WO2020241676A1

WO2020241676A1 - Three-dimensional model recovery system, three-dimensional model recovery method, inspection device, and program

Info

Publication number: WO2020241676A1
Application number: PCT/JP2020/020892
Authority: WO
Inventors: 龍岡田
Original assignee: 三菱電機株式会社
Priority date: 2019-05-28
Filing date: 2020-05-27
Publication date: 2020-12-03
Also published as: JPWO2020241676A1; JP7337154B2

Abstract

This three-dimensional model recovery system (1) is provided with an expanded data recovery part (2) and a three-dimensional model recovery part (3). The expanded data recovery part (2) is provided with: a punching NC data analysis part (21) which creates punching information (200) from the punching NC data (120); a die layout part (22) which creates a die layout view (29) on the basis of the punching information (200); and an expanded data creation part (23) which creates expanded data (28a) on the basis of the die layout view (29). A three-dimensional mode recovery part (3) is provided with: a bending NC data analysis part (31) which creates bending information (300) from bending NC data (130); a bending information combination part (33) which combines the bending information (300) and a curve with the expanded data (28a); and a three-dimensional model creation part (34) which creates a three-dimensional model on the basis of the expanded data (28b) to which the bending information (300) and the curve are imparted.

Description

3D model restoration system, 3D model restoration method, inspection equipment and programs

This disclosure relates to a 3D model restoration system, a 3D model restoration method, an inspection device, and a program.

CAD (Computer Aided Design) is usually used for product design. By utilizing the CAD data of the three-dimensional completed shape model designed using this CAD, the work from design to manufacturing and inspection is rationalized.

For example, Patent Document 1 discloses a three-dimensional object inspection device. This three-dimensional object inspection device identifies the inspection object by comparing the design data created by CAD with the measurement data of the inspection object, and uses the inspection method assigned to the identified inspection object to inspect the inspection object. Inspect.

Japanese Unexamined Patent Publication No. 7-98217

By the way, at the sheet metal processing site, a molded product is obtained in the next process. First, a development drawing is created from the three-dimensional completed shape model represented by the design data created by CAD. After that, NC (Numerical Control) data for performing punching, bending, etc. is created based on the developed view. Based on the created NC data, the sheet metal is actually machined with an NC machine tool to obtain a molded product. After that, the appearance of the molded product is inspected.

NC data is created in consideration of processing conditions. For example, when the NC data creator cannot process the workpiece according to the shape specified in the design drawing, the NC data creator inquires to the designer, changes the mold specified in the design data to another mold, and NC data. May be created. Therefore, there may be a difference between the shape of the molded product and the finished shape at the design stage until the designer issues the revised design drawing.

On the other hand, the three-dimensional object inspection device described in Patent Document 1 automatically inspects a molded product based on design data. Therefore, if there is a difference between the shape of the molded product and the finished shape based on the design data, the inspection by the three-dimensional object inspection device cannot be performed. In this case, the designer has to wait for the inspection until the finished shape model is redesigned, or manually confirm whether or not the molded product is actually processed according to the developed view.

In this way, if there is a difference between the finished shape based on the design data and the shape of the actually manufactured molded product, the CAD data at the design stage may not be effectively used for rationalization of work.

The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to make it possible to generate a three-dimensional model closer to an actual molded product.

In order to achieve the above object, the three-dimensional model restoration system according to the present disclosure is based on an expansion data restoration unit that creates expansion data based on punching NC data, and bending NC data and expansion data. It includes a three-dimensional model restoration unit that creates a three-dimensional model. The unfolding data restoration unit creates punching processing information from the punching NC data, creates a mold layout drawing in which the punching die is arranged at the coordinate position based on the punching machining information, and develops based on the die layout drawing. Create data. The 3D model restoration unit creates bending information from the bending NC data, combines the bending information and the bending line with the expansion data, and based on the expansion data to which the bending information and the bending line are given. Create a 3D model.

According to the present disclosure, development data of a molded product is created from punching NC data, and a three-dimensional completed shape model is created based on bending NC data and restored development data. Since a three-dimensional model is generated from NC data for controlling an NC machine tool, it is possible to generate a three-dimensional model closer to an actual molded product. Therefore, for example, if the obtained 3D model is used in the inspection process of the molded product, the 3D measuring machine data of the molded product and the 3D model can be automatically compared, and the NC data creator intentionally changed it. It is possible to reduce the number of steps to manually reconfirm the difference in shape.

The figure which shows the physical structure of the 3D model restoration system which concerns on embodiment of this disclosure. Functional configuration diagram of the 3D model restoration system according to the embodiment of the present disclosure The figure explaining the process of sheet metal processing including the 3D model restoration processing which concerns on embodiment of this disclosure. The figure explaining the process performed by the punching NC data analysis unit shown in FIG. The figure explaining the process performed by the bending NC data analysis part shown in FIG. The figure which shows an example of the bending elongation value master in embodiment Explanatory drawing of the mold arrangement diagram created by the mold arrangement part shown in FIG. The figure explaining the expansion data restoration processing performed by the expansion data restoration part shown in FIG. Explanatory drawing of the direction of the bending line with respect to the machining origin performed by the flow direction reference correction unit shown in FIG. Explanatory drawing of the process of drawing a bending line performed by the bending information coupling part shown in FIG. The figure which illustrates the environment where the 3D model restoration system which concerns on embodiment of this disclosure is used.

