JP2021015258A - Tightening experience method, experience system and program - Google Patents

Abstract

To make an operator more effectively recognize a situation caused by bolt tightening of the operator.SOLUTION: A tightening experience method includes: an acquisition step of acquiring the tightening strength of a bolt or a plurality of bolts attached to a flange, which is the tightening strength measured by a sensor; a calculation step of calculating, by simulation, stress applied on a seal material sandwiched between the flanges based on the acquired tightening strength; and a display step of displaying the calculated stress applied on the seal material on display means.SELECTED DRAWING: Figure 5

Description

The present invention relates to a tightening experience method, experience system, and program.

In the construction of connecting pipes and the like, a sealing material such as a gasket is sandwiched between one set of flanges and bolts penetrating the flanges are tightened to prevent fluid from leaking from the connecting portion of the pipes. It is necessary to keep the tightening force of the bolt within a certain range in order to prevent the occurrence of gaps in the flange and the damage of the sealing material.

On the other hand, a worker needs skill to tighten a bolt with an appropriate tightening force. In order for workers to become familiar with the tightening work of the bolt, the tightening force of the bolt is measured and the tightening force is illustrated in the training.

The limit range of the tightening force of the bolt is determined according to the type of sealing material, etc., and the operator can know from the measured tightening force and the limited range whether his / her own tightening in the training is appropriate. ..

Patent Document 1 discloses a system for practicing the work of tightening a flange of a pipe connection portion with a bolt. In this system, the distortion of the bolt is measured and the distortion is output to the display device. Patent Document 2 discloses that it receives an output signal of a strain gauge provided corresponding to a bolt and displays a numerical value of stress applied to a torque detector. Patent Document 3 discloses that a system capable of monitoring the construction status of a sealing material displays the measured axial force and the target axial force. Patent Document 4 discloses that the difference in axial force according to the difference in the surface state of a bolt or nut is displayed. Patent Document 5 discloses that a distribution figure of an axial force due to tightening of a bolt is drawn.

Japanese Unexamined Patent Publication No. 2015-141345 Japanese Unexamined Patent Publication No. 2015-215473 JP-A-2017-161388 International Publication No. 2018/003438 International Publication No. 2018/008585

It is difficult to concretely imagine what kind of state the sealing material will be due to the tightening force simply by showing the tightening force of the bolt and its limiting range. Therefore, there was a risk that the workers could not fully realize the significance of the training.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique for making an operator more effectively aware of a situation caused by tightening a bolt of an operator.

In order to solve the above problems, the tightening experience method according to the present invention is a tightening strength measured by a sensor, and includes an acquisition step of acquiring the strength of one or a plurality of bolts attached to the flange. , A calculation step of calculating the stress applied to the sealing material sandwiched between the flanges by simulation based on the acquired tightening strength, and a display step of displaying the calculated stress applied to the sealing material on the display means. And, including.

The tightening experience system according to the present invention acquires a sensor that measures the tightening strength of one or more bolts, a flange to which the one or more bolts are attached, and the tightening strength measured by the sensor. The acquisition means, the calculation means for calculating the stress applied to the sealing material sandwiched between the flanges by simulation based on the acquired tightening strength, and the calculated stress applied to the sealing material are displayed on the display means. Including display control means for causing.

The program according to the present invention is a tightening strength measured by a sensor, which is an acquisition means for acquiring the tightening strength of one or a plurality of bolts attached to a flange, and the acquired tightening strength. Based on this, the computer functions as a calculation means for calculating the stress applied to the sealing material sandwiched between the flanges by simulation and a display control means for displaying the calculated stress applied to the sealing material on the display means.

In one embodiment of the present invention, in the calculation step, stress applied to a portion corresponding to each element of the sealing material based on a finite element analysis based on a plurality of elements in which the flange and the sealing material are virtually divided. Is calculated, and in the display step, the calculated stress applied to the portion corresponding to each element of the sealing material may be displayed on the display means.

In one embodiment of the present invention, in the display step, the display mode of the image of the seal material to be displayed may be determined based on the calculated stress applied to the portion corresponding to each element of the seal material.

