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Electrostatic atomization minimum quantity lubrication machining:from mechanism to application

International Journal of Extreme Manufacturing 2022年第4期4卷 58-100页

作者： Wenhao Xu Changhe Li Yanbin Zhang Hafiz Muhammad Ali Shubham Sharma Runze Li Min Yang Teng Gao mingzheng liu Xiaoming Wang Zafar Said Xin liu Zongming Zhou School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520People's Republic of China State Key Laboratory of Ultra-Precision Machining Technology Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHong KongPeople's Republic of China Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department of Mechanical Engineering IK Gujral Punjab Technical UniversityPunjab 144603India Department of Biomedical Engineering University of Southern CaliforniaLos AngelesCA 90089-1111United States of America College of Engineering University of SharjahSharjah 27272United Arab Emirates School of Mechanical Engineering Dalian University of TechnologyDalian 116024People's Republic of China Hanergy(Qingdao)Lubrication Technology Co.LTD Qingdao 266520People's Republic of China

Metal cutting fluids(MCFs)under flood conditions do not meet the urgent needs of reducing carbon ***-based minimum quantity lubrication(MQL)is an effective alternative to flood ***,pneumatic atomization MQL has poor atomization properties,which is detrimental to occupational ***,electrostatic atomization MQL requires preliminary exploratory ***,systematic reviews are lacking in terms of capturing the current research status and development direction of this *** study aims to provide a comprehensive review and critical assessment of the existing understanding of electrostatic atomization *** research can be used by scientists to gain insights into the action mechanism,theoretical basis,machining performance,and development direction of this ***,the critical equipment,eco-friendly atomization media(biolubricants),and empowering mechanisms of electrostatic atomization MQL are ***,the advanced lubrication and heat transfer mechanisms of biolubricants are revealed by quantitatively comparing MQL with MCF-based wet ***,the distinctive wetting and infiltration mechanisms of electrostatic atomization MQL,combined with its unique empowering mechanism and atomization method,are compared with those of pneumatic atomization *** experiments have shown that electrostatic atomization MQL can reduce tool wear by 42.4%in metal cutting and improve the machined surface Ra by 47%compared with pneumatic atomization ***,future development directions,including the improvement of the coordination parameters and equipment integration aspects,are proposed.

关键词： cutting grinding minimum quantity lubrication electrostatic atomization biolubricant

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基于联轴器不对中的磁悬浮双转子系统不平衡响应分析

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农业装备与车辆工程 2024年第9期62卷 96-101页

作者：梁曾凯刘明政王念先邓江洪卢本才武汉科技大学机械自动化学院湖北武汉430081 冶金装备及其控制教育部重点实验室湖北武汉430081 合建卡特工业股份有限公司湖北武汉430081

为探讨联轴器不对中故障对磁悬浮双转子系统振动响应的影响,基于有限元法构建包含不对中故障的磁悬浮双转子系统动力学模型,利用Newmark-β法求解其运动方程,通过时域和频域分析不对中情况下转子系统的振动响应。研究结果表明:在不对中... 详细信息

为探讨联轴器不对中故障对磁悬浮双转子系统振动响应的影响,基于有限元法构建包含不对中故障的磁悬浮双转子系统动力学模型,利用Newmark-β法求解其运动方程,通过时域和频域分析不对中情况下转子系统的振动响应。研究结果表明:在不对中引起的附加力作用下,磁悬浮双转子系统的响应会呈现显著的二倍频分量,且随着不对中程度的增加,二倍频分量的幅值也相应增大;内转子由于不对中故障引起的二倍频分量会通过中介轴承传递到外转子上;在不同控制参数下不对中故障对系统的影响有所不同,通过选取合适的比例系数和较大的微分系数,可以有效降低不对中故障对系统振动响应的影响。

关键词：双转子系统磁悬浮轴承联轴器不对中不平衡响应

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Temperature field model in surface grinding: a comparative assessment

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International Journal of Extreme Manufacturing 2023年第4期5卷 314-373页

作者： Min Yang Ming Kong Changhe Li Yunze Long Yanbin Zhang Shubham Sharma Runze Li Teng Gao mingzheng liu Xin Cui Xiaoming Wang Xiao Ma Yuying Yang School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdaoPeople’s Republic of China College of Physics Qingdao UniversityQingdaoPeople’s Republic of China Department of Mechanical Engineering University Centre for Research and DevelopmentChandigarh UniversityMohaliIndia Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMAUnited States of America School of Mechanical Engineering Qilu University of Technology(Shandong Academy of Sciences)JinanPeople’s Republic of China

