JP2001092514A - Method and device for preparing nc data, and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an NC data preparing method capable of preparing optimum NC data for a target to be worked, and to provide a device therefor. SOLUTION: A CPU 2 identifies for every graphic area or graphic element constituting the shape data of the target to be worked as a working component, defines a required condition for every working unit as an attribute for every working unit, combines a working tool to be used for an NC machine tool 102 and a working condition for the working tool as one piece of tool information, registers one or more kinds of tool information as a working order pattern in the order of use, determines an optimum combination with the working procedure pattern for every working unit on the basis of the attribute definition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to CAD data (Computer Aide) representing the shape of a workpiece.
d Design: Based on computer aided design (NC) data, NC (Numerica) for numerically controlled machine tools
l Control: Numerical control) NC to create data
The present invention relates to a data creation method and device, and a storage medium storing a control program for controlling the NC data creation device.

[0002]

2. Description of the Related Art The creation of NC data in a conventional NC data creation apparatus (for example, JP-A-6-143090) has been performed in the following procedure.

[0003] (1) If the median value of the designated dimensional tolerance is shifted to one side in the CAD shape data of the workpiece, the CAD shape is corrected to the middle of the tolerance. (2) An area or a graphic element using the same processing method is extracted as a processing target range from CAD shape data of the processing target object. The operator of the NC data generating apparatus determines whether to perform the same processing in consideration of the finished surface accuracy and tolerance width required by the processing part, the inclination of the shape of the workpiece due to processing resistance generated during cutting, and the like. (3) For the processing target range extracted in (2), a processing tool and processing conditions such as a cutting amount, a feed amount, and a rotation speed are specified in accordance with a processing procedure. (4) A tool trajectory for processing the range to be processed with the specified processing tool is created using the graphic processing function. (5) When processing one processing target range from roughing to finishing with a plurality of types of processing tools or processing conditions, the above (3) and (4) are repeated for the number of steps. (6) When a different processing method is used for each processing portion in the processing target, the above (2) to (5) are repeated.

[0004]

However, in the above-described conventional example, since it is necessary to specify a machining tool and machining conditions for each machining portion, the work of creating an NC program becomes complicated and the number of man-hours increases. At the same time, errors in the contents of the designated condition are likely to occur.

[0005] Further, if the range to be machined is not specified in detail in order to simplify the work of creating the NC program, an excessive machining procedure is performed depending on the machined part, and machining productivity is reduced.

When the machining procedure is changed for each machining site, NC data for a combination of (number of machining sites) × (number of tools used in the machining procedure) is created, and the NC data is created when the NC program is created. Handling of NC data in a machine tool becomes complicated.

[0007] In addition, the number of operations for exchanging machining tools and the like increases, and machining productivity decreases.

Further, as in the case of a thin plate shape island leaving process, etc.
When the shape of the object to be processed has a low rigidity, the shape of the object to be processed itself falls down due to the processing resistance generated at the time of the cutting processing, and there is a case where a processing failure occurs. As in this case, depending on the shape of the object to be machined, there are many cases in which the machining method is optimized and adapted for each machining region depending on the experience of the NC program creating operator. The response was difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and a first object of the present invention is to provide an optimum NC for an object to be processed.
An object of the present invention is to provide an NC data creation method and apparatus capable of creating data.

A second object of the present invention is to provide a storage medium storing a control program for controlling the above-described NC data generating apparatus of the present invention.

[0011]

In order to achieve the first object, an NC data creating method according to the first aspect of the present invention provides a method of producing a NC (Comp) which represents a shape of an object to be machined in advance.
NC for numerically controlled machine tools based on computer-aided design (computer-aided design) data.
(Numerical Control: numerical control) In an NC data creation method for creating data, a machining site identification step of identifying a machining region for each graphic region or graphic element constituting the shape data of the workpiece to be processed; An attribute definition step of attribute-defining requirements relating to respective machining, and a machining tool used in the numerically controlled machine tool and machining conditions therefor as one piece of tool information, and one or more types of the tool information as a machining procedure pattern in use order. A tool information registering step to be registered and a combination determining step of determining an optimum combination with the machining procedure pattern for each machining site based on the attribute definition are provided.

