JP2015005021A - Design method of workpiece support, design support device, and design support program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a design method of a workpiece support which is capable of designing a workpiece support used in manufacturing a product, which is obtained by unifying workpieces being a plurality of plate-like members, more easily without an error.SOLUTION: A design method of a workpiece support includes: a workpiece support modeling step for transporting a box-shaped object having a bottom part (21a1) and side plates (21a2 to 21a5) erected from edge portions of the object into a three-dimensional model as a workpiece support; a display step for simultaneously displaying a three-dimensional model of a product (SH) and a three-dimensional model of the workpiece support (21) on a display section (5); an arranging step for adjusting and virtually arranging a relative posture, a relative position, or a size such that the workpiece support (21) is made become capable of supporting plate-like members (11 to 13) receiving their own self weight on a screen of the display section, interferes with the side plates (21a2 to 21a5) in a plurality of areas and does not interfere with the bottom part (21a1); and a cutout part setting step for making the areas interfered with the workpieces (11 to 13) in the side plates (21a2 to 21a5) become cutout parts (K1 to K6).

Description

  The present invention relates to a workpiece support design method, a design support apparatus, and a design support program. In particular, in the manufacture of a product obtained by integrating a plurality of plate-like members as workpieces, and integrating them by processing such as welding, in order to design a workpiece support tool that supports the workpiece by the integration work The present invention relates to a preferred workpiece support design method, design support apparatus, and design support program.

When a workpiece is processed, it is common to improve the processing accuracy and processing efficiency by supporting the workpiece with a support tool adapted to the shape of the workpiece.
Patent Document 1 describes an example of a technique for designing a support (welding jig) that supports a workpiece to be welded using a three-dimensional CAD apparatus.

JP 2002-153993 A

Designing a support that supports a workpiece using a design support apparatus such as a three-dimensional CAD apparatus is generally performed as disclosed in Patent Document 1.
However, the design method using the conventional design support apparatus is a method of using a support tool for supporting a workpiece in a work site where a variety of welding tools are used to perform advanced welding on a workpiece having a complicated shape. However, the emphasis was placed on supporting a highly difficult design work, which is designed so as not to interfere with the three-dimensional trajectory related to the operation of various welding instruments.
Therefore, since a high-performance three-dimensional CAD device capable of high-speed arithmetic processing is required as a design support device, capital investment increases, and programs for operating the three-dimensional CAD device tend to be large and expensive. There is.

A small-scale metal processing company often manufactures a product having a simple structure obtained by processing such as welding, and more specifically, a product obtained only by integrating a plurality of plate-like members.
In this case, hardware and software that support the above-described highly difficult support design work are not necessarily required.
Also, as for capital investment, it is not easy to introduce expensive computers and programs.
Therefore, the support design is generally performed manually by a skilled designer.
However, the design that performs all the work manually involves a lot of room for human error, and it is difficult to reduce the design man-hours. Therefore, the support used for the manufacture of products obtained by integrating multiple plate members is used. It is desired that the tool can be designed more easily without mistakes.

  Therefore, the problem to be solved by the present invention is to design a workpiece support used for manufacturing a product obtained by integrating a plurality of workpieces that are plate-shaped members. The object is to provide a work support design method, a design support device, and a design support program.

In order to solve the above problems, the present invention has the following procedure and configuration.
1) Design the workpiece support (21) to be used when forming a three-dimensional product (SH) by combining a plurality of plate-like workpieces (11 to 14) using a three-dimensional CAD device. A method for designing a workpiece support,
A box-shaped object having a bottom part (21a1) and side plates (21a2 to 21a5) raised from the edge of the bottom part (21a1) and opened on one side is modeled as a workpiece support for three-dimensional modeling. A workpiece support modeling step;
A display step of simultaneously displaying the three-dimensional model of the product (SH) and the three-dimensional model of the workpiece support (21) on the display unit (5);
On the screen of the display unit (5), the workpiece support (21) can be supported by receiving the weight of each of the plate members (11-13), and the side plates (21a2-21a5) A placement step of virtually arranging the relative position, the relative position, or the size so as to interfere with a plurality of parts and non-interference with the bottom (21a1),
Notch part setting step in which the part (21a2 to 21a5) of the side plate (21a2 to 21a5) interfered with the notch part (K1 to K6),
Is a method for designing a workpiece support.
2) The workpiece support (21) is formed by bending a plate-like member (21t),
It includes a plate cutting step of cutting the workpiece (11-14) and a plate-like member for forming the workpiece support (21) into a single plate material (22). 1) The method for designing a workpiece support according to 1).
3) When the workpiece support (21) is in a posture in which the bottom (21a1) is horizontal, at least one of the notches (K1 to K6) and the workpiece (11 to 13) Is in contact with the workpiece (11-13) by its own weight, either the notch (K1-K6) or the workpiece (11-13) is inclined with respect to the horizontal. A method for designing a workpiece support according to 1) or 2) above.
4) Workpiece support according to any one of 1) to 3), wherein in the formation of the product (SH), welding is included in the combination of the plurality of work pieces (11 to 14). Tool design method.
5) Workpiece support tool that supports the design of the work piece support tool (21) used when a plurality of plate-shaped work pieces (11 to 14) are combined to form a three-dimensional product (SH). Design support device,
Equipped with a control unit (1) to demonstrate the functions of a 3D CAD device,
The control unit (1)
A three-dimensional model using a box-shaped object having a bottom part (21a1) and side plates (21a2 to 21a5) raised from the edge of the bottom part (21a1) and opened on one side as a workpiece support (21) And simultaneously displaying the three-dimensional model of the product (SH) and the three-dimensional model of the workpiece support (21) on the display unit (5),
A workpiece support design, wherein the side plate (21a2 to 21a5) is configured to set a portion where the workpiece (11 to 13) interferes with the notch (K1 to K6). Support device (S).
6) A workpiece support (21) used when forming a three-dimensional product (SH) by combining a plurality of plate-like workpieces (11 to 14) is designed using a three-dimensional CAD device. A workpiece support design design program applied at the time,
Computer (C)
A three-dimensional model using a box-shaped object having a bottom part (21a1) and side plates (21a2 to 21a5) raised from the edge of the bottom part (21a1) and opened on one side as a workpiece support (21) Workpiece support modeling step to be converted,
A display step of simultaneously displaying the three-dimensional model of the product (SH) and the three-dimensional model of the workpiece support (21) on the display unit (5);
On the screen of the display unit (5), the workpiece support (21) can be supported by receiving the weight of each of the plate members (11-13), and the side plates (21a2-21a5) A placement step of virtually arranging the relative position, the relative position, or the size so as to interfere with a plurality of parts and non-interference with the bottom (21a1),
A notch setting step in which the work piece (11-13) in the side plate (21a2-21a5) interferes with the notch (K1-K6),
Is a workpiece support design support program (PGM) characterized by

  According to the present invention, it is possible to obtain an effect that a workpiece support used for manufacturing a product obtained by integrating a plurality of workpieces that are plate-like members can be designed more easily without mistakes.

