JP3193196B2 - Automatic development drawing generation system for plate bending - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a CA for bending sheet material.
The present invention relates to an apparatus for automatically generating a development plan for a sheet metal bending process for performing a drawing process in a D / CAM or the like, and particularly to a development apparatus for automatically developing a development plan data for a sheet metal processing product such as a box-shaped body. It relates to a generating device.

[0002]

2. Description of the Related Art In the bending of a sheet metal processed product such as a box-shaped body, developed shape data indicating the material shape of the sheet material bending process, that is, developed view data, is required. The operator assumes the developed shape of the finished product from the shape of the finished product, and sets each line segment that composes the developed shape one by one with the dimensions calculated taking into account the elongation value at the time of bending processing based on this This is done by creating shape data.

[0003]

In the development of the developed view data as described above, the developed form is assumed from the shape of the finished product, and each line segment constituting the developed shape is stretched one by one by bending. The degree of dependence on the operator is high, such as calculation taking into account the values and inputting the data of each line segment one by one. This requires considerable time and effort, and further requires experience.

[0004] Further, it is not possible to confirm whether or not the developed shape assumed by the operator from the shape of the completed product is correct before machining, and it is not possible to confirm the actual shape without actually machining. Cannot be discovered in advance.

[0005] The acquisition of the developed shape data as described above can be performed by a highly experienced operator in the case of a simple box-shaped body such as a rectangular bottom, but the trapezoidal bottom may be used. When a box-shaped body is formed by compounding bending of each piece, or when a curved body is included, it is difficult to obtain the expanded shape data correctly considering the elongation value at each bending. Even a high operator has high difficulty and cannot acquire the developed shape data efficiently.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and is capable of reducing the material shape of a sheet metal processed product such as a box-shaped body without requiring complicated data input work and experience. It is an object of the present invention to provide an automatic development diagram for a plate material bending process which automatically and accurately creates the developed shape data shown.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided, in accordance with the present invention, a front cross-sectional shape and a side cross-sectional shape which share one bottom surface of a sheet metal processed product formed by bending, and dimensions thereof. A cross-sectional shape data input unit for inputting the cross-sectional shape data; and, provided with the cross-sectional shape data, extending each side of each cross-sectional shape based on the cross-sectional shape data into a rectangular shape along a plane orthogonal to the cross-section. A reference shape data generation unit that generates reference shape data indicating a reference shape formed by the obtained bottom surface and a flange surface connected to each side of the bottom surface, and the reference shape data given the reference shape data, The adjacent flange surfaces are stretched along each flange surface in a direction approaching each other so that the adjacent flange surfaces intersect each other And an interference calculation processing unit for generating the three-dimensional shape data of the sheet metal processed product as the mutual joint corner of the adjacent flange surface, and displaying the three-dimensional shape of the sheet metal processed product based on the three-dimensional shape data. A three-dimensional shape display processing unit for performing processing, and each flange surface provided with the three-dimensional shape data is rotated and moved to the same plane as the bottom surface around the bending side part based on the three-dimensional shape data, and developed to bend each bending side. In accordance with the elongation value at the time of bending in the part, the disposition position of each flange surface is translated in a direction away from the bottom surface, and the closed bottom contour and the flange surface are connected by the parallel movement to obtain a closed loop contour line. A development for plate material bending, comprising: a development view data generation section for generating development view data; and a storage device for storing the data. It is accomplished by drawing automatic generation system.

[0008] In the apparatus for automatically generating a developed view for bending a sheet material according to the present invention, the cross-sectional shape data input section includes a front cross-sectional shape and a side cross-sectional shape sharing one bottom surface, and a plurality of different cross-sectional shapes having the same dimensions. And the reference shape data generating unit is connected to the trapezoidal bottom surface and each side of the trapezoidal bottom surface based on the cross-sectional shape data including a plurality of different cross-sectional shape data in the same cross-section. It may be configured to generate reference shape data indicating a reference shape formed by the flange surface.

In the apparatus for automatically generating a developed view for bending a sheet material according to the present invention, the cross-sectional shape data input section is configured to input cross-sectional shape data for each side of the front cross-sectional shape or the side cross-sectional shape. The shape data generating unit is configured to generate reference shape data indicating a reference shape formed by each bottom surface and a flange surface connected to each side of each bottom surface, with each side to which the cross-sectional shape data is input as a bottom surface constituting side. May be.

