JPH05233044A - Device and system for generating work condition - Google Patents

Abstract

PURPOSE:To generate a work condition equal to that of a worker skilled in a working machine by editing a basic work condition and a work condition generating means by a user. CONSTITUTION:A work condition generation part 4 receiving request specification from an input part 2 prepares one work condition matched to the request specification, namely, an electric condition and a work condition example at least from these input data and work condition data previously stored in a work condition holding means 5. At this time, a generation sequence held in a generation sequence holding means 10 is read by the work condition generation part 4 and based on this sequence, the work condition is generated. When any inputted request specification can not be found in the work condition holding means 4, the work condition generation part 4 prepares any new work condition example by using the work condition example having request specification similar to the inputted one in the generation sequence holding means 10. Contents held in the work condition holding means 5 and the generation sequence holding means 10 can be changed at a knowledge editing part 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention collects and holds machining conditions and machining condition generation procedures in a knowledge storage unit when determining conditions of a machining machine used for mold making and parts machining, and a knowledge editing unit The present invention relates to a processing condition generation device for a processing machine, which is capable of creating a control program by using the know-how of a skilled worker operating a processing machine, and a processing condition generation method used for the device.

[0002]

2. Description of the Related Art FIG. 11 is a block diagram of the entire electric discharge machine including a machining generator. 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 numerical controller for driving and controlling the electric discharge machine 6 according to the machining conditions set by the machining condition generator 1. In addition, 2 is an input unit for receiving the required specifications from the user, 4
Is a machining condition generator for generating machining conditions from the input required specifications, 5 is a machining condition holding means for storing machining condition data necessary for generating the machining conditions, and 3 is an output for outputting the generated machining conditions. It is a department.

The conventional processing condition generating device for a processing machine is constructed as described above, and the user can set the processing bottom area a1, the processing depth a2, and the electrode reduction amount a based on the specifications required for the workpiece.
3 and the like, the required specifications of a1 to a1 and the required specifications such as the finished surface roughness b1, the electrode consumption b2, and the processing time b3 are input from the input unit 2. Required specifications a1 to a1 and b1 to b from the input unit 2
Upon receiving m, the processing condition generation unit 4 complies with the required specifications from the input data and the processing condition data stored in advance in the processing condition holding means 5, and at least 1
One machining condition, that is, electric current condition such as peak current, pulse width, pause time, polarity, power supply waveform, etc. at each machining stage, and machining condition sequence c1 such as a value (electrode displacement amount) that makes the electrode the final machining surface. cn is generated and 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) or the numerical controller 8. As a result, machining conditions for electric discharge machining are automatically set.

[0004]

In the conventional machining condition generating device for a machining machine as described above, only the basic machining condition sequence is stored in the database, so that the optimum conditions for various machining can be obtained. Machining is not always possible, and even if the skilled worker corrects and uses the data after the determination, there is a problem that the working conditions vary depending on the skill level of the skilled worker or the skilled worker itself is insufficient.

Further, since each skilled worker has his or her own processing conditions and know-how based on experience, when a new processing condition generation device or method is given, those unique processing conditions and know-how should be utilized. It is not easy to accept because it cannot be done.

There is also a problem in that, after actually operating the processing machine to perform processing, if the processing result is not desirable, it cannot be corrected and used for future processing.

The present invention has been made in order to solve these problems, and obtains a processing condition generation device for a processing machine which obtains a processing performance equivalent to the processing conditions of an operator who is skilled in the processing machine. It is an object of the present invention to provide a processing condition generation system for a processing machine used in the device.

[0008]

A machining condition generation system according to the invention of claim 1 has means for retaining the know-how of operating skill of a skilled worker as a plurality of machining condition generation procedures, and retains it when generating machining conditions. The processing conditions are generated by using the procedure described above. Further, the basic processing condition holding means holds a plurality of processing condition rows arranged for each data such as the material of the work, the removal volume, and the like, together with the result of processing according to the processing conditions. Also, the above 2
Since the contents held by the one holding unit can be displayed and edited, the generated processing conditions can be made better.

The machining condition generating method according to the second aspect of the present invention is configured to hold the basic machining condition holding means and the user's own machining conditions. As a result, it becomes possible to utilize processing conditions that are particularly effective for specific processing.

