JP2001312308A - Numerical control data preparing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To speedily and easily prepare the numerical control(NC) data of works having various three-dimensional(3D) forms. SOLUTION: Surface information containing the expression formula of a surface expressing the form of the work and the expression formula of the contour of the surface is fetched from 3D CAD data concerning the work. The individual fetched expression formulas of the contours of surfaces are mutually compared and when both formulas are coincident, junction relation information showing the junction of two surfaces as a rigid line is prepared. The junction relation information is collated with the previously registered junction relation information of the surface of a standard model in a working form and when both the information are coincident, the surface is set as a working part. From a previously registered working information preparation procedure and a working information parameter set for each standard model of the working form, the working information of the set working part is prepared. Therefore, the NC data of works having various 3D forms can be speedily and easily prepared while using the 3D CAD data of the work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preparing numerical control data for preparing numerical control data for processing a workpiece by a numerically controlled machine tool.

[0002]

2. Description of the Related Art In a conventional numerical control data generating method, a standard model of a machining shape in which machining information is defined in advance is arranged, so that machining information prepared for each standard model of the arranged machining shape is prepared. Follow the steps for creating
Numerical control data for processing the processed portion (processed shape) has been automatically created using a computer device. For example, as shown in FIG. 85, considering a cylindrical hole H having an open surface on one side and a cylindrical boss B projecting to the outside as a standard model of a processing shape, the processing method of each standard model is as follows. Machining part corresponding to (hatched part)
There is a processing method of removing the material from the material, and a processing method of removing the area around the part corresponding to the boss B from the material. By selecting a standard model, the numerical control data by the processing method corresponding to each standard model is automatically created Was to be done.

[0003]

In the case where the target machining shape is represented by the overlap of the standard model, for example, as shown in FIG. 86, a cylindrical boss B is formed at the center of the bottom of the cylindrical hole H '. In the case of a machined shape where 'is protruding, desired numerical control data may not be obtained with the above-described conventional method.
Therefore, the creator who creates the shape of the workpiece has to create the shape of the workpiece under many restrictions so that the numerical control data can be obtained correctly.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide numerical control data capable of quickly and easily creating numerical control data of workpieces having various three-dimensional shapes. It is to provide a creation method.

[0005]

According to the first aspect of the present invention, there is provided a numerical control data generating method for generating numerical control data for processing a workpiece by a numerically controlled machine tool. , 3D CAD for workpieces
The first processing for capturing the surface information including the expression of the surface representing the shape of the workpiece and the expression of the outline of the surface from the data, and the expression for the captured outline of each surface are compared with each other. A second process of creating joining relation information indicating that the two faces are joined with the contour as a ridge line when they match, and using the joining relation information as a surface of a standard model of a machining shape registered in advance. A third process of setting the part as a processing part when the two are matched with each other, and a processing information creation procedure registered in advance and a processing set for each standard model of the processing shape. And a fourth process for creating machining information of the machining area set according to the information parameter. The numerical processing of the workpiece having various three-dimensional shapes using the three-dimensional CAD data of the workpiece. Data it is possible to create quickly and easily. In addition, restrictions in creating the shape of the workpiece are reduced, and the three-dimensional shape of the workpiece can be created without being conscious of the processing method or the like.

According to a second aspect of the present invention, in the first aspect of the present invention, in the second processing, a number assigned to each surface,
It is characterized in that the information on the expression of each surface, the list of the numbers of the surfaces to be joined to each surface, the information on the expression of the ridge line to be joined, and the joining angle information of the two surfaces to be joined are expressed by the joining relationship information, The same operation as that of the first aspect is achieved.

According to a third aspect of the present invention, in the first aspect of the invention, in the second processing, the surface information of the material having a surface expression formula and a surface contour expression formula representing the material shape before machining is obtained. The method is characterized in that only the connection relation information of the surface of the workpiece located below the surface information of the material is taken as the processing target after the third processing, and the processing is performed after the third processing. The processing target can be reduced,
Processing can be reduced.

According to a fourth aspect of the present invention, in the first aspect of the present invention, when the surface representing the shape of the workpiece taken in the first processing is a free-form surface, the surface is uniformly formed at a predetermined interval on the surface. The z-component of the generated normal vector of the point group collects the above-mentioned point group within a predetermined range, and adds a portion obtained by dividing the surface at the boundary of the point group to a processing target after the second processing. As a feature, processing information according to the inclination angle of the free-form surface can be created.

According to a fifth aspect of the present invention, in the first aspect of the present invention, prior to the second processing, the expressions of the contours of the respective surfaces of the workpiece are compared, and adjacent expressions having the same expression are obtained. The surface information of the workpiece is recreated by grouping a plurality of contours. The number of processing targets after the second process can be reduced, and the number of processes can be reduced.

According to a sixth aspect of the present invention, in the first aspect of the present invention, in the second processing, expressions of each surface of the workpiece are compared, and a plurality of adjacent surfaces having the same expression are compared. Is characterized by re-creating the joint relationship information of the surface of the workpiece by grouping the objects, and the number of processing targets after the third processing can be reduced, and the processing can be reduced.

According to a seventh aspect of the present invention, in the sixth aspect of the invention, in the grouping, an arbitrary surface is set as a reference surface, and a surface which is in a joining relationship with the reference surface is set as a comparison target surface, and the two surface information are compared. And, when the above-mentioned comparison target surface is grouped with the reference surface when they are adjacent with the same expression,
The comparison target surface is newly set as a reference surface, and surface information is compared between the reference surface and the comparison target surface in a joining relationship to search for a surface that can be grouped. Can be speeded up.

According to an eighth aspect of the present invention, in the first aspect of the invention, before the third processing, the pre-registered joining relation information having a shape irrelevant to the creation of the machining information is combined with the joining of the workpiece. It is characterized in that it is searched for and deleted from the relation information, and the connection relation information of the workpiece is recreated. The number of processing targets after the third processing can be reduced, and the processing can be reduced.

According to a ninth aspect of the present invention, in the first aspect of the present invention, before the third processing, the z component of the normal vector is within a predetermined range based on the joint relation information and is in a joint relation with each other. The method is characterized in that a plurality of surfaces are grouped to define an inclined surface of the workpiece, and complicated joint relationship information can be simply expressed.

According to a tenth aspect of the present invention, in the ninth aspect of the present invention, when each of the surfaces belonging to the group of the two adjacent inclined surfaces is in a valley bent state at an angle within a predetermined range, the joining is performed. It is characterized in that the ridge line of the portion is set as a valley shape, and complicated joint relation information can be simply expressed.

According to an eleventh aspect of the present invention, in the first aspect of the present invention, before the third processing, a plurality of z-components of the normal vector are zero based on the joint relation information and are in a joint relation with each other. Planes are grouped as vertical planes, and when the horizontal plane in which the x component and the y component of the normal vector are zero and the plurality of grouped vertical planes are in a valley-bent joint state, the horizontal plane is processed into the processing region. Is set, and complicated joint relation information can be simply expressed.

According to a twelfth aspect of the present invention, in the first aspect of the present invention, in the fourth processing, the processing step procedure information indicating the processing order of the processing information parameter is processed by the processing set in the third processing. Determining a processing step that matches the shape of the workpiece by collating with the part, calculating a processing information parameter of the determined processing step, and simultaneously creating a shape in the processing step; Parameters can be created simultaneously and automatically.

According to a thirteenth aspect of the present invention, in the twelfth aspect of the invention, when there are a plurality of the same processing parts and the processing step for each of the processing parts is set in the processing step procedure information, It is characterized in that the processing step procedure information is extended by the number of pieces, and efficient processing can be realized.

According to a fourteenth aspect of the present invention, in the case of the thirteenth aspect, when a plurality of machining methods for a machining portion are set in the machining process procedure information, the evaluation indices of the respective machining methods are compared with each other to determine an optimal evaluation. A processing method having an index is selected, and efficient processing can be realized.

According to a fifteenth aspect, in the fourteenth aspect, the evaluation index is a machining time required for machining, and the machining time is calculated in a pseudo manner using the range of the machining part and machining information parameters. And has the same effect as the invention of claim 14.

According to a sixteenth aspect, in the fourteenth aspect, the evaluation index is a machining cost required for machining, and the machining cost is pseudo-calculated using the range of the machining part and the machining information parameter. And has the same effect as the invention of claim 14.

According to a seventeenth aspect, in the fourteenth aspect, the evaluation index is used as a cost of a tool used for machining.
The tool cost is simulated by using the range of the processing part and the processing information parameter, and the same effect as the invention of claim 14 is exerted.

The invention of claim 18 is the invention of claim 14, wherein the evaluation index is a load of a tool used for machining,
The tool load is pseudo-calculated using the range of the processing part and the processing information parameter, and the same effect as the invention of claim 14 is exerted.

According to a nineteenth aspect of the present invention, in the twelfth aspect, the interference between the tool used for machining and the shape in the machining process is analyzed for each machining process, and the tool and the machining process are determined based on the analysis result. Is characterized by avoiding interference with the shape in the above, and efficient machining can be realized by avoiding interference between the tool and the shape in the machining step.

According to a twentieth aspect, in the nineteenth aspect, a plurality of types of tools used for the same machining are prepared, and a tool that does not interfere with the shape in the machining process is selected and used based on the analysis result. As a feature, more efficient processing can be realized.

According to a twenty-first aspect of the present invention, in the twentieth aspect, information of the plurality of types of tools is registered in a database in advance, and the shape in the machining step is determined using information of each tool sequentially read from the database. And a tool that does not interfere is selected based on the result of the verification. The same operation as the twentieth aspect of the invention is achieved.

According to a twenty-second aspect of the present invention, in the twentieth aspect, the amount of interference of each of the tools with the shape in the machining step is derived, and the mounting length of the tool to the numerically controlled machine tool is determined in accordance with the derived amount of interference. Is adjusted, and the same operation as the twentieth aspect of the invention is achieved.

According to a twenty-third aspect, in the twenty-second aspect, information of the plurality of types of tools is registered in a database in advance, and any one of the plurality of types of tools is used as a temporary use tool. The amount of interference between the selection and the temporary use tool and the shape in the above-mentioned machining process is derived, and the interference amount is added to the outer dimensions of the temporary use tool based on the information of each tool registered in the database. Selecting tools with external dimensions that are not small,
The same operation as that of the twenty-second aspect is achieved.

According to a twenty-fourth aspect of the present invention, in the twenty-second aspect of the present invention, any one of the plurality of types of tools is selected as a temporary use tool, and interference between the temporary use tool and the shape in the machining step. The amount of interference is derived, and the amount of interference is added to the outer dimensions of the temporary tool to calculate the length of attachment of the tool to the numerically controlled machine tool. The same effect as the invention of claim 22 is achieved. .

According to a twenty-fifth aspect of the present invention, in the twentieth aspect of the present invention, an interference portion with the shape of each of the tools in the machining step is derived, and a tool mounting portion for the numerically controlled machine tool is determined according to the derived interference portion. The diameter is adjusted, and the same operation as the twentieth aspect is achieved.

According to a twenty-sixth aspect of the present invention, in the invention of the twenty-fifth aspect, information of the plurality of types of tools is registered in a database in advance, and any one of the plurality of types of tools is used as a temporary use tool. Select and derive an interference part between the temporary tool and the shape in the above-mentioned processing step, and determine a mounting part diameter capable of avoiding interference based on the information of the interference part and the information of each tool registered in the database. A tool having the same function as that of the twenty-fifth aspect is selected.

According to a twenty-seventh aspect of the present invention, in the twenty-fifth aspect of the present invention, any one of the plurality of types of tools is selected as a temporary use tool and interference between the temporary use tool and the shape in the machining step. A part is derived, and a diameter of a mounting part capable of avoiding interference is calculated using information on the interference part, and the same effect as the invention of claim 25 is achieved.

According to a twenty-eighth aspect of the present invention, in the twentieth aspect, the amount of interference of each of the tools with the shape in the machining step is derived, and the mounting length of the tool to the numerically controlled machine tool is determined in accordance with the derived amount of interference. While adjusting the, to derive the interference site with the shape of the above tools in the above machining process,
3. The method according to claim 2, wherein a diameter of a mounting portion of the tool to the numerically controlled machine tool is adjusted according to the derived interference portion.
0 has the same effect as the invention.

According to a twenty-ninth aspect, in the nineteenth aspect, each of the processing steps is divided into a plurality of sub-processing steps,
A tool capable of avoiding interference is selected for each sub-machining step, so that more efficient machining can be realized.

According to a thirtieth aspect of the present invention, in the twenty-third aspect of the present invention, in each of the machining steps, a depth capable of machining by avoiding interference with one type of tool is calculated, and the machining step performed by the one type of tool is performed. Is defined as one sub-machining step, and has the same effect as the invention of claim 29.

According to a thirty-first aspect of the present invention, in the invention of the twenty-ninth aspect, information on a plurality of types of tools having different workable depths is registered in a database in advance, and is registered in the database in each of the above-mentioned machining steps. One of multiple types
Calculate the depth that can be processed by avoiding interference with different types of tools,
The machining process performed with the one type of tool is defined as one sub-machining process, and one of a plurality of types of tools registered in the database for each sub-machining process until a desired machining depth is reached. 2. The method according to claim 2, wherein
The same effect as that of the ninth invention is exerted.

