JPH0729035A - Automatic generation device of development drawing for plate bending work - Google Patents

Abstract

PURPOSE:To automatically and precisely generate development shape data showing the material shape of drawing product such as a box formed unit without the need of troublesome data input work and an experiential degree. CONSTITUTION:A section shape data input part 15 inputting section shape data of the drawing product, and a reference shape data generation part 17 generating reference shape data showing a reference shape consisting of a bottom surface and frange surfaces connected to the respective sides of the bottom surface by section shape data are provided. Furthermore, an interference calculation processing part 19 generating cubic shape data of the drawing product from reference shape data, a cubic shape display processing part 21 executing a display processing for displaying the cubic shape of the drawing product by cubic shape data and a development drawing data generation part 23 generating development drawing data by a closed loop outline by which an expanding value at the time of bending work is considered in respective bending work side parts by cubic shape data are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CA for plate bending.
An automatic development drawing for plate bending that performs drawing processing in D / CAM etc., especially an automatic expansion drawing for plate bending that automatically generates development data showing the material shape of sheet metal processing products such as boxes The present invention relates to a generator.

[0002]

2. Description of the Related Art In plate bending of a sheet metal product such as a box-shaped product, expanded shape data indicating the material shape of the plate bending process, that is, expanded view data is required. The operator assumes the developed shape of the finished product rather than the shape of the finished product, and based on this, each line segment that constitutes the developed shape is set one by one with the dimension calculated considering the elongation value during bending. This is done by creating shape data.

[0003]

In the development data development as described above, the development shape of the finished product is assumed from the shape of the finished product, and each line segment constituting the development shape is stretched one by one during bending. There is a high degree of dependence on the operator, such as calculation considering the value and inputting the data of each line segment one by one. This requires a considerable amount of time and labor and further requires experience.

Further, it is not possible to confirm whether or not the developed shape assumed by the operator based on the shape of the finished product is correct before processing, and it cannot be confirmed without actual processing. It cannot be discovered in advance.

In the case of a simple box-shaped body such as a rectangular bottom surface, acquisition of the expanded shape data as described above is possible even if the operator has a high degree of experience, but the bottom surface has a trapezoidal shape. If a box-shaped body is constructed by compounding bending work of each piece, or if bending work is included, it is not necessary to correctly acquire the developed shape data considering the elongation value at each bending work. Even a high operator has high difficulty and cannot efficiently obtain the expanded shape data.

The present invention has been made by paying attention to the conventional problems as described above, and it is possible to determine a material shape of a sheet metal product such as a box-shaped product without requiring a troublesome data input work and experience. It is an object of the present invention to provide an automatic development drawing generation device for bending a plate material, which automatically and accurately creates the developed shape data shown.

[0007]

According to the present invention, the above-mentioned objects indicate a front cross-sectional shape and a side cross-sectional shape that share one bottom surface of a sheet metal product manufactured by bending, and their dimensions. By inputting the cross-sectional shape data inputting the cross-sectional shape data and extending each side in each cross-sectional shape given 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 configured by the obtained bottom surface and flange surfaces connected to each side of the bottom surface, and the reference shape data given the reference shape data Interference between adjacent flange surfaces that are extended by extending the adjacent flange surfaces along each flange surface in the direction of approaching each other. Position and the interference calculation position as the mutual joining corner of the adjacent flange surfaces to generate three-dimensional shape data of the sheet metal processed product, and a display for 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 that performs processing, and given each of the three-dimensional shape data, rotate each flange surface based on the three-dimensional shape data to the same surface as the bottom surface around the bending side and expand it to expand each bending side. By the closed loop contour line obtained by translating the arrangement position of each flange surface in the direction away from the bottom surface according to the elongation value at the time of bending in the part and connecting the bottom surface and the flange surface separated by the parallel movement. A plate bending work exhibiting a development data generating unit for generating development data and a storage device for storing each of the data. It is accomplished by drawing automatic generation system.

