Fictitious make a mould is enclothed to make medium application in the car

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Preface develops as the high speed of national economy, of people living standard rise considerably, people is older and older to the demand of the car, the market competition of car mould is more and more intense also. "Quality is good " , " precision is tall " , " the price is low " , " date of delivery is short " etc is the people main demand to contemporary car mould. But, car mould is a kind of large mould, its bulk giant, structure precision of complex, dimension and demand of exterior surface roughness are higher, it is quite difficult to make. And, the base that uses to reduce the weight of the mould draws out empty Bao Bi type construction and for maintenance easy among model the setting that the face uses spells a structure, mix to the design make brought greater difficulty. Normally for, a car enclothes a spare parts to need the working procedure ability of path or 3 3 above to finish, that is to say, produce a car to enclothe a spare parts to need 3 pairs at least or the mould of 3 pairs of above. If the car enclothes a spare parts to did not consider when design,make a case actually, so the mould that the design comes out cannot undertake possibly when make machining at all, perhaps make the mould that come out cannot produce a yield product, bring about a mould thereby discard as useless, lengthen the development cycle of the product, this kind of pecuniary loss is unthinkable. But, the mould is in design phase is the difficulty that cannot expect in production process the lieutenant general appears. Fictitious production technology is technology of a kind of software, it is CAD/CAE/CAM/CAPP and the higher level of emulation technology, it can arrive from the design in mould of the implementation on the computer make examining whole process, according to the emulation process of fictitious model, can go up in the computer basis " actual " the design that treatment case will come revise a mould, avoided to create the appears possibly problem in the process in the mould, achieve thereby shorten the development cycle of the mould, reduce the development cost, goal that improves manufacturing efficiency, it is car mould development has latent capacity most consequently the most practical one of the most effective technologies. Fictitious make (VM) is fictitious make (VirtualM Anufacturing) makes draft again solid make, it is a kind of when United States of 80 time later period puts forward above all new idea, it is to use the person in making an activity IT, emulation technology, computer technology to reality, content, information to reach production process to undertake comprehensive emulation, with discovering the appears possibly problem in making, adopt precautionary measures before the product is produced actually, make a product one-time production success, reduce cost in order to achieve, shorten product development cycle, enhance the purpose of company competition ability. Be in fictitious in making, product from process of initiative appearance design, production build model, emulation treatment, model to be assembled examining to produce cycle wholy is those who emulate undertake on the computer imitate is mixed, do not need actual production to give a product to examine the rationality that the mould designs, can reduce early days to design later period treatment to make brought trouble consequently, the situation that can prevent a mould to discard as useless more appears, achieve n that raises product development thereby, shorten product development cycle, reduce the goal of the production cost of the enterprise. Fictitious make since people gives it an unified definition with respect to strive since generation, but fictitious make involved ken very extensive, different researcher, jumping-off place and side focal point are different also, understanding is consequently very different also, bring about fictitious make up to now still the definition with exact neither one. In different definition, we can be fictitious production understanding the fictitious design technology of the product, fictitious production technology of the product and fictitious production system a technology of technology of 3 respects key is integrated. The fictitious design technology of the product (the fictitious design technology of VDT) product (VirtualD EsignT Echnology) is to face the principle that digitlizes product model, structure and function to go up to undertake designing to the product in the computer, emulate a variety of production plan, the structural performance that analyses a product and can assemble a gender, forecast a result with function with obtaining the design of the product to evaluate, optimize products plan and technology design thereby, reduce the appears possibly problem in production process, reduce cost in order to arrive, shorten the purpose that produces cycle. The fictitious production technology of the product (the fictitious production technology of VMT) product (VirtualM AnufacturingTechnology) is to use the computer to emulate a technology, order of the resource that has according to the enterprise, environment, productivity treatment method to the spare parts, working procedure, tool and craft parameter undertake choosing, fictitious model is built on the computer, undertake machining craft sex, ship-fitter art sex, cooperate between cooperate gender, join the motility between the join sex between, moving link the emulation analysis that wait. Pass an analysis, can discover the blemish in treatment and the problem that when assembling, appear ahead of schedule, undertake be modificationed accordingly to workmanship process thereby, till whole production process completely reasonable, will achieve optimized goal. The fictitious production technology of the product basically includes imitate of material hot-working craft, ship-fitter art process of imitate, plank figuration imitate, treatment is emulated, the mould is made emulate, the product tries a model to emulate etc. Fictitious production system (VMS) is fictitious production system (VirtualM AnufacturingS Ystem) is to will emulate a technology to introduce in numerical control model, offer imitate to produce the fictitious environment of the process actually, be about to machine control model is used at emulating, undertake optimizing controlling to making a process on the foundation that makes the enterprise is considering a workshop to dominate action, its target is to produce medium process actually to optimize, more the configuration of actor makes a system as the advent of network