JP2019209446A - Work instruction generation device and work instruction generation method - Google Patents

Abstract

To make it possible to generate work instruction with better efficiency.SOLUTION: This work instruction generation device comprises: a storage part which stores 3D model information concerning components and a structure of an assembly, and component kind information which defines part assembly which is a combination of classification condition of kinds of the components and the components; a component kind classification part which classifies the components and component kinds of the part assembly by use of said 3D model information and component kind information; a part assembly setting part which sets the part assembly to the components by use of said 3D model information and component kind information; an inter-component adjacent relationship generating part which analyzes an adjacent relationship of the components by use of a prescribed analysis method according to the component kinds, and generates an assembly graph which indicates an inter-component adjacent relationship for each component kind; and an assembly sequence generation part which generates an assembly sequence of the components by use of said assembly graph.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a work instruction generation device and a work instruction generation method.

  Patent Document 1 relates to an assembling apparatus. “Here, CAD data means three-dimensional CAD data to which information necessary for an assembly work plan is added. An assembly work plan is input by the task planner using the three-dimensional CAD data as an input. The assembly robot program is automatically generated in a short time offline, the assembly work is modeled by a Petri net, the optimum route is searched, and the obtained program is downloaded to the robot to perform the actual work. The error between the virtual space and the real space in the simulator is corrected by LRF. "

JP-A-10-263957

  The technique described in Patent Document 1 discloses a technique for organizing the work procedure of the assembly work of the assembly robot using information on the assembly order, calculating the work cost, and searching for an efficient optimum route. However, in the technique of the above-mentioned document, there is a problem that connection information between parts that is useful for an assembly work plan cannot be obtained because the part type is not considered.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a work instruction generation device capable of generating a more efficient work instruction.

  The present application includes a plurality of means for solving at least a part of the above-described problems. Examples of such means are as follows. A work instruction generation apparatus according to an aspect of the present invention that solves the above problems includes 3D model information that is geometric information related to an assembly component and structure, a classification condition of a component type of the component, and the component A storage unit that stores component type information that defines a set that is a combination; a component type classifying unit that classifies the component type and the component type of the set using the 3D model information and the component type information; , Using the 3D model information and the component type information, a grouping setting unit that sets a group for the component, and a predetermined analysis method according to the component type to determine the adjacent relationship of the component An inter-part adjacency generation unit that analyzes and generates an assembly graph indicating inter-part adjacency for each part type, and generates an assembly order of the component parts using the assembly graph And a assembly sequence generator.

  According to the work instruction generation device according to the present invention, a more efficient work instruction can be generated.

It is the figure which showed an example of schematic structure of the work instruction | indication production | generation system containing the function structure of the work instruction | indication production | generation apparatus which concerns on one Embodiment of this invention. It is the figure which showed an example of 3D model information which concerns on one Embodiment of this invention. It is the figure which showed an example of the component classification information which concerns on one Embodiment of this invention. It is the figure which showed an example of the hardware constitutions of the work instruction production | generation apparatus which concerns on one Embodiment of this invention. It is the figure which showed an example of 3D work instruction | indication production | generation process according to process which concerns on one Embodiment of this invention. It is the figure which showed an example of the 3D model ("other general part") of the assembly contained in 3D CAD data which concerns on one Embodiment of this invention. It is the figure which showed the assembly graph of the assembly shown in FIG. It is the figure which showed the assembly graph which expressed the graph of the part of FIG. 7 as a node. It is the figure which showed an example of sectional drawing of the 3D model ("screw") contained in the 3D CAD data which concerns on one Embodiment of this invention. It is the figure which showed the assembly graph of the "screw" shown in FIG. It is the figure which showed an example of sectional drawing of the 3D model ("wiring") contained in 3D CAD data which concerns on one Embodiment of this invention. It is the figure which showed the assembly graph of "wiring" shown in FIG. It is the flowchart which showed the detail of the production | generation process of the calculation component structure tree which concerns on one Embodiment of this invention. It is the figure which showed an example of the 3D CAD part structure tree which concerns on one Embodiment of this invention, an example of the 3D model corresponding to a 3D CAD part structure tree, and the assembly graph of a 3D model. It is the figure which showed the 3D CAD component structure tree after the process of step S520. FIGS. 16A to 16C are diagrams showing assembly graphs when Parts 8, Parts 9, and Parts 7 are incorporated into a layer having an adjacent relationship. FIG. 15 is a diagram illustrating the 3D CAD component configuration tree of FIG. 14 and a calculation component configuration tree in which parent-child relationships are organized. It is the flowchart which showed the detail of the assembly sequence production | generation process which concerns on one Embodiment of this invention. It is the figure which showed an example of the assembly graph which added the expression of the base component and work step which concerns on one Embodiment of this invention. It is explanatory drawing when inconsistency arises from order restrictions and interference determination. It is the example of a screen which showed an example of 3D work instructions according to a process.

  Generally, in the manufacturing industry, it is necessary to show the assembly order of products to the worker in an easily understandable manner. In such an assembly order instruction, it is easier to visually understand the positional relationship and assembly direction of components when using a three-dimensional model than when using a two-dimensional assembly drawing. For example, a work instruction method that shows a series of assembly orders as a moving image, such as a three-dimensional animation, or a work instruction method that is shown in an explanatory view using a perspective view created along the assembly order based on a three-dimensional model, etc. Has been.

  The assembly order of products can be roughly divided into two steps. A total assembly process for final assembly, and a process for assembling a plurality of parts as one unit (assembly or subassembly) before the total assembly process. A plurality of these processes are connected step by step as a hierarchy to form a process flow. When giving a work instruction, in this process flow, the specific assembly order for each process is often indicated and instructed.

  On the other hand, the component configuration tree of three-dimensional CAD (Computer Aided Design) data is not an assembly order and is often not a component configuration tree for each process. For this reason, in creating 3D work instructions, we carefully examine the assembly of work that is a process based on 3D CAD data, the assembly order between processes and within the process, and refer to the 3D CAD part configuration tree. Editing work is required. Further, it is necessary to set the movement of each part based on the edited result, create an animation, and create an explanatory diagram of the assembly order for each process. Therefore, it takes a lot of time and cost to create a 3D work instruction.

  Information processing technology that assists in the creation of 3D work instructions (for example, the movement definition system of basic processes and intermediate processes, and the movement positions of parts, parts groups, and process part groups along the coordinate system are added to the disassembly definition information. However, in the case of a product having a large number of parts consisting of thousands of parts, a considerable work man-hour is required.

  The work instruction generation device according to the present invention solves the above-described problems. Hereinafter, the work instruction generation device according to the present embodiment will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating an example of a schematic configuration of a work instruction generation system including a functional configuration of the work instruction generation apparatus 100 according to the present embodiment. As illustrated, the work instruction generation system includes a work instruction generation apparatus 100 and a 3D CAD (three-dimensional Computer-Aided Design) apparatus 200. Note that the work instruction generation device 100 is connected to the 3D CAD device 200 so as to be able to communicate with each other via a predetermined network N such as a LAN (Local Area Network) or the Internet.

  Note that the 3D CAD apparatus 200 is an information processing apparatus such as a personal computer that can execute a 3D CAD program. However, the 3D CAD apparatus 200 is not limited to an independent apparatus, and may operate as a partial function of the work instruction generation apparatus 100.

  The work instruction generation device 100 is a device that generates a work instruction for each assembly process in three dimensions (3D). As illustrated, the work instruction generation device 100 includes a storage unit 110, a calculation unit 120, and a communication unit 140.

