CN115270331A - Shock absorber support design method, terminal and computer readable storage medium - Google Patents
Shock absorber support design method, terminal and computer readable storage medium Download PDFInfo
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- CN115270331A CN115270331A CN202210887483.6A CN202210887483A CN115270331A CN 115270331 A CN115270331 A CN 115270331A CN 202210887483 A CN202210887483 A CN 202210887483A CN 115270331 A CN115270331 A CN 115270331A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
Abstract
The application provides a shock absorber support designing method, which comprises the following steps: generating an integral model of the shock absorber support according to the point cloud data of the first area in the shock absorber support; generating a local model of a second area in the shock absorber support according to a three-coordinate method; and obtaining a model of the shock absorber support according to the whole model and the local model. The shock absorber support design method has the advantages of low design cost, good finished product effect, short design period and the like.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a shock absorber support designing method, a shock absorber support designing terminal and a computer readable storage medium.
Background
Body in White (Body in White) refers to the Body structural and panel weld assembly, as defined by Body nomenclature standards and textbooks, and includes the front wing, doors, hood, trunk lid, but not the unpainted Body of accessories and trim. The coated white automobile body is provided with an inner decoration, an outer decoration (comprising an instrument board, a seat, windshield glass, a carpet, an inner decoration guard plate and the like), an electronic electrical system (comprising a sound box, a wire harness, a switch and the like), a chassis system (comprising a brake system, a suspension system and the like) and a power assembly system (comprising an engine, a gearbox and the like) to form the whole automobile.
The white body shock absorber support is used as a connecting part between a body and a frame, and plays an important role in light weight of the whole vehicle and reasonability of an internal structure of an engine compartment. As one of main parts in a white body engine compartment, a white body shock absorber support has important influence on the bearing capacity, the mechanical property, the comfort of a driver and the like. The design method of the existing white vehicle body shock absorber support comprises the following steps: according to the stress condition of the engine compartment, the size of wheels, the size of the engine compartment and other parameters, and in combination with original data of a company, a white vehicle body shock absorber support model is designed. And carrying out simulation analysis such as strength and rigidity check on the preliminarily designed model. And (4) judging whether the obtained result is satisfactory or not by combining the simulation result. If the result is satisfactory, the next step is carried out, otherwise, the steps are repeated. This high cost approach is acceptable for manufacturers with experience and associated parameters to be able to trial and error model design steps to arrive at an optimal design model. However, the research and the imitation of the body-in-white shock absorber support of the competitive vehicle are difficult for small manufacturers to carry out the steps, and only parameters can be obtained through direct physical measurement of the competitive size, and an initial model is constructed through reverse design. However, the body-in-white shock absorber support is a part which has a complex curved surface and is produced by a plurality of steel plates through different processes, and even if an initial model can be constructed through the method, a large amount of time and labor cost are required. Shortening the acquisition of the relevant parameters of body-in-white shock absorber mounts without raw design data is a formidable problem to be solved urgently for manufacturers who are required to control production cycles strictly.
The foregoing description is provided for general background information and does not necessarily constitute prior art.
Disclosure of Invention
In view of this, the invention provides a shock absorber support design method, a terminal and a computer readable storage medium, and has the advantages of low design cost, good finished product effect, short design period and the like.
The application provides a shock absorber support designing method, which comprises the following steps:
generating an integral model of the shock absorber support according to the point cloud data of the first area in the shock absorber support;
generating a local model of a second area in the shock absorber support according to a three-coordinate method;
and obtaining a model of the shock absorber support according to the whole model and the local model.
Optionally, the generating an integral model of the shock absorber mount from the point cloud data of the first region in the shock absorber mount comprises:
screening an area meeting preset conditions in the shock absorber support as a first area;
setting a mark point on the first area;
carrying out multi-angle scanning on the shock absorber support based on the mark point to obtain point cloud data according to a first area in the shock absorber support;
and importing and screening the point cloud data through preset software, and generating an integral model of the shock absorber support according to the screened point cloud data.
