JPH09136324A - Apparatus for evaluating mold cost - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly and reliably calculate costs in a short time by a method in which mold structure is prepared from molding data in the initial stage of three-dimensional data preparation, and mold preparation costs are calculated on the basis of data on dimensions, geometrical tolerance, etc. SOLUTION: The three-dimensional shape of a molding is prepared from the information of an information input means 6 by a three-dimensional data design means 1. Mold structure is prepared by a shape formation means 2 from the information of the input means 6 and the three-dimensional shape of the molding prepared by the design means 1, and information on dimensions, dimensional tolerance, geometrical tolerance, etc., is extracted by an information extraction means 3. Mold preparation costs are calculated from information obtained from the extraction means 3 and a mold data base 7 by an operation means 4, and the results are output by a result output means 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold used to assist a computer in calculating a manufacturing cost of a mold mainly required for manufacturing a molded product when designing a molded product such as a resin. The present invention relates to a cost evaluation device.

[0002]

2. Description of the Related Art When evaluating the cost of a product, it is necessary to consider not only the material cost but also the mold cost and the assembly adjustment cost. Depending on the design, the material cost will be low, but the mold cost will be high, which may increase the cost as a whole.When the design of the molded product is finished, simulate the cost of the mold cost to reduce the product cost. It is desirable to be able to grasp the total.

Conventionally, when performing cost evaluation of a mold of a molded product, a two-dimensional drawing of the molded product is created, a prototype is created several times by another construction method, and then the final two-dimensional drawing is used. A mold designer creates a layout or a mold design concept drawing such as a split shape, a structure, etc. Based on the drawing, a person in charge of estimation calculates in detail material costs, processing costs, etc. for each cost item and It was piled up and the cost was evaluated.

[0004]

However, in the above-mentioned conventional method, first, a die design concept drawing is created from a two-dimensional drawing of a molded product, and the production cost is calculated based on the two-dimensional drawing based on human experience and intuition. However, the weight, which is important in the cost evaluation, is difficult to obtain with high accuracy when the shape is complicated, so there is a problem that the cost accuracy is low.

Further, in the method of evaluating the cost of the mold from the mold design concept drawing created based on the final two-dimensional drawing of the molded product, the cost of the mold is considerably calculated after the design of the molded product is finished. However, there is a problem that if the situation of redesigning occurs again, the cost and time will be increased accordingly.

The present invention is intended to solve the above-mentioned conventional problems. A mold structure is created from molded product data at the initial stage of three-dimensional data creation, and further, dimensions, geometrical tolerances, etc. It is an object of the present invention to provide a die cost evaluation device capable of performing extremely reliable cost calculation in a short time by calculating the die making cost based on data.

[0007]

In order to solve this problem, the present invention automatically creates a schematic structure of a mold by shape generation means based on molded product data designed by three-dimensional data design means, and The extraction means extracts the information about the molded product and the mold and uses the information to calculate the cost for creating the mold.

This makes it possible to calculate the mold cost with extremely high reliability in a short time.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in the claims of the present invention
Three-dimensional data design means for creating a three-dimensional shape of a molded product, and three of the molded product created by this three-dimensional data design means
Shape generating means for creating a mold structure from a dimensional shape, information extracting means for extracting information such as dimensions, dimensional tolerances, geometrical tolerances, a die database for storing die data, the information extracting means and the die The molded product data is designed by a three-dimensional data designing means, which comprises a calculating means for calculating the cost of producing the mold from the information obtained from the database and a result outputting means for outputting the result of the calculating means. Since the outline structure of the mold is automatically created by the shape generation means based on the above, the mold cost can be taken into consideration when creating the three-dimensional data of the molded product, and the cost can be totally judged at the initial stage of design. Further, since the information of the molded product and the mold is extracted by the information extracting means, the estimation can be performed with high accuracy.

An embodiment of the present invention will be described below with reference to the drawings. 1 is a block diagram showing the overall configuration of a mold cost evaluation apparatus according to an embodiment of the present invention, FIG.
3 is a block diagram showing the details of the shape generating means, the information extracting means, and the calculating means used in the mold cost evaluation apparatus, FIG.
(A)-(d) is explanatory drawing of the shape generation example by the same mold cost evaluation device, and FIG.4 (a), (b) is explanatory drawing of the shape check example by the same mold cost evaluation device.

In FIG. 1, reference numeral 1 is a three-dimensional data designing means for creating a three-dimensional shape of a molded product. Reference numeral 2 denotes a shape generation means, which creates a mold structure from the three-dimensional shape of the molded product created by the three-dimensional data design means 1. Reference numeral 3 is an information extraction means, which is a three-dimensional data design means 1 and a shape generation means 2.
Information such as dimensions, dimensional tolerances, and geometrical tolerances is extracted from.
Reference numeral 4 denotes a computing means, which calculates the cost of making the mold from the information obtained from the information extracting means 3 and the mold database 7. Reference numeral 5 is a result output unit, which outputs the calculation result of the calculation unit 4. Reference numeral 6 denotes an information input means for inputting information required when the three-dimensional data design means 1 creates three-dimensional data and when the shape generation means 2 creates a mold structure.

