CN111581869B - 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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- CN111581869B CN111581869B CN202010471265.5A CN202010471265A CN111581869B CN 111581869 B CN111581869 B CN 111581869B CN 202010471265 A CN202010471265 A CN 202010471265A CN 111581869 B CN111581869 B CN 111581869B
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Abstract
The invention provides a method, a device and a storage medium for establishing bolt connection, which are used for preprocessing a target model through simulation software to obtain appointed washer surfaces of bolt holes in the target model; for each designated washer face, determining a target washer face associated with the designated washer face according to the face thickness of the designated washer face; and establishing a bolt connection relation between the designated washer surface and the target washer surface according to the center distance between the designated washer surface and the target washer surface. In the mode, the positions of the bolt holes in the target model do not need to be manually judged, the bolt connection is automatically identified and established through simulation software, the grid processing of the entity bolts and the manual selection of the positions of the bolts are avoided, the calculation accuracy is ensured, the calculation amount is reduced, and the efficiency of establishing the bolt connection is improved.
Description
Technical Field
The present invention relates to the field of bolting technologies, and in particular, to a method, an apparatus, and a storage medium for establishing bolting.
Background
At present, the finite element simulation analysis means are increasingly applied to the automobile industry and guide the structural design of key components thereof. However, due to the complexity of the automobile part model, particularly the truck frame, hundreds or thousands of bolts are present with only one frame; existing methods of establishing bolted connections typically delete the original bolt solid model, replacing the bolted connection function by establishing beam units or rigid units. However, for larger models, under the condition that the number of bolts is large, a large number of bolts are connected, a simulation engineer is often required to utilize simulation software, a bolt connection relation is established by clicking and selecting each bolt hole in the model, different material properties are given according to different bolt models, a great deal of time is required for the engineer, and the efficiency is low.
Disclosure of Invention
In view of the above, the present invention is directed to a method, an apparatus and a storage medium for establishing a bolting, so as to improve the efficiency of establishing the bolting.
In a first aspect, an embodiment of the present invention provides a method for establishing a bolting, including: obtaining a target model; preprocessing the target model to obtain appointed washer surfaces of all bolt holes in the target model; for each designated washer face, determining a target washer face associated with the designated washer face according to the face thickness of the designated washer face; and establishing a bolt connection relation between the designated washer surface and the target washer surface according to the center distance between the designated washer surface and the target washer surface.
Further, the step of preprocessing the target model to obtain the designated washer surface of each bolt hole in the target model includes: performing extraction surface, wash processing, grid drawing and material attribute setting processing on the target model to obtain a processed target model; automatically hiding the entity of the processed 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 washer surface of each bolt hole in the target model according to the position information.
Further, after determining the designated washer plane of each bolt hole in the target model, the method further includes: and eliminating the designated washer surfaces which do not meet the preset area threshold for each designated washer surface.
Further, the step of determining the target washer surface associated with the specified washer surface according to the surface thickness of the specified washer surface includes: extracting a center point of a designated washer surface, and determining the vertical direction of the designated washer surface as a target direction; and determining all target washer surfaces included in a first preset distance from the central point by taking the target direction as a reference as target washer surfaces associated with the designated washer surfaces.
Further, the step of determining all the target washer planes included in the first preset distance from the center point as target washer planes associated with the designated washer planes based on the target direction includes: extracting all target surfaces included in a first preset distance from a center point by taking a target direction as a reference; and extracting target washer surfaces meeting a preset area threshold for each target surface, and determining the extracted target washer surfaces as target washer surfaces associated with the designated washer surfaces.
Further, the step of establishing a bolting relationship between the designated washer surface and the target washer surface according to the center distance between the designated washer surface and the target washer surface includes: determining the distance between the center point of the designated washer surface and the center point of the target washer surface as a center distance value for each target washer surface associated with the designated washer surface; calculating the average value of the face thickness value of the target washer face and the face thickness value of the appointed washer face 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 washer surface has a connection relation with the designated washer surface; storing the designated washer surface and the target washer surface with the connection relation into a preset list; and establishing bolt connection between the designated washer surface and the target washer surface.
