Fastening torque determination method and device, electronic equipment, storage medium and product

Abstract

The invention relates to a fastening torque determination method and device, electronic equipment, a storage medium and a product. The method comprises the following steps: acquiring fastening system information of a to-be-set fastening torque; performing application scene identification on the fastening system information to obtain an application scene label, and judging whether a target application scene matched with the application scene label exists in a preset fastening torque database or not; if the target application scene matched with the application scene label exists, the fastening torque corresponding to the target application scene serves as the initial fastening torque, rack testing is conducted on the initial fastening torque, and the final fastening torque is determined according to the testing result. Therefore, by labeling the fastening system information and matching the corresponding fastening torque based on the fastening torque database, the accuracy and reliability of calculation are improved, the workload of calculating the fastening torque in the whole vehicle design process is greatly reduced, the design period is shortened, and the production efficiency is improved by reducing the redundancy of vehicle torque types and the number of production line tools. The cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle assembly, and in particular to a method, device, electronic equipment, storage medium and product for determining a tightening torque. Background Art

[0002] In the design process of automobile complete vehicles and structural assemblies, connections are mainly made through fasteners. According to statistics of general narrow passenger cars, a complete vehicle involves about 2,000 to 3,000 connection points that need to be tightened by applying torque.

[0003] In the related art, engineers usually determine coefficients based on experience and select different calculation formulas to calculate the tightening torque according to applicable scenarios.

[0004] However, the above scheme relies too much on the experience and choices of engineers themselves. Even for the same application scenario, the calculation results are not exactly the same. This not only leads to uneven reliability of the fasteners in the connection design, but also a high risk of quality problems in the later stage. In addition, there are too many connection points in the whole vehicle, and the calculation of the tightening torque is too large, which needs to be solved urgently. Summary of the invention

[0005] The present invention provides a method, device, electronic device, storage medium and product for determining tightening torque to solve the problems in related technologies that over-reliance on engineer experience leads to insufficient objectivity and reliability of results and excessively large amount of calculation of tightening torque, thereby improving the accuracy and reliability of calculation, greatly reducing the workload of calculating tightening torque during vehicle design, shortening the design cycle, and reducing the redundancy of vehicle torque types, reducing the number of production line tool types, and reducing costs.

[0006] To achieve the above object, a first embodiment of the present invention provides a method for determining a tightening torque, comprising the following steps:

[0007] Acquire fastening system information for which a fastening torque is to be set;

[0008] Performing application scenario identification on the fastening system information to obtain an application scenario label, and determining whether there is a target application scenario matching the application scenario label in a preset fastening torque database;

[0009] If there is a target application scenario that matches the application scenario label, the tightening torque corresponding to the target application scenario is used as the initial tightening torque, and a bench test is performed on the initial tightening torque, and the final tightening torque is determined according to the test result.

[0010] According to one embodiment of the present invention, after determining whether there is a target application scenario matching the application scenario label in the preset tightening torque database, the method further includes:

[0011] If the preset tightening torque database does not contain a target application scenario matching the application scenario label, determining a maximum tightening torque and a minimum tightening torque based on the application scenario label;

[0012] A tightening torque interval range is determined according to the maximum tightening torque and the minimum tightening torque, and based on the tightening torque interval range, the final tightening torque is determined according to valid sequence data in other scenarios of the preset tightening torque database.

[0013] According to an embodiment of the present invention, before determining whether there is a target application scenario matching the application scenario label in the preset tightening torque database, the method further includes:

[0014] Acquire at least one attribute information of multiple target fasteners, wherein the attribute information includes connection attributes, specifications and pitch of fasteners, strength performance, fastener part number, part name, vehicle model, professional field of the assembly to which it belongs, fastening use position, application quantity, material properties of the fastener, installation hole size, strength information of hand threaded parts, bench test records, vehicle durability records, and measured parameters of historical tests;

[0015] For each target fastener, each attribute information of each target fastener is subjected to scene labeling processing, and the preset tightening torque database is generated according to the scene labeling processing result.

[0016] According to an embodiment of the present invention, the application scenario tag includes a primary scenario tag and a secondary scenario tag, and the step of determining whether there is a target application scenario matching the application scenario tag in a preset tightening torque database includes:

[0017] Filtering out a first application scenario set that is completely consistent with the main scenario label from the preset tightening torque database, and determining whether the first application scenario set is empty;

[0018] If the first application scenario set is empty, determining that there is no target application scenario matching the application scenario tag; otherwise, determining whether the first application scenario set is a single application scenario;

[0019] If the first application scenario set is the single application scenario, the single application scenario is used as the target application scenario; otherwise, based on the main scene label and the secondary scene label, each application scenario in the first application scenario set is matched respectively, and the application scene with the highest similarity is used as the target application scenario.

