JP2001134312A - Method for preparing sheet metal working cad data, method for preparing sheet metal working cam data and computer readable recording medium recording sheet metal working data preparation program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To share process data concerned with a forming part by a sheet metal working CAD system and a sheet metal working CAM system and to hand over the process data of the forming part from the CAD system to the CAM system. SOLUTION: Process data for a forming part consisting of plural processes are previously registered in a process database 53 together with forming process identification(ID) information. A sheet metal working CAD data preparation program 21 prepares sheet metal working CAD data 54 provided with the forming process ID information by adding the forming process ID information to be the ID information of the forming part extracted from sheet metal working CAD data 52. A sheet metal working CAM data preparation program 31 extracts forming process ID information from the inputted data 54, reads out process data from the process database 53 on the basis of the forming ID information and prepares CAM data on the basis of the process data, the sheet metal working CAD data 54, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a link between computer aided design (CAD) and computer assisted production (CAM), and more particularly to a method for creating sheet metal CAD data, a method for creating sheet metal CAM data, and a method for creating sheet metal data for handling sheet metal products. The present invention relates to a computer-readable recording medium on which a program is recorded.

[0002]

2. Description of the Related Art In general, a sheet metal product includes a forming part including a plurality of steps such as burring. It takes considerable skill to read a plurality of steps necessary for the forming from a design drawing.

[0003] For example, to make a screw hole in a thin plate, first drill a pilot hole in a burring, then burring,
Finally, three steps of turning off the tap are required. The presence or absence of a pilot hole, the pilot hole size, the type of die used, and the like differ depending on the type of material and the thickness of the plate.

[0004] Dish fir processing, doweling, half-shear processing, etc., read and judge a drawing based on the notation of the drawing.

Further, in recent years, two-dimensional CA has been
D and three-dimensional CAD are widely used. In particular, three-dimensional CAD
In the field of sheet metal design, the use of three-dimensional CAD for product design is increasing.
The case of ordering sheet metal products using the three-dimensional CAD data is increasing, since the labor of redrawing the three-dimensional CAD data into a three-sided view is omitted.

[0006]

However, conventional sheet metal CAD data includes design information, but does not include information necessary for the above-described forming process. That is,
Since the design by CAD and the creation of NC data by CAM were performed separately, the completed sheet metal CA
Even if the D data is converted into, for example, DXF and input to an automatic programming device which is a CAM system, there is a problem that a skilled worker needs to manually input information necessary for processing while referring to a sheet metal CAD model display. there were.

[0007] Further, since the work of CAD for designing a sheet metal product and the CAM for creating the machining data are not consistent, the intention of the design engineer is not correctly transmitted to the machining engineer, and there is a possibility that an error may occur when creating the machining data. There was a problem.

In view of the above problems, it is an object of the present invention to share process data relating to a forming part between a sheet metal CAD system and a sheet metal CAM system, and to process the forming part from the sheet metal CAD system to the sheet metal CAM system. It is an object of the present invention to provide a sheet metal CAM data creating method, a sheet metal CAD data creating method, and a computer readable recording medium recording a sheet metal data creating program capable of inheriting data.

Another object of the present invention is to provide a sheet metal CAM data creating method, a sheet metal CAD data creating method, and a sheet metal data creating method in which a sheet metal CAD system and a sheet metal CAM system can cooperate to quickly create accurate NC machining data. An object of the present invention is to provide a computer-readable recording medium on which a program is recorded.

[0010]

According to a first aspect of the present invention, there is provided a method for inputting sheet metal CAD data, and a step of extracting a forming part requiring a plurality of steps from the input sheet metal CAD data. And a step of adding identification information of process data relating to the processing step of the extracted forming portion to the sheet metal CAD data.

In order to achieve the above object, the invention according to claim 2 is a step of inputting sheet metal CAD data to which identification information of process data relating to a processing step of a forming part is added, and from the input sheet metal CAD data, A step of extracting identification information; a step of reading process data relating to a processing step from a process database based on the identification information; and a step of creating sheet metal CAM data based on the read step data and the sheet metal CAD data. This is a method for creating sheet metal CAM data having the following points.

According to a third aspect of the present invention, there is provided a method for inputting sheet metal CAD data and inputting the input sheet metal CA.
Extract molding process parts that require multiple steps from D data,
The present invention is a computer-readable recording medium on which a sheet metal CAD data creation program is recorded, in which identification information of process data relating to a processing step of the extracted forming part is added to the sheet metal CAD data.

According to a fourth aspect of the present invention, in order to achieve the above object, sheet metal CAD data to which identification information of process data relating to a processing step of a forming part is added is input, and the identification information is obtained from the input sheet metal CAD data. Sheet metal CAM data, wherein process data relating to a machining process is read from a process database based on the identification information, and sheet metal CAM data is created based on the read process data and the sheet metal CAD data. This is a computer-readable recording medium on which a creation program is recorded.

[0014]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2 shows an example of the configuration of a computer system used to execute the sheet metal CAD data creation method and the sheet metal CAM data creation method according to the present invention.

