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Chinese Journal of Aeronautics 2022年第2期35卷 361-375页

作者： Chongyan CAI jiaqiang dang Qinglong AN Weiwei MING Ming CHEN School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

This paper aims to characterise surface morphology and 3D roughness parameters of unidirectional carbon fibre reinforced plastic(UD-CFRP)milled at 0°,45°,90°,and 135°fibre orientation angles(FOAs).Side milling experiments are conducted on UD-CFRP *** damage forms and texture direction of milled surface are *** frequency of defects on CFRP surface is quantitatively determined using radially averaged 2D *** kinematicdynamic surface topography is reconstructed considering feed,runout and vibration,then the ideal roughness parameters,S_(a),S_(q),S_(sk),and S_(ku)are calculated and compared with the measured ones,finally the material factor-induced roughness components are *** show that CFRP surface has no regular feed *** frequency of fibre breakage or surface defects is greater than tooth passing *** sorted by their average S_(a)in descending order is135°>90°>45°>0°,where surface defects contribute 93.9%,77.1%,73.2%,72.2%of the total roughness respectively,which suggests that surface defects show a more important role than tool kinematics and vibration in formation of milled *** negative Skewness(Ssk<0)and high Kurtosis(S_(ku)=4.0–11.5)of milled surface signify porosity and the presence of many anomalous deep valleys in milled surface,respectively.

关键词： Carbon fibre reinforced plastic(CFRP) Surface characterization Surface morphology Surface roughness Surface texture

Feasibility study of creep feed grinding of 300M steel with zirconium corundum wheel

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Chinese Journal of Aeronautics 2022年第3期35卷 565-578页

作者： jiaqiang dang Heng ZANG Qinglong AN Weiwei MING Ming CHEN School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Mechanical Systems and Vibration Shanghai Jiao Tong UniversityShanghai 200240China

The ultrahigh strength 300M steel has been commonly used in the manufacture of aircraft landing gear and rotor shaft parts due to its excellent mechanical *** feed grinding is one of the essential operations during the whole component manufacturing *** this work,the feasibility of creep feed grinding of 300M steel by using the hard zirconium corundum wheel was theoretically and experimentally evaluated.A variety of responses including grinding forces,temperature fields,specific grinding energy,surface integrity and chip modes were carefully ***,the mechanism of ground surface profile generation and the spatial frequency spectrum of the surface profile were tentatively *** was found that the wheel speed has a relative influence on the grinding forces and temperatures of which the work hardening effect dominates the material removal with lower wheel speed while the thermal softening becomes crucial as the wheel speed exceeds the critical value for the studied 300M ***,a scattered spatial frequency spectrum for the generated surface profile was noticed with lower wheel speed while the spectrum gathers towards the lower frequency values with higher amplitude as the wheel speed *** shearing chip and flowing chip dominates the main chip type,indicating the excellent abrasive sharpness during the grinding *** general,the used zirconium corundum wheel presents feasibility for the creep feed grinding of 300M steel because of the high material removal rate,absence of surface burn,low wheel wear and higher compressive residual stresses.

关键词： 300M steel Chip formation Creep feed grinding Surface morphology Zirconium corundum wheel

A new method for deburring of servo valve core edge based on ultraprecision cutting with the designed monocrystalline diamond tool

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Science China(Technological Sciences) 2019年第10期62卷 1805-1815页

作者： AN QingLong dang jiaqiang LIU GongYu Dong DaPeng MING WeiWei CHEN Ming State Key Laboratory of Mechanical System and Vibration School of Mechanical Engineering Shanghai Jiao Tong University

