CN103020358A - Construction method of adaptive dynamic design platform aiming at mechanical device - Google Patents
Construction method of adaptive dynamic design platform aiming at mechanical device Download PDFInfo
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Abstract
The invention discloses a construction method of an adaptive dynamic design platform aiming at a mechanical device. The construction method mainly comprises the steps of: erecting an adaptive service platform suitable for a target mechanical device, performing tracking dynamic design on a target product, and performing variable optimization design on a target model machine; and erecting a PDM (product data management) service platform as a link of the innovative service integration platform to couple the adaptive service platform, the tracking dynamic design and the variable design into a whole. The construction method can be promoted in other design and manufacturing industries, the prevailing significant problems such as long cycle of design and production, instable design quality, large amount of repeated work of personnel and high cost can be solved, experience of design and manufacturing can be accumulated and repeatedly used, reconstruction and remanufacturing can be realized, waste of resources can be reduced, seamless integration of demand conversion, product design, analysis, simulation and manufacturing can be realized ultimately, the structure of the target product can be optimized, the performance of the target product can be stabilized, rapid transformation can be realized, and the core competitiveness of enterprises can be enhanced.
Description
Technical field
The present invention relates to a kind of construction method of dynamic design platform of mechanized equipment, particularly CAX/PDM integrated technique and adaptability design concept belong to mechanical engineering technical field.
Background technology
1. the research overview of physical construction dynamic design
Along with the fast development of this interdisciplinary study of mechanical kinetics, derived a kind of new design theoretical method for mechanized equipment---the mechanical dynamic design.The thirties in last century, the dynamic property of physical construction has just caused the attention of people's height.Along with the development of mode experiment technology, the appearance of mechanical impedance measuring technology and relevant analytical calculation software and hardware, the test of structural response function can realize.At the seventies of developed Fast Fourier Transform (FFT) and finite element analysis technology progressively, for mathematical theory modeling and the experiment dynamic modeling of physical construction are laid a good foundation.At the end of the eighties in last century, the mechanical dynamic design theory has obtained unprecedented development, is widely used in a plurality of fields, comprises that the key areas such as Aero-Space, communications and transportation, equipment manufacture have all become indispensable important step.Mechanical dynamic design is a very complicated Coupling Design process, not yet forms so far science, complete theoretical system, still is in the desk study stage.
Mechanical dynamic design based on mechanical kinetics mainly comprises three large support technologies: finite element technique, experimental modal technology, Optimal Structure Designing.The main process of physical construction dynamic design is: set up the kinetic model that adapts for target equipment mechanical dynamic performance, revise kinetic model, the Dynamic Performance Analysis of model and parameter identification are carried out parameter, structure, topological optimization based on certain optimum theory to the target mechanical system.The Dynamic Performance Analysis of engineering goods relates to many related disciplines, such as mechanical kinetics, rigid dynamics, many-body dynamics, vibration mechanics, experimental modal analysis is theoretical, finite element theory etc., select different analytical approachs that its structure dynamic is analyzed for different mechanized equipments, according to the dynamic property of target product product is done further optimization simultaneously, thereby guarantee and improve the working parameters of target mechanized equipment.
At present, the design of most domestic equipment Manufacturing, manufacturing means fall behind, simultaneously, the Dynamic Performance Analysis research of mechanized equipment also rests on the experimental verification stage of feedback character, seldom can at the beginning of product design, just introduce the Dynamic Performance Analysis proof procedure, greatly restrict the development of product quality.Step into 21 century, mechanized equipment is gradually to large and subminiaturized trend development, and how this guarantees that product has good dynamic property and become a key issue so that the design and manufacture cost of mechanized equipment product increases gradually.The present invention is in conjunction with the adaptable design theory, comprehensively planned the dynamic design flow process for the target mechanized equipment, the platform service system of researching and developing out can the fast responding market demand, and the dynamic authentication of the science of carrying out and optimization, effectively the combination property of hoisting device manufacturing enterprise production efficiency and product is improved the core competitiveness of enterprise.