Further, the step of establishing a bolting connection between the designated washer plane and the target washer plane includes: connecting each node of the target washer surface with a central point, and connecting each node of the designated washer surface with the central point to obtain a plurality of hole radiuses; extracting minimum radius values of a plurality of hole radii; and determining the type of the bolt according to the minimum radius value.
Further, if the absolute value of the difference value of the center distance value minus the target thickness value satisfies the second preset distance, after determining that the target washer surface has a connection relationship with the designated washer surface, the method further includes: if the designated washer surface and the target washer surface with the connection relationship belong to a preset list, stopping the step of establishing the bolt connection between the designated washer surface and the target washer surface; for the next designated washer plane, the step of determining the target washer plane associated with the designated washer plane continues.
In a second aspect, an embodiment of the present invention provides an apparatus for establishing a bolting connection, including: the preprocessing module is used for acquiring a target model; preprocessing the target model to obtain appointed washer surfaces of all bolt holes in the target model; the determining module is used for determining a target washer surface associated with each designated washer surface according to the surface thickness of the designated washer surface; and the connection module is used for establishing a bolt connection relation between the designated washer surface and the target washer surface according to the center distance between the designated washer surface and the target washer surface.
In a third aspect, embodiments of the present invention provide a computer readable storage medium having a computer program stored thereon, which when executed by a processing device performs the steps of the method of establishing a bolting according to any of the first aspects.
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, which are used for preprocessing a target model through simulation software to obtain appointed washer surfaces of bolt holes in the target model; for each designated washer face, determining a target washer face associated with the designated washer face according to the face thickness of the designated washer face; and establishing a bolt connection relation between the designated washer surface and the target washer surface according to the center distance between the designated washer surface and the target washer surface. In the mode, the positions of the bolt holes in the target model do not need to be manually judged, the bolt connection is automatically identified and established through simulation software, the grid processing of the entity bolts and the manual selection of the positions of the bolts are avoided, the calculation accuracy is ensured, the calculation amount is reduced, and the efficiency of establishing the 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 above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for establishing a bolting connection according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a finite element model with no bolting established according to an embodiment of the present invention;
FIG. 3 is a flowchart of another method for establishing a bolting according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a two-layer plate bolting model according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a method for creating a bolted finite element model 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
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, 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 embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
At present, the finite element simulation analysis means are increasingly applied to the automobile industry and guide the structural design of key components thereof. However, due to the complexity of the automobile part model, particularly the truck frame, hundreds or thousands of bolts are present with only one frame; in the existing method for establishing bolt connection, an original bolt solid model is usually deleted, and the contact relation of the bolt positions is established by dividing and processing bolt grids, so that great workload is brought, and the bolt connection function is basically replaced by establishing beam units or rigid units in the industry. However, a great deal of bolt connection often needs simulation engineers to use simulation software to establish a bolt connection relationship by clicking and selecting each bolt hole in a model, and meanwhile, different material properties are given according to different bolt types, so that a great deal of time is required for the engineers, 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 finite element simulation analysis functions. For the convenience of understanding the present embodiment, a method for establishing a bolt connection according to the present embodiment will be described in detail.