  The storage unit 110 is a functional unit that stores various information. Specifically, the storage unit 110 includes 3D model information 111, part type information 112, analysis calculation program 113, order constraint information 114, calculation condition information 115, and assembly order created case information 116. I remember it.

  FIG. 2 is a diagram illustrating an example of the 3D model information 111. The 3D model information 111 is information for making a completed assembly completed by assembling parts into a 3D model and specifying the component parts and the structure thereof. Specifically, the 3D model information 111 includes a record in which an identifier 111a, a classification 111b, an item 111c, and a value 111d are associated with each other. The 3D model information 111 is information generated by the work instruction generation device 100 using 3D CAD data acquired from the 3D CAD device 200.

  The identifier 111a is information for identifying a record storing configuration information of the 3D model. The classification 111b is information indicating the category of items related to the component represented by the 3D model. The classification 111b includes, for example, a component attribute, a shape feature, a component coordinate system, a component configuration tree, and an adjacent relationship between components, but is not limited thereto.

  The item 111c is information indicating an item related to the associated classification 111b. For example, the item 111c associated with the component attribute includes, for example, a component ID, a hierarchy number, a model name, a model shape file path, a component type, a base component (flag), and a material. Note that the information regarding the component type is specified in the process of step S20 in the process-specific 3D work instruction generation process described later. In addition, the item 111c associated with the classification may include a part drawing number, a note, a specific gravity according to the material, and the like.

  The model shape file path is information indicating the file path of the model shape file in units of parts acquired from the 3D CAD apparatus 200. The model shape file is a 3D shape data file format that can be converted from the 3D CAD apparatus 200, such as STL (Standard Triangulated Language), STEP, PARASOLID, JT, or XVL. The model shape file is used when performing analysis using the 3D model shape, confirmation of the 3D model shape, display of calculation results, and the like.

The item 111c associated with the shape feature includes information on the shape feature such as volume, surface area, maximum length, center of gravity, and bounding box (coordinates of eight vertices of a rectangular parallelepiped serving as a boundary surrounding the part). The item 111c associated with the shape feature may include other items such as mass, principal moment of inertia, principal axis of inertia, and the like.

  The item 111c associated with the component coordinate system includes the origin of the component, coordinates on the XYZ axes, and the like. The component coordinate system indicates the position / posture of the component at the final position of the assembled product.

  The item 111c associated with the part configuration tree includes a calculation obtained by converting a 3D CAD model tree (hereinafter sometimes referred to as a “3D CAD part configuration tree”) acquired from the 3D CAD apparatus 200 or a CAD part configuration tree into an assembly unit. Part configuration tree, or a subpart calculation part configuration tree extracted from a part of the component configuration tree, the type of the part configuration tree, the parent part ID, and the parent part ID indicating whether the parent part is handled as a set (subassembly) There are child part IDs and the like included in the hierarchy of types and parent part IDs.

  The item 111c associated with the adjacent relationship between components includes a constraint type analyzed for each component type, an element type of each constraint for the extracted adjacent relationship, a component ID including a constraint element, a constraint element vector, and There is information about the adjacency relationship between parts such as the origin of the constraint element. In addition, the information regarding each item matched with the adjacent relationship between components is specified by the process of step S40 in the 3D work instruction | indication process according to process mentioned later.

  The adjacent relationship between parts is assembly constraint information set when modeling an assembly model. Note that the adjacent relationship between parts may be information acquired by clearance analysis using an assembly model. For example, one method of clearance analysis is to search for another model within the clearance distance from each face of the modeled part based on a set threshold, and to find the surface of the adjacent part (planar pair) obtained as a result of the search. A plane, a cylindrical surface versus a cylindrical surface, a conical surface versus a conical surface, and a plane versus a cylindrical surface).

  The constraint element information obtained from assembly constraint and clearance analysis information is, for example, in the case of a plane, the constraint surface normal facing the outside of the model is the constraint element vector, and the constraint point is constrained. Get as surface origin. For example, in the case of a cylindrical surface, it is desirable that the axial direction of the cylinder be a vector of the constraint element and a point on the axis be the origin of the constraint element.

  The value 111d is information indicating a specific value for each associated item.

  Note that the target part to be the target of the 3D model includes not only one part model but an assembly model that is an assembly composed of a plurality of parts. The 3D model information 111 may be configured by a database, or may be configured by XML (extensible Markup Language).

  FIG. 3 is a diagram showing an example of the component type information 112. The component type information 112 is information defining a predetermined determination condition used for determining the component type. Specifically, the component type information 112 includes a record in which an ID 112a, a component type name 112b, a 3D CAD model component attribute and shape feature determination condition 112c, and a calculation target setting type 112d are associated with each other. ing. The component type information 112 is information stored in advance in the storage unit 110 of the work instruction generation device 100.

  The ID 112a is information for identifying a record in which a component type and a determination condition are stored. The component type name 112b is information for specifying the name of the component type. The part attribute and shape feature determination condition 112 c of the 3D CAD model is a determination condition for determining the part type, and corresponds to the part attribute and shape feature of the 3D model information 111. Specifically, the part attribute determination conditions of the 3D CAD model include a model name 112e, a part diagram number 112f, and a part name title 112g, and the shape feature determination condition includes a dimension condition 112h.

  The part diagram number 112f and the part name title 112g correspond to text information arbitrarily defined by the user in the part model or assembly model of the 3D CAD data. In addition, the part attribute of the character string such as the model name 112e and the part name title 112g may be assigned not only by the complete match of all the character strings but also by the partial match. It corresponds to a character string (for example, a character string represented by a regular expression) including an asterisk symbol.

  The shape feature of the 3D CAD model is not limited to the dimensional condition, and may include mass characteristics that can be acquired by calculating the 3D CAD model such as the vertex, the center of gravity, and the main moment of inertia of the bounding box in the part model. In addition, in consideration of determination by numerical values, ranges such as “equal”, “greater than (below)”, “greater than **” may be conditioned, such as logical product (AND) and logical sum (OR) of conditions, etc. Conditioning including conditions may be included.

  Further, the parent flag 112i is flag information for setting that the component with the associated component type name 112b is a parent component. The setting type 112d to be calculated is excluded from the calculation target in the process of generating the assembly order for the part with the corresponding part type name 112b, whether disassembly is not necessary, or whether it is handled as a set (assembly), etc. Is information for setting. For example, the row of ID8 indicates that the part determined as “welding” is set as “not subject to calculation” in the assembly order. The row of ID9 is an assembly model in which the part (parent part) determined to be “capacitor” is a purchased product, and is modeled as an assembly model consisting of a plurality of parts in CAD modeling. Since there is no need for disassembly, it is indicated that “disassembly is not required (purchased product)”.

  Further, for example, the rows of ID10 and ID11 indicate that parts (parent parts) determined to be “A unit” and “B unit” are handled as a set (subassembly) in the part configuration tree.

  Note that the “sub-assembly” calculates the assembly order under the hierarchy of the set after calculating the assembly order in the higher component structure tree. Details of this processing will be described later.

  Returning to FIG. The analysis calculation program 113 in the storage unit 110 is program information that is read by the work instruction generation device 100 when executing a process-specific 3D work instruction generation process described later.

  The order constraint information 114 is information defining constraints on the assembly order of component parts. Specifically, the order constraint information 114 defines a part to be assembled first and a part to be assembled thereafter for each part type. For example, when the component type is a screw and the screw and the component tightened by the screw are adjacent to each other, the sequence constraint information 114 defines an order constraint that the screw adjacent component is assembled before the screw. ing.

