逆向工程与快速成型技术应用研究

阐述了逆向工程与快速成型技术的基本概念,分析了逆向工程数据处理中的主要内容和逆向工程的关键技术与解决办法,介绍了逆向工程在快速成型中的应用.逆向工程与快速成型技术的结合,将使复杂型面的产品设计开发和快速成型周期进一步缩短.     

经济型快速成型技术的软件系统研究

提出了经济型快速成型系统的概念 ,研究开发了用于经济型快速成型技术的软件系统 ,并介绍了这一软件系统的开发过程和方法     

经济型快速成型技术的软件系统研究

提出了经济型快速成型系统的概念，研究开发了用于经济型快速成型技术的软件系统，并介绍了这一软件系统的开发过程和方法。     

基于Magics的激光快速成型三维CAD模型数据处理

Magics软件是快速成型行业中数据处理的通用软件.本文介绍了激光快速成型中基于Magics的三维CAD模型的数据处理技术,包括STL文件修复、产品的位置放置和支撑生成等.从而快速地获得精确的制造数据,并快速制得所需原型.     

逆向工程技术与快速成型技术在新产品开发中的应用

简要介绍了逆向工程技术和快速成型技术的基本概念、特点及关键技术，并且运用集成和系统的思想阐述了逆向工程技术与快速成型技术之间的关系。通过利用逆向工程软件Imageware对手机点云数据进行数据处理、曲面重构来举例说明逆向工程技术与快速成型技术在新产品开发中的应用。     

快速成型及快速制模技术

介绍快速成型技术的工艺过程，逆向工程数据处理流程，也介绍了快速制模技术的几种方法。     

台式快速成型系统的参数管理及其数据库技术

台式快速成型系统存在着大量与成型过程有关的参数 ,通过对参数管理数据库的研究与开发 ,可使参数管理更加有序、合理。选择关系数据模型及 Access数据库软件设计参数管理数据库概念模型及关系模型 ,并进行 3NF规范化处理。讨论了在 VC环境下使用 OL E DB技术实现参数管理数据库与台式快速成型软件系统的集成。集成后的软件系统可快速有效地对大量的模型参数进行管理 ,程序的运行效率得以提高 ,用户操作也得到了简化。     

提高快速成型技术中数据处理过程精度的研究综述

分析了快速成型技术中数据处理过程出现的台阶效应、STL逼近误差的来源及其对快速成型制造的影响,并就减小这些误差的国内外研究现状进行介绍、分析和讨论.     

基于快速成型的CAD模型数据转换之对比

数据处理与转换是快速成型制造的一个预处理环节,其中数据格式的选择决定着数据处理的流程和方法。文中介绍了STL、IGES和STEP等快速成型技术常用数据接口类型,并基于Pro/E系统进行了CAD模型的数据转换实验,从转换数据量的大小和误差等方面对不同数据格式的转换效果进行了对比分析。     

激光快速成型技术的软件系统

就激光快速成型技术的软件系统进行了深入的探讨，用系统方法和集成观点分析了软件的组成、结构、功能、实现及其相互间的依赖关系，为自行开发激光快速成型技术的软件系统奠定了理论基础。     

快速成型中封闭PS曲线边界补偿重建算法研究

对快速成型数据处理中封闭PS边界曲线补偿重建算法进行了研究,分析了已有的几种PS边界曲线补偿重建算法的特点。根据快速成型数据处理过程中截面多边形补偿的特点,提出了基于有效交叉点搜索的补偿边界重建的新算法;并在已开发的RP数据处理软件中成功应用,提高了该数据处理软件的稳定性。     

MEM产品开发及工艺研究

介绍了如何应用MEM快速成型技术(属于RP技术的一种)进行产品开发,根据实际情况设计了实验方案,对支撑条件进行了详细的分析,通过实际加工,利用现有的MEM-300-1快速成型机设备,针对常用零件的通用特征,得到了在加工工艺过程中不加支撑或尽量减少支撑的条件:开放式悬臂长度L≤6mm、倾斜形特征倾斜角度θ≥30°、圆孔半径R≤4 mm、平顶长度M≤8 mm.     

