支持4D打印的可控变形结构设计研究进展

4D打印是结合了3D打印技术和智能材料的一种智能结构增材制造技术。通过几何结构设计、智能材料分布设计,4D打印可以制备具有可调节形状、特性或功能的可控变形结构。可控变形结构通过外界的刺激,按设计好的特定方式发生形状、性能和功能的变化,从而使其满足不同领域的应用需求。对可控变形结构的二维结构设计方法和三维变形设计方法的技术研究进展进行综述,总结了支持4D打印的可控变形结构设计的突出成果以及创新性技术。结合4D打印的概念和支持4D打印的可控变形结构设计的研究现状,对其在机械、生物医学等领域的应用进行了展望。     

4D打印-智能材料的增材制造技术

本文主要针对4D打印-智能材料的增材制造技术展开深入剖析,旨在使4D打印技术能够被更加广泛地应用与认可。     

本期导读

4D打印,比3D打印多了一个“D”,也就是时间纬度,是指智能材料的增材制造。与3D打印的预先建模、扫描,然后使用物料成形不同,4D打印直接将设计内置到物料当中,简化了从“设计理念”到“实物”的造物过程,让人的想象力充分驰骋。     

基于增材制造的设计理论和方法研究现状

介绍了增材制造(3D打印)的概念和特点,并结合该技术的发展背景,从增材制造设计理念的形成、增材制造设计的基础晶胞单元结构研究和增材制造拓扑优化设计分析软件及应用等3个主要研究领域,详细介绍了基于增材制造的设计技术在国内外的发展现状及趋势,并结合我国航空航天产品的结构特点和发展趋势,对基于增材制造设计的研究方向提出了几点建议。     

基于3D打印技术的创意灯罩设计

3D打印作为一种快速成型技术的增材制造工艺而存在,它已颠覆人们传统的生活方式和思维模式。介绍了3D打印技术在国内外的发展现状,以及3D打印技术在当今职业教育中的发展情况;通过介绍一款3D打印的创意灯罩设计过程阐述其优势特点及存在的缺陷,说明将增材制造和传统减材制造工艺有机的融合在一起,才是制造行业发展的必经之路。     

增材制造(3D打印)技术发展

增材制造技术俗称3D打印技术,是近30年快速发展的先进制造技术,其优势在于三维结构的快速和自由制造,被广泛应用于新产品开发、单件小批量制造.本文介绍了增材制造技术设备和应用情况,阐述国内外增材制造技术发展现状,说明增材制造技术发展趋势和关键技术.     

3D打印与创新设计

正西安设计联合会邀请丝绸之路创新设计产业联盟理事长卢秉恒院士,作了题为"3D打印与创新设计"的报告。3D打印是增材制造的主流制造技术。从制造技术的分类来说,有增材制造、减材制造和等材制造,3D打印属于增材制造,是一种把材料累加起来的制造方式。这项技术的出现为制造技术行业带来一个全新的局面。3D打印技术为传统制造业带来巨大的变化,大大     

3D打印发展现状分析及展望

3D打印被认为是第三次工业革命的代表,其对材料的处理方式实现了从等材、减材到增材的转变,完全颠覆了传统加工制造行业减材制造的理念和模式,同时具有直接快速、个性化设计、无难度成型等特点,一直以来都是"智能制造"的重要研究课题之一。为此,本文从工艺技术、行业标准、市场规模等方面分析和归纳了3D打印在国内外的发展现状及存在问题,并对今后的研究方向提出了智能材料、绿色加工、数字化整合等发展趋势的展望,为我国3D打印行业的发展提供了一定的借鉴意义。     

浅谈3D打印技术的发展与应用

3D打印技术也称增材制造技术,是一种新兴的先进制造技术,它的发展会对现存制造业带来革命性的改变。文章简要介绍了3D打印技术与传统制造技术的区别,详细阐述了当前3D打印技术的工作原理与分类,并对3D打印技术的应用前景进行了综合分析。     

3D打印功能单元研究进展

3D打印技术是快速原型制造技术的一种,也被称为增材制造技术,被誉为"第三次工业革命"的核心技术。3D打印技术的强大优势使得越来越多的学者研究不同功能的复杂结构,以实现零件抗冲击、减震、高能量吸收等功能。本文综述了3D打印功能单元的研究现状,重点介绍了抗冲击与能量吸收结构、减震与降噪结构、散热结构、电磁结构等4种复杂功能单元的研究进展,并对几种功能单元的应用进行总结和展望。     

3D打印再制造目前存在问题与应对措施

3D打印技术是一种节材、节能且经济效益突出的绿色先进制造技术,已在金属零件直接成形、生物医疗等行业得到了广泛应用,但其在装备零部件再制造领域的应用目前还处于初级阶段。介绍了3D打印再制造的内涵,并通过对3D打印再制造技术流程的分析指出：相比3D打印直接制造,3D打印再制造涉及技术领域更广,过程更复杂;3D打印再制造目前还存在技术相对单一、设备便携性差、效率低下等问题。最后,针对这些问题,提出了构建一体化再制造软件系统、开发桌面化3D打印系统以及大力开展远程3D打印再制造等相应的应对措施。     

基于嵌入式技术的智能电网监控和关键技术

针对现有技术中智能电网监控系统数据速率慢,安全性较低的问题,本研究提出应用物联网技术来实现智能电网数据监控,在物联网技术中运用了5G无线时间同步通信技术,通过嵌入式技术实现数据采集,实现了对智能电网实时性监控的目的。利用半马尔可夫模型的智能电网算法来控制不同的电网数据,对电网数据实施统一化管理,有效的地增加了电网监控信息管理力度,提高了电网的安全性。实验结果表明,本研究的方法提高了电网监控信息的有效性,增加了电网的安全性能。     

彩色三维打印成形技术及应用

介绍了彩色三维打印(3DP)成形技术的工作原理及其成形工艺,分析了彩色三维打印的原型件的物理性能.此外,还介绍了彩色三维打印成形技术的应用.     

