计算机软件建模结合3D打印技术教学探索研究

随着时代的不断发展,科技不断进步,现代3D打印技术越来越高超,仿真效果较高,应用范围较广。目前,国内各大高校的3D打印课程仍处于探究和摸索阶段,不能发挥3D打印技术的功能与价值。从教学的角度来说,3D打印技术能够辅助学生学习计算机设计、数控、建模等专业课程。基于此,主要结合3D打印技术,围绕计算机软件建模进行教学探究。     

新型回转式曲面分层 3D 打印机设计与实验研究

3D 打印技术在航天、军工、机器人等领域应用广泛，但也存在诸多问题，如阶梯效应所带来的叠层误差、2.5D 制造原理导致的打印零件各向异性、支撑结构的打印及后处理导致的耗时和耗能等问题。针对上述不足，该文提出一种回转式曲面分层 3D 打印方法，对多自由度回转式 3D 打印设备的设计方法进行研究，通过构型综合和尺度综合确定了打印机构型及结构参数，提出了曲面打印路径规划方法。通过联合仿真与样机实验，验证了 3D 打印设备构型综合与尺度设计的有效性，为打印装备创新设计、曲面打印过程规划策略及相关实验研究提供了新思路。     

利用三维技术在阀门快速研发中的应用

使设计人员可以快速搭建三维数字模型、内置三维打印设备,支持把设计完成的三维模型进行3D打印输出,实现三维设计和三维打印的整合,通过3D打印技术间接制造模具,用快速成型模型作为母模,翻制快速经济模具。     

3D打印技术在计算机建模教学中的应用

3D打印技术是一种检测模型设计效果与制作效果的辅助技术,近年来,在计算机建模教学中应用十分广泛。笔者分析了3D打印技术在计算机建模教学中的应用,应用3D打印技术可以提高计算机建模教学质量,并且激发了学生学习3D建模的兴趣。     

手绘画3D 打印书签的制作

该文从身边随手可得的书签制作入手,介绍3D打印技术的普及和生活化。并结合实际的制作对具体的实现技术进行描述,介绍了利用绘图工具设计图案,利用3DS MAX进行三维模型建模,最后利用3D打印设备将数字三维模型打印成实物。     

探讨3D打印在UG软件教学中的应用

UG软件逐渐在中小企业普及,它的推广与使用大大缩短了产品的设计周期,基于目前企业对UG应用人才的需求,许多高校都开设了UG软件这门课程,但毕业生的产品设计及机械创新能力还不能很好地满足社会工作岗位对相关技术和能力的需求。3D打印是最近两年开始流行的一种快速成形技术,本文介绍了熔融沉积型3D打印的工作原理及特点,探讨将3D打印技术引入UG软件教学中,提高学生的动手能力、学习积极性和创新性,进一步激发学生对产品设计的兴趣。     

基于互联网+3D打印训练创新的教学平台自主设计

随着科学技术的发展,我国已经进入信息化时代,“互联网+”已经成为现代社会发展的趋势,信息化人才和创新性人才是当代信息化社会所需要的。对于信息化技术人才的培养,职校教学当仁不让,互联网教学已经被引入教学,但从目前来看,我国的高职教学还没有形成专业的技术共享平台,学生的3D打印技术训练还存在一定的不足。为解决这些不足,文章对基于互联网+3D打印训练创新的教学平台设计进行分析,以供参考。     

3D智造引爆京城高校

2016年5月18日，以“3D打印梦想，创业·就业·未来”为主题的3D打印培训高校巡讲活动在北京印刷学院举办。活动包括“精彩创意，3D智造”3D打印创意设计大赛、2016届北京印刷学院工业设计毕业设计展和3D打印宣讲。出席活动的有震旦集团3D事业部总监林丰论、北京市计算中心市场部副经理朱长红、大璞三维科技有限公司总经理杨途军、大业三维总经理姚志锋以及印刷学院相关领导等。     

3D打印中的几何计算研究进展

3D打印技术改变了传统的减式材料制造模式,带来了制造工艺和生产模式的变革,有力地推动了3D数字化相关技术与研究的发展.文中从3D打印的社会背景与理论背景出发,介绍了3D打印技术的分类、原理与过程.以此为基础,对近几年的3D打印中的几何计算问题给出了全面的综述,根据问题特点将其分为几何优化、结构分析、材料表面效果定制、机构设计、自支撑结构设计、内部结构设计等六大类,并对每一类作了详细的分类介绍,最后对其发展方向作了初步展望.     