In one embodiment of the present invention, in the display step, an image of the sealing material and a plurality of symbols arranged at positions corresponding to the plurality of bolts in the simulation may be displayed.

In one embodiment of the present invention, in the display step, the symbol corresponding to the bolt may be displayed in a display mode corresponding to the tightening strength of each of the bolts.

In one embodiment of the invention, the tightening experience method is based on the specified type of sealant, the presence or absence of paste applied to the sealant, the thickness of the sealant, or the type of fluid specified. Further, a setting step for determining the correspondence between the stress and the display mode of the image of the sealing material may be included.

In one embodiment of the present invention, the tightening experience method may further include a start determination step of starting the calculation by the simulation when the period during which the tightening strength measured by the sensor does not change exceeds a predetermined threshold value. ..

In one embodiment of the present invention, the tightening experience method further includes an estimation step of estimating a location where fluid leaks from the sealing material based on the calculated stress applied to the sealing material, and the display step. Then, the symbol may be drawn at a position corresponding to the estimated portion in the image of the sealing material.

In one embodiment of the invention, the tightening experience method sets the value of the tightening strength of one of the one or more bolts based on the obtained tightening strength of the one or more bolts. Including the change step to be changed, the calculation step may calculate the stress applied to the sealing material sandwiched between the flanges based on the changed tightening strength.

According to the present invention, the operator can more effectively recognize the situation caused by tightening his / her own bolt.

It is a figure which shows an example of the tightening training system which concerns on embodiment of this invention. It is a block diagram which shows the structure of the information processing apparatus and the device connected to the information processing apparatus 1. It is a figure explaining the schematic procedure of the practice of tightening a bolt. It is a block diagram which shows the function realized by the tightening training system. It is a flow chart which shows an example of the processing of an information processing apparatus. It is a figure which shows an example of the tightening force acquired. It is a figure which shows an example of the image of the displayed gasket.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Among the components that appear, those having the same function are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 1 is a diagram showing an example of a tightening training system according to an embodiment of the present invention. The tightening training system includes an information processing device 1, a tightening measuring device 3, and a display 22. The tightening measuring device 3 includes a pipe 33 having flanges 34a and 34b, a gasket 37 sandwiched between the flanges 34a and 34b, a plurality of bolts 35 and nuts 36, and a pedestal 39 for fixing the pipe 33. The flanges 34a and 34b are annular members provided at the end of the pipe 33 and extending radially outward. The flanges 34a and 34b face each other and also have a plurality of holes penetrating the flanges 34a and 34b. Each of the plurality of bolts 35 passes through the holes, and nuts 36 are attached from both ends.

A set of nuts 36 attached to a bolt 35 sandwiches the flanges 34a and 34b. The nut 36 is tightened by a wrench 71 held by the operator, whereby the bolt 35 joins the flanges 34a, 34b. A tightening force sensor 31 (see FIG. 2) is embedded in each of the plurality of bolts 35. The tightening force sensor 31 is, for example, a strain sensor, and measures the tightening strength (for example, axial force) of the bolt 35 by the nut 36. The tightening force sensor 31 and the information processing device 1 are connected by wiring 41. Here, the measurement result may be transmitted wirelessly from the tightening force sensor 31 to the information processing device 1. In this case, the transmitter is connected to the tightening force sensor 31, and the receiver is connected to the information processing device 1.

FIG. 2 is a block diagram showing the configuration of the information processing device 1 and the devices connected to the information processing device 1. The information processing device 1 includes a processor 11, a storage unit 12, a communication unit 13, an image processing unit 14, and an input / output unit 15. The information processing device 1 is, for example, a personal computer.

The processor 11 operates according to the program stored in the storage unit 12, and controls the communication unit 13, the image processing unit 14, the input / output unit 15, and the like. The program may be stored in a computer-readable storage medium such as a flash memory and provided, or may be provided via a network such as the Internet.

The storage unit 12 is composed of a memory element such as a DRAM or a flash memory and an external storage device such as a hard disk drive. The storage unit 12 stores the above program. In addition, the storage unit 12 stores information and calculation results input from the processor 11, the communication unit 13, and the like.