Hereinafter, the three-dimensional model restoration system, the three-dimensional model restoration method, and the program according to the embodiment of the present disclosure will be described with reference to the drawings.

The three-dimensional model restoration system 1 according to the present embodiment is a molded product that is actually molded in consideration of the influence of punching and bending from NC (Numerical Control) data of punching and bending. It is a system that restores a 3D model. In the present disclosure, restoration means generating development data and a three-dimensional model corresponding to a molded product that is actually molded. Here, the NC data is numerical data that specifies a tool to be used, a coordinate position where the tool moves, a speed, and the like in order to control the operation of the machine tool. The NC data is created by adding the machining conditions to the three-dimensional model created by CAD based on the development drawing data created in consideration of the bending elongation value generated by the bending process.

Punching NC data is input to machine tools that perform punching such as outer shape punching to create the contour shape of the molded product, hole punching to form a hole, and molding to plastically deform the area around the hole to create a burring shape. It is NC data. The bending NC data is NC data input to the machine tool that performs the bending.

The 3D model restoration system 1 is used in a manufacturing environment as illustrated in FIG. 11, for example. In FIG. 11, the manufacturing system 400 includes a punching machine tool 410 and a bending machine tool 420, and processes a workpiece to manufacture a molded product. NC data is supplied to the manufacturing system 400. The NC data is originally generated according to the specifications specified by the design information. However, if it is set in advance, such as when it cannot be manufactured with the specifications as specified in the design information, it is generated with specifications different from the specifications specified in the design information.

The punching machine tool 410 is subjected to outer shape punching to create the contour shape of the molded product, hole punching to form a hole, and plastic deformation to form a burring shape around the hole according to the punching NC data included in the NC data. Perform punching such as machining on the work.

The bending machine tool 420 is a machine tool that bends a workpiece at a specified position in a specified direction and at a specified angle according to the bending NC data included in the NC data.

The measuring device 430 is a device that measures the dimensions, shape, etc. of the molded product manufactured by the manufacturing device.

The inspection device 440 compares the three-dimensional model of the molded product with the measurement data output by the measuring device 430, and determines the quality of the molded product manufactured by the manufacturing system 400. When the NC data is generated with the specifications according to the design information, the inspection device 440 uses the three-dimensional model of the molded product generated based on the specifications specified in the setting data as the criterion for quality judgment. When the NC data is generated with specifications different from the design information, the three-dimensional model restoration system 1 uses the three-dimensional model generated based on the NC data as a criterion for quality determination.

Next, the physical configuration of the three-dimensional model restoration system 1 will be described with reference to FIG.

The three-dimensional model restoration system 1 is a general-purpose computer, and includes a CPU (Central Processing Unit) 11, a storage unit 12, a communication unit 13, and an input / output unit 14. The CPU 11, the storage unit 12, the communication unit 13, and the input / output unit 14 are connected to each other via the internal bus 99.

The CPU 11 executes various processes described later by executing the program stored in the non-volatile memory of the storage unit 12 using the volatile memory as a work area.

The storage unit 12 includes a volatile memory and a non-volatile memory. The volatile memory is used as a work area of the CPU 11, and the non-volatile memory stores a program executed by the CPU 11.

The communication unit 13 connects the 3D model restoration system 1 to the CAD system 60 and the database 40 via the network 110. The CAD system 60 is a system that generates design data of a molded product. The database 40 will be described later.

The input / output unit 14 is connected to the display device 50, the input device 51, the output device 52, and the external storage device 53. The display device 50 is a user interface that displays the information generated by the three-dimensional model restoration system 1. The input device 51 is a user interface including an information input device such as a keyboard and a mouse. The output device 52 includes a printing device and prints the information generated by the three-dimensional model restoration system 1 on a paper medium. The external storage device 53 includes a hard disk drive device, a solid state drive device, and the like, and stores information and the like generated by the three-dimensional model restoration system 1. The database 40 may be arranged in the external storage device 53.

Next, the functional configuration of the three-dimensional model restoration system 1 will be described with reference to FIG.

As described above, the 3D model restoration system 1 restores or restores the 3D data of the 3D model of the actually molded molded product from the NC data for sheet metal processing, considering the effects of punching and bending. It is a system to generate. The punching NC data 120 and the bending NC data 130 are supplied to the three-dimensional model restoration system 1 as NC data for sheet metal processing.

Punching NC data 120 is numerical data that specifies a machining order, a die ID, a machining position coordinate position, a punching speed, etc. in order to control the operation of a machine tool in relation to punching for removing a part of a work. The punching NC data 120 is created from the developed view data 28 by CAM (Computer Aided Manufacturing) software, NC data creation software, etc., in consideration of the machining conditions of the punching process. The development drawing data 28 is generated from the design information 10 generated by the CAD system 60, that is, the three-dimensional design data in consideration of the elongation value indicating the magnitude of the elongation due to the bending process, and represents the development drawing of the molded product. It is data. As illustrated in FIG. 4, the punching NC data 120 includes machining order, identification information of dies used for punching (hereinafter, simply ID), coordinate information of machining position, punching speed, ID of machining type, and the like. Includes information about.