It is a block diagram for demonstrating the computer C which is an Example of the design support apparatus of the workpiece support tool which concerns on embodiment of this invention. It is an expanded view for demonstrating the to-be-processed objects 11-14 in the pattern A of design. It is a perspective view which shows product SH which integrated the to-be-processed objects 11-14. It is a figure which shows the example of the screen G of the product SH output from the computer C and displayed on the display part 5. FIG. It is a figure which shows the example of the screen G displayed on the display part, when setting the position of product SH with respect to the welding table. It is a figure which shows the example of the screen G displayed on the display part 5, when setting the support attitude | position of product SH. It is a figure which shows another example of the screen G displayed on the display part 5 when setting the support attitude | position of product SH. It is a figure which shows the example of the screen G displayed on the display part 5, when setting the inclination-angle in the support attitude | position of product SH. It is a figure which shows the example of the screen G displayed on the display part 5, when setting the height of the original pattern 21a of the support tool 21 which supports product SH. It is a figure which shows the example of the screen G displayed on the display part 5 when setting the interference site | part of product SH and the support tool 21. FIG. It is a figure which shows the example of the screen G on which the interference site | part of the set product SH and the support tool 21 was displayed. It is a figure which shows the example of the screen G displayed on the display part 5, when setting the abutting part 21a6 which positions the to-be-processed object 14. FIG. It is an expanded view which shows the to-be-processed objects 11-14 and the expanded shape 21t of the support tool 21. FIG. FIG. 5 is a layout diagram for explaining a state in which workpieces 11 to 14 and a developed shape 21t of a support 21 are arranged on a plate member 22; It is an expanded view for demonstrating the to-be-processed objects 51-55 in the pattern B of design. It is a perspective view which shows product SH2 obtained by integrating the to-be-processed objects 51-55. It is a figure which shows the example of the screen G of product SH2 output from the computer C and displayed on the display part 5. FIG. It is a figure which shows the example of the screen G displayed on the display part 5, when setting the support attitude | position of product SH2. It is a figure which shows the example of the screen G displayed on the display part 5, when setting the abutting part 61a6 which positions the to-be-processed object 55. FIG. It is a perspective view which shows intermediate goods SH2t in the middle of manufacture in the 1st process, and the original form 61a of the support tool 61. FIG. It is a perspective view which shows product SH2 and the original pattern 61a of the support tool 61 in the 2nd process. It is an expanded view which shows the to-be-processed objects 51-55 and the expanded shape 61t of the support tool 61. FIG. FIG. 6 is a layout diagram for explaining a state in which workpieces 51 to 55 and a developed shape 61t of the support 21 are arranged on a plate member 62.

A workpiece support tool design support apparatus S according to an embodiment of the present invention will be described with reference to FIGS. 1 to 23 by a computer C which is a preferred embodiment.
As shown in FIG. 1, a computer C that is a design support apparatus S includes at least a control unit 1, a storage unit 2, and an image generation unit 3, and functions as a three-dimensional CAD device.
The computer C is connected to an input unit 4 including a mouse and keyboard, a media drive, and the like, and a display unit 5 such as a display for displaying an image.
The input unit 4 or the display unit 5 may be provided on the computer C side.

Via the input unit 4, a user instruction S <b> 1 that is an instruction from the worker H and design information J <b> 1 related to design are input to the control unit 1.
Also, a workpiece support design design support program PGM (hereinafter simply referred to as a design support program PGM) of the present invention is supplied via the input unit 4 and stored in the storage unit 2 and installed in the computer C. .

The worker H designs the workpiece support using the computer C configured as described above as the design support apparatus S.
In the following, the design example will be described using pattern A and pattern B based on two types of products.

[Pattern A]
In the pattern A, the workpieces are a plurality of (four in this example) plate-like members 11 to 14. The plate material is, for example, a SUS material having a plate thickness of 1 mm, but is not limited thereto.
After the plate-like members 11 to 14 are cut out from the material, pre-processing (bending, punching, etc.) may be performed as necessary.
FIG. 2 is a development view of each of the plate-like members 11 to 14 and corresponds to a state cut out from the plate material. The dashed-dotted line of the plate-shaped members 11 and 12 has shown the position used as a clear ridgeline by the bending process after cut out.
The plate-like members 11 to 14 are referred to as a left side plate 11, a right side plate 12, a rear side plate 13, and a top plate 14 for convenience.
The worker H uses the support tool 21 designed and created with the pattern A, and forms the substantially box-shaped product SH having a three-dimensional shape by integrating the plate-like members 11 to 14 by welding.

In the pattern A, the plate-like members 11 to 14 supported by being placed on the support tool 21 can be all welded without being placed on the support tool 21, and the product SH is obtained without being replaced. The
FIG. 3 is a perspective view showing the product SH. In FIG. 3, the bottom side of the product SH is open without a bottom plate. The welding site | parts given in order to integrate the plate-shaped members 11-14 are shown as welding site | parts Y1-Y5. That is, welding is performed along five ridge lines to form a product SH.

Next, a specific design procedure will be described.
The computer C is preinstalled with the design support program PGM of the present invention as software.
Basic three-dimensional data of a processing machine (in this example, a welding machine) that processes the plate-like members 11 to 14 is stored in the storage unit 2 in advance, or obtained from an external database or the like and stored in the storage unit 2. Remember. Here, it is assumed that the three-dimensional data of the welding table T of the welding apparatus is stored in the storage unit 2 in advance.

(Step A1) <Import and display of 3D data>
First, three-dimensional data of the product SH is imported via the input unit 4 according to an instruction from the worker H. Thereby, the three-dimensional data of the product SH is stored in the storage unit 2.
When the worker H causes the design support program PGM to be executed, the control unit 1 controls the operation of the computer C based on the design support program PGM.
First, the control unit 1 refers to the three-dimensional data of the product SH stored in the storage unit 2, causes the image generation unit 3 to generate a three-dimensional image, and displays the three-dimensional image on the display unit 5 (see FIG. 4).

FIG. 4 is a diagram showing a screen G generated by the image generation unit 3 and displayed on the display unit 5.
The screen G is designed to have, for example, three screen areas.
Specifically, the three screen areas include a function area G1 for displaying a two-dimensional perspective view of a target workpiece or the like viewed from an arbitrary viewpoint, a function selection tool bar, and the like for function selection. An area G2 and a side view area G3 that allows selection of a display history, other files, and the like.
The size and arrangement of the areas G1 to G3 can be freely set by the operator H.