The communication unit 13 is composed of integrated circuits, connectors, antennas, and the like that constitute a wired LAN or a wireless LAN. The communication unit 13 has a function of communicating with another device via a network. Based on the control of the processor 11, the communication unit 13 inputs the information received from the other device to the processor 11 and the storage unit 12, and transmits the information to the other device.

The image processing unit 14 includes a so-called GPU (Graphic Processing Unit), a frame buffer memory, and a display control circuit. The image processing unit 14 generates image data to be displayed on the display 22 and causes them to display the generated image. The display 22 may be a so-called flat display or a projector.

The input / output unit 15 includes an AD converter and an input / output controller that exchanges data with an external device. External devices include input devices such as keyboards, mice, and touch panels. Further, the AD converter is connected to the tightening force sensor 31 via the wiring 41. The input / output unit 15 acquires data input by the user operating the input device based on the control of the processor 11. Further, the input / output unit 15 converts the signal output from the tightening force sensor 31 by the AD converter into a numerical value, and delivers the converted numerical value to the processor 11 and the storage unit 12.

FIG. 3 is a diagram showing a schematic procedure of the practice of tightening the bolt 35. First, the training manager installs and adjusts the equipment and the like constituting the tightening training system (step S101). Then, the administrator sets the bolt 35 so as to be in the initial state of the training (step S102). The initial state of the training is that the nut 36 is manually attached to the bolt 35 and the nut 36 is not tightened with the wrench 71. When a plurality of workers practice, the steps after step S102 are repeated.

Once set to the initial state, the training will start. In the practical training, the operator tightens the plurality of bolts 35 by turning the nuts 36 attached to the flanges 34a and 34b of the tightening measuring device 3 with a wrench 71 (step S103). The worker may tighten each of the plurality of bolts 35 in a plurality of times according to a predetermined procedure specified in, for example, JIS standard, or the worker tightens the plurality of bolts 35 by a unique method. May be good.

After the training of tightening the bolt 35 by the operator is completed, the information processing apparatus 1 feeds back the result of tightening the bolt 35 to the operator (step S104). As feedback, the information processing device 1 includes a tightening force (specifically, a tightening torque or an axial force) of each of the plurality of bolts 35, an image showing whether the tightening force is within an allowable range, and a tightening force. The display 22 is controlled to display an image showing the state of the gasket 37 due to the applied force.

FIG. 4 is a block diagram showing the functions realized by the tightening training system. The tightening training system functionally includes a tightening force acquisition unit 51, a start control unit 52, a stress calculation unit 53, a tightening status display unit 54, a leak estimation unit 55, a tightening force changing unit 56, and a setting unit 61. Including. These functions are mainly realized by the processor 11 included in the information processing device 1 executing a program stored in the storage unit 12 and controlling the image processing unit 14 and the input / output unit 15 as needed. To. At least a part of these functions may be realized by executing a program in which a processor included in a computer different from the information processing device 1 is stored in the storage unit.

The tightening force acquisition unit 51 acquires a signal indicating the tightening strength of the bolt 35 by the nut 36 from the tightening force sensor 31 of the bolt 35 via the AD converter. Further, the tightening force acquisition unit 51 calculates and acquires the tightening force of the bolt 35 from the value of the signal.

The start control unit 52 starts the process of the stress calculation unit 53 based on the change in the tightening force of the plurality of bolts 35 acquired by the tightening force acquisition unit 51. More specifically, when the period during which the tightening force measured by the tightening force sensor 31 does not change exceeds the period threshold value, the processing of the stress calculation unit 53 is started.

The stress calculation unit 53 calculates the stress applied to the gasket 37 sandwiched between the flanges 34a and 34b by simulation based on the tightening force acquired by the tightening force acquisition unit 51. The stress calculation unit 53 calculates, in particular, the normal stress at each position on the surface of the gasket 37 with respect to the axial force of the bolt 35.