面向快速成形的复杂曲面重建技术研究

针对快速成形工艺特点,提出了一种基于实物的复杂曲面几何重 建的方法。由此直接生成的快速成形机优化STL接口文件,实现了反求容差与模型网格数的 最佳匹配,避免了由通用软件转换存在的错误和繁复,提高了成形设备的前处理效率,并为 反求工程与快速成形技术的有机集成提供了可靠途径。     

Rapid prototyping in dentistry: technology and application

Medical imaging has been used to provide information for diagnostic and therapeutic purposes. The use of physical models provides added values in these applications. Rapid prototyping (RP) techniques have long been employed to build complex 3D models in medicine. However, publications regarding the dental application of RP technologies are still rare. This paper reviews and discusses the basics and applications of RP techniques in dentistry: (1) construction of a computer aided design (CAD) model, including data acquisition, data processing, and the corresponding machines and CAD packages, (2) typical RP systems and how to choose them, and (3) current and potential use of RP techniques in dentistry. Practical application examples of RP techniques in dentistry are provided.     

Interface between CAD and Rapid Prototyping systems. Part 2: LMI — An improved interface

The STL (STereoLithography) file format, as developed by 3D Systems, has been widely used by most Rapid Prototyping (RP) systems and is supported by all major computer-aided design (CAD) systems. However, it is necessary to improve the STL format to meet the development needs of RP technologies. In Part 1, several existing and proposed formats have been discussed. This paper, Part 2, will present an improved interface between CAD and RP systems. The new interface is a file format that supports the STL format, removes redundant information in the STL format and adds topological information to balance storage and processing cost. In addition to supporting facet boundary models, the new interface supports precise models by using the edge-based boundary representation. This paper discusses the design considerations of the new interface and data structures for both facet models and precise models. Finally, a comparison of the new interface and the STL file format will be made.     

Software compensation of rapid prototyping machines

This paper addresses accuracy improvement of rapid prototyping (RP) machines by parametric error modeling and software error compensation. This approach is inspired by the techniques developed over the years for the parametric evaluation of coordinate measuring machines (CMM) and machine tool systems. The confounded effects of all errors in a RP machine are mapped into a “virtual” parametric machine error model. A generic artifact is built on the RP machine and measured by a master CMM. Measurement results are then used to develop a machine error function and error compensation is applied to the files which drive the build tool. The method is applied to three test parts and the results show a significant improvement in dimensional accuracy of built parts.     

三维实体零件分层处理软件的研究与开发

STL作为CAD与RP系统之间数据接口的事实标准，所有的RP系统都支持该数据接口。分层处理是目前快速成形制造的首要环节。该分层软件采用STL模型整体拓扑信息的分层处理思想，分层处理效率高。分析了分层处理软件的总体结构和各模块的功能，给出其流程图，最后，为三维实体零件在计算机坐标系和在快速制模设备坐标系中的坐标转换问题，提出新的解决方案。     

Rapid prototyping assisted surgery planning

In recent years, new surgical techniques have been developed to improve the quality of operations, reduce the risk to patients and reduce the pain experienced by patients. Prominent developments include minimally invasive surgery, robot-assisted hip operations, computer-assisted surgery (CAS) and virtual reality (VR). These developments have helped surgeons operate under difficult visual conditions.Rapid prototyping (RP) technology has also found applications in medicine. The RP technique is able to fabricate a representative, physical 3D model. This 3D model can enhance interpretation, visual and physical evaluation, and the rehearsal and planning of the surgical steps before a surgical operation is carried out in order to eradicate the trauma. This paper presents the procedures involved in the conversion of computerised tomography (CT) scan data to a useful physical model. A case study of a CT scanned file of a patient who had an injury to the right eye socket is presented. Three different RP systems (SLA, SGC and LOM) are benchmarked for comparison in terms of the surface finish, accuracies, visual appearance and processing speed.Because of the ability of RP to fabricate models that are complex in design with intricate features that may be hidden by undercuts, as demonstrated in this paper, the results of this research can be extended to applications in general engineering. One specific area of application would be reverse engineering.     

RE&RP一体化技术在工业设计中的应用研究

阐述了反求工程和快速成型的概念,论证了反求工程和快速成型技术一体化在现代工业设计中应用的意义和模式,并从扫描模型的建立、数据采集、数据处理、CAD模型的重建、产品的再设计与快速成型技术等方面,对反求工程和快速成型一体化具体应用过程进行了比较详细的分析和研究。将反求工程与快速成型一体化技术应用于现代工业设计中,改变传统的产品开发设计、制造模式,从而大大缩短产品开发周期。