times fictitious production technology got rapid development, the field of research is wider and wider also, what include besides itself of fictitious production domain is fictitious overall situation of the system below production academic system, design information and the three-dimensional visible, fictitious environment that produce a course is best decision theory and technology, fictitious the assembly of architecture, fictitious product emulates the open mode of production system, fictitious production process is reached in fictitious environment, the time vigor that shows level experts to casting National People's Congress to measure studies compositive system and relevant software develop fictitious production technology. Does American Washington city establish an university to be in the Pro/enginee: of PTC? Developed on Qu AD/CAM system face design and system of production fictitious environment VEDAM, it includes to machine equipment to establish modular environment, fictitious design environment, fictitious production environment and fictitious assemble an environment. The system of fictitious production prototype that the person such as Lee of Singapore state-maintaineding university and Noh uses system of Internet, expert to developed tool, HTML/VRML and database system to develop to regard project and manufacturing activity experiment as the stage. Foreign software company is in tremendous applying of demand drive below, also rolled out Deneb early or late, multigen, DVISE, world-ToolKit, a batch of support such as EA1 are fictitious production software. Fictitious production technology is much skill of a many discipline is integrated, its relevant technology support includes to emulate the technology, technology that build a model, computer graphics, visible technology, multimedia technology, virtual reality technology to wait, these technologies very good compositive rise application is the stress that studies at present. Fictitious make the development that covers an applied car in the mould to enclothe a mould in the car want to be reached what can safeguard the many sided such as the gender to restrict by dependability, beautiful sex, economy, producibility. A mould is enclothed to develop a process in traditional car in, when the mould the design is reached make after finishing, need is debugged through what relapse revise, ability gets satisfactory car part. In debugging a process, blemish of a few figuration, like burst, corrugate, spring back, become warped the problem such as horn, basically be the experience that depends on mould benchwork division, through trying model, long model, retry the model, circular process ability that builds a model again is solved. This kind of method not only reduced manufacturing efficiency, and the mould precision that production gives often the demand that short of expects, return the development cycle of meeting lengthen mould. And fictitious production technology can shorten greatly this one cycle. Because be below virtual reality environment, the design does not need to build hypostatic model with production car, the engineer can be used fictitious " natural " visible advantage of the environment, optimize the structural analysis of car mould, fictitious design, subassembly and function wait for confluence to be in the computer undertakes in fictitious production system, considering car automobile body integratedly the outward appearance is overall between layout and component join each other on the factor foundation such as interaction, mix to mould geometry dimension, specifications, production make those who wait for a respect to have alternant type is fast build model and emulation analysis, avoided to build a model repeatedly thereby, the precision requirement; that assured a mould and can be operated directly because of generated emulation model with revise, data can be used repeatedly, shortened greatly consequently the periodic Cs-i21 that the mould develops is fictitious production technology and fast figuration technology, retrorse design, converse the advantage with the technical more first-rate than having photograph such as the project, engineering design that is based on knowledge. Because fictitious production technology has unique fictitious design to create an environment, can make a mould whole develop a process to be in completely fictitious " actual " undertake in the environment, just begin to undertake objective is made after the requirement that reachs the side such as expectant performance quality, make create the contented user demand with the one-time pattern that give thereby, reduced the percent defective of the mould greatly, reduce the development cost of the enterprise. The car enclothes a mould fictitious the technological process of production fictitious production development that develops flow car to enclothe a mould is shown 1 times like the graph, begin from product requirement analysis above all, undertake the concept is designed next, again from optimize a design to arrive the system is compositive, through using relevant development software, in fictitious environment, the fictitious model of tectonic product. This is the process of advance gradually of a loop, be based on the development demand of the product, use corresponding emulation to analyse a tool to undertake emulation an analysis to the function of fictitious model and function, undertake to the behavior of fictitious model imitate is analysed, be based on the result of emulation analysis, analyse the improvement of ~ model through building modular ~ to emulate repeatedly, until fictitious make the pattern that give satisfy the end that expects a design, just begin to undertake objective makes F1s7. By next graphs knowable, the car enclothed a mould to had been passed before the production that send a person fictitious " real environment " examine, what get on the encounters possibly difficulty in be being made actually and design is unreasonable examine entirely come out, let design a staff member to undertake revise or be redesigninged again, till whole production process can completely reasonable, successful finish. Such not only can shorten the research and development of the product is periodic, reduce the cost of research and development of the enterprise, return the quality that can improve a product. The car of general flow chart that the car covers a mould to make enclothes a mould fictitious the crucial technology in making enclothes a mould in the car in fictitious production process, involved relevant technology is very much, the stand or fall of an any technical application can affect the final quality of the mould, this also is