Grinding is a crucial process in machining workpieces because it plays a vital role in achieving the desired precision and surface ***,a significant technical challenge in grinding is the potential increase in temperature due to high specific energy,which can lead to surface thermal ***,ensuring control over the surface integrity of workpieces during grinding becomes a critical *** necessitates the development of temperature field models that consider various parameters,such as workpiece materials,grinding wheels,grinding parameters,cooling methods,and media,to guide industrial *** study thoroughly analyzes and summarizes grinding temperature field ***,the theory of the grinding temperature field is investigated,classifying it into traditional models based on a continuous belt heat source and those based on a discrete heat source,depending on whether the heat source is uniform and *** this examination,a more accurate grinding temperature model that closely aligns with practical grinding conditions is ***,various grinding thermal models are summarized,including models for the heat source distribution,energy distribution proportional coefficient,and convective heat transfer *** comprehensive research,the most widely recognized,utilized,and accurate model for each category is *** application of these grinding thermal models is reviewed,shedding light on the governing laws that dictate the influence of the heat source distribution,heat distribution,and convective heat transfer in the grinding arc zone on the grinding temperature ***,considering the current issues in the field of grinding temperature,potential future research directions are *** aim of this study is to provide theoretical guidance and technical support for predicting workpiece temperature and improving surface integrity.

关键词： grinding temperature uniform continuous temperature field nonuniform discontinuous temperature field heat source distribution model grinding heat distribution coefficient model convective heat transfer coefficient model

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Cryogenic minimum quantity lubrication machining: from mechanism to application

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Frontiers of Mechanical Engineering 2021年第4期16卷 649-697页

作者： mingzheng liu Changhe LI Yanbin ZHANG Qinglong AN Min YANG Teng GAO Cong MAO Bo liu Huajun CAO Xuefeng XU Zafar SAID Sujan DEBNATH Muhammad JAMIL Hafz Muhammad ALI Shubham SHARMA School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China College of Automotive and Mechanical Engineering Changsha University of Science and TechnologyChangsha 410114China Sichuan Future Aerospace Industry LLC Shifang 618400China State Key Laboratory Mechanical Transmissions Chongqing UniversityChongqing 400044China Key Laboratory of Special Purpose Equipment and Advanced Processing Technology(Ministry of Education and Zhejiang Province) Zhejiang University of TechnologyHangzhou 310032China Department of Sustainable and Renewable Energy Engineering University of ShaijahShaijah 27272the United Arab Emirates Mechanical Engineering Department Curtin UniversityMiri 98009Malaysia College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department of Mechanical Engineering I.K.Gujral Punjab Technical UniversityJalandhar 144603India

Cutting fluid plays a cooling-lubrication role in the cutting of metal ***,the substantial usage of cutting fluid in traditional flood machining seriously pollutes the environment and threatens the health of *** machining technologies,such as dry cutting,minimum quantity lubrication(MQL),and cryogenic cooling technology,have been used as substitute for flood ***,the insufficient cooling capacity of MQL with normal-temperature compressed gas and the lack of lubricating performance of cryogenic cooling technology limit their industrial *** technical bottleneck of mechanical-thermal damage of difficult-to-cut materials in aerospace and other fields can be solved by combining cryogenic medium and *** latest progress of cryogenic minimum quantity lubrication(CMQL)technology is reviewed in this paper,and the key scientific issues in the research achievements of CMQL are ***,the application forms and process characteristics of CMQL devices in turning,milling,and grinding are systematically summarized from traditional settings to innovative ***,the cooling-lubrication mechanism of CMQL and its influence mechanism on material hardness,cutting force,tool wear,and workpiece surface quality in cutting are extensively *** effects of CMQL are systematically analyzed based on its mechanism and application *** show that the application effect of CMQL is better than that of cryogenic technology or MQL ***,the prospect,which provides basis and support for engineering application and development of CMQL technology,is introduced considering the limitations of CMQL.

