WO2015177965A1 - フランジ締結スキル判定装置及びフランジ締結スキル判定プログラム - Google Patents
フランジ締結スキル判定装置及びフランジ締結スキル判定プログラム Download PDFInfo
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- WO2015177965A1 WO2015177965A1 PCT/JP2015/002105 JP2015002105W WO2015177965A1 WO 2015177965 A1 WO2015177965 A1 WO 2015177965A1 JP 2015002105 W JP2015002105 W JP 2015002105W WO 2015177965 A1 WO2015177965 A1 WO 2015177965A1
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- bolts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
- G01L5/0071—Specific indicating arrangements, e.g. of overload
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0033—Force sensors associated with force applying means applying a pulling force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B19/00—Teaching not covered by other main groups of this subclass
- G09B19/24—Use of tools
Definitions
- the present invention relates to a flange fastening skill judgment device and a flange fastening skill judgment program.
- the pipes are connected to each other by tightening a plurality of bolts in a state where the flanges of a pair of pipes are abutted via a gasket.
- the fastening operation of the flange with the bolt is performed manually by the operator.
- Patent Documents 1 and 2 disclose a configuration in which an electrode or a pressure sensor is arranged on a gasket arranged between a pair of flanges, and the tightening state of each bolt fastening the flange is monitored. Yes.
- Patent Documents 1 and 2 described above merely disclose a configuration for monitoring the tightening state of the bolt after fastening and a configuration for measuring the tightening force of the bolt after fastening the flange. It is not assumed that a skill related to tightening a bolt in advance is determined.
- the present invention has been made in view of the above-described problems, and a flange fastening skill determination device capable of objectively and clearly performing skill determination related to a worker's flange fastening in a flange fastening operation. And it aims at providing a flange fastening skill judgment program.
- a flange fastening skill determination device is provided with each tightening force detector provided individually corresponding to a plurality of bolts fastened to connect the flanges.
- a receiving unit that receives an output signal that is output along with the tightening operation of the plurality of bolts of the subject, and the tightening operation is completed from the start of the tightening operation of each of the plurality of bolts that is received by the receiving unit.
- a measuring unit that obtains a plurality of measurement results indicating changes in the change of each of the output signals until time, and a plurality of the measurement results to calculate each of the tightening forces during the tightening operation of the plurality of bolts
- a first calculation result indicating variation in the output signal value of the detector; a second calculation result indicating variation in the output signal value of each of the tightening force detectors when the tightening operation of the plurality of bolts is completed; and Tighten multiple bolts
- a calculation unit that obtains a third calculation result indicating the degree of each tightening force when the work is completed, and each of the skill determination items.
- the determination part which determines whether the test subject's skill which concerns on an additional work is in the skill level of three or more, and the output part which outputs the determination result by the said determination part are provided.
- the flange fastening skill determination program includes a plurality of bolts that are tightened to connect the flanges, and each of the plurality of the test force of the subject from each of the tightening force detectors provided correspondingly.
- the output signal output in response to the bolt tightening operation is received, and the change of each output signal from the start of the tightening operation to the completion of the tightening operation is received for each of the received bolts.
- a plurality of measurement results to be obtained, a plurality of the measurement results are calculated, and a first calculation result indicating variation in the output signal value of each of the tightening force detectors during the tightening operation of the plurality of bolts;
- a second calculation result indicating variation in output signal value of each of the tightening force detectors when the tightening operations of the plurality of bolts are completed, and each tightening force when the tightening operations of the plurality of bolts are completed.
- a computer is caused to execute a determination step of determining which of the skill levels is one or more and an output step of outputting the determination result obtained in the determination step.
- the output signal of the tightening force detector from the start of tightening of each bolt tightened to connect the flange to the completion of the tightening operation A measurement result indicating the transition of the change is obtained, and a plurality of the measurement results are calculated to obtain a predetermined calculation result. Therefore, the calculation result shows the change of the tightening force over time during the tightening operation of each bolt.
- the first calculation result indicating the variation in the output signal value of each of the tightening force detectors during the tightening operation of the plurality of bolts is used as a skill determination item, so that the tightening operation becomes defective. It can be evaluated whether or not problems such as so-called flange rotation (problems due to local contact pressure concentration of the gasket) can occur.
- the flange fastening skill determination device or the flange fastening skill determination program in each aspect of the present invention the flange fastening capable of objectively and clearly performing the skill determination related to the worker's flange fastening.
- a skill determination device and a flange fastening skill determination program can be provided.
- FIG. 10 is a diagram illustrating display contents of a display unit according to Embodiment 2.
- FIG. It is a figure which shows the display content of the display part which concerns on Embodiment 3.
