JPH1185239A - Nc data generating method for boring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the time required for the interpretation of a drawing, the generation of a machining data table, the input of data, the debugging of a program, etc., by automatically processing boring data and generating numerical control(NC) machining data. SOLUTION: The center position of a bore at its root is decided as the position of the bore, a local coordinate system xyz including the bore position at z=0 is defined, and the bore shape on this coordinate system is generated as bore design data 1 in table form. The bore design data 1 is automatically processed to display the bore shape on a computer-aided design(CAD) drawing and the bore design data is further automatically processed to generate boring data. This boring data is automatically processed to generate NC machining data. Through the bore design data 1, the CAD drawing can, therefore, be associated with the computer-aided manufacturing(CAM) data; and then the hole shape is displayed on the CAD drawing with the bore design data 1 to check the data and the NC machining data can be generated directly and automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method for creating NC machining data from hole design data in CAD / CAM.

[0002]

2. Description of the Related Art In the production of molds and the like, CAD and CA are used.
M is widely used. Conventionally, a drawing is created using a computer, and NC data to be input to an NC lathe, an NC milling machine or the like is automatically created from the drawing information to perform NC processing. .

[0003]

However, such CAD
The / CAM system can be almost automatically automated for the processing of the external shape, such as die machining using an NC lathe or NC milling machine. However, in the case of hole machining, automation is mostly performed. Did not. In other words, although the hole shape can be represented in the drawing itself using CAD,
NC machining data cannot be created from the CAD data, and NC machining data has been created manually for hole machining even in CAD drawings.

For this reason, it is necessary to create a drilling program manually (manually) based on CAD drawings and know-how, which requires sufficient knowledge and experience in drilling and NC drilling, and furthermore, interpretation of drawings. It takes a long time to create a machining data table, input data, debug a program (check data), and the like, and has a high error rate.

The present invention has been made to solve such a problem. In other words, the object of the present invention is that it does not require much knowledge and experience on drilling and NC processing, and greatly reduces the time required for interpreting drawings, creating a processing data table, inputting data, and debugging a program (checking data). An object of the present invention is to provide a method of creating NC data for drilling, which can be shortened or eliminated, and can greatly reduce the rate of occurrence of errors.

[0006]

According to the present invention, according to the present invention, a local coordinate system xyz is defined in which the center position at the mouth of a hole is the position of the hole, and the hole position is z = 0. The hole shape is created as tabular hole design data, the hole design data is automatically processed, the hole shape is displayed on the CAD drawing, and the hole machining data is created, and the hole machining data is automatically processed to perform NC machining. There is provided an NC data creation method for drilling, which creates data.

According to the method of the present invention, once the hole design data is created, the hole machining data is created by automatically processing the hole design data, and then the NC machining data is automatically processed by the hole machining data. Can be created. Similarly, holes can be displayed on a CAD drawing by automatically processing the hole design data. Therefore, the CAD drawing and the CAM data can be linked via the hole design data. That is, the hole shape is CAD-converted from the hole design data.
The data can be checked and displayed on the drawing, and the NC processing data can be directly and automatically created from the hole design data.

Accordingly, as long as the hole design data can be created by the method of the present invention, no further knowledge and experience regarding drilling and NC processing are required. Also, CA
Since the display on the D drawing and the creation of NC machining data for CAM are performed by automatic processing, other than the work of creating hole design data, interpretation of drawings, creation of machining data tables, input of data, debugging of programs Eliminating the need for (data check) and the like can greatly reduce the work time. Further, since the data is unified into the hole design data, the occurrence rate of errors can be significantly reduced.

According to a preferred embodiment of the present invention, the hole design data comprises a data string including a hole position, a hole diameter, a hole depth, a tip angle, and a hole type in the local coordinate system xyz. By defining the hole shape with this data sequence, the hole shape can be easily expressed on the CAD drawing from this data sequence, and the hole processing data can be easily created from this data sequence by automatic processing. NC processing data can be created by automatically processing the processing data.

