SKILL EVALUATION SYSTEM, SKILL EVALUATION PROGRAM, SKILL EVALUATION METHOD, AND SKILL EVALUATION DEVICE

Abstract

To provide a system, a skill evaluation program, a skill evaluation method, and a skill evaluation device that allow an examinee to acquire a high-precision and appropriate tightening skill associated with flange tightening work.SOLUTION: A skill evaluation system 2 includes a tightening work unit 4, an information acquisition unit 6, and a processing unit 8. The tightening work unit 4 tightens a gas bolt and a nut to perform fastening work of a flange. Work information including axial force applied to the flange from the bolt and distances between facing flange surfaces at a plurality of points is acquired, evaluation items 14 including at least (1) a bolt axial force value, (2) a variation of axial force values, and (3) parallelism of a flange surface are set, and skill evaluation information and a comprehensive evaluation result screen are generated by comparing the work information 12 with reference information 18 for each evaluation item.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a technique for evaluating skills in flange tightening work involving the insertion of a gasket, and for providing evaluations and advice for acquiring such skills. [Background technology]

[0002] When connecting pipes, a gasket is placed between the flanges at the ends of each pipe to prevent gases and liquids flowing through the pipes from leaking from the connection. When connecting pipes like this, it is necessary to tighten multiple bolts and nuts to the opposing flanges. Flanges are fastened in a specified procedure with a specified tightening torque. Gaskets provide a seal when installed under specified conditions.

[0003] Regarding such flange tightening work, there is a system that receives output signals from strain gauges installed on multiple bolts, calculates the variation in the output signals during tightening work, the variation in the output signals when tightening work is completed, and the degree of tightening when tightening work is completed, and judges the skill level from these (for example, Patent Document 1). Also, regarding sealing work, there is a system that generates axial force distribution information from the axial force and position information of the bolts tightening the flange joint, and displays and monitors this axial force distribution information (for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-217497 A [Patent Document 2] JP 2017-161388 A Summary of the Invention [Problem to be solved by the invention]

[0005] By the way, the gasket sandwiched between the flanges must be fastened with an appropriate axial force at multiple fastening points by bolts and nuts, and the axial force of the fastening must be uniform between each fastening point. Attitude This provides a sealing function for the connections between pipes using flanges. Regarding tightening flanges using gaskets, for example Detailed construction standards are clearly stated in JIS (Japanese Industrial Standards) and other standards. It is a given that workers will be familiar with these construction standards. However, even if tightening work is performed after thoroughly understanding such construction standards, it is important to gain experience through construction training. In plant facilities, etc., many pipe connections using flanges are often installed, and in actual tightening work, it is not possible to check the tightening torque value applied to each bolt and nut, the axial force acting, or whether the flanges are parallel to each other using sensors. In tightening work, even if it is determined that the tightening has been performed according to the procedure according to the standard, there is a problem that there is a possibility that the flanges may be inclined to each other or the axial force may vary between bolts, which cannot be detected by visual inspection.

[0006] The inventors of the present invention have discovered that by providing a comprehensive evaluation of the multiple skills required for proper fastening, as well as indicating shortcomings in each individual skill, it is possible to deepen understanding of knowledge of work procedures and actual work results.

[0007] Patent Documents 1 and 2 do not disclose or suggest any solution to such problems, and the configurations disclosed in these documents cannot solve such problems. Based on this knowledge, the present invention aims to enable a person to understand the relationship between the evaluation of the skills required for fastening work and the overall evaluation results of the fastening state, and to acquire accurate and appropriate fastening skills. [Means for solving the problem]

[0008] In order to achieve the above object, according to one aspect of the skill evaluation system of the present invention, there is provided a skill evaluation system for evaluating a fastening skill for a flange having a gasket sandwiched therebetween, the gasket being sandwiched between the flanges, and a bolt and a nut being fastened. , multiple work processes were set a fastening work unit that performs a fastening work of the flange; As the above work process progresses, An information acquisition means for acquiring work information including at least an axial force applied to the flange from the bolt and a surface-to-surface distance between a plurality of opposing flange surfaces; and (1) The above Bolt Axial Force Value (2) The bolt Variation in axial force values (3) Parallelism of flange surfaces The evaluation items For each of the above steps and comparing the work information with the standard information for each evaluation item. Each of the above steps Generate skills evaluation information and generating a screen including the acquired work information at each predetermined timing from the start to the completion of the work process. At the same time, The above for the work process A processing unit is provided that generates a comprehensive evaluation result of fastening skills by using skill evaluation information and generates a skill evaluation screen including the skill evaluation information and the comprehensive evaluation result. The processing unit can display the generated plurality of screens continuously over time. do.

[0009] In the above skill evaluation system, the information acquisition means For each of the above work steps, The processing unit acquires the work information including work time information of the fastening work and fastening position information of the bolt, and further (4) Fastening work time (5) Fastening procedure One or both of the evaluation items may be set, the skill evaluation information may be generated based on a comparison result between the set evaluation items and the standard information corresponding to the evaluation items, and the overall evaluation result may be generated using the skill evaluation information. In the above-described skill evaluation system, the processing unit may set, for each bolt, category information that is set in accordance with a difference value of the detected axial force value relative to the reference information, and generate the skill evaluation information based on a distribution range of the category information. In the above-mentioned skill evaluation system, the processing unit may generate advice information for the skill evaluation information for each evaluation item, and display the advice information within the skill evaluation screen or on another screen associated with the skill evaluation screen. In the above skill evaluation system, the screen includes a polygonal chart graphic corresponding to the number and position of the bolts, a plurality of first display sections displaying the axial force value for each of the bolts, a plurality of second display sections displaying the face-to-face distance between opposing flange faces, and a first distribution graphic represented by the axial force value for each of the bolts and a second distribution graphic represented by the face-to-face distance in the chart graphic, and the processing unit displays transitions of the axial force value and the face-to-face distance over time by continuously displaying the plurality of generated screens. That's fine.

[0010] In order to achieve the above object, according to one aspect of the present invention, there is provided a skill evaluation program for implementation by a computer, comprising: Through multiple work processes By tightening the bolts and nuts to fasten the flange, As the above work process progresses, A function of acquiring work information including an axial force applied to the flange from the bolt and a surface-to-surface distance between a plurality of opposing flange surfaces from an information acquiring means; and at least (1) The above Bolt Axial Force Value (2) The bolt Variation in axial force values (3) Parallelism of flange surfaces The evaluation items For each of the above steps and comparing the work information with the standard information for each evaluation item. Each of the above steps A function for generating skill evaluation information; A function of generating the acquired work information every time a predetermined timing arrives from the start to the completion of the work process; A function for generating a comprehensive evaluation result of fastening skills using skill evaluation information, and a function for generating a skill evaluation screen including the skill evaluation information and the comprehensive evaluation result. and a function of displaying the generated plurality of screens continuously over time. The computer is caused to execute the above steps.

[0011] In the above skills evaluation program, For each of the above work steps, A function of acquiring the work information including work time information of the fastening work and fastening position information of the bolt from the information acquisition means; and (4) Working hours (5) Work Procedures The method may include a function of setting one or both of the evaluation items, a function of generating the skill evaluation information based on a comparison result between the set evaluation items and the standard information corresponding to the evaluation items, and a function of generating the overall evaluation result using the skill evaluation information. The skill evaluation program may include a function of setting, for each bolt, category information that is set in accordance with a difference value of the detected axial force value relative to the reference information, and generating the skill evaluation information based on a distribution range of the category information. The above skill evaluation program may include a function of generating advice information for the skill evaluation information for each evaluation item, and displaying the advice information within the skill evaluation screen or on another screen associated with the skill evaluation screen. In the skill evaluation program, the program includes a function for generating the screen including a polygonal chart graphic corresponding to the number and position of the bolts, a plurality of first display sections displaying the axial force value for each of the bolts, a plurality of second display sections displaying the face-to-face distance between opposing flange faces, a first distribution graphic represented by the axial force value for each of the bolts in the chart graphic and a second distribution graphic represented by the face-to-face distance, and a function for displaying transition of the axial force value and the face-to-face distance over time by continuously displaying the plurality of generated screens. That's fine.

[0012] In order to achieve the above object, according to one aspect of the skill evaluation method of the present invention, there is provided a skill evaluation method for evaluating a fastening skill of a flange having a gasket therebetween, the skill evaluation method comprising: Through multiple work processes By tightening the bolts and nuts to fasten the flange, As the above work process progresses, A step of acquiring work information including an axial force applied to the flange from the bolt and a surface-to-surface distance between a plurality of points on the opposing flange surfaces; (1) The above Bolt Axial Force Value (2) The bolt Variation in axial force values, (3) Parallelism of flange surfaces The evaluation items For each of the above steps and comparing the work information with the standard information for each evaluation item. Each of the above steps generating skill evaluation information; generating a screen including the acquired work information each time a predetermined timing arrives from the start to the completion of the work process by the processing unit; The processing unit, The above for the work process A step of generating a comprehensive evaluation result of fastening skills using skill evaluation information; and a step of the processing unit generating a skill evaluation screen including the skill evaluation information and the comprehensive evaluation result. and a step of displaying the plurality of generated screens successively over time by the processing unit. Includes. The above skill evaluation method may include a step of generating the screen including a polygonal chart graphic corresponding to the number and positions of the bolts, a plurality of first display units displaying the axial force value for each of the bolts, a plurality of second display units displaying the face-to-face distance between opposing flange faces, and a first distribution graphic represented by the axial force value for each of the bolts and a second distribution graphic represented by the face-to-face distance in the chart graphic, and a step of displaying transition of the axial force value and the face-to-face distance over time by the processing unit successively displaying the generated plurality of screens.