In FIG. 2, the computer system includes:
A CPU 1 as an arithmetic and control unit, a main memory 2 for storing a three-dimensional CAD program, a sheet metal CAD data creation program, a sheet metal CAM data creation program, a sheet metal model data to be processed, and the like, and data via a storage medium. For exchange of programs and programs
D3 and CD-ROM drive 4 and bus arbitration circuit 5
, A bus 6, a hard disk (HD) 7 as an auxiliary storage device, and a CRT display 8 as a display device
And a keyboard 9 and a mouse 10 as input devices;
A communication control device 12 for connecting to the LAN 11 is provided. The computer system may use a conventional general-purpose workstation or personal computer.

FIG. 1 shows a sheet metal CAD data creating method and a sheet metal C for implementing the sheet metal CAM data creating method according to the present invention.
It is a schematic flowchart which shows the processing content of an AD data creation program and a sheet metal CAM data creation program.

The sheet metal CAD data creation program and the sheet metal CAM data creation program according to the present invention include, for example,
The computer system shown in FIG.
It is provided stored in a storage medium such as a ROM, and can be read by the FDD 3 or the CD-ROM drive 4.

Further, the sheet metal CAD data creation program and the sheet metal CAM data creation program of this embodiment can refer to, for example, a molding process database 53 stored on the HD 7 and accessible to both programs. It has become.

In FIG. 1, a sheet metal CAD data creation program 21 includes a design model drawing input processing section 22 and a sheet metal CAD data input processing section 23 which are steps for inputting sheet metal CAD data, and an externally input or drawn HD.
(Symbol 7 in FIG. 2) sheet metal CAD data 52 stored
And a molding process extraction unit 24 for extracting a molding process portion requiring a plurality of processes, and identification information of process data relating to the processing process of the extracted molding process portion is added to the sheet metal CAD data 52 to perform the molding process. It is provided with a molding process identification information addition processing section 25 which is a process of outputting the sheet metal CAD data 54 with process identification information.

A sheet metal CAM data creation program 3
Reference numeral 1 denotes a sheet metal CAD data input processing unit 32 for inputting sheet metal CAD data to which identification information of process data relating to a processing step of a forming part is added, and the identification information is extracted from the input sheet metal CAD data. A molding process identification information extraction processing unit 33 as a process, a process database read processing unit 34 as a process of reading process data relating to a processing process from a process database based on the identification information, a read process data and sheet metal CAD A CAM data creation processing unit 35 for creating sheet metal CAM data 57 based on the data 55;

It is assumed that the process database 53 is registered in advance by adding molding process identification information to process data including a machining procedure of a molding process including a plurality of machining processes.

Here, a burring process in which a tap is cut will be described as an example of a forming process including a plurality of processes. First, as a first step, a pilot hole having a hole diameter corresponding to the screw hole diameter is formed. Next, as a second step, burring is performed by selecting a punch hole diameter according to the plate thickness. Finally, as a third step, the tap is cut to complete the screw hole.

As information for identifying the forming process of the burring process in which the tap is cut, for example, a screw diameter (M)
And the plate thickness (t) can be used. Furthermore, when handling a plurality of materials, as molding process identification information,
Although the type of the material can be added, it is omitted in the description of the present embodiment.

For example, when a 5 mm screw is cut into a 1.2 mm thick plate, for example, [M5, t = 1.2] is given as the molding process identification information. First process information, second process information, and third process information are stored in a process database as process data corresponding to the molding process process identification information.

The first process information indicates a process of drilling a pilot hole of φA = 2.4, and the second process information indicates a burring process of inner diameter φC = 4.3 using a die having a hole diameter φB = 5.9. Is performed, and the third process information indicates a tap cutting process of M5.

Next, the operation of the sheet metal CAD data creation program 21 described in the left half of FIG. 1 will be described.

First, the design model drawing input processing unit 22 draws and inputs a design model of a product or part manufactured by sheet metal using the mouse 10 or the keyboard 9. This includes well-known two-dimensional CAD or three-dimensional CA
With reference to the display graphic pattern data 51, the sheet metal CAD data 5 is displayed while displaying a projection view or a three-dimensional view of the design model on the CRT display 8 as a display device.
2 is generated.

In the design model drawing input processing unit 22,
In addition to inputting new drawing, already designed sheet metal C
AD data can also be input from the sheet metal CAD data input processing unit 23.

Next, the inputted sheet metal CAD data 52
Then, the forming part of the design model is extracted by the forming part extraction processing unit 24 from. At this time, the molding process identification information of the extracted molding portion is obtained by referring to the process database.

[0030] These molded parts include, for example, burring, threaded burring, curling for bending the tip of the burring outward, and fir-cone processing for coining after drilling. Further, guide rail drawing used for a guide rail of a computer substrate or the like is also included in these formed portions. The guide rail drawing process is a process of bending and drawing a portion sandwiched between two parallel prepared holes into a U-shaped cross-sectional shape after forming a rectangular hole or a round prepared hole.