Further, in the apparatus for automatically generating a developed view for bending a sheet material according to the present invention, the cross-sectional shape data input unit is configured to be capable of inputting data indicating a bent shape and a bent size of each bent portion, and The shape data generating unit generates reference shape data that approximates a curved surface to a plurality of flange surfaces formed by planes having different inclination angles according to the curved bending radius when the bending shape is curved bending. It may be configured.

[0011]

According to the above-described configuration, the front cross-sectional shape and the side cross-sectional shape sharing one bottom surface of the sheet metal processed product and the cross-sectional shape data indicating these dimensions are input to the cross-sectional shape data input unit. The reference shape data generation unit is configured to extend each side in each cross-sectional shape according to the cross-sectional shape data into a rectangular shape along a plane orthogonal to the cross-section and obtain a bottom surface and a flange surface connected to each side of the bottom surface. Generates reference shape data indicating the reference shape to be configured, and the interference calculation processing unit extends the flange surfaces adjacent to each other around the bottom surface in the reference shape data along each flange surface in a direction approaching each other and adjacent to each other. An interference position where the mating flange surfaces intersect with each other is determined, and the interference position is used as an interconnecting corner between adjacent flange surfaces to generate three-dimensional shape data of the sheet metal processed product. . When the three-dimensional shape data is given to the three-dimensional shape output unit, the three-dimensional shape output unit performs image display output for displaying the three-dimensional shape of the sheet metal processed product as an image.

Further, the developed shape data generation unit rotates each flange surface based on the three-dimensional shape data to the same surface as the bottom surface, and obtains an elongation value at the time of bending at each bending side where each flange surface is connected to the bottom surface. In accordance therewith, the arrangement position of each flange surface is translated in a direction away from the bottom surface, and expanded shape data based on a closed loop contour obtained by connecting the flange surfaces is generated.

Each of the above-mentioned data is stored in a storage device for temporary storage for various processing and reuse.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an embodiment of an apparatus for automatically generating a developed view for bending a sheet material according to the present invention. The apparatus for automatically generating a developed view for bending a sheet material includes a processing device main body 1, a display 3, a keyboard 5 and a mouse 7 as data input means, and storage devices 9, 11, and 13 for storing various data. I have.

In practice, the storage devices 9, 11, 13 are:
It may be configured by dividing the storage area of one storage device.

The processing apparatus body 1 includes a cross-sectional shape data input unit 15, a reference shape data generation unit 17, an interference calculation processing unit 19, a three-dimensional shape display processing unit 21, a development view data generation unit 23, a control unit 25 and a database access unit 27.

As shown in FIG. 4, the cross-sectional shape data input unit 15 is provided with a bottom surface B (FIG. 8) of one of the sheet metal products manufactured by bending as shown in FIG.
), And the cross-sectional shape data indicating the dimensions thereof are input. The front cross-sectional shape X includes sides a, b, and c, and the side cross-sectional shape Y includes sides d, b, and e.

In addition to the standard cross-sectional shape data as described above, the cross-sectional shape data input unit 17 further includes a front cross-sectional shape X and a side cross-sectional shape Y sharing one bottom surface B as illustrated in FIG. It is configured to be able to input a plurality of cross-sectional shape data different from each other for those having the same cross-section. The example shown in FIG. 5 indicates that the side cross-sectional shape data (right side in FIG. 5) and the rear side cross-sectional shape data (left side in FIG. 5) are input for the side cross section Y, respectively. ing.

As shown in FIG. 6, for each side formed by the front cross-sectional shape X or the side cross-sectional shape Y, the cross-sectional shape data of another cross-sectional shape Z by a cross-section perpendicular to the relevant side can be input. Has become. In the example shown in FIG. 6, for each of the sides a, b, and c formed by the front cross-sectional shape X, the cross-sectional shape data of another cross-sectional shape Z by a cross-section perpendicular to each of the relevant sides a, b, and c is obtained. This indicates that each has been entered.

Further, as illustrated in FIG. 7, the configuration is such that a bending shape of each bending portion such as a curved bending can be inputted.

The section shape data input by the section shape data input section 15 is stored in the storage device 9.