2. based on the adaptability design concept of broad sense modularization idea
So-called adaptability refers to that main body adapts to the ability of objective condition and constraint variation; Adaptability is a main body can adapt to objective condition and constraint variation in tectonic system ability; Adaptivity is a kind of function that main body possesses, and when environment or constraint condition variation, main body can initiatively adapt to objective condition and constraint changes, thereby carries out normal activity.The final order of adaptable design is exactly to make the product of designing have adaptability.
Adaptable design is proposed by Canadian academician of the Chinese Academy of Engineering professor P.GU the earliest; whether successfully the purpose that he has taken the lead in discussing the adaptable design theory should only not be confined to enterprise; also should comprise the protection to resource environment, and adaptability is defined as the service of product and the extension of function.P.GU has proposed to adapt to the universal of product the earliest, and has pointed out three key elements of adaptable design: adaptability tolerance, functional independence and design procedure model function.P.GU uses the key concept method of adaptable design and engineering thereof and has carried out the discussion of system, and research is than the difference of right adaptable design and other design theories and contact.Wu Qinming etc. have studied the implementation procedure of product adaptability, comprise can adapt to modular design, can adapt to Platform Designing with can adapt to Interface design, and done comparatively detailed elaboration for the idiographic flow of every kind of method.
The core of adaptable design theory is parameter driven broad sense modularization idea.1850s, modular technology and modular design are come out first as technical term, different engineering fields are also different to its definition, it is generally acknowledged: for the multi-class product development with difference in functionality, do not need every kind of product is all designed separately, but establishment functional module, set up target product according to market, customer demand analysis by the combination corresponding module, thereby solve the contradictory relation between function, multi-size and production cycle, the cost, function modoularization design concept that Here it is.Y.ITO etc. have studied modular design concept the earliest, and by the analysis to the general structure of tandem product, they have proposed the concept of delamination modularization structure in 1979, and point out that for machine tool structure function modoularization has very important practical significance.They have proposed to utilize power stream and GT code to show to describe and create the tactic pattern of lathe.Shinno and Ito adopt the said structure pattern successfully to estimate the similarity of machine tool structure, and with degree, similarity and mutually unison concept are incorporated in the modular design jointly.It is domestic that the earliest modularity theory is studied is Jia Yanlin and Tong Shizhong, they have discussed modular basic concept and current situation in detail, system summary modular ultimate principle and method for designing, enumerated various Engineering Projects in order to deepen the Understanding Module design.Weak point for the traditional modular method for designing, professor Xu Yanshen of University Of Tianjin has furtherd investigate traditional theory of modular design, and the Generalized Modular Design theory proposed on this basis, it is not obvious successfully to have solved graded characteristics, and structure is difficult for the difficult problems such as modular design of standardization, seriation and general-purpose product.Generalized Modular Design can realize the modular design of nonstandard product by variable design and parametric technology.
In sum, existing many scholars have carried out deep discussion to adaptability design both at home and abroad, design theory and method as a kind of advanced person, adaptable design can be given full play to the advantage of modular design, product platform design, reconfigurable design, Parallel Design, make the at any time requirement of adapt to economic development, technology and environment of target product, the themes of the times of having agreed with current low-carbon environment-friendly, Green design.
But the engineering practice of adaptable design theory also is in the desk study stage with using, along with the develop rapidly of Science ﹠ Society and improving constantly of people's demand, adaptable design use in equipment manufacturing field will be further extensively, deeply.Many equipment Manufacturings still adopt the production model of single-piece customization to satisfy user and the market demand, and design reuse is few, and the separate unit cost is high, and the problems such as prolongation at delivery date are especially obvious.Therefore, the present invention is directed to the typical machine equipment Manufacturing and proposed pointed adapted to innovation service platform, and be coupled with the dynamic design theory is perfect, in the hope of realizing the Mass Customization Production Model of product, satisfy best properties of product requirement, and adapt to the individual demand of product.
3. the manufacturing current situation of mechanized equipment
The mechanized equipment manufacturing industry is the important substance basis of the national economic development, is the important embodiment of a national overall national strength.Although the total size of current China equipment manufacture has been positioned at prostatitis, the world, overall situation " strong greatly and not ", manufacturing enterprise's weak foundation particularly at information-based, the advanced aspects such as design optimization theory, is mainly manifested in:
(1) design means falls behind, and current many enterprises also rest on two dimensional drafting, even manual Graphics Mode; Traditional paper medium transmits, and information flowrate is low, and accuracy rate does not ensure more.