(Step A2) <Setting of basic posture of product SH>
The worker H displays a perspective view of the product SH in the work area G1. In this display, the worker H can freely change the direction and size of the product SH.
Based on the display of the product SH, the operator H determines the welding order of the welding parts Y1 to Y5 and determines the approximate support posture of the product SH that enables welding in the welding order.

In this example, the worker H sets the welding order to, for example, the order of the welding parts Y1 to Y5.
That is, in welding, first, the left side plate 11, the right side plate 12, and the rear side plate 13, which are three plate-like members, are integrated by welding the welding portions Y1 to Y3.
Next, the top plate 14 is placed and the welded portions Y4 and Y5 are welded to obtain a product SH.
Therefore, the general basic posture is determined to be a posture in which the top plate 14 side to be mounted later is upward.
On the screen G, an input standby screen (not shown) generated by the image generation unit 3 is displayed together with the image of the product SH, so that the worker H inputs these determination items on the screen G, Set.

(Step A3) <Display of product SH and welding table T>
The control unit 1 displays the welding table T on the work area G1 based on the three-dimensional data stored in the storage unit 2, and uses the welding table T as the support posture determined in (Step A2). Is placed above and displayed.
Specifically, the product SH is placed in the air above the center of the welding table T with a predetermined flying distance L1 (for example, 30 mm in actual size).
FIG. 5A is a side view seen from the horizontal position in this state, and FIG. 5B is a perspective view seen obliquely from above.

(Step A4) <Display of prototype 21a of support 21>
The control unit 1 displays the product SH and the prototype 21a as a template of the support 21 that supports the product SH in the work area G1 automatically through (Step A3) or according to an instruction from the worker H. FIG. 6 shows a screen in which the screen on which the product SH and the prototype 21a are superimposed and displayed at the same time is displayed as a top view. The prototype 21a is not a support tool 21 of the final shape determined, but a model model for adding size and shape deformation in the design of the support tool 21 by the operator H and the control unit 1.
The design support program PGM sets the prototype 21a of the support tool 21 not in a complicated shape but in a shape that can be easily formed by punching and bending from a plate material. The screen shown in FIG. It comes to present. A specific example of the shape of the prototype 21a is a rectangular box (bottomed rectangular tube).
In this example, the prototype 21a is presented in a rectangular box shape having a bottom portion 21a1 that is a rectangular flat plate and side plates 21a2 to 21a5 that are bent at right angles in the same direction from each side of the bottom portion 21a1.
The operator H can cancel the simultaneous display of the product SH and the prototype 21a by operation and selectively display each of them.

(Step A5) <Basic setting of prototype 21a>
The worker H sets the position and size (original size) of the prototype 21a with respect to the product SH along the following (Step A5-R1) and (Step A5-R2) while viewing the screen of the top view shown in FIG. .

(Step A5-R1) <Setting of restriction part PV and restriction part PH>
When the worker H supports the product SH with the support tool 21, the worker H abuts and supports the product SH from the vertically lower side and restricts the movement in the horizontal direction (regulation portion PV) and the movement in the horizontal direction. A part to be positioned (regulation part PH) is set.
Specifically, on the screen shown in FIG. 6, the restriction site PV is marked with a red circle and the regulation site PH is marked with a red line by an operation such as mouse click or dragging. FIG. 7 shows a state in which the red circle and the red line are given, with a black circle and a thick black dashed line, respectively.
The control unit 1 associates the positions of the attached restriction sites PV and PH with the three-dimensional data of the product SH.

Here, the regulation part PV is set as a part where the side plates 21a2 to 21a5 of the prototype 21a abut on the plate members 11 to 13 constituting the product SH in the vertical direction. More specifically, the set number corresponds to each of the plate-like members 11 to 13 at least two places. That is, in this example, six restriction sites PV1 to PV6 are set.
In this operation, the plate-like members 11 to 13 and the bottom 21a1 are prevented from interfering with each other.

For example, as shown in FIG. 7, the size ratio between the product SH and the prototype 21a and the angle θa formed between the center line CL1 of the product SH and the center line CL2 of the prototype 21a are adjusted, and the side plate 21a5 has two locations. The regulation sites PV1 and PV6, the side plate 21a3, and the two regulation sites PV2 and PV3, and the side plate 21a4, the two regulation sites PV4 and PV5 are obtained.
On the other hand, the restriction part PH is set as a part where the posture of the product SH is rotated around a predetermined horizontal axis, which will be described later, and the product SH abuts so that the weight of the product SH generates a horizontal component force.
For example, a line segment connecting the restriction part PH1 and the restriction part PH2 in contact with the prototype 21a is designated as the restriction part PH. In this example, the rear side plate 13 is selected by the worker H.
In this setting, the worker H is defined as a part where the single piece set from the plate-like members 11 to 14 before welding and the product SH during and after welding are supported as stably as possible. It is set by judgment.

(Step A5-R2) <Setting of the height of the prototype 21a and the inclination posture of the product SH>
As shown in FIG. 8, the control unit 1 displays the outline of the product SH (at least the ridge line on the top side) and the welding table T in the work area G1 in a horizontal view. FIG. 8 corresponds to the view seen from the direction of arrow YS1 in FIG. In FIG. 8, the contour line LN1 is shown by a one-dot chain line.
The operator H slightly rotates the contour line LN1 clockwise. The contour position by this rotation is indicated by a contour line LN2. This rotation angle may be a desired angle (for example, about 5 °).
The rotation axis P1, which is the rotation axis, may be set corresponding to the restriction site PH set in (Step A5-R1).

  The operator adjusts the vertical vertical position of the contour line LN2 so that the distance between the bottom end P2 on the welding table T side of the contour line LN2 and the welding table T is approximately the flying distance L1.

The control unit 1 repeatedly calculates the center of gravity position of the product SH accompanying the rotation in real time or in a short cycle.
When the space range in which the center of gravity position of the product SH is allowed is set in advance by the operator H or the like, the control unit 1 has the center of gravity position moved with the rotation of the product SH within the allowable space range. Or whether it is out of range.
When the control unit 1 determines that the center of gravity of the product SH has moved out of the allowable space range due to the turning operation of the product SH, the control unit 1 notifies the operator H of that fact or gives an alarm from an output unit (not shown). Output.

