CN111581869A - Method, device and storage medium for establishing bolt connection - Google Patents
Method, device and storage medium for establishing bolt connection Download PDFInfo
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- CN111581869A CN111581869A CN202010471265.5A CN202010471265A CN111581869A CN 111581869 A CN111581869 A CN 111581869A CN 202010471265 A CN202010471265 A CN 202010471265A CN 111581869 A CN111581869 A CN 111581869A
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Abstract
The invention provides a method, a device and a storage medium for establishing bolt connection, wherein a target model is preprocessed through simulation software to obtain an appointed washbner surface of each bolt hole in the target model; for each designated washbner surface, determining a target washbner surface associated with the designated washbner surface according to the surface thickness of the designated washbner surface; and establishing a bolt connection relation between the designated washbner surface and the target washbner surface according to the central distance between the designated washbner surface and the target washbner surface. In the mode, the positions of bolt holes in the target model do not need to be judged manually, bolt connection is automatically identified and established through simulation software, grid processing of solid bolts and manual selection of the bolt positions are avoided, calculation accuracy is guaranteed, calculation amount is reduced, and efficiency of establishing bolt connection is improved.
Description
Technical Field
The present invention relates to the field of bolt connection technologies, and in particular, to a method and an apparatus for establishing a bolt connection, and a storage medium.
Background
At present, finite element simulation analysis means are more and more applied to the automobile industry and guide the structural design of key parts of the finite element simulation analysis means. However, due to the complexity of automotive component models, particularly truck frames, hundreds or thousands of bolts are present for only one frame; the existing method for establishing bolt connection usually deletes the original bolt solid model, and replaces the bolt connection function by establishing a beam unit or a rigid unit. However, for a large model, under the condition of a large number of bolts, a large number of bolt connections often need a simulation engineer to establish a bolt connection relationship by clicking and selecting each bolt hole in the model by using simulation software, and different material attributes are given according to different bolt models, so that a large amount of time is needed for the engineer, and the efficiency is low.
Disclosure of Invention
In view of the above, the present invention provides a method, an apparatus and a storage medium for establishing a bolt connection, so as to improve the efficiency of establishing the bolt connection.
In a first aspect, an embodiment of the present invention provides a method for establishing a bolt connection, including: obtaining a target model; preprocessing a target model to obtain an appointed washbner surface of each bolt hole in the target model; for each designated washbner surface, determining a target washbner surface associated with the designated washbner surface according to the surface thickness of the designated washbner surface; and establishing a bolt connection relation between the designated washbner surface and the target washbner surface according to the central distance between the designated washbner surface and the target washbner surface.
Further, the step of preprocessing the target model to obtain the designated washber surface of each bolt hole in the target model includes: performing surface extraction, washer processing, grid drawing and material attribute setting processing on the target model to obtain a processed target model; automatically hiding the processed entity of the target model to obtain a display surface of the target model; determining the position information of each bolt hole in the target model by identifying the length of the closed free edge in the display surface; and determining the designated washbner surface of each bolt hole in the target model according to the position information.
Further, after determining the designated washbner surface of each bolt hole in the target model, the method further includes: and removing the designated washbner faces which do not meet a preset area threshold value aiming at each designated washbner face.
Further, the step of determining a target washbner face associated with the specified washbner face according to the face thickness of the specified washbner face includes: extracting the central point of the designated washbner surface, and determining the vertical direction of the designated washbner surface as a target direction; and determining all target washbhar surfaces included in a first preset distance from the center point as target washbhar surfaces associated with the specified washbhar surfaces by taking the target direction as a reference.
Further, the step of determining all target washbowl faces included within a first preset distance from the center point as target washbowl faces associated with the designated washbowl face with reference to the target direction includes: taking the target direction as a reference, extracting all target surfaces included in a first preset distance from a central point; and for each target surface, extracting a target washbner surface meeting a preset area threshold, and determining the extracted target washbner surface as the target washbner surface associated with the specified washbner surface.
Further, the step of establishing a bolt connection relationship between the designated washbner surface and the target washbner surface according to the center distance between the designated washbner surface and the target washbner surface includes: determining the distance between the center point of the designated washboard and the center point of the target washboard as a center distance value aiming at each target washboard associated with the designated washboard; calculating the average value of the surface thickness value of the target washbner surface and the surface thickness value of the designated washbner surface to obtain a target thickness value; if the absolute value of the difference value of the central distance value minus the target thickness value meets a second preset distance, determining that the target washbher surface and the designated washbher surface have a connection relation; saving the designated washbner surface and the target washbner surface with the connection relation into a preset list; and establishing bolt connection between the designated washbner surface and the target washbner surface.