- the determination device 1 includes a dummy flange 2, a plurality of bolts 3 with a clamping force detector (hereinafter referred to as “bolts 3”) attached to the dummy flange 2, and a reception line connected to the bolt 3.
- Unit 4 a personal computer 5 (hereinafter referred to as “PC 5”) connected to receiving unit 4, and display unit 6 and input means 7 connected to PC 5.
- PC 5 personal computer 5
- the dummy flange 2 has a shape and structure simulating the end of an actual pipe.
- the dummy flange 2 has a pair of annular flanges.
- Each flange has a constant surface width, and a plurality of (for example, eight places) insertion holes are formed at equal intervals in the circumferential direction.
- the flanges are arranged to face each other with a gasket (not shown) interposed therebetween.
- the bolt 3 has a clamping force detector (not shown) embedded in the shaft.
- this clamping force detector is configured using a known temperature-corrected three-wire strain gauge.
- the electrical resistance value is output as an output signal from the strain gauge in the energized state.
- the strain gauge is distorted as the bolt 3 is tightened, the electrical resistance of the strain gauge changes and the output signal of the strain gauge changes.
- a plurality of bolts 3 are used. Each bolt 3 is inserted into each insertion hole of each flange in the dummy flange 2.
- the test subject screws a nut into each bolt 3 and tightens each set of bolt 3 and nut with a spanner S. Accordingly, the pair of annular flanges of the dummy flange 2 are fastened with the gasket interposed therebetween.
- tightening a set of bolts 3 and nuts is simply referred to as “tightening the bolts 3”.
- the strain gauge embedded in the bolt 3 detects the axial strain of the bolt 3.
- the bolt 3 In the fastening operation of the flange, the bolt 3 is distorted in the axial direction due to the repulsive force of the gasket sandwiched between the pair of annular flanges in the dummy flange 2. That is, the output signal of the strain gauge (strain detected by the strain gauge) corresponds to the tightening force (surface pressure of the flange fastening surface) of the bolt 3 and the nut.
- the receiving unit 4 is connected to a wiring extending from the strain gauge of each bolt 3 and receives an output signal output from each strain gauge as the bolt 3 is tightened.
- the receiving unit 4 is configured by a known data collection interface (DAQ) as an example, and AD-converts the received output signal from the strain gauge of each bolt 3 and transmits it to the PC 5 side.
- DAQ data collection interface
- the PC 5 is connected to the receiving unit 4 and acquires the received signal from the strain gauge of each bolt 3 after AD conversion from the receiving unit 4.
- the PC 5 is an example of a general-purpose computer.
- the processing unit 50 connected to the receiving unit 4, the display unit 6, and the input unit 7 and the processing unit 50 are accessible.
- the processing unit 50 includes a CPU in the PC 5.
- the processing unit 50 functionally includes a measurement unit 50a, a calculation unit 50b, and a determination unit 50c.
- the storage unit 51 is configured using, for example, a hard disk or a nonvolatile memory.
- the storage unit 51 stores a predetermined flange fastening skill determination program (hereinafter referred to as “determination program”) and a plurality of determination criteria used in the determination program.
- the measurement unit 50a, the calculation unit 50b, and the determination unit 50c of the processing unit 50 function based on a determination program when the determination device 1 is driven. Furthermore, in the storage unit 51, the ID information of a plurality of subjects, the measurement results received by the receiving unit 4 during the determination test for each subject, and the processing unit 50 of the determination device 1 calculates based on the determination program.
- the first, second and third calculation results and the determination level result determined by the processing unit 50 based on each of these calculation results are stored in association with each other.
- the PC 5 is provided with input means 7 for an operator to input input information so as to be connected to the processing unit 50.
- the input means 7 is composed of a keyboard as an example.
- the display unit 6 is an example of an output unit of the determination apparatus 1 and outputs (displays) measurement data, calculation results, and determination results of the processing unit 50.
- the display unit 6 is composed of a liquid crystal monitor as an example.
- the determination apparatus 1 is activated, and the processing unit 50 is caused to read the determination program stored in the storage unit 51. Further, an examiner or an input person (hereinafter referred to as “operator”) of the determination apparatus 1 inputs the ID information of the subject to the determination apparatus 1 via the input means 7.
- the ID information includes information such as the name of the subject and the date of the determination test.
- the operator inputs the subject's ID information, and then operates the input means 7 to input the completion of the input to the determination device 1. Thereby, the processing unit 50 of the determination apparatus 1 determines that the ID information is completed (S1).
- the measurement unit 50a executes a measurement step based on the determination program, and continuously measures the transition of the change in the output signal of each strain gauge corresponding to each bolt 3 through the reception unit 4.
- the processing unit 50 stores the measurement data in the storage unit 51 (S2).
