JP2000322459A - Sheet metal expansion drawing preparing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily prepare a real expansion drawing while considering correction values and to easily perform the change of respective values, addition of graphics or separation of respective surfaces after surface synthesis. SOLUTION: This device is provided with a surface graphic preparing means 6 for individually preparing respective surface graphics A1-A3 of three- dimensional components to be formed by bending a sheet metal, a means 13 for synthesizing the respective surface graphics A1-A3 into expansion drawing with no dimension change, a temporary expansion drawing preparing means 7 for preparing a temporary expansion drawing G2 as a drawing, to which correction data are applied concerning a working side required for real bending, and a real expansion drawing preparing means 9 for preparing a real expansion drawing G3 as a drawing correcting the temporary expansion drawing G2 with the said correction data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for developing a developed sheet metal for bending.

[0002]

2. Description of the Related Art For example, when a sheet metal is bent to make a box body,
As shown in FIG. 4 (A) as an example, figures A1 to A3 of each surface of the box body are drawn by CAD, and the surfaces are combined to form a surface before bending (see FIG. 4 (C)). ) To create. This actual development diagram shows that the bending line m
(B) of FIG.
It is necessary to correct as follows. This correction is performed by a bending correction value k for elongation of a sheet metal when bending is actually performed.
And the amount of relief i required at the butted portion depending on the thickness of the sheet metal, the addition of a notch j, and the like. Generally, such correction is performed according to a menu display by CAD or the like.
It is done manually.

[0003]

However, since the planes are combined after correcting the plane views as described above, there are the following problems. Manual input such as addition of the notch j is troublesome, and it takes time to create an actual development view. Bending correction value k and escape amount i
Can not make changes. 5A and 5B show a development view in which correction is taken into consideration, as shown in FIGS. 5A and 5B, the dimensions y of the window positions before and after the combination. It is difficult to add such a window figure or the like. Each view cannot be separated from the developed view after the plane synthesis.

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to easily create an actual development view in consideration of a correction value, and to make it easy to change each value, add a figure, or separate each surface after surface synthesis. An object of the present invention is to provide a diagram creating device.

[0005]

The structure of the present invention will be described with reference to FIG. 1 corresponding to an embodiment. This sheet metal development view creation device includes surface figure preparing means (6) for individually preparing each surface figure (A1 to A3) of a three-dimensional component formed by bending a sheet metal, and each of the surface figures (A1 to A3). ) Is combined with the developed view without changing the dimensions, and the combined figure (G
A temporary development view (G) in which correction data is given for a processing side that needs correction in actual bending processing for 1).
(2) a temporary development view creating means (7); and an actual development view creation means (9) for creating an actual development view (G3), which is a view obtained by correcting the temporary development view (G2) with the correction data. It is provided with. The surface figure preparing means (6) may be means for assisting the drawing and causing the operator to draw, or may be means for inputting and preparing each of the already drawn surface figures. According to this configuration, after the surface synthesis, the correction data for the processing side that needs to be corrected for the actual bending processing, such as a bending line or a butt side, is not generated by the temporary development view creating means (7) after the surface synthesis. A provisional development diagram (G2), which is the given diagram, is created. This temporary development view (G2) is a development view before correction value consideration, in which only the information of the bending and the like are held and only the surfaces of the original surface figures (A1 to A3) are in contact with each other. It is. After the creation of the provisional development map (G2), the actual development map (G3) is prepared by correcting the respective parts collectively with the correction data by the actual development map creating means (9). As described above, since the provisional development view (G2) is created, the following advantages can be obtained. Since all planes can be processed collectively to create an actual development view (G3), there is no need to cut out before plane synthesis. Therefore, it is possible to easily create the actual development diagram (G3). Since the temporary development diagram (G2) only has the bending correction data as attribute data and the like, the temporary development diagram (G2)
, These values can be easily changed. In the provisional development view (G2), since all the surfaces are represented by actual dimensions, that is, dimensions in which correction is not taken into account, it is possible to easily add a window figure or the like. Since the figure is not actually corrected, separation of the surface can be easily realized.

In the present invention, a provisionally developed view display means (15) for displaying the provisionally developed view (G2) on the screen of the screen display means (2) may be provided. In this way, by providing the provisional development view display means (15) and displaying the provisional development view (G2) on the screen, the processing of adding or separating the above-mentioned figures can be performed even more easily.

In the present invention, each surface figure (A1 to A
When 3) is surface-combined, a bend line specifying means (16) for specifying the joined side as a bend line may be provided in the temporary development view creating means (7). Thus, the bending line specifying means (1)
By providing 6), the bending line is specified without the operator giving an instruction, and the input operation is further facilitated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a functional block diagram showing a conceptual configuration of the sheet metal development view creating apparatus. This sheet metal development view creation device will explain the hardware configuration.
An information processing device 1 mainly including a central processing unit and memories of a computer device; a screen display means 2 which is a screen output device such as a CRT and a liquid crystal display device connected to the information processing device 1; A keyboard, a mouse, and other input means 3 for inputting commands. In the drawing, a plurality of screen examples displayed on the screen display means 2 are described together. The information processing apparatus 1 is capable of inputting / outputting to / from a flexible disk or other external storage medium 4, and also includes a modem, a terminal adapter, and the like that communicate with other information processing apparatuses via a local area network, a telephone line network, or the like. It is connected to the communication means 5.