The details of the shape generating means 2, the information extracting means 3 and the calculating means 4 will be described with reference to FIG. 2. The shape generating means 2 is a shape inverting means 1 for cutting a molded product from a raw material.
1 and the shape dividing means 12 for dividing the inverted shape, and the information extracting means 3 includes the shape dividing means 12 described above.
Shape checking means 1 for checking the shape divided by
3, dimensional data extracting means 14 for extracting dimensional data from the three-dimensional data designing means 1, dimensional tolerance extracting means 15 for extracting dimensional tolerances, geometrical tolerance extracting means 1 for extracting geometrical tolerances
6, the calculation means 4 includes a mold database 7
It comprises database collating means 17 for extracting data from, and arithmetic means 18 for calculating the die cost from the extracted data.

The operation of the above configuration will be described below with reference to the shape generation diagram shown in FIG. 3 and the shape check diagram shown in FIG.

FIG. 3 created by the three-dimensional data design means 1.
In the shape reversing means 11 of the shape generating means 2 for creating a mold structure from the three-dimensional shape data A of the molded product shown in (a) and the raw material B shown in FIG. 3 (b) obtained by the information input means 6. , The shape C of FIG. 3C is created by the following equation.

Shape (B) -Shape (A) = Shape (C) Equation (1) By the shape dividing means 12 of the shape generating means 2, the surface (surface 1 in FIG. 3) obtained from the information input means 6 is calculated. Originally, FIG. 3 (c)
The shape C shown in FIG. 3 is divided to create the shape D shown in FIG.

The information extracting means 3 is a shape called an undercut from the divided shape D shown in FIG. 3 (d) obtained by the shape dividing means 12 as described above and the molded product shape 4 shown in FIG. 3 (a). To detect. First, as shown in FIG. 4A, FIG.
The divided shape D shown in (d) and the molded product shape A shown in FIG. 3 (a) are combined. Next, each shape in FIG. 4A is divided as shown in FIG.

Specifically, first, the shape (a) is moved in the arrow direction, and then the shape (a) is moved in the arrow direction. At this time, when moving as shown in FIG. 4B, the hatched portion α of the shape (a) hits. This part is called undercut, and the number h of this part is detected. Dimension extraction means 1
In 4, the length x, the width y, and the height z, which are the sizes of the shape shown in FIG. 3C obtained by the shape inverting means 11, are calculated. The dimension tolerance extracting means 15 extracts the dimension tolerance data from the data of the molded product designed by the three-dimensional data designing means 1. For example, the dimension is 10
When 0 ± 0.05, the tolerance of 100 minutes is 1 and 10
Count the tolerance n of the 0 minute range. Geometrical tolerance extraction means 16
At, the geometrical tolerance is extracted from the data of the molded product designed by the three-dimensional data designing means 1. In the present embodiment, the geometrical tolerances to be extracted are straightness tolerance / flatness tolerance /
Roundness tolerance, cylindricity tolerance, parallelism tolerance, squareness tolerance, inclination tolerance, position tolerance, the number of which is k1, k2, k3.
・ K4 ・ k5 ・ k6 ・ k7 ・ k8 are counted.

In the database collating means 17 of the computing means 4, first, necessary data is searched based on the information sent by the information extracting means 3. In this embodiment, an undercut coefficient A, a material coefficient B, a dimensional tolerance coefficient C, and a geometrical tolerance coefficient D1, D2, D3, D4. D5 / D
6 ・ D7 ・ D8 is searched, and the cost of the die cost is calculated by the following formula based on the coefficient.

Mold cost = {h × A + (x × y × z) × B + C + (k1 × D1 + k2 × D2 + k3 × D3 + k4 × D4 + k5 × D5 + k6 × D6 + k7 × D7 + k8 × D8)} × m (2) Result output means At 5, the die cost calculated by the calculation output means 4 is printed or output to a CRT or the like.

As described above, according to the above-described embodiment, since the outline structure of the mold is automatically created by the shape generating means 2 based on the molded product data designed by the three-dimensional data designing means 1, the 3 The mold cost can be taken into consideration when creating the dimension data, and the cost can be totally judged at the initial stage of design. Further, since the information of the molded product and the mold is extracted by the information extracting means 3, the estimation can be performed with high accuracy.

[0021]

As described above, according to the present invention, 3
Since the schematic structure of the mold is automatically created by the shape generation means based on the molded product data designed by the dimensional data design means, the mold cost can be taken into consideration when creating the three-dimensional data of the molded product, and the cost can be reduced. It is possible to make a total judgment in the early stages of design. Moreover, since the information of the molded product and the mold is extracted by the information extracting means, the estimation can be performed with high accuracy. Therefore, extremely reliable cost calculation can be performed in a short time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the overall configuration of a mold cost evaluation apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a detailed configuration of a shape generation unit, an information extraction unit, and a calculation unit of the mold cost evaluation apparatus.

FIG. 3 is a perspective view showing an example of shape generation by the mold cost evaluation device.

FIG. 4 is a side view showing a shape check example by the mold cost evaluation device.

[Brief description of reference numerals]

 1 3D data design means 2 Shape generation means 3 Information extraction means 4 Calculation means 5 Result output means 6 Information input means 7 Mold database

Claims (1)

[Claims] 1. A three-dimensional data design means for creating a three-dimensional shape of a molded product, a shape generation means for creating a mold structure from the three-dimensional shape of the molded product created by the three-dimensional data design means, and dimensions. , An information extraction means for extracting information such as dimensional tolerance and geometrical tolerance, a die database for storing die data, and a die making cost calculated from the information obtained from the information extraction means and the die database. A mold cost evaluation apparatus comprising a calculation means and a result output means for outputting a result of the calculation means.