fictitious one of reasons with slow progress of production technology application. What only every technology masters application is very good, fictitious make the product that give just can be mixed make production product actually reach consistent, ability is achieved reduce development cost, shorten the development cycle, purpose that improves mould quality. Be hard to master quite among them and very crucial technology: (Of 1) maths model build build simple and the mathematical model that can reflect dynamic production process is fictitious the key that production technology covers an application in the mould in the car. What mathematical model builds is unreasonable, the production process that come out is emulated to be met below so fictitious environment with make a process actually different, the action that optimizes mould design is less than since, thereby short of shortens development cycle and the goal that reduce development cost. Accordingly, when using fictitious production technology to develop a car to enclothe a mould, must build a reasonable mathematical model. When building mathematical model, want to analyse a car to enclothe the feature of a mould seriously, mix according to mould function production demand, find out affect factor basically among them, put forward reasonable hypothesis. Built model must can reflect a pattern all function and production relation, the metabolic relation that the change that includes the mould when the job face to get power concerns to get force figure with stamping workpiece, such ability emulate an actual relations of production, ability forecasts the produces possibly problem in production, achieve optimize design and production goal. (2) system is compositive be being evaluated with plan is car mould fictitious the foundation that the early days in making works. Systematic market success is an optimization is integrated design as a whole, need a lot of technology support, include news of technology of computer software, hardware, operating system, database technology, network to wait, need sets out from overall situation consider the impact between each subsystem, study the interface between each subsystem concerns. The goal that compositive place should achieve the system, integral function is best, namely after all components and composition close together not only can work, and whole system is low cost, efficient, function is well-balanced, but augment and the system that can maintain. But to average company, purchase the software system of all ready emulation analysis is a high cost to send a person, and, doing not have professional staff is the action that cannot allow these software to develop incisively and vividly. Real environment drafts goodly in what fictitious production system supplies the computer, the staff member can undertake to building the fictitious model since evaluation and revise. In this phase, can the production process of imitate mould, the feasibility that solves each component to make and; of difficult easy sex are OK of imitate mould rig a process, the; of difficult easy degree that solves the join sex between each component and equipment sex and operation can have fictitious test, examine through the test the productivity of the mould and manufacturing quality. In the assess in a variety of plan the execution of each plan is spent easily hard, expend cost discretion to spend, expenses time length is spent etc, the best production that the choice suits to produce a condition most plan. (Essence of 3) collateral project is compositive ground, collateral design product and its component and the method of a kind of system of all sorts of processes. The member that this kind of method asks the product develops personnel and someone else works jointly together, consider a product at the beginning in the design the product is formed to discard as useless from the concept in whole lifecycle all elements of processing, the requirement that includes plan of quality, cost, plan and user. All jobs that what collateral project emphasizes is all staff members undertake at the same time, those who emphasize is group work spirit, consequently each person on working catenary has the right to undertake checkup to the product of the design, the product that do one's best lets design more facilitating treatment, facilitate assemble, facilitating maintenance, production cost is lower, production cycle is shorter. The fictitious production project of car mould is undertaking initial stage also must set out from the total construction of car mould and function, the consideration makes fictitious model the mutual join relation between each part and interaction relation, regard them an organic whole, realize inside data and resource share, the mould that ability makes production goes out achieves anticipated result. Car mould is fictitious in production process, the job of every part all is run paralell by different staff member undertake, but the functional activity of departmental cent is put in the interdependent impact with much move again, want to make sure the job between each part staff member undertakes smoothly in coordination, the implementation information exchange in activity of the group in distributinging environment and share, must undertake to designing a process trends is adjusted with monitoring, provide the working environment of collateral design, assure the success of collateral design, this is fictitious production mould shortens the key of development cycle. The condition that collateral project carries out should have support namely each field staff is collateral the job, even the computer network system that different ground works and monitoring mediation personnel, just can designing real time, onlinely individually information, discovery is communicated between personnel and mediate conflict. A proper member that manage pacifier is the significant software in collateral project, also be collateral project whether the key of success. (4) emulates analysis and data processing is car mould fictitious a difficulty in making, also be block up fictitious production technology is large-scale in the enterprise a when use main factor. Emulation analysis needs the technical support of many sided, data processing needs giant database and the talented person that have professional knowledge, need sets out from overall situation consider the impact between each subsystem, study the interface issue between each subsystem. The professional emulation software that this one technology needs much territory works in coordination, need professional considers to discuss jointly, however the emulation analysis software that most enterprise