JP2966446B2 - Processing system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a loading station, a buffer station, a machine tool, a transfer device for transferring a work therebetween, and transfer management for controlling the transfer device. The present invention relates to a processing system including a device and a DNC management device that transfers processing data to a machine tool.

<Prior Art> Such a conventional processing system includes a loading station for loading a work on a pallet, a plurality of machine tools for processing a work on a loaded pallet, a buffer station capable of storing a plurality of the pallets, and A transfer device that transfers the pallet between the buffer station, the loading station, and the machine tool, a transfer management device that controls the transfer device according to the processing state of the work, and a process required to process the work DNC (Direc) that transfers data to each machine tool
t Numerical Control), and there is an apparatus provided with an NC memory unit provided in the machine tool for storing the processing data. Conventionally, when a work input for each lot is carried into the machine tool, the machining data for the first work in the lot is transferred to the NC memory section of the machine tool, and the remaining work of the same lot is transferred. Is processed based on the processing data registered in the NC memory unit.However, there is a limit to increasing the storage capacity of the NC memory unit, so the processing data to be transferred next can be stored in the NC memory unit. So, NC
The used processing data stored in the memory is deleted after processing the lot.

<Problem to be Solved by the Invention> However, in the above-described processing data transfer method, when the lot number is large and the data transfer is frequently performed, the data processing speed of the DNC management device causes The work is in a state of waiting for processing on the machine tool before the processing data is transferred to the machine tool side, causing a problem that the operating efficiency of the machine tool is reduced. In addition, the DNC management device may also serve as an automatic programming device, and during processing data transfer, the processing speed of the automatic programming device may be reduced, which may hinder work efficiency.

<Means for Solving the Problems> According to the present invention, a storage unit for storing a part number of machining data transferred from a DNC management device and stored in an NC memory unit of a machine tool, A transfer stop unit for preventing the processing data of the product number stored in the storage unit from being transferred when transferring the processing data to the NC memory unit of the
Manages the frequency of use of machining data stored in the NC memory of the machine tool and deletes the less frequently used machining data when the storage capacity of the NC memory is insufficient when transferring the machining data to the NC memory of the machine tool And an NC memory protection unit.

Further, the storage unit stores a flag indicating that the specific processed data is a permanently registered product, and the NC memory protection unit does not delete the processed data flagged with the permanent registered product regardless of the use frequency. It was done.

<Operation> Based on the processing data transferred from the DNC management device,
The workpiece is processed by the machine tool. This machining data is stored in the NC memory unit in the machine tool, and is applied to a work of the same lot that is carried in at any time. And NC
The part number of the machining data transferred to the memory part is stored in the storage part of the DNC management device at the same time, and when transferring the processing data to the NC memory part of the machine tool, the part number of the processing data to be transferred is already stored in the storage part. If it is stored, it is not transferred to the NC memory unit according to the instruction of the transfer stop unit. Also, when transferring machining data to the NC memory of the machine tool, the capacity space for storing the machining data to be transferred is increased.
When the data is not in the NC memory, the NC memory protector deletes the less frequently used processed data from the processed data stored in the NC memory, leaving a free space in the storage capacity of the NC memory. The processed data to be transferred can be stored. By acting in this manner, the transfer time of frequently used processing data can be omitted, so that there is no waiting time for processing and the working efficiency is improved.

In addition, regardless of the frequency of use, the processed data flagged with the permanent registered product is not deleted.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a transport path 10 indicates a movable course of a transport device (transport vehicle) 11 that transports a pallet P. The transport path
Each of the machine tools MC1, MC2, MC3 arranged along 10 has a pallet changer PC1, PC on which two pallets can be placed.
2, Loading station LS where PC3 is installed and pallet P is loaded or unloaded
Station BS for storing pallets and pallets P
Are provided along the transport path 10.

Next, the control system will be described. As a configuration of the transfer management device 20 shown in FIG. 1, first, a first central processing unit (hereinafter, referred to as a first CPU) 21 is provided. This second
The 1CPU 21 is connected to a first CRT screen 23 for displaying a menu screen and a first keyboard 24 for inputting a menu, and a magnetic disk device 26 for storing data input from the first keyboard 24. The first CPU 21 controls the transfer of the transfer device 11 via the interface 27 based on the input data, and controls the machine tools MC1, MC2, MC3.
Also, a signal for notifying the transfer status of the transfer device 11 is sent.

Reference numeral 30 denotes a DNC management device that sends machining data to the machine tools MC1, MC2, and MC3. The DNC management device 30 is provided with a second central processing unit (hereinafter, referred to as a second CPU) 31. The second CPU 31 is connected to a second CRT screen 33 and a second keyboard 34 for inputting processing data necessary for processing a workpiece,
The second CPU 31 is connected to a magnetic disk device 36 that stores data input from a second keyboard 34.

The machine tools MC1, MC2, and MC3 are equipped with NC (numerical control) devices NC1, NC2, and NC3 that control a processing method according to a workpiece, and these NC devices NC1, NC2, and NC3 are provided with workpieces. NC memory units 41 and 4 for storing machining data related to machining methods
2,43 are provided respectively. These NC memory units 41, 42, 43
Is connected to the second CPU 31 via the interface 44, and receives a processing data signal from the second CPU 31.

The second CPU 31 includes a storage unit 50, a transfer stop unit 51, and an NC memory protection unit 52. The NC memory units 41, 42, 43
The part number of the work is also registered in the storage unit 50 at any time in accordance with the processing data registered in. If the processed data to be transferred to the NC memory units 41, 42, and 43 has already been registered in the storage unit 50, the processed data is not transferred by the transfer stopping unit 51. Further, the NC memory protection section 52 allows the NC memory section 4
If the processed data is registered in 1,42,43 in order of use frequency, and there is no free space in the storage capacity of NC memory units 41,42,43,
By deleting registered infrequently used data and securing an empty space in the storage capacity, processed data to be transferred can be registered.

