JP6897207B2 - Information processing equipment and information processing programs - Google Patents

Description

The present invention relates to an information processing device and an information processing program.

Patent Document 1 has an object of providing a mold design system capable of quickly determining an accurate parting line, and expresses a product shape in a mold design system for designing a mold for molding a product. A storage device that stores the three-dimensional graphic data, and plane projection data in which the edge of the product shape represented by the three-dimensional graphic data stored in the storage device is projected onto a plane perpendicular to the mold opening direction. Adjacent to the plane projection means to be created, the parting line storage means for storing the edge determined as the parting line as the confirmed parting line, and the confirmed parting line stored in the parting line storage means. Among the candidate edges, the candidate edge having the largest internal angle at the contact point with the confirmed parting line on the plane projection data is sequentially determined as a parting line and stored in the parting line storage means. The parting line determining means for determining the parting line of the mold for molding the product shape is provided, and the parting line determining means includes the confirmed parting line on the plane projection data. When the candidate edge having the largest internal angle at the contact point intersects with other candidate edges, if the number of intersections is even, the candidate edge having the largest internal angle is determined as a parting line, and the number of intersections is determined. It is disclosed that if is an odd number, another candidate edge that intersects the candidate edge having the largest internal angle is determined as a parting line.

In Patent Document 2, for example, in a mold for molding a molded product having a complicated undercut portion on the inner surface such as a rear cowl of a motorcycle, the equipment is simplified and at the same time, the operation of the undercut process is performed. At least the first and second direct push cores that restrain the inner surface of the molded product and can move in the mold clamping direction when the molded product is injection-molded, and the mold clamping direction. It is an injection molding die provided with one inclined core that can move diagonally with respect to the molded product, and the molded product has an undercut in at least three directions, and an inner mold is provided for each of the two opposite undercuts. The first direct push core corresponds to the inclined core, and the second direct push core corresponds to the remaining one-way undercut, and the first and second direct push cores correspond to each other. By engaging with the undercut, the molded product can be moved while being held, and the second direct push core that restrains the inner surface on one side of the molded product in the front-rear direction is only in the mold clamping direction. However, it is disclosed that the movement is also possible in the two opposite undercut directions.

Patent Document 3 has an object of providing a method for designing an injection-molded mold that enables a mold to be designed easily in a short time, and a control means controls a product shape or a mold shape. A correction step of correcting the product shape to a die-cuttable shape while displaying it on the screen, and the control means arranging the corrected product shape in the mold block displayed on the screen and in the mold block. A division step of providing a cavity corresponding to the product shape and then dividing the mold block into a core and a cavity, and the control means perform flow analysis of the resin of the mold on a perspective view of the mold viewed from the mold opening direction. The control means is designated in the division step, which includes a step of displaying the results in an overlapping manner and arranging a gas bend for removing the gas at a position where the resin finally reaches from the flow analysis result. It is disclosed that a step of creating a dividing surface by extending the dividing boundary line in parallel with a specified direction is included.

Patent Document 4 has an object of obtaining a parting line determination device capable of reducing the number of steps required for determining a parting line of a molded product and a parting line determination program, and each means for each surface of the molded product. Depending on the surface, the surface to be molded by the cavity mold, the surface to be molded by the core mold, the surface to be molded by the slide mold, the divided surface, or the absolute under surface is determined, and this information is sent to the parting line determining means. Upon input, the parting line determining means ends the process of determining the parting line by giving different color information to each surface and creating a parting line at the boundary of each surface based on this information. As described above, it is disclosed that the number of steps required to determine the parting line of the molded product can be reduced.

Patent Document 5 has an object of determining the surface of a molded product that cannot be molded without removing the mold, and calculates a normal at a point on each surface constituting the three-dimensional shape of the molded product. Whether the means and the normal calculated for each of the surfaces have a reverse component that is a directional component in the direction opposite to the die-cutting direction of the molded product, which is preset according to the surface. A reverse component determining means for determining whether or not, and a straight line extending from the projected surface in the die-cutting direction when the surface having the point where the normal having the normal is calculated is used as the projected surface. Reaching determination means for determining whether or not another surface reached by any of the straight lines extending in the opposite direction of the die-cutting direction is present in the molded product, and the straight line extending in the die-cutting direction from the projected surface and the straight line extending in the die-cutting direction. When there is another surface to which any of the straight lines extending in the opposite direction of the die-cutting direction reaches, it is impossible to determine that the projected surface cannot be molded only by moving the mold in the die-cutting direction. It is disclosed that the discriminating means and the display means for displaying the result discriminated by the non-moldable discriminating means are provided.

