SIGRAPH—DESIGN环境下的机构装配设计技术

研究了在智能ＣＡＤ系统ＳＩＧＲＡＰＨ－ＤＳＩＧＮ环境下进行机构装配设计的途径，给出了要领设计，装配设计和零件设计的一般方法，并以胶印机中凸轮一连杆机构为例，采用自顶向下的装配设计方法，     

箱体零件CAD／CAPP／CAM集成系统的研究与实践

在ＣＩＭＳ环境下，针对箱体零件ＣＡＤ、ＣＡＰＰ、ＣＡＭ信息集成的功能需求，在基于特征的箱体零件信息模型、工艺计划模型与服务于工艺设计的制造环境模型的支持下，开发出了特征造型，工艺设计及加工过程仿真与ＮＣ编程等子系统，从而完成了一个集成化的箱体零件ＣＡＤ／ＣＡＰＰ／ＣＡＭ系统。     

包装画面的量感设计

包装画面的量感设计阮伟光ＶＩＳＵＡＬＡＴＴＲＡＣＴＩＯＮＩＮＴＨＥＤＥＳＩＧＮＯＦＰＡＣＫＡＧＩＮＧＡＰＰＥＡＲＡＮＣＥ￥ＲｕａｎＷｅｉｇｕａｎｇＡｂｓｔｒａｃｔ：Ｉｎｔｈｅｌｉｍｉｔｅｄａｐｐｅａｒａｎｃｅｓｐａｃｅ，ｔｗｏｍｕｃｈｈａｓｔｏｂｅｐ...     

工业企业CAD和MIS系统的一体化设计

本文介绍了ＣＡＤ系统和ＭＩＳ系统的构成和数据特点，以及工业企业ＣＡＤ和ＭＩＳ系统的一体化设计方法。     

新型集成电路器件与中、高档B超诊断仪的研制开发

本文扼要地介绍了新型器件在中、高档Ｂ超研制开发中的重要地位。首先介绍了ＰＬＤ、ＧＡ、ＳＣ等ＡＳＩＣ器件的简单原理、设计思想，指出了采用ＡＳＩＣ替代传统的ＳＳＩ／ＭＳＩ器件的优点以及在我国推广应用的困难。其后，文章又介绍了数字信号处理、图象处理及计算机专用芯片的基本情况。最后提出了对ＰＬＤ、ＳＣ、ＧＡ等ＡＳＩＣ器件和ＤＳＰ、图象处理以及计算机专用芯片在中、高档Ｂ超中进行应用研究的建议和设想。     

基于特征的零件数据模型及其应用

ＣＡＰＰ是ＣＡＤ／ＣＡＭ集成的最有效途径。尽管在这方面做了大量研究和开发工作，但零件信息描述和工艺知识表达仍是目前亟待解决的问题。本文介绍一个基于特征的零件数据模型。详细叙述该模型的特征分类、数据结构、生成、特征有效性自动判断及其在工艺设计和数控编程中的应用。该数据模型采用ＡＣＩＳ实体几何造型系统和Ｃ＋＋实现。文章对采用该模型的ＣＡＤ／ＣＡＰＰ／ＣＡＭ集成系统的实现也作了描述。最后对该模型的应用范     

浅论商品销售包装开发的几个问题

浅论商品销售包装开发的几个问题诸鸿ＡＢＲＩＥＦＡＮＡＬＹＳＩＳＯＮＴＨＥＳＡＬＥＳＰＡＣＫＡＧＩＮＧＯＦＣＯＭＭＯＤＩＴＩＥＳ￥ＺｈｕＨｏｎｇＡｂｓｔｒａｃｔ：Ｓａｌｅｓｐａｃｋａｇｉｎｇｏｆｃｏｍｍｏｄｉｔｉｅｓ，ａｓａｎｙｏｔｈｅｒｔｈｉｎｇ，ｎ...     