The tightening status display unit 54 causes the display 22 to display the strength of the tightening force and the stress applied to the gasket 37 calculated by the stress calculation unit 53. Here, the stress displayed on the display 22 is a normal stress at each position on the surface of the gasket 37 with respect to the axial force of the bolt 35. The tightening status display unit 54 determines a display mode (for example, color or shade) of the gasket to be displayed on the display 22 based on the normal stress applied to the portion corresponding to each element of the gasket 37, and displays the gasket in the display mode. It may be displayed. Further, the tightening status display unit 54 may display a plurality of symbols 91 to 98 arranged at positions corresponding to the plurality of bolts 35 in the simulation together with the image 90 of the gasket (see FIG. 7). Here, the tightening status display unit 54 may display the strength of the tightening force and the stress applied to the gasket 37 on different displays 22.

The leakage estimation unit 55 estimates whether or not fluid leaks from the gasket 37 based on the calculated stress applied to the gasket 37, and if a leak occurs, estimates the location of the leakage in the gasket 37. .. When it is presumed that a leak will occur, the tightening status display unit 54 displays the image 90 of the gasket and a symbol indicating the leak location at a position corresponding to the presumed location.

The tightening force changing unit 56 changes the value of the tightening force of one of the plurality of bolts 35 based on the tightening force acquired for the plurality of bolts 35. When the value of the tightening force is changed, the stress calculation unit 53 calculates the stress applied to the gasket 37 by the tightening force after the change, separately from the stress applied to the gasket 37 by the tightening force before the change, and tightens the gasket 37. The attachment status display unit 54 causes the display 22 to display the stress applied to the gasket 37 due to the tightening force after the change.

The setting unit 61 acquires the type of gasket 37 sandwiched between the flanges 34a and 34b and the type of fluid expected to flow in the pipe 33, and the tightening status is based on the acquired type of fluid. A rule corresponding to the display mode of the gasket displayed by the display unit 54 and the stress (particularly normal stress) is determined.

FIG. 5 is a flow chart showing an example of processing of the information processing apparatus 1, and in particular, shows an example of processing of the tightening force acquisition unit 51, the start control unit 52, the stress calculation unit 53, and the tightening status display unit 54. .. The process shown in FIG. 5 corresponds to the process of the information processing apparatus 1 in steps S103 and S104. In other words, the process shown in FIG. 5 is performed each time the operator starts the practice of tightening the bolt 35. The start of the training may be instructed by the operator who manages the tightening training system.

The setting unit 61 acquires the type of gasket 37 arranged between the flanges 34a and 34b and the type of fluid that is expected to pass through the pipe 33 that is the subject of this training (step S401). Further, the setting unit 61 acquires the allowable lower limit value, the allowable upper limit value, and the ideal value of the tightening force associated with the gasket type and the fluid type. The allowable lower limit value, the allowable upper limit value, and the ideal value of the tightening force are stored in the storage unit 12 in advance in association with a combination of a plurality of gasket types and a plurality of fluid types. Then, the setting unit 61 associates the stress calculated by the stress calculation unit 53 with the display mode of the gasket output by the tightening status display unit 54 according to the type of gasket 37 and the type of fluid (step S402). .. The display mode is, for example, a color or shade drawn on each portion of each image of the gasket, and is stored in the storage unit 12 in advance in association with the type of gasket and the type of fluid. The setting unit 61 acquires information (corresponding rule) indicating the relationship between the stress and the gasket associated with the acquired type of gasket 37 and the type of fluid. The details of the display mode will be described later. The processes of steps S401 and S402 may be performed before the start of the practical training.

Here, the setting unit 61 further acquires at least one parameter of the presence or absence of the gasket paste applied to the sealing surface of the gasket 37 to improve the sealing property and the thickness of the gasket 37, and the setting unit 61 further acquires the parameters of the gasket 37. Even if the corresponding rule between the gasket display mode displayed by the tightening status display unit 54 and the stress (particularly normal stress) is determined based on not only the type of the gasket and the type of the fluid but also the acquired parameters. Good. In this case, the allowable lower limit value, the allowable upper limit value, and the ideal value of the tightening force are stored in the storage unit 12 in advance in association with a plurality of gasket types, a plurality of fluid types, and a combination of additional parameters. The thickness of the gasket paste and the gasket 37 may also affect the allowable upper limit value and the like.