Optionally, the preset condition comprises at least one of:
the surface is smooth and conforms to a rectangular plane, a curved surface or a spherical surface with preset size;
the surface does not involve a welding process, a flanging process or a bending process;
a single steel plate involving only a drawing process;
only a single steel plate for the drawing process is involved and no curvature is generated on the surface of the steel plate.
Optionally, the generating a local model of a second region in the shock absorber mount according to a three-coordinate method includes:
determining an area which does not meet the preset condition in the shock absorber support as a second area;
measuring coordinate points of the second area by a contact-type three-coordinate measuring instrument;
classifying the coordinate points according to the physical attributes of the second region;
connecting the classified coordinates into curves, and connecting the curves to form a plurality of closed curved surfaces;
forming a local model of the second region from the plurality of closed surfaces.
Optionally, classifying the coordinate points according to the physical property of the second region includes:
and classifying the coordinate points according to the steel plates and/or positions of the coordinate points.
Optionally, the obtaining a model of the shock absorber support according to the overall model and the local model includes:
assembling the integral model and the partial model to form an initial model;
and adjusting the initial model according to the mechanical property of the shock absorber support and the size of the associated part to obtain the model of the shock absorber support.
Optionally, the assembling the integral model and the partial model to form an initial model comprises:
determining feature points corresponding to each other on the whole model and the local model;
respectively obtaining three-dimensional coordinate values of the feature points on the integral model and the local model to obtain a first coordinate value and a second coordinate value;
determining the relative position of the whole model and the local model according to the difference value of the first coordinate value and the second coordinate value;
and assembling the integral model and the local model according to the relative positions to obtain the initial model.
Optionally, after the method obtains the model of the shock absorber support according to the overall model and the partial model, the method further includes:
acquiring physical parameters of a model of the shock absorber support;
manufacturing a shock absorber support sample according to the physical parameters;
and testing the shock absorber support sample.
The present application further provides a terminal, including: the unmanned aerial vehicle path planning system comprises a memory and a processor, wherein the memory stores an unmanned aerial vehicle path planning program, and the unmanned aerial vehicle path planning program realizes the steps of the shock absorber support design method when being executed by the processor.
The present application further provides a computer readable storage medium having computer program instructions stored thereon; the computer program instructions, when executed by the processor, implement the shock absorber mount design method as described above.
In summary, the shock absorber support designing method, the terminal and the computer readable storage medium provided by the invention include: generating an integral model of the shock absorber support according to the point cloud data of the first area in the shock absorber support; generating a local model of a second area in the shock absorber support according to a three-coordinate method; and obtaining a model of the shock absorber support according to the whole model and the local model. The shock absorber support design method has the advantages of low design cost, good finished product effect, short design period and the like.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic flow chart illustrating a shock absorber mount designing method according to an embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.
First embodiment
As shown in fig. 1, an embodiment of the present invention provides a method for designing a shock absorber support, including:
And step 203, obtaining a model of the shock absorber support according to the whole model and the local model.
For the enterprises that are experienced, powerful and generally use software to design automobiles at present, the capability of reversely designing automobile part products is an indispensable capability. Typically, only one method is used to reverse design the model, such as reverse designing the product with CATIA through point cloud data or obtaining product parameters with a three-coordinate method. However, the design method has certain limitations, because the point cloud data obtained by attaching the mark points is used, only data in a certain area around the point can be obtained, and the generated model defaults that the whole part is a whole, the positions and the number of steel plates forming the part and the welding process among the steel plates cannot be reflected, and the model precision of a complex part is low; or a product is reversely designed by a three-coordinate method, common three-coordinate instruments in the market are divided into a contact type three-coordinate instrument and a non-contact type three-coordinate instrument, the non-contact type three-coordinate instrument mainly adopts optical measurement, but the price is generally higher, only a part of domestic laboratories have the instrument and use the method, and enterprises generally mainly adopt the contact type three-coordinate instrument. The contact type three-coordinate measuring instrument acquires coordinate data of a measuring point through a spherical measuring head at the front end, due to inherent limitation, a certain error exists in a measured result for a large arc or a large sector with more parts, the measuring time and the modeling time are longer, and the contact type three-coordinate measuring instrument can acquire data only by applying pressure to the measuring head, so that the thin steel plate is deformed, and the precision of a model is influenced.