Embodiment one:
the embodiment provides a method for establishing bolt connection, which can be applied to various simulation software with finite element simulation analysis functions, such as hypermesh software; the hypermesh software has powerful finite element mesh division preprocessing function, comprises a preprocessing module, a solver module and a complete post-processing module, can directly input the 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, has high importing efficiency and model quality, and can greatly reduce a lot of repeated work, so that CAE (Computer Aided Engineering ) analysis engineers can put more effort and time into analysis and calculation. As shown in fig. 1, the method comprises the steps of:
step S102, obtaining a target model; preprocessing the target model to obtain appointed washer surfaces of all bolt holes in the target model;
the target model may be an existing finite element model, for example, an unexplored bolt-connected finite element model as shown in fig. 2; encrypting the grids around the bolt holes in the target model, and adding nodes of the grids to obtain the designated washer surface. Specifically, hypermesh software can be utilized, and TCL language is used for carrying out secondary development on hypermesh; firstly, inputting an established finite element model, namely the target model, into hypermesh software, opening the model, and then performing grid division, 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 washer face of each bolt hole can be identified by a neural network or other identification method.
Step S104, determining a target washer surface associated with each designated washer surface according to the surface thickness of the designated washer surface;
the number of the target washer surfaces can be one, two or more, and the target washer surfaces can be none; if the target washer surface associated with the specified washer surface is not determined according to the surface thickness of the specified washer surface, continuing to execute step S104, and determining the target washer surface associated with the specified washer surface according to the surface thickness of the specified washer surface for the next specified washer surface; if the target washer plane associated with the specified washer plane is determined according to the plane thickness of the specified washer plane, step S106 is continued.
The thickness of the specified washer surface can be obtained by extracting the thickness of the plate unit of the target model before pretreatment; the thickness value in the material property of the specified washer corresponding combs (component) can also be read; the target washer surfaces may be specific, and for each specified washer surface, a preset parameter may be set according to the nature of the actual target model and the surface thickness of the specified washer surface; searching all the surfaces included in a range meeting preset parameters in a specified direction of the specified washer surface by taking the specified washer surface as a reference, and determining all the found surfaces as target washer surfaces associated with the specified washer surface; the specified direction may be a vertical direction or other directions; the preset parameter may be a value obtained by multiplying 1.2 by the face thickness of the specified face, a value obtained by multiplying 1.5 by the face thickness of the specified face, a value obtained by multiplying 2 by the face thickness of the specified face, or the like.
And S106, establishing a bolt connection relation between the designated washer surface and the target washer surface according to the center distance between the designated washer surface and the target washer surface.
Specifically, for the specified washer surface, calculating the center distance between the specified washer surface and all target washer surfaces associated with the specified washer surface, and the surface thickness of the specified washer surface and the surface thickness of each target washer surface, and adding the surface thickness of the specified washer surface and the surface thickness of each target washer surface to obtain one or more surface thickness sums; and comparing the center distance with the sum of the thicknesses of the faces to determine the target thickness meeting the preset condition, establishing a bolt connection relation between the target washer face and the designated washer face, and replacing the bolt connection function by establishing a beam unit or a rigid unit. In addition, the sizes of the bolt holes corresponding to the two washer faces, which usually have a bolt connection relationship, are the same, and the types of the bolts can be determined according to the sizes of the bolt holes of the washer faces.
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 appointed washer surfaces of bolt holes in the target model; for each designated washer face, determining a target washer face associated with the designated washer face according to the face thickness of the designated washer face; and establishing a bolt connection relation between the designated washer surface and the target washer surface according to the center distance between the designated washer surface and the target washer surface. In the mode, the positions of the bolt holes in the target model do not need to be manually judged, the bolt connection is automatically identified and established through simulation software, the grid processing of the entity bolts and the manual selection of the positions of the bolts are avoided, the calculation accuracy is ensured, the calculation amount is reduced, and the efficiency of establishing the bolt connection is improved.
Embodiment two:
the present embodiment provides another method for establishing a bolting, which is implemented on the basis of the above embodiment, as shown in fig. 3, and includes the following steps:
step S302, performing extraction surface, wash processing, grid drawing and material attribute setting processing on the target model to obtain a processed target model;
according to the pumping surface processing, the pumping surface processing can be carried out on the target model by selecting proper parameters according to the pumping surface function of the simulation software; when grid processing is carried out on the target model, a washer unit needs to be arranged around the bolt hole, namely the washer processing can be carried out on the bolt hole of the target model after the extraction surface by selecting proper parameters according to the washer function of simulation software; the drawing grid generally performs drawing surface processing on the target model after drawing the middle surface or the target model after drawing the middle surface and the wasser processing by selecting proper grid size and other parameters according to the self drawing grid function of simulation software; the area of the surrounding grids is smaller and denser than that of other grids.