The tightening force acquisition unit 51 acquires the tightening force of each of the plurality of bolts 35 and stores them in the storage unit 12 (step S403). The tightening status display unit 54 draws a graph showing the strength of the acquired tightening force (step S404). Here, in order to enhance the effect of the worker's training, the graph may be displayed on the display 22 installed so that the tightening worker cannot see it.

FIG. 6 is a diagram showing an example of the tightening force acquired by the tightening force acquisition unit 51, and shows a graph drawn in step S404. In the display method of FIG. 6, the tightening status display unit 54 uses the item axis, the point of the measured value of the tightening force of the bolt 35, the measured line 81, the lower limit line 83, the upper limit line 84, and the ideal line 85. And draw. The item axis extends from the center point in the direction corresponding to each of the bolts 35. The points of the measured value are plotted on the item axis according to the value. Adjacent plotted points are connected by an actual measurement line 81. The diagram of this display method is also called a radar chart. The allowable range of tightening force is between the allowable lower limit value and the allowable upper limit value, the lower limit line 83 is a line connecting the points corresponding to the allowable lower limit value, and the upper limit line 84 is a line connecting the points corresponding to the allowable upper limit value. is there. When a point of the measured value constituting the measured line 81 is included between the lower limit line 83 and the upper limit line 84, the tightening by the operator is appropriately performed. The ideal line 85 indicates an ideal tightening force value.

The start control unit 52 determines whether the length of the period during which the tightening force of the acquired plurality of bolts 35 does not change exceeds the period threshold value (step S405). If the length of the period does not exceed the period threshold value (N in step S405), the processes after step S401 are repeated, and if the length of the period exceeds the period threshold value (Y in step S405), the operation. It is determined that the tightening of the person has been completed, and the processes after step S406 are executed. The start control unit 52 may simply start the processing after step S406 when the operator receives an instruction to the effect that the tightening of the operator has been completed.

In the example of FIG. 5, the graph is repeatedly drawn during the tightening work of the worker, but the graph may be drawn only once after the tightening of the worker is completed. Further, the processing of the start control unit 52 does not have to be performed. For example, the tightening force acquisition unit 51 acquires the final tightening force of the plurality of bolts 35 measured by another device as an input, and the final tightening force thereof is acquired. The stress calculation unit 53 and subsequent processes may be performed using the acquired tightening force.

The stress calculation unit 53 calculates the stress generated by the tightening force of each of the plurality of bolts 35 based on the finite element analysis (FEM), and the stress applied to each of the portions constituting the gasket 37 (step S406). ). More specifically, the stress calculation unit 53 inputs the tightening force of the bolt 35 to the gasket 37 by inputting the tightening force of the bolt 35 to the physical model composed of a plurality of elements in which the flanges 34a and 34b and the gasket 37 are virtually divided. Calculate the normal stress applied to the location on the surface corresponding to each of the plurality of contained elements. Since the calculation of stress by finite element analysis is a known technique, detailed description thereof will be omitted.

Then, the leakage estimation unit 55 estimates leakage from the joint portion of the flanges 34a and 34b based on the calculated stress applied to the gasket 37 (step S407). Here, the leakage estimation unit 55 acquires the lower limit value and the upper limit value of the stress according to the type of the gasket 37 and the type of the fluid. When the minimum stress value of the gasket 37 is smaller than the lower limit value, the leakage estimation unit 55 estimates that there is fluid leakage, and the minimum value of the stress is calculated on the outer circumference of the gasket 37. The outer part is estimated to be the leak point. On the other hand, the leakage estimation unit 55 estimates that there is fluid leakage even when the maximum value of the stress of the gasket 37 is larger than the upper limit value, and the portion of the outer circumference of the gasket 37 where the maximum value of the stress is calculated. The outer part of is estimated to be the leak point. Further, the leakage estimation unit 55 may further estimate the amount of leakage based on the stress.

