检索结果-南通市图书馆

Advances in selective laser sintering of polymers

International Journal of Extreme manufacturing 2022年第4期4卷 20-56页

作者： Wei Han Lingbao Kong Min Xu Shanghai Engineering Research Center of Ultra-Precision Optical manufacturing Department of Optical Science and EngineeringFudan UniversityShanghai 200433People’s Republic of China

Polymers are widely used materials in aerospace,automotive,construction,medical devices and *** are being promoted rapidly due to their ease of manufacturing and improved material *** on polymer processing technology should be paid more attention to due to the increasing demand for polymer *** laser sintering(SLS)uses a laser to sinter powdered materials(typical polyamide),and it is one of the critical additive manufacturing(AM)techniques of *** irradiates the laser beam on the defined areas by a computer-aided design three-dimensional(3D)model to bind the material together to create a designed 3D solid *** has many advantages,such as no support structures and excellent mechanical properties resembling injection moulded parts compared with other AM ***,the ability of SLS to process polymers is still affected by some defects,such as the porous structure and limited available types of SLS ***,this article reviews the current state-of-the-art SLS of polymers,including the fundamental principles in this technique,the SLS developments of typical polymers,and the essential process parameters in ***,the applications of SLS are focused,and the conclusions and perspectives are discussed.

关键词： selective laser sintering additive manufacturing laser powder bed fusion 3D printing polymer

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Subsurface Defect Evaluation of Selective-laser-Melted Inconel 738LC Alloy Using Eddy Current Testing for additive/subtractive Hybrid manufacturing

引用

Chinese Journal of Mechanical Engineering 2021年第6期34卷 224-239页

作者： Sai Guo Guanhui Ren Bi Zhang Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhenGuangdongChina State Key laboratory of Ultra-precision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityKowloonHong KongChina

New materials and manufacturing technologies require applicable non-destructive techniques for quality assurance so as to achieve better *** study comprehensively investigated the effect of influencing factors includ-ing excitation frequency,lift-off distance,defect depth and size,residual heat,and surface roughness on the defect EC signals of an Inconel 738LC alloy produced by selective laser melting(SLM).The experimental investigations recorded the impedance amplitude and phase angle of EC signals for each defect to explore the feasibility of detecting sub-surface defects by merely analyzing these two key ***,this study revealed preliminary qualitative and roughly quantitative relationships between influencing factors and corresponding EC signals,which provided a prac-tical reference on how to quantitively inspect subsurface defects using eddy current testing(ECT)on SLMed parts,and also made solid progress toward on-line ECT in additive/subtractive hybrid manufacturing(ASHM)for fabricating SLMed parts with enhanced quality and better performance.

关键词： Eddy current testing Subsurface defect additive/subtractive hybrid manufacturing Selective laser melting Inconel 738LC alloy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Direct Toolpath Constructive Design Method for Controllable Porous Structure Configuration with a TSP-based Sequence Planning Determination

引用

Chinese Journal of Mechanical Engineering(additive manufacturing Frontiers) 2023年第1期2卷 34-46页

作者： Zhiping Wang Yicha Zhang Donghua Dai Dongdong Gu Chaoyue Chen Di Wang Alain Bernard Laboratoire des Sciences du Numérique de Nantes(LS2N) Nantes44321France Nantes Université Ecole Centrale de NantesNantes44321France Universitéde Technologie Belfort-Montbéliard(UTBM) ICB-COMMSevenans90400France Jiangsu Provincial Engineering laboratory for laser additive manufacturing of High-Performance Metallic Components College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing210016China State Key laboratory of Advanced Special Steels School of Materials Science and EngineeringShanghai UniversityShanghai200444China School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou510641China

The inherent capabilities of additive manufacturing(AM)to fabricate porous lattice structures with controllable structural and functional properties have raised interest in the design methods for the production of extremely in-tricate internal *** popular methods of porous lattice structure design still follow the traditional flow,which mainly consists of computer-aided design(CAD)model construction,STereoLithography(STL)model conversion,slicing model acquisition,and toolpath configuration,which causes a loss of accuracy and manufac-turability uncertainty in AM preparation ***,toolpath configuration relies on a knowledge-based approach summarized by expert *** this process,geometrical construction information is always ignored when a CAD model is created or *** fully use this geometrical information,avoid accuracy loss and ensure qualified manufacturability of porous lattice structures,this paper proposes a novel toolpath-based con-structive design method to directly generate toolpath printing file of parametric and controllable porous lattice structures to facilitate model data exchange during the AM preparation *** optimize the laser jumping route between lattice cells,we use a hybrid travelling salesman problem(TSP)solver to determine the laser jumping points on contour *** kinds of laser jumping orders are calculated and compared to select a minimal laser jumping route for sequence planning inside lattice ***,the proposed method can achieve high-precision lattice printing and avoid computational consumption in model conversion stages from a geomet-rical *** optical metallographic images show that the shape accuracy of lattice patterns can be *** existence of“grain boundaries”brought about by the multi-contour scanning strategy may lead to different mechanical properties.

关键词： Design for additive manufacturing Toolpath-based constructive design Porous structure Sequence planning

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

3D printing of glass by additive manufacturing techniques:a review

引用

Frontiers of Optoelectronics 2021年第3期14卷 263-277页

作者： Dao ZHANG Xiaofeng LIU Jianrong QIU State Key laboratory of Modem Optical Instrumentation and School of Optical Science and Engineering Zhejiang UniversityHangzhou 310027China School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Huazhong University of Science and Technology Wuhan National Laboratory for OptoelectronicsWuhan 430074China

additive manufacturing(AM),which is also known as three-dimensional(3D)printing,uses computer-aided design to build objects layer by ***,we focus on the recent progress in the development of techniques for 3D printing of glass,an important optoelectronic material,including fused deposition modeling,selective laser sintering/melting,stereolithography(SLA)and direct ink *** compare these 3D printing methods and analyze their benefits and problems for the manufacturing of functional glass *** addition,we discuss the technological principles of 3D glass printing and applications of 3D printed glass *** review is finalized by a summary of the current achievements and perspectives for the future development of the 3D glass printing technique.

关键词： three-dimensional(3D)printing glass fused deposition modeling(FDM) selective laser sintering/melting(SLS/SLM) stereolithography(SLA) digital light processing(DLP) direct ink write(DIW) optical devices microfluidic

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：