JPH0446716A - Nc electric discharge machine - Google Patents

Abstract

PURPOSE:To facilitate automatic operation of deep hole machining by storing the process of manual change in machining conditions for display element of machining progress situation in a storage medium, and providing a machining condition control device which performs machining in accordance with the storage content in an NC electric discharge machine. CONSTITUTION:An NC electric discharge machine main body 1 is provided with a machining condition control device 3. The machining condition control device 3 consists of a machining condition change process recording means which stores the process of manual change of machining conditions during machining in a storage medium 4 and an NC unit control means which changes machining conditions automatically by controlling an NC unit 2 in accordance with the storage content of the storage medium 4 or the storage content of the storage medium 4 in which the process of change of machining conditions for the predetermined display element which displays the machining progress situation is set and stored externally in advance. Consequently, the control device 3 is capable of machining by storing the process of manual change during machining in the storage medium 4 together with the display element while changing the machining conditions automatically in accordance with the storage content.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides an NCT 11. This relates to mold processing machines.

[Conventional technology]

The NCMC power applying machine automatically positions the table, sets the machining depth, replaces the electrodes, changes the machining conditions, etc., according to a paper tape or key manual program.

NC electrical discharge machines, especially in NC electrical discharge machining where the machining area changes depending on the progress of deep holes or machining, are machined according to the machining situation during the preset period of one block of the cutting program.
It is necessary to change machining conditions such as machining voltage, machining current, ON time, OFF time, and hunting control.

[Problem to be solved by the invention]

However, in the conventional NC electric discharge machine, the machining conditions for each block of the machine program are set on the program.

Therefore, when performing deep hole machining or machining where the machining area changes as the machining progresses, the operator can calculate the machining time (machining elapsed time), machining depth, etc. while executing one block of the machine program given to the NC device. There was a problem that automatic operation was not possible because the above-mentioned processing conditions had to be changed according to changes in processing conditions such as (processing feed size), amount of retained sludge, and processing shape.

An object of the present invention is to provide an NC electric discharge machine that is capable of automatically changing machining conditions during machining, and that can automatically operate even machining with a large machining feed size in one block machining period, such as deep hole machining. It's about doing.

[Means to solve the problem]

The above purpose is to store the process of manually changing machining conditions for predetermined display elements representing the progress of machining in a storage medium during machining, and when performing the same machining as the above, machining will be performed according to the contents stored in the storage medium. This is achieved by providing a machining state management device that allows machining to be performed while automatically changing conditions.

In addition, a machining state management device is provided which allows machining to be performed while automatically changing machining conditions according to the stored contents of a storage medium in which the process of changing machining conditions for predetermined display elements representing the progress of machining is set and stored externally. This is achieved by providing

[Effect]

The machining state management device stores in a storage medium the process of manually changing machining conditions for predetermined display elements (for example, machining time, machining depth, etc.) representing the machining progress status during machining, and performs the same machining as the above-mentioned machining. When carrying out processing, processing is performed while automatically changing processing conditions according to the contents stored in the storage medium.

Further, the machining state management device externally sets in advance the process of changing the machining conditions for the predetermined display elements.

To perform processing while automatically changing processing conditions according to the stored contents of a storage medium.

According to this, it is possible to automatically change machining conditions during machining, and in particular, machining with a large machining feed size during one block machining period, such as deep hole machining, can also be automatically operated.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the NC electric discharge machine according to the present invention, in which 1 is a machining power supply device 1a, a machining feed device 1
2 is an NC device for controlling the electrical discharge machine main body 1 by NC.

3 is a machining state management device which, while machining one block of the machine program given to the NC unit W2, performs machining while changing machining conditions in accordance with predetermined display elements representing the progress status of the machining. .

This machining state management device 3 includes, for example, a machining condition change process recording means for storing a manual change process of machining conditions during machining in a storage medium 4, and a process according to the storage content of the storage medium 4, or the display element. The process of changing the machining conditions for the process is set and stored externally in advance, and the NC device control means controls the NC device 2 to automatically change the machining conditions according to the stored contents of the storage medium 4.

Therefore, the machining state management device 3 stores the manual change process performed during machining in the storage medium 4 together with the display elements, and when performing the same machining as the above machining, the machining condition management device 3 stores the machining conditions according to the contents stored in the storage medium 4. Processing can be performed while changing automatically.

Further, the machining state management device 3 automatically changes the machining conditions according to the stored contents of the storage medium 4, which stores the process of changing the machining conditions for the machining progress display element set externally in advance for a specific machining process. It is also possible to have the

Here, examples of the display elements include machining time, machining depth, etc. Here, an example of machining time will be described.

Note that W is a workpiece. Further, as the storage medium 4, paper tape 4a, flexible disk (abbreviated as FD)
4b, IC card 4c, etc.

Next, the operation will be explained with reference to FIGS. 2 and 3. First, when performing processing, the operator determines whether or not the processing is the first processing (step 201). If this is the first time machining, put the machining state management device 3 into storage mode (step 202L).If necessary, perform initial settings such as sampling time setting and machining state memorization at the start of machining (step 203), then start machining. (Step 2
04).

