KR101178702B1 - Program creation device, numeric control device,and program creation method - Google Patents

Abstract

In the NC programming support apparatus for creating an NC machining program in which dimensional tolerance data is reflected in shape data of a workpiece, a machining target dimension calculation unit (5) for calculating a machining target dimension of the workpiece based on the shape data and the dimensional tolerance data (5). ) And deformation of the shape data which sets the movement position of the figure element such that the dimension between the figure elements included in the shape data is the machining target dimension based on the position movement information, the machining target dimension and the shape data relating to the method of moving the figure element. And a processing unit 6 and an NC processing program generation processing unit 7 which creates an NC processing program using the shape data and the movement position of each figure element.

Description

Program writing device, numerical control device and program writing method {PROGRAM CREATION DEVICE, NUMERIC CONTROL DEVICE, AND PROGRAM CREATION METHOD}

The present invention relates to a program preparation device, a numerical control device and a program creation method for creating an NC machining program for numerical control of a machine tool.

In the numerically controlled machine tools that faithfully and precisely process machining as instructed by the NC machining program, how easy and efficient is the NC machining program that produces machining results as designed by the designer of the workpiece? It becomes important from the viewpoint of quality control and productivity.

In recent years, the NC program creation support function of the program generating apparatus has been improved, and the operator can easily create an NC machining program by setting the coordinate values of the workpiece while viewing the production drawing. In addition, devices that allow designers to directly read CAD data modeled using a CAD system into a program creation device and create an NC processing program have emerged.

By the way, in the machining of parts related to functions and performances as products of workpieces such as fittings and dimensional tolerances, it is necessary to reflect the machining target dimensions including fittings and dimensional tolerances in the NC machining program. There is. In particular, in asymmetrical fittings or dimensional tolerances in which the upper and lower (dimension upper limit and lower limit) are asymmetrically biased to one side (upper limit or lower limit), the machining target dimension may be different from the standard dimension.

In the case of programming (correcting) the NC machining program directly while viewing the production drawing, the operator calculates the machining target dimension by hand calculation or calculator, and inputs the corrected coordinate values into the NC machining program based on the calculation result. The method was adopted. In this method, it is easy to cause a calculation mistake or an input mistake because the modification of the NC machining program is complicated, and there is a problem that the reliability of the created NC machining program is insufficient.

For this reason, a method has been proposed in which the standard dimension and the tolerance information (dimension tolerance, etc.) can be directly described in the NC machining program, and the numerical control device performs the machining process based on the described information.

For example, the numerical control device described in Patent Literature 1 stores in advance the dimension tolerance data based on the reference dimension of the fitting and the tolerance area class. The center position of the tolerance area is calculated from the command indicating the reference dimension and the tolerance area class of the fitting of the workpiece commanded on the machining program, and the stored dimension tolerance data corresponding to this command. A festival fish is used as a command for moving the control shaft. This allows the programmer to directly program the reference dimension and the tolerance area class of the fitting site recorded on the machining drawing.

In addition, the automatic fitting corrector of the numerical control device described in Patent Literature 2 detects a fitting symbol embedded in a predetermined bound symbol in the NC instruction program, and simultaneously measures a dimension and an NC instruction corresponding to the fitting symbol. The cutting dimension is calculated from the dimensions in the program.

In the machining control method described in Patent Literature 3, when the dimension tolerance is indicated by a specific value in the dimension tolerance area designation area in the machining program, the machining target dimension is determined based on the numerical value and indicated by a fitting code. In this case, the machining target dimension is determined by searching the dimension tolerance table.

[Patent Document 1] Japanese Patent Application Laid-Open No. 4-245305

[Patent Document 2] Japanese Patent Application Laid-Open No. 61-15204

[Patent Document 3] Japanese Patent Application Laid-Open No. 60-201860

Problems to be Solved by the Invention

However, in the first to the third prior arts, the case where the processing target surface of the dimension to be calculated is single, and the tolerance information and the machining instruction unit correspond one-to-one, and the point describing the standard dimension and the tolerance information The central position can only be calculated if it can be localized. For this reason, the NC machining program can only be used when tolerance information is specified for the diameter of the cylindrical surface, for example, fitting of an axis or a hole, or when tolerance information is specified for a relative dimension from an absolute reference position (program origin, etc.). There was a problem that the standard dimensions and tolerance information could not be described directly. In other words, there is a problem that reference dimensions and tolerance information cannot be directly described in the NC machining program when a plurality of machining target surfaces, such as the distance between the surfaces, are involved. In addition, when an operator carefully analyzes the drawings and appropriately distributes and describes the tolerances, there is a problem that the processing of the operator becomes complicated.

When the program generating apparatus has a function of reading the CAD data and creating an NC machining program, a method of modeling the shape of the object to be processed with a machining target dimension in which a tolerance is expected in advance is employed. This method forces the designer or CAD data creator to calculate the machining target dimension and input it into the NC machining program, which is not an inherent solution. In addition, there is a problem that there is a possibility that a NC machining program that produces a machining result that is not intended by the designer may be created because the reference dimension, which is meaningful in design, is lost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and a program creation device, a numerical control device, and a program creation that can easily create an NC machining program reflecting the design intention shown in the dimensional tolerance even when a plurality of machining target surfaces are involved. The purpose is to get a way.

MEANS FOR SOLVING THE PROBLEMS [

MEANS TO SOLVE THE PROBLEM In order to solve the above-mentioned subject and achieve the objective, this invention produces the program which produces the NC machining program which reflects the said dimension tolerance data to the said shape data based on the shape data of the object to be processed and the dimension tolerance data of the said shape data. An apparatus, comprising: a machining target dimension calculating section for calculating a machining target dimension of the workpiece based on the shape data and the dimensional tolerance data; and a machining target dimension calculated by the machining target dimension calculating section and the shape data. And a shape data deformation processing unit for setting the movement position of the shape elements so that the size between the shape elements included in the shape data becomes a size corresponding to the processing target dimension, and the shape data and the shape data deformation processing unit are set. Machining to create NC machining program using the movement position of each figure element And a program preparation unit, wherein the dimension tolerance data includes position movement information about a method of moving the figure element, and wherein the shape data deformation processing unit sets the movement position of the figure element based on the position movement information. It features.