A machining condition generating device according to a third aspect of the present invention comprises a knowledge storage unit, a knowledge editing unit, and a machining condition generating unit.
The knowledge storage unit is equipped with a basic machining condition holding means, a user's own machining condition holding means, and a machining condition generation procedure holding means, and extraction generalization that extracts know-how from the user's own machining conditions and outputs general-purpose machining conditions Provide means.

A machining condition generating method according to a fourth aspect of the present invention is configured to first select a plurality of candidate machining condition generating procedures, and then select one of them.

In the machining condition generating method according to the fifth aspect of the present invention, first, a candidate for a plurality of machining condition generating procedures is selected, and when one is selected, an input from the user is obtained, and the input result is also obtained. It is configured to work as expected.

According to a sixth aspect of the present invention, there is provided a machining condition generating device which first selects a candidate for a plurality of machining condition generating procedures, and then selects one of the candidates for the procedure, and also uses the procedure selecting means which is held in advance. It makes a selection, but if it cannot be selected, it receives an input regarding the selection from the user, makes a selection based on the input result, and additionally holds the input from this user as a new selection means. To be done.

[0014]

In the machining condition generating apparatus and the machining condition generating method configured as described above, the machining condition is generated by the machining condition generating unit, and the machining condition is generated according to the machining condition generating procedure held in the knowledge storage unit. Operates to generate a condition.
Further, the knowledge editing section works to display and edit the contents of the knowledge storage section.

The extraction generalization unit extracts the characteristics of the processing machine from the combination of the processing conditions and the processing results according to the processing conditions,
It operates so as to be added to the processing condition holding means.

The procedure selecting unit attempts to eliminate the conflict when a plurality of procedures have conflicts. Further, when the conflict cannot be resolved, it operates so as to require the user to input the processing method, and further takes in this processing method as new know-how.

[0017]

【Example】

Example 1. FIG. 1 shows an embodiment of a machining condition generation device using a machining condition generation method according to the first invention for an electric discharge machine. In the figure, 1 to 8 are exactly the same as the conventional processing condition generating device. Reference numeral 9 is a knowledge storage unit, 10 is a generation procedure holding unit, and 11 is a knowledge editing unit.

In the processing condition generating device for a processing machine configured as described above, processing is performed by the processing machine 6 after the processing conditions and the NC program are generated. As shown in FIG. On the other hand, based on the specifications required for the work piece, the user can finish the surface roughness a1, the work material a2, the electrode material a3, the removal amount a4 per unit time, etc.
Enter the required specifications from a1 to a1 and b1 to bm. Of these, the finished surface roughness a1 and the removal amount a4 per unit time are actual measurement values obtained under the processing conditions, that is, the processing results. Next, the machining condition generation unit 4 which has received the required specifications a1 to al and b1 to bm from the input unit 2 determines the required specifications from these input data and the machining condition data stored in advance in the machining condition holding means 5. At least one compatible machining condition, that is, electrical conditions such as peak current, pulse width, pause time, polarity, used power supply waveform at each machining stage, and machining such as the value that allows the electrode to be brought to the final machining surface (electrode displacement amount). The condition sequences c1 to cn are generated.

At this time, one or a plurality of generation procedures stored in the generation procedure storage means 10 are read by the processing condition generation unit 4, and the processing conditions are generated based on this procedure. FIG. 3 shows an example of the processing condition holding means 5, which is an example in which the required specifications a1 to a1 and b1 to bm and the processing condition sequences c1 to cn are replaced with integer values and held.
a1 is, for example, the roughness of the finished surface (unit: μ), a2 is the work material, 0 is the tool steel SK-3, and 1 is the tool steel S.
KD-11, etc. Machining condition sequences c1 to cn are held for these required specifications, but these c1 to cn are composed of a plurality of electrical conditions, electrode displacements, etc. It shows that the process proceeds to rough machining, medium machining, and finishing machining while switching these conditions n times.