In order to overcome the defects of the existing method, the application provides a shock absorber support design method, and an integral model is generated based on point cloud data mainly depending on the shock absorber support. For local parts which are not well collected by point cloud, local models generated by point cloud collection and parts which have larger access, relevant parameters of the local parts are measured by a Three-coordinate method, the local models of the shock absorber support are designed by Computer Aided Three-Dimensional Interface (CATIA) Application software, then the whole models and the local models are assembled together to form initial models, then the initial models are optimized according to self requirements to obtain final models, and the manufacturing requirements are met through tests, so that the shock absorber support can be produced and manufactured.
In one embodiment, generating an integral model of the shock absorber mount from the point cloud data of the first region in the shock absorber mount comprises:
screening an area meeting preset conditions in the shock absorber support as a first area;
setting a mark point on the first area;
carrying out multi-angle scanning on the shock absorber support based on the mark point to obtain point cloud data according to a first area in the shock absorber support;
and importing and screening the point cloud data through preset software, and generating an integral model of the shock absorber support according to the screened point cloud data.
In one embodiment, the preset conditions include at least one of:
the surface is smooth and conforms to a rectangular plane, a curved surface or a spherical surface with preset size;
the surface does not involve a welding process, a flanging process or a bending process;
a single steel plate involving only a drawing process;
only a single steel plate for the drawing process is involved and no curvature is generated on the surface of the steel plate.
In this embodiment, when generating the overall model of the damper mount, first, a simple surface patch mark point satisfying a preset condition is selected on the damper mount of the body-in-white of the target vehicle, and the condition satisfying the preset condition may be: the single steel plate is only subjected to a stretching process or has no curved surface in the stretching process, and the surface without welding parts with other steel plates is used as a simple surface, or the surface of the steel plate is smooth, is larger than 10cm and 10cm, has a large rectangular plane, has a circular arc radius larger than 5cm, has a large curved surface or a spherical surface, and is far away from the surface part adopting processes such as flanging, bending and the like and the mutual welding parts of the steel plate and the steel plates as far as possible. When the mark points are attached, the distance between different mark points is usually kept to be 10cm, and the three mark points are not in a straight line as much as possible. And then, selecting a proper scanning distance by a method of holding a three-dimensional scanner by hand, scanning the white vehicle body shock absorber support from multiple angles, and carrying out all-dimensional scanning by adjusting the direction of the scanner or changing the arrangement mode of the white vehicle body shock absorber support, thereby reducing random errors and obtaining integral point cloud data. And then selecting a point cloud processing mode in the shape design function of CATIA software, importing point cloud data, screening useless points in the point cloud data, and generating an integral model by using the residual effective point cloud data. Of course, in other embodiments, the integral body-in-white shock absorber support model can also be constructed by utilizing the point cloud data through UG (Unigraphics), 3D max and other software.
In one embodiment, generating a local model of a second region in the shock absorber mount according to a three-coordinate method comprises:
determining an area which does not meet preset conditions in the shock absorber support as a second area;
measuring coordinate points of the second area by a contact type three-coordinate measuring instrument;
classifying the coordinate points according to the physical attributes of the second region;
connecting the classified coordinates into curves, and connecting the curves to form a plurality of closed curved surfaces;
a local model of the second region is formed from the plurality of closed surfaces.
In one embodiment, classifying the coordinate points according to the physical property of the second region comprises:
and classifying the coordinate points according to the steel plates and/or positions of the coordinate points.
In this embodiment, when the local model of the damper mount is generated, the coordinates of the local portion of the damper mount, for example, a connection portion formed by lap welding or flanging welding of a plurality of steel plates, a complex curved surface connection portion, or the like that does not meet a predetermined condition, may be measured by the contact-type three-coordinate measuring apparatus based on a three-coordinate method. The more complicated the local part with the cambered surface in multiple dimensions, the more the number of points is taken, the higher the density degree is, the higher the drawn model accuracy is, and the smoother the generated curve and model are. And then, selecting a creative curved surface design mode in the CATIA, dividing the obtained coordinate data into different parts according to the modes of different steel plates or different parts, reducing the rework times and saving time during assembly, drawing points obtained by a three-coordinate method in an overall model diagram, and selecting a sample line function to connect the points on one line into a curve. And connecting the curves through a connecting curve or broken line command to form a closed surface, and generating a closed curved surface by using a filling instruction. The local model may also be generated by a command to bridge or multi-section surfaces to generate closed surfaces. Of course, in other embodiments, the body-in-white shock absorber mount local model can also be constructed by UG, 3D max and other software by using data generated by the three-coordinate measuring machine.