Further, the control unit 1 repeatedly calculates the moment applied to the restriction sites PV1 to PV6 by gravity when the product SH is supported by the support 21 with respect to the rotation operation of the product SH in real time or in a short cycle.
Depending on the rotation angle, when the moment is increased, the deformation of the support 21 becomes remarkable in any of the restriction sites PV1 to PV6, and it may be determined that the product SH cannot be substantially supported.
Therefore, the control unit 1 compares the moment changing according to the rotation angle of the product SH with the strength determined by the material of the support 21 and the plate thickness in consideration of a predetermined safety factor. It is evaluated whether or not the allowable range of the support 21 has been exceeded.
When the control unit 1 determines that the moment of the product SH has exceeded the allowable range in accordance with the turning operation of the product SH, the control unit 1 notifies the operator H of the fact or outputs an alarm from an output unit (not shown).

The worker H rotates the product SH and sets an inclined posture within a range where no notification or alarm is output regarding gravity and moment.
Furthermore, in the set inclination posture, the vertical vertical direction is finely adjusted so that the distance between the vertical lowermost end of the product SH and the welding table T becomes the flying distance L1, and the floating position of the product SH with respect to the welding table T is determined.
The control unit 1 sets a distance L2 that is the height from the welding table T of the rotation axis P1 at the determined floating position as the height of the prototype 21a.
The prototype 21a whose height is set at the distance L2 is displayed in the work area G1, for example, as shown in FIG.
The control unit 1 reflects the set content in the three-dimensional data of each of the product SH and the prototype 21a.

(Step A6) <Interference site setting>
When the position of the product SH with respect to the welding table T and its tilting posture, the size of the original 21a and the relative position with respect to the tilting posture of the product SH are set in the steps so far, the part where the product SH and the original 21a interfere is specified. To do.
This setting is executed manually by the worker H or automatically by the control unit 1 based on the three-dimensional data.

  In the case of manual setting by the worker H, it is specified by marking the interference part of both members visually on the screen. At this time, if the product SH set in the work area G1 and the prototype 21a are provisionally defined as an integrated object by grouping, the work is facilitated.

In the case of automatic setting by the control unit 1, the control unit 1 extracts a part interfering on the three-dimensional data and displays the part so that the operator H can grasp the part on the screen. For example, a blue line is attached.
10 and 11 are diagrams showing the presence or absence of the display of the blue line and the like, which are displayed on the screen as viewed from the front side of the welding table T (in the direction of arrow YS1 in FIG. 6). FIG.
FIG. 10 shows a state where no interference site is displayed, and FIG. 11 shows a screen on which the control unit 1 extracts and displays the interference site. In this figure, a visible interference site F1 at a non-hidden position is indicated by a thick solid line, and interference sites F2 to F5 at a hidden and invisible position are indicated by a thick broken line.
The interference part F1 corresponds to the restriction part PV1, and the interference parts F2, F3, F5 correspond to the restriction parts PV2, PV3, PV5, respectively.
Interference portions F4 and F6 corresponding to the restriction portions PV4 and PV6 are at positions overlapping with the restriction portions PV1 and PV5, and are superimposed on the interference portions F1 and F5 in the viewing direction shown in FIG.

The worker H confirms the positions, shapes, lengths, and the like of the interference sites F1 to F6 extracted and displayed by the control unit 1, and corrects them manually as necessary.
When correction is no longer necessary, a determination button (not shown) displayed on the screen G is pressed according to an instruction from the control unit 1. Thereby, the control unit 1 determines the interference sites F1 to F6 and reflects them in the three-dimensional data.

(Step A7) <Notch setting>
When the setting of (Step A6) is completed by the setting instruction of the worker H, the control unit 1 automatically provides the cutouts K1 to K6 in the parts corresponding to the interference parts F1 to F6 of the prototype 21a. At this time, the shapes of the notches K1 to K6 are set so that a clearance of a predetermined value or more is generated between the interfering plate-like members 11 to 14.
In an actual welding operation, the plate-like members 11 to 13 before welding are inserted into the notches K1 to K6.
Therefore, the predetermined value of the clearance is set so as to suppress the occurrence of distortion and facilitate the insertion of the plate-like members 11 to 13 before welding and the removal after welding. For example, one side is 0.1 mm.
The predetermined value of the clearance is set by the operator H inputting and confirming the clearance predetermined value input screen (not shown) displayed on the screen G.
The control unit 1 reflects the contents set for the notches K1 to K6 in the three-dimensional data.

(Step A8) <Setting of abutting part>
The product SH is obtained by mounting the top plate 14 at the position shown in FIG. 7 on the plate-like members 11 to 13 joined at the welding parts Y1 to Y3 and joining them by welding.
The plate-like members 11 to 13 on which the top plate 14 is placed are inclined and supported by the support tool 21 as described above.
Therefore, the worker H sets the abutting portion 21a6 in the work area G1 so that the placed top plate 14 is positioned without shifting due to its own weight.
For example, as shown in FIG. 12, when the top plate 14 is placed, the pair of abutting portions 21a6 are placed on the side plate 21a4 and the side plate 21a5 of the prototype 21a so as to come into contact with the end surface 14a on the lower side of the inclination. Set to be formed by bending from
The control unit 1 reflects the set contents of the abutting unit 21a6 in the three-dimensional data.

  The execution order of the setting of the notches K1 to K6 (Step A7) and the setting of the abutting part (Step A8) may be either. Of course, you may make it progress simultaneously.

(Step A9) <Output of development view>
Based on the three-dimensional data reflecting the contents set in each step, the control unit 1 obtains the unfolded shape of the plate-like members 11 to 14 to be the product SH and the prototype 21a to be the support tool 21, and displays the image. Or output by printing.
FIG. 13 shows the output contents. In FIG. 13, the alternate long and short dash line indicates a mountain fold, and the broken line indicates a valley fold.

(Step A10) <Layout to plate>
The control unit 1 lays out the developed shape 21t of the plate-like members 11 to 14 to be the product SH and the prototype 21a to be the support tool 21 obtained in (Step A9) on the same plate 22. The layout result (FIG.) Is output as an image or print.
The control unit 1 selects, as the plate material 22, one having the smallest size or the lowest price among the fixed-size plate materials that can be laid out.
The setting of the plate material 22 is selected by the control unit 1 from information on the plate material stored in a database (not shown), or is set by direct input by the operator.
FIG. 14 shows an example of the layout diagram.
In the layout diagram, the control unit 1 adds “Δ” to a portion that is a mountain fold, and attaches a symbol “ΔΔ” to a portion that is a valley fold.

