JP2001100824A - Method and device for preparing nc data and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for preparing NC data, capable of simultaneously preparing NC data suitable for high-efficiency working and the other NC data. SOLUTION: A CPU 2 designates a use tool diameter to be used for real working and a virtual tool diameter which is greater than this use tool diameter, determines a workable range capable of working, while making the use tool diameter satisfy point contact conditions by using the virtual tool diameter and controls this workable range so as to generate a tool locus with the use tool diameter.

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 Generally, when performing high-efficiency machining such as high-speed feed machining or deep cutting by an end mill using an NC machine tool such as a machining center, the cutting load applied to a tool is controlled to a constant light load. In order to facilitate the removal of chips generated during cutting and cutting, the thickness of the target tool must not exceed the cutting depth set for the target tool (hereinafter referred to as point contact condition). It is sometimes necessary to create a tool trajectory of NC data that satisfies the condition that the tool and the workpiece are in point contact.

The prior art relating to this is shown in FIGS.
2 will be described.

FIG. 10 is a diagram showing an example of a tool trajectory for point contact machining in the prior art, FIG. 11 is a diagram showing an example of a tool trajectory that does not satisfy the point contact condition which is a problem in the prior art, and FIG. FIG. 9 is a diagram showing an example of NC data created by dividing a processing target area in a conventional technique.

[0005] In FIG. 10, A 0 is a processing target area, and A
Reference numeral 1 denotes a high surface (high surface) through which a tool cannot enter. Also,
CL1, CL2, and CL3 are tool trajectories created under the point contact conditions. This can be easily created by offsetting the boundary line L0 serving as the wall of the processing target area A0 by a predetermined amount in the plane direction. Point P on tool path CL1
Is the contact point between the tool T0 and the boundary line L0 when the tool T0 is located at

However, as shown in FIG. 11, consider a case where a tool path is created by a normal offset function for a shape including a groove shape and the like. For the processing area A2, the high surface A
Tool trajectory with contour 3 offset from outside CL25
Processing is performed so that a certain amount of cut is made in the order of CL21 to CL21. At this time, the groove shape C2 and the corner shape C3
As a result, the point contact relationship between the tool and the workpiece is broken, and the contact arc between the tool and the workpiece becomes longer. In the case of high-efficiency machining, high-speed feed conditions and deep cutting conditions are set on the premise of point contact, which causes machining failures such as tool breakage, overcutting of the workpiece due to tool deflection, etc. .

On the other hand, in the prior art, as shown in FIG. 12, a high-efficiency processing range A4 and normal processing ranges A5 to A5 are used.
6 is divided using the dividing lines E1 and E2, and an NC program of machining conditions corresponding to each is separately created. The determination and work of the division of the machining area are left to the experience and skill of the NC programmer who operates the NC data creation device.

[0008]

However, in the above-described method for creating an NC program according to the prior art, a point where point contact machining is impossible in a machining shape is grasped in advance, and tools and machining conditions are changed for each shape. A step of creating an NC program is required. For this reason, the NC data can be created only by skilled workers, and the task of creating the NC program becomes complicated, which causes a problem that a great deal of time is required. Further, with the complicated creation of the NC program, there is an increased possibility that troubles such as tool breakage during machining due to erroneous work and excessive interference with the workpiece occur.

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 a high-speed feeding in which a tool and a workpiece are in point contact. NC programs suitable for high-efficiency machining of deep and deep cuts, and NC conditions that are appropriate for local shapes with high cutting loads in other groove shapes and corners
An object of the present invention is to provide an NC data creation method and apparatus capable of creating a program simultaneously.

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 tool diameter designation step of designating a diameter of a tool used in actual machining and a diameter of a virtual tool having a diameter larger than the diameter of the tool used, In the diameter of the used tool using the diameter of the virtual tool, a condition in which the thickness (cut amount) for removing the workpiece does not exceed the cut amount set as a processing condition for the used tool (hereinafter, a point contact condition) A processable range determining step of determining a processable range in which processing can be performed satisfying the following.
A tool trajectory creating step of creating a tool trajectory with the diameter of the tool to be used for the workable range.