Step S304, automatically hiding the entity of the processed 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;
normally, a bolt hole processed by a washer is provided with a closed free edge with a longer length around, if the bolt hole exists in a display surface, the longer closed free edge exists in the surface, whether the length of the bolt hole meets a preset condition can be judged by identifying all the closed free edges contained in all the display surfaces, and if the length of the bolt hole meets the preset condition, the position of the closed free edge is determined to be the position of the bolt hole; the preset condition may be set according to a parameter selected during the process of the washer, for example, the radius of the washer unit of the bolt hole is set to be a during the process of the washer, and the preset condition may be that the length of the closed free edge is greater than or equal to the perimeter with the radius of a.
Step S308, determining the designated washer surface of each bolt hole in the target model according to the position information;
step S310, extracting a center point of a designated washer surface, and determining a vertical direction of the designated washer surface as a target direction;
the specific position of each designated washer surface can be determined according to the position information, and for each designated washer surface, the center point of the designated washer surface is extracted, and the vertical direction of the designated washer surface is determined as the target direction; specifically, according to the position information of the designated washer surface, extracting a center point of a bolt hole in the designated washer surface, and determining the vertical direction of the designated washer surface as a target direction by taking the center point as a circle center, wherein the target direction can be two vertical directions of the designated washer surface.
Step S312, determining all target washer surfaces included in a first preset distance from a central point as target washer surfaces associated with the designated washer surfaces by taking the target direction as a reference;
the first preset distance may be 1.5 times the face thickness value of the specified waver face; searching all target washer surfaces included in a first preset distance from a central point in two vertical directions of the designated washer surface, and determining the target washer surfaces as target washer surfaces associated with the designated washer surfaces.
Preferably, taking the target direction as a reference, extracting all target surfaces included in a first preset distance from the center point; and extracting target washer surfaces meeting a preset area threshold for each target surface, and determining the extracted target washer surfaces as target washer surfaces associated with the designated washer surfaces.
The preset area threshold may be determined according to the area of the designated washer surface, and after the washer processing is performed, the area of the designated washer surface where the bolt hole is located is smaller, so that the surface smaller than the preset area threshold in all the extracted target surfaces can be extracted, and the extracted target washer surface meeting the preset area threshold is determined as the target washer surface associated with the designated washer surface.
Step S314, determining the distance between the center point of the designated washer surface and the center point of the target washer surface as a center distance value for each target washer surface associated with the designated washer surface;
step S316, calculating the average value of the face thickness value of the target washer face and the face thickness value of the appointed washer face 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 washer surface has a connection relation with the designated washer surface;
the second preset distance may be set according to the nature of the target model itself, and is usually set to a value close to zero, but in order to compensate for the dimensional error of the target model itself, the second preset distance may be set to be slightly larger, and generally does not exceed the surface thickness, and this setting mode is better in model versatility.
Specifically, the center distance between each target washer surface associated with the designated washer surface and the designated washer surface is sequentially determined, if the absolute value of the center distance value minus the thickness value of the target surface is smaller than or equal to a second preset distance, the target washer surface and the designated washer surface, namely the surface where the bolt hole is located, can be determined, and the two washer surfaces have a connection relationship.
