JP2707031B2 - Method and apparatus for checking machining program - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for checking a machining program of a numerical controller used for controlling an electric discharge machine and the like, and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, for example, a method of checking a machining program of an electric discharge machine includes a dry run method for operating an actual machine and a graphic check method operated on a screen of a numerical controller (hereinafter referred to as NC).
There are types.

FIG. 3 is a block diagram showing the structure of a conventional electric discharge machine of this type. In the figure, 1 is NC, 10
Is a CPU in the NC 1, 11 is a memory for storing system programs and user programs, 12 is a display interface, and 13 is a display interface 12
CRT, 14 is a keyboard interface, 15 is a setting panel and a keyboard connected to the keyboard interface 14, 16 is a servo interface, 17 is a servo amplifier connected to the servo interface 16, 18 is a contact interface,
Reference numeral 19 denotes an input / output interface connected to input devices such as FLD and RS-232C. 2 is servo amplifier 1
7 is a servomotor driven. Reference numeral 3 denotes a machine body and a power supply, which are controlled via a contact interface 18. Reference numeral 4 denotes an input / output device such as an FLD or an RS-232C, and input / output signals are transmitted / received via an input / output interface 19.

Next, a description will be given of a check operation of a machining program. First, a dry run check operation will be described. The dry run is to execute a command of a machining program without turning on a machining power supply and check a movement. When a dry run is designated from the setting panel or the keyboard 15 and the machining program is started, other commands are executed only when the machining power-on command is not issued from the contact interface 18. The operator who checks the machine determines whether or not the machining program is intended by looking at the movement of the machine.

Next, the operation of the graphic check will be described. Graphic check is C without moving the machine
This simulates the movement of the machine on the RT screen. When a graphic check is designated from the setting panel or the keyboard 15 and the check of the machining program is started, no command is issued from the servo interface 16 and the contact interface 18, and the movement locus of the machine is displayed on the CRT 13 via the display interface 12. Is drawn. The worker who checks is determined by looking at the drawn shape whether or not the processing program is intended.

[0006]

Problems to be Solved by the Invention Since the conventional checking of the machining program has been performed as described above, there are the following problems. When checking the machining program by dry run, if the setting of the electrode and the workpiece has already been completed and the positioning has been completed because the movement is faithful to the machining program, check the program. It is necessary to remove the electrode or the workpiece once, or to change the coordinate position. In a machining program having automatic positioning based on contact detection, it is necessary to perform an operation for forcibly detecting contact. Further, when a graphic check is performed, the movement of the axis can be checked, but the interference between the electrode and the holding metal fitting of the workpiece cannot be checked at all, and only the shape trajectory is checked.

The present invention has been made to solve such a problem, and appropriately designates either a check method of actually moving a machine or a check method of performing a machine without actually moving the machine. For example, the former check method can be used to check, for example, the processing pitch or interference between the electrode and the holding metal of the workpiece, and the latter check method can be used to check the shape trajectory and the movement of the electrode in the depth direction. It is an object of the present invention to provide a machining program check method and an apparatus therefor.

[0008]

A method for checking a machining program according to the present invention comprises a program code for checking a machining program by moving a machine and a program code for checking a machining program without moving the machine. Individually specify and register, sequentially read out each block of the machining program, determine which program code corresponds to it, and if it corresponds to the program to move and check the machine, execute the machining program to execute the machine program. Is moved to perform a dry run, and if the program corresponds to a program for checking without moving the machine, the machining program is executed. However, without moving the machine, the moving locus is drawn and a graphic check is performed.

In the machining program checking device according to the present invention, a program code for checking a machining program by moving a machine and a program code for checking a machining program without moving a machine are individually designated and stored. Switching condition storage means, processing program analysis means for reading and analyzing the processing program block by block, and which of the program codes stored in the switching condition storage means the processing program analyzed by the processing program analysis unit And outputs a first check signal if the program corresponds to a program for checking a machining program by moving the machine, and outputs a second check signal if the program corresponds to a program for checking a machining program without moving the machine. Switching determination means for outputting,
When the first check signal is input, the corresponding machining program is executed to move the machine to perform a dry run, and when the second check signal is input, the corresponding machining program is executed. A machining program execution unit for drawing a movement locus of the machine and performing a graphic check without moving the machine.

[0010]

In the present invention, for a machining that cannot be checked without actually moving the machine, a program code for checking the machining program by moving the machine is registered, and the machine cannot be moved for the check. For processing of a part or a part that is difficult to check even when the machine is moved, a program code to be checked without moving the machine is registered. Therefore, when each block of the machining program is sequentially read, it is determined which program code the program corresponds to, and if the program corresponds to a program to be moved and checked, the machine is moved by executing the machining program. If the program is a program that allows the operator to perform a dry run, check the trajectory of the machine, check it without moving the machine, execute the machining program but move the machine without moving the machine. To make a graphic check. In this way, the two checking methods are automatically switched.

[0011]

FIG. 1 is a block diagram showing the configuration of a checking device for a machining program of an electric discharge machine according to an embodiment of the present invention. In FIG. 1, reference numeral 20 denotes a machining program analysis unit;
Reference numeral 1 denotes a check means switching determination unit, 22 denotes a check condition switching condition registration unit, 23 denotes a check condition switching condition storage unit, and 24 denotes a machining program execution unit. The components indicated by reference numerals 20 to 24 are realized by the CPU 10 and the memory 11 in FIG.

