JPH1166145A - Cad system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a design time and to prevent trouble occurrence in a manufacturing process by comparing in-design and designed component data with restriction information of the manufacturing process and displaying the result. SOLUTION: A design information file 5 contains information on a product being designed and information on a product which is already design. A manufacturing process restriction information file 6 contains information regarding restriction items in the manufacturing process generated by a CPU 1. A comparison result information file 7 stores the result of the comparison between the product data on the products which are being designed and already designed and the restriction items of the manufacturing process. A three-dimensional measuring instrument 8 measures the dimensions of a metal mold as the restriction information of the manufacturing process. Then a restriction information generating means 1a of the CPU 1 generates the restriction information of the manufacturing process according to data inputted from an input means, a comparing means 1b compares the in-designing and designed component data and the restriction information of the manufacturing process, and a comparison information display means 1c displays the result.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mechanical CAD (Computer Aided Design) system for processing a sheet metal or the like.

[0002]

2. Description of the Related Art The shape and dimensions of products manufactured by sheet metal processing are restricted by the thickness and the shape of steel plates, bending dies, press dies, drawing dies, and the like. Conventionally, such information is represented as a list or a schematic drawing. As an example, diagrams of the bending dies 10A to 10D are shown as schematic diagrams shown in FIGS.

[0003] The designer reads the minimum bending dimension of the steel sheet, the length of the mold, and the like from these drawings, determines the shape and dimensions of the product while judging whether or not the product can be manufactured, The design was done.

[0004]

As described above, conventionally, in order to determine the shape of a product, it is necessary to refer to a number of diagrams as shown in FIGS. It takes time.

In some cases, detailed dimensions cannot be read in the diagrams as shown in FIGS. 10 to 13, and in some cases, it is impossible to judge whether or not the device can be manufactured unless it is actually manufactured.
Further, it has been found that it is impossible to manufacture at the manufacturing site, and the design must be re-designed again.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and has as its object to provide a CAD system capable of performing a design while easily confirming restrictions in a manufacturing process. I do.

[0007]

According to a first aspect of the present invention, there is provided a CAD system, comprising: input means for inputting constraints in a manufacturing process; and constraint information for creating constraint information in a manufacturing process based on the constraints. Creation means, constraint information storage means for storing constraint information, design information storage means for storing design data and already-designed component data, comparison means for comparing constraint information and component data, and comparison for storing a comparison result The apparatus includes a result information storage unit, an operation unit for inputting a comparison command to the comparison unit, a display unit for displaying the comparison result, and a comparison information display control unit for displaying the comparison result on the display unit.

According to the present invention, constraint information in the manufacturing process is created based on data input from the input means, and stored in the constraint information storage means. Then, the constraint information stored in the constraint information storage means is compared with the designed and already designed part data, and the comparison result is stored in the comparison result information storage means. The comparison result and the process of comparison are displayed on the display means by the comparison information display control means. By looking at this display result, the designer can proceed with the design while easily determining whether or not the dimensions and shape need to be changed depending on whether the part can be manufactured or not. For this reason, it is possible to reduce the design time and prevent a trouble that occurs in the manufacturing process.

In a CAD system according to a second aspect of the present invention, in the first aspect of the present invention, the constraint information is information on a die in sheet metal processing.

According to the present invention, a design can be performed while easily confirming information on a mold in sheet metal working. For this reason, it is possible to reduce the design time and prevent a trouble that occurs in the manufacturing process.

According to a third aspect of the present invention, in the CAD system according to the first or second aspect, the input means is a coordinate measuring machine.

According to the present invention, it is possible to easily input the shape and dimensions of the mold, which are restrictions in the manufacturing process.

[0013]

FIG. 1 is a block diagram showing an embodiment of a CAD system according to the present invention. In FIG. 1, a CPU 1 is control means for controlling data creation, display, storage, and the like. The keyboard 2 and the tablet 3 are input means for inputting various restrictions to the CPU 1 and restrictions in the manufacturing process such as dimensions and shapes of products to be designed.

The display 4 is a display means for displaying the shape of a part being designed or already designed and various data stored in advance. The tablet 3 is used as a device for selecting and instructing a straight line, a circle, an arc, a curve, a point, a character, and the like displayed on the display 4 in addition to inputting various commands.