(2) design concept, design are outmoded, and the engineering of dynamic design theory is used and also is in the budding stage, and the engineering of Optimal Structure Theory is used does not have systematicness, and the designer fights separately, and cooperative ability, ability to cooperate are poor.
(3) although some enterprise has adopted computer-aided design (CAD), the data management means fall behind, and data security, sharing are poor, lack each other effective information sharing and utilization, cause " information island ".
(4) the equipment Manufacturing data class is various, data redundancy, retrieval difficulty.Data management is stiff, and task coordinate is poor, progress is out of control, and version management is chaotic, and multilayer is used hard to guard against.
In the manufacturing informatization technology, Design of digital emulation and digitalized production management are wherein very crucial and important core technologies.Towards the information-based integrated system of manufacturing CAX/PDM, provide advanced design means and design concept with the CAX technology, with the PDM management information data and shared platform is provided, and with PDM as integrated medium, process, function and the information coupling of CAX/PDM are in the same place informationization that can Effective Raise enterprise.
Summary of the invention
High precision, high-level efficiency, robotization, informationization and microminiaturization have become the development trend of Modern Manufacturing Technology, and be also more and more higher to the requirement of modern manufacturing equipment.The Design and optimization level of China's equipment manufacture product falls behind at present, and the dynamic design theory also is far from reaching the practical application stage, and on the other hand, most of enterprise still can not design premium quality product respond to the market demand fast in time.In order to improve the efficient of product dynamic performance index and design, on the basis of analyzing mechanical Structural Static, dynamic perfromance and Dynamic Design Principle, for above-mentioned prior art, the invention provides a kind of adaptability dynamic design platform construction method for mechanized equipment.Adaptability research and development based on CAX/PDM are key subjects of hoisting device manufacturing industry innovation ability, and the present invention can be widely used in the every field of equipment manufacture, comprise Aero-Space, automobile, engineering machinery, machine tool metallurgy, weaving etc.The invention provides a kind of common technology system of innovative design, method for designing is revised targetedly and is adjusted and can use for the product of different industries, and therefore, market is used wide.
In order to solve the problems of the technologies described above, the present invention is directed to the adaptability dynamic design platform construction method of mechanized equipment, may further comprise the steps:
Step 1: build the adapted to service platform that is applicable to the manufacturing of target mechanized equipment, comprising:
1-1. take market study as criterion, carry out the product segmentation according to the user for the difference requirement of product specification size, function, performance, thereby set up the customer demand model;
1-2. the target mechanized equipment is carried out product family planning, thereby obtains product family's type sets, and product family's type sets is expanded;
1-3. functional module is divided, model creation: the target mechanized equipment is carried out functional module divide; Then, functional module is carried out the CAD modeling, consider bad working environments, each functional module single-piece is carried out the quiet rigidity verification of CAE;
1-4 sets up flexible coded system: the characteristics of combining target mechanized equipment, and follow coding rule the product information of complexity is changed into the coding that is comprised of character, specification, technique, the function information of functional module is described;
1-5. set up product family modular structure storehouse, and set up accordingly the large class virtual prototype whole machine model of typical case;
So far, erect and to adapt to service platform, for the tracking dynamic design in next step is carried out the basis;
Step 2: target product is carried out the tracking dynamic design, comprising:
2-1. for the actual demand of specific client, the virtual prototype whole machine model is set up in the product family modular structure storehouse of putting up in the invocation step one, and carries out interference checking;
2-2. virtual prototype whole machine model CAE Analysis on Static Stiffness: verify whether its quiet stiffness parameters satisfies the actual functional capability requirement, if do not satisfy, then revise the virtual prototype whole machine model, if satisfy, enter next step;
2-3. virtual prototype whole machine model CAE performance analysis, motion analysis: by the CAE performance analysis, calculate the front 6 rank Mode Shape of virtual prototype whole machine model and corresponding model frequency; By motion analysis, the assembling scheme of checking virtual prototype whole machine model, and the speed of output key position, displacement, acceleration time curve;
2-4. the original model machine of client and each key structure are carried out Dynamic Modeling, consider the actual conditions of original model machine, adopt the excitation, the pick-up scheme that are applicable to the target model machine, arrange measuring point, carry out mode experiment, analyze experimental data, obtain front 6 first order modes and the corresponding frequency of actual model machine;
