JPH09155645A - Nc data producing method in wire electric discharge machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce an NC data of a pattern for machining suitable for the purpose of a user in a short time, by producing automatically an NC data in order to carry out a wire electric discharge machining, depending on a set machining pattern, and preset machining configuration and machining condition. SOLUTION: By operating the keyboard and the like of a manual data input device 23 with display while making a CPU 19 for CNC execute a form input program stored in a ROM 17, a work such as producing a machining form by the interactive operation with a display screen can be carried out. The produced machining form is stored in an RAM 18. In the ROM 17, a function to produce the NC data in order to carry out the wire electric discharge machining depending on the preset machining form and the machining condition is stored as an application program of each basic operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of NC data creating method in a wire electric discharge machine.

[0002]

2. Description of the Related Art A wire electric discharge machine, an automatic programming device, etc., which automatically creates NC data for wire electric discharge machining based on a preset machining shape and machining conditions are already known.

The basic operations of the wire electric discharge machine are: an approach operation for sending a wire electrode from an approach start point (machining start hole) to an approach point; a contour machining operation for performing contour machining of a machining shape; There is an escape operation for retracting the wire electrode from the escape start point to the escape point, but in the conventional wire electric discharge machine and automatic programming device, the execution order of these basic operations is fixed in advance in software. It was registered in and the execution order could not be changed by the user.

In addition, it is not possible to incorporate another basic operation in the execution order of the predetermined basic operation or to omit a part of the basic operation registered in the execution order. It was not possible to create a combination of basic motions to create an original machining program according to the circumstances and re-register it.

Automatic programming for calling up a machining shape a plurality of times according to a set number of times of machining, for example, roughing, semi-finishing, presence or absence of finishing, and creating NC data for contour machining of the machining shape a plurality of times. Although the function has already been proposed by the present applicants, this also merely executes a specific basic operation repeatedly in a predetermined basic operation execution order, and changes the basic operation execution order. Or, there is no function to select basic actions as necessary.

The execution order of the basic operations fixedly registered in the software is set by the manufacturer in consideration of the accumulation of sufficient experience and the opinions of the user, and is created in accordance with this. You can always achieve above-average results simply by performing the machining according to the machining program, but from the viewpoint of experienced users, the fact that the execution order of basic operations is uniquely decided is a stumbling block. , I'm still dissatisfied with the fact that I can't get above average results.

In such a case, on the user side,
Although there is no choice but to assemble the primitive machining program by completely manual operation, ignoring the automatic creation function of the machining program, it is a waste of time to perform routine routine work manually.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide NC in a wire electric discharge machine capable of creating NC data of a machining pattern suitable for a user's purpose in a short time. It is to provide a method for creating data.

[0009]

According to the present invention, the operation required for wire electric discharge machining is divided for each basic operation, each basic operation item is prepared in advance, and the execution order of the basic operation item is arbitrary. And a machining pattern is set, and NC data for performing wire electric discharge machining is automatically created based on the set machining pattern and preset machining shape and machining conditions. Achieved the purpose.

Further, storage means for storing the set machining pattern is provided, and in accordance with the stored machining pattern,
By automatically creating a series of NC data required for wire electric discharge machining based on preset machining shapes and machining conditions, it has similar machining characteristics even when machining shapes differ. For the processing target,
The basic operation combinations used previously can now be applied as they are.

Further, by inserting, adding or adding another basic operation item to the processing pattern stored in the storage means, the combination of the basic operations previously used can be used as a platform for a simple operation. Enabled to improve the program.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a wire electric discharge machine and its control device. The main body of the wire electric discharge machine includes a bed 1, a column 2, a column 3, an arm 4, a cross table 5, a machining tank 6 and the like, and a controller 1
The cross table 5 is moved in the XY plane by the X-axis driving servo motor Mx and the Y-axis driving servo motor My, which are driven and controlled by the servo control circuits 12 and 13 by 1. There is.

