JPH0798289B2 - Record display method of machining history in electrical discharge machining - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a character or a symbol indicating an abnormality in an electric discharge machining or an abnormality of an NC device which occurs during execution of an NC program, or a corresponding information of the NC device, The present invention relates to a method of recording and displaying a machining history in an NC electric discharge machine in which data such as coordinates and numerical values are recorded in the NC program in a temporary storage device and displayed in correspondence with the NC program.

[Conventional technology]

When performing electrical discharge machining with an electrical discharge machine equipped with an NC device,
Conventionally, an NC program is created in advance and electric discharge machining is performed based on this NC program.

And when unmanned processing is performed, during the processing,
If the wire electrode is broken, an arc occurs, NC
When an abnormal state has been reached, the abnormal state is set by connecting wires, changing the set machining conditions, automatically returning after an arc, or skipping the program according to a predetermined procedure. It corresponds to.

[Problems to be Solved by the Invention]

In the above conventional equipment, when unmanned machining is performed, information about machining abnormality that occurred during machining, information about the countermeasures of NC equipment and information about abnormal state that occurred in NC equipment, and how machining is interrupted or terminated It is difficult to know what was done after the processing.

Therefore, NC such as processing conditions and processing method in the above processing
There is a problem that it is not possible to easily determine whether the program settings are appropriate or not.

INDUSTRIAL APPLICABILITY The present invention makes it possible to easily know the information indicating the processing content, the information on the countermeasures taken by the NC device, and the information indicating the abnormal state occurring in the NC device, and the NC program such as the processing conditions and the processing method at that time. It is an object of the present invention to provide a method of recording and displaying a machining history in electric discharge machining, which can easily determine whether the setting is correct or not.

[Means for solving the problem]

The present invention stores a pre-created NC program in a temporary storage device, drives the electric discharge machine main body based on the NC program, and occurs when the electric discharge machine is operated based on the NC program. Occurrence information of an abnormal state for execution of the NC program, corresponding action information for the abnormal state of occurrence, and coordinate data of a position during operation and execution of the NC program at the time of occurrence of the abnormal state are stored in the temporary storage device, and the temporary storage is performed. When the NC program of the part that has been operated and executed is read from the device and displayed on the display device,
The information and data stored in the temporary storage device during the execution of the NC program are recorded in corresponding portions on the NC program and displayed on the display device together with the NC program. .

[Action]

The present invention stores, together with coordinate data, information indicating the details of machining abnormalities in electrical discharge machining that occurred during the operation of an electric discharge machine, information regarding correspondence performed by an NC device, and information indicating an abnormal state that occurred in the NC device. Since it is displayed together with the NC program in a state recorded in the location corresponding to the NC program, after the unmanned machining by the NC program, it is possible to determine whether the NC program settings such as the machining conditions and the machining method are correct or not. You can do it properly.

〔Example〕

FIG. 2 is a block diagram showing an example of an apparatus for implementing the present invention.

In this embodiment, the electric discharge machine body 10, the CPU 20, the ROM 30
It has a RAM 40, a CRT 50, an input switch 60, and a bus 70.

The electric discharge machine main body 10 is the main body of the wire cut electric discharge machine here. The CPU 20 controls the processing machine main body 10 and also controls the entire embodiment shown in FIG. RO
M30 is a memory that stores various programs that realize the operations described below, and RAM 40 is used as a work memory and also stores a machining history file including the NC program shown in FIG.

The CRT 50 is an example of displaying the state of the electric discharge machine and also displaying the NC program recording the machining history shown in FIG. The input switch 60 is used to specify or set information and data for controlling the electric discharge machine body 10.

It should be noted that the RAM 40 stores information on machining abnormalities, information on abnormal states that have occurred in the NC device, information on countermeasures taken by the NC device, and coordinate data indicating the position where the information has occurred.

Next, an example of the present invention will be described using an example of the above apparatus.

FIG. 3 is a diagram showing an example of an NC program which has been conventionally used.

In this program, G29 is a code indicating the position to return to if the wire breaks. G92 is a code that defines a reference point of coordinates, and numerical data is entered in X, Y, and Z that follow.

G00 is a code for positioning, and X10 after that
Indicates that the work is advanced by 10 mm in the X direction without machining.

G41 is a code indicating that offset is to be performed, and H180 following the code indicates that the offset amount is 180 μm. G01 is a code indicating a linear movement, and in this case, indicates that processing is performed in the X direction by 20 mm. After that, since there are Y10 and X10, it indicates that 10 mm is processed in the Y direction and then 10 mm is processed in the X direction.

G40 is a code for canceling the offset, and in the above case, indicates that the Y axis is returned to 0.
And MO2 is the code that terminates the NC program.

FIG. 1 is a diagram showing an example of an NC program in which a machining history file according to an embodiment of the present invention is recorded. This is based on the NC program shown in FIG. It was created by Then, this processing history file is stored in the RAM 40. The basic form of this machining history file is the NC program shown in Fig. 3. Abnormal conditions in machining such as arcs that occur when machining is actually performed based on this NC program, disconnection recovery and machining conditions. The actions taken by the NC unit, such as changes, abnormalities that occurred in the NC unit, etc., are recorded together with the coordinate position data at corresponding locations on the NC program.