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, an uncut area extracting step of extracting a part excluding the workable area from the shape of the object to be processed as an uncut area, and invading the uncut area with the diameter of the tool used. And a second tool trajectory creating step of creating a tool trajectory in which a machining condition of a tool is changed for the intrudable part.

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, a second diameter for designating a tool diameter smaller than the diameter of the tool to be used for the uncut area is specified.
And a third tool trajectory creating step of creating a tool trajectory for machining the uncut area with a tool having a diameter smaller than the diameter of the tool to be used.

According to a fourth aspect of the present invention, there is provided an NC data creating method according to the first aspect, wherein the diameter of the tool to be used and the virtual tool are set. Registering the diameter of the tool and the diameter of the tool smaller than the diameter of the tool to be used and the processing conditions of the tool in a file in advance;
NC data creating step of creating data.

According to a fifth aspect of the present invention, there is provided an NC data generating method for achieving the first object.
In the NC data creation method described above, the machining condition of the tool is a cutting amount, a feed speed, and a rotation speed of the tool.

According to a sixth aspect of the present invention, there is provided an NC data generating apparatus for generating a CAD (Computer) representing a shape of an object to be processed which has been generated in advance.
Based on Aided Design (computer aided design) data, NC (Nume) for numerically controlled machine tools
a numerical control), an NC data creating apparatus for creating data, a tool diameter designating means for designating a diameter of a tool used in actual machining and a diameter of a virtual tool larger than the diameter of the tool used; In the diameter of the working tool using the diameter of the virtual tool, a condition in which the thickness (cutting amount) for removing the workpiece does not exceed the cutting amount set as the processing condition for the working tool (hereinafter, point contact condition and And a tool path creating means for creating a tool path using the diameter of the used tool with respect to the workable area. And

According to a seventh aspect of the present invention, there is provided an NC data creating apparatus for achieving the first object.
In the C data creation device, an uncut area extracting means for extracting a part excluding the workable area from the shape of the object to be processed as an uncut area, and a tool which can enter the uncut area with a diameter of the tool used. And a second tool trajectory creating means for creating a tool trajectory in which a machining condition of a tool is changed with respect to the intrudable part.

According to another aspect of the present invention, there is provided an NC data generating apparatus for achieving the first object.
In the C data creation device, a second tool for designating a tool diameter smaller than the tool diameter for the uncut area is used.
And a third tool trajectory creating means for creating a tool trajectory for machining the uncut area with a tool having a diameter smaller than the diameter of the tool to be used.

According to a ninth aspect of the present invention, there is provided an NC data creating apparatus according to the sixth aspect, wherein the diameter of the tool to be used and the virtual tool are set. Register means for registering the diameter of a tool smaller than the diameter of the tool and the diameter of the tool used and the processing conditions of the tool in a file in advance, and NC data creating means for creating NC data according to the file. I do.

According to a tenth aspect of the present invention, in order to achieve the first object, in the NC data generating apparatus according to the seventh or ninth aspect, the machining condition of the tool is defined as: It is characterized by a cutting amount, a feed speed, and a rotation speed.

In order to achieve the second object, the storage medium according to the eleventh aspect has a CAD (Computer Aide) representing a shape of an object to be processed prepared in advance.
NC (Numerical) for numerically controlled machine tools based on dDesign: computer aided design
(Control: Numerical control) A computer-readable storage medium storing a control program for controlling an NC data generating apparatus for generating data, wherein the control program includes a diameter of a tool used in actual machining. A tool diameter specifying module for specifying the diameter of a virtual tool having a diameter larger than the diameter of the used tool; and a thickness (cutting amount) for removing a workpiece at the diameter of the used tool using the diameter of the virtual tool. A workable range determination module that determines a workable range that can be machined by satisfying a condition (hereinafter, referred to as a point contact condition) that does not exceed a cutting amount set as a machining condition for the tool to be used; A tool trajectory creation module for creating a tool trajectory with the diameter of the tool to be used for a range.

