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Prediction on grinding force during grinding powder metallurgy nickel-based superalloy FGH96 with electroplated CBN abrasive wheel

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Chinese Journal of Aeronautics 2021年第8期34卷 65-74页

作者： Benkai LI chenwei dai Wenfeng DING Changyong YANG Changhe LI Olga KULIK Vyacheslav SHUMYACHER National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Mechanical Engineering Suzhou University of Science and TechnologySuzhou 215009China School of Mechanical Engineering Qingdao University of TechnologyQingdao 266520China Volzhsky Polytechnic Institute(Branch)Volgograd State Technical University 42a Engelsa StreetVolzhskyVolgograd Region 404121Russia

In this article,a grinding force model,which is on the basis of cutting process of single abrasive grains combined with the method of theoretical derivation and empirical formula by analyzing the formation mechanism of grinding force,was *** key factors have been taken into accounts in this model,such as the contact friction force between abrasive grains and materials,the plastic deformation of material in the process of abrasive plowing,and the shear strain effect of material during the process of cutting chips *** model was finally validated by the orthogonal grinding experiment of powder metallurgy nickel-based superalloy FGH96 by using the electroplated CBN abrasive *** force values of prediction and experiment were in good *** errors of tangential grinding force and normal grinding force were 9.8%and 13.6%,*** contributions of sliding force,plowing force and chip formation force were also *** addition,the tangential forces of sliding,plowing and chip formation are 14%,19%and 11%of the normal forces on average,*** pro-posed grinding forcemodel is not only in favor of optimizing the grinding parameters and improving grinding efficiency,but also contributes to study some other grinding subjects(*** wheel wear,grinding heat,residual stress).

关键词： Electro-plated CBN abrasive wheel Grinding force model Grinding mechanism Orthogonal experiment Powder metallurgy nickel-based superalloy FGH96

Reducing the carbon emissions from Qianxi tomato fruits preservation by cold atmospheric plasma

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International Journal of Agricultural and Biological Engineering 2023年第5期16卷 213-220页

作者： Tao Jin Yan Chen chenwei dai Jimin Deng Qinghua Xu Zhengwei Wu School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China Joint Laboratory of Plasma Application Technology Institute of Advanced TechnologyUniversity of Science and Technology of ChinaHefei 230031China Anhui Academy of Medical Sciences Hefei 230061China Anhui Institute for Food and Drug Control Hefei 230051China CAS Key Laboratory of Geospace Environment University of Science and Technology of ChinaHefei 230026China

China has pledged to reach its dual-carbon goals(i.e.,carbon peak and carbon neutrality)at the end of *** reduce carbon emission in food preservation industry,the preservation effects of cold atmospheric plasma intermittent treatment(1 min/6 h each day,PL4)combined with 15℃ and 4℃ only on Qianxi tomato fruits during 7 d storage were *** indicated that the firmness,L*,sensory taste,glutathione(GSH)content,mineral(Fe,P,K)content,polyphenol oxidase activity of PL4 tomatoes were significantly increased than that in Control during earlier period storage,with worse weight loss,titratable acid,a*,b*,lycopene content,·OH radical scavenging capacity and same moisture content,total soluble solids,polysaccharide content,total phenolics content,total flavonoid content,ascorbic acid content,1,1-diphenyl-2-picrylhydrazyl radical scavenging capacity,pectin methylesterase ***,the power and R134a consumption of PL4 were highly decreased by around 56.4 kW·h and 0.3 g respectively during whole storage as compared to Control,and reduced more than 99.8%carbon emission based on equipment using *** in all,this study illustrated that PL4 treatment can be applied as an ecofriendly,low carbon and sustainable preservation strategy for short-term storage of fruits under 4℃ or higher temperature.

