检索结果-南通市图书馆

Chip morphology and cutting temperature of ADC12 aluminum alloy during high-speed milling

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第7期40卷 1915-1923页

作者： Xin-Xin Meng You-Xi Lin School of Mechanical Engineering and Automation Fuzhou UniversityFuzhou 350108China

The ADC12 aluminum alloy is prone to severe tool wear and high cutting heat during high-speed milling because of its high *** study analyzes the highspeed milling process from the perspective of different chip *** influence of cutting temperature on chip morphology was expounded.A two-dimensional orthogonal cutting model was established for finite element analysis(FEA)of high-speed milling of ADC12 aluminum alloy.A theoretical analysis model of cutting force and cutting temperature was proposed based on metal cutting *** variations in chip shape,cutting force,and cutting temperature with cutting speed increasing were analyzed via *** results show that,with the increase in cutting speed,the chip morphology changes from continuous to serrated,and then back to *** serrated chip is weakened and the cutting temperature is lowered when the speed is lower than 600 m·min^(-1)or higher than 1800 m·min^(-1).This study provides a reference for reducing cutting temperature,controlling chip morphology and improving cutting tool life.

关键词： ADC12 aluminum alloy High-speed milling Chip morphology cutting temperature Finite element analysis

cutting temperature and Tool Wear of Hard Turning Hardened Bearing Steel

在线全文

学校读者我要写书评

暂无评论

厦门大学学报（自然科学版） 2002年第S1期41卷 128-129页

作者： LIU Xian-li 1, WEN Dong-hui 2, LI Zhen-jia 1, XIAO Lu 1, YAN Fu-gang 1 (1. Dept of Mechanical Engineering, Harbin University of Science and Technology, Harbin 150080, China 2. Dept of Precision Instrunmetns & Mechanol ogy, Tsinghua University, Beijing 100084, China)

A study was undertaken to investigate the performan ce of PCBN tool in the finish turning GCr15 bearing steel with different hardness between 30～64 HRC. The natural thermocouple was used to measure the cutting tem p erature, tool life and cutting temperature were investigated and compared. The m aterial can be heated by this instrument which using low voltage and high elec trical current, while PCBN can’t be heated by electrifying directly, so the ke ntanium layer coating over the PCBN is heated, so the PCBN is heated and its th ermoelectric property is got by this method. [TPP129,+60mm88mm,Y,PZ#] Fig.1 Effect of cutting depth and workpiec hardness on. the cutting temperatureThe objective was to determine the influence of the workpiece hardness on change s in cutting temperature and tool wear characterize. It can be found from Fig.1 that the cutting temperature show an increasing tendency with the improvement of workpiece hardness within the cutting speed scope when the workpiece hardness i s under HRC50. And on the other hand, it is found that the cutting temperature s how the downtrend with the improvement of workpiece hardness when the workpiece hardness is over HRC50. According to experimental results, the critical hard ness when turning hardened GCr15 bearing steel with PCBN tool is about HRC50. Th e wear causes of PCBN tool have been found out through taking photos on the micr o-shape of PCBN poly-laminate initial surface as well as face and flank of wea r tool and analysis on chemical elements. It is discovered that the PCBN tools a re not suitable for cutting the workpiece at nearly critical hardness, because n ear the critical hardness, PCBN wear at the highest speed. For researching the w ear rule of PCBN tool, the tool wear experiments have been carried on by using b earing steel GCr15 at hardness HRC40 and HRC60 with changing cutting speed. The indexes of tool life equations is gained under two kinds of conditions w hich are bigger than 0.6, so the effec

关键词： cutting temperature tool wear hard turning pol ycrystalline cubic boron nitride (PCBN) hardened bearing steel

Theoretical modeling of cutting temperature in high-speed end milling process for die/mold machining

在线全文

学校读者我要写书评

暂无评论

Journal of University of Science and Technology Beijing 2005年第1期12卷 90-95页

作者： YingTang MechanicalEngineeringSchool UniversityofScienceandTechnologyBeijingBeijing100083China

A parametric model of cutting temperature generated in end milling process is developed according to the thermal mechanism of end milling as an intermittent operation, which periodically repeats the cycle of heating under cutting and cooling under non-cutting. It shows that cutting speed and the tool-workpiece engagement condition are determinative for tool temperature in the operation. The suggested model was investigated by tests of AlTiN coated endmill machining hardened die steel JIS SKD61, where cutting temperature on the flank face of tool was measured with an optical fiber type radiation thermometer. Experimental results show that the tendency of cutting temperature to increase with cutting speed and engagement angle is intensified with the progressing tool wear.