The reference shape data generation unit 17 is provided in the storage device 9
Given the reference cross-sectional shape data described above, FIG.
As shown in (a), each side a, b (shared by the front cross-sectional shape X and the side cross-sectional shape Y), c, d, and e in each cross-sectional shape based on the cross-sectional shape data is orthogonal to the cross-section. Shape data showing a bottom surface B obtained by extending a rectangular shape along the surface to be formed and four flange surfaces Fa, Fc, Fd, and Fe connected to each side of the bottom surface B. Generate

When the reference shape data generation unit 17 inputs cross-sectional shape data including a plurality of different cross-sectional shape data in the same cross-section, the trapezoidal bottom surface B (FIG. 1)
0) and the reference shape data indicating the reference shape constituted by the flange faces Fa, Fc, Fd, and Fe connected to the respective sides of the trapezoidal bottom surface B, and the cross-sectional shape data including other cross-sectional shapes Z Is input, each of the bottoms B, Feb,
If reference shape data indicating a reference shape composed of Fdb (see FIG. 11) and a flange surface connected to each side of each bottom surface is generated, and data indicating that the bending shape is curved bending is input. As shown in FIG. 9A, reference shape data is generated which approximates a curved surface to a plurality of flange surfaces f formed by planes having different inclination angles according to the curved bending radius dimension.

The generation of the reference shape data is automatically performed in the background, and the generated reference shape data is stored in the storage device 11 through the database access unit 27.
Is stored as a surface configuration database.

The interference calculation processing unit 19 is provided with the above-mentioned reference shape data stored in the storage device 11 through the database access unit 27, and as shown in FIG. The flange surfaces Fa, Fc, Fd, and Fe adjacent to each other around the flanges F, Fc, F in a direction approaching each other (in the direction of the arrow).
d, Flange surfaces F extending along Fe and adjacent to each other
a, Fc, Fd, and Fe, determine interference positions where they intersect with each other, and determine the interference positions with adjacent flange surfaces Fa, Fc, and F.
d, The three-dimensional shape data of the sheet metal processed product is generated as the mutual junction corner j of Fe.

The three-dimensional shape display processing unit 21 inputs the three-dimensional shape data generated by the interference calculation processing unit 19 through the database access unit 27, and performs a display process for displaying the three-dimensional shape of the sheet metal processed product based on the three-dimensional shape data. And outputs a display signal to the display 3.

As a result, the display 3 three-dimensionally displays the three-dimensional shape of the sheet metal processed product, that is, the shape of the finished product as shown in FIG. The three-dimensional display of the shape of the finished product allows the operator to reliably and easily confirm the shape of the finished product.

FIG. 9B shows an example of a three-dimensional display of a sheet metal processed product in the case where there is a curved bending as in the case of inputting the sectional shape data shown in FIG. 7, and FIG. 10 shows the sectional view shown in FIG. FIG. 11 shows an example of a three-dimensional display of a sheet metal processed product in a case where there are a plurality of cross-sectional shape data different from each other for the same cross-section as in the case of inputting the shape data. , Three-dimensional display examples of sheet metal processed products based on cross-sectional shape data including other cross-sectional shapes Z.

The developed view data generating section 23 is supplied with the three-dimensional shape data generated by the interference calculation processing section 19 through the database access section 27, and basically, firstly, FIG.
As shown in FIG. 2 (a), each of the flange surfaces Fa, Fc, Fd, and Fe based on the above-described three-dimensional shape data is rotated and moved around the bending side m to the same surface as the bottom surface B. Then, as shown in FIG. 12B, each flange face Fa, according to the elongation value at the time of bending at each bending side m, which is input or calculated in advance, as shown in FIG.
The arrangement positions of Fc, Fd, and Fe are translated in a direction away from the bottom surface B, and the bottom surface and the flange surface are separated by a line segment n as shown in FIG.
To generate unfolded view data based on a closed loop contour S obtained by eliminating unnecessary lines corresponding to bent lines between the surfaces.

The developed view data is stored in the storage device 13 and is used for preparing bending data of the NC automatic bending apparatus and processing data of the bending material.

When there is a curved bend, the developed view data generating unit 23 treats the flange surface f, which approximates the curved surface, in the same manner as the flange surfaces Fa, Fc, Fd, and Fe. ), The respective flange surfaces f, Fa, Fc, Fd, and Fe are rotated and moved around the respective bent side portions m to the same surface as the bottom surface B, and then developed. As shown in FIG. 13 (b), the flange surfaces f, Fa, Fc,
The arrangement positions of Fd and Fe are respectively translated in a direction away from the bottom surface B, and as shown in FIG. 13C, the bottom surface and the flange surface separated by the translation are connected to each other by a line segment. Unfolded view data based on a closed loop contour S obtained by eliminating unnecessary lines corresponding to the bending lines between the surfaces is generated.

FIG. 14 is a developed view based on the sectional shape data as shown in FIG. 5, and FIG. 15 is a developed view based on the sectional shape data as shown in FIG. .

