command from the main control device 102, and is carried into, for example, an NC machine 103b in a process MC49.
The processed pallet P is transferred to the next process by the unmanned cart 108 or placed in the machine side pallet stocker 118. FIG. 3 is an explanatory diagram showing an example of a schedule management method in a processing schedule creation procedure according to the present invention. In Fig. 3, total work schedule data 1 is instructed from the host computer that comprehensively manages the entire factory production to the FMS computer (Fig. 1, general management control section 101). First, processing schedule data 1a as shown in Table 1 is extracted from the total work schedule data 1.

[Table] The above data 1a is further sorted by FMS process extraction criteria, and the corresponding machine code in FMS,
For example, FMS workplace C with MC49 in the table above
Only the schedule data of 1 is extracted, and the result is as shown in Table 2.
FMS schedule data 1b is created.

【table】

Claims (1)

[Claims] 1. From the total work schedule data of FMS consisting of workpiece quantity, workpiece processing start date, delivery date, processing priority, etc., a processing schedule for each workpiece is created by data calculation processing and work is performed. In the schedule management method for managing schedules, the required number of pallets is calculated from the work quantity of the total work schedule data, the required number of machining lots is calculated from the machining start date and delivery date,
a lot division procedure for assigning a lot division number; a pallet division procedure for sequentially allocating each required pallet to each processing lot on a daily basis based on calculated values and assigning a pallet division order and a pallet number; the lot division procedure; An order number is assigned to each order to a file in which schedule numbers and pallet numbers are arranged based on the lot disassembly number and the pallet division order, created by the pallet division procedure, and all work schedules and schedule numbers are assigned to each order.
Refer to the machining start date, delivery date, and machining priority of the workpiece in the data, and use the schedule number to allocate the machining start date, machining end date, and machining order priority for each order based on the order number of the file. The method is characterized in that processing schedule data is created by including an order splitting procedure.
Schedule management method in FMS.