JP7299484B2 - Information processing device and work order constraint generation program - Google Patents

Description

The present invention relates to an information processing device and a work order constraint generation program.

Techniques for automatically generating an order of a plurality of pieces of work information for manufacturing a product including a plurality of parts have been disclosed (see Patent Documents 1 and 2, for example).

JP 2015-171736 A JP-A-8-235236

If the order of work information is generated without setting the work order constraint, the order that cannot be assembled may be generated. Therefore, it is desirable to automatically generate work order constraints before automatically generating the order of work information. However, it takes a lot of man-hours to automatically generate work order constraints.

In one aspect, an object of the present invention is to provide an information processing apparatus and a work order constraint generation program capable of efficiently and automatically generating work order constraints.

In one aspect, the information processing device includes a plurality of pieces of work information for assembling a product including a plurality of parts, which are work piece information that is information of work pieces on which the work is performed, and work destinations of the work pieces. an acquisition unit that acquires work information including work information that is information of a certain work work part and information on the completed state of the product ; First work information in which a predetermined part is designated as work part information and second work information in which the predetermined part is designated as work-receiving part information are extracted, and the first work information is extracted as the second work information. and a generation unit that generates work order constraint information to be specified for the preceding work .

Work order constraints can be automatically generated efficiently.

(a) to (e) are diagrams for explaining work order constraints. 1A is a functional block diagram showing the overall configuration of an information processing apparatus according to a first embodiment; FIG. 1B is a block diagram illustrating the hardware configuration of the information processing apparatus; FIG. (a) is an input work list, and (b) is a diagram illustrating contact surfaces extracted in a 3D model. (a) to (d) are diagrams illustrating first setting conditions. (a) to (c) are diagrams illustrating second setting conditions. (a) to (c) are diagrams illustrating second setting conditions. (a) to (d) are diagrams illustrating third setting conditions. (a) to (d) are diagrams illustrating third setting conditions. (a) and (b) are diagrams illustrating generation of a work order. FIG. 3 is a diagram illustrating a flowchart representing the flow of each process executed by an information processing apparatus;

Since the environment surrounding the production line changes from moment to moment, the frequency of line configuration planning (examination and change) also increases. However, line planning largely depends on the intuition and tricks of skilled process designers, and there are few standard design methods. Therefore, recently, tools for automatically generating process plans are often used.

When planning a process using an automatic generation tool, work order constraints are generated in advance so that assembly is possible. At present, work order constraints are mostly generated manually. Therefore, not only does it take a lot of man-hours to generate work sequence constraints, but there are also many plans that cannot be assembled due to errors in the generation of work sequence constraints.

A work order constraint is a constraint on the order in determining the order of work information (hereinafter referred to as work order). Violating a work order constraint produces an infeasible work order. Here, an example of work order constraints will be described. As exemplified in FIG. 1A, work information 1 (Job1) represents the work of attaching a cover. Work information 2 (Job2) represents the work of tightening the screw 1 to the cover. Work information 3 (Job3) represents the work of tightening the screw 2 to the cover. Work information 4 (Job4) represents the work of attaching a sticker to the cover. Since screws 1 and 2 are parts for fixing the cover, Job2 and Job3 must be performed after Job1. Since Job1 and Job4 are independent of each other, either one may be performed first.

In this case, for example, as illustrated in FIG. 1B, Job 1 is performed as work number #1. Next, Job 2 is performed as work number #2, and Job 3 is performed as work number #3. Next, Job 4 is performed as work number #4. For example, as illustrated in FIG. 1C, Job 1 is performed as work number #1, Job 3 is performed as work number #2, Job 4 is performed as work number #3, and Job 2 is performed as work number #4. may be done.

However, as exemplified in FIG. 1(d), Job2 cannot precede Job1. Also, as exemplified in FIG. 1(e), Job2 and Job3 cannot precede Job1. Thus, violating a work order constraint may produce an infeasible work order.

As a method of automatically generating work order constraints, there is a method of setting work order constraints by utilizing a 3D model of a finished product and examining whether or not a disassembly route for the target work can be generated. However, it takes a lot of time to search for the possibility of disassembly in six directions while moving all the component parts, and to perform the search for each disassembled state. Therefore, in the following embodiments, an information processing apparatus and a work order constraint generation program that can efficiently generate work order constraints by adding the positional relationship and setting conditions of each component without moving the components. explain.

FIG. 2A is a functional block diagram showing the overall configuration of the information processing apparatus 100 according to the first embodiment. As illustrated in FIG. 2A, the information processing device 100 functions as a 3D model acquisition unit 10, a work list acquisition unit 20, a contact surface extraction unit 30, an order constraint generation unit 40, a work order generation unit 50, and the like. .