2-5. comparison virtual prototype whole machine model result of finite element and actual model machine mode experiment result, if coincide then enter next step, otherwise the correction finite element model, and return step 2-2;
Step 3: the target model machine is carried out the variable design optimal design, comprising:
3-1. variable design optimum: the virtual prototype whole machine model that obtains in the previous step is carried out the variable design analysis, key design parameter in the virtual prototype complete machine structure is as design variable, according to the impact of described design variable on structure static state or dynamic property, pass through FEM (finite element) calculation, sensitivity analysis and variable element analysis are revised finite element model and are obtained virtual prototype complete machine Optimized model;
3-2. Usability analysis and optimization: whether each key structure of checking virtual prototype whole machine model meets the manufacturability requirement of manufacturing and repairing aspect, whether adapt with working condition, by optimizing the virtual prototype whole machine model, guarantee that it has good processing, assembling possibility and economy;
3-3. produce actual model machine, experimental verification: on the basis of above-mentioned variable design analysis and Usability analysis, the manufacture order bench teat is tested model machine and is carried out key structure experiment of dynamic balancing and actual motion response experiment, whether the checking model machine can satisfy predetermined functional performance requirement, if do not satisfy, return 3-1 or 3-2 modification model according to actual conditions;
If meet the demands, the customer demand model of then being set up in the step 1 is as criterion, carry out the verification of particular customer demand to optimizing model machine, if meet the verification standard, then obtain final optimization pass virtual prototype whole machine model, and deposit the main functional modules component in product family modular structure storehouse, and primary products family modular structure storehouse is replenished renewal, enter next step; Otherwise, revise finite element model, and return step 2-2;
3-4.CAM mass production: final optimization pass virtual prototype whole machine model is imported in the CAM software, transfer to numerically-controlled machine processing, realize mass production;
Also have, be coupled above-mentioned service platform, tracking dynamic design and the Variable Design of adapting to as a whole by building a PDM service platform; Described PDM service platform is used for management CAD and CAE data wherein, simultaneously, supports the real time execution of CAD and CAE; Above-mentioned CAD modeling, CAE Analysis on Static Stiffness, CAE performance analysis and the variable design process of optimization that relates in steps need not to transform form all based on the Solidworks2012 software desk Implementation, realizes the data transmission seamless link.
Further, the present invention is directed to the adaptability dynamic design platform construction method of mechanized equipment, wherein: among the step 1-2 product family's type sets expanded and comprise horizontal serial expanded and vertical serial expanded, horizontal serial expanded is the expansion to functional structure, and vertical serial expanded is the expansion to specification.
Key design parameter described in correction finite element model and the step 3-1 described in the step 2-5 is looked different mechanized equipment structures and is determined.
Plant equipment is the large-sized numerical control floor-type milling ﹠ boring machine, the column of this large-sized numerical control floor-type milling ﹠ boring machine quiet, the dynamic parameter index is very large to the machine tooling performance impact, key design parameter is arrange density, thickness and height parameter of the inner transverse and longitudinal gusset of column, revises finite element model and namely these key design parameters is dispersed value to obtain optimum solution.
Compared with prior art, the invention has the beneficial effects as follows:
Towards the integrated manufacturing platform of the CAX/PDM of equipment manufacture product take the adaptability theory as design basis, adopt modularization, standardization, seriation, virtual method to carry out the research and development of new product, so can strengthen the product customizability, fast response user's request realizes the optimization utilization of resource and the energy.
Enterprise all can clearly monitor and hold exactly from product development overall processes such as the product modular rapid configuration of accepting an order, Variant Design, digitizing pre-assembled, digital assay and optimizations, can take full advantage of three-dimensional mathematical model and carry out the design of product, assessment, modification and optimization.Adopt virtual prototype to replace as much as possible model machine in kind to test, simulation calculation under digital state, and then former design re-started combination or improve, therefore, substantially can make new product development obtain once success.Enterprise can make fast client's changes in demand, flexibly reaction, and time fully according to the rules, cost and quality requirements are introduced product to the market demand rapidly.Products Digital model and information, design data and design resource can not only be shared between business enterprice sector and reuse, and are convenient to again from now on digitizing manufacturing of enterprise and management, are CAM, CAPP, comprehensive integrated the laying the first stone of ERP information.