EFFECTS OF THE INVENTION [

The program generating apparatus according to the present invention sets the movement positions of the figure elements so that the dimensions between the figure elements included in the shape data are the target machining dimensions based on the position movement information on the method of moving the figure elements. Even if a face is involved, it is possible to easily create an NC machining program that reflects a dimensional tolerance.

1 is a block diagram showing the configuration of an NC programming support apparatus according to the first embodiment.

2 is a diagram illustrating an example of the configuration of a dimension tolerance data table.

FIG. 3 is a diagram for explaining the movement deformation method of shape data when the adjustment mode is "element 1 fixed".

4 is a diagram for explaining a method of transforming movement of shape data when the adjustment mode is "center fixed".

FIG. 5 is a diagram for explaining the movement deformation method of shape data when the adjustment mode is "automatic".

Fig. 6 is a diagram showing an example of the object to be processed and the dimension tolerance data.

FIG. 7 is a diagram illustrating a configuration of a dimension tolerance data table having an asymmetric dimension tolerance among the dimensions shown in FIG. 6.

8 is a flowchart showing the operation procedure of the NC programming support apparatus according to Embodiment 1 of the present invention.

9 is a flowchart showing the deformation processing procedure of figure elements for each group.

Fig. 10 is a block diagram showing the structure of the NC programming support apparatus according to Embodiment 2 of the present invention.

It is a figure which shows an example of the structure of a viscosity data table.

12 is a diagram for explaining a method of moving deformation of viscosity data.

It is a figure for demonstrating the movement deformation method of the figure element group which concerns on a viscosity form.

It is a figure which shows an example of the structure of a machine tool.

<Code description>

1 CAD data input section

2 Shape Data Preservation Section

3 Conversation processing part

4 Dimensional tolerance data storage

5 Machining target dimension calculation part

6 Shape Data Deformation Processing Unit

7 NC machining program generation processing part

8 display

9 instruction input

10 Viscosity Data Preservation Section

20 CAD data

30 NC machining program

51, 52 Dimensional Tolerance Data Table

53 Viscosity Data Table

61 ~ 63 shape data

101, 102 Programmable Supporting Device

110 control unit

150 numerical control unit

201 Machine Tool

205 machining

210 Workpiece

301A, 302A, 302B, 401A, 401B, 402A, 402B, 501A, 501B, 502A, 502B, 503A, 601A to 605A, 607A to 609A, 701A to 704A

801A, 801B Viscosity Type

BEST MODE FOR CARRYING OUT THE INVENTION [

EMBODIMENT OF THE INVENTION Below, embodiment of the program preparation apparatus, the numerical control apparatus, and the program preparation method which concern on this invention is described in detail based on drawing. In addition, this invention is not limited by this embodiment.

Embodiment 1

1 is a block diagram showing the configuration of an NC programming support apparatus according to Embodiment 1 of the present invention. The NC programming support device (programmer) 101 includes a CAD data input unit 1, a shape data storage unit 2, an interactive operation processing unit 3, a dimension tolerance data storage unit 4, and a machining target dimension calculation unit ( 5), the shape data deformation processing unit 6, the NC processing program generating processing unit (processing program preparing unit) 7, the display unit 8, and the instruction input unit 9 are included.

The CAD data input unit 1 inputs the CAD data 20 from an external device such as a CAD data creating device or a CAD data storage device, and sends the CAD data 20 to the shape data storage unit 2. The CAD data 20 is configured to include shape data (reference dimension of the object to be processed) created using a CAD system or the like, data on dimensional tolerances set on the CAD system, and the like. The shape data storage section 2 is a storage means such as a memory for storing the CAD data 20 from the CAD data input section 1.

The display unit 8 is a display terminal such as a liquid crystal monitor and displays CAD data 20, figure elements of shape data designated by the user, dimensional tolerance data input by the user, and the like.

The instruction input section 9 includes a mouse and a keyboard, and inputs instruction information (such as an adjustment mode described later), dimension tolerance data, and the like from the user. Input instruction information, dimension tolerance data, and the like are sent to the interactive operation processing unit 3.

The interactive operation processing unit 3 displays the CAD data 20 stored in the shape data storage unit 2 on the display unit 8 and inputs the instruction information from the instruction input unit 9. The interactive operation processing unit 3 receives, for example, from the instruction input unit 9 the figure element of the shape data designated by the operator by the mouse or the like and the dimension tolerance data corresponding to the figure element input by the operator from the keyboard. On the basis of the instruction information from the instruction input section 9, the interactive operation processing section 3 associates the figure element of the shape data of the CAD data 20 with the dimension tolerance data, and corresponds to the corresponding data (dimension tolerance data described later). The table 51 is stored in the dimension tolerance data storage section 4. The dimension tolerance data storage section 4 is a storage means such as a memory for storing the dimension tolerance data table 51 from the interactive operation processing section 3.

The machining target dimension calculation unit 5 reads the dimensional tolerance data table 51 stored in the dimensional tolerance data storage unit 4, and calculates the machining target dimension using the standard dimension and the dimensional tolerance. The machining target dimension calculating section 5 inputs the calculated machining target dimension into the shape data deformation processing section 6.

The shape data deformation processing unit 6 uses the calculation result (machining target dimension) of the machining target dimension calculation unit 5 and the shape data and the adjustment mode stored in the shape data storage unit 2 to adjust the dimensional tolerances among the shape data. The amount of movement of each figure element related to the data is calculated, and the shape data is deformed (moving the position of the figure element) to satisfy the machining target dimension. The shape data deformation processing unit 6 inputs the shape data after deformation into the NC processing program generation processing unit 7. The NC machining program generation processor 7 generates the NC machining program 30 based on the position of each figure element of the deformed shape data and outputs it externally.

Here, the structure of the dimension tolerance data table 51 stored in the dimension tolerance data storage part 4 is demonstrated. 2 is a diagram illustrating an example of the configuration of a dimension tolerance data table. The dimension tolerance data table 51 includes information for identifying the dimension tolerance data ("No."), "shape element 1", "shape element 2", "dimension type", "reference dimension", " The upper limit dimension tolerance ", the" lower limit dimension tolerance ", and the" adjustment mode "are corresponding information tables, respectively. In the dimension tolerance data table 51, each row represents one dimension tolerance data.

