KR100521857B1 - Unmanned machining control method of machine tool - Google Patents

Abstract

According to the present invention, in an unmanned processing system having a machine tool and an automatic pallet changer, a first step (S1) of checking the number (order) of the waiting pallet, followed by a second step (S2) of searching the program number of the waiting pallet ), A third step (S3) of checking whether the program of the pallet exists in the machine, a fourth step (S4) of downloading the program if not present, a fifth step (S5) of checking whether the download is completed, If the part program exists in step S3 or the download is completed in step S5, the sixth step S6 of deleting all programs except the waiting pallet program downloaded after the end of the current part program and performing the part program Unmanned machining control method of a machine tool, characterized in that to perform,

The machine side machining program can be downloaded and saved according to the current machining program and the waiting pallet, and the other programs can be deleted while the two programs are always stored. It can be minimized.

Description

Unmanned machining control method of machine tool

The present invention relates to a method for unmanned machining control of a machine tool, and downloads and saves the machining program corresponding to the current machining program and the waiting pallet and the other programs are always deleted by deleting the mode. The present invention relates to a method for controlling unmanned machining of a machine tool that can minimize the storage capacity of a machine-side machining program because it can be processed while storing.

In general, a machine tool, particularly a vertical machining center, is provided with a pallet 3 for placing a workpiece thereon at a lower portion of the spindle unit 2 that is moved by a column 1 as shown in FIG. 1, and is attached to the spindle unit 2. The tool 4 is made to exchange and use the tool of the tool magazine 6 using the automatic tool changer 5.

FIG. 2 is a block diagram showing a configuration for controlling the operation of a machine tool, in particular, a machining center, a numerical control unit 13 for recognizing a command of the main operation panel 11 and controlling it through a program in the program storage unit 12; And a programmable controller 14, a machine input / output unit 15, a machine controller 16, an automatic tool changer 17, and an automatic pallet changer 18 that command sequence control according to the instruction of (13). . The numerical controller 13 controls the commands of the spindle driver 19 and the servo driver 21. Denoted at 20 is a spindle motor, at 22 a servo motor, at 17-1 at a manual operation panel of the automatic tool changer 17, at 18-1 at a manual operation panel of the automatic pallet changer 18.

The general machine tool configured as described above performs a general operation of Korean Patent Publication No. 96-13175, and a detailed description thereof will be omitted. However, in the unattended automation of the machining center with the machine tool (DNC; Direct NC) automatic pallet changer 18 which connects and controls several machine tools to one host computer including this basic configuration, the machining program for pallets is always Since it must be stored in the internal (or external) memory unit of the machine control unit 16 in advance, when the capacity of the machining program is large, the memory unit expansion of the machining center must be preceded for unattended operation. In terms of cost, the memory capacity that is expensive and expandable also has limitations, which is a constraint on unmanned automation. Also, as the types of workpieces are changed, it is inconvenient to input and output the machining program of the workpieces.

2 is a diagram conceptually showing an example of a protocol with a numerical control unit of a machine tool using a general host computer. When the communication program is operated from the host computer 10 to the numerical control unit 13 (P1), the numerical control unit (13) accordingly completes the waiting of the machining program and sends a waiting completion signal to the host computer 10 (P2). The host computer 10 then transmits the machining program so that the numerical control unit 13 downloads it (P3). Upon completion of storing the downloaded machining program in the program storage unit 12, the numerical control unit 13 transmits the fact that the download is completed to the host computer 10. The machining is then performed according to the downloaded machining program. Normally, the part program is numbered and divided, and the part program number is set to O00001-O9999. Among them, up to O7999 consists of general machining program, O8000-O8999 is user-specific program, and O9000-O9999 is special program for supplier. However, since the capacity of the machining program part 12 must bear the capacity for storing the machining program of the previous process, a large capacity is required.

It is an object of the present invention to provide an unmanned automated control method of a machine tool which minimizes the capacity of a machining program to enable unmanned automation without a large memory.

To this end, in the unmanned processing system using a host computer and a machine tool, the present invention downloads only the machining and waiting pallet machining programs to the host computer and the machine control unit, and sequentially sets the programs in the memory unit. Download the machining program and delete the machining program of the finished pallet from the machine memory so that only two machining programs are always needed in the memory of the machine control unit.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

4 is a flowchart of the present invention, in an unmanned processing system having an automatic pallet changer, a first step (S1) of checking the number (order) of waiting pallets, followed by a second step of searching for a program number of the waiting pallet; Step S2, a third step S3 of checking whether a program of the corresponding palette exists in the machine, a fourth step S4 of downloading the corresponding program if not present, and a fifth step S5 of checking whether the download is completed. ), If the machining program exists in the step S3 or the download is completed in the step S5, the sixth step of deleting all but the program of the waiting pallet downloaded after the end of the current machining program and executing the machining program Perform (S6). In the step S5, if the download is not normally terminated, an alarm sounds (step S7).

The operation of the present invention configured as described above will be described. Since the structure itself is the same, it demonstrates with reference to the structure of FIG. 3 and FIG. The computer 10 reads the waiting pallet number of the automatic pallet changer 18 through the numerical control unit 13 through a normal communication protocol (step S1), and processes the processing program corresponding to the waiting pallet to the computer 10. The program is searched by its own program storage unit 12 (step S2).

Then, it is checked whether the machining program of the pallet exists in the program storage unit 12 (step S3). If the processing program is not stored in the program storage unit 12, the host computer 10 downloads the storage processing program of the computer itself to be stored in the program storage unit 12 on the machine side (step S4).

When the host computer 10 recognizes the normal end signal of the download on the machine side (step S5), the current machining program is deleted except for the current machining program and the corresponding machining program of the downloaded waiting pallet. The program and the down program are continued, and the initial step is repeatedly performed (step S6). In the step S3, if the machining program exists on the machine side, the step S6 is immediately performed without performing the download. In addition, if there is no normal termination of the download in the step (S5), the alarm is to be solved (step S7).

The present invention described above is not limited to the above-described embodiments and drawings, and various permutations, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be apparent to those who have

As described above, according to the present invention, in an unmanned machining system in which a machine tool is connected to a host computer to perform mutual control and collective control, a machining program of a machine side is downloaded and stored corresponding to a current machining program and a waiting pallet. The other programs can be deleted while the mode is deleted so that two programs can always be stored and processed, minimizing the machine-side machining program storage capacity.

1 is a configuration diagram showing an example of a general machining center,

2 is a block diagram showing an example of a general machine tool;

3 is a configuration example showing a protocol of a general host computer and a machine tool;

4 is a flowchart of the present invention.

※ Explanation of code about main part of drawing ※

10; host computer 12; program storage unit

13; numerical control unit

Claims (1)

In an unmanned machining system having a machine tool and an automatic pallet changer, a first step (S1) of checking the number (order) of the waiting pallet, followed by a second step (S2) of retrieving the program number of the waiting pallet, corresponding Third step (S3) to check whether the program of the pallet exists in the machine, fourth step (S4) to download the program if it does not exist, fifth step (S5) to check whether the download is completed, step (S3) In step S5, if the machining program exists or the download is completed in the step S5, the sixth step S6 is performed to delete all programs except the waiting pallet program downloaded after the current machining program is finished. Unmanned machining control method for machine tools