According to a thirty-second aspect of the present invention, in the thirty-first aspect, a machining distance that can be machined by the one kind of tool is calculated, and if the machining distance exceeds a limit value, another kind of tool is stored in a database. And has the same effect as the thirty-first aspect.

In a thirty-third aspect of the present invention, in the thirty-first aspect, a tool load that can be machined by the one type of tool is calculated, and if the tool load exceeds a limit value, another type of tool is stored in a database. And has the same effect as the thirty-first aspect.

According to a thirty-fourth aspect, in the nineteenth aspect, a plurality of types of tools used for the same machining are prepared, and a tool that does not interfere with the shape in the machining process is selected and used based on the analysis result. It is characterized in that each of the above-mentioned machining steps is divided into a plurality of sub-machining steps, and a tool capable of avoiding interference is selected for each of the sub-machining steps, whereby more efficient machining can be realized.

According to a thirty-fifth aspect of the present invention, in the first aspect, there is provided a fifth step of interactively confirming a process procedure included in the processing information and a processing information parameter in each step. , Numerical control data can be created more accurately.

According to a thirty-sixth aspect of the present invention, in the thirty-fifth aspect, in the fifth process, the shape of the work-in-process of the workpiece is pseudo-created for each of the steps and displayed stepwise. As a feature, the processing result can be grasped three-dimensionally.

According to a thirty-seventh aspect, in the thirty-sixth aspect, the shape of the workpiece is compared with the shape of the workpiece.
It is characterized in that a shape model of only the unprocessed portion in the work-in-progress is created and displayed, and the unprocessed portion can be easily grasped.

[0042]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIG. 2 is a functional block diagram of a numerical control data creating apparatus used to carry out the method of the present invention. This numerical control data creating apparatus reads CAD from three-dimensional CAD data of a workpiece created by a CAD device (not shown), and acquires surface information including a surface expression representing the shape of the workpiece and a surface contour expression. The data capturing means 1 is compared with the expression formula of the contour of each of the captured surfaces, and when both match, jointing information is created which indicates that the two surfaces are joined with the contour as an edge. The relation information creating means 2 compares the created joint relation information with the joint relation information of the surface of the standard model of the machining shape registered in advance, and when both match, a collation for setting the corresponding part as a machining part Means 3,
A database 4 in which standard models of machining shapes are registered;
A machining information creating means 5 for creating machining information of the set machining portion according to machining information creating procedures registered in advance in the database 4 and machining information parameters set for each standard model of the machining shape; And display means 6 for displaying various information of the workpiece including the above. It should be noted that the numerical control data creation device having such a configuration can be realized using a general-purpose computer device (such as a personal computer).

Next, the operation of the numerical control data generating apparatus, that is, the numerical control data generating method of the present invention will be described with reference to the flowchart of FIG.

First, surface information is fetched from the three-dimensional CAD data of the workpiece by the CAD data fetching means 1 (process 1). Here, the surface information includes a surface expression formula represented by a three-axis orthogonal coordinate system, a surface normal vector (an average value in the case of a curved surface), an area, an outer contour length, and the number of inner contours. , The minimum radius of curvature for a curved surface, and the like.

Then, the joining relation information creating means 2 sends the CAD
Based on the surface information fetched by the data fetching means 1, joint relation information is created according to the flowchart shown in FIG. 3 (Process 2). For example, taking a cubic workpiece W as shown in FIG. 4 as an example, information on the six surfaces a to f of the workpiece W is represented by C
After being captured by the AD data capturing unit 1, the expression fm (x, y,
z) are sequentially collated with the expression gn (x, y, z) of the four contours of the surface to be collated (for example, surface d) (m, n = 1, 2, 2).
3, 4) when two expressions are the same (fm (x,
(y, z) = gn (x, y, z)), and a joining relationship is set between the matching surface a and the matching surface d. Here, if a graph is used to display such a joint relationship in a visually easy-to-understand manner, and vertices of the graph are surfaces a to f and edges of the graph are ridges, for example, the joint of two surfaces a and d is obtained. The relationship can be represented as shown in FIG. If such processing is performed for all the surfaces a to f, a data table showing the correspondence between the surfaces a to f and the surface numbers to be joined as shown in FIG. 5 can be created.

For example, a work W having a square hole (hereinafter, referred to as a square hole) H in the center of one surface (upper surface) a of a parallelepiped as shown in FIG. The outer contour of W is represented as the left half in the graph of FIG. 6B from the joining relationship between the surfaces a to f and the ridge line of each surface a to f,
The inner contour (square hole H) of the workpiece W is shown in the graph of FIG. 6B based on the joining relationship between the surface a and the bottom surface g of the square hole H, and the inner peripheral surface gk and the ridge line of each surface gk. It is represented as the right half.

On the other hand, in the database 4, a standard model of the machining shape, a graph representing the joint relationship between the surfaces of the standard model, and machining information parameters of the standard model are registered in a table format in advance. For example, the square hole H is also one of the standard models, and a graph and processing information parameters corresponding to the square hole H are stored in a table format as shown in FIG. Here, the machining information parameters include a machine tool (machine A) used for machining the standard model (square hole H), a tool name (HSS), the number of tool blades (2), a tool diameter (φ10), and the like. .

Subsequently, the collating means 3 uses the joining relation information of the surface of the workpiece W created by the joining relation information creating means 2 as described above, with respect to the surface of the standard model of the machining shape registered in advance in the database 4 as described above. It is collated with the joining relation information by pattern matching or the like (process 3 in FIG. 1). In the above example, FIG.
When the graph of the workpiece W is compared with the graph of the standard model of the square hole H (see FIG. 7), the graph on the right half of the workpiece W matches the graph of the standard model of the square hole H as shown in FIG. 8, the part that matches as shown in FIG.
(The hatched area in).

Next, the processing information creating means 5 applies the processing information creation procedure registered in advance in the database 4 and the processing information set for each standard model of the processing shape to the processing part set by the collating means 3. Based on the parameters, the processing information of the set processing part is created (Process 4 in FIG. 1). That is, the processing information creating unit 5 determines the processing step that matches the shape of the workpiece W by comparing the processing step information indicating the processing order of the processing information parameter with the set processing part. A shape in the processing step is created at the same time as calculating the processing information parameter of the processing step.

More specifically, as shown in the flowchart of FIG. 9, the processing information creating means 5 captures the processing step procedure information registered in the database 4 and captures the data of all the processing parts of the workpiece W. The acquired data of the processing part is collated with the data of the processing shape of the processing procedure information, and when the two match, the data of the processing part is newly registered in the database 4 as the processing step information for the workpiece W, This collation / registration processing is repeated by the amount corresponding to the processing step procedure information to re-create the processing step procedure information. Continuing with FIG.
As shown in the flowchart of FIG.
The processing procedure information for the workpiece W registered in the database 4 is fetched, and the type of the parameter included in the processing procedure information is determined. If the parameter is a fixed value or an input value by an operator, the value is output as a processing information parameter, and if the parameter depends on the shape of the processing portion, an appropriate value is calculated from the shape range to perform processing. Output as information parameters, or read the master file (not shown) corresponding to the tool, material or machine tool if the parameter depends on either the tool or material or machine tool, and read the read master file (Information on a tool or material to be used or a machine tool optimal for processing) is extracted from the data and output as a processing information parameter, and this is repeated by the amount corresponding to the processing step information for the workpiece W. Thereby, a processing information parameter is created.

Further, as shown in the flow chart of FIG. 11, the processing information creating means 5 captures the shape of the workpiece W, captures the processing information parameters, and uses the tool shape of the processing information parameter to convert the raw material of the workpiece W. A machining amount (for example, represented by a moving amount of the tool along the z-axis of the orthogonal coordinate system) for approximating the shape is calculated, and a shape model (three-dimensional model) in the machining process of the workpiece W is calculated using the calculated machining amount. Model). Further, when a shape model M as shown in FIG. 13 is created for the machining process procedure information shown in FIG. 12A, as a result of the shape information If it is confirmed that there is no machining shape, machining process procedure information is created by deleting unnecessary machining information parameters related to square holes from the machining process procedure information (see FIG. 12B). In this way, as shown in FIGS. 14 and 15, the processing information creating means 5 converts the processing information parameter file in which the names of the parameters and the conditions for determining the parameters are arranged as necessary for the processing to the processing shape. The processing information parameters are created for each standard model, and the processing information parameters are combined into one to create a processing information parameter file indicating all processing procedures for the workpiece W and registered in the database 4.

Further, the processing information creating means 5 has a function of interactively confirming the created process procedure and the processing information parameters in the process with an operator (process 5 in FIG. 1). That is, as shown in the flowchart of FIG. 16, the processing information creating means 5 determines the processing information after selecting the processing method, calculates the value of the z coordinate of the final processing shape of the workpiece W, and calculates the calculated z value and the processing value. Create machining shape data based on the information. Then, based on the processed shape data, the screen of the display means 6 such as a display device is displayed on the screen shown in FIGS.
As shown in (d), the shape of the work-in-progress of the workpiece W in each processing step (hereinafter, referred to as a process shape) is displayed step by step,
An operator (operator) can three-dimensionally confirm a process shape in each processing step of the workpiece W.

The processing information (numerical control data) finally confirmed is transmitted from the numerical control data generating device to the numerical controller of the numerically controlled machine tool online or recorded on a floppy disk or tape. Given through the medium.

As described above, according to the present embodiment, numerical control data of a workpiece having various three-dimensional shapes can be quickly and easily created using the three-dimensional CAD data of the workpiece. In addition, restrictions in creating the shape of the workpiece are reduced, and the three-dimensional shape of the workpiece can be created without being conscious of the processing method or the like.

When the shape of the workpiece W is represented by a graph, it may not be possible to accurately represent the shape of the workpiece W by simply using only the joining relation. For example, as shown in FIG. 18, a workpiece W1 having a rectangular hole H on the upper surface a of a rectangular parallelepiped and a workpiece W2 having a rectangular pillar P protruding from the upper surface a of the rectangular parallelepiped are represented by the same graph. Can not be distinguished. Therefore, each surface a to k
Are given as attributes to the sides of the graph, the shapes of the workpieces W1 and W2 are identified and represented. be able to. More specifically, a sign of (+) for so-called mountain break and a sign of (-) for valley break are added to the surface number list as an attribute as a joining angle, or the inside and outside of the contour ( FIG. 19A is referred to as an outer contour, and FIG. 19B is referred to as an inner contour. Accordingly, since the workpiece W1 is represented as shown in FIG. 20 and the workpiece W2 is represented as shown in FIG. 21, it is possible to easily identify the two and accurately represent the shapes of the workpieces W1 and W2. Becomes Note that an average value may be used as the joining angle when the ridgeline is a curve.

Further, as shown in FIG.
W2 from which a square pillar P protrudes, and the upper surface a of the rectangular parallelepiped
W from which the column body P 'whose side surface HK is inclined protrudes from
3 and 3 cannot be distinguished because they are represented by the same graph. Therefore, if the surface characteristics of each of the surfaces a to k (expressions of the surfaces, normal vectors and areas of the surfaces, etc.) are given to the vertices of the graph as attributes, the above-described workpiece W2,
The shape of W3 can be identified and represented. In particular,
The attribute (V) of the vertical surface is given to the surface number when the angle to the surface to be joined is 90 degrees, and the attribute (θ) of the inclined surface to the surface number when the angle to the surface to be joined is not 90 degrees. Therefore,
Since the workpiece W2 is represented as shown in FIG. 23 and the workpiece W3 is represented as shown in FIG. 24, it is possible to easily identify the two and accurately represent the shapes of the workpieces W2 and W3. . Note that an average value may be used as a normal vector when the surfaces a to k are curved surfaces.

(Embodiment 2) This embodiment corresponds to Embodiment 1.
In process 2, the surface information of the material having the expression of the surface representing the material shape before processing and the expression of the contour of the surface is fetched from the three-dimensional CAD data, and the surface of the workpiece located below the surface information of the material is captured. It is characterized in that only the surface connection relation information is a processing target after the processing 3, and the other processing and the configuration of the numerical control data creating apparatus are the same as those in the first embodiment, so that illustration and description are omitted.

The processing which characterizes the present embodiment will be described with reference to the flowchart of FIG. 25 and FIG. First,
The CAD data capturing means 1 converts the surface information of the shape of the material G before processing and the surface information of the shape of the workpiece W after processing into CAD.
Read from device. Then, the z-coordinate of the surface of the workpiece W (hereinafter referred to as the collation surface) and the surface of the shape of the material G before machining (hereinafter referred to as the “coordinate”).
The z-coordinate of the surface to be collated is compared by the joining relationship information creating means 2, and if the z-coordinate of the surface to be collated is smaller than the z coordinate of the surface to be collated, the collating surface is created. It is set as a processing target, and if not smaller, the matching surface is excluded from the processing target. For example, as shown in FIG. 26, when a plurality of round holes H1 are provided on the surface b of the workpiece W and a square hole H2 is provided on the surface d, the z coordinate of each of the surfaces b and d of the material G is On the other hand, the round hole H1 of the workpiece W
And the z-coordinates of the bottom surfaces b ′ and d ′ of the square hole H2 are reduced, and the workpieces W and the material G
And make the z coordinate equal. Therefore, if the above process is performed on all surfaces, only the shape of the processing target, that is, the shape of the processed portion where the material G is processed can be extracted from the shape of the workpiece W.

