检索结果-南通市图书馆

Milling surface roughness for 7050 aluminum alloy cavity influenced by nozzle position of nanofluid minimum quantity lubrication

引用

Chinese Journal of Aeronautics 2021年第6期34卷 33-53页

作者： Zhenjing DUAN Changhe LI Yanbin ZHANG Lan DONG Xiufang BAI Min YANG Dongzhou JIA Runze LI Huajun CAO Xuefeng XU School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China School of Mechanical and Electrical Engineering Qingdao Binhai UniversityQingdao 266555China School of Mechanical Engineering Inner Mongolia University for NationalitiesTongliao 028000China Department of Biomedical Engineering University of Southern CaliforniaCA90089-1111 Los AngelesU.S.A. State Key Laboratory Mechanical Transmiss Chongqing UniversityChongqing 400044China Zhejiang University of Technology Hangzhou 310032China

In nanofluid minimum quantity lubrication(NMQL)milling of aviation aluminum alloy,it is the bottleneck problem to adjust the position parameters(target distance,incidence angle,and elevation angle)of the nozzle to improve the surface roughness of milling,which has large and uncontrollable *** this paper,the influence law of milling cutter speed,helical angle,and cavity shape on the flow field around the milling cutter was studied,and the optimal nozzle profile parameters were *** 7050 aluminum alloy as the workpiece material,the milling experiment of the NMQL cavity was conducted by utilizing cottonseed oil-based Al2 O3 *** show that the high velocity of the surrounding air flow field and the strong gas barrier could be attributed to high rotating velocities of the milling *** incidence angle of the nozzle was consistent with the helical angle of the milling cutter,the target distance was appropriate at 25–30 mm,and the elevation angle was suitable at 60°–65°.The range and variance analyses of the signal-to-noise ratio of milling force and roughness were performed,and the chip morphology was observed and *** results show that the optimal combination of nozzle position parameters was the target distance of 30 mm,the incidence angle of 35°,and the elevation angle of 60°.Among these parameters,target distance had the largest impact on cutting performance with a contribution rate of more than 55%,followed by incidence angle and elevation contribution *** by orthogonal experiment revealed that the nozzle position parameters were appropriate,and Ra(0.087 lm)was reduced by 30.4%from the maximum value(0.125 lm).Moreover,Rsm(0.05 mm)was minimum,which was 36%lower than that of the seventh group(Rsm=0.078 mm).

关键词： 7050 aluminum alloy Milling Milling force Nanofluid minimum quantity lubrication Nozzle position orthogonal experimental Roughness SNR

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

Study on the performance of lightweight roadway wall thermal insulation coating containing EP-GHB mixed ceramsite

引用

Building Simulation 2024年第5期17卷 785-798页

作者： Yongliang Zhang Shili Yin Hongwei Mu Xilong Zhang Qinglei Tan Bing Shao Key Lab of Industrial Fluid Energy Conservation and Pollution Control Ministry of EducationQingdao University of TechnologyQingdaoShandong266520China College of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdaoShandong266520China

As the mining depth increases,the problem of high-temperature thermal damage mainly caused by heat dissipation of surrounding rock is becoming more and more *** is very important to solve the environmental problem of mine heat damage to improve the efficiency of mineral resource exploitation and protect the physical and mental health of *** can apply thermal insulation coating on the walls of mine roadways as a means of implementing active heat *** this paper,expanded perlite(EP)and glazed hollow bead(GHB)are used as the main thermal insulation materials,ceramsite and sand as aggregate,plus glass fiber and sodium dodecyl sulfate to develop a new lightweight composite thermal insulation coating through orthogonal experiment *** to the plate heat flow meter method and mechanical test method,the thermal insulation and mechanical properties of EP-GHB mixed ceramsite coating were studied by making specimens with different parameter ratios,and according to the analysis of the experimental results,the optimal mix ratio of the coating was *** addition,Fluent numerical simulation software was used to establish the roadway model,and the thermal insulation effect of the coating in the roadway under different working conditions was *** results show that the thermal conductivity of the prepared composite thermal insulation coating material is only 8.5% of that of ordinary cement mortar,and the optimal thickness of adding thermal insulation coating is 0.2 m,which can reduce the outlet air temperature of the roadway with a length of 1000 m by 4.87 K at this *** thermal insulation coating developed in this study has the advantages of simple technology and strong practicability,and has certain popularization and application value in mine heat damage control.

关键词： high-temperature mine thermal insulation coating orthogonal experimental optimal fit ratio numerical simulation

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

Preparation of Tungsten-copper Composite Powder by Electroless Plating

Preparation of Tungsten-copper Composite Powder by Electrole...

引用

中国材料大会2012

作者： Ying Wang Juntao Zou Qinghe Zhang School of Materials Science and Engineering Xi’an University of Technology

ISBN: (纸本)9783037856093;3037856092

In this paper,tungsten-copper composite powder was prepared on the particle size of 6 ～ 10μm tungsten powder surface by electroless copper *** orthogonal experimental results show that the primary and secondary order of factors affecting the deposition rate followwing the sequence:copper sulfate solution concentration ＞ pH value＞ solution temperature＞ formaldehyde concentration ＞ complexing agent *** process of the electroless copper plating on the tungsten powder surface was investigated,and the best electroless copper plating solution composition and operation conditions were obtained as follows:plating temperature 323 K,stirring speed 30 r/min,PH =13,loadage 8g/L,CuSO4·5H2O 0.032 mol/L,HCHO 0.274 mol/L,TEA 0.1208 mol/L,2,2 ’league pyridine 12 mg/L.

关键词： Tungsten-copper composite powder Electroless copper plating orthogonal experimental Deposition rate.

来源： cnki会议评论

在线全文

cnki会议

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

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

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：