According to another aspect of the present invention, there is provided an NC data creating method for achieving the first object.
In the C data creation method, a disassembly step of disassembling the machining procedure pattern determined for each machining site unit into minimum machining configuration information including a combination of the machining site and the tool information; And a collective forming step of collectively forming the processing configuration information as the same processing tool group.

According to a third aspect of the present invention, there is provided an NC data generating method for achieving the first object.
In the C data creation method, there is provided a rearrangement step of rearranging a plurality of the same machining tool groups in a desired order, and a trajectory data creation step of creating trajectory data of machining tools for each of the same machining tool groups. It is characterized by.

According to a fourth aspect of the present invention, there is provided an NC data generating method according to the first, second or third aspect, wherein the requirement relating to the processing can be attribute-defined. A finished surface accuracy setting step of setting a finished surface accuracy.

According to a fifth aspect of the present invention, there is provided an NC data creating method according to the first, second, or third aspect, wherein the requirement relating to the processing can be attribute-defined. And a finished dimension tolerance setting step of setting a finished dimension tolerance.

According to a sixth aspect of the present invention, there is provided an NC data generating method for achieving the first object.
In the C data creation method, a correction amount calculating step of obtaining a correction amount for a shape dimension from an upper limit value and a lower limit value of the dimensional tolerance when the finished dimensional tolerance is set, and offsetting the shape data by the correction amount An offset processing step and a tool trajectory data creating step of creating the tool trajectory data for a target dimension at the time of machining created by the offset processing are provided.

According to a seventh aspect of the present invention, there is provided an NC data creating method according to the first to fifth or sixth aspects, wherein the requirement relating to the processing is attribute-defined. And a shape rigidity setting step of setting a shape rigidity with respect to a machining resistance at the time of machining the machining portion.

According to another aspect of the present invention, there is provided an NC data creating apparatus, comprising: a CAD (Computer) representing a shape of a workpiece which has been created in advance.
Based on Aided Design (computer aided design) data, NC (Nume) for numerically controlled machine tools
In the NC data creating apparatus for creating data, a machining area identifying means for identifying each machining area as a machining area for each of the graphic regions or graphic elements constituting the shape data of the object to be machined, Attribute definition means for attribute-defining requirements relating to each machining, and a machining tool used in the numerically controlled machine tool and machining conditions for the tool are registered as one piece of tool information, and one or more types of the tool information are registered as a machining procedure pattern in use order. Tool information registering means, and combination determining means for determining an optimum combination with the machining procedure pattern for each machining site based on the attribute definition.

In order to achieve the first object, the NC data generating apparatus according to the ninth aspect provides the NC data generating apparatus according to the eighth aspect.
In the C data creation device, a decomposing unit that decomposes the processing procedure pattern determined for each processing part into minimum processing configuration information including a combination of the processing part and the tool information; A collective forming means for collectively forming the processing configuration information as the same processing tool group.

According to a tenth aspect of the present invention, there is provided an NC data generating apparatus according to the ninth aspect, wherein the plurality of the same machining tool groups are arranged in a desired order. And a trajectory data creating means for creating trajectory data of the machining tool for each of the same machining tool groups.

In order to achieve the first object, the NC data generating apparatus according to the eleventh aspect is the NC data generating apparatus according to the eighth, ninth or tenth aspect, wherein the requirement relating to the processing can be attribute-defined. A finished surface accuracy setting means for setting the finished surface accuracy.

According to a twelfth aspect of the present invention, there is provided an NC data generating apparatus according to the eighth, ninth, or tenth aspect, wherein the requirement relating to the processing can be attribute-defined. And a finished dimension tolerance setting means for setting a finished dimension tolerance.