Further, in the body of the wire electric discharge machine, a machining liquid circulator for supplying the machining liquid to the jet nozzle of the column 3 and the machining tank 6, various motors for feeding the wire, and the wire electrode 7 are provided. Is provided with an electric discharge machining power source for applying a machining voltage to the machining liquid control circuit 1
4, the drive control is performed by the control device 11 via the wire control circuit 15 and the discharge control circuit 16.

The control unit 11 is provided with a CNC CPU 19 for driving and controlling each axis of the electric discharge machine based on a system program stored in the ROM 17, a machining program stored in the RAM 18, etc., and a bus 20 is provided. The above-mentioned servo control circuits 12 and 13 are connected via
The C CPU 19 outputs a distribution pulse to the servo control circuits 12 and 13 for each axis based on the machining program.

The PMC CPU 21 drives and controls the discharge control circuit 16, the wire control circuit 15 and the machining liquid control circuit 14 in accordance with the system program stored in the ROM 17 and the power supply conditions and machining conditions stored in the RAM 18.

The CNC CPU 19 has a display control circuit 22.
A manual data input device 23 with a display is connected via the device, so that a machining program can be input, a power source condition and a machining condition can be inputted, and the like.
A display screen of the manual data input device with a display 23 allows a monitor display of machining routes and setting conditions and selection of menu items.

Further, by operating the keyboard or the like of the manual data input device 23 with a display while causing the CPU 19 for CNC to execute the shape input program stored in the ROM 17, the machining shape is created by the interactive operation with the display screen. You can also work. The created machining shape is stored in the RAM 18.

Further, the ROM 17 stores a function for creating NC data for wire electric discharge machining based on a preset machining shape and machining conditions as an application program for each basic operation.

The basic operation mentioned here includes, for example, (1) preparation for machining, (2) discharge on, (3) approach operation, (4) contour forward machining operation, (5) contour reverse machining operation, 6) Escape operation, (7) Move to approach start point, (8) Uncut portion cutting operation, (9) Wire cutting, (10) Wire connection, (11) Discharge off, (12) Machining end, etc. . Hereinafter, each of the basic operations will be briefly described.

First, the preparation for machining (1) is to start the supply of electric power to the electric discharge machining power source and the start of wire feeding, as well as the driving of the machining fluid circulator and the driving of the tension motor for applying tension to the wire. It is a preparation operation including a start operation.

Further, (2) discharge on is the start of drive control of the electric discharge machining power source by the discharge circuit 16.

The approach motion (3) is a machining movement motion from the approach start point to the approach point. For example,
In the example of FIG. 6 (a), this is the machining movement operation from the approach start point a to the approach point b, that is, the operation shown in (3). The approach start point a and the approach point b are input when creating the machining shape data and are stored in the RAM 18 together with the machining shape data.

Further, when the current position of the wire is not on the approach starting point, a moving operation from the current position to the approach starting point is required before the approaching operation. This movement to the approach starting point is the movement to the approach starting point in (7). In the example of FIG. 4B, the case where the current position of the wire is on the point e is shown as an example to show the movement to the approach start point by the operation shown in FIG.

The contour forward machining operation of (4) is a machining movement operation that makes a round in the counterclockwise direction (or clockwise direction) from the approach point along the contour of the machined shape, in order to move the wire along this path. The NC data of (4) is automatically created by the CNC CPU 19 reading the data of the machining shape by activating the application program for the contour forward machining operation of (4). However, this is the case of machining without a cut-out portion.

Further, the contour reverse direction machining operation of (5) is a machining movement operation which makes one round along the machining shape in the forward direction and the reverse direction, and NC for moving the wire along this path.
The data is stored in the CPU 1 for CNC by activating the application program for the reverse contour machining operation in (5).
9 reads the data of the processed shape and automatically creates it.
However, as in the case of the above, it is the case of the processing without the uncut portion.

On the other hand, in the case of machining having an uncut portion as shown in the example of FIG. 6, the escape start point d and the escape point e are set in advance on the contour of the machined shape at the stage of shape forming work.
The uncut portion is the section between points b and d. In the case of machining with an uncut portion, point b is automatically selected as the approach point when the contour forward machining operation in (4) is selected, and the escape start point d from the approach point b along the contour of the machining shape. N of the machining movement operation that goes round counterclockwise until
The C data is automatically created by the CNC CPU 19 in the same manner as described above (route (4) shown in FIG. 4C).