关键词： end milling cutting temperature intermittent cutting die/mold machining

Study on cutting Force,cutting temperature and Machining Residual Stress in Precision Turning of Pure Iron with Different Grain Sizes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2020年第4期33卷 159-167页

作者： Yinfei Yang Lu Jin Jinpeng Zhu Jinxing Kong Liang Li College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Pure iron is one of the difficult-to-machine materials due to its large chip deformation,adhesion,work-hardening,and built-up edges formation during *** leads to a large workpiece deformation and challenge to meet the required technical ***,under varying the grain size of pure iron,the influence of cutting speed,feed,and depth of cut on the cutting force,heat generation,and machining residual stresses were explored in the turning process to improve the machinability without compromising the mechanical properties of the *** experimental findings have depicted that the influence of grain size on cutting force in the precision turning process is not ***,the cutting temperature and residual stress of machining fine-grain iron were much smaller than the coarse grain at all levels of cutting parameters.

关键词： Pure iron Grain size cutting parameter cutting force cutting temperature Residual stress

STUDY ON THE cutting temperature IN GEAR HOBBING

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 1999年第2期12卷 63-68页

作者： Liu, Dawei Bai, Zhimin Guo, Hongqi 青岛大学车辆与交通工程研究中心山东青岛 266071 吉林职业师范学院吉林长春天津大学天津

According to work tool thermocouple principle,the equipment for measuring hobbing temperature is *** changing character of cutting temperature in gear hobbing,the relation between cutting conditions and hobbing temperature,and the influence of cutting conditions on hobbing temperature are discussed by means of *** these have provided the reference standards for the equitably selecting cutting conditions and geometrical parameter of hob,prolonging the life of gear hobs,and predicting processes of gear hobbing.

关键词： Gear hobbing cutting temperature cutting conditions

Prediction of temperature field in machined workpiece surface during the cutting of Inconel 718 coated with surface-active media

在线全文

学校读者我要写书评

暂无评论

Advances in Manufacturing 2023年第3期11卷 378-389页

作者： Qing-An Yin Zhan-Qiang Liu Bing Wang School of Mechanical Engineering Shandong UniversityJinan 250061People's Republic of China Key National Demonstration Center for Experimental Mechanical Engineering Education/Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MQE Jinan 250061People's Republic of China

The heat generated and accumulated on the machined surface of an Inconel 718 workpiece causes thermal damage during the cutting ***-active media with high thermal conductivity coated on the workpiece to be machined may have the potential to reduce the generation of cutting *** this study,a theoretical model for predicting the instantaneous machined surface temperature field is proposed for surface-active thermal conductive medium(SACM)-assisted cutting based on the finite element and Fourier heat transfer *** cutting experiments were performed to verify the results predicted using the proposed surface-temperature field *** SACMs with various thermal conductivities were used to coat Inconel 718 surface to be *** embedded into the workpiece were used to measure the cutting temperature at different points on the machined workpiece surface during the cutting *** experimental results were in agreement with the predicted temperatures,and the maximum error between the experimental results and predicted temperatures was approximately 9.5%.The cutting temperature on the machined surface decreased with an increase in the thermal conductivity of the *** graphene SACM with high thermal conductivity can effectively reduce the temperature from 542℃ to 402℃,which corresponds to a reduction of approximately 26%.The temperature reduction due to SACM decreases with an increase in the distance between the temperature prediction point and machined workpiece *** conclusion,the cutting temperatures on the machined workpiece surface can be reduced by coating with SACM.

关键词： Surface-active thermal conductive media(SACM) Finite element model cutting heat cutting temperature Inconel 718

Prediction of Wearing of cutting Tools Using Real Time Machining Parameters and temperature Using Rayleigh-Ham Method

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

Modern Mechanical Engineering 2023年第2期13卷 35-54页

作者： Jean Nyatte Nyatte Fabrice Alban Epee Wilba Christophe Kikmo Samuel Batambock Claude Valéry Ngayihi Abbe Robert Nzengwa E3M Laboratory National Higher Polytechnic School Douala University of Douala Douala Cameroon Institut Universitaire de Technologie (IUT-BOIS) University of Yaoundé I Mbalmayo Cameroon

Wear of cutting tools is a big concern for industrial manufacturers, because of their acquisition cost as well as the impact on the production lines when they are unavailable. Law of wear is very important in determining cutting tools lifespan, but most of the existing models don’t take into account the cutting temperature. In this work, the theoretical and experimental results of a dynamic study of metal machining against cutting temperature of a treated steel of grade S235JR with a high-speed steel tool are provided. This study is based on the analysis of two complementary approaches, an experimental approach with the measurement of the temperature and on the other hand, an approach using modeling. Based on unifactorial and multifactorial tests (speed of cut, feed, and depth of cut), this study allowed the highlighting of the influence of the cutting temperature on the machining time. To achieve this objective, two specific approaches have been selected. The first was to measure the temperature of the cutting tool and the second was to determine the wear law using Rayleigh-Ham dimensional analysis method. This study permitted the determination of a law that integrates the cutting temperature in the calculations of the lifespan of the tools during machining.