Further, the step of establishing a bolted connection between the designated washbner face and the target washbner face includes: connecting each node and a center point of the target washbner surface, and connecting each node and the center point of the designated washbner surface to obtain the radius of a plurality of holes; extracting a minimum radius value of the radius of the plurality of holes; and determining the type of the bolt according to the minimum radius value.
Further, if the absolute value of the difference between the central distance value and the target thickness value is subtracted, and the second preset distance is satisfied, after it is determined that the target washbner surface and the specified washbner surface have a connection relationship, the method further includes: if the designated washbner surface and the target washbner surface which have the connection relation belong to a preset list, stopping executing the step of establishing bolt connection between the designated washbner surface and the target washbner surface; the step of determining the target washbner face associated with the specified washbner face continues for the next specified washbner face.
In a second aspect, an embodiment of the present invention provides an apparatus for establishing a bolt connection, including: the preprocessing module is used for acquiring a target model; preprocessing a target model to obtain an appointed washbner surface of each bolt hole in the target model; the determining module is used for determining a target washbner surface related to the designated washbner surface according to the surface thickness of the designated washbner surface aiming at each designated washbner surface; and the connection module is used for establishing a bolt connection relation between the designated washber surface and the target washber surface according to the central distance between the designated washber surface and the target washber surface.
In a third aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processing device to perform the steps of the method for establishing a bolt connection according to any one of the first aspect.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a method, a device and a storage medium for establishing bolt connection, wherein a target model is preprocessed through simulation software to obtain an appointed washber surface of each bolt hole in the target model; for each designated washbner surface, determining a target washbner surface associated with the designated washbner surface according to the surface thickness of the designated washbner surface; and establishing a bolt connection relation between the designated washbner surface and the target washbner surface according to the central distance between the designated washbner surface and the target washbner surface. In the mode, the positions of bolt holes in the target model do not need to be judged manually, bolt connection is automatically identified and established through simulation software, grid processing of solid bolts and manual selection of the bolt positions are avoided, calculation accuracy is guaranteed, calculation amount is reduced, and efficiency of establishing bolt connection is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for establishing a bolt connection according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a finite element model without bolt connection according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for establishing a bolted connection according to an embodiment of the present invention;
FIG. 4 is a schematic view of a double-deck bolt connection model according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a finite element model for bolt connection according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a device for establishing a bolt connection according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, finite element simulation analysis means are more and more applied to the automobile industry and guide the structural design of key parts of the finite element simulation analysis means. However, due to the complexity of automotive component models, particularly truck frames, hundreds or thousands of bolts are present for only one frame; the existing method for establishing bolt connection usually deletes the original bolt solid model, and because dividing and processing bolt grids to establish the contact relation of bolts can bring a large workload, the industry basically replaces the bolt connection function by establishing beam units or rigid units. However, a large number of bolt connections often require a simulation engineer to establish a bolt connection relationship by clicking and selecting each bolt hole in the model using simulation software, and different material attributes are given according to different bolt models, so that a large amount of time is required for the engineer, and the efficiency is low. Based on the above, the method, the device and the storage medium for establishing the bolt connection provided by the embodiment of the invention can be applied to various simulation software with a finite element simulation analysis function. For the understanding of the present embodiment, a method for establishing a bolt connection disclosed in the present embodiment will be described in detail.