- the operator instructs the subject to start tightening operation of each bolt 3 of the dummy flange 2 using the spanner S after the input completion is input.
- the subject does not tighten one bolt to the target tightening force F target by one tightening operation in the flange tightening operation, but the unit tightening operation of one bolt is performed m times. Divided stepwise (however, m> 1). And, for example, the order of n bolts is the same as in the bolt tightening order by the so-called round method described in the American Society of Mechanical Engineers (ASME) or the Japan Standard for High Pressure Technology (HPIS). By repeating the round operation of performing the unit tightening operation m times, n bolts are tightened to the target tightening force F target .
- ASME American Society of Mechanical Engineers
- HPIS Japan Standard for High Pressure Technology
- the bolts 3 are tightened by repeating a plurality and the same number of unit tightening operations, so that the tightening force of each bolt 3 changes stepwise with each unit tightening operation. Therefore, the signal value of the output signal of each strain gauge of each bolt also changes in stages with each unit tightening operation of each bolt 3.
- the measurement unit 50a can measure time from the measurement start time in S2, and the measurement unit 50a can automatically terminate the measurement when a certain time (for example, 600 seconds) has elapsed (S3). ).
- the calculation unit 50b calculates the above measurement results stored in the storage unit 51 based on the determination program, and performs calculation steps for obtaining the following three calculation results (S4).
- the calculation unit 50b includes a first calculation result indicating variations in the output signal value of each strain gauge during the tightening operation of each bolt 3, and each strain gauge when the tightening operation of each bolt 3 is completed.
- the second calculation result indicating the variation in the output signal value and the third calculation result indicating the degree of each tightening force when the tightening operation of each bolt 3 is completed are obtained as skill determination items.
- the first calculation result is expressed as “ ⁇ ”, the second calculation result as “ ⁇ ”, and the third calculation result as “ ⁇ ”.
- ⁇ can evaluate whether or not each bolt 3 capable of suppressing the occurrence of flange rotation is tightened. It can be evaluated whether ⁇ is tightened on the average for all bolts 3 or not. ⁇ can evaluate whether or not each bolt 3 is tightened to the minimum tightening surface pressure required by the gasket disposed between the pair of annular flanges of the dummy flange 2.
- the determination unit 50c executes a determination step as a determination unit based on the determination program (S5). Specifically, the determination unit 50c uses ⁇ , ⁇ , and ⁇ obtained in the calculation step as skill determination items, compares each skill determination item with a determination criterion prepared in advance, and based on the comparison result, tightens the bolt. It is determined whether the skill level of the subject related to the supplementary work is one of the skill levels prepared in three or more.
- Each determination criterion can be, for example, a plurality of stepwise numerical ranges as described in detail later.
- the processing unit 50 executes an output step, and causes the display unit 6 to output a determination result by the determination unit 50c (S6).
- the determination apparatus 1 ends the determination test.
- the operator, the subject, and the like can know the determination result from the display content of the display unit 6.
- the determination unit 50c based on the determination program, as an example, numerical values of three or more levels prepared in advance in accordance with the grades of grades in the order of ⁇ , ⁇ , and ⁇ . Determine which of the ranges it belongs to. If any of the preceding skill determination items is determined to be NG as a result of the comparison among ⁇ , ⁇ , and ⁇ , the flow is performed without determining the subsequent skill determination items. finish.
- the signal value of the output signal when each bolt 3 is tightened with the target tightening force F target is 100%, and ⁇ [%] and ⁇ [%] , ⁇ [%] are obtained as the following calculation results.
- each bolt 3 at the time of completion of any unit tightening operation during the tightening operation of each bolt 3 The difference between the maximum and minimum values of the output signal values of each strain gauge.
- the one having the maximum difference between the maximum value and the minimum value in the output signal value at the completion of all the unit tightening operations during the tightening operation of each bolt 3 is used.
- the value of the target tightening force F target of the bolt 3 can be appropriately set.
- the tightening of the bolt 3 corresponding to the recommended tightening surface pressure of the gasket sandwiched between the pair of annular flanges of the dummy flange 2 is possible. It can be set to the value of the applied force.
- ⁇ [%], ⁇ [%], and ⁇ [%] can also be obtained as calculation results other than the above.
- 60% of F target was set to the same as the recommended tightening surface pressure of the gasket.
- the determination apparatus 1 four determination criteria are used as the determination criteria for each skill determination item. Specifically, in order to determine the level of ⁇ [%], for example, “A1” (within 13%), “A2” (within 13% within 16%), “A3” (within 16% within 20%) , “A4” (over 20%) is used as each criterion. In order to determine the level of ⁇ [%], as an example, “B1” (within 10%), “B2” (over 10% and within 15%), “B3” (over 15% and within 20%), “B4” ”(Greater than 20%) is used as each criterion.