[0020] According to one embodiment of the present invention, determining the final tightening torque according to the test results includes:

[0021] Based on the test result, determining whether the initial tightening torque meets a preset durability requirement;

[0022] If the initial tightening torque meets the preset durability requirement, the initial tightening torque is used as the final tightening torque; otherwise, the initial tightening torque is optimized based on a preset optimization strategy, and a bench test is performed based on the optimized initial tightening torque until the preset durability requirement is met, and the optimized initial tightening torque is used as the final tightening torque.

[0023] According to one embodiment of the present invention, after determining the final tightening torque according to the test result, the method includes:

[0024] The preset tightening torque database is updated using the final tightening torque and the target application scenario corresponding to the final tightening torque.

[0025] According to the tightening torque determination method proposed in the embodiment of the present invention, the obtained tightening system information is labeled according to the application scenario identification, and the application scenario label of the corresponding tightening system information is searched based on the tightening torque database. If the application scenario label of the corresponding tightening system information exists in the tightening torque database, the corresponding tightening torque in the tightening torque database is used as the initial tightening torque, the whole vehicle is bench tested according to the initial tightening torque, and the final tightening torque is adjusted according to the test results. Therefore, by labeling the tightening system information and matching the corresponding tightening torque based on the tightening torque database, the accuracy and reliability of the calculation are improved, the workload of calculating the tightening torque in the whole vehicle design process is greatly reduced, the design cycle is shortened, and the number of production line tool types is reduced by reducing the redundancy of vehicle torque types, thereby reducing costs.

[0026] To achieve the above object, a second embodiment of the present invention provides a tightening torque determination device, comprising:

[0027] An acquisition module, used to acquire the fastening system information of the fastening torque to be set;

[0028] An identification and matching module, used to identify the application scenario of the fastening system information to obtain an application scenario label, and determine whether there is a target application scenario matching the application scenario label in a preset fastening torque database;

[0029] A determination module is used to, when there is a target application scenario matching the application scenario label, use the tightening torque corresponding to the target application scenario as the initial tightening torque, perform a bench test on the initial tightening torque, and determine the final tightening torque according to the test result.

[0030] According to one embodiment of the present invention, after determining whether there is a target application scenario matching the application scenario label in the preset tightening torque database, the identification and matching module is further used to:

[0031] If the preset tightening torque database does not contain a target application scenario matching the application scenario label, determining a maximum tightening torque and a minimum tightening torque based on the application scenario label;

[0032] A tightening torque interval range is determined according to the maximum tightening torque and the minimum tightening torque, and based on the tightening torque interval range, the final tightening torque is determined according to valid sequence data in other scenarios of the preset tightening torque database.

[0033] According to one embodiment of the present invention, before determining whether there is a target application scenario matching the application scenario label in the preset tightening torque database, the identification and matching module is further used to:

[0034] Acquire at least one attribute information of multiple target fasteners, wherein the attribute information includes connection attributes, specifications and pitch of fasteners, strength performance, fastener part number, part name, vehicle model, professional field of the assembly to which it belongs, fastening use position, application quantity, material properties of the fastener, installation hole size, strength information of hand threaded parts, bench test records, vehicle durability records, and measured parameters of historical tests;

[0035] For each target fastener, each attribute information of each target fastener is subjected to scene labeling processing, and the preset tightening torque database is generated according to the scene labeling processing result.

[0036] According to an embodiment of the present invention, the application scenario tag includes a primary scenario tag and a secondary scenario tag, and the identification and matching module is specifically used to:

[0037] Filtering out a first application scenario set that is completely consistent with the main scenario label from the preset tightening torque database, and determining whether the first application scenario set is empty;

[0038] If the first application scenario set is empty, determining that there is no target application scenario matching the application scenario tag; otherwise, determining whether the first application scenario set is a single application scenario;

[0039] If the first application scenario set is the single application scenario, the single application scenario is used as the target application scenario; otherwise, based on the main scene label and the secondary scene label, each application scenario in the first application scenario set is matched respectively, and the application scene with the highest similarity is used as the target application scenario.

[0040] According to an embodiment of the present invention, the determining module is specifically configured to:

[0041] Based on the test result, determining whether the initial tightening torque meets a preset durability requirement;

[0042] If the initial tightening torque meets the preset durability requirement, the initial tightening torque is used as the final tightening torque; otherwise, the initial tightening torque is optimized based on a preset optimization strategy, and a bench test is performed based on the optimized initial tightening torque until the preset durability requirement is met, and the optimized initial tightening torque is used as the final tightening torque.

[0043] According to one embodiment of the present invention, after determining the final tightening torque according to the test result, the determination module is further configured to:

[0044] The preset tightening torque database is updated using the final tightening torque and the target application scenario corresponding to the final tightening torque.