When the production quantity of the product SH is 1, the control unit 1 in principle has one unfolded shape 21t of the prototype 21a that becomes the support 21 for supporting the plate-like members 11 to 13 on one plate material 22, and the product SH. A set of plate-like members 11 to 14 is laid out. An example of this is shown in FIG.
When the production quantity of the product SH is K pieces (K: an integer equal to or greater than 2), the control unit 1 basically has a prototype 21a serving as a support 21 for supporting the plate-like members 11 to 13 on one plate member 22. One unfolded shape 21t and K sets of plate-like members 11 to 14 to be the product SH are laid out. If the layout cannot be performed with a certain size of the plate 22, a plate 22 having a size that allows layout is selected.
In addition, when the production quantity of the product SH is large and does not fit in the plate material 22 of a desired size, the remainder that is not partitioned by the first plate material 22 is transferred to the plate material 22 of the second and subsequent sheets. Layout as only 14 sets.

The design in the pattern A described in detail above is a design example in which the product SH can be obtained by welding the plate-like members 11 to 14 supported by being placed on the support 21 without being replaced. .
In addition to the pattern A, a design example of the pattern B that is replaced to obtain the product SH2 will be described below.

[Pattern B]
In the pattern B, the workpieces are a plurality of (in this example, five) plate-like members 51 to 55. The plate material is, for example, a SUS material having a plate thickness of 1 mm, and is not limited thereto.
The plate-shaped members 51 to 55 may be subjected to pre-processing (bending, punching, etc.) as necessary after being cut out from the material.

FIG. 15 is a development view of the plate-like members 51 to 55 and corresponds to a state of being cut out from the plate material. The broken lines of the plate-like members 51 and 52 indicate positions that become clear ridgelines in the bending process after being cut out.
The plate members 51 to 55 are referred to as a left side plate 51, a right side plate 52, a rear side plate 53, a top plate 54, and a bottom plate 55, respectively, for convenience.
The worker H uses the support 61 designed and created by the pattern B, and integrates the plate-like members 51 to 55 by welding to form a substantially box-shaped product SH2.

  In the pattern B, the plate-like members 51 to 53 and the plate-like member 55 supported by being placed on the support 61 are subjected to predetermined welding in the first support posture in the first step, and then the second step. , The plate-like member 54 is integrated by a predetermined welding in a second support posture (second posture) that is turned upside down by replacement, and a product SH2 is obtained.

FIG. 16A and FIG. 16B are perspective views showing the product SH2. FIG. 16A is a diagram of the product SH2 as viewed obliquely from above, and is a diagram corresponding to FIG. 3 for the product SH. FIG.16 (b) is the figure seen from diagonally downward.
As shown in FIG. 16B, a bottom plate 55 smaller than the top plate 54 in the front-rear direction is attached to the lower side of the product SH2.
16 (a) and 16 (b) show the welding parts to be applied to integrate the plate-like members 51 to 55 as welding parts Y51 to Y57. That is, welding is performed along seven ridge lines to form the product SH2.

Next, a specific design procedure will be described.
The computer C is preinstalled with the design support program PGM of the present invention as software.
Basic three-dimensional data of a processing machine (in this example, a welding machine) for processing the plate-like members 51 to 55 is stored in the storage unit 2 in advance, or obtained from an external database or the like and stored in the storage unit 2. Remember. Here, it is assumed that the three-dimensional data of the welding table T of the welding apparatus is stored in the storage unit 2 in advance.

(Step B1) <Import and display of 3D data>
First, three-dimensional data of the product SH2 is imported via the input unit 4 according to an instruction from the worker H. Thereby, the three-dimensional data of the product SH2 is stored in the storage unit 2.
When the worker H causes the design support program PGM to be executed, the control unit 1 controls the operation of the computer C based on the design support program PGM.
First, the control unit 1 refers to the three-dimensional data of the product SH2 stored in the storage unit 2, causes the image generation unit 3 to generate a three-dimensional image, and displays it on the display unit 5 (see FIG. 17).
FIG. 17 is a diagram illustrating a screen G displayed on the display unit 5. The display configuration of the screen G is the same as that of the pattern A.

(Step B2) <Setting of basic posture of product SH2>
The worker H displays a perspective view of the product SH2 in the work area G1. In this display, the operator can freely change the direction and size of the product SH2.
Based on the display of the product SH2, the worker H determines the welding order of the welding parts Y51 to Y57 and determines the general support posture of the product SH2 that enables welding in the welding order.

In this example, the worker H has a procedure of joining the bottom plate 55 to the left side plate 51 and the right side plate 52 by welding first, then turning the plate upside down and welding the top plate 54. Accordingly, the welding order is the order of the welded parts Y51 to Y57.
That is, in welding, first, the left side plate 51, the right side plate 52, and the rear side plate 53, which are three plate-like members, are integrated by welding the welding portions Y51 to Y53.
Next, it is assumed that the top plate 54 is placed and the welded portions Y54 and Y55 are welded to produce the product SH2.
For this reason, the first basic posture is determined to be a posture in which the bottom plate 55 side to be welded first is the top of the top plate 54 and the bottom plate 55.
On the screen G, an input standby screen (not shown) generated by the image generation unit 3 is displayed together with the product SH2, so that the worker H inputs and sets these determination items on the screen G. .

(Step B3) <Display of product SH and welding table T>
The control unit 1 displays the welding table T on the work area G1 based on the three-dimensional data stored in the storage unit 2, and sets the product SH2 as the support posture determined in (Step B2). Is placed above and displayed.
Specifically, the product SH2 is placed in the air above the center of the welding table T with a predetermined flying distance L1 (for example, 30 mm in actual size).
The side view seen from the horizontal position in this state is the same as FIG. 5A, and the perspective view seen obliquely from the top is the same as FIG.

(Step B4) <Display of prototype 61a of support 61>
The control unit 1 displays the product SH2 and the prototype 61a as a template of the support tool 61 that supports the product SH2 at the same time in the work area G1 automatically through (Step B3) or according to an instruction from the worker H. FIG. 6 shows a screen in which the screen on which the product SH2 and the prototype 61a are simultaneously superimposed is displayed as a top view. Reference numerals relating to the product SH2 and the prototype 61a are shown in parentheses. The bottom plate 54 is indicated by a broken line.
The design support program PGM sets the prototype 61a of the support tool 61 not in a complicated shape but in a shape that can be easily formed from a plate material by punching and bending. The screen shown in FIG. It comes to present. A specific example of the shape of the prototype 61a is a rectangular box (bottomed rectangular tube).
In this example, the prototype 61a is presented in a square box shape having a bottom 61a1 that is a rectangular flat plate and side plates 61a2 to 61a5 that are bent at right angles in the same direction from each side of the bottom 61a1.
The operator H can cancel the simultaneous display of the product SH2 and the prototype 61a by an operation and selectively display each of them.

(Step B5) <Basic setting of prototype 61a>
The worker H sets the position and size (original size) of the prototype 61a with respect to the product SH2 along the following (Step B5-R1) and (Step B5-R2) while viewing the screen of the top view shown in FIG. .