For example, the two-layer plate bolting model shown in fig. 4 shows that the middle plane of the plate a includes two circular areas A1 and A2, which can be understood as two designated washer planes, and the middle plane of the plate B includes three circular areas B1, B2 and B3, which can be understood as three target washer planes; t is t a To specify the face thickness of the waver face, t b For the face thickness of the target washer face, first, for the specified washer face A1, the average value (t a +t b ) 2, the target thickness value; as can be seen from fig. 3, the center distance of the target washer plane B1 and the specified washer plane A1 is equal to (t a +t b ) And/2, subtracting the absolute value of the difference value of the target thickness value from the center distance value, and meeting a second preset distance, wherein the two waver surfaces A1 and B1 have a connection relationship.
For the specified washer plane A2, the average value (t a +t b ) 2, the target thickness value; as can be seen from fig. 3, the center distance of the target washer plane B1 and the specified washer plane A1 is greater than (t a +t b ) And/2, namely the absolute value of the difference value of the central distance value minus the target thickness value, does not satisfy the second preset distance, and the two waver surfaces A2 and B1 have no connection relationship.
Step S318, storing the designated washer plane and the target washer plane with the connection relation in a preset list; and establishing bolt connection between the designated washer surface and the target washer surface.
The preset list is empty in the initial state; specifically, the designated washer surface with the connection relation and the target washer surface are bound with the nodes on the two surfaces respectively with the center nodes of the surfaces, and a beam unit or a rigid unit is built, so that bolt connection is built between the designated washer surface with the connection relation and the target washer surface.
Preferably, each node of the target washer surface is connected with the central point, and each node of the designated washer surface is connected with the central point to obtain a plurality of hole radii; extracting minimum radius values of a plurality of hole radii; and determining the type of the bolt according to the minimum radius value.
And on the basis of the calculated minimum radius value, according to the type of an actual target model, the line segments for connecting all the nodes and the center points of the target washer surface and the line segments for connecting all the nodes and the center points of the designated washer surface are endowed with the beam material attribute.
Further, if the absolute value of the difference value of the center distance value minus the target thickness value satisfies a second preset distance, after determining that the target washer surface has a connection relationship with the designated washer surface, the method further includes: if the designated washer surface and the target washer surface with the connection relationship belong to a preset list, stopping the step of establishing the bolt connection between the designated washer surface and the target washer surface; for the next designated washer plane, the step of determining the target washer plane associated with the designated washer plane continues.
Specifically, for all designated washer planes in the target model, a circulation mode is utilized, firstly, for one designated washer plane, a target washer plane associated with the designated washer plane is determined, and if the target washer plane exists, the target washer plane with a connection relation with the designated washer plane is determined; and then judging whether the designated washer surface and the target washer surface with the connection relationship belong to a preset list, comparing the designated washer surface and the target washer surface with the connection relationship with the designated washer surface and the target washer surface with the connection relationship stored in the preset list, returning to the step S104 if the designated washer surface with the connection relationship already exists, and continuously executing the step of determining the target washer surface associated with the designated washer surface aiming at the next designated washer surface. The mode can avoid repeatedly establishing the bolted connection at the same position, for example, a finite element model after the bolted connection is established as shown in fig. 5, 2 beam units can be generated finally for 3 layers, 3 beam units can be generated for 4 layers, 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 behind the pumping surface; the mode can automatically identify the bolt holes of the target model by one key and establish the bolt hole connection of the finite element 2-dimensional grid model without judging and manually selecting the bolt holes. And the material section attribute corresponding to the bolt beam unit can be automatically endowed according to the acquired hole size through the secondary development program; the bolting of the multi-layer board can be realized, and the number of layers is not limited; the expression form is that a beam unit is established between two plates to replace bolt connection, and n-1 bolt connection is established between n layers of plates; the grid processing of the entity bolts and the manual selection of the bolt positions are avoided, the calculation accuracy is ensured, the calculation amount is greatly reduced, and the simulation analysis efficiency is improved.
