CAD is reached in modern project design fictitious the application in making

Fictitious design technology basically includes 1 product fictitious product is development platform, fictitious test, fictitious assemble and the fictitious design implementation of machine tool, mould, among them, what the Labview development platform that Tsinghua university uses firm of American state apparatus came true to lock up photograph circuit is fictitious; Mechanical and scientific academy uses C language and OpenGL to undertake process designing preliminary implementation stereo the parameter below the virtual reality that stops a garage changes a design, the position that has a garage OK and intuitionisticly, design, analysis and athletic imitate. 1.

Fictitious production technology basically includes 2 products process of imitate of material hot-working craft, treatment is emulated, plank shapes imitate, mould is made emulate etc. The board material that northing develops with OPllRIS with one steam shapes software is already basic can the car of the medium and complex degree of similar door enclothes imitate shape with other punch strike out process; The lathe of numerical control of double tool carrier that Hefei industry university develops machines process simulation software to had been in plant of tire of wheel of Inc. of saddle hill iron and steel to apply, make spot of numerical control program debugs time to shorten, assure to try cut a success; Institute of Beijing machine tool, mechanical scientific academy, northeast university, Shanghai is handed in learn the unit such as the courtyard to also develop those who gave a few this sides to emulate software with Changsha railroad greatly. 1.

Strategy of support of the architecture that 3 fictitious production systems basically incorporate fictitious production technology, technology, development, what put forward to compare mature thought and may come true among them is be the same as aid university by Shanghai the research center of different ground network that the system of dispersive network production that Professor Zhang Shu offers and academician of Xie Youbai of Xi'an traffic university establish. Can see from inside the treatise of above, study horizontal difference is bigger domestic and internationally, and because since of fictitious production technology is collateral,the development direction of the project is the core that makes adroitly, this decides we must regard the center of contemporary and compositive production system as the technology with it, undertake in order to drive what the research of relevant technology works, make they develop smoothly in coordination. The diagnostic mechanical design that 2 contemporary and mechanical engineerings design is to be implementation some to use a function, consider its motion possibility, production possibility, economy possibility at the same time, conceive the process of a kind of mechanical product that has certain innovation sex thereby. Traditional mechanical design technique suffers inferior equipment condition and backward technics place to be restricted, can fall in old-fashioned concept only, estimate even according to rough checking computations, finish machinist Cheng to design through simplify in great quantities and still changing hypothesis, accordingly it makes the design is put in optional sex necessarily, great to the dependence of the individual's experience and habit, extremely difficult implementation is reasonable, accurate with efficient design. Contemporary design technology made full use of maths of the computer technology that current and rapid development rises, computation technology, application and technology of mechanical, electronics, test and analysis, make design technology possible from experience, dormant with optional sex very big traditional design turns into be based on enumerated data, knowledge engineering or expert system, dynamic contemporary design, this need is collected adequately, analyse and retrieve necessary information, fast numeric operation and plan find actor, use CAD technology and artificial intelligence technology, database technology large-scaly to wait necessarily consequently. 3 fictitious make because the development of IT brought new lease of life to manufacturing industry,reach its characteristic, accordingly all sorts of new-style production technologies should carry and go out, among them, the most influential is the nimble production system of the personalized demand of contented client. Be being made adroitly is to be based on the fictitious production system that virtual reality technology and the combinative place of mechanical production technology produce, its benefit is emulated with the computer and virtual reality technology, on the computer imitate gives the whole lifecycle of the product, make from products plan, treatment namely, function analysis, production manages and attemper, the sale reachs after service to make comprehensive assessment, in order to add strong production process of each administrative levels decision-making with control ability. Fictitious make have fictitious sex, digitlization collect to be mixed into gender, distributinging sex rely on true make wait for character, the profit that fictitious production technology brings for manufacturing industry is self-evident. Below the circumstance that resource and energy are not wasting before this technology is produced, test and verify produces program: ① is aimed at actual process, build a model to be able to estimate manufacturing cost and cost reliably, deepen opposite to produce process and the understanding of production system and understanding; ② builds model and the application of emulation technology to be able to increase production greatly flexible, reduce fixed costs; ③ calculates cost, risk and rate of progress planned speed reliably, raise decision-making level greatly; ④ enhances the design ability of industry technology personnel, increase industry competition capacity. Be opposite domestic and internationally fictitious make already had much research, its model basically has 3 kinds: The fictitious production model that is a center in order to design, make in order to produce the fictitious production model that is a center and the fictitious production model that is a center in order to control, in the design of existing fictitious production system, the geometry in paying attention to virtual reality mostly builds desert, be based on diagnostic formative namely fictitious make, or use already software of some CAD ／ CAM undertake the CAD is mixed assist production way tectonic and fictitious production system. 4 products are different to the demand of CAD software function the enterprise because product structure, producer type and constituent management form are different, have diverse demand to the function of CAD software, from most enterprise to the application of CAD the case looks, its demand function has a few kinds as follows roughly: ① computer 2 dimension plot. "Throw drawing board " put brainpower from the solution in trival manual plot, it is the main goal that CAD application designs at the project, also be the basiccest function of CAD technology. ② computer assists craft to design (CAPP) . Manufacturing technology is an enterprise from the bridge that designs treatment, CAPP software should have technology design, craft to design norm of task management, material to provide the function such as the quantity, realize process standardization, assure to obtain the procedure of high quality, raise the efficiency that industry technology weaves and standardization. ③ three-dimensional design, assemble a design, curved surface design, ban gold is designed, finite yuan of design, orgnaization motion is emulated, note model analysis, the function of CAM of three-dimensional CAD ／ such as CNC Machining, the three-dimensional design that can solve an enterprise, fictitious design and assemble, gold of analysis of orgnaization motion analysis, stress meet an emergency, Ban spread out and discharge the problem such as appearance, make the enterprise moves toward true CAD design. ④ product data manages (PDM) . The design of complex product and development, want to consider products plan to develop a result not only, and the tubal amount that must consider products plan to develop a process and control, all data of lifecycle of product tubal an amount (include blueprint technology documentation) and the process that the product develops, the data that the system such as use CAD, CAPP, CAM realizes is shared, can make standardization of products plan job maintains consistency, the security that assures data of code of blueprint, process card, treatment, technology to wait. The application software of ⑤ enterprise. The enterprise is introducing 2 dimension or on the foundation of PDM of ／ of CAM of ／ of CAE of ／ of CAPP of three-dimensional CAD ／ , 2 development that the technical feature place that still is aimed at this enterprise has, be like Chinese change, the augment of library of construction of library of mark of emblem mark, industry, graph is waited a moment, some enterprises return the characteristic according to this company product, built an analysis, emulate optimize, the system of special or professional CAD such as cost analysis, mix CAD system is compositive, form the CAD system of this enterprise, this makes they are in products plan is primary, with respect to the structural characteristic that is able to understand a product and function, use the artificial intelligence technology such as academic design, experience design and expert system, the design blemish is eliminated in initiative phase. This makes CAD design results from traditional design prep above tradition is designed, move toward intelligent design finally. 5 fictitious production processes 5.