(Step B5-R1) <Setting of restriction part PV and restriction part PH>
When the worker H supports the product SH2 with the support tool 61, the worker H abuts and supports the product SH from the vertically lower side and regulates the position (regulation site PV) and the movement in the horizontal direction. A part to be positioned (regulatory part PH) is set.
Specifically, on the screen shown in FIG. 6, the restriction site PV is marked with a red circle and the regulation site PH is marked with a red line by an operation such as mouse click or dragging. FIG. 18 shows a state in which the red circle and the red line are given, with a black circle and a thick black dotted line, respectively.
The control unit 1 associates the positions of the attached restriction sites PV and PH with the three-dimensional data of the product SH2. This procedure is the same as pattern A.

  Here, the regulation part PV is set as a part where the side plates 61a2 to 61a5 of the prototype 61a abut on the plate members 51 to 53 constituting the product SH2. More specifically, the set number corresponds to each of the plate-like members 51 to 53 at least two places. That is, in this example, six restriction sites PV51 to PV56 are set. In this operation, the plate-like members 51 to 53 and the bottom portion 61a1 are prevented from interfering with each other.

For example, as shown in FIG. 18, the size ratio between the product SH2 and the prototype 61a and the angle θb formed between the center line CL51 of the product SH2 and the center line CL52 of the prototype 61a are adjusted, and the side plate 61a5 The regulation sites PV51 and PV56 and the side plate 61a3 provide two regulation sites PV52 and PV53, and the side plate 61a4 provides two regulation sites PV54 and PV55.
On the other hand, the restriction part PH is set as a part that abuts the product SH2 so that the posture of the product SH2 is rotated around a predetermined horizontal axis, which will be described later, and the weight of the product SH2 generates a horizontal component force.
For example, a line segment connecting the restriction part PH51 and the restriction part PH52 contacting the prototype 61a is designated as the restriction part PH. In this example, similarly to the pattern A, the rear side plate 53 is selected by the operator H.
In this setting, the worker H is defined as a part where the single piece set from the plate-shaped members 51 to 54 before welding and the product SH2 during and after welding are supported as stably as possible with respect to the support tool 61. It is set by judgment.

(Step B5-R2) <Setting of the height of the original 61a and the inclination posture of the product SH2>
Similar to the pattern A, the control unit 1 displays the contour line (at least the ridge line on the top side) and the welding table T of the product SH2 in the horizontal direction in the work area G1, as shown in FIG. In FIG. 8, the contour line LN51 is indicated by a one-dot chain line.
The worker H slightly rotates the contour line LN51 clockwise. The contour position by this rotation is indicated by a contour line LN52. This rotation angle may be a desired angle (for example, about 5 °).
The rotation axis P51, which is the rotation axis, may be set corresponding to the restriction site PH set in (Step B5-R1).

  The operator adjusts the vertical vertical position of the contour line LN52 so that the distance between the bottom end P52 on the welding table T side of the contour line LN52 and the welding table T is approximately the flying distance L51.

The control unit 1 repeatedly calculates the position of the center of gravity of the product SH2 accompanying the rotation in real time or in a short cycle.
When the space range in which the center of gravity of the product SH2 is allowed is set in advance by the operator H or the like, the control unit 1 determines that the center of gravity moved by the rotation of the product SH2 is within the allowable space range. It is determined whether it is out of the range.
When the control unit 1 determines that the center of gravity of the product SH2 has moved out of the allowable space range due to the turning operation of the product SH2, the control unit 1 notifies the operator H of that fact or gives an alarm from an output unit (not shown). Output.

In addition, the control unit 1 repeatedly calculates the moment applied to the restriction parts PV51 to PV56 by gravity when the product SH2 is supported by the support 61 in real time or in a short cycle with respect to the rotation operation of the product SH2.
Depending on the rotation angle, when the moment is increased, the deformation of the support 61 becomes significant in any of the restriction parts PV51 to PV56, and it may be determined that the product SH2 cannot be substantially supported.
Therefore, the control unit 1 compares the moment that changes according to the rotation angle of the product SH2 with the strength that is determined by the material and thickness of the support 61 in consideration of a predetermined safety factor. It is evaluated whether or not the allowable range of the support 61 has been exceeded.
When the control unit 1 determines that the moment of the product SH2 has exceeded the allowable range due to the turning operation of the product SH2, the control unit 1 notifies the operator H of the fact or outputs an alarm from an output unit (not shown).

The worker H rotates the product SH2 and sets an inclined posture within a range where no notification or alarm is output regarding gravity and moment. The tilt angle in this tilt posture is defined as a tilt angle θf (see FIG. 10).
Further, in the set inclination posture, the vertical vertical direction is finely adjusted so that the distance between the vertical lowest end of the product SH2 and the welding table T becomes the flying distance L51, and the flying position of the product SH2 with respect to the welding table T is determined.
The control unit 1 sets the distance L52, which is the height from the welding table T of the rotation shaft P51 at the determined floating position, as the height of the prototype 61a.
The prototype 61a whose height is set at the distance L52 is displayed in the work area G1, for example, as shown in FIG.
The control unit 1 reflects the set contents in the three-dimensional data of the product SH2 and the prototype 61a.

(Step B6) <Interference site setting>
When the position of the product SH2 with respect to the welding table T and its inclination posture, the size of the original 61a, the relative position with respect to the inclination posture of the product SH2, etc. are set in the steps so far, the site where the product SH2 and the original 61a interfere is specified. To do.
This setting is executed manually by the worker H or automatically by the control unit 1 based on the three-dimensional data.

  In the case of manual setting by the worker H, it is specified by marking the interference part of both members visually on the screen. At that time, if the product SH2 and the prototype 61a set in the work area G1 are provisionally defined by grouping as an integrated object, the work becomes easy.

In the case of automatic setting by the control unit 1, the control unit 1 extracts a part interfering on the three-dimensional data and displays the part so that the operator H can grasp the part on the screen. For example, a blue line is attached.
FIG. 10 shows a state where no interference site is displayed, and FIG. 11 shows a state where the interference site is displayed. In FIG. 11, the interference site F51 at a position that is not hidden is indicated by a thick solid line, and the interference sites F52 to F55 at a position that is hidden and cannot be seen are indicated by a thick broken line.
The interference site F51 corresponds to the regulation site PV51, and the interference sites F52 to F55 correspond to the regulation sites PV52 to PV55, respectively.
The interference part F56 corresponding to the restriction part PV56 is in a position overlapping with the restriction part PV55, and is displayed so as to be superimposed on the interference part F55 in the viewing direction shown in FIG.

