检索结果-南通市图书馆

Ultrasonic measurement of tie-bar stress for die-casting machine

Frontiers of Mechanical Engineering 2022年第1期17卷 188-201页

作者： Chaojie ZHUO Peng ZHAO Kaipeng JI Jun XIE Sheng YE Peng CHENG Jianzhong FU The State Key Laboratory of Fluid Power and Mechatronic Systems College of Mechanical EngineeringZhejiang UniversityHangzhou 310027China The Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province College of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Ningbo Haitian die-casting Equipment Co. Ltd.Ningbo 315821China

In die casting,the real-time measurement of the stress of the tie-bar helps ensure product quality and protect the machine ***,the traditional magnetic-attached strain gauge is installed in the mold and product operating area,which hinders the loading and unloading of the mold and the collection of die *** this paper,a method for real-time measurement of stress using ultrasonic technology is *** stress variation of the tie-bar is analyzed,and a mathematical model between ultrasonic signal and stress based on acoustoelastic theory is *** experiments show that the proposed method agrees with the strain gauge,and the maximum of the difference square is only 1.5678(MPa)***,single-factor experiments are conducted.A higher ultrasonic frequency produces a better measurement accuracy,and the mean of difference squares at 2.5 and 5 MHz are 2.3234 and 0.6733(MPa)_(2),*** accuracy is insensitive to probe location and tonnage of the die-casting ***,the ultrasonic measurement method can be used to monitor clamping health status and inspect the dynamic pulling force of the *** approach has the advantages of high precision,high repeatability,easy installation,and noninterference,which helps guide the production in die casting.

关键词： die-casting tie-bar stress acoustoelastic theory ultrasonic measurement dynamic inspection

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

Code generation and recognition using a modified ejection system in die-casting process

引用

China Foundry 2020年第5期17卷 364-371页

作者： Jaekyung Song Jeongsu Lee Young Chul Lee Byoung Jun Lee Chaeho Lim Industrial Materials and Smart Manufacturing Engineering Korea University of Science and TechnologyDaejeon CityRepublic of Korea Digital Manufacturing Process Group Korea Institute of Industrial TechnologyGyeonggi-doRepublic of Korea

A code-generation and recognition technology that uses a modified ejection system in the diecasting process is *** achieve the highest level of quality management,the first requirement in the manufacturing process is to establish a product management system according to the specific product ***,a method to individually identify each product,such as a barcode or QR code,is required during the production *** manufactured in the die-casting process always have ejector pin(EP)***,an ejection system was modified to generate a unique code using EP *** ejection system has two features:an EP with a modified head to show the direction of rotation,and a function to dependently rotate EPs(five or six EPs)with a constant *** EPs are numbered according to the rotation ***,the EP marks can be viewed as a five-or six-digit code.A program was also developed to individually identify the products by automatically detecting and reading the EPs using deep learning-based object detection and classification technology.

关键词： code recognition die-casting ejection system object detection product management smart manufacturing

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 review of magnesium die-castings for closure applications

引用

Journal of Magnesium and Alloys 2019年第2期7卷 297-304页

作者： J.P.Weiler Meridian Lightweight Technologies Canada

Vehicle mass reduction in the automotive industry has become an industry-wide *** fuel efficiency and greenhouse gas emission targets for engine-powered vehicles,and ambitions for extended range electric vehicles have motivated these reductions in vehicle *** reduction opportunities in structural automotive applications are increasingly realized through lightweight alloy castings,such as magnesium,primarily due to the ease of component *** traditional benefits of magnesium die-castings including lightweighting and associated compounded mass savings,excellent strength-to-weight ratio,part consolidation,near net-shape forming,dimensional repeatability,and integration of additional components can be realized in closure *** recent example is the application of a magnesium die-casting for the structural inner of the liftgate in the 2017 Chrysler Pacifica,replacing nine parts in the previous generation and resulting in a liftgate assembly weight reduction of nearly 50%.The work presented here reviews past and current developments of magnesium die-castings in closure applications and discusses the benefits and challenges of magnesium alloys for these applications,including casting design,corrosion and fastening strategies,and the manufacturing design and assembly methodologies.

关键词： die-casting Automotive applications Closures Lightweighting

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

An Industrial Perspective on Magnesium Alloy Wheels: A Process and Material Design

引用

Materials Sciences and Applications 2023年第1期14卷 20-44页

作者： Miaomiao Wang China Copper Institute of Engineering and Technology Beijing China Kunming Metallurgical Research Institute Co. Ltd. Beijing Branch Beijing China

Light weights wheels improve vehicle performance with respect to road handling, cornering as well providing fuel economy and reduced greenhouse gas emissions. Aluminum wheels are currently used in many models and are produced usually by low pressure assisted gravity casting. Important property requirements are fatigue strength, pressure tightness, tensile strength, impact resistance, and corrosion resistance. Many attempts have been made to convert aluminum road wheels to magnesium. Race cars and some of the high end models (Porsche, Ferrari, etc.) have used magnesium wheels. These wheels have been gravity cast or forged. Viable corrosion protection systems have been developed and magnesium wheels have been used with success on these models. To use magnesium on more modest models is a challenge due to cost issues. Higher productivity casting processes or more cost effective coating systems need to be utilized. The project consists of selecting magnesium alloys for road wheels, examining the possible cost effective casting processes and corrosion protection systems, evaluating the cost per one wheel and comparing it to aluminum wheel costs. The wheels will also be compared with respect to fatigue and impact properties, pressure tightness, and corrosion.

关键词： Manufacturing Process die-casting Corrosion Resistance Economic Viability

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

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：