Next, the operation will be described. By operating the setting panel or the keyboard 15 shown in FIG. 3, the switching condition is input to the check device of the machining program. The switching condition of the checking device of the machining program is a criterion for determining which code in the machining program is to be executed in the dry run or in the graphic check. In the present embodiment, the code to be executed in the dry run is set to
0), origin return command (G28), automatic end face positioning (G29), automatic hole center positioning (G30), automatic pillar center positioning (G31), multiple coordinate system (G53, G54-
G59), M command for turning on / off (M84, M85)
, Except for the M command, the machining condition switching command, and the electrode replacement command. Also, the code to be used in the graphic check is defined as a linear interpolation command (G1), a circular interpolation (G2,
G3), servo mode (G10, G11, G12), jump direction (G13), swing processing (G26, G23), and offset command (G40, G41, G42). Other codes are conditioned on either dry run or graphic check codes.

These input conditions are analyzed by the switching condition registration means 22 and are stored in the switching condition storage unit 23. When the checking of the machining program according to the present embodiment is started, the machining program analysis unit 20 sequentially reads the machining programs from the memory 11 of FIG. 3 one block at a time and analyzes it. Then, the checking means switching determination unit 21 determines whether the condition is a dry run condition or a graphic check condition from the conditions stored in the switching condition storage unit 23 and the analysis result of the machining program for each block. For example, the dry run signal 25 is turned on. If the condition is a graphic check, the graphic check signal 26 is turned on. If neither condition is satisfied, the dry run signal 25 is turned on.

The machining program execution unit 24 includes machining program information analyzed by the machining program analysis unit 20 and a dry run signal 25 or a graphic check signal 2.
6 to perform an operation according to the corresponding signal. That is, when the dry run signal 25 is input, the command of the machining program is executed without turning on the machining power, and other commands are executed only when the command for turning on the machining power is not issued from the contact interface 18. The operator who checks the data looks at the movement of the machine and determines whether the machining program is intended. When the graphic check signal 26 is input, the machining program is executed, but no command is issued from the servo interface 16 and the contact interface 18, and the movement locus of the machine is drawn on the CRT 13 via the display interface 12. Is done. The worker who checks is determined whether the machining program is intended by looking at the drawn shape.

FIG. 2 is a flowchart showing the operation of the check means switching determining section 21. The checking means switching determination unit 21 reads a machining program for one block from the machining program analysis unit 20 (S1). And
It is determined whether or not the read program indicates the end of the program (S2). If the program is completed, the process is terminated. If not, the code of one block read is taken out (S3), and the check means switching condition storage. The registered data is extracted from the unit 23 (S4). The checking means switching determination section 21 compares the read one block code with the registered data from the switching condition storage section 23 to determine whether or not they match (S5). It is determined whether there is no more registered data in the switching condition storage unit 23 (S6). If not, the process proceeds to step S9. If not, the process proceeds to step S4 to retrieve further data. repeat.

When the checking means switching determination section 21 determines that the code of one block read and the registered data from the switching condition storage section 23 match (S5), the one block is subjected to graphic check. Then, if the code is a graphic check target, the graphic check signal 25 is turned on (S8). Otherwise, the dry run signal 26 is turned on (S9). And
One block read by the machining program execution unit 24 is executed as described above based on the graphic check signal 25 or the dry run signal 26, and is executed by a graphic check or dry run (S10). When the processing for one block is completed, the checking means switching determination unit 21 repeats the above processing until the processing program ends (S2).

In this embodiment, the dry run mode is used as a check method for actually moving the machine, and the graphic check mode is used as a check method without actually moving the machine. The code to be executed may be based on another expression method. Further, in the method of checking a dry run in which the machine is actually moved, it is necessary to set a mode so that the movement of the electrodes and the like does not become discontinuous on the XY plane. Further, the object of checking the machining program of the present invention is not limited to the electric discharge machining apparatus, but also the machining program of the NC machine tool.

[0018]

As described above, according to the present invention, it is necessary to check the interference of the electrode and the holding member of the workpiece, which cannot be checked unless the machine is actually moved, and to check the processing location. Since it is possible to appropriately switch between checking such as processing depth and automatic positioning that cannot be performed, the checking of the machining program is more accurate and easier to understand than in the past.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration diagram of a machining program check device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of a check means switching determination unit of FIG. 1;

FIG. 3 is a configuration diagram of a conventional electric discharge machining apparatus.

[Explanation of symbols]

 1 NC 2 Servo motor 3 Machine body and power supply 4 Input / output device 10 CPU 11 Memory 12 Display interface 13 CRT 14 Keyboard interface 15 Setting panel and keyboard 16 Servo interface 17 Servo amplifier 18 Contact interface 19 Input / output interface 20 Processing program analysis unit Reference Signs List 21 Checking means switching determination unit 22 Switching condition registration unit 23 Switching condition storage unit 24 Machining program execution unit

Claims (2)

(57) [Claims] A program code for checking a machining program by moving a machine and a program code for checking a machining program without moving the machine are individually designated and registered, and each block of the machining program is registered. Are sequentially read to determine which program code corresponds to, and if the program corresponds to a program to be moved and checked, the machine is moved by executing the machining program to perform a dry run,
If the program checks without involving the movement of the machine, the machining program is executed. However, a method of checking the machining program that draws the movement locus and performs a graphic check without moving the machine. 2. A switching condition storage means in which a program code for checking a machining program by moving a machine and a program code for checking a machining program without moving a machine are individually designated and stored; A machining program analysis means for reading and analyzing one block at a time; and determining which of the program codes stored in the switching condition storage means the machining program analyzed by the machining program analysis unit corresponds to. If the program corresponds to a program for checking a machining program, a first check signal is output. If the program corresponds to a program for checking a machining program without moving the machine, a second check signal is output.
Switching determination means for outputting a check signal, and when the first check signal is input, a corresponding machining program is executed to move the machine to perform a dry run, and the second check signal is input. A machining program executing unit that executes a corresponding machining program when the machine is moved, but draws a movement locus of the machine without moving the machine and performs a graphic check.