CIMSCLASS—面向CIM的零件分类软件开发工具

介绍了一个能为工厂设置零件编码系统和开发零件分类系统的工具系统，该系统能适应用户的具体环境，能对零件的特征信息做较详细的描述和建立相应目标的零件分类系统，从而能在ＧＴ（成组技术）基础上为机械加工零件开发ＣＡＤ／ＣＡＰＰ／ＣＡＭ集成系统提供支持，以满足ＣＩＭＳ的需要。     

CIMSCLASS─—面向CIM的零件分类软件开发工具

介绍了一个能为工厂设置零件编码系统和开发零件分类系统的工具系统。该系统能适应用户的具体环境，能对零件的特征信息做较详细的描述和建立相应目标的零件分类系统，从而能在ＧＴ（成组技术）基础上为机械加工零件开发ＣＡＤ／ＣＡＰＰ／ＣＡＭ集成系统提供支持，以满足ＣＩＭＳ的需要。     

商品条码在包装中的定位与印刷

商品条码在包装中的定位与印刷陈克愚ＰＯＳＩＴＩＯＮＩＮＧＡＮＤＰＲＩＮＴＩＮＧＯＦＢＡＲＣＯＤＥＳＯＮＣＯＭＭＯＤＩＴＩＥＳ￥ＣｈｅｎＫｅｙｕＡｂｓｔｒａｃｔ：Ｂａｒｃｏｄｅｉｓｂｒｉｎｇｉｎｇａｂｏｕｔａｒｅｖｏｌｕｔｉｏｎｔｏｔｈｅｃｉｒｃｕｌａ...     

产品更改设计中尺寸数据传递流程分析

为了提高产品设计效率,从尺寸更改在零件间和零件内部关键结构间传播两个角度出发,探讨了产品更改设计过程中的尺寸数据传递流程。首先,分析了产品尺寸关联设计的基本逻辑结构,建立了更改传播逻辑元模型。然后,通过分析零件之间的装配关联及尺寸关联,建立了装配体中零件之间的关联路径以及尺寸关联更改传播模型;以变更零件为研究对象,基于零件建模过程,根据零件内部尺寸之间的连接与约束关系,建立了零件内部尺寸的更改传播路径,完成零件内部关键结构的尺寸更改传播;基于上述过程,完成了从更改源到零件直至零件内部特定尺寸的更改传播及其数据传递流程分析,最后,通过卷板机实例验证了所提方法的有效性。结果表明该方法可为产品的尺寸更改传播提供一种新的思路,为提高产品设计效率提供理论依据。     

Structure and Matrix Models for Tolerance Analysis from Configuration to Detail Design

A substantial amount of all quality problems that arise during assembly can be referred back to the geometrical design, and especially the geometrical concept of the product, i.e. the way in which parts are designed and located with each other. Special emphasis should thus be put on geometry design, especially during the early design phases, to try to find robust concepts and avoid solutions that may cause down-stream production problems.  This paper presents a generic set of evaluation tools for robust geometry design encountering (i) potential tolerance chain detection in configuration design, (ii) assembly robustness evaluation in concept design, and (iii) tolerance sensitivity analysis in detail design. Special attention is given to the development of a new matrix-based evaluation tool for the configuration design part. The tool presented is based on a new way of representing geometry variation constraints in an enhanced function-means tree structure model. Different parts of the function-means tree that are of interest for analysis purposes are then extracted and converted to matrix representation. The reason for doing this is that the structure model is most suitable for modeling, but becomes unsuitable for analysis as the model complexity increases. For this latter purpose, the matrix representation is far better. The use of the different tools is demonstrated in the design of a new vehicle front system for which the geometry a priori is unknown.     

基于定性立体模型的包装机械可装配/拆卸性分析

提出了一种包装机械可装配/拆卸性设计评价指标体系,该方法以定性的位置和形状为基本信息,通过分析零件的可移动性和移动方向,进行零件的装配/拆卸性分析.研究表明,使用该方法有利于推广应用高水平的包装机械可装配/拆卸性分析技术.     

装配体的参数化设计研究

通过参数化零件的数据关联分析,并将机械产品的装配模型抽象成两个两件的逐层级联关系,从而对零件模型数据进行装配适应性重构,建立起装配节点上的数据继承、传递和零件驱动关系,实现设计参数和几何模型参数的匹配和连接,从而达到整机产品的参数化设计目的,并以减速箱产品为实例,采用Pro/E系统实现了该装配体的参数化设计.     