[0045] According to the fastening torque determination device proposed in the embodiment of the present invention, the fastening system information obtained is labeled according to the application scenario identification, and the application scenario label of the corresponding fastening system information is searched based on the fastening torque database. If the application scenario label of the corresponding fastening system information exists in the fastening torque database, the corresponding fastening torque in the fastening torque database is used as the initial fastening torque, the whole vehicle is bench tested according to the initial fastening torque, and the final fastening torque is adjusted according to the test results. Therefore, by labeling the fastening system information and matching the corresponding fastening torque based on the fastening torque database, the accuracy and reliability of the calculation are improved, the workload of calculating the fastening torque in the whole vehicle design process is greatly reduced, the design cycle is shortened, and the number of production line tool types is reduced by reducing the redundancy of vehicle torque types, thereby reducing costs.

[0046] To achieve the above objectives, a third aspect of the present invention proposes an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the tightening torque determination method as described in the above embodiments.

[0047] To achieve the above objectives, a fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the tightening torque determination method as described in the above embodiments.

[0048] To achieve the above objectives, a fifth aspect of the present invention provides a computer program product, including a computer program, which, when executed by a processor, is used to implement the tightening torque determination method as described in the above embodiments.

[0049] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0051] Figure 1 A flowchart of a method for determining a tightening torque provided by one embodiment of the present invention;

[0052] Figure 2 A schematic diagram of the operating principle of a method for determining a tightening torque according to a specific embodiment of the present invention;

[0053] Figure 3 A schematic diagram of a process of determining a tightening torque according to a specific embodiment of the present invention;

[0054] Figure 4 A block diagram of a device for determining a tightening torque according to an embodiment of the present invention;

[0055] Figure 5 It is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present invention.

[0056] Reference numerals:

[0057] 10 - tightening torque determination device; 100 - acquisition module, 200 - identification and matching module, 300 - determination module; 501 - memory, 502 - processor, 503 - communication interface. DETAILED DESCRIPTION

[0058] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0059] A method, device, electronic device, storage medium and product for determining tightening torque according to an embodiment of the present invention will be described below with reference to the accompanying drawings. First, a method for determining tightening torque according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0060] In view of the problem that the background technology relies too much on the experience of engineers, resulting in the results being not objective and reliable enough and the amount of calculation of the tightening torque being too large, the present invention provides a method for determining the tightening torque, by labeling the obtained tightening system information according to the application scenario identification, and searching the application scenario label of the corresponding tightening system information based on the tightening torque database. If the application scenario label of the corresponding tightening system information exists in the tightening torque database, the corresponding tightening torque in the tightening torque database is used as the initial tightening torque, and the whole vehicle is bench tested according to the initial tightening torque, and the final tightening torque is adjusted according to the test results. Therefore, by labeling the tightening system information and matching the corresponding tightening torque based on the tightening torque database, the accuracy and reliability of the calculation are improved, the workload of calculating the tightening torque in the whole vehicle design process is greatly reduced, the design cycle is shortened, and the number of production line tool types is reduced by reducing the redundancy of vehicle torque types, thereby reducing costs.

[0061] Figure 1 It is a flow chart of a method for determining a tightening torque provided by an embodiment of the present invention.

[0062] like Figure 1 As shown, the tightening torque determination method includes the following steps:

[0063] In step S101 , the fastening system information for which the fastening torque is to be set is acquired.

[0064] Specifically, the embodiments of the present invention can obtain the information of the fastening system based on the vehicle structure data and BOM (Bill of Material, that is, a file that describes the product structure in a data format), wherein the fastening system information includes: specifications and pitch of the fasteners, strength performance, fastener part number, part name, vehicle model, professional field of the assembly, fastening use location, application quantity, material properties of the fastened parts, installation hole size, strength information of the hand threaded parts, etc., and the relevant technical information can also be supplemented and reduced according to the specific situation when obtaining the information.

[0065] In step S102, application scenario identification is performed on the fastening system information to obtain an application scenario label, and it is determined whether there is a target application scenario matching the application scenario label in a preset fastening torque database.

[0066] Specifically, after acquiring the fastening system information, the embodiment of the present invention can identify and analyze the acquired fastening system information, classify it according to different information tags, and assign corresponding labels to the fastening system information in combination with different scenarios and technical attributes. Then, batch search and matching are performed by calling the information stored in the preset fastening torque database to find the target application scenario that matches the application scenario tag.