Patent Document 6 has an object of facilitating the design of a molded product or a mold without a non-moldable portion by automatically discriminating the presence or absence of a non-moldable portion with high accuracy and without skilled knowledge. A normal line calculation means for calculating the normal line of an arbitrary point on each surface constituting the shape, and the normal line is set in advance according to the surface in the die-cutting direction of the first mold of the molded product. A first reverse direction component determining means for determining whether or not a first reverse direction component which is a direction component opposite to a certain first die cutting direction is provided, and the normal line having the first reverse direction component A first non-moldable portion discriminating means for determining that the surface having the calculated points is a first non-moldable portion that cannot be molded only by moving the first mold in the first die-cutting direction, and the normal line. Is the second die-cutting direction as the die-cutting direction of the second mold corresponding to the first die, and is opposite to the second die-cutting direction which is the opposite direction of the first die-cutting direction. The surface having the second reverse direction component discriminating means for determining whether or not it has the second reverse direction component which is the direction component of the direction, and the point where the normal line having the second reverse direction component is calculated is described as described above. A second non-moldable portion determining means for determining that the second mold is a second non-moldable portion that cannot be molded only by moving the second mold in the second die-cutting direction, and the second non-moldable portion from the first non-moldable portion to the second die-cutting direction. When it is determined that there is a second projected straight line arrival determination means for determining whether or not there is a surface reached by the second die-cutting straight line extending to, and a surface reached by the second die-cutting straight line. A third mold that is from the first unmoldable portion to a third mold other than the first mold and the second mold, and is not in the first die-cutting direction and the second die-cutting direction. It is determined that there is a third projected straight line arrival determination means for determining whether or not there is a surface reached by the third die-cutting straight line extending in the punching direction, and a surface reached by the second die-cutting straight line. The first unmoldable portion determined to have a surface to which the third die-cutting straight line reaches cannot be molded even if the second die is moved in the second die-cutting direction, and the third die-cutting direction. Is a non-moldable portion that cannot be molded even if the mold is moved in the third die-cutting direction, and there is no surface on which the second die-cutting straight line extending from the first non-moldable portion reaches. The non-moldable portion discriminating means for determining that the first non-moldable portion and the standing wall adjacent to the first non-moldable portion and parallel to the second die-cutting straight line are not the non-moldable portions. A straight line in the first die-cutting direction extending in the first die-cutting direction reaches from the second unmoldable portion. When it is determined that there is a first projection straight line arrival determination means for determining whether or not a surface exists and a surface to which the first die-cutting straight line reaches, the second mold cannot be formed to the third mold. It is determined that there is the third projected straight line arrival determination means for determining whether or not there is a surface on which the third die-cutting straight line extending in the drawing direction reaches, and the surface on which the first die-cutting straight line reaches. Moreover, the second unmoldable portion determined to have a surface to which the third die-cutting straight line reaches cannot be molded even if the first die is moved in the first die-cutting direction. It is determined that the third mold is the non-moldable portion that cannot be molded even if the third mold is moved in the third die-cutting direction, and there is a surface on which the first die-cutting straight line extending from the second non-moldable portion reaches. If not, the non-moldable portion determines that the second non-moldable portion and the standing wall adjacent to the second non-moldable portion and parallel to the first die-cutting straight line are not the non-moldable portions. It is disclosed that the discriminant means is provided with a molded product display means for displaying each surface constituting the three-dimensional shape of the molded product and the non-moldable portion of the respective surfaces.

Japanese Patent No. 3497081 Japanese Patent No. 5336976 Japanese Patent No. 3833694 Japanese Patent No. 5013013 Japanese Patent No. 5621402 Japanese Patent No. 4623134

Conventionally, molds such as plastic parts have been designed. Then, in order to prevent the design from being redesigned, the parts where the type requirements may not be satisfied are extracted. In particular, there is a diagonal underside as a place where this failure may occur.
However, when it comes to visually judging the diagonal under, human judgment work is required, and there is a case of misunderstanding.
An object of the present invention is to provide an information processing device and an information processing program that make it easier to confirm an oblique underside as compared with the case of visually determining an oblique underside.