- ⁇ As an example, “C1” (51% to 70%), “C2” (46% to 75%), “C3” (36% to 65%) , “C4” (less than 36% or more than 75%) is used as each criterion.
- the numerical ranges of “C1” to “C3” of ⁇ are partially overlapped with each other as an example, and by determining ⁇ together with ⁇ and ⁇ , the level of the subject can be determined. ing.
- ⁇ decreases in the order of A1, A2, A3, and A4.
- the level of ⁇ decreases in the order of B1, B2, B3, and B4.
- the level of ⁇ decreases in the order of C1, C2, C3, and C4.
- the determination step as an example, only when ⁇ [%] is determined as “A1”, ⁇ [%] is determined as “B1”, and ⁇ [%] is determined as “C1”, It is determined that the skill level of the subject is the skill level corresponding to the highest rank “III determination”. In the determination step, for example, ⁇ [%] is determined to be “A2 or higher”, ⁇ [%] is determined to be “B2 or higher”, and ⁇ [%] is determined to be “C2 or higher”. If the skill level does not correspond to “III determination”, it is determined that the skill level corresponds to “II determination”.
- ⁇ [%] is determined as “A3 or higher”
- ⁇ [%] is determined as “B3 or higher”
- ⁇ [%] is determined as “C3 or higher”.
- the determination step for example, when ⁇ [%] is determined as “A4”, when ⁇ [%] is determined as “B4”, and when ⁇ [%] is determined as “C4”. In either case, it is determined that the skill level corresponds to “NG”.
- the determination unit 50c first determines whether ⁇ [%] is “A1” among the skill determination items (S50). If it is determined that it is “A1”, ⁇ [%] is “B1”. Is determined (S51), and when it is determined that it is "B1", it is determined whether ⁇ [%] is "C1" (S52) and is determined that it is "C1” Is determined that the skill level of the subject is the skill level corresponding to “III determination” of the highest rank (S53), and the flow ends.
- the determination unit 50c determines whether or not ⁇ [%] is “B2” or more (S55). If it is determined that “B2 or more”, ⁇ [%] is “C2 or more”. (S56), and if it is determined that it is “C2 or higher”, the skill level of the subject is the skill level corresponding to “II determination” that is inferior to “III determination”. A determination is made (S57), and the flow ends. As described above, in the example of the flow shown in FIG. 4, if ⁇ [%] is “A2”, “III determination” is not obtained regardless of the determination results of ⁇ [%] and ⁇ [%]. It is said.
- the determination unit 50c determines that ⁇ [%] is “A3” (S61) or determines that ⁇ [%] is not “B2 or more” (S55)
- the determination unit 50c determines ⁇ [%] is determined to be “B3 or higher” (S58). If it is determined to be “B3 or higher”, whether or not ⁇ [%] is “C3 or higher” is determined. If it is determined (S59) and it is determined that it is “C3 or higher”, it is determined that the skill level of the subject is a skill level corresponding to “I determination” that is inferior to “II determination” (S60), The flow ends.
- the determination unit 50c determines that ⁇ [%] is not “A3” in S61, it determines that ⁇ [%] is “A4” (S62). If the determination unit 50c determines that ⁇ [%] is not “B3” in S58, it determines that ⁇ [%] is “B4” (S63). Alternatively, if the determination unit 50c determines that ⁇ [%] is not “C3 or higher” in S59, it determines that ⁇ [%] is “C4” (S64). After executing any of the determinations of S62 to S64, the determination unit 50c determines that the skill of the subject is the skill level corresponding to “NG determination” (S65), and ends the flow.
- the determination unit 50 c has three or more skills of the subject involved in the tightening operation of each bolt 3 based on the result of collating the skill determination items ⁇ , ⁇ , and ⁇ with the respective determination criteria. It is determined which of the skill levels (“III determination”, “II determination”, “I determination”, “NG determination”) corresponds to.
- III determination is a skill level at which, for example, bolts can be tightened in piping of all the lines of a factory using a spiral gasket alone.
- II determination is a skill level at which, for example, a bolt tightening operation on a flange using a spiral gasket cannot be performed alone, but a bolt tightening operation on a flange using a joint sheet gasket can be performed independently.
- I Judgment can, for example, perform bolt tightening work on the flange only in collaboration with a skill level holder of “II Judgment” or higher, but even if paired with a skill level holder of “III Judgment” The skill level is such that bolts cannot be tightened in the flange using the spiral gasket.
- NG determination is a skill level at which, for example, the bolt tightening operation cannot be performed and the flange surface, the bolt and the nut can be cleaned.
- the skill level of each worker can be easily confirmed by pasting a sticker displaying each skill level in advance on the position of the helmet that is easily visible.