That is, if the electric discharge machine operates according to the NC program and no abnormality occurs during the operation, the displayed machining history file is the same as the NC program initially created. However, if an abnormality or the like occurs during machining, the abnormal state or the like is stored as a machining history file in a location corresponding to the NC program.

In the above embodiment, there is a wire breakage during the processing of 20 mm in the X direction by the GO1 code, and the information about the countermeasure for the breakage recovery and the position data at which the breakage recovery was performed are recorded. Has been done. In other words, X, Y, Z
The coordinate position of each axis of U and V is recorded, and after the disconnection is recovered, a corresponding measure such as changing the machining condition is taken by the control of the NC device in order to prevent the disconnection again. And when changing the processing conditions, refer to "Processing condition change OF
The comment "F" means that the Toff of the processing conditions was changed, and the numerical value "05" that follows it means that the setting stage of Toff was switched to the value of the fifth step, and further "X = ..." Indicates coordinate position data during machining when machining conditions are changed. Then, after that, at the location indicated by "ARC", information indicating that an arc has occurred and the arc occurrence position data are also recorded as "X = ..." Similarly.

Then, after processing 10 mm in the Y direction, while processing 10 mm in the X direction, the Ton of the processing condition was changed at the location indicated by the comment information of "processing condition change ON01" and switched to the value of the first step. Can be recognized, and “X = ...” Indicates the coordinate position data at that time. After that, in the place indicated by the comment of “short”, it is indicated that a gap between poles occurred at the coordinate position “X = ...” that follows the comment, and accordingly, “machining condition change ON 02X It can be recognized that the Ton of the processing condition is changed to the value of the second stage by the NC device at the place indicated by the comment information “= ...”.
The subsequent "SKIP = OFF" means that the skip mode is canceled, and the coordinate position at that time is indicated.

Then, after offset cancellation (G40), wire breakage occurred, and the occurrence position is shown. Here, an abnormality has occurred in the NC control state, the error state and position thereof are recorded, the address where the program stopped (error number) is indicated at the same time, and a comment regarding the above error is also recorded. It should be noted that the abnormality in the NC control state is not the abnormality on the main body of the electric discharge machine, but the abnormality on the NC device side, and is considered to be a momentary blackout, a power supply voltage abnormal decrease, or a runaway.

The machining history file created as described above is saved in RAM40, and after unattended machining, the user can edit the contents of the above file.
Since it can be viewed together with the NC program by CRT50, you can check how it was processed during unmanned processing. In other words, it is possible to easily judge whether the NC program settings such as the machining conditions and machining methods in the above machining are correct or not, and to correct the NC program in the next machining and reset the machining conditions. Can be reflected.

The electric discharge machine body 10 may be a die-sinking electric discharge machine body.

〔The invention's effect〕

According to the present invention, the NC program created in advance is temporarily stored, and the abnormal state occurrence information for the execution of the NC program that occurs when the electric discharge machine is operated based on the NC program and the response to the abnormal occurrence state The treatment information and the coordinate data of the position during execution of the NC program at the time of occurrence of the abnormal state are stored in the temporary storage device, and the NC program of the operation executed portion is read from the temporary storage device and displayed on the display device. When the above-mentioned NC program is operated and executed, the information and data stored in the above-mentioned temporary storage device are recorded on the display device together with the above-mentioned NC program while being recorded in the corresponding location on the above-mentioned NC program. Therefore, after performing unmanned machining by the NC program, whether the establishment of the NC program such as the machining conditions and machining method of the machining etc. is correct or not correct. Identify can easily perform the Te has the effect that can be reflected in the reconfiguration modifications and processing conditions the NC program in the next processing.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an NC program in which a machining history file according to an embodiment of the present invention is recorded. FIG. 2 is a block diagram showing an example of an apparatus for implementing the present invention. FIG. 3 is a diagram showing an example of an NC program which has been conventionally used.

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location G05B 19/4062 19/4065

Claims (1)

[Claims] 1. A method of recording and displaying a machining history of electric discharge machining, which is performed by operating an electric discharge machine according to a command of an NC device based on an NC program created in advance, wherein the NC program is a temporary storage device of the NC device. NC generated when the above electric discharge machine is operated based on the above NC program
Occurrence information of an abnormal state with respect to execution of a program, corresponding action information for the abnormal state of occurrence, and coordinate data of a position during execution of the NC program at the time of occurrence of the abnormal state are stored in the temporary storage device, and the temporary storage device is stored. When the NC program of the executed part is read out and displayed on the display device, the generation information, the corresponding treatment information, and the coordinate data stored in the temporary storage device during the execution of the NC program are the NC program. A method for recording and displaying a machining history of electric discharge machining, characterized in that the NC program is displayed together with the above NC program on a display device in a state of being recorded at the corresponding position above.