JP5442895B1 - Gasket tightening calculation system, control method and program for gasket tightening calculation system - Google Patents

Abstract

An object of the present invention is to reduce a user's burden when grasping an accurate tightening torque.
A first tightening force calculation means (34) of a gasket tightening calculation system (1) includes an effective width and an effective diameter corresponding to a specified size, a specified pressure, and a specified gasket. The first tightening force is calculated based on the gasket coefficient. The second tightening force calculating means (35) calculates the second tightening force based on the effective width and effective diameter and the specified minimum design tightening pressure of the gasket. The third tightening force calculation means (36) multiplies the gasket contact area corresponding to the designated size by the minimum tightening surface pressure corresponding to the designated gasket and the type of internal fluid, Calculate the applied force. The minimum tightening torque calculating means (37) calculates the minimum tightening torque based on the maximum of the first tightening force, the second tightening force, and the third tightening force and the information on the bolt. calculate. The presenting means (43) presents the minimum tightening torque to the user.
[Selection] Figure 2

Description

  The present invention relates to a gasket tightening calculation system, a control method for a gasket tightening calculation system, and a program.

  2. Description of the Related Art Conventionally, a technique is known in which a gasket is inserted into a pipe or the like and compressed to close a gap and prevent leakage of internal fluid or entry of foreign matter from the outside. For example, Patent Document 1 describes a gasket that realizes appropriate sealing with a relatively weak tightening force even when the unevenness of the flange surface is large. Non-Patent Document 1 describes a method for calculating a gasket clamping force necessary for sealing an internal fluid.

JP 2007-92904 A JIS B 8265: 2010

  In the above-described technology, if the user does not select a gasket suitable for the use conditions (for example, the type and temperature of the internal fluid) and install it correctly, there is a possibility that the device may become inoperable or malfunction. For example, if the gasket tightening force is weak, the internal fluid may leak, so the user needs to accurately grasp the bolt tightening torque.

  In this regard, depending on the use conditions of the user, the tightening torque determined in Non-Patent Document 1 may be insufficient. For this reason, it is desirable for the user to study the tightening torque using other calculation methods that take into account the use conditions. However, there are many types of gaskets provided by manufacturers, and there are many conditions that should be considered when selecting gaskets. If the user tries to determine the exact tightening torque, it may take time to select gaskets. There is.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its purpose is to provide a gasket tightening calculation system and a gasket tightening calculation system capable of reducing a user's burden when grasping an accurate tightening torque. It is in providing a control method and a program.

  In order to solve the above problems, a gasket tightening calculation system according to the present invention includes a plurality of types of gaskets, a gasket coefficient, a minimum design tightening pressure, and a minimum tightening surface pressure according to the type of internal fluid. , A storage unit that stores a database associated with each other, a receiving unit that receives designation by a user of any of the plurality of types of gaskets, a size and a pressure related to the gasket, and a type of internal fluid, and the specified size Based on the effective width and effective diameter corresponding to, the specified pressure, and the gasket coefficient of the specified gasket, the first tightening force of the gasket required to prevent the flange from being opened by internal pressure is calculated. Based on the first tightening force calculating means, the effective width and the effective diameter, and the minimum design tightening pressure of the designated gasket. A second tightening force calculating means for calculating a second tightening force of the gasket necessary for preventing permeation leakage or contact surface leakage, a gasket contact area corresponding to the specified size, and the specified Acquire information on a third tightening force calculating means for calculating a third tightening force by multiplying the minimum tightening surface pressure corresponding to the type of the gasket and the internal fluid, and a bolt for tightening the designated gasket. Necessary to prevent internal fluid from leaking based on the acquisition means, the maximum of the first tightening force, the second tightening force, and the third tightening force, and information on the bolt. A minimum tightening torque calculating means for calculating a minimum tightening torque of the bolt, and a presenting means for presenting the minimum tightening torque to the user in association with the designated gasket.

  Further, the control method of the gasket tightening calculation system according to the present invention associates each of a plurality of types of gaskets with the gasket coefficient, the minimum design tightening pressure, and the minimum tightening surface pressure according to the type of internal fluid. Receiving the stored content of the storage means for storing the database, accepting step for accepting designation by the user of any of the plurality of types of gaskets, the size and pressure related to the gaskets, and the type of internal fluid; and Based on the effective width and effective diameter corresponding to the specified size, the specified pressure, and the gasket coefficient of the specified gasket, the first tightening of the gasket necessary to prevent the flange from opening at the internal pressure. A first tightening force calculating step for calculating an attaching force, the effective width and the effective diameter, and a minimum design tightening of the designated gasket; A second tightening force calculating step for calculating a second tightening force of the gasket necessary to prevent internal fluid seepage leakage or contact surface leakage based on the force, and corresponding to the specified size A third tightening force calculation step of calculating a third tightening force by multiplying the gasket contact area by the minimum tightening surface pressure corresponding to the specified gasket and the type of internal fluid; Based on the obtaining step of obtaining information on the bolt for tightening the gasket, the maximum of the first tightening force, the second tightening force, and the third tightening force, and the information on the bolt. A minimum tightening torque calculating step for calculating a minimum tightening torque of a bolt necessary for preventing internal fluid from leaking, and a suggestion for presenting the minimum tightening torque to the user in association with the designated gasket. A step, characterized in that it comprises a.

  Further, the program according to the present invention stores a database that associates each of a plurality of types of gaskets with a gasket coefficient, a minimum design tightening pressure, and a minimum tightening surface pressure according to the type of internal fluid. Means for acquiring the stored content, receiving means for accepting designation by the user of any of the plurality of types of gaskets, the size and pressure relating to the gaskets, and the type of internal fluid, an effective width corresponding to the designated size And a first tightening force for calculating a first tightening force of the gasket required to prevent the flange from being opened by the internal pressure based on the effective diameter, the specified pressure, and the gasket coefficient of the specified gasket. Based on the force calculation means, the effective width and the effective diameter, and the minimum design tightening pressure of the designated gasket, the penetration leak or contact of the internal fluid Second tightening force calculation means for calculating the second tightening force of the gasket necessary to prevent leakage, gasket contact area corresponding to the specified size, and the specified gasket and internal fluid type A third tightening force calculating means for calculating a third tightening force by multiplying the corresponding minimum tightening surface pressure, an acquiring means for acquiring information on a bolt for tightening the designated gasket, and the first tightening The minimum tightening torque of the bolt necessary to prevent internal fluid from leaking based on the maximum of the force, the second tightening force, and the third tightening force and the information on the bolt The computer is caused to function as a minimum tightening torque calculating means that performs the presenting means for presenting the minimum tightening torque to the user in association with the designated gasket.

  An information storage medium according to the present invention is a computer-readable information storage medium recording the above program.

  In the aspect of the invention, each of the plurality of types of gaskets and an allowable surface pressure are associated with the database, and the gasket tightening calculation system includes the gasket contact area and the designation. A bolt for preventing the specified gasket from being compressed and broken based on the means for calculating the allowable tightening force by multiplying the allowable surface pressure of the gasket and the information regarding the allowable tightening force and the bolt. Means for calculating a permissible tightening torque, wherein the presenting means presents the permissible tightening torque to the user in association with the designated gasket.

  Further, in one aspect of the present invention, the gasket tightening calculation system uses a bolt when the specified gasket is tightened with the minimum tightening torque based on the minimum tightening torque and the information about the bolt. Stress calculating means for calculating such stress is further included, wherein the presenting means presents the calculated stress to the user in association with the designated gasket.

  In one aspect of the present invention, the information about the bolt includes information about a durability stress of the bolt, and the gasket tightening calculation system determines whether the calculated stress exceeds the durability stress. The information processing apparatus further includes a determination unit, and the presentation unit presents the determination result of the stress determination unit to the user.

  In the aspect of the invention, the information on the bolt includes information on durability stress of each of the plurality of types of bolts, and the gasket tightening calculation system includes the calculated stress among the plurality of types of bolts. Means for retrieving a bolt having a greater durability stress than the presenting means, and when the calculated stress is determined to exceed the durability stress, the presenting means presents the retrieved other bolt to the user. It is characterized by.

  In one aspect of the present invention, the gasket tightening calculation system further includes means for searching for a gasket whose stress calculated by the stress calculating means does not exceed the endurance stress from the plurality of types of gaskets. The presenting means presents the retrieved other gasket to the user when it is determined that the calculated stress exceeds the durability stress.