After the stress is calculated, the tightening status display unit 54 draws an image 90 of the gasket (step S408). The tightening status display unit 54 draws the image 90 of the gasket so that each part of the gasket to be drawn has a display mode corresponding to the corresponding rule set by the setting unit 61 and the calculated stress. Further, the tightening status display unit 54 draws an image of the symbol at a position corresponding to the bolt 35 together with the image 90 of the gasket (step S409). The tightening status display unit 54 further draws an image showing leakage at a position corresponding to the estimated leakage location together with the image 90 of the gasket when leakage from the joint portion of the flanges 34a and 34b is estimated. (Step S410).

FIG. 7 is a diagram showing an example of the displayed gasket image 90. The grid included in image 90 of the gasket of FIG. 7 corresponds to the divided elements in the finite element analysis. Symbols 91 to 98 correspond one-to-one with a plurality of bolts 35 of the tightening measuring device 3, and the tightening status display unit 54 has a bolt 35 whose relative position with respect to each gasket of symbols 91 to 98 corresponds to the bolt 35. Symbols 91 to 98 are drawn so as to overlap with the relative positions of the gasket 37 and the gasket 37. The tightening status display unit 54 may simply draw symbols 91 to 98 so that the direction seen from the center of the annular ring of the gasket coincides with the symbols 91 to 98 and the corresponding bolts 35. Further, as shown in FIG. 7, the tightening status display unit 54 also draws an arrow 99, which is a symbol indicating a leak location.

The relationship between stress and color in the corresponding rule is determined according to the type of gasket 37 and the type of fluid. For example, regardless of the type of gasket 37 and the type of fluid, the type of color used for stresses below the lower limit, the type of color used for stresses higher than the upper limit, and the stress between the lower and upper limits. The relationship between stress and color is defined so that the type of color to be used is constant. As a result, it is possible to easily recognize from the image 90 of the gasket whether the bolt 35 was properly tightened regardless of the type of gasket 37 or the type of fluid.

When the type of fluid is gas, it is more likely to leak than liquid. Therefore, the lower limit of stress is larger for gas than for liquid. Since the upper limit of stress is mainly determined by whether or not the gasket 37 is broken, it does not have to change depending on the type of fluid. Further, since the difference in allowable stress depending on the type of fluid is smaller than the difference in gasket, the corresponding rule between stress and display mode may be determined only according to the type of gasket.

By displaying the stress applied to the gasket 37 in color or shade, the operator can more effectively recognize the state of the gasket 37 by tightening his / her own bolt 35. It also allows the worker to become more effective in learning. Further, the state of the gasket 37 can be effectively recognized by displaying the information indicating the leakage together with the stress. When the amount of leakage is estimated, the tightening status display unit 54 may draw a symbol of a size or color according to the amount of leakage.

Here, the tightening status display unit 54 may change the display mode of each of the symbols 91 to 98 corresponding to the plurality of bolts 35 according to the tightening force of the bolts 35. For example, each of the symbols 91 to 98 may be drawn in a color corresponding to the tightening force of the bolt 35 corresponding to the symbol. For example, a color when the tightening force is lower than the lower limit value, a color when the tightening force is between the lower limit value and the upper limit value, and a color when the tightening force exceeds the upper limit value are predetermined, and the tightening status display unit 54 tightens the bolt 35. The color determined according to the force may be acquired and the symbol corresponding to the bolt 35 may be drawn.

In the explanation of FIG. 5, the process relating to the tightening force changing portion 56 is not described. When the tightening force changing unit 56 changes the tightening force, the tightening status display unit 54 is changed by executing the processes of steps S404 and steps S406 to S410 for the changed tightening force. Draw an image of the gasket etc. about the force.

For example, when the tightening force of some of the plurality of bolts 35 is lower than the lower limit value, the tightening force changing unit 56 may set the value of the tightening force of the bolt 35 having the lowest tightening force to an ideal value. .. On the other hand, when the difference between the tightening force of some of the plurality of bolts 35 and the upper limit value is smaller than the threshold value, the tightening force changing unit 56 has the tightening force of some of the bolts 35 or all of the bolts 35. The value of may be increased by a predetermined value. By displaying an image showing the stress of the gasket 37 in that case, the operator can know the possibility of improving the tightening state.