  The calculation condition information 115 defines conditions for selecting the next decomposition candidate when searching for a disassembly order (assembly order) using an assembly graph network (hereinafter, sometimes referred to as an “assembly graph”). Information. For example, in the calculation condition information 115, “the smaller the number of adjacent parts, the easier it is to disassemble”, “parts that receive less load from other parts in an adjacent relationship, etc., are easier to disassemble”, Priority conditions for calculating the disassembly order are defined, such as “parts that can be disassembled in the same direction as the parts that have been disassembled have good workability”.

  The assembly order created case information 116 is information relating to assembly order cases created in the past. For example, the assembly order created case information 116 includes a plurality of edits of work steps for each process and assembly orders in the work steps based on the assembly sequence generation results previously created by the work instruction generation apparatus 100. Has case information. The case information is preferably edited from the assembly sequence calculated using the input information of the work instruction generation device 100.

  Next, the calculation unit 120 will be described. The calculation unit 120 is a functional unit that performs various processes of the work instruction generation device 100. Specifically, the calculation unit 120 includes an input reception unit 121, an output processing unit 122, a 3D model information generation unit 123, a component type classification unit 124, a grouping setting unit 125, and inter-component adjacency generation. A unit 126, a calculation component configuration tree generation unit 127, an order constraint setting unit 128, an assembly sequence generation unit 129, a 3D animation generation unit 130, and a work instruction generation unit 131.

  The input receiving unit 121 is a functional unit that receives an instruction input from a user via an input device included in the work instruction generating device 100.

  The output processing unit 122 is a functional unit that generates screen information to be displayed on an output device included in the work instruction generation device 100.

  The 3D model information generation unit 123 is a functional unit that generates 3D model information 111 related to the components of the assembly using the 3D CAD data acquired from the 3D CAD apparatus 200.

  The component type classification unit 124 is a functional unit that classifies the component types of the components of the assembly included in the 3D CAD data.

  The grouping setting unit 125 is a functional unit that sets a group composed of a plurality of parts for the components of the assembly.

  The inter-component adjacency generation unit 126 is a functional unit that analyzes the adjacency relationship between components and generates an assembly graph. Specifically, the inter-component adjacency generation unit 126 uses the 3D model information 111 and the component type information 112 to analyze the arrangement relationship and the adjacency relationship of the components by a predetermined analysis method according to the component type. An assembly graph is generated in which adjacent relations between parts are represented by nodes and edges, respectively.

  The calculation component configuration tree generation unit 127 edits the 3D CAD component configuration tree included in the 3D CAD data, and calculates the component configuration tree for conversion obtained by converting the CAD model tree into an assembly unit and a subassembly calculation for extracting a part thereof. This is a functional unit that generates a part configuration tree such as a part configuration tree.

  The order constraint setting unit 128 is a functional unit that sets the order constraint of the assembly order for the components of the assembly using the order constraint information 114. For example, when the component type is a screw, a component adjacent to the screw (screw adjacent component) is a component that is tightened with the screw. Therefore, the order constraint setting unit 128 uses the sequence constraint information 114 to set an order constraint in which a screw adjacent component is assembled before a screw. Further, when the component type part is a wiring, a component adjacent to the wiring (wiring connection component) is a component to which the wiring is connected. Therefore, the order constraint setting unit 128 uses the order constraint information 114 to set an order constraint in which the wiring connection component is assembled before the wiring.

  The assembly sequence generation unit 129 is a functional unit that generates the assembly order of the assembly. Specifically, the assembly sequence generation unit 129 generates an assembly disassembly order using the calculation component configuration tree generated by the calculation component configuration tree generation unit 127 and an assembly graph indicating the adjacency relationship between components. To do. Further, the assembly sequence generation unit 129 generates the assembly order of the assembly by reversely converting the disassembly order.

  The 3D animation generation unit 130 is a functional unit that generates a 3D animation. Specifically, the 3D animation generation unit 130 generates a 3D animation indicating an assembly operation in the assembly order using predetermined information such as an assembly sequence generated by the assembly sequence generation unit 129.

  The work instruction generation unit 131 is a functional unit that generates a 3D work instruction for each process. Specifically, the work instruction generating unit 131 generates work instruction information including an assembly sequence generated for each process and a 3D animation.

  The functional configuration (functional block) of the work instruction generation device 100 has been described above.

  FIG. 4 is a diagram illustrating an example of a hardware configuration of the work instruction generation device 100. As illustrated, the work instruction generation device 100 is realized by a high-performance information processing device such as a server device, but may be realized by a high-performance personal computer.

  As illustrated, the work instruction generation device 100 includes an input device 301, an output device 302, an external storage device 303, an arithmetic device 304, a main storage device 305, and a communication device 306.

  The input device 301 is a pointing device such as a keyboard, a mouse, or a touch panel. The output device 302 is, for example, a liquid crystal display or an organic display.

  The external storage device 303 is a non-volatile storage device such as a so-called hard disk (Hard Disk Drive), SSD (Solid State Drive) or flash memory capable of storing digital information.

  The arithmetic device 304 is, for example, a CPU (Central Processing Unit). The main storage device 305 is a memory device such as a RAM (Random Access Memory) and a ROM (Read Only Memory).

  The communication device 306 is a wired communication device that performs wired communication via a network cable or a wireless communication device that performs wireless communication via an antenna. The communication device 306 performs information communication with, for example, the 3D CAD device 200 connected to the network N.

  Note that the calculation unit 120 of the work instruction generation device 100 is realized by a program (for example, the analysis calculation program 113) that causes the calculation device 304 to perform processing. This program is stored in the main storage device 305 or the external storage device 303, loaded onto the main storage device 305 when the program is executed, and executed by the arithmetic device 304. The storage unit 110 is realized by the main storage device 305, the external storage device 303, or a combination thereof. The communication unit 140 is realized by the communication device 306.

  Further, each of the above-described configurations, functions, processing units, processing means, and the like of the work instruction generation device 100 may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. The above configuration and functions may be realized by software by the processor interpreting and executing a program that realizes each function. Information such as programs, tables, and files for realizing each function can be stored in a storage device such as a memory, a hard disk, and an SSD, or a recording medium such as an IC card, an SD card, and a DVD.

  In addition, the hardware configuration of the work instruction generation device 100 is not limited to these, and may be configured using other hardware. For example, a device that receives input / output via the Internet may be used. Although not shown, the work instruction generation device 100 has known elements such as an OS (Operating System), middleware, and applications, and in particular, an existing processing function for displaying a GUI screen on the output device 302 such as a display. Is provided.

  The hardware configuration of the work instruction generation device 100 has been described above.

[Description of operation]
FIG. 5 is a diagram illustrating an example of the process-specific 3D work instruction generation process executed by the work instruction generation apparatus 100. This process is started when, for example, the input receiving unit 121 receives an execution instruction for the process-specific 3D work instruction generation process from the user.

  When the process is started, the 3D model information generation unit 123 acquires 3D CAD data from the 3D CAD apparatus 200 via the communication unit 140 (step S10). Further, the 3D model information generation unit 123 extracts information such as part attributes and shape characteristics regarding each component of the assembly from the acquired 3D CAD data, and generates 3D model information 111. Note that the component type of the 3D model information 111 is specified by a process in step S20 described later. Further, the inter-component adjacency relationship of the 3D model information 111 is analyzed by a process in step S40 described later.

  Next, the component type classification unit 124 classifies the component type using the 3D model information 111 (step S20). Specifically, the component type classifying unit 124 extracts information and shape features related to component attributes such as the model name, component diagram number, and component name title of each component from the 3D model information 111. In addition, the part type classification unit 124 collates the extracted information with the “3D CAD model part attribute determination condition” of the part type information 112 to determine the part type for each component of the 3D model information 111. Classify.