  In the aspect of the invention, the database associates each of the plurality of types of gaskets with a usable condition, and the accepting unit determines whether the designated gasket is used by the user. Accepting the designation, the gasket tightening calculation system further includes a usability judging means for judging whether or not the designated use condition satisfies a usable condition associated with the designated gasket, and the presentation The means presents the determination result of the usability determination means to the user.

  In one aspect of the present invention, the information about the bolt includes information about a durability stress of the bolt, and the gasket tightening calculation system calculates a tightening torque allowed for the bolt based on the durability stress. The presenting means further presents a tightening torque allowed for the bolt to the user in association with the designated gasket.

  In one aspect of the present invention, when the presenting means presents the minimum tightening torque, the accepting means accepts an ordering operation by the user of the designated gasket, and the gasket tightening calculation system includes: And an ordering process executing means for executing an ordering process for the designated gasket when an ordering operation by the user is received.

Moreover, in one aspect of the present invention, the receiving means receives designation by the user of information about a bolt when the gasket is used, and the information about the bolt includes information about durability stress of the bolt, and the gasket tightening calculation system A stress calculating means for calculating a stress applied to the specified bolt when the specified gasket is tightened with the minimum tightening torque based on the minimum tightening torque and the information on the bolt; A stress determination unit that determines whether or not the calculated stress exceeds the endurance stress; and when the stress determination unit determines that the endurance stress has been exceeded, execution of the order processing by the order processing execution unit is limited And means for performing the processing.

  In one aspect of the present invention, the order processing execution means prints the minimum tightening torque on an attached sheet when the gasket is shipped, when executing the order processing of the designated gasket. It is characterized by that.

  In one aspect of the present invention, the gasket tightening calculation system further includes means for storing information relating to an inventory amount and a delivery date of each of the plurality of types of gaskets, and the presenting means includes the minimum tightening torque. When presenting to the user, the information regarding the inventory amount and delivery date of the designated gasket is presented to the user.

Moreover, in one aspect of the present invention, the receiving means receives designation by the user of information about a bolt when the gasket is used, and the information about the bolt includes information about durability stress of the bolt, and the gasket tightening calculation system A stress calculating means for calculating a stress applied to the specified bolt when the specified gasket is tightened with the minimum tightening torque based on the minimum tightening torque and the information on the bolt; Information on the inventory amount and delivery date of the designated gasket when it is determined by the stress determination means that the calculated stress exceeds the durability stress, and when the stress determination means determines that the durability stress has been exceeded. And means for restricting the presentation of.

  Moreover, in one aspect of the present invention, the order processing means updates information related to the inventory amount and delivery date of each of the plurality of gaskets in accordance with the order processing of the designated gasket.

  In the aspect of the invention, the accepting unit accepts designation by the user for a device using the designated gasket, and the gasket tightening calculation system executes an ordering process by the ordering processing unit. And a means for recording order information relating to the gasket ordered by the user in association with the designated device, wherein the presenting means specifies the device by the user after the order information is recorded. The order information associated with the designated device is presented to the user.

  In one aspect of the present invention, the order information includes information on the type of gasket specified by the user at the time of past ordering, the size and pressure related to the gasket, and the type of internal fluid. Each of the first tightening force calculation means, the second tightening force calculation means, and the third tightening calculation means is based on the order information at the time of past ordering, and the first tightening force, the second tightening force, Each of the tightening force and the third tightening force is calculated.

  According to the present invention, it is possible to reduce a user's burden when grasping an accurate tightening torque.

It is a figure showing the whole gasket tightening calculation system composition concerning this embodiment. It is a functional block diagram which shows the function relevant to this invention among the functions implement | achieved by a gasket fastening calculation system. It is a figure which shows an example of a fastening calculation database. It is a figure which shows an example of a setting reference | standard database. It is a figure which shows an example of a recommendation gasket database. It is an example of the input screen displayed on a display part. It is a figure which shows an example of the tightening calculation result screen displayed on a display part. It is a figure which shows an example of the tightening calculation result screen where the alert was displayed. It is a flowchart which shows the process which a gasket fastening calculation system performs. It is a functional block diagram of a modification. It is a figure which shows an example of the tightening calculation result screen in a modification (1). It is a figure which shows an example of the tightening calculation result screen in a modification (2). It is a figure which shows an example of the tightening calculation result screen in a modification (3). It is a figure which shows an example of the tightening calculation result screen in a modification (4).

[1. Overall configuration of gasket tightening calculation system]
Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an overall configuration of a gasket tightening calculation system according to the present embodiment. As shown in FIG. 1, the gasket tightening calculation system 1 includes a user device 10 and a server device 20. The user device 10 and the server device 20 are connected to each other via a network N so as to be able to transmit and receive data. In FIG. 1, the user device 10 is described as a plurality of devices, but the user device 10 may be a single device. Moreover, although the server apparatus 20 is demonstrated as one unit, the server apparatus 20 may be plural.

  The user device 10 is realized by a personal computer, a portable terminal (smart phone or tablet type terminal), or the like. The user device 10 is operated by a user. For example, a customer who purchases a gasket or a sales representative of a gasket manufacturer corresponds to a user who operates the user device 10.

  The user device 10 includes, for example, a control unit 11 including a CPU, a storage unit 12 that stores various programs (applications) and various data necessary to execute the programs, a keyboard and a pointing device (for example, a mouse, An operation unit 13 including a touch panel), a display unit 14 including a liquid crystal display, and a communication unit 15 including a network card for performing wired or wireless communication with other devices. .

  In the present embodiment, a program (hereinafter simply referred to as a gasket app) used when a user selects a gasket is stored in the storage unit 12. Gaskets include standard products with predetermined dimensions and individual dimensional products that are sized according to customer requirements. Here, for simplification of explanation, the user selects standard products. Will be described.

  The server device 20 is a server computer and is managed by, for example, a gasket manufacturer. For example, the server device 20 communicates with other devices by wired or wireless communication with a control unit 21 including a CPU, a storage unit 22 that stores various programs and various data necessary to execute the programs, and the like. And a communication unit 23 composed of a network card or the like. The server device 20 distributes data and programs stored in the storage unit 22 to the user device 10 in response to a request from the user device 10. Although the case where data and programs are stored in the storage unit 22 will be described here, these may be stored in a database server connected to the server device 20.

  The user apparatus 10 and the server apparatus 20 can apply various computer hardware. For example, the user device 10 and the server device 20 may include an information storage medium reading device. Furthermore, in the present embodiment, programs and various data described as being stored in the storage unit 12 or the storage unit 22 may be acquired from an external storage medium such as an optical disk or a flash memory, or a network may be used. Via an external computer.

[2. Functions realized in gasket tightening calculation system]
FIG. 2 is a functional block diagram showing functions related to the present invention among the functions realized by the gasket tightening calculation system 1. As shown in FIG. 2, the gasket tightening calculation system 1 includes a database storage unit 30, a gasket information acquisition unit 31, a bolt information acquisition unit 32, a reception unit 33, a first tightening force calculation unit 34, and a second tightening force. Calculation unit 35, third tightening force calculation unit 36, minimum tightening torque calculation unit 37, allowable tightening force calculation unit 38, allowable tightening torque calculation unit 39, stress calculation unit 40, stress determination unit 41, availability determination The unit 42 and the presentation unit 43 are realized.

  Each of these functions is realized by the control unit 11 executing a gasket application. In the present embodiment, the database storage unit 30 is realized mainly by the storage unit 22, and other functions are realized mainly by the control unit 11. In addition, other than the database storage unit 30, the bolt information acquisition unit 32, the reception unit 33, the first tightening force calculation unit 34, the second tightening force calculation unit 35, the third tightening force calculation unit 36, and the presentation unit 43. The function may be omitted.

[2-1. Database storage unit]
The database storage unit 30 stores a gasket database in which various information related to gaskets is stored. For example, the gasket database includes a tightening calculation database storing data necessary for performing gasket tightening calculation, a setting reference database storing values set for each gasket, each gasket and usable conditions, and the like. And a recommended gasket database associated with each other.

