From FEM feedback arrives CAD

People can look through the basis method of mark dimension deviation will reduce the happening of phenomenon of plank spring back only in the past. And nowadays. FFM(is used on the computer finite yuan of analysis law) imitate can be calculated beforehand the spring back quantity of plank. Pledge in plank most below poorer condition. These two kinds of methods (the result of FEM feedback answers CAD system) very costly, the purpose of newest generation software depends on developing a kind to be mixed more simply quick working way. This kind of program can be used at compensating spring back not just. Also can feedback the result automatically the CAD model that returns board. Let us do a test: The plank that seeks size of a piece of A4 piece the attempt curves it, very easy can be in the jackknife of fluctuation both sides of plank rise. But once cancel active force, plank meets rapid spring back: This is effect of so called spring back. Must the appearance that plank talent of farther boast music makes its exceed spring back to the limit is nodded and hold a hope. Plank is the semi-finished products with the most essential auto industry, because this is necessary,clear up this phenomenon. Should move except shape after the tool, because its material oneself is characteristic,plank is met the form that with the reason of stress deviate designs beforehand. The existing means that removes effect of this kind of spring back is to be calculated beforehand quantity of deflection of good spring back, be measured according to this deflection next and look the deviation dimension between mark dimension is amended shape tool. Long-term since, the blueprint on design personnel desk becomes increasing. Today CAD of CAD(of have the aid of) the system can be on the computer scale the blueprint with two three-dimensional perhaps dimension, PLM(product lifecycle manages) progress ceaselessly with digital laboratory technique, make had used trial-produce rarely in plank treatment, the flow of error correction. Very use " Flex " the technology will improve shape the circumstance of the tool is not scarce also. Compatible and different CAD system: Use " Thinkcompensator " software reveals a car to make the sense of colorific of problem of exterior spring back that appears in the process: Mix the color that showed tool surface falls in different position. Software of have the aid of undertakes spring back is compensated, green is before compensation, red is after compensation. Data of manual input FEM is very costly the CAD data that designs in the mould today (the exterior trim of class A quality with structural member) in already compositive finite yuan of analysis method, imitate computation spring back is measured and can try to eliminate spring back on the model so, input the data that recount passes to CAD system again next; About this one flow, have two kinds of means of settlements at present: One kind is to CAD system handiwork inputs FEM data, next the target coordinate that reoccupy gets through FEM imitate computation undertakes compensating. This is very complex job technological process, basically depend on the meticulous rate that manipulates personnel, as a result of the account that changes by hand, to same a tolerancepublic errand control that the mould also did not consolidate. Cannot repeat arbitrarily below this kind of circumstance so change, that is to say, begin a new working measure to need to undertake from the beginning every time. This method machines the tool that uses in working procedure to also appear very troublesome in sequel to amending, because these tools need a basis every time,the complex degree of mould dimension undertakes matching. These jobs that match the job to bring need to last several days normally even several weeks. The 2nd kind of method that software of exterior bounce technique transmits data to CAD system in the blemish of quality respect is to use software of exterior bounce technique to have the job, adopt this kind of method need not manual data-in, with respect to the model of OK and fast modification plank. Nevertheless method of this kind of input still puts in blemish: Cannot ensure inside global limits tolerancepublic errand is controlled. And can lose the develop of original board model attack structure. Can get a result through law of double data processing: It is to adopt FEM method on one hand, it is to pass software of exterior bounce technique on the other hand. Namely with finite yuan imitate is built for the foundation kind the name is " reseau " (will onefold hypostatic imagination becomes reseau) express and tectonic method. Below Utopian condition, the surface has 4 border to nod. But, the surface that through reseau law construction comes out does not have such diagnostic property: Because we get is to build local model by hand, say exactly, this kind of model cannot undertake modification with traditional technique quite. Can arise to get much face more than primitive CAD model in the moving flow of software of exterior bounce technique, its quality is very low nevertheless. The class A quality that although be below this kind of circumstance,impossible hope gets be usinged at tectonic and visible free surface place needs, but still can get be usinged technically at car white automobile body or interior trim exterior data. These surfaces must have first-rate appearance and quite tall list and quality. To control first-rate surface construction. Use light or zebra crossing grating. Hit zebra crossing grating on exterior model, OK the outside imitate of rough entire section becomes partial reflex line to try to identify. Once give reason,such circumstance is about have the aid of revises the surface at the reference point of model oneself, on the appearance that till the light reflection expects in exterior place. Through the light reflection is returned can go to the data output that needs to revising exterior place on milling machine. The problem that exterior bounce technique appears easily is missing reflex image and to exterior quality guess. The exterior amount of the model is more, of zebra crossing method move to be jumped over not flowing. New software can ensure two kinds of solutions above initiative quality cannot make design personnel truly satisfactory actually. So far, they still need to develop the time with the many expenditure in the process in model car. In addition, the quality of working achievement still basically depends on the quality that designs staff and level. Now. Be located in the have the aid of of company of a software near Munich at a kind of compensator that the name can think for " Think Compensator() " the program developed kind of new solution, this method is OK will finite direct feedback returns yuan of simulative data CAD system. Whole process runs automatically. And do not need a few hours even manual labor of a few days. Additional, this software still can solve the light to reflex the quality that appears in the process to drop problem. Design personnel is OK dot of public errand of write one's own ticket. In addition, data is returned can compositive in the working measure to in the future. Needing what emphasize particularly is, the develop of CAD model attacks the structure got withholding: Exterior amount, attrib border, bend to be able to withhold with diagnostic attribute, the primitive quality of the model got assuring. This software have the aid of at a kind the name is " shift is arranged " the CAD data with methodological primitive processing, and what FEM imitate operation gets is initiative / target reseau. Rise through contrast only then / last requirement can revise CAD model. In addition, this software is OK still will different CAD and FEM system data set are become together. The user is OK repeated usage the GSM technology of this program (overall situation shapes build a model) (this kind of technology can is to carry mix the software that build a model with the surface " ThinkiD " in use) . GSM technology came true to be in ensure express and intermediate zone region is qualitative most the surface is amended below premise between the possibility of complex structure. A lot of companies used this software, for instance BMW car (BMW company at the same time also dominant the development of this technology) , the Ke Yinsi of the Attrezzeria Paganelli company of Ma Zida car, Italy and beautiful convict company of industry of the base of a fruit. The model car of these company interior makes above speed and the promotion with clearer than getting before photograph; Repeated measure individually to get very good avoid. A few elements that be as follows (shorter development cycle, sudden market answers speed and the cost that reduce significantly) producing bigger and bigger effect, still can promote further in the future include automobile manufacturing industry inside the gain ability of a lot of industry. CNC Milling