The fields of the shape element 1 and the shape element 2 indicate a combination of figure elements or figure elements to which the dimension tolerance data are set, and figure elements of the shape data stored in the shape data storage section 2. It corresponds to the ID ("No.") of (plane, ridge, vertex, etc.). The field of "shape element 1" represents one figure element constituting the shape data, and the field of "shape element 2" represents the other figure element constituting the shape data.

In the case of dimensional tolerances for the diameter of the axis or hole such as the fitting, this dimensional tolerance is defined in "Shape 1", and the field of "Shape 2" is ignored. The field "Dimension type" is information indicating whether the type of the dimension of the dimension tolerance data is one of a distance, an angle, a diameter, and the like.

A field of "reference dimension" shows the reference dimension of the figure element (such as the dimension extracted from the CAD data 20). The fields of "upper limit tolerance" and "lower limit tolerance" indicate the difference between the upper and lower allowable dimensions (the upper limit allowable dimension and the lower limit allowable aberration) from the "standard dimension" of the dimensional tolerance data.

The field of "Adjustment mode" is a main feature of the present invention and is a movement deformation method (method for deforming the shape data) when moving the figure element based on the dimensional tolerance data (position movement about the method of moving the figure element). Information). "Adjustment mode" shows any one of "element 1 fixed", "element 2 fixed", "center fixed", and "automatic", for example.

"Element 1 fixing" is a method of fixing "shape element 1" and moving "shape element 2", and "fixing element 2" is a method of fixing "shape element 2" and moving of "shape element 1". "Central fixation" is a method of fixing the center between "shape element 1" and "shape element 2" and moving "shape element 1" and "shape element 2" evenly, and "automatic" means "shape element 1". ”And` `figure 2 '' move by any one of` `fix element 1 '',` `fix element 2 '', or` `center fix ''. How to move figure elements

When a single figure element is targeted, such as a fitting, the field of "adjustment mode" is ignored. The field of "adjustment mode" is input from the instruction | indication input part 9 by an operator etc. In addition to the "adjustment mode", "shape element 1", "shape element 2", "dimension type", "reference dimension", "upper limit tolerance", and "lower limit dimension tolerance" may be extracted from the CAD data 20, You may input from the instruction | indication input part 9 by an operator etc.

The machining target dimension calculated by the machining target dimension calculation unit 5 falls within a range satisfying the “standard dimension”, “upper limit tolerance” and “lower limit tolerance” stored in the dimensional tolerance data table 51. It is determined based on "standard dimension", "upper limit tolerance", and "lower limit tolerance". The machining target dimension calculation unit 5 calculates the machining target dimension based on, for example, Equation (1).

Machining target dimension = reference dimension + (upper limit tolerance + lower limit tolerance) / 2. (One)

Next, how the figure element of the dimension tolerance data is moved and deformed according to the type of "adjustment mode" and the process of creating the dimension tolerance data will be described with reference to FIGS. First, a description will be given of the movement deformation method when the "adjustment mode" of the dimensional tolerance data is "element 1 fixed". FIG. 3 is a diagram for explaining the movement deformation method of shape data when the adjustment mode is "element 1 fixed".

When the operator sets the dimension tolerance data for the ridge lines 301A (figure element 1) and 302A (figure element 2) of the shape data 61, if "element 1 fixed" is specified as the "adjustment mode", the interactive operation processing unit (3) creates dimension tolerance data D11 corresponding to the shape data 61.

Specifically, the interactive operation processing unit 3 extracts the ridge line 301A of the shape data 61 from the CAD data 20 as the dimension tolerance data D11, sets it to "shape element 1," and at the same time, the ridge line 302A is extracted from the CAD data 20 and set to "Figure 2". In addition, the dimension tolerance data D11 includes the "adjustment mode" of "fixed element 1" specified by the operator. The interactive operation processing section 3 stores the dimension tolerance data D11 corresponding to the shape data 61 of the CAD data 20 in the dimension tolerance data storage section 4.

When the shape data deformation processing unit 6 moves and deforms the ridge lines 301A and 302A so as to satisfy the machining target dimension, the shape data deformation processing unit 6 fixes the ridge lines 301A of the “shape element 1” without moving, and the ridge lines of the “shape element 2” ( 302A). The movement amount Δ at this time becomes a difference between the machining target dimension Y1 and the shape dimension before the deformation (the distance between the ridge line 301A before the movement deformation and the ridge line 302A) X1. The ridge line 302A of the shape data 61 becomes the ridge line 302B after the movement by the movement process of the movement amount Δ.

When "adjustment mode" is "element 2 fixed", it is the same as the process of "element 1 fixed" except that the position of fixation and movement of a figure element is reversed. In other words, in the case of "fixing element 2", the ridge line 302A of "shape element 2" is fixed without moving, and the ridge line 301A of "shape element 1" is moved.

Next, a description will be given of the movement deformation method when the "adjustment mode" of the dimensional tolerance data is "center fixed". FIG. 4 is a diagram for explaining a method of moving deformation of shape data when the adjustment mode is "center fixed".

When the operator sets the dimension tolerance data for the ridge lines 401A (figure 1) and 402A (figure 2) of the shape data 62, if "center fixed" is specified as the "adjustment mode", the interactive operation processing unit ( 3) creates dimension tolerance data D12 corresponding to the shape data 62.

Specifically, the interactive operation processing unit 3 extracts the ridge line 401A of the shape data 62 from the CAD data 20 as the dimension tolerance data D12, sets it to "shape element 1," and at the same time, the ridge line 402A is extracted from the CAD data 20 and set as "shape element 2". In addition, the dimension tolerance data D12 includes the "adjustment mode" of "center fixed" specified by the operator. The interactive operation processing section 3 stores the dimension tolerance data D12 corresponding to the shape data 62 of the CAD data 20 in the dimension tolerance data storage section 4.

