JP2009110059A - Design device, design method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce rework man-hours due to design error. <P>SOLUTION: This method for designing a three-dimensional model in which a screw hole is embedded in a sheet metal, includes: a process (step A2) for calculating the diameter of the screw hole according to input-designated screw diameter, screw length and sheet metal thickness; a process (step A3) for measuring a distance from the bent section of the three-dimensional model related with the sheet metal to the center of the screw hole according to the input-designated screw hole position and bent section; a process (step S4) for deciding whether or not the measured distance from the bent section to the center of the screw hole is equal to or more than a prescribed distance; and a process (step A7) for, when the distance from the bend section to the center of the screw hole is equal to or more than the prescribed distance (step S4: YES), embedding the three-dimensional model related with the screw hole corresponding to the calculated screw hole diameter in the input-designated screw hole position in the three-dimensional model related with the sheet metal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a design device, a design method, and a program for designing a screw hole, and more particularly to a design device, a design method, and a program for designing a screw hole for a sheet metal.

  Conventionally, as a method for designing a screw hole using a CAD system, there is a method in which data on a screw and a screw hole are prepared in advance, and the screw and the screw hole for a workpiece are arranged according to a predetermined design condition. . For example, in Patent Document 1, an effective thread allowance to be screwed into a tap hole is ensured in accordance with a predetermined design condition within the range of the complete male thread portion, and a bolt arrangement reference is provided at the rear end position of the effective thread allowance. A bolt figure formed by arranging points and a screw effective latching margin having the same dimensions as the effective threading allowance of the bolt figure within the range of the complete female thread portion, and at the rear end position of the effective threading allowance A plurality of tap hole figures in which tap hole arrangement reference points corresponding to the bolt arrangement reference points are arranged are drawn in advance, and the bolt figure having an effective screw allowance according to the predetermined design conditions And a method for automatically determining the tapped hole graphic. According to this, the bolt figure and the tapped hole figure can be quickly arranged at the position where the effective screw allowance is adapted, and the man-hours required for calculating the effective screw allowance can be reduced, and the drawing efficiency is greatly improved. Is.

JP 2004-145739 A

  However, the invention described in Patent Document 1 may not be suitable for design due to the thickness of the metal plate and the size of the screw diameter when the screw hole is designed for the metal plate. In particular, when there is a bent portion in the sheet metal, the distance from the bent portion to the screw hole is limited so that the bent portion and the head of the screw do not conflict with each other. Can not cope with. That is, the invention described in Patent Document 1 does not take into account the shape of the workpiece, and therefore there is a risk that it will take a long man-hour if there is a design error in positioning the screw holes.

  The main problem of the present invention is to reduce the number of steps for backtracking due to a design error.

  According to a first aspect of the present invention, there is provided a design apparatus having an arithmetic processing unit for designing a three-dimensional model in which screw holes are embedded in a sheet metal, wherein the arithmetic processing unit includes an input designated screw diameter and screw. According to the length, the processing part for calculating the diameter of the screw hole according to the sheet metal thickness, the input designated position of the screw hole, and the bent part of the three-dimensional model related to the sheet metal, A processing unit for measuring a distance from a bent portion to the screw hole center, a processing unit for determining whether a measured distance from the bent portion to the screw hole center is equal to or greater than a predetermined distance, and A processing unit that embeds a three-dimensional model related to the screw hole corresponding to the calculated screw hole diameter at a position of the screw hole specified by input in the three-dimensional model related to the sheet metal when the distance is equal to or greater than a predetermined distance; It is characterized by having.

  According to a second aspect of the present invention, there is provided a design method for designing a three-dimensional model in which a screw hole is embedded in a sheet metal, and a screw is selected according to an input designated screw diameter, screw length, and sheet metal thickness. The distance from the bent portion to the center of the screw hole is measured according to the step of calculating the diameter of the hole, the position of the screw hole specified by the input, and the bent portion of the three-dimensional model related to the sheet metal. A step of determining whether the measured distance from the bent portion to the screw hole center is equal to or greater than a predetermined distance, and if the distance is equal to or greater than the predetermined distance, the calculated screw hole And embedding the three-dimensional model related to the screw hole corresponding to the diameter at the position of the screw hole designated as input in the three-dimensional model related to the sheet metal.