FIG. 2B is a block diagram illustrating the hardware configuration of the information processing apparatus 100. As illustrated in FIG. As illustrated in FIG. 2B, the information processing apparatus 100 includes a CPU 101, a RAM 102, a storage device 103, a display device 104, an input device 105, and the like.

A CPU (Central Processing Unit) 101 is a central processing unit. CPU 101 includes one or more cores. A RAM (Random Access Memory) 102 is a volatile memory that temporarily stores programs executed by the CPU 101, data processed by the CPU 101, and the like. The storage device 103 is a non-volatile storage device. As the storage device 103, for example, a ROM (Read Only Memory), a solid state drive (SSD) such as a flash memory, a hard disk driven by a hard disk drive, or the like can be used. The storage device 103 stores a work order constraint generation program. The display device 104 is a liquid crystal display, an electroluminescence panel, or the like, and displays processing results of the information processing device 100 and the like. The input device 105 is an input device such as a keyboard and mouse. In this embodiment, each unit in FIG. 2(a) is implemented by executing a program, but may be implemented by hardware such as a dedicated circuit.

The 3D model acquisition unit 10 acquires a 3D model as an example of information on the completed state of a product including multiple parts. The 3D model is 3D CAD data or the like, and is input via the input device 105, for example. The work list acquisition unit 20 acquires a work list listing a plurality of pieces of work information for assembling the product. The work list is input via the input device 105, for example. The work list contains work component information that is information about the work component on which the work is to be performed, work component information that is information on the work component that is the work destination of the work component, and work component information that is to be worked on the work component. work information (Job) representing the contents, and the like. The work part and the work part are set in advance by the designer of the product. As an example, in each work, the coordinates of the work piece are fixed by an arm robot or the like. For example, a working part is attached, pasted, screwed, or otherwise moved to the part to be worked on.

The contact surface extraction unit 30 extracts the contact surface between the work part and the work part from the 3D model acquired by the 3D model acquisition unit 10 . FIG. 3A is a diagram exemplifying the work list acquired by the work list acquisition unit 20. As shown in FIG. FIG. 3B is a diagram showing the contact surface extracted by the contact surface extraction unit 30 in the 3D model acquired by the 3D model acquisition unit 10. As shown in FIG. The contact surfaces are hatched.

The job information 1 (Job1) represents the job of fitting the part a1 to the part a3. In Job1, the work part is part a1, and the work part is part a3. The job information 2 (Job2) represents the job of connecting the part a2 to the part a1. In Job2, the work part is part a2, and the work part is part a1. The work information 3 (Job3) represents the work of connecting the part a3 to the part B. FIG. In Job3, the work part is part a3, and the work part is part B.

The work information 4 (job4) represents the work of attaching the part c1 to the part B. FIG. In Job4, the work part is part c1, and the work part is part B. FIG. The job information 5 (Job5) represents the job of attaching the part c2 to the part c1. In Job5, the work part is part c2 and the work part is part c1. The job information 6 (Job6) represents the job of attaching the part c3 to the part c1. In Job6, the work part is part v3, and the work part is part c1.

The job information 7 (Job7) represents the job of screwing the part d1 to the part c1. In Job7, the working part is part d1, and the parts to be worked are part c1 and part B. The job information 8 (Job8) represents the job of screwing the part d2 to the part c1. In job8, the work part is part d2, and the work parts are part c1 and part B.

The work information 9 (Job9) represents the work of attaching the part E to the part B. FIG. In Job9, the work part is part E and the work part is part B. The work information 10 (job10) represents the work of attaching the part f1 to the part B. FIG. In Job10, the work part is the part f1 and the work part is the part B. FIG. The work information 11 (Job11) represents the work of attaching the part f2 to the part B. FIG. In Job11, the part work is part f2, and the part to be worked is part B. FIG.

The order constraint generator 40 creates work order constraints from the 3D model and the work list. The work order generator 50 generates a work order, which is the order of each piece of work information, so as not to violate the work order constraints generated by the order constraint generator 40 . Details of the generation of work order constraints by the order constraint generation unit 40 will be described below.

(Setting condition 1)
The order constraint generation unit 40 determines whether or not there is order constraint work for each piece of work information based on setting condition 1 .