On the other hand, in the bending NC data 130, regarding the bending process of bending the work, in order to control the operation of the machine tool, the machining order, the NC code of the die to be used, the position coordinates of the die, and the bending based on the machining origin are used as reference. It is numerical data that specifies the direction, bending angle, etc. The position coordinates of the mold include the position coordinates of the machining start point (Xs, Ys) and the position coordinates of the machining end point (Xe, Ye). The bending NC data 130 is created based on the development drawing data 28 by the CAM software, the NC data creation software, etc., taking into account the processing conditions of the bending. As illustrated in FIG. 5, the bending NC data 130 includes information such as an ID of a bending die used for bending, coordinate information of a processing position, a bending angle, and a bending direction with respect to a processing origin.

The three-dimensional model restoration system 1 is a sheet metal product based on the expansion data restoration unit 2 that restores the development data 28a of the sheet metal product based on the punching NC data 120, and the restored expansion data 28a and the bending NC data 130. The three-dimensional model restoration unit 3 for restoring the three-dimensional model of the above is provided.

The database 40 connected to the three-dimensional model restoration system 1 includes a punching die master 140, a bending die master 150, a bending elongation value master 160, a punching tolerance table 170, a bending tolerance table 180, and a molding processing shape. It has a master 190.

As illustrated in FIG. 4, the punching die master 140 stores specification information of the punching die used for punching. The specification information includes, for example, information such as the model number of the punching die, the die ID, the shape and dimensions of the punching die, and the processing type of the processing performed using the punching die.

As illustrated in FIG. 5, the bending die master 150 stores specification information of the bending die used for bending. The specification information includes, for example, a mold ID, an NC code, a die V width, a bending radius R, and a processing type.

As illustrated in FIG. 6, the bending elongation master 160 stores the elongation value according to the material and plate thickness of the work, the model number of the mold to be used, and the bending angle.

The punching tolerance table 170 stores the tolerance for each punching process. The bending tolerance table 180 stores the tolerance for each bending process. The molding processing shape master 190 stores the type of molding processing and the three-dimensional shape obtained by the molding processing in association with each other.

The development data restoration unit 2 shown in FIG. 2 includes a punching NC data analysis unit 21 that analyzes the punching NC data 120 to create punching processing information 200, and a die arrangement diagram 29 in which the punching die is arranged on the work. A mold arranging unit 22 for drawing the above and a development data creating unit 23 for creating the development data 28a of the molded product are provided.

The punching NC data analysis unit 21 searches the punching die master 140 using the die ID included in the punching NC data 120 shown in FIG. 4 as a key, and specifies the specifications of the punching die used for the punching. Is extracted. Further, the punching NC data analysis unit 21 extracts information necessary for creating the development data 28a from the punching NC data 120 shown in FIG. 4, for example, information such as the coordinates of the machining position and the type of machining. .. The punching NC data analysis unit 21 integrates information such as mold specification information, machining position coordinates, and machining type to generate punching information 200 illustrated in FIG. As an example, the punching processing information 200 includes information such as a processing order, a mold model number, a processing type, a mold shape and dimensions, and processing position coordinates.

The die arranging unit 22 shown in FIG. 2 is placed on the work based on the processing position coordinates, the shape of the die, the dimensions of the die, etc. included in the punching processing information 200 created by the punching NC data analysis unit 21. A process of creating a die arrangement diagram 29 in which the punching die is arranged is performed. An example of the mold arrangement FIG. 29 is shown in FIG. This die arrangement diagram shows a state in which the outer shape punching die 25a and the three hole punching dies 25b are arranged on the rectangular work 24 in a plan view.

The development data creation unit 23 shown in FIG. 2 performs a process of creating development data 28a of the molded product based on the mold arrangement drawing 29 created by the mold arrangement unit 22. The development data creation unit 23 draws an outline drawing unit 231 that draws an outline drawing showing the outer shape of the molded product formed by the outer shape punching process, and a hole shape drawing showing the shape of the hole formed by the hole processing. It includes a hole shape drawing unit 232 and a molding processing information coupling unit 233 that binds molding processing information including a molding processing type, molding shape, etc. to the development data 28a.

As illustrated in FIG. 8, the outline drawing unit 231 performs the outline drawing process S301 for drawing the outline 26 on the mold arrangement drawing 29 created by the mold arrangement unit 22. The outer line 26 is a line representing the outer shape of the molded product formed by the outer shape punching process. Specifically, the outline drawing unit 231 draws the inner contour line of the closed area formed by the outer shape punching die 25a used for the outer shape punching process as the outer line 26 in the die layout drawing 29. Perform processing.

As shown in FIG. 8, the hole shape drawing unit 232 performs the hole shape drawing process S302 for drawing the hole shape line 27 on the mold layout drawing 29 in which the outline line 26 is drawn by the outline drawing unit 231. Specifically, the hole shape drawing unit 232 draws the outer circumference of the hole punching mold 25b used for hole drilling arranged in the mold arrangement drawing 29 as the hole shape line 27 in the mold arrangement drawing 29. If there are a plurality of hole shape lines 27, all the hole shape lines 27 are drawn.

The molding processing information coupling unit 233 creates development data 28a representing a two-dimensional development drawing of the molded product by punching based on the drawn outline 26 and hole shape line 27. Further, the molding processing information coupling unit 233 adds the molding processing information coupling process S303 that adds the molding processing information 30 such as the identification number of the molding die, the processing position coordinates, the type of molding processing, and the dimensions to the created development data 28a. Do. The molding process includes burring process, tap process, and the like, but the two-dimensional development data 28a cannot show the three-dimensional molding shape formed by the molding process. Therefore, a form in which the molding processing information 30 is added to the development data 28a is adopted. The molding processing information 30 is used by the three-dimensional model restoration unit 3 described later to restore the three-dimensional molding shape.