  Next, the grouping setting unit 125 sets the grouping of the component parts (step S30). Specifically, the grouping setting unit 125 determines whether each component included in the 3D model information 111 is not required to be disassembled or whether it is an assembly. To do. More specifically, the group setting unit 125 identifies the component type of each component from the 3D model information 111. In addition, the grouping setting unit 125 identifies a record of the component type information 112 associated with the identified component type. Further, the grouping setting unit 125, when “disassembly unnecessary (purchased product)” and “partition (assembly)” are stored in the setting type 112d of the specified record calculation target, Set as. Note that the grouping setting unit 125, when “not calculated” is stored in the calculation target setting type 112d of the specified record, the grouping setting unit 125 selects the component of the associated component type. Is set to be “not subject to calculation”.

  Next, the inter-component adjacency generation unit 126 analyzes the inter-component adjacency for each component type, and generates an assembly graph for each component type (step S40). Specifically, the inter-part adjacency generation unit 126 analyzes the inter-part adjacency relation for each component included in the 3D model information 111 using a predetermined analysis method and analysis condition corresponding to the part type.

  Hereinafter, analysis of the adjacent relationship between components and generation of an assembly graph when the component types are “screw”, “wiring”, and “other general components” will be described.

  FIG. 6 is a diagram for explaining the inter-component adjacency relationship of “other general components”, and is a diagram illustrating an example of a 3D model of an assembly included in 3D CAD data. As shown in the figure, the assembly includes a left front plate 521 and a back side plate on a frame including a right front column 502, a right rear column 503, a left front column 504, and a left rear column 505 that connect the bottom plate 501 and the top plate 506. 531 and a top plate 511 are provided.

  The left side plate 521 is assembled with a left lower part 522, a left central part 523, and a left upper part 524, which are parts or a set. Further, a back side lower part 532, a back side center part 533, and a back side upper part 534 are assembled to the back side plate 531. Further, the back side center part 533 is assembled with a back side center part 535 and a back side left part 536. Further, an upper right part 512 and an upper left part 513 that are parts or a set are assembled to the upper surface plate 511. In FIG. 6, illustration of “screws”, “wiring”, and the like necessary for assembly is omitted to simplify the description.

  FIG. 7 is a view showing an assembly graph of the assembly shown in FIG. The assembly graph is a graph representation of the adjacency relationship between parts, and the assembly graph shown in FIG. 7 represents each part of the 3D model shown in FIG. Are connected by an edge (arc).

  In addition, the adjacent relationship between components is the concept which put together various restraint relationships regarding joining of components. For example, in the adjacency relationship between parts, the normal of a plane that is a part of a part and a plane that is a part of another part is within the allowable dimension range, and the distance between the planes is the allowable dimension. "Plane constraint" when the cylinders are adjacent to each other, and the cylinder and the cylinder are in a coaxial relationship within the allowable dimension, and the difference between the diameters of the cylinders is within the allowable dimension, "Cylinder constraint", the plane normal and There is “cylinder plane constraint” or the like when the axis of the cylinder is in a vertical relationship within the allowable dimension range, and the distance from the cylinder axis to the plane and the radius of the cylinder are within the allowable dimension range.

  In the assembly graph of FIG. 7, the group set by the group setting unit 125 is indicated by a dotted line. The assembly graph includes a bottom plate 501, a top plate 506, a right front column 502, a right rear column 503, a left front column 504, and a left rear column 505 in a 3D CAD component configuration tree included in 3D CAD data. In this example, the parent part 501S is set as a set (subassembly) by the set-up part 125.

  In the assembly graph of FIG. 7, in the 3D CAD component configuration tree, the top plate 511, the upper right component 512, and the upper left component 513 are configured as child components of the parent component 511S, and the parent component 511S is a part. The case where it is set as a group (subassembly) by the group setting unit 125 is shown. In the figure, a left side plate 521, a left lower part 522, a left center part 523, and a left upper part 524 are configured as child parts of the parent part 521S, and the parent part 521S is set as a group. The case where it sets as a group (subassembly) by the part 125 is shown. In the figure, the back side center part 533, the back side center part 535, and the back side left part 536 are configured as child parts of the parent part 533S, and the parent part 533S is grouped by the group setting unit 125. The case where it is set as (subassembly) is shown. In addition, the structure in a group is assembled before the work process of a total group.

FIG. 8 is a diagram showing an assembly graph in which the part of FIG. 7 is represented as a node. As shown in the figure, the assembly graph expresses each part as a node, so the graph representation is reduced compared to the assembly graph of FIG. In this way, when a group is expressed as one node, each group can be classified as an operation of assembling in a separate process. Therefore, the assembly graph can be greatly reduced and simplified by handling the assembly assembled in another process in the same manner as one component. As a result, it is possible to facilitate calculation processing such as searching for the decomposition order.

  Further, since the setting type of the calculation target of the component parts is specified in advance by the above-described classification of the component types (the above-described step S20), the target nodes to be calculated for each process can be limited. For example, if it is specified in the process of step S20 that the set 533S is a purchased item and is not subject to calculation, it can be excluded from the calculation sequence for assembly sequence generation described later. In this case, there are the following computational advantages.

  For example, assuming that the assembly graph of FIG. 8 represents the assembly process of the entire set for the 3D model of FIG. 6, the assembly sequence generation process using the assembly graph is performed in the assembly sequence generation process for each process described later. Is called. Further, after the assembly sequence generation process of the total group is executed, the assembly sequence generation process is sequentially performed on the group 511S, the group 521S, and the group 533S handled as the group. At this time, if the group 533S is a purchased item and can be grasped as not being calculated, the calculation of the group 533S can be skipped and the next group can be calculated. Can be omitted.

Next, a case where the component type is “screw” will be described.
FIG. 9 is a diagram for explaining the inter-component adjacency relationship of “screws”, and shows an example of a cross-sectional view of a 3D model included in 3D CAD data. The screw 601 has a screw hole in the component 604, and fastens the component 602 and the component 603 together therebetween.

  FIG. 10 is a view showing an assembly graph of “screw” shown in FIG. The analysis method of the adjacent relationship between components in the case of “screw” is basically the same method as “other general components”. Specifically, in the adjacency relationship between parts, the normal of a plane that is a part of a part and a plane that is a part of another part is within the allowable dimension range, and the distance between the planes Are adjacent to each other within the allowable dimension (planar constraint) (denoted as P on the edge in the figure), the cylinder and the cylinder are in a coaxial relationship within the allowable dimension, and the difference in diameter between the cylinders is within the allowable dimension. "Cylinder constraint" (denoted as C at the edge of the figure), the normal of the plane and the cylinder axis are perpendicular to each other within the allowable dimension range, and the distance from the cylinder axis to the plane and the radius of the cylinder are within the allowable dimension range There is a “cylindrical plane constraint” inside. In addition, P & C is described in the drawing for the edge where both the plane constraint and the cylindrical constraint exist.

  As shown in FIG. 10, the screw 601 has a cylindrical constraint with the hole of the component 602, and is adjacent in a plane, and therefore has a P & C adjacent relationship. The screw 601 is adjacent to the screw hole of the component 604 and the cylindrical constraint C, and the component 603 is adjacent to the hole of the component 603 and the cylindrical constraint C. In addition, since the part 603 is adjacent to the part 602 and the part 604 in a plane, there is an adjacent relationship of the plane constraint P. These adjacent relationships are the results of analysis based on the set values of the allowable dimension range set for analyzing the adjacent relationship of the component type “screw”.