The first embodiment is as follows:
the embodiment provides a method for establishing bolt connection, which can be applied to various simulation software with finite element simulation analysis function, such as hypermesh software; the hypermesh software has a powerful finite element meshing preprocessing function, including preprocessing, solver and a module with complete postprocessing, and can be directly input into an existing Three-dimensional CAD (Computer Aided Design) geometric model, such as UG (Unigraphics NX), Pro/E (Pro/Engineer), CATIA (Computer Aided Three-dimensional Interactive application) and other existing finite element models, and the imported efficiency and the quality of the model are high, so that a plurality of repetitive works can be greatly reduced, and a CAE (Computer Aided Engineering) analysis Engineer can put more energy and time into analysis and calculation work. As shown in fig. 1, the method comprises the steps of:
step S102, obtaining a target model; preprocessing a target model to obtain an appointed washbner surface of each bolt hole in the target model;
the target model may be an existing finite element model, such as the bolt-connected finite element model shown in fig. 2; and (4) encrypting grids around the bolt holes in the target model, and adding nodes of the grids to obtain the designated washbher surface. Specifically, hypermesh software can be utilized, and TCL language is used for carrying out secondary development on hypermesh; firstly, inputting the established finite element model, namely the target model, into hypermesh software, opening the model, and then carrying out meshing, geometric cleaning and other treatments on the model to display each surface of the target model; the positions of the bolt holes in each face and the designated washbner face of each bolt hole can be identified by an identification method such as a neural network.
Step S104, determining a target washbner surface associated with each designated washbner surface according to the surface thickness of the designated washbner surface;
the number of the target washbaser surfaces can be one, two or more, and certainly, the target washbaser surfaces can be absent; if the target washbner surface associated with the specified washbner surface is not determined according to the surface thickness of the specified washbner surface, continuing to execute the step S104, and determining the target washbner surface associated with the specified washbner surface according to the surface thickness of the specified washbner surface aiming at the next specified washbner surface; if the target washbner surface associated with the specified washbner surface is determined according to the surface thickness of the specified washbner surface, the process proceeds to step S106.
The thickness of the designated washbner surface can be obtained by extracting the thickness of the plate unit of the target model before preprocessing; the thickness value in the material property of the designated washboard corresponding to the comps (parts) can be read; the target washbner surface may be specific, and for each designated washbner surface, a preset parameter may be set according to the property of the actual target model and the surface thickness of the designated washbner surface; searching all the surfaces included in the range meeting the preset parameters in the specified direction of the specified washbner surface by taking the specified washbner surface as a reference, and determining all the searched surfaces as the target washbner surface associated with the specified washbner surface; the above-mentioned appointed direction can be the vertical direction, can also be other directions; the preset parameter may be a value obtained by multiplying 1.2 by the thickness of the face of the designated washbner face, a value obtained by multiplying 1.5 by the thickness of the face of the designated washbner face, a value obtained by multiplying 2 by the thickness of the face of the designated washbner face, or the like.
And S106, establishing a bolt connection relation between the designated washbner surface and the target washbner surface according to the central distance between the designated washbner surface and the target washbner surface.
Specifically, for the specified washbner face, the center distances between the specified washbner face and all target washbner faces associated with the specified washbner face, the face thickness of the specified washbner face and the face thickness of each target washbner face are calculated, and the face thickness of the specified washbner face and the face thickness of each target washbner face may be added to obtain one or more face thickness sums; and comparing the center distance with the sum of the thicknesses of the surfaces to determine the target thickness meeting the preset condition, and establishing a bolt connection relation between the target washbner surface and the specified washbner surface, wherein the bolt connection function can be replaced by establishing a beam unit or a rigid unit. In addition, the sizes of the bolt holes corresponding to the washbher surfaces of two bolts with bolt connection relations are the same, and the types of the bolts can be determined according to the sizes of the bolt holes of the washbher surfaces.
The embodiment of the invention provides a method for establishing bolt connection, which comprises the steps of preprocessing a target model through simulation software to obtain an appointed washbner surface of each bolt hole in the target model; for each designated washbner surface, determining a target washbner surface associated with the designated washbner surface according to the surface thickness of the designated washbner surface; and establishing a bolt connection relation between the designated washbner surface and the target washbner surface according to the central distance between the designated washbner surface and the target washbner surface. In the mode, the positions of bolt holes in the target model do not need to be judged manually, bolt connection is automatically identified and established through simulation software, grid processing of solid bolts and manual selection of the bolt positions are avoided, calculation accuracy is guaranteed, calculation amount is reduced, and efficiency of establishing bolt connection is improved.