The worker H confirms the positions, shapes, lengths, and the like of the interference sites F51 to F55 extracted and displayed by the control unit 1, and manually corrects them as necessary.
When correction is no longer necessary, a determination button (not shown) displayed on the screen G is pressed according to an instruction from the control unit 1. Thereby, the control unit 1 determines the interference sites F51 to F56 and reflects them in the three-dimensional data.

(Step B7) <Notch setting>
In accordance with the setting instruction of the worker H or automatically when the setting of (Step B6) is completed, the control unit 1 provides the cutouts K51 to K56 at portions corresponding to the interference portions F51 to F56 of the prototype 61a. At that time, the shapes of the notches K51 to K56 are set so that a clearance of a predetermined value or more is generated between the interfering plate-like members 51 to 54.
In an actual welding operation, the plate-like members 51 to 53 before welding are inserted into the notches K51 to K56.
Therefore, the predetermined value of the clearance is set so as to suppress the derivation of distortion and facilitate the insertion of the plate-like members 51 to 53 before welding and the removal after welding. For example, one side is 0.1 mm.
The predetermined value of the clearance is set by the operator H inputting and confirming the clearance predetermined value input screen (not shown) displayed on the screen G.
The control unit 1 reflects the contents set for the notches K51 to K56 in the three-dimensional data.

(Step B8) <Setting of abutting part>
In the actual manufacturing process, first, the bottom plate 55 is placed on the plate-like members 51 to 53 at the position shown in FIG. 7 and joined by welding.
Prior to welding, the plate-like members 51 to 53 on which the bottom plate 55 is placed are inclined and supported by the support 61 as described above.
Therefore, in the design of the support tool 61, the worker H sets the abutting portion 61a6 in the work area G1 so that the placed bottom plate 55 is positioned without shifting due to its own weight.
For example, as shown in FIG. 19, when the bottom plate 55 is placed, the abutting portion 61a6 is either one of the side plate 61a4 and the side plate 61a5 of the prototype 21a so as to come into contact with the end surface 55a on the lower side of the inclination. It is set to be formed by bending from (or both). In this example, it is formed by bending from the side plate 61a4.
The control unit 1 reflects the set content of the butting unit 61a6 in the three-dimensional data.

  The execution order of the setting of the notches K51 to K56 (Step B7) and the setting of the abutting part (Step B8) may be either. You may make it progress simultaneously.

This is the design for the second process.
In the first step, the plate-like members 51 to 53 and the bottom plate 55 are integrated by welding using the notches K51 to K56 and the abutting portion 61a6 set by (Step B1) to (Step B8). This is a process for obtaining the product SH2t.
In the second step, the intermediate product SH2t is once removed from the support tool 61, turned upside down and placed and supported on the support tool 61 in a second posture with the bottom plate 55 positioned downward, and the top plate 54 is welded. This is a process for obtaining the product SH2.

(Step B9) <Setting of notch and butting part used in second step>
The setting method of the notches K67 to K72 and the abutting portion 61a7 for the second step is the same as the setting method of the notches K1 to K6 and the abutting portion 21a6 described in the pattern A.
20 and 21 show a working area showing a prototype 61a set by adding notches K67 to K72 and abutment 61a7 to notches K51 to K56 and abutment 61a6 set in (Step B1 to StepB8). It is a figure on G1.
FIG. 20 shows a state where the intermediate product SH2t is placed in the first step, and FIG. 21 shows a state where the product SH2 is placed in the second step.
Here, the notches K67 to K72 correspond to the notches K1 to K6 in the pattern A, respectively, and the abutting portion 61a6 corresponds to the abutting portion 21a6 in the pattern A.

The operator H sets the notches K67 to K72 so as not to interfere with the notches K51 to K56. In addition, when the intermediate product SH2t obtained by completing the first step is removed upward, and mounted again on the support tool 21 in the second posture inverted upside down, the member welded in the first step (this In the example, care is taken so that the bottom plate 55) does not interfere with the support 21.
The control unit 1 simulates this inversion mounting process in the form of three-dimensional data, and when it is determined that interference occurs between members, a warning is output to the outside to prompt the worker H to reconsider.

In this example, the inclination angle θf of the product SH2 in the first posture and the second posture is the same because the members to be reversed and mounted on the support tool 21 are the same (plate-like members 51 to 53). Yes. Therefore, the regulation part PV and the regulation part PH are the same.
Of course, when the members to be reversed and mounted on the support tool 21 are different or when additional members whose center of gravity is greatly moved are integrated (or integrated), the conditions including the inclination angle θf are set. A different posture may be used.

(Step B10) <Output of development view>
Based on the three-dimensional data reflecting the contents set in each step, the control unit 1 obtains the developed shape of the plate-like members 51 to 55 that become the product SH2 and the prototype 61a that becomes the support tool 61, and displays the image. Or output by printing.
FIG. 22 shows the output contents. In FIG. 22, the alternate long and short dash line indicates a mountain fold, and the broken line indicates a valley fold.

(Step B11) <Layout to plate>
The control unit 1 lays out the developed shape 61t of the plate-like members 51 to 55 to be the product SH2 and the prototype 61a to be the support tool 61 obtained in (Step B10) on the same plate material 62. The layout result (FIG.) Is output as an image or print.
The control unit 1 selects, as the plate material 62, one having the smallest size or the lowest price among the fixed-size plate materials that can be laid out.
The setting of the plate material 62 is selected by the control unit 1 from information on the plate material stored in a database (not shown), or is set by direct input by the operator.
FIG. 23 shows an example of the layout diagram.
In the layout diagram, the control unit 1 adds “Δ” to a portion that is a mountain fold, and attaches a symbol “ΔΔ” to a portion that is a valley fold.

When the production quantity of the product SH2 is 1, the control unit 1 basically has one unfolded shape 61t of the prototype 61a as the support 61 for supporting the plate-like members 51 to 53 on one plate member 23, and the product SH2. A set of plate-like members 51 to 55 is laid out.
When the production quantity of the product SH2 is K (K: an integer equal to or greater than 2), the control unit 1 is, in principle, a prototype 61a that serves as a support tool 61 that supports the plate-like members 51 to 53 on one plate member 23. One unfolded shape 61t and K sets of plate-like members 51 to 55 to be the product SH2 are laid out. If the layout cannot be performed with the size of a certain plate material 62, a plate material having a size that can be laid out is selected.
In addition, when the production quantity of the product SH2 is large and does not fit in the plate material 62 of a desired size, the remainder that has not been partitioned by the first plate material 62 is transferred to the plate material members 51 to 51 for the second and subsequent plate materials 62. Layout as only 55 sets.
In the example shown in FIG. 23, one unfolded shape 61t of the prototype 61a and five sets (five each) of the plate-like members 51 to 55 are laid out.