When the shape data deformation processing unit 6 moves and deforms the ridge lines 401A and 402A to satisfy the machining target dimension of the dimension tolerance data D12, the shape data deformation processing unit 6 is fixed without moving the intermediate (center line) position of the ridge lines 401A and 402A. Then, the ridge line 401A of "shape element 1" and the ridge line 402A of "shape element 2" are moved by an equal amount. At this time, each shift amount Δ is half of the difference between the machining target dimension Y2 and the shape dimension before the deformation (the distance between the ridge line 401A and the ridge line 402A before the movement deformation) X2. The ridge line 401A of the shape data 62 becomes the ridge line 401B after the movement by the movement process of the movement amount Δ, and the ridge line 402A of the shape data 62 moves by the movement process of the movement amount Δ It becomes a subsequent ridge 402B.

Next, a description will be given of the movement deformation method when the "adjustment mode" of the dimensional tolerance data is "automatic". Fig. 5 is a diagram for explaining a method of transforming movement of shape data when the adjustment mode is "automatic".

It is assumed that the dimension tolerance data D13 for the ridge lines 502A and 503A are already stored in the dimension tolerance data storage unit 4. When the operator sets the dimension tolerance data for the ridge lines 501A (figure element 1) and 502A (figure element 2) of the shape data 63, if "automatic" is specified as the "adjustment mode", the interactive operation processing unit 3 ) Creates dimension tolerance data D14 corresponding to the shape data 63.

At this time, either the "shape element 1" field or the "shape element 2" field of the dimension tolerance data D14 is the same as any one of the figure elements in the dimension tolerance data D13. In the case of the shape data 63, the ridge line 502A and the ridge line 503A are included in the figure element of the dimension tolerance data D13, so that the shape element 63 or the figure element 2 of the dimension tolerance data D14 is included. Either field becomes a ridge 502A or a ridge 503A. In FIG. 5, the case where the "shape element 2" field of the dimension tolerance data D14 is the same value as the field of the "shape element 1" of the dimension tolerance data D13 is shown.

In the NC programming support device 101, the interactive operation processing section 3 first stores the dimension tolerance data D14 corresponding to the shape data 63 of the CAD data 20 in the dimension tolerance data storage section 4. At this time, the interactive operation processing unit 3 extracts the ridge line 501A of the shape data 63 from the CAD data 20 as the dimension tolerance data D14, sets it to "shape element 1," and at the same time, the ridge line 502A. ) Is extracted from the CAD data 20 and set as "Figure 2". In addition, the dimension tolerance data D14 includes the "automatic" adjustment mode specified by the operator. The interactive operation processing section 3 stores the dimension tolerance data D14 corresponding to the shape data 63 of the CAD data 20 in the dimension tolerance data storage section 4.

When the shape data deformation processing unit 6 moves and deforms the ridge lines 501A and 502A to satisfy the machining target dimension of the dimensional tolerance data D14, other dimensional tolerance data (here, dimensional tolerance data) The movement deformation of the dimension tolerance data D14 is suspended until the movement deformation of D13)) is completed.

When the movement deformation of the dimension tolerance data D13 ends, the shape data deformation processing unit 6 performs the movement deformation of the dimension tolerance data D14 while fixing the figure element of the dimension tolerance data D13 in which the movement deformation is completed. .

In the case of the shape data 63 shown in FIG. 5, since the dimensional tolerance data D13 is "element 2 fixed", the ridge line 503A of the "shape element 2" is fixed and the ridge line 502A of the "shape element 1". Move to make ridgeline 502B (s1). As a result, the machining target dimensions of &quot; shape element 1 &quot; and &quot; shape element 2 &quot; in the dimensional tolerance data D13 become the machining target dimension Y3 corresponding to the dimensional tolerance data D13.

After that, since the dimension tolerance data D14 is "automatic", "shape element 2" (ridgeline 502A) of the dimension tolerance data D14, such as "shape element 1" of the dimension tolerance data D13, is fixed. . Then, the "shape element 1" (ridgeline 501A) of the dimension tolerance data D14 is moved to the ridgeline 501B (s2). As a result, the machining target dimensions of "shape element 1" and "shape element 2" of the dimensional tolerance data D14 become the machining target dimension Y4 corresponding to the dimensional tolerance data D14.

In other words, in the present embodiment, the shape data deformation processing unit 6 is the figure element on the opposite side (ridge line 501A) so as to satisfy the machining target dimension with respect to the figure element (here, ridge line 502A) on the side of the movement deformation. Move and transform).

When the adjustment mode of the dimension tolerance data that does not share figure elements with other dimension tolerance data is "automatic", for example, "adjustment mode" = "fixed center" to equally move and deform figure elements on both sides. Treat it equally.

Next, the operation procedure of the NC programming support apparatus concerning Embodiment 1 is demonstrated with reference to FIGS. Fig. 6 is a diagram showing an example of the object to be processed and the dimension tolerance data. In FIG. 6, five dimensions and the dimension tolerance designated by the designer of a process target shape are shown as an example, and other dimensions are abbreviate | omitted for convenience of description.

The object to be processed in FIG. 6 includes ridge lines 601A to 605A and 607A to 609A. The "reference dimension" (distance) between the ridge line 601A and the ridge line 603A is 80.0 (mm), the "upper limit tolerance" is +0.05, and the "lower limit dimension tolerance" is +0.01. The "reference dimension" between the ridge line 602A and the ridge line 603A is 40.0, the "upper limit tolerance" is +0.03, and the "lower limit dimension tolerance" is -0.01.

The "reference dimension" between the ridgeline 604A and the ridgeline 605A is 35.0, the "upper limit tolerance" is +0.03, and the "lower limit dimension tolerance" is +0.01. The "reference dimension" between the ridge line 607A and the ridge line 608A is 25.0, the "upper limit tolerance" is +0.03, and the "lower limit dimension tolerance" is +0.01. The "reference dimension" between the ridgeline 608A and the ridgeline 609A is 70.0, the "upper limit tolerance" is +0.03, and the "lower limit tolerance" is -0.03.