[0013] In order to achieve the above object, according to one aspect of the skill evaluation device of the present invention, As the multiple work steps set for the flange fastening work of fastening bolts and nuts progress, To flange The above An information acquisition unit that acquires work information including an axial force applied from a bolt and a surface-to-surface distance between a plurality of opposing flange surfaces; and at least (1) The above Bolt Axial Force Value (2) The bolt Variation in axial force values (3) Parallelism of flange surfaces The evaluation items For each of the above steps and comparing the work information with the standard information for each evaluation item. Each of the above steps Generate skills evaluation information and generating a screen including the acquired work information at each predetermined timing from the start to the completion of the work process. At the same time, The above for the work process A control unit is provided that generates a comprehensive evaluation result of fastening skills by using skill evaluation information and generates a skill evaluation screen including the skill evaluation information and the comprehensive evaluation result. The control unit can display the generated plurality of screens continuously over time. do. In the above skill evaluation device, the screen includes a polygonal chart graphic corresponding to the number and positions of the bolts, a plurality of first display sections displaying the axial force value for each of the bolts, a plurality of second display sections displaying the face-to-face distance between opposing flange faces, and a first distribution graphic represented by the axial force value for each of the bolts and a second distribution graphic represented by the face-to-face distance within the chart graphic, and the control unit may display transition of the axial force value and the face-to-face distance over time by continuously displaying the generated plurality of screens. Effect of the Invention

[0014] According to the present invention, any one of the following effects can be obtained.

[0015] (1) Individual skill evaluation of work information including axial force value, axial force variation, and flange parallelism and, By combining an overall evaluation using these work information to generate a skill evaluation screen, it is possible to allow the worker to recognize the impact of each piece of work information on the evaluation result when the flange tightening work is completed.

[0016] (2) By combining the overall fastening results with the information on each task to evaluate the skills, the worker can understand the elements for which points were deducted and the reasons for them, and this can be used for learning fastening tasks and correcting skills.

[0017] (3) Even if you have experience in fastening work, it may be difficult to confirm the work content and key points. or This will help improve tightening work skills and increase the reliability of construction. [Brief description of the drawings]

[0018] [Figure 1] 5 is a flowchart showing an example of a skill evaluation process using work information from flange tightening according to the first embodiment. [Diagram 2] FIG. 1 is a diagram illustrating an example of the configuration of a skill evaluation system. [Diagram 3] FIG. 11 is a diagram illustrating an example of the configuration of an information processing device according to a second embodiment. [Figure 4] FIG. 11 is a diagram illustrating an example of a reference information table. [Diagram 5] FIG. 13 is a diagram illustrating an example of evaluation criteria. [Figure 6] FIG. 13 is a diagram showing an example of an axial force skill evaluation table. [Figure 7] FIG. 13 is a diagram illustrating an example of a parallelism skill evaluation table. [Figure 8] FIG. 13 is a diagram showing the distribution of axial force variations. [Figure 9] FIG. 13 is a diagram showing an example of an axial force variation skill evaluation table. [Figure 10] FIG. 13 is a diagram illustrating an example of a comprehensive evaluation table. [Figure 11] FIG. 13 is a diagram showing an example of a skill evaluation screen. [Figure 12] FIG. 13 is a diagram showing the transition state of skill evaluation due to replay. [Figure 13] FIG. 13 is a diagram illustrating an example of the configuration of a skill evaluation system according to a third embodiment. [Figure 14] FIG. 11 is a diagram illustrating an example of a reference information table. [Figure 15] FIG. 11 is a diagram illustrating an example of a work procedure information table. [Figure 16] FIG. 13 is a diagram showing an example of a skill evaluation table for axial force and parallelism. [Figure 17] FIG. 13 is a diagram illustrating an example of a work time skill evaluation table. [Figure 18] FIG. 13 is a diagram showing an example of a setting screen. [Figure 19] FIG. 13 is a diagram showing an example of a skill evaluation screen. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] [First embodiment] Fig. 1 shows an example of a skill evaluation process for flange tightening according to the first embodiment. The process contents and procedure shown in Fig. 1 are merely examples, and the present invention is not limited to such contents. The skill evaluation process shown in Fig. 1 is an example of a skill evaluation method or a skill evaluation program of the present invention. In the skill evaluation process, for example, as shown in Figure 1, a flange fastening operation (S101) is performed in which a gasket is sandwiched between two opposing flanges and multiple bolts and nuts are tightened between the flange faces to fasten them, and the work information is monitored to generate evaluation information for each skill and an overall evaluation result of the fastening skills. In this tightening operation, preset work information related to skills is acquired from the fastening operation unit 4 (Fig. 2) (S102). In addition, when evaluation items for skill evaluation are set (S103), the processing unit 8 (Fig. 2), which executes evaluation processing for the tightening operation, compares the work information with reference information (S104) and generates skill evaluation information (S105). Furthermore, the processing unit 8 generates a comprehensive evaluation result screen (S106) and displays the comprehensive evaluation result and the skill evaluation result. evaluation A skill evaluation screen is generated by combining the information (S107).

[0020] Flange fastening work (S101): The fastening work unit 4 is equipped with a piping model in which, for example, a gasket is sandwiched between two flanges, and a nut can be fastened to a bolt that penetrates the flanges. An examinee (worker) undergoing a skill assessment selects a set type and number of bolts and nuts, places them on the piping model, and fastens the bolts and nuts using a set tool such as a wrench. In this fastening work, the fastening is performed according to a process that conforms to preselected standard information, and set values ​​such as axial force and fastening torque.

[0021] Acquisition of work information (S102): The processing unit 8 acquires work information including measurement values ​​such as axial force values ​​indicating the fastening state of the bolts and nuts and flange face distances from, for example, sensors installed in the fastening work unit 4. This work information may include, for example, the axial force values ​​acting on the bolts by the fastening work and information on the gaps between the flanges, as well as information regarding the positions and order of the bolts that were fastened. The processing unit 8 may select information to be used for at least the set skill evaluation items, and may also acquire all information that can be collected regardless of the skill evaluation items.

[0022] Setting of evaluation items (S103): The processing unit 8 sets evaluation items for skills related to fastening work. The processing unit 8 stores items stipulated for fastening of flange joints in standards such as JIS and ASME (The American Society of Mechanical Engineers), as well as other items set based on these standards. The evaluation items set include at least (1) bolt axial force value, (2) axial force value dispersion, and (3) flange surface parallelism. Furthermore, the evaluation items may include either or both of (4) fastening work time and (5) fastening work procedure.

[0023] Comparison of work information and reference information (S104): The processing unit 8 compares the work information with the reference information for the set evaluation items to perform an evaluation process to determine whether or not the tightening work has been performed in accordance with the reference information. The reference information is an example of a comparison standard associated with the evaluation item, and values ​​specified in standards such as JIS and ASME, or axial force values ​​set according to the type of gasket, etc. may be used. This reference information may be, for example, information stored in advance in a memory area of ​​the processing unit 8, or may be information stored in the processing unit 8. 8 The information may be obtained from an external database (DB) connected to the computer, or may be pre-stored in the computer that manages the sealing application.

[0024] Generation of skill evaluation information (S105): The processing unit 8 generates skill evaluation information based on the result of comparing the work information with the reference information. The skill evaluation information is an example of a judgment result of whether the examinee's fastening work is suitable for the evaluation standard specified in the reference information, and an evaluation result based on an increase or decrease in points according to the degree of deviation from the value specified in the reference information is adopted. In addition, the skill evaluation information may be, for example, a multiple-choice evaluation of whether the standard is met or not.

[0025] Generation of overall evaluation result (S106): The processing unit 8 uses the skill evaluation information generated for each evaluation item to generate an overall evaluation result. The overall evaluation result is an example of an evaluation result of the working state generated by combining the skill evaluation information for each evaluation item, and is generated by evaluating whether the results of all the set evaluation items meet the criteria. The overall evaluation result may be expressed, for example, as a total value of the skill evaluations, or as a rank expressed by numbers, letters, or other symbols.

[0026] Generate skill evaluation screen (S107): The processing unit 8 generates a skill evaluation screen that combines the generated overall evaluation result with the skill evaluation information for each evaluation item. The skill evaluation screen may be displayed on the display unit of the processing unit 8, or may be transmitted to a terminal device carried by the examinee.

[0027] Fig. 2 shows an example of the configuration of a skill evaluation system. The configuration shown in Fig. 2 is just an example, and the present invention is not limited to such a configuration. <Skill Evaluation System 2> The skill evaluation system 2 includes, for example, a fastening operation unit 4, an information acquisition unit 6, and a processing unit 8. The fastening section 4 is comprised of examinees 10 A worker who is In this piping model, the type of flanges and gaskets, their orientation, and the tightening direction and number of bolts and nuts can be set according to the scale of the equipment or device being evaluated.

[0028] The information acquiring unit 6 is an example of a means for acquiring work information 12 related to the tightening of the flanges from the fastening work unit 4. This information acquiring unit 6 is composed of measuring instruments such as an axial force sensor and a displacement meter for measuring the gap between the flanges, and a camera for recording the work status of the fastening work unit 4, which are installed in the fastening work unit 4, as well as a data logger that is connected to these measuring instruments wirelessly or by wire and collects measured information, images, and the like.