The gist of the present invention for achieving such an object lies in the inventions of the following items.
The invention of claim 1 extracts a specific means for specifying a slide range, an extraction means for extracting slide direction candidates within the range, and an inner under-candidate and an oblique under-candidate from the mold drawing information. and second extracting means, for each of the direction of the candidate, and calculation means for calculating the surface area in the range of surface area and oblique under candidate range inside under candidate, the range of the inner under candidate area and the oblique under candidate range by comparing the surface area, have a slant under extraction means for extracting a diagonal under, the calculating means, for each of the direction of the candidate, a surface area in the range free of obstructions on the extended line from the scope of the edges, the oblique under It is an information processing device that calculates the surface area in the range of.

The invention according to claim 2, wherein the oblique under extraction means, surface area in the range of the oblique under candidate is greater than the surface area in the range of the inner under candidate information according to claim 1 for extracting a diagonally under It is a processing device.

The invention according to claim 3, wherein the oblique under extraction means, surface area in the range of the oblique under candidate, if it is the same as the surface area in the range of the inner under candidate information processing according to claim 2 to be extracted as obliquely under It is a device.

The invention of claim 4 uses the computer as a specific means for specifying a slide range from mold drawing information, an extraction means for extracting slide direction candidates within the range, an inner under-candidate and an oblique under-candidate. A second extraction means for extracting the surface area, a calculation means for calculating the surface area of the inner under candidate range and the surface area of the diagonal under candidate range for each candidate in the above direction, and the surface area of the inner under candidate range and the diagonal under candidate. The surface area of the range is compared and functioned as an oblique under extraction means for extracting the oblique under , and the calculation means calculates the surface area of the range in which there is no obstacle on the extension line from the edge of the range for each candidate in the direction. , An information processing program that calculates the surface area in the diagonally under range.
The invention of claim 5 is a specific means for specifying a slide range from the drawing information of a mold, an extraction means for extracting candidates for a slide direction within the range, and an inner under-candidate for each candidate in the direction. It has a calculation means for calculating the surface area of the range of the diagonal under and the surface area of the range of the diagonal under candidate, and a diagonal under extraction means for extracting the diagonal under by comparing the surface area of the range of the inner under candidate and the surface area of the range of the diagonal under candidate. It is an information processing device.
The invention of claim 6 uses a computer for each of a specific means for specifying a slide range from mold drawing information, an extraction means for extracting slide direction candidates within the range, and each of the direction candidates. Diagonal under extraction to extract diagonal under by comparing the surface area of the inner under candidate range and the surface area of the diagonal under candidate range with the surface area of the inner under candidate range and the diagonal under candidate range. It is an information processing program for functioning as a means.

According to the information processing apparatus of claim 1, it is easier to confirm the diagonal under than in the case of visually determining the diagonal under.

According to the information processing apparatus of claim 2 , when the surface area in the diagonal under range is larger than the surface area in the inner under range, it can be extracted as diagonal under.

According to the information processing apparatus of claim 3 , when the surface area in the diagonal under range is the same as the surface area in the inner under range, it can be extracted as diagonal under.

According to the information processing program of claim 4 , it is easier to confirm the diagonal under than in the case of visually determining the diagonal under.
According to the information processing apparatus of claim 5, it is easier to confirm the diagonal under than in the case of visually determining the diagonal under.
According to the information processing program of claim 6, it is easier to confirm the diagonal under than in the case of visually determining the diagonal under.

It is a conceptual module configuration diagram about the configuration example of this embodiment. It is explanatory drawing which shows the system configuration example using this embodiment. It is a flowchart which shows the processing example by this embodiment. It is a flowchart which shows the processing example by this embodiment. It is explanatory drawing which shows the processing example by this embodiment. It is explanatory drawing which shows the processing example by this embodiment. It is explanatory drawing which shows the processing example by this embodiment. It is explanatory drawing which shows the processing example by this embodiment. It is explanatory drawing which shows the processing example by this embodiment. It is explanatory drawing which shows the processing example by this embodiment. It is a block diagram which shows the hardware configuration example of the computer which realizes this embodiment.