Integrated application adaptable design technology of the present invention, the multinomial advanced technologies such as Modern Design Technology, digitizing technique and infotech are carried out the data management of Product Requirement Analysis, rapid configuration, finite element analysis, Optimal Structure Designing and total life cycle oriented to product development process.Simultaneously, the present invention can be applied to other and manufacture and design industry, and it is long to solve the ubiquitous design cycle, and designing quality is unstable, designer's duplication of labour amount is large, production cycle is long, and the high in cost of production outstanding problem can accumulate the design reuse manufacturing experience, realize restructural, make again, reduce the wasting of resources, outstanding low-carbon environment-friendly has good social benefit.
The present invention's expection is finished target and is designed with manufacturing cost more than 20% for shortening the product design cycle more than 50%, reducing, and conscientiously promotes the quality and performance of target mechanized equipment product.
Description of drawings
Fig. 1 is the overview flow chart that the present invention is based on the mechanized equipment adaptability dynamic design platform of CAX/PDM;
Fig. 2 is generalization functional module matrix planning process synoptic diagram among the present invention;
Fig. 3 is embodiment of the invention Machine Tool Enterprises lathe module type series coded representation intention;
Fig. 4 is the front 6 rank Mode Shape result of finite element synoptic diagram of embodiment of the invention complete machine.
Embodiment
Below in conjunction with accompanying drawing, further describe the embodiment of the construction method of adaptability dynamic design platform of the present invention, and the specific tasks that will finish of each key step and the relation between them.
Technical solution of the present invention mainly comprises three large flow processs: can adapt to service platform and create, based on the tracking dynamic design of mechanical kinetics, based on the target model machine is carried out the variable design optimal design.Especially, build the PDM server data message of integral platform is carried out scientific management and control, this PDM server is the tie that each several part connects communication.
As shown in Figure 1, a kind of adaptability dynamic design platform construction method for mechanized equipment of the present invention may further comprise the steps:
Step 1: build the adapted to service platform that is applicable to the manufacturing of target mechanized equipment, comprising:
1-1. take market study as criterion, carry out the product segmentation according to the user for the difference requirement of product specification size, function, performance, thereby set up the customer demand model; Namely, the target industry field is carried out demand analysis, before developing new product, enterprise at first will carry out demand to particular user and carry out, the user here considers from angle of statistics, the purpose of different user required product, environment and expectation are also different, by the market segments and product segmentation, make up vertical target machinery manufacturing equipment demand model.
1-2. on the basis of demand analysis, the target mechanized equipment is carried out product family planning, thereby obtain product family's type sets, and product family's type sets expanded, product family's type sets expanded comprise horizontal serial expanded and vertical serial expanded, horizontal serial expanded is the expansion to functional structure, and vertical serial expanded is the expansion to specification.Fig. 2. be the functional module matrix planning process synoptic diagram of generalization.
1-3. module is divided in the product-based functional analysis, at first then the general function of analytic product successively decomposes and refinement it.Each main modular and sub-module are carried out the CAD modeling, each primary structure single-piece is carried out the quiet rigidity verification of CAE, consider the peak load operating mode.
1-4. the characteristics according to the target mechanized equipment, follow coding rule the product information of complexity is changed into the coding that is comprised of character, formulation is applicable to this flexible coded system that can adapt to service platform, and specification, technique, the function information of functional module is described; The essence of modularization coding is to replace tediously long character narrate with unified character code name, clear hierarchical relationship and the compound concept of explaining accurately large amount of complex, and coding can hold diversified element, polysemy statement and nonstandardized technique level; Fig. 3 is practical application Machine Tool Enterprises module type series coding schedule example.
1-5. set up product family modular structure storehouse, and set up accordingly the large class virtual prototype whole machine model of typical case; On the basis of the above work, the general frame of finally finishing target domain product family modular structure storehouse is built.Set up adaptability virtual prototype module system storehouse, for next step tracking dynamic design is laid a solid foundation.