  FIG. 3 is a diagram illustrating an example of a tightening calculation database. In this embodiment, the tightening calculation database includes each of a plurality of types of gaskets, a pressure class (flange standard) that is a standard related to pressure, a size (nominal diameter) that is a standard related to the size of the gasket, and a gasket type. Inner diameter and outer diameter (unit: [mm]), flange seat RF diameter (unit: [mm]) which is the diameter of the flange in contact with the gasket, and bolts for tightening the gasket The information is associated with the internal pressure P of the gasket (the unit is [MPa]).

Here, since a standard gasket is described as an example, a symbol string defined by a standard such as JIS is stored in the pressure class (flange standard) and size (nominal diameter), for example. Moreover, the information regarding a bolt is information regarding the bolt used when fastening the gasket stored in the same record, for example, the number of bolts n, the type of bolt, the outer diameter D of the bolt (the unit is [mm]). ), And a bolt valley diameter cross-sectional area (unit: [mm ² ]).

FIG. 4 is a diagram illustrating an example of the setting reference database. In the present embodiment, the setting reference database includes a minimum design tightening pressure y (unit: [N / mm ²⁾ which is a pressure necessary for the gasket to be fitted to the flange seat, each of a plurality of types of gaskets, a gasket coefficient m, and a gasket. ), The minimum tightening surface pressure σ ₃ according to the type of the internal fluid (the surface pressure required to seal the internal fluid, the unit is [N / mm ² ]), and the gasket Is an allowable surface pressure p (unit: [N / mm ² ]), which is an allowable surface pressure. The minimum tightening surface pressure σ ₃ is set so that the value varies depending on the type of internal fluid.

  Although omitted in FIG. 4, for a specific type of gasket, at least one of the gasket coefficient m, the minimum design tightening pressure y, and the allowable surface pressure p may be different depending on the thickness. Good.

  FIG. 5 is a diagram illustrating an example of a recommended gasket database. As shown in FIG. 5, the recommended gasket database includes conditions for use of gaskets (in this case, internal fluid, temperature, and pressure) and recommended gaskets (or usable gaskets) at the time of use. Is associated with the type. In the usable conditions, for example, the type of internal fluid, the temperature range during use, and the pressure range during use are defined. Note that the recommended gasket type may be one or a plurality of types. When there are a plurality of types, priority levels recommended to the user may be set.

  Further, the database storage unit 30 may store a bolt database in which various types of information regarding each of a plurality of types of bolts are stored. The bolt database stores information related to bolts that tighten the gasket specified by the user. In the present embodiment, the bolt database includes the endurance stress of each of a plurality of types of bolts. The endurance stress is allowable stress for the bolt and can be said to be a limit stress for preventing the bolt from being broken. The endurance stress may be different for each user, or may be different depending on the type of gasket. For example, depending on the user, the endurance stress may be 50% of the stress at which the bolt is broken.

  The data stored in the database storage unit 30 is not limited to the above example. The database storage unit 30 may store data necessary for executing the tightening calculation of each gasket. For example, the data storage examples of the tightening calculation database, the setting reference database, and the recommended gasket database are not limited to the examples illustrated in FIGS.

[2-2. Gasket information acquisition unit, bolt information acquisition unit]
The gasket information acquisition unit 31 acquires the tightening calculation database, the setting reference database, and the recommended gasket database stored in the database storage unit 30. The bolt information acquisition unit 32 acquires information about bolts stored in a bolt database or a tightening calculation database.

[2-3. Reception department]
The accepting unit 33 accepts designation by the user of any of a plurality of types of gaskets, the size and pressure related to the gaskets, and the type of internal fluid. The accepting unit 33 accepts these designations from an input screen for inputting information related to the gasket to be subjected to tightening calculation.

  FIG. 6 is an example of an input screen displayed on the display unit 14. As shown in FIG. 6, in the input screen 60, a type designation form 61 for designating a gasket type, a pressure class designation form 62 for designating a pressure class related to the gasket, and a size related to the gasket are designated. Size designation form 63 and a fluid designation form 64 for designating the type of internal fluid.

  The user designates one of a plurality of types of gaskets on the type designation form 61. For example, the user inputs a product number for uniquely identifying the gasket in the type designation form 61. In addition, about the gasket in which several types of thickness exists, you may enable it to designate the kind and thickness of a gasket in the kind designation | designated form 61. FIG.

  The user designates one of a plurality of types of pressure classes on the pressure class designation form 62. For example, the user inputs a symbol string indicating the pressure class (flange diameter) defined in the standard into the pressure class designation form 62. The user designates one of a plurality of types of sizes on the size designation form 63. For example, the user inputs a symbol string indicating a size (nominal diameter) defined in the standard into the size designation form 63. The user designates one of a plurality of types of fluid (for example, any of water and oil systems and gas systems) in the fluid designation form 64.

  In the present embodiment, the accepting unit 33 accepts designation by the user regarding the usage conditions of the gasket designated by the user. For example, the input screen 60 displays a use temperature designation form 65, a use pressure designation form 66, and a use bolt designation form 67. The input to these forms is not indispensable for performing the tightening calculation, and is used to determine whether or not the gasket specified by the user can be used under these use conditions. The user inputs the temperature and pressure assumed when the gasket is used into the use temperature designation form 65 and the use pressure designation form 66, respectively. In addition, the user inputs information on the bolts when the gasket is used in the use bolt designation form 67.

  When the user selects the calculation button 68, gasket tightening calculation processing is executed based on the input conditions. Further, when input is made to the use temperature designation form 65, the use pressure designation form 66, and the use bolt designation form 67, a process for determining whether or not the gasket designated by the user is usable is executed.

  Each form may allow the user to directly input a symbol string, or by presenting input candidates such as the gasket type, pressure class, size, etc., and allowing the user to make a selection. Each information may be input.

[2-4. First tightening force calculation unit]
The first tightening force calculation unit 34 includes an effective width b and an effective diameter G corresponding to the size specified by the user, a pressure specified by the user (for example, an internal pressure P corresponding to the pressure class), and a specification specified by the user. Based on the gasket coefficient m of the gasket thus obtained, the first tightening force Wm ₁ of the gasket necessary for preventing the flange from being opened by the internal pressure P is calculated.

The effective width b is the width of the portion sealing the internal fluid among the portions where the gasket is in contact with the flange. The first tightening force calculation unit 34 calculates the effective width b (unit: [mm]) by the following calculation formula.
(Equation _{1-1) b 0 = w 1/} 2
(Formula 1-2) When b ₀ ≦ 6.35 [mm], b = b ₀
(Formula 1-3) When b ₀ > 6.35 [mm], b = 2.52√b ₀
w ₁ : Contact width of the gasket. The unit is [mm]. The contact width is “(gasket contact outer diameter−gasket inner diameter) / 2”. The gasket contact outer diameter is the smaller of the gasket outer diameter and the flange seat RF diameter.
b ₀ : Basic width of the gasket. The unit is [mm].

The effective diameter G is a diameter inside a portion of the gasket that seals the internal fluid. The first tightening force calculation unit 34 calculates an effective diameter G (unit: [mm]) by the following calculation formula.
(Formula 2-1) When b ₀ ≦ 6.35 [mm], G = w ₂
In the case of (Formula 2-2) b ₀ > 6.35 [mm], G = w ₃ -2b
w ₂ : Average diameter of the gasket contact surface. The unit is [mm].
w _3: gasket contact outside diameter. The unit is [mm].

Based on the calculated effective width b and effective diameter G, the first tightening force calculation unit 34 calculates the first tightening force Wm ₁ by the following calculation formula.
(Formula 3-1) H = πG ² P / 4
(Formula 3-2) Hp = 2πbGmP
(Formula 3-3) Wm ₁ = H + Hp = πGP (G + 8bm) / 4
P: Internal pressure H: Pressure to open the flange (end force). The unit is [N].
m: Gasket coefficient Hp: Pressure required to seal the internal fluid when the internal pressure is P. The unit is [N].