The machining state storage device W3 stores machining time (machining elapsed time), machining depth,
Processing conditions (processing voltage, processing current, ON time, OFF time, hunting control, etc.) are stored in the storage medium 4 until the processing is completed (steps 205.207.2
08). Here, the machining conditions at the start of machining are also stored in the storage medium 4.

Additionally, if the operator manually changes the machining conditions during machining, the machining time (elapsed machining time), machining depth, and machining conditions after the change are stored in the memory each time until the machining is completed. 4 (steps 206 to 208).

FIG. 3 shows an example of the format of the machining process table stored in the storage medium 4 at this time.

Next, a case will be described in which the same machining as already performed is to be performed. In this case, the operator sets the machining state management device 3 to the execution mode (step 209) and performs the machining. When the machining state management device 3 is put into the execution mode, it calls up a table (file) containing the machining process (which naturally includes the process of manually changing machining conditions) stored in the storage medium 4. , the machining conditions at the time of machining time 0 are read out, and machining is started (steps 210, 211). At this time, the pointer position in the table is set to 1 (step 212).

When machining is started, the machining state management device 3 constantly measures the machining time and machining depth (step 213), and when the measured value reaches the machining time or machining depth at the pointer position on the table, The machining conditions corresponding to the values are read from the table, and the NC device 2 is controlled to change the machining conditions to the values (steps 214 to 216). At this time, the pointer position in the table is set to a value (here, 2) obtained by adding 1 to the previous value (step 217).

Thereafter, similar operations are repeated until the machining is completed (steps 213 to 218), which eliminates the need to change machining conditions, which was conventionally done by an operator, and enables automatic operation.

In the above-described embodiment, the process of manually changing the machining conditions is stored in the storage medium 4 during machining, that is, the case where the operator manually changes the machining conditions while machining is described. It is not limited to this only. For example, P's relative writes the timing and content (change process) of changing the processing conditions in advance on the storage medium 4 based on the judgment that there is a need to change the processing conditions for a specific processing based on the cannibal program, etc. The machining conditions may be automatically changed by reading and executing them in the machining state management device 3.

Furthermore, in the above embodiment, the explanation was given assuming that the machining conditions were changed within the execution period of one block of the crab program.
Changes in machining conditions made for a plurality of blocks within the entire execution period of the cannibal program may be stored, and machining may be executed using the stored contents.

Furthermore, in the above embodiment, the machining time, machining depth, and machining conditions are stored not only when there is a change in the machining conditions, but also at regular sampling times. This is useful for considering changes in processing conditions. At the time of this examination, the stored contents may be corrected on the storage medium 4, and the corrected contents may be used for processing.

Furthermore, it goes without saying that the storage medium 4 may be a hard disk built into the machining state management device 3. Furthermore,
A drive device (driver) for the storage medium 4 may be provided outside the processing state management device 3.

〔Effect of the invention〕

According to the present invention, the process of manually changing machining conditions for display elements of machining progress is stored in a storage medium during machining, and when performing the same machining as the above machining, the machining conditions are changed according to the contents stored in the storage medium. We have installed a machining condition management device that automatically changes machining conditions, so even for machining with large machining feed dimensions during one bronc machining period, such as deep machining, you only need to manually change machining conditions once. And after that, it has the effect of being able to drive automatically.

Further, the machining state management device may perform machining while automatically changing machining conditions according to the stored contents of a storage medium that stores the process of changing machining conditions for display elements of machining progress that are preset externally. Therefore, by having an expert in machining perform the external settings for changing the machining conditions and storing them in a storage medium, there is also the effect that automatic operation can be performed without the need for the manual machining condition change operation.

Furthermore, if an FD or an IC card is used as the storage medium, it becomes easy to carry and can be used in a plurality of electrical discharge machines installed at different locations.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the NC electrical discharge machine according to the present invention, Fig. 2 is a flowchart for explaining the operation of the above mentioned NC electrical discharge machine, and Fig. 3 is used in the above mentioned NC electrical discharge machine. FIG. 3 is a diagram illustrating an example format of a processing process table stored in a storage medium. 1... Electric discharge machine main body, 1a... Machining power supply device, 1
b... Processing feed device, IC... Electrode, W... Workpiece, 2... NC device, 3... Processing state management device, 4
...Storage medium, 4a...Paper tape, 4b...Flexible disk (FD), 4c...IC card. Patent applicant Hitachi Seiko Co., Ltd. Agent Patent attorney Tadashi Akimoto 1 other person Figure

Claims (1)

[Claims] 1. The process of manually changing machining conditions for a predetermined display element representing the progress of machining is stored in a storage medium during machining, and when the same machining as the above is performed, the storage medium is An NC characterized in that it is equipped with a machining state management device that automatically changes machining conditions according to stored contents and performs machining.
Electric discharge machine. 2. A machining state management device that automatically changes machining conditions and performs machining according to the stored contents of a storage medium in which the process of changing machining conditions for predetermined display elements representing the progress of machining is set and stored externally. An NC electrical discharge machine characterized by comprising: