JP3180536B2 - Design method and design support system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a support system for designing a forged product, and more particularly, to an automatic operation for obtaining a product shape before forging from a product shape after forging.

[0002]

2. Description of the Related Art In order to obtain a product having a desired shape by forging, it is necessary to correctly obtain a product shape before forging from a product shape after forging. Forging, for example, is configured by sequentially performing rough land punching that performs preliminary formation using a rough land mold and final finishing that performs final forming using a finishing die. Shape) to rough land shape (shape after hitting rough land, ie before finishing)
It is necessary to find the right.

[0003] In the conventional design method, when a product shape after forging is divided into a plurality of shapes along the direction in which the product is forged, a designer is required to determine the cross section after forging and the cross section before forging for each divided portion. According to the relationship established between them, the cross-sectional shape before forging is obtained from the cross-sectional shape after forging, and the product shape before forging is obtained using the obtained plural cross-sectional shapes.

[0004]

However, it is troublesome and time-consuming for a designer to obtain a cross-sectional shape before forging for each divided part of a product shape, and there is a limit in improving the design efficiency. There was a problem.

[0005] Against this background, the invention of claim 1 solves the above problem by providing a design method for automatically obtaining a product shape before forging from a product shape after forging using a computer. The task was to do.

A second object of the present invention is to solve the above-mentioned problem by providing a design support system for automatically obtaining a product shape before forging from a product shape after forging. is there.

[0007]

Means for Solving the Problems In order to solve the respective problems, the invention of claim 1 provides a method for obtaining a shape before forging from a shape after forging of a product manufactured by forging.
(1) Forging the product shape after forging to the computer
Represents each divided part when divided into multiple along the direction
Shape of the cross section to be formed and the cross section after forging and the cross section before forging
Change in the product ratio and several dimensions that define the cross section after forging
To fix the variable dimensions that the designer wants
Enter the desired fixed dimensions and enter
And (2) the information entered.
Based on the computer, each of the product shape before forging
For each division, variable dimensions to achieve the input area ratio
Value, and forging is performed based on the value and the value of the fixed dimension.
And the step of obtaining the previous product shape.
It is a sign.

[0008] Here, "the product shape after forging"
For the “product shape before forging”, for example, a product shape after finish beating (finished shape) and a product shape after rough beating (rough ground shape) can be selected, and rough ground beating is performed a plurality of times. In this case, it is also possible to select the product shape after and after each rough slashing.

[0009] The "inputting step" means all actions that result in information being supplied to the computer in accordance with the intention of the designer, and the designer directly inputs the information through the input means. Not only when the information is supplied to the computer but also when, for example, the designer inputs only a transfer command to the computer via the input means, and the computer reads out the information stored in advance from the external storage device in response to the instruction. Includes importing to a computer.

[0010]

[0011] The invention of claim 2 provides a system for supporting an operation for obtaining a shape before forging from a shape after forging of a product manufactured by forging.
Product is divided into multiple parts along the direction in which it extends
Shape of the cross section representing each divided part in the case and the cross section after forging
Define the area ratio of the section before and forging, and the section after forging
Variable that the designer wants to change among multiple dimensions
Enter the dimension and the fixed dimension you want to fix
In both cases, it is possible to enter values for fixed dimensions
Input means, and (b) a control based on the input information.
By pewter, for each divided part of the product shape before forging,
Find the value of the variable dimension that realizes the input area ratio,
Based on the value and the value of the fixed dimension, the product shape before forging is
(C) at least the product shape before forging
And display means for displaying on the screen.
It is a feature.

[0012]

[Function] The designer gives the computer a forged product
When a shape is divided into multiple parts along the direction
Cross-sectional shape representing each split, cross-section after forging and forging
Enter the area ratio with the previous section. Also, the cross section after forging
Designers rarely want to change among the dimensions that define
Between the desired variable dimensions and the fixed dimensions
Along with the input, a value is also input for the fixed dimension.

The product is divided into a plurality of parts along the direction in which the product extends.
The cross section after forging at each division when split
A certain relationship is established with the cross section. So, Compu
Based on the information entered above, the product shape before forging
Variable to achieve the input area ratio for each division of the shape
Calculate the value of the dimension and input it by the designer
Product shape before forging based on the fixed dimension value
Can be asked.

Further, by utilizing the same facts, in the design support system according to the second aspect of the present invention , the processing means automatically performs processing based on the information input by the input means.
Find the product shape before forging.