Further, when the contour reverse machining operation of (5) is selected in the machining having the uncut portion, the point d is automatically selected as the approach point, and the point along the contour of the machining shape is selected.
NC of machining movement operation that makes one round clockwise from d to point b
Data is automatically created by the CNC CPU 19 (route (5) shown in FIG. 6D).

Therefore, the points a and b, and the points e and b are
Each is set as a set, and when the approach movement command is input, if the wire position is the position of point a, approach the position of point b, and if the position of point e, approach the position of point d. Automatically create NC data for operation.

The escape operation (6) is a machining movement operation from the escape start point to the escape point. In the case of machining having an uncut portion, a clearance starting point and a clearance point are set in advance on the contour of the machined shape at the stage of shape creation work. This is similar to setting the approach start point for the approach point. For example, if the contour forward machining operation is performed in the example shown in FIG. 4A, the machining movement operation from the escape start point d to the escape point e, that is, the operation shown in (6) corresponds to the escape operation. However, this escape operation is not always the movement from the point d to the point e, and when the contour machining operation performed immediately before that is the contour reverse direction machining operation, the point in FIG. The movement from b to point a is the escape movement. That is, the machining movement to the approach start point or the escape point set corresponding to the current wire position (the machining end point of the contour machining operation performed immediately before) is a substantial escape operation.

Further, the uncut portion cutting operation of (8) is a processing movement operation for finally cutting the uncut portion in the case of processing with the uncut portion, and is shown in FIG. In the example shown, it corresponds to the operation shown in (8). In this example, the linear machining movement operation from point b to point d is performed, but from point d to point d
It may be a linear machining movement operation to b. Since the end point of the approach operation selected before the uncut portion cutting operation is either the approach point b or the escape start point d in any case, the CNC CPU 19 uses the end point data of the immediately preceding approach operation as a basis. , The other point b or d different from this end point, that is, the end point data is point b
If it is, point d is selected, and if the end point data is point d, point b is selected as the target position, and NC data for the machining movement operation required to move to this target position is automatically selected. To create.

The wire cutting of (9) is a process for automatically cutting the wire to eliminate the interference between the wire and the work, and to move the wire to the next processing position.

In the wire connection of (10), the wire cut in the wire cutting process is fed again to penetrate the work,
This is a process for restarting the wire electric discharge machining at a new machining position.

Discharge off in (11) is the end of the drive control of the electric discharge machining power supply by the discharge circuit 16.

In addition, the end of machining in (12) is to stop the supply of electric power to the electric discharge machining power source and the wire feed, and also to stop the machining fluid circulator and stop the driving of the tension motor for applying tension to the wire. Processing.

Next, the processing operation by the operator and the CPU 19 for the CNC will be described by taking as an example the case where the contour forward direction machining operation is performed twice for the machined shape as shown in FIG. It is assumed that the machining conditions and the machining shape have already been created by the creation operation of the machining shape using the shape input program and stored in the RAM 18.

First, the operator operates the manual data input device with a display 23 to select the menu item "creation pattern creation" to start the "machining pattern creation process" by the CPU 19 for CNC, and then the manual data with a display is displayed. A setting screen as shown in FIG. 3 is displayed on the screen of the input device 23. At this stage, the selection item display area 26 is blank, and the basic operation display area 25 is described above.
The basic operation items (1) to (12) are displayed, and the RA is selected in the machining shape display area 27 by the operator.
The machining shape read from M18 is displayed.

After that, the CNC CPU 19 enters a standby state waiting for a basic operation item selection operation, and each time the operator selects a basic operation item from the basic operation display area 25, the name of the selected basic operation is sequentially displayed from the top. It is displayed in the selection item display area 26. The CPU 19 for CNC sequentially stores the selected basic operation item and the selection order thereof in the RAM 18. To select an item from the basic operation display area 25, use the cursor movement keys to move the cursor to perform a pick operation, or select a value (1) to (12) corresponding to the item.
Can be performed by inputting a numerical value from the ten keys.