FIG. 2 shows a basic processing operation procedure of the apparatus for automatically generating a developed view for bending sheet material according to the present invention, which comprises a step 1 for inputting cross-sectional shape data of a product, and a step 1 for inputting the cross-sectional shape data. Step 2 of generating the above-described reference shape data, Step 3 of generating the three-dimensional shape data of the sheet metal processed product by elongating each flange surface and calculating the interference position between the flange surfaces using the reference shape data, and The method includes a step 4 for displaying a three-dimensional shape and confirming it by an operator, and a step 5 for generating development view data from the above-mentioned three-dimensional shape data.

Next, the procedure for inputting the cross-sectional shape data of the product in step 1 described above will be described with reference to FIG.

First, in step 11, the shape X of the front cross section is
Is input using the mouse 7 or the like. Next, step 1
In step 2, the user selects whether or not to perform a curved bending with the front cross-sectional shape X (hereinafter, the curved bending is referred to as a bending R).
Next, in step 14, each side a, b, c of the front cross-sectional shape X
Is input from the keyboard 5. Then, in step 15, the elongation value at each bending position is input from the keyboard 5. At this time, a standard elongation value is displayed on the display 3 as a default value, and the operator can freely select whether to adopt this standard elongation value or to input another arbitrary elongation value.

Next, in step 16, the presence or absence of the bend R is determined. If there is a bend R, the radius of the bend R is input from the keyboard 5 in step 17. This completes the input of the front sectional shape data.

Next, in step 18, it is determined whether or not the size of the side cross-sectional shape is different between the front side and the back side and between the right side and the left side when viewed from the front cross section. Is input from the keyboard 5 in step 19.

In step 20, the shape Y of the side cross section is input using the mouse 7 or the like. Next, in step 21, a choice is made as to whether or not to perform the bend R with this side cross-sectional shape Y. If the bend R is to be performed, that part is designated in step 22. Next, in step 23, the dimension values of the sides d, b, and e of the side sectional shape X are input from the keyboard 5. Then, in step 24, the elongation value at each bending position is input from the keyboard 5. Also at this time, a standard elongation value is displayed on the display 3 as a default value, and the operator can freely select whether to adopt this standard elongation value or to input another arbitrary elongation value.

Next, at step 25, the presence or absence of the bend R is determined. If there is a bend R, the radius of the bend R is inputted from the keyboard 5 at step 26.

Next, at step 27, it is determined whether or not the size of the side cross-sectional shape is different between the front side and the back side. If the size is different, at step 28, the size of the back side cross-sectional shape is determined. The dimensions are entered from the keyboard 5 and, in step 29, which side of the front cross section the side cross section is to be designated. This designation can also designate two or more sides. Thus, the input of one side sectional shape data is completed.

Thereafter, the flow advances to step 30, where it is determined whether or not there is a side cross section having a shape different from the input side cross section. If there is, the steps 20 to 29 are repeated. Complete initial input of shape data. The input cross-sectional shape data is stored in the storage device 9.

When the input of the sectional shape data as described above is completed, the above-described steps 2 to 5 are sequentially executed.

In each of the embodiments described above, the sheet metal processed product is described as a box-shaped body. However, if the input cross section is made one, it can be applied to a channel material, an angle material and the like by sheet metal processing. Needless to say.

In the above, the present invention has been described in detail with reference to specific embodiments. However, the present invention is not limited to these embodiments, and various embodiments are possible within the scope of the present invention. Some will be apparent to those skilled in the art.

[0046]

As will be understood from the above description, according to the apparatus for automatically generating a developed view for bending a sheet material according to the present invention, only the cross-sectional shape data of the sheet metal processed product is input, and the operator's work is troublesome. Since the three-dimensional shape of the finished product is displayed on the screen and the development data is automatically generated, the operator can visually recognize the three-dimensional shape screen display of the finished product so that input errors can be found without trial bending work etc. In advance, it will be done easily and reliably,
Also, there is no need to create the development data manually,
The efficiency of development view data creation work is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of an apparatus for automatically generating a developed view for bending a sheet material according to the present invention.

FIG. 2 is a flow chart showing a basic processing operation procedure of the automatic development view for sheet material bending processing according to the present invention.

FIG. 3 is a flowchart showing a procedure for inputting cross-sectional shape data of a product in the apparatus for automatically generating a developed view for bending sheet material according to the present invention.

FIG. 4 is an explanatory diagram showing an example of inputting cross-sectional shape data of a product.

FIG. 5 is an explanatory diagram showing an example of inputting cross-sectional shape data of a product.

FIG. 6 is an explanatory diagram showing an example of inputting cross-sectional shape data of a product.

FIG. 7 is an explanatory diagram showing an example of inputting cross-sectional shape data of a product.