  In the assembly graph examples of FIGS. 7 and 8, when P and C are added to the edges as in FIG. 10, all of the examples in FIGS. 7 and 8 are plane constraints, and P is added to all edges. Will do.

In this way, by analyzing the adjacent relationship between components, it is possible to derive the direction in which each component can be disassembled. For example, the screw 601 in FIG. 9 has a cylindrical constraint (adjacent relationship of C) with the component 602, the component 603, and the component 604, and the vector of the constraint element is the cylindrical axis direction of those holes. The screw 601 has a plane constraint (adjacent relationship of P) with the component 602, and the vector of the constraint element is the normal direction of the adjacent plane. From such an analysis result, it is possible to derive an operation in which the screw 601 is decomposed in the cylindrical axis direction and in the normal direction of the adjacent plane.

Next, a case where the component type is “wiring” will be described.
FIG. 11 is a diagram for explaining the adjacent relationship between components of “wiring”, and is a diagram illustrating an example of a cross-sectional view of a 3D model included in 3D CAD data. The wiring 701 is a wiring component that connects the component 703 and the component 704. The wiring 702 is a component that connects the component 703 and the component 706, and the component 705 is fixed to the wiring on the wiring path.

  FIG. 12 is a view showing an assembly graph of “wiring” shown in FIG. In the case of “wiring”, since the flexibility of the shape is different from that of “other general parts” and “screws”, an analysis method different from the analysis of their adjacency relationship is adopted. Specifically, a surface that is within the allowable dimension range set in the vicinity thereof is extracted from the surfaces constituting the component classified as “wiring” as the component type. Further, the closest surface (hereinafter sometimes referred to as “proximity surface”) among the parts including the surface is specified as an object having an adjacent relationship with “wiring”. Based on such “wiring” analysis technique and analysis conditions, an adjacency relationship indicated by W at the edge of the assembly graph in FIG. 12 is obtained.

  As shown in FIG. 12, the parts 703 and 704 have a surface that is close to the wiring 701 within a predetermined size range, and thus are target parts that are adjacent to the “wiring” (W at the edge in the figure). Described). In addition, the parts 703, 705, and 706 are target parts that are adjacent to the “wiring” because there is a part that has a surface close to the wiring 702 within a predetermined size range (edges in the drawing). To W). Since the parts 704 and 705 have a plane constraint (assumed to be known by the analysis method of the inter-part adjacency relationship of “other general parts”), P is described at the edge of the figure. In the “wiring” adjacency relationship, the normal direction of each adjacent surface is regarded as the disassembling direction of the wiring, and therefore it can be reversed and understood as the connection direction at the time of wiring work.

Here, for example, a case where an adjacency relationship between components is analyzed for a component whose component type is “wiring” using an analysis method of “other general components” will be considered. In this case, it may be analyzed that there is a planar or cylindrical adjacency relationship between the wiring 701 and the wiring 702. However, even if the normal direction is regarded as the decomposition direction from these adjacency relationships, the direction is not useful information for deriving the assembly order. Therefore, in the case of a component type whose shape can be flexibly deformed, such as a component whose component type is “wiring”, the above-described “wiring” inter-component adjacency analysis method is used. By setting dimensional tolerances according to the values, it is possible to acquire an adjacency useful for analyzing assembly operations and generating assembly sequences.

  Heretofore, the process of step S40 has been described. Note that the 3D model information generation unit 123 sets the adjacent relationship between the components of each component type analyzed in step S40 to each item (constraint) associated with the “adjacent relationship between components” of the 3D model information 111. Type, constraint element type, etc.).

  Next, the calculation component configuration tree generation unit 127 generates a calculation component configuration tree (step S50). This process is a process of organizing each component into an assembly unit parent-child relationship for the assembly graph generated by the 3D CAD component configuration tree. For example, in step S40 described above, an assembly graph is generated using a 3D CAD component configuration tree or the like, and the set is indicated by a dotted frame. However, in the 3D CAD part configuration tree, a parent part can be created and an arbitrary child part can be placed thereunder without necessarily considering the assembly unit, so the parts are included in all the child parts belonging to the hierarchy of the parent part. There is no guarantee that there is an adjacent relationship. Therefore, the calculation component configuration tree generation unit 127 generates a calculation component configuration tree and arranges each component into a parent-child relationship having an adjacent relationship.

  FIG. 13 is a flowchart showing the details of the calculation component configuration tree generation process. When such processing is started, the calculation component configuration tree generation unit 127 aggregates the same name components having the same adjacent relationship (step S510). Specifically, the calculation component configuration tree generation unit 127 extracts a component having the same name from the 3D CAD component configuration tree, and whether the components adjacent to the component are the same combination and the plane constraint direction vectors are the same. Determine whether or not.

  In addition, when it is determined that the parts adjacent to the part are the same combination and the plane constraint direction vectors are the same, the calculation part configuration tree generation unit 127 determines that the parts are the same assembly work. In this case, the calculation component configuration tree generation unit 127 newly creates a parent component node for aggregating the same name component in the 3D CAD component configuration tree, and displays the components to be aggregated under the parent node hierarchy. Deploy. It should be noted that processing that straddles the hierarchy between the parent parts is not performed for the parts below the parent part hierarchy in which the grouping based on the 3D CAD part configuration tree is set.

  Next, the calculation component configuration tree generation unit 127 performs the processing from step S520 to step S540 in order from the terminal layer to the upper layer for each parent component. In addition, the calculation component configuration tree generation unit 127 performs the process of step S550 in order from the upper layer to the end layer. Below, these processes are demonstrated in detail using FIGS. 14-17.

  FIG. 14 is a diagram illustrating an example of a 3D CAD part configuration tree, an example of a 3D model corresponding to the 3D CAD part configuration tree, and an assembly graph of the 3D model. The dotted line frame of the assembly graph indicates the parent-child relationship by the 3D CAD component configuration tree.

  Here, the calculation component configuration tree generation unit 127 moves up the hierarchy of isolated components based on the adjacent relationship between the components (step S520). Specifically, the calculation part configuration tree generation unit 127 determines whether or not there is an isolated part in “SubAsm56” which is the hierarchy on the terminal side. In this case, since there is no isolated component, the calculation component configuration tree generation unit 127 determines whether or not there is an isolated component in the “SubAsm34567” that is the upper layer. In this case, since Parts 3 is isolated, the calculation component configuration tree generation unit 127 performs a process of moving up the hierarchy of Parts 3.

  FIG. 15 is a diagram illustrating the 3D CAD component configuration tree after the processing in step S520. As shown in the figure, the hierarchy of Parts 3 is moved up, and such components are arranged below the hierarchy of TopAssy.

  Next, when there are two or more subgraphs (partial assembly graphs), the calculation component configuration tree generation unit 127 newly generates a parent component in the hierarchy of the parent components and arranges the component for each subgraph. (Step S530). Note that the case where there is a subgraph is a case where, for example, in FIG. 15, there are Parts 3 and another adjacent component adjacent thereto. In this example, since there are no two or more subgraphs, the calculation component configuration tree generation unit 127 moves the process to step S540.

  In step S540, when there is no child part under the hierarchy of the parent part to be processed, the calculation part configuration tree generation unit 127 deletes the parent part. This is because there is no point in leaving a hierarchy with no child parts below the hierarchy.

