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Cutting Finite Element Simulation of Quenched Steel GCr15 Based on ABAQUS

Recent Patents on Mechanical Engineering 2024年第5期17卷 350-364页

作者： Yang, Lin Gong, Junhao Liu, Jialiang Xia, Jianqiu Zhang, Yu Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of Education Harbin University of Science and Technology Harbin China State Key Laboratory of Low-carbon Thermal Power Generation Technology and Equipments Material Research Institute Harbin Boiler Company Limited Heilongjiang Harbin150046 China

Background: The substantial cutting force and elevated cutting temperature during the machining of hardened steel GCr15 exacerbate tool wear. Objective: In this study, the influence of cutting parameters on cutting force and cutting temperature in the process of hard-cutting GCr15 was studied, the cutting parameters were optimized, and the cutting force and cutting temperature were predicted. Methods: The cutting simulation model was constructed using ABAQUS software, and the cutting force and cutting temperature were investigated under various cutting parameters through range analysis, variance analysis, and signal-to-noise ratio transformation analysis. Results: The simulation and experimental results demonstrated that the cutting force could be optimized by utilizing cutting speed vc=140 m/min, feed rate f=0.1 mm/r, and cutting depth ap=0.1 mm. Under these conditions, the cutting force in the x-direction was measured as 78.560N, while the cutting force in the y-direction was 32.423N. Moreover, for achieving the optimal cutting temperature, the recommended cutting parameters were cutting speed vc=120 m/min, feed rate f=0.1 mm/r, and cutting depth ap=0.4 mm. Conclusion: Compared to the conventional analytical method, which is burdened with high costs and low efficiency, the patent leverages finite element simulation technology to replicate the hardcutting process and its underlying cutting mechanism. This innovation simplifies the otherwise complex and laborious experimental and measurement procedures. By studying cutting force and cutting temperature, the optimization of cutting parameters can be achieved, thus offering valuable theoretical insights for practical production. © 2024 Bentham Science Publishers.

关键词： ABAQUS

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Effect of Ni interlayer on microstructures and mechanical properties of 2205 duplex stainless steel joint by laser oscillating welding

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Journal of Iron and Steel Research International 2024年第10期31卷 2463-2474页

作者： Jing-wei Yang Xu-yang Liu Tao Li Lai-cai Chen Kai Yang Zong-ye Ding Jie Zhang Jian Qiao School of Mechatronic Engineering and Automation Foshan UniversityFoshan528000GuangdongChina Key Laboratory of Advanced Manufacturing Technology of the Ministry of Education Guizhou UniversityGuiyang550025GuizhouChina State Key Laboratory of Advanced Brazing Filler Metals&Technology Zhengzhou Research Institute of Mechanical Engineering Co.Ltd.Zhengzhou450001HenanChina China National United Engineering Laboratory for Advanced Bearing Tribology Henan University of Science and TechnologyLuoyang471023HenanChina School of Mechanical Engineering University of Science and Technology BeijingBeijing100083China

Laser oscillating welding of 2205 duplex stainless steel was performed using Ni interlayer as filler *** influence of stirring effect caused by laser oscillating and Ni addition in the behavior of molten pool and the microstructure evolution was *** results shows that Ni addition decreased the ratio of chromium equivalent and nickel equivalent in the molten pool and accelerated the austenitic *** austenite/ferrite ratio was regulated,and the precipitation of nitrides was suppressed in the weld *** stirring effect caused by the oscillating beam facilitated the uniform distribution of Ni elements within the molten pool,promoting the formation of the homogeneous microstructures in the weld *** increasing the thickness of Ni interlayer,both the dimension and the peak temperature of molten pool decrease,further increasing the cooling rate and refining the grain *** the thickness of Ni interlayer was 50μm,the austenite/ferrite ratio in the weld seam was close to 1:1,and the grain size reached the minimum *** tensile strength and ductility of the welded joint using Ni interlayer with thickness were 774 MPa and 25%,respectively,significantly improving the mechanical properties of 2205 duplex stainless steel joint welded without Ni addition.