Next, the functional configuration of the three-dimensional model restoration unit 3 shown in FIG. 2 will be described.

The three-dimensional model restoration unit 3 is defined by a bending NC data analysis unit 31 that analyzes bending NC data 130 and creates bending information 300, and a punching NC data 120 and a bending NC data 130, respectively. A flow direction reference correction unit 32 that matches the machining origins, a bending information coupling section 33 that adds bending information 300 and bending lines to the development data 28a, and a 3D model creation section 34 that creates a 3D model. , Equipped with.

The bending NC data analysis unit 31 refers to the bending die master 150 using the mold ID included in the bending NC data 130 shown in FIG. 5 as a key, and the specifications of the bending die used for the bending. Get information. Further, the bending NC data analysis unit 31 extracts processing information necessary for restoring a three-dimensional model from the bending NC data 130, for example, processing information such as bending order, processing position coordinates, and bending angle of bending. .. The bending NC data analysis unit 31 integrates these data to create the bending information 300 illustrated in FIG. The bending processing information 300 includes information necessary for restoring the three-dimensional model, for example, bending die information, bending order of bending processing, start point coordinates and end point coordinates of the processing position, bending angle, and the like.

The flow direction reference correction unit 32 shown in FIG. 2 compares the coordinate values of the respective machining origins defined in the punching NC data 120 and the bending NC data 130, and if the coordinate values of the machining origins are different, the bending machining is performed. A process of extracting the processing position coordinate value of the information 300 and making a correction to match the processing origin of the processing NC data 120 is performed.

Specifically, in the punching NC data 120 and the bending NC data 130, the respective machining origins are defined by setting the distance from the machine origin of the machine tool in advance. When the machining origins of the punching NC data 120 and the bending NC data 130 are different, it becomes necessary to unify the coordinate system. Therefore, the flow direction reference correction unit 32 sets the value of the distance from the machine origin defined as the machining origin in the punching NC data 120 and the value of the distance from the machine origin defined as the machining origin in the bending NC data 130. Extract. The flow direction reference correction unit 32 compares the values of the two extracted distances, and if the values are different, corrects the processing position coordinates of the bending processing information 300 to match the processing origin defined in the extraction processing NC. Match.

The bending information coupling unit 33 adds a bending line to the development drawing shown by the development data 28a based on the bending information 300, and performs a process of generating development drawing data 28b showing the development drawing including the bending line. A developed view with a bending line added is illustrated in FIG. Further, the bending information coupling unit 33 adds bending information 300 to the development data 28b.

The 3D model creation unit 34 refers to the bending / elongation value master 160 and the molding processing shape master 190 stored in the database 40, and performs a process of creating a 3D model based on the development data 28b.

As illustrated in FIG. 6, the elongation value of the workpiece corresponding to the bending conditions such as the material and plate thickness of the workpiece, the model number of the bending die, and the bending angle is registered in advance in the bending elongation master 160. ing. Further, in the molding processing shape master 190, a three-dimensional shape corresponding to a type of molding processing such as burring processing and tap processing is registered in advance.

The three-dimensional model creation unit 34 shown in FIG. 2 refers to the molding processing shape master 190, creates a three-dimensional molding processing shape based on the molding processing information 30, and bends based on the bending processing information 300 and the bending line. Create a shape, and finally create a hole shape to create a 3D model.

The above is the functional configuration of the 3D model restoration system 1. Subsequently, the operation of the three-dimensional model restoration system 1 will be described. The three-dimensional model restoration system 1 operates after the NC data is created. Therefore, regarding sheet metal processing, first, with respect to sheet metal processing, development drawing data 28 is created from design information 10, and further, with reference to FIG. 3, regarding the process of creating punching NC data 120 and bending NC data 130 from the development drawing data 28. I will explain.

When the design of the three-dimensional model of the product is completed, the development drawing data creation process for creating the development drawing data 28 is executed based on the generated design information 10 (step S101). The development drawing data creation process is executed as follows according to the form of the design information 10.

When the design information 10 is 3D CAD data, the development drawing data 28 is created from the 3D CAD data by the development drawing automatic creation function of the CAD system. When the design information 10 is CAD data of a two-dimensional three-view drawing, each surface of the three-view drawing is combined by the development drawing creation software to create the development drawing data 28. When the design information 10 is a two-dimensional three-view drawing of a paper medium, the development drawing data 28 is manually operated by CAD.

Since the sheet metal is stretched by the bending process, when the development view data 28 is created, the development view data creation process is performed in consideration of the elongation value stored in the bending elongation value master 160 illustrated in FIG.

Returning to FIG. 3, next, based on the development drawing data 28 created in step S101, NC data creation processing for creating punching NC data 120 and bending NC data 130 is performed. In the punching NC data creation process, first, referring to the processing conditions such as the information of the punching die registered in the punching die master 140 and the information of the sheet metal material held, the punching die Is placed on a suitable work. When the punching die can be appropriately arranged on the sheet metal material with the information registered in the punching die master 140 (step S102; Yes), the punching process NC data 120 is created by the NC program creation function (step S102; Yes). Step S103).