Deburring of high-precision components to their micrometer features without any damage is very important but of great difficulty as the burr-to-functionality size ratio increases. To this end, this paper proposes a new deburring method in which the micro burr should be directly removed based on ultraprecision cutting with the designed monocrystalline diamond tool. To determine the feasibility of the proposed method, this paper applies it for deburring of the precision working edge of the servo valve core. Firstly, the monocrystalline diamond tool is carefully designed by covering a variety of topics like rake angle,clearance angle, edge radius. Then, the finite element(FE) simulation was conducted to characterize the deburring performance during the removal of the micro burr produced by the single abrasive grinding. Finally, an innovative self-designed deburring system was introduced and the deburring process was evaluated in terms of cutting forces, temperatures, tool wear mechanisms and deburring quality of the working edges by experiments. The FE simulation results indicate the suitability of the proposed deburring method. Meanwhile, the experimental findings agree well with simulation results and show that ultraprecision cutting with the specialized monocrystalline diamond tool could be successfully used for deburring of servo valve core edge without any damage. This work can provide technical guidance for similar engineering applications, and thus brings an increase to the machining efficiency for the manufacture of precision components.

关键词： monocrystalline diamond tool FE simulation deburring method servo valve core edge ultraprecision cutting

基于DEFORM3D的伺服阀芯端面磨削毛刺形成仿真

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金刚石与磨料磨具工程 2019年第5期39卷 50-56页

作者：马天嵘党嘉强安庆龙上海交通大学机械与动力工程学院

为研究磨粒不同排布方式对磨削毛刺形成的影响,对伺服阀阀芯材料端面磨削过程进行简化,利用DEFORM3D对单颗磨粒在叶序、错位和随机3种排布形式下的磨削过程建模并进行磨削有限元仿真,分析3种不同磨粒排布方式下的侧边毛刺形成过程,比较... 详细信息

为研究磨粒不同排布方式对磨削毛刺形成的影响,对伺服阀阀芯材料端面磨削过程进行简化,利用DEFORM3D对单颗磨粒在叶序、错位和随机3种排布形式下的磨削过程建模并进行磨削有限元仿真,分析3种不同磨粒排布方式下的侧边毛刺形成过程,比较其磨削毛刺高度。结果表明:在叶序排布下,2颗磨粒中间接触边处存在高度较为稳定的毛刺;在错位排布下,2颗磨粒的磨削轨迹基本重合,耕犁的工件表面两侧形成毛刺;在随机排布下,2颗磨粒的磨削轨迹存在重叠,2颗磨粒接触边处材料挤压隆起特征更显著,容易形成二次毛刺。使用叶序排布的砂轮更有利于加工中控制毛刺的高度。

关键词：伺服阀芯磨粒排布磨削毛刺有限元仿真

300M钢超声滚压表面形貌演变机理和试验表征

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机械工程学报 2024年第15期60卷 358-367页

作者：党嘉强安庆龙李宇罡明伟伟王浩伟陈明上海交通大学机械系统与振动国家重点实验室上海200240 上海交通大学金属基复合材料国家重点实验室上海200240

基于超声滚压过程中的接触力学理论,提出了单位面积冲击接触率评价指标,求解了不同工艺参数下接触中心位移和接触区域面积。研究了超声滚压过程中表面形貌光整加工机理,提出了表面层材料主动塑性变形区、被动塑性变形区和被动弹性变形... 详细信息

基于超声滚压过程中的接触力学理论,提出了单位面积冲击接触率评价指标,求解了不同工艺参数下接触中心位移和接触区域面积。研究了超声滚压过程中表面形貌光整加工机理,提出了表面层材料主动塑性变形区、被动塑性变形区和被动弹性变形区的特征结构。通过正交试验探讨超声滚压参数对表面粗糙度的作用规律,为通过优化超声滚压参数从而实现表面形貌主动控制提供理论依据。结果表明,在选取的超声滚压工艺参数下,滚压球与工件接触中心的位移值总是大于超声振幅值,这表明超声滚压过程中滚压头始终与工件表面保持接触。超声滚压具有“削峰填谷”效应,表面主动塑性变形区材料流动是引起表面光洁度提升的根本原因。滚压球进给速度对表面粗糙度的影响最大,静载荷次之,转速最小。在超声滚压过程中如果想要实现较好的表面光洁度同时提高加工效率,可选取较高的转速、较大的静载荷和较小的滚压球进给。

关键词： 300M钢超声滚压表面形貌粗糙度塑性流动

基于支持向量机回归的曲面零件涡流测距标定方法

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上海交通大学学报 2020年第7期54卷 674-681页