[0029] The processing unit 8 is configured by a computer, and is an example of a means for carrying out a skill evaluation process for the examinee 10 based on the collected task information 12 and generating an evaluation screen. The processing unit 8 is connected to the information acquisition unit 6 by wire or wirelessly, and acquires the collected task information 12 at a set timing or in real time. The processing unit 8 selects or assigns the task information 12 or performs information processing based on evaluation items 14 that are set automatically or by an administrator who manages the skill evaluation process. The processing unit 8 is provided with standard information 18 as a skill evaluation standard. The standard information 18 is stored, for example, in a memory unit of an information processing device 30 (FIG. 3) constituting the processing unit 8. 32 The information stored in the evaluation section 8 or information read from an external database includes information such as reference values, evaluation contents, and evaluation objectives for the items set in the evaluation items 14. The processing section 8 is provided with, for example, a skill evaluation information generation function section 20, a comprehensive evaluation result generation function section 22, and a skill evaluation screen generation function section 24. The skill evaluation information generating function unit 20 is an example of a function unit that generates skill evaluation information by comparing the task information 12 assigned in accordance with the evaluation items 14 with the reference information 18 . The overall evaluation result generation function unit 22 is an example of a function unit that generates an overall evaluation result by using the skill evaluation information generated for each evaluation item 14 . The skill evaluation screen generation function unit 24 generates a skill evaluation screen by combining the overall evaluation result and the skill evaluation information for each evaluation item. 24-1 4 is an example of a functional unit that generates

[0030] [Advantages of the First Embodiment] According to this configuration, the following effects can be obtained.

[0031] (1) Skill evaluation information generated using work information 12 and overall evaluation of fastening work result A skill evaluation screen is generated that combines the above and the examinee 10 By presenting this information, it is possible to determine whether or not the flange tightening work can be performed, as well as to identify any individual skills that are lacking, which will contribute to improving tightening work skills.

[0032] (2) Even if you have experience in tightening work, you can check the work content and key points, and you can improve your tightening skills, thereby increasing the reliability of construction.

[0033] Second Embodiment Fig. 3 shows an example of the configuration of an information processing device according to the second embodiment. The configuration shown in Fig. 3 is one example. In Fig. 3, the same parts as in Fig. 2 are denoted by the same reference numerals. The information processing device 30 performs skill evaluation processing and generates a comprehensive evaluation result based on the acquired work information 12 in the skill evaluation system 2. process This information processing device 30 is an example of a device that executes the generation process of a skill evaluation screen. The information processing device 30 is, for example, configured as a computer, and includes at least a processing unit 8 and a storage unit 32. The information processing device 30 includes, for example, an OS (Operating System) that is the basis of the operation process, a skill evaluation screen, Price The processing unit 8 is configured with a processor that executes the arithmetic processing of the program, a memory that is an operating area of ​​these programs, etc. The processing unit 8 is configured with a function unit 34 for setting evaluation items, a function unit 36 ​​for skill evaluation, a function unit 37 for generating a skill evaluation screen, etc., by the arithmetic processing of the skill evaluation program, 24 The storage unit 32 is configured with a storage medium such as a semiconductor memory or a hard disk drive (HDD), and stores the programs executed by the information processing device 30, as well as data generated in the skill evaluation process, the task information 12, and the like.

[0034] In addition, the information processing device 30 includes an information presenting unit 39 that presents information such as the generated skill evaluation screen, the settings of the skill evaluation process, and the progress status. The information presenting unit 39 may be configured, for example, as a monitor device connected to the information processing device 30 by wire and displaying images, or an audio output device that notifies audio information, or may be configured as another computer or Take a skills assessment Candidate or Manage your skills assessment It may be a terminal device used by the administrator.

[0035] The memory unit 32 stores, for example, an examinee table 40, reference information tables 42 and 44, a task information table 46, skill evaluation tables 48, 60 and 80 for each evaluation item, and an overall evaluation table 100 as a database for skill evaluation processing. 24-1 is stored. The examinee table 40 is undergoing a flange fastening skill evaluation. Candidate 10 This is an example of a database that stores information on the examinees. Candidate 10 The name, assigned ID (IDentification) information, date and time information, and information on the assessment items to be taken are stored.

[0036] <About the standard information table> The standard information tables 42, 44 are an example of comparison standards for the skill evaluation process, and store evaluation standard information for each item executed by the skill evaluation system 2, that is, for each one or more items that can be set as evaluation items. In the reference information table 42, for example, as shown in FIG. information In addition to the evaluation section 421, at least three evaluation items, namely, an axial force evaluation section 422, a gap evaluation section 423, and an axial force variation evaluation section 424, are included.

[0037] process information The section 421 stores process information stipulated in a standard for tightening a flange joint, or process information set using this standard. informationIn the section 421, for example, a "temporary tightening" process and a "final tightening" process are set as the bolt tightening work process, and further, the bolt and nut tightening may be divided into several steps. information The section 421 may further be set with a "preparation" process before the "pre-tightening" process, and an "additional tightening" process after the "final tightening" process.

[0038] The axial force evaluation unit 422 stores evaluation information for the axial force value acting on the bolt for each tightening process. The axial force evaluation unit 422 stores, for example, a target value of the axial force set for stage information such as the number of times the bolt has been tightened, as well as deduction information according to the range of difference between the detected value and the target value. This deduction information is an example of information used, for example, in the generation process of skill evaluation information or overall evaluation results.

[0039] The gap evaluation section 423 is an example of reference information that defines the gap between the flat portions of opposing flanges with a gasket interposed therebetween. The evaluation value of this gap is, for example, a value related to the parallelism of the flange surfaces. The gap evaluation unit 423 stores evaluation criteria information such as deduction information according to the value and range of the difference between the maximum and minimum values ​​of the distance between opposing flange surfaces at one or more points on the flange surfaces, for example, for each work process.

[0040] The axial force variation evaluation unit 424 stores the range of difference between the maximum and minimum detected axial force values ​​for the tightening of a plurality of bolts and nuts, and point deduction information as an evaluation criterion for that value.

[0041] In addition, the reference information table 42 includes at least the axial force evaluation, the clearance evaluation, and the axial force variation. evaluation In addition to the above three evaluation items, other evaluation items may be set.

[0042] The reference information table 44 is an example of an evaluation criterion for evaluating the variation in axial force, and an evaluation criterion is set for classifying the axial force value acquired as the work information into predetermined values, as shown in FIG. 5. The classification of the reference information table 44 is assigned according to the difference ratio from the reference axial force value, for example, by comparing the reference axial force value set for each work process with the axial force value that is the work information. The classification of the axial force value is set to classifications A, B, . . . , F for values ​​larger than the reference value, for example, with a difference ratio of 5%. If the value is smaller than the reference value, classifications G, H, I for values ​​smaller than the reference value are set with a difference ratio of 5%. In the reference information table 44, as an evaluation example, for example, 10 points is set as the highest evaluation when the axial force values ​​acquired from a plurality of bolts are distributed within the same or two adjacent classifications, and thereafter, the evaluation points are set with points deducted for the larger range of the classification in which the axial force value is arranged. In other words, in the evaluation of the variation in axial force, the narrower the distribution range of the axial force value or the smaller the deviation, the higher the evaluation point. In addition, in the axial force variation evaluation, a method of determining the range in which all of the acquired multiple axial force values ​​are located has been described, but the method is not limited to this. In such an axial force variation evaluation, the highest axial force value and the lowest axial force value may be used, and the distribution range may be determined using the difference or deviation between these two values.

[0043] <About the Skill Evaluation Table> The skill evaluation table is an example of a processing table for comparing work information with reference information. In this embodiment, the evaluation items include at least axial force value, axial force variation, and flange parallelism. Therefore, the skill evaluation table may include, for example, an axial force skill evaluation table 48 (FIG. 6), a parallelism skill evaluation table 60 (FIG. 7), an axial force variation skill evaluation table 80 (FIG. 9), and a comprehensive evaluation table 100 that compiles multiple evaluation items, as tables for evaluating each evaluation item. (Figure 10) This shows the case where

[0044] <Axial force skill evaluation> The axial force skill evaluation table 48 is, for example, as shown in FIG. 10Each of the axial force skill evaluation files 48-1, 48-2, ..., 48-N is generated for each of the above. Each of the axial force skill evaluation files 48-1, 48-2, ..., 48-N has an identification information section 50, a process section 52, a target value section 54, a measurement section 56, and an evaluation section 58 formed therein.

[0045] The identification information section 50 is an examination subject who is a worker who performs the fastening work. 10 In addition to the name and identification number of the person, information identifying the person or organization to be evaluated, such as the name of the company or a specific group, is input. Received Tester Table 40 (Figure 3) Alternatively, a link may be provided to the information field in the examinee table 40 to associate the information field with the information field in the examinee table 40.

[0046] The process section 52 stores information indicating a work process set as a tightening work procedure, for example, as information indicating the execution timing of the skill evaluation of the axial force. This work process may be set as a procedure stipulated in a standard such as JIS, for example, a "setup" process, a "pre-tightening" process, a "final tightening" process, an "additional tightening" process, etc., or as more detailed process information, a process such as "10% tightening of the axial force", "20% tightening of the axial force", etc. may be set. This process section 52 may be set with the work process adopted in the skill evaluation, or information adopted as the timing for evaluating the axial force from such a work procedure.

[0047] The target value section 54 stores the target value of the axial force set for the work process. The target value of the axial force is set to a value set according to standards or empirical rules for, for example, the size of the flange to be fastened, the type and material of the gasket, the number of bolts, etc. The target value is set to, for example, a target value F11 for the initial process A1 of temporary fastening for fastening a flange and gasket fastened with eight bolts. Furthermore, the target value is set to a value F12 larger than F11 for the second process A2 of the next temporary fastening.