关键词： Machining cutting temperature Modeling Wear cutting Tool

基于ABAQUS的陶瓷颗粒增强铝基复合材料切削特性仿真分析

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

Coupling effect of micro-textured tools and cooling conditions on the turning performance of aluminum alloy 6061

建模与仿真 2024年第2期13卷 1623-1629页

作者：赵浪上海理工大学机械工程学院，上海

陶瓷颗粒增强铝基复合材料是一种重要的结构材料，因其具有优异的力学性能、高温稳定性和良好的耐蚀性等特点，被广泛应用于航空、汽车、船舶、电子等领域。本文利用Digimat建立了不同增强颗粒(AL2O3、SiC、TiC)下的铝基复合材料并通过A... 详细信息

陶瓷颗粒增强铝基复合材料是一种重要的结构材料，因其具有优异的力学性能、高温稳定性和良好的耐蚀性等特点，被广泛应用于航空、汽车、船舶、电子等领域。本文利用Digimat建立了不同增强颗粒(AL2O3、SiC、TiC)下的铝基复合材料并通过ABAQUS仿真分析了切削速度和切削深度对切削力和切削温度的影响机制。研究结果表明，陶瓷颗粒增强铝基复合材料的切削行为受多种因素共同影响。首先，在相同切削条件下，TiC增强颗粒的切削力和切削温度最大，SiC次之，AL2O3最小，其次，随着切削速度和切削深度的增加，切削力和切削温度逐渐增大，但切削深度主要影响切削速度，切削速度主要影响切削温度。综合而言，本研究为理解不同增强颗粒下的陶瓷颗粒增强铝基复合材料在切削过程中的力学和热学特性提供了重要参考。

关键词：陶瓷颗粒增强铝基复合材料 ABAQUS 增强颗粒切削力切削温度 Ceramic Particle Reinforced Aluminum Matrix Composite ABAQUS Reinforced Particle cutting Force cutting temperature

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Advances in Manufacturing 2023年第4期11卷 663-681页

作者： Guo-Liang Liu Jin-Tao Zheng Chuan-Zhen Huang Shu-Feng Sun Xin-Fu Liu Long-Jie Dai De-Xiang Wang Xiang-Yu Wang Key Lab of Industrial Fluid Energy Conservation and Pollution Control Ministry of EducationKey Lab of Industrial Fluid Energy Conservation and Pollution ControlMinistry of EducationSchool of Mechanical and Automotive EngineeringQingdao University of TechnologyQingdao266520ShandongPeople’s Republic of China State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha410083People’s Republic of China Key Laboratory of High-Efficiency and Clean Mechanical Manufacture(Ministry of Education) School of Mechanical EngineeringShandong UniversityJinan250061People’s Republic of China School of Mechanical Engineering Yanshan UniversityQinhuangdao066004HebeiPeople’s Republic of China Qingdao Choho Ind Co Ltd Qingdao266705ShandongPeople’s Republic of China School of Mechanical Engineering University of JinanJinan250022People’s Republic of China

Micro-texturing has been widely proven to be an effective technology for achieving sustainable ***,the performance of micro-textured tools under different cooling conditions,especially their coupling effect on machined surface integrity,was scarcely *** this paper,the non-textured,linear micro-grooved,and curvilinear micro-grooved inserts were used to turn aluminum alloy 6061 under dry,emulsion,and liquid nitrogen cryogenic cooling *** coupling effects of different micro-textures and cooling conditions on cutting force,cutting temperature,and machined surface integrity,including the surface roughness,work hardening,and residual stress,were revealed and discussed in *** indicated that the micro-grooved tools,especially the curvilinear micro-grooved tools,not only reduced the cutting force and cutting temperature,but also improved the machined surface *** addition,the micro-grooved tools can cooperate with the emulsion or liquid nitrogen to reduce the cutting force,cutting temperature,and improve the machined surface integrity generally,although the combination of emulsion cooling condition and micro-grooved tools generated negative coupling effects on cutting forces and surface work ***,the combination of curvilinear micro-grooved cutting tools and cryogenic cooling condition resulted in the lowest cutting force and cutting temperature,which generated the surface with low roughness,weak work hardening,and compressive residual stress.

关键词： Micro-grooved cutting tool Cooling condition cutting force cutting temperature Surface integrity