JPH1027269A - Modeling method of 3D CAD system - Google Patents

Abstract

(57) [Summary] [Problem] To dramatically increase modeling efficiency and reliably prevent modeling errors. Kind Code: A1 A processing data relating to a plurality of different mounting parts and a processing part to be mounted in a mounting part corresponding to each of the mounting parts is constructed as a database in advance. After modeling the part 2 to be mounted, the mounting part 3 to be mounted on the part 2 to be mounted
Is selected, and the mounting condition of the selected mounting part 3 is input, whereby the mounting processing of the mounted part 2 modeled based on the processing data of the database D corresponding to the selected mounting part 3 and the mounting condition described above. Based on the calculation processing for obtaining the processing data corresponding to the part 4 and the processing data thus obtained, a modeling processing for adding the mounting target processing part 4 to the mounting target component 2 is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for modeling a three-dimensional CAD system, which is particularly suitable for use in creating a part drawing.

[0002]

2. Description of the Related Art Generally, three-dimensional CAD (Compute)
Raided design (computer aided design) systems are known. By the way, in a three-dimensional CAD system, from the viewpoint of modeling efficiency, after creating an assembly drawing in which an attachment component is attached to a component to be attached, a component diagram is often created based on the assembly diagram.

Conventionally, when a part drawing is created from an assembly drawing by a three-dimensional CAD system, a method of mainly performing a set operation on a solid model has been used. This method uses an assembly function provided as a standard function in a three-dimensional CAD system. An assembly drawing can be created by performing an operation (sum operation) for adding parts of a solid model, and a specific drawing can be created from the assembly drawing. A component drawing can be created by executing an operation for subtracting a component (calculation of difference: cutout).
For example, a block (attached part) having three block members 50a, 50b, and 50c shown in FIG.
By executing a calculation for adding a bolt (attachment part) 51 to 50, the assembly diagram shown in FIG.
If the bolt 51 is cut out from 0, a part drawing of the block 50 from which the bolt 51 has been removed can be obtained.

[0004]

However, three-dimensional CAD
The conventional modeling method using the assembly function in the system has the following problems.

First, since the drawing is based on a simple calculation of the sum and difference of the mounting part and the mounting part, the drawing obtained is a drawing in which the mounting processing part such as a hole, a concave portion or a female screw part does not exist in the mounting part. Becomes Therefore, the attached processing part must be separately modeled, and efficient modeling cannot be performed.

[0006] Second, since the mounting portion requires a separate modeling operation, modeling errors such as misalignment are likely to occur.

[0007] The present invention has been made to solve the problems existing in the prior art, and a modeling method of a three-dimensional CAD system capable of dramatically increasing the modeling efficiency and reliably preventing a modeling error. The purpose is to provide.

[0008]

A three-dimensional CAD system modeling method according to the present invention uses a different three-dimensional CAD system 1 when modeling a part to be mounted 2 on which a mounting part 3 is to be mounted. A plurality of attachment parts 3 and attached parts 2 corresponding to each attachment part 3.
The processing data relating to the mounted processing part 4 including one or more of the concave part, the hole part, the internal thread part, etc. is constructed as a database D, and at the time of modeling, the mounted part 2 is modeled. By selecting the mounting part 3 to be mounted on the mounting part 2 and inputting the mounting conditions of the selected mounting part 3, modeling is performed based on the processing data of the database D corresponding to the selected mounting part 3 and the mounting conditions. It is characterized in that an arithmetic processing for obtaining processing data corresponding to the mounted processing part 4 of the mounted part 2 and a modeling processing for adding the mounted processing part 4 to the mounted part 2 are executed by the obtained processing data. I do.

Thus, at the time of modeling, on the basis of the processing data corresponding to the selected mounting part 3 and the mounting conditions of the mounting part 3, the parts such as the concave part, the hole part, the female screw part, etc. in the part to be mounted 2 are formed. The mounting processing part 4 is obtained by the arithmetic processing, and the obtained mounting processing part 4 is added to the mounted part 2 by the modeling processing. Therefore, by simply selecting the attachment part 3 and designating the attachment conditions, a part diagram relating to the attachment part 2 can be obtained, and furthermore, by executing the operation of adding the attachment part 3 to the attachment part 2, both of them can be obtained. Is obtained.