Now, the required specifications a1 to a input by the operator
When l and b1 to bm exist in the processing condition holding means shown in FIG. 3, when they cannot be found, the generation procedure holding means 10 holds that nothing is done. Generation procedure holding means 1 when not found
The processing condition generation unit 4 executes a means for generating a new processing condition sequence by using a processing condition sequence having a required specification similar to the input one for 0. In this embodiment, the means for generating a new machining condition sequence is as follows. First, all of the required specifications a1 to al and b1 to bm that do not match any one are selected. If you can't find it, select all two that don't match. If you still can not find it, increase the number that allows non-matching by one and repeat, but if the number of non-matching increases too much, the degree that the selected condition does not meet the required specifications increases rapidly, so it is appropriate. It is necessary to limit to 3, but 3 is appropriate. Further, if the electrode material or the work material, the processing liquid processing method, etc. do not match, this also does not satisfy the required specifications, and therefore it is necessary to exclude them.

As a result, a final condition string is generated by, for example, taking a weighted average for each element of the selected condition strings. The series of processing procedures are described in the generation procedure holding unit 10.

The knowledge editing unit 11 is constructed so that the contents held by the processing condition holding means 5 and the generation procedure holding means 10 can be displayed on a CRT (not shown) or the like to make changes. There is.

Further, in the present embodiment, the final condition sequence is generated by taking the weighted average of the respective elements of the selected condition sequences, but other means may be used. The same effect can be obtained.

Example 2. In the first embodiment, when the processing condition generation unit 4 generates a new processing condition sequence,
This is newly added to the knowledge storage unit 9 by using the processing condition holding means.
It is also possible to hold the processing condition sequence according to the present embodiment. According to the present embodiment, the processing condition sequence can be generated at high speed when the same required specifications are input again.

Example 3. In the first embodiment, the final condition sequence is generated by taking the weighted average of each element of the selected condition sequences, but it may be configured to generate this by fuzzy inference. It is possible, and in this case, it is possible to obtain a generation means closer to the operator's idea.

Example 4. FIG. 5 shows a third example of the electric discharge machine.
It is explanatory drawing which shows one Example of 4th invention, Comprising:
Reference numeral 11 is exactly the same as the conventional device. Reference numeral 12 is a user processing condition holding means.

The user processing condition holding means 12 operates so that the user uses the knowledge editing section 11 to input and hold a combination of unique processing conditions and processing results. FIG. 6 shows the structure of the user processing condition holding means 12. c1 to cn
Is a processing condition sequence, and d1 to do are processing results.

At this time, the processing condition generating unit 4 operates as in the first embodiment according to an instruction from the user or selects the user processing condition holding means 12, and in the latter case, the user processing condition suitable for the processing to be performed this time. Is selected, the past machining results held at the same time are displayed on a CRT or the like (not shown), and sent to the output unit. In the former case, the operation is exactly the same as in the first embodiment (FIG. 7).

Example 5. FIG. 8 is an explanatory view showing an embodiment of the electric discharge machine of the machining condition generating apparatus of the third invention, and 1 to 12 are exactly the same as the above conventional apparatus.
Reference numeral 13 is an extraction generalization unit.

The operation for generating the processing conditions is exactly the same as that in the fourth embodiment, but the extraction generalization unit 1 is operated by a user's instruction to the input unit 2 or an instruction automatically generated.
3 is activated, information for correcting the basic machining condition is extracted from the user machining conditions held in the user machining condition holding means 12, and the basic machining condition holding means 5 operates so as to be corrected.

For example, in the user machining condition holding means 12 shown in FIG. 6A, the machining condition sequence used for machining is stored in c1 to cn, and the machining result according to the machining condition is stored in d1 to do. It is assumed that the processed surface roughness is stored in d1, and the removal amount per unit time is stored in d2. Normally, the finish surface roughness specified in the die machining drawing is 1.5 μRmax, 3
μRmax, 6μRmax, 12μRmax, 18μR
Although standard numerical values such as max are given, they often deviate from these numerical values in d1 which is the actual processing result. There are two cases, that is, the case where the original surface roughness cannot be obtained by processing under the basic processing conditions, and the case where the processing is performed under the processing conditions other than the basic processing conditions. In the former case, the reason why the standard surface roughness cannot be obtained is the secular change of the machine itself,
Differences in processing fluids are included. By using the processing conditions with a proven track record here, it is possible to absorb these differences and obtain appropriate processing conditions. In the latter case, the basic processing conditions can be enhanced by adding to the basic processing conditions. The extraction generalization unit 13 is configured for such a purpose and operates as follows.