The work list includes work information in which a plurality of parts are registered in the work target part information column. For example, as illustrated in FIG. 4A, in Job7, part c1 and part B are registered in the work part information. As illustrated in FIG. 4B, the part d1 is a screw for fixing the part c1 to the part B. As shown in FIG. Therefore, Job7 can only be executed after Job4 in which part c1 is attached to part B.

Therefore, in the case of work information (such as fastening work) in which a plurality of parts are registered in the work part information column of the work list, the order constraint generation unit 40 registers the work part information of the target work as work part information. Extract all work information In the example of FIG. 4C, in addition to Job7, Job8 for screwing the part d2 to the part c1 is extracted. Even this Job8 can be executed only after the part c1 is attached to the part B, as illustrated in FIG. 4(d). Therefore, the order constraint generator 40 sets Job4 as a preceding work of Job7 and Job8.

(Setting condition 2)
The order constraint generation unit 40 determines whether or not there is order constraint work for each piece of work information based on setting condition 2 .

In addition, the order constraint generation unit 40 focuses on work information in which the same part included in the work list is registered singly in the work part information field and the work part information field. For example, as illustrated in FIG. 5A, in Job1, part a1 is registered in the work part information, and in Job2, part a1 is registered in the work part information. As illustrated in FIG. 6(a), the part a1 is fitted to the part a3, and the part a2 is connected to the part a1.

In such a case, it is preferable to set the component parts of the work target part formed of a plurality of parts before attaching the part (before the posture is fixed). In the example of FIG. 5A, it is preferable to attach the part a2 to the part a1. Therefore, in the case of work information in which the same single component is registered in both the work component information column and the work target component information column, the order constraint generation unit 40 converts the work information registered as the work target component information into the work information. Set as a preceding work of work information registered as part information. In the example of FIGS. 5A and 6A, the order constraint generator 40 sets Job2, which connects part a2 to part a1, as a preceding work of Job1, which connects part a1 to part a3. .

Similarly, in the examples of FIGS. 5(b) and 6(b), the part a3 is registered alone in the work part information column and the work part information column. In this case, Job3 for connecting part a3 to part B is preferably performed after Job1 for fitting part a1 to part a3. Therefore, the order constraint generator 40 sets Job1 as a preceding work of Job3.

Similarly, in the examples of FIGS. 5(c) and 6(c), the part c1 is registered alone in the work part information column and the work part information column. In this case, it is preferable that Job4 for attaching the component c1 to the component B is performed after Job5 for attaching the component c2 to the component c1 and Job6 for attaching the component c3 to the component c1. Therefore, the order constraint generator 40 sets Job5 and Job6 as preceding works of Job4.

(Setting condition 3)
Based on the setting condition 3, the order constraint generation unit 40 determines whether or not there is order constraint work for each piece of work information.

The order constraint generation unit 40 also pays attention to the case where the same part is registered multiple times in the to-be-worked part information column of the work list. In this case, it is preferable to determine the inner and outer installation positions in the completed state from the mounting direction of the parts to be worked, and to install the inner parts first.

Therefore, the order constraint generation unit 40 sets the minimum circumscribed rectangular parallelepiped of each of the working part and the to-be-worked part on the 3D model, and calculates the barycentric position of each rectangular parallelepiped. Next, the order constraint generation unit 40 calculates the normal vector α in the direction of the center of gravity of the work component and the normal vector β in the direction of the center of gravity of the work component from the contact surfaces of the work component and the work component in each work information. . If the direction of the normal vector α and the direction of the normal vector β match, it can be determined that the work information corresponds to installation of inner parts. Therefore, the order constraint generation unit 40 sets a work whose direction of the normal vector α matches the direction of the normal vector β as a preceding work of another work.

For example, as illustrated in FIG. 7A, part B is registered multiple times in the work part information column. Job 3, Job 4, and Job 7 to Job 11 are jobs in which part B is registered in the work target part information column.

The work parts of each Job for which part B is registered as a work-to-be-worked part are part a3, part c1, part d2, part d2, part E, part f1 and part f2. Therefore, the order constraint generator 40 sets the minimum circumscribed rectangular parallelepipeds of part a3, part c1, part d2, part d2, part E, part f1, part f2, and part B, and calculates the center of gravity thereof. FIG. 8A is a diagram illustrating the position of the center of gravity. In this case, the order constraint generation unit 40 calculates the normal vector α in the direction of the center of gravity of the part a3, which is the working part, and the normal vector α in the direction of the center of gravity of the part B, which is the work part, from the contact surface between the part a3 and the part B. Calculate the line vector β. As illustrated in FIG. 8A, the direction of the normal vector α and the direction of the normal vector β match. Therefore, the order constraint generation unit 40 sets Job3, which connects the part a3 to the part B, as a preceding work of the other work.