The model design of 1 fictitious design is fictitious the concept that making is the whole process that is based on product lifecycle. The to wanting to buy goods that offers to the client asks, design personnel undertakes analytic inducing after listening to client opinion adequately, understanding is clear about the function of the product, structure, function, have a product according to analytic result after design of fictitious design, fictitious treatment technology, fictitious production is machined, undertake fictitious assemble the emulation with the product, after affirming via the client next, undertake be productioned actually, till the client is satisfactory,amend design plan otherwise. Its process is shown 1 times like the graph. Graph what the process flow chart of 1 fictitious production treatment is a center with the design is fictitious production core mind is: Use make emulate will optimize products plan, can be opposite in design phase thereby the spare parts of a design and overall strength, stiffness, fatigue, stable, dynamic balance undertake integral performance optimizes a design, machine the craft analysis of the process, cast the thermodynamic analysis of the process, the kinematic analysis of athletic component, the producibility of kinetic analysis and parts is analysed, the person that machines a process, money, content optimizes combination, the rationality analysis that the system assembles, its core problem is fictitious design process build a model. Next, fictitious the production process that designs the job to should abide by artificial and actual design, accordingly, its design also should apply the design principle of top-down and bottom-up, can arrive from whole first local with the spare parts, also can arrive from ministry of spare parts standoff integral design. To realize the fictitious design of the product, the architecture that will design a model (design of the 2) that be like a graph is three-layer, differ according to orgnaization characteristic, orgnaization model still can be divided into orgnaization of pickaback plane compose, father, ... , multilayer orgnaization model, with modular design the thought undertakes designing, build modular difficulty effectively dispersedly already so, can make its maintain the integrality of the model again, the data of each model can be shared and correspond each other. Because build,different goal should be satisfied in the model, reason can use the compositive means that build a model each layers to finish. Additional, as a result of the need of virtual reality, in each model due and alternant interface, the person can intervene at any time of the design generate, make the modification of the model, reframe to come true more easily. Graph the architecture of 2 fictitious designs 5.