The design information file 5 is design information storage means for storing information on a product under design and information on a product already designed. The manufacturing process constraint information file 6 is a constraint information storage unit that stores information on restrictions in the manufacturing process created by the CPU 1. The comparison result information file 7 is a comparison result information storage unit that stores a result of comparing product data of a product under design and an already designed product with restrictions in a manufacturing process. The three-dimensional measuring machine 8 is an input means for measuring a dimension of a mold which is a restriction in a manufacturing process.

The CPU 1 compares constraint information in the manufacturing process with constraint information creating means 1a for creating constraint information in the manufacturing process based on data input from the input means. Comparison means 1b
Information display control means 1c for displaying the result of comparison
And Keyboard 2 and tablet 3
Corresponds to the input means and the operation means, and the coordinate measuring machine 8 corresponds to the input means.

Next, the operation of this embodiment will be described. First, prior to the design of a product manufactured by sheet metal working, constraint information in the manufacturing process is registered in the manufacturing process constraint information file 6.

The cross-sectional shape, length, and the like of a mold for creating manufacturing process constraint information from the keyboard 2 and the tablet 3
When a management number or the like of a mold is input, the CPU 1 creates manufacturing process constraint information based on the input data and stores it in the manufacturing process constraint information file 6.

In designing a product, a designer selects a thickness of a steel plate to be used, determines a shape, and performs design in consideration of a use of a part, a required function, and the like.
FIG. 2 is a perspective view showing the component 9 designed in this manner. The manufacturing process of the component 9 is shown in FIGS.

First, the part 9 is made as a flat plate 9A shown in FIG.
The plate 9A has a first bending line 9a, a second bending line 9b, and a third bending line 9c for bending into the shape shown in FIG.

FIG. 4 shows a state in which the upper bending portion 9B is bent along the first bending line 9a of the plate 9A, and a state in which the lower bending portion 9C is bent along the third bending line 9c. Figure 5
It is. FIG. 2 shows a state in which the middle bent portion 9D is further bent along the second bending line 9b, and the final component 9 can be obtained. As described above, in sheet metal processing, it is general to obtain a final shape by performing several bending operations.

Next, selection of a mold at the time of bending will be described. First, the length of the mold must be longer than the length L of the bent portion 9B of the component 9 (FIG. 2). Next, it is necessary to select a mold that does not hit the part 9 when bending is performed. The selection of a mold when the component 9 is bent along the second bending line 9b will be described with reference to FIGS.

FIGS. 6 to 8 show the cross section of the part 9 and the mold 10A.
It is explanatory drawing which showed the cross section of -10C. In FIG.
The component 9 and the mold 10A are overlapped at the upper bent portion 9B of the component 9. This is because when the component 9 is bent at the portion of the second bending line 9b using the mold 10A, the upper bent portion 9B of the component 9 is formed.
Indicates that it hits the mold 10A. This indicates that the mold 10A cannot be used for bending the component 9 along the second bending line 9b.

Similarly, in FIG. 7, the part 9 and the mold 10B are overlapped at the right bent part 9C of the part 9.
Accordingly, it is understood that the mold 10B cannot be used for bending the component 9 along the second bending line 9b as in the case of FIG. In FIG. 8, there is no overlap between the component 9 and the mold 10C. Therefore, it can be seen that the molds 10A and 10B cannot be used for bending the component 9 along the second bending line 9b, but the mold 10C can be used.

Next, the operation of the CAD system according to the present invention will be described with reference to the flowchart shown in FIG. It is assumed that component data has already been input to the CPU 1 from the keyboard 2 and the tablet 3 or component data has been read from the design information file 5.

In response to a command input from the keyboard 2 or tablet 3 (step S1), the CPU
1 reads information on the first mold from the manufacturing process constraint information file 6 (step S2).

Next, the length L of the upper bent portion 9B of the component 9
And the length of the mold (Step S3). As a result, if the length L of the upper bent portion 9B of the component 9 is longer than the length of the mold, the CPU 1 describes in the comparison result information file 7 that the selected mold cannot be used (step S1). S5), proceed to the determination of the presence or absence of the next mold (step S)
7).