In the automatic expansion drawing generating apparatus for plate bending according to the present invention, the cross-sectional shape data input section has a plurality of different front cross-sectional shapes and side cross-sectional shapes sharing one bottom surface and those having the same cross section. The reference shape data generator is connected to the trapezoidal bottom surface and each side of the trapezoidal bottom surface based on the sectional shape data including a plurality of different 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.

Further, in the automatic development device for plate material bending processing according to the present invention, the cross-sectional shape data input unit is configured to be able to input cross-sectional shape data for each side formed by the front cross-sectional shape or the side cross-sectional shape, and the reference The shape data generation unit is configured to generate reference shape data indicating a reference shape constituted by each bottom surface and a flange surface connected to each side of each bottom surface, with each side into which the cross-sectional shape data is input as a bottom surface constituting side. You can stay.

Further, in the automatic development apparatus for bending a plate material according to the present invention, the sectional shape data input unit is configured to be able to input data indicating a bending shape and a bending dimension of each bending section, When the bending shape is curved bending, the shape data generation unit generates reference shape data that approximates the curved surface by a plurality of flange surfaces formed by planes having different inclination angles according to the bending radius dimension. It may be configured.

[0011]

According to the above-mentioned structure, the cross-sectional shape data indicating the front cross-sectional shape and the side cross-sectional shape that share one bottom surface of the sheet metal product and the dimensions thereof are input to the cross-sectional shape data input section. By the bottom surface obtained by the reference shape data generation unit extending each side in each cross-sectional shape according to the cross-sectional shape data into a rectangular shape along the plane orthogonal to the cross section and the flange surface connected to each side of the bottom surface. The reference shape data indicating the configured reference shape is generated, and the interference calculation processing unit extends the adjacent flange surfaces around the bottom surface in the reference shape data in the directions toward each other so as to extend along the respective flange surfaces to be adjacent to each other. Obtain the interference position where the mating flange surfaces intersect with each other, and use this interference position as the mutual joint corner of the adjacent flange surfaces to generate the three-dimensional shape data of the sheet metal product. . By giving this three-dimensional shape data to the three-dimensional shape output section, the three-dimensional shape output section performs image display output for displaying the three-dimensional shape of the sheet metal product as an image.

In addition, the expanded shape data generation unit rotationally moves each flange surface based on the three-dimensional shape data to the same surface as the bottom surface, and determines the elongation value at the time of bending at each bending side where each flange surface is connected to the bottom surface. Accordingly, the arrangement position of each flange surface is translated in a direction away from the bottom surface, and developed shape data based on a closed loop contour line obtained by connecting the flange surfaces to each other is generated.

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

[0014]

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

FIG. 1 shows an embodiment of an automatic development drawing generation apparatus for bending a plate material according to the present invention. The automatic development device for plate material bending processing comprises a processing device body 1, a display 3, a keyboard 5 and a mouse 7 as data input means, and storage devices 9, 11, 13 for storing various data. There is.

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

The processing apparatus main 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, and a control unit. 25 and a database access unit 27.

The cross-sectional shape data input unit 15 is a bottom surface B (FIG. 8) of a sheet metal product manufactured by bending as shown in FIG. 4 by the keyboard 5 and the mouse 7.
The front sectional shape X, the side sectional shape Y, and the sectional shape data indicating these dimensions 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 above-described standard cross-sectional shape data, the cross-sectional shape data input unit 17 has a front cross-sectional shape X and a side cross-sectional shape Y which share one bottom surface B, as illustrated in FIG. It is configured so that a plurality of cross-sectional shape data different from each other for those having the same cross section can be input. In the example shown in FIG. 5, it is shown that, for the side cross section Y, the front side cross section shape data (right side in FIG. 5) and the back side cross section shape data (left side in FIG. 5) are respectively input. ing.