Step 2: target product is carried out the tracking dynamic design, adopt the analytical approach of finite element method, mode experiment method, dynamic-analysis method triplicity that the target mechanized equipment is carried out Dynamic Performance Analysis.Especially, the product family modular structure storehouse that the above part in this part is set up is the design basis platform, and the demand analysis at the beginning of the design of combining closely responds and verify function, the performance requirement of market, user's request and product, i.e. the tracking dynamic design at any time.Comprise:
2-1. for the actual demand of specific client, the virtual prototype whole machine model is set up in the product family modular structure storehouse of putting up in the invocation step one, and the complete machine virtual prototype carries out interference checking,
2-2. virtual prototype whole machine model CAE Analysis on Static Stiffness: verify whether its quiet stiffness parameters satisfies the actual functional capability requirement, if do not satisfy, then revise the virtual prototype whole machine model, if satisfy, enter next step;
2-3. virtual prototype whole machine model CAE performance analysis, motion analysis: by the CAE performance analysis, adopt experimental modal analysis method that original model machine and each primary structure are carried out mode experiment, calculate the front 6 rank Mode Shape of virtual prototype whole machine model and corresponding model frequency; By motion analysis, the assembling scheme of checking virtual prototype whole machine model, and the speed of output key position, displacement, acceleration time curve, Fig. 4 are the Finite Dynamic Element result of calculation of a Machine Tool Enterprises complete machine tool.
2-4. the original model machine of client and each key structure are carried out Dynamic Modeling, consider the actual conditions of original model machine, adopt the excitation, the pick-up scheme that are applicable to the target model machine, arrange measuring point, carry out mode experiment, analyze experimental data, obtain front 6 first order modes and the corresponding frequency of actual model machine;
2-5. comparison virtual prototype whole machine model result of finite element and actual model machine mode experiment result find out error between the two, the generation reason of analytical error is revised finite element model, draws correct finite element result; If coincide then enter next step, otherwise revise finite element model (revise finite element model look different mechanized equipment structures and determine), and return step 2-2;
Step 3: the target model machine is carried out the variable design optimal design, engineering goods are carried out the mechanical structure specificity analysis and optimal design is one of chief component of whole product design process, comprising:
3-1. variable design optimum: the virtual prototype whole machine model that obtains in the previous step is carried out the variable design analysis, key design parameter in the virtual prototype complete machine structure is as design variable, according to the impact of described design variable on structure static state or dynamic property, when studying these design variables and changing according to certain rule within the specific limits, structure is static, the situation of change of dynamic performance parameter, pass through FEM (finite element) calculation, sensitivity analysis and variable element analysis are revised finite element model and are obtained virtual prototype complete machine Optimized model; Described key design parameter is looked different mechanized equipment structures and is determined, for example: plant equipment is the large-sized numerical control floor-type milling ﹠ boring machine, the column of this large-sized numerical control floor-type milling ﹠ boring machine quiet, the dynamic parameter index is very large to the machine tooling performance impact, key design parameter is arrange density, thickness and height parameter of the inner transverse and longitudinal gusset of column, revises finite element model and namely these key design parameters is dispersed value to obtain optimum solution.