  In a third aspect of the present invention, a program for designing a three-dimensional model in which screw holes are embedded in a sheet metal, according to an input designated screw diameter, screw length, and sheet metal thickness, The distance from the bent portion to the screw hole center is calculated according to the step of calculating the diameter of the screw hole, the position of the screw hole specified by the input, and the bent portion of the three-dimensional model related to the sheet metal. A step of measuring, a step of determining whether the measured distance from the bent portion to the center of the screw hole is equal to or greater than a predetermined distance, and the screw calculated when the distance is equal to or greater than the predetermined distance The step of embedding the three-dimensional model related to the screw hole corresponding to the hole diameter at the position of the screw hole designated as input in the three-dimensional model related to the sheet metal is executed by a design apparatus.

  According to the present invention, it is possible to reduce the number of man-hours for design return due to a simple design mistake. In other words, considering the screw diameter, screw length, and sheet metal shape, the screw hole can be output with an appropriate screw diameter and screw hole position, so that it is possible to reduce the man-hours to return after design due to a simple design error. Further, when embedding screw holes in a sheet metal, it is possible to input and specify a screw hole position taking into consideration the necessity of a burring portion, a necessary distance from sheet metal bending, and the like. Even if the designer does not calculate the position and depth of the screw holes each time, an appropriate design value is calculated immediately, so design work efficiency can be improved.

  The design apparatus according to an embodiment of the present invention is a design apparatus (10 in FIG. 1) having an arithmetic processing unit (14 in FIG. 1) for designing a three-dimensional model in which screw holes are embedded in a sheet metal, The arithmetic processing unit (14 in FIG. 1) includes a processing unit that calculates the diameter of the screw hole according to the input specified screw diameter, screw length, and sheet metal thickness, and the input specified position of the screw hole. And a processing portion for measuring a distance from the bent portion to the screw hole center according to a bent portion of the three-dimensional model according to the sheet metal, and a measured distance from the bent portion to the screw hole center. Is a processing unit for determining whether or not the distance is equal to or greater than a predetermined distance, and if the distance is equal to or greater than the predetermined distance, a three-dimensional model related to the screw hole corresponding to the calculated screw hole diameter is added to the sheet metal. The position of the specified screw hole in the 3D model Having a processing unit embedded in.

  The design method according to the embodiment of the present invention is a design method for designing a three-dimensional model in which screw holes are embedded in a sheet metal, and depending on an input designated screw diameter, screw length, and sheet metal thickness, According to the step of calculating the diameter of the screw hole (step A2 in FIG. 2), the position of the screw hole specified by the input, and the bent portion of the three-dimensional model related to the sheet metal, the bent portion from the bent portion A step of measuring the distance to the screw hole center (step A3 in FIG. 2) and a step of determining whether the measured distance from the bent portion to the screw hole center is equal to or greater than a predetermined distance (FIG. 2) and when the distance is equal to or greater than the predetermined distance (YES in step A4 in FIG. 2), a three-dimensional model related to the screw hole corresponding to the calculated screw hole diameter is represented by 3 Before input specified in dimensional model Including the step of embedding the position of the screw holes (step A7 in FIG. 2), a.

  The program according to the embodiment of the present invention is a program for designing a three-dimensional model in which screw holes are embedded in a sheet metal, and according to an input designated screw diameter, screw length, and sheet metal thickness, Depending on the step of calculating the diameter of the screw hole (step A2 in FIG. 2), the position of the screw hole specified as input, and the bent portion of the three-dimensional model related to the sheet metal, A step of measuring the distance to the screw hole center (step A3 in FIG. 2) and a step of determining whether or not the measured distance from the bent portion to the screw hole center is equal to or greater than a predetermined distance (FIG. 2) and when the distance is equal to or greater than the predetermined distance (YES in step A4 in FIG. 2), a three-dimensional model related to the screw hole corresponding to the calculated screw hole diameter is represented by 3 Dimensional model And step (step A7 in FIG. 2) to be embedded in the position of the kick input given the threaded holes, to be executed by the design device (10 in Figure 1).