First, the case where the original surface roughness cannot be obtained by processing under the basic processing conditions is shown in FIG. 6 (b).
6A shows a part of FIG. 6A, and it is assumed that this part is a processing condition under which the original surface roughness was not obtained by processing under the basic processing condition. The processing result d1 is the surface roughness,
The extraction generalization unit 13 selects the same processing condition held in the basic processing condition holding means 5 and rewrites the required specification a1.

Next, FIG. 6C shows the case of processing under the processing conditions other than the basic processing conditions.
In this case, it can be seen that the surface roughness is finished to the same value by processing under different processing conditions, but the extraction generalization unit 13
The faster one of these two is added to the basic machining condition holding means 5.

The extraction generalization unit 13 operates as described above, absorbs the secular change of the machine itself and the difference in the processing environment,
Further, there is an effect that the processing conditions can be enhanced every time new processing is repeated.

Example 6. FIG. 9 is a fourth view of the electric discharge machine.
FIG. 1 is an explanatory view showing an embodiment of the present invention, in which 1 to 11 are exactly the same as those in the first embodiment. Reference numeral 14 is a procedure selection unit.

At this time, one or a plurality of generation procedures stored in the generation procedure storage means 10 operates in the same manner as in the first embodiment until the processing condition generation unit 4 reads them. The difference is that a plurality of candidates for one or a plurality of procedures for generating is output.
The plurality of candidates are input to the procedure selection unit 14, and the procedure selection unit 14 operates so as to select a candidate to be given the highest priority in accordance with a predetermined priority order.

Regarding the priority order, the generation procedure holding means 10
Among them, the one held first will be given priority.

Example 7. In the sixth embodiment, the generation procedure holding means 10 is given priority over the one held first, but the same effect can be obtained even if the generation procedure holding means 10 is configured to hold the priority order. Is obtained.

Example 8. FIG. 10 is an explanatory view showing an embodiment of the fifth invention for an electric discharge machine, and 1 to 14 are exactly the same as those of the first embodiment. Reference numeral 15 is a user input for selecting a procedure.

In this embodiment, as in the case of the seventh embodiment, no priority is given to all the procedures stored in the generation procedure storage means 10 in advance, so that the procedure to be prioritized may not be found. It can happen. At this time, the user is configured so as to be able to instruct which procedure should be prioritized, and gives priority to the procedure prioritized at this time.

Example 9. As an example of the fourth invention,
A user input 15 for selecting a procedure in the eighth embodiment is configured to be additionally held in the procedure selecting unit 14. As a result, the added procedure selection procedure will be used to select the magnetic field procedure.

Example 10. The generation procedure described in the above embodiment may be described in the IF ... THEN ... format, in which case it is easy to describe the know-how of a skilled worker.

In the above-mentioned embodiment, the case of using it for the electric discharge machine was described, but it goes without saying that it can also be used for other machining machines.

[0044]

Since the invention of claim 1 is configured as described above, it has an effect that a control program can be created by using the know-how of a skilled worker in operating a processing machine. Especially when applied to a die-sinker EDM machine, the electrodes that are machining tools have a wide variety of currents, so the machining environment changes significantly accordingly, and the die-sinker EDM machine shows an unstable state during machining. Since it requires the intervention of skilled workers, it is very effective. Further, by providing the knowledge editing unit, it is possible to add a processing condition generation procedure of skill effect, and there is an effect that the performance is improved each time the editing is performed.

Further, according to the second aspect of the invention, since it is possible for a skilled worker to easily add the processing conditions uniquely found by the skilled worker, there is an effect that more processing can be optimally dealt with.

According to the third aspect of the present invention, the user can take out generally available processing conditions from the processing condition group independently accumulated by the user, and can cope with more processing. Furthermore, know-how is extracted from the processing conditions unique to the user,
A method of outputting general-purpose processing conditions can be obtained, and there is an effect that the performance is gradually improved.

Further, according to the invention of claim 4, since the method of processing the generation procedure is devised, the generation procedure itself becomes simple. By retaining the simple generation procedure, it is possible to accurately reproduce the know-how of a skilled worker operating a processing machine.

Further, according to the invention of claim 5, although the user intervention is required, the effect that the processing conditions can be continuously generated even if the previously stored generation procedure is inadequate is there.