[0010]

Next, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

First, the configuration of a three-dimensional CAD system 1 that can execute the modeling method according to the present embodiment will be described with reference to FIG.
This will be described with reference to FIG.

Referring to FIG. 1, a three-dimensional CAD system 1 includes a computer main body 5 for performing various operations and controls. The computer main body 5 includes a memory 6 for storing various data such as drawing data and a database D. I do. In addition, an input unit 7 such as a keyboard, a touch pen, and a mouse is connected to the computer main body 5, and a graphic display 8 for displaying a drawing and an XY plotter (printer) 9 for printing out the drawing are connected.

Next, the modeling method according to this embodiment will be described in detail with reference to the flowchart shown in FIG. 1 and FIGS.

FIG. 3 shows, as an example of the part 2 to be mounted, three block members 11, 1 formed in a rectangular shape and having different thicknesses.
4 shows a block 10 in which the blocks 2 and 13 are stacked, and FIG. 4 shows, as an example of the mounting part 3, a bolt 20 which is integrated with the block 10 by being mounted on the block 10.

First, a plurality of different bolts 20.
The processing data relating to the mounting processing part 4 in the mounting part 2 corresponding to the (mounting parts 3) and the bolts 20... Is constructed as a database D (step S0). In this case, different means that the standard (size, length, shape, etc.), the maker, etc. are different. Further, as the processing data of the mounted processing portion 4 in the mounted component 2, for example,
In addition to the size, length, shape, etc. of the female screw portion to which the bolts 20 are screwed, the diameter of the hole to be inserted, the diameter and depth of the concave portion for accommodating the head 20a, and the like are meant. Then, the constructed database D is stored in the memory 6 attached to the three-dimensional CAD system 1.

On the other hand, at the time of modeling, first, the component 2 to be mounted is modeled. That is, using the standard function of the three-dimensional CAD system 1, the block 10 in which the three block members 11, 12, and 13 shown in FIG. 3 are overlapped is modeled (step S1). When the modeling of the block 10 is completed, a bolt 20 to be attached to the block 10 is selected (step S2). In this case, a plurality of different bolts 20 registered as the database D
Is displayed on the graphic display 8, and a desired bolt 20 can be selected from the list. FIG. 4 shows the bolt 20 thus selected.
Means

Next, the user inputs the mounting condition of the selected bolt 20 (step S3). That is, the mounting position (coordinates) and mounting direction of the bolt 20 with respect to the block 10,
Recesses, holes on the part 2 to be mounted
The processing conditions of the mounted processing portion 4 such as a female thread portion are input (designated) from the input portion 7. In the embodiment, the center of the block 10 is designated as the attachment position, and the block member 1 is designated as the attachment direction.
The direction perpendicular to the surface is designated from the first side, and as the processing conditions relating to the workpiece 4 to be attached, the hole and the head 2 through which the shaft 20b of the bolt 20 is inserted into the block member 11 are inserted.
0a, a hole through which the shaft portion 20b of the bolt 20 is inserted into the block member 12, and a female screw into which the screw portion 20bn of the bolt 20 is screwed into the block member 13. Specify the point where each part is provided.

Thus, based on the processing data in the database D corresponding to the selected bolt 20 and the specified mounting condition, the three-dimensional CAD system 1 is controlled by the computer main body 5 by the mounted processing portion of each of the block members 11, 12, and 13. Processing data corresponding to No. 4 is obtained by an arithmetic processing (step S4). In this case, for example, in the case of the block member 12, only the diameter of the hole is set as the processing data on the database D, but the processing condition of providing the hole in the block member 12 is input. Means that the length and position of the hole are calculated. FIG. 5 shows the to-be-processed portion 4 obtained by the arithmetic processing. That is, as shown in FIG. 6 and FIG. 6, the diameter and depth of the concave portion 31 accommodating the head portion 20 a of the bolt 20 and the diameter of the hole portion 32 through which the shaft portion 20 b of the bolt 20 is inserted with respect to the block member 11. And the length of the block member 1
2, the diameter and length of the hole 33 through which the shaft portion 20b of the bolt 20 is inserted, and the block member 13 of the female screw portion 34 into which the screw portion 20bn of the bolt 20 is screwed. Standards and depths are required respectively.