3-2. Usability analysis and optimization: whether each key structure of checking virtual prototype whole machine model meets the manufacturability requirement of manufacturing and repairing aspect, verify whether large of each primary structure meets the manufacturability requirement of manufacturing and repairing aspect, whether the target model machine adapts with working condition, by optimizing the virtual prototype whole machine model, guarantee that it has good processing, assembling possibility, convenience, accuracy and economy;
3-3. produce actual model machine, experimental verification: on the basis of above-mentioned variable design analysis and Usability analysis, the manufacture order bench teat is tested model machine and is carried out key structure experiment of dynamic balancing and actual motion response experiment, whether the checking model machine can satisfy predetermined functional performance requirement, if do not satisfy, return 3-1 or 3-2 modification model according to actual conditions; If meet the demands, the customer demand model of then being set up in the step 1 is as criterion, carry out the verification of particular customer demand to optimizing model machine, if meet the verification standard, then obtain final optimization pass virtual prototype whole machine model, and deposit the main functional modules component in product family modular structure storehouse, and primary products family modular structure storehouse is replenished renewal, enter next step; Otherwise, revise finite element model, and return step 2-2;
3-4.CAM mass production: final optimization pass virtual prototype whole machine model is imported in the CAM software, transfer to numerically-controlled machine processing, realize mass production;
The present invention adopts PDM service platform information integration mechanism, and by building a PDM service platform, to adapt to service platform, tracking dynamic design and Variable Design coupling as a whole with above-mentioned as the tie of the innovation service integration platform; Described PDM service platform is not only managed the data of CAD and CAE system, and cooperative working environment is provided, but also will support the real time execution of CAD and CAE.Especially, the PDM server that the present invention erects also needs can adapting to the demand analysis of platform, product coding, and product family carries out scientific planning and management in the modular structure storehouse.Assembly relation between two-dimentional drawing, three-dimensional model, parts base attribute, production schedule and the product component that CAD system produces etc. need to be managed by the PDM system, and CAD system need to be obtained the information such as statement of design task, technical requirement parameter and part diagram paper matrix type from the PDM system simultaneously.In the CAE system, no matter be single part or the motion analysis of the finite element analysis of complete machine and mechanism, all need from the PDM system, to obtain the information such as the information of CAD system functional block model and assembling model and starting material information, and the result of cae analysis can reflect in the CAD system being modified in of model, and will analyze the file that produces and transfer to the PDM management.
Build the PDM service platform, comprising:
4-1. integrated platform in the middle of making up.Integrated platform can be realized XML file management, user management, adapter management, security mechanism, message mechanism, log management, protocol extension, mapping configuration etc. in the middle of making up, science log recording and Message Processing, management XML file, and the adapter of different CAX system carried out safety verification and management.
4-2. make up PDM second development system platform.Second development interface API and the VB.NET powerful by SolidWorks Enterprise PDM support, make up PDM second-time development service platform, this platform provides a kind of mechanism of secure access data for the user, and in the situation of not considering data or user's physical location, allow the user to data and the transparent access of information realization of enterprise product; Realize product structure and configuration management, Workflow Management, project management, and classification and search function are provided.Based on the COM/OLE technology, SolidWorks Enterprise PDM provides powerful second development interface API, can carry out some row associative operations to object by the API that calls PDM.When in VB.NET, carrying out secondary development, need to comprise class library file PDMWorks Enterpri se ' the s TypeLibrary of API object.
4-3. set up the PDM database server, the PDM ftp server.The PDM database server can conveniently be implemented in memory attribute data in the PDM system.The PDM ftp server is mainly stored the design documentations such as drawing and document relevant with product, and the CAX/PDM system uploads to the XML document of middle integrated platform.
Among the present invention the CAD modeling, CAE Analysis on Static Stiffness, CAE performance analysis and the variable design process of optimization that relate in steps all based on the Solidworks2012 software desk Implementation, need not to transform form, realize the data transmission seamless link.
Although top invention has been described in conjunction with figure; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; in the situation that does not break away from aim of the present invention, can also make a lot of distortion, these all belong within the protection of the present invention.
Claims (4)
1. the adaptability dynamic design platform construction method for mechanized equipment is characterized in that, may further comprise the steps:
Step 1: build the adapted to service platform that is applicable to the manufacturing of target mechanized equipment, comprising:
1-1. take market study as criterion, carry out the product segmentation according to the user for the difference requirement of product specification size, function, performance, thereby set up the customer demand model;
1-2. the target mechanized equipment is carried out product family planning, thereby obtains product family's type sets, and product family's type sets is expanded;
1-3. functional module is divided, model creation: the target mechanized equipment is carried out functional module divide; Then, functional module is carried out the CAD modeling, consider bad working environments, each functional module single-piece is carried out the quiet rigidity verification of CAE;