  Next, when the adjacent relationship of the child parts is only one parent part, the calculation part configuration tree generation unit 127 inserts the child part below the hierarchy of the parent part (step S550). For example, in the 3D CAD part configuration tree of FIG. 15, since Parts 8 below the TopAssy hierarchy has an adjacency relationship only to SubAsm 56, the calculation part configuration tree generation unit 127 sets Parts 8 to SubAsm 56 having the only adjacency relationship. Transfer to the lower level. As a result of this incorporation, SubAsm56 in FIG. 15 becomes SubAsm568 and SubAsm4567 becomes SubAsm45678.

  In the 3D CAD component configuration tree of FIG. 15, since Parts 9 below the TopAssy hierarchy is adjacent only to SubAsm45678, the calculation component configuration tree generation unit 127 includes a hierarchy of SubAsm45678 that is adjacent to Parts9. Transfer to the bottom. As a result of this incorporation, SubAsm45678 in FIG. 15 becomes SubAsm456789.

  Further, in the 3D CAD component configuration tree of FIG. 15, since the Parts 7 below the TopAssy hierarchy are adjacent only to the SubAsm 568, the calculation component configuration tree generation unit 127 includes the SubAsm 568 hierarchy in which the Parts 7 is adjacent. Transfer to the bottom. As a result of this incorporation, SubAsm568 in FIG. 15 becomes SubAsm5678.

  FIGS. 16A to 16C are diagrams showing assembly graphs when Parts 8, Parts 9, and Parts 7 are incorporated into a layer having an adjacent relationship.

  FIG. 17 is a diagram showing the 3D CAD component configuration tree of FIG. 14 and the calculation component configuration tree in which the parent-child relationships are organized.

  As described above, the calculation component configuration tree generation unit 127 arranges the parent-child relationship of the 3D CAD component configuration tree by performing the processing of step S520 to step S550, thereby calculating components used for assembly sequence processing described later. Generate a configuration tree. When the calculation part configuration tree generation unit 127 ends the process of step S550, the process proceeds to step S60 (FIG. 5).

  Returning to FIG. In step S60, the order constraint setting unit 128 sets an order constraint. Here, the order restriction will be described with reference to FIGS. 9 and 10 showing the adjacent relationship between components when the component type is “screw”. The screw 601 is adjacent to the component 602 in a plane. The screw 601 is not assumed to be assembled prior to the component 602 in the assembling order. For this reason, the order constraint setting unit 128 sets the order constraint “attach the screw 601 after the component 602” using the order constraint information 114 defining such an order constraint. As a result, the order constraint is set such that the parts that are adjacent to each other in the plane constraint are assembled first, and “screws” are assembled later.

  Further, in FIGS. 11 and 12 showing the adjacent relationship between components when the component type is “wiring”, it is not assumed that the wiring 701 and the wiring 702 are assembled before those adjacent components. Therefore, the order constraint setting unit 128 uses the order constraint information 114 that defines such an order constraint to set an order constraint that “assembles a wiring proximity component first and then assembles a wiring later than that”. . In addition, although the example of "screw" and "wiring" was shown as an example, in other parts classification, when the order of assembling with adjacent and adjacent parts is clear, order restrictions may be set similarly.

Next, the assembly sequence generation unit 129 generates an assembly sequence (step S70).
FIG. 18 is a flowchart showing details of the assembly sequence generation process. Note that the assembly sequence generation unit 129 employs an assembly sequence generation method disclosed in, for example, Japanese Patent Application Laid-Open No. 2012-14569 or WO2015 / 177855A1, and disassembles using the assembly graph for each component type generated in step S40. Generate disassembly directions and disassembly sequences while identifying possible directions. Further, the assembly sequence generation unit 129 performs reverse conversion of the disassembly order and the disassembly direction to generate the assembly order and the assembly direction. In addition, the assembly sequence generation unit 129 calculates an evaluation value for each part and group in the generation of the assembly sequence, and determines an assembly order according to the evaluation value. In addition, it is efficient that the assembly order follows the assembly order when similar parts have been assembled in the past. Therefore, the assembly sequence generation unit 129 weights the evaluation value according to the order when the past similar parts are assembled. Below, the detail of an assembly sequence production | generation process is demonstrated.

  The assembly sequence generation unit 129 repeatedly performs the processes of steps S710 to S790 for each process (for each set) using the calculation component configuration tree. Specifically, the assembly sequence generation unit 129 specifies a part or a group included in the hierarchy for each hierarchy, and generates an assembly sequence for each hierarchy. More specifically, the assembly sequence generation unit 129 generates an assembly sequence for the assembly process of the total set corresponding to the highest hierarchy of the product.

  In addition, the assembly sequence generation unit 129 sequentially selects a set handled in the component configuration, and generates the assembly sequence using the assembly graph as a component configuration to be calculated using the corresponding assembly graph. The assembly sequence generation unit 129 sequentially generates an assembly sequence from a higher hierarchy to a lower hierarchy, and stores the ID and name of the assembly for which the assembly sequence has been generated.

  First, the assembly sequence generation unit 129 determines whether the selected group is a calculation target group (step S710). Specifically, the assembly sequence generation unit 129 determines whether or not the relevant group is set to be excluded from the calculation target in the grouping setting process (step S30). If the assembly sequence generation unit 129 determines that the assembly is not a calculation target (Yes in step S710), the assembly sequence generation unit 129 skips generation of the assembly sequence and calculates the next unit. On the other hand, when it is determined that the group is not a calculation target group (No in step S710), the assembly sequence generation unit 129 moves the process to step S720. Note that the determination process in step S710 may be omitted in the assembly process of the total set, that is, in the highest hierarchy.

  Next, the assembly sequence generation unit 129 determines whether the selected group is a calculated group (step S720). Specifically, the assembly sequence generation unit 129 determines whether or not the selected group has the same name as the group that has already performed the processes of steps S710 to S790. If it is determined that the set has already been calculated (Yes in step S720), the assembly sequence generation unit 129 skips generation of the assembly sequence and calculates the next set. On the other hand, when it determines with it not being a calculated group (No in step S720), the assembly sequence production | generation part 129 transfers a process to step S730. Note that the determination process in step S720 may be omitted in the assembly process of the total set, that is, in the highest hierarchy.

  Next, the assembly sequence generation unit 129 sets a base part (step S730). Specifically, the assembly sequence generation unit 129 refers to the base part (flag) of the 3D model information 111 and extracts the parts having the base part flag among the parts constituting the selected set. Base parts. In addition, when the flag of the base part is not specified for any part of the selected part set, the assembly sequence generation unit 129 displays “parts with large volume, surface area, and maximum length of the part attributes of the 3D model information 111. The base part is set based on the predetermined calculation condition information 115 such as “prioritize the part” or “prioritize the part having a lot of adjacent relations between the parts.

  Next, the assembly sequence generation unit 129 sets a work step (step S740). Here, the setting of the work step will be described with reference to FIG. 19 created as an example of an assembly graph in which a base part and a representation of the work step are added based on the 3D model of FIG. 6 and the assembly graph of FIG.

  FIG. 19 is a diagram illustrating an example of an assembly graph to which base parts and work step expressions are added. As illustrated, the bottom plate 501, the top plate 506, the right front column 502, the right rear column 503, the left front column 504, and the left rear column 505 are part of the assembly graph of FIG. The back side center part 533, the back side center part 535, and the back side left part 536 are a set 533S.

  In step S740, the assembly sequence generation unit 129 selects the group 501S as a base component by using the component attribute of the 3D model information 111 and information on the adjacent relationship between components. Further, the assembly sequence generation unit 129 sets the base part as the first work step because the base part is the part that is initially placed during assembly. As for the other work steps, the assembly sequence generation unit 129 assigns them based on the adjacent relationship between components and the component attributes with respect to the set base component.