[0067] For example, in combination with the fastening system information obtained in step S101, the fastener specifications can be expressed in the form of M3, M4, M5, M6, M7, M8, M9, M10, M12, M14, M16, M18, M20, M22, M24, M40 commonly used in metric common threads and 7 / 16″ imperial threads, ST2.9, ST3.5, ST4.2, ST4.8, ST5.5, ST6.3, NST3, NST3.5, NST4, NST4.5, NST5, NST5.5, NST6, etc., and their information labels are respectively used, and other uncommon specifications are expressed according to actual conditions; the thread pitch can be expressed in the form of 0.5, 0.7, 0.8, 1, 1 .25, 1.5, 1.75, 2, 2.5 and imperial thread number of threads per inch 20, 16 etc. are used as information labels for pitch; strength performance can be expressed according to commonly used labels such as 4.8, 5.8, 6.8, 8.8, 9.8, 10.9, 12.9, 14.9 and 4, 04, 5, 05, 6, 8, 10, 12 etc., and other uncommon grades are expressed according to actual conditions; professional fields can be classified according to the actual fields of the fastening positions, and different professional information can be expressed with labels such as body, interior, exterior, chassis, power, integrated safety, intelligent networking, new energy etc.; other relevant information can be expressed according to actual conditions and given corresponding technical information labels.

[0068] In addition, the embodiments of the present invention should also assign other scene labels one by one according to different connection states, including but not limited to connection attribute labels, importance labels, tightening accuracy labels, etc. For example: connectors mainly made of steel materials and casting materials are hard connections, and connectors made of non-metallic materials such as plastics, soft metal materials, structural connectors with spring washers, hollow clamping structures, etc. are soft connections. Other structural features are assigned connection attribute labels of hard connection, soft connection and neutral connection according to neutral connection; according to the importance of the connection point required by the product function, the importance of the fastening connection point is defined as three categories, namely Class A, Class B, and Class C, and different importance labels are assigned respectively. Class A is a connection point that will cause important functional defects or loss of the whole vehicle or powertrain when the fastening torque fails, and then cause a major accident. Class B is a connection point that will cause important functional defects or loss of the whole vehicle or powertrain when the fastening torque fails, but does not cause a major accident. Class C is a fastening connection point other than Class A and Class B.

[0069] Further, in some embodiments, the application scenario label includes a main scenario label and a secondary scenario label, and determining whether there is a target application scenario matching the application scenario label in the preset tightening torque database includes: screening out a first application scenario set that is completely consistent with the main scenario label from the preset tightening torque database, and determining whether the first application scenario set is empty; if the first application scenario set is empty, determining that there is no target application scenario matching the application scenario label, otherwise, determining whether the first application scenario set is a single application scenario; if the first application scenario set is a single application scenario, taking the single application scenario as the target application scenario, otherwise, based on the main scenario label and the secondary scenario label, matching each application scenario in the first application scenario set respectively, and taking the application scenario with the highest similarity as the target application scenario.

[0070] Specifically, when performing scene matching analysis, the application scene labels can be divided into main scene labels and secondary scene labels, wherein the main scene labels can be the specifications and pitch, strength performance, connection properties, professional fields, etc. of the fasteners, and the others are secondary scene labels. First, a scene set that is completely consistent with the main scene label of the fastening system information is screened out from the preset fastening torque database as the first application scene set, and it is found whether the first application scene is empty. If the first application scene set is empty, it means that there is no application scene that is completely consistent with the main scene label of the fastening system information; if the first application scene set is not empty, there is an application scene that is completely consistent with the main scene label of the fastening system information. At this time, it is determined whether the first application scene set is a single application scene. If the first application scene set is a single application scene, the single application scene is used as the target application scene; if the first application scene set is a plurality of application scenes, the main scene label and the secondary scene label are combined to perform similarity matching with the first application scene, and the application scene with the highest similarity is selected as the target application scene.

[0071] In step S103, if there is a target application scenario that matches the application scenario label, the tightening torque corresponding to the target application scenario is used as the initial tightening torque, and the initial tightening torque is bench tested, and the final tightening torque is determined according to the test result.

[0072] Specifically, after obtaining the target application scenario that matches the application scenario label, the tightening torque corresponding to the target application scenario is searched in the database, and the tightening torque is used as the initial tightening torque. The connection points of the fastening system are tightened according to the initial tightening torque, and bench tests are performed through methods such as ultrasonic axial force measurement. The tightening torque is optimized based on the test results to obtain the most preferred final tightening torque.

[0073] As a possible implementation method, in some embodiments, the final tightening torque is determined based on the test results, including: based on the test results, judging whether the initial tightening torque meets the preset durability requirement; if the initial tightening torque meets the preset durability requirement, the initial tightening torque is used as the final tightening torque, otherwise, the initial tightening torque is optimized based on a preset optimization strategy, and a bench test is performed based on the optimized initial tightening torque until the preset durability requirement is met, and the optimized initial tightening torque is used as the final tightening torque.

[0074] Among them, the preset optimization strategy can be a solution set by technical personnel in this field according to actual needs, or it can be a solution obtained through a limited number of computer simulations, and is not specifically limited here.