Hereinafter, an example of a preferred embodiment for realizing the present invention will be described with reference to the drawings.
FIG. 1 shows a conceptual module configuration diagram for a configuration example of the present embodiment.
The module generally refers to parts such as software (computer program) and hardware that can be logically separated. Therefore, the module in this embodiment refers not only to the module in the computer program but also to the module in the hardware configuration. Therefore, in the present embodiment, a computer program for functioning as those modules (a program for causing the computer to execute each procedure, a program for causing the computer to function as each means, and each function for the computer). It also serves as an explanation of the program), system and method for realizing the above. However, for convenience of explanation, words equivalent to "remember" and "remember" are used, but these words are stored in a storage device or stored when the embodiment is a computer program. It means that it is controlled so that it is stored in the device. Further, the modules may have a one-to-one correspondence with the functions, but in the implementation, one module may be configured by one program, a plurality of modules may be configured by one program, and conversely, one module may be configured. May be composed of a plurality of programs. Further, the plurality of modules may be executed by one computer, or one module may be executed by a plurality of computers by a computer in a distributed or parallel environment. In addition, one module may include another module. In addition, hereinafter, "connection" is used not only for physical connection but also for logical connection (data transfer, instruction, reference relationship between data, etc.). "Predetermined" means that it is determined before the target process, not only before the process according to the present embodiment starts, but also after the process according to the present embodiment starts. However, if it is before the target process, it is used with the intention that it is determined according to the situation / state at that time or according to the situation / state up to that point. When there are a plurality of "predetermined values", they may be different values, or two or more values (including all values, of course) may be the same. Further, the description "if A, do B" is used to mean "determine whether or not it is A, and if it is determined to be A, do B". However, this excludes cases where it is not necessary to determine whether or not it is A. Further, when a thing is listed such as "A, B, C", it is an example list unless otherwise specified, and includes a case where only one of them is selected (for example, only A).
In addition, a system or device is configured by connecting a plurality of computers, hardware, devices, etc. by communication means such as a network (including a one-to-one correspondence communication connection), and one computer, hardware, device, etc. It also includes cases where it is realized by such means. "Device" and "system" are used as synonymous terms. Of course, the "system" does not include anything that is nothing more than a social "mechanism" (social system) that is an artificial arrangement.
In addition, for each process by each module or when multiple processes are performed in the module, the target information is read from the storage device, and after the processes are performed, the process results are written to the storage device. is there. Therefore, the description of reading from the storage device before processing and writing to the storage device after processing may be omitted. The storage device here may include a hard disk, a RAM (Random Access Memory), an external storage medium, a storage device via a communication line, a register in a CPU (Central Processing Unit), and the like.

The information processing device 100 according to the present embodiment extracts diagonal underscores from the drawing information of the mold, and as shown in the example of FIG. 1, the drawing information receiving module 110, the slide range specifying module 120, and the sliding direction. It has an extraction module 130, an under extraction module 140, and an output module 180.
In the design of molded products such as plastics using a mold, it is necessary to check the requirements of the mold in order to avoid problems such as the mold not being able to be made. This type of requirement check reduces reliance on designer skills (understanding of mold characteristics), reduces rework (redesign) and variations in molding quality, and ultimately results in design quality. It can be improved.
The mold requirement check confirms the quality of the product design from the viewpoint of mass productivity etc. for the 3D model created at the time of product design. It is necessary to check undercuts, especially diagonal undercuts. Here, the undercut refers to a convex shape or a concave shape that cannot be released as it is when the molded product is taken out from the mold.

The drawing information receiving module 110 is connected to the slide range specifying module 120. The drawing information reception module 110 receives drawing information such as CAD (Computer-Aided Design). Here, the drawing information is information indicating the three-dimensional shape of the mold. Accepting drawing information means, for example, accepting drawing information generated by a user's operation (design work) such as a designer, or a hard disk (in addition to the one built in a computer, it is connected via a network). It includes reading out the drawing information stored in (including things) and the like. The drawing information to be accepted may be information on one drawing or information on a plurality of drawings.
As the "drawing information of the mold" received by the drawing information receiving module 110, drawing information for which undercut (diagonal undercut, inner undercut, and true undercut are mixed) has already been recognized may be used.
Here, the undercut portion of the molded product cannot be taken out because it is caught in the mold consisting of only the cavity (CAVITY, female mold) and the core (CORE, male mold) when the molded product is taken out. It is a part. The slide mechanism is a method of making these undercut portions removable from the mold.
The diagonal under portion is a portion that can be taken out by operating the slide core on the movable parting line surface by using the movement of opening and closing the mold by the angular pin provided diagonally on the fixed side of the mold. This is the most common slide mechanism, but the external dimensions of the mold are large.
The inner under portion is a portion that can be taken out by operating the slide by utilizing the projecting motion (elevating the ejector plate) of the molded product. When the molded product is projected, the inclined slide connected to the ejector plate projects diagonally with respect to the projecting direction of the molded product, but moves laterally with respect to the molded product, so that undercut can be processed. It can be used as a slide toward the inside of a molded product that cannot be handled by the slide core, but the mechanism is complicated and maintenance is difficult.