Next, the sheet metal CAD data 52 with the sheet metal processing data added to the sheet metal CAD data 52 is created by the sheet metal CAD data 52 by the sheet metal processing data addition processing section 25, and the sheet metal CAD data creation program 2
1 is terminated. The sheet metal CAD data 54 with the forming process identification information serves as input data of the sheet metal CAM data creation program 31 described below.

Next, the operation of the sheet metal CAM data creation program 31 described in the right half of FIG. 1 will be described.

First, the sheet metal CAD data 54 with molding process identification information is input by the sheet metal CAD data input processing section 32. Then, the sheet metal CAD with the molding process identification information
The molding process identification information is extracted from the data 54 by the molding process identification information extraction processing unit 33, and the sheet metal CAD data 55 is output. Sheet metal CAD data 55
May be the same content as the sheet metal CAD data 54 with molding process identification information, or may be CAD data in which the molding process identification information is deleted from the sheet metal CAD data 54 with molding process identification information.

The molding process identification information extracted by the molding process identification information extraction processing unit 33 is passed to the process database read processing unit 34, and the process database read processing unit 34 processes the process database 53 based on the molding process identification information. And reads out the process data corresponding to the molding process identification information.

The process data is information on a plurality of processes constituting the forming process. For example, in the case of thread cutting, the presence / absence of pilot hole processing, pilot hole diameter φA, The type or dimensions φB and φC of the burring mold are stored as the two process information, and the tapping is stored as the third process information.

Next, the CAM data creation processing unit 35 creates CAM data, which is NC data of the sheet metal machine tool, by using the read process data, sheet metal CAD data 55, mold data 56, and the like. The processing of the CAM data creation program ends.

As described above, according to the present invention, the step of inputting sheet metal CAD data and the step of inputting sheet metal CA
A step of extracting a forming part requiring a plurality of steps from the D data, and a step of adding identification information of process data relating to the processing step of the extracted forming part to the sheet metal CAD data, Based on the CAD data passed to the CAM system, the process data of the molded part can be read from the process database, so that the sheet metal CAD system and the sheet metal CAM system share the process data of the molded part, and the sheet metal CAD.
There is an effect that the process data of the forming part can be transferred from the system to the sheet metal CAM system.

Further, according to the present invention, the sheet metal C to which the identification information of the process data relating to the working process of the forming portion is added.
A step of inputting AD data; a step of extracting the identification information from the input sheet metal CAD data; a step of reading process data on a processing step from a process database based on the identification information; and a step of reading the read process data. And a step of creating sheet metal CAM data based on the sheet metal CAD data, whereby the sheet metal CAD system and the sheet metal CAM system share process data relating to a forming part, and the sheet metal CAD system transmits the sheet metal CA to the sheet metal CAD system.
Since the process data of the forming part can be handed over to the M system, there is an effect that the sheet metal CAD system and the sheet metal CAM system can cooperate to quickly create accurate NC processing data.

[Brief description of the drawings]

FIG. 1 is a schematic flowchart showing processing contents of a sheet metal CAD data creation program and a sheet metal CAM data creation program for implementing the sheet metal CAD data creation method and the sheet metal CAM data creation method according to the present invention.

FIG. 2 is a system configuration diagram showing a configuration example of a computer system used for carrying out a sheet metal CAD data creation method and a sheet metal CAM data creation method according to the present invention.

FIG. 3 is an explanatory view of a process of burring.

[Explanation of symbols]

 Reference Signs List 21 sheet metal CAD data creation program 22 design model drawing input processing unit 23 sheet metal CAD data input processing unit 24 molding processing part extraction processing unit 25 molding processing process identification information addition processing unit 31 sheet metal CAM data creation program 32 sheet metal CAD data input processing unit 33 Forming process identification information extraction processing unit 34 Process database read control unit 35 CAM data creation processing unit 53 Process database 54 Sheet metal CAD data with molding process identification information 56 Mold data 57 CAM data

Claims (4)

[Claims] 1. A step of inputting sheet metal CAD data, a step of extracting a forming part requiring a plurality of steps from the input sheet metal CAD data, and identification information of step data relating to a processing step of the extracted forming part. Adding to the CAD data of the sheet metal CAD data. 2. A step of inputting sheet metal CAD data to which identification information of process data relating to a processing step of a forming portion is added; a step of extracting the identification information from the input sheet metal CAD data; Sheet metal CAM data comprising: a step of reading process data relating to a processing step from a process database based on the process data; and a step of creating sheet metal CAM data based on the read step data and the sheet metal CAD data. How to make. 3. A sheet metal CAD data is inputted, a forming part requiring a plurality of steps is extracted from the inputted sheet metal CAD data, and identification information of process data relating to a processing step of the extracted forming part is inputted to the sheet metal CAD. A computer-readable recording medium on which a sheet metal CAD data creating program is added to data. 4. A sheet metal CAD data to which identification information of process data related to a processing step of a forming part is added, the identification information is separated from the input sheet metal CAD data, and a processing step is performed based on the identification information. A computer-readable recording medium recording a sheet metal CAM data creation program, wherein sheet metal CAM data is created based on the read step data and the sheet metal CAD data.