[2-5. Second tightening force calculation unit]
Based on the effective width b and effective diameter G, and the minimum design tightening pressure y of the gasket specified by the user, the second tightening force calculation unit 35 does not cause internal fluid permeation leakage or contact surface leakage. Therefore, the second tightening force Wm ₂ of the gasket necessary for this is calculated. Based on the calculated effective width b and effective diameter G, the second tightening force calculation unit 35 calculates the second tightening force Wm ₂ by the following formula.
(Formula 4) Wm ₂ = πbGy
y: Minimum design tightening pressure

[2-6. Third tightening force calculation unit]
The third tightening force calculation unit 36 corresponds to the gasket contact area Ag (unit: [mm ² ]) corresponding to the size specified by the user, and the type of gasket and internal fluid specified by the user. The third tightening force Wm ₃ is calculated by multiplying the minimum tightening surface pressure σ ₃ . Third clamping force Wm ₃ can be said clamping force in consideration of the use condition of the user. The third tightening force calculation unit 36 calculates the third tightening force Wm ₃ by the following calculation formula.
(Formula 5) Wm ₃ = σ ₃ Ag
σ ₃ : Minimum tightening surface pressure Ag: Gasket contact area. For example, π {(half of the gasket contact outer diameter) ² − (half of the gasket inner diameter) ² }

[2-7. Minimum tightening torque calculator]
The minimum tightening torque calculation unit 37 determines whether the internal torque is based on the maximum of the first tightening force Wm ₁ , the second tightening force Wm ₂ , and the third tightening force Wm ₃ and information on the bolt. The minimum tightening torque T _min of the bolt necessary for preventing fluid from leaking is calculated. Minimum tightening torque calculation unit 37, by the following calculation formula to calculate the torque T _min minimum fastening.
(Expression 6) T _min = KW _max D / 1000 n
K: Torque coefficient. In this embodiment, it is 0.20.
W _max : The largest of the first tightening force Wm ₁ , the second tightening force Wm ₂ , and the third tightening force Wm ₃ D: Bolt outer diameter n: Number of bolts

[2-8. Allowable tightening force calculation unit]
The allowable tightening force calculation unit 38 calculates the allowable tightening force Wm ₄ by multiplying the gasket contact area Ag by the allowable surface pressure p of the gasket specified by the user. Permissible clamping force calculation unit 38, by the following calculation formula to calculate the power Wm ₄ with acceptable tightening.
(Formula 7) Wm ₄ = pAg
p: allowable surface pressure Ag: gasket contact area

[2-9. Allowable tightening torque calculator]
The permissible tightening torque calculation unit 39 calculates a permissible tightening torque T _max for the bolt for preventing the specified gasket from being compressed and broken based on the permissible tightening force Wm ₄ and information on the bolt. The allowable tightening torque calculation unit 39 calculates the allowable tightening torque _Tmax by the following calculation formula.
(Expression 8) T _max = KWm ₄ D / 1000 n
K: Torque coefficient. In this embodiment, it is 0.20.
D: Bolt outer diameter n: Number of bolts

[2-10. Stress calculator]
Stress calculating section 40, based on the information about the torque T _min and bolt the minimum fastening to calculate the stress F _min according to the bolt when tightened the specified gasket torque T _min minimum fastening by the user. The stress calculation unit 40 calculates the stress _Fmin applied to the bolt by the following calculation formula.
(Equation 9) F _min = W _max / S
S: Bolt total valley cross-sectional area. That is, a value obtained by multiplying the bolt valley sectional area by the number n of bolts.

[2-11. Stress judgment part]
The stress determination unit 41 determines whether or not the stress F _min calculated by the stress calculation unit 40 exceeds the durability stress. For example, the stress determination unit 41 refers to a tightening calculation database and identifies the type of bolt that tightens the gasket specified by the user. Then, the stress determination unit 41 refers to the bolt database, and compares the endurance stress associated with the type of bolt with the stress _Fmin .

[2-12. Usability determination unit]
The usability determination unit 42 determines whether the use condition specified by the user satisfies the use condition associated with the gasket specified by the user. For example, the usability determination unit 42 refers to the recommended gasket database, and acquires the usable condition associated with the gasket specified by the user. Then, the usability determination unit 42 determines the usability of the gasket specified by the user by comparing the acquired usable condition with the use condition specified by the user.

  In the present embodiment, the availability determination unit 42 determines whether or not the fluid, temperature, and pressure specified by the user satisfy the usage conditions regarding the fluid, temperature, and pressure associated with the gasket specified by the user. To do. Further, the usability determination unit 42 refers to the tightening calculation database and determines whether or not the bolt type specified by the user is the bolt type associated with the gasket specified by the user.

[2-13. Presentation section]
The presentation unit 43 presents the minimum tightening torque T _min to the user in association with the gasket specified by the user. For example, displaying the information for identifying the gasket designated by the user and the minimum tightening torque T _min on the same screen corresponds to presenting them in association with each other. Thereafter, the same applies to the case where the same description is made. Note that the presentation in the present embodiment is not limited to presentation by image, but may be presentation by voice.

FIG. 7 is a diagram illustrating an example of a tightening calculation result screen displayed on the display unit 14. The calculation result clamping screen 70 as shown in FIG. 7, and specifies the content 71 by the user, the torque information 72 minimum fastening showing the torque T _min minimum fastening, is displayed.

In the present embodiment, the presentation unit 43 presents the user with the stress F _min calculated by the stress calculation unit 40 in association with the gasket specified by the user. As shown in FIG. 7, the tightening calculation result screen 70 displays stress information 73 indicating the stress F _min . Further, in the present embodiment, the presentation unit 43 presents the allowable tightening torque _Tmax to the user in association with the gasket designated by the user. As shown in FIG. 7, the tightening calculation result screen 70 displays allowable tightening torque information 74 indicating the allowable tightening torque _Tmax .

  In the present embodiment, the presentation unit 43 presents the determination result of the usability determination unit 42 to the user. As shown in FIG. 7, when the user inputs to the use temperature specification form 65, the use pressure specification form 66, and the use bolt specification form 67, use availability information 75 indicating whether or not the gasket specified by the user is used. Is displayed.

  In the present embodiment, the presentation unit 43 presents the determination result of the stress determination unit 41 to the user. For example, the presentation unit 43 presents an alert to the user when the stress determination unit 41 determines that the durability stress has been exceeded. The presentation unit 43 presents an alert by outputting a given image or a given sound.

FIG. 8 is a diagram illustrating an example of a tightening calculation result screen 70 on which an alert is displayed. As shown in FIG. 8, the tightening calculation result screen 70 displays alert information 76 indicating that the stress F _min calculated by the stress calculation unit 40 has exceeded the durability stress of the bolt. The alert information 76 may be, for example, a message indicating that other gaskets or bolts are encouraged.

[3. Processing executed in gasket tightening calculation system]
FIG. 9 is a flowchart showing processing executed by the gasket tightening calculation system. The process shown in FIG. 9 is executed when a gasket application activation instruction is given by the user. By executing the processing described below, the functional blocks shown in FIG. 2 are realized.

  First, as shown in FIG. 9, the control part 11 starts a gasket application, and displays the input screen 60 on the display part 14 (S1). When the control unit 11 displays the input screen 60 in S1, the control unit 11 waits for an input to each input form.

  The control unit 11 determines whether or not the user has input designated contents on each designated form (S2). When it determines with having input (S2; Y), the control part 11 reflects the content designated by a user on each form (S3). In S <b> 3, the control unit 11 inputs the content specified by the user to the focused form among the forms displayed on the input screen 60.

  The control unit 11 determines whether or not the user has selected the calculation button 68 (S4). When it is determined that the calculation button 68 has been selected (S4; Y), the control unit 11 determines whether or not the essential designation content has been input (S5). In S <b> 5, the control unit 11 determines whether or not the user has input designation contents for the type designation form 61, the pressure class designation form 62, the size designation form 63, and the fluid designation form 64.

  When it is determined that the essential designation content has not been input (S5; N), the control unit 11 displays an error message on the input screen 60 (S6), and returns to the process of S2. In this case, since there is not enough information to execute the gasket tightening calculation, the user is prompted to input the specified content.

  On the other hand, when it is determined that the essential designation content has been input (S5; Y), the control unit 11 determines whether or not to perform a process for determining whether or not the gasket specified by the user is to be used (S7). In S <b> 7, the control unit 11 determines whether or not the user has input designation contents for the use temperature designation form 65, the use pressure designation form 66, and the use bolt designation form 67.

  When it is determined to perform the usability determination process (S7; Y), the control unit 11 acquires data necessary for the tightening calculation and the usability determination process from the server device 20 (S8). In S <b> 8, the control unit 11 transmits the specified content and data acquisition request input to each form to the server device 20. In the server device 20, when receiving these, the control unit 21 refers to the tightening calculation database, the setting reference database, the recommended gasket database, and the bolt database, and transmits the requested data to the user device 10.