2 yuan of models reach the method that build a model the ground floor of fictitious design is fundamental layer, for current part design, use standardization to devise a method, wait for the design of component like gear, bolt, whorl, formula of usable and theoretical calculation, experience, loop is revised, finite yuan of law, attrib border the knowledge such as inference of yuan of law, distributinging parameter, experiment, implementation computer undertakes groovy design is mixed automatically optimize a design, want to use all sorts of state levels and standard in this design process of course, the GB that when will be being designed, should use and collect of material parameter chart regard a foundation as the database, so that undertake,call. The model of every spare parts is a small expert system actually, according to different spare parts the design asks to undertake intensity, stiffness, fatigue, stable, dynamic balance wait for a design, the character that its are the attribute such as the appearance that forms reflective part, function, behavior, intent as a result is occupied. Next, accordingly data uses the different algorithm of graphics, the apical law that is like multilateral triangle, batten law of all sorts of curved surface curves, use proper illumination, build the geometrical modelling of the spare parts and physical model, undertake exterior grain map, apply colours to a drawing according to material parameter again, form yuan of model of some spare parts namely. If pursue,3 are shown. If will have standard component and bid of certain and commonly used blame the model is built, can form yuan of model library. Graph of 3 yuan of models build a model 5.

After design of 3 orgnaizations model had yuan of model of all sorts of spare partses, like be made actually, should construct by the spare parts orgnaization, construct by pickaback plane compose again father orgnaization. existing actual orgnaization classification classifications, different orgnaization may have different kind, class, layer, undertake to its the orgnaization builds a model next. Orgnaization model submits tree form, orgnaization model should transfer a part yuan the data of the model, yuan the model is nodded for Xie Jie, father orgnaization should use the data of model of pickaback plane compose, again the data that the father node of superstratum calls father node, the rest may be deduced by analogy, till the independent part of the component that becomes independent to all the time or product, its structure is shown 4 times like the graph. Graph structure of shape of tree of 4 orgnaizations model pursues 5.

4 products model designs product model to regard a product as the carrier of the expression on the computer and product information, it is fictitious the target of fictitious design in making, on the foundation of orgnaization model, build model of whole product system, usually, systematic cent is a few big module, because different field is right the perspective of product information and abstract arrangement of ideas are disparate, need to build the model of different type according to different type product. If the model of mechanical and electrical products has dynamical module, electric control module, rotational gearshift module, executive module to wait, to product model, not only the description of the kinetic, kinematic, electric function of the big to each module of the requirement in asking to have orgnaization model, even error of pair of whole product function, motion, precision, stiffness, quality is evaluated wait for all sorts of descriptions. Although product model also wants to notice each function of main component and quality index, but the integral performance that what product model basically cares is a product, quality and safe requirement, want to reflect the feature of product appearance already, the main function that should reflect a product again reachs feature of other secondary function, it is highest model. Product model wants successive on orgnaization model foundation, integrated, abstraction, Baconian, abstraction already the information of each module, should be emulated for the function of the product again and fictitious assemble provide direct information basis. Should examine whether does the product satisfy booked requirement, must undertake emulation mixing fictitious assemble. Fictitious assembling is to examine of each component of the product, orgnaization and whole system structural design is reasonable, its can assemble gender, producibility to whether satisfy a requirement; Function copy is to examine whether the function of each respect satisfies the product really book a requirement, accordingly, all sorts of emulation that are based on different goal and fictitious assemble the model that should oneself become independent. Of course, assemble model and emulation model and before yuan of model of appraise, orgnaization model and product model affirmation are having direct connection, especially of data share and correlation is impartible. 6 conclusion are fictitious making is contemporary and compositive the fundamental application of production system, it is information of modern business management mixes a variety of production of technical information compositive, outside dividing fictitious design, management of fictitious technology design, fictitious equipment and production attemper, fictitious production treatment, fictitious assemble wait to remain to consider, even if is fictitious in making, fictitious design problem still also has a lot of problems to require thorough research, be like fictitious production fictitious and compositive environment is built, of database of the program management of all sorts of files, foundation build etc, need country, industry and society the expert joint efforts of each respect. CNC Milling CNC Machining