- the determination device 1 can evaluate the flange fastening operation itself, which is difficult to evaluate in the past, rather than simply monitoring or measuring the tightening state of the bolt after fastening. .
- the determination device 1 can evaluate the degree of variation in the tightening force of each bolt 3 at one point in time during the tightening operation by performing a determination step using ⁇ as a skill determination item. Thereby, it can be determined whether or not the occurrence of flange rotation or the like that may occur by rapidly tightening a certain bolt is caused.
- the determination apparatus 1 by performing a determination step using ⁇ as a skill determination item, there is a certain degree of variation in the tightening force of each bolt 3 when the tightening operation is completed (when the flange tightening operation is completed). It is possible to determine whether or not the occurrence of one-side tightening or the like that may occur in some cases occurs.
- the determination apparatus 1 it is possible to determine whether or not a problem such as pipe leakage that may occur due to insufficient bolt tightening force is caused by performing a determination step using ⁇ as a skill determination item.
- the determination apparatus 1 and the determination program it is possible to objectively and clearly evaluate the flange fastening work skill possessed by the subject regardless of the experience and intuition related to the subject's bolt fastening work. Therefore, it is possible to appropriately select the optimal human resources for the flange fastening operation.
- the processing unit 50 causes the display unit 6 to display the determination screen 10 in the output step.
- the determination screen 10 includes a first display unit 11, a second display unit 12, a third display unit 13, a fourth display unit 14, and a fifth display unit 15.
- the first display section 11 shows the test date, the name of the examinee, the examiner, and the determination result.
- the second display unit 12 displays graphically the measurement results of the tightening force of each of the eight bolts 3 (bolts 3a to 3h) at each time during the tightening operation.
- the ratio [%] of the tightening force of each bolt to the target tightening force Ftarget when the target tightening force Ftarget is 100% is set for each predetermined numerical range (as an example). Every 5%) with different background colors.
- the third display portion 13 also displays the degree of variation in the tightening force [%] (ratio to the target tightening force F target ) of each bolt 3 (bolts 3a to 3h).
- the value of the degree of variation in the third display unit 13 is displayed as a value of ⁇ [%] after the tightening operation of all the bolts 3 is completed.
- the fourth display unit 14 shows the elapsed time of the judgment test.
- the fifth display section 15 confirms which numerical range the background colors displayed on the third display section 13 correspond to in the ratio [%] of the tightening force of each bolt 3 to the target tightening force F target . A color swatch for doing this is shown.
- the processing unit 50 displays the determination screen 10 on the display unit 6 in the output step, and causes the first display unit 11 in the determination screen 10 to display the determination screen 10 in any of steps S53, S57, S60, and S65 in the flow of FIG.
- the determination result determined by the processing unit 50 is displayed. From the display content of the first display unit 11, the result of the test of the subject can be known.
- the graph determination screen 20 is displayed over the determination screen 10.
- the sixth display portion 21 displayed in the center of the graph determination screen 20 displays the elapsed time [sec] of the bolt tightening operation in the determination test on the horizontal axis, and the gasket surface pressure (Gasket Load) [MPa]. Is displayed on the left vertical axis, and when the target tightening force F target of each bolt 3 is 100%, the ratio [%] of each bolt to F target is the right vertical axis. Display the graph. On the right vertical axis of the sixth display portion 21, the measurement value [MPa] of the tightening force can be selected by operating the selection button 22.
- the data of the respective bolts 3 are continuously displayed in a curved shape with the elapsed time in different modes, specifically, in different color displays.
- bolt 3 can be confirmed easily now.
- the sixth display unit 21 derives ⁇ [%] by comparing the variation in the tightening force of each bolt 3 at one point during the tightening operation using the scale on the right vertical axis. it can.
- the operator, the subject, and the like can determine whether ⁇ [%] at a certain tightening operation corresponds to any numerical range of A1 to A4.
- ⁇ [%] corresponds to A4 and the value exceeds 25%
- the spiral gasket is used, the outer periphery of the hoop is crushed, and the sealing performance of the gasket is lowered due to the reduction of the sealing area.
- the operator can determine that there is a risk. In this way, when the determination screen 10 is displayed, the operator can confirm ⁇ [%] by looking at the degree of variation [%] on the third display unit 13.
- the operator can examine the unit tightening operation of the subject in real time by displaying the determination screen 20 during the tightening operation of the determination test.
- the operator by the unit tightening operation performed on any of the bolts 3 in the first rounding operation of the flange fastening operation, causes the change amount ⁇ F of the fastening force to exceed 25% of the target fastening force F target.
- the judgment test can be immediately terminated.
- the ratio of the tightening force when the tightening operation of each bolt 3 is completed is displayed as ⁇ [%].
