Nicety notes the application of model CAE technology and progress

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The application of technology of the accurate CAE that note model and developing plastic inject to shape is one of most effective plastic treatment methods, very important place is had in industrial department. Because lack academic effective guidance, long-term since mould worker can design mould and formulate to shape according to oneself experience and simple formula only craft. And in be being produced actually, to large, complex, exact pattern, make integrated consideration and correct processing to a variety of influencing factor hard by finite experience only. Traditional method already cannot get used to the need that contemporary and plastic industry admits flourishingly. Raising mould design and the efficient way of production level is CAD/CAE/CAM technical application becomes V-neck territory at plastic inject. From 20 centuries 90 time begin, a few forerunner of industry of our country mould already used plastic inject to shape in succession emulation software. Because emulate a result,can correct guidance shapes craft, optimize mould structure, shorten try model and long model time, remarkable improve plastic product quality, its importance is being known by mould bound place gradually. Plastic inject shapes emulate the forward position science that belongs to mechanical, mechanical, material and computer photograph across, sex of isotherm of the blame stable state of the blame Newton sex as a result of plastic fuse-element and inject flow process, blame, use computer simulation and optimize inject to shape the process has very great difficulty, although branch of domestic and international research and development is very much, but can form commercial system finally still can be counted on one's fingers. Australian Moldflow emulation system is international well-known trademark software, already was in our country a few unit application, but because its price is high, without Chinese interface, lack homebred and plastic stream change to data and technology groom and support the cause that waits for a respect, very difficult in domestic mould bound large-scale promotion applies. Long-term since extensive pattern worker is ardent expecting our country to be able to develop a homebred commercial software that can rival with Moldflow photograph, so that promote our country the technical level of plastic mould industry and international competition ability in the round. Plasticity of university of Hua Zhongke ability shapes imitate and key laboratory of mould technology state begin from 1985, pass " 75 " , " 85 " , " 15 " national emphasis tackles key problem and the support of project of national science foundation, system and thorough ground began plastic inject to shape the research of emulation software system and development. From the HSCAE 1 that rolled out 1989.

0 edition arrive 6 2005.

10 edition, experienced analyse three-dimensional analysis from 2 dimension, from practical change commercialization, from local and pilot the process that accumulates promotion application to bedding face, successful research and development went out to have Chinese distinguishing feature, achieve current international the commercial plastic Injection Molding of advanced level is compositive change emulation system HSCAE 6.

10. Note model compositive change HSCAE 6 of brief introduction of emulation system function.

10 be object-oriented development is used below Windows environment method, finite yuan with border yuan numeric computation, artificial intelligence and the plastic inject that OpenGL graph platform develops shape the process is compositive change emulation system, all operations all compositive in the graphical interface that if the graph is shown 1 times,is in. Graph 1: HSCAE 6.

10 compositive change graphical interface to shape according to plastic inject craft and the demand that the mould designs, the system has following functions at present: (1) the three-dimensional geometry model that introduces plastic product directly undertakes emulation, the file of 10 kinds of formats such as supportive STL, UNV, INP, DAT, ANS, NAS, COS, FNF, PAT, MFD, came true with general CAD/CAM system without seam compositive. (2) can differentiate automatically have density pilot to suit oneself finite yuan of analysis reseau, offer reseau to edit tool, the error that is used at repair CAD model and optimize finite yuan of analysis reseau, can raise reseau quality and analytic result precision. (3) the database that offers open form, include plastic physics and stream change mould bases of parameter, inject machine parameter, standard and typical structure data, still can be offerred for user test flow plasticly change parameter, found database of material of business for a special purpose. (4) provide the quick design function that founds mould gating system and cooling conduit, supportive flow path is commonly used and sectional with complex refrigeration the structure is designed. (5) can forecast plastic fuse-element to be in fill a model to keep field of the before flowing position in controlling a process, shirt-sleeve grain and gas point buy, temperature, pressure field, shearing force field, cut element of rate field, surface orientaton, contractive index; (6) can forecast goods and mould the dynamic temperature field in cooling process distributings, cooling time and difference in temperature distributing. (7) the stress when can forecasting goods to give a model distributings and warpage degree. (8) offer plastic inject to shape the visible operation of the process, transmission process of machine of dynamic indication inject, mould and plastic fuse-element cooperates with Trinitarianly working process. (9) the substance that uses a system to offer sheds a function not only can plastic fuse-element is in imitate the process of going from place to place on goods, and can the imitate fuse-element flow in mould antrum, can be in goods random is sectional on indication flow keeps the analytic outcome that control. (10) technology of applied artificial intelligence, optimize shape program of design of craft, evaluation and generate multilingual version automatically to analyse a report. Note model compositive change HSCAE 6 of characteristic of emulation system technology.