FIG. 7 is a diagram illustrating a configuration of a dimension tolerance data table having an asymmetric dimension tolerance among the dimensions shown in FIG. 6. In FIG. 7, the content of the dimension tolerance data storage part 4 when the operator set the dimension tolerance data about the dimension which has five asymmetric dimension tolerances shown in FIG. 6 is shown. In addition to the elements of the dimension tolerance data table 51, the dimension tolerance data table 52 of FIG. 7 contains the information of the group name to which the dimension tolerance data belongs.

In the dimension tolerance data D21, the "shape element 1" is the ridge line 601A, and the "shape element 2" the ridge line 603A. Since the "adjustment mode" of the specified dimension tolerance data D21 of "80 mm" is "element 1 fixed", the shape data deformation processing unit 6 does not move the ridge line 601A.

In the dimension tolerance data D22, the "shape element 1" is the ridge line 602A, and the "shape element 2" the ridge line 603A. The dimension tolerance data D22 in which the reference dimension of 40 mm is specified shares the dimensional tolerance data D21 with the ridge line 603A, and the adjustment mode is "automatic". For this reason, the shape data deformation | transformation processing part 6 does not move ridgeline 603A.

In the dimension tolerance data D23, the "shape element 1" is the ridge line 604A, and the "shape element 2" the ridge line 605A. Since the "adjustment mode" is "fixed center" in the dimension tolerance data D23 having a reference dimension of 35 mm, the shape data deformation processing unit 6 has ridge lines 604A and 605A so that each figure element is symmetric with respect to the center line of the figure element. Move).

In the dimension tolerance data D24, the "shape element 1" is the ridge line 607A, and the "shape element 2" the ridge line 608A. Since the "adjustment mode" is "element 2 fixed", the shape data deformation processing part 6 does not let the ridgeline 608A move.

In the dimensional tolerance data (ridge lines 608A, 609A) having a reference dimension shown in FIG. 6, the "upper limit tolerance" is +0.03, and the "lower limit dimension tolerance" is -0.03, so that the shape data deformation processing unit 6 Do not move the ridges 608A and 609A.

Among the dimension tolerance data D21 to D24, the dimension tolerance data D21 and D22 share the ridge line 603A. Therefore, the dimension tolerance data D21 and D22 become the dimension tolerance data of the group G1, respectively. On the other hand, the dimension tolerance data D23 and D24 do not share different dimension tolerance data and figure elements. For this reason, the dimension tolerance data D23 and D24 become the dimension tolerance data of the group G2 and G3 different from the group G1, respectively.

8 is a flowchart showing the operation procedure of the NC programming support apparatus according to Embodiment 1 of the present invention. 8 shows an example of the operation procedure of the shape data deformation processing unit 6.

The shape data deformation processing unit 6 first classifies the dimension tolerance data in the dimension tolerance data table 51 stored in the dimension tolerance data storage unit 4 for each group sharing the figure element (step S1).

Next, the shape data deformation processing unit 6 uses the calculation result (machining target dimension) of the machining target size calculation unit 5 and the shape data stored in the shape data storage unit 2 to form each figure for each group classified. The amount of movement of the element is calculated. The shape data deformation processing unit 6 first checks whether there is an unprocessed group for which the movement amount of the figure element is not calculated (step S2). If there is an unprocessed group that does not calculate the movement amount of the figure element (step S2, YES), the shape data deformation processing unit 6 deforms the shape data by calculating the movement amount of the figure element for the unprocessed group (deformation calculation). (Step S3).

The shape data deformation processing unit 6 repeats the deformation processing for each group until the unprocessed group disappears (steps S2 to S3). If there is no unprocessed group for which the movement amount of the figure element has not been calculated (step S2, NO), the shape data deformation processing unit 6 ends the deformation process of the figure element.

Here, the processing (deformation processing of figure elements for each group) in step S3 will be described in detail. 9 is a flowchart showing the deformation processing procedure of figure elements for each group. In FIG. 9, the process sequence at the time of shape data deformation processing part 6 deforming a figure element with respect to one group is shown.

The shape data deformation processing unit 6 determines whether there is only one dimension tolerance data belonging to the group to be processed, and whether the "adjustment mode" of the dimension tolerance data is "automatic" (step S10).

When there is only one dimension tolerance data belonging to the group and "adjustment mode" = "automatic" of the dimension tolerance data (step S10, YES), the shape data deformation processing unit 6 causes the "adjustment mode" to "center fixed". In the same manner as in, the deformation process (default) of the figure element is performed, and the deformation process of the figure element is finished (step S20). Thereafter, the shape data deformation processing unit 6 repeats the processing of steps S2 and S3 shown in the flowchart of FIG. 8 if there is deformation processing of the next group of figure elements (return).

When there is a plurality of dimension tolerance data belonging to the group, or when the dimension tolerance data other than "adjustment mode" = "automatic" is included in the group (step S10, NO), the shape data deformation processing unit 6 It is determined whether the group contains a plurality of dimension tolerance data other than "adjustment mode" = "automatic" (step S30).

When a plurality of dimension tolerance data other than "Adjustment mode" = "Automatic" is included in the group to be processed (step S30, Yes), the shape data deformation processing unit 6 ends the error as the deformation processing of the figure element is impossible. . In addition, the shape data deformation processing unit 6 ends the error as the deformation processing of the figure element is impossible even when a plurality of dimension tolerance data of "adjustment mode" = "automatic" is included in the group to be processed.

If only one dimension tolerance data other than "Adjustment mode" = "Automatic" is included in the group to be processed (step S30, NO), the shape data deformation processing unit 6 until the unprocessed dimension tolerance data disappears. The processing of the respective dimension tolerance data is repeated (steps S40 to S140).

Specifically, the shape data deformation processing unit 6 first checks whether there is unprocessed dimensional tolerance data (step S40). When there is unprocessed dimensional tolerance data (step S40, YES), the shape data deformation processing unit 6 selects any one of unprocessed dimensional tolerance data (step S50).

The shape data deformation processing unit 6 then determines whether the "adjustment mode" of the selected dimensional tolerance data is "element 1 fixed" (step S60). When the "adjustment mode" of the dimension tolerance data is "element 1 fixed" (step S60, YES), the shape data deformation processing unit 6 fixes the "element 1" and moves the "element 2", The positions of "shape element 1" and "shape element 2" are determined (step S70).