The slide range specifying module 120 is connected to the drawing information receiving module 110 and the slide direction extraction module 130. The slide range specifying module 120 specifies the slide range from the drawing information of the type received by the drawing information receiving module 110.
The slide direction extraction module 130 is connected to the slide range specifying module 120 and the under extraction module 140. The slide direction extraction module 130 extracts slide direction candidates within the range specified by the slide range specifying module 120.

The under extraction module 140 has an inner under surface area calculation module 150, an oblique under surface area calculation module 160, and an inner under / oblique under extraction module 170, and is connected to the slide direction extraction module 130 and the output module 180. ..
The inner under surface area calculation module 150 calculates the surface area in the inner under area for each direction candidate extracted by the slide direction extraction module 130.
Further, the surface area calculation module 150 for the inner under is calculated as the surface area of the inner under range for each direction candidate extracted by the slide direction extraction module 130, a range that cannot be processed by the cavity type and the core type constituting the mold. You may try to do it.
The diagonal under surface area calculation module 160 calculates the surface area in the diagonal under range for each direction candidate extracted by the slide direction extraction module 130.
Further, the surface area calculation module 160 for diagonal under is calculated as the surface area of the diagonal under range for each direction candidate in the range where there is no obstacle on the extension line from the edge of the range specified by the slide range specifying module 120. You may try to do it.

The inner under / diagonal under extraction module 170 compares the surface area of the inner under range calculated by the inner under surface area calculation module 150 with the surface area of the diagonal under range calculated by the diagonal under surface area calculation module 160. Extract diagonal under.
Further, the inner under / oblique under extraction module 170 may extract as an oblique under when the surface area in the oblique under range is larger than the surface area in the inner under range.
Further, the inner under / oblique under extraction module 170 may extract as an oblique under when the surface area in the oblique under range is the same as the surface area in the inner under range.
Further, the inner under / diagonal under extraction module 170 compares the surface area of the inner under range calculated by the inner under surface area calculation module 150 with the surface area of the diagonal under range calculated by the diagonal under surface area calculation module 160. The inner underside may be extracted.
Further, the inner under / diagonal under extraction module 170 may extract as the inner under when the surface area of the inner under range is larger than the surface area of the diagonal under range.

The output module 180 is connected to the under extraction module 140. The output module 180 outputs the diagonal under information extracted by the inner under / diagonal under extraction module 170. The output of diagonally under information may include, for example, output as a 3D (Dimations) image in addition to display on a display device such as a liquid crystal display, and further, printing on a printing device such as a printer or a speaker. The output of the sound by the sound output device such as the above, vibration, and the like may be combined, and storage in a storage medium such as a memory card, passing to another information processing device, and the like may be included.

FIG. 2 is an explanatory diagram showing an example of a system configuration using the present embodiment.
The information processing device 100, the CAD device 200, the user terminal 210A, and the user terminal 210B are each connected via a communication line 290. The communication line 290 may be wireless, wired, or a combination thereof, and may be, for example, the Internet as a communication infrastructure, an intranet, or the like. Further, the function of the information processing device 100 may be realized as a cloud service.
For example, a user who is a designer creates a design drawing of a mold by using a CAD device 200 via a user terminal 210. Then, the drawing information which is the design drawing is stored in the CAD device 200. The user requests the requirement check of the designed type by using the information processing apparatus 100 via the user terminal 210. The information processing device 100 takes out the drawing information in the CAD device 200, performs an oblique under extraction process, and presents the extraction result to the user. Further, the inner under extraction process may be performed and the extraction result may be presented to the user.