- the operator, the subject, and the like can determine which numerical range of ⁇ [%] belongs to C1 to C4.
- the value of (Reference) [%] of the second display part 12 and the sixth display part 21 as an example, when ⁇ [%] has not reached the target fastening force F target , It can be confirmed that there is a possibility that leakage may occur due to insufficient tightening force.
- the sixth display unit 21 can check in real time by operating the determination device 1 even during the measurement step (S2) of the determination test.
- the display unit 6 displays ⁇ , ⁇ , and ⁇ obtained by the calculation unit 50b in the calculation step in a manner that can be confirmed by a person. Therefore, for example, the operator and the subject can not only determine whether the skill of the flange fastening operation possessed by the subject is just a pass / fail for the judgment criteria by just looking at the display content of the display unit 6, but also the flange possessed by the subject It is possible to objectively and clearly evaluate whether the skill of the fastening operation corresponds to any of the three or more skill levels prepared in advance. In addition, by storing each data of the subject's judgment test in the storage unit 51 in association with the subject's ID information, the subject's ID information and the result of the subject's past judgment test can be confirmed at any time. Can do.
- a flange fastening skill determination device and a flange fastening skill determination program that can objectively and clearly determine the skill relating to the operator's flange fastening.
- FIG. 7 shows a graph determination screen 20A displayed on the display unit 6 in the determination device according to the second embodiment.
- a space coordinate system is used and ⁇ , ⁇ , and ⁇ are sequentially displayed in correspondence with the X axis, the Y axis, and the Z axis in the space coordinates.
- the numerical ranges of the skill levels corresponding to “III determination”, “II determination”, and “I determination” are indicated as cubic spaces Q1 to Q3, respectively.
- the numerical range of “NG determination” is shown as a space that does not overlap any of the spaces Q1 to Q3.
- Each value of ⁇ , ⁇ , and ⁇ of the subject obtained in the determination test is indicated as the position of the P point in the spatial coordinate system.
- ⁇ , ⁇ , and ⁇ acquired by the calculation unit 50b by the calculation in the calculation step can be displayed in a manner that can be confirmed by the operator and the subject.
- ⁇ , ⁇ , and ⁇ of each skill determination item are sequentially displayed in association with the X axis, the Y axis, and the Z axis, for example, the reason for the determination result of the subject determined by the determination unit 50c in the determination step Can be easily confirmed for each skill determination item using the graph determination screen 20A.
- the spaces Q1 to Q3 may be displayed in a distinguishable manner (for example, different colors) so that the spaces Q1 to Q3 indicating “III determination”, “II determination”, and “I determination” can be easily distinguished. .
- FIG. 8 shows a graph determination screen 20B displayed on the display unit 6 in the determination device according to the third embodiment.
- the graph determination screen 20B uses a two-dimensional coordinate system graph and displays each skill determination item individually and in parallel in the vertical direction.
- the numerical ranges (A1 to A4, B1 to B4, C1 to C4) of the determination criteria of “III determination”, “II determination”, “I determination”, and “NG determination” for each skill determination item are also combined. It is possible to display where the respective values of ⁇ , ⁇ , and ⁇ (indicated by bold lines L1 to L3 in the figure) of the subject obtained in the determination test are located in the numerical range of each determination criterion.
- ⁇ , ⁇ , and ⁇ acquired by the calculation unit 50b by the calculation in the calculation step can be displayed in a manner that can be confirmed by the operator and the subject.
- each value of ⁇ , ⁇ , and ⁇ can be checked individually and easily by checking the range of each criterion, and the level of the subject's ⁇ , ⁇ , and ⁇ is relative to each reference range. Can be examined in detail.
- the determination unit 50c performs the determination in the order of ⁇ , ⁇ , and ⁇ , but the present invention is not limited to this.
- the determination unit 50c may determine ⁇ , ⁇ , and ⁇ in any order.
- the receiving unit 4 in the determination apparatus 1 is separated from the PC 5, but the present invention is not limited to this configuration.
- the receiving unit 4 may be arranged inside the PC 5 and configured as a component of the PC 5.
- the storage unit 51 is not limited to the configuration arranged inside the PC 5, and for example, the storage unit may be arranged on an external network connected to the PC 5.
- the configuration of the output unit arranged in the determination apparatus is not limited to the display unit 6 as a display of the so-called PC 5.
- the determination result in the determination step of the determination unit 50c may be output to either paper or sheet or various recording media.
- the bolt tightening work that the present invention can judge the skill of course is not limited to the bolt tightening work for connecting the flanges of the piping in a production factory or the like.
- skill determination can be performed satisfactorily even in a bolting operation for sealing or connecting various structures such as a pressure vessel such as a decompression chamber or a rotating device such as a motor shaft or assembling. .