[0048] The measuring unit 56 is an example of a processing unit in which the acquired work information is stored and which executes evaluation processing for a target value. The measuring unit 56 is formed with a data storage unit for each bolt to be evaluated. Furthermore, each data storage unit includes a work information unit 561 in which the axial force value, which is work information, is stored, and an evaluation unit 562 in which evaluation information for each evaluation object is stored. The evaluation unit 562 stores, for example, a comparison result between the information stored in the work information unit 561 and the information stored in the target value unit 54, evaluation information based on the comparison result, and the like. The data storage unit is associated with, for example, an axial force sensor installed on the bolt in advance, and work information detected by tightening a specific bolt is input to the associated data storage unit.

[0049] The result of the axial force skill evaluation for each work process is stored in the evaluation unit 58. For this axial force skill evaluation, for example, the total value of the deduction points stored in the evaluation unit 562 for a plurality of bolts 1 to 8, or a deduction point value derived based on this total value, is stored as an evaluation result. Note that evaluation section 58 is not limited to storing specific values, and may store evaluation ranks using symbols or letters, for example. In this axial force skill evaluation, the evaluation is performed based on the work information stored in the measurement unit 56, for example, through the following process. (a) A process to determine the difference in the average value of the target axial force (whether the average axial force is within a certain range of the target axial force). (b) Process to determine the difference between the maximum and minimum values ​​(variation in axial force). (c) Judgment process for the difference between the target axial force and the maximum value (whether the local axial force exceeds the fracture stress of the gasket). (d) A process to determine the difference between the target axial force and the minimum value (whether the local axial force falls below the sealing limit stress of the gasket).

[0050] <Parallelism skill evaluation> The parallelism skill evaluation table 60 may be, for example, as shown in FIG. 10Each of the parallelism skill evaluation files 60-1, 60-2, ... 60-N includes an identification information section 62, a process section 64, a measurement section 66, a minimum value section 68, a maximum value section 70, a difference section 72, and an evaluation section 74.

[0051] The identification information section 62 is an examination candidate who is a worker who performs the fastening work. 10 In this identification information section 62, the names registered in the examinee table 40 and the same information as that stored in the identification information section 50 of the axial force skill evaluation table 48 are stored.

[0052] The process section 64 stores information indicating the timing of execution of skill evaluation of parallelism based on distance measurement between flange surfaces, for example, information indicating a work process set as a tightening work procedure. The distance between the flange faces may be measured, for example, after each bolt tightening process, or may be set to be measured only when the final process is completed.

[0053] The measurement unit 66 stores the measurement values ​​between the two flange faces measured by a plurality of displacement meters or the like installed on the flange faces. Between the flange faces, the number of measurement positions for the face-to-face distance is set according to, for example, the flange diameter, and each measurement position can be identified to specify the position of the flange face-to-face distance. As a result, the measurement unit 66 stores the measurement values ​​from the set measuring instruments in the respective set fields.

[0054] The minimum value section 68 and the maximum value section 70 store the smallest or largest value among the measurement values ​​stored in the measurement section 66. In addition, the minimum value section 68 and the maximum value section 70 may store, for example, together with the measurement value, information capable of identifying the inter-surface position at which the measurement value became the minimum or maximum value.

[0055] The difference section 72 stores, for example, a difference value calculated from the measurement values ​​stored in the minimum value section 68 and the maximum value section 70 for each work process. The parallelism of the flanges represents the inclination state between the flanges due to the influence of the flange placement process, the bolt tightening work by hand which is the tightening preparation process, and the bolt tightening work using a tool. In determining the parallelism, for example, it is determined that the flanges are most inclined along the two points where the face-to-face distance is maximum and minimum.

[0056] Evaluation unit 74 stores evaluation points X1, X2, X3, ... based on a comparison between the values ​​stored in inter-face difference unit 72 and reference information. For this evaluation point, for example, a deduction method for the evaluation point assigned to the parallelism may be adopted, where if the maximum difference between faces is 0, the deduction is 0, and the larger the maximum difference, the larger the deduction.

[0057] <Evaluation of axial force variation> Fig. 8 shows an example of the distribution of axial force variations, and Fig. 9 shows an example of an axial force variation skill evaluation table. The configurations shown in Figs. 8 and 9 are only examples. Axial force scattering In the evaluation, for example, the distribution state of the axial force values ​​acting on the multiple bolts 1 to 8 that are the measurement targets is evaluated. The skill evaluation function unit 36 ​​of the processing unit 8 evaluates the distribution state of the axial force values ​​by using a reference information table 44, for example, as shown in FIG. 8. Variation distribution shows the distribution of axial force values ​​for examinees Z1, Z2, and Z3, for example. In the evaluation of axial force variation, an ideal example is given where the axial force is distributed within categories A and G, which are set within a range of ±5% of the reference value for axial force. In the ideal example, the axial force is distributed within two categories, and an evaluation score of 10 points is given as an example. Also, examinee Z2 has axial forces distributed across five ranges, from category B to category I, and is therefore given an evaluation score of, for example, fail. In addition, examinee Z3 has axial force values ​​distributed within two categories, E and F, which are far from the reference value, and is given an evaluation score of 10 points for the axial force variation.

[0058] The axial force variation skill evaluation table 80 includes an identification information section 82, a bolt distribution number section 84, a distribution division section 86, a distribution range section 88, a scoring section 90, and a judgment section 92, as shown in FIG. The identification information section 82 is an examination candidate who is a worker who performs the fastening work. 10 The name, etc. of the person is stored. In this identification information section 62, the names registered in the examinee table 40 and the same information as that stored in the identification information section 50 of the axial force skill evaluation table 48 are stored.

[0059] The bolt distribution number unit 84 stores the number of operation information assigned to the classification based on the comparison result between the acquired axial force value acting on each bolt and the reference value. Here, the case where only the number assigned to the bolt distribution number unit 84 is stored is shown, but this is not limited to this. For example, the bolt distribution number unit 84 may store information specifying which bolt is included in the classified number, or identification information of the sensor installed on the bolt.

[0060] The distribution division section 86 stores range information of divisions assigned according to the value of the axial force. The distribution range section 88 stores the number of categories of the assigned axial force. The scoring unit 90 is an example of evaluation information that is evaluated based on standard information set according to the number of distribution ranges, for example. The judging section 92 is a marking section 90 To Based on the stored evaluation points, the pass / fail judgment result of the axial force variation evaluation is stored.

[0061] <About the overall evaluation> Fig. 10 shows an example of the overall evaluation table. The configuration shown in Fig. 10 is just an example. The skill evaluation function unit 36 ​​generates a skill evaluation result for each set evaluation item, and also generates a comprehensive evaluation result by combining these skill evaluation results. The overall evaluation table 100 is an example of a processing area for generating an overall evaluation result based on the skill evaluation result for each evaluation item, and includes, for example, as shown in FIG. 10 , an identification information section 102, an axial force evaluation section 104, a parallelism evaluation section 106, an axial force variation evaluation section 108, an other results section 110, a total score section 112, and an evaluation result section 114.

[0062] The identification information section 102 stores the examinee's name and the name of the organization, and stores the same information as the names registered in the examinee table 40 and the information stored in the identification information section 50 of the axial force skill evaluation table 48.

[0063] The axial force evaluation section 104, the parallelism evaluation section 106, the axial force variation evaluation section 108 and the other results section 110 store, for example, the information stored in the evaluation section 58 of the axial force skill evaluation table 48, the evaluation section 74 of the parallelism skill evaluation table 60 and the scoring section 90 of the axial force variation skill evaluation table 80 as evaluation results for the set evaluation items, as well as evaluation results for other evaluation items.

[0064] The total score section 112 stores, for example, a score obtained by totaling the evaluation results stored for each evaluation item, or a score calculated based on a predetermined evaluation criterion using the evaluation results for each of these evaluation items.

[0065] The evaluation result section 114 stores evaluation information, which is an example of a comprehensive evaluation result and is set based on the score stored in the total score section 112. This evaluation information is expressed, for example, as a rank display showing a skill level using letters, numbers, symbols, etc., or an evaluation result such as "pass" or "fail."

[0066] <About the Skill Evaluation Screen> Fig. 11 shows an example of a skill evaluation screen. The evaluation items and screen configuration shown in Fig. 11 are only examples. Skill evaluation screen generation function 24generates a skill evaluation screen 120 using the evaluation results for each evaluation item stored in the overall evaluation table 100. The skill evaluation screen 120 is an example of an evaluation result screen for each examinee, and includes task information, skill evaluation, and overall evaluation result. The skill evaluation screen 120 shown in FIG. 11 is composed of a skill evaluation section 122 displayed using, for example, task information, a skill judgment section 123, a judgment result section 124, a comment section 125, and an operation display section 126.

[0067] The skill evaluation unit 122 is configured by combining, for example, a distribution diagram showing the tightening positions of eight bolts and the flange face-to-face measurement positions, and work information for each work process. The distribution diagram is provided with, for example, a regular octagonal diagram corresponding to the positions of the eight bolts, axial force display units 132a, 132b, . . . , 132h, and flange face-to-face value display units 134a, 134b, 134c, 134d between two predetermined bolts. These display units 132a, 132b, . . . , 132h and display units 134a, 134b, 134c, 134d are associated with, for example, the axial force skill evaluation table 48 and the parallelism skill evaluation table 60, and are capable of displaying the axial force and the flange face-to-face value. In addition, the distribution diagram shows, for example, a chart of the axial force distribution result 135, the axial force reference value 136, and the flange face-to-face distribution result 137. This chart display shows, for example, work information when all the processes of the tightening work are completed, or work information in the process at the end of the process set by the selection operation or at the time of the display operation of the skill evaluation screen 120. As the work process progresses, the values ​​of the chart display and axial force display sections 132a, 132b, ..., 132h and the flange surface-to-flange surface value display sections 134a, 134b, 134c, 134d of the flange surface-to-flange surface value between two predetermined bolts change in this distribution figure. In addition, the distribution figure may also show values ​​and chart displays in the previous process as comparative information of the axial force value or the flange surface-to-flange surface value, for example.