deploys all ready place to need hard and the professional that have place to need. Japanese Feng Tian Motor Corporation uses fictitious production technology to succeeded to give out AVALON of cropland of new model abundant. Because producing early days to be able to forecast the problem that the likelihood in production appears, make staff member prior discovers and solve a problem, in the design inchoate phase gets more information, reduce the development risk of the enterprise thereby. Feng Tian AVALON is in whole development process, development cycle reduced 10 months, development staff decreased 20% , manufacturing model car decreases 70% , development cost reduced 35%; and quality had the car that production gives to rise significantly. This shows, fictitious production technology not only can shorten the development cycle of the product, reduce the development cost of the enterprise, and the quality that can improve a product and success of research and development are led. Fictitious make current progress the state is fictitious make from put forward now already all previous classics 20 old, very great progress got on the technology, applied respect also got expanding extensively. Be in abroad, unit of a lot of schools, institute, scientific research, large company waits to be in ceaseless research and application are fictitious production technology. In recent years, more already ground uses virtual reality technology in car development work, preliminary already form major of a kind of collect the design of academic, engineering, scientific test relatively complete application that is a suit system. For example, beautiful 1995 GB follows the report with technical institute " the notional design of stage of advanced production experiment plans the nation " , emphasized dispersing, bit knaggier dispersive and fictitious make (DVM) , namely the notional; of dummy company and the report of council of American country research " the IT in making " , discussed a product control of design of compositive, course, workshop, fictitious factory the IT problem that wait. Ford Motor Corporation also has planned to apply fictitious environment technology to design and develop a car, the group of advanced car technology of this company emulates application of fictitious production technology at assembling and fictitious figuration, in order to improve the result that aerodynamics, ergonomics and surface build a model. The interior that the world's greatest navvy and construction equipment make enterprise Caterpillar Inc use fictitious design technology at evaluating new model car can inspect sexual; this company to still plan to let a client undertake to new product with this technology " actual test-drive " . Japan built model and the tectonic environment respect of emulation technology and fictitious factory to also develop much research in what have fictitious production system, a few large Motor Corporation are like this 3 water chestnut, Feng Tian, cropland to wait applying fictitious production respect to fetch bigger gain. In recent years, what French Reynolds Motor Corporation applies is holographic virtual reality system of the technology, have very good visible level, promote fictitious technology to a new chance to extricateoneself from an awkward position in the application in car mould. Our country is in primary level in the technical research of fictitious production respect and actual application, the knowledge in respect of fictitious production theory is immature still, the development that uses this technology at car mould and production respect is less. A few colleges combined institute and enterprise to have much research in respect of fictitious production theory, also developed a lot of technologies that fit our country business. The dispersive network that is versed in as aid university and Hong Kong manage the university combines mechanical and scientific academy to consider is made, different ground design and make waited for a technology to had obtained many progress; Wuhan design of intelligence of grain industry college and Inc. of chance of Zhen Hua port of production institute and Shanghai cooperate, already developed " container unloader CAD and emulation system " ; Tsinghua university is in the research of the respect such as system of training of software of fictitious design environment, virtual reality, fictitious machine tool, fictitious car also obtained very great progress. But because get of the fundamental software such as CAD/CAM/CAE/CAPP, emulation software, technology that build a model restrict, the research of fictitious production technology is our country more fictitious production a few unit technologies, figuration of the assembly that the content of research basically is fictitious product, fictitious plasticity, machine tool is figuration of overall program design, fictitious test, fictitious plank, fictitious CNC Machining and dummy company. Fictitious production technology is a technology that has vitality. Abroad had reached the level that can use its very well at actual production to the research of fictitious technology, and our country has not developed the software product that supports fictitious production technology temporarily, also did not understand completely to the commercial software of introduced abroad and absorb, cannot very good will in using actual production. Consider to be compared with abroad, the research majority of our country stays on systematic frame and overall technology, the faces application crucial technology of materiality still remains to rise further. Conclusion car mould took quite important place in whole auto industry, and auto industry took quite important place again in whole manufacturing industry. A car thought of to finish production from first form in the past, need 3 years two even more time; and develop in computer industry height today, on the foundation that matures with each passing day in CAD/CAM/CAE technology, use fictitious production technology to be able to shorten greatly the development cycle of the car, return the development cost that can reduce an enterprise. Fictitious production technology is made in car mould in have very good application perspective, but be in our country, because get the tie of many sided, what fictitious technology uses in car mould is less, most research just still lies academic side; is in the following research, we are applying this respect actually to make research more, rise fictitious production technology and gather of other figure technology, use the computer and Internet, better the advantage of fictitious production technology application rises. CNC Milling CNC Machining