Example two:
the present embodiment provides another method for establishing a bolt connection, which is implemented on the basis of the above-mentioned embodiments, as shown in fig. 3, and includes the following steps:
step S302, carrying out surface extraction, washer processing, grid drawing and material attribute setting processing on the target model to obtain a processed target model;
the above-mentioned drawing the middle surface, can be according to the drawing the middle surface function that the emulation software is self-carried, through choosing the appropriate parameter to draw the middle surface to process to the goal model; usually, when a target model is subjected to mesh processing, a washbner unit is required to be arranged around a bolt hole, namely the washbner processing is carried out, and the bolt hole of the target model after the center is drawn can be subjected to washbner processing by selecting appropriate parameters according to a washbner function of simulation software; the drawing of the grid is usually carried out on the target model after the drawing of the center plane or the drawing of the center plane and the target model after the washbher processing by selecting a proper grid size and other parameters according to the grid drawing function of the simulation software; usually, the area of the bolt holes after the wash treatment is smaller and more dense than that of other grids around the bolt holes.
Step S304, automatically hiding the processed entity of the target model to obtain a display surface of the target model;
step S306, determining the position information of each bolt hole in the target model by identifying the length of the closed free edge in the display surface;
in general, closed free edges with long lengths exist around bolt holes processed by a washber, if the bolt holes exist in a display surface, the long closed free edges exist in the display surface, whether the lengths of the closed free edges meet preset conditions can be judged by identifying all the closed free edges contained in all the display surfaces, and if the lengths of the closed free edges meet the preset conditions, the positions of the closed free edges are determined as the positions of the bolt holes; the preset condition can be set according to parameters selected during the washber processing, for example, the radius of the washber unit in the bolt hole is set to be a during the washber processing, and the preset condition can be that the length of the closed free edge is larger than or equal to the perimeter of the radius of the closed free edge, which is a.
Step S308, determining the designated washbner surface of each bolt hole in the target model according to the position information;
step S310, extracting the center point of the designated washbner surface, and determining the vertical direction of the designated washbner surface as a target direction;
the specific position of each designated washbner surface can be determined according to the position information, the central point of each designated washbner surface is extracted aiming at each designated washbner surface, and the vertical direction of each designated washbner surface is determined as the target direction; specifically, according to the position information of the designated washbner surface, the center point of the bolt hole in the designated washbner surface is extracted, the center point is used as the center of a circle, the vertical direction of the designated washbner surface is determined as a target direction, and the target direction can be two vertical directions of the designated washbner surface.
Step S312, determining all target washbsers surfaces included in a first preset distance from the center point as target washbsers surfaces associated with the designated washbsers surfaces by taking the target direction as a reference;
the first preset distance may be 1.5 times the surface thickness value of the designated washbner surface; and searching all target washbowl faces included in a first preset distance from the center point in two vertical directions of the designated washbowl face, and determining the target washbowl faces associated with the designated washbowl faces.
Preferably, all target surfaces included in a first preset distance from the center point are extracted by taking the target direction as a reference; and for each target surface, extracting a target washbner surface meeting a preset area threshold, and determining the extracted target washbner surface as the target washbner surface associated with the specified washbner surface.
The preset area threshold value can be determined according to the area of the designated washbner surface, and after the washbner processing is usually performed, the area of the designated washbner surface where the bolt hole is located is smaller, so that the surfaces smaller than the preset area threshold value in all the extracted target surfaces can be extracted, and the extracted target washbner surface meeting the preset area threshold value is determined as the target washbner surface associated with the designated washbner surface.
Step S314, determining the distance between the center point of the designated washbner surface and the center point of the target washbner surface as a center distance value aiming at each target washbner surface associated with the designated washbner surface;
step S316, calculating the average value of the surface thickness value of the target washbner surface and the surface thickness value of the designated washbner surface to obtain a target thickness value; if the absolute value of the difference value of the central distance value minus the target thickness value meets a second preset distance, determining that the target washbher surface and the designated washbher surface have a connection relation;
the second preset distance may be set according to the property of the target model itself, and is usually set to a value close to zero, but may be set to be slightly larger to compensate for the dimensional error of the target model itself, and usually does not exceed the surface thickness, and the setting mode is more universal for the model.
Specifically, the center distance between each target washbner surface associated with the specified washbner surface and the specified washbner surface is sequentially judged, and if the absolute value of the value obtained by subtracting the thickness value of the target surface from the center distance value is smaller than or equal to a second preset distance, the target washbner surface and the specified washbner surface can be determined to be the surfaces where the bolt holes are located, and the two washbner surfaces have a connection relation.