  A design apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram schematically showing a configuration of a design apparatus according to Embodiment 1 of the present invention.

  Based on the screw hole design program, the design apparatus 10 according to the first embodiment applies to the sheet metal according to the input designated screw diameter, screw length, sheet metal thickness, screw hole position, bent portion of the sheet metal, and the like. This is a computer system having a function of creating a three-dimensional model in which screw holes are embedded, and is a three-dimensional CAD system. The design apparatus 10 includes an input unit 11, an output unit 12, a storage unit 13, and an arithmetic processing unit 14 as main components.

  The input unit 11 is a part for inputting predetermined information. For example, a mouse, a keyboard, an input pen, or the like can be used. The predetermined information includes a screw diameter and length, a sheet metal thickness, a screw hole position, a bent portion of the sheet metal, and the like.

  The output unit 12 is a part that outputs (displays and prints) the three-dimensional model. For example, a display, a printer, or the like can be used.

  The storage unit 13 is a part for storing information such as databases and programs. The storage unit 13 stores a screw hole design program for embedding a three-dimensional model related to a screw hole in a three-dimensional model related to a sheet metal.

  The arithmetic processing unit 14 is a part that performs predetermined arithmetic processing for embedding the three-dimensional model related to the screw hole in the three-dimensional model related to the sheet metal based on the screw hole design program. The arithmetic processing unit 14 has a predetermined processing unit corresponding to a predetermined arithmetic processing. Refer to the operation of the design apparatus below for the operation of the arithmetic processing unit 14.

  Next, the operation of the design apparatus according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a flowchart schematically showing the operation of the design apparatus according to the first embodiment of the present invention. FIG. 3 is a perspective view schematically showing a three-dimensional model relating to a sheet metal before screw hole design by the design apparatus according to the first embodiment of the present invention. FIG. 4 is a perspective view schematically showing a three-dimensional model related to the sheet metal after the screw hole design by the design apparatus according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view schematically showing a three-dimensional model related to the sheet metal after the screw hole design by the design apparatus according to the first embodiment of the present invention.

  After designing a three-dimensional model (see FIG. 3) relating to a sheet metal not designed for screw holes, the design apparatus 10 starts up a screw hole design program by the operation of the designer (step A1).

  Next, the design apparatus 10 inputs the screw diameter (R1 in FIG. 5), the screw length (H1 in FIG. 5), and the sheet metal thickness (D in FIG. 5) by the designer. 5 (R1), the screw length (H1 in FIG. 5), and the sheet metal thickness (D in FIG. 5), the diameter of the screw hole (22 in FIG. 5) is calculated (step A2). The diameter of the screw hole (22 in FIG. 5) is calculated using a predetermined calculation formula on the screw hole design program.

  Next, in the design device 10, the position of the screw hole (22 in FIG. 5) and the bending portion (21 in FIG. 5) of the three-dimensional model related to the sheet metal (20 in FIG. 5) are input and designated by the designer. Then, the distance A (shortest distance) from the bent portion (21 in FIG. 5) to the center of the screw hole (22 in FIG. 5) is measured (step A3).

  After step A3 or step A6, the design apparatus 10 determines whether or not the measured distance A from the bent portion (21 in FIG. 5) to the center of the screw hole (22 in FIG. 5) is a predetermined distance or more. Determine (step A4). The predetermined distance is a distance determined according to the diameter of the screw (30 in FIG. 5) and the screw hole (22 in FIG. 5).

  When the distance is not greater than the predetermined distance (NO in step A4), the design apparatus 10 calculates and displays a region where screw holes cannot be arranged in the three-dimensional model related to the sheet metal (step A5). Thereby, the designer can input and specify the position of the screw hole in an area other than the area where the screw hole cannot be arranged. Here, an area where screw holes cannot be arranged is displayed, but an area where screw holes can be arranged may be displayed.

