JPS63131205A - Processing condition setting device for nc electrical discharge machine - Google Patents

Abstract

PURPOSE:To make a processing efficiency high by selecting a processing progress state detection unit, a processing condition history storage unit and either a processing condition storage unit or the processing condition history unit and reading the processing condition. CONSTITUTION:A processing condition setting device for NC electrical discharge machine is constituted with a processing condition setting unit 1, a CPU 2, the processing progress state detection unit 3 consisting of a position detecting unit 3a and a timer 3b for detecting the processing time, the processing condition storage unit 4 and the processing condition history unit 5. Thus, when the manual alteration and adjustment of an incidental condition is not executed in the midst of the process, the processing condition is read out from the processing condition storage unit 4 according to the selected table of the processing condition code so as to process. When the manual alteration and adjustment is executed, non-alteration part is kept as it is and as for the alteration part, the incidental condition table, in which the processing time, etc., is altered each time, is generated and stored in the history storage unit 5. As a result, as for a similar process the processing condition is set from said unit 5.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to electrical discharge machining, especially when machining is repeated many times under machining conditions similar to pre-stored machining conditions (
The present invention relates to a machining condition setting device for an NC electric discharge machine suitable for so-called multi-piece machining.

[Prior Art] In recent years, machines have been equipped with a machining condition setting unit that sets machining conditions and a machining condition storage unit that stores machining conditions for each type of machining, and the machining conditions that correspond to the desired type of machining are stored from the machining condition storage unit. A machining condition setting device for an NC electric discharge machine that reads data and performs electric discharge machining has been proposed. Even with conventional devices of this type, if you manually change or adjust the machining conditions while machining according to pre-stored machining conditions, the adjusted values can be stored and used for subsequent similar machining. It has been done to me.

[Problems to be Solved by the Invention] However, in the conventional device, only one type of changed and adjusted setting values (machining conditions) can be stored for the same surface roughness condition, and only one type of changed and adjusted setting values (machining conditions) can be stored. In many cases, setting values for specific processing were stored. For example, when machining to a depth of 20++a with one roughness condition,
Processing conditions are not necessarily the same from beginning to end. In general, in order to increase machining efficiency in shallow areas, the non-machining time (time without electrical discharge) used for vertical movement of the electrode (hunting) to remove sludge is shortened, but in deep areas, arcing due to sludge accumulation In order to prevent this from occurring, the non-processing time is often lengthened.

Even when machining is performed under one surface roughness condition, it may be necessary to change the machining conditions little by little as the machining progresses. The set value can be of one type, such as a value at a deep location, or an average value between a shallow location and a deep location. For this reason,
There was a problem in that the processing conditions for fine wood grains were not set in accordance with the progress of processing, and the processing efficiency was significantly reduced, especially when applied to multi-piece machining.

The present invention has been made to solve the above-mentioned problems, and allows satisfactory processing to be performed by setting processing conditions with fine wood grains in accordance with the progress of processing.

It is an object of the present invention to provide a machining condition setting device for an NC electric discharge machine that can be applied to multi-cavity machining and significantly improve machining efficiency.

[Means for Solving the Problems] The present invention includes a processing progress state detection unit, a processing condition history storage unit, and a method for reading processing conditions by selecting either the processing condition storage unit or the processing condition history storage unit. and control means for electrical discharge machining.

[Operation] Every time the machining conditions are manually changed or adjusted, the machining condition history storage unit stores at least the adjustment value and the machining depth and machining time detected by the machining state detection unit at the time of the adjustment. The control means reads out the stored machining conditions in place of the machining conditions stored in the machining condition storage unit for the same machining type according to a command from the machining condition setting unit, and performs electric discharge machining using the machining conditions. As a result, processing conditions with fine wood grains can be set in accordance with the progress of processing, and satisfactory processing can be performed.

[Example] The present invention will be described in detail below with reference to the drawings.

Fig. 1 is a block diagram showing an embodiment of a machining condition setting device for an NC electric discharge machine according to the present invention. In Fig. 2, 1 is a machining condition setting unit, 2 is a CPU, 3 is a position detector 3a and a machining time detection A machining progress detection unit includes a timer 3b, 4 a machining condition storage unit, and 5 a machining condition history unit.

In this case, the machining condition setting unit 1 is for setting machining conditions. Here, it is rough in advance.

The discharge energy was set in advance according to the type of machining (this type is coded as a machining condition code) for various surface roughnesses such as medium and finishing. Other machining conditions other than discharge energy (these are referred to as incidental conditions) are written in the machining condition storage unit 5,
This is to change the machining conditions (manual change adjustment) during machining.