In one embodiment, the model of the shock absorber mount is obtained from a global model and a local model, comprising:
assembling the whole model and the partial model to form an initial model;
and adjusting the initial model according to the mechanical property of the shock absorber support and the size of the associated part to obtain the model of the shock absorber support.
In one embodiment, assembling the global model and the partial model to form the initial model comprises:
determining characteristic points corresponding to each other on the whole model and the local model;
respectively obtaining three-dimensional coordinate values of the feature points in the whole model and the local model to obtain a first coordinate value and a second coordinate value;
determining the relative positions of the whole model and the local model according to the difference value of the first coordinate value and the second coordinate value;
and assembling the whole model and the local model according to the relative positions to obtain an initial model.
In this embodiment, when the initial model of the damper mount is generated, the feature points corresponding to the entire model and the local model are respectively selected, and the three-dimensional coordinate values thereof are obtained by the three-coordinate method. And calculating the difference value of the three-dimensional coordinate values of the feature points of the two models, and determining the actual relative position of the whole model and the local model. And selecting an assembly mode of the CATIA, and assembling the model through a constraint command and an operation command in the mobile toolbar according to the positions determined by the whole model and the local model to generate an initial model. Of course, in other embodiments, the initial model may be generated by assembling the whole model and the partial model using UG, 3D max, and other software.
In one embodiment, after the method obtains the model of the shock absorber support according to the whole model and the partial model, the method further comprises the following steps:
acquiring physical parameters of a model of a shock absorber support;
manufacturing a shock absorber support sample according to physical parameters;
the shock absorber mount samples were tested.
In this embodiment, when the final model for manufacturing the shock absorber is generated, after the initial model diagram is generated, according to the actual size requirements of the shock absorber and the relevant parts such as the corresponding wheel and the like and the mechanical performance requirements such as the rigidity, the strength and the like of the part, on the premise of meeting the normal use, the initial model is adjusted and optimized in the directions including the external dimension, the structural arrangement and the like, including but not limited to adjusting the thickness, the welding mode, the plane dimension and the like of the steel plate, so as to obtain the final model of the white car body shock absorber support.
And then, various parameters for manufacturing the white car body shock absorber support can be quickly obtained through a CATIA (computer-graphics aided three-dimensional interactive application) measuring command, sample samples are manufactured according to certain production process requirements according to the parameters, and the manufactured samples are subjected to tests such as rigidity, mechanical impact and the like.
The beneficial effect of this application:
compared with the prior art, the method and the device make up the defects that when only point cloud is used for reversely designing the vehicle body parts, the precision of complex parts is low, and the welding relation and the position distribution among steel plates forming the parts cannot be reflected; and when only the three-coordinate method is used, the measurement and modeling time for large curved surfaces and large planes is long, and the accuracy of the model is influenced. The white body shock absorber support model can be quickly established by manufacturers only through operations such as point pasting and surveying and mapping on target products under the condition of lacking design parameters of the white body shock absorber support, time cost and production cost of model design are greatly reduced, accuracy of the model is improved, and requirements on design levels of a company database and technicians are low. By establishing the model of the body-in-white shock absorber support, manufacturers can obtain all required parameters of the body-in-white shock absorber support by CATIA software, quickly establish a product database of the manufacturers and support subsequent model optimization and finished product manufacturing.
The method for designing the shock absorber support comprises the following steps: generating an integral model of the shock absorber support according to the point cloud data of the first area in the shock absorber support; generating a local model of a second area in the shock absorber support according to a three-coordinate method; and obtaining a model of the shock absorber support according to the whole model and the local model. The shock absorber support design method has the advantages of low design cost, good finished product effect, short design period and the like.
