JPH05233045A - Work condition generating method - Google Patents

Abstract

PURPOSE:To obtain an appropriate work condition with minimum basic data by generating a work condition in any unstored range as well while using basic data stored in a basic data holding part. CONSTITUTION:When required basic data are arranged in a basic data holding part 5, a work condition generation part 4 prepares the work condition, namely, work condition sequences c1-cm by using basic data d1-dk held in the basic data holding part 5. When any work condition matched to request specification does not exist, a basic data generation part 9 extracts the two kinds of basic data approximated to the request specification, and new basic data dd1-ddj are prepared from these data and dispatched to the work condition generation part 4. Thus, the appropriate work condition can be obtained with minimum basic data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine tool such as an electric discharge machine, and a machining condition generating method when the machine tool is used.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram of the entire electric discharge machine including a machining condition generating device. In the figure, 1 is a machining condition generation device in electric discharge machining, 6 is an electric discharge machining device, 7 is a power supply,
Reference numeral 8 is a numerical control device for driving and controlling the electric discharge machining device 6 according to the machining conditions set by the machining condition generating device 1. In addition, 2 is an input unit for receiving the required specifications from the user, 4
Is a machining condition generation unit that generates machining conditions from the input required specifications, 5 is a basic data holding unit that stores basic data required to generate machining conditions, and 3 is an output unit that outputs the generated machining conditions Is. The basic data holding unit 5 is composed of basic data d1 to dk. Further, each basic data di (1 ≦ i ≦ k) is a peak current, a pulse width, a dwell time,
It is composed of electrical conditions such as polarity, electrode operating conditions, and processing characteristics at that time, that is, surface roughness, processing speed, electrode wear rate, inter-electrode clearance, and the like. Further, the processing condition generation unit 4 records a basic data extraction method and a generation method from the basic data holding unit 5 using the required specifications.

Next, the operation will be described with reference to the flow chart of the conventional processing condition generating apparatus of FIG. The processing condition generating device of the conventional processing machine is configured as described above, and the user can set the processing bottom area a1, the processing depth a2, the electrode reduction amount a3, a1 to the like based on the specifications required for the workpiece. Required specifications up to an and finish surface roughness b1, electrode wear b2, machining time b3
The required specifications such as are input from the input unit 2. Upon receiving the required specifications a1 to an and b1 to b3 from the input unit 2, the machining condition generation unit 4 complies with the required specifications based on these input data and the basic data stored in the basic data holding means 5 in advance. One processing condition, that is, a processing condition sequence c1 to cm is generated and set in the output unit 3. Here, m in the machining condition sequence c1 to cm indicates that m stages are performed, and the process proceeds to rough machining, medium machining and finishing machining while switching the conditions. In addition, processing conditions cj (1 ≤ j
≦ m) consists of electrical conditions such as peak current, pulse width, pause time, polarity, power supply waveform used at each processing stage, electrode operating conditions, and the value that allows the electrode to be placed on the final processing surface (electrode displacement amount). Has been done.

If the appropriate processing conditions cannot be obtained for the desired specifications, data representing "nodata" is set in the output unit 3. Further, the output unit 3 displays the set data on a CRT (not shown) and outputs it to a floppy disk (not shown), a numerical controller 8 and a power supply 7. As a result, machining conditions for electric discharge machining are automatically set. It is not always necessary to switch the processing conditions to several steps, and there are cases where one step, that is, m = 1. The structure of the basic data of the basic data holding unit 5 does not depend on the above example, but may include, for example, data on the electrode feed amount and information on the next condition. Further, the machining conditions suitable for each combination of required specifications are stored in advance in the basic data storage unit 5 as basic data in the format of the processing condition sequence c1 to cm, and the processing condition generation unit combines the input required specifications. There is also a case where the processing condition for is retrieved from the basic data holding unit.

[0005]

Since the conventional machining condition generating device is configured as described above, there is a problem that the density of the generated machining conditions depends on the density of the basic data as the source. there were. For example, when only the data of “2 μm” and “5 μm” exist as the surface roughness of the original basic data, if the user inputs the desired surface roughness of “3 μm”, the result becomes “no data”. In such a case, in reality, even if the user desires the data of 3 μm, either “2 μm” or “5 μm” must be selected. Alternatively, the processing condition generation device automatically makes this selection, and the data is as close as possible, that is, "2 μm".
In some cases, the processing condition result of 5 μm ”is output, but this is not the processing condition that the user really wants. To avoid this, it is sufficient to have as much data as possible, but not to have enormous data. Not only that, it also takes time to search.
The skilled worker can determine the processing condition of "3 μm" by using the processing condition of "2 μm" and the processing condition of "5 μm" based on experience and actual data. Nevertheless, such a consideration has not been taken in the conventional processing condition generation device.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a machining condition generating method for generating the optimum machining condition for the required specification with the minimum basic data. ..