关键词： 2205 duplex stainless steel Ni interlayer Laser welding Microstructure Mechanical property

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Research on wear state prediction of ball end milling cutter based on entropy measurement of tool mark texture images

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Journal of Central South University 2025年第1期32卷 174-188页

作者： LI Mao-yue LU Xin-yuan LIU Ze-long ZHANG Ming-lei Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of EducationHarbin University of Science and TechnologyHarbin 150080China

Efficient tool condition monitoring techniques help to realize intelligent management of tool life and reduce tool usage *** this paper,the influence of different wear degrees of ball-end milling cutters on the texture shape of machining tool marks is investigated,and a method is proposed for predicting the wear state(including the position and degree of tool wear)of ball-end milling cutters based on entropy measurement of tool mark texture ***,data samples are prepared through wear experiments,and the change law of the tool mark texture shape with the tool wear state is ***,a two-dimensional sample entropy algorithm is developed to quantify the texture ***,the processing parameters and tool attitude are integrated into the prediction process to predict the wear value and wear position of the ball end milling *** testing,the correlation between the predicted value and the standard value of the proposed tool condition monitoring method reaches 95.32%,and the accuracy reaches 82.73%,indicating that the proposed method meets the requirement of tool condition monitoring.

关键词： ball-end cutter wear tool condition monitoring surface texture texture quantifier sample entropy

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Construction of target detection teaching platform based on improved YOLOv5s algorithm

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International Journal of Wireless and Mobile Computing 2025年第2期28卷 216-222页

作者： Li, Gongfa Zhu, Housheng Tang, Xinjie Jiang, Du Zou, Chunlong Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Hubei Wuhan China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Hubei Wuhan China Hubei University of Automotive Technology College of Mechanical Engineering Shiyan442002 China

Measurement and control technology and instrumentation, as a high-tech intensive specialty integrating disciplines such as electrical engineering, optics, control theory, computer science and instrumentation science, has a strong interdisciplinary nature. This presents challenges to traditional teaching methods which often fail to fully cultivate students' practical and innovative abilities. To address this, a multi-level teaching model focused on the cultivation of practical and innovative skills has been developed, reforming the original experimental teaching mode and integrating the establishment of experimental teaching platforms. The proposed teaching model integrates theoretical knowledge with practical application, utilising improved experimental platforms such as YOLOv5s for hands-on teaching. The reformed teaching model has enhanced students' comprehensive abilities and achieved noticeable success in teaching practice. Copyright © 2025 Inderscience Enterprises Ltd.

关键词： Students

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Surface activity and cleaning performance of rosin-based quaternary ammonium salt type asymmetric Gemini surfactants

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Chinese Journal of Chemical Engineering 2024年第9期73卷 70-80页

作者： Haoyu Feng Yaoqi Pan Yijia Zhang Zhuofan Zhang Yunye Huang Linxi Hou Longqiang Xiao Department of Materials-Oriented Chemical Engineering College of Chemical EngineeringFuzhou UniversityFuzhou 350116China Qingyuan Innovation Laboratory Quanzhou 362801China Fujian Key Laboratory of Advanced Manufacturing Technology of Specialty Chemicals Fuzhou UniversityFuzhou 350116China

Rosin,a renewable and abundant resource,has been extensively processed and chemically modified to endow it with special properties,especially in the surfactant *** this study,four rosin-based quaternary ammonium asymmetric gemini surfactants(RGS-2-n)with different alkyl chain lengths(n=12,14,16,18)were synthesized using a simple two-step method based on dehydroabietylamine as the raw *** feasibility of these surfactants for cleaning purposes was comprehensively evaluated,suggesting that the surfactants own high surface activity and good cleaning ***,by successfully introducing the amine group of dehydroabietylamine into the hydrophilic group of the surfactants,we avoided its potential harm to the environment and water *** functional theory proves rosin-based gemini surfactants with asymmetric structure can further improve cleaning ***,our findings suggests that RGS-2-n surfactants are promising and sustainable candidates for cleaning electric plates,and provide new opportunities for rosin application in the electric industry.

关键词： Electronic components Asymmetric gemini surfactants Cleaning performance Rosin

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Inverse design and accurate optimization of layered structured seeding mechanism for sugarcane planters

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International Journal of Agricultural and Biological Engineering 2023年第6期16卷 107-115页

作者： Jiaodi Liu Qingli Chen Hongzhen Xu Yong Hua Xiaoman Wu Key Laboratory of Advanced Manufacturing and Automation Technology(Guilin University of Technology) Education Department of Guangxi Zhuang Autonomous RegionGuilin 541006GuangxiChina College of Mechanical and Control Engineering Guilin University of TechnologyGuilin 541004GuangxiChina