The CPU 2 exchanges data with each unit 1, 3 to 5, and performs various calculations and data processing for setting machining conditions. The machining progress state detection unit 3 constantly detects the machining depth and machining time from the start to the end of machining, and the CPU 2
give to The machining condition storage unit 4 stores discharge energy and incidental conditions for each machining type, in other words, machining condition codes, in advance in a ROM area or in the machining condition setting unit 1.
With the initial settings, the data is written into a table in the RAM area. FIG. 2 shows an example of the table of the above-mentioned incidental condition portion (this is referred to as the incidental condition table). As shown in the figure, in this table, additional conditions such as machining depth along machining progress, machining voltage (discharge average voltage) according to machining time, non-machining time for hunting, and servo speed are set. . The processing condition history memory unit 5 is
Every time the machining conditions (in this case, incidental conditions) are manually changed or adjusted by the machining condition setting unit 1 during machining, at least the adjusted value and the machining depth and machining time detected by the machining progress state detection unit 3 at that time are checked. Remember. Here, the parts that have not been changed are left as they are, and the parts that have been changed are rewritten with the changed values, and a table is stored as shown in FIG. 2. in this case,
For example, an identification code of the change incidental condition table is added to the processing condition code in FIG. 2 in accordance with the change order. In other words, this memory unit 5 subdivides the incidental conditions into various types according to the progress of machining (machining depth, machining time) under the same discharge energy, with respect to the memory unit 4 that stores incidental conditions for each type of machining (discharge energy). This is a storage unit that can be read and selected at will.
(always used in conjunction with the discharge energy setting value).

In the apparatus of the present invention having the above-described structure, if there is no manual change or adjustment of incidental conditions during machining, machining conditions are read out from the machining condition storage unit 4 according to the selected machining condition code table and machining is performed. If there is a manual change or adjustment of incidental conditions during processing, the parts that have not changed will remain as they are, and the parts that have changed will be updated with the machining depth, machining time, and changed machining conditions each time. A supplementary condition table in which the values before the change are rewritten is created and stored in the processing condition history storage unit 5.

By repeating the above operations, the machining condition history storage unit 5 stores various machining conditions (changed incidental conditions) similar to the initial machining conditions.

Therefore, when performing similar machining thereafter, by selecting a desired one of the various incidental condition tables stored in the machining condition history storage unit 5, the machining conditions can be set each time during similar machining. With the unit 1, processing conditions with fine wood grain can be set without manual changes and adjustments as processing progresses.

FIG. 3 shows an example of the process in which a changed incidental condition table (machining condition history table) is created and stored in the machining condition history storage unit 5 when incidental conditions are manually changed or adjusted during machining. FIG. In addition,
The incidental conditions are not written in the machining condition storage unit 4 in advance, but the lights set during the first actual machining are sequentially stored in the machining condition history storage unit 5 as manual change adjustment, and the same as the machining condition history table. It may also be stored in unit 5.

[Effects of the Invention] As described above, according to the present invention, the results of manual changes and adjustments according to the progress of machining during the first and subsequent machining can be reused for the second and subsequent machining. Therefore, processing conditions with fine wood grains can be set in accordance with the progress of processing, and satisfactory processing can be performed.Especially when applied to multi-piece processing, processing efficiency can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the device of the present invention, and FIG.
The figure shows an example of a supplementary condition table. FIG. 3 is a flowchart showing an example of the process of creating and storing a changed incidental condition table (processing condition history table). 1... Processing condition setting unit, 2... CPU, 3...
... machining progress state detection unit, 4... machining condition storage unit, 5... machining condition history storage unit. Patent Applicant Hitachi Seiko Co., Ltd. Agent Patent Attorney Tadashi Akimoto Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] The machine includes a machining condition setting unit for setting machining conditions and a machining condition storage unit that stores machining conditions for each type of machining, and performs electric discharge machining by reading machining conditions according to the desired type of machining from the machining condition storage unit. A machining condition setting device for an NC electric discharge machine includes a machining progress detection unit that detects machining depth and machining time, and a machining condition setting unit that detects at least A machining condition history storage unit that stores the adjustment value and the machining depth and machining time detected by the machining progress state detection unit at that time, and the machining condition setting unit for the same machining type by commands from the machining condition setting unit. A machining condition setting device for an NC electric discharge machine, comprising a control means for performing electrical discharge machining using machining conditions stored in the machining condition history unit instead of machining conditions stored in the storage unit.