JPH01312605A - Electrical discharge machine - Google Patents

Abstract

PURPOSE:To prevent a discharge machining from stopping in the part of an error block even if the error block exists in an NC program by analyzing respective blocks in the NC program and giving the alarm when NC recognizes that the error is included in the analyzed blocks. CONSTITUTION:The discharge machining is started from a start point S in a work W and the machining is executed at a machining point D at present. At the same time as the start of the discharge machining, the side of NC analyzes the NC program at every block and it usually analyzes the block several blocks ahead from the present machining block. Since NC gives the alarm when it recognizes that the error is included in the analyzed block, the NC program can be edited before the block including the error can be executed. Thus, the discharge machining can be prevented from the stopping in the part of the block including the error even if it exists in the NC program.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electrical discharge machine.

[Conventional technology] A conventional electric discharge machine that performs electric discharge machining based on an NC program analyzes each block of the NC program created in advance, and executes each block of the program one by one based on the analyzed machining contents. Electric discharge machining is performed.

[Problem to be solved by the invention] In the above-mentioned conventional electrical discharge machine, if a block in the NC program has a long distance due to a format error, etc., machining is performed up to the block with the mistake, and the distance is removed. Electric discharge machining stops at the block. Therefore, if there is a block with an error, there is a problem that electrical discharge machining cannot be continued thereafter.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electrical discharge machine that can prevent electrical discharge machining from stopping at that part even if a distant block exists in an NC program.

[Means for Solving the Problems] The present invention provides an electrical discharge machine that performs electrical discharge machining based on an NC program, in which each block of the NC program is analyzed, and the NC recognizes that the analyzed block contains an error. Sometimes it is a warning.

Further, the present invention temporarily stops electrical discharge machining when the electric discharge machine attempts to execute the block containing the error without editing the block containing the error after the above warning, and executes the block containing the error. .

After editing the data, the temporary stop is canceled and the electrical discharge machining is restarted.

[Operation] The present invention provides a warning when the NC recognizes that an analyzed block contains an error. Therefore, the NC program can be edited before executing the block containing the error, and therefore the NC program can be edited before executing the block containing the error. Even if there is an incorrect block in the program, electrical discharge machining can be prevented from stopping at that part.

In addition, in the present invention, after the above warning, when the electric discharge machine is about to execute the block containing the error without editing the block containing the error, the electric discharge machining is temporarily stopped, and the block containing the error is After editing, the temporary stop is canceled and the electrical discharge machining is restarted, so even in unmanned machining, there is no need to restart the machining from the beginning, which is efficient.

[Example] FIG. 2 is a block diagram showing one embodiment of the present invention.

This embodiment includes an electrical discharge machine main body 10, a CPU 20,
It has a ROM 30, a RAM 40, a CRT 50, an input switch 60, and a bus 70.

The machine main body 10 is a main body of a wire-cut electric discharge machine. The CPU 20 controls the processing machine main body 10 as well as the entire embodiment shown in FIG. R.O.
M30 is a memory that stores a program that implements operations to be described later, and RAM 40 is a memory that is used as a work memory and also is a memory that stores an NC program. The CRT 50 is an example of a device that displays the status of the electric discharge machine and also displays blocks containing errors as an editing screen. The input switch 60 is used to input information for controlling the electric discharge machine main body 10.

The CPU 20 analyzes each block of the NC program,
N indicates that this parsed block contains an error.
This is an example of a means for issuing a warning when C recognizes the information.

The CPU 20 and the CRT 50 are examples of display means that displays the block containing the above error on the screen.

Furthermore, after the above warning, the CPU 20 does not edit the block containing the above error, and when the electrical discharge machine attempts to execute the block containing the above error, the CPU 20 temporarily stops electrical discharge machining and blocks the block containing the above error. This is an example of means for canceling the temporary stop and restarting electrical discharge machining after editing.

Next, the operation of the above embodiment will be explained.

FIG. 3 is an explanatory diagram of the above embodiment.

In FIG. 3, electrical discharge machining has started from a starting point S in the workpiece W, and machining is currently being performed at the machining point. Then, at the same time as the start of electrical discharge machining, the NC side analyzes the NC program block by block, and usually analyzes blocks several dozen blocks ahead of the current machining block. This point currently being analyzed is indicated by A in FIG.

FIG. 1 is an explanatory diagram of the above embodiment, and shows an example of an NC program.

As shown in Figure 1, machining has been completed from the beginning of the NC program to the block one block before the block D that is currently being machined, and at point A, which is several dozen blocks ahead of the block D that is currently being machined. , NC is analyzing a block of the NC program.

By the way, in Figure 1, in the block under analysis,
rGOOGot XIOYIOJ,! : Suppose there was an order to do so. GOO is a code indicating positioning,
GOl is a code indicating a processing command. The presence of these two instructions in one block is inconsistent and the block is an erroneous block. In this way, if the analyzed block contains an error, the CPU 20 displays a warning on the CRT 50, and also displays information on what kind of error has occurred and the erroneous block on the CRT 50.

At this time, when the user looks at the CRT 50, the block containing the error is displayed on the editing screen, so the user can edit the block containing the error. 0 Electric discharge machining of the error block that should be edited Since there is a considerable amount of time (until electrical discharge machining is performed from point D to point A), sufficient editing can be done.

By the way, even if the user is warned that an error block has occurred as described above, if the user does not edit the NC program, the electrical discharge machine will continue machining until the error block occurs, and the machining will not be completed. When it runs out, processing will be temporarily stopped. In other words, machining is not completely stopped.

In this case, when the user presses the start switch in the input switch 60 after editing the error block, electrical discharge machining is restarted from the edited block.

Conventionally, when an error block is reached, electrical discharge machining is completely stopped, but in the above embodiment, it is temporarily stopped, so that machining can be restarted after editing the error block. . As described above, it is convenient for unmanned machining to be able to restart electric discharge machining using the restart key.

It should be noted that instead of displaying a warning on the CRT 50 when a leek block is analyzed, a warning sound may be generated by a speaker (not shown) or the like.

[Effects of the Invention] According to the present invention, a warning is issued when the NC recognizes that an analyzed block contains an error. This has the effect that electrical discharge machining can be prevented from stopping.

Further, according to the present invention, after the above warning, when the block containing the error is not edited and the electric discharge machine attempts to execute the block containing the above error, the electric discharge machining is temporarily stopped and the above error is fixed. After editing the included block, the temporary stop is canceled and the electrical discharge machining is restarted, so there is no need to restart the machining from the beginning even in unmanned machining, which is effective.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an NC program in the present invention. FIG. 2 is a block diagram showing one embodiment of the present invention. FIG. 3 is an explanatory diagram of the operation of the above embodiment. D... Current processing point, A... Current analysis point, 10... Processing machine body, 20... CPU, 30... ROM, 50... CRT. Patent applicant Sodick Co., Ltd. Agent Arata Yokubo −

Claims (4)

[Claims] (1) An electrical discharge machine that performs electrical discharge machining based on an NC program is characterized by analyzing each block of the NC program and issuing a warning when the NC recognizes that the analyzed block contains an error. electrical discharge machine. (2) The electrical discharge machine according to claim (1), wherein the block containing the error is displayed on the screen. (3) The electric discharge machine according to claim (2), wherein the block including the error can be changed based on the display of the block containing the error. (4) In claim (1), after the warning, the block containing the error is not changed, and when the electrical discharge machine attempts to execute the block containing the error, temporarily stopping the electrical discharge machining, An electrical discharge machine characterized in that after editing the block containing the error, the temporary stop is canceled and electrical discharge machining is restarted.