If the "adjustment mode" of the dimensional tolerance data is not "element 1 fixed" (step S60, NO), the shape data deformation processing unit 6 determines whether the "adjustment mode" of the selected dimensional tolerance data is "element 2 fixed". It judges (step S80). When the "adjustment mode" of the dimensional tolerance data is "element 2 fixed" (step S80, YES), the shape data deformation processing unit 6 moves "shape element 1" while fixing "shape element 2". The positions of "shape element 1" and "shape element 2" are determined (step S90).

If the "adjustment mode" of the dimensional tolerance data is not "element 2 fixed" (step S80, NO), the shape data deformation processing unit 6 determines whether the "adjustment mode" of the selected dimensional tolerance data is "center fixed". (Step S100). When the "adjustment mode" of the dimensional tolerance data is "center fixed" (step S100, YES), the shape data deformation processing unit 6 fixes the center portions of the "shape element 1" and "shape element 2" and at the same time The element 1 "and the" shape element 2 "are moved equally (moving deformation), and the position of" shape element 1 "and the" shape element 2 "is determined (step S110).

If the "adjustment mode" of the dimension tolerance data is not "center fixed" (step S100, NO), the shape data deformation processing unit 6 selects either one of "shape element 1" and "shape element 2" of the selected dimension tolerance data. It is judged whether or not the position of has already been confirmed (step S120). When the position of either of the "shape element 1" and "shape element 2" has already been determined (step S120, Yes), the shape data deformation processing unit 6 has the "adjustment mode" as "automatic", The position of the shape element 1 and the shape element 2 is determined by moving the figure element (the other figure element) that is not positioned among the figure element 1 and the figure 2. S130). At this time, the figure element whose position has already been determined is fixed and is not moved.

If the position is not determined in both of the "shape element 1" and "shape element 2" (step S120, NO), the shape data deformation processing part 6 selects the next unprocessed dimension tolerance data (step S140). . In other words, if the position of any of the figure elements 1 and 2 is undetermined, the movement process is once held, and the other unprocessed dimensional tolerance data is processed first. And the shape data deformation | transformation processing part 6 performs the process according to the selected dimension tolerance data (next unprocessed dimension tolerance data) with the suspension of a movement process among steps S60-S140 about the selected dimension tolerance data.

After the positions of the "shape element 1" and "shape element 2" are determined (after the processing of steps S70, S90, S110, and S130), the shape data deformation processing unit 6 checks whether there is unprocessed dimensional tolerance data. (Step S40).

The shape data deformation processing unit 6 repeats the processing of steps S40 to S140 until the unprocessed dimensional tolerance data disappears. If the unprocessed dimensional tolerance data is lost (step S40, NO), the shape data deformation processing unit 6 ends the deformation processing of the figure element included in the group to be processed.

When the deformation processing of the shape data by the shape data deformation processing unit 6 is completed, the NC processing program generation processing unit 7 generates an NC processing program based on the shape and position of each figure element of the shape data after deformation and outputs the external output. do.

As a result, since the operator can easily predict the deformation result of the object to be processed that reflects the dimensional tolerance, it is possible to easily and efficiently create an appropriate NC machining program that reflects the intention (dimension tolerance) of the designer. In addition, since the dimension tolerance data need only be set at the point regarding the deformation of the shape, it is possible to easily create a desired NC machining program with little time and effort.

In addition, in step S20, when there is only one dimension tolerance data in the group ("adjustment mode" is "automatic"), deformation processing of the figure elements is performed in the same manner as in the case where the "adjustment mode" is "fixed center". Alternatively, the figure element may be deformed by another method. For example, deformation processing of figure elements may be performed similarly to the case where "adjustment mode" is "element 1 fixed" or "element 2 fixed".

In addition, the calculation method of the processing target dimension by the processing target dimension calculation part 5 is not limited to the calculation method using Formula (1). For example, the machining target dimension may be calculated using a value obtained by multiplying the upper limit tolerance and the lower limit tolerance by a predetermined ratio (for example, 3: 1, etc.). For example, when using the value obtained by multiplying the upper limit tolerance and the lower limit tolerance by n: m, the machining target dimension calculating unit 5 calculates the machining target dimension based on equation (2).

Machining target dimension = reference dimension + ((m × upper limit tolerance) + (n × lower limit tolerance)) / (n + m). (2)

In addition, in this embodiment, the deformation process of a figure element was demonstrated as an example using the case where shape data is two-dimensional, However, NC programming support apparatus 101 may perform the deformation process of a figure element with respect to three-dimensional shape data. Also in this case, the deformation processing of the figure element can be performed by the same configuration and the same processing procedure as when the shape data is two-dimensional.

The value (type) of the "adjustment mode" is not limited to four types of "element 1 fixed", "element 2 fixed", "center fixed", and "automatic". For example, it may be a data format for specifying the ratio of distributing the difference between the machining target dimension and the shape dimension to the figure elements on both sides. In this case, distributing the figure elements on both sides by, for example, 50%: 50% has the meaning equivalent to "center fixed".

The shape data of the object to be stored in the shape data storage section 2 is not limited to the shape data of the CAD data 20 but may be other data. In addition, among the dimension tolerance data, items other than the "adjustment mode" are not limited to the case of extracting from the CAD data 20, and an operator may supplement them as needed.

In addition, by assembling the NC programming support apparatus 101 according to the first embodiment into the numerical control apparatus of the machine tool, the NC machining program generated by the NC programming support apparatus 101 can be directly executed by the machine tool. do.

Thus, according to Embodiment 1, NC machining program of a to-be-processed object which has a site | part which differs from the dimension of a shape data (shape data in which asymmetrical fitting and dimension tolerance which the upper and lower dimension tolerances are biased to one side) is created is created. At this time, the desired output result (NC machining program) can be obtained only by setting the dimension tolerance data (adjustment mode, etc.) only for the figure elements related to the fitting and the dimension tolerance. As a result, the setting of the dimensional tolerance data can be omitted for the part not related to the movement deformation of the figure element, and it is possible to reduce the time and effort when creating the NC machining program. Therefore, it becomes possible to easily create an NC machining program that reflects the design intention shown in the dimension tolerance.