For example, the schematic diagram of the double-deck bolt connection model shown in fig. 4, the middle plane of the panel a includes two circular areas a1 and a2, which can be understood as two designated washer planes, and the middle plane of the panel B includes three circular areas B1, B2, and B3, which can be understood as three target washer planes; t is taTo specify the face thickness, t, of the washbner facebTo specify the face thickness of the washbher face, first, the average value (t) of the face thickness value of the target washbher face B1 and the face thickness value of the specified washbher face a1 is calculated for the specified washbher face a1 (t)a+tb)/2，I.e. the target thickness value; as can be seen from FIG. 3, the center distance between target wasper face B1 and designated wasper face A1 is equal to (t)a+tb) And 2, the absolute value of the difference between the central distance value and the target thickness value is subtracted to satisfy the second preset distance, and the two washbher faces A1 and B1 have a connection relation.
For the designated washbher face a2, the average (t) of the face thickness value of the target washbher face B1 and the face thickness value of the designated washbher face a2 is calculateda+tb) (ii)/2, the target thickness value; as can be seen from FIG. 3, the center distance between target wasper face B1 and designated wasper face A1 is greater than (t)a+tb) The second preset distance is not satisfied by/2, i.e., the absolute value of the difference between the center distance value and the target thickness value, and the two washbher faces a2 and B1 do not have a connected relationship.
Step S318, storing the designated washbner surface and the target washbner surface with the connection relation into a preset list; and establishing bolt connection between the designated washbner surface and the target washbner surface.
The preset list is empty in the initial state; specifically, the designated washbner surface and the target washbner surface which have a connection relation are bound with the surface center node respectively through nodes on the two surfaces, a beam unit or a rigid unit is built, and the purpose that the designated washbner surface and the target washbner surface which have the connection relation are connected through bolts is achieved.
Preferably, connecting each node and a center point of the target washbner surface, and connecting each node and a center point of the designated washbner surface to obtain a plurality of hole radiuses; extracting a minimum radius value of the radius of the plurality of holes; and determining the type of the bolt according to the minimum radius value.
And based on the calculated minimum radius value, according to the type of the actual target model, giving beam material attributes to line segments for connecting each node and the central point of the target washbner surface and line segments for connecting each node and the central point of the designated washbner surface.
Further, if the absolute value of the difference between the central distance value and the target thickness value is subtracted, and the second preset distance is satisfied, after it is determined that the target washbner surface and the specified washbner surface have a connection relationship, the method further includes: if the designated washbner surface and the target washbner surface which have the connection relation belong to a preset list, stopping executing the step of establishing bolt connection between the designated washbner surface and the target washbner surface; for the next designated washbner face, the step of determining the target washbner face associated with the designated washbner face is continued.
Specifically, for all the designated washbsers in the target model, according to a certain sequence, by using a cyclic mode, firstly determining a target washbser surface associated with one of the designated washbsers, and if the target washbser surface exists, determining the target washbser surface having a connection relation with the designated washbser surface; then, whether the designated washbner surface and the target washbner surface with the connection relationship belong to a preset list is judged, the designated washbner surface and the target washbner surface with the connection relationship may be compared with the designated washbner surface and the target washbner surface with the connection relationship stored in the preset list, if yes, the step S104 is returned, and the step of determining the target washbner surface associated with the designated washbner surface is continuously executed for the next designated washbner surface. In this way, repeated establishment of bolted connections at the same position can be avoided, for example, in the finite element model after the bolted connections are established as shown in fig. 5, 2 beam units are generated at last for 3 layers of boards, 3 beam units are generated for 4 layers of boards, and the like; wherein the beam unit is a three-dimensional elastic beam unit which can be used for bearing tension, compression, bending and torsion.
In addition, through debugging and verification, the method is not limited by a finite element model, and the method of the embodiment of the invention can be realized for the sheet metal part structure after the middle surface is extracted; according to the method, the bolt holes of the target model can be automatically identified by one key, the bolt hole connection of the finite element 2-dimensional grid model is established, and the bolt holes do not need to be judged and manually selected. The secondary development program can automatically endow the bolted beam unit with corresponding material section properties according to the obtained hole size; the bolt connection of the multilayer board can be realized without limiting the number of layers; the expression form is that a beam unit is established between two plates to replace bolt connection, and n-1 bolt connections are established between n layers of plates; the grid processing of the entity bolt and the manual selection of the bolt position are avoided, the calculation accuracy is guaranteed, meanwhile, the calculation amount is greatly reduced, and the simulation analysis efficiency is improved.