[0015]

As is apparent from the above description, according to each of the first and second aspects of the present invention, the product shape before forging can be automatically obtained as long as necessary information is given by the designer. The burden on the designer is reduced,
The effect that the design efficiency is improved is obtained. Moreover, forging
You can enter the area ratio between the cross section after forging and the cross section before forging.
Freer than when the area ratio is limited
It is possible to obtain a product shape before forging with a large degree
On the other hand, several dimensions that define the cross section after forging are acceptable.
It is possible to specify whether it is a variable size or a fixed size
To avoid unnecessary increase in the degree of freedom
Processing can be completed. In particular, the invention of claim 2
According to the display means at least the product shape before forging is displayed on the screen
Is displayed on the screen.
The input means can be operated while designing easily.
be able to.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention;

FIG. 2 shows a hardware device configuration of a design support system mainly composed of a computer. This design support system is configured to include an input / output device, a processing device, and a display device. The input / output device is, for example, an input device 20 such as a keyboard 10, a mouse 12, a light pen (or a stylus pen of a digitizer) 14, a joystick 16, a dial (function selection means) 18, and an output from a hard copy 22, a plotter 24, and the like. It is configured to include a device 30, a magnetic disk device 32, a magnetic tape device 34, an auxiliary storage device 40 such as a CD-ROM device 36, and the like. The display device 50 includes a graphic controller 52 mainly composed of a computer and a CR.
It is configured to include the T device 54 and the like. The design support system is connected to another system (not shown) via a transmission line 60, and forms a network in cooperation with each other.

Using this design support system, a designer can perform a design by operating the input device 20 while looking at the product shape and the like displayed on the screen of the CRT device 54. The designed contents and the like can be stored and stored as data in the auxiliary storage device 40, or can be output on paper by the hard copy 22 or the plotter 24.

As shown in FIG. 3, the processing device 70
It is mainly configured by a computer 78 including a U72, a ROM 74 and a RAM 76. Various programs for design support are stored in the ROM 74 in advance.
The PU 72 executes this design support program according to a command from the designer. This program includes a rough land shape determination program for automatically obtaining a rough land shape from a finished shape of a die forging. Hereinafter, the wasteland shape determination program will be described with reference to the flowchart of FIG. 1 and an example of a case where a wasteland design is performed on a component (a product having a finished shape) shown in a perspective view in FIG.

First, in step S10 of FIG. 1 (hereinafter simply referred to as S10; the same applies to other steps), each division in the case where the finished shape of the forged product is divided into a plurality of portions along the direction in which it extends. The value of the copy number n is 1.

Next, in S20, based on the operation of the input device 20 by the designer, the shape of the finished section, which is the section representing the n-th divided portion of the finished shape, is input. Data defining the outline of the finished section is input. For example, for a divided portion shown in a perspective view in FIG. 5, a finished cross section is input as shown in FIG. Then, S3
At 0, a partially finished solid model, which is a solid model of the finished shape of the n-th divided portion, is created based on the operation of the designer. The input finished cross section is used as a basic cross section, which is positioned by movement / rotation, and is subjected to a set operation, whereby the n-th divided portion is converted into a solid model. Subsequently, in S40, whether or not a partially finished solid model has been created for all of the plurality of divided parts,
That is, it is determined whether the creation of the partially finished solid model has been completed. If not, S
At 50, after the number n is incremented by one, the process returns to S20. However, when the process is completed, the process proceeds to S60 and subsequent steps.

In S60, based on the operation of the designer, a collective operation is performed on these partial finish solid models to create an overall finish solid model that is a solid model of the entire finish shape of the forged product.

Thereafter, in S70, the division number n
Value is the one again, in S80, every n-th division section, the area A _n of finishing section is calculated. The area of the divided portion surrounded by the closed loop, which is the outline of the cross section, is calculated. In the example of FIG. 6, the area of the region hatched by oblique lines in FIG. 7 is calculated.

Subsequently, in S90, based on the operation of the designer, the area ratio P _n between the finished section and the rough land cross-section, which is a cross section of the rough land shape, is input to the current divided portion. Thereafter, in S100, a value of a fixed dimension that the designer desires to fix among a plurality of dimensions defining the cross section is input to the current divided portion. For example, in the example of FIG.
For example, as shown in FIG. 8, H _a1 , R _a1 , R _a2 , R _a3 ,
W _a1 , W _a2 , φ _a1, and φ _a2 have fixed dimensions, and a value is input for each. Each value can be the same value as in the finished cross section or a different value.

Thereafter, in S110, a variable dimension desired by the designer to be changed among a plurality of dimensions defining the cross section is designated for the current division. For example, in the example of FIG. 6, _Ha2 is designated as a variable dimension as shown in FIG. Subsequently, in S120, a target value of the area _Bn of the rough land cross section is calculated for the current division. Than it is calculated as the product of the area of the finishing section A _n and the area ratio P _n.

Thereafter, in step S130, the value of the variable dimension is set within a certain range with respect to the initial value (the corresponding dimension value in the finished shape or the input value by the designer) for the current divided portion, and is sequentially changed by a fixed amount. A plurality of candidate values of variable dimensions are set by being changed, and the area _{Bn of the} rough cross section is calculated for each of the candidate values. Further, of the plurality of candidate values, the candidate value whose corresponding area _Bn is closest to the target area value of the rough terrain section is selected, and this is set as the final value of the variable dimension. Then, in S140,
The value of the variable dimension determined in this way and the value of the fixed dimension form the cross section of the rough terrain.