In addition, when a figure element is shared by a plurality of dimension tolerance data, the figure element is moved so that this shared figure element becomes a dimension corresponding to each machining target dimension of the dimension tolerance data sharing the figure element. Since the position is set, it is possible to easily create an NC machining program even when a figure element is shared by a plurality of dimensional tolerance data.

Embodiment 2 Fig.

Next, Embodiment 2 of this invention is described with reference to FIGS. 10-13. In Embodiment 2, the NC machining program of a to-be-processed object is created by integrating a some figure element as a figure element group, and moving the representative reference point of a figure element group.

Fig. 10 is a block diagram showing the structure of the NC programming support apparatus according to Embodiment 2 of the present invention. Among the components of FIG. 10, the same numerals are assigned to components that achieve the same functions as the NC programming support apparatus 101 of the first embodiment shown in FIG. 1, and overlapping descriptions are omitted.

The NC programming support device 102 performs functions of the NC programming support device 101 (CAD data input unit 1, shape data storage unit 2, interactive operation processing unit 3, dimensional tolerance data storage unit 4, processing In addition to the target dimension calculation unit 5, the shape data deformation processing unit 6, the NC processing program generation processing unit 7, the display unit 8, and the instruction input unit 9, a viscosity data storage unit 10 is provided. . The viscous data storage unit 10 is a storage means such as a memory for storing information on the figure element group of the shape data (viscosity data table 53 described later).

In addition to the setting processing of the dimension tolerance, the interactive operation processing unit 3 of the NC programming support device 102 integrates a plurality of figure elements of shape data designated by the operator as a figure element group. Then, a viscosity type is created at the position of the representative reference point of the integrated figure element group, and the viscosity type data is stored in the viscosity type data storage section 10 as the viscosity type data table by associating the viscosity type and the figure element group. When the dimensional tolerance is set and operated, the interactive operation processing unit 3 sets the dimensional tolerance as the viscosity degree setting target, in addition to the figure element representing the shape to be processed.

In addition, when the shape data deformation processing unit 6 of the NC programming support device 102 moves and deforms the figure element related to the dimensional tolerance data so as to satisfy the machining target dimension, the viscosity data is obtained when the object of the moving deformation is a viscosity type. The viscosity type data stored in the storage unit 10 is read out, and the group of figure elements related to the viscosity type data is shifted in conjunction with the movement of the viscosity type. In other words, in this embodiment, shape data consisting of a plurality is treated as point data representing one figure element group. In the figure element group treated as point data, the dimension tolerance of each figure element is set to the dimension tolerance data 0, and the figure elements are relatively moved as much as the movement of the point data.

Here, the structure of the viscosity data table stored in the viscosity data storage part 10 is demonstrated. It is a figure which shows an example of the structure of a viscosity data table. In FIG. 11, each row shows one viscosity type data.

The viscosity data table 53 includes information ("ID") identifying the viscosity data, "X coordinate", "Y coordinate", and a list of figure elements associated with the viscosity data ("shape element list"). Are the corresponding information tables.

A field of "ID" is a number which can uniquely identify each viscosity type, and numbers it so that it may not overlap with ID of the figure element which shows the process target shape. The field of the "X coordinate" and the "Y coordinate" field indicate the position (coordinate of the viscosity type) of the representative reference point of the figure element group related to the viscosity type. A field of the "shape element list" shows a list of IDs of the figure data (shape elements) in the figure element group related to the viscosity form.

Next, with reference to FIG. 12, 13, the operation procedure of the NC programming support apparatus which concerns on Embodiment 2 is demonstrated. It is a figure which shows an example of a process object shape, a viscosity type data, and a dimension tolerance data. In FIG. 12, the designer has shown the state which specified the dimension tolerance between the center of the groove shape of width 15mm which consists of ridge lines 701A, 702A, and 703A, and the ridge line 704A (s11).

The interactive operation processing unit 3 integrates a group of figure elements (ridge lines 701A, 702A, 703A) constituting the groove shape based on the instruction from the operator, and the viscosity type 801A having its center position as a representative reference point. ) (S12).

The interactive operation processing unit 3 stores the viscosity type data in which the viscosity type 801A is designated in the viscosity type data table 53 of the viscosity type data storage part 10. The viscosity data registered in the viscosity data table 53 includes the viscosity type 801A which is a representative reference point of the figure element group, the X coordinate and the Y coordinate of the viscosity type 801A, and the "shape element list" (ridge lines 701A and 702A). , ID of 703A), and the like (s13).

The interactive operation processing section 3 sets the dimension tolerance data (adjustment mode, etc.) between the center of the groove shape (viscosity type 801A) and the ridge line 704A, and the dimension tolerance of the dimension tolerance data storage section 4 The data table 52 is stored (s14). Dimensional tolerance data between the viscous mold 801A and the ridgeline 704A is set based on the X coordinate and the Y coordinate of the viscosity mold 801A, the shape data in the CAD data 20, instructions from the operator, and the like.

In the present embodiment, since the viscosity object is included in the set target shape (deformation process of the shape element) of the dimensional tolerance data, the shape data deformation processing part 6 deforms the viscosity type 801A as necessary when deforming the figure element. Move the position of.

FIG. 13 is a view for explaining a method of moving deformation of a group of figure elements related to a viscosity type when the viscosity type is moved. In FIG. 13, the movement process of ridgeline 701A, 702A, 703A when the viscosity type 801A shown in FIG. 12 is moved is shown.

As shown in FIG. 13, when the viscosity type 801A is moved to the position of the viscosity type 801B, the ridge lines 701A, 702A, and 703A associated with the viscosity type 801A are linked to this movement to form the viscosity type 801A. The movement is deformed by the same amount of movement as. At this time, the ridge lines 701A, 702A, and 703A are moved in the same direction as the moving direction from the viscosity mold 801A to the viscosity mold 801B.