Further, as illustrated in FIG. 6, for each side formed by the front cross-sectional shape X or the side cross-sectional shape Y, cross-sectional shape data of another cross-sectional shape Z having a cross section perpendicular to the corresponding side can be input. Has become. In the example shown in FIG. 6, for each side a, b, c formed by the front cross-sectional shape X, cross-sectional shape data of another cross-sectional shape Z by a cross section perpendicular to each of the corresponding sides a, b, c is obtained. It shows that each input.

Further, as illustrated in FIG. 7, the bending shape of each bending portion, such as bending, can be inputted.

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

The reference shape data generation unit 17 includes a storage device 9
Given the above-mentioned standard cross-sectional shape data, 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, e in each cross-sectional shape based on the cross-sectional shape data is orthogonal to the cross section. Reference shape data indicating a reference shape formed by a bottom surface B obtained by extending a rectangular shape along the surface to be formed and four flange surfaces Fa, Fc, Fd, Fe connected to each side of the bottom surface B. To generate.

Further, when the reference shape data generator 17 inputs the sectional shape data including a plurality of different sectional shape data in the same section, the trapezoidal bottom surface B (FIG. 1).
0)) and reference shape data indicating a reference shape formed by the flange surfaces Fa, Fc, Fd, and Fe connected to each side of the trapezoidal bottom surface B, and sectional shape data including other sectional shapes Z. In the case of inputting each of the bottom surfaces B, Feb, and
When the reference shape data indicating the reference shape configured by Fdb (see FIG. 11) and the flange surface connected to each side of each bottom surface is generated, and the data that the bending shape is the curved bending is input, As shown in FIG. 9A, reference shape data for approximating the curved surface by a plurality of flange surfaces f formed by planes having different inclination angles is generated according to the curved bending radius dimension.

All the reference shape data is automatically generated in the background, and the generated reference shape data is stored in the storage device 11 through the database access unit 27.
Stored as a surface configuration database.

The interference calculation processing section 19 is given the above-mentioned reference shape data stored in the storage device 11 through the database access section 27, and as shown in FIG. Flanges Fa, Fc, Fd, Fe that are adjacent to each other in the direction of the arrow F, Fc, F
Flange faces F that are adjacent to each other by extending along d and Fe
The interference position where a, Fc, Fd, and Fe intersect with each other is obtained, and the interference position is determined by the adjacent flange surfaces Fa, Fc, and F.
The three-dimensional shape data of the sheet metal product is generated as the mutual joint corner j of d and 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 displays the three-dimensional shape of the sheet metal product by the three-dimensional shape data. Then, the display signal is output to the display 3.

As a result, the display 3 three-dimensionally displays the three-dimensional shape of the sheet metal processed product as shown in FIG. 8C, that is, the shape of the finished product. The three-dimensional display of the shape of the finished product allows the operator to confirm the shape of the finished product reliably and easily.

FIG. 9 (b) shows an example of a three-dimensional display of a sheet-metal processed product in the case where there is curved bending as in the case of inputting the cross-sectional shape data shown in FIG. 7, and FIG. 10 shows the cross section shown in FIG. As in the case of inputting the shape data, as shown in FIG. , Three-dimensional display examples of the sheet metal processed product in the case of the cross-sectional shape data including other cross-sectional shapes Z are shown.

The exploded view data generation unit 23 is given the solid shape data generated by the interference calculation processing unit 19 through the database access unit 27. Basically, first, FIG.
As shown in FIG. 2 (a), the respective flange surfaces Fa, Fc, Fd, Fe based on the above-mentioned three-dimensional shape data are rotationally moved to the same surface as the bottom surface B around each bending side part m. Then, as shown in FIG. 12 (b), each flange surface Fa, according to the elongation value during bending at each bending side portion m that is input or internally calculated in advance, as shown in FIG.
The arrangement positions of Fc, Fd, and Fe are moved in parallel in the direction away from the bottom surface B, and as shown in FIG.
And the development drawing data by the closed loop contour line S obtained by erasing unnecessary lines corresponding to the bending lines between the respective surfaces are generated.