  In the example of FIG. 19, the assembly sequence generation unit 129 refers to the adjacency relationship between parts, and performs work steps from the grouping on the position and the adjoining direction to the base part (X-axis direction, Y-axis direction, Z-axis direction). Set. In the setting of this work step, the assembly sequence generation unit 129 refers to the 3D model information 111 and determines the priority of the arrangement relationship such as the number of parts, the total volume of the parts, the center of gravity of the whole parts, and the bounding box of the whole parts. Identify and number work steps. For example, the assembly sequence generation unit 129 gives priority to the assembly work in order of the overall volume and the center of gravity arranged on the lower side, and assigns the work steps.

  Next, the order constraint setting unit 128 sets an order constraint (step S750). Specifically, the order constraint setting unit 128 sets the order constraint set based on the adjacent relationship for each component type in the process of step S60.

  Then, the assembly sequence generation unit 129 calculates a node evaluation value (step S760). Here, the node evaluation value is an index similar to the node evaluation value used in the assembly sequence generation method disclosed in, for example, WO2015 / 177855A1. As one element of the node evaluation value, a work step of the base part is added. By adding a work step, the priority order of the assembly graph to be calculated can be limited, and the calculation can be facilitated in the assembly sequence generation process for a large model.

  In the above-described assembly sequence generation method, first, in order to search the disassembly order, a disassembly order that is the reverse order of the set work steps is added as a node evaluation value, and a disassembly order / disassembling part described later is searched.

  Next, the assembly sequence generation unit 129 performs disassembly order search / disassembly-possible component determination (step S770). Specifically, the assembly sequence generation unit 129 uses the assembly graph and the 3D model information 111 to determine whether or not there is interference between components in the disassembly operation. In addition, the assembly sequence generation unit 129 performs a disassembly order search and a disassembleable part determination by deriving a disassembly motion vector without interference. In this process, as described with reference to FIGS. 6 to 12, based on the direction vector of the constraint element obtained from the analysis of the adjacency relationship for each component type, a decomposable direction vector of the component is derived, and the disassembly direction is determined. The presence or absence of interfering parts is derived.

The assembly sequence generation unit 129 excludes the interference if the interference determination threshold set for each component type is within an allowable value. Also, interference with a component type that may be excluded in the component type set for each component type is excluded. For example, when the component type is “wiring”, the shapes of the “wiring” can be flexibly deformed, and the interference is ignored.

  In addition, the assembly sequence generation unit 129 performs interference determination for each disassembly direction vector in all disassembly direction vectors obtained from the adjacent relationship between components. Such interference determination needs to satisfy a preset order constraint and base component setting conditions. Therefore, when an inconsistency occurs between the interference determination result and the order constraint condition, the assembly sequence generation unit 129 generates a grouping plan for solving the inconsistency.

  FIG. 20 is an explanatory diagram when a contradiction arises from the order restriction and the interference determination. Here, the part 810 is a base part, and is preset as a part to be finally disassembled. At this time, it is determined that the screw 801 and the screw 802 can be disassembled in the left direction in the figure. Further, the screw 801 and the screw 802 have an order restriction between the part 821 and the screw 801 and the screw 802. Further, the component 822 has no screw and planar adjacency, and can be disassembled in the right direction in the figure. The direction in which the part 821 can be disassembled after disassembling the part 822 is determined to be the right direction in the figure from the interference determination. However, “Before disassembling the part 821, the screws 801 and 802 are disassembled (reverse assembly). If there is an order restriction of “), a contradiction that the part 821 cannot be disassembled occurs.

  When such a contradiction occurs, the assembly sequence generation unit 129 extracts a part having the order constraint in which the contradiction has occurred, and based on the adjacent relationship between the parts including the part having the order constraint, the related part Generate a grouping plan that puts everything together.

Specifically, when the component 821 is to be disassembled, the assembly sequence generation unit 129 extracts the order constraint related to the component 821 because there is a contradiction between the disassembly proposal based on the interference determination and the order constraint. As a result, the assembly sequence generation unit 129 grasps “order restriction between the component 821 and the screw 801 and the screw 802”. Then, the assembly sequence generation unit 129 analyzes the adjacent relationship between the component 821 including the extracted order-constrained component, the screw 801, and the screw 802, and grasps the adjacent relationship between the screw component and the component 822. Then, the assembly sequence generation unit 129 generates a grouping plan in which the part 821, the part 822, the screw 801, and the screw 802 are grouped together based on the analysis result.

For the parent node (122S) of such a grouping plan, if the resolvable direction is calculated again from the adjacent relationship between the parts and the order constraint, it can be determined that it can be decomposed rightward in the figure without contradiction. Note that the assembly sequence generation unit 129 may present to the user the interference and order restrictions that caused the problem, the grouping plan generated to solve the contradiction, and the disassembly result that can be disassembled. .

  Next, the assembly sequence generation unit 129 performs conversion to an assembly order / operation (step S780). Specifically, the assembly sequence generation unit 129 generates the assembly order / operation converted into the assembly operation by inverting the generated disassembly order into the assembly order and inverting the sign of the disassembly motion vector. Note that a plurality of assembly order plans may be derived according to the calculation condition information 115.

  Next, the assembly sequence generation unit 129 determines whether or not calculation of all processes has been completed (step S790). If it is determined that calculation of all processes has not been completed (No in step S790), the assembly sequence generation unit 129 performs the process of step S710 on an unprocessed process (group). On the other hand, when it is determined that the calculation of all the processes (groups) has been completed (Yes in step S790), the assembly sequence generation unit 129 ends the process of this flow, and the process proceeds to step S80 (FIG. 5). Transition.

  The assembly sequence generation process has been described above. According to such assembly sequence generation processing, the components below the hierarchy are sequentially expanded from the highest level of the calculation component configuration tree, and an assembly sequence that takes into account the set base parts and work steps is generated for each process. can do.

  Returning to FIG. Next, the 3D animation generation unit 130 generates a 3D animation (step S80). Specifically, the 3D animation generation unit 130 uses the assembly sequence generated in step S70 to generate a 3D model animation indicating an assembly order for each process in the assembly.

  Next, the work instruction generating unit 131 outputs a process-specific 3D work instruction (step S90). Specifically, the work instruction generation unit 131 displays, via the output processing unit 122, a 3D work instruction screen for each process including a part configuration tree including an assembly order, a 3D model of an assembly, and a text work instruction. Information is displayed on the output device 302.

  FIG. 21 is an example screen 900 showing an example of a process-specific 3D work instruction. As shown in the figure, the process-specific 3D work instruction includes an operation menu display field 901 that displays a predetermined operation menu, an assembly order display field 902 that displays an assembly order for each process in the form of a part configuration tree, It has a 3D model display field 903 that displays the 3D model, and an instruction content display field 904 that displays the contents of the work instruction as text.

  The operation menu display column 901 is a column for displaying a predetermined operation menu. The operation menu includes, for example, a file 901a, 3D model selection 901b, process selection 901c, and animation reproduction operation button 901d. In addition, if the input reception part 121 receives the operation input to the operation menu display column, it will output the instruction | indication according to operation with respect to the corresponding predetermined function part.

  For example, the operation input to the file 901a enables, for example, an operation of selecting and expanding a predetermined file or saving a file edited on the screen. When receiving such an operation input, the input receiving unit 121 outputs a display information generation instruction for displaying the selected file on the screen to the output processing unit 122. When receiving a file save instruction by an operation input, the input receiving unit 121 outputs an instruction to save the designated file in the storage unit 110 to a predetermined function unit (not shown).