As described above, if the processing target is extracted in advance and the joining relation information is created for the extracted processing target, the processing target can be reduced by reducing the processing target, and the numerical control data can be reduced. There is an advantage that the creation time can be reduced.

(Embodiment 3) This embodiment corresponds to Embodiment 1.
In the case where the surface representing the shape of the workpiece captured in the process 1 is a free-form surface, the z component of the normal vector of the point group uniformly generated at predetermined intervals on the free-form surface is a point within a predetermined range. The feature is that the group is put together, and the part obtained by dividing the free-form surface at the boundary of these point groups is added to the processing target after the processing 2, and the other processing and the configuration of the numerical control data generating apparatus are the same as those of the first embodiment. Therefore, illustration and description are omitted.

That is, when one surface a of the workpiece W is a free-form surface in which normal vectors in the surface are significantly different from each other as shown in FIG. 27A, the normal line as shown in FIG. Parts a1 to a4 where the directions of the vectors are relatively close
, It is possible to set an appropriate processing method according to the degree of inclination for each of the parts a1 to a4. For example, so-called scan processing is set for the portions a1 and a4 of the gentle slope having a small degree of inclination, so-called contour processing is set for the portion a2 having a large degree of inclination, and a portion a3 that can be regarded as a flat surface having a very small degree of inclination is set. What is called a region processing may be set.

Next, the processing which is a feature of this embodiment, that is, the processing of dividing the free-form surface into the parts whose normal vector directions are relatively close as described above, will be described with reference to the flowchart of FIG. 28 and FIG. Will be explained.

First, the CAD data capturing means 1 captures the surface information of the shape of the workpiece W from the CAD device. If the free-form surface F exists on the surface of the workpiece W, the joining relationship information creating means 2 generates points D uniformly at predetermined intervals on the free-form surface F (see FIG. 29A). , And the z component of the normal vector of each point D is obtained (see FIG. 29B). Then, a group (point group) of points D where the z component of the normal vector falls within a predetermined range is collected into one, and a free curve (equally inclined line) L is generated at the boundary of each point group (FIG. 29 ( c)
The free curve L divides the free curved surface F into a plurality of portions F1 to F4 (see FIG. 29D). Further, the joining relation information creating means 2 divides the divided parts F1 to F4
Is added to the processing target (the target of the joint relation information creation processing), and the original free-form surface F is excluded from the processing target.

When the workpiece W includes a free-form surface as described above, if the free-form surface is divided into a plurality of parts corresponding to the inclination angles and the joining relation information is created for each part, There is an advantage that machining information according to the inclination angle of the free-form surface can be easily created.

(Embodiment 4) This embodiment corresponds to Embodiment 1
Prior to the processing 2, the feature is that the expression of the contour of each surface of the workpiece is compared, and a plurality of adjacent contours having the same expression are grouped to regenerate the surface information of the workpiece. The other processes and the configuration of the numerical control data creation device are the same as those in the first embodiment, and thus illustration and description are omitted.

For example, as shown in FIG. 30A, even if the contours E1 and E2 of the surface a of the workpiece W are displaced in parallel, the deviation of the two contours E1 and E2 affects the final shape of the workpiece W. , The two contours E1 and E2 can be treated as one contour to reduce the number of processing objects in the joint relation information creating process.

Therefore, the joining relation information creating means 2 of this embodiment performs the processing shown in the flow chart of FIG. 31 before performing the processing 2 to match the matching contour (edge) E1 of the matching face (for example, a). It is determined whether the expression with the contour (edge) E2 is the same. That is, each contour E1, E2
Are represented by [f (t) = x, g (t) = y, e (t) = y], [p (t) =
x, q (t) = y, r (t) = y], f (t) = p (t + C) and g (t) = q between the expressions of both contours E1 and E2. (t + C), e (t) = r (t +
C) holds (where C is a constant), and two contours E
Since the expressions of 1, E2 can be regarded as substantially the same,
The coordinates (x1, y1, z1) of the end point of the contour E1 to be compared are the coordinates (x2, y2, z2) of the end point of the contour E2 to be compared.
(See FIG. 30B), and the contour E2 to be collated with the contour E1 to be collated is grouped. At this time,
The expression of the grouped contour E1 is [f (t × x1 / x2) =
x, g (t × y1 / y2) = y, e (t × z1 / z2) = y] (FIG. 30)
(C)). Further, the joining relation information creating means 2 executes the processing 2 by adding the grouped contours E1 to the processing target, excluding the contour E2 to be collated from the processing target, and regenerating the surface information of the surface a.

As described above, by comparing the expressions of the contours of the respective surfaces of the workpiece and by grouping a plurality of adjacent contours having the same expression, the surface information of the workpiece can be recreated. In addition, there is an advantage that the number of processing objects can be reduced and processing can be reduced, and the time required to create numerical control data can be reduced.

(Embodiment 5) This embodiment relates to Embodiment 1
Before processing 2 of the above, the expression of each surface of the workpiece is compared, and a plurality of adjacent surfaces having the same expression are grouped to re-create the joint relationship information of the surfaces of the workpiece. There is a feature, and the other processes and the configuration of the numerical control data creation device are the same as those of the first embodiment, so that the illustration and description are omitted.

For example, as shown in FIG. 32A, expressions f (x, y, z) and g of two adjacent surfaces a1 and a2 of the workpiece W are obtained.
When (x, y, z) are the same (f (x, y, z) = g (x, y, z)), the contour E ′ where these two surfaces a1 and a2 are joined is subjected to the joining relationship information creation processing. Since these two surfaces a1 and a2 are treated as one surface a even if they are excluded from the objects of the above, it is possible to reduce the number of processing objects in the joint relation information creating process. .

Therefore, the joining relation information creating means 2 of this embodiment performs the processing shown in the flowchart of FIG. 33 before performing the processing 2 to express each of the surfaces to be collated and the adjacent surfaces (the surfaces to be collated). An expression is extracted, and it is determined whether or not the expression of the surface to be matched is the same as the expression of the surface to be matched. For example, FIG.
As shown in FIG. 2 (a), the expression f (x, y, z) and g (x, y, z) of two adjacent surfaces a1 and a2 are the same (f (x, y, z) = g (x, y,
z)), the surface a to be collated from the contour of the surface a1 to be collated
2 is deleted, and a contour that is not adjacent to the face a1 of the face a2 to be compared with the contour of the face a1 to be compared is added to the contour a of the face a1 to be matched.
2 are grouped (see FIG. 32B). At this time,
The expression of the grouped surface a1 is f (x, y, z). Further, the joining relation information creating means 2 outputs the grouped faces a1
Is added to the processing target, and the surface a2 to be collated is excluded from the processing target, and the processing 2 is executed to re-create the joining relation information.

As described above, if the expressions of the respective surfaces of the workpiece are compared and a plurality of adjacent surfaces having the same expression are grouped, the joining relation information of the workpiece is recreated. There is an advantage that the number of processing objects can be reduced to reduce the processing, and the time for creating the numerical control data can be reduced.

(Embodiment 6) This embodiment corresponds to Embodiment 5
In the grouping of the surfaces described in the above, when the arbitrary surface is set as the reference surface, and the surfaces that are in a joint relationship with the reference surface are set as the comparison target surfaces, the two surface information are compared, and they are adjacent with the same expression. In addition to the above, the comparison target surface is grouped with the reference surface, and the comparison target surface is newly set as the reference surface, and the surface information is compared between the reference surface and the comparison target surface in a joining relationship, and the grouping can be performed. The characteristic feature is that a simple surface is searched, and the other processes and the configuration of the numerical control data creation device are the same as those in the first embodiment, and thus illustration and description are omitted.

Thus, the joining relation information creating means 2 of this embodiment performs the processing shown in the flowchart of FIG. 34 before performing the processing 2, and searches for a surface that can be grouped. For example, as shown in FIG.
Taking an example of a polyhedron in which b,... are triangular, first, an arbitrary surface (for example, surface a) is selected as a reference surface and its state (surface information)
Are calculated, and the surfaces b, c, and d having an adjacent relationship (joining relationship) with the reference surface a are stored as comparison target surfaces (FIG. 35).
(B)). Then, the stored state (surface information) of one comparison target surface b is calculated and compared with the surface information of the reference surface a,
If the two coincide with each other, the comparison target surface b is grouped into the reference surface a to be the surfaces of the same group (see FIG. 35C).
Further, the surfaces e and f having an adjacent relationship with the grouped comparison target surface b are added to the comparison target surface, and the grouped comparison target surface b is deleted from the comparison target surface (FIG. 35).
(D)). By repeating the comparison of the surface information with the reference surface a by setting the surface adjacent to the reference surface a and the surface b grouped to the reference surface a as the comparison target surface as described above, the reference surface a is grouped with the reference surface a. It is possible to quickly search for a surface where is possible.

(Embodiment 7) This embodiment relates to Embodiment 1.
Before the process 3 in the above, the joint relation information of a shape irrelevant to the creation of the processing information registered in advance is searched for from the joint relation information of the workpiece, deleted, and the joint relation information of the workpiece is recreated. The other processes and the configuration of the numerical control data creation device are the same as those in the first embodiment, and thus illustration and description are omitted.

For example, in a workpiece W as shown in FIG. 36, if there is a processing part (for example, a small diameter round hole S) that is not to be processed by the numerically controlled machine tool, such a part outside the processing target is processed. By deleting (circular hole S) from the connection relation information, the number of processing targets after the processing 3 can be reduced.

The joining relation information creating means 2 of this embodiment performs the processing shown in the flowchart of FIG. 37 after the end of the processing 2 to delete the part outside the processing target from the joining relation information to perform the processing. The joining relation information of the object W is recreated. Taking a workpiece W as shown in FIG. 36 as an example, the database 4 includes, as joining characteristics of a shape (for example, a small-diameter round hole S) that is not a processing target, an inner contour, a mountain break, 3 that the radius is less than the predetermined value
Assume that two conditions are set. The joining relation information creating means 2 refers to the surface number list (see FIG. 5) of the data table registered in the database 4 when one surface (for example, surface a) is set as the surface to be compared, For the surfaces b, d, f, g, and i to be joined with each other, the feature of the ridge line with each surface b (hereinafter referred to as a joining feature to be collated) is read, and the joining feature of the shape not to be processed (hereinafter, the joining to be collated) Characteristic)
Compare with For example, as shown in FIG. 38 (a), when the joining feature between the surface a of the workpiece W and the inner peripheral surface i of the round hole S matches the joining feature to be collated as shown in FIG. Edge lines having joint characteristics to be collated (edge lines joining surface a and surface i) and surfaces i and j are excluded from the surface number list in the data table, and joint relationship information that does not include shapes other than the processing target is recreated. (See FIG. 3B).

As described above, the joining relation information of a shape (a shape not to be processed) irrelevant to the creation of the processing information registered in advance is searched for from the joining relation information of the workpiece, and is deleted. If the information is recreated, there is an advantage that the number of processing targets can be reduced and the processing can be reduced, and the processing time after processing 3 can be shortened.

(Embodiment 8) This embodiment relates to Embodiment 1.
Before processing 3 in which the z component of the normal vector is within a predetermined range based on the joining relationship information and a plurality of faces having a joining relationship with each other are grouped to define an inclined surface of the workpiece. Since the other processes and the configuration of the numerical control data creating device are the same as those of the first embodiment, illustration and description are omitted.

For example, in a workpiece W as shown in FIG. 39 (a), three surfaces a,
In the case of the configuration of b and c, the joining relation information of the surfaces becomes very complicated. However, if the inclination angles of the three surfaces a, b, and c are within a predetermined range, the three surfaces a, b, and c are grouped as shown in FIG. By using only one composite surface A, it is possible to simplify the bonding relationship information of the surfaces.

Thus, the joining relation information creating means 2 of the present embodiment performs the processing shown in the flowchart of FIG. 40 after the processing 2 is completed. Taking a workpiece W as shown in FIG. 39 as an example, a plane in which the z component of the normal vector is within a predetermined range and is adjacent from among the planes a to g of the workpiece W (hereinafter, a plane to be collated) a, b, and c are extracted to define a composite surface A, and as shown in FIGS. 41 (a) and (b), the joining list of the surfaces a, b, and c to be collated with the member list of the composite surface A is created. I do. Then, the joining relationship information of the combined surface A is added to the data table of the joining relationship information of the workpiece W before processing registered in the database 4 (see FIG. 41C), and the member a of the combined surface A is added. , B, c are excluded, and members a,
By adding the composite surface A to the surface number list where the surfaces e, f, and g joined to b and c are joined, and excluding the members a, b, and c of the composite surface A from the surface number list to be joined, The joining relationship information of the workpiece W composed of a total of five surfaces including the surface (inclined surface) A is represented by the graph shown in FIG.
A new data table is created as shown in FIG.