This sheet metal development view creation apparatus uses the information processing apparatus 1 and programs and data stored in the information processing apparatus 1 to prepare each surface figure preparing means 6, temporary development view creation means 7, temporary development view data storage means 8, actual development view The figure creation means 9 and the actual development view data storage means are constituted.

Each surface graphic preparing means 6 is a means for individually preparing each surface graphic of a three-dimensional component formed by bending a sheet metal, and has a function of displaying each prepared surface graphic on the screen display means 2. Is provided. The preparation of each plane figure by each plane figure preparing means 6 may be performed by utilizing this means 6 or may be performed by inputting prepared figure data from outside. In this example, each surface figure preparing means 6
Has a drawing support means 11 which is a so-called CAD for supporting drawing, and a graphic data input means 12 for inputting graphic data from outside.

[0011] The provisional development diagram creating means 7 converts each of the surface figures A1 to A3 (screen example 2A) prepared by each of the surface figure preparing means 6 to
A temporary development view G2 (is a view in which corrections are given to the processing side that needs to be corrected for the actual bending process with respect to the drawing G1 obtained by performing the surface synthesis to the development view (screen example 2B) without the dimension change and the plane synthesis view G1. This is a means for creating a screen example 2C). The provisional development view data storage means 8 is a means for storing the provisional development view data 24 created by the provisional development view creation means 7, and is provided in a predetermined storage area of a memory or a storage medium.

As shown in the provisional development map data storage means 8, the provisional development map G2 is composed of provisional development map data consisting of line data as data of each line constituting the development map and attribute data. You. The attribute data of the temporary development view includes bending line information and butt side information in addition to the material and thickness of the sheet metal as the material. The bending line information includes bending line identification information that specifies which line is a bending line among the lines constituting the surface synthesis diagram that is simply a surface synthesis diagram, a bending angle of the bending line, and a curved surface shape. Includes the bending radius, if any. The butt side information includes butt line identification information that specifies which of the lines constituting the surface composite diagram is the butt side, and the escape direction required when the butt sides are matched with the actual sheet metal. , And escape amount information. The relief amount is, for example, αt + β (t is the plate thickness, α
And β are constants arbitrarily set according to the material, the butting angle, and other conditions.)

[0013] More specifically, the provisional development view creating means 7 includes a surface synthesizing means 13, a provisional development view display means 15, and a bending line identification means 1.
6. It has a butting line specifying means 17, various data input means 18, and additional updating means 19. The plane synthesizing means 13 is a means for plane synthesizing each of the plane figures prepared by each plane figure preparing means 6, and displays on the screen display means 2 an input operation guide for performing the plane synthesizing. This is a means for displaying a combined surface view G1 which is a combined developed view. The means for displaying the composite surface diagram G1 is the composite surface display unit 14. The provisional development view display means 15 displays the provisional development view G2 in which the attribute data is added to the surface composite view as described above on the screen display means 2.
This is a means for displaying the information. The figure itself displayed on the screen display means 2 by the tentative development view display means 15 may be the same as the plane composite figure G1, or a display indicating that attribute information has been added to the plane composite figure G1. May be applied. The display indicating that the attribute information has been added is performed by, for example, changing the color, thickness, or line type of the line.

The bend line specifying means 17 is a means for specifying a combined edge as a bend line when each surface figure is synthesized. This bend line may be specified by automatically specifying all fitted sides as bend lines, or specified by an operator's input, or by having the operator confirm the automatically specified bend line and determining the specification. You may do it. The butting line specifying means 17 is a means for specifying, as an abutting edge, an operator's input instruction with respect to a plane composite diagram obtained by synthesizing each of the surface figures, and has a function of displaying a message for guiding the operator's input instruction on the screen. have. Various data input instructing means 18 is a means for inputting necessary attribute data such as plate thickness, material, bending angle and the like as a temporary development view, and displays a message for guiding input operation of necessary data on the screen display means 2. With the ability to The adding / updating unit 19 is a unit that performs addition, deletion, change, separation, and the like of the graphic with respect to the temporary development map G2 created temporarily.

The actual development diagram creation means 9 converts the provisional development diagram G2 into
This is a means for creating an actual development diagram G3 which is a diagram corrected by the correction data given as attribute data to the temporary development diagram G2. The actual development view creating means 9 has a correction means 20, and the correction means 20 uses the correction data for a part of the figure which can be directly corrected by the correction data included in the provisional development view G2. Correction is performed directly, and for a portion that cannot be corrected directly, a predetermined operation is performed from the correction data, or the correction data is corrected by comparing it with a predetermined correction value table set in advance. The correction means 20 specifically performs bending correction as one of the corrections. The bending correction value is calculated from values held in the temporary development diagram G2, such as the material of the plate material, the plate thickness, the bending angle, the bending radius, and the like, or acquired from the bending correction value table 22 registered in advance. The means for performing this calculation is the bending correction value calculating means 21. The bending correction value table 22 is a table in which combinations of the above-described materials, plate thicknesses, bending angles, bending radii, and the like are associated with bending correction values. Either one of the bending correction value calculating means 21 and the bending correction value table 22 may be provided, or both may be provided and used properly according to appropriate conditions.