As a result, the operator can easily predict the deformation result of the object to be processed reflecting the dimensional tolerance even for a part of the object to be processed (group of shaped elements) whose shape and size are invariable but whose position changes due to the influence of the dimensional tolerance. This makes it possible to easily and efficiently create an appropriate NC machining program that reflects the intention of the designer. In addition, as in the case of the first embodiment (NC programming support apparatus 101), since the dimension tolerance data need only be set for a part related to deformation, it is possible to create a desired NC machining program with little time and effort. do.

In addition, in this embodiment, the deformation process of a figure element was demonstrated using the case where shape data is two-dimensional as an example, The NC programming support apparatus 102 may perform the deformation process of a figure element with respect to three-dimensional shape data. . Also in this case, the deformation processing of the figure element can be performed by the same configuration and the same processing procedure as those of the shape data.

Moreover, by assembling the NC programming support device 102 inside the numerical control device of the machine tool, the NC machining program generated by the NC programming support device 102 can be directly executed by the machine tool.

Here, the configuration of the machine tool will be described. It is a figure which shows an example of the structure of a machine tool. The machine tool (machine tool) 201 has a numerical control device 150 and a processing part 205, and the processing part 205 is based on the control instruction from the numerical control device 150 to be processed. Process.

Numerical control device 150 includes an NC programming support device 102 and a control unit 110, the control unit 110 controls the processing unit 205 using the NC program created by the NC programming support device 102. do. As a result, the machine tool 201 can execute the NC machining program generated by the NC programming support device 102 to process the workpiece 210. The NC programming support device assembled to the numerical control device 150 is not limited to the NC programming support device 102 but may be the NC programming support device 101.

In this embodiment, the case where the viscosity mold 801A is moved based on the dimension tolerance data between the viscosity mold 801A and the ridgeline 704A has been described, but the dimension tolerance set between the viscosity mold and the viscosity mold The viscosity type may be moved based on the data. In addition, the position of figure data, such as a ridgeline, may be moved, not limited to moving the position of the viscosity type 801A. The position of the representative reference point of the figure element group may be any position, not limited to the center position of the figure element group. The reference position of the figure element group may be line segments or faces other than the viscosity type.

As described above, according to the second embodiment, the locally viewed shape and size are the same as the corresponding portions (figure element groups) of the original shape data. When creating an NC machining program for a workpiece to appear at different positions, the dimension tolerance data (adjustment mode) is set for the viscosity type representing the site without setting the dimension tolerance data for each figure element constituting the site. Only desired output result (NC machining program) can be obtained.

As a result, the NC machining program can be obtained only by setting a small number of dimensional tolerance data, and the time and effort in creating the NC machining program can be reduced. Therefore, it becomes possible to easily create an NC machining program that reflects the design intention shown in the dimension tolerance.

The NC processing program creation process described in the first and second embodiments described above may be performed by executing a program prepared in advance on a computer such as a personal computer.

As described above, the program preparation device, the numerical control device and the program creation method according to the present invention are suitable for the preparation of an NC machining program for numerically controlling a machine tool.

Claims (8)

In the program preparation device for creating an NC machining program reflecting the dimensional tolerance data in the shape data based on the shape data of the object to be processed and the dimensional tolerance data of the shape data, A machining target dimension calculation unit configured to calculate a machining target dimension of the workpiece based on the shape data and the dimension tolerance data; A shape for setting the movement position of the figure element such that the dimension between the figure element included in the shape data is a dimension corresponding to the machining target dimension based on the machining target dimension calculated by the machining target dimension calculation unit; A data transformation processing unit, And a machining program preparation unit for creating an NC machining program using the movement position of each figure element set by the shape data and the shape data deformation processing unit. The dimensional tolerance data is information used when moving each figure element so that the dimension between the figure elements becomes a dimension corresponding to the processing target dimension while reflecting the design intention. Contains adjustment mode information, The shape data deformation processing unit, And a moving position of the figure elements so as to reflect the design intention so that the dimension between the figure elements becomes a dimension corresponding to the machining target dimension, based on the adjustment mode. The method according to claim 1, The shape data deformation processing unit, When the figure element is shared by a plurality of dimensional tolerance data, the figure element is moved so that this figure figure is a dimension corresponding to each machining target dimension of the dimensional tolerance data sharing the figure element. Program setting apparatus, characterized in that for setting the position. The method according to claim 1, The figure element is a figure element group including a plurality of figure elements, And the shape data deformation processing unit sets a movement position of a predetermined coordinate corresponding to the figure element group. The method according to claim 1, One of the figure elements has at least two sub-elements, The adjusting mode includes a first mode of fixing one element of the at least two sub elements and moving another element, fixing the first element of the at least two sub elements and moving a second element, And a adjustment mode group having an automatic mode for fixing the second element and moving the first element. The method according to claim 1, One of the figure elements has at least two sub-elements, The dimension tolerance data has an ID of the figure element and each ID of the at least two sub elements, a dimension type, a reference dimension, at least two dimension tolerances, and the adjustment mode. The adjustment mode includes a first mode of fixing one element of the at least two sub-elements and moving another element, a second mode of moving from a center to which all of the sub-elements are fixed, and among the at least two sub-elements. And a third mode of fixing the first element, moving the second element, and fixing the second element and moving the first element. The method according to claim 1, And said machining target dimension is calculated separately for another adjustment mode. The numerical control apparatus provided with the program production apparatus as described in any one of Claims 1-6, and performs the process control of the said process object based on the said NC processing program. In the program creation method of creating an NC machining program reflecting the dimensional tolerance data in the shape data based on the shape data of the object to be processed and the dimensional tolerance data of the shape data, A machining target dimension calculating step of calculating a machining target dimension of the workpiece based on the shape data and the dimension tolerance data; A movement position setting step of setting a movement position of the figure element such that the dimension between the figure elements included in the shape data becomes a dimension corresponding to the machining target dimension based on the calculated machining target dimension and the shape data; A machining program creation step of creating an NC machining program using the shape data and the movement position of each figure element set; The dimensional tolerance data is information used when moving each figure element so that the dimension between the figure elements becomes a dimension corresponding to the processing target dimension while reflecting the design intention. Contains adjustment mode information, The moving position setting step, And a moving position of said figure element is set so that the dimension between said figure elements becomes a dimension corresponding to said processing target dimension while reflecting a design intention based on said adjustment mode.

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