Example three:
corresponding to the above method embodiment, an embodiment of the present invention provides an apparatus for establishing a bolt connection, as shown in fig. 6, the apparatus includes:
a preprocessing module 61, configured to obtain a target model; preprocessing a target model to obtain an appointed washbner surface of each bolt hole in the target model;
a determining module 62, configured to determine, for each specified washbner face, a target washbner face associated with the specified washbner face according to the face thickness of the specified washbner face;
and the connection module 63 is configured to establish a bolt connection relationship between the designated washbner surface and the target washbner surface according to the center distance between the designated washbner surface and the target washbner surface.
The embodiment of the invention provides a device for establishing bolt connection, which is characterized in that a target model is preprocessed through simulation software to obtain an appointed washbner surface of each bolt hole in the target model; for each designated washbner surface, determining a target washbner surface associated with the designated washbner surface according to the surface thickness of the designated washbner surface; and establishing a bolt connection relation between the designated washbner surface and the target washbner surface according to the central distance between the designated washbner surface and the target washbner surface. In the mode, the positions of bolt holes in the target model do not need to be judged manually, bolt connection is automatically identified and established through simulation software, grid processing of solid bolts and manual selection of the bolt positions are avoided, calculation accuracy is guaranteed, calculation amount is reduced, and efficiency of establishing bolt connection is improved.
Further, the preprocessing module is further configured to: performing surface extraction, washer processing, grid drawing and material attribute setting processing on the target model to obtain a processed target model; automatically hiding the processed entity of the target model to obtain a display surface of the target model; determining the position information of each bolt hole in the target model by identifying the length of the closed free edge in the display surface; and determining the designated washbner surface of each bolt hole in the target model according to the position information.
Further, the above apparatus is further configured to: and removing the designated washbner faces which do not meet the preset area threshold value aiming at each designated washbner face.
Further, the determining module is further configured to: extracting the central point of the designated washbner surface, and determining the vertical direction of the designated washbner surface as a target direction; and determining all target washbhar surfaces included in a first preset distance from the center point as target washbhar surfaces associated with the specified washbhar surfaces by taking the target direction as a reference.
Further, the determining module is further configured to: taking the target direction as a reference, extracting all target surfaces included in a first preset distance from a central point; and for each target surface, extracting a target washbner surface meeting a preset area threshold, and determining the extracted target washbner surface as the target washbner surface associated with the specified washbner surface.
Further, the connection module is further configured to: determining the distance between the center point of the designated washboard and the center point of the target washboard as a center distance value aiming at each target washboard associated with the designated washboard; calculating the average value of the surface thickness value of the target washbner surface and the surface thickness value of the designated washbner surface to obtain a target thickness value; if the absolute value of the difference value of the central distance value minus the target thickness value meets a second preset distance, determining that the target washbher surface and the designated washbher surface have a connection relation; saving the designated washbner surface and the target washbner surface with the connection relation into a preset list; and establishing bolt connection between the designated washbner surface and the target washbner surface.
Further, the connection module is further configured to: connecting each node and a center point of the target washbner surface, and connecting each node and the center point of the designated washbner surface to obtain the radius of a plurality of holes; extracting a minimum radius value of the radius of the plurality of holes; and determining the type of the bolt according to the minimum radius value.
Further, the above apparatus is further configured to: if the designated washbner surface and the target washbner surface which have the connection relation belong to a preset list, stopping executing the step of establishing bolt connection between the designated washbner surface and the target washbner surface; the step of determining the target washbner face associated with the specified washbner face continues for the next specified washbner face.
The device for establishing the bolt connection provided by the embodiment of the invention has the same technical characteristics as the method for establishing the bolt connection provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processing device, performs the steps of the method for establishing a bolt connection as described above.
The method, the apparatus, and the computer program product of the storage medium for establishing a bolt connection provided in the embodiments of the present invention include a computer-readable storage medium storing program codes, where instructions included in the program codes may be used to execute the method described in the foregoing method embodiments, and specific implementations may refer to the method embodiments and are not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that the following embodiments are merely illustrative of the present invention, and not restrictive, and the scope of the present invention is not limited thereto: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method of establishing a bolted connection, comprising:
obtaining a target model; preprocessing the target model to obtain an appointed washber surface of each bolt hole in the target model;
for each designated washbner face, determining a target washbner face associated with the designated washbner face according to the face thickness of the designated washbner face;
and establishing a bolt connection relation between the designated washbner surface and the target washbner surface according to the central distance between the designated washbner surface and the target washbner surface.