[0075] Specifically, after obtaining the test results, the initial tightening torque is judged according to the preset durability requirements. If the test results corresponding to the initial tightening torque meet the preset durability requirements, it is proved that the solution generated by the initial tightening torque can meet the actual application requirements, and the initial tightening torque is used as the final tightening torque; if the test results corresponding to the initial tightening torque cannot meet the preset durability requirements, it is proved that the solution generated by the initial tightening torque cannot meet the actual application requirements. At this time, the initial tightening torque should be optimized based on the preset optimization strategy, and the optimized initial tightening torque should be bench tested until it meets the preset durability requirements, and the optimized initial tightening torque is used as the final tightening torque.

[0076] For example, the durability of the tightening torque is determined by verifying the design function requirements or clamping force requirements through vehicle or bench tests. If the tightening torque value meets the durability requirements, it is used as the formal tightening torque solution. If the durability requirements are not met, the embodiments of the present invention should analyze the reasons and further correct and optimize the tightening system parameters, including conducting consistency evaluation of test samples, improving the roughness of the clamped parts, optimizing the friction coefficient of the tightening system, improving the material properties of the fastened parts, etc., to meet the test requirements.

[0077] Therefore, the embodiment of the present invention labels the fastening system information and matches the corresponding application scenarios according to the labels, searches the database for the corresponding fastening torque according to the application scenarios, performs bench testing with the corresponding fastening torque, and corrects and optimizes the fastening torque according to the test results, thereby finally obtaining a fastening torque result with higher reliability and applicability. In this process, the conventional fastening torque calculation is replaced by the label search of the database, which saves a lot of cost.

[0078] Optionally, in some embodiments, after determining whether there is a target application scenario matching the application scenario label in the preset tightening torque database, it also includes: if there is no target application scenario matching the application scenario label in the preset tightening torque database, determining the maximum tightening torque and the minimum tightening torque based on the application scenario label; determining the tightening torque interval range according to the maximum tightening torque and the minimum tightening torque, and based on the tightening torque interval range, determining the final tightening torque according to the valid sequence data in other scenarios of the preset tightening torque database.

[0079] Specifically, when there is no matching application scenario in the tightening torque database, the embodiment of the present invention can also obtain the initial tightening torque range through theoretical calculation, and match the initial tightening torque range with the commonly used torque values ​​in the tightening torque database. For example, the initial tightening torque range obtained through theoretical calculation is approximately 153N.m~169N.m, and the commonly used torque stored in the tightening torque database is 160N.m, then 160N.m is used as the initial tightening torque.

[0080] For example, the theoretical calculation process described above can be to estimate the reasonable range of the tightening torque of the fastening system according to the minimum constraint load required by the structural function and the maximum limit load that the bolt and the mounting surface material can withstand. The calculation process is as follows:

[0081] (1) According to the surface conditions of the threaded part and the connected parts, the lubrication conditions and the corresponding friction coefficients of the thread and the supporting surface, the equivalent diameter of the friction torque of the supporting surface is calculated, and the maximum torque coefficient and the minimum torque coefficient of the current fastening system are obtained:

[0082]

[0083]

[0084] Among them, D w is the equivalent diameter of the bearing surface friction torque, d w is the outer diameter of the contact bearing surface, d h K is the inner diameter of the contact bearing surface, max is the maximum torque coefficient of the current fastening system, K min is the minimum torque coefficient of the current fastening system, P is the thread pitch, d is the basic size of the major diameter of the external thread, d2 is the basic size of the middle diameter of the thread, α is the thread flank angle, μ th,max is the maximum friction coefficient of the thread, μ th，min is the minimum friction coefficient of the thread, μ w,max is the maximum friction coefficient of the bearing surface, μ w,min is the minimum friction coefficient of the supporting surface;

[0085] (2) Calculate the minimum tightening torque: The minimum axial constraint load F required by the known structural function design f，min , that is, the clamping force f provided by the bolts and nuts that play a tightening role should satisfy: f ≥ F f，min According to the relationship between tightening torque and preload force T = K·F·d, it can be concluded that:

[0086] Minimum tightening torque T f,min =K max ×F f,min ×d

[0087] Further calculations yield

[0088] (3) Calculate the ultimate load that the fastening system can withstand: the surface compressive strength of the mounting surface material is known to be p, and the bolt yield strength is σ 0.2 , calculate the maximum load that the bolt and the mounting surface material can withstand, and take the smaller value as the maximum load that the fastening system can withstand.