  The control unit 11 determines whether or not the gasket specified by the user can be used (S9). In S9, the control unit 11 determines whether or not the fluid, temperature, and pressure specified by the user satisfy the usable conditions associated with the gasket specified by the user. Further, the control unit 11 determines whether or not the bolt type specified by the user matches the bolt type associated with the gasket specified by the user.

  On the other hand, when it determines with not performing the usability determination process (S7; N), the control part 11 acquires the data required for tightening calculation from the server apparatus 20 (S10). In this case, since the use permission / inhibition determination process is not executed, the control unit 11 does not acquire the data stored in the recommended gasket database, and the processes of S8 and S9 are not executed.

The controller 11 calculates the first tightening force Wm ₁ , the second tightening force Wm ₂ , and the third tightening force Wm ₃ (S11). The calculation method in S11 is as described above. The controller 11 compares the first tightening force Wm ₁ , the second tightening force Wm ₂ , and the third tightening force Wm ₃ to identify the maximum tightening force W _max (S12). Control unit 11, based on the maximum tightening force _{W max} that the specified, to calculate the torque _{T min} and the stress _{F min} minimum fastening (S13). The calculation method in S13 is as described above.

The control unit 11 calculates the allowable tightening force Wm ₄ and the allowable tightening torque T _max based on the data received from the server device 20 (S14). The calculation method in S14 is as described above. The control unit 11 determines whether or not the stress _Fmin exceeds the durability stress of the bolt (S15). When it is determined that the stress F _min has exceeded the durability stress of the bolt (S15; Y), the control unit 11 causes the display unit 14 to display a tightening calculation result screen 70 including the alert information 76 (S16). When the processes of S8 and S9 are executed, the control unit 11 displays the availability information 75 on the tightening calculation result screen 70 in S16.

On the other hand, when it is determined that the stress F _min does not exceed the durability stress of the bolt (S15; N), the control unit 11 causes the display unit 14 to display the tightening calculation result screen 70 that does not include the alert information 76 ( S17). When the processes of S8 and S9 are executed, the control unit 11 displays the availability information 75 on the tightening calculation result screen 70 in S17.

  The control unit 11 determines whether or not the end condition is satisfied (S18). The end condition may be a condition that is set in advance to end the process. For example, it is whether or not the gasket application end instruction operation has been performed by the user. When it is determined that the end condition is satisfied (S18; Y), this process ends. If it is not determined that the end condition is satisfied (S18; N), the process returns to S2, and the tightening calculation is executed based on another input content.

According to the gasket tightening calculation system 1 described above, the minimum tightening torque T _min is calculated in consideration of the first tightening force Wm ₁ , the second tightening force Wm ₂ , and the third tightening force Wm _3. As a result, an accurate tightening torque can be presented to the user, and the burden on the user when considering the tightening torque can be reduced. In particular, since it is the customer, not the manufacturer, who actually tightens the gasket, it is easier for the customer who actually tightens the gasket to consider the tightening torque by using the gasket tightening calculation system 1. .

Further, by presenting the allowable tightening torque _Tmax , the user can be made aware of the tightening torque for preventing the gasket from being compressed and broken. Furthermore, by presenting the stress _Fmin , the user can easily grasp the possibility of breaking the bolt. Further, when the stress _Fmin exceeds the durability stress of the bolt, the alert information 76 is presented so that the user can be more effectively grasped that the bolt may be destroyed. Furthermore, by displaying the usability information 75, it is possible to reduce the burden on the user when selecting a gasket.

[4. Modified example]
The present invention is not limited to the embodiment described above. Modifications can be made as appropriate without departing from the spirit of the present invention.

  FIG. 10 is a functional block diagram of a modified example. As shown in FIG. 10, in the modification described below, in addition to the functions of the embodiment, a bolt search unit 44, a gasket search unit 45, a bolt allowable tightening torque calculation unit 46, an order processing execution unit 47, an order processing restriction The unit 48, the presentation restriction unit 49, and the recording unit 50 are realized. For example, the bolt search unit 44, the gasket search unit 45, the order processing execution unit 47, and the recording unit 50 are realized mainly by the control unit 21, and the order processing restriction unit 48 and the presentation restriction unit 49 are realized mainly by the control unit 11. Is done.

(1) For example, in the embodiment, the alert information 76 is displayed when the stress F _min exceeds the endurance stress of the bolt. In this case, another bolt whose endurance stress is greater than the stress F _min is displayed by the user. You may make it propose to.

For example, the reception unit 33 may receive a user's designation of a bolt that tightens a gasket designated by the user among a plurality of types of bolts. In this case, a form for the user to specify a bolt is displayed on the input screen 60, and the accepting unit 33 accepts an input to the form. For example, the user designates the type, number, and size of bolts. The bolt information acquisition unit 32 acquires information about the bolt specified by the user. Further, the minimum tightening torque calculation unit 37 calculates the minimum tightening torque T _min based on the type of bolt specified by the user. Calculation method itself of the torque T _min minimum fastening is similar to the method described in the embodiment.

The gasket tightening calculation system 1 of the modification (1) includes a bolt search unit 44. The bolt search unit 44 searches for bolts having a durability stress greater than the stress F _min calculated by the stress calculation unit 40 among the plurality of types of bolts. The bolt search unit 44 searches for bolts having a durability stress greater than the stress _Fmin among the bolts stored in the bolt database.

For example, the bolt search unit 44 searches for a bolt having a durability stress greater than the stress F _min from other bolts corresponding to the bolt specified by the user. Other corresponding bolts are bolts of the same type or similar to the bolts specified by the user, and the same size or similar to the bolts of the size specified by the user (the deviation from the size specified by the user is the standard) Bolts within the size). In this case, it is assumed that associations between similar types of bolts are defined in the bolt database.

For example, the stress determination unit 41 determines whether or not the stress F _min calculated by the stress calculation unit 40 exceeds the durability stress of the bolt specified by the user. That is, the stress determination unit 41 refers to the bolt database, acquires the endurance stress associated with the bolt specified by the user, and executes the determination process. When it is determined that the stress F _min calculated by the stress calculation unit 40 exceeds the endurance stress of the bolt specified by the user, the presentation unit 43 presents another bolt searched by the bolt search unit 44 to the user. To do.

  FIG. 11 is a diagram showing an example of the tightening calculation result screen 70 in the modification (1). As shown in FIG. 11, the presentation unit 43 displays bolt information 77 for identifying other bolts searched by the bolt search unit 44 on the tightening calculation result screen 70.

  According to the modification (1), when there is a possibility that the bolt is damaged, a more optimal bolt can be proposed to the user. By viewing the bolt information 77, the user can select a gasket while considering the use of other bolts.

(2) Further, for example, when the stress F _min exceeds endurance stress of the bolt, of the user's use condition is satisfied gasket, other gaskets, such as stress F _min does not exceed the endurance stress of the bolt to the user You may make it suggest.

The gasket tightening calculation system 1 of the modification (2) includes a gasket search unit 45. The gasket search unit 45 searches for a gasket whose stress F _min calculated by the stress calculation unit 40 does not exceed the endurance stress from a plurality of types of gaskets. Specifically, the gasket search unit 45 first determines the design value (for example, for example) that the gasket should satisfy so that the stress _Fmin does not exceed the durability stress based on the size, pressure, and fluid type specified by the user. The gasket coefficient m, the minimum design tightening pressure y, the minimum tightening surface pressure σ ₃ , and the allowable surface pressure p) are specified by back calculation. That is, in normal tightening calculation, these design values are used as coefficients, but here they are used as factors. And the gasket search part 45 extracts the gasket which satisfy | fills these design values with reference to a setting reference | standard database.

The gasket search method is not limited to this. For example, the gasket search unit 45 once calculates the stress F _min corresponding to each of the other gaskets based on the size, pressure, and fluid type specified by the user, and the stress F _min does not exceed the endurance stress. You may make it extract a gasket. In addition, for example, when the user specifies the use condition, the gasket search unit 45 refers to the recommended gasket database, and selects the size, pressure, and You may make it extract that the stress _Fmin computed based on the kind of fluid does not exceed endurance stress.