In order to achieve the second object, a storage medium according to claim 12 is the storage medium according to claim 11, wherein the control program determines the processable range from the shape of the processing object. An uncut portion extraction module that extracts the excluded portion as a uncut portion, an intrudable portion extraction module that extracts a portion that can be intruded with the diameter of the used tool with respect to the uncut portion, and an intrudable portion extraction module. A second tool trajectory creation module for creating a tool trajectory in which the machining conditions of the tool are changed.

In order to achieve the second object, a storage medium according to a thirteenth aspect is the storage medium according to the twelfth aspect, wherein the control program determines a diameter of the tool to be used with respect to the uncut area. A second tool diameter designation module for designating a diameter of a tool smaller than the diameter of the tool, a third tool path creation module for creating a tool path for machining the uncut area with a tool smaller in diameter than the diameter of the tool to be used, and It is characterized by having.

According to another aspect of the present invention, there is provided a storage medium according to the present invention.
3. The storage medium according to claim 3, wherein the control program registers the diameter of the tool to be used, the diameter of the virtual tool, the diameter of the tool smaller than the diameter of the tool to be used, and the processing conditions of the tool in a file in advance. And an NC data creation module for creating NC data according to the file.

In order to attain the second object, the storage medium according to claim 15 is the storage medium according to claim 12 or 14, wherein the processing conditions of the tool include: It is characterized by speed and rotation speed.

In order to achieve the second object, a storage medium according to claim 16 is the storage medium according to claims 11 to 14 or 15, wherein the storage medium is a floppy disk. I do.

In order to achieve the second object, a storage medium according to claim 17 is the storage medium according to claims 11 to 14 or 15, wherein the storage medium is a hard disk. .

In order to achieve the second object, a storage medium according to claim 18 is the storage medium according to claims 11 to 14 or 15, wherein the storage medium is an optical disk. .

In order to achieve the second object, a storage medium according to claim 19 is the storage medium according to claims 11 to 14 or 15, wherein the storage medium is a magneto-optical disk. And

In order to achieve the second object, the storage medium according to claim 20 is the storage medium according to claims 11 to 14 or 15, wherein the storage medium is a CD-ROM.
ROM (Compact Disk Read Onl)
y Memory).

In order to achieve the second object, the storage medium according to claim 21 is the storage medium according to claims 11 to 14 or 15, 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 22 is the storage medium according to claims 11 to 14 or 15, wherein the storage medium is a magnetic tape. I do.

In order to achieve the second object, a storage medium according to claim 23 is the storage medium according to claims 11 to 14 or 15, wherein the storage medium is a nonvolatile memory card. Features.

In order to achieve the second object, a storage medium according to claim 24 is the storage medium according to claims 11 to 14 or 15, wherein the storage medium is a ROM.
(Read Only Memory) chip.

[0035]

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, an NC machine tool 102, and a storage medium 103 via a LAN (local area network) 100.

The storage medium 103 stores a control program (information processing program) for causing a computer to execute the CAD data creation method (tool trajectory creation method) of the present invention, and is readable by the computer.
As this storage medium, for example, a floppy disk,
Hard disk, optical disk, magneto-optical disk, CD-
ROM (Compact Disk Read Onl)
y Memory), CD-R (Compact Di)
sk Recordable), a magnetic tape, a nonvolatile memory card, a ROM chip, or the like.