[0089] The mounting surface material can withstand the ultimate load f1 = p·D w , the bolt can withstand the ultimate load f2 = σ 0.2 ·A s , where A s is the nominal stress cross-sectional area of ​​the thread, then the fastening system can withstand the ultimate load F f,max =min{f1,f2}

[0090] (4) Calculate the maximum tightening torque:

[0091] T f,max =K min ×F f,max ×d

[0092] Further calculations yield

[0093] (5) To judge the rationality of the tightening system, based on the tightening tool, the end point of tightening and other conditions, and considering the discrete accuracy m of the tightening torque, it should be confirmed that the corresponding ratio meets the following conditions:

[0094]

[0095] If it cannot be met, the rationality of the design and definition of the technical parameters of the current fastening system (including bolts, clamped parts, and internal threaded parts) should be evaluated, and optimization should be carried out by adjusting the type of lubricant, improving bolt performance and mounting surface strength, enhancing the stability of the friction coefficient of the fastening system, and reducing the discrete range of the technical parameter tolerances of each component.

[0096] (6) Based on the above analysis, the reasonable range of tightening torque of the tightening system is inferred to be T0, that is:

[0097]

[0098] Furthermore, in some embodiments, before determining whether there is a target application scenario matching the application scenario label in the preset tightening torque database, it also includes: obtaining at least one attribute information of multiple target fasteners, wherein the attribute information includes connection properties, specifications and pitch of the fastener, strength performance, fastener part number, part name, vehicle model, professional field of the assembly to which it belongs, fastening use location, application quantity, material properties of the fastened part, mounting hole size, strength information of hand threaded parts, bench test records, vehicle durability records, and measured parameters of historical tests; for each target fastener, performing scenario labeling processing on each attribute information of each target fastener, and generating a preset tightening torque database based on the scenario labeling processing results.

[0099] Specifically, when establishing a preset tightening torque database, the embodiment of the present invention can label the existing target fasteners according to their attribute information, and also label their application scenarios according to the labeled attribute information, and generate a preset tightening torque database based on the scenario labeling results.

[0100] Optionally, in some embodiments, after determining the final tightening torque according to the test result, the method includes: updating a preset tightening torque database using the final tightening torque and a target application scenario corresponding to the final tightening torque.

[0101] Specifically, after the tightening torque is corrected and optimized through the test results to obtain the final tightening torque, the embodiment of the present invention further updates the preset tightening torque data according to the final tightening torque and its corresponding target scenario.

[0102] For example, the experimenter can manually input or automatically update the final tightening torque and the target application scenario corresponding to the final tightening torque to a preset tightening torque database through program settings, and store them in the server.

[0103] In order to enable those skilled in the art to further understand the method for determining the tightening torque in the embodiment of the present application, it is described in detail below in conjunction with specific embodiments.

[0104] Specifically, Figure 2 As shown, Figure 2The schematic diagram of the operating principle of the tightening torque determination method provided according to a specific embodiment of the present invention, wherein the program of the embodiment of the present invention may include: an information extraction module, a theoretical calculation module, an identification and analysis module, a test tracking module, a matching and searching module, a statistical module, and a result output module. The tightening torque database in the server is established based on the company's past data. When the tightening torque setting work of a new model is started, the tightening torque determination program will extract the new model data and BOM information, and match and analyze it with the tightening torque database in the server to obtain the initial tightening torque. Further, by conducting bench tests or carrying out relevant vehicle durability tests, the reliability of its connection status is ensured, and its test records and test results are synchronized to the tightening torque database in the server. Subsequent models are cycled in sequence.

[0105] Furthermore, if Figure 3 As shown, Figure 3 A schematic flow chart of a method for determining a tightening torque according to a specific embodiment of the present invention includes the following steps:

[0106] S301, obtaining information of the fastening system according to the vehicle structure data and BOM.

[0107] S302: Identify and analyze the fastening system information to obtain a current application scenario label.

[0108] S303: Search in batches for target information matching the current application scenario tag according to the tightening torque database.

[0109] S304, determine whether there is a match, if there is a match, execute step S307; if there is no match, execute step S305.

[0110] S305, perform theoretical calculation.

[0111] S306, comparing with the tightening torque database.

[0112] S307, obtaining the initial tightening torque.

[0113] S308, conduct vehicle / bench test verification.

[0114] Among them, the bench test includes: tightening the connection points of the fastening system according to the initial tightening torque, and evaluating the relationship between the actual clamping force provided by the bolt and the design minimum axial constraint load through ultrasonic axial force measurement; the whole vehicle test verification includes: tightening the connection points of the fastening system according to the initial tightening torque, and conducting a complete vehicle comprehensive durability test, high-strength durability test and road adaptability test by carrying the whole vehicle, and further verifying the reliability and durability of the fastening system through regular and mileage inspections during the test and comprehensive inspection of the design function requirements or the degree of tightening torque attenuation after the test.

[0115] S309, determine whether the vehicle / bench test verification is passed, if yes, execute step S311; if not, execute step S310.

[0116] S310, the fastening system is optimized and corrected, and the process returns to step S308.