FIG. 3 is a flowchart showing a processing example according to the present embodiment.
In step S302, cavity / core division is performed. The three-dimensional shape of the target mold is divided into a mold cavity (CAVITY, female type) and a core (CORE, male type).
In step S304, the slide of the mold is extracted from the three-dimensional shape of the target mold.
In step S306, the cavity / core / slide division is performed using the processing results of steps S302 and S304.
For the processes from step S302 to step S306, existing techniques (for example, Patent Document 4, Patent Document 5, Patent Document 6, etc.) may be used. By these processes, the three-dimensional shape of the target mold is divided into a cavity, a core, and a slide of the mold. At this point, the slide may contain undercuts. However, the undercut here includes a mixture of diagonal undercuts, inner undercuts, and true undercuts.

In step S308, the inner under / diagonal under is extracted. The detailed processing of step S308 will be described later using the flowchart shown in the example of FIG.
In step S310, the true under is extracted. The inner undercut and the diagonal undercut may be removed from the undercut to make it a true undercut. In other words, the part that cannot be dealt with even under the inside and cannot be dealt with even under the diagonal is the true under.

FIG. 4 is a flowchart showing a processing example according to the present embodiment.
In step S402, the slide range is recognized from the result (undercut check result) of the processes from step S302 to step S306.
For example, as shown in FIG. 5A, a slide range 520, a slide range 530, a slide range 540, and a slide range 550 are extracted from the molded product 500. An enlarged drawing of the slide range 530 in the region of interest 510 is shown in the example of FIG. 5 (b). There is a slide range 530 as a part other than the cavity and the core.
As shown in the example of FIG. 6, in the plan view of the molded product 600, the surface 612, the surface 614, the surface 616, the surface 622, the surface 624, and the surface 626 are the slide ranges. Here, the surface 612, the surface 614, and the surface 616 are slide under surfaces, and the surface 622, the surface 624, and the surface 626 are inner under surfaces.

In step S404, candidates for the following slide directions are extracted within the range based on the processing result of step S402.
(1) Normal direction of the surface (2) Center direction of the opposing surfaces (3) Axial direction of the cylinder (4) ± XY direction (5) Edge direction In the case of an inner slide, the Z direction is vector 0.

Each direction (1) to (5) will be described with reference to the example of FIG.
(1) As shown in the example of FIG. 7A, the "normal direction of the surface" corresponds to the slide direction candidate 712 with respect to the surface 710. Of course, the opposite direction of the slide direction candidate 712 is also included.
(2) As shown in the example of FIG. 7B, the "center direction of the facing surfaces" corresponds to the slide direction candidate 722, which is the direction guided by the inner product calculation of the normals of the surfaces of the facing surfaces 720a and 720b. To do. Of course, the opposite direction of the slide direction candidate 722 is also included.
(3) As shown in the example of FIG. 7 (c), the "axial direction of the cylinder" corresponds to the slide direction candidate 732 which is a radiation line on the bottom surface or the upper surface (the surface which is not the curved surface of the side surface) of the cylinder 730. Of course, the opposite direction of the slide direction candidate 732 is also included.
(4) The "± XY direction" is the direction of the X-axis and the Y-axis in the plane determined by the X-axis and the Y-axis in the three-dimensional space.
(5) As shown in the example of FIG. 7A, the “edge direction” corresponds to the slide direction candidate 752 with respect to the edge 750. Of course, the opposite direction of the slide direction candidate 752 is also included. The edge refers to the intersection of the faces.

In step S406, the under amount in the direction extracted in step S404 is calculated. The under amount is the distance between the cavity and the core that cannot be processed by the core. This process is for determining whether or not it becomes an inner under candidate. The process of step S406 will be described with reference to the examples of FIGS. 8 and 9.
A beam is emitted from a point on the edge of the slide range in the above-mentioned five directions, and a portion where the beam satisfies the following conditions is a candidate for inner under. Here, "flying a beam" is to draw a straight line perpendicular to the target surface in three-dimensional space, which is performed by vector calculation in three dimensions.
(A) There is no obstacle in the range of the under amount.
For example, as shown in FIG. 8A, since there is no other portion (a portion that hinders taking out the mold) in the range of the under amount 810 in the molded product 800, it is an inner under. If there is an obstacle, it will be true under.
(B) There is a shape outside of you, but the distance to it is long.
For example, as shown in FIG. 8B, since the distance 860 with respect to the left side of the molded product 850 is long, it is a candidate for inner under. Here, "the distance is long" is determined by comparison with a predetermined threshold value. As the "predetermined threshold value", for example, there is a value determined by using the under amount (A times or more of the under amount, etc.).
As shown in the example of FIG. 9, the beam is blown from the surface determined by the points 902 to 912 to determine whether there is an obstacle in the range of the under amount, and if not, it is a candidate for the inner under.
In step S408, the surface area of the portion that is a candidate for the inner underside in step S406 is calculated.