The operation of the NC data generating apparatus 1 having the above-described configuration 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.
FIG. 4 is a diagram showing an example of a drawing of a part to be processed to which the NC data generating device according to the present embodiment is applied, and FIG. 4 is a diagram illustrating a center locus of a virtual tool in the NC data generating device according to the present embodiment. FIG. 5 is a diagram illustrating an example, FIG. 5 is a diagram illustrating an example of creating a high-efficiency machining area in the NC data creating apparatus according to the present embodiment, and FIG. 6 is a diagram illustrating an NC according to the present embodiment.
FIG. 7 is a diagram showing an example of creating the uncut area 1 in the data creating device, FIG. 7 is a diagram showing an example of creating a tool path under the dotted line connection condition in the NC data creating device according to the present embodiment, and FIG. FIG. 9 is a diagram illustrating an example of creating a tool path of a part that does not satisfy a point contact condition in the NC data creating apparatus according to the embodiment. FIG. 9 is a diagram illustrating an NC according to the present embodiment.
FIG. 7 is a diagram illustrating an example of creating a tool path for machining the uncut area 2 with a small-diameter tool in the data creating device.

In this embodiment, the NC data creation device 1
In the state where a three-dimensional part model or a two-dimensional CAD drawing of the object to be processed is displayed on the display device 3 of FIG.
First, in step S200, a graphic area or a graphic range to be processed is selected as a processing target area.

FIG. 3 is a diagram showing an example of a two-dimensional CAD drawing of an object to be processed. FIG. 3A is a plan view, and FIG.
Is a side view. FIG. 3 is a diagram showing a simple example, but includes a shape that cannot satisfy the point contact condition, such as a groove shape and an inner corner portion. FIG.
, A2 is a machining target area, and A3 is a high area into which a tool cannot enter. Hereinafter, the processing procedure will be sequentially described with reference to FIG.

The NC data creation operator selects and specifies the two-dimensional CAD drawing displayed on the display device 2 of FIG.

Returning again to FIG. 2, the next step S201
Then, the tool information to be used for the machining target area selected in step S200 is registered in the machining definition file (the machining definition file is set). An example of registering this tool information is shown below.

Target tool diameter φ8 mm Virtual tool diameter for point contact φ16 mm Machining conditions for point contact machining “Cutting amount (△ Z, XY), feed speed, rotation speed” Cutting amount (△ Z5 mm, XY4 mm), feed speed 2000
mm / min, number of rotations 8000 pm Processing conditions when point contact is not possible "Cutting amount (△ Z, XY),
Feeding speed, number of revolutions ”Cutting amount (△ Z1mm, XY4mm), Feeding speed 1000
mm / min, number of revolutions 8000 pm Small diameter tool diameter for uncut machining φ4 mm Processing condition of small diameter tool “Cutting amount (△ Z, XY), feed speed, rotation speed” Cutting amount (△ Z1 mm, XY2 mm), feed speed 1000
0 mm / min, number of revolutions 12000 pm In the above example, the machining conditions for point contact machining have a difference of 5 times in cutting amount △ Z and 2 times in feed speed as compared with machining conditions when point contact is not possible. become. By optimizing the conditions at the processing part, the point contact processing part can set the conditions of high efficiency processing up to 5 × 2 = 10 times at the maximum.

Incidentally, it is also possible to register the tool diameter and the respective machining conditions in a tool file or the like in advance, and to select data therefrom.

Next, in step S202, a high-efficiency machining area is created using the virtual tool diameter (the above-mentioned φ16 mm in the illustrated example).

An example of the procedure for creating the high-efficiency machining area is as follows.
This will be described with reference to FIG. In the same figure, e1 to e5 are contour elements that become the walls of the processing target area. First, this contour element is equivalent to half the virtual tool diameter (8 mm in the illustrated example).
Offset processing to the inside of the processing target area, and f1 to f
The figure examples up to 5 are obtained. In these figures, f2 to f
Since the portion where the twist is generated in the graphic examples up to 5 is a portion having a smaller interval than the offset amount, a graphic example in which this portion is deleted is obtained. The graphic example of f1'-f2'-f5 'in FIG. 5 corresponds to this. This corresponds to a tool center locus when the processing target area is processed with the virtual tool diameter. Contour shapes g1 to g4 when machining with a virtual tool diameter are obtained based on the graphic examples f1'-f2'-f5 'shown in FIG.

