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Theoretical Modeling and Surface Roughness Prediction of Microtextured Surfaces in Ultrasonic Vibration-Assisted Milling
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作者 Chenbing Ni Junjie Zhu +3 位作者 Youqiang Wang Dejian Liu Xuezhao Wang Lida Zhu 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2024年第2期163-183,共21页
Textured surfaces with certain micro/nano structures have been proven to possess some advanced functions,such as reducing friction,improving wear and increasing wettability.Accurate prediction of micro/nano surface te... Textured surfaces with certain micro/nano structures have been proven to possess some advanced functions,such as reducing friction,improving wear and increasing wettability.Accurate prediction of micro/nano surface textures is of great significance for the design,fabrication and application of functional textured surfaces.In this paper,based on the kinematic analysis of cutter teeth,the discretization of ultrasonic machining process,transformation method of coordinate systems and the cubic spline data interpolation,an integrated theoretical model was established to characterize the distribution and geometric features of micro textures on the surfaces machined by different types of ultrasonic vibration-assisted milling(UVAM).Based on the theoretical model,the effect of key process parameters(vibration directions,vibration dimensions,cutting parameters and vibration parameters)on tool trajectories and microtextured surface morphology in UVAM is investigated.Besides,the effect of phase difference on the elliptical shape in 2D/3D ultrasonic elliptical vibration-assisted milling(UEVAM)was analyzed.Compared to conventional numerical models,the method of the cubic spline data interpolation is applied to the simulation of microtextured surface morphology in UVAM,which is more suitable for characterizing the morphological features of microtextured surfaces than traditional methods due to the presence of numerous micro textures.The prediction of surface roughness indicates that the magnitude of ultrasonic amplitude in z-direction should be strictly limited in 1D rotary UVAM,2D and 3D UEVAM due to the unfavorable effect of axial ultrasonic vibration on the surface quality.This study can provide theoretical guidance for the design and fabrication of microtextured surfaces in UVAM. 展开更多
关键词 Theoretical modeling Microtextured surface Ultrasonic vibration-assisted milling Cubic spline interpolation surface roughness
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Influence of high-speed milling parameter on 3D surface topography and fatigue behavior of TB6 titanium alloy 被引量:19
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作者 姚倡锋 武导侠 +3 位作者 靳淇超 黄新春 任军学 张定华 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第3期650-660,共11页
High-speed milling of titanium alloys is widely used in aviation and aerospace industries for its high efficiency and good quality.In order to optimize the machining parameters in high-speed milling TB6 titanium alloy... High-speed milling of titanium alloys is widely used in aviation and aerospace industries for its high efficiency and good quality.In order to optimize the machining parameters in high-speed milling TB6 titanium alloy,experiments of high-speed milling and fatigue were conducted to investigate the effect of parameters on 3D surface topography and fatigue life.Based on the fatigue fracture,the effect mechanism of surface topography on the fatigue crack initiation was proposed.The experiment results show that when the milling speed ranged from 100 m/min to 140 m/min,and the feed per tooth ranged from 0.02 mm/z to 0.06 mm/z,the obtained surface roughness were within the limit(0.8 μm).Fatigue life decreased sharply with the increase of surface equivalent stress concentration factor.The average error of fatigue life between the established model and the experimental results was 6.25%.The fatigue cracks nucleated at the intersection edge of machined surface. 展开更多
关键词 TB6 titanium alloy high-speed milling surface roughness surface topography fatigue life fatigue fracture
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ANALYSIS ON SURFACE INTEGRITY DURING HIGH SPEED MILLING FOR NEW DAMAGE-TOLERANT TITANIUM ALLOY 被引量:11
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作者 史琦 何宁 +2 位作者 李亮 赵威 刘晓丽 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2012年第3期222-226,共5页
Surface integrity of a new damage-tolerant titanium alloy (TC21), including surface roughness, microhardness and metallurgical structure is investigated when normal and high speed milling are used at different tool ... Surface integrity of a new damage-tolerant titanium alloy (TC21), including surface roughness, microhardness and metallurgical structure is investigated when normal and high speed milling are used at different tool wear status. Results show that good surface integrity of TC21 can be obtained in high speed milling. In addition, even in acutely worn stages, there is no so-called serious hardening layer (or white layer) according to the studies on microhardness and metallurgical structure. 展开更多
关键词 surface integrity surface roughness MICROHARDNESS high speed milling
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EQUIVALENT NORMAL CURVATURE APPROACH MILLING MODEL OF MACHINING FREEFORM SURFACES 被引量:5
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作者 YI Xianzhong MA Weiguo +2 位作者 QIHaiying YAN Zesheng GAO Deli 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2008年第3期52-57,共6页
A new milling methodology with the equivalent normal curvature milling model machining freeform surfaces is proposed based on the normal curvature theorems on differential geometry. Moreover, a specialized whirlwind m... A new milling methodology with the equivalent normal curvature milling model machining freeform surfaces is proposed based on the normal curvature theorems on differential geometry. Moreover, a specialized whirlwind milling tool and a 5-axis CNC horizontal milling machine are introduced. This new milling model can efficiently enlarge the material removal volume at the tip of the whirlwind milling tool and improve the producing capacity. The machining strategy of this model is to regulate the orientation of the whirlwind milling tool relatively to the principal directions of the workpiece surface at the point of contact, so as to create a full match with collision avoidance between the workpiece surface and the symmetric rotational surface of the milling tool. The practical results show that this new milling model is an effective method in machining complex three- dimensional surfaces. This model has a good improvement on finishing machining time and scallop height in machining the freeform surfaces over other milling processes. Some actual examples for manufacturing the freeform surfaces with this new model are given. 展开更多