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

In the case where there is a curved bend, the developed view data generation unit 23 handles the flange surface f that approximates the curved surface in the same manner as the flange surfaces Fa, Fc, Fd, Fe, and FIG. ), The respective flange surfaces f, Fa, Fc, Fd, Fe are rotationally moved to the same surface as the bottom surface B about the respective bending side portions m, and are then developed. As shown in FIG. 13 (b), the flange surfaces f, Fa, Fc,
The positions of Fd and Fe are moved in parallel in the direction away from the bottom surface B, and as shown in FIG. 13C, the bottom surface and the flange surface separated by the parallel movement are connected to each other by a line segment, Development data of a closed-loop contour line S obtained by deleting unnecessary lines corresponding to the bending lines between the surfaces is generated.

FIG. 14 shows a developed view in the case of the sectional shape data as shown in FIG. 5, and FIG. 15 shows a developed view in the case of the sectional shape data as shown in FIG. .

FIG. 2 shows a basic processing operation procedure of the automatic development device for plate material bending processing according to the present invention, which is step 1 for inputting the sectional shape data of the product, and then this sectional shape data. From the step 2 of generating the above-mentioned reference shape data, the step 3 of generating the three-dimensional shape data of the sheet metal processed product by the extension of each flange surface by the reference shape data and the calculation of the interference position between the flange surfaces, and the three-dimensional shape data. It includes step 4 for displaying the three-dimensional shape and confirming it by the operator, and step 5 for generating development drawing data from the above-mentioned three-dimensional shape data.

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

First, in step 11, the front cross-sectional shape X
Is input using the mouse 7 or the like. Next, step 1
At 2, the bending of the front cross-sectional shape X (hereinafter, bending is referred to as bending R) is selected, and when the bending R is performed, the portion is designated at step 13.
Next, at step 14, each side a, b, c of the front sectional shape X
The dimension value of 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, the standard extension value is displayed on the display 3 as the default value, and the operator can freely select whether to adopt the standard extension value or to input another arbitrary extension value.

Next, in step 16, it is judged whether or not there is a bend R. If there is a bend R, the radius of the bend R is entered from the keyboard 5 in step 17. This completes the front cross-sectional shape data input.

Next, at step 18, it is selected whether the side cross-sectional shape dimensions are different between the front side and the back side, or the right side and the left side when viewed from the front section. If they are different, the back side dimension is selected. 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, whether or not the bending R is performed on the side cross-sectional shape Y is selected, and when the bending R is performed, the portion 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, the standard elongation value is displayed on the display 3 as the default value, and the operator can freely select whether to adopt the standard elongation value or input another arbitrary elongation value.

Next, in step 25, it is judged whether or not there is a bend R, and if there is a bend R, the radius of the bend R is entered from the keyboard 5 in step 26.

Next, at step 27, it is judged whether or not the dimensions of the side cross-sectional shapes of the front side and the back side are different, and if they are different, at step 28, the depth of the side surface cross-sectional shape is determined. The size is input from the keyboard 5, and in step 29, the side of the front section to which this side section is attached is designated. This designation can also designate two or more sides. This completes the input of one side cross-sectional shape data.

After that, the process proceeds to step 30, and it is selected whether or not there is a side cross-section having a shape different from the input side cross-section, and if there is this, steps 20 to 29 are repeated. Complete the initial input of shape data. The input cross-sectional shape data is stored in the storage device 9.

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

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

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

[0046]

As can be understood from the above description, according to the automatic expansion drawing generation device for sheet metal bending processing of the present invention, only the cross-sectional shape data of the sheet metal product is input, and the operator's hand is troubled. Since the three-dimensional shape of the finished product is displayed on the screen and the development drawing data is automatically generated, the operator visually recognizes the three-dimensional shape display of the finished product to find input mistakes without trial bending. It will be done in advance easily and reliably,
Also, there is no need to manually create the exploded view data,
The efficiency of development drawing data creation work is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an automatic development drawing generation device for plate bending according to the present invention.