The area constituted by the contour shape is a high-efficiency processing area. A4 in FIG. 6 is a high-efficiency processing area in the illustrated example.

Returning again to FIG. 2, the next step S203
Then, tool trajectory data for the focused tool diameter (the above-mentioned φ8 mm in the illustrated example) for the high-efficiency machining area is created. This can be determined by offsetting g1 to g4 in FIG. 7 by half of the focused tool diameter (4 mm in the illustrated example). The tool trajectory is the element row of h1, but it can be seen that the tool trajectory also satisfies the point contact condition for the virtual tool radius (8 mm) even at the inner corner.
In addition, the tool path is such that the tool is prevented from entering the groove.

Next, in step S204, an area excluding the high-efficiency processing area from the processing target area is extracted as the uncut area 1. This corresponds to the areas A5 and A6 in FIG. Next, in step S205, it is determined whether or not the uncut area 1 exists. If it is determined that there is no uncut area 1, it is determined that all machining has been completed based on the high-efficiency machining tool trajectory data, and the processing operation ends.

On the other hand, if it is determined in step S205 that there is an uncut area 1, the process proceeds to the next step S206, and the target tool diameter (the above-mentioned φ8 mm in the illustrated example) is set for the uncut area 1. Create a tool path for. This can be created in the same procedure as in step S203 by offsetting the wall elements in the areas A5 and A6 in FIG. 6 by half (4 mm) of the focused tool diameter. H2 and h3 in FIG. 8 are respective tool trajectories for the uncut areas A5 and A6.

Next, in step S207, an uncut area 2 is obtained from the uncut area 1 excluding the portion (processed area) processed in step S206. The uncut area 2 is A7 in FIG. 8 in the illustrated example.

Next, in step S208, it is determined whether or not the uncut area 2 obtained in step S207 exists. Then, when it is determined that there is no uncut area 2, it is determined that all machining has been completed with the focused tool diameter, and the processing operation ends.

On the other hand, if it is determined in step S208 that the uncut area 2 is present, then in step S209, the specified small-diameter tool (φ4 mm in the illustrated example) is targeted for the uncut area 2. Create a tool path. This can be created in the same procedure as in step S203 by offsetting the wall element in the area A7 in FIG. 8 by the radius (2 mm) of the focused tool diameter. H4 in FIG. 9 is an example of the small-diameter tool path with respect to the area A7.

After the processing of step S209 is completed,
This processing operation ends.

According to the above order, high-efficiency machining (point contact) at the focused tool diameter → normal machining (extracting a portion where point contact is impossible) →
It is possible to automatically create NC data that can efficiently process a workpiece including grooves and inner corner shapes in the order of machining with a small-diameter tool (extracting the inaccessible part of the target tool diameter). it can.

The CAD data creation apparatus according to the present embodiment realizes the above-described functions of the present embodiment by reading and executing the control program stored in the storage medium 103 by a computer. However, the present invention is not limited to this, and the OS running on the computer based on the instruction of the control program
It goes without saying that a part or all of actual processing such as (operating system) is performed, and the functions of the present embodiment described above are realized by the processing.

[0060]

As described above in detail, according to the NC data generating method and apparatus of the present invention, the processing target which needs to change the tool diameter and the processing conditions for each processing portion such as a groove portion or an inner corner portion. A simple processing method designation method can be applied to an object, and the efficiency of NC data creation work can be improved. In addition, it is possible to reduce mistakes in the designation of the processing method and the like, and to enhance the reliability of the NC data. Therefore, even relatively inexperienced workers can create the NC data. In addition, since high-efficiency processing conditions can be set in a portion that satisfies the point contact by using the same tool, the processing efficiency is dramatically improved.