作者：陶正瑞党嘉强徐锦泱安庆龙陈明王力任斐上海交通大学机械与动力工程学院机械系统与振动国家重点实验室上海200240 上海航天设备制造总厂有限公司上海200245

以燃料贮箱筒段外表面聚氨酯泡沫层厚度测量精度要求为例,开展4种常见曲率筒段试件标定试验;提出基于支持向量机回归的涡流测距标定方法,建立提离距离预测模型(LDPM),用于曲面零件涡流测距;研究曲率对涡流测距测量误差的影响规律.根据... 详细信息

以燃料贮箱筒段外表面聚氨酯泡沫层厚度测量精度要求为例,开展4种常见曲率筒段试件标定试验;提出基于支持向量机回归的涡流测距标定方法,建立提离距离预测模型(LDPM),用于曲面零件涡流测距;研究曲率对涡流测距测量误差的影响规律.根据测量误差产生的原因将测量误差分为两部分:表面曲率误差和其他误差,分析误差分量在传感器量程范围内相对大小的变化规律,为曲面测量误差补偿提供参考依据.此外,对比分析LDPM与常用标定方法获得的标定函数在测量精度、计算速率方面的优劣,为曲面零件涡流测距选用何种标定方法提供建议.研究结果表明:LDPM在传感器量程初始阶段,表面曲率误差对曲率不敏感;在量程中点附近,表面曲率误差绝对值随着曲率的增加,先减小后上升;在终点区域,表面曲率误差绝对值随着曲率的增加而上升.在整个量程范围内的不同测量区间,其他误差保持不变.此外,LDPM可以将测量误差控制在[-0.5, 0.5] mm,精度与5项多峰高斯拟合相当,高于4次多项式拟合,能够满足厚度测量精度要求,无损检测操作方便.

关键词：涡流测距支持向量机回归误差补偿多峰高斯拟合

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应力超声滚压表面强化机理和抗疲劳性能研究

机械工程学报 2024年第9期60卷 127-136页

作者：吴杰党嘉强李宇罡陈东安庆龙王浩伟陈明上海交通大学金属基复合材料国家重点实验室上海200240 上海交通大学机械系统与振动国家重点实验室上海200240

从理论分析角度探讨了超声滚压与单轴拉伸弹性应力场耦合的基本原理,并通过有限元模拟和实验表征依次从数值仿真和实验角度对理论分析结果进行验证,从而发展了一种先进的表面机械强化新工艺—应力超声滚压,并将其成功应用于TiB_(2)/2024... 详细信息

从理论分析角度探讨了超声滚压与单轴拉伸弹性应力场耦合的基本原理,并通过有限元模拟和实验表征依次从数值仿真和实验角度对理论分析结果进行验证,从而发展了一种先进的表面机械强化新工艺—应力超声滚压,并将其成功应用于TiB_(2)/2024和TiB_(2)/7050铝基复合材料表面机械强化效果的增强和抗疲劳性能的提升。结果表明,相较于普通超声滚压,应力超声滚压对TiB_(2)/2024和TiB_(2)/7050铝基复合材料表层压缩残余应力峰值的提升可分别达到所施加单轴拉伸弹性应力水平的45%和70%,可将压缩残余应力影响层深度提升约100μm,从而将两种复合材料样品的疲劳极限在普通超声滚压强化的基础上分别进一步提升6%和5%。

关键词：应力超声滚压铝基复合材料有限元模拟实验表征疲劳

基于钻削力建模的热塑性复合材料钻削力热规律研究

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工具技术 2018年第4期52卷 25-31页

作者：党嘉强齐振超刘勇南京航空航天大学

热塑性复合材料(CFRTP)因韧性强、易修复、可回收等优异性能而广泛运用于飞机制造中,本文主要围绕CFRTP材料钻孔热量规律展开一系列研究。搭建了CFRTP钻削试验平台,采用6刀具进行了一组试验,测得钻削力和钻削温度,建立了钻削力的经验... 详细信息