According to a thirteenth aspect of the present invention, there is provided an NC data creating apparatus according to the twelfth aspect, wherein the upper limit of the dimensional tolerance is set when the finished dimensional tolerance is set. Correction amount calculating means for calculating a correction amount for a shape dimension from a value and a lower limit value; offset processing means for offset processing the shape data by the correction amount; and Tool path data generating means for generating tool path data.

Further, in order to achieve the first object, the NC data generating apparatus according to the present invention is characterized in that:
14. The NC data creating apparatus according to item 2 or 13, further comprising a shape rigidity setting unit that sets a shape rigidity with respect to a machining resistance at the time of machining the machining portion as an item for which the requirement relating to the machining can be attribute-defined.

In order to achieve the second object, the storage medium according to the fifteenth aspect has a CAD (Computer Aide) representing a shape of a workpiece which has been prepared in advance.
NC (Numerical) for numerically controlled machine tools based on dDesign: computer aided design
(Control: numerical control) A storage medium storing a control program for controlling an NC data creating apparatus for creating data, wherein the control program comprises a graphic area or a graphic element constituting shape data of the workpiece. A processing part identification module for identifying each processing part as a processing part, an attribute definition for defining attributes of respective processing for each processing part unit, and a processing tool used in the numerically controlled machine tool and a processing condition for the same as one tool A tool information registration module for registering one or more types of tool information as information as a machining procedure pattern in the order of use, and a combination determining module for determining an optimal combination of the machining procedure pattern for each machining site based on the attribute definition And characterized in that:

In order to achieve the second object, a storage medium according to a sixteenth aspect is the storage medium according to the fifteenth aspect, wherein the control program is configured to execute the processing procedure pattern determined based on the processing part unit. It has a disassembly module for disassembling into minimum machining configuration information consisting of a combination of the machining part and the tool information, and a grouping forming module for grouping and forming the minimum machining configuration information having the same tool information as the same machining tool group. It is characterized by the following.

In order to achieve the second object, the storage medium according to claim 17 is the storage medium according to claim 16, wherein the control program stores a plurality of the same machining tool groups as desired. It has a rearrangement module for rearranging in order and a trajectory data creation module for creating trajectory data of a machining tool for each of the same machining tool groups.

In order to achieve the second object, the storage medium according to the present invention provides the storage medium according to the present invention.
7. The storage medium according to claim 7, wherein the control program includes a finished surface accuracy setting module for setting a finished surface accuracy as an item for which the requirement relating to the processing can be attribute-defined.

In order to achieve the second object, the storage medium according to the nineteenth aspect provides the storage medium according to the fifteenth, sixteenth, or one aspect.
7. The storage medium according to claim 7, wherein the control program includes a finished dimension tolerance setting module that sets a finished dimension tolerance as an item for which the requirement relating to the processing can be attribute-defined.

[0030] In order to achieve the second object, the storage medium according to claim 20 is the storage medium according to claim 19, wherein the control program is configured to set the dimensional tolerance when the finished dimensional tolerance is set. A correction amount calculation module for obtaining a correction amount for the shape dimension from the upper limit value and the lower limit value,
An offset processing module for offset processing the shape data by the correction amount, and a tool path data generation module for generating the tool path data for a target dimension at the time of machining created by the offset processing. .

In order to achieve the second object, a storage medium according to claim 21 is the storage medium according to any one of claims 15 to 19, wherein the control program is configured so that the requirement relating to the processing can be defined as an attribute. It is characterized by having a shape rigidity setting module for setting the shape rigidity with respect to the processing resistance at the time of processing the processing portion.

In order to achieve the second object, a storage medium according to claim 22 is the storage medium according to claims 15 to 20 or 21, wherein the storage medium is a floppy disk. I do.

In order to achieve the second object, a storage medium according to claim 23 is the storage medium according to claims 15 to 20 or 21, wherein the storage medium is a hard disk. .

In order to achieve the second object, a storage medium according to claim 24 is the storage medium according to claims 15 to 20 or 21, wherein the storage medium is an optical disk. .