关键词： cold atmospheric plasma carbon reduction Qianxi tomato fruits food preservation

Creep feed grinding induced gradient microstructures in the superficial layer of turbine blade root of single crystal nickel-based superalloy

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International Journal of Extreme Manufacturing 2021年第4期3卷 89-102页

作者： Qing Miao Wenfeng Ding Jiuhua Xu Lijie Cao Hongcai Wang Zhen Yin chenwei dai Weijie Kuang National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China College of Mechanical Engineering Suzhou University of Science and TechnologySuzhou 215009People’s Republic of China Institute for Materials Ruhr-Universität BochumBochum 44801Germany

The service performance of the turbine blade root of an aero-engine depends on the microstructures in its superficial *** work investigated the surface deformation structures of turbine blade root of single crystal nickel-based superalloy produced under different creep feed grinding *** microstructures in the superficial layer were clarified and composed of a severely deformed layer(DFL)with nano-sized grains(48–67 nm)at the topmost surface,a DFL with submicron-sized grains(66–158 nm)and micron-sized laminated structures at the subsurface,and a dislocation accumulated layer extending to the bulk *** formation of such gradient microstructures was found to be related to the graded variations in the plastic strain and strain rate induced in the creep feed grinding process,which were as high as 6.67 and 8.17×10^(7)s^(−1),*** the current study,the evolution of surface gradient microstructures was essentially a transition process from a coarse single crystal to nano-sized grains and,simultaneously,from one orientation of a single crystal to random orientations of polycrystals,during which the dislocation slips dominated the creep feed grinding induced microstructure deformation of single crystal nickel-based superalloy.

关键词： gradient microstructure creep feed grinding single crystal nickel-based superalloy dislocation

Origin软件在凝胶色谱数据处理中的应用

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实验室研究与探索 2017年第12期36卷 43-46页

作者：戴晨伟郝建文安徽职业技术学院环境与化工学院合肥230011

介绍了基于条法切片模型、线性拟合、间隔取点、微分、积分等方法,利用Origin 8.0软件处理凝胶色谱淋出曲线数据获得聚合物数均和重均相对分子质量及其微分和累积重量分数相对分子质量分布曲线的原理及过程。该方法不需要借助凝胶色谱... 详细信息

介绍了基于条法切片模型、线性拟合、间隔取点、微分、积分等方法,利用Origin 8.0软件处理凝胶色谱淋出曲线数据获得聚合物数均和重均相对分子质量及其微分和累积重量分数相对分子质量分布曲线的原理及过程。该方法不需要借助凝胶色谱工作站,易于掌握、成本低廉。处理结果对比表明,利用Origin 8.0软件,采用介绍的方法处理凝胶色谱淋出曲线数据能获得与专业凝胶色谱工作站近似的处理结果。此法适合没有配置专业凝胶色谱工作站的凝胶色谱系统数据处理使用。

关键词：凝胶色谱聚合物相对分子质量数据处理

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高职化工技术类示范实验实训中心建设探讨

实验室研究与探索 2018年第1期37卷 154-156,176页

作者：郝建文戴晨伟安徽职业技术学院环境与化工学院合肥230011

介绍了安徽职业技术学院化工技术类省级示范实验实训中心的现状、特色,重点阐述省级示范实验实训中心立足培养化工行业高等技能人才的指导思想和"三结合,五合一"的教学理念。在此基础上,进一步探讨了示范实验实训中心的基于工作过程的... 详细信息

介绍了安徽职业技术学院化工技术类省级示范实验实训中心的现状、特色,重点阐述省级示范实验实训中心立足培养化工行业高等技能人才的指导思想和"三结合,五合一"的教学理念。在此基础上,进一步探讨了示范实验实训中心的基于工作过程的实验教学体系构建、职业资格内嵌的教学内容、基于现代教学技术的教学手段、四位一体的教学考核以及"内培外引"师资队伍建设举措。最后总结了示范中心在学生竞赛、教学研究成果、特色教材编写等方面的建设成效。

关键词：高职实验实训化工技术类

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超声振动辅助磨料流抛光技术研究综述

机械工程学报 2021年第9期57卷 233-253页

作者：李华任坤殷振戴晨伟王中旺魏力韦冬苏州科技大学机械工程学院苏州215009 苏州科技大学苏州市精密与高效加工技术重点实验室苏州215009

抛光加工是实现高性能零件最终表面质量要求的重要的方法。超声振动辅助磨料流抛光是磨料流抛光与超声振动相结合的复合抛光技术,在光学玻璃、蓝宝石、单晶硅、陶瓷等硬脆性材料抛光和金属材料零件复杂表面的抛光加工中具有独特的优势,... 详细信息