- the strain gauge used in the present invention may be provided individually corresponding to a plurality of bolts used for fastening. Therefore, for example, a strain gauge may be individually provided at each position corresponding to each bolt with respect to the gasket disposed between the pair of flanges of the dummy flange.
- a strain gauge is exemplified as the tightening force detector, but the tightening force detector is not limited to the strain gauge, and other configurations such as a piezoelectric element may be used.
- the same detection as in the case of using the strain gauge can be performed by arranging the piezoelectric elements at positions corresponding to the respective bolts between the pair of flanges.
- the strain gauge is not limited to the temperature correction three-wire type, and other types of strain gauges can be used.
- the skill relating to the fastening of the flange is determined using the three skill determination items of ⁇ , ⁇ , and ⁇ , but in some cases, only two skill determination items selected from these are determined. It can also be used to determine the skill related to the fastening of the flange. Even in such a case, the skill determination relating to the fastening of the flange can be performed from various viewpoints by two skill determination items, which is useful.
- a flange fastening skill judgment device and a flange fastening skill judgment program capable of objectively and clearly judging a skill related to a worker's flange fastening are provided. It has an excellent effect. Therefore, it is beneficial to apply widely as a flange fastening skill judging device and a flange fastening skill judging program capable of exhibiting the significance of this effect.
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Abstract
Description
[フランジ締結スキル判定装置1の構成]
図1及び図2に、実施形態1に係るフランジ締結スキル判定装置1(以下、「判定装置1」と称する。)を示す。判定装置1は、ダミーフランジ2と、ダミーフランジ2に取り付けられた複数の締付力検出器付ボルト3(以下、「ボルト3」と称する。)と、ボルト3から延びる配線が接続された受信部4と、受信部4に接続されたパーソナルコンピュータ5(以下、「PC5」と称する。)と、PC5に接続された表示部6及び入力手段7とを備える。
図3に示す動作フローに基づき、判定プログラムを用いた判定装置1による、フランジ締付スキル判定試験(以下、「判定試験」と称する。)の実施の概要を説明する。
演算ステップで得られるαは、各ボルト3の締付作業中における各々の歪ゲージの出力信号値のばらつきに対応しているので、αには、各ボルト3の締付力の経時的な変化の推移が示される。従って、β及びγにαを加えた3つの技能判定項目を用いることで、判定ステップでは、被験者の各ボルト3の締付に係るスキルを多角的なデータで捉えることが可能となり、前記スキルを各判定基準と照合することで的確に評価できる。
図5に示すように、処理部50は、出力ステップにおいて表示部6に判定画面10を表示させる。判定画面10は、第一表示部11と、第二表示部12と、第三表示部13と、第四表示部14と、第五表示部15とを含む。
図7は、実施形態2に係る判定装置において、表示部6に表示されるグラフ判定画面20Aを示している。
図8は、実施形態3に係る判定装置において、表示部6に表示されるグラフ判定画面20Bを示している。
実施形態1において、判定部50cは、α、β、γの順に判定を行ったが、本発明は、これに限定されない。判定部50cは、α、β、γをいずれの順で判定を行ってもよい。
2 ダミーフランジ
3、3a~3h 締付力検出器付ボルト
4 受信部
5 パーソナルコンピュータ(PC)
6 出力部
7 入力手段
50 処理部
50a 計測部
50b 演算部
50c 判定部
51 記憶部
Claims (9)
- フランジを連結するために締め付けられる複数のボルトに対し、個別に対応して設けられた各締付力検出器から、被験者の前記複数のボルトの締付作業に伴って出力される出力信号を受信する受信部と、
前記受信部が受信した、前記複数のボルト各々の締付作業開始時から締付作業完了時までの各々の前記出力信号の変化の推移を示す複数の計測結果を得る計測部と、
複数の前記計測結果を演算して、前記複数のボルトの締付作業中における各々の前記締付力検出器の出力信号値のばらつきを示す第一演算結果と、前記複数のボルトの締付作業完了時における各々の前記締付力検出器の出力信号値のばらつきを示す第二演算結果と、前記複数のボルトの前記締付作業完了時における各締付力の程度を示す第三演算結果と、をそれぞれ技能判定項目として得る演算部と、