[0007]

A machining condition generating method according to the present invention has a function of interpolating data relating to machining conditions, and one kind of basic data from two or more different kinds of basic data to be generated. , Or one processing condition is obtained from two or more different processing conditions after generation.

[0008]

The machining condition generating method according to the present invention has a function of interpolating data concerning machining conditions,
Since one type of basic data is obtained from two or more different types of basic data that is the source of generation, or one type of processing condition is obtained from two or more different types of processing conditions after generation, it cannot be generated by the conventional method. Appropriate processing conditions can be created even for required specifications that were not met.

[0009]

【Example】

Example 1. An embodiment of the first invention is shown below. FIG. 1 is a configuration diagram of the entire electric discharge machine including a machining condition generation device.
In the figure, 1 is a machining condition generation device in electric discharge machining,
6 is an electric discharge machining device, 7 is a power supply, 8 is a machining condition generation device 1
The numerical control device drives and controls the electric discharge machining device 6 according to the machining conditions set by. Further, 2 is an input unit that receives the required specifications from the user, 4 is a processing condition generation unit that generates the processing conditions from the input required specifications, and 5 is basic data that stores the basic data required to generate the processing conditions. A holding unit, 3 is an output unit that outputs the generated processing conditions, and 9 is a basic data generation unit that generates basic data from the basic data of the basic data holding unit 5. The configuration of the basic data holding unit 5 is the same as that of the conventional device, but 1 μm, 2 μm, 5 μm
It is assumed that there is only basic data when the surface roughness is 8 μm and 11 μm.

Next, the operation will be described with reference to the flowchart of FIG. The user determines the machining bottom area a1, the machining depth a2, and the electrode reduction amount a3 based on the specifications required for the workpiece.
The required specifications such as a1 to an and required specifications such as finished surface roughness b1, electrode wear b2, machining time b3, etc. are input from the input section 2. Here, the finished surface roughness b1 is 3 .mu.m.
The machining condition generation unit 4 describes how to switch machining conditions. For example, it is described in the form of how to reduce the surface roughness to the required specifications. 1 if the required surface roughness is 3 μm
Basic data is selected so that the surface roughness becomes finer in the order of 1 μm → 7 μm → 5 μm → 3 μm. Is described.

When the basic data holding unit 5 has the necessary basic data, the processing condition generating unit 4 uses the basic data d1 to dk held in the basic data holding unit 5 to process the processing condition, that is, the processing condition sequence. c1 to cm are generated. In the above example, it is necessary to combine the basic data having a surface roughness of 11 μm, the basic data of 7 μm, the basic data of 5 μm and the basic data of 3 μm to generate the processing condition. Since there is only the data and the basic data of 5 μm, the basic data generation unit 9 generates the missing basic data, that is, the basic data of 7 μm and the basic data of 3 μm.

The basic data generator 9 describes a processing method for obtaining one type of basic data from two types of basic data. For example, it is programmed as follows. Desired surface roughness R One of basic data suitable for desired required specifications is ddjj, and surface roughness of two basic data close to required specifications is Rkk1, Rkk
2, two basic data close to the required specifications, dkk1
, Dkk2, each peak current is Ip, and pulse width is On,

[0013]

[Equation 1]

Is described. When there is no suitable processing condition in the required specifications, the basic data generation unit 9 extracts at least two types of basic data dkk1 and dkk2 close to the required specifications. For example, basic data for 2 μm and basic data for 5 μm are extracted for a surface roughness of 3 μm. If there is no basic data close to the required specifications required for generating the basic data, the data representing “no data” is set in the output unit 3. Note that the basic data generation unit 9 also defines “close to the required specifications”. For example, taking surface roughness as an example.