According to the storage medium of the present invention, the above-described NC data generating apparatus of the present invention can be smoothly controlled.

[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 the NC data creation device according to one embodiment of the present invention.

FIG. 3 is a diagram showing an example of a part drawing of an object to be processed to which the NC data creating apparatus according to one embodiment of the present invention is applied;

FIG. 4 is a diagram showing an example of creating a center locus of a virtual tool in the NC data creating device according to one embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of creating a high-efficiency machining area in the NC data creating apparatus according to one embodiment of the present invention.

FIG. 6 is a diagram showing an example of creating an uncut area 1 in the NC data creating apparatus according to one embodiment of the present invention.

FIG. 7 is a diagram showing an example of creating a tool trajectory of a point contact condition in the NC data creating device according to one embodiment of the present invention.

FIG. 8 is a diagram showing an example of forming a tool trajectory of a portion having no point contact in the NC data creating device according to one embodiment of the present invention.

FIG. 9 is a diagram illustrating an example of creating a tool path for machining the uncut area 2 with a small-diameter tool in the NC data creating apparatus according to one embodiment of the present invention.

FIG. 10 is a diagram showing an example of a tool path of point contact machining in a conventional NC data creation device.

FIG. 11 is a diagram showing an example of a tool trajectory that does not satisfy a point contact condition that poses a problem in a conventional NC data creation device.

FIG. 12 is a diagram showing an example of creating NC data by dividing a region in a conventional NC data creating apparatus.

[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 103 Storage medium

Claims (24)