In order to achieve the second object, a storage medium according to claim 25 is the storage medium according to claims 15 to 20 or 21, wherein the storage medium is a magneto-optical disk. And

In order to achieve the second object, a storage medium according to claim 26 is the storage medium according to claims 15 to 20 or 21, wherein the storage medium is a CD-ROM.
ROM (Compact Disk Read Onl)
y Memory).

In order to achieve the second object, a storage medium according to claim 27 is the storage medium according to claims 15 to 20 or 21, wherein the storage medium is a CD-ROM.
R (Compact Disk Recordable)
e).

In order to achieve the second object, a storage medium according to claim 28 is the storage medium according to claims 15 to 20 or 21, wherein the storage medium is a magnetic tape. I do.

In order to achieve the second object, a storage medium according to claim 29 is the storage medium according to claims 15 to 20 or 21, wherein the storage medium is a non-volatile memory card. Features.

In order to achieve the second object, a storage medium according to claim 30 is the storage medium according to claims 15 to 20 or 21, wherein the storage medium is a ROM.
(Read Only Memory) chip.

[0041]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of an NC machining system having an NC data creating device according to the present embodiment. In the figure, reference numeral 1 denotes an NC data creation device,
01 is a CAD device for designing parts and molds, etc., 102
Is an NC machine tool that processes a workpiece based on NC data.

The NC data creation device 1 includes a CPU (Central Processing Unit) 2 for controlling the entire device 1 and a CRT (Cath
A display device 3 such as a mode ray tube (cathode ray tube), an input device 4 such as a keyboard and a mouse, a control program for controlling the device 1, a ROM storing a program for NC data creation processing in the device, and the like. A read-only memory) 5, a RAM (random access memory) 6 for temporarily storing various processing results, a storage device 7 such as an HDD (hard disk drive), and a communication interface (communication I / F) 8. These are bus lines. 9
Are electrically connected via The storage device 7 includes a data file 7a for storing a three-dimensional model, CAD drawing data, and the like of a workpiece to be processed created in advance by an external device;
There is a specification file 7b for registering a machining pattern and tool data to be referred to in the present apparatus 1.

The communication I / F 8 is connected to a CAD device 101 and an NC machine tool 102 via a LAN (local area network) 100.

The operation of the NC data creating apparatus 1 (for example, a mold part designing apparatus) having the above-described configuration will be described.
This will be described with reference to FIGS.

FIG. 2 is a flowchart showing a design procedure in the NC data creating apparatus 1 according to the present embodiment.

In this embodiment, the NC data creation device 1
In a state where the three-dimensional part model of the workpiece is displayed on the display device 3 of FIG.
Then, a graphic area or a graphic element to be processed is selected as a processing target area. At this time, figures defining the same processing attribute can be collectively designated at this stage.

Next, in step S202, a processing attribute is set for each processing target area selected in step S201.

Here, FIGS. 3A and 3B are part drawings of the object to be processed for explaining the present invention. FIG. 3A is a plan view, and FIG.
Is a side view. FIG. 4 is a diagram showing a three-dimensional model (CAD model) of the object to be processed.
Is a processing area. FIG. 5 is a diagram showing an example of the processing attribute input screen. In this drawing, “selection area”, “surface accuracy”, “shape correction value”, “tolerance width”, and “shape rigidity” are displayed, respectively. ing.

The processing operations of steps S201 and S202 in FIG. 2 will be described with reference to FIGS.

The processing area in FIG. 4 is selected by the input device 4 (see FIG. 1) such as a mouse. When this selection is completed, the processing attribute input screen shown in FIG. 5 is displayed on the display device 3 (see FIG. 1), so that the drawing shown in FIG. 3 and the CA shown in FIG.
Data is input from the D model. In the present embodiment, a value of “0.8” is input as the processing attribute from the surface roughness symbol in FIG. Also, since the dimensional tolerance of the machining area is a one-sided tolerance of 0 to -0.02,
It is necessary to correct the machining data in the direction of cutting the 0.01 shape. Therefore, the shape correction amount “−0.0
Enter "1". Also, a value “0.02” is input as the tolerance width. In addition, the projection shape formed by the processing region 1 to FIG. 4 is a thin plate shape, and there is a possibility that the shape may fall due to cutting resistance during processing. Therefore, a weak value “1” is set for the shape rigidity.