1 Information processing device, 3 Tightening measuring device, 11 Processor, 12 Storage unit, 13 Communication unit, 14 Image processing unit, 15 Input / output unit, 22 Display, 31 Tightening force sensor, 33 Piping, 34a, 34b Flange, 35 Bolts, 36 nuts, 37 gaskets, 39 mounts, 41 wiring, 51 tightening force acquisition unit, 52 start control unit, 53 stress calculation unit, 54 tightening status display unit, 55 leakage estimation unit, 56 tightening force change unit, 61 Setting part, 71 Wrench, 81 Actual measurement line, 83 Lower limit line, 84 Upper limit line, 85 Ideal line, 90 Gasket image, 91,92,93,94,95,96,97,98 Symbol, 99 arrow.

Claims (11)

The acquisition step of acquiring the tightening strength of one or more bolts attached to the flange, which is the tightening strength measured by the sensor.
A calculation step of calculating the stress applied to the sealing material sandwiched between the flanges by simulation based on the acquired tightening strength, and a calculation step.
A display step for displaying the calculated stress applied to the sealing material on the display means, and
Tightening experience method including. In the tightening experience method according to claim 1,
In the calculation step, the stress applied to the portion corresponding to each element of the sealing material is calculated based on the finite element analysis based on a plurality of elements in which the flange and the sealing material are virtually divided.
In the display step, the display means displays the calculated stress applied to the portion corresponding to each element of the sealing material.
Tightening experience method. In the tightening experience method according to claim 2,
In the display step, the display mode of the image of the sealing material to be displayed is determined based on the calculated stress applied to the portion corresponding to each element of the sealing material.
Tightening experience method. In the tightening experience method according to any one of claims 1 to 3,
In the display step, an image of the sealing material and a plurality of symbols arranged at positions corresponding to the plurality of bolts in the simulation are displayed.
Tightening experience method. In the tightening experience method according to claim 4,
In the display step, a symbol corresponding to the bolt is displayed in a display mode according to the tightening strength of each of the bolts.
Tightening experience method. In the tightening experience method according to any one of claims 1 to 5,
Based on the specified type of the sealing material, the presence or absence of the paste applied to the sealing material, the thickness of the sealing material, or the specified type of fluid, the stress and the display mode of the image of the sealing material. Including additional configuration steps to determine the correspondence of
Tightening experience method. In the tightening experience method according to any one of claims 1 to 6,
Further including a start determination step of starting the calculation by the simulation when the period during which the tightening strength measured by the sensor does not change exceeds a predetermined threshold value.
Tightening experience method. In the tightening experience method according to any one of claims 1 to 7,
Further comprising an estimation step of estimating a location where fluid leaks from the sealant based on the calculated stress on the sealant.
In the display step, the symbol is drawn at a position corresponding to the estimated portion in the image of the sealing material.
Tightening experience method. In the tightening experience method according to any one of claims 1 to 8,
It further comprises a modification step of changing the value of the tightening strength of one of the one or more bolts based on the obtained tightening strength of the one or more bolts.
In the calculation step, the stress applied to the sealing material sandwiched between the flanges is calculated based on the changed tightening strength.
Tightening experience method. A sensor that measures the tightening strength of one or more bolts,
With the flange to which the one or more bolts are attached,
An acquisition means for acquiring the tightening strength measured by the sensor, and
A calculation means for calculating the stress applied to the sealing material sandwiched between the flanges by simulation based on the obtained tightening strength.
A display control means for displaying the calculated stress applied to the sealing material on the display means, and
Experience system including. An acquisition means for obtaining the tightening strength of one or more bolts attached to a flange, which is the tightening strength measured by a sensor.
A calculation means for calculating the stress applied to the sealing material sandwiched between the flanges by simulation based on the obtained tightening strength, and a calculation means.
A display control means for displaying the calculated stress applied to the sealing material on the display means,
A program to make your computer work as.

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