[0117] S311, determine the final tightening torque and update the database.

[0118] According to the tightening torque determination method proposed in the embodiment of the present invention, the obtained tightening system information is labeled according to the application scenario identification, and the application scenario label of the corresponding tightening system information is searched based on the tightening torque database. If the application scenario label of the corresponding tightening system information exists in the tightening torque database, the corresponding tightening torque in the tightening torque database is used as the initial tightening torque, the whole vehicle is bench tested according to the initial tightening torque, and the final tightening torque is adjusted according to the test results. Therefore, by labeling the tightening system information and matching the corresponding tightening torque based on the tightening torque database, the accuracy and reliability of the calculation are improved, the workload of calculating the tightening torque in the whole vehicle design process is greatly reduced, the design cycle is shortened, and the number of production line tool types is reduced by reducing the redundancy of vehicle torque types, thereby reducing costs.

[0119] Next, the tightening torque determination device according to the embodiment of the present invention will be described with reference to the accompanying drawings.

[0120] Figure 4 is a block diagram of a device for determining a tightening torque according to an embodiment of the present invention.

[0121] like Figure 4 As shown, the tightening torque determination device 10 includes: an acquisition module 100 , an identification and matching module 200 and a determination module 300 .

[0122] Wherein, the acquisition module 100 is used to acquire the fastening system information for setting the fastening torque;

[0123] The identification and matching module 200 is used to identify the application scenario of the fastening system information to obtain an application scenario label, and determine whether there is a target application scenario matching the application scenario label in the preset fastening torque database;

[0124] The determination module 300 is used to, when there is a target application scenario matching the application scenario label, use the tightening torque corresponding to the target application scenario as the initial tightening torque, perform a bench test on the initial tightening torque, and determine the final tightening torque according to the test result.

[0125] According to one embodiment of the present invention, after determining whether there is a target application scenario matching the application scenario label in the preset tightening torque database, the identification and matching module 200 is also used to: determine the maximum tightening torque and the minimum tightening torque based on the application scenario label if there is no target application scenario matching the application scenario label in the preset tightening torque database; determine the tightening torque interval range according to the maximum tightening torque and the minimum tightening torque, and determine the final tightening torque based on the tightening torque interval range and the valid sequence data in other scenarios of the preset tightening torque database.

[0126] According to one embodiment of the present invention, before determining whether there is a target application scenario matching the application scenario label in a preset tightening torque database, the identification and matching module 200 is further used to: obtain at least one attribute information of multiple target fasteners, wherein the attribute information includes connection properties, specifications and pitch of the fastener, strength performance, fastener part number, part name, vehicle model, professional field of the assembly to which it belongs, fastening use location, application quantity, material properties of the fastened part, mounting hole size, strength information of hand threaded parts, bench test records, vehicle durability records, and measured parameters of historical tests; for each target fastener, each attribute information of each target fastener is subjected to scenario labeling processing, and a preset tightening torque database is generated according to the scenario labeling processing results.

[0127] According to one embodiment of the present invention, the application scenario label includes a main scenario label and a secondary scenario label, and the identification and matching module 200 is specifically used to: filter out a first application scenario set that is completely consistent with the main scenario label from a preset tightening torque database, and determine whether the first application scenario set is empty; if the first application scenario set is empty, it is determined that there is no target application scenario that matches the application scenario label, otherwise, it is determined whether the first application scenario set is a single application scenario; if the first application scenario set is a single application scenario, the single application scenario is used as the target application scenario, otherwise, based on the main scenario label and the secondary scenario label, each application scenario in the first application scenario set is matched respectively, and the application scene with the highest similarity is used as the target application scene.

[0128] According to one embodiment of the present invention, the determination module 300 is specifically used to: determine whether the initial tightening torque meets the preset durability requirement based on the test results; if the initial tightening torque meets the preset durability requirement, the initial tightening torque is used as the final tightening torque; otherwise, the initial tightening torque is optimized based on a preset optimization strategy, and a bench test is performed based on the optimized initial tightening torque until the preset durability requirement is met, and the optimized initial tightening torque is used as the final tightening torque.

[0129] According to an embodiment of the present invention, after determining the final tightening torque according to the test results, the determination module 300 is further used to: update a preset tightening torque database using the final tightening torque and the target application scenario corresponding to the final tightening torque.

[0130] According to the fastening torque determination device proposed in the embodiment of the present invention, the fastening system information obtained is labeled according to the application scenario identification, and the application scenario label of the corresponding fastening system information is searched based on the fastening torque database. If the application scenario label of the corresponding fastening system information exists in the fastening torque database, the corresponding fastening torque in the fastening torque database is used as the initial fastening torque, the whole vehicle is bench tested according to the initial fastening torque, and the final fastening torque is adjusted according to the test results. Therefore, by labeling the fastening system information and matching the corresponding fastening torque based on the fastening torque database, the accuracy and reliability of the calculation are improved, the workload of calculating the fastening torque in the whole vehicle design process is greatly reduced, the design cycle is shortened, and the number of production line tool types is reduced by reducing the redundancy of vehicle torque types, thereby reducing costs.