In step S410, a portion that can be processed as an oblique under is extracted for each direction extracted in step S404. This process is for determining whether or not the candidate is a diagonal under candidate. The process of step S410 will be described with reference to the example of FIG.
When the range of the slide recognized in step S402 is not an obstacle in the above-mentioned five directions, it is a candidate for diagonal under.
For example, as shown in FIG. 10, a beam is blown from a point on the edge of the slide range to check for obstacles. The range without obstacles is a candidate for diagonal under. Specifically, in the molded product 1000, when the beam 1015 is blown in the direction of the edge 1010, there is no obstacle, but when the beam 1025 is blown in the direction of the edge 1020, there is an obstacle, so it is a candidate for diagonal under. It doesn't become.
In step S412, the surface area of the portion that is a candidate for diagonal under is calculated.

In step S414, it is determined which surface area is larger, and if the inner underside has more treatable surfaces, the process proceeds to step S416, and if the diagonal underside has more treatable surfaces, the process proceeds to step S418.
In step S416, it is determined that the inside is under.
In step S418, it is determined that it is diagonally under.

As illustrated in FIG. 11, the hardware configuration of the computer on which the program as the present embodiment is executed is a general computer, specifically, a personal computer, a computer that can be a server, and the like. That is, as a specific example, the CPU 1101 is used as the processing unit (calculation unit), and the RAM 1102, ROM 1103, and HD 1104 are used as the storage device. As the HD1104, for example, a hard disk or SSD (Solid State Drive) may be used. Drawing information reception module 110, slide range specification module 120, slide direction extraction module 130, under extraction module 140, inner under surface surface calculation module 150, diagonal under surface area calculation module 160, inner under / diagonal under extraction module 170, output module A CPU 1101 that executes a program such as 180, a RAM 1102 that stores the program and data, a ROM 1103 that stores a program and the like for starting the computer, and an auxiliary storage device that stores drawing information, processing results, and the like ( For user operations (including movement, voice, line of sight, etc.) on the HD1104, which is (may be a flash memory, etc.), keyboard, mouse, touch screen, microphone, camera (including line-of-sight detection camera, etc.), etc. A reception device 1106 that accepts data based on this, an output device 1105 such as a CRT, a liquid crystal display, and a speaker, a communication line interface 1107 for connecting to a communication network such as a network interface card, and data exchange by connecting them. It is composed of a bus 1108 for the purpose of doing so. A plurality of these computers may be connected to each other by a network.

Among the above-described embodiments, in the case of a computer program, the system of the present hardware configuration is made to read the computer program which is software, and the software and the hardware resources cooperate with each other to carry out the above-described embodiment. Is realized.
The hardware configuration shown in FIG. 11 shows one configuration example, and the present embodiment is not limited to the configuration shown in FIG. 11, and the module described in the present embodiment can be executed. All you need is. For example, some modules may be configured with dedicated hardware (for example, Applied Special Integrated Circuit (ASIC), etc.), and some modules are in an external system and connected by a communication line. Further, a plurality of systems shown in FIG. 11 may be connected to each other by a communication line so as to cooperate with each other. In addition to personal computers, mobile information and communication devices (including mobile phones, smartphones, mobile devices, wearable computers, etc.), home information appliances, robots, copiers, fax machines, scanners, printers, multifunction devices (scanners, printers, etc.) It may be incorporated in an image processing device) having any two or more functions such as a copying machine and a fax machine.

In addition, in the comparison process in the description of the above-described embodiment, "greater than or equal to", "less than or equal to", "greater than", and "less than (less than)" are used as long as the combination does not conflict. They may be "greater than", "less than (less than)", "greater than or equal to", and "less than or equal to", respectively.