The selection of items and the setting of the execution order (the selection order of items) are all left to the operator. However, if the settings are incorrect, the selection items once displayed in the selection item display area 26 are deleted. It is also possible to delete with a key to delete the memory from the corresponding area of the RAM 18, or to operate the insert key to insert another operation item in the middle of the operation sequence and additionally store this in the RAM 18. Of course, a series of selection information displayed in the selection item display area 26 can be collectively deleted by specifying the range, or can be moved or copied collectively by specifying the range and inserted in the middle of the operation sequence. For example, in the example of FIG. 3, the third line (
(3) Approach operation) -The information from the 8th line ((10) wire connection) and the information from the 9th line to the 14th line are the same, so the 9th line to the 14th line It is not necessary to purposely perform the input operation up to the selection operation with the cursor or the ten-key pad, and it is sufficient to specify the range from the third line to the eighth line and copy. The CNC CPU 19 sequentially detects these operations and sorts the data in the RAM 18.

Finally, when the operator finishes setting the basic operation items and operates the confirm key, the data in the RAM 18 is confirmed.

At this stage, a message asking whether registration is necessary or not is displayed, so the operator selects either execution of registration or omission of registration and operates the Y key or N key of the keyboard to operate the CNC. The CPU 19 is made to recognize the selection result. When the execution of registration is selected, a message asking for the registration name is displayed again, so the operator can use the keyboard to enter the "processing pattern" (processing type).
An appropriate registered name relating to, for example, "contour multiple times (only in the forward direction)" or the like is input from the nature of the processing in the example of FIG. In response to this, the CNC CPU 19 stores in the non-volatile memory 24 the information finally displayed in the selection item display area 26, that is, the selection status of the items and the setting status of the execution order in association with the registered name. As a matter of course, when the omission is selected, the above-mentioned name registration processing is canceled.

Then, a message asking whether NC data creation is necessary or not is again displayed on the screen, and the operator selects either execution or omission of creation. If the omitted one is selected here, only the execution sequence (processing pattern) of the basic operation and its name can be registered.

A plurality of execution orders of basic operations and their names can be registered in the non-volatile memory 24. The execution order of basic operations once registered can be changed by operating the manual data input device with display 23. It can be called again by selecting the item of "machining pattern list", displaying the selection screen as shown in FIG. 5, and designating the registered name or number (the number corresponding to the registered name). The display status when this operation is performed is basically the same as the example of FIG. 3, but the execution order of basic operations corresponding to the selected name is displayed in the selection item display area 26 from the beginning.
When the machining shape selecting operation is executed together with the calling operation (however, the machining shape is stored in advance in the RAM 18 only), the machining shape selected by the operator is displayed in the machining shape display area 27. .

That is, it is not always necessary to consider the execution sequence (machining pattern) of the basic operation each time a new machining shape is designed, and the machining shape set for the machining shape having similar characteristics to the machining shape designed this time is set. If a pattern has already been registered, NC data can be automatically created by simply selecting the machining shape for which NC data is to be created and the name of the machining pattern to be applied to this machining shape. Is.

In such a case, after the screen as shown in FIG. 3 is displayed, it is not necessary to create NC data after operating the enter key immediately without modifying the data and selecting the omission of registration. If the answer is "Create execution" for the message, the NC data creation process shown below is automatically started.

The NC data creation process is the same whether the execution order of the basic operations is newly set or the execution order of the already registered basic operations is called by the registered name. Is. Here, the NC data creation process will be described with reference to the example of FIG.

If creation of NC data is requested, CN
The C CPU 19 activates the NC data conversion program, first determines the type of the basic operation stored in the first machining sequence, and creates the NC data for this basic operation. In the case of Fig. 3, preparation for machining in (1), namely, the start of power supply to the electric discharge machining power supply and the start of wire feed, the start of the machining fluid circulator and the tension motor for applying tension to the wire. This is a drive start command. This command corresponds to the machining shape and NC of RAM18.
It is stored in the data storage area.

Next is (2) the discharge on, that is, the start command of the drive control of the electric discharge machining power source by the discharge circuit 16, so that this start command is next to the drive command in the RAM.
It will be stored in 18 NC data storage areas.