[0068] In the chart display of the axial force value, the figure of the distribution result 135 is distorted relative to the figure of the axial force reference value 136, which indicates that the axial force value does not match the reference value or that the axial force varies between bolts. Also, the value of the display section 134a, which is part of the distribution result 137 of the flange face-to-face value, is prominent, which indicates, for example, a state in which the tightening process of the bolts progresses and there is a difference in the tightening strength of some parts of the flange, resulting in a so-called uneven tightening state. The display units 132a, 132b, . . . , 132h, and the display units 134a, 134b, 134c, and 134d may display an alert by blinking or color coding for the measurement values ​​that are determined not to satisfy the standard information by the skill evaluation in each process. Also, the display units 132a, 132b, . . . , 132h, and the display units 134a, 134b, 134c, and 134d may display a new screen consisting of the axial force skill evaluation table 48, the parallelism skill evaluation table 60, and the measurement results of only the work process, by selecting the part where the alert is displayed. This allows the examinee, the work manager, and the like to check the state of the work that did not satisfy the standard value.

[0069] The skill judgment section 123 is an example of a display area for skill evaluation information for each evaluation item, and for example, tightening force (axial force) 1271, axial force variation 1272, flange surface parallelism 1273, tightening procedure 1274, time 1275, etc. are set as pre-set evaluation items. The evaluation items set here are only examples, and evaluation items that can be evaluated from work information, or evaluation items that utilize other work information not shown in the examples may be set. The skill assessment unit 123 is provided with a selection unit 128 for selecting evaluation items to be used in the overall assessment. The selection unit 128 can be operated by, for example, an examinee or an assessment test supervisor. In this embodiment, as an example, a case is shown in which the items of tightening force (axial force) 1271, axial force variation 1272, and flange surface parallelism 1273 are selected. Furthermore, the skill assessment unit 123 is provided with evaluation point display units 1291, 1292, 1293, 1294, and 1295 for each evaluation item. These evaluation point display units 1291, 1292, 1293, 1294, and 1295 display, for example, the evaluation results evaluated for all processes of the fastening work, or for processes that were completed when the skill evaluation screen 120 was generated. Furthermore, the evaluation point display units 1291, 1292, 1293, 1294, and 1295 may display, for example, items below the minimum standard score in color or blinking as a warning.

[0070] The judgment result section 124 is an example of a display area for the judgment results judged in the overall evaluation process, and may be linked to, for example, the evaluation information stored in the evaluation result section 114 of the overall evaluation table 100. The overall evaluation process utilizes the skill evaluation results of the evaluation items selected by the selection section 128. This judgment result section 124 may display, for example, "Best," "Better," and "Good" as examples of evaluation displays that have met the pass standard, "Retry," "Brush Up," and other displays as well as numerical values, symbols, and the like.

[0071] The comment section 125 is an example of a display section for making the examinee aware of information such as advice and evaluation points generated based on the judgment result, and may be automatically generated by the processing section 8 of the information processing device 30, or may be input by the skill evaluation supervisor, etc. The comment section 125 may display information automatically generated according to a format stored in the storage section 32 for an evaluation item that does not meet the pass criteria, for example. For example, if the axial force is insufficient, the comment section 125 displays the location of the insufficient tightening force and advice on how to acquire a sense of the appropriate tightening force. Furthermore, for example, if the difference between the flange faces is large, the comment section 125 displays the fact that tilt has occurred and its location, as well as advice on tightening preparation.

[0072] The operation display section 126 is an example of a display of operation items for the skill evaluation screen, and displays items such as sub-screens, reports, and menus. The sub-screen is a navigation operation section for moving to a display screen such as task information for each evaluation item, a chart display screen thereof, or a transition state diagram. The report function creates a report of the final tightening results, and performs processes such as outputting image files and printing, and creating a database of tightening history. The menu is an operation unit for moving to, for example, an initial screen for the skill evaluation process or a setting screen for evaluation items.

[0073] The skill evaluation screen 120 may further display information such as the maximum difference in the measured flange surface distances and an evaluation score related to the tightening axial force value.

[0074] <Example of the skills evaluation screen function> Fig. 12 shows an example of a display of the transition state of skill evaluation by replay. The configuration of the display screen, the display contents, and the display method shown in Fig. 12 are one example. The processing unit 8 displays work information for each work process by connecting to a skill evaluation table for each evaluation item in response to a selection operation on the display units 132a, 132b, . . . , 132h, display units 134a, 134b, 134c, 134d, etc. of the skill evaluation screen 120, and also has a replay function that displays work information and skill evaluation transition states as the work process progresses, as shown in FIG. of Generation function section 24 For example, a playback screen 140A (A in FIG. 12) showing a state during a work process and a work completion screen 140B (B in FIG. 12) showing a state in which the work process has been completed by final tightening are generated. , written by The work completion screen 140B may generate a plurality of screens including the acquired work information and the skill evaluation result at set time intervals until the fastening work is completed, or may generate images at the timing when the work information is acquired or the skill evaluation is generated, and display those images continuously over time. of Generation function section 24 Alternatively, the playback screen 140A from the start of the work to its completion may be displayed as a real-time video.

[0075] The playback screen 140A includes a timing display section 142 that indicates the evaluation timing of the displayed skill evaluation, and the viewer can select and operate the timing display section 142 to display the skill evaluation results of the previous and next work processes. The playback screen 140A includes at least the same display items as the skill evaluation screen 120, such as a polygonal chart graphic corresponding to the number of bolts to be tightened, an axis Force Value and display units 134a-1, 134b-1, ... on which the flange surface distance is displayed. In addition, the playback screen 140A is provided with an operation unit 144 for progressing the display contents, stopping the progress, repeating the progress, and the like. In the playback screen 140A, for example, by advancing time, the display results of the display units 132a-1, 132b-1, ... and the display units 134a-1, 134b-1, ... change as the work process progresses, and the number and size of the lines in the chart graphic increase according to this change. In the chart graphic, for example, the axial force value is displayed as the tightening is performed at the timing of the start of the work. At this time, the target axial force and the detected axial force value are displayed small. In addition, in the chart graphic, as the work process progresses and the number of tightening revolutions increases, the axial force value increases, and the distribution graphic expands accordingly. In addition, on playback screen 140A, the color of the frame of display units 132a-1, 132b-1, ... and display units 134a-1, 134b-1, ..., which transition as the playback time progresses, may be changed or made to blink when the target conditions of the work process during playback are not met.

[0076] In the work completion screen 140B, the axial force values ​​at the time when the final tightening is completed are displayed in the display sections 132a-2, 132b-2, . . . and the flange surface-to-surface values ​​are displayed in the display sections 134a-2, 134b-2, . ToAt this time, the chart shows that the detected axial force value matches the target axial force or reaches a range close to the target axial force. In other words, the distribution diagram of the axial force value matches or resembles the target axial force, and this allows the required or ideal sealing state to be obtained.

[0077] The processing unit 8 can also generate the transition of the flange inter-face value in addition to the axial force value, for example, for the transition state of the skill evaluation by replay.

[0078] <About Skill Evaluation Processing> The skill evaluation process executed by the information processing device 30 includes, for example, a process of tightening a bolt on a flange, a process of acquiring work information (S201), a process of setting evaluation items for the skill evaluation (S202), a process of reading out standard information corresponding to the set skill evaluation (S203), a process of comparing the work information with the standard information (S204), a process of generating skill evaluation information (S205), and a process of calculating a comprehensive evaluation result. Fruit Generation process (S206), overall evaluation results and skills evaluation The process includes generating a skill evaluation screen by combining the information (S207).

[0079] [Effects of the second embodiment] According to this configuration, the following effects can be obtained.

[0080] (1) The same effects as in the first embodiment can be obtained.

[0081] (2) By displaying the evaluation results for the entire fastening work in combination with the individual skill evaluations for each evaluation item and work process, examinees can understand the work status and its effects, and can acquire appropriate work techniques.

[0082] (3) It is possible to perform a detailed analysis and determine whether the work can be performed according to the standard information that is grasped as knowledge.

[0083] Third embodiment Fig. 13 shows an example of the configuration of a skill evaluation system according to the third embodiment. The configuration shown in Fig. 13 is just an example, and the present invention is not limited to such a configuration. <Skill Evaluation System 150> This skill evaluation system 150 includes, for example, a fastening work unit 152, Information acquisition unit 6 Surface distance measurement unit 154 and The system includes an axial force measuring unit 156, an information processing device 30, and an information presentation unit 39.

[0084] The fastening work section 152 is, for example, a connection section for two pipes arranged vertically. Nifu The fastening work unit 152 includes a flange 160. For example, piping equipment used in a plant or the like may be used as the fastening work unit 152, or a training device created to imitate such piping equipment may be used. Flanges 160-1 and 160-2 provided at the tip of each pipe have nuts 164 attached to a plurality of bolts 162 that penetrate the periphery at regular intervals. Eight bolts 162a, 162b, . . . 162h and nuts 164a, 164b, . . . 164h are installed on the flange 160. Gaskets are sandwiched between the flanges 160-1 and 160-2 at their joints, and the bolts 162a, 162b, . . . 162h and nuts 164a, 164b, . . . 164h are tightened using a tool 166. As a result, the gasket is pressed between the flanges 160-1 and 160-2, thereby exerting a sealing function for the joints between the pipes. The tool 166 includes, for example, a manual wrench, a torque wrench, a nut runner, a tool having a function for measuring the tightening axial force, and the like.