The present application further provides a terminal, including: the unmanned aerial vehicle path planning system comprises a memory and a processor, wherein the memory stores an unmanned aerial vehicle path planning program, and the unmanned aerial vehicle path planning program realizes the steps of the shock absorber support design method when being executed by the processor.
The embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium is stored with computer program instructions; the computer program instructions, when executed by the processor, implement the shock absorber mount design method as described above.
The specific process of executing the above method steps in this embodiment is described in detail in the related description of the above embodiment, and is not described again here.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
In this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, which may include other elements not expressly listed in addition to those listed.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A shock absorber support design method is characterized by comprising the following steps:
generating an integral model of the shock absorber support according to the point cloud data of the first area in the shock absorber support;
generating a local model of a second area in the shock absorber support according to a three-coordinate method;
and obtaining a model of the shock absorber support according to the whole model and the local model.
2. The method of claim 1, wherein the generating an integral model of the shock absorber mount from the point cloud data of the first region in the shock absorber mount comprises:
screening an area meeting preset conditions in the shock absorber support as a first area;
setting a mark point on the first area;
carrying out multi-angle scanning on the shock absorber support based on the mark point to obtain point cloud data according to a first area in the shock absorber support;
and importing and screening the point cloud data through preset software, and generating an integral model of the shock absorber support according to the screened point cloud data.
3. The shock absorber mount designing method according to claim 2, wherein the preset condition includes at least one of:
the surface is smooth and conforms to a rectangular plane, a curved surface or a spherical surface with preset dimensions;
the surface does not involve a welding process, a flanging process or a bending process;
a single steel plate involving only a drawing process;
only a single steel plate for the drawing process is involved and no curvature is generated on the surface of the steel plate.
4. The method of claim 2, wherein said generating a local model of a second region in said shock absorber mount according to a three-coordinate method comprises:
determining an area which does not meet the preset condition in the shock absorber support as a second area;
measuring coordinate points of the second area by a contact type three-coordinate measuring instrument;
classifying the coordinate points according to the physical attributes of the second region;
connecting the classified coordinates into curves, and connecting the curves to form a plurality of closed curved surfaces;
forming a local model of the second region from the plurality of closed surfaces.
5. The shock absorber mount design method according to claim 4 wherein said classifying the coordinate points according to the physical property of the second region comprises:
and classifying the coordinate points according to the steel plates and/or positions of the coordinate points.
6. The shock absorber mount designing method according to claim 1, wherein said obtaining a model of the shock absorber mount from the whole model and the partial model includes:
assembling the integral model and the partial model to form an initial model;
and adjusting the initial model according to the mechanical property of the shock absorber support and the size of the associated part to obtain the model of the shock absorber support.
7. The shock absorber mount design method as set forth in claim 6 wherein said assembling the integral model and the partial model to form an initial model comprises:
determining feature points corresponding to each other on the overall model and the local model;
respectively obtaining three-dimensional coordinate values of the feature points on the integral model and the local model to obtain a first coordinate value and a second coordinate value;
determining the relative position of the whole model and the local model according to the difference value of the first coordinate value and the second coordinate value;
and assembling the integral model and the local model according to the relative positions to obtain the initial model.
8. The method of designing a shock absorber mount according to claim 1 or 5, further comprising, after obtaining a model of the shock absorber mount from the global model and the partial model:
acquiring physical parameters of a model of the shock absorber support;
manufacturing a shock absorber support sample according to the physical parameters;
and testing the shock absorber support sample.
9. A terminal, characterized in that the terminal comprises: memory, a processor, wherein the memory has stored thereon a drone path planning program that, when executed by the processor, implements the steps of the shock absorber mount design method of any of claims 1 to 8.
10. A computer readable storage medium having computer program instructions stored thereon; the computer readable storage medium when executed by a processor implements a shock absorber mount design method as recited in any of claims 1-8.
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| CN202210887483.6A CN115270331A (en) | 2022-07-26 | 2022-07-26 | Shock absorber support design method, terminal and computer readable storage medium |
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| CN202210887483.6A CN115270331A (en) | 2022-07-26 | 2022-07-26 | Shock absorber support design method, terminal and computer readable storage medium |
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