关键词： cryogenic minimum quantity lubrication(CMQL) cryogenic medium processing mode device application mechanism application effect

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Engineering high amylose and resistant starch in maize by CRISPR/Cas9-mediated editing of starch branching enzymes

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The Crop Journal 2024年第4期12卷 1252-1258页

作者： mingzheng Ma Shanqiu Sun Jinjie Zhu Xiantao Qi Gaoke Li Jianguang Hu Chuanxiao Xie Changlin liu State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China Hainan Yazhou Bay Seed Lab Sanya 572024HainanChina Anhui Agricultural University Hefei 230036AnhuiChina Crops Research Institute Guangdong Academy of Agricultural SciencesGuangzhou 510640GuangdongChina

To improve the amylose content(AC)and resistant starch content(RSC)of maize kernel starch,we employed the CRISPR/Cas9 system to create mutants of starch branching enzyme I(SBEI)and starch branching enzyme IIb(SBEIIb).A frameshift mutation in SBEI(E1,a nucleotide insertion in exon 6)led to plants with higher RSC(1.07%),lower hundred-kernel weight(HKW,24.71±0.14 g),and lower plant height(PH,218.50±9.42 cm)compared to the wild type(WT).Like the WT,E1 kernel starch had irregular,polygonal shapes with sharp edges.A frameshift mutation in SBEIIb(E2,a four-nucleotide deletion in exon 8)led to higher AC(53.48%)and higher RSC(26.93%)than that for the WT.E2 kernel starch was significantly different from the WT regarding granule morphology,chain length distribution pattern,X-ray diffraction pattern,and thermal characteristics;the starch granules were more irregular in shape and comprised typical B-type *** SBEI and SBEIIb(E12)had a synergistic effect on RSC,HKW,PH,starch properties,and starch biosynthesis-associated gene ***,SS1,SSIIa,SSIIIa,and SSIIIb were upregulated in E12 endosperm compared to WT *** study lays the foundation for rapidly improving the starch properties of elite maize lines.

关键词： Maize Gene editing Starch branching enzyme I Starch branching enzyme IIb

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Nanoparticle-enhanced coolants in machining:mechanism,application,and prospects

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Frontiers of Mechanical Engineering 2023年第4期18卷 1-47页

作者： Shuguo HU Changhe LI Zongming ZHOU Bo liu Yanbin ZHANG Min YANG Benkai LI Teng GAO mingzheng liu Xin CUI Xiaoming WANG Wenhao XU Y.S.DAMBATTA Runze LI Shubham SHARMA School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China Hanneng(Qingdao)Lubrication Technology Co. Ltd.Qingdao 266100China Sichuan New Aviation TA Technology Co. Ltd.Shifang 618400China Mechanical Engineering Department Ahmadu Bello UniversityZaria 810106Nigeria Massachusetts Institute of Technology CambridgeMA 02139USA Department of Mechanical Engineering IK Gujral Punjab Technical UniversityPunjab 144603India

Nanoparticle-enhanced coolants(NPECs)are increasingly used in minimum quantity lubrication(MQL)machining as a green lubricant to replace conventional cutting fluids to meet the urgent need for carbon emissions and achieve sustainable ***,the thermophysical properties of NPEC during processing remain unclear,making it difficult to provide precise guidance and selection principles for industrial ***,this paper reviews the action mechanism,processing properties,and future development directions of ***,the laws of influence of nano-enhanced phases and base fluids on the processing performance are revealed,and the dispersion stabilization mechanism of NPEC in the preparation process is ***,the unique molecular structure and physical properties of NPECs are combined to elucidate their unique mechanisms of heat transfer,penetration,and antifriction ***,the effect of NPECs is investigated on the basis of their excellent lubricating and cooling properties by comprehensively and quantitatively evaluating the material removal characteristics during machining in turning,milling,and grinding *** showed that turning of Ti‒6Al‒4V with multi-walled carbon nanotube NPECs with a volume fraction of 0.2%resulted in a 34%reduction in tool wear,an average decrease in cutting force of 28%,and a 7%decrease in surface roughness Ra,compared with the conventional flood ***,research gaps and future directions for further applications of NPECs in the industry are presented.