1-4 sets up flexible coded system: the characteristics of combining target mechanized equipment, and follow coding rule the product information of complexity is changed into the coding that is comprised of character, specification, technique, the function information of functional module is described;
1-5. set up product family modular structure storehouse, and set up accordingly the large class virtual prototype whole machine model of typical case;
So far, erect and to adapt to service platform, for the tracking dynamic design in next step is carried out the basis;
Step 2: target product is carried out the tracking dynamic design, comprising:
2-1. for the actual demand of specific client, the virtual prototype whole machine model is set up in the product family modular structure storehouse of putting up in the invocation step one, and carries out interference checking;
2-2. virtual prototype whole machine model CAE Analysis on Static Stiffness: verify whether its quiet stiffness parameters satisfies the actual functional capability requirement, if do not satisfy, then revise the virtual prototype whole machine model, if satisfy, enter next step;
2-3. virtual prototype whole machine model CAE performance analysis, motion analysis: by the CAE performance analysis, calculate the front 6 rank Mode Shape of virtual prototype whole machine model and corresponding model frequency; By motion analysis, the assembling scheme of checking virtual prototype whole machine model, and the speed of output key position, displacement, acceleration time curve;
2-4. the original model machine of client and each key structure are carried out Dynamic Modeling, consider the actual conditions of original model machine, adopt the excitation, the pick-up scheme that are applicable to the target model machine, arrange measuring point, carry out mode experiment, analyze experimental data, obtain front 6 first order modes and the corresponding frequency of actual model machine;
2-5. comparison virtual prototype whole machine model result of finite element and actual model machine mode experiment result, if coincide then enter next step, otherwise the correction finite element model, and return step 2-2;
Step 3: the target model machine is carried out the variable design optimal design, comprising:
3-1. variable design optimum: the virtual prototype whole machine model that obtains in the previous step is carried out the variable design analysis, key design parameter in the virtual prototype complete machine structure is as design variable, according to the impact of described design variable on structure static state or dynamic property, pass through FEM (finite element) calculation, sensitivity analysis and variable element analysis are revised finite element model and are obtained virtual prototype complete machine Optimized model;
3-2. Usability analysis and optimization: whether each key structure of checking virtual prototype whole machine model meets the manufacturability requirement of manufacturing and repairing aspect, whether adapt with working condition, by optimizing the virtual prototype whole machine model, guarantee that it has good processing, assembling possibility and economy;
3-3. produce actual model machine, experimental verification: on the basis of above-mentioned variable design analysis and Usability analysis, the manufacture order bench teat is tested model machine and is carried out key structure experiment of dynamic balancing and actual motion response experiment, whether the checking model machine can satisfy predetermined functional performance requirement, if do not satisfy, return 3-1 or 3-2 modification model according to actual conditions;
If meet the demands, the customer demand model of then being set up in the step 1 is as criterion, carry out the verification of particular customer demand to optimizing model machine, if meet the verification standard, then obtain final optimization pass virtual prototype whole machine model, and deposit the main functional modules component in product family modular structure storehouse, and primary products family modular structure storehouse is replenished renewal, enter next step; Otherwise, revise finite element model, and return step 2-2;
3-4.CAM mass production: final optimization pass virtual prototype whole machine model is imported in the CAM software, transfer to numerically-controlled machine processing, realize mass production;
Also have, be coupled above-mentioned service platform, tracking dynamic design and the Variable Design of adapting to as a whole by building a PDM service platform; Described PDM service platform is used for management CAD and CAE data wherein, simultaneously, supports the real time execution of CAD and CAE; Above-mentioned CAD modeling, CAE Analysis on Static Stiffness, CAE performance analysis and the variable design process of optimization that relates in steps need not to transform form all based on the Solidworks2012 software desk Implementation, realizes the data transmission seamless link.
2. described a kind of adaptability dynamic design platform construction method for mechanized equipment according to claim 1, it is characterized in that: among the step 1-2 product family's type sets expanded and comprise horizontal serial expanded and vertical serial expanded, horizontal serial expanded is the expansion to functional structure, and vertical serial expanded is the expansion to specification.
3. described a kind of adaptability dynamic design platform construction method for mechanized equipment according to claim 1 is characterized in that: revise key design parameter described in finite element model and the step 3-1 described in the step 2-5 and look different mechanized equipment structures and determine.
4. described a kind of adaptability dynamic design platform construction method for mechanized equipment according to claim 3, it is characterized in that: plant equipment is the large-sized numerical control floor-type milling ﹠ boring machine, the column of this large-sized numerical control floor-type milling ﹠ boring machine quiet, the dynamic parameter index is very large to the machine tooling performance impact, key design parameter is arrange density, thickness and height parameter of the inner transverse and longitudinal gusset of column, revises finite element model and namely these key design parameters is dispersed value to obtain optimum solution.
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