The next is the approach operation of (3). In this case, whether the position of the wire is the position of the approach start point a,
It is determined whether the position is the escape point e. Since the position is the approach start point a of the machining start hole, the CNC CPU 19 sets the point.
b is automatically selected as the approach point, and the NC program for the machining movement operation from the approach start point a to the approach point b is created by the conversion program that converts the approach operation into NC data. RA
It will be stored in the NC data storage area of M18.

Next is the contour forward machining operation of (4),
In addition, it is a machining operation that has an uncut portion, and since point b is defined as the approach point at this point, CNC
The CPU 19 for processing creates NC data of the machining movement operation that makes a round in the counterclockwise direction from the machining start point b to the machining end point d along the contour of the machining shape by a conversion program that converts the contour forward machining operation into NC data. However, the NC data of the approach operation is stored next in the NC data storage area of the RAM 18.

The next is the escape operation of (6). Since the point d is defined as the machining end point at this point, the point e set corresponding to this point d is automatically set as the escape point. To be selected. Therefore, the CNC CPU 19 creates the NC data for the machining movement operation from the machining end point d to the escape point e by the conversion program for converting the escape operation into NC data, and executes the contour forward direction machining operation. Next to the NC data, it will be stored in the NC data storage area of the RAM 18.

Next, since the wire cutting of (9) is performed, the CNC
The CPU 19 for storing stores the M code for cutting the wire in the NC data storage area of the RAM 18 next to the NC data for the escape operation.

Next, the movement to the approach start point of (7) is performed, but since the current position is the point e, the point a is selected as the approach start point. Therefore, the CNC CPU 19 uses the conversion program that creates the NC data for moving to the approach starting point,
NC data for moving operation from the escape point e (current position) to the approach start point a is created, and is stored in the NC data storage area of the RAM 18 next to the M code of the wire cutting command.

Next, since it is the wire connection of (10), CN
The CPU 19 for C stores the M code for connecting the wire in the NC data storage area of the RAM 18 next to the NC data for the approach operation.

Thereafter, the CNC CPU 19 moves to the approach operation of (3), the contour forward machining operation of (4), the escape operation of (6), the wire cutting of (9), and the approach starting point of (7). Each NC data of the wire connection of the movement (10) is created based on each conversion program and stored in the NC data storage area of the RAM 18 in order. The position of the wire at the end of wire connection in (10) is on the approach start point a.

The next is the approach operation (3). In this case, since the wire position immediately before the approach operation is on the point (a), the approach point is the point (b). Therefore, CNC
The CPU 19 for processing creates NC data for the machining movement operation from the approach start point a (current position) to the machining start point b by the conversion program for converting the approach operation into NC data, and the M code of the wire connection command. Then, the data is stored in the NC data storage area of the RAM 18.

Then, the operation (8) of cutting the uncut portion is performed next. In this case, since the end point of the approach operation selected before the uncut portion cutting operation is the approach point b, the CPU for CNC 19 uses the conversion program that creates the NC data for the uncut portion cutting operation. Based on the end point data b of the immediately preceding approach motion, the point escape start point d defined on the machining shape different from this end point b is selected as the target position, and it is required for the movement from the approach point b to the target position d. The NC data for the machining movement operation is created, and is stored in the NC data storage area of the RAM 18 next to the NC data for the approach operation.

Next, the escape operation (6) is performed. At this point, the wire is located on the escape start point d, so this point d
The escape point e set corresponding to is automatically selected as the escape point. Therefore, the CNC CPU 19 uses the conversion program that creates the NC data for the escape operation,
NC data for the machining movement operation from the machining end point d to the escape operation completion point e is created, and is stored in the NC data storage area of the RAM 18 next to the NC data for the uncut portion cutting operation.

Next, (11) since the discharge is off, the command for terminating the drive control of the discharge circuit 16 is stored in the NC data storage area of the RAM 18 next to the NC data for the escape operation. .