As described above, if the inclined surface of the workpiece is defined by grouping a plurality of surfaces in which the z component of the normal vector is within a predetermined range and in a joint relationship with each other based on the joint relationship information, There is an advantage that complicated joint relation information can be simply expressed.

(Embodiment 9) This embodiment corresponds to Embodiment 1.
Prior to the process 3 in, a plurality of surfaces having a normal vector having a z component of zero and having a joint relationship with each other are grouped as vertical surfaces based on the joint relationship information, and the x component and the y component of the normal vector are zero. It is characterized in that when the horizontal plane and the plurality of vertical planes grouped are in a joined state of valley breaks, the horizontal plane is set as a processing part,
The other processes and the configuration of the numerical control data creation device are the same as those of the first embodiment, so that illustration and description are omitted.

For example, as shown in FIG. 42 (a), a workpiece W1 having a pentagonal hole H1 formed on the upper surface of a rectangular parallelepiped, and as shown in FIG. 42 (b), a rectangular hole H2 formed on the upper surface of the rectangular parallelepiped. Since the connection relationship information differs for each of the shapes of the holes H1 and H2 (hereinafter, referred to as region shape) with the workpiece W2 provided with the, the region W is compared with the standard model of the region shape as shown in FIG. It is difficult to set at the processing part.

Accordingly, the joining information creating means 2 of the present embodiment
In the above, after the processing 2 is completed, the processing shown in the flowchart of FIG. 44 is performed so that a pentagonal or quadrangular area shape can be represented by the same graph. That is,
According to the procedure of the eighth embodiment, from among the surfaces of the workpiece, a surface where the z component of the normal vector is zero and which is adjacent to the surface (hereinafter, referred to as the following).
The composite plane (vertical plane) is defined by extracting the collation plane (vertical plane), and the joining relationship information of the collation planes a, b, and c is created with the composite plane member list. Then, the ridge lines of the members of the surface of the composite surface, which are joined to the surfaces other than the members at a valley angle of 90 degrees (hereinafter referred to as matching ridge lines), are extracted, and all the matching ridge lines are joined to the same surface. It is determined whether or not
If they are joined to the same surface, a horizontal surface that is in a joining relationship with the vertical surface to be collated is set as a processing part. As a result, as described above, for the two types of workpieces W1 and W2 in which the shapes of the holes H1 and H2 are different between the pentagon and the quadrangle, the region shape can be represented by the same graph as shown in FIG. it can.

As described above, a plurality of planes having a normal vector having a z component of zero and having a bonding relationship with each other are grouped as vertical planes based on the bonding relationship information, and the x component and the y component of the normal vector are zero. If a certain horizontal plane and the plurality of vertical planes in the group are in a valley-broken connection state, setting the horizontal plane as a processing portion can simply express complicated bonding relation information, and the area shape There is an advantage that comparison with the standard model can be easily performed.

(Embodiment 10) In the tenth embodiment, in the grouping of the surfaces described in the eighth embodiment, each surface belonging to a group of two mutually adjacent inclined surfaces (synthetic surfaces) has an angle within a predetermined range. It is characterized by setting the ridgeline of the joining part as a valley shape when it is in the joining state of valley break,
The other processes and the configuration of the numerical control data creation device are the same as those of the first embodiment, so that illustration and description are omitted.

For example, in the case of a workpiece W as shown in FIG. 45 (a), if the inclination angles of the six surfaces a to f are different from each other, the joining relationship information of the surfaces becomes very complicated. However, as described in the eighth embodiment, 3
If the inclination angles of the two surfaces a, b, c and d, e, f are different from each other only within a predetermined range, FIG.
As shown in FIG. 3, these three surfaces a, b, c and d, e, f are grouped to form one combined surface A1, A2, and the ridge connecting the two combined surfaces A1, A2 is formed into one valley fold. If it can be set as a shape, it is possible to further simplify the bonding relationship information of the surfaces.

Thus, the joining relation information creating means 2 of this embodiment performs the processing shown in the flowchart of FIG. 46 after the processing 2 is completed. Taking a workpiece W as shown in FIG. 45 as an example, according to the procedure of the eighth embodiment, among the faces a to f of the workpiece, the faces a, f in which the z component of the normal vector is within a predetermined range and are adjacent to each other. b, c, d, e, and f are extracted, and combined surfaces (inclined surfaces) A1 and A2 are respectively defined to create joining relation information. Among the ridge lines of the surfaces a, b, c and d, e, f, which are members of the inclined surfaces A1, A2, ridge lines having a valley-bending joint relationship with a surface other than the members within a predetermined range (hereinafter, referred to as a ridge line). Ridges to be collated) are extracted, and it is determined whether or not all the ridges to be collated are joined to the same inclined surface A1 or A2. I do. As a result, FIG.
A workpiece W represented by a graph consisting of six vertices a to f and nine sides as shown in FIG. 4A is changed from two vertices A1 and A2 and one side as shown in FIG. Can be represented by the following graph.

As described above, when each of the surfaces belonging to the group of two adjacent inclined surfaces (composite surfaces) is in a valley-shaped joint state at an angle within a predetermined range, the ridge line of the joint portion is set as a valley shape. Then, there is an advantage that complicated joint relation information can be expressed more simply.

(Embodiment 11) In the present embodiment, when there are a plurality of identical machining parts in the processing 4 of the first embodiment and the machining process for each machining part is set in the machining process procedure information, The feature is that the processing step procedure information is extended by the number of pieces, and the other processes and the configuration of the numerical control data creation device are the same as those of the first embodiment, so that the illustration and description are omitted.

For example, a shape model M as shown in FIG.
Is created, the processing information creating means 5 generates the shape model M
If it is confirmed that there are a plurality of round hole processing shapes (five in the illustrated example) as a result of shape recognition from, the processing step procedure information is extended by the number of round hole processing.

Thus, the processing information creating means 5 of this embodiment
In the case where there are a plurality of the same processing parts in the processing 4, the processing shown in the flowchart of FIG. 48 is performed. Taking the shape model M as shown in FIG. 47 as an example, it is determined whether or not there is a machining shape (a round hole shape in this case) in which machining process procedure information is registered in the database 4 for all the machining parts. If it is checked, and it exists, FIG. 49 (a)
Is registered in addition to the original machining process procedure information shown in FIG. As a result, processing step procedure information that is expanded in accordance with the number of round holes as shown in FIG.

As described above, when there are a plurality of identical machining parts and the machining process for each machining part is set in the machining process procedure information, it is efficient to extend the machining process procedure information by the number of machining sites. There is an advantage that processing can be realized.

(Twelfth Embodiment) In the twelfth embodiment, when a plurality of machining methods for a machining portion are set in the machining process procedure information in the process 4 of the first embodiment, the evaluation indices in each machining method are compared with each other. It is characterized in that a processing method having an optimum evaluation index is selected, and the other processes and the configuration of the numerical control data creation device are the same as those in the first embodiment, so illustration and description are omitted.

Thus, the processing information creating means 5 of this embodiment
In the case where a plurality of processing methods for processing portions are set in the processing step procedure information in processing 4, the processing shown in the flowchart of FIG. 50 is performed. That is, processing step procedure information having different processing methods for the same processing part is read, and an evaluation index (described later) for comparison is calculated for each processing method, and the calculated evaluation indexes are compared. Select the optimal processing method. After such processing is performed for all the processing portions, the entire processing method is determined, and processing step procedure information including the processing method is output.

Here, in the present embodiment, the time required for processing (processing time) is adopted as an evaluation index for selecting an optimum processing method. The processing time shown in the flowchart of FIG. 51 is executed using the parameters to calculate the processing time in a pseudo manner. For example, as an example, as shown in FIG. 52, a case where a hatched portion is left and a white portion other than the hatched portion is set as a processing portion (a portion to be removed) is shown in FIG.
As shown in FIG. 2 (a), points are uniformly generated at equal intervals on the surface to be processed, and when a circle S equal to the tool diameter is drawn with a certain point as the center, the circle S becomes a non-machining portion (hatched portion). )
Are defined as points that can be machined (machining points) when they do not intersect with each other, and when the circle S intersects the non-machining portion as shown in FIG. And the number of machining points included in the surface to be processed is counted. Then, by multiplying the number of processing points by the square of the interval between the points, the processing area (the area of the white portion in FIG. 52) is calculated in a pseudo manner.

Next, the processing distance by the tool is calculated from the calculated processing area. That is, as shown in FIG. 53, the area to be processed (processing area) is considered to be a square, and the distance S from the center of the processing area to each side is obtained by multiplying the square root of the processing area by 1/2. The number of scans n is calculated from the distance S and the pitch E of the area operation by the tool using the following equation.

N = (E−S) / S + 1 Further, a processing distance T is calculated from the number of scans n using the following equation.

T = 4n × (S + E) The processing time can be calculated by dividing the processing distance T by the processing speed.

The processing time obtained as described above is compared, and the processing method that minimizes the processing time is selected.

As described above, when a plurality of processing methods for the processing portion are set in the processing step procedure information, the evaluation indices of the respective processing methods are compared with each other, and if the processing method having the optimum evaluation index is selected, the efficiency is improved. There is an advantage that good processing can be realized.

(Embodiment 13) This embodiment is characterized in that machining cost is adopted as an evaluation index for selecting an optimal machining method in Embodiment 12, and other processes and a numerical control data creation device Is the same as that of the first and twelfth embodiments, and the illustration and description are omitted.

The processing information creation means 5 in this embodiment calculates the processing cost in a pseudo manner by executing the processing shown in the flowchart of FIG. 54 using the range of the processing part and the processing information parameter. ing. Specifically, the processing cost is calculated from the processing time calculated in the same procedure as in the twelfth embodiment by the following formula. However, "int" represents an operator for extracting only an integer of the numerical value in parentheses.

Processing cost = int (processing time + 0.9999) × man-hour unit price By comparing the processing costs obtained as described above, the processing method with the lowest processing cost is selected.

(Embodiment 14) This embodiment is characterized in that tool cost is adopted as an evaluation index for selecting an optimum machining method in Embodiment 12, and other processing and a numerical control data creation device Is the same as that of the first and twelfth embodiments, and the illustration and description are omitted.

The processing information creating means 5 in this embodiment calculates the tool cost in a pseudo manner by executing the processing shown in the flowchart of FIG. 55 using the range of the processing part and the processing information parameter. ing. Specifically, the tool cost is calculated from the machining distance T calculated in the same procedure as in the twelfth embodiment by the following formula. However, "int"
Represents an operator that extracts only the integer part of the number in parentheses.

Tool cost = int (working distance T / tool life + 0.9999) × tool unit price By comparing the tool costs obtained as described above, the machining method with the lowest tool cost is selected.

(Embodiment 15) This embodiment is characterized in that a tool load is adopted as an evaluation index for selecting an optimum machining method in Embodiment 12, and other processes and a numerical control data creation device Is the same as that of the first and twelfth embodiments, and the illustration and description are omitted.

The machining information creating means 5 in this embodiment calculates the tool load in a simulated manner by executing the processing shown in the flowchart of FIG. 56 using the range of the machining part and the machining information parameters. ing. For example, as shown in FIG. 57, a case where a processed portion (opened portion) is removed from the unprocessed workpiece W to obtain a final processed shape (hatched portion) will be described. The height (z coordinate in the orthogonal coordinate system) h from the bottom surface of the to the unprocessed processing point k is extracted, and the processed point k ′ after processing is extracted.
(Z coordinate in the orthogonal coordinate system) h ′, and the difference Δh (= h−h ′) between the two is calculated and stored.
Then, if the calculated value is larger than the stored value, the calculated value is replaced with the larger value, and such processing is performed for all the processing points k and k ′, whereby the maximum value Δh _max of the difference Δh is obtained. Ask. Then, the obtained maximum value Δh _max
Is used to calculate the tool load by the following equation. However, the tool load coefficient and the material load coefficient are values determined by the type of tool used for processing and the material of the workpiece W.

Tool load = Δh _max × Tool load coefficient × Material load coefficient The tool loads determined as described above are compared, and a processing method that minimizes the tool load is selected.

(Embodiment 16) By the way, as a tool used in the machining steps described so far, there is a cutting tool (end mill) 10 as shown in FIG. This tool 10 is a ball end mill in which the tip of a blade 11 has a curved surface shape, and has a cylindrical shank 12 at the base of the blade 11. As shown in FIG. , 21 are clamped to fix the shank 12. As shown in FIG. 61 (b), there is also a tool 10 'in which a relief portion 13 having a smaller diameter than the blade 11 is provided between the blade 11 and the shank 12. Here, since the diameters of the shank 12 and the chucks 20 and 21 are larger than the diameter of the blade 11 that actually cuts the processing portion, the chuck 20 and the like are attached to the workpiece W as shown in FIG. Processing may not be possible due to interference.

Therefore, in the present embodiment, the processing 4 of the first embodiment is performed.
In each processing step, the degree of interference between the tool used for processing and the shape in the processing step is analyzed, and based on the analysis result, the interference between the tool and the shape in the processing step is avoided, specifically, for the same processing. It is characterized in that a plurality of types of tools to be used are prepared, and a tool that does not interfere with the shape in the machining process is selected based on the above analysis result. The other processing and the configuration of the numerical control data creation device are the same as those in the first embodiment. Therefore, illustration and description are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 58 is performed for each processing step.