[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
(roll: numerical control) In the NC data creation method for creating data, a tool diameter designation step of designating a diameter of a tool to be used in actual machining and a diameter of a virtual tool having a diameter larger than the diameter of the tool to be used; Using the diameter of the tool, in the diameter of the used tool, a condition in which the thickness (cutting amount) for removing the workpiece does not exceed the cutting amount set as a processing condition in the used tool (hereinafter referred to as a point contact condition) Do)
NC comprising: a workable range determining step of determining a workable range in which processing is possible while satisfying the following conditions: and a tool trajectory creating step of creating a tool trajectory with the diameter of the used tool with respect to the workable range. Data creation method. 2. An uncut portion extraction step for extracting a portion excluding the workable range from the shape of the object to be processed as an uncut portion, and a tool that can enter the uncut portion with a diameter of the tool used. 2. The method according to claim 1, further comprising an intrudable part extracting step of extracting a part, and a second tool path creating step of creating a tool path in which a machining condition of a tool is changed for the intrudable part. NC data creation method. 3. A second tool diameter designation step of designating a diameter of a tool smaller than the diameter of the tool to be used with respect to the uncut area, and the uncut area by a tool having a diameter smaller than the diameter of the used tool. 3. The NC data creating method according to claim 2, further comprising a third tool trajectory creating step of creating a tool trajectory for machining the range. 4. A registration step of pre-registering the diameter of the used tool, the diameter of the virtual tool, the diameter of the tool smaller than the diameter of the used tool, and the processing conditions of the tool in a file, and NC data according to the file. 4. An NC data creating method according to claim 1, further comprising: an NC data creating step of creating the NC data. 5. The NC data creating method according to claim 2, wherein the machining conditions of the tool are a cutting amount, a feed speed, and a rotation speed of the tool. 6. 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
a tool diameter designating means for designating a diameter of a tool to be used in actual machining and a diameter of a virtual tool having a diameter larger than the diameter of the tool to be used in the NC data creating apparatus for creating data. Using the diameter of the tool, the thickness (cutting amount) at which the workpiece is removed at the diameter of the tool used
A workable range determining means for determining a workable range that can be machined by satisfying a condition (hereinafter, referred to as a point contact condition) not exceeding a cutting amount set as a machining condition for the tool to be used; An NC data creation device, comprising: tool path creation means for creating a tool path with the diameter of the used tool for a range. 7. An uncut area extracting means for extracting a portion excluding the workable area from the shape of the object to be processed as an uncut area, and a tool which can enter the uncut area with the diameter of the tool used. 7. An intrudable part extracting means for extracting a part, and a second tool trajectory creating means for creating a tool trajectory in which tool machining conditions are changed for the intrudable part. NC data creation device. 8. A second tool diameter designating means for designating a diameter of a tool smaller than the diameter of the used tool with respect to the uncut area, and a tool having a smaller diameter than the diameter of the used tool. 8. The NC data creating apparatus according to claim 7, further comprising third tool trajectory creating means for creating a tool trajectory for machining the range. 9. Registering means for registering in advance a diameter of the used tool, a diameter of the virtual tool, a diameter of a tool smaller than the diameter of the used tool, and machining conditions of the tool in a file, and NC data according to the file. 9. An NC data creating apparatus according to claim 6, further comprising: NC data creating means for creating the NC data. 10. The NC data creation apparatus according to claim 7, wherein the machining conditions of the tool are a cutting amount, a feed speed, and a rotation speed of the tool. 11. A CAD (Computer Aided Desert) 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 which stores a control program for controlling an NC data creating apparatus for creating data and which is readable by a computer, wherein the control program includes a diameter of a tool used in actual machining. A tool diameter specifying module for specifying the diameter of a virtual tool having a diameter larger than the diameter of the used tool; and a thickness (cutting amount) for removing a workpiece at the diameter of the used tool using the diameter of the virtual tool. A workable range determination module that determines a workable range that can be machined by satisfying a condition (hereinafter, referred to as a point contact condition) that does not exceed a cutting amount set as a machining condition for the tool to be used; A tool trajectory creation module for creating a tool trajectory with a diameter of the used tool for a range. 12. The unremoved range extraction module for extracting a part excluding the workable range from the shape of the workpiece as the unremoved range, the control program includes:
A second intrusion part extraction module for extracting a part that can enter with the diameter of the tool in use with respect to the uncut portion, and a second tool path that creates a tool trajectory in which a machining condition of the tool is changed with respect to the part that can enter. The storage medium according to claim 11, further comprising a tool path creation module. 13. The control program according to claim 1, further comprising: a second tool diameter designation module for designating a diameter of the tool smaller than the diameter of the tool to be used for the uncut area, and a module having a diameter smaller than the diameter of the tool to be used. 13. The storage medium according to claim 12, further comprising: a third tool path creation module for creating a tool path for machining the uncut area with a tool. 14. A registration module for registering in advance a diameter of the used tool, a diameter of the virtual tool, a diameter of a tool smaller than the diameter of the used tool, and machining conditions of the tool in a file, N according to the file
14. The storage medium according to claim 11, further comprising an NC data creation module for creating C data. 15. The storage medium according to claim 12, wherein the processing condition of the tool is a cutting amount, a feed speed, and a rotation speed of the tool. 16. The storage medium according to claim 11, wherein the storage medium is a floppy disk.
The storage medium according to the above. 17. The storage medium according to claim 11, wherein the storage medium is a hard disk. 18. The storage medium according to claim 11, wherein the storage medium is an optical disk. 19. The storage medium according to claim 11, wherein the storage medium is a magneto-optical disk. 20. The storage medium according to claim 1, wherein the storage medium is a CD-ROM (Co-ROM).
mpact Disk Read Only Memo
The storage medium according to claim 11, wherein the storage medium is ry). 21. The storage medium is a CD-R (Comp)
16. The storage medium according to claim 11, wherein the storage medium is an act disk recordable. 22. The storage medium according to claim 11, wherein the storage medium is a magnetic tape. 23. The storage medium according to claim 11, wherein the storage medium is a nonvolatile memory card.
5. The storage medium according to 5. 24. The storage medium according to claim 1, wherein the storage medium is a ROM (Read
The storage medium according to claim 11, wherein the storage medium is an only memory (chip) chip.