Finally, (12) Machining end is read, and the CNC CPU 19 follows the drive control end command, and then stops the power supply to the electric discharge machining power supply and the wire feed, and the machining liquid circulator. RA command to stop the tension motor and apply tension to the wire.
The data is stored in the NC data storage area of M18, and a series of NC data creation processing ends.

The created NC data corresponds to the machining shape, for example, the N of the RAM 18 corresponding to its name as already described.
It is stored in the C data storage area.

Next, as another example, the execution order of basic operations registered in advance in the "machining pattern list" as shown in FIG. 5 is called by the registered name, and the same machining shape (shape in FIG. 3) is called. A case where the NC data creation processing is performed on the display area 27) will be briefly described with reference to the example of FIG. In this case, the registered name of the called machining pattern is “contour plural times machining (forward / reverse, both directions)”. As described above, even when the execution order of the basic operations is called by the registered name, the NC data creation process is exactly the same as the above.

In the example of FIG. 4 as well, the basic operation up to the fifth is exactly the same as in the example of FIG. 3, and when the fifth basic operation is completed, the wire position is located at the escape point e. In the example of FIG. 4, the sixth basic operation is the approach operation (3), which is different from the above example.

In the approach operation in this case, since the current position is the escape point e, this point e becomes the approach start point, and the point d corresponding to this point e becomes the approach point,
The CNC CPU 19 automatically selects the point d as the approach point, and N for the approach operation from the point e to the point d.
The C data is created and stored in the NC data storage area of the RAM 18 next to the NC data for the escape operation. In other words, even with the same basic movement as the approach movement, machining movement data that is completely different from the third approach movement described above is created.

As described above, the control device 11 employed in this embodiment is provided with a function for determining the next moving target position by judging the combinational relationship between the basic operations, Even when the combination of operations, the execution order, etc. are changed, it is possible to select a target movement position and create appropriate NC data based on the mutual combination relationship.

Next, the contour reverse direction machining operation of (5),
In addition, it is a machining operation that has an uncut portion, and since point d is defined as the approach point at this point, CNC
The CPU for use 19 follows the contour of the machining shape by the conversion program for converting the contour reverse machining operation into NC data.
NC of machining movement operation that makes one round clockwise from d to point b
Data will be created and stored in the NC data storage area of the RAM 18 next to the NC data of the approach operation.

The next is the escape operation of (6), but since point b is defined as the machining end point at this point, point a set corresponding to this point b is automatically set as the escape point. To be selected. Therefore, the CNC CPU 19 creates NC data for the machining movement operation from the machining end point b to the escape point a, and stores it in the NC data storage area of the RAM 18 next to the NC data for the contour reverse direction machining operation. Will be done. This escape motion is also the same as the case of the sixth approach motion for the third approach motion, and the fifth motion.
The content is different from that of the fifth escape movement, and even if the movement is the same basic movement, machining movement data different from that of the fifth approach movement is created.

The next is the approach operation of (3). In this case, since the current wire position is the point (a), the corresponding point (b) becomes the approach point, and the CNC CPU 19 , NC data for the machining movement operation from the point a (current position) to the approach point b is created, and is stored in the NC data storage area of the RAM 18 next to the NC data for the escape operation.

The next operation (8) is the uncut portion cutting operation. In this case, since the end point of the approach operation selected before the uncut portion cutting operation is point b, CN
The CPU 19 for C determines the end point data of the immediately preceding approach operation.
Based on b, select the point d defined on the other machining shape different from this end point b as the target position, and perform NC for the machining movement operation required to move from the point b to the target position d. Data is created and N for the approach motion
After the C data, it is stored in the NC data storage area of the RAM 18.

Next, the escape operation (6) is performed. At this point, however, since the wire is located above the processing end point d, this point d
The point e set to correspond to is automatically selected as the escape point. Therefore, the CNC CPU 19 determines that the machining end point d
The NC data for the machining movement operation from the to the escape point e is created, and is stored in the NC data storage area of the RAM 18 next to the NC data for the uncut portion cutting operation.