2. The method of claim 1, wherein the step of preprocessing the target model to obtain the designated washbner face of each bolt hole in the target model comprises:
performing surface extraction, washer processing, grid drawing and material attribute setting processing on the target model to obtain the processed target model;
automatically hiding the processed entity of the target model to obtain a display surface of the target model;
determining position information of each bolt hole in the target model by identifying the length of a closed free edge in the display surface;
and determining the designated washbner surface of each bolt hole in the target model according to the position information.
3. The method of claim 2, wherein after determining the designated washbher face for each bolt hole in the target model, the method further comprises:
and removing the designated washbner faces which do not meet a preset area threshold value aiming at each designated washbner face.
4. The method of claim 1, wherein the step of determining the target washbner face associated with the specified washbner face based on the face thickness of the specified washbner face comprises:
extracting the central point of the designated washbner surface, and determining the vertical direction of the designated washbner surface as a target direction;
and determining all target washbsers surfaces included in a first preset distance from the center point as the target washbser surfaces associated with the specified washbser surfaces by taking the target direction as a reference.
5. The method of claim 4, wherein the step of determining all target washbowl faces included within a first preset distance from the center point as the target washbowl faces associated with the designated washbowl face with the target direction as a reference comprises:
taking the target direction as a reference, extracting all target surfaces included in a first preset distance from the central point;
and for each target surface, extracting a target washbner surface meeting a preset area threshold, and determining the extracted target washbner surface as the target washbner surface associated with the specified washbner surface.
6. The method of claim 1, wherein the step of establishing a bolting relationship between the designated washbner face and the target washbner face according to a center distance between the designated washbner face and the target washbner face comprises:
determining, as a center distance value, a distance between a center point of the designated washbner face and a center point of the target washbner face for each target washbner face associated with the designated washbner face;
calculating the average value of the surface thickness value of the target washbner surface and the surface thickness value of the specified washbner surface to obtain a target thickness value; if the absolute value of the difference value of the central distance value minus the target thickness value meets a second preset distance, determining that the target washbner surface and the designated washbner surface have a connection relation;
storing the designated washbner surface and the target washbner surface with the connection relation into a preset list; and establishing bolt connection between the designated washbner surface and the target washbner surface.
7. The method of claim 6, wherein the step of bolting the specified washbner face to the target washbner face comprises:
connecting each node and a center point of the target washbner surface, and connecting each node and a center point of the designated washbner surface to obtain a plurality of hole radiuses;
extracting a minimum radius value for a plurality of the hole radii; and determining the type of the bolt according to the minimum radius value.
8. The method of claim 6, wherein if an absolute value of a difference between the center distance value minus the target thickness value satisfies a second preset distance, after determining that the target washbher face has a connection relationship with the designated washbher face, the method further comprises:
if the designated washbner surface and the target washbner surface which have the connection relation belong to a preset list, stopping executing the step of establishing bolt connection between the designated washbner surface and the target washbner surface; and for the next designated washbner face, continuing to execute the step of determining the target washbner face associated with the designated washbner face.
9. An apparatus for establishing a bolted connection, comprising:
the preprocessing module is used for acquiring a target model; preprocessing the target model to obtain an appointed washber surface of each bolt hole in the target model;
a determining module, configured to determine, for each of the designated washbsers, a target washbser surface associated with the designated washbser surface according to the surface thickness of the designated washbser surface;
and the connection module is used for establishing a bolt connection relation between the designated washber surface and the target washber surface according to the central distance between the designated washber surface and the target washber surface.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processing device, carries out the steps of the method of establishing a bolted connection according to any one of claims 1 to 8.
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| CN111581869B CN111581869B (en) | 2023-06-13 |
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| CN113127982A (en) * | 2021-05-14 | 2021-07-16 | 宝能(广州)汽车研究院有限公司 | Method and device for verifying rigidity of mounting hole, electronic equipment and storage medium |
| CN113704923A (en) * | 2021-09-01 | 2021-11-26 | 恒大新能源汽车投资控股集团有限公司 | Bolt model construction method and system, bolt connecting device and storage medium |
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|---|---|
| CN111581869B (en) | 2023-06-13 |
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