8 (a) to 8 (c) are explanatory views showing a process of generating three-dimensional shape data in an automatic development view generating apparatus for bending sheet material according to the present invention.

FIGS. 9A and 9B are explanatory views showing another example of a process of generating three-dimensional shape data in the apparatus for automatically generating a developed view for bending sheet material according to the present invention.

FIG. 10 is an explanatory diagram showing an example of displaying a three-dimensional shape based on three-dimensional shape data generated by the apparatus for automatically generating a developed view for bending a sheet material according to the present invention.

FIG. 11 is an explanatory diagram showing a display example of a three-dimensional shape based on three-dimensional shape data generated by the apparatus for automatically generating a developed view for bending a sheet material according to the present invention.

12 (a) to 12 (c) are explanatory diagrams showing a development view data generation process in the development apparatus for automatically developing a development view for sheet bending according to the present invention.

13 (a) to 13 (c) are explanatory views showing another example of the development view data generation process in the automatic development view development apparatus for bending sheet material according to the present invention.

FIG. 14 is an explanatory diagram showing an example of a developed view based on developed view data generated by the apparatus for automatically generating a developed view for bending a sheet material according to the present invention.

FIG. 15 is an explanatory view showing an example of a developed view based on developed view data generated by the automatic developed view development apparatus for bending sheet material according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing apparatus main body 3 Display 5 Keyboard 7 Mouse 15 Sectional shape data input unit 17 Reference shape data generation unit 19 Interference calculation processing unit 21 Solid shape display processing unit 23 Development view data generation unit

Claims (4)

(57) [Claims] 1. A cross-sectional shape data input unit for inputting a front cross-sectional shape and a side cross-sectional shape sharing one bottom surface of a sheet metal processed product created by bending and a cross-sectional shape data indicating these dimensions, Given data, a bottom surface obtained by extending each side in each cross-sectional shape according to the cross-sectional shape data into a rectangular shape along a plane orthogonal to the cross-section, and a flange surface connected to each side of the bottom surface A reference shape data generation unit that generates reference shape data indicating a reference shape configured by: a reference shape data, and in the reference shape data, a direction in which flange surfaces adjacent to each other around a bottom surface approach each other in the reference shape data. An interference position where the flange surfaces adjacent to each other intersect with each other by extending along each flange surface is determined, and the interference position is determined by the adjacent flange surface. An interference calculation processing unit that generates three-dimensional shape data of the sheet metal processed product as an interconnecting corner; a three-dimensional shape display processing unit that performs a display process for displaying a three-dimensional shape of the sheet metal processed product based on the three-dimensional shape data; Given the shape data, rotate each flange surface based on the three-dimensional shape data to the same plane as the bottom surface around the bending side and expand it, and elongation value at the time of bending at each bending side In parallel with the arrangement position of each flange surface in a direction away from the bottom surface in accordance with, and develop the development data by the closed loop contour obtained by connecting the bottom surface and the flange surface separated by the translation. An automatic development view for plate material bending processing, comprising: a generation unit; and a storage device for storing the data. 2. A cross-sectional shape data input unit is configured to be able to input a plurality of cross-sectional shape data different from each other for a front cross-sectional shape and a side cross-sectional shape sharing one bottom surface and those having the same cross-section. The reference shape data generation unit is configured to generate a reference shape data indicating a reference shape including a trapezoidal bottom surface and a flange surface connected to each side of the trapezoidal bottom surface based on the cross-sectional shape data including a plurality of different cross-sectional shape data in the same cross-section. 2. The automatic drawing apparatus for automatically generating a developed view for bending a plate material according to claim 1, wherein the automatic drawing apparatus is configured to generate a drawing. 3. A cross-sectional shape data input unit is configured to be capable of inputting cross-sectional shape data for each side formed by a front cross-sectional shape or a side cross-sectional shape, and the reference shape data generating unit is configured to input each cross-sectional shape data. 3. A reference shape data indicative of a reference shape constituted by each bottom surface and a flange surface connected to each side of each bottom surface with a bottom surface constituting a side, and wherein the reference shape data is generated.
The automatic development device for the development of the development of the plate material according to the above. 4. A section shape data input section is configured to be capable of inputting data indicating a bending shape and a bending dimension of each bending section, and the reference shape data generating section is configured so that the bending shape is a curved bending. Wherein reference shape data which approximates a curved surface to a plurality of flange surfaces formed by planes having different inclination angles in accordance with the curved bending radius dimension is generated.
3. The apparatus for automatically generating a developed view for bending a sheet material according to any one of 3.