Since the subsequent discharge-off in (11) and the end of machining in (12) are not accompanied by substantial NC data relating to the movement, there is no change in the contents due to the combination of basic operations or the execution order. The M code or the like corresponding thereto is simply stored in the NC data storage area of the RAM 18 according to the execution order. The above-mentioned processing preparation in (1) and discharge-on in (2) are similar to these, and changes in the combination of basic operations and execution order do not change the contents.

As described above, according to the "machining pattern creating process" of this embodiment, basic operations required for achieving wire electric discharge machining, such as machining preparation, discharge on, approach operation, contour, Forward machining operation, reverse contour machining operation, escape operation, move to approach start point,
A series of machining patterns (= execution order of basic operations) is created by arbitrarily combining basic operations such as uncut portion cutting operation, wire cutting, wire connection, discharge off, and machining end, and NC is automatically performed accordingly. Since data can be created, it is possible to perform wire electric discharge machining with a free machining pattern without being bound by the machining pattern recommended by the manufacturer as in the conventional NC data creating method.

Therefore, particularly, the range of processing choices can be widened to a user who is technically at a high level or a user who performs special processing, and the possibility of higher level processing is provided. Also, when creating NC data of a special processing pattern, it is not necessary to assemble a primitive processing program by manual operation that makes full use of various codes and numerical data, so the operator is overloaded. Nor.

The machining pattern once set has a registered name (machining type) such as "contour multiple times machining (forward direction only)" or "contour multiple times machining (forward / reverse, both directions)". By doing so, nonvolatile storage is possible. Therefore, when a machining shape with similar characteristics is designed, the machining pattern once registered is called as it is to automatically create NC data according to the machining shape, or addition, insertion, deletion, etc. Since NC data can be automatically created by partially modifying it by editing work of, it is also useful for accumulating technical know-how. In other words, it is possible to freely develop and register a machining pattern unique to the user, and freely call and use it.

Since there are various layers of users, even for a user with little experience, some of the machining patterns corresponding to the standard situation may be registered in advance by the manufacturer side before the device is shipped. Good.

[0075]

According to the present invention, the basic operation required for wire electric discharge machining is used as one unit of pattern formation.
It is possible to freely set a processing pattern suitable for the user's purpose and automatically create NC data along this processing pattern within a short time. Further, the machining pattern once created is stored, and this machining pattern is used as it is for automatic creation of NC data of another machining shape.
It is also possible to insert, add, or delete other basic motions to the machining pattern stored in advance, partially modify the machining pattern, and then use it for automatic creation of NC data of other machining shapes. Can be carried out. As a result, compared with the case where NC data is created by using a machining pattern uniquely determined by the manufacturer, the range of machining selection is greatly expanded, especially for users who are technically at a high level. For users who perform or special processing,
Higher level processing is possible.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a wire electric discharge machine and its control device.

FIG. 2 is a schematic view showing an example of a processed shape.

FIG. 3 is a conceptual diagram showing an example of a setting screen when creating a processing pattern.

FIG. 4 is a conceptual diagram showing an example of a setting screen when creating a processing pattern.

FIG. 5 is a conceptual diagram showing an example of a processing pattern selection screen.

FIG. 6 is a diagram illustrating a processing operation.

[Explanation of Codes] 1 Bed 2 Support 3 Column 4 Arm 5 Cross Table 6 Processing Tank 7 Wire 11 Controller 17 ROM 18 RAM 19 CNC CPU 23 Manual Data Input Device with Display 24 Nonvolatile RAM

Claims (3)

[Claims] 1. An operation required for wire electric discharge machining is divided into basic operations, each basic operation item is prepared in advance, and a machining pattern is set by arbitrarily setting the execution order of the basic operation items. An NC data creating method for a wire electric discharge machine is characterized in that NC data for automatically performing wire electric discharge machining is automatically created based on a set machining pattern and a preset machining shape and machining conditions. 2. A wire discharge is provided based on the selected machining pattern and preset machining shape and machining conditions by providing a storage means for storing the machining pattern already created. The NC data creating method for a wire electric discharge machine according to claim 1, wherein a series of NC data required for machining is automatically created. 3. The wire discharge according to claim 2, wherein a basic operation item is inserted, added or deleted from the machining pattern stored in the storage means to create a new machining pattern. NC data creation method in processing machine.