10 in accede and carry on software of China model CAE to operate forthright, analysis accurate and show distinct the foundation that waits for an advantage is aspirant one pace protruding reveals technical characteristic as follows: (1) the central layer model that is based on the emulation software of the dynamic emulation tradition of three-dimensional substance to all be based on goods, but central layer difficulty is extracted in three-dimensional model very big, it is to hamper inject shapes the bottleneck issue that emulation software promotion uses. HSCAE 6.

10 those who offer is double-faced shed a technology to be able to be in directly surface of three-dimensional and hypostatic model differentiates reseau, pass reseau conjugate and the harmonious processing that introduce attrib border control to assure corresponding surface, can handle the product of resemblance of surface of correspondence of inside and outside not only, and can get used to the goods with bigger difference of surface of correspondence of inside and outside. What should point out is, double-faced shed a technology to be able to be in only goods apparently the process of going from place to place that shows plastic fuse-element, and cannot be inside mould antrum. HSCAE 6.

10 in double-faced ground of sex of the innovation on the base that spreads a technology realized entity to shed a function. With double-faced shed a technology to use exterior reseau to differ, entity sheds a technology to use stereo reseau, can more demonstrate fuse-element realistically the condition of going from place to place inside transparent mould antrum, and the user is returned can the condition of going from place to place that have the aid of cuts a function to inspect fuse-element to be in large part of aleatoric hour, aleatoric position and aleatoric wall at analyse and concerned data. (2) the processing of complex structure in cooling analysis is active and cooling analytic software sheds the complex refrigeration such as canal, cold clapboard and spiral coil cooling tube in processing gush when the structure, it is to use the straight round canal with root or a few one sectional equivalent to be handled approximately normally. The means of going from place to place of the cooling structure after simplifying and cooling water and actual condition discrepancy are very big, computer result is not quite accurate. HSCAE 6.

10 designed respective reseau unit respectively in the light of all sorts of commonly used and cooling structures, application of innovation sex ground mixes border yuan the law seeks solution. Carry out a proof, HSCAE 6.

10 offerred cooling analysis module are had cover wide, rate that seek solution result of fast, computation is accurate wait for distinct advantage. (3) be based on double-faced the stress that sheds a technology and warp analyse the analytic result that according to runner caky effect and dwell pressure and temperature distributing, the change that in the wall the stress on direction of thick peace extent follows time and goods are in stress and goods of computation of warp analysis module the systole of hour of drawing of patterns along mural thick way. Be based on double-faced the warpage that sheds a technology to use unit of a kind of special double deck housing to forecast hour of goods drawing of patterns. Because this method have the aid of is in at exterior reseau unit,the coupling tie on ply direction undertakes an analysis, can apply directly so double-faced the exterior reseau that flow is unit, the user need not increase workload. Of its computation precision and tradition in the computational precision when the face sheds a technology to use monolayer housing comparatives. (4) the computational tool that numerical value is calculated and the CAE software with the traditional couple of artificial intelligence technology basically is passive type. User of the need before the analysis is designed first shape plan and craft parameter, often do not know how to apply an analysis to coach as a result after the analysis production. This is popularized in what CAE software affected on certain level and gain ground. To produce the bigger effect of CAE software, HSCAE 6.