抛光加工是实现高性能零件最终表面质量要求的重要的方法。超声振动辅助磨料流抛光是磨料流抛光与超声振动相结合的复合抛光技术,在光学玻璃、蓝宝石、单晶硅、陶瓷等硬脆性材料抛光和金属材料零件复杂表面的抛光加工中具有独特的优势,可以有效地提高表面质量和抛光效率。对近年来的技术发展进行了总结,对抛光加工基本原理研究、材料去除微观机理研究、抛光工艺方法分类及应用等方面进行了系统的论述和分析。指出了这一技术当前的研究热点和需要解决的关键问题,对今后的研究、应用和发展给出了建议和展望。

关键词：超声振动磨料流抛光去除机理

高效光饰加工技术在航空发动机典型零件加工中的应用

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金刚石与磨料磨具工程 2018年第3期38卷 75-80页

作者：汪斌何坚余杰裴润森戴晨伟中国航发西安航空发动机有限公司西安710021 中国科学院合肥物质科学研究院先进制造技术研究所江苏常州213164

光饰加工作为改善工件表面质量的最终工艺,因其抛光效率高、加工质量好等优点,逐渐在航空发动机零部件的加工中得到广泛应用。本文在概述光饰加工基本原理的基础上,全面分析了高效光饰加工技术所需的光饰机、磨块和光饰剂等方面的研究成... 详细信息

光饰加工作为改善工件表面质量的最终工艺,因其抛光效率高、加工质量好等优点,逐渐在航空发动机零部件的加工中得到广泛应用。本文在概述光饰加工基本原理的基础上,全面分析了高效光饰加工技术所需的光饰机、磨块和光饰剂等方面的研究成果,并简要阐述了高效光饰加工技术在航空发动机叶片、盘、轴、机匣等典型零件加工中的应用情况。

关键词：高效光饰加工表面质量航空发动机典型零件

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超声振动辅助磨削弧区的单颗磨粒切厚特征

金刚石与磨料磨具工程 2022年第1期42卷 88-96页

作者：张坤殷振戴晨伟苗情程祺辉苏州科技大学机械工程学院江苏苏州215009

为准确描述超声振动下的单颗磨粒切厚特征,实测多层金属结合剂金刚石砂轮表面的相邻2颗磨粒的周向间距以及磨粒出刃高度;依据超声振动辅助磨削的磨粒运动轨迹方程及相邻磨粒运动轨迹干涉理论,采用等分线法,利用MATLAB软件求解磨粒在完... 详细信息

为准确描述超声振动下的单颗磨粒切厚特征,实测多层金属结合剂金刚石砂轮表面的相邻2颗磨粒的周向间距以及磨粒出刃高度;依据超声振动辅助磨削的磨粒运动轨迹方程及相邻磨粒运动轨迹干涉理论,采用等分线法,利用MATLAB软件求解磨粒在完整接触弧区的单颗磨粒切厚值,并分析各主要参数对单颗磨粒切厚特征的影响。结果表明:相邻磨粒间距、相邻磨粒高度差对单颗磨粒切厚的影响均呈线性变化;单颗磨粒切厚随超声振幅的增大而线性增大,且随超声振动频率的增大而阶段性变化;超声振动辅助磨削的单颗磨粒切厚特征受砂轮转速、磨削深度的影响较大,受工件进给速度的影响相对较小。

关键词：超声振动磨削单颗磨粒切厚数值计算

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皖贝母产生物碱内生真菌的筛选与鉴定

世界科学技术-中医药现代化 2018年第11期20卷 2021-2026页

作者：许勇戴陈伟董朝阳蔡标安徽省医学科学研究院微生物研究所合肥230061

目的:从皖贝母中分离产生物碱的内生真菌。方法:采用组织块法、薄层层析、高效液相色谱-旋转蒸发光检测器法以及形态学和分子生物学方法从皖贝母鳞茎中筛选出产生物碱的内生真菌。结果:从皖贝母中分离出1株产生物碱的内生真菌,并鉴定为... 详细信息

目的:从皖贝母中分离产生物碱的内生真菌。方法:采用组织块法、薄层层析、高效液相色谱-旋转蒸发光检测器法以及形态学和分子生物学方法从皖贝母鳞茎中筛选出产生物碱的内生真菌。结果:从皖贝母中分离出1株产生物碱的内生真菌,并鉴定为极细链格孢菌(Alternaria tenuissima)。结论:从皖贝母中分离到了一株产生物碱内生真菌bm-2,为解决皖贝母药用资源匮乏的问题提供理论依据。

关键词：皖贝母内生真菌生物碱