With the information registered in the punching die master 140, if the punching die cannot be placed on the sheet metal material (step S102; No), the molded product cannot be processed according to the design shape of the design information 10. Therefore, another punching die within the range of the dimensional tolerance and the geometrical tolerance included in the design information 10 is selected, and the punching die is arranged on the sheet metal material (step S201). After that, the punching NC data 120 is created by the NC program creation function (step S202).

When the punching NC data 120 is created, the bending NC data creation process is performed. Regarding the method of creating bending NC data, there are the following methods depending on the form of input information.

When the design information 10 is 3D CAD data, the NC data creation program extracts the attribute information related to the bending process, and the bending NC data 130 is automatically created. When the design information 10 is a three-dimensional view of two-dimensional CAD, the bending die to be used, the bending flange size, the bending angle, the number of times of bending for bending, etc. are manually input according to the bending order, and the bending NC data 130 is created. Will be done.

When the punching NC data 120 and the bending NC data 130 are created, these NC data are input to the NC machine tool, and the NC machine tool performs the actual machining of the punching and bending (step S104). ). At this time, before the actual machining, the trial machining is first performed, and the punching NC data 120 and the bending NC data 130 may be modified depending on the result of the trial machining. In this case, the corrected punching NC data 120 and bending NC data 130 are input to the NC machine tool, and the actual machining is performed.

Next, in order to check whether the molded product is manufactured correctly, the appearance of the molded product is measured by a three-dimensional measuring device (step S105).

Subsequently, a visual inspection is performed by comparing the value measured in step S105 with the three-dimensional model of the molded product (step S106). More specifically, the visual inspection apparatus refers to the punching tolerance table 170 and the bending tolerance table 180 corresponding to the punching process and the bending process stored in the database 40, and the molded product indicated by the measurement data. It is determined whether or not the difference from the three-dimensional model is within the range of these margins of error. If the difference is within the margin of error, it is determined to be acceptable, and if the difference is outside the margin of error, it is determined to be a defective product.

Here, the three-dimensional model that serves as the inspection reference is generated based on the design information 10 when the NC data is generated in step S103. On the other hand, when the NC data is generated in step S202, the molded product to be manufactured is different from that shown in the design information 10. Therefore, as the reference model for inspection, the 3D model restoration system 1 uses the 3D model restored in step S203 based on the NC data generated in step S202.

Next, the 3D model restoration process (step S203) in which the 3D model restoration system 1 restores or creates a 3D model that accurately represents the actually manufactured product will be described with reference to FIG.

The three-dimensional model restoration process (step S203) is a process executed after the punching NC data 120 and the bending NC data 130 are created (step S202), and is the expansion data restoration process (step S211) and three-dimensional. The model restoration process (step S212) is included.

First, the expansion data restoration process (step S211) will be described with reference to FIG.
When the punching NC data 120 is input, the expansion data restoration unit 2 stores it in the storage unit 12. Further, the expansion data restoration unit 2 notifies the punching NC data analysis unit 21 that the punching NC data 120 has been saved.

The punching NC data analysis unit 21 acquires the punching NC data 120 stored in the storage unit 12, reads the punching die master 140 stored in the database 40, and starts a process of generating punching information 200. To do.

More specifically, in the punching die master 140, information such as the die model number and die ID for identifying the punching die, the shape and dimensions of the punching die, the type of molding process, and the like are registered in advance. There is. On the other hand, in the punching NC data 120, information such as the die ID of the punching die to be used, the coordinate information of the machining position, the punching speed, and the machining type ID is described.

The punching NC data analysis unit 21 extracts necessary information from the punching NC data 120 and associates it with the information registered in the punching die master 140 to obtain the machining order, the model number of the punching die to be used, and the model number of the punching die to be used. Punching processing information 200 such as processing type, shape and dimension, processing position coordinates (X, Y) and the like is created and stored in the storage unit 12.

When the punching processing information 200 is created, the die arrangement unit 22 starts the die arrangement drawing creation process. The die arranging unit 22 arranges the die 25 on the work 24 based on the machining position coordinates (X, Y) of the punching processing information 200 and the dimensions of the die, and creates a die arranging diagram 29. An example of the mold arrangement FIG. 29 is shown in FIG. FIG. 7 shows a punching die in which the shaded portion is arranged. The punching die 25 may be arranged on the work 24 by the user operating the input device 51. FIG. 7 shows a state in which the outer shape punching die 25a and the three hole punching dies 25b are arranged on the rectangular work 24 in a plan view.

When the mold layout drawing 29 is created, the expansion data creation unit 23 performs the expansion data creation process. As shown in FIG. 8, the expansion data creation process includes the outline drawing process (step S301) for drawing the outline 26 representing the outer shape of the molded product and the hole shape for drawing the hole shape line 27 formed by the hole processing. It includes a drawing process (step S302) and a molding processing information combining process (step S303) in which molding processing information 30 such as a molding processing type, a molding die identification number, and processing position coordinates is added to the development data 28a.

In the outline drawing process (step S301), the outline drawing unit 231 reads the mold layout drawing 29 from the storage unit 12 and draws the outline 26. The outer line 26 is a line representing the outer shape of the molded product. Specifically, the outline drawing unit 231 performs a process of drawing the inner contour line of the closed region formed by the single or a plurality of outline drawing dies 25a used for the outline drawing process as the outline 26.