10 successful ground introduced artificial intelligence technology. In emulation system, wait for the parameter that has successive space extraction a cost to temperature of inject time, inject, use the method that is based on artificial nerve network to undertake optimizing, the method that is based on regular inference to analysing the explanation of the result and evaluation to be used will handle. For example HSCAE 6.

10 built experts fasten all regulation library is with the expert knowledge is a foundation, covered about short shoot, control of degradation of balance of going from place to place, fuse-element, difference in temperature, dwell time, license cuts stress, cut rate and lock the knowledge of the respect such as modular force, on the base that has be mixinged integratedly abstracting in bisect analyse result, drive expert system undertakes inference, the output in to shaping plan undertakes evaluating and analysing a report improves a proposal specificly. Experimental test and verify flows with what use software of China model CAE and protect press an analysis to ever experienced experimental test and verify twice as a result. The test of mould of square cup experiment 1996 makes clear, the biggest opposite error is result of analysis of going from place to place 13.

2 ％ , protect press an error to be 8 ％ , all allow an error in the project of 15 ％ in. 2000 test of makings experiment mould makes clear, error of going from place to place is 5 ％ , protect press an error for 5.

5 ％ , achieved average error to be in the world of 10 ％ less than advanced level. Graph 2 for 2000 circumstance of contrast of the pressure when makings experiment. The experiment is shake male CJ150M2-NC with inject machine, mould antrum dimension is 200mm × 40mm, use 3 pressure sensor, plastic material is HDPE of swallow hill petrochemical, installed 3 composition condition to shape in order to observe craft condition is right the influence of the process. Can see from inside the graph, experimental value and case of imitate value be identical are good. Graph 2: Experiment of force of makings experiment middling pressure is worth what be worth with imitate to compare software of China model CAE to already was in at present application is popularized domestic and internationally in many 80 enterprise, was mould of Qingdao sea Er to company and company of pattern of Guangdong division dragon test and build special material database respectively. Come more than 10 years, software of China model CAE gained very good economic benefits and social benefit in promotion application, obtained science and technology of 2002 year country to progress second-class award is judged to be in those days our country machinist job one of 5 great significant success. For example the initiative plan of mould of the carapace before Gao Meicai report of beauty of Qingdao sea Er includes runner of 4 one class and runner of 6 2 class, time full a pattern is 7s, inject temperature is 250 ℃ , product data is ABS, if pursue,3a place is shown. The discovery after be being analysed with software of China model CAE charges a pattern lopsided, goods upside fills up first apparently than bottom with two side. The inject pressure that considering initiative plan the analysis forecasts is not very tall (55MPa) , the place of 3b of design instead graph of system of reason general flow path is shown, two side runner reduces each, shorten time full a pattern for 2.

8s, analysis of software of CAE of reoccupy China model makes clear fill up balance sex is good, inject pressure change is not big (57MPa) . Company of pattern of Qingdao sea Er uses this plan to undertake the mould designs treatment, obtained very good result. Be like goods of drawer of freezer of company of Guangdong division dragon again, before using software of China model CAE to analyse, often appear in product obverse side apparently shirt-sleeve grain, bottom runner place often has rainbow grain, diaphaneity is insufficient. Fall in the guidance of software of China model CAE subsequently, through improving runner position, adjust product the wall of certain place is large, optimize inject temperature, eliminated successfully shape blemish, make quality of freezer drawer product rises substantially. The place on put together is narrated, china model inject shapes compositive change emulation system HSCAE 6.

10 it is the ideal tool that plastic product design, mould is optimized and the engineer grooms. We believe, hsCAE 6.

10 larger contribution is made in the development that popularizes a lieutenant general to have industry for our country plastic pattern and progress. The author contacts information: Li Dequn, professor address: Hubei Wuhan institute of material of university of Hua Zhongke ability (430074) phone: + fax of 86-27 8754 3271: + mail of phone of 86-27 8755 4405: Dequnli@public.

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