  After step A5, when the position of the screw hole is designated by the designer, the design apparatus 10 measures the distance A from the bent portion to the center of the screw hole (step A6). Then, it progresses to step A4.

  When the distance is equal to or greater than the predetermined distance (YES in step A4), the design apparatus 10 replaces the three-dimensional model related to the screw hole corresponding to the calculated screw hole diameter with the screw hole designated as input in the three-dimensional model related to the sheet metal. (Step A7). At this time, the height (H2 in FIG. 5) of the burring portion (23 in FIG. 5) is automatically given according to the three-dimensional model related to the screw hole.

  After step A7, the design apparatus 10 outputs a three-dimensional model (see FIG. 4) in which screw holes are embedded in the sheet metal (step A8). When outputting a three-dimensional model, it can be developed and output on a two-dimensional drawing used for parts ordering, and at that time, the previously input contents can be automatically displayed (printed).

  As described above, the effects described below are achieved in the first embodiment.

  The first effect is that it is possible to reduce the post-design return man-hours due to a simple design mistake. Considering the screw diameter, screw length, and sheet metal shape, the screw hole can be output with the proper screw diameter and screw hole position, so the number of man-hours to return after design due to a simple design error can be reduced. Further, when embedding screw holes in a sheet metal, it is possible to input and specify a screw hole position taking into consideration the necessity of a burring portion, a necessary distance from sheet metal bending, and the like.

  The second effect is that an appropriate design value is immediately calculated without the designer's calculation of the position / depth of the screw hole each time, so that design work efficiency can be improved.

  A design apparatus according to Embodiment 2 of the present invention will be described. In the second embodiment, an optimal screw material (for example, stainless steel) and a sheet metal material (for example, aluminum) in the first embodiment are input by inputting the material (for example, stainless steel) and the material for the metal plate (for example, aluminum). , Brass). Thereby, it is possible to design a screw hole according to the material.

It is the block diagram which showed typically the structure of the design apparatus which concerns on Example 1 of this invention. It is the flowchart which showed typically operation | movement of the design apparatus which concerns on Example 1 of this invention. It is the perspective view which showed typically the three-dimensional model which concerns on the sheet metal before designing a screw hole with the design apparatus which concerns on Example 1 of this invention. It is the perspective view which showed typically the three-dimensional model which concerns on the sheet metal after designing a screw hole with the design apparatus which concerns on Example 1 of this invention. It is sectional drawing which showed typically the three-dimensional model which concerns on the sheet metal after designing a screw hole with the design apparatus which concerns on Example 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Design apparatus 11 Input part 12 Output part 13 Memory | storage part 14 Arithmetic processing part 20 Sheet metal 21 Bending part 22 Screw hole 23 Burring part 30 Screw

Claims (15)