Embodiment III:
corresponding to the above method embodiment, the embodiment of the present invention provides a device for establishing a bolting, as shown in fig. 6, which includes:
a preprocessing module 61, configured to acquire a target model; preprocessing the target model to obtain appointed washer surfaces of all bolt holes in the target model;
a determining module 62, configured to determine, for each designated washer plane, a target washer plane associated with the designated washer plane according to a plane thickness of the designated washer plane;
and the connection module 63 is configured to establish a bolt connection relationship between the designated washer surface and the target washer surface according to the center distance between the designated washer surface and the target washer surface.
The embodiment of the invention provides a device for establishing bolt connection, which is used for preprocessing a target model through simulation software to obtain appointed washer surfaces of bolt holes in the target model; for each designated washer face, determining a target washer face associated with the designated washer face according to the face thickness of the designated washer face; and establishing a bolt connection relation between the designated washer surface and the target washer surface according to the center distance between the designated washer surface and the target washer surface. In the mode, the positions of the bolt holes in the target model do not need to be manually judged, the bolt connection is automatically identified and established through simulation software, the grid processing of the entity bolts and the manual selection of the positions of the bolts are avoided, the calculation accuracy is ensured, the calculation amount is reduced, and the efficiency of establishing the bolt connection is improved.
Further, the preprocessing module is further configured to: performing extraction surface, wash processing, grid drawing and material attribute setting processing on the target model to obtain a processed target model; automatically hiding the entity of the processed 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 washer surface of each bolt hole in the target model according to the position information.
Further, the device is also used for: and eliminating the designated washer surfaces which do not meet the preset area threshold for each designated washer surface.
Further, the determining module is further configured to: extracting a center point of a designated washer surface, and determining the vertical direction of the designated washer surface as a target direction; and determining all target washer surfaces included in a first preset distance from the central point by taking the target direction as a reference as target washer surfaces associated with the designated washer surfaces.
Further, the determining module is further configured to: extracting all target surfaces included in a first preset distance from a center point by taking a target direction as a reference; and extracting target washer surfaces meeting a preset area threshold for each target surface, and determining the extracted target washer surfaces as target washer surfaces associated with the designated washer surfaces.
Further, the above connection module is further configured to: determining the distance between the center point of the designated washer surface and the center point of the target washer surface as a center distance value for each target washer surface associated with the designated washer surface; calculating the average value of the face thickness value of the target washer face and the face thickness value of the appointed washer face 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 washer surface has a connection relation with the designated washer surface; storing the designated washer surface and the target washer surface with the connection relation into a preset list; and establishing bolt connection between the designated washer surface and the target washer surface.
Further, the above connection module is further configured to: connecting each node of the target washer surface with a central point, and connecting each node of the designated washer surface with the central point to obtain a plurality of hole radiuses; extracting minimum radius values of a plurality of hole radii; and determining the type of the bolt according to the minimum radius value.
Further, the device is also used for: if the designated washer surface and the target washer surface with the connection relationship belong to a preset list, stopping the step of establishing the bolt connection between the designated washer surface and the target washer surface; for the next designated washer plane, the step of determining the target washer plane associated with the designated washer plane continues.
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.
The embodiments of the present invention also provide a computer readable storage medium having a computer program stored thereon, which when executed by a processing device performs the steps of the method of establishing a bolting as described above.
The computer program product of the method, the apparatus and the storage medium for establishing the bolt connection provided by the embodiments of the present invention includes a computer readable storage medium storing program codes, and the instructions included in the program codes may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment and will not be repeated herein.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and apparatus may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood by those skilled in the art in specific cases.