First, the shape (= process shape) in the already-formed processing step is taken in, and the processing information parameters (number of blades, diameter, blade 11) registered in the database 4 are taken.
Length (blade length), shank 12 length (shank length),
The tool shape (hereinafter, abbreviated as “tool shape”) created from the chucks 20 and 21) is taken in.

Next, as shown in FIG. 59 (a), a process shape (for example, a shape having a free-form surface) F taken in a lattice shape at regular intervals on an XY plane of a three-dimensional orthogonal coordinate system as shown in FIG. A set (point group) of the made points K is projected. And
As shown in FIG. 59 (b), the center of the tool is arranged at an arbitrary point K1 of the point group, and a tool shape (for example, a circle having a diameter equal to the shank diameter around the point K) J is generated. Then, a point Kn (n = 2, 3, 3) in the tool shape J and the non-machining portion (the hatched portion in FIG. 59B)
…)), That is, the presence / absence and number of points Kn present in the non-machining part and within the circle of the process shape J are analyzed, and interference information including the interference position, the interference amount, and the interference part is created. To remember. For example, in FIGS. 59 (b) and (c), a point Km satisfying the above condition among the points Kn indicated by white circles is indicated by a black circle. By repeating the above processing, interference information is created and stored for all points Kn.

Next, the presence / absence of interference is determined based on the interference information created as described above. If there is no interference, there is no need to take measures to avoid the interference, so the process proceeds to the next process. On the other hand, if there is interference, it is necessary to take measures to avoid the interference, so in this embodiment, the tool is changed to a tool that does not interfere. For example, if the shank 12 of the tool 10 interferes with the non-machining part as shown in FIG. 59 (c), the blade length of the tool 10 is shorter than that of the tool 10 based on the machining information parameters registered in the database 4. A long tool is selected (see FIG. 62 (b)). Then, the processing shifts to the next processing using the processing information parameters of the newly selected tool.

As described above, the degree of interference between the tool used in the machining and the shape in the machining process is analyzed for each machining process, and measures to avoid interference between the tool and the shape in the machining process based on the analysis result, for example, By preparing a plurality of types of tools to be used for machining and taking measures such as selecting a tool that does not interfere with the shape in the machining process based on the above analysis results, it is possible to avoid interference between the tool and the shape in the machining process. There is an advantage that efficient processing can be realized.

(Embodiment 17) This embodiment shows a procedure for selecting a tool that does not interfere in Embodiment 16.
Information of a plurality of types of tools is registered in the database 4 in advance, and the interference with the process shape is verified using the information of each tool sequentially read from the database 4, and a tool that does not interfere is selected based on the verification result. There is a feature in the point. The other processes and the configuration of the numerical control data creation device are the same as those in the first and sixteenth embodiments, so that illustration and description thereof are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 63 is performed for each processing step. That is, the first embodiment
In the same way as in step 6, the process shape and tool shape are fetched, and the presence or absence of interference is determined based on the interference information created for all points generated in the tool shape. If there is no interference, the process proceeds to the next process as it is I do.

On the other hand, if there is interference, for example, if the chuck 20 or 21 of the machine tool is interfering with the non-machining part, the current tool is referred to by referring to the tool information registered in the database 4. Also selects a tool with a long shank length. Further, a tool shape is created again using the processing information parameters of the newly selected tool, and the presence or absence of interference is determined based on the interference information created for the point group generated in the tool shape. Thus, as shown in FIG. 64, the above process is repeated until a tool 10 that does not cause interference is selected, and if a tool that does not interfere is selected, the process proceeds to the next process using the processing information parameters of the tool. is there.

(Embodiment 18) This embodiment shows a procedure for selecting a tool which does not interfere in Embodiment 16.
It is characterized in that the interference amount between the tool and the shape in the machining process is derived, and the mounting length of the tool to the numerically controlled machine tool is adjusted according to the derived interference amount. Other processes and the configuration of the numerical control data creation device are described in the first embodiment.
In addition, since it is the same as the sixteenth embodiment, illustration and description are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 65 is performed for each processing step. That is, the first embodiment
In the same way as in step 6, the process shape and tool shape are fetched, and the presence or absence of interference is determined based on the interference information created for all points generated in the tool shape. If there is no interference, the process proceeds to the next process as it is I do.

On the other hand, if there is interference, for example, if the chuck 20 or 21 of the machine tool is interfering with the non-machining part, the maximum value of the interference amount (hereinafter referred to as “maximum interference amount”) is obtained from the interference information. ), And based on this maximum interference amount,
With reference to the tool information registered in the database 4, a tool having a longer installation length (flute length + shank length) than the current tool is selected, and the next tool information is selected using the processing information parameters of the newly selected tool. It shifts to processing.

(Embodiment 19) This embodiment shows a procedure for selecting a tool which does not interfere with the embodiment 18 and
Information of a plurality of types of tools is registered in the database 4 in advance, and any one of the plurality of types of tools is selected as a temporary use tool, and an interference amount between the temporary use tool and a shape in a machining process is derived. Then, based on the information of each tool registered in the database 4, a feature is that a tool having an outer dimension not smaller than the above-mentioned interference amount is added to the outer dimension of the temporary used tool is selected. The other processes and the configuration of the numerical control data creation device are the same as those in the first and eighteenth embodiments, and therefore, illustration and description are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 66 is performed for each processing step. That is, an arbitrary tool is selected as a tentative tool from a plurality of types, and the process shape and the tool shape (the shape of the tentative tool) are taken in as in Embodiments 16 and 18 to generate the tool shape. The presence or absence of interference is determined based on the interference information created for all points, and if there is no interference, the process proceeds to the next process.

On the other hand, if there is interference, for example, if the chuck 20 or 21 of the machine tool is interfering with the non-machining portion, the maximum value of the interference amount (hereinafter referred to as “maximum interference amount”) is obtained from the interference information. ) Is calculated and a new installation length that is not smaller than the addition of the maximum interference amount to the installation length of the temporary used tool is calculated, and the new installation length is referred to by referring to the tool information registered in the database 4. Is selected. Then, the processing shifts to the next processing using the processing information parameters of the newly selected tool.

(Embodiment 20) This embodiment shows a procedure for selecting a tool that does not interfere in Embodiment 18.
Select any one of the multiple tools as a temporary tool, derive the amount of interference between the temporary tool and the shape in the machining process, and add the amount of interference to the outer dimensions of the temporary tool Is characterized in that the length of the tool attached to the numerically controlled machine tool is calculated. The other processes and the configuration of the numerical control data creation device are the same as those in the first and eighteenth embodiments, and therefore, illustration and description are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 67 is performed for each processing step. That is, an arbitrary tool is selected from a plurality of types as a tentative tool, and the process shape and the tentative tool are fetched in the same manner as in Embodiments 16 and 19, and all points generated in the tool shape are created. The presence or absence of interference is determined based on the obtained interference information, and if there is no interference, the process proceeds to the next process.

On the other hand, if there is interference, for example, if the chuck 20 or 21 of the machine tool is interfering with the non-machining part, the maximum interference amount is calculated from the interference information, A new mounting length is calculated by adding the maximum interference amount and the margin value to the mounting length, and the shank length is calculated by subtracting the blade length of the temporary used tool from the new mounting length. Then, referring to the tool information registered in the database 4, a tool having a shank length not smaller than the above-mentioned shank length is selected, and the next processing is performed using the processing information parameters of the newly selected tool. It is a transition.

(Embodiment 21) This embodiment shows a procedure for selecting a tool which does not interfere in Embodiment 16.
It is characterized in that an interference part between the tool and the shape in the machining process is derived, and the diameter of the mounting portion of the tool to the numerically controlled machine tool is adjusted according to the derived interference part. The other processes and the configuration of the numerical control data creation device are the same as those in the first and sixteenth embodiments, so that illustration and description thereof are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 68 is performed for each processing step. That is, the first embodiment
In the same way as in step 6, the process shape and tool shape are fetched, and the presence or absence of interference is determined based on the interference information created for all points generated in the tool shape. If there is no interference, the process proceeds to the next process as it is I do.

On the other hand, if there is interference,
If the shank 12 interferes with the non-machining part, the interference part is confirmed from the interference information, the maximum interference amount of the interference part is calculated, and a tool having a shank diameter that does not interfere based on the maximum interference amount ( A tool with a smaller shank diameter than the current tool is selected, and the process proceeds to the next process using the processing information parameters of the newly selected tool.

(Embodiment 22) This embodiment shows a procedure for selecting a tool which does not interfere in Embodiment 21.
Information on a plurality of types of tools is registered in the database 4 in advance, and any one of the plurality of types of tools is selected as a temporary use tool, and an interference portion between the temporary use tool and a shape in a machining process is derived. A feature is that a tool having a mounting portion diameter (shank diameter) capable of avoiding interference is selected based on the information of the interference part and the information of each tool registered in the database 4. The other processes and the configuration of the numerical control data creation device are the same as those of the first and the twenty-first embodiments, so that the illustration and description are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 69 is performed for each processing step. That is, an arbitrary tool is selected from among a plurality of types as a temporary use tool, and the process shape and the tool shape (the shape of the temporary use tool) are taken in as in Embodiments 16 and 21 to generate the tool shape. The presence or absence of interference is determined based on the interference information created for all points, and if there is no interference, the process proceeds to the next process.

On the other hand, if there is interference,
If the shank 12 does not interfere with the non-machining part, the interference part is confirmed from the interference information, the maximum interference amount of the interference part is calculated, and the tool registered in the database 4 is calculated based on the maximum interference amount. A tool having a shank diameter that does not interfere (a tool with a smaller shank diameter than the current tool) is selected with reference to the information of the second tool, and the next process is performed using the processing information parameters of the newly selected tool. .

(Embodiment 23) This embodiment shows a procedure for selecting a tool which does not interfere in Embodiment 21.
Attachment part that can select any one of the multiple tools as a temporary use tool, derives the interference part between the temporary use tool and the shape in the machining process, and avoids interference using information on the interference part The feature is that the diameter of is calculated. In addition,
The other processes and the configuration of the numerical control data creation device are the same as those of the first and twenty-first embodiments, so that the illustration and description are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 70 is performed for each processing step. That is, an arbitrary tool is selected from among a plurality of types as a temporary use tool, and the process shape and the tool shape (the shape of the temporary use tool) are taken in as in Embodiments 16 and 21 to generate the tool shape. The presence or absence of interference is determined based on the interference information created for all points, and if there is no interference, the process proceeds to the next process.

On the other hand, when there is interference, for example, FIG.
As shown in (a), if the shank 12 of the tool 10 interferes with the non-machining portion, the maximum interference amount is calculated from the interference information, and the maximum interference amount and the current installation length of the temporary used tool are added. A new attachment length is calculated by adding the margin value, and further, the length of the relief portion 13 (hereinafter, referred to as the length) is obtained by subtracting the blade length and the margin value of the temporary used tool from the new attachment length.
"Escape length") is calculated. Then, referring to the tool information registered in the database 4, a tool having a relief portion 13 with a relief length not smaller than the relief length is selected (see FIG. 71 (b)), and a newly selected tool is selected. The process proceeds to the next process using the processing information parameters of the tool.

(Embodiment 24) This embodiment shows a procedure for selecting a tool which does not interfere in Embodiment 16.
Deriving the interference amount between the tool and the shape in the machining process, adjusting the mounting length of the tool to the numerically controlled machine tool according to the derived interference amount, and deriving and deriving the interference part between the tool and the shape in the machining process It is characterized in that the diameter of the mounting portion of the tool with respect to the numerically controlled machine tool is adjusted according to the interference part. The other processes and the configuration of the numerical control data creation device are described in the first embodiment and the first embodiment.
6 and the illustration and description are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 72 is performed for each processing step. That is, the first embodiment
In the same way as in step 6, the process shape and tool shape are fetched, and the presence or absence of interference is determined based on the interference information created for all points generated in the tool shape. If there is no interference, the process proceeds to the next process as it is I do.

On the other hand, when there is interference, for example, FIG.
As shown in (a), when the shank 12 of the tool 10 and the chuck 20 of the machine tool interfere with the non-machining portion, the maximum interference amount (= the maximum interference amount with the shank 12 + the maximum with the chuck 20) is obtained from the interference information. Interference amount). And
An integer part of a value obtained by adding 0.9 to the calculated maximum interference amount with the shank 12 is obtained, and the numerical value of this integer part is used as a relief length, and the shank 1 is added to the current installation length of the temporary use tool.
2 and the value obtained by adding the relief length and the allowance value to the blade length of the temporary working tool and the value obtained by adding the relief value and the allowance value. I do. Further, the new shank length is calculated by subtracting the blade length of the temporary tool and the relief length from the new installation length. With reference to the tool information registered in the database 4, a tool having a dimension not smaller than the relief length and the shank length is selected (see FIG. 73 (b)), and the newly selected tool is selected. The processing shifts to the next processing using the processing information parameters.

(Embodiment 25) In this embodiment, in order to avoid interference between a tool and a shape in a machining step, each machining step is divided into a plurality of sub-machining steps, and interference can be avoided for each sub-machining step. It is characterized in that a suitable tool is selected, and the other processes and the configuration of the numerical control data creation device are the same as those in the first embodiment, and therefore illustration and description are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 74 is performed for each processing step.

