【導讀】射模CAD的集成技術的根本內涵，并提出了它的研究熱點和趨勢。從六五計劃開始,我國有許多模具企業(yè)采用CAD技術,特別是近年,CAD技術的應用越來越普。遍和深入,大大縮短了模具設計周期,提高了制模質量和復雜模具的制造能力。對模具CAD集成技術認識不足,投資帶有盲目性,不能很好地發(fā)揮作用,造成了很大的浪費。工、線切割等)、拋光和配試模以及快速成形制造等。各個環(huán)節(jié)所涉及的CAD單元技術有:造型和結。構設計、產品外形的快速反求、結構分析與優(yōu)化設計、輔助制造、加工過程虛。電腦塑件產品模型的來源有三種:利用CAD系。統(tǒng)軟件進行產品模型設計、利用實物測量進行快速反求建模、利用其它CAD系統(tǒng)的標準格式文件。二維幾何圖形的繪制是利用平面CAD軟件繪制零件圖形,即用計算機代替手工繪圖;而二。由于CAD系統(tǒng)種類較多,因此文件的格式就必須遵循國際標準,如DXF、系統(tǒng)、冷卻系統(tǒng)等都可以采用基于數(shù)據(jù)庫管理的參數(shù)化特征造型設計方法進行設計或建立標準件庫,

　　

【正文】 the method can is divided into the laser with not the laser burns the knot method( SLS), solid surface layer shape method( SGC), layer a manufacturing method( LOM) and melt to sink to accumulate the method( FDM), district constituency glues the knot method( DSPC), laser spirit to sink to accumulate method( SALD) etc. kind of method characteristics is:The method of SLA is applied at the earliest stage of took shape the technique quickly, the early market occupied the bigger cent sum, but is narrow because of the material scope, the cost is higher, taking shape the piece was heatproof and bore the burthen with applied color the ability low,The recent years was gradually replaced by the other method of FDM because of taking shape the speed quick, the cost is low, get the good application in plastics product profession, because the size of the spare parts is small, accuracy bad,Also suffer certainly of method of LOM because of adoption paper or is outline edge that thin slice plastics, the cost is low, and the laser projects light upon each layer only, as a result take shape the speed quick,But the product surface quantity is method of SLS proceeds to burn the knot with the laser, adoptive material than wide, if the plastics, 192。175。 anticipates, porcelain and ceramics, metals etc. all can take shape, taking shape the piece is heatproof and bear the burthen with apply color the ability stronger,Have the extensive and applied other method also gets the application in some special kinds process. According to above take shape the method characteristics, take shape the technical function quickly to consist in primarily:The manufacturing useds for the design with the on trial product model, make to used for the small the molding tool that batch quantity produce to process with the special spare parts in small batch shape the product model of the technique manufacturing quickly in the aspects of material the ratio tradition processes the product model of the method manufacturing has the difference, But in shape and sizes almost plete similar, and there is certain machine strength, can make the function experiment, handles through surface at the same time, looking similar to true product,Can advertise the propaganda shape the molding tool of the technique manufacturing quickly,Is a soft material to take shape the mold( the mold of 192。175。 , wreath oxygen resin mold, 185。232。 rubber mold, low 200。219。 orders the metal alloy casts mold etc.) primarily to synthesize the hard type in material 199。187。 mold with porcelain and ceramics or metals 187。249。s mold in manufacturing the hour can take shape with the fleetness the spare parts makes the female die,Create first the soft mold between wreath oxygen resin mold or other material, sprinkle to note porcelain and ceramics or gypsum molds in soft mold, then sprinkle the steel of 214。253。 steel mold。 or sprinkle the admixture that note in soft mold chemistry contain steel powder glue knot,Proceed to burn to bee the steel shape the steel mold of the technique manufacturing quickly to process after needing further did to throw light etc., make into the small batch quantity produce of note the mold of 203。220。 .Because the molding tool sprinkles to note or burn the knot with the steel powder but,Material and mon molding tool steel contain certain margin, therefore, the life span is shorter, cans make to manufacture on a trial basis product or small batch quantities , taking shape the technique quickly can also manufacture the special spare parts,If make with the metallurgy powder legal system the metals electrode, nicety cast the legal system makes the copper electrode, 209。208。 mold legal system makes graphite electrode etc.. Take shape the technique creation molding tool quickly to model the equipments with the product, all is STL to read CAD system creation or CLI etc. document format datas， Different document format data to the product accuracy of the creation contain bigger margin, therefore, study the system of CAD to take shape quickly the document format of the equipments output to have the very important meaning. 6, the molding tool CAD gathers technical development trend A calculator for saying, molding tool CAD gathering technique is applying in molding tool making each link assistance technique on the 219。 with each link information that realizes the technique ,The information gathers unify with data the management is a information of the product is to pierces through in the design, analyze, process, examine, assemble a stage,Fluency, solution data format that realizes each link information stan dardizes and the data maintenance is a point with future CAD that share to gather technique system of PDM emergence is to resolve this problem brought the first light of is molding tool business enterprise application CAD that the system of PDM puts into practice gather technical and important in molding tool manufacturing aspect,The intelligence that imply the research, high speed that abundant expert39。39。s knowledge turn molding tool CAD/ the system of CAM slices the 207。247。 processes and its plait distance etc. is a trend that future study the development.