KR19980083295A - G-Code Extension Method of Numerical Controller - Google Patents

Abstract

The present invention relates to a method for extending a geocode of a numerical controller. In the related art, it is not only difficult to know what shape the created program processes, but also various calculations such as tool positions are required to create a program. There is a problem that requires a lot of time and effort because of difficulty in understanding the program when modifying the program written in.

Accordingly, the present invention has been devised to solve the above-mentioned conventional problems, and provides a method of internally simplifying a machining program for a complex closed polygon using a new G-code, and beforehand before creating a part program. By defining the contour data, there is an effect of eliminating an error in the part program creation and increasing the efficiency of the numerical controller.

Description

G-Code Extension Method of Numerical Controller

The present invention relates to a method for expanding a geocode of a numerical controller. In particular, in order to process closed polygon pockets for milling, the conventional method of defining both an internal path and a path of a contour in a part program includes a polygon contour and a processing margin, The present invention relates to a method for expanding a G-code of a numerical controller that facilitates the creation of a part program by defining only parameters such as a cutting distance and a cutting depth of an internal path, and improves an internal processing speed.

One part program consists of a description, program number, cutting conditions commands, interpolation commands, cutting conditions cancellation commands and auxiliary device commands. Wherein, the description section is not a program, but information for describing the program, that is, a comment portion of the machine used, the creation date, the type of tool, etc., the program number is a portion indicating the sentence number of the command section, the cutting condition command section In order to machine a workpiece, the machine must indicate the operating conditions of the machine or other working conditions, in which the conditions such as the starting point of the program, the maximum number of revolutions, the tool number, the cutting speed, the direction of rotation, the feedrate, etc. A secondary function is defined, and the interpolation command part is a cutting condition releasing command in which cutting is performed in earnest. Is part of preparing the code for the user to take advantage of other auxiliary devices such as robots.

1 is a flowchart for creating a machining program. As shown in FIG. 1, a work drawing is first analyzed, a process is analyzed, a tool is determined, a feed trajectory of a tool according to the process analysis is calculated, and a part program is created. Simulate the machining and do the actual machining when there is no abnormality.

Fig. 2 is a block diagram showing the configuration of a conventional numerical controller, which includes a ROM (ROM) 10 for storing a system program as shown therein; A central processing unit (CPU) 11 which reads a system program stored in the ROM 10 through a system bus and controls the numerical controller as a whole according to the logic of the program; A memory 12 for storing a set machining program; Input device composed of a display device and a key input device for input / output such as inputting information necessary for the numerical controller through the key input device and viewing various information necessary for the user through the display device (CRT / MDI, 13); A servo mechanism 15 that is responsible for the rotation and linear motion of the machine; A festive control unit (14) which receives a movement command or a rotation command signal from the CPU 11 and converts the command signal into a signal for starting the servo mechanism 15; After receiving input signals from various external devices such as switches, operation panel switches, and various external driving devices, and performing operations according to the flow control program of the numerical controller, the controller transmits the input signals to the central processing unit (CPU) 11, A PLC (PLC) 16 which receives an output signal for an external device from the CPU 11 and transmits a signal to the corresponding device; It is possible to receive a machining program between the numerical controller and an external device, and it is composed of digital input / output units (17, 18) for receiving a command from an upper system managing the numerical controller and transmitting the result. When a user inputs through this input device (CRT / MDI) 13, it is stored in the memory 12, and at the time of execution, the central processing unit (CPU) 11 processes the data in the programmed order of the ROM 10. To send the result through an output device such as an axis control unit 14, PLC 16, or the like.

3 is a process diagram of a conventional closed polygonal shape. As shown in FIG. 3, the user must calculate the internal paths 1 to 13 by using a cam or a calculation, and the calculated result is made in a program form. Entered into the controller, the numerical controller is programmed in the ROM (10) to correct the machining path created by the Shendy line of the tool for the user's convenience when writing the program to the path of the actual tool (tool diameter, tool length compensation) The program is interpreted sequentially through an analysis program to generate interpolation information for machining and output to the interpolator.

As a result, the size of the program for polygon processing and the analysis time of the analyzer are proportional to the number of internal paths of the polygon.

As described above, in the conventional technology, it is difficult to know what shape the created program processes, as well as various calculations such as tool position in order to create the program, and it is difficult to understand the program when modifying the created program later. There was a problem that required a lot of time and effort.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a method of internally simplifying a machining program for a complex closed polygon using a new G-code.

1 is a flowchart for creating a machining program;

Figure 2 is a block diagram showing the configuration of a conventional numerical controller.

Figure 3 is a processing diagram of a conventional closed polygonal shape.

4 is a process flow diagram in a syntax analysis program according to the present invention;

* Description of the symbols for the main parts of the drawings *

10: ROM 11: Central Processing Unit

12: memory 13: input device (CRT / MDI)

14 Festival Fisherman 15 Servo Mechanism

16: PLC 17,18: Digital input / output

The configuration of the present invention for achieving the above object is a ROM (ROM) 10 for storing a system program as shown in Figure 2; A central processing unit (CPU) 11 which reads a system program stored in the ROM 10 through a system bus and controls the numerical controller as a whole according to the logic of the program; A memory 12 for storing a set machining program; Input device composed of a display device and a key input device for input / output such as inputting information necessary for the numerical controller through the key input device and viewing various information necessary for the user through the display device (CRT / MDI, 13); A servo mechanism 15 that is responsible for the rotation and linear motion of the machine; A festive control unit (14) which receives a movement command or a rotation command signal from the CPU 11 and converts the command signal into a signal for starting the servo mechanism 15; After receiving input signals from various external devices such as switches, operation panel switches, and various external driving devices, and performing operations according to the flow control program of the numerical controller, the controller transmits the input signals to the central processing unit (CPU) 11, A PLC (PLC) 16 which receives an output signal for an external device from the CPU 11 and transmits a signal to the corresponding device; It is possible to receive a machining program between the numerical controller and an external device, and to receive a command from an upper system managing the numerical controller, and to configure the digital input / output units 17 and 18 for transmitting the result.

The method includes: a first step of defining and inputting a predetermined number of polygonal contour data; A second step of recognizing a G-code corresponding to the polygonal contour data input in the first step; A third step of generating an internal path by the G-code recognized in the second step; A fourth step of determining a progress path based on the contour data input in the first step; And a fifth step of performing the machining operation according to the progress path determined in the fourth step.

4 is a flowchart of a syntax analysis program according to the present invention. As shown therein, a program file is opened and read in block (line) units to interpret syntax, and whether a G-code corresponding to contour data is input. If the input is judged, the operation to generate the internal path is performed to convert the data into intermediate data to determine whether the file is finished and continue or continue until the end of the file.

As described above, the G-code extension method of the numerical controller of the present invention has the effect of improving the efficiency of the numerical controller by eliminating errors in the part program creation by defining contour data before creating the part program.

Claims (1)

A first step of defining and inputting a predetermined number of polygonal contour data; A second step of recognizing a G-code corresponding to the polygonal contour data input in the first step; A third step of generating an internal path by the G-code recognized in the second step; A fourth step of determining a progress path based on the contour data input in the first step; And a fifth step of performing a machining operation according to the progress path determined in the fourth step.