First, as in the sixteenth embodiment, the process shape and the tool shape are fetched, interference information is created for all points generated in the tool shape, and the presence or absence of interference is determined based on the interference information. Here, if there is interference with the tool for which the interference information has been created, in order to avoid the interference, a tool capable of avoiding the interference is selected for each of a plurality of sub-machining steps obtained by dividing the machining step. More specifically, as shown in the flowchart of FIG. 75, in the machining process, a depth at which machining can be performed by avoiding interference with the tool for which the interference information has been created is calculated, and the machining process performed with this tool is defined as one sub-machining process. That is, the depth (z value) to be machined in the sub-machining step is changed to a depth that can be machined by the tool that created the interference information. Here, the machining depth after this change may be the sum of the maximum interference amount and the Z coordinate of the maximum interference part. For example, as shown in FIG. 76, when the tool shape J is generated by arranging the center of the tool at an arbitrary point K1 of the point cloud, the tool shape J is located at a non-machining portion (hatched portion in FIG. 76). If the amount of interference at the point Km (black circle in FIG. 76), which is an interference part existing in the circle, is the maximum, that part is referred to as the maximum interference part.
The Z coordinate at the center K1 (see FIG. 76) of the tool shape J at that time is defined as “Z coordinate of the maximum interference part” (see FIG. 77).

Then, the process of creating interference information and determining the presence / absence of interference is performed again for the changed processing depth, and if there is no interference, it is determined whether the processing to the specified depth is possible. Here, as described above, if the z value in the sub-machining step has been changed to a value smaller than the z coordinate of the final machining shape of the workpiece W (this is referred to as “designated depth”) in order to avoid interference, as described above. In addition, it is necessary to add a processing step (sub-processing step) using a new tool for processing to the final processing shape. For this purpose, a new tool shape in which dimensions such as a tool diameter and a mounting length are changed according to a predetermined rule with reference to a tool size table as shown in FIG. 78 is created, and all points generated in the new tool shape are created. A process for determining the presence or absence of interference is performed based on the obtained interference information. Then, the processing of the sub-machining step is repeated until the processing to the designated depth becomes possible. Instead of regularly determining a new tool shape with reference to the tool dimension table as described above, the new tool shape may be determined from calculated values.

Thus, this embodiment is effective for procuring a new tool each time the machining process is divided into sub-machining processes due to interference without having a stock of tools.

(Embodiment 26) This embodiment shows a procedure for determining a new tool shape in Embodiment 25.
Information of a plurality of types of tools that can be machined at different depths is registered in the database 4 in advance, and in each machining step, machining is performed with one of the plurality of types of tools registered in the database 4 to avoid interference. A possible depth is calculated, and the machining process performed with the one type of tool is defined as one sub-machining process, and a plurality of types of tools registered in the database 4 for each sub-machining process until the designated depth is reached. The feature is that one of the tools is selected. Other processes and the configuration of the numerical control data creation device are described in the first embodiment.
In addition, since it is the same as the twenty-fifth embodiment, its illustration and description are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 79 is performed for each processing step. That is, the second embodiment
Similarly to 5, when there is interference with the tool for which the interference information is created, the interference is avoided by the tool and the depth that can be machined is calculated, and the depth (z value) to be machined in the sub-machining step is calculated as described above. Change to a depth that can be machined with the tool that created the interference information, create interference information again for the changed machining depth and perform the process of determining the presence or absence of interference, and if there is no interference, is it possible to machine to the specified depth? Determine whether or not.

When the machining to the designated depth is impossible, in the present embodiment, one of the plurality of types of tools registered in the database 4 is selected to create a new tool shape. For example, as shown in FIG. 80 (a), when the chuck 20 and the non-processed portion of the workpiece W interfere with each other,
The machining depth of the tool 10 is changed as shown in FIG. 6B, and a tool 10 having a longer shank length than the tool 10 is selected as a tool in the next sub-machining step as shown in FIG. I do. Further, interference information is created for all points generated in the new tool shape, and processing for determining the presence or absence of interference is performed based on the interference information. Then, the processing of the sub-machining step is repeated until the processing to the designated depth becomes possible.

(Embodiment 27) In this embodiment, a machining distance that can be machined by one type of tool is calculated with respect to embodiment 26, and if the machining distance exceeds a limit value, another type of tool is used. Is selected from the database 4 to increase the number of processes. Other processes and the configuration of the numerical control data creation device are described in the first embodiment.
In addition, since they are the same as the embodiments 25 and 26, illustration and description are omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 81 is performed for each processing step. That is, the second embodiment
Similarly to 5 and 26, when there is interference with the tool for which the interference information is created, the interference is avoided by the tool and the depth that can be machined is calculated, and the depth (z value) to be machined in the sub machining step Is changed to a depth that can be machined by the tool that created the interference information, and the process of creating interference information and determining the presence or absence of interference is performed again for the changed machining depth.

On the other hand, in the present embodiment, when it is determined that there is no interference, the processing distance T described in the twelfth embodiment is calculated before it is determined whether the processing to the designated depth is possible. A process of increasing the number of processes by comparing a preliminarily registered limit value for each tool (a processing distance that can be processed at once with one type of tool) and the processing distance T and if the processing distance T exceeds the limit value is performed. Do. If machining to the designated depth is impossible, one of the plurality of tools registered in the database 4 is selected to create a new tool shape. Further, interference information is created for all points generated in the new tool shape, a process of determining the presence or absence of interference is performed based on the interference information, and the above-described sub-machining process is performed until machining to a specified depth becomes possible. Is repeated.

(Embodiment 28) This embodiment is different from the embodiment 26 in that a tool load that can be machined by one type of tool is calculated, and when the tool load exceeds a limit value, another type of tool is processed. Is selected from the database to increase the number of processes. The other processes and the configuration of the numerical control data creation device are the same as those in the first and the twenty-fifth and twenty-sixth embodiments. Is omitted.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 82 is performed for each processing step. That is, the second embodiment
Similarly to 5 and 26, when there is interference with the tool for which the interference information is created, the interference is avoided by the tool and the depth that can be machined is calculated, and the depth (z value) to be machined in the sub machining step Is changed to a depth that can be machined by the tool that created the interference information, and the process of creating interference information and determining the presence or absence of interference is performed again for the changed machining depth.

On the other hand, in the present embodiment, when it is determined that there is no interference, the tool load described in the fifteenth embodiment is calculated before determining whether machining to the specified depth is possible, The limit value of each registered tool (the tool load allowed for one type of tool) is compared with the tool load, and if the tool load exceeds the limit value, processing for increasing the number of processes is performed. If machining to the designated depth is impossible, one of the plurality of tools registered in the database 4 is selected to create a new tool shape. Further, interference information is created for all points generated in the new tool shape, a process of determining the presence or absence of interference is performed based on the interference information, and the above-described sub-machining process is performed until machining to a specified depth becomes possible. Is repeated.

(Embodiment 29) In this embodiment, in order to avoid interference between a tool and a shape in a machining process, a plurality of types of tools used for the same machining are prepared, and a tool which does not interfere with the process shape based on an analysis result. And use it,
It is characterized in that each machining process is divided into a plurality of sub-machining processes, and a tool capable of avoiding interference is selected for each sub-machining process. Other processes and the configuration of the numerical control data creation device are described in the first embodiment. Since they are the same as those in FIG.

Thus, the processing information creating means 5 of this embodiment
In the processing 4, the processing shown in the flowchart of FIG. 83 is performed for each processing step. That is, the second embodiment
Similarly to 5, when there is interference with the tool for which the interference information is created, the interference is avoided by the tool and the depth that can be machined is calculated, and the depth (z value) to be machined in the sub-machining step is calculated as described above. The interference information is changed to a depth that can be machined by the tool that created the interference information, and the process of creating the interference information and determining the presence or absence of interference is performed again for the changed machining depth.

On the other hand, in the present embodiment, when it is determined that there is no interference at the machining depth after the change, the interference part with the tool is confirmed from the interference information before the change. For example, when the shank 12 of the tool 10 and the chuck 20 of the machine tool interfere with the non-machining portion, the maximum interference amount (= the maximum interference amount with the shank 12+ The maximum amount of interference with the chuck 20 is calculated, and an integer part of a value obtained by adding 0.9 to the calculated maximum amount of interference with the shank 12 is obtained. The value obtained by adding the maximum interference amount and the margin value of the shank 12 to the current installation length of the tool and the value obtained by adding the relief length and the margin value to the blade length of the temporary used tool are determined. Is the new installation length.
Further, a new shank length is calculated by subtracting the blade length of the temporary used tool and the relief length from the new installation length, a tool having these dimensions is selected, and machining information of the newly selected tool is selected. It is determined whether machining to the designated depth is possible based on the parameter. If machining to the designated depth is not possible, one of the plurality of types of tools registered in the database 4 is selected and a new tool shape is created, as in the twenty-sixth embodiment.
Further, processing for determining the presence or absence of interference is performed based on the interference information on the new tool shape, and the processing of the sub-machining step is repeated until the processing to the specified depth becomes possible.

(Embodiment 30) In this embodiment, in process 5 of Embodiment 1, the process shape of the workpiece is compared with the final processed shape of the workpiece, and a shape model of only the unprocessed portion in the process shape is created. It is characterized by the fact that it is displayed in the same manner as above, and the other processes and the configuration of the numerical control data creation device are the same as those of the first embodiment, so that illustration and description are omitted.

In this embodiment, as shown in the flow chart of FIG. 84, the processing information creating means 5 reads information on the final processing shape of the workpiece and information on the process shape in each processing step from the database 4, and reads the final processing shape. Then, a z-value map is created by extracting the height (z coordinate) of the contour at predetermined intervals for the process shape. Then, a point where the z value on the z value map changes between the final processed shape and the process shape is extracted, and the z value is registered. From the registered z value, a shape model of only the unprocessed portion is obtained. It is created and displayed on the display means 6.

As described above, if the shape model of only the unprocessed portion in the process shape is created and displayed, there is an advantage that the operator can easily grasp the unprocessed portion.

[0163]

According to the first aspect of the present invention, there is provided a numerical control data generating method for generating numerical control data for processing a workpiece by a numerically controlled machine tool.
A first process of capturing the surface information including the expression of the surface representing the shape of the workpiece and the expression of the outline of the surface from the dimensional CAD data, and comparing the expression of the captured outline of each surface with each other; A second process of creating joining relationship information indicating that the two surfaces are joined with the contour as a ridgeline when the two match, and joining the joining relationship information to a standard model of a machining shape registered in advance. A third process of setting the part as a processing part when the two parts are matched with each other, and a processing information creation procedure registered in advance and a standard model of the processing shape. And a fourth process for creating the processing information of the processing portion set according to the processing information parameter. Therefore, the numerical processing of the workpiece having various three-dimensional shapes using the three-dimensional CAD data of the workpiece is performed. Data there is an effect that it is possible to create quickly and easily. In addition, there is an effect that restrictions in creating a shape of a workpiece are reduced, and a three-dimensional shape of the workpiece can be created without being conscious of a processing method or the like.

According to a second aspect of the present invention, in the first aspect of the present invention, in the second processing, a number assigned to each surface,
The joint relation information is expressed by information on expression of each surface, a list of the numbers of surfaces to be joined to each surface, information on an expression of a ridge line to be joined, and a joint angle of two surfaces to be joined. The same effect as that of the invention is achieved.

According to a third aspect of the present invention, in the first aspect of the present invention, in the second processing, the surface information of the material having the expression of the surface representing the material shape before machining and the expression of the contour of the surface is obtained. Since only the connection relationship information of the surface of the workpiece positioned below the surface information of the material is taken in from the three-dimensional CAD data and is subjected to the third and subsequent processes, the third process is performed.
Thus, there is an effect that the number of processing targets after the processing can be reduced, and the processing can be reduced.

According to a fourth aspect of the present invention, in the first aspect of the present invention, when the surface representing the shape of the workpiece taken in the first processing is a free-form surface, the surface is uniformly formed at a predetermined interval on the surface. Since the z component of the normal vector of the generated point group collects the point group within a predetermined range, and adds a portion obtained by dividing the surface at the boundary of the point group to a processing target after the second processing. There is an effect that processing information according to the inclination angle of the free-form surface can be created.

According to a fifth aspect of the present invention, in the first aspect of the present invention, prior to the second processing, the expressions of the contours of each surface of the workpiece are compared, and adjacent expressions having the same expression are obtained. Since the surface information of the workpiece is recreated by grouping a plurality of contours, the number of processing targets after the second processing can be reduced, and the processing can be reduced.

According to a sixth aspect of the present invention, in the first aspect of the present invention, in the second processing, expressions of the respective surfaces of the workpiece are compared, and a plurality of adjacent surfaces having the same expression are compared. Is grouped, the joining relationship information of the surface of the workpiece is recreated, so that the number of processing targets after the third processing can be reduced, and the processing can be reduced.