When it is determined that the stress F _min calculated by the stress calculation unit 40 exceeds the endurance stress, the presentation unit 43 presents another gasket searched by the gasket search unit 45 to the user. FIG. 12 is a diagram illustrating an example of the tightening calculation result screen 70 in the modification (2). As shown in FIG. 12, the presentation unit 43 displays gasket information 78 for identifying other gaskets searched by the gasket search unit 45 on the tightening calculation result screen 70. The gasket information 78 may include a message that prompts the user to confirm whether or not the presented gasket really meets the usage conditions.

  According to the modification (2), when there is a possibility that the bolt may be damaged, the user can assist the user in selecting a gasket by proposing another gasket to the user.

  (3) Further, for example, a tightening torque determined based on the durability stress of the bolt may be presented to the user.

The gasket tightening calculation system 1 of the modification (3) includes a bolt allowable tightening torque calculation unit 46. Bolt permissible tightening torque calculation unit 46, based on the endurance stress of the bolt tightening a specified gasket by the user, calculates a tightening torque T ₅ allowed for the bolt.
(Expression 10) W ₅ = F _max S
(Formula _{11) T 5 = KW 5 D} / 1000n
_Fmax : endurance stress S: total bolt cross section K: torque coefficient D: bolt outer diameter n: number of bolts

Presentation unit 43, in association with a gasket designated by the user, presenting the tightening torque T ₅ is allowed to bolt the user. FIG. 13 is a diagram showing an example of the tightening calculation result screen 70 in the modification (3). As shown in FIG. 13, the presentation unit 43 displays torque information 79 indicating the tightening torque T ₅ allowed for the bolt on the tightening calculation result screen 70. For example, a message that prompts the bolt to be tightened with the tightening torque from the minimum tightening torque T _min indicated by the minimum tightening torque information 72 to the tightening torque T ₅ indicated by the torque information 79 may be displayed. .

According to a variant (3), the tightening torque T ₅ allowed the bolt allows the user to grasp. That is, since the user can grasp the minimum tightening torque T _min for preventing the internal fluid from leaking and the tightening torque T ₅ for preventing the bolt from being damaged, the burden on the user can be reduced more effectively. it can.

  (4) For example, when the tightening calculation of the gasket designated by the user is executed, the user may be able to order the gasket. In the modified example (4), for simplification of explanation, a case where the ordering of gaskets is managed by the server device 20 will be described, but it may be managed by another server.

  For example, the database storage unit 30 stores an ordering / ordering database relating to ordering of gaskets. For example, each ordering database is associated with each of a plurality of gaskets and the inventory and delivery time of the gaskets. Note that the data stored in the ordering database is not limited to this. In addition, for example, the price of each gasket, personal information about the user, and the like may be stored in the ordering database.

Reception unit 33, when the torque T _min minimum fastening by the presentation unit 43 is presented, accepting orders operation gaskets designated by the user. FIG. 14 is a diagram illustrating an example of the tightening calculation result screen 70 in the modification (4). As shown in FIG. 14, the tightening calculation result screen 70 displays an order button 80 for ordering a gasket designated by the user. When the user selects the order button 80, a request for ordering a gasket designated by the user is transmitted from the user device 10 to the server device 20.

  The gasket tightening calculation system 1 of the modified example (4) includes an order processing execution unit 47. When receiving an ordering operation by the user, the ordering process execution unit 47 executes an ordering process for the gasket designated by the user. For example, when receiving a request for ordering a gasket, the order processing execution unit 47 executes a gasket ordering process designated by the user. The ordering process is a process for delivering a gasket to the user, and various known processes can be applied to the process itself. For example, the order processing execution unit 47 updates the order receiving / ordering database and outputs information (for example, a shipping slip) for the gasket manufacturer to deliver the gasket to the user.

  According to the modification (4), when the tightening calculation of the gasket specified by the user is executed, the ordering process for the gasket can be executed, so that the user can be satisfied with the result of the tightening calculation. It is possible to place an order for the gasket as it is.

(5) For example, if the stress _Fmin exceeds the endurance stress, the bolt may be damaged. In this case, the user may not be able to order a gasket. The gasket tightening calculation system 1 of the modified example (5) includes an order processing restriction unit 48. The ordering process restriction unit 48 restricts the execution of the ordering process by the ordering process execution unit 47 when the stress determination unit 41 determines that the durability stress has been exceeded.

  Here, the order button 80 is not displayed, the selection of the order button 80 is disabled, and even if the user selects the order button 80, the order process execution unit 47 does not execute the order process (for example, an order request is issued). This is equivalent to restricting the execution of the ordering process. According to the modified example (5), it is possible not to place an order for a gasket that may damage the bolt, so that only a safer gasket can be delivered to the user.

(6) For example, when a user orders a gasket, the minimum tightening torque _Tmin may be printed on a shipping slip of the gasket. When the gasket ordering process designated by the user is executed, the ordering process execution unit 47 prints the minimum tightening torque _Tmin on an attached sheet (for example, a shipping slip) when the gasket is shipped.

For example, the server device 20, is connected to a printer for printing a delivery, order processing execution unit 47, a delivery comprising a torque T _min minimum fastening to print to the printer. The shipping slip is delivered to the user together with the gasket ordered by the user. According to the modification (6), since the bolt tightening torque can be grasped when the user receives the gasket, an accident due to insufficient tightening can be surely prevented.

  (7) For example, when the tightening calculation of the gasket specified by the user is executed, the inventory amount and delivery date of the gasket may be presented. Here, it is assumed that information on the inventory amount and delivery date of each of a plurality of types of gaskets is stored in the ordering database.

When the presenting unit 43 presents the minimum tightening torque _Tmin to the user, the presenting unit 43 presents the user with information related to the inventory amount and delivery date of the gasket designated by the user. For example, the presentation unit 43 acquires an inventory amount and a delivery date associated with the gasket specified by the user, and displays information indicating the acquired inventory amount and delivery date on the tightening calculation result screen 70. According to the modification (7), it is possible to make the user place an order for the gasket after confirming the inventory amount and delivery date of the gasket for which the tightening calculation has been performed.

(8) For example, when the stress _Fmin exceeds the endurance stress, the inventory amount and delivery date of the gasket may not be confirmed. The gasket tightening calculation system 1 according to the modification (8) includes a presentation restriction unit 49. The presentation restriction unit 49 restricts presentation of information related to the inventory amount and delivery date of the gasket designated by the user when the stress determination unit 41 determines that the durability stress has been exceeded.

When it is determined by the stress determination unit 41 that the endurance stress has been exceeded, the presentation restriction unit 49 does not present information on the inventory amount and the delivery date, and when the stress determination unit 41 determines that the endurance stress has not been exceeded Provides information on inventory and delivery times. According to the modified example (8), when the stress _Fmin exceeds the endurance stress, it is possible to prevent the gasket from being ordered that may cause the bolt to be damaged by making it impossible to confirm the inventory amount and delivery date of the gasket. be able to.

  (9) Further, for example, the contents of the ordering / ordering database may be updated in real time by ordering by each user. The order processing execution unit 47 updates information on the inventory amount and delivery date of each of the plurality of gaskets in accordance with the gasket ordering process designated by the user.

  For example, the order processing execution unit 47 decreases the inventory amount of the gasket ordered by the user by the order amount specified by the user. Further, for example, when the stock amount of each gasket falls below a threshold value, the order processing execution unit 47 updates the delivery date of the gasket. The delivery date may be updated by a predetermined method. For example, the delivery date is updated on a date designated by the gasket manufacturer. According to the modification (9), the inventory amount and delivery date of the gasket can be updated in real time.

  (10) Further, for example, when a user orders a gasket, a device using the gasket may be designated so that past order contents can be used in the next and subsequent orders. The accepting unit 33 accepts designation by the user for a device that uses the gasket designated by the user. The reception part 33 acquires the identification information of the apparatus which uses a gasket. For example, a symbol string indicating a device that uses a gasket may be input by the user, or a device used by the user may be selected from a plurality of types of devices.

  The gasket tightening calculation system 1 of the modification (10) includes a recording unit 50. When the order processing by the order processing execution unit 47 is executed, the recording unit 50 records order information related to the gasket ordered by the user in association with the device designated by the user. For example, the database storage unit 30 stores an order information database in which order information for each user is stored. In the order information database, the user who ordered the gasket, the device designated by the user, and the order information are associated with each other. The order information includes, for example, the contents designated by the user from the input screen 60, the number of gaskets ordered, and the order time. In the case of an individual dimension product, the ordering information may include a drawing related to the gasket of the individual dimension product.