Existing sugarcane planters are difficult to have ideal seeding trajectory and motion attitude at the same time, and the speed is difficult to meet the requirements at the critical stage, resulting in poor stability, which ultimately makes it impossible to ensure that the sugarcane seeding is carried out in accordance with the agronomic requirements to ensure that the cane buds are oriented toward the wall of the seeding trench. Aiming at the second-order non-circular planetary gear system pendulum seeding mechanism of the planter, the paper innovatively adopts the combination of inverse design and multi-objective layered accurate optimization to solve the problems of attitude, speed and trajectory that do not meet the requirements of fixed-attitude seeding that still exists in the process of sugarcane seeding. The second-order non-circular planetary gear system is simplified into a three-rod two-degree-of-freedom mechanism, and the radius of the pitch curve of each non-circular gear is solved inversely by actively preplanning the static trajectory of the cane seed motion and analyzing the law of motion of the rod assembly. Determining the range of cane seed attitude angles in different motion phases as the first layer optimization objective, and fine-tuning the position of static trajectory key type value points to achieve the first layer optimization. Based on the non-circular gear pitch curve obtained from optimization, the interpolation points are marked on each non-circular gear pitch curve of the second-order non-circular planetary gear system, and based on the parameter optimization method of human-computer interaction, the radius values corresponding to the interpolation points of the non-circular gear pitch curve are fine-tuned to optimize the pitch curves, so as to satisfy the speed requirements of the cane species in each stage, and at the same time to make the convexity of non-circular gears in line with the principle of gear mesh, so as to complete the

关键词： sugarcane planting seeding mechanism inverse design layered structure optimization

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Mn-based cathode materials for rechargeable batteries

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Science China Chemistry 2024年第1期67卷 87-105页

作者： Xu Zhang Shiqi Liu Boya Wang Guoqing Wang Haozhe Du Xuanyu Wang Haidong Zhang Shu Zhao Lin Wang Haijun Yu Institute of Advanced Battery Materials and Devices Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China Create Energy&Benefit Future Co.Ltd. Beijing 100176China

The rapid expansion of renewable energies asks for great progress of energy-storage technologies for sustainable energy supplies,which raises the compelling demand of high-performance rechargeable *** satisfy the huge demand from the coming energy-storage market,the resource and cost-effectiveness of rechargeable batteries become more and more ***(Mn)as a key transition element with advantages including high abundance,low cost,and low toxicity derives various kinds(spinels,layered oxides,polyanions,Prussian blue analogs,etc.)of high-performance Mn-based electrode materials,especially cathodes,for rechargeable batteries ranging from Li-ion batteries,Na-ion batteries,aqueous batteries,to multivalent metal-ion *** is anticipated that Mn-based materials with Mn as the major transition-metal element will constitute a flourishing family of Mn-based rechargeable batteries(Mn RBs)for large-scale and differentiated energy-storage *** the other hand,several critical issues including Jahn-Teller effect,Mn dissolution,and O release greatly hinder the pace of Mn RBs,which require extensive material optimizations and battery/system *** review aims to provide an investigation about Mn-based materials and batteries for the coming energy-storage demands,with compelling issues and challenges that must be overcome.

关键词： manganese cathode materials Mn-based rechargeable batteries energy storage

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Mechanism of plasticity enhancement of AZ31B magnesium alloy sheet by accumulative alternating back extrusion

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Journal of Magnesium and Alloys 2023年第5期11卷 1791-1801页

作者： Ye Wang Feng Li Nan Bian Hua Qiu Du Peng Da Huo School of Materials Science and Engineering Harbin University of Science and TechnologyHarbin 150040PR China Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of EducationHarbin University of Science and TechnologyHarbin 150080PR China

Accumulative alternating back extrusion was a potential fine-grain modification *** this paper,it was an innovative attempt to develop high-performance magnesium alloy sheet by this *** the condition of 350 K,commercial AZ31 magnesium alloy was made into billet by accumulative alternating back extrusion,and then extruded into fine-grain magnesium alloy *** a systematic study of its microstructure and mechanical properties,the results showed that the initial state had an important influence on the evolution of the structure during *** accumulative alternating back extrusion to produce the billet,the grain size of the sheet obtained by extrusion was significantly refined,which was related to the accumulation of deformation and grain refinement during the alternating loading *** refinement caused the proportion of dynamic recrystallization inside the sheet with 2 cycles of accumulative alternating back extrusion to drop to 27%.With the increase of extrusion cycles from 2 to 4,the high density of dislocations led to an increase in the proportion of dynamic recrystallization and finer *** texture changed from strong basal texture to weak bimodal *** results of uniaxial tensile test show that due to grain refinement and texture change,the yield strength was significantly reduced,and the plasticity was significantly *** was verified that accumulative alternating back extrusion was meaningful for subsequent processing,and it also provided scientific guidance for the development of fine-grained magnesium alloy sheet.