[0131] Figure 5 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. The electronic device may include:

[0132] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0133] When the processor 502 executes the program, the tightening torque determination method provided in the above embodiment is implemented.

[0134] Furthermore, the electronic device further comprises:

[0135] The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0136] The memory 501 is used to store computer programs that can be executed on the processor 502 .

[0137] The memory 501 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0138] If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 can be connected to each other through a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0139] Optionally, in a specific implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0140] The processor 502 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present invention.

[0141] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the above method for determining the tightening torque is implemented.

[0142] An embodiment of the present invention further provides a computer program product, including a computer program, which implements the above tightening torque determination method when executed by a processor.

[0143] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0144] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0145] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for determining a tightening torque, characterized in that: The following steps are involved: Acquire fastening system information for which a fastening torque is to be set; Performing application scenario identification on the fastening system information to obtain an application scenario label, and determining whether there is a target application scenario matching the application scenario label in a preset fastening torque database; If there is a target application scenario that matches the application scenario label, the tightening torque corresponding to the target application scenario is used as the initial tightening torque, and a bench test is performed on the initial tightening torque, and the final tightening torque is determined according to the test result.

2. The method according to claim 1, characterized in that After determining whether there is a target application scenario matching the application scenario label in the preset tightening torque database, the method further includes: If the preset tightening torque database does not contain a target application scenario matching the application scenario label, determining a maximum tightening torque and a minimum tightening torque based on the application scenario label; A tightening torque interval range is determined according to the maximum tightening torque and the minimum tightening torque, and based on the tightening torque interval range, the final tightening torque is determined according to valid sequence data in other scenarios of the preset tightening torque database.

3. The method according to claim 1 or 2, characterized in that: Before determining whether there is a target application scenario matching the application scenario label in the preset tightening torque database, the method further includes: Acquire at least one attribute information of multiple target fasteners, wherein the attribute information includes connection attributes, specifications and pitch of fasteners, strength performance, fastener part number, part name, vehicle model, professional field of the assembly to which it belongs, fastening use position, application quantity, material properties of the fastener, installation hole size, strength information of hand threaded parts, bench test records, vehicle durability records, and measured parameters of historical tests; For each target fastener, each attribute information of each target fastener is subjected to scene labeling processing, and the preset tightening torque database is generated according to the scene labeling processing result.

4. The method according to claim 1, characterized in that The application scenario tag includes a primary scenario tag and a secondary scenario tag, and the step of determining whether there is a target application scenario matching the application scenario tag in a preset tightening torque database includes: Filtering out a first application scenario set that is completely consistent with the main scenario label from the preset tightening torque database, and determining whether the first application scenario set is empty; If the first application scenario set is empty, determining that there is no target application scenario matching the application scenario tag; otherwise, determining whether the first application scenario set is a single application scenario; If the first application scenario set is the single application scenario, the single application scenario is used as the target application scenario; otherwise, based on the main scene label and the secondary scene label, each application scenario in the first application scenario set is matched respectively, and the application scene with the highest similarity is used as the target application scenario.

5. The method according to claim 1, characterized in that Determining the final tightening torque according to the test results includes: Based on the test result, determining whether the initial tightening torque meets a preset durability requirement; If the initial tightening torque meets the preset durability requirement, the initial tightening torque is used as the final tightening torque; otherwise, the initial tightening torque is optimized based on a preset optimization strategy, and a bench test is performed based on the optimized initial tightening torque until the preset durability requirement is met, and the optimized initial tightening torque is used as the final tightening torque.

6. The method according to claim 1, characterized in that After determining the final tightening torque according to the test result, the method comprises: The preset tightening torque database is updated using the final tightening torque and the target application scenario corresponding to the final tightening torque.

7. A tightening torque determination device, characterized in that: include: An acquisition module, used to acquire the fastening system information of the fastening torque to be set; An identification and matching module, used to identify the application scenario of the fastening system information to obtain an application scenario label, and determine whether there is a target application scenario matching the application scenario label in a preset fastening torque database; A determination module is used to, when there is a target application scenario matching the application scenario label, use the tightening torque corresponding to the target application scenario as the initial tightening torque, perform a bench test on the initial tightening torque, and determine the final tightening torque according to the test result.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the tightening torque determination method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the tightening torque determination method according to any one of claims 1 to 6.

10. A computer program product, characterized in that It comprises a computer program, which, when executed by a processor, is used to implement the tightening torque determination method according to any one of claims 1 to 6.

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