Next, the hole shape drawing unit 232 performs a process of drawing the hole shape line 27 on the mold layout drawing 29 on which the outline is drawn (step S302). The hole shape line 27 is an outer line of the hole punching die 25b arranged on the work 24. Specifically, the hole shape drawing unit 232 sets the outline of the hole punching die 25b as a hole shape line based on the coordinate information, shape information, and dimensional information of the hole punching die 25b arranged in the mold layout drawing 29. Draw on the work 24 as 27. If there are a plurality of drilling dies 25b, all of them are drawn as hole shape lines 27.

Finally, the molding processing information coupling unit 233 generates a development drawing from the outline line 26 and the hole shape line 27, and creates the development data 28a showing the development drawing. Next, the molding processing information coupling unit 233 uses information such as the identification number of the molding die, the type of molding processing, and the processing position coordinates of the molding die from the punching processing information 200 created by the punching NC data analysis unit 21. Is extracted to create molding processing information 30, and molding processing information combining processing (step S303) is executed in which the molding processing information 30 is added to the development data 28a.

By the above processing, the development data 28a to which the molding processing information 30 is added is created. The expansion data restoration unit 2 stores the expansion data 28a to which the molding processing information 30 is added in the storage unit 12.

Next, the three-dimensional model restoration process (step S212) shown in FIG. 3 will be described with reference to FIG.

When the bending NC data 130 is input to the input / output unit 14, the three-dimensional model restoration unit 3 stores the bending NC data 130 in the storage unit 12. Further, the three-dimensional model restoration unit 3 notifies the bending NC data analysis unit 31 that the bending NC data 130 has been saved.

The bending NC data analysis unit 31 acquires the bending NC data 130 stored in the storage unit 12, reads the bending die master 150 stored in the database 40, and starts a process of generating the bending information 300. ..

Information such as the ID of the bending die, the die V width, the bending radius R, and the processing type corresponding to the NC code is registered in the bending die master 150. The bending NC data 130 includes information such as the NC code of the bending die used, the machining position coordinates of the bending die, the bending angle, and the bending direction with respect to the machining origin for the bending process. Here, the bending direction with respect to the machining origin means the direction of the bending line connecting the start point coordinates to the end point coordinates with respect to the X axis, as shown in FIG.

Specifically, the bending NC data analysis unit 31 extracts necessary information from the bending NC data 130 and associates it with the information registered in the bending die master 150 to perform bending as shown in FIG. Information 300 is created. As shown in the figure, the bending processing information 300 includes the bending order, the model number of the bending die used for the bending process, the bending pattern, the start point coordinates and the end point coordinates of the processing position, the bending angle, and the like. The bending NC data analysis unit 31 stores the bending information 300 in the storage unit 12 and notifies the flow direction reference correction unit 32.

Upon receiving the notification from the bending NC data analysis unit 31, the flow direction reference correction unit 32 acquires the punching NC data 120, the bending NC data 130, and the bending information 300 from the storage unit 12, and performs the flow direction reference correction processing. To start.

As a premise, each machining origin is defined in the punching NC data 120 and the bending NC data 130 by presetting the distance from the machine origin of the machine tool.

The flow direction reference correction unit 32 compares the coordinate values of the respective machining origins from the punching NC data 120 and the bending NC data 130. When the coordinate values of the machining origin are different, the flow direction reference correction unit 32 calculates the difference value of the coordinates of the machining origin between the punching NC data 120 and the bending NC data 130, and the machining position of the bending information 300. Extraction processing Performs processing to unify the coordinates with the processing position coordinates of NC. Specifically, the flow direction reference correction unit 32 subtracts the coordinates (X2, Y2) of the machining origin of the punching NC data 120 from the coordinates (X1, Y1) of the machining origin of the bending NC data 130, and the difference (XD). , YD) = (X1-X2, Y1-Y2). The flow direction reference correction unit 32 adds a difference (XD, YD) to the machining start point position coordinates (Xs, Ys) and end point position coordinates (Xe, Ye) of the bending machining information 300, respectively, to perform punching NC. Performs processing that is unified with the processing coordinates. The flow direction reference correction unit 32 stores the bending processing information 300 (hereinafter, 300A for distinction) in which the start point coordinates and the end point coordinates of the processing position are corrected in the storage unit 12.

The bending information coupling unit 33 combines the expansion data 28a created by the expansion data restoration unit 2 and the bending information 300A created by the bending NC data analysis unit 31. Specifically, the bending information coupling unit 33 adds a bending line to the development drawing shown by the development data 28a according to the bending information 300A, and adds information such as the model number of the bending die and the bending angle to the bending line. Perform the processing.

Explain the process of adding a bending line to the development drawing. First, as shown in FIG. 9, the bending information coupling unit 33 adds a bending line having a bending direction of 0 ° to the development drawing represented by the development data 28a. The bending line having a bending direction of 0 ° corresponds to a bending line parallel to the X-axis.

More specifically, the bending processing information coupling unit 33 plots the processing start point coordinates (Xs, Ys) and end point coordinates (Xe, Ye) of the bending die. For example, in the case of bending in the bending order 1 of the bending information shown in FIG. 5, the machining start point coordinates (50, 50) and end point coordinates (480, 50) of the bending die are plotted.