As described above, according to the pattern A and the pattern B described in detail, the control unit 1 sets the support 21 (61) that supports a product having a simple structure as a box-shaped object that can be formed by bending from one plate-like member. Then, the prototype 21a (61a) is presented on the display unit 5.
The worker H can support the support 21 (61) on the screen of the display unit 5 by receiving the weight of each of the plate-like members 11 to 13 (61 to 63), and the side plates 21a2 to 21a5 (61a2). ˜61a5) and the bottom 21a1 (61a1) may interfere with each other at a plurality of sites and may be virtually arranged by adjusting the relative posture, the relative position, or the size so as not to interfere.
Thus, since the shape of the support tool 21 (61) is simple and the operation on the screen is easy, the operator H can easily design the support tool 21 (61) without mistakes.

Since the control part 1 sets the support tool 21 (61) as a simple box-shaped object, even if the calculation speed is not high, it is sufficiently applicable to actual use.
Therefore, the capital investment can be suppressed, the operation program can be small, and can be provided at a relatively low cost.

  Since the support tool 21 (61) is set as a simple box-like product, the product SH (SH2) and the support tool 21 (61) can be obtained together from the same plate material, and the manufacturing efficiency is improved.

With respect to the notches K1 to K6 (K51 to K56), when the support 21 (61) is in a posture in which the bottom 21a1 (61a1) is horizontal, at least one notch and the plate-like members 11 to 13 (51). To 53) at the contact point where the plate-like members 11 to 13 (51 to 53) come into contact with their own weight, the notches K1 to K6 (K51 to K56) and the plate-like members 11 to 13 (51 to 53). Either one is inclined with respect to the horizontal.
Thereby, positioning of the plate-shaped members 11-13 (51-53) which are a workpiece with respect to the support tool 21 (61) is reliably performed not only in a vertical direction but in a horizontal direction.

The embodiment of the present invention is not limited to the above-described configuration, and may be another modified example without departing from the gist of the present invention.
The process which integrates the plate-shaped members 11-14 (51-55) is not limited to welding. It may be an integrated process in which an adhesive or the like is applied and cured.
The form of the support is not limited as long as it is a box-shaped object. Moreover, it does not restrict to designing so that only one support may be used for manufacture of product SH (SH2). Of course, a plurality of types of supports may be set according to the shape of the product SH (SH2) and used to manufacture the product SH (SH2).

DESCRIPTION OF SYMBOLS 1 Control part 2 Memory | storage part 3 Image generation part 4 Input part 5 Display part 11 Left side board (plate-shaped member)
12 Right side plate (plate-like member)
13 Rear side plate (plate-like member)
14 Top plate (plate member)
21 support tool 21a prototype, 21a1 bottom part, 21a2 to 21a5 side plate 21a6 abutting part, 21t unfolded shape 22 plate material 51 left side plate (plate-like member)
52 Right side plate (plate-like member)
53 Rear side plate (plate-like member)
54 Top plate (plate member)
55 Bottom plate (plate member)
61 support 61a prototype, 61a1 bottom part, 61a2 to 61a5 side plate 61a6 abutting part, 61t developed shape 62 plate material C computer CL1, CL2, CL51, CL52 center line F1 to F6, F51 to F56 interference part G screen G1 work area, G2 Function selection area, G3 Side view area H Worker J1 Design information K1 to K6, K51 to K56 Notch LN1, LN2, LN51, LN52 Contour line L1, L51 Flying distance, L2, L52 Distance P1, P51 Rotating axis, P2 , P52 Lowermost end PGM Design support program PH, PH1, PH2, PH51, PH52 (horizontal direction) restriction part PV, PV1 to PV6, PV51 to PV56 (vertical direction) restriction part S Design support device SH, SH2 Product, SH2t Intermediate product S1 User instruction T Welding table Y 1 to Y5, Y51 to Y57 Welded part θa, θb angle, θf tilt angle

Claims (6)

A workpiece support design method for designing a workpiece support used when a three-dimensional product is formed by combining a plurality of plate-shaped workpieces using a three-dimensional CAD device,
A workpiece support modeling step for three-dimensionally modeling a box-shaped object having a bottom and a side plate raised from an edge of the bottom and having one side opened as a workpiece support;
A display step of simultaneously displaying the three-dimensional model of the product and the three-dimensional model of the workpiece support on the display unit;
On the screen of the display unit, the workpiece support can be supported by receiving the weight of each of the plate-like members, and interferes with the side plate at a plurality of portions and does not interfere with the bottom. A placement step for virtual placement by adjusting the relative posture, relative position, or size,
A notch part setting step in which the part of the side plate interfered with the workpiece is a notch part;
A method for designing a workpiece support, comprising: The workpiece support is formed by bending a plate-like member,
The workpiece support according to claim 1, further comprising a plate cutting step of cutting the workpiece and a plate-like member for forming the workpiece support into a single plate material. Tool design method.   When the workpiece support is in a posture in which the bottom is horizontal, at least one of the notch and the workpiece is brought into contact with the workpiece by its own weight. 3. The workpiece support design method according to claim 1, wherein one of the workpiece and the workpiece is inclined with respect to the horizontal.   The workpiece support tool design method according to claim 1, wherein welding is included in the combination of the plurality of workpieces in forming the product. A workpiece support design support device that supports the design of a workpiece support used when forming a three-dimensional product by combining a plurality of plate-shaped workpieces,
Provide a control unit to demonstrate the functions of a 3D CAD device,
The controller is
A box-like object having a bottom part and a side plate raised from the edge of the bottom part and having one side opened is modeled as a workpiece support tool, and the three-dimensional model of the product and the workpiece support While displaying the 3D model of the tool on the display at the same time,
A workpiece support design support apparatus, wherein a portion of the side plate where the workpiece interferes is set as a notch. Design support for workpiece support applied when designing a workpiece support used when forming a three-dimensional product by combining a plurality of workpieces in the form of a plate, using a three-dimensional CAD device A program,
On the computer,
A workpiece support modeling step for three-dimensionally modeling a box-shaped object having a bottom and a side plate raised from an edge of the bottom and having one side opened as a workpiece support;
A display step of simultaneously displaying the three-dimensional model of the product and the three-dimensional model of the workpiece support on the display unit;
On the screen of the display unit, the workpiece support can be supported by receiving the weight of each of the plate-like members, and interferes with the side plate at a plurality of portions and does not interfere with the bottom. A placement step for virtual placement by adjusting the relative posture, relative position, or size,
A notch part setting step in which the part of the side plate interfered with the workpiece is a notch part;
A workpiece support tool design support program characterized in that

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