【導讀】業(yè)用語翻譯基本準確，基本符合中文習慣，整體翻譯質(zhì)量一般。本文提出了（有關(guān)）注射模裝配造型的兩個主要觀點，即描述了在計算機。注射成型是生產(chǎn)塑料模具產(chǎn)品最重要的工藝。件稱為成型零件。了注射成型外，注射模還必須完成分配熔體、冷卻，開模，傳輸、引導運動等任務，圖1顯示了注射模的結(jié)構(gòu)組成。又相互聯(lián)系，相互限制。和銷釘，但是CAD系統(tǒng)只能用于另一種信息的操作。通過舉例一個注射模的自動裝配造型，提出一種簡化的幾何學符號法，用于確。定注射模具零部件的結(jié)構(gòu)和位置。據(jù)稱，很多研究人員已。然而這些變化矩陣并沒有緊緊的連在一起，這將嚴重影響整體。的結(jié)構(gòu)，即，當其中某一部分移動了，其他部分并不能做出相應的移動。方程式的數(shù)量超過變量的數(shù)量時，應該想辦法去除多余的方程式。征，這樣將減少物體的自由度數(shù)。Kramer使用的基本參考實體稱為一個"標識"，由。根據(jù)Shah和Rogers的分析，Kramer的理論代表了注射模具最顯著。Kruth開發(fā)了一個注射模的設(shè)計支援系

　　

【正文】 opriate for representing the structural relations between ponents. A hierarchy implies a definite assembly sequence. In addition, a hierarchical model can provide an explicit representation of the dependency of the position of one part on another. Featurebased design [10] allows designers to work at a somewhat higher level of abstraction than that possible with the direct use of solid modellers. Geometric features are instanced, sized, and located quickly by the user by specifying a minimum set of parameters, while the feature modeller works out the details. Also, it is easy to make design changes because of the associativities between geometric entities maintained in the data structure of feature modellers. Without features, designers have to be concerned with all the details of geometric construction procedures required by solid modellers, and design changes have to be strictly specified for every entity affected by the change. Moreover, the featurebased representation will provide highlevel assembly objects for designers to use. For example, while mould designers think on the level of a realworld object, . a counterbore hole, a feature object of a counterbore hole will be ready in the puter for use. Objectoriented modelling [11,12] is a new way of thinking about problems using models organised around realworld concepts. The fundamental entity is the object, which bines both data structures and behaviour in a single entity. Objectoriented models are useful for understanding problems and designing programs and databases. In addition, the objectoriented representation of assemblies makes it easy for a “child” object to inherit information from its “parent”. References [1]. K. H. Shin and K. Lee, “Design of side cores of injection moulds from automatic detection of interference faces”, Journal of Design and Manufacturing, 3(3), pp. 225–236, December 1993. [2]. Y. F. Zhang, K. S. Lee, Y. Wang, J. Y. H. Fuh and A. Y. C. Nee, “Automatic slider core creation for designing slider/lifter of injection moulds”, CIRP International Conference and Exhibition on Design and Production of Dies and Moulds, pp. 33–38, Turkey, 19–21 June 1997. [3]. E. C. Libardi, J. R. Dixon and M. K. Simmon, “Computer environments for design of mechanical assemblies: A research review”, Engineering with Computers, 3(3), pp. 121–136, 1988. [4]. K. Lee and D. C. Gossard, “A hierarchical data structure for representing assemblies”, ComputerAided Design, 17(1), pp. 15– 19, January 1985. [5]. K. Lee and D. Gossard, “Inference of position of ponents in an assembly”, ComputerAided Design, 17(1), pp. 20–24, January 1985. [6]. A. P. Ambler and R. J. Popplestone, “Inferring the positions of bodies from specified spatial relationships”, Artificial Intelligence, 6, pp. 157–174, 1975. [7]. G. Kramer, Solving Geometric Constraint Systems: A Case Study in Kinematics, MIT Press, Cambridge, MA, 1992. [8]. J. J. Shah and M. T. Rogers, “Assembly modelling as an extension of featurebased design”, Research in Engineering Design, 5(3amp。4), pp. 218–237, 1993. [9]. J. P. Kruth, R. Willems and D. Lecluse, “A design support system using high level mould objects”, CIRP International Conference and Exhibition on Design and Production of Dies and Moulds, pp. 39–44, Turkey, 19–21 June, 1997. [10]. J. J. Shah, “Assessment of feature technology”, ComputerAided Design, 23(5), pp. 331–343, June 1991. [11]. S. R. Gorti, A. Gupta, G. J. Kim, R. D. Sriram and A. Wong, “An objectionoriented representation for product and design process”, ComputerAided Design, 30(7), pp. 489–501, June 1998. [12]. J. Rumbaugh, M. Blaha, W. Premerlani, et al. ObjectOriented Modeling and Design, Prentice Hall, Englewood Cliffs, NJ, 1991. [13]. Unigraphics Essentials User Manual, Unigraphics Solution Co., Maryland Heights, MO, 1997. [14]. IMOLD homepage :://, Manusoft Plastic Pte Ltd. Singapore.