关键词： nanoparticle-enhanced coolant minimum quantity lubrication biolubricant thermophysical properties turning milling grinding

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面向滑动窗口应用的设计空间探索方法

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计算机辅助设计与图形学学报 2008年第5期20卷 631-636页

作者：董亚卓窦勇刘明政国防科学技术大学计算机学院长沙410073 总后后勤研究所综合应用室北京100071

面向滑动窗口应用，提出一种设计空间探索算法，通过判断芯片面积、存储带宽和存储资源3种片上资源约束的上限，实现充分利用片上资源．实验结果表明，该算法可以将存储资源利用率提高85％以上；同时，与相关工作相比，文中的阵列分块... 详细信息

面向滑动窗口应用，提出一种设计空间探索算法，通过判断芯片面积、存储带宽和存储资源3种片上资源约束的上限，实现充分利用片上资源．实验结果表明，该算法可以将存储资源利用率提高85％以上；同时，与相关工作相比，文中的阵列分块方法可以将访存次数降低2％～20％．

关键词：滑动窗口应用高级综合存储结构设计空间探索

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湿热环境对改进型钡钨发射体空心阴极放电特性的影响

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中国空间科学技术 2018年第5期38卷 1-6页

作者：冯杰刘明正谷增杰兰州空间技术物理研究所真空技术与物理国防科技重点实验室兰州730000

电推力器用传统钡钨空心阴极具有工作温度低、发射效率高的优点,但其抗中毒能力却较差。电推力器的寿命受到空心阴极寿命的制约,为保证推力器长期在轨工作,研制了一种具备强抗中毒能力的改进型钡钨阴极,将其暴露在90%湿度、60℃的湿热... 详细信息

电推力器用传统钡钨空心阴极具有工作温度低、发射效率高的优点,但其抗中毒能力却较差。电推力器的寿命受到空心阴极寿命的制约,为保证推力器长期在轨工作,研制了一种具备强抗中毒能力的改进型钡钨阴极,将其暴露在90%湿度、60℃的湿热环境中累计240h,试验前后触持电压的变化量小于1V,满足判据要求。随后对改进型钡钨阴极分别进行了组件级和推力器级性能测试,测试结果表明,改进型钡钨阴极的稳态工作温度为1 050℃,比六硼化镧型阴极低250℃,组件级阳极电压为21V,比六硼化镧型低4～5V;推力器级阳极电压为35V,比六硼化镧型低8～10V。试验结论表明,改进型钡钨阴极具有强抗中毒能力及优异的工作性能,采用该类阴极可以有效地满足推力器的长寿命要求。

关键词：空心阴极钡钨发射体六硼化镧抗中毒湿热试验

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浅谈我国馆藏建设中存在的问题与出路

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图书馆学研究 1999年第6期 13-14页

作者：刘明正

长期以来，我国图书馆的文献采购工作只考虑具体图书馆的文献采购与文献资源微观布局，而文献资源宏观布局一直被忽视，导致我国的藏书建设工作出现了文献收藏高度重复，进口书刊复盖率低，完整系统的藏书原则得不到保障，文献资... 详细信息

长期以来，我国图书馆的文献采购工作只考虑具体图书馆的文献采购与文献资源微观布局，而文献资源宏观布局一直被忽视，导致我国的藏书建设工作出现了文献收藏高度重复，进口书刊复盖率低，完整系统的藏书原则得不到保障，文献资源布局不合理等弊端。为了改变这种状况，我们应当借鉴国外经验，开展馆际协作，采购协作，合作收藏，为资源共享创造条件。

关键词：图书馆馆藏建设中国藏书建设

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山区池塘河蟹养殖技术总结

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科学养鱼 2010年第2期32卷 23-24页

作者：刘名镇福建建瓯市水产技术推广站 353100

2009年4月份，上海客商陈继业先生与建瓯市水源乡大户村洽谈达成协议，以每年70万元租金承包了该村闲置的44．13公顷的山区养鳗场，并注册500万元资金，成立福建省誉中生态养殖有限公司，在该市首次开展池塘河蟹仿生态养殖。5月16日，... 详细信息

2009年4月份，上海客商陈继业先生与建瓯市水源乡大户村洽谈达成协议，以每年70万元租金承包了该村闲置的44．13公顷的山区养鳗场，并注册500万元资金，成立福建省誉中生态养殖有限公司，在该市首次开展池塘河蟹仿生态养殖。5月16日，该公司从江苏购买大规格长江扣蟹苗种20万只，无公害池塘生态养殖大闸蟹20公顷。至11月份，池塘试养大闸蟹比较成功，平均个体达150克，平均亩产60千克，收获优质长江大闸蟹18000千克，产值达194万元，取得良好的经济、社会和生态效益。根据实践经验和山区特点，现将山区池塘河蟹养殖技术要点简述如下：

关键词：山区池塘养殖技术河蟹仿生态养殖池塘生态养殖大闸蟹生态效益实践经验

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