According to a seventh aspect of the present invention, in the invention of the sixth aspect, in the grouping, an arbitrary surface is set as a reference surface, and a surface which is in a bonding relationship with the reference surface is set as a comparison target surface, and the two surface information are compared. And, when the above-mentioned comparison target surface is grouped with the reference surface when they are adjacent with the same expression,
The above comparison target surface is newly set as a reference surface, and the surface information is compared between the reference surface and the comparison target surface in a joining relationship to search for a surface that can be grouped, thereby speeding up the grouping process. There is an effect that can be.

According to an eighth aspect of the present invention, in the first aspect of the present invention, before the third processing, the previously registered joining relation information having a shape irrelevant to the creation of the machining information is combined with the joining of the workpiece. Since the information is searched for and deleted from the relation information and the joining relation information of the workpiece is recreated, the number of processing targets after the third processing can be reduced, and the processing can be reduced.

According to a ninth aspect of the present invention, in the first aspect of the present invention, before the third processing, the z component of the normal vector is within a predetermined range based on the connection relation information and the connection relation with each other is established. Since the inclined surface of the workpiece is defined by grouping a plurality of surfaces, there is an effect that complicated joint relation information can be simply expressed.

According to a tenth aspect of the present invention, in the ninth aspect of the present invention, when each of the surfaces belonging to the two adjacent inclined surface groups is in a valley-bent joint state at an angle within a predetermined range, the joining is performed. Since the ridgeline of the portion is set as a valley shape, there is an effect that complicated joint relation information can be simply expressed.

According to an eleventh aspect of the present invention, in the first aspect of the present invention, before the third processing, a plurality of z-components of the normal vector are zero based on the connection relation information and are in a connection relation with each other. Planes are grouped as vertical planes, and when the horizontal plane in which the x component and the y component of the normal vector are zero and the plurality of grouped vertical planes are in a valley-bent joint state, the horizontal plane is processed into the processing region. Since it is set as, there is an effect that complicated joining relation information can be simply expressed.

According to a twelfth aspect of the present invention, in the first aspect of the present invention, in the fourth processing, the processing step procedure information indicating the processing order of the processing information parameter is processed by the processing set in the third processing. The processing step that matches the shape of the workpiece is determined by collating with the part, and the processing information parameter of the determined processing step is calculated and the shape in the processing step is created. In addition, there is an effect that it can be created automatically.

According to a thirteenth aspect of the present invention, in the invention of the twelfth aspect, when there are a plurality of the same processing parts and the processing step for each of the processing parts is set in the processing step procedure information, Since the processing step procedure information is extended by the number of pieces, there is an effect that efficient processing can be realized.

According to a fourteenth aspect of the present invention, in the case of the thirteenth aspect, when a plurality of processing methods for a processing part are set in the processing step procedure information, the evaluation indices of the respective processing methods are compared with each other to determine an optimum evaluation method. Since a processing method having an index is selected, there is an effect that efficient processing can be realized.

According to a fifteenth aspect, in the fourteenth aspect, the evaluation index is a machining time required for machining, and the machining time is calculated in a pseudo manner using the range of the machining portion and the machining information parameter. Thus, the same effect as that of the fourteenth aspect can be obtained.

According to a sixteenth aspect of the present invention, in the invention of the fourteenth aspect, the evaluation index is a processing cost required for processing, and the processing cost is calculated in a pseudo manner using the range of the processing part and the processing information parameter. Thus, the same effect as that of the fourteenth aspect can be obtained.

According to a seventeenth aspect, in the fourteenth aspect, the evaluation index is used as a cost of a tool used for machining.
Since the tool cost is simulated using the range of the processing part and the processing information parameter, the same effect as the invention of claim 14 is obtained.

The invention of claim 18 is the invention of claim 14, wherein the evaluation index is a load of a tool used for machining.
Since the tool load is calculated in a pseudo manner using the range of the processing part and the processing information parameter, the same effect as that of the fourteenth aspect can be obtained.

A nineteenth aspect of the present invention is the invention according to the twelfth aspect, wherein the degree of interference between the tool used for machining and the shape in the machining step is analyzed for each machining step, and the tool and the machining step are determined based on the analysis result. Since the interference with the shape in the step is avoided, there is an effect that efficient machining can be realized by avoiding the interference between the tool and the shape in the processing step.

According to a twentieth aspect of the present invention, in the nineteenth aspect, a plurality of types of tools used for the same machining are prepared, and a tool which does not interfere with the shape in the machining process is selected and used based on the analysis result. There is an effect that more efficient processing can be realized.

According to a twenty-first aspect of the present invention, in the twentieth aspect, information of the plurality of types of tools is registered in a database in advance, and the shape in the machining process is determined using information of each tool sequentially read from the database. Since the interference with the tool is verified and a tool that does not interfere is selected based on the verification result, the same effect as the twentieth aspect of the invention can be obtained.

According to a twenty-second aspect of the present invention, in the twentieth aspect, the amount of interference of each of the tools with the shape in the machining step is derived, and the mounting length of the tool to the numerically controlled machine tool is determined in accordance with the derived amount of interference. Is adjusted, so that the same effect as the twentieth aspect is obtained.

According to a twenty-third aspect, in the twenty-second aspect, information on the plurality of types of tools is registered in a database in advance, and any one of the plurality of types of tools is used as a temporary use tool. The amount of interference between the selection and the temporary use tool and the shape in the above-mentioned machining process is derived, and the interference amount is added to the outer dimensions of the temporary use tool based on the information of each tool registered in the database. 22. Since a tool having an external size not smaller than that is selected.
The same effect as that of the invention is achieved.

According to a twenty-fourth aspect of the present invention, in the twenty-second aspect, any one of the plurality of types of tools is selected as a temporary use tool, and the interference between the temporary use tool and the shape in the machining step. Since the amount of interference is derived and the amount of interference is added to the outer dimensions of the temporary tool to be used to calculate the length of attachment of the tool to the numerically controlled machine tool, the same effect as the invention of claim 22 is achieved.

[0187] According to a twenty-fifth aspect of the present invention, in the twentieth aspect of the present invention, an interference portion with the shape of each of the tools in the machining step is derived, and a tool mounting portion for the numerically controlled machine tool is determined according to the derived interference portion. Since the diameter is adjusted, the same effect as that of the twentieth aspect is obtained.

According to a twenty-sixth aspect, in the twenty-fifth aspect, information on the plurality of types of tools is registered in a database in advance, and any one of the plurality of types is designated as a temporary use tool. Select and derive an interference part between the temporary tool and the shape in the above-mentioned processing step, and determine a mounting part diameter capable of avoiding interference based on the information of the interference part and the information of each tool registered in the database. Since the tool to be used is selected, the same effect as that of the twenty-fifth aspect of the invention can be obtained.

According to a twenty-seventh aspect of the present invention, in the twenty-fifth aspect of the present invention, any one of the plurality of types of tools is selected as a temporary use tool, and the interference between the temporary use tool and the shape in the machining step. Since the part is derived and the diameter of the attachment part capable of avoiding the interference is calculated using the information on the interference part, the same effect as the invention of claim 25 is obtained.

According to a twenty-eighth aspect of the present invention, in the twentieth aspect, the amount of interference of each of the tools with the shape in the machining step is derived, and the length of the tool attached to the numerically controlled machine tool is determined according to the derived amount of interference. While adjusting the, to derive the interference site with the shape of the above tools in the above machining process,
Since the diameter of the mounting portion of the tool with respect to the numerically controlled machine tool is adjusted according to the derived interference portion, the same effect as the twentieth aspect is achieved.

According to a twenty-ninth aspect, in the nineteenth aspect, each of the processing steps is divided into a plurality of sub-processing steps,
Since a tool that can avoid interference is selected for each sub-machining process,
There is an effect that more efficient processing can be realized.

[0192] According to a thirtieth aspect of the present invention, in the twenty-ninth aspect of the present invention, in each of the machining steps, a depth that can be machined by avoiding interference with one type of tool is calculated, and the machining step performed with the one type of tool is performed. Is defined as one sub-machining step.
The same effect as that of the ninth aspect is obtained.

According to a thirty-first aspect of the present invention, in the invention of the twenty-ninth aspect, information of a plurality of types of tools having different workable depths is registered in a database in advance, and is registered in the database in each of the above-described machining steps. One of multiple types
Calculate the depth that can be processed by avoiding interference with different types of tools,
The machining process performed with the one type of tool is defined as one sub-machining process, and one of a plurality of types of tools registered in the database for each sub-machining process until a desired machining depth is reached. Is selected, the same effect as that of the twenty-ninth aspect can be obtained.

[0194] According to a thirty-second aspect of the present invention, in the thirty-first aspect, a machining distance that can be machined by the one kind of tool is calculated, and if the machining distance exceeds a limit value, another kind of tool is added to the database. Therefore, the same effect as the invention of claim 31 is obtained.

A thirty-third aspect of the present invention is the invention according to the thirty-first aspect, wherein a tool load that can be machined by the one type of tool is calculated, and another type of tool is stored in the database when the tool load exceeds a limit value. Therefore, the same effect as the invention of claim 31 is obtained.

According to a thirty-fourth aspect of the present invention, in the nineteenth aspect, a plurality of types of tools used for the same machining are prepared, and a tool that does not interfere with the shape in the machining process is selected and used based on the analysis result. Since each processing step is divided into a plurality of sub-processing steps and a tool capable of avoiding interference is selected for each sub-processing step, there is an effect that more efficient processing can be realized.

According to a thirty-fifth aspect of the present invention, since the fifth aspect of the present invention has a fifth procedure for interactively confirming the process procedure included in the processing information and the processing information parameter in each step, the numerical control is performed. There is an effect that data can be created more accurately.

According to a thirty-sixth aspect, in the thirty-fifth aspect, in the fifth process, the shape of the work-in-progress of the workpiece is pseudo-created for each of the steps and displayed stepwise. There is an effect that the processing result can be grasped three-dimensionally.

The invention of claim 37 is the invention of claim 36, wherein the shape of the work-in-progress is compared with the shape of the workpiece.
Since the shape model of only the unprocessed portion in the work-in-progress is created and displayed, there is an effect that the unprocessed portion can be easily grasped.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating a numerical control data creation method according to the present invention.

FIG. 2 is a block diagram showing a numerical control data creation device for implementing the numerical control data creation method of the present invention.

FIG. 3 is a flowchart showing a part of the above.

FIGS. 4A to 4C are explanatory diagrams of the above.

FIG. 5 is an explanatory diagram of the above.

FIG. 6A is a perspective view of a workpiece, and FIG. 6B is a graph showing the workpiece.

FIG. 7 is an explanatory diagram of the above.

FIG. 8 is an explanatory diagram of the above.

FIG. 9 is a flowchart showing a part of the above.

FIG. 10 is a flowchart showing a part of the above.

FIG. 11 is a flowchart showing a part of the above.

FIG. 12 is an explanatory diagram of the above.

FIG. 13 is an explanatory diagram of the above.

FIG. 14 is an explanatory diagram of the above.

FIG. 15 is an explanatory diagram of a data table in the above.

FIG. 16 is a flowchart showing a part of the above.

FIG. 17 is an explanatory diagram of the above.

FIG. 18 is an explanatory diagram of the above.

FIG. 19 is an explanatory diagram of the above.

20A is a perspective view of a workpiece, and FIG. 20B is a graph showing the workpiece.

21A is a perspective view of a workpiece, and FIG. 21B is a graph showing the workpiece.

FIG. 22 is an explanatory diagram of the above.

23A is a perspective view of a workpiece, and FIG. 23B is a graph showing the workpiece.

24A is a perspective view of a workpiece, and FIG. 24B is a graph showing the workpiece.

FIG. 25 is a flowchart showing a characteristic portion of the second embodiment.

FIG. 26 is an explanatory diagram of the above.

FIG. 27 is an explanatory diagram of a characteristic portion of the third embodiment.

FIG. 28 is a flowchart showing a characteristic portion of the above.

FIG. 29 is an explanatory diagram of the above.

FIG. 30 is an explanatory diagram of a characteristic portion of the fourth embodiment.

FIG. 31 is a flowchart showing a characteristic portion of the above.

FIG. 32 is an explanatory diagram of a characteristic portion of the fifth embodiment.

FIG. 33 is a flowchart showing a characteristic portion of the above.

FIG. 34 is a flowchart showing a characteristic portion of the sixth embodiment.

FIG. 35 is an explanatory diagram of the above.

FIG. 36 (a) is a perspective view of a workpiece in the seventh embodiment, and FIG. 36 (b) is a graph showing the workpiece.

FIG. 37 is a flowchart showing a characteristic portion of the seventh embodiment.

FIG. 38 is an explanatory diagram of the above.

FIG. 39 is an explanatory diagram of a characteristic portion of the eighth embodiment.

FIG. 40 is a flowchart showing a characteristic portion of the above.

FIG. 41 is an explanatory diagram of the above.

FIG. 42 is an explanatory diagram of a characteristic portion of the ninth embodiment.

FIG. 43 is an explanatory diagram of the above.

FIG. 44 is a flowchart showing a characteristic portion of the above.

FIG. 45 is an explanatory diagram of a characteristic portion of the tenth embodiment.

FIG. 46 is a flowchart showing a characteristic portion of the above.

FIG. 47 is an explanatory diagram of a characteristic portion of the eleventh embodiment.