热塑性复合材料(CFRTP)因韧性强、易修复、可回收等优异性能而广泛运用于飞机制造中,本文主要围绕CFRTP材料钻孔热量规律展开一系列研究。搭建了CFRTP钻削试验平台,采用6刀具进行了一组试验,测得钻削力和钻削温度,建立了钻削力的经验公式和CFRTP钻削热源模型,讨论了转速、进给速度、刀具尺寸与钻削产热之间的关系。试验验证了模型,两者具有较高一致性,可以为控制钻削热进而降低制孔热损伤提供理论依据。

关键词：热塑性复合材料钻削温度钻削力热源模型

Viscosity and structure relationship with equimolar substitution of CaO with MgO in the CaO–MgO–Al_(2)O_(3)–SiO_(2)slag melts

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 70-79页

作者： Yong Hou Shuo Zhang Jie dang Jia Guo Hanghang Zhou Xuewei Lü College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China

Currently,the Al_(2)O_(3)content in the high-alumina slag systems within blast furnaces is generally limited to 16wt%–18.5wt%,making it challenging to overcome this *** most studies that concentrated on managing the MgO/Al_(2)O_(3)ratio or basicity,this paper explored the effect of equimolar substitution of MgO for CaO on the viscosity and structure of a high-alumina CaO-MgO-Al_(2)O_(3)-SiO_(2)slag system,providing theoretical guidance and data to facilitate the application of high-alumina *** results revealed that the viscosity first decreased and then increased with higher MgO substitution,reaching a minimum at 15mol%MgO *** transform infrared spectroscopy(FTIR)results found that the depths of the troughs representing[SiO_(4)]tetrahedra,[AlO_(4)]tetrahedra,and Si-O-Al bending became progressively deeper with increased MgO *** of the Raman spectra showed that the average number of bridging oxygens per Si atom and the X_(Q^(3))/X_(Q^(2))(X_(Q^(i))is the molar fraction of Q^(i) unit,and i is the number of bridging oxygens in a[SiO_(4)]tetrahedral unit)ratio increased from 2.30 and 1.02 to 2.52 and 2.14,respectively,indicating a progressive polymerization of the silicate structure.X-ray photoelectron spectroscopy(XPS)results highlighted that non-bridging oxygen content decreased from 77.97mol% to 63.41mol% with increasing MgO concentration,whereas bridging oxygen and free oxygen contents *** analysis demonstrated a gradual increase in the polymerization degree of the tetrahedral structure with the increase in MgO ***,bond strength is another important factor affecting the slag *** occurrence of a viscosity minimum can be attributed to the complex evolution of bond strengths of non-bridging oxygens generated during depolymerization of the[SiO_(4)]and[AlO_(4)]tetrahedral structures by CaO and MgO.

关键词： aluminosilicate viscosity structure spectroscopy

聚氨酯泡沫绝热层高效精密打磨装置设计与建模

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机床与液压 2020年第2期48卷 59-62,75页

作者：党嘉强陶正瑞徐锦泱王力张崇印任斐上海交通大学机械与动力工程学院上海200240 上海航天设备制造总厂有限公司上海200245

针对现有液氧贮箱的结构特点以及贮箱绝热层打磨中存在的工艺问题,以聚氨酯泡沫塑料自动化打磨机器人为基础,设计出一种能够高效精密地切削去除绝热层材料的打磨装置。该装置包括打磨工具系统、实时测厚系统和控制系统。装置通过实时测... 详细信息

针对现有液氧贮箱的结构特点以及贮箱绝热层打磨中存在的工艺问题,以聚氨酯泡沫塑料自动化打磨机器人为基础,设计出一种能够高效精密地切削去除绝热层材料的打磨装置。该装置包括打磨工具系统、实时测厚系统和控制系统。装置通过实时测厚系统对泡沫层厚度进行精准在线测量,采用直线模组和气动马达分别对刀具进行位置实时控制和转速控制,在获得实时测厚系统所测的厚度值后到达对应的位置对材料进行实时切削,同时辅助有效随动吸尘装置,实现贮箱聚氨酯泡沫绝热层高效自动打磨,在保证加工精度的同时,极大地提高了工作效率。

关键词：聚氨酯泡沫自动打磨装置实时测厚系统