The bending information coupling unit 33 is among a plurality of intersections where the line connecting the machining start point coordinates (Xs, Ys) of the bending die and the machining end point coordinates (Xe, Ye) of the bending die intersects the outline line 26. The coordinates of the intersection that is larger than the X coordinate Xs of the processing start point of the bending die and has the minimum X value are set as the start point coordinates of the bending line. Further, the coordinates of the intersection that is smaller than the X coordinate Xe of the processing end point of the bending die and has the maximum X value are set as the end point coordinates of the bending line. If there are multiple bending processes with a bending direction of 0 °, this process is repeated for the number of times of bending, and the bending line is shown.

Next, the bending information coupling portion 33 draws a bending line with a bending direction of 90 °. The bending line having a bending direction of 90 ° corresponds to a bending line parallel to the Y axis. More specifically, the bending processing information coupling unit 33 plots the processing start point coordinates (Xs, Ys) and end point coordinates (Xe, Ye) of the bending die. For example, in the case of bending in the bending order 2 of the bending information shown in FIG. 4, the processing start point coordinates (40, 50) and end point coordinates (40, 90) of the bending die are plotted. The bending information coupling unit 33 is among a plurality of intersections where the line connecting the machining start point coordinates (Xs, Ys) of the bending die and the machining end point coordinates (Xe, Ye) of the bending die intersects the outline line 26. The coordinates that are larger than the processing start point Y coordinate Ys of the bending die and have the minimum Y value are set as the bending line coordinate start point. The coordinates that are smaller than the machining end point Y coordinate Ye of the bending die and have the maximum Y value are set as the machining end point coordinates of the bending line. If there are multiple bending processes with a bending direction of 90 °, this process is repeated for the number of times of bending.

If there is another bending direction bending line, the bending processing information coupling unit 33 performs the same processing on the bending line.

The bending information coupling unit 33 adds bending information 300 such as the model number of the mold used for bending, the position coordinates of the bending line, and the bending angle to each bending line.

By performing the above processing, the development data 28b showing the development drawing to which the bending line is added and to which the bending processing information 300 is added can be obtained. The bending information coupling unit 33 stores the created development data 28b in the storage unit 12, and notifies the three-dimensional model creation unit 34 to that effect.

Upon receiving the notification from the bending information coupling unit 33, the three-dimensional model creation unit 34 acquires the expansion data 28b, reads the bending elongation value master 160 and the molding processing shape master 190 stored in the database 40, and three-dimensionally. Start the process of creating a model.

First, the three-dimensional model creation unit 34 reads the molding processing information 30 combined by the molding processing information coupling unit 233 from the expansion data 28b, and acquires the molding processing type information. Next, the three-dimensional molding shape corresponding to the acquired type of molding processing is acquired from the molding processing shape master 190, and the molding processing shape is added to the development shape of the development data 28b.

Next, the three-dimensional model creation unit 34 makes the developed shape three-dimensional with reference to the bending elongation value master 160 stored in the database 40 based on the bending processing information 300 created by the bending processing information coupling unit 33. Perform processing.

As illustrated in FIG. 6, in the bending elongation value master 160, the elongation values corresponding to the material information of the workpiece, the model number of the bending die, the plate thickness information, and the condition set of the bending angle are registered. The 3D model creation unit 34 obtains the elongation value from the bending elongation value master 160 for each coordinate position of the bending process, calculates the dimension by subtracting the bending flange length, and adds the bending shape. And create a 3D model.

Finally, the 3D model creation unit 34 adds the hole shape line 27 in the outline 26 to the 3D model to create the 3D model.

The 3D model output according to the 3D model restoration process described above is the punch actually used in manufacturing when it is determined in step S102 that the punch die 25 cannot be arranged according to the design information 10. It is generated using type information and placement information. That is, since it is generated in consideration of the actual processing conditions, the shape of the molded product is more consistent than the three-dimensional model defined in the design information 10 in which the processing conditions are not added. Therefore, for example, as shown in FIG. 3, when three-dimensional measurement of the molded product obtained by actual processing is performed (step S105) and inspection is performed to compare the three-dimensional model with the measurement data of the molded product (step S106). ), It is possible to prevent operations such as being judged to be different from the three-dimensional model even though it is a normal molded product.

Therefore, for example, using the three-dimensional object inspection apparatus described in Patent Document 1, a process of comparing the restored three-dimensional model with the measurement data of the inspection object and identifying the inspection object, for the inspection object It becomes possible to more appropriately perform a process of determining an inspection method to be performed, a process of controlling the position, posture, etc. of a sensor and a lighting system.

However, the 3D model output by this process includes equipment processing errors. Therefore, when actually inspecting, it is desirable to define a punching tolerance table and a bending tolerance table, and inspect the molded product depending on whether or not it is within the range of these errors.

In the above description, the case where the three-dimensional model restoration system 1 is mounted on one device has been described, but the mounting form is not limited to this. For example, each part of the three-dimensional model restoration system 1 may be mounted on a separate device and connected by a network.

Further, the 3D model restoration process (step S203) of the 3D model restoration system 1 has been described as a process to be performed when the extraction die cannot be arranged according to the design information, but the extraction die could be arranged according to the design information. In some cases (step S102: YES), it may be carried out.

Further, the function of the 3D model restoration system 1 can be realized by dedicated hardware or by a normal computer system. For example, an existing computer is written by writing a program for realizing each functional configuration by the three-dimensional model restoration system 1 illustrated in the above embodiment to a storage medium such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory. The information terminal device or the like can function as a three-dimensional model restoration system by reading a program stored in a storage medium and executing the program by the CPU. Further, the three-dimensional model restoration method according to the present disclosure can be carried out by using the three-dimensional model restoration system 1.