Then, the three-dimensional CAD system 1 adds the obtained concave portion 31, hole portion 32, hole portion 33 and female screw portion 34 to the modeled block members 11, 12, and 13 (block 10). The computer 5 executes a modeling process to be performed (step S5). FIG. 6 shows a component diagram Ps in a two-dimensional display modeled in this way, and FIG. 7 shows a component diagram Pt in a three-dimensional display.

On the other hand, since the bolts 20 serving as the attachment parts 3 are registered in the database D, if the arithmetic processing for adding the bolts 20 to the obtained parts drawings Ps and Pt is executed, the bolts 20 are attached to the block 10. The obtained assembly drawing can be obtained (step S6). FIG. 8 shows an assembly drawing At obtained by three-dimensional display thus obtained, and FIG. 9 shows an assembly drawing As obtained by two-dimensional display.

Therefore, according to the modeling method of the present embodiment, accurate parts drawings and assembly drawings can be automatically created only by selecting attachment parts and designating attachment conditions. And modeling errors can be reliably prevented. Therefore,
For example, it is optimally used for modeling a molding die in an injection molding machine in which the types of parts to be used are limited and manufactured based on a certain standard. In general, a molding die uses a plate member as a component to be mounted, and a bolt, an ejector pin, or the like as a mounting component.

The embodiment has been described in detail above.
The present invention is not limited to such an embodiment.
For example, although the attached parts are illustrated as blocks, the present invention can be applied to any other attached parts such as plate members and combinations thereof, and the attached parts are illustrated as bolts, but other arbitrary attached parts such as pin members are used. Applicable to parts and combinations thereof. In addition, it is possible to arbitrarily change the detailed configuration, method, and the like without departing from the gist of the present invention.

[0023]

As described above, the three-dimensional CAD according to the present invention is
In the modeling method of the system, processing data relating to a plurality of different mounting parts and a processing part to be mounted in a mounting part corresponding to each mounting part is constructed as a database, and at the time of modeling, the mounting part is modeled. After that, select the mounting part to be mounted on the mounted part,
In addition, by inputting the mounting conditions of the selected mounting component, an operation for obtaining the processing data corresponding to the mounting processing portion of the modeled mounting target component based on the processing data of the database corresponding to the selected mounting component and the mounting conditions. Due to the processing and the processing data obtained, a modeling process for adding the mounted processing part to the mounted part was executed,
Only by selecting the mounting parts and specifying the mounting conditions, it is possible to obtain accurate parts drawings and assembly drawings, thereby significantly improving modeling efficiency and reliably preventing modeling errors. Effect.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a processing procedure of a modeling method according to the present invention;

FIG. 2 is a block diagram of a three-dimensional CAD system capable of implementing the modeling method;

FIG. 3 is a three-dimensional display diagram of a mounted part to be modeled by the modeling method,

FIG. 4 is a three-dimensional display diagram of a mounting part to be modeled by the modeling method,

FIG. 5 is a conceptual diagram of a processing portion to be attached obtained by a calculation process according to the modeling method;

FIG. 6 is a component diagram based on a two-dimensional display modeled by the modeling method,

FIG. 7 is a component diagram based on a three-dimensional display modeled by the modeling method,

FIG. 8 is an assembly drawing based on a three-dimensional display modeled by the modeling method,

FIG. 9 is a partial assembly diagram based on a two-dimensional display modeled by the modeling method,

FIG. 10 is a partial assembly diagram during modeling by a modeling method according to the related art;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 3D CAD system 2 Parts to be mounted 3 Mounting parts 4 Processing part to be mounted D Database

Claims (2)

[Claims] When modeling a part to be mounted on which a mounting part is to be mounted by a three-dimensional CAD system,
In addition to constructing, as a database, machining data relating to a plurality of different mounting parts and a processing portion to be mounted in a mounting part corresponding to each mounting part, and modeling the mounting part at the time of modeling, mounting the mounting part to the mounting part. By selecting a mounting part and inputting the mounting conditions of the selected mounting part, the mounting processing of the mounted part modeled based on the processing data of the database and the mounting conditions corresponding to the selected mounting part. A modeling method for a three-dimensional CAD system, characterized by executing a calculation process for obtaining machining data corresponding to a part and a modeling process for adding a workpiece to be attached to the part to be attached based on the obtained machining data. 2. The attachment processing part includes one or more of a concave part, a hole part, and a female screw part.
A modeling method for the described three-dimensional CAD system.