Development of micro-stereolithography technology using a UV lamp and optical fiber

Micro-stereolithography technology makes it possible to fabricate free-form three-dimensional (3D) microstructures using a focused UV beam with a very small focal diameter to solidify a UV-curable liquid photopolymer. Generally, expensive UV lasers and complex optical systems are required. However, in this study, we developed a more economical and simpler micro-stereolithography technology using a UV lamp as a light source and optical fiber as the light delivery system. We conducted photopolymer solidification experiments to examine the characteristics of the developed micro-stereolithography apparatus. To achieve an adequate solidification width and depth, a photostabilizer was mixed with a conventional photopolymer and then tested. The developed apparatus could be used to fabricate 3D microstructures by modifying the fabrication conditions for a given photopolymer. Several 3D microstructures were fabricated.     

A review on 3D printed matrix polymer composites: its potential and future challenges

The International Journal of Advanced Manufacturing Technology - Additive Manufacturing technology has a significant impact on the modern world because of its ability to fabricate highly complex...     

Review of dynamic issues in micro-end-milling

In recent years, the miniaturization of products has become a trend all over the world. Besides conventional precision manufacturing technology and micro-electro-mechanical systems (MEMS), micro/meso mechanical manufacturing (M⁴) technology is regarded as another choice for an effective method to fabricate micro complicated 3D features, which need special attention paid to. In micro-end-milling machining, the stiffness of a micro-end-milling machine tool is somewhat lower, due to the size effect of material, and also, obviously, the ploughing condition and the quite slender end-milling tool. Thus, the stability of a micro-end-milling machine is very weak. This paper reviews the state-of-the-art of studying chip formation and dynamic problems in micro-end-milling, and discusses the possible future works in this field.     

Additive manufacturing of smart insole by direct printing of pressure sensitive material

3D printing technology is gaining attention as one of the key technologies that will lead the fourth industrial revolution. In addition, the field of application is from trial production to mass production of products. However, in many cases, the application area is limited to the geometrical shape building of products. This paper shows an example of application technology for manufacturing the smart insole by applying 3D printing technology for the purpose of giving various functions as well as making geometric shape. In the production of smart insole, 3D printing technology is applied to direct printing of pressure sensitive sensor and highly conductive wire as well as flexible insole object itself. The materials used in the production of flexible products, conductors and sensor are different, and in order to produce the sensor by 3D printing, suitable materials have been directly manufactured and used. This paper shows that the 3D printing technology can be directly applied to the manufacturing of multi functional products through the above manufacturing process as well as the experimental results after the actual production.

     

3D打印机控制系统的开发

3D打印技术起源于20世纪80年代,最近几年发展较为迅速。国外由于起步较早,所以技术发展相对成熟,中国在3D打印技术方面起步较晚,但某些技术也已进入世界前列。文中主要从3D打印技术控制系统方面进行了开发。控制系统主要包括硬件电路系统和软件驱动系统。     

Processing capabilities of micro ultrasonic machining for hard and brittle materials: SPH analysis and experimental verification

Micro ultrasonic machining (micro-USM) is an unconventional micromachining technology that has capability to fabricate high aspect ratio micro-holes, intricate shapes and features on various hard and brittle materials. The material removal in USM is based on brittle fracture of work materials. The mechanical properties and fracture behaviour are different for varied hard and brittle materials, which would make a big difference in the processing capability of micro-USM. To study the processing capability of USM and exploit its potential, the material removal of work materials, wear of abrasive particles and wear of machining tools in USM of three typical hard and brittle materials including float glass, alumina, and silicon carbide were investigated in this work. Both smoothed particle hydrodynamics (SPH) simulations and verification experiments were conducted. The material removal rate is found to decrease in the order of glass, alumina, and silicon carbide, which can be well explained by the simulation results that cracking of glass is faster and larger compared to the other materials. Correspondingly, the tool wear rate also dropped significantly thanks to the faster material removal, and a formation of concavity on the tool tip center due to intensive wear was prevented. The SPH model is proved useful for studying USM of different hard and brittle materials, and capable of predicting the machining performance.     

基于BIM的智慧楼宇系统设计与应用

随着科技的不断进步,城市信息化建设得到了大力发展,传统建筑逐步迈向智慧楼宇并实现集成管理,建筑信息模型BIM(Building Information Model)为智慧楼宇系统的建设提供了技术和数据支撑,为智慧楼宇集成管理系统设计提供了条件,本文通过BIM与智慧楼宇相结合,详细介绍了系统的组成架构及相关部分功能。该系统具有信息共享、协同化管理的特点,其推广应用为智慧楼宇的管理带来极大便利,有效提高了楼宇运维系统的集成化和管理的高效化,具有很好的应用前景和现实的应用价值。