  When the device is designated by the user after the ordering information is recorded, the presenting unit 43 presents the ordering information associated with the designated device to the user. The user performs an ordering operation based on the presented ordering information. The order processing execution unit 47 executes order processing based on the order information presented to the user.

  According to the modified example (10), the gasket used for the device can be associated with each device specified by the user, so the burden on the user when ordering the gasket can be reduced. For example, gaskets used in equipment such as heat exchangers are often ordered based on drawings in an individual design, so by recording ordering information, the user designates the equipment at the next order. Since the gasket can be ordered simply by doing, the burden on the user at the time of ordering can be effectively reduced.

  (11) For example, tightening calculation may be performed on the gaskets ordered by the user in the past without inputting from the input screen 60. Here, the ordering information includes information on the type of gasket designated by the user at the time of past ordering, the size and pressure related to the gasket, and the type of internal fluid. That is, the ordering information of the modified example (11) includes contents input from the input screen 60 by the user.

Each of the first tightening force calculation unit 34, the second tightening force calculation unit 35, and the third tightening calculation unit 36 is based on the ordering information at the time of the previous ordering, the first tightening force Wm ₁ , Each of the 2 tightening force Wm ₂ and the third tightening force Wm ₃ is calculated. These calculation methods are the same as those described in the embodiment. According to the modification (11), it is possible to more effectively reduce the burden on the user when performing the gasket tightening calculation.

  (12) Further, for example, the embodiment and two or more of the modified examples may be combined.

For example, in the above description, the tightening calculation related to the standard product has been described as an example. In the case of an individual dimension product, the value and the pressure input by the user are used for the size and pressure related to the gasket, instead of the values stored in the tightening calculation database. The first tightening force calculation unit 34, the second tightening force calculation unit 35, and the third tightening force calculation unit 36 are based on the values input by the user, the first tightening force Wm ₁ , the second tightening force A force Wm ₂ and a third tightening force Wm ₃ are calculated. Similarly, in the case of an individual dimension product, the user is also required to input information regarding the bolt. The minimum tightening torque calculation unit 37 calculates the minimum tightening torque T _min based on the information regarding the bolt input by the user. In this way, tightening calculation can be executed even if the gasket dimensions and shape are not standard products.

Further, for example, in the embodiment, the case where the minimum tightening torque T _min , the allowable tightening torque T _max , and the stress F _min are presented to the user has been described. However, items that are not presented according to the type of gasket specified by the user There may be. For example, in the case of a metal gasket, the allowable tightening torque _Tmax may not be presented. Further, for example, information other than the minimum tightening torque T _min , the allowable tightening torque T _max , and the stress F _min may be presented to the user. For example, the minimum tightening surface pressure σ ₃ may be presented to the user.

  For example, the data storage example of the database used for gasket tightening calculation is not limited to the above example. For example, in the above description, the case where the bolt valley cross-sectional area is stored in the database has been described. However, only the information on the outer diameter of the bolt is stored in the database, and the bolt total cross-sectional area may be obtained by calculation. .

  Further, for example, the gasket tightening calculation system 1 may be a system realized by a single computer. For example, the database storage unit 30 may be realized in the user device 10. In this case, the gasket tightening calculation system 1 is realized only by the user device 10. In addition, each process described in the function block may be realized by the server device 20 instead of the user device 10. In this case, in the user device 10, only user input reception and screen display are performed, and processing related to tightening calculation is executed in the server device 20. In addition, for example, each process described in the functional block may be shared by the user device 10 and the server device 20.

DESCRIPTION OF SYMBOLS 1 Gasket tightening calculation system, 10 User apparatus, 11 Control part, 12 Storage part, 13 Operation part, 14 Display part, 15 Communication part, 20 Server apparatus, 21 Control part, 22 Storage part, 23 Communication part, 30 Database storage 31, gasket information acquisition unit, 32 bolt information acquisition unit, 33 reception unit, 34 first tightening force calculation unit, 35 second tightening force calculation unit, 36 third tightening force calculation unit, 37 minimum tightening torque Calculation section, 38 Allowable tightening force calculation section, 39 Allowable tightening torque calculation section, 40 Stress calculation section, 41 Stress determination section, 42 Usability determination section, 43 Presentation section, 44 Bolt search section, 45 Gasket search section, 46 Bolt allowable tightening torque calculation section, 47 order processing execution section, 48 order processing restriction section, 49 presentation restriction section, 50 recording section, 60 input screen, 61 type designation form, 62 pressure class designation field 63, size specification form, 64 fluid specification form, 65 operating temperature specification form, 66 operating pressure specification form, 67 operating bolt specification form, 68 calculation button, 70 tightening calculation result screen, 71 specified content, 72 minimum tightening Torque information, 73 Stress information, 74 Allowable tightening torque information, 75 Usability information, 76 Alert information, 77 Bolt information, 78 Gasket information, 79 Torque information, 80 Order button, m Gasket coefficient, P Internal pressure, n number, D outer diameter, y minimum design tightening pressure, σ ₃ minimum tightening surface pressure, p allowable surface pressure, b effective width, G effective diameter, b ₀ basic width, Wm ₁ first tightening force, Wm ₂ second tightening Adhesive force, Wm ₃ third tightening force, Ag gasket contact area, T _min minimum tightening torque, Wm ₄ allowable tightening force, T _max allowable tightening torque, F _min stress.

Claims (15)