基于模糊PID算法的3D打印后处理系统

随着3D打印技术的快速发展,使其在数字产品模型制造领域的应用逐步成为一种潮流和热门的话题。基于FDM快速成型技术的桌面级3D打印设备的正在走向成熟,使用、维护简单,价格竞争力强。但是由于FDM技术的技术特点,打印出来的产品表面精度较低。针对FDM成型技术的不足,设计了一种基于模糊PID控制的3D打印后处理系统,通过模糊规则对PID的参数进行自整定,实现对3D打印后处理装置中加热温度的控制,使打印模型的抛光效果达到最佳。仿真结果表明：该控制系统稳定性好,控制精度高,响应速度快。     

Three‐dimensional printing technologies for terahertz applications: A review

Three‐dimensional (3D) printing technologies enables fast prototyping of complex 3D objects with ever improving printing qualities. To date, 3D printing has been found useful in areas such as manufacturing, industrial design, aerospace, dental and medical industries, and many others. In this article, we review recent advances of 3D printing technologies for terahertz (THz) applications. Different 3D printing technologies and printable materials are first discussed and compared. 3D‐printed THz components and devices, which are categorized as waveguides/fibers, antennas, and quasi‐optical components, are further demonstrated. It is found that the performances and functionalities of 3D‐printed THz devices have been greatly enhanced, while the operating frequencies have been increased from the lower end of THz range to over 1 THz region. With further development of novel materials and printing techniques, it is believed that 3D printing technologies will play an important role in the realization of THz components for efficient control and manipulation of THz waves.     

3D打印技术过程控制问题研究进展

3D打印技术是一种新兴的增材制造技术,许多人认为是一项将要改变世界的“破坏性”技术,并声称该技术将引发新一轮工业革命.本文根据3D打印技术涉及的不同核心成型技术、材料和设备体积等,介绍了3D打印技术的不同分类,综述了主流3D打印过程控制技术,指出了3D打印技术的控制系统存在的问题并提出了产业化进程中的建议和意见.     

全彩3D打印颜色再现方法

全彩3D打印具有快速再现彩色原型的优势, 已经开始广泛应用于医疗、工业、食品等多个领域. 这些领域对3D打印产品的颜色再现精度要求越来越高, 如何提高全彩3D打印产品的颜色再现质量成为研究热点问题之一. 本文对全彩3D打印的颜色再现方法进行了较为全面的论述. 在对全彩3D打印实现方式分类的基础上, 重点对全彩3D打印颜色再现中的颜色转换和打印输出模型两种核心技术进行分析, 探讨现有方法的优势与不足, 在此基础上论述了全彩3D打印的发展趋势.     

An Interactive Designing System with Virtual Sculpting and Virtual Woodcut Printing

In this paper, we propose an interactive designing method and a system based on it to create 3D objects and 2D images. This system consists of two subsystems for virtual sculpting to create a 3D shape and virtual printing to produce a picture with a printing block. In the virtual sculpting subsystem, a user can form solid objects with curved surfaces as if sculpting them. The user operates virtual chisels, and can remove or attach arbitrary shapes of ellipsoids or cubes from or to the workpiece. A 3D object generated by virtual sculpting looks like a real wooden sculpture. If using a board as a workpiece, a user can generate a virtual printing block. In the virtual printing subsystem, a user can synthesize a woodcut printing image from the virtual printing block mentioned above, a virtual paper sheet, and a printing brush. The user can synthesize a realistic woodcut print with a procedure similar to the actual woodcut printing.     

3D printing: an emerging tool for novel microfluidics and lab-on-a-chip applications

In the past few years, 3D printing technology has witnessed an explosive growth, penetrating various aspects of our lives. Current best-in-class 3D printers can fabricate micrometer scale objects, which has made fabrication of microfluidic devices possible. The highest achievable resolution is already at nanometer scale, which is continuing to drop. Since geometric complexity is not a concern for 3D printing, novel 3D microfluidics and lab-on-a-chip systems that are otherwise impossible to produce with traditional 2D microfabrication technology have started to emerge in recent years. In this review, we first introduce the basics of 3D printing technology for the microfluidic community and then summarize its emerging applications in creating novel microfluidic devices. We foresee widespread utilization of 3D printing for future developments in microfluidic engineering and lab-on-a-chip technology.     

