KR100963515B1 - Machine tool numerical control device of PC-based multi CPU structure - Google Patents

Abstract

The present invention relates to a numerical value control apparatus for a machine tool having a PC-based multi-CPU structure, the numerical control apparatus for a PC-based machine tool provided with a second CPU for interfacing with a first memory for numerical control and a third memory of an external PC, A first memory provided in the first CPU to independently execute a machining program; A shared memory coupled to each CPU for data sharing of each CPU; And a second memory provided in the second CPU and equipped with an operating system to select and execute a machining program independently.

NC, numerical control, memory, PC-based, part program, registration, external operation

Description

Machine Tool Numerical Controlling Device Of PC Based Multi CPU Structure

1 is an operation flowchart of a conventional numerical control device for machine tools,

2 is a block diagram of a numerical control device according to the present invention;

3 is a conceptual diagram of a processing program processing method using the numerical control device according to the present invention;

4 is an operation flowchart of the numerical control device according to the present invention.

<Description of the code | symbol about the principal part of drawing>

100: first CPU 110: first memory

200: second CPU 210: second memory

220: serial port 300: third CPU

310: shared memory 1000: numerical control device

2000: third memory

The present invention relates to a numerical control device of a machine tool, and more particularly, to introduce a PC-based NC (Numerical Control) concept, a built-in PC that acts as an interface to the numerical control device, and a memory equipped with an operating system The present invention relates to a machining program processing apparatus for a numerically controlled machine tool having a structure capable of performing a machining program more quickly and accurately when processing an external machining program.

In general, a numerically controlled machining operation for a machine tool is to execute and process a machining program in the form of a G-CODE stored in a dedicated OS memory device. However, if an external machining program is loaded and processed in the machine tool, the external machining program is typically transmitted to a numerical control device of the machine tool by connecting a serial port such as RS232 to a punching device or an external PC memory.

However, in the execution of an external part program using an external PC in the conventional external part program processing method of the above method, a buffering process according to data transmission between the external PC and the numerical controller is included, so that the communication between the external PC and the numerical controller is performed. There is a problem of machining instability due to phase instability, instability of program loading as the reading operation is continued on the hard disk until the end of the loaded machining program.

In other words, during communication between the external PC and the numerical control device, the processing program is loaded and transmitted, thereby buffering work in accordance with information exchange between the main memory of the PC and the numerical control device, which is a peripheral device. As a result, a considerable time is required for transmission, and if there is a loss of information data during transmission, an error occurs and this causes a disruption in processing.

Referring to the process of loading and processing an external machining program in the conventional numerical controller as shown in FIG. 1, an external machining program is stored in an external memory in the external PC.

The conventional numerical control method is a method of operating in an external operation mode using such an external machining program or in an internal operation mode using a machining program of an internal main memory.

At this time, the external operation mode is processed entirely in the PC's external memory, which results in buffering and communication of information data between the PC and the numerical control device.

First select a machining program. The program then selects whether the part program is stored in main memory or external memory in the PC. This is a process of selecting whether or not the external operation mode.

If the machining program is in the main memory of the numerical control device, the machining cycle is executed immediately and the machining is executed in the machine tool.

By the way, if the program is in the external memory in the PC, the external operation mode is executed and the machine performs the machining cycle after executing the machining cycle after checking whether the transfer condition is met.

As described above, the external machining program loads and processes the stored data in the external memory of the PC. If an error occurs during loading, buffering, or transfer, a problem of machining failure or processing stop occurs.

 Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and a first object of the present invention is a structure for selecting an external machining program from an internal memory equipped with an operating system for performing a machining program for faster machining. To provide a numerical control device for a machine tool with a PC-based multi-CPU structure.

A second object of the present invention is to provide a numerical control device for a machine tool of a PC-based multi-CPU structure of a structure which enables more stable data transfer by the main memory being buffered when the machining program is executed in the external memory.

The object of the present invention, in the numerical control device for a PC-based machine tool equipped with a first CPU for numerical control and a second CPU for interfacing with a third memory of the external PC,

A first memory provided in the first CPU to independently execute a machining program;

A shared memory coupled to each CPU for data sharing of each CPU; And

It is achieved by the numerical control device for a machine tool of a PC-based multi-CPU structure, characterized in that it comprises a; second memory provided in the second CPU and the operating system is mounted to select a machining program to perform independently.

In this case, the first memory preferably executes a processing program of the second or third memory to be registered.

The first memory may be switched to a buffer memory when the processing program of the second memory or the third memory is executed alone.

It is also preferable that the second memory is an EPROM on which a Windows-based operating system is mounted.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

Hereinafter, a numerical control apparatus for a machine tool of a PC-based multi-CPU structure according to the present invention will be described in detail with the accompanying drawings.

2 is a configuration diagram of a numerical control device according to the present invention, Figure 3 is a conceptual diagram of a processing program processing method using the numerical control device according to the present invention.

As shown in Figures 2 and 3, the numerical control device 1000 is a PC-based CNC (PC Based CNC) device, a numerical control dedicated PC for the numerical control and processing of the transmission program from an external PC built-in Structure.

The numerical control device 1000 is largely comprised of a numerical control unit which is basically built-in and performs exclusively numerical control, and an interface PC unit performing an interface function between the numerical control unit and an external PC.

The numerical controller comprises a first CPU 100 dedicated to numerical control and a first memory 110 provided in the first CPU 100. The first memory 110 performs a dedicated processing program or performs a processing program registered and transmitted from the outside. In addition, when executing the part program in each of the external memory, that is, the second memory 210 of the interface PC or the third memory 2000 of the external PC, it functions as a buffering memory for data transmission of the part program.