Next, the order constraint generation unit 40 calculates the normal vector α in the direction of the center of gravity of the part c1, which is the work part, and the normal line in the direction of the center of gravity of the part B, which is the work part, from the contact surface between the part c1 and the part B. Calculate the vector β. As illustrated in FIG. 8B, the direction of the normal vector α and the direction of the normal vector β do not match. Therefore, as exemplified in FIG. 7B, the order constraint generator 40 does not set Job4, which connects part c1 to part B, as preceding work of other work.

Similarly, the order constraint generator 40 calculates normal vectors α and β for parts d2, d2, E, f1, and f2, respectively, as illustrated in FIG. 8(c). . Of these, for the part E, the direction of the normal vector α and the direction of the normal vector β match. Therefore, the order constraint generator 40 sets Job 9 for attaching part E to part B as another preceding work, as exemplified in FIG. 7(c). In addition, the order constraint generation unit 40 performs Job 7 for screwing the part d1 to the part c1, Job 8 for screwing the part d2 to the part c1, Job 9 for attaching the part E to the part B, Job 10 for attaching the part f1 to the part B, And Job11, which attaches part f2 to part B, is not set as a preceding work of other work.

As described above, by acquiring the relationship between the center of gravity information of each part and each contact surface, it is possible to determine the inner and outer installation positions in the completed state, and to install the inner parts first. With the above settings, the order constraint generation unit 40 sets Job3 and Job9 as preceding works of Job4, Job7, Job8, Job10, and Job11.

Similarly, the order constraint generation unit 40 calculates the normal vector α and the normal vector β for the work parts of each Job in which the part c1 is registered as the work-to-be-worked part, and checks for direction matching. As illustrated in FIGS. 7(d) and 8(d), the direction of the normal vector α and the direction of the normal vector β do not match for part c2, part c3, part d1 and part d2. Therefore, the order constraint generator 40 does not set Job5 to Job8 as preceding works of other works.

(Generation of work order)
The work order generation unit 50 collects the preceding works set by setting conditions 1 to 3 into a work list. Next, the work order generator 50 generates a work order for each work so as not to violate the work order constraints generated by the order constraint generator 40 . First, the work order generation unit 50 sorts out the work order constraints, as illustrated in FIG. 9(a). Specifically, the work order generation unit 50 generates a work order group 1 in which Job 1 is performed after Job 2 and Job 3 is performed thereafter. The work order generation unit 50 also generates a work order group 2 in which Job 9 is performed after Job 3, and Job 10 and Job 11 are performed thereafter. The work order generation unit 50 also generates a work order group 3 in which Job5 and Job6 are performed in any order.

Next, as exemplified in FIG. 9B, the work order generation unit 50 generates an order in which work order group 2 is performed after work order group 1 is performed. Regarding the work order group 3, the order is not particularly restricted with respect to the work order group 1 and the work order group 2. The work order generation unit 50 generates the order in which Job 4 is performed after work order groups 1 to 3. FIG. The work order generation unit 50 generates an order to perform work order group 4 in which Job 7 and Job 8 are performed in any order after Job 4 . As a result, all work orders are generated so as not to violate the work order constraints.

FIG. 10 is a diagram illustrating a flowchart representing the flow of each process executed by the information processing apparatus 100. As shown in FIG. As illustrated in FIG. 10, the 3D model acquisition unit 10 acquires a 3D model from the input device 105 or the like (step S1). Next, the work list acquisition unit 20 acquires a work list from the input device 105 or the like (step S2). Next, the contact surface extraction unit 30 extracts the work part for each work information, the work part for each work information, and the contact surface between the work part and the work part (step S3).

Next, the order constraint generator 40 determines whether or not there is an order-constrained work for each piece of work information based on setting condition 1 (step S4). If it is determined as "Yes" in step S4, the order constraint generator 40 registers the preceding work in the preceding work column of the work list (step S5). In parallel with step S4, the order constraint generator 40 determines whether or not there is an order constrained work for each piece of work information based on setting condition 2 (step S6).

If it is determined as "Yes" in step S6, the order constraint generator 40 registers the preceding work in the preceding work column of the work list (step S7). In parallel with steps S4 and S6, the order constraint generator 40 determines whether or not there is an order constrained work for each piece of work information based on setting condition 3 (step S8). If it is determined as "Yes" in step S8, the order constraint generator 40 registers the preceding work in the preceding work column of the work list (step S9).