In the same procedure as described above, the processing attributes are sequentially set for the processing area 1 to processing area in FIG.

FIG. 6 is a diagram showing an example of the input list in a state where the input is completed. In FIG.
(Identifier), surface accuracy (1.6 when omitted), shape correction amount (0 when omitted), tolerance width (0.04 when omitted), and shape rigidity rank (3 when omitted) are displayed.

It should be noted that a standard value in the case where input is omitted for each attribute value can be set in advance for each workpiece, and input can be minimized.

Returning to FIG. 2 again, it is determined in step S203 whether or not the attribute definition of all the processing parts has been completed.
If it is determined that the attribute definitions of all the processing parts are not completed, the input mode (steps S201 to S203) is not completed, and the process returns to step S201 to select a graphic area / graphic element again.

On the other hand, if it is determined in step S203 that the attribute definitions of all the machining parts have been completed, the input mode is completed, and a fully automatic data processing mode (steps S204 to S209) is started. In the data processing mode, first, step S20
In step 4, the name of the processing procedure pattern to be used is determined based on the processing attributes, and the data of each pattern is extracted.

FIG. 7 is a diagram showing an example of a table for searching for a processing procedure pattern name from a processing attribute. In FIG. 7, each of a surface accuracy, a tolerance width, a shape rigidity rank, and a processing procedure pattern name is shown. Each has data.

FIG. 8 is a diagram showing an example of a processing procedure pattern configuration table which is an example of registration of a processing procedure pattern. In the figure, the order of using the tools,
Processing conditions such as the allowance and the cutting amount can be registered. In addition to the processing conditions shown in FIG. 8, it is possible to register data required for NC data creation, such as a tool rotation speed, a processing direction, a cutting fluid, and the like.

FIG. 9 is a diagram for explaining a series of data processing procedures. In the figure, the numerical values in parentheses after the tool number are the remaining margin and the cutting amount. Numerical values in parentheses after the machining region number are also a margin and a cutting amount.

Returning to FIG. 2 again, in step S205, a used processing procedure pattern is determined for each processing area. As a specific example, as shown in FIG. 9, a processing procedure pattern “a-2-1” is provided for a processing area, and a processing procedure pattern “b-4-1” is provided for a processing area to. , The processing procedure pattern “a-2-3” for the processing area, and the processing procedure pattern “b-4-3” for the processing area
3 ”is a processing procedure pattern“ b ”for the processing area.
-2-3 "has been determined (selected).

Returning to FIG. 2 again, in step S206, attention is paid to the tool used, which is the registered data of the machining procedure pattern.
The minimum processing configuration information including the processing area and the tool to be used is created. As a specific example, as shown in FIG. 9, for the machining area, three pieces of minimum machining configuration information of tools 1 to 3 are:
For the machining area 〜, two pieces of minimum machining configuration information of the tools 1 and 3 are provided.
Is the minimum processing configuration information for the processing area ~
One piece of minimum machining configuration information of the tool 1 is created, and two pieces of minimum machining configuration information of the tools 1 and 3 are created for the machining area.

Returning to FIG. 2, the minimum machining configuration information created for each machining area in step S207 is collected for each tool. In the three-dimensional model in FIG. 4, data is collected into three types of tools. As a specific example, as shown in FIG.
For the tool 1, the processing areas 、, for the tool 2, the processing areas 、, and for the tool 3, the processing areas 〜 are respectively collected.

Returning to FIG. 2, in step S208,
The data for each tool is rearranged in accordance with the convenience of the machining side (the data is rearranged in accordance with the order of use of the tools during machining). Next, in step S209, step S20
7, based on the minimum machining configuration information collected for each tool,
After the NC tool trajectory data (NC data) is created for each tool, this processing operation ends.