[0085] In addition, a tool other than a manual wrench may be capable of transmitting and receiving information on measurement values ​​and setting values ​​between the axial force measuring unit 156 of the information acquiring unit 6 and the information processing device 30, for example. In addition, as shown in FIG. 13, the fastening working section 152 may be configured so that the flange faces face each other horizontally and the nuts 164 are turned horizontally or nearly so to fasten the bolts 162 that pass through vertically, or alternatively, the fastening working section 152 may be configured so that the flange faces face each other vertically and the nuts 164 are turned vertically or nearly so to fasten the bolts 162 that pass through vertically.

[0086] Some or all of the bolts 162 installed on the flange 160 are provided with sensors 168a, 168b, ..., 168h for detecting axial forces. The detected axial forces of the sensors 168a, 168b, ..., 168h are input into the information processing device 30 via the axial force measuring unit 156 and used as work information.

[0087] <Measuring the distance between flange faces> In the Skill Evaluation System 150, Bolt 162 and Nut 164 In addition to detecting the axial force acting due to the fastening of the flanges, the face-to-face distance between the flanges is measured as construction information for the flange fastening process. For example, as shown in FIG. 13, the face-to-face distance D is measured by a face-to-face distance measuring unit 154 measuring the gap generated between the opposing faces of the flanges 160-1 and 160-2. By measuring The surface-to-surface distance measuring unit 154 is an example of the information acquiring unit 6, and measures the surface-to-surface distance using data measured by the displacement sensors 170a, 170b, ... installed on the flange 160. The displacement sensors 170a, 170b, ... use, for example, contact-type displacement meters, and the tip of the measuring unit penetrates the flange 160-2 and comes into contact with the flat surface of the opposing flange 160-1. 160 For example, the measurement of the face-to-face distance of a flange 160 The measuring section expands and contracts in response to the increase and decrease in the gap between the flanges, thereby measuring the displacement. Alternatively, the displacement meter may measure distance by, for example, irradiating the measurement surface with laser light and receiving the reflected light. The displacement sensors 170a, 170b, ... are arranged at equal intervals or at intervals close to equal on the circumferential surface of the flange 160, and are arranged, for example, at the bolt 162 and Nut164 At least one or more bolts and nuts are interposed between the displacement sensors 170a, 170b, etc., and, for example, the flanges used may be arranged on the circumference of the circumference. 160 The number of the parallelization holes to be installed is set according to the outer diameter of the parallelization hole and the resolution of the parallelization hole to be set.

[0088] <About information processing devices> The information processing device 30 includes, for example, a processing unit 8, a storage unit 32, and a timing unit. This timing means is an example of a means for acquiring time information such as elapsed time, and acquires time information by using a timer or a timing program executed by the processing unit 8.

[0089] In this embodiment, the skill evaluation process is performed based on evaluation items including work time and work process in addition to the at least three evaluation items of axial force, flange parallelism, and axial force variation shown in the second embodiment.

[0090] <About the standard information table> FIG. 14 shows an example of the reference information table 180. This reference information table 180 specifies the reference information for the evaluation items added in the third embodiment. Therefore, the reference information table 180 may be used in combination with the above-described reference information tables 42 and 44 according to the set evaluation items. 14, this reference information table 180 includes a time evaluation section 182, a procedure 1 evaluation section 184, and a procedure 2 evaluation section 186. Each evaluation section stores reference information in association with work process information.

[0091] The time evaluation unit 182 stores the elapsed time until the set work process is completed and the reference information for the evaluation. For the set work process, for example, the work time for each of the "pre-tightening" process and the "final tightening" process, or a combination of these, is set.

[0092] The procedure 1 evaluation unit 184 stores, for example, information such as the number of bolts installed on the flange, the tightening sequence, and the tightening means, and the evaluation criteria thereof. In the procedure 1 evaluation unit 184, for example, as shown in FIG. 15, work procedure information tables 190A and 190B are stored, or the reference information is linked so as to be readable from the work procedure information tables 190A and 190B stored in other storage areas. The work procedure information table 190A stores work procedure information set based on information specified in the JIS standard, for example, as shown in A of FIG. 15. The work procedure information table 190B stores work procedure information set based on information specified in the ASME standard, for example, as shown in B of FIG. 15.

[0093] The work procedure information tables 190A, 190B include, for example, process sections 192A, 192B, bolt number sections 194A, 194B, tightening procedure sections 196A, 196B, and target sections 198A, 198B. The process portions 192A and 192B are flanges. 160 Mounting bolts 162 The process for evaluating the work procedure is stored. The bolt number sections 194A and 194B are bolts set according to the inner diameter of the gasket or flange, etc. 162 Of the bolts, the number of bolts that are subject to skill evaluation processing 162 Information such as the number and location of lines is stored.

[0094] The tightening procedure sections 196A and 196B store information such as tightening means and tightening sequence. The objective sections 198A and 198B are an example of explanatory information relating to the fastening procedure, for example, and store information that the worker should understand in the skill evaluation.

[0095] <Work procedure skill evaluation> In the work procedure skill evaluation process, for example, the order of bolt tightening operations is evaluated. For example, positions P1, P2, ..., P8 are set on the flange 160 as identification information for specifying the positions and tightening positions of each bolt 162 and nut 164. In the tightening process of the flange 160 (160-1, 160-2), so-called diagonal tightening is used in the preliminary tightening and final tightening processes. If the tightening start is P1, the tightening order of this diagonal tightening is P1 → P5 → P3 → P7 → P2 → P6 → P4 → P8, with P8 being the tightening end point. In the work procedure skill evaluation process, in addition to monitoring the order of changes in the axial force values ​​measured by the sensors 168a, 168b, ... 168h, changes in the position information of the tool 166 are monitored.

[0096] The procedure 2 evaluation unit 186 stores reference information on the maximum value of the axial force (peak axial force) acting on the bolt immediately after tightening. The axial force value acting on the bolt is maximum immediately after it is tightened by the tool. In the flange tightening process, multiple tools are tightened in one process according to a set sequence. When one bolt is tightened, the tightening force acts on the other bolts, so-called elastic interaction occurs. In other words, when bolt a is tightened, the flange displaces downward on the bolt a side, and then displaces toward bolt d by tightening the other bolt d. At this time, the axial force on the bolt a side of the flange decreases due to the displacement toward the bolt d side. When all the bolts are tightened according to a specified procedure, the flange is tightened with a specified axial force and in a parallel or nearly parallel state. In the evaluation of step 2, an evaluation process is performed on the axial force immediately after tightening. In step 2, the work information obtained from the displacement meter installed on the flange may be used to evaluate the flange face distance at the time along with the peak axial force during tightening.

[0097] In addition to these three evaluation items, other evaluation items may be set in this reference information table 180.

[0098] <Work procedure skill evaluation> FIG. 16 shows an example of a skill evaluation table for axial force and parallelism. For this axial force and parallelism skill evaluation table 200, skill evaluation files 200-1, 200-2, ... 200-N are generated for each examinee. The axial force peak value for each bolt work process and the flange parallelism at that time are stored in the axial force and parallelism skill evaluation table 200. The axial force peak value and the flange parallelism for each work process are an example of a work procedure skill evaluation. The axial force and parallelism skill evaluation table 200 includes, for example, an identification information section 202, a process section 204, an axial force section 206, a face-to-face measurement section 208, a total score section 210, and a judgment result section 212, as shown in FIG. 16 .

[0099] In the identification information section 202, information for identifying the person or organization to be evaluated, such as the name and identification number of the examinee who will be performing the fastening work, as well as the name of a company or a specific group, is input.

[0100] The process section 204 stores information indicating a work process set as a tightening work procedure, for example, as information indicating the execution timing of the skill evaluation of the axial force at the completion of tightening. This process section 204 may be set with information that is adopted as the work procedure adopted in the skill evaluation and the timing of the evaluation of the axial force and parallelism in the work procedure.

[0101] The axial force unit 206 is a processing area that evaluates the axial force for each work process, and includes a target value unit 2061 , a measurement result unit 2062 , and an evaluation unit 2063 .

[0102] A target value of the axial force set for each work process is stored in the target value section 2061. This target value of the axial force is set to a value different from the target value of the axial force evaluation at the time of completion of the work process in the second embodiment, for example.

[0103] The axial force value obtained for the bolt immediately after it has been tightened and before the bolt in the next work sequence is tightened is stored in the measurement result unit 2062. Note that the axial force measurement unit 156, for example, always collects detection data from the sensors 168a, 168b, etc., monitors the change in the axial force value detected from the bolt in the tightening procedure, extracts the maximum value, and may transmit it to the information processing device 30.

[0104] The evaluation unit 2063 compares the maximum value of the axial force stored in the measurement result unit 2062 with the target value stored in the target value unit 2061, and stores an evaluation result based on the comparison result. The axial force is evaluated, for example, by determining whether there are any bolts whose difference between the axial force value stored in the measurement result unit 2062 and the target value is equal to or greater than a predetermined range, and further by setting a deduction number according to the number of bolts whose difference is equal to or greater than the predetermined range.

[0105] In addition, the axial force section 206 may display, for example, a color or blinking display for the display section of a bolt that is determined to be a point-deductible item based on a comparison between the axial force value and the target value. This allows the examinee to recognize which bolt tightening work does not meet the regulations.

[0106] The face-to-face measurement unit 208 is a processing area that evaluates the flange face-to-face value when fastening is completed, and includes a measurement result unit 2081 and a difference unit 2082. The measurement values ​​between the flange faces obtained from the displacement sensors 170a, 170b, ... when the tightening of each bolt is completed are stored in the measurement result section 2081. The flange face-to-face value changes as the tightening of the multiple bolts progresses.