According to the sixth aspect of the present invention, although the user's intervention is required, even if the pre-stored generation procedure is inadequate, the generation of the machining conditions can be continued. Since the selection procedure input by the user is additionally stored, the performance is improved each time the user makes an input.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of first and second inventions.

FIG. 2 is an explanatory view showing an embodiment of the first and second inventions.

FIG. 3 is an explanatory view showing an embodiment of the first and second inventions.

FIG. 4 is an explanatory diagram of the operation of the first and second embodiments of the invention.

FIG. 5 is an explanatory view showing an embodiment of third and fourth inventions.

FIG. 6 is an explanatory view showing an embodiment of third and fourth inventions.

FIG. 7 is an explanatory diagram of operation of the third and fourth embodiments of the invention.

FIG. 8 is an explanatory view showing an embodiment of fifth and sixth inventions.

FIG. 9 is an explanatory diagram showing an embodiment of the seventh and eighth inventions.

FIG. 10 is an explanatory view showing an embodiment of ninth and tenth inventions.

FIG. 11 is a configuration diagram showing a processing condition generation device of a conventional processing machine.

[Explanation of symbols]

 1 Machining Condition Generating Device 2 Input Unit 3 Output Unit 4 Machining Condition Generating Unit 5 Basic Machining Condition Holding Means 6 Electric Discharge Machining Device 7 Power Supply 8 Numerical Control Device 9 Knowledge Storage Unit 10 Generation Procedure Holding Means 11 Knowledge Editing Unit 12 User Machining Condition Holding Means 13 Extraction generalization unit 14 Procedure selection unit 15 Priority input

Claims (6)

[Claims] 1. In a machining condition generation method for generating a machining condition using a plurality of preliminarily held basic machining conditions and a preliminarily held machining condition generation procedure, the basic machining conditions are machined according to the machining conditions. It has a basic machining condition holding means for holding together with the results and a machining condition generating procedure holding means for holding the machining condition generating means, and the basic machining condition and the machining condition generating means are editable by a user. Machining condition generation method. 2. A basic machining condition holding means for preliminarily holding a plurality of basic machining conditions and a machining record based on the basic machining conditions, a plurality of user machining conditions, and a machining record based on the user machining conditions. Knowledge holding means having a user processing condition holding means for holding, a basic processing condition holding means, and a processing condition generation procedure holding means for holding a procedure for generating a processing condition using the contents of the user processing condition holding means A machining condition generating method characterized in that a machining condition is generated by using the contents of the knowledge holding means, and the basic machining condition, the machining condition generating means, and the user machining condition are editable. 3. A knowledge storage unit, a knowledge editing unit, and a processing condition generation unit, and the knowledge storage unit is provided with basic processing condition holding means, user-specific processing condition holding means, and processing condition generation procedure holding means, and user-specific processing. A processing condition generation device, comprising: an extraction generalization unit that extracts a basic processing condition from a condition by an extraction generalization unit; the basic processing condition is extracted by the extraction generalization unit and stored in a basic processing condition holding unit. 4. In the processing condition generation of a processing machine for generating a processing condition using a processing condition generation procedure stored in advance from among a plurality of basic processing conditions stored in advance, first of all processing condition generation procedures are performed. A machining condition generating method, characterized in that a plurality of candidates for a machining condition generating procedure are selected from the inside, and then one candidate is selected from the plurality of candidates. 5. The machining condition generating method according to claim 4, wherein when selecting one candidate from a plurality of candidates,
A processing condition generation method characterized by performing processing based on user input. 6. A knowledge storage unit, a knowledge editing unit, and a processing condition generation unit. The knowledge storage unit has a basic processing condition holding unit and a processing condition generation procedure holding unit, and a plurality of units stored in advance in the knowledge storage unit. In the processing condition generation method of the processing machine that generates the processing conditions from the basic processing conditions using the processing condition generation procedure stored in advance in the knowledge storage unit, first, all the processing condition generation procedures stored in the knowledge storage unit A plurality of processing condition generation procedure candidates are selected from among the plurality of processing condition generation procedures, and then a procedure selecting unit for selecting one from the plurality of candidates is provided, and the procedure selecting unit selects one candidate from the plurality of candidates. When making a selection, the selection is made in advance according to the selection procedure, and if the selection cannot be made, the selection is made based on the input from the user, and the input result is held as a new selection means. A processing condition generation device characterized by the above.