FIG. 2 is a flow chart showing a basic processing operation procedure of a development drawing automatic generation device for plate bending according to the present invention.

FIG. 3 is a flow chart showing a procedure of inputting cross-sectional shape data of a product in the development drawing automatic generation device for plate bending 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 three-dimensional shape data generation process in the automatic development device for plate material bending processing according to the present invention.

9 (a) and 9 (b) are explanatory views showing another example of the three-dimensional shape data generation process in the automatic expansion drawing generation device for plate material bending processing according to the present invention.

FIG. 10 is an explanatory diagram showing a three-dimensional shape display example based on three-dimensional shape data generated by a plate material bending development development device according to the present invention.

FIG. 11 is an explanatory diagram showing a three-dimensional shape display example based on three-dimensional shape data generated by a plate material bending process development drawing automatic generation device according to the present invention.

12A to 12C are explanatory views showing a development view data generation process in the development development automatic generation apparatus for plate bending according to the present invention.

13A to 13C are explanatory views showing another example of a development view data generation process in the development development automatic generation device for plate bending according to the present invention.

FIG. 14 is an explanatory diagram showing an example of a development view based on the development view data generated by the automatic expansion view generation device for plate bending according to the present invention.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing device main body 3 Display 5 Keyboard 7 Mouse 15 Cross-sectional shape data input part 17 Reference shape data generation part 19 Interference calculation processing part 21 Three-dimensional shape display processing part 23 Development drawing data generation part

Claims (4)

[Claims] 1. A cross-sectional shape data input unit for inputting front cross-sectional shapes and side cross-sectional shapes sharing one bottom surface of a sheet metal product produced by bending and cross-sectional shape data indicating these dimensions, and the cross-sectional shape. Given the data, the bottom surface obtained by extending each side in each cross-sectional shape according to the cross-sectional shape data into a rectangular shape along the plane orthogonal to the cross section and the 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, and the reference shape data is given, and the adjacent flange surfaces around the bottom surface of the reference shape data in the direction of approaching each other. Extend along each flange surface to find the interference position where adjacent flange surfaces intersect with each other, and set the interference position to the adjacent flange surface. An interference calculation processing unit that generates three-dimensional shape data of a sheet metal processed product as a mutual joint corner, a three-dimensional shape display processing unit that performs display processing for displaying the three-dimensional shape of the sheet metal processed product based on the three-dimensional shape data, Given the shape data, expand and rotate each flange surface based on the three-dimensional shape data by rotating it to the same surface as the bottom surface around the bending side part as the center, and the elongation value at the bending side at each bending side part According to the above, the layout position of each flange surface is moved in parallel in the direction away from the bottom surface, and the development surface data is generated by the closed loop contour line obtained by connecting the bottom surface and the flange surface separated by the parallel movement. An automatic development drawing generation device for plate material bending, comprising: a generation unit; and a storage device that stores the respective data. 2. The 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 generates reference shape data indicating a reference shape composed of a trapezoidal bottom surface and a flange surface connected to each side of the trapezoidal bottom surface from the sectional shape data including a plurality of different sectional shape data in the same section. The automatic development device for a development drawing for plate material bending according to claim 1, wherein the automatic drawing device is configured to generate. 3. The cross-sectional shape data input unit is configured to be able to input cross-sectional shape data for each side formed by the front cross-sectional shape or the side cross-sectional shape, and the reference shape data generation unit is for each side to which the cross-sectional shape data is input. The reference shape data indicating a reference shape constituted by each bottom surface and a flange surface connected to each side of each bottom surface is configured to generate reference shape data.
An automatic development drawing generation device for plate bending as described in. 4. The cross-section shape data input unit is configured to be able to input data indicating a bending shape and a bending dimension of each bending section, and the reference shape data generating section is a case where the bending shape is a curved bend. The reference shape data for approximating the curved surface by a plurality of flange surfaces formed by planes having different inclination angles is formed according to the curved bending radius dimension.
The automatic development device for plate material bending processing according to any one of 3).