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 this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform 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, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific 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: the above examples are only specific embodiments of the present invention for illustrating the technical solution of the present invention, but not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the foregoing examples, it will be understood by those skilled in the art that the present invention is not limited thereto: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (9)
1. A method of establishing a bolted connection, comprising:
obtaining a target model; preprocessing the target model to obtain appointed washer surfaces of all bolt holes in the target model;
for each designated washer face, determining a target washer face associated with the designated washer face according to the face thickness of the designated washer face;
establishing a bolt connection relation between the designated washer surface and the target washer surface according to the center distance between the designated washer surface and the target washer surface;
according to the center distance between the designated washer surface and the target washer surface, establishing a bolt connection relation between the designated washer surface and the target washer surface, wherein the method comprises the following steps:
determining the distance between the center point of the designated washer surface and the center point of the target washer surface as a center distance value for each target washer surface associated with the designated washer surface;
calculating the average value of the surface thickness value of the target washer surface and the surface thickness value of the appointed washer 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 washer surface and the appointed washer surface have a connection relation;
storing the designated washer surface and the target washer surface which have a connection relationship into a preset list; and establishing bolt connection between the designated washer surface and the target washer surface.
2. The method of claim 1, wherein the step of preprocessing the target model to obtain a designated washer face for each bolt hole in the target model comprises:
performing extraction surface, wash processing, grid drawing and material attribute setting processing on the target model to obtain a processed target model;
automatically hiding the entity of the processed 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 washer surface of each bolt hole in the target model according to the position information.
3. The method of claim 2, wherein after determining the assigned washer face for each bolt hole in the target model, the method further comprises:
and eliminating the designated washer surfaces which do not meet the preset area threshold for each designated washer surface.
4. The method of claim 1, wherein the step of determining a target washer face associated with the specified washer face based on the face thickness of the specified washer face comprises:
extracting a center point of the designated washer surface, and determining the vertical direction of the designated washer surface as a target direction;
and determining all target washer planes included in a first preset distance from the central point by taking the target direction as a reference as target washer planes associated with the designated washer planes.
5. The method of claim 4, wherein determining all target washer faces included within a first preset distance from the center point based on the target direction as target washer faces associated with the specified washer faces comprises:
extracting all target surfaces included in a first preset distance from the center point by taking the target direction as a reference;
and extracting target washer surfaces meeting a preset area threshold for each target surface, and determining the extracted target washer surfaces as target washer surfaces associated with the designated washer surfaces.
6. The method of claim 1, wherein the step of establishing a bolted connection for the designated washer face and the target washer face comprises:
connecting each node of the target washer surface with a central point, and connecting each node of the designated washer surface with the central point to obtain a plurality of hole radiuses;
extracting a plurality of minimum radius values of the hole radius; and determining the type of the bolt according to the minimum radius value.
7. The method of claim 1, wherein if the absolute value of the difference of the center distance value minus the target thickness value satisfies a second preset distance, after determining that the target washer face has a connection relationship with the designated washer face, the method further comprises:
if the designated washer surface and the target washer surface with the connection relationship belong to a preset list, stopping the step of establishing the bolted connection between the designated washer surface and the target washer surface; for the next designated washer plane, the step of determining the target washer plane associated with the designated washer plane continues.
8. An apparatus for establishing a bolted connection, comprising:
the preprocessing module is used for acquiring a target model; preprocessing the target model to obtain appointed washer surfaces of all bolt holes in the target model;
the determining module is used for determining a target washer surface associated with each designated washer surface according to the surface thickness of the designated washer surface;
the connection module is used for establishing a bolt connection relation between the appointed washer surface and the target washer surface according to the center distance between the appointed washer surface and the target washer surface;
the connection module is used for determining the distance between the center point of the designated washer surface and the center point of the target washer surface as a center distance value for each target washer surface associated with the designated washer surface; calculating the average value of the surface thickness value of the target washer surface and the surface thickness value of the appointed washer 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 washer surface and the appointed washer surface have a connection relation; storing the designated washer surface and the target washer surface which have a connection relationship into a preset list; and establishing bolt connection between the designated washer surface and the target washer surface.
9. A computer readable storage medium having stored thereon a computer program, characterized in that the computer program when run by a processing device performs the steps of the method of establishing a bolting according to any of the claims 1-7.
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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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