Also, the method of applying such a program is arbitrary. The program can be stored and applied on a computer-readable recording medium (CD-ROM (Compact Disk Ready-Only Memory), DVD (Digital Versaille Disc), MO (Magnet Optical disk), etc.), or on the Internet. It is also possible to apply by storing the program in the storage of and downloading it.

It should be noted that the present disclosure allows various embodiments and modifications without departing from the broad spirit and scope of the present disclosure. Moreover, the above-described embodiment is for explaining this disclosure, and does not limit the scope of the present disclosure. That is, the scope of the present disclosure is indicated not by the embodiment but by the claims. And various modifications made within the scope of the claims and within the equivalent meaning of disclosure are considered to be within the scope of this disclosure.

This application is based on Japanese Patent Application No. 2019-099220, which was filed on May 28, 2019. The specification, claims, and the entire drawing of Japanese Patent Application No. 2019-099220 shall be incorporated into this specification as a reference.

1 3D model restoration system, 2 Deployment data restoration unit, 3 3D model restoration unit, 4 3D model, 10 design information, 11 CPU, 12 storage unit, 13 communication unit, 14 input / output unit, 21 punching NC data Analysis unit, 22 mold placement unit, 23 development data creation unit, 24 workpieces, 25 punching mold, 25a outer punching mold, 25b drilling mold, 26 outer line, 27 hole shape line, 28 development drawing data, 28a , 28b development data, 29 mold layout, 30 molding processing information, 31 bending NC data analysis unit, 32 flow direction reference correction unit, 33 bending information coupling unit, 34 3D model creation unit, 40 database, 50 display Device, 51 input device, 52 output device, 53 external storage device, 60 CAD system, 99 internal bus, 110 network, 120 punching NC data, 130 bending NC data, 140 punching die master, 150 bending die master, 160 Bending elongation master, 170 Punching tolerance table, 180 Bending tolerance table, 190 Molding shape master, 200 Punching information, 231 Outline drawing part, 232 Hole shape drawing part, 233 Molding processing information coupling part, 300 Bending Machining information, 400 manufacturing system, 410 punching machine, 420 bending machine, 430 measuring device, 440 inspection device.

Claims

Extraction data restoration unit that creates expansion data based on punching NC data,
A 3D model restoration unit that creates a 3D model based on the bending NC data and the development data, and
It is a 3D model restoration system equipped with
The expanded data restoration unit
Punching NC data analysis unit that creates punching information from NC data,
Based on the punching processing information, a die arranging unit for creating a die arranging diagram in which the dies are arranged at coordinate positions, and
A deployment data creation unit that creates deployment data based on the mold layout, and
With
The three-dimensional model restoration unit
Bending processing NC data analysis unit that creates bending processing information from bending processing NC data,
A bending information coupling portion that combines the bending information and the bending line with the development data,
A 3D model creation unit that creates a 3D model based on the development data to which the bending processing information and the bending line are added.
3D model restoration system with.
The expansion data creation unit
An outline drawing unit that draws the inner contour line of the closed area formed by the outer shape punching die arranged in the mold arrangement drawing as an outer line.
A hole shape drawing unit that draws the outer shape of the drilling die arranged in the mold layout drawing as a hole shape, and
A molding processing information coupling unit that combines molding processing information with the development data,
The three-dimensional model restoration system according to claim 1.
The three-dimensional model restoration unit
The coordinate values of the machining origin defined in the punching NC data and the bending NC data are acquired, and the coordinate values of the machining origin defined in the bending NC data and the machining origin defined in the punching NC data. Further has a flow direction reference correction unit that corrects the processing position coordinates of the bending processing information based on the difference of the coordinate values of.
The three-dimensional model restoration system according to claim 1 or 2.
The 3D model restoration system according to any one of claims 1 to 3 and
An inspection means for inspecting by comparing the three-dimensional model generated by the three-dimensional model restoration system with the appearance inspection data of the inspection object manufactured based on the NC data.
Inspection device equipped with.
Further equipped with an arrangement possibility determination means for determining whether or not it is possible to arrange the punching die as specified by the design information.
The inspection means
When the dispositionability determination means determines that the dispositionability is possible, the three-dimensional model generated based on the design information is used as a comparison target.
When it is determined that the dispositionability determination means cannot be arranged, the three-dimensional model generated by the three-dimensional model restoration system is used as a comparison target.
The inspection device according to claim 4.
Placement possibility determination means for determining whether or not it is possible to arrange the punching die as specified by the design information, and
When it is determined that the dispositionability determination means can be arranged, the means for generating NC data based on the design information and the means for generating NC data
When the dispositionability determination means determines that the dispositionability is possible, a means for generating NC data with specifications different from the design information and a means for generating NC data.
The inspection device according to claim 4, further comprising.
It is a 3D model restoration method by a 3D model restoration system including an expansion data restoration unit and a 3D model restoration unit.
The expansion data restoration unit creates expansion data based on the punching NC data, and the expansion data restoration step.
A 3D model restoration step in which the 3D model restoration unit creates a 3D model based on the bending NC data and the development data.
A three-dimensional model restoration method including.
On the computer
Create expansion data from punching NC data and
A three-dimensional model is created from the bending NC data and the development data.
A program that executes processing.