If the length L of the upper bent portion 9B of the component 9 is shorter than the length of the die (step S3), the CPU 1 compares the cross-sectional shapes of the component 9 and the die (step S4).
The cross-sectional shapes are compared, and as shown in FIG. 6 or FIG. 7, for example, when there is an overlap between the upper bent portion 9B or the right bent portion 9C of the component 9 and the mold, the CPU 1 stores the comparison result information file 7 in the comparison result information file 7. The fact that the selected mold is unusable is described (step S5). If there is no overlap, CPU
No. 1 describes that the selected mold is usable in the comparison result information file 7 (step S6).

When the description in the comparison result information file 7 is completed as described above, the CPU 1 checks the manufacturing process constraint information file for the presence of the next mold (step S7). here,
If there is a next mold, the information of the next mold is read (step S2), and the above-described processing is performed (steps S3 to S5).
If there is no next mold, the command input from the keyboard 2 or the tablet 3 as the operation means is terminated (step S8).

The above-described comparison process and the comparison results stored in the comparison result information file 7 are displayed on the display 4 as display means by the CPU 1 as information display control means. By looking at the display result, the designer can proceed with the design while easily determining whether the part 9 can be manufactured or whether the part 9 cannot be manufactured and the shape needs to be changed.

[0031]

According to the present invention, the constraint information in the manufacturing process is compared with the part data under design and the part data already designed,
The result can be displayed on the display means. By looking at the display result, the designer can proceed with the design while easily determining whether the part can be manufactured or not and whether the dimensions and the shape need to be changed. As a result, the design time can be shortened, a failure that occurs in the manufacturing process can be prevented, and the quality of the design can be improved.

Further, according to the present invention, even when there is no schematic diagram of the mold or when accurate dimensions cannot be read from the schematic diagram, the sectional shape data of the mold can be created.
Creation of manufacturing process constraint information is facilitated.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a perspective view of a part after processing.

FIG. 3 is a perspective view showing a state in which an outer shape and a hole are cut out by a fixed length in a manufacturing process of the part.

FIG. 4 shows a bent part of a part in a manufacturing process of the part.
It is a perspective view showing the state where it was bent along the bend line.

FIG. 5 shows a bent part of the part in the manufacturing process of the part.
It is a perspective view showing the state where it was bent along the bend line.

FIG. 6 is an explanatory diagram showing a relationship between a component and a die when the die is used when bending the component along a second bending line in the manufacturing process of the component.

FIG. 7 is an explanatory diagram showing a relationship between a component and a mold when another mold is used when the component is bent along a second bending line in a manufacturing process of the component.

FIG. 8 is an explanatory view showing a relationship between a component and a mold when another mold is used when the component is bent along a second bending line in a manufacturing process of the component.

FIG. 9 is a flowchart showing the operation of the present invention.

FIG. 10 is a diagram showing restrictions in a manufacturing process.

FIG. 11 is a diagram showing restrictions in a manufacturing process.

FIG. 12 is a diagram showing restrictions in a manufacturing process.

FIG. 13 is a diagram showing restrictions in a manufacturing process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CPU 1a Constraint information creation means 1b Comparison means 1c Comparison information display control means 2 Keyboard (input means) 3 Tablet (input means) 4 Display (display means) 5 Design information file (design information storage means) 6 Manufacturing process constraint information file (Constraint information storage means) 7 Comparison result information file (Comparison result information storage means) 8 Coordinate measuring machine (Input means) 9 Parts 9A Plate 9B-9D Bending part 9a-9c Bending line 10A-10D Mold

Claims (3)

[Claims] An input unit for inputting constraints in a manufacturing process; a constraint information creating unit for creating constraint information in a manufacturing process based on the constraints; a constraint information storage unit for storing the constraint information; Design information storage means for storing the designed and already-designed component data; comparison means for comparing the constraint information and the component data; comparison result information storage means for storing the comparison result; and a comparison instruction to the comparison means. A CAD system comprising: an operation unit for inputting the comparison result; a display unit for displaying the comparison result; and a comparison information display control unit for displaying the comparison result on the display unit. 2. The CAD system according to claim 1, wherein the constraint information is information on a die in sheet metal processing. 3. The CAD system according to claim 1, wherein said input means is a coordinate measuring machine.