FIG. 48 is a flowchart showing a characteristic portion of the above.

FIG. 49 is an explanatory view of the above.

FIG. 50 is a flowchart showing a characteristic portion of the twelfth embodiment.

FIG. 51 is a flowchart showing a characteristic portion of the above.

FIG. 52 is an explanatory view of the above.

FIG. 53 is an explanatory view of the above.

FIG. 54 is a flowchart showing a characteristic portion of the thirteenth embodiment.

FIG. 55 is a flowchart showing a characteristic portion of the fourteenth embodiment.

FIG. 56 is a flowchart showing a characteristic portion of the fifteenth embodiment.

FIG. 57 is an explanatory diagram of the above.

FIG. 58 is a flowchart showing a characteristic portion of the sixteenth embodiment.

FIG. 59 is an explanatory diagram of the above.

FIG. 60 is an explanatory diagram of the tool in the above.

FIG. 61 is an explanatory diagram of the tool and the machine tool in the above.

FIG. 62 is an explanatory view of the above.

FIG. 63 is a flowchart showing a characteristic portion of the seventeenth embodiment.

FIG. 64 is an explanatory view of the above.

FIG. 65 is a flowchart showing a characteristic portion of the eighteenth embodiment.

FIG. 66 is a flowchart showing a characteristic portion of the nineteenth embodiment.

FIG. 67 is a flowchart showing a characteristic portion of the twentieth embodiment.

FIG. 68 is a flowchart showing a characteristic portion of the twenty-first embodiment.

FIG. 69 is a flowchart showing a characteristic part of the twenty-second embodiment.

FIG. 70 is a flowchart showing a characteristic portion of the twenty-third embodiment.

FIG. 71 is an explanatory view of the above.

FIG. 72 is a flowchart showing a characteristic portion of the twenty-fourth embodiment.

FIG. 73 is an explanatory view of the above.

FIG. 74 is a flowchart showing a characteristic portion of the twenty-fifth embodiment.

FIG. 75 is a flowchart showing a characteristic portion of the above.

FIG. 76 is an explanatory view of the above.

Fig. 77 is an explanatory view of the above.

FIG. 78 is an explanatory view of the above.

FIG. 79 is a flowchart showing a characteristic portion of the twenty-sixth embodiment.

FIG. 80 is an explanatory diagram of the above.

FIG. 81 is a flowchart showing a characteristic portion of the twenty-seventh embodiment.

FIG. 82 is a flowchart showing a characteristic portion of the twenty-eighth embodiment.

FIG. 83 is a flowchart showing the characteristic portions of Embodiment 29.

FIG. 84 is a flow chart showing a characteristic portion of the thirtieth embodiment.

FIG. 85 is an explanatory diagram for describing a conventional technique.

FIG. 86 is a perspective view showing an example of a workpiece.

[Explanation of symbols]

 1 CAD data importing means 2 Joining relation information creating means 3 Collating means 4 Database 5 Processing information creating means 6 Display means

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kazuyuki Kazuma, Kazuma, Osaka 1048, Kadoma, Matsushita Electric Works, Ltd. (72) Inventor Akira Inoue 1048 Kadoma, Kazuma, Osaka Pref. Matsushita Electric Works, Ltd. (72) Inventor Tatsuya Yamada 1048 Kadoma, Kazuma, Kadoma, Osaka Pref. BB07 EE11 QB15

Claims (37)

[Claims] 1. A numerical control data generating method for generating numerical control data for processing a workpiece by a numerically controlled machine tool, the method comprising: creating a surface representing the shape of the workpiece from three-dimensional CAD data on the workpiece; The first processing for capturing the surface information including the expression and the expression for the outline of the surface is compared with the expression for the outline of each of the captured surfaces. A second process of creating joining relationship information indicating that the surfaces are joined, and matching the joining relationship information with the joining relationship information of the surfaces of the standard model of the machining shape registered in advance, and matching the two. In this case, the above processing is performed by the third processing for setting the relevant part as a processing part and the processing information creation procedure registered in advance and the processing information parameters set for each standard model of the processing shape. And a fourth process for creating machining information of the machined portion that has been processed. 2. In the second processing, a number assigned to each surface, information on an expression of each surface, a list of the numbers of surfaces to be joined to each surface, information on an expression of a ridge to be joined, and joining 2. The numerical control data creating method according to claim 1, wherein the joining relation information is expressed by a joining angle between the two surfaces. 3. In the second processing, surface information of the material having an expression of a surface representing a material shape before processing and an expression of a surface contour are fetched from three-dimensional CAD data, and the surface information of the material is obtained. 2. The numerical control data creating method according to claim 1, wherein only the connection relation information of the surface of the workpiece located below is set as a processing target after the third processing. 4. When the surface representing the shape of the workpiece taken in the first processing is a free-form surface, the z component of a normal vector of a point group uniformly generated at a predetermined interval on the surface. 2. The numerical control data creation method according to claim 1, wherein the point group within the predetermined range is combined, and a portion obtained by dividing the surface at the boundary of the point group is added to a processing target after the second processing. Method. 5. The method according to claim 1, wherein before the second processing, expressions of contours on each surface of the workpiece are compared, and a plurality of adjacent contours having the same expression are grouped. 2. The numerical control data creation method according to claim 1, wherein the surface information is recreated. 6. In the second processing, the expressions of the respective surfaces of the workpiece are compared, and a plurality of adjacent surfaces having the same expression are grouped to form a surface of the workpiece. 2. The method according to claim 1, wherein the joining relation information is recreated. 7. In the grouping described above, an arbitrary surface is set as a reference surface, and a surface having a joint relationship with the reference surface is set as a comparison target surface. In this case, the comparison target surface is grouped with the reference surface, and the comparison target surface is newly set as the reference surface, and the surface information is compared between the reference surface and the comparison target surface in a joining relationship, and the grouping is performed. 7. The method according to claim 6, wherein a possible surface is searched. 8. Prior to the third processing, joining relation information of a shape irrelevant to the creation of the processing information registered in advance is searched for from the joining relation information of the workpiece, and deleted.
2. The numerical control data creation method according to claim 1, wherein the joining relation information of the workpiece is recreated. 9. The method according to claim 1, wherein, prior to the third processing, the plurality of surfaces having a z-component of a normal vector within a predetermined range and having a bonding relationship with each other are grouped based on the bonding relationship information. 2. The method according to claim 1, wherein an inclined surface of the object is defined. 10. When each of the surfaces belonging to the group of two adjacent inclined surfaces adjacent to each other is in a valley-bent joint state at an angle within a predetermined range, the ridge line of the joint portion is set as a valley shape. The numerical control data creation method according to claim 9, wherein 11. Prior to the third processing, a plurality of surfaces having a z-component of a normal vector of zero and having a connection relationship with each other are grouped as vertical surfaces based on the connection relationship information, and the normal vector 2. The horizontal plane is set as the processing part when the horizontal plane having zero and no x component and y component is joined to the plurality of vertical planes in a valley bent state. How to create numerical control data. 12. In the fourth processing, processing step procedure information indicating a processing order of the processing information parameter is provided.
A processing step that matches the shape of the workpiece is determined by collating with the processing part set in the third process, and a processing information parameter of the determined processing step is calculated, and at the same time, a shape in the processing step is created. 2. The numerical control data creation method according to claim 1, wherein: 13. When there are a plurality of the same processing parts and a processing step for each processing part is set in the processing step procedure information, the processing step procedure information is extended by the number of the processing parts. 13. The method according to claim 12, wherein
The numerical control data creation method described. 14. When a plurality of processing methods for a processing portion are set in the processing step procedure information, evaluation indexes in each processing method are compared with each other, and a processing method having an optimum evaluation index is selected. 14. The numerical control data creation method according to claim 13. 15. The numerical control data according to claim 14, wherein the evaluation index is a processing time required for processing, and the processing time is calculated in a pseudo manner using the range of the processing part and the processing information parameter. How to make. 16. The numerical control data according to claim 14, wherein said evaluation index is a machining cost required for machining, and said machining cost is simulated using said range of machining portion and machining information parameter. How to make. 17. The numerical control according to claim 14, wherein the evaluation index is the cost of a tool used for machining, and the tool cost is calculated in a pseudo manner using the range of the machining portion and machining information parameters. Data creation method. 18. The numerical control according to claim 14, wherein the evaluation index is a load of a tool used for machining, and the tool load is simulated using the range of the machining portion and machining information parameters. Data creation method. 19. A method of analyzing interference between a tool used for machining and a shape in the machining process for each machining process, and avoiding interference between the tool and the shape in the machining process based on an analysis result. 13. The method for creating numerical control data according to claim 12. 20. Numerical control data generation according to claim 19, wherein a plurality of types of tools used for the same machining are prepared, and a tool that does not interfere with the shape in the machining process is selected and used based on the analysis result. Method. 21. Information of the plurality of types of tools is registered in a database in advance, interference with a shape in the machining process is verified using information of each tool sequentially read from the database, and based on the verification result. 21. The numerical control data creation method according to claim 20, wherein a tool that does not interfere with the tool is selected. 22. The method according to claim 20, wherein an amount of interference of each of the tools with the shape in the machining step is derived, and a mounting length of the tool to the numerically controlled machine tool is adjusted according to the derived amount of interference. How to create numerical control data. 23. Information of the plurality of types of tools is registered in a database in advance, and any one of the plurality of types of tools is selected as a temporary use tool, and the temporary use tool and the machining process are selected. Deriving an interference amount with a shape, and selecting a tool having an outer dimension that is not smaller than that obtained by adding the interference amount to the outer dimension of the temporary use tool based on information of each tool registered in the database. 23. The numerical control data creation method according to claim 22, wherein: 24. An arbitrarily selected tool is selected from among the plurality of types as a temporary use tool, and an interference amount between the temporary use tool and the shape in the machining step is derived. 23. The numerical control data creating method according to claim 22, wherein the length of attachment of the tool to the numerically controlled machine tool is calculated by adding the length to the external dimensions of the tool to be used. 25. An interference part with the shape of each of the tools in the machining step is derived, and a diameter of a mounting portion of the tool to the numerical control machine tool is adjusted according to the derived interference part. 20. The numerical control data creation method according to item 20. 26. Information of the plurality of types of tools is registered in a database in advance, and any one of the plurality of types of tools is selected as a tentative use tool, and the tentative use tool and the machining process are selected. Deriving the interference part with the shape,
26. The numerical control data creating method according to claim 25, wherein a tool having an attachment portion diameter capable of avoiding interference is selected based on the information on the interference part and information on each tool registered in the database. 27. An arbitrary tool is selected from among the plurality of types as a temporary use tool, an interference portion between the temporary use tool and the shape in the machining step is derived, and information on the interference portion is used. 26. The numerical control data creation method according to claim 25, wherein the diameter of the attachment portion capable of avoiding interference is calculated by using the method. 28. An interference amount between each of the tools and the shape in the machining step is derived, and a mounting length of the tool to the numerically controlled machine tool is adjusted according to the derived interference amount.
21. The numerical control according to claim 20, wherein an interference portion of the tool with the shape in the machining step is derived, and a diameter of a mounting portion of the tool to the numerical control machine tool is adjusted according to the derived interference portion. Data creation method. 29. The method according to claim 19, wherein each machining step is divided into a plurality of sub-machining steps, and a tool capable of avoiding interference is selected for each sub-machining step. 30. The method according to claim 30, wherein in each of the machining steps, a depth that can be machined by one type of tool while avoiding interference is calculated, and the machining step performed by the one type of tool is defined as one sub-machining step. 30. The method of creating numerical control data according to claim 29. 31. Information of a plurality of types of tools having different processable depths is registered in a database in advance, and interference in one of the plurality of types of tools registered in the database in each of the above-mentioned processing steps. By calculating the depth that can be processed by avoiding it, the processing step performed with the one type of tool is regarded as one sub-processing step, and is registered in the database for each sub-processing step until the desired processing depth is reached. 30. The method according to claim 29, wherein one type of tool is selected from a plurality of types of tools. 32. The method according to claim 31, wherein a machining distance that can be machined by the one kind of tool is calculated, and another kind of tool is selected from a database when the machining distance exceeds a limit value. How to create numerical control data. 33. The method according to claim 31, wherein a tool load that can be machined by the one type of tool is calculated, and another type of tool is selected from a database when the tool load exceeds a limit value. How to create numerical control data. 34. A plurality of types of tools used for the same machining are prepared, a tool that does not interfere with the shape in the machining process is selected and used based on the analysis result, and each machining process is divided into a plurality of sub-machining processes. 20. The numerical control data creation method according to claim 19, wherein a tool capable of avoiding interference is selected for each sub-machining step. 35. A process procedure included in the processing information,
Fifth interactive confirmation of machining information parameters in each process
2. The method according to claim 1, further comprising the step of: 36. The numerical control data generation according to claim 35, wherein in the fifth processing, the shape of the work-in-progress of the workpiece is pseudo-created and displayed stepwise for each of the steps. Method. 37. Numerical control data creation according to claim 36, wherein the shape of the work-in-progress and the shape of the workpiece are compared, and a shape model of only an unprocessed portion in the work-in-progress is created and displayed. Method.