FIG. 10 is a diagram showing a processing range of the tool 1 for processing the three-dimensional model shown in FIG. this is,
Although rough machining is performed, “+0.1” is set as the finishing allowance for parts with dimensional tolerances within 0.06 within the tolerance width, and “+1.0” is set as the finishing allowance for parts with low rigidity. Have been.

FIG. 11 is a diagram showing a processing range of the tool 2 for processing the three-dimensional model shown in FIG. this is,
This corresponds to a general finishing process, and a finishing tool trajectory is created in a portion within a tolerance width of “0.06”. In addition, for the one-side tolerance portion of “0 to +0.02” in the processing area in FIG. 4, data correction of “+0.01” is performed on the drawing dimensions. In the example, the drawing size 70 “0 to +0.0
For 2 ”, the tool path is created at 70.01.

FIG. 12 is a diagram showing a processing range of the tool 3 for processing the three-dimensional model shown in FIG. this is,
This corresponds to a finishing step of processing a part having low shape rigidity under special processing conditions. In this processing, low-load cutting with a cutting amount of “0.5” is performed only in the processing target shape portion. FIG.
For the one-side tolerance portion of “−0.02 to +0.02” in the middle processing area, data correction of “−0.01” is performed on the drawing dimensions. In the example, the drawing dimension 40 "0
With respect to “−0.02”, the tool path is created at 39.99.

Further, in the NC data creating apparatus according to the present embodiment, the functions of the present embodiment described above are realized by the computer reading and executing the control program stored in the storage medium. However, the present invention is not limited to this, and performs a part or all of actual processing such as an OS (Operating System) running on a computer based on the instruction of the control program, and performs the processing described above. Needless to say, a case where the function of the present embodiment is realized is also included.

As a storage medium for storing the control program, for example, a floppy disk, hard disk, optical disk, magneto-optical disk, CD-ROM (Co-ROM)
mpact Disk Read Only Memo
ry), CD-R (Compact Disk Rec)
order, a magnetic tape, a nonvolatile memory card, a ROM chip, or the like.

[0069]

As described above in detail, according to the NC data creating method and apparatus of the present invention, a simple method of designating a machining method for an object to be machined which requires changing the machining procedure for each machining area. Can be applied, so that the NC program creation work can be made more efficient. In addition, it is possible to reduce mistakes in specifying a processing method and the like, and to enhance the reliability of NC data. In addition, since NC data can be simultaneously created for parts using the same tool for different machining parts, machining productivity can be improved. Furthermore, even for a part requiring special processing conditions, only a processing attribute is defined, and even a relatively inexperienced worker can obtain N
Creation of C data is possible.

According to the storage medium of the present invention, it is possible to smoothly control the above-described NC data generating apparatus of the present invention.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an NC machining system having an NC data creation device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a design procedure in a mold part design device which is an NC data creation device according to one embodiment of the present invention.

FIG. 3 is a component diagram of an object to be processed, illustrating an NC data creating apparatus according to one embodiment of the present invention.

FIG. 4 is a view showing a three-dimensional model of a workpiece to be described, illustrating an NC data creating apparatus according to one embodiment of the present invention.

FIG. 5 is a diagram showing an example of a processing attribute input screen in the NC data creating device according to one embodiment of the present invention.

FIG. 6 is a diagram showing an example of a processing attribute input list in the NC data creating device according to one embodiment of the present invention.

FIG. 7 is a diagram showing an example of a machining procedure pattern determination table in the NC data creation device according to one embodiment of the present invention.

FIG. 8 is a diagram showing an example of a processing procedure pattern configuration table in the NC data creation device according to one embodiment of the present invention.

FIG. 9 is a diagram for explaining a data processing procedure in the NC data creation device according to one embodiment of the present invention.

FIG. 10 is a diagram showing a processing range by the tool 1 in the NC data generating device according to one embodiment of the present invention.

FIG. 11 is a diagram showing a processing range by the tool 2 in the NC data creating device according to one embodiment of the present invention.