各々の前記技能判定項目を判定基準と照合した結果に基づき、前記各ボルトの締付作業に係る被験者の技能を3つ以上の技能レベルのいずれであるかを判定する判定部と、
前記判定部による判定結果を出力する出力部とを備える、フランジ締結スキル判定装置。 - 前記複数のボルトの各々の前記締付作業は、複数の単位締付動作を含み、
前記演算部は、前記複数のボルトの締付作業中のいずれかの前記単位締付動作の完了時における各々の前記締付力検出器の出力信号値のうちの最大値と最小値との差を前記第一演算結果として得る、請求項1に記載のフランジ締結スキル判定装置。 - 前記演算部は、前記複数のボルトの前記締付作業中の全ての前記単位締付動作の完了時の前記出力信号値における最大値と最小値との最大差のものを前記第一演算結果として得る、請求項2に記載のフランジ締結スキル判定装置。
- 前記演算部は、前記複数のボルトの締付作業完了時における各々の前記出力信号値のうちの最大値と最小値との差を前記第二演算結果として得る、請求項1乃至3のいずれか1項に記載のフランジ締結スキル判定装置。
- 前記出力部は、前記判定部による前記判定結果を表示可能な表示部であり、
前記表示部には、前記判定部による前記判定結果が前記技能レベル毎に互いに異なる表示態様で区別可能に表示される、請求項1乃至4のいずれか1項に記載のフランジ締結スキル判定装置。 - 前記出力部は、前記第三演算結果を表示可能な表示部であり、
前記表示部には、前記第三演算結果が所定の数値範囲毎に異なる色表示で表示される、請求項1乃至5のいずれか1項に記載のフランジ締結スキル判定装置。 - 前記計測結果及び前記第一、第二、第三演算結果、並びに前記判定結果を記憶するための記憶部をさらに備える、請求項1乃至6のいずれか1項に記載のフランジ締結スキル判定装置。
- 前記記憶部は、さらに被験者のID情報を、前記計測結果及び前記第一、第二、第三演算結果、並びに前記判定結果と関連付けて記憶する、請求項7に記載のフランジ締結スキル判定装置。
- フランジを連結するために締め付けられる複数のボルトに対し、個別に対応して設けられた各締付力検出器から、被験者の前記複数のボルトの締付作業に伴って出力される出力信号を受信し、前記受信した前記複数のボルト各々の締付作業開始時から締付作業完了時までの各々の前記出力信号の変化の推移を示す複数の計測結果を得るとともに、複数の前記計測結果を演算して、前記複数のボルトの締付作業中における各々の前記締付力検出器の出力信号値のばらつきを示す第一演算結果と、前記複数のボルトの締付作業完了時における各々の前記締付力検出器の出力信号値のばらつきを示す第二演算結果と、前記複数のボルトの前記締付作業完了時における各締付力の程度を示す第三演算結果と、をそれぞれ技能判定項目として得る演算ステップと、
各々の前記技能判定項目を判定基準と照合した結果に基づき、前記各ボルトの締付作業に係る被験者の技能を3つ以上の技能レベルのいずれであるかを判定する判定ステップと、
前記判定ステップで得られた前記判定結果を出力する出力ステップと、をコンピュータに実行させる、フランジ締結スキル判定プログラム。
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KR1020167029322A KR101747622B1 (ko) | 2014-05-20 | 2015-04-16 | 플랜지 체결 스킬 판정 장치 및 매체에 저장된 플랜지 체결 스킬 판정 컴퓨터프로그램 |
PL15796589T PL3147080T3 (pl) | 2014-05-20 | 2015-04-16 | Urządzenie do określania kwalifikacji w mocowaniu kołnierzy i program do określania kwalifikacji w mocowaniu kołnierzy |
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EP15796589.8A EP3147080B1 (en) | 2014-05-20 | 2015-04-16 | Flange-fastening skill determination device and flange-fastening skill determination program |
US15/312,357 US9897501B2 (en) | 2014-05-20 | 2015-04-16 | Flange fastening skill determination apparatus and flange fastening skill determination program |
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JPH11101700A (ja) * | 1997-09-26 | 1999-04-13 | Daiichi Kogyo Kk | 多数ボルト締結体の締付け試験方法及び締付け評価試験装置 |
US20130047408A1 (en) * | 2010-05-03 | 2013-02-28 | Innovation Plus, Llc | System for performing predefined fastener installtion procedures |
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EP3147080A1 (en) | 2017-03-29 |
CN106457537B (zh) | 2018-06-22 |
JP6166222B2 (ja) | 2017-07-19 |
CN106457537A (zh) | 2017-02-22 |
MY162144A (en) | 2017-05-31 |
JP2015217497A (ja) | 2015-12-07 |
KR20160133562A (ko) | 2016-11-22 |
TW201546432A (zh) | 2015-12-16 |
EP3147080B1 (en) | 2018-12-26 |
EP3147080A4 (en) | 2017-06-21 |
US20170082510A1 (en) | 2017-03-23 |
KR101747622B1 (ko) | 2017-06-14 |
US9897501B2 (en) | 2018-02-20 |
PL3147080T3 (pl) | 2019-06-28 |
TWI637155B (zh) | 2018-10-01 |
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