If step S4, step S6 or step S8 is determined to be "No", or after step S5, step S7 or step S9 is executed, the order constraint generator 40 performs the preceding work set in setting conditions 1 to 3. Collect into a work list (step S10). After that, if there is overlap between the work in the preceding work column of each work information and the preceding work of that work, the work order generating unit b50 deletes the duplicate work (step S11). Execution of the flowchart then ends.

According to this embodiment, the work list acquisition unit 20 acquires a work list as a plurality of pieces of work information for assembling a product including a plurality of parts. The 3D model acquisition unit 10 acquires a 3D model as information on the completed state of the product. The order constraint generation unit 40 generates work order constraint information based on the part information included in each of the plurality of pieces of work information in the work list and the 3D model. According to this configuration, it is possible to generate a work order constraint from the positional relationship of each part and the work information without moving the components. Therefore, work order constraints can be automatically generated efficiently.

As the setting condition 1, if a plurality of parts are included in one piece of work information, the order constraint generation unit 40 converts the work information including the plurality of parts as work part information into the one piece of work information. work order constraint information to be specified for the preceding work may be generated. In this case, work order constraints can be generated with high accuracy.

As the setting condition 2, the order constraint generation unit 40 converts the first work information in which a predetermined part is designated as work part information to the preceding work of the second work information in which the predetermined part is designated as work part information. Designated work order constraint information may be generated. In this case, work order constraints can be generated with high accuracy.

As the setting condition 3, the order constraint generation unit 40 may generate the work order constraint based on the center of gravity information of each part and the contact surface information between the parts included in the part information. In this case, the order of the work information of the parts installed inside can be prioritized over the order of the work information of the parts installed outside. Therefore, work order constraints can be generated with high accuracy.

In each of the above examples, the 3D model acquisition unit 10 and the work list acquisition unit 20 are an example of an acquisition unit that acquires a plurality of pieces of work information for assembling a product including a plurality of parts and information on the completed state of the product. Function. An order constraint generation unit 40 generates work order constraint information for the plurality of pieces of work information based on the part information and the completed state information included in each of the plurality of pieces of work information acquired by the acquisition unit. It functions as an example of a generator.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications and variations can be made within the scope of the gist of the present invention described in the scope of claims. Change is possible.

10 3D model acquisition unit 20 work list acquisition unit 30 contact surface extraction unit 40 order constraint generation unit 50 work order generation unit 100 information processing device

Claims (6)

A plurality of pieces of work information for assembling a product including a plurality of parts, including work part information that is information on a work part on which the work is performed, and to-be-worked part information that is a work destination of the work part an acquisition unit that acquires the work information including part information and information on the completed state of the product;
First work information in which a predetermined part is specified as work part information among the part information included in each of the plurality of work information, and second work information in which the predetermined part is specified as work-behind part information and a generating unit that generates work order constraint information that designates the first work information as a preceding work of the second work information . A plurality of pieces of work information for assembling a product including a plurality of parts, which are work part information that is part information of a work part on which work is performed, and part information of a work target part that is a work destination of the work part. an acquisition unit that acquires the work information including information on parts to be worked on and information on the completed state of the product;
When a plurality of parts are included in work information in one piece of work information, work order constraint information is generated that designates work information in which the plurality of parts are included as work piece information as a preceding work of the one piece of work information. an information processing apparatus comprising: a generation unit that 3. The method according to claim 1, wherein the generation unit generates the work order restriction information based on center-of-gravity information of each part and contact surface information between the parts included in the part information. The information processing device described. The generating unit generates the work order constraint information such that the order of the work information of the parts installed inside is prioritized over the order of the work information of the parts installed outside. Item 4. The information processing device according to any one of Items 1 to 3 . to the computer,
A plurality of pieces of work information for assembling a product including a plurality of parts, including work part information that is information on a work part on which the work is performed, and to-be-worked part information that is a work destination of the work part a process of acquiring the work information including the part information and the information of the completed state of the product;
First work information in which a predetermined part is specified as work part information among the part information included in each of the plurality of work information, and second work information in which the predetermined part is specified as work-behind part information and generating work order constraint information specifying the first work information as a preceding work of the second work information. to the computer,
A plurality of pieces of work information for assembling a product including a plurality of parts, including work part information that is information on a work part on which the work is performed, and to-be-worked part information that is a work destination of the work part a process of acquiring the work information including the part information and the information of the completed state of the product;
When a plurality of parts are included in work information in one piece of work information, work order constraint information is generated that designates work information in which the plurality of parts are included as work piece information as a preceding work of the one piece of work information. A work order constraint generation program characterized by executing a process of

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