Storage means for storing a database in which each of a plurality of types of gaskets is associated with a gasket coefficient, a minimum design tightening pressure, and a minimum tightening surface pressure according to the type of internal fluid;
Accepting means for accepting designation by the user of any of the plurality of types of gaskets, the size and pressure related to the gaskets, and the type of internal fluid;
Based on the effective width and effective diameter corresponding to the specified size, the specified pressure, and the gasket coefficient of the specified gasket, the first gasket required to prevent the flange from being opened by internal pressure. A first tightening force calculating means for calculating a tightening force;
Based on the effective width and the effective diameter, and the minimum design tightening pressure of the designated gasket, the second tightening force of the gasket necessary to prevent internal fluid seepage leakage or contact surface leakage. A second tightening force calculating means for calculating;
A third tightening force that calculates a third tightening force by multiplying the gasket contact area corresponding to the specified size by the minimum tightening surface pressure corresponding to the specified gasket and the type of internal fluid. A calculation means;
Obtaining means for obtaining information about a bolt for tightening the designated gasket;
Based on the maximum of the first tightening force, the second tightening force, and the third tightening force and the information on the bolt, the minimum bolt required to prevent internal fluid from leaking. A minimum tightening torque calculating means for calculating a tightening torque;
Presenting means for presenting the minimum tightening torque to the user in association with the designated gasket;
A gasket tightening calculation system including
The accepting means accepts an ordering operation by the user for the designated gasket when the presenting means presents the minimum tightening torque, and further, for the device using the designated gasket, by the user. Accept the specification,
The gasket tightening calculation system is:
When receiving an ordering operation by the user, ordering process execution means for executing the ordering process of the designated gasket;
When ordering processing by the ordering processing unit is executed, it is ordering information related to the gasket ordered by the user in association with the designated device, and the type of gasket designated by the user at the time of past ordering And means for recording ordering information including information regarding the size and pressure associated with the gasket and the type of internal fluid;
Further including
When the device is designated by the user after the order information is recorded, the presenting means presents the order information associated with the designated device to the user,
Each of the first tightening force calculating means, the second tightening force calculating means, and the third tightening calculating means is based on the order information at the time of past ordering, the first tightening force, Calculating each of the second tightening force and the third tightening force;
Gasket tightening calculation system characterized by that. In the database, each of the plurality of types of gaskets is associated with an allowable surface pressure,
The gasket tightening calculation system is:
Means for multiplying the gasket contact area by an allowable surface pressure of the designated gasket to calculate an allowable tightening force;
Means for calculating an allowable tightening torque of the bolt for preventing the specified gasket from being compressed and broken based on the allowable tightening force and the information on the bolt;
Further including
The presenting means presents the allowable tightening torque to the user in association with the designated gasket;
The gasket tightening calculation system according to claim 1. The gasket tightening calculation system is:
Stress calculating means for calculating a stress applied to the bolt when the specified gasket is tightened at the minimum tightening torque based on the minimum tightening torque and the information on the bolt;
The presenting means presents the calculated stress to the user in association with the designated gasket.
The gasket tightening calculation system according to claim 1 or 2, characterized in that The information on the bolt includes information on the durability stress of the bolt,
The gasket tightening calculation system is:
A stress determination means for determining whether the calculated stress exceeds the endurance stress;
The presenting means presents the determination result of the stress determining means to the user;
The gasket tightening calculation system according to claim 3. The information on the bolt includes information on each endurance stress of the plurality of types of bolts,
The gasket tightening calculation system is:
Means for searching for a bolt having the durability stress greater than the calculated stress among the plurality of types of bolts;
The presenting means presents the retrieved other bolt to the user when it is determined that the calculated stress exceeds the endurance stress.
The gasket tightening calculation system according to claim 4. The gasket tightening calculation system is:
A means for searching for a gasket whose stress calculated by the stress calculation means does not exceed the endurance stress from the plurality of types of gaskets;
The presenting means presents the retrieved other gasket to the user when it is determined that the calculated stress exceeds the endurance stress.
The gasket tightening calculation system according to claim 4 or 5, characterized in that Each of the plurality of types of gaskets is associated with usable conditions in the database,
The accepting means accepts designation by the user for use conditions of the designated gasket,
The gasket tightening calculation system is:
A usability judging unit for judging whether or not the designated use condition satisfies a usable condition associated with the designated gasket;
The presenting means presents the determination result of the usability determining means to the user;
The gasket tightening calculation system according to any one of claims 1 to 6, wherein: The information on the bolt includes information on the durability stress of the bolt,
The gasket tightening calculation system is:
Means for calculating a tightening torque allowed for the bolt based on the durability stress;
The presenting means presents the tightening torque allowed for the bolt to the user in association with the designated gasket;
The gasket tightening calculation system according to any one of claims 1 to 7, characterized in that The accepting means accepts designation by the user of information about the bolt when using the gasket,
The information on the bolt includes information on the durability stress of the bolt,
The gasket tightening calculation system is:
Stress calculating means for calculating a stress applied to the specified bolt when the specified gasket is tightened with the minimum tightening torque based on the minimum tightening torque and the information on the bolt;
Stress determination means for determining whether or not the calculated stress exceeds the durability stress;
Means for restricting execution of the ordering process by the ordering process execution means when it is determined by the stress determination means that the durability stress has been exceeded;
The gasket tightening calculation system according to any one of claims 1 to 8 , further comprising: The order processing execution means prints the minimum tightening torque on an attached sheet when the gasket is shipped, when executing the order processing of the designated gasket.
The gasket tightening calculation system according to any one of claims 1 to 9 . The gasket tightening calculation system is:
Means for storing information on the inventory amount and delivery date of each of the plurality of types of gaskets;
The presenting means, when presenting the minimum tightening torque to the user, presents the information regarding the inventory amount and delivery date of the designated gasket to the user.
The gasket tightening calculation system according to any one of claims 1 to 10 , wherein the gasket tightening calculation system according to any one of claims 1 to 10 is provided. The accepting means accepts designation by the user of information about the bolt when using the gasket,
The information on the bolt includes information on the durability stress of the bolt,
The gasket tightening calculation system is:
Stress calculating means for calculating a stress applied to the specified bolt when the specified gasket is tightened with the minimum tightening torque based on the minimum tightening torque and the information on the bolt;
Stress determination means for determining whether or not the calculated stress exceeds the durability stress;
Means for restricting the information regarding the inventory amount and delivery date of the designated gasket from being presented when it is determined by the stress determination means that the durability stress has been exceeded;
Furthermore gasket computing system fastening according to claim 1 1, characterized in that it comprises a. The order processing means updates information on the inventory amount and delivery date of each of the plurality of gaskets according to the order processing of the designated gasket.
Claim 1 1 or 1 2 computing system gasketed tightening according to, characterized in that. Acquiring storage contents of a storage means for storing a database in which each of a plurality of types of gaskets is associated with a gasket coefficient, a minimum design tightening pressure, and a minimum tightening surface pressure according to the type of internal fluid;
A reception step of accepting designation by the user of any of the plurality of types of gaskets, the size and pressure related to the gaskets, and the type of internal fluid;
Based on the effective width and effective diameter corresponding to the specified size, the specified pressure, and the gasket coefficient of the specified gasket, the first gasket required to prevent the flange from being opened by internal pressure. A first tightening force calculating step for calculating a tightening force;
Based on the effective width and the effective diameter, and the minimum design tightening pressure of the designated gasket, the second tightening force of the gasket necessary to prevent internal fluid seepage leakage or contact surface leakage. A second tightening force calculating step for calculating;
A third tightening force that calculates a third tightening force by multiplying the gasket contact area corresponding to the specified size by the minimum tightening surface pressure corresponding to the specified gasket and the type of internal fluid. A calculation step;
An obtaining step for obtaining information about a bolt for tightening the designated gasket;
Based on the maximum of the first tightening force, the second tightening force, and the third tightening force and the information on the bolt, the minimum bolt required to prevent internal fluid from leaking. A minimum tightening torque calculating step for calculating a tightening torque;
A presenting step of presenting the minimum tightening torque to the user in association with the designated gasket;
The A control method of a computing system with including a gasket tightening,
The accepting step accepts an ordering operation by the user of the designated gasket when the minimum tightening torque is presented by the presenting step, and further, for the device using the designated gasket, by the user. Accept the specification,
The control method of the gasket tightening calculation system is:
When receiving an ordering operation by the user, an ordering process execution step for executing the ordering process of the designated gasket;
When ordering processing by the ordering processing step is executed, it is ordering information related to the gasket ordered by the user in association with the designated device, and the type of gasket designated by the user at the time of past ordering Recording ordering information including information regarding the size and pressure associated with the gasket and the type of internal fluid;
Further including
In the presenting step, when a device is designated by the user after the ordering information is recorded, the ordering information associated with the designated device is presented to the user,
Each of the first tightening force calculating step, the second tightening force calculating step, and the third tightening calculating step is based on the ordering information at the time of past ordering, the first tightening force, Calculating each of the second tightening force and the third tightening force;
A control method of a gasket tightening calculation system characterized by the above. Means for acquiring storage contents of a storage means for storing a database in which each of a plurality of types of gaskets is associated with a gasket coefficient, a minimum design tightening pressure, and a minimum tightening surface pressure according to the type of internal fluid;
Accepting means for accepting designation by the user of any of the plurality of types of gaskets, the size and pressure related to the gaskets, and the type of internal fluid;
Based on the effective width and effective diameter corresponding to the specified size, the specified pressure, and the gasket coefficient of the specified gasket, the first gasket required to prevent the flange from being opened by internal pressure. A first tightening force calculating means for calculating a tightening force;
Based on the effective width and the effective diameter, and the minimum design tightening pressure of the designated gasket, the second tightening force of the gasket necessary to prevent internal fluid seepage leakage or contact surface leakage. A second tightening force calculating means for calculating;
A third tightening force that calculates a third tightening force by multiplying the gasket contact area corresponding to the specified size by the minimum tightening surface pressure corresponding to the specified gasket and the type of internal fluid. Calculation means,
Obtaining means for obtaining information about a bolt for tightening the designated gasket;
Based on the maximum of the first tightening force, the second tightening force, and the third tightening force and the information on the bolt, the minimum bolt required to prevent internal fluid from leaking. Minimum tightening torque calculating means for calculating the tightening torque;
Presenting means for presenting the minimum tightening torque to the user in association with the designated gasket;
A program for causing a computer to function as,
The accepting means accepts an ordering operation by the user for the designated gasket when the presenting means presents the minimum tightening torque, and further, for the device using the designated gasket, by the user. Accept the specification,
The computer,
When receiving an ordering operation by the user, an ordering process executing means for executing an ordering process of the designated gasket;
When ordering processing is performed by the ordering processing means, the ordering information regarding the gasket ordered by the user in association with the designated device, the type of gasket designated by the user at the time of past ordering and Means for recording ordering information including information about the size and pressure of the gasket and the type of internal fluid;
Further function as
When the device is designated by the user after the order information is recorded, the presenting means presents the order information associated with the designated device to the user,
Each of the first tightening force calculating means, the second tightening force calculating means, and the third tightening calculating means is based on the order information at the time of past ordering, the first tightening force, Calculating each of the second tightening force and the third tightening force;
A program characterized by that.

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