[0015]

[Equation 2]

It is described as follows. Note that ab
solution (ii) indicates the absolute value of ii. The basic data generation unit 9 follows the above-described processing method to generate the basic data dkk.
1, the basic data ddjj obtained by processing dkk2 is passed to the processing condition generation unit 4. Similarly, necessary basic data d
Generate d1 to ddl. Required specifications a1 ~ from the input section 2
The machining condition generator 4 which has received an and b1 to b3,
From these input data, the basic data d1 to dk stored in the basic data storage unit 5 in advance, and the basic data dd1 to ddl passed from the basic data generation unit 9, at least one processing condition optimal for the required specifications is determined. Set in the output unit 3. Further, when the appropriate processing conditions cannot be obtained for the desired required specifications, data representing "no data" is set in the output unit 3. Further, the output unit 3 displays the set data on a CRT (not shown) and outputs it to a floppy disk (not shown), a numerical controller 8 and a power supply 7.

Embodiment 2. An embodiment of the second invention is shown below. In the first embodiment, two types of basic data are extracted from the basic data correction unit 5 and used, but FIG.
As shown in the configuration diagram of FIG. 4 and the flow chart of FIG. 4, two types of machining conditions c1 to cm, cc close to the required specifications when the machining condition generation unit 4 is provided with the second machining condition generation unit 10 are generated.
1 to ccm may be generated, and the second processing condition generation means 10 may process the two generated processing conditions to obtain one type of processing conditions ccc1 to cccm.

The basic data in the basic data holding unit 5 is assumed to be the same as that in the first embodiment. The processing condition generation unit 4 uses a processing condition having a difference of 3 μm or less from the required surface roughness when the required surface roughness does not exist. Surface roughness is 2 μm
In that case, the basic data is selected so as to make the surface roughness finer such as 11 μm → 8 μm → 2 μm. If the surface roughness is 5 μm, the basic data is selected so as to make the surface roughness finer such as 11 μm → 8 μm → 5 μm. Is described. In the above case, the basic data required for surface roughness 2 μm is 5
Since the required basic data is μm and is also held in the basic data holding unit 5, two types of processing conditions can be obtained. The second processing condition generating means processes the generated two types of processing conditions to obtain a processing condition of 3 μm. Second
The contents of the processing condition generating means are as follows, for example. The desired surface roughness is R. The final stage of the processing conditions suitable for the desired required specifications is ddjj, and the surface roughness of two processing conditions close to the required specifications is Rkk1, Rkk2.
, Two machining conditions close to the required specifications, dkk1,
dkk2, and the peak current of each final stage is Ip,
If the pulse width is On,

[0019]

[Equation 3]

The processing conditions of the final stage other than Ip and On are dkk
Same as 1. The processing conditions other than the final stage are the same as those for dkk1. Further, in the above embodiment, the data to be processed is limited to two types of basic data and two types of processing conditions, but the number is not limited. Further, the processing contents of the basic data generation unit 9 and the second processing condition generation unit 10 may be described by a mathematical expression, a normal production rule or a fuzzy rule, and the format does not matter.

In the above embodiment, the required specifications a1 to an, b1
Although the example of the surface roughness of b3 to b3 has been shown, the same effect can be obtained as long as one kind of data can be obtained from two or more kinds of data such as the degree of wear and the working depth. Further, in the above-described embodiment, the parameters of the processing conditions for performing the processing are the peak current value and the pulse width, but any parameters of the processing conditions such as a pause time and a jump condition may be used. Further, in the above description, the present invention is used for the die-sinking electric discharge machine, but the present invention is not limited to this, and for example, a machine tool such as a laser beam machine, a beam machine, an electrolytic machine, or an NC lathe. If it is a processing condition generation device that inputs the user's required specifications and generates processing conditions, the same effect as that of the above-described embodiment is obtained.

[0022]

In the machining condition generating method configured as described above, it is possible to generate a machining condition in a range not stored by using the basic data stored in the basic data holding unit. Therefore, there is an effect that an appropriate processing condition can be obtained with the minimum basic data.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

FIG. 3 is a flowchart showing an outline of processing according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing an outline of processing according to the second embodiment of the present invention.

FIG. 5 is a configuration diagram showing a conventional processing condition generation device.

FIG. 6 is a flowchart showing an outline of processing of a conventional processing condition generating device.

[Explanation of symbols]

 1 Machining condition generating device 2 Input part 3 Output part 4 Machining condition generating device 5 Basic data holding part 6 Electric discharge machining device 8 Numerical control device

Claims (1)

[Claims] 1. Basic data extracted in accordance with the required specifications from a basic data holding means which inputs required specifications regarding processing and stores a plurality of basic data corresponding to various required specifications. In the machining condition generating method for generating and outputting the machining condition using, the at least two kinds of basic data are extracted, the extracted at least two kinds of basic data are processed, and the basic data that does not exist in the basic data holding unit is processed. A method for generating a processing condition, which is characterized by generating.