FIG. 12 is a diagram showing a processing range by the tool 3 in the NC data creating device according to one embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 NC data creation device 2 CPU (central processing unit) 3 Display means (CRT) 4 Input device (keyboard) 5 ROM (read only memory) 6 RAM (random access memory) 7 Storage device (HDD) 7a Data file 7b Specifications File 8 communication I / F (interface) 9 bus line 100 LAN (local area network) 101 CAD device 102 NC machine tool

Claims (30)

[Claims] 1. A CAD (Computer Aided Design) representing a shape of an object to be processed created in advance.
gn: NC (Numerical Control) for numerically controlled machine tools based on computer aided design
rl: numerical control) in an NC data creation method for creating data, a machining site identification step for identifying a machining region for each graphic region or graphic element constituting the shape data of the object to be machined; An attribute definition step of attribute-defining requirements relating to machining, and a machining tool used in the numerically controlled machine tool and machining conditions for the tool are registered as one piece of tool information, and one or more types of the tool information are registered as machining procedure patterns in the order of use. An NC data creating method, comprising: a tool information registering step; and a combination determining step of determining an optimal combination with the machining procedure pattern for each machining region based on the attribute definition. 2. A disassembly step of disassembling the machining procedure pattern determined for each machining site unit into minimum machining configuration information including a combination of the machining site and the tool information, and the minimum machining having the same tool information. 2. The NC data creation method according to claim 1, further comprising a step of forming and forming the configuration information as the same processing tool group. 3. A step of rearranging a plurality of the same machining tool groups in a desired order, and a trajectory data creating step of creating trajectory data of machining tools for each of the same machining tool groups. 3. The NC data creating method according to claim 2, wherein: 4. The NC data creating method according to claim 1, further comprising a finished surface accuracy setting step of setting a finished surface accuracy as an item for which the requirement relating to the processing can be attribute-defined. 5. A finished dimension tolerance setting step of setting a finished dimension tolerance as an item for which the requirement relating to the processing can be attribute-defined.
Or the NC data creation method described in 3. 6. A correction amount calculating step for obtaining a correction amount for a shape dimension from an upper limit value and a lower limit value of the dimensional tolerance when the finished dimensional tolerance is set, and an offset for offset processing the shape data by the correction amount. 6. The NC data creating method according to claim 5, further comprising a processing step and a tool trajectory data creating step of creating the tool trajectory data for a target dimension at the time of machining created by the offset processing. 7. The method according to claim 1, further comprising a step of setting a shape rigidity with respect to a machining resistance at the time of machining of the machining portion as an item for which the requirement relating to the machining can be attribute-defined. How to create NC data. 8. A CAD (Computer Aided Design) representing a shape of a work piece created in advance.
gn: NC (Numerical Control) for numerically controlled machine tools based on computer aided design
a numerical data control unit for generating data; a machining region identifying means for identifying a graphic region or a graphic element constituting the shape data of the object to be machined as a machining region; Attribute defining means for attribute defining requirements for machining, and a machining tool used in the numerically controlled machine tool and machining conditions for the tool are registered as one piece of tool information, and one or more types of the tool information are registered as machining procedure patterns in the order of use. N comprising: tool information registration means; and combination determination means for determining an optimal combination with the machining procedure pattern for each machining site based on the attribute definition.
C data creation device. 9. Decomposing means for decomposing the machining procedure pattern determined for each machining site into minimum machining configuration information including a combination of the machining site and the tool information,
9. The NC data creating apparatus according to claim 8, further comprising: a group forming unit configured to group and form the minimum processing configuration information having the same tool information as a same processing tool group. 10. A reordering means for rearranging a plurality of the same machining tool groups in a desired order, and a trajectory data creating means for creating trajectory data of machining tools for each of the same machining tool groups. 10. The NC data creation device according to claim 9, wherein: 11. The NC data creating apparatus according to claim 8, further comprising a finished surface accuracy setting means for setting a finished surface accuracy as an item for which the requirement relating to the processing can be attribute-defined. 12. The NC data creating apparatus according to claim 8, further comprising a finished dimension tolerance setting means for setting a finished dimension tolerance as an item for which the requirement relating to the processing can be attribute-defined. 13. A correction amount calculating means for calculating a correction amount for a shape dimension from an upper limit value and a lower limit value of the dimensional tolerance when the finished dimensional tolerance is set, and an offset for offset-processing the shape data by the correction amount. Processing means;