A design apparatus having an arithmetic processing unit for designing a three-dimensional model in which screw holes are embedded in a sheet metal,
The arithmetic processing unit includes:
A calculation processing unit that calculates the diameter of the screw hole according to the specified screw diameter, screw length, and sheet metal thickness,
A processing unit for measuring a distance from the bent portion to the screw hole center according to the input-designated position of the screw hole and the bent portion of the three-dimensional model related to the sheet metal;
A processing unit for determining whether the measured distance from the bent portion to the screw hole center is a predetermined distance or more;
A processing unit that embeds the three-dimensional model related to the screw hole corresponding to the calculated screw hole diameter at the position of the screw hole specified for input in the three-dimensional model related to the sheet metal when the distance is equal to or greater than the predetermined distance When,
The design apparatus characterized by having. The arithmetic processing unit includes:
When the predetermined distance is not more than the predetermined distance, in the three-dimensional model related to the sheet metal, a processing unit that calculates and displays a region where screw holes cannot be arranged, or a region where screw holes can be arranged, and
When a position of a new screw hole is designated as input, a processing unit that measures a distance from the bent portion to the center of the new screw hole,
The design apparatus according to claim 1, further comprising:   3. The design apparatus according to claim 1, wherein the arithmetic processing unit includes a processing unit that outputs a three-dimensional model in which screw holes are embedded in a sheet metal or a two-dimensional drawing developed from the three-dimensional model. .   When the three-dimensional model related to the screw hole is embedded in the three-dimensional model related to the sheet metal, the arithmetic processing unit adds the height of the burring portion to the sheet metal according to the three-dimensional model related to the screw hole. The design apparatus according to claim 1, further comprising a processing unit.   5. The processing unit according to claim 1, further comprising a processing unit that automatically sets an optimum screw material by inputting a material of a tool for machining the screw hole and a material of the sheet metal. The design apparatus as described in any one. A design method for designing a three-dimensional model in which a screw hole is embedded in a sheet metal,
A step of calculating the diameter of the screw hole according to the input screw diameter, screw length, and sheet metal thickness,
Measuring the distance from the bent portion to the screw hole center according to the input specified position of the screw hole and the bent portion of the three-dimensional model related to the sheet metal;
Determining whether the measured distance from the bent portion to the screw hole center is equal to or greater than a predetermined distance;
A step of embedding the three-dimensional model related to the screw hole corresponding to the calculated screw hole diameter in the position of the screw hole designated by the input in the three-dimensional model related to the sheet metal when the predetermined distance is not less than the predetermined distance; ,
The design method characterized by including. If it is not the predetermined distance or more, in the three-dimensional model related to the sheet metal, calculating and displaying a region where screw holes cannot be arranged, or a region where screw holes can be arranged;
When a position of a new screw hole is designated as input, a step of measuring a distance from the bent portion to the center of the new screw hole;
The design method according to claim 6, further comprising:   8. The design method according to claim 6, further comprising a step of outputting a three-dimensional model in which a screw hole is embedded in a sheet metal or a two-dimensional drawing developed from the three-dimensional model.   When embedding the three-dimensional model related to the screw hole in the three-dimensional model related to the sheet metal, a step of adding a height of a burring portion to the sheet metal according to the three-dimensional model related to the screw hole is included. The design method according to any one of claims 6 to 8.   The design according to any one of claims 6 to 9, further comprising a step of automatically setting an optimal screw material by inputting a material of a tool for machining the screw hole and a material of the sheet metal. Method. A program for designing a three-dimensional model in which screw holes are embedded in a sheet metal,
Calculating the diameter of the screw hole according to the input specified screw diameter, screw length and sheet metal thickness; and
Measuring the distance from the bent portion to the screw hole center according to the input-designated position of the screw hole and the bent portion of the three-dimensional model related to the sheet metal;
Determining whether the measured distance from the bent portion to the screw hole center is a predetermined distance or more;
A step of embedding the three-dimensional model related to the screw hole corresponding to the calculated screw hole diameter at the position of the screw hole designated by the input in the three-dimensional model related to the sheet metal when the predetermined distance is equal to or greater than the predetermined distance; ,
A program characterized by causing a design device to execute. If not more than the predetermined distance, in the three-dimensional model related to the sheet metal, calculating and displaying a region where screw holes cannot be arranged, or a region where screw holes can be arranged;
When a position of a new screw hole is designated as input, measuring a distance from the bent portion to the center of the new screw hole;
The program according to claim 11, wherein the program is executed by the design apparatus.   13. The program according to claim 11 or 12, wherein the design apparatus executes a step of outputting a three-dimensional model in which screw holes are embedded in a sheet metal or a two-dimensional drawing developed from the three-dimensional model.   When the three-dimensional model related to the screw hole is embedded in the three-dimensional model related to the sheet metal, a step of adding a height of a burring portion to the sheet metal according to the three-dimensional model related to the screw hole is added to the design apparatus. The program according to any one of claims 11 to 13, wherein the program is executed.   15. The step of automatically setting an optimum screw material by inputting a material of a tool for machining the screw hole and a material of the sheet metal is caused to be executed by the design apparatus. The program described in 1.

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