小卫星装配建模与仿真的实现

采用基于模板的参数化特征建模方法，基于数据库驱动，主控零件驱动以及系统全关联数据结构的变形设计方法，基于装配规划和动画技术的装配仿真方法，基于多媒体技术和一次开发技术的用户界设计方法，在Pro/ENGINEER环境下实现了小卫星的参数化特征建模、变形设计、零件与装配的联动设计、装配仿真、干涉性检验和用户界面设计等。     

支持并行设计的特征设计系统研究

针对自上而下的计算机辅助机械产品图形设计，提出了适应这种设计思维的特征设计方法，即选择合适的形状特征，作为进一步的详细设计的基准，这种分层设计的方法，反映了所设计对象各个部分的内在逻辑关系，符合实际设计的思维方式，另外，对特征的概念做了简单的探讨，提出了设计分为结构设计和特征属性设计的观点，还简要探讨了应用二维特征进行设计的概念和方法。     

Concurrent optimal allocation of design and process tolerances for mechanical assemblies with interrelated dimension chains

Concurrent tolerance allocation has been the focus of extensive research, yet very few researchers have considered how to concurrently allocate design and process tolerances for mechanical assemblies with interrelated dimension chains. To address this question, this paper presents a new tolerance allocation method that applies the concept of concurrent engineering. The proposed method allocates the required functional assembly tolerances to the design and process tolerances by formulating the tolerance allocation problem into a comprehensive model and solving the model using a non-linear programming software package. A multivariate quality loss function of interrelated critical dimensions is first derived, each component design tolerance is formulated as the function of its related process tolerances according to the given process planning, both manufacturing cost and quality loss are further expressed as functions of process tolerances. And then, the objective function of the model, which is to minimize the sum of manufacturing cost and expected quality loss, is established and the constraints are formulated based on the assembly requirements and process constraints. The purpose of the model is to balance manufacturing cost and quality loss so that concurrent optimal allocation of design and process tolerances is realized and quality improvement and product cost reduction is achieved. The proposed method is tested on a practical example.     

支持设计过程的装配可行域划分和零件定位求解

提出了支持设计过程的六种装配约束 ,根据装配约束的结合条件划分出装配可行区域、装配可能区域和装配不可行区域 .在装配可行区域的零件的位置是直接确定的 .在装配可能区域零件的位置要根据它们的约束组合条件和几何数据进行解释 ,然后计算零件的位置和方向 .在装配不可行区域 ,零件的位置不能求解 .装配可行区域的划分和零件位置的确定可以极高的效率支持产品的设计过程     

Quality design of tolerance allocation for sheet metal assembly with resistance spot weld

Tolerance directly influences the functionality of the products and the related manufacturing costs, and tolerance allocation is of great importance for improving the assembly quality. However, the information required to allocate tolerances for complex 3D assemblies is generally not available at the initial design stage. In this paper, a new quality design methodology is developed, which makes use of both original design data obtained by the response surface methodology and the extra interpolation data obtained by the Kriging method. The finite element modelling is presented for the sheet metal assembly process as no explicit relationship of the variations for key characteristic points are available. The robust tolerances can be allocated based on the quality design model. A case study with the typical assembly process of the rear compartment pan and the wheelhouse is carried out in the paper, the tolerance allocation results show that the developed quality design methodology is capable of determining the robust manufacturing tolerance before assembly, which satisfies the product requirements. This method enables a robust tolerancing scheme to be used in the sheet metal assembly process.     

Modelling and analysis of selective assembly using Taguchi's loss function

An assembly is the integrative process of joining components to make a completed product. It brings together the upstream process of design, engineering and manufacturing processes. The functional performance of an assembled product and its manufacturing cost are directly affected by the individual component tolerances. But, the selective assembly method can achieve tight assembly tolerance through the components manufactured with wider tolerances. The components are segregated by the selective groups (bins) and mated according to a purposeful strategy rather than being at random, so that small clearances are obtained at the assembly level at lower manufacturing cost. In this paper, the effect of mean shift in the manufacturing of the mating components and the selection of number of groups for selective assembly are analysed. A new model is proposed based on their effect to obtain the minimum assembly clearance within the specification range. However, according to Taguchi's concept, manufacturing a product within the specification may not be sufficient. Rather, it must be manufactured to the target dimension. The concept of Taguchi's loss function is applied into the selective assembly method to evaluate the deviation from the mean. Subsequently, a genetic algorithm is used to obtain the best combination of selective groups with minimum clearance and least loss value within the clearance specification. The effect of the ratio between the mating part quality characteristic's dimensional distributions is also analysed in this paper.