The actual developed view display means 23 is a means for displaying the created actual developed view G3 on the screen display means 2. The actual developed view data storage means 10 stores the created actual developed view G3.
Is the means for storing the line data.

Next, a description will be given of a method of creating an actual development diagram with the above configuration. First, FIG.
As shown in FIG.
Prepare A3 individually. After each of these surface figures A1 to A3 is subjected to surface synthesis as shown in FIG. 2 (B) by the provisionally developed view creation means 7, information on the bending angle is added to the bending line a for the surface synthesis diagram G1. A temporary development map G2 (FIG. 2 (C)) is created in which information on the escape amount of the butting is held in the butting side b. The bent side a specifies the combined side as the bent line a when the bend line specifying unit 16 synthesizes the plane figures A1 to A3. The operator inputs designation of the butting side b.

The temporary development map G2 (FIG. 2)
(B)) is a development view of a stage before consideration of a correction value in which only information on bending and the like are held and only the surfaces of the original surface figures A1 to A3 are in contact with each other. After the creation of the provisional development view G2, the actual development view creation means 9 creates an actual development view G3 (FIG. 2D) in which each part is collectively corrected with the correction data. By this collective correction, the notch c corresponding to the plate thickness is automatically drawn. In the process of creating the development view G3 by the collective correction, for example, as shown in FIG. 3, each of the surface figures A1 'to A3' corrected with the correction data is created as line data not particularly shown on the screen display means 2. Alternatively, the surface figures A1 'to A3' at such an intermediate stage may be used.
May be created directly without creating the actual development diagram G3.

Since the provisional development map G2 is created as described above, the following advantages can be obtained. Since all planes can be processed collectively to create the actual developed view G3, there is no need to make a cutout c before plane synthesis. Therefore, the actual development diagram G3 can be easily created. Since the temporary development map G2 only has bending correction data as attribute data or the like, these values can be easily changed with respect to the temporary development map G2. In the provisional development view G2, all the surfaces are represented by the actual size, that is, dimensions in which the correction is not considered, so that a window figure or the like can be easily added. Since the provisionally developed view G2 is not an actually corrected view, separation of the surface can be easily realized.

[0020]

According to the present invention, a sheet metal developed view creating apparatus combines surfaces of each surface figure into a developed view with no dimensional change, and corrects the processed side necessary for actual bending processing for the combined figure. The provision of a tentative development map creation means that creates a tentative development map, which is a diagram given with, allows easy creation of an actual development map in consideration of correction values. In addition, separation of each surface can be easily performed. In the case where provisional development view display means for displaying the provisional development view on the screen of the screen display means is provided, processing such as addition and separation of graphics can be performed even more easily. In addition, when the bending pattern specifying means for specifying the fitted side as a bending line is provided in the temporary development view creating means when the surface figures are synthesized, the input operation of the operator is further simplified.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a conceptual configuration of a sheet metal development view creating apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a process of creating an actual developed view from each surface figure by the sheet metal developed view creating apparatus.

FIG. 3 is an explanatory diagram virtually showing an example of an arithmetic processing for creating an actual development view from a provisional development view in the drawing.

FIG. 4 is an explanatory diagram showing a process of creating an actual development diagram by conventional CAD.

FIG. 5 is an explanatory diagram showing a relationship between a created actual development view and its change processing together with dimensions.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Information processing means 2 ... Screen display means 6 ... Each plane figure preparation means 7 ... Temporary development view creation means 9 ... Actual development view creation means 13 ... Surface synthesis means 14 ... Surface synthesis view display means 15 ... Temporary development view display means DESCRIPTION OF SYMBOLS 16 ... Bending line specification means 17 ... Butt line specification means 20 ... Correction means 21 ... Bending correction value calculation means 22 ... Bending correction value table 23 ... Actual development view display means A1-A3 ... Each surface figure G1 ... Surface composite figure G2 ... Temporary development G3: Actual development a: Bending line b: Butt edge c: Notch

Claims (3)

[Claims] 1. A surface figure preparing means for individually preparing each surface figure of a three-dimensional component formed by bending a sheet metal, and a surface synthesis of each of the surface figures into a developed view without dimensional change. A temporary development view creating means for creating a temporary development view, which is a view in which correction data is given to a processing side that needs to be corrected in actual bending, for the drawn figure, and a view in which the temporary development view is corrected with the correction data And an actual development view creating means for creating an actual development view. 2. The sheet metal developed view creating apparatus according to claim 1, further comprising a provisional developed view display means for displaying the provisional developed view on a screen of a screen display means. 3. The sheet metal development according to claim 1, wherein a bend line specifying means for specifying a combined edge as a bend line when the respective surface figures are synthesized is provided in the temporary development view creating means. Drawing device.