基于语义的压铸模浇溢CAD系统建模方法研究

发布时间：2018-01-20 00:39

本文关键词： 压铸模具浇溢系统语义 CAD　出处：《合肥工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：压铸模具浇溢系统设计作为压铸模设计过程中的重要组成部分,其设计合理性直接关乎压铸件产品的质量和使用寿命,随着压铸模设计技术的快速发展,计算机辅助设计开始渗入压铸模设计领域,并逐渐成为必不可少的辅助技术。目前,多种三维CAD设计软件已经广泛应用于压铸模建模设计中,但由于缺乏专业的压铸模设计指导,导致手工建模标准性低、规范性差。本文针对上述问题,总结了压铸模浇溢系统设计领域的专业知识,在此基础上引入压铸模浇溢语义单元的概念,对浇溢过程所涉及模块进行语义划分,提出基于语义的压铸模浇溢系统建模设计方法,将几何信息与设计意图契合统一,尽可能减少设计信息易产生的随机变异和理解偏差。文章首先以浇溢系统相关知识为基础,给出了浇溢语义单元的相关定义和结构样式,进而提出基于语义的浇溢模型设计方法,然后基于上述方法,结合现有二次开发技术在UG平台上实现该语义系统的设计,并介绍系统开发流程、模块设计方案和二次开发技术。其次,对系统中部分语义单元的设计过程进行详细讨论,给出了相关实现算法和设计思路,提出三维分型面上,利用二维参数的衍生映射获得建模所需三维参数,进而精确建模。本文中提出了基于语义的浇溢系统建模设计方法,实例分析表明,该方法使得设计者能够从语义层直观编辑浇道特征,规范建模步骤,通过调用修改接口实现模型再驱动,在对诸多复杂压铸件模具设计中具有良好的精确性、高效性及广泛的自适应性,能有效地缩短开发周期。
[Abstract]:As an important part of die casting die design, the design rationality of die casting die overflow system is directly related to the quality and service life of die casting products. With the rapid development of die casting die design technology. Computer aided design (CAD) has begun to infiltrate the field of die casting die design and has gradually become an indispensable auxiliary technology. At present, many kinds of 3D CAD design software have been widely used in die casting die modeling design. However, due to the lack of professional die-casting die design guidance, the manual modeling standard is low, standard is poor. In view of the above problems, this paper summarizes the professional knowledge in the field of die-casting die pouring system design. On this basis, the concept of die casting die overflow semantic unit is introduced, and the semantic division of the modules involved in the pouring process is carried out, and the modeling and design method of the die casting die overflow system based on semantics is proposed. The geometric information and the design intention are United to reduce the random variation and the understanding deviation easily produced by the design information as far as possible. Firstly, the paper is based on the relevant knowledge of the overflow system. The definition and structure style of spill-over semantic unit are given, and then the design method of spill-over model based on semantics is put forward, and then based on the above method. Combined with the existing secondary development technology to realize the design of the semantic system on UG platform, and introduce the system development process, module design scheme and secondary development technology. Secondly. The design process of some semantic units in the system is discussed in detail, the relevant algorithms and design ideas are given, and the 3D parameters for modeling are obtained by using the derived mapping of two-dimensional parameters on the 3D parting plane. In this paper, the method of modeling and design of spill-over system based on semantics is proposed. The analysis of examples shows that the method enables the designer to edit the characteristics of the sprue directly from the semantic level and standardize the modeling steps. The model redrive is realized by calling the modified interface, which has good accuracy, high efficiency and wide adaptability in the die design of many complex die castings, and can effectively shorten the development period.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG241

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