  The operation input to the 3D model selection 901b is to highlight the corresponding parts on the 3D model of the assembly displayed in the 3D model display field 903 when, for example, a part on the part configuration tree is selected. to enable. Further, for such operation input, for example, only the part selected on the part configuration tree is displayed in the 3D model display field 903 or only the part other than the selected part is displayed in the 3D model display field 903. When such an operation input is received, the input receiving unit 121 outputs the corresponding part of the assembly displayed in the 3D model display field 903 so that the corresponding part is highlighted or only the corresponding part (or only the non-applicable part) is displayed. The processing unit 122 is instructed.

  Further, the operation input to the process selection 901c enables display switching of the assembly process selected in the part configuration tree displayed in the assembly order display field 902. When receiving such an operation input, the input receiving unit 121 displays information regarding the selected assembly process.

  An operation input to the animation playback operation button 901d enables playback, stop, reverse playback, and the like of 3D animation information indicating the assembly operation. When receiving such an operation input, the input receiving unit 121 instructs the output processing unit 122 to control the operation of the 3D animation according to the operation. Note that the output processing unit 122 may highlight a part on the part configuration tree corresponding to the part operating in the 3D animation. Further, the output processing unit 122 may display a trajectory of an operating part, an arrow indicating an operation direction, and the like together with the 3D animation.

  The assembly order display column 902 is a display column of a part configuration tree indicating an assembly order for each process. Specifically, the work instruction generation unit 131 generates display information of the component configuration tree for calculation generated in step S50 via the output processing unit 122 and displays the display information in the assembly order display field 902.

  The 3D model display field 903 is a display field for 3D animation information for assembling the 3D model of the assembly. Specifically, the work instruction generating unit 131 displays the 3D animation information generated in step S80 in the display column via the output processing unit 122.

  The instruction content display field 904 is a display field for displaying the contents of work instructions based on text information. For example, the work instruction generation unit 131 displays a part on the selected part configuration tree, a part operating on the 3D animation, a part to which the part is assembled, and the like in the calculation part configuration tree and the 3D model information 111. Use to specify. In addition, the work instruction generation unit 131 generates text information of work contents including the name of the part being selected or operated and the name of the part to be assembled. In addition, the work instruction generation unit 131 displays the generated text information in the instruction content display field 904 via the output processing unit 122.

  The work instruction generation device according to the present embodiment has been described above. According to such a work instruction generation device, a more efficient work instruction can be generated. In particular, according to the work generation device, the adjacency relationship between components is analyzed for each component type, so that information necessary for generating the assembly sequence can be accurately acquired. In addition, the graph network (assembly graph) can be simplified by setting a group consisting of a plurality of parts, and as a result, the calculation processing related to the search processing of the assembly order can be speeded up.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  In the above description, control lines and information lines indicate what is considered necessary for the description, and not all control lines and information lines on the product are necessarily shown. In practice, it can be considered that almost all the components are connected to each other.

DESCRIPTION OF SYMBOLS 100 ... Work instruction | indication production | generation apparatus, 200 ... 3DCAD apparatus, N ... Network, 110 ... Memory | storage part, 111 ... 3D model information, 112 ... Part classification information, 113 ... Analysis Calculation program, 114... Order constraint information, 115... Calculation condition information, 116... Case information for which assembly order has been created, 120. Output processing unit, 123... 3D model information generation unit, 124... Part type classification unit, 125... Grouping setting unit, 126. Component configuration tree generation unit, 128... Order constraint setting unit, 129... Assembly sequence generation unit, 130... 3D animation generation unit, 131 ... work instruction generation unit, 140.・ ・Input device, 302 ... output device, 303 ... external storage device, 304 ... arithmetic unit, 305 ... main memory, 306 ... communication device

Claims (12)

A storage unit that stores 3D model information that is geometric information related to the components and structure of an assembly, and a component type information that defines a classification condition of a component type of the component and a component that is a combination of the components;
Using the 3D model information and the component type information, a component type classification unit that classifies the component type and the component type of the part set;
Using the 3D model information and the part type information, a grouping setting unit that sets a group for the component part;
An inter-component adjacency generation unit that analyzes an adjacency relationship of the component parts using a predetermined analysis method according to the component type, and generates an assembly graph indicating an adjacency relationship between the components for each of the component types;
An assembly sequence generation unit configured to generate an assembly order of the component parts using the assembly graph. The work instruction generation device according to claim 1,
Using a component configuration tree indicating the adjacent relationship of the component parts, further comprising a calculation component configuration tree generation unit that organizes the component parts into a parent-child relationship of an assembly unit;
The calculation component configuration tree generation unit includes:
Aggregating the components of the same adjacency,
In the part configuration tree, when the adjacency relationship of the child parts among the component parts belongs only to a specific parent part hierarchy, the child parts are incorporated into the hierarchy of the parent part by inserting the child parts into the hierarchy of the parent parts. A work instruction generating apparatus, characterized by generating an organized calculation component configuration tree. The work instruction generation device according to claim 2,
The assembly sequence generation unit
A work instruction generating apparatus, wherein the assembly order of the component parts is generated using the assembly graph corresponding to the calculation part component tree. The work instruction generation device according to claim 3,
The assembly sequence generation unit
A work instruction generation apparatus, characterized in that the assembly order of the component parts is generated using order constraint information defining constraints on the assembly order of the component parts. The work instruction generation device according to claim 4,
The assembly sequence generation unit
A work instruction generation apparatus, characterized in that a disassembling direction of the component parts is derived based on the adjacent relationship between the parts, and interference between the component parts is determined in the disassembling direction. The work instruction generation device according to claim 5,
The assembly sequence generation unit
If there is a contradiction between the order constraint defined in the order constraint information and the interference determination, a new grouping plan that resolves the contradiction is generated,
The grouping setting unit
A work instruction generating apparatus, wherein the grouping plan is set as a new group. The work instruction generation device according to claim 6,
A work instruction generating apparatus, further comprising a 3D animation generating unit configured to generate 3D animation information indicating an assembly order of the component parts by a three-dimensional animation. The work instruction generation device according to claim 7,
A work instruction generation device further comprising a work instruction generation unit that generates 3D work instruction information for each process including at least the calculation component configuration tree, the 3D animation information, and text information indicating work contents. . The work instruction generation device according to claim 8,
An output processing unit for generating screen information to be displayed on the output device;
The output processing unit
A work instruction generation device, characterized in that screen information of the 3D work instruction information for each process is generated and displayed on the output device. The work instruction generation device according to claim 1,
The inter-component adjacency generation unit
When analyzing the adjacent relationship of the said component, the work instruction generation apparatus characterized by making the analysis method of the said flexible component and the said non-flexible component differ. The work instruction generation device according to claim 1,
The work instruction generation apparatus according to claim 1, wherein the component parts include at least a screw part and a wiring part. A work instruction generation method performed by a work instruction generation device,
The work instruction generation device includes:
Storing 3D model information that is geometric information related to components and structure of an assembly, and part type information that defines a classification condition of a part type of the component and a part that is a combination of the components;
A component type classification step for classifying the component type and the component type of the set using the 3D model information and the component type information;
Using the 3D model information and the part type information, a grouping setting step for setting a group for the component part;
An inter-component adjacency generation step for analyzing an adjacency relationship of the component parts using a predetermined analysis method according to the component type, and generating an assembly graph indicating an adjacency relationship between the components for each of the component types;
An assembly sequence generation step of generating an assembly sequence of the component parts using the assembly graph.

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