面向云制造平台的模型修复算法及任务调度算法的研究

随着三维打印技术的发展,面向3D打印服务的云制造平台也得到快速发展,改变着传统的制造模式。然而目前的云制造平台也面临着诸多问题,针对目前存在的模型修复难度高及任务不能合理调度的问题,本文提出了保特征的模型修复算法和基于遗传算法的任务调度算法,并通过实验和仿真验证了算法的有效性。为了更好的体现算法效果,本文搭建了一个基于分布式制造的云制造平台,该平台配合模型自动修复算法以及基于遗传算法的任务调度算法,为用户提供低门槛、高效、优质的3D打印服务。     

各向同性三角形重新网格化方法综述

三维网格模型的重新网格化是计算机图形学中的重要内容,是许多几何应用的关键组成部分。近年来迅速发展的三维处理技术,如有限元模拟、计算机动画、三维打印等,对网格质量的要求不断提升,促进了三维网格模型重新网格化的持续发展,由此产生了许多新的重新网格化技术。首先介绍了三角形网格质量评估的标准,然后概述了各向同性重新网格化的最新进展,并详细研究和比较了各种重新网格化算法的优缺点,最后对未来的研究提出了新的问题与方向。     

Digital Fabrication Techniques for Cultural Heritage: A Survey

Digital fabrication devices exploit basic technologies in order to create tangible reproductions of 3D digital models. Although current 3D printing pipelines still suffer from several restrictions, accuracy in reproduction has reached an excellent level. The manufacturing industry has been the main domain of 3D printing applications over the last decade. Digital fabrication techniques have also been demonstrated to be effective in many other contexts, including the consumer domain. The Cultural Heritage is one of the new application contexts and is an ideal domain to test the flexibility and quality of this new technology. This survey overviews the various fabrication technologies, discussing their strengths, limitations and costs. Various successful uses of 3D printing in the Cultural Heritage are analysed, which should also be useful for other application contexts. We review works that have attempted to extend fabrication technologies in order to deal with the specific issues in the use of digital fabrication in the Cultural Heritage. Finally, we also propose areas for future research.     

3D打印模型版权保护技术研究进展

目的 近年来3D打印模型的版权标注和保护引起了研究者的关注,为了全面反映3D打印模型版权保护研究的现状和最新进展,本文对国内外公开发表的主要文献进行了梳理和分析。方法 首先在广泛文献调研的基础上,描述3D打印模型文件和3D打印模型攻击类型,分析3D打印和扫描过程对模型的影响。然后对3D打印模型的版权保护策略进行分类,详细阐述每类方法的基本框架和相关技术特征。最后根据相关文献,将3D打印数字水印方法与传统网格水印算法和抗3D打印—扫描攻击的性能进行比较。结果 基于物理特性的3D模型版权保护技术能对3D打印后的模型嵌入有效的具有一定隐蔽性的版权标识,但在提取微结构体等信息时需要借助一些专用设备,不具有普适性。基于数字水印的方法既能抵抗传统的数字模态下的相似性变换、剪切、噪声、细分、量化、光顺等攻击,又能有效抵抗3D模型的数/模等模态转换攻击,并且高精度的3D打印机和扫描仪能有效提高水印的检测率。结论 3D打印产品是设计者和生产企业的智慧和心血的结晶,包含知识产权。随着3D打印在工业领域的广泛应用,3D打印模型版权保护有着广阔的应用前景和研究价值,但目前针对3D打印模型的版权保护的检测和评估机制存在一些局限性,未来需要构建统一的3D打印模型测试库和3D打印模型水印评测体系。     

Hybrid simulation models for spare parts supply chain considering 3D printing capabilities

In the era of Industry 4.0, 3D printing unlocks a wide array of solutions to rapidly-produce spare parts for maintenance operations. In this research, we propose a hybrid simulation approach, combining agent-based and discrete event simulation methods, to investigate how the adoption of 3D printing technologies to manufacture spare parts for maintenance operations will improve operational efficiency and effectiveness. Specifically, our framework is applied to the United States Navy’s fighter jet maintenance operations to study various network configurations, where 3D printing facilities may be centralized, decentralized, or hub configured. System performance in terms of the total cost, timeliness of delivery, and vulnerability under disruptions such as cyber-attacks and emergencies are evaluated. Lastly, the impact of 3D printing technological advancements on operational performance is investigated to obtain managerial insights.