The transfer management device 20 and the DNC management device 30 are connected via an interface 20a and an interface 30a, and information is transmitted so that the machine tools MC1, MC2, MC3, and the transfer device 11 work together as a system.

Next, a method of transferring processing data in the above-described processing system will be described with reference to the drawings.

In FIGS. 1 and 2, a work is first loaded into the machine tool MC1, and when processing data is required to process the work, the DNC management device 30 sends the work data from the DNC 30 to the NC device NC1.
A request for processing data is sent to the NC memory unit 41 (6
0). FIG. 3 is a table showing the frequency of use of the processed data in the storage unit 50, in which numbers are assigned in order from the least frequently used part number. Can be registered as a permanently registered product. The transfer stop unit 51 automatically compares the processed data requested to be transferred with the table of FIG. 3 (61), and the part number of the processed data matches the part number of the data registered in the table of FIG. In this case, it is confirmed that the machining data requested to be transferred has been registered in the NC device NC1, so that the data is not transferred. For example, when the data requested to be transferred is the same as the product number of No. 2 in the table of FIG. 3, the product numbers of No. 3 and No. 4 are moved to No. 2 and No. 3, respectively. The product number that was found in .2 is registered in the position of No. 4 as being frequently used (62).

On the other hand, if the processed data requested to be transferred is untransferred data, the second CPU 31 checks whether there is a free space in the storage capacity in the NC memory unit 41 where data can be registered (63). When there is (64), the processing data is transferred (65). Further, as for this processed data, the product number of the data is registered in the storage unit 50 at the No. 5 position where the frequency of use is highest as shown in FIG. 4 (66). Conversely, when there is no free space, the NC memory protection unit 52 permanently registers the product N
The part numbers that are not used frequently except for o.1 (the part number at the position of No. 2 in Fig. 4) are erased with priority, and at the same time, the machining data registered in the NC memory unit 41 corresponding to that part number is erased. (67), No.3, No.4 and No.5 in Fig. 4
Moved to No.2, No.3 and No.4, respectively.
Registered as shown.

By transferring such processing data, the processing data actually used for processing, that is, frequently used data,
It is stored in the lower part (Nos. 4 and 5) of the NC memory unit 41, and is stored in the NC memory unit.
This is because data with a low frequency of use is stored in the upper 41 (Nos. 2 and 3).

Therefore, even if only a limited number of machining data is stored, the frequency of transferring machining data from the DNC management device to the NC memory unit is reduced, and there is no time for the workpiece to wait until the machining data is transferred, The operating rate of machine tools is improved. In addition, the burden on the DNC management device 30 is reduced, and for example, the processing speed during automatic programming is improved.

<Effect of the Invention> As described above, in the present invention, in the DNC management device, the part numbers of the processing data transferred to the NC memory unit on the machine tool side are simultaneously registered in the storage unit, and are registered in the storage unit. If the processed part number data matches the processed data to be transferred, the transfer stop unit prevents the data from being transferred, and the frequency of processing data used in the NC memory unit is controlled by the NC memory protection unit. When a free space with the capacity of the NC memory part is managed and required, the least frequently used ones are deleted preferentially.Therefore, each time a work with a large number of lots is carried into the machine tool, it is processed. Since there is no need to transfer data, there is no need to wait for machining of workpieces until data is transferred, which improves the operation efficiency of machine tools and reduces the data processing burden on the DNC management device. The processing speed can be improved.

[Brief description of the drawings]

Drawings show an embodiment of the present invention, FIG. 1 shows an overall configuration diagram of the present invention, FIG. 2 is a flowchart showing a method of transferring machining data of a workpiece, and FIGS. FIG. 4 is an explanatory diagram of a use frequency ranking table in a storage unit according to the embodiment. 11 ... Transfer device, 20 ... Transport management device, 21 ... First CPU,
30 ... DNC management device, 31 ... Second CPU, 41, 42, 43 ... NC memory unit, 50 ... Storage unit, 51 ... Transfer stop unit, 52 ... NC memory protection unit, LS ... Loading station , BS ……
Buffer station.

Claims (2)

(57) [Claims] 1. A loading station for loading a work on a pallet, a plurality of machine tools for processing a work on the loaded pallet, a buffer station capable of storing a plurality of the pallets, the buffer station, the loading station, and the loading station. A transfer device for transferring a pallet between each of the machine tools, and an NC memory unit that is built in the machine tool and stores processing data,
In a processing system provided with a transfer management device that controls the transfer device according to the processing state of the work, and a DNC management device that transfers processing data necessary for processing the work to each of the machine tools, the DNC management The apparatus has a storage unit for storing the part number of the processing data transferred from the DNC management device and stored in the NC memory unit of the machine tool, and the transfer unit for transferring the processing data to the NC memory unit of the machine tool. A transfer stop unit for preventing the transfer of the machining data of the part number stored in the storage unit, and managing the use frequency of the machining data stored in the NC memory unit of the machine tool, and machining the NC memory unit of the machine tool. An NC memory protection unit configured to erase the infrequently used processing data when the storage capacity of the NC memory unit is insufficient when transferring data. Processing system. 2. The processing system according to claim 1, wherein the storage unit stores a flag that designates specific processing data as a permanent registration product, and the NC memory protection unit determines the frequency of use. Regardless, the processing data to which the flag of the permanent registration product is added is not deleted.