[0107] The difference section 2082 stores, for example, for each work process, the difference between the maximum and minimum measurement values ​​stored in the measurement result section 2081 .

[0108] The total score section 210 stores the evaluation results calculated by the axial force and parallelism skill evaluation process for each work process.

[0109] The judgment result section 212 uses the evaluation results stored in the total score section 210 to store the pass / fail judgment results based on the evaluation of the axial force variation and the flange parallelism.

[0110] <Evaluation of work time> FIG. 17 shows an example of a working time skill evaluation table. The task time skill evaluation table 220 is an example of a processing area for evaluating the task time required for a set task process. The task time skill evaluation table 220 includes, for example, an identification information section 221, a reference information section 222, a limit reference information section 223, a measurement value section 224, and an evaluation section 225.

[0111] The identification information section 221 stores information for identifying an examinee for the skill evaluation.

[0112] The reference information section 222 is an example of reference information on working time. This reference information may be set uniformly based on, for example, an average value of past working time, or may be changed for each examinee depending on conditions such as the examinee's experience level or a skill evaluation rank (not shown). The limit reference information section 223 is another example of reference information on the work time, and stores the maximum time for the tightening work. In this reference information, the limit time may be set according to conditions such as the number of bolts to be installed in the flange.

[0113] The measured value section 224 stores information about the time that has elapsed from the start to the end of a specified work process. The evaluation section 225 performs skill evaluation by combining the working time stored in the measurement value section 224, the information stored in the reference information section 222, and the limit reference information section 223.

[0114] <Overall rating> Fig. 18 shows an example of a setting screen. The display items, values, and layout shown in Fig. 18 are just an example. The setting screen 230 is an example of a display screen that displays the point allocation conditions, standard information, work processes, etc. when performing the skill evaluation process and the overall evaluation process, and can be set. As shown in Fig. 18, for example, this setting screen 230 includes an axial force setting section 232, a parallelism setting section 234, a work time setting section 236, and a work process setting section 238 as setting conditions for each evaluation item.

[0115] The axial force setting unit 232 is an example of an evaluation condition for the axial force skill evaluation, and stores, for example, the point allocation conditions used in the axial force skill evaluation, the target axial force value, the limit value conditions for the axial force, as well as point deduction conditions for the comparison result between the reference information and the measured value.

[0116] The parallelism setting unit 234 stores an example of evaluation conditions for the parallelism skill evaluation, such as point allocation conditions between the measured flange faces, conditions for maximum and minimum values ​​between the faces, and subtraction value conditions according to the magnitude of the maximum difference between the faces.

[0117] The task time setting section 236 is an example of an evaluation condition for task time skill evaluation, and stores a point allocation condition, a reference value condition, a limit time condition, a point deduction condition for exceeding a time, and the like.

[0118] The work process setting section 238 stores conditions such as the completion rate for each work process, for example, "pre-tightening" and "final tightening."

[0119] <About the Skill Evaluation Screen> Fig. 19 shows an example of a skill evaluation screen. The evaluation items and screen configuration shown in Fig. 19 are examples. In Fig. 19, the same parts as in Fig. 11 are given the same reference numerals. The judgment result screen 240 is an example of a skill evaluation screen for each examinee, and is composed of, in addition to the skill evaluation screen 120, an identification information section 242, a test result section 244, an axial force transition section 248, an axial force result section 250 at the time of tightening completion, an inter-face transition section 252, and an inter-face value section 254, as shown in FIG. 19, for example.

[0120] This skill evaluation screen 120 displays the skill evaluation results for five evaluation items when the fastening procedure and time selection section 128 is selected, and displays, for example, axial force values, flange face-to-face values, and a polygonal distribution diagram showing measurement positions and number of measurements, as well as including a work time display section 246.

[0121] The name and identification number of the examinee who will perform the fastening work, as well as information for identifying the person or organization to be evaluated, such as the name of a company or a specific group, are input into the identification information section 242. The information displayed in the identification information section 242 is used to identify the examinee and to associate with the skill evaluation table for each evaluation item that has been set.

[0122] The test result section 244 is an example of a comprehensive evaluation result of the skill evaluation process, and displays evaluation information such as a total score together with information such as the test date and time and the type of gasket.

[0123] The axial force transition section 248 is an example of the result information of the axial force skill evaluation and the work procedure skill evaluation, and displays the transition state of the axial force detection value for each bolt in a graph. This axial force transition section 248 shows that, for example, the axial force value increases significantly immediately after the bolt is tightened, and then, as time passes and another bolt is tightened, the axial force value decreases at a predetermined rate due to stabilization of the tightening state and elastic interaction, and then becomes a stable value.

[0124] The axial force result section 250 at the time of completion of tightening displays the maximum axial force value at the time of completion of tightening. The axial force result section 250 at the time of completion of tightening is linked to the axial force and parallelism skill evaluation table 200, and displays the axial force value stored in the axial force section 206 according to the selected work process. This axial force result section 250 at the time of completion of tightening is associated with, for example, the axial force transition section 248, and by selecting the maximum value or minimum value, etc., the corresponding part of the axial force transition section 248 can be displayed in a distinguishable manner by changing the color or blinking.

[0125] The surface-to-surface transition section 252 is an example of the result information of the parallelism skill evaluation and the work procedure skill evaluation, and displays the transition state of the flange surface-to-surface value detected by each displacement sensor in a graph. For example, the surface-to-surface transition section 252 shows a state in which the surface-to-surface value decreases significantly immediately after tightening, and then the flange surface-to-surface value stabilizes over time and as other bolts are tightened.

[0126] The surface-to-surface value at tightening time section 254 displays the surface-to-surface value at the time of tightening completion. The surface-to-surface value at tightening time section 254 is linked to the skill evaluation table 200 for axial force and parallelism, and displays the surface-to-surface value at the time of tightening completion such as the measurement result section 2081. Surface-to-surface measurement section 208 The flange face-to-face value stored in is displayed.

[0127] [Advantages of the third embodiment] According to this configuration, the following effects can be obtained.

[0128] (1) The same effects as those of the first and second embodiments can be obtained.

[0129] (2) By displaying the distribution of evaluation results across the set evaluation items, test takers can understand their missing skills, experience, etc.

[0130] (3) By displaying comments on evaluation items, work processes, etc., where sufficient evaluation results were not obtained, the effect of acquiring skills for fastening work can be improved.

[0131] [Modifications] Modifications of the embodiment described above are listed below.

[0132] In the above embodiment, the process of determining the tightening order is performed based on the order detected by the axial force sensor with respect to the skill evaluation of the work procedure, but the skill evaluation process of the present invention is not limited to such a method. In the work procedure skill evaluation, for example, the motion information of the examinee may be acquired as the work procedure and the evaluation may be performed. This motion information may be collected, for example, from the motion of the examinee himself, or from a camera installed in goggles worn by the examinee. The camera installed in the goggles may be, for example, so-called smart glasses with a built-in computer having a function of photographing the line of sight and the direction of the face of the examinee during the tightening work. In this way, the skill evaluation system 150 may transmit and receive image information by communication between the goggles and the information processing device 30. Furthermore, the skill evaluation system 150 may collect tightening timing information of each bolt 162 and nut 164 in the work process, and associate the construction information acquired by the sensor 168 with the motion information to grasp it as a work procedure. Additionally, the skill evaluation system 150 may obtain work information by taking images including the examinee's movements and contact positions, for example, using a camera placed in the work area where fastening work is performed.

[0133] As described above, the most preferred embodiment of the present invention has been described. The present invention is not limited to the above description. Various modifications and changes are possible for those skilled in the art based on the gist of the invention described in the claims or disclosed in the description for carrying out the invention. It goes without saying that such modifications and changes are included in the scope of the present invention. [Industrial Applicability]

[0134] According to the present invention, for each evaluation item set as the subject of skill evaluation, a skills evaluation screen is generated which includes each skill evaluation and a comprehensive evaluation result which is combined with these to show the examinee, thereby enabling him / her to deepen awareness of lacking skills and improve the effectiveness of skill acquisition, which is useful. [Explanation of symbols]