The described program may be stored in a recording medium and provided, or the program may be provided by a communication means. In that case, for example, the program described above may be regarded as an invention of "a computer-readable recording medium on which the program is recorded".
The "computer-readable recording medium on which a program is recorded" means a computer-readable recording medium on which a program is recorded, which is used for program installation, execution, program distribution, and the like.
The recording medium is, for example, a digital versatile disc (DVD), which is a standard established by the DVD Forum "DVD-R, DVD-RW, DVD-RAM, etc." and DVD + RW. Standards such as "DVD + R, DVD + RW, etc.", compact discs (CD), read-only memory (CD-ROM), CD recordable (CD-R), CD rewritable (CD-RW), etc., Blu-ray discs (CD-RW) Blu-ray (registered trademark) Disc), optical magnetic disk (MO), flexible disk (FD), magnetic tape, hard disk, read-only memory (ROM), electrically erasable and rewritable read-only memory (EEPROM (registered trademark)) )), Flash memory, random access memory (RAM), SD (Secure Digital) memory card and the like.
Then, the whole or a part of the program may be recorded on the recording medium and stored, distributed, or the like. Also, by communication, for example, a wired network used for a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), the Internet, an intranet, an extranet, or wireless communication. It may be transmitted using a transmission medium such as a network or a combination thereof, or may be carried on a carrier.
Further, the program may be a part or all of other programs, or may be recorded on a recording medium together with a separate program. Further, the recording may be divided into a plurality of recording media. Further, it may be recorded in any mode as long as it can be restored, such as compression and encryption.

100 ... Information processing device 110 ... Drawing information reception module 120 ... Slide range specification module 130 ... Slide direction extraction module 140 ... Under extraction module 150 ... Inner under surface area calculation module 160 ... Diagonal under surface area calculation module 170 ... Inner under / diagonal Under extraction module 180 ... Output module 200 ... CAD device 210 ... User terminal 290 ... Communication line

Claims (6)

Specific means to identify the range of the slide from the drawing information of the type,
An extraction means for extracting slide direction candidates within the above range, and
A second extraction means for extracting inner under-candidates and diagonal under-candidates,
A calculation means for calculating the surface area of the inner under candidate range and the surface area of the diagonal under candidate range for each candidate in the above direction.
By comparing the surface area in the range of surface area and oblique under candidate range inside under candidate, have a slant under extraction means for extracting a diagonal under,
The calculation means calculates the surface area of the range where there is no obstacle on the extension line from the edge of the range as the surface area of the diagonally under range for each candidate in the direction.
Information processing device. The information processing apparatus according to claim 1, wherein the diagonal under extraction means extracts as an oblique under when the surface area of the diagonal under candidate range is larger than the surface area of the inner under candidate range. The information processing apparatus according to claim 2 , wherein the diagonal under extraction means extracts as an oblique under when the surface area of the diagonal under candidate range is the same as the surface area of the inner under candidate range. Computer,
Specific means to identify the range of the slide from the drawing information of the type,
An extraction means for extracting slide direction candidates within the above range, and
A second extraction means for extracting inner under-candidates and diagonal under-candidates,
A calculation means for calculating the surface area of the inner under candidate range and the surface area of the diagonal under candidate range for each candidate in the above direction.
By comparing the surface area of the range of the inner under candidate and the surface area of the range of the diagonal under candidate , it functions as a diagonal under extraction means for extracting the diagonal under .
The calculation means calculates the surface area of the range where there is no obstacle on the extension line from the edge of the range as the surface area of the diagonally under range for each candidate in the direction.
Information processing program. Specific means to identify the range of the slide from the drawing information of the type,
An extraction means for extracting slide direction candidates within the above range, and
A calculation means for calculating the surface area of the inner under candidate range and the surface area of the diagonal under candidate range for each candidate in the above direction.
An information processing device having a diagonal under extraction means for extracting a diagonal under by comparing the surface area of the range of the inner under candidate with the surface area of the range of the diagonal under candidate. Computer,
Specific means to identify the range of the slide from the drawing information of the type,
An extraction means for extracting slide direction candidates within the above range, and
A calculation means for calculating the surface area of the inner under candidate range and the surface area of the diagonal under candidate range for each candidate in the above direction.
An information processing program that compares the surface area of the inner under candidate range with the surface area of the diagonal under candidate range and functions as a diagonal under extraction means for extracting diagonal under.

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