13. The NC data creating apparatus according to claim 12, further comprising tool trajectory data creating means for creating the tool trajectory data for a target dimension at the time of machining created by the offset processing. 14. The apparatus according to claim 8, further comprising a shape rigidity setting means for setting a shape rigidity with respect to a machining resistance at the time of machining the machining portion as an item for which the requirement relating to the machining can be attribute-defined. NC data creation device. 15. A CAD (Computer Aided Des) representing a shape of an object to be processed created in advance.
Ign: Computer-aided design (NC) data based on NC (Numerical Con
(control: numerical control) A storage medium storing a control program for controlling an NC data creating apparatus for creating data, wherein the control program comprises a graphic area or a graphic element constituting shape data of the workpiece. A processing part identification module for identifying each processing part as a processing part, an attribute definition for defining attributes of respective processing for each processing part unit, and a processing tool used in the numerically controlled machine tool and a processing condition for the same as one tool A tool information registration module for registering one or more types of tool information as information as a machining procedure pattern in the order of use, and a combination determining module for determining an optimal combination of the machining procedure pattern for each machining site based on the attribute definition And a storage medium comprising: 16. The disassembly module for disassembling the machining procedure pattern determined for each machining site unit into minimum machining configuration information comprising a combination of the machining site and the tool information, the control program comprising: 16. The storage medium according to claim 15, further comprising: a group forming module that groups and forms the minimum processing configuration information having the same as the same processing tool group. 17. The control program, wherein a rearrangement module for rearranging a plurality of the same machining tool groups in a desired order, and a trajectory data creation module for creating trajectory data of machining tools for each of the same machining tool groups 17. The storage medium according to claim 16, comprising: 18. The storage medium according to claim 15, wherein said control program has a finished surface accuracy setting module for setting a finished surface accuracy as an item for which attributes relating to said processing can be defined. 19. The storage medium according to claim 15, wherein the control program has a finished dimension tolerance setting module for setting a finished dimension tolerance as an item for which the requirement relating to the processing can be attribute-defined. 20. The control program, comprising: a correction amount calculation module for obtaining a correction amount for a shape dimension from an upper limit value and a lower limit value of the dimensional tolerance when the finished dimensional tolerance is set; 20. The storage medium according to claim 19, further comprising: an offset processing module that performs offset processing on the tool path data; and a tool path data generation module that generates the tool path data for a target dimension at the time of machining created by the offset processing. 21. The control program according to claim 15, further comprising a shape rigidity setting module for setting a shape rigidity with respect to a machining resistance at the time of machining the machining portion as an item for defining the requirement relating to the machining as an attribute. 21. The storage medium according to 19 or 20. 22. The storage medium according to claim 15, wherein the storage medium is a floppy disk.
The storage medium according to the above. 23. The storage medium according to claim 15, wherein the storage medium is a hard disk. 24. The storage medium according to claim 15, wherein the storage medium is an optical disk. 25. The storage medium according to claim 15, wherein the storage medium is a magneto-optical disk. 26. The storage medium is a CD-ROM (Co-ROM).
mpact Disk Read Only Memo
22. The storage medium according to claim 15, wherein the storage medium is ry). 27. The storage medium is a CD-R (Comp)
22. The storage medium according to claim 15, wherein the storage medium is an act disk recordable. 28. The storage medium according to claim 15, wherein the storage medium is a magnetic tape. 29. The storage medium according to claim 15, wherein the storage medium is a nonvolatile memory card.
The storage medium according to claim 1. 30. The storage medium according to claim 1, wherein the storage medium is a ROM (Read
22. The storage medium according to claim 15, wherein the storage medium is an Only Memory (chip) chip.