[0010]

Preferred embodiments of the present invention will be described below with reference to the drawings. In each of the drawings, common parts are denoted by the same reference numerals, and redundant description will be omitted.
FIG. 1 shows CAD / Drilling in drilling using the method of the present invention.
It is a flowchart of CAM. In this figure, the method of the present invention includes a first step 11 for creating a hole shape as tabular hole design data 1 and a CA process for automatically processing the hole design data.
A second step 12 for displaying the hole shape on the D drawing, a third step 13 for automatically processing the hole design data to create the hole processing data, and an NC for automatically processing the hole processing data.
And a fourth step 14 for creating processing data. The other steps in this figure are CAD or C
This is a conventional step in AM.

The first step 11 comprises a hole design data creation 11a, a design rule 11b for backing up the hole design data, and a support system 11c. The design rule 11b determines that the center position of the hole at the mouth is the position of the hole, and the position of the hole is z =
A local coordinate system xyz to be set to 0 is defined (described in detail in FIG. 2), and a hole shape in this coordinate system is created as hole design data in a table format in step 11a. The design rule 11b indicates such a design standard, and does not necessarily need to be programmed, and may be in the form of a manual. The support system 11c is for facilitating manual work of creating hole design data based on the design rule 11b.

FIG. 2 is an explanatory diagram of a coordinate system applied to the method of the present invention. As shown in FIG.
Is defined as a hole position, and a local coordinate system xyz where the hole position 3 is z = 0 is defined. That is, in FIG. 2, the basic coordinate system x ⁽¹⁾ -y ⁽¹⁾ -z ⁽¹⁾
By determining the angles θ, φ, α and the offset amounts a, b, c, the local coordinate system xyz (x ⁽⁵⁾ −y ⁽⁵⁾ −z in the figure) to which the hole position 3 (hole opening) belongs. ⁽⁵⁾ ) can be defined. Therefore, this local coordinate system xy
The coordinates of the hole position 3 in z (x = 36, y = 8 in the figure)
If 1) is determined, the coordinate system to which the hole belongs and its position can be defined. In the example of FIG. 2, the z-axis in the local coordinate system xyz is positive in the direction from the tip of the hole toward the mouth, but the present invention is not limited to this, and the reverse direction may be positive.

FIG. 3 shows an application example of the present method in the case of a basic hole shape. In this drawing, the hole design data 1 represents the hole shape in a table format. The hole design data 1 is composed of a data string including a hole position, a hole diameter, a hole depth, a tip angle, and a hole type in the local coordinate system xyz. That is, the coordinate system used in this table is the local coordinate system, and the directional angle, tilt angle, rotation angle, x shift dimension, y shift dimension, and z shift dimension in the local coordinate system are as follows:
Angles θ, φ, α and offset amounts a, b, c in FIG.
And the number of the coordinate system is the basic coordinate system x ⁽¹⁾ −y ⁽¹⁾
−z is the number of the local coordinate system xyz for ⁽¹⁾ .
These data may use another coordinate system as long as the center position 3 at the mouth of the hole 2 is the position of the hole, and the local coordinate system xyz where the hole position 3 is z = 0 is defined. .

In this table, the hole position is the coordinate of the hole position 3 in the local coordinate system xyz (in the example of FIG. 2,
x = 36, y = 81), and z is basically 0 from the definition. Further, the hole diameter, the hole depth, and the tip angle are design dimensions of each hole, and preferably, an upper limit and a lower limit are input. The types of holes include drills, spot facings, hole facings, counterbores, tapers, taps, and the like.

By creating these data as the hole design data 1, various basic hole shapes shown in the lower part of FIG. 3 can be displayed.

FIG. 4 shows an application example of the present method in the case of a complicated hole shape. By combining a plurality of data strings shown in FIG. 3, a complicated hole shape as shown in this figure can be represented as the hole design data 1. In this table, for example, the data of the hole F2 is represented by four data strings 1A to 1E. The data in the blank portion in 1A to 1E is applied as common data without display / entry.