关键词： Magnesium alloy Alternating back extrusion Microstructure uniformity Bimodal texture Texture weakening Sheet anisotropy

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Boosting bidirectional conversion of polysulfide driven by the built-in electric field of MoS_(2)/MoP Mott–Schottky heterostructures in lithium–sulfur batteries

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Journal of advanced Ceramics 2023年第10期12卷 1872-1888页

作者： Meixiu Song Yanan Liu Jingzhe Hong Xiaoshuang Wang Xiaoxiao Huang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China MIIT Key Laboratory of Advanced Structural–Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China

Heterostructure engineering for sulfur hosts is an effective way to achieve interfacial synergistic effects on suppressing the“shuttle effect”of polysulfides and thus improve electrochemical performance of lithium–sulfur(Li–S)*** selection and design of different components into heterostructures is vital to enhance the synergistic ***,MoS_(2)/MoP Mott–Schottky heterostructure nanoparticles decorated on reduced graphene oxide(MoS_(2)/MoP@rGO)are fabricated and used as sulfur host *** calculation and experiment results reveal that the in-situ introduction of MoP could tune the electronic structure,activate the basal plane of MoS_(2),and achieve the interfacial synergistic effects between adsorption(MoS_(2))and fast conversion(MoP).Such synergistic effects enable MoS_(2)/MoP@rGO to not only remarkably facilitate Li_(2)S deposition during the discharging process but also significantly accelerate the Li_(2)S dissolution during the charging process,demonstrating bidirectional promotion ***,the designed cathode delivers initial capacity of 919.5 mA·h·g^(−1)with capacity of 502.3 mA·h·g^(−1)remaining after 700 cycles at 0.5 *** under higher sulfur loading of 4.31 mg·cm^(−2)and lower electrolyte to sulfur(E/S)ratio of 8.21μL·mg^(−1),the MoS_(2)/MoP@rGO@S cathode could still achieve good capacity and cycle *** work provides a novel and efficient structural design strategy of sulfur hosts for high-performance Li–S energy storage systems.

关键词： MoS_(2)/MoP Mott-Schottky heterostructures synergistic effect bidirectional polysulfide conversion shuttle effect lithium-sulfur(Li-S)batteries

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Phosphorous-doped carbon nanotube/reduced graphene oxide aerogel cathode enabled by pseudocapacitance for high energy and power zinc-ion hybrid capacitors

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Chinese Chemical Letters 2024年第2期35卷 570-576页

作者： Junjun Yao Fuzhi Li Ruyi Zhou Chenchen Guo Xinru Liu Yirong Zhu Hunan Key Laboratory of Green Metallurgy and New Energy Materials College of Materials and Advanced ManufacturingHunan University of TechnologyZhuzhou 412007China College of packaging and Material Engineering Hunan University of TechnologyZhuzhou 412007China

The design and development of energy storage device with high energy/power density has become a research ***-ion hybrid capacitors(ZHCs)are considered as one of the most promising ***,the application of ZHCs is hindered by their low energy density at high power density due to the unsatisfactory cathode *** this study,a novel 3D phosphorus-doped carbon nanotube/reduced graphene oxide(P-CNT/rGO)aerogel cathode is synthesized through a synergistic modification strategy of CNT insertion and P doping modification combined with 3D porous *** as-obtained P-CNT/rGO aerogel cathode manifests significantly increased surface aera,expanded interlayer spacing,and enhanced pseudocapacitance behavior,thus leading to significantly enhanced specific capacitance and superb ions transport *** as-assembled ZHC based on P-CNT/rGO cathode delivers a superior energy density of 42.2 Wh/kg at an extreme-high power density of 80 kW/kg and excellent cycle ***-depth kinetic analyses are undertaken to prove the enhanced pseudocapacitance behavior and exceptional power output capability of ***,the reaction mechanism of physical and chemical adsorption/desorption of electrolyte ions on the P-CNT/rGO cathode is revealed by systematic ex-situ *** work can provide a valuable reference for developing advanced graphene-based cathode for high energy/power density ZHCs.

关键词： Graphene aerogel Phosphorus doping Pseudocapacitance Zinc-ion hybrid capacitors Energy storage mechanism

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