In addition, the interface PC includes a second CPU 200 that is embedded for an interface between the first CPU 100 and an external PC. At this time, the interface PC has a third CPU 300 that is embedded for the interface of the servo system. In addition, a shared memory 310 is built in to share data between the CPUs.

In this case, the second CPU 200 is provided with a second memory 210. The second memory 210 is an EEPROM on which a Windows-based operating system (for example, Windows 98, Windows 2000, etc.) is mounted. The second memory 210 processes a built-in processing program alone or is processed in the first memory 110. The program may be transmitted and registered so that the processing program may be processed in the first memory 110. However, if the second memory 210 is to be performed alone, data should be transmitted to the first CPU 100 through the first memory 110. In this case, the first memory 110 performs buffering.

In addition, the second CPU 200 is connected to the third memory 2000 of the external PC as a serial port 220, USB, RS232C or LAN is connected. Accordingly, if the processing program can be registered from the third memory 2000 to the first memory 110, it is also possible to perform external operation in the third memory 2000. In this case, as mentioned above, the first memory 110 is used as a buffer memory.

As shown in FIG. 3, the numerical control device 1000 having such a structure adopts a driving method for selecting a machining program in the numerical control device 1000 in the external operation mode. Since the second memory 210 is equipped with an operating system, even if a processing program of an external PC is used, it is not selected by the external PC but directly selected and loaded by the numerical control apparatus 1000, thereby processing time. Can shorten.

The selected machining program is then registered in the first memory 110 or determined whether the selected machining program is to be executed in the stored second memory 210 or the third memory 2000, and then processed after the analysis.

That is, in addition to the basic method of processing the machining program embedded in the first memory 110, in processing the machining program of the second memory 210 or the machining program of the third memory 2000, the second memory 210 is processed. In the case of processing the processing program of the first memory 110 and then register in the first memory 110 and the processing method in the second memory 210 while transferring using the first memory 110 as a buffer memory There is a way.

When the processing program of the third memory 2000 of the external PC transmitted through the serial port 220 is processed, since the second memory 210 is mounted with an operating system, the second memory 210 to the third memory. Register the machining program of (2000) in the first memory 110 to convert the first memory (110) to a buffer memory to be processed in the first memory (110) or to directly execute the machining program in the third memory (2000). .

If the third memory 2000 of the external PC directly transmits the program data to the numerical controller 1000 without the second memory 210, the buffering operation is performed on the external PC itself and the process of selecting the program is performed externally. This slows down the processing speed.                     

However, in the numerical control device 1000 according to the present invention, selection of the external processing program is processed in the second memory 210 built in the numerical control device 1000, that is, the processing program in the numerical control device 1000. Can be selected and the first memory 110 is responsible for this during buffering, thereby enabling faster processing.

4 is an operation flowchart of the numerical control device according to the present invention. As shown in Fig. 4, a machining program is first selected. At this time, it is first determined whether the machining program is in the first memory 110.

If the selected machining program is that of the first memory 110, the machining cycle is immediately performed to execute the machining and end.

Otherwise, if the selected part program is that of the second memory 210 or the third memory 2000, it is determined whether to register the part program.

If it is to be registered, go to the first memory 110 to register and perform processing. If not registered, the user is asked whether to execute the external operation mode, selects whether the second memory 210 or the third memory 2000 is a machining program, and again determines whether to register the first memory 110.

In this case, when the selected machining program is registered in the first memory 110, the machining program moves to the first memory 110 to process the machining program in the first memory 110. Otherwise, the part program is processed in the second memory 210 or the third memory 2000.

In the numerical control apparatus 1000 for the machine tool of the PC-based multi-CPU structure according to the present invention as described above, the number of the second memory 210 is within the allowable range compared to the processing speed of the second CPU 200. Can be used to increase.

The operating system mounted on the second memory 210 may use a Windows-based operating system such as Windows NT, Windows XP, Linux-based operating system, Units-based operating system, etc. in addition to Windows 98 and Windows 2000.

According to the numerical control apparatus for a machine tool having a PC-based multi-CPU structure according to the present invention as described above, the external machining program can be easily stored by storing the machining program in the external PC memory using a procedure called registration in the memory in the numerical controller. One feature is possible.

In addition, there is an advantage that the loading and execution of a more stable and fast machining program is possible with the built-in memory equipped with an operating system to select an external machining program from the inside.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims are intended to cover such modifications or changes as fall within the scope of the invention.

Claims (3)

In the numerical control device for a PC-based machine tool provided with a first CPU 100 for numerical control and a second CPU 200 for interfacing with a third memory 2000 of an external PC, A shared memory 310 connected to each CPU for data sharing of each CPU; The second CPU 200 is equipped with an operating system of the numerical control device for the PC-based machine tool, and processes the machining program alone, the external machining program from the third memory (2000) of the external PC A second memory 210 which selects and loads the external machining program from the third memory 2000 directly by the numerical control apparatus for the PC-based machine tool through the operating system when selected; And It is provided in the first CPU 100 to perform the processing program alone, or buffering the data transmission of the external program in the third memory (2000) or the transmission of the program data by the second memory (210) A first memory 110 performing one or more of performing a memory function; Numerical control device for a machine tool of a PC-based multi-CPU structure, characterized in that it comprises a. delete The numerical control apparatus for a machine tool of claim 1, wherein the second memory (210) is an EPROM equipped with a Windows-based operating system.

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