[0135] 2. 150 Skill Evaluation System 4, 152 Fastening work section 6 Information acquisition section 8 Processing section 10 Candidates 12 Work Information 14 Evaluation items 18. Standard Information 20 Skill evaluation information generation function unit 22 Comprehensive evaluation result generation function 24 Skill evaluation screen generation function section 24-1 Skill evaluation screen 30 Information processing device 32 Storage section 34 Evaluation item setting function section 36 Skill evaluation function Department 3 9 Information presentation section 40 Candidate Table 42, 44, 180 Standard information table 421 Process information department 422, 104 Axial Force Evaluation Section 423 Gap Evaluation Unit 424 Axial Force Variation Evaluation Section 46 Work Information Table 48 Axial Force Skill Evaluation Table 48-1, 48-2, 48-N Axial force skill evaluation file 50, 62, 82, 102, 202, 221 Identification information section 52, 64, 192A, 192B, 204 Process Department 54, 2061 Target value section 56, 66 Measurement section 561 Work Information Department 562, 58, 74, 2063, 225 Evaluation Department 60 Parallelism Skill Evaluation Table 60-1, 60-2, 60-N Parallelism Skill Evaluation File 68 Minimum 70 Maximum value 72, 2082 difference part 80 Axial Force Variation Skill Evaluation Table 84 Volt Distribution Number Part 86 Distribution section 88 Distribution range section 90 Scoring Department 92 Judgment section 100 Overall Rating Table 106 Parallelism evaluation section 108 Axial Force Variation Evaluation Section 110 Other Results Section 112, 210 Total score section 114 Evaluation Results Section 120 Skill Evaluation Screen 122 Skills Assessment Department 124 Judgment result section 125 Comments section 126 Operation display section 1271 Clamping force (axial force) 1272 Variation in axial force 1273 Flange surface parallelism 1274 Tightening Procedure 1275 hours 128 Selection 1291, 1292, 1293, 1294, 1295 Evaluation point display section 132, 132a, 132b, ..., 132h, 132a-1, 132b-1, ..., 132h-1, 132a-2, 132b-2, ...132h-2, 134 , 134a, 134b, 134c, 134d, 134a-1, 134b-1, 134c-1, 134d-1, 134a-2, 134b-2, 134c-2, 134d-2 Display section 135 Axial force distribution results 136 Axial force reference value 137 Distribution results between flange faces 140A Playback screen 140B Work completion screen 142 Timing display unit 144 Operation section 154 Surface Distance Measurement Unit 156 Axial force measurement section 160, 160-1, 160-2 flanges 162, 162a, 162b, ... 162h Bolts 164, 164a, 164b, ..., 164h Nut 166 Tools 168, 168a, 168b, ..., 168h Sensor 170a, 170b, ... displacement sensor 182 Time Evaluation Section 184 Step 1 Evaluation Section 186 Step 2 Evaluation Section 190A, 190B Work procedure information table 194A, 194B Number of bolts 196A, 196B Tightening Procedure 198A, 198B Objective part 200 Axial Force and Parallelism Skill Evaluation Table 206 Axial force section 2062, 2081 Measurement Results Section 208 Face-to-face measurement section 212 Judgment result section 220 Work Time Skill Evaluation Table 222 Standard Information Department 223 Limit Standards Information Department 224 Measurement section 230 Setting screen 232 Axial force setting section 234 Parallelism setting section 236 Work time setting section 238 Work process setting department 240 Judgment result screen 242 Identification information section 244 Test Results Section 246 Working time display unit 248 Axial force transition part 250 Axial force result at the end of tightening 252 Interplane transition part 254 Fastening time surface value part

Claims

1. A skill evaluation system for evaluating a fastening skill of a flange having a gasket therebetween, comprising: a fastening work unit that fastens a flange having a gasket sandwiched between the flanges and fastens bolts and nuts to perform a flange fastening work having a plurality of work steps; an information acquiring means for acquiring work information including at least an axial force applied to the flange by the bolt and a surface-to-surface distance between the opposing flange surfaces at a plurality of locations as the work process progresses; at least, (1) Axial force value of the bolt (2) Variation in the axial force of the bolt (3) Parallelism of flange surfaces a processing unit which sets evaluation items for each of the work processes, compares the work information with standard information for each of the evaluation items to generate skill evaluation information for each of the work processes, generates a screen including the acquired work information each time a predetermined timing occurs from the start to the completion of the work process, and generates a comprehensive evaluation result of fastening skills using the skill evaluation information for the work process, and generates a skill evaluation screen including the skill evaluation information and the comprehensive evaluation result; wherein the processing unit is capable of continuously displaying the generated plurality of screens over time.

2. The information acquisition means acquires the work information including work time information of the fastening work and fastening position information of the bolt for each of the work processes, The processing unit further comprises: (4) Fastening work time (5) Fastening procedure the skill evaluation system according to claim 1, characterized in that one or both of the evaluation items above are set, the skill evaluation information is generated based on a comparison result between the set evaluation items and the standard information corresponding to the evaluation items, and the overall evaluation result is generated using the skill evaluation information.

3. 3. The skill evaluation system according to claim 1, wherein the processing unit sets, for each bolt, category information that is set in accordance with a difference value of the detected axial force value relative to the reference information, and generates the skill evaluation information based on a distribution range of the category information.

4. The skill evaluation system described in any one of claims 1 to 3, characterized in that the processing unit generates advice information for the skill evaluation information for each evaluation item, and displays the advice information within the skill evaluation screen or on another screen associated with the skill evaluation screen.

5. The screen includes a polygonal chart diagram corresponding to the number and position of the bolts, a plurality of first display sections displaying the axial force value for each of the bolts, a plurality of second display sections displaying the face-to-face distance between opposing flange faces, and a first distribution diagram represented by the axial force value for each of the bolts and a second distribution diagram represented by the face-to-face distance within the chart diagram, 5. The skill evaluation system according to claim 1, wherein the processing unit displays a transition of the axial force value and the surface-to-surface distance over time by continuously displaying the generated plurality of screens.

6. A skills assessment program for computer implementation, comprising: a function of acquiring, from an information acquiring means, operation information including an axial force applied to the flange by the bolt through a plurality of operation steps by tightening the bolts and nuts to fasten the flange, and a surface distance between the opposing flange surfaces at a plurality of points as the operation steps progress; at least, (1) Axial force value of the bolt (2) Variation in the axial force of the bolt (3) Parallelism of flange surfaces a function of setting an evaluation item for each of the work processes and generating skill evaluation information for each of the work processes by comparing the work information with standard information for each of the evaluation items; a function of generating a screen including the acquired work information each time a predetermined timing arrives from the start to the completion of the work process; a function of generating a comprehensive evaluation result of fastening skills by using the skill evaluation information for the work process; a function of generating a skill evaluation screen including the skill evaluation information and the overall evaluation result; A function of continuously displaying the generated plurality of screens over time; A skill evaluation program characterized by causing the computer to execute the above steps.

7. A function of acquiring the work information including work time information of the fastening work and fastening position information of the bolt from the information acquisition means for each of the work steps; moreover, (4) Working hours (5) Work Procedures The ability to set either or both of the evaluation items, a function of generating the skill evaluation information based on a comparison result between the set evaluation items and the reference information corresponding to the evaluation items; a function of generating the comprehensive evaluation result using the skill evaluation information; 7. The skill evaluation program according to claim 6, further comprising:

8. 8. The skill evaluation program according to claim 6, further comprising a function of setting, for each of the bolts, category information that is set in accordance with a difference value of the detected axial force value relative to the reference information, and generating the skill evaluation information based on a distribution range of the category information.

9. A skill evaluation program as described in any one of claims 6 to 8, characterized in that it includes a function of generating advice information for the skill evaluation information for each evaluation item, and displaying the advice information within the skill evaluation screen or on another screen associated with the skill evaluation screen.

10. A function for generating the screen including a polygonal chart diagram corresponding to the number and position of the bolts, a plurality of first display sections displaying the axial force value for each of the bolts, a plurality of second display sections displaying the face-to-face distance between opposing flange faces, and a first distribution diagram represented by the axial force value for each of the bolts in the chart diagram and a second distribution diagram represented by the face-to-face distance; a function of displaying a transition of the axial force value and the inter-face distance over time by continuously displaying the plurality of generated screens; 10. The skill evaluation program according to claim 6, further comprising:

11. A skill evaluation method for evaluating a fastening skill of a flange having a gasket therebetween, comprising the steps of: a step of acquiring work information including an axial force applied to the flange from the bolt and a surface distance between a plurality of points on opposing flange surfaces as the work steps progress, by fastening the bolts and nuts through a plurality of work steps to fasten the flange; The processing unit of the information processing device includes at least (1) Axial force value of the bolt (2) Variation in the axial force of the bolt (3) Parallelism of flange surfaces a step of setting an evaluation item for each of the work processes and generating skill evaluation information for each of the work processes by comparing the work information with reference information for each of the evaluation items; generating a screen including the acquired work information each time a predetermined timing arrives from the start to the completion of the work process by the processing unit; a step of the processing unit generating a comprehensive evaluation result of fastening skills by using the skill evaluation information for the work process; a step of the processing unit generating a skill evaluation screen including the skill evaluation information and the overall evaluation result; a step of the processing unit successively displaying the generated plurality of screens over time; A skill evaluation method comprising:

12. A process in which the processing unit generates the screen including a polygonal chart figure corresponding to the number and position of the bolts, a plurality of first display units displaying the axial force value for each of the bolts, a plurality of second display units displaying the face-to-face distance between opposing flange faces, and a first distribution figure represented by the axial force value for each of the bolts and a second distribution figure represented by the face-to-face distance in the chart figure; a step of displaying a transition of the axial force value and the inter-face distance over time by continuously displaying the plurality of generated screens by the processing unit; The skill evaluation method according to claim 11, comprising:

13. An information acquisition unit that acquires work information including an axial force applied to the flange by the bolt and a surface distance between two or more opposing flange surfaces as a plurality of work steps set for a flange fastening work in which bolts and nuts are fastened progresses; at least, (1) Axial force value of the bolt (2) Variation in the axial force of the bolt (3) Parallelism of flange surfaces a control unit which sets evaluation items for each of the work processes, compares the work information with standard information for each of the evaluation items to generate skill evaluation information for each of the work processes, generates a screen including the acquired work information each time a predetermined timing occurs from the start to the completion of the work process, and generates a comprehensive evaluation result of fastening skills using the skill evaluation information for the work process, and generates a skill evaluation screen including the skill evaluation information and the comprehensive evaluation result; wherein the control unit is capable of continuously displaying the generated plurality of screens over time.

14. The screen includes a polygonal chart diagram corresponding to the number and positions of the bolts, a plurality of first display sections displaying the axial force value for each of the bolts, a plurality of second display sections displaying the face-to-face distance between opposing flange faces, and a first distribution diagram represented by the axial force value for each of the bolts and a second distribution diagram represented by the face-to-face distance within the chart diagram, The skill evaluation device according to claim 13, wherein the control unit displays the generated plurality of screens in succession to display transitions of the axial force value and the inter-face distance over time.

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