Returning to FIG. 1, the second step 12 is a step of automatically processing the hole design data 1 and displaying the hole shape on the CAD drawing. As is clear from FIGS. 2 and 3, displaying the hole shape on the CAD drawing from the hole design data 1 by defining it in a table format can be easily and automatically processed from the conventional technology, and the result is displayed on the CAD drawing. By comparing with the hole, the hole design data 1 can be easily and reliably visually checked by, for example, color coding.

FIG. 5 is a diagram showing an example of creating NC processing data from the hole data of FIG. In this figure, the upper table is the hole design data 1 for one hole, and the lower table is the NC processing data obtained by automatically processing this. The NC machining data has machining order, machining details, and Z position data in addition to the coordinate system and hole position data similar to the hole design data 1. The NC data can be automatically created by a program in which machining know-how is added to the hole design data 1. Note that some data such as the processing content and the cutter reference position may be manually input.

Returning again to FIG. 1, the third step 13 in FIG.
Is a step of automatically processing the hole design data 1 shown in FIG. 5 to create hole machining data. Further, a fourth step 14 is a step of automatically processing the drilling data to create NC data. This processing can also be automatically performed by using a conventional APT source creation system or the like.

According to the above-described method of the present invention, the hole design data 1 shown in FIG. 1 is once created, and then the hole design data 1 is automatically processed from this data to create hole machining data (third step 13). NC by automatically processing hole machining data
Processing data can be created (fourth step 14). Similarly, the hole design data 1 is automatically processed and CAD
Holes can be displayed on the drawing (second step 1)
2).

Accordingly, CA data is transmitted through the hole design data 1.
The D drawing and the CAM data can be linked, the hole shape can be displayed on the CAD drawing from the hole design data 1 and the data can be checked.
C processing data can be directly and automatically created.

Therefore, as long as the design data 1 of the hole can be created by the method of the present invention, further hole machining and NC
The display on the CAD drawing and the creation of NC machining data for CAM are performed automatically without the need for knowledge and experience on machining, so the interpretation of the drawing and machining data other than the work of creating hole design data are performed. Create tables, enter data,
Eliminating the need for program debugging (data checking), etc., greatly reduces the work time, and since the data is unified into hole design data,
The occurrence rate of errors can be greatly reduced.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.

[0024]

As described above, the NC according to the present invention for drilling holes is used.
The data creation method does not require much knowledge and experience in drilling and NC machining, and greatly reduces the time required for interpreting drawings, creating machining data tables, inputting data, debugging programs (checking data), etc. It has an excellent effect that it can be eliminated and the occurrence rate of mistakes can be greatly reduced.

[Brief description of the drawings]

FIG. 1 shows CAD / Drilling in drilling using the method of the present invention.
It is a flowchart of CAM.

FIG. 2 is an explanatory diagram of a coordinate system applied to the method of the present invention.

FIG. 3 is an application example (display rule) of the method in the case of a basic hole shape.

FIG. 4 is an application example of the present method in a case of a complicated hole shape.

FIG. 5 is a diagram illustrating an example of creating NC data from the hole data of FIG. 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 hole processing data 2 hole 3 lip center (hole position) 11 first step 11a creation of hole design data 11b design rule 11c support system 12 second step 13 third step 14 fourth step

Claims (2)

[Claims] 1. A center position at the mouth of a hole is defined as a position of the hole,
A local coordinate system xyz where the hole position is z = 0 is defined, the hole shape in the coordinate system is created as tabular hole design data, the hole design data is automatically processed, and the hole shape is plotted on a CAD drawing. A method for creating NC data for drilling, comprising displaying and creating drilling data, and automatically processing the drilling data to create NC drilling data. 2. The hole design data according to claim 1, wherein the hole design data includes a data string including a hole position, a hole diameter, a hole depth, a tip angle, and a hole type in the local coordinate system xyz. The NC data creation method for the hole drilling described.