Subsequently, in S150, based on the created rough terrain cross section, a partial rough solid model, which is a solid model of the n-th divided portion of the rough terrain shape, is created based on the operation of the designer. For example, for the partially finished solid model of FIG. 5, a partially rough solid model is created as shown in FIG. Thereafter, in S160, it is determined whether or not the partial wasteland solid model has been created for all of the plurality of divided portions, that is, whether or not the creation of the partial wasteland solid model has been completed. If the processing has not been completed, the process returns to S80 after the value of n is incremented by 1 in S170.
Move to 0. In S180, a collective operation is performed on the partial wasteland solid models based on the operation of the designer to create an overall wasteland solid model that is a solid model of the entire wasteland shape. This completes one execution of this program.

Therefore, in this embodiment, since the rough land design is automatically performed, the burden on the designer is reduced, the design efficiency is improved, and the rough land design can be performed in a short time. The effect is obtained.

Further, in this embodiment, since the design is performed using the solid model, it is easier to accurately reflect the intention of the designer in the product as compared with the case where only the wire frame model or the surface model is used. Becomes
The specific effects of improving the design quality and easily reducing the lead time from design to production can be obtained. However, it is a matter of course that the invention of each claim can be applied to a design using a model other than the solid model.

In this embodiment, since only one kind of combination of a plurality of fixed dimension values of the cross section can be input for each divided portion of the product, only one rough land cross-sectional shape is created for each divided portion of the product. Can not do it. However, for example, it is possible to input a plurality of combinations of fixed dimension values, individually create a rough land cross-sectional shape for each combination, and select a candidate rough land cross-sectional shape desired by a designer as a final rough land cross-sectional shape. It is also possible to carry out the invention of each claim so that it can be selected.

As is apparent from the above description, in the present embodiment, the design method according to the first aspect of the present invention is implemented by the rough land shape determination program shown in FIG. Further, the input device 20 is connected to the processing device 70 at S20, S3 in FIG.
0,60,90,100,110,150 and 180
Of the "input means" in the invention of claim 2 in cooperation with the part for executing S10, S40, S50, S50 in FIG.
70, 80, 120, 130, 140, 160 and 1
The part that executes 70 constitutes an example of “processing means”, and the display device 50 constitutes an example of “display means”.

Although the invention of each claim has been specifically described based on the illustrated embodiment, various modifications may be made based on the knowledge of those skilled in the art without departing from the scope of the claims. The invention of each claim can be carried out in an improved mode.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a wasteland shape determination program according to an embodiment common to the claimed inventions.

FIG. 2 is a diagram illustrating a hardware device configuration of a design support system that executes the wasteland shape determination program.

FIG. 3 is a diagram conceptually showing a configuration of a processing apparatus in FIG. 2;

FIG. 4 is a perspective view of a part (finished shape) used to explain the rough land shape determination program of FIG. 1;

5 is a perspective view showing one of a plurality of finishing divisions of the component of FIG. 4;

FIG. 6 is a view showing an outline of a finish cross section representing the finish division portion of FIG. 5;

FIG. 7 is a diagram showing an area calculated for the finished cross section of FIG. 6;

FIG. 8 is a diagram showing an outline of a rough land cross section corresponding to the finished cross section of FIG. 6;

FIG. 9 is a perspective view showing a waste land division corresponding to the finish division shown in FIG. 5;

[Explanation of symbols]

 Reference Signs List 20 input device 30 output device 40 auxiliary storage device 50 display device 70 processing device

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Susumu Yamada 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (56) References JP-A-7-49899 (JP, A) JP-A-6-344066 (JP, A) JP-A-6-328180 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21J 1/00-13/14 B21J 17/00-19/04 B21K 1 / 00-31/00 G06F 17/50 B21D 53/86

Claims (2)

(57) [Claims] 1. A method for obtaining a shape before forging from a shape after forging of a product manufactured by forging, wherein the computer extends the shape of the product after forging to a computer.
Represents each division when divided into multiple along the direction
Cross section shape and area ratio between cross section after forging and cross section before forging
Of the multiple dimensions that define the cross section after forging
Wants to fix the variable dimensions that the designer wants
Enter the fixed dimensions and the fixed dimensions.
Is based on the process of entering the values and the information entered,
The area ratio entered for each part of the product shape before forging
The value of the variable dimension that realizes
Determining the product shape before forging based on the value of
Method for designing a product shape before forging, wherein the free it. 2. A system for supporting an operation for obtaining a shape before forging from a shape after forging of a product manufactured by forging, wherein the computer extends the shape of the product after forging to a computer.
Represents each division when divided into multiple along the direction
Cross section shape and area ratio between cross section after forging and cross section before forging
Of the multiple dimensions that define the cross section after forging
Wants to fix the variable dimensions that the designer wants
Enter the fixed dimensions and the fixed dimensions.
Is a computer based on the input means that can enter the value and the information entered,
The area ratio entered for each part of the product shape before forging
The value of the variable dimension that realizes
And a display means for displaying at least a product shape before forging on a screen based on a value of the product shape before forging .