关键词 Equivalent normal curvature milling model Whirlwind milling method Freeform surfaces 5-axis CNC machine Differential geometry
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EXPERIMENT ON SURFACE INTEGRITY OF MILLING TOOL FOR HARDENED STEEL SKD11
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作者 景璐璐 沈中 +4 位作者 陈明 胡祖光 励政伟 许辉 祝新发 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2007年第2期157-163,共7页
To evaluate the new designed cutting tools for high-efficiency milling of the hardened die steel SKD11,surface integrities of millers with different geometric structures are analyzed, considering the surface roughness... To evaluate the new designed cutting tools for high-efficiency milling of the hardened die steel SKD11,surface integrities of millers with different geometric structures are analyzed, considering the surface roughness, micrograph of chips, surface microhardness, residual stress and metallurgical texture of the surface layer. The in fluences of geometric characteristics of different cutting tools and their wear characteristics on the surface integrity are studied. Results show that the milling tool with rake angle; 5 of the hardened diesteel. The generation of saw-tooth chips is depressed when a reasonable positive rake angle is selected. And the compressive residual stress is induced on the machined surface in milling the hardened die steel. The occurrence of surface softening is postponed by increasing the clearance angle and reducing the tool flank wear. 展开更多
关键词 high-efficiency milling hardened steel SKD 11 surface integrity STABILITY
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Research on Surface Roughness of Supersonic Vibration Auxiliary Side Milling for Titanium Alloy
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作者 Xuetao Wei Caixu Yue +3 位作者 Desheng Hu Xianli Liu Yunpeng Ding Steven Y.Liang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2022年第5期100-111,共12页
The processed surface contour shape is extracted with the finite element simulation software.The difference value of contour shape change is used as the parameters of balancing surface roughness to construct finite el... The processed surface contour shape is extracted with the finite element simulation software.The difference value of contour shape change is used as the parameters of balancing surface roughness to construct finite element model of supersonic vibration milling in cutting stability domain.The surface roughness trial scheme is designed in the orthogonal test design method to analyze the surface roughness test result in the response surface methodology.The surface roughness prediction model is established and optimized.Finally,the surface roughness finite element simulation prediction model is verified by experiments.The research results show that,compared with the experiment results,the error range of the finite element simulation model is 27.5%–30.9%,and the error range of the empirical model obtained by the response surface method is between 4.4%and 12.3%.So,the model in this paper is accurate and will provide the theoretical basis for the optimization study of the auxiliary milling process of supersonic vibration. 展开更多
关键词 Side milling Axial vibration Ultrasonic milling Finite element simulation Linear regression surface roughness
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Modelling of the In uence of Tool Runout on Surface Generation in Micro Milling 被引量:4
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作者 Wanqun Chen Yazhou Sun +1 位作者 Dehong Huo Xiangyu Teng 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2019年第1期152-160,共9页
Micro milling is a flexible and economical method to fabricate micro components with three-dimensional geometry features over a wide range of engineering materials. But the surface roughness and micro topography alway... Micro milling is a flexible and economical method to fabricate micro components with three-dimensional geometry features over a wide range of engineering materials. But the surface roughness and micro topography always limit the performance of the machined micro components. This paper presents a surface generation simulation in micro end milling considering both axial and radial tool runout. Firstly, a surface generation model is established based on the geometry of micro milling cutter. Secondly, the influence of the runout in axial and radial directions on the surface generation are investigated and the surface roughness prediction is realized. It is found that the axial runout has a significant influence on the surface topography generation. Furthermore, the influence of axial runout on the surface micro topography was studied quantitatively, and a critical axial runout is given for variable feed per tooth to generate specific surface topography. Finally, the proposed model is validated by means of experiments and a good correlation is obtained. The proposed surface generation model o ers a basis for designing and optimizing surface parameters of functional machined surfaces. 展开更多
关键词 surface generation ROUGHNESS prediction surface TOPOGRAPHY RUNOUT Micro milling
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Numerical Analysis and Experimental Validation of a Submerged Inlet on the Plane Surface 被引量:6
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作者 孙姝 郭荣伟 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2005年第3期199-205,共7页
In order to get a deep insight of a submerged inlet on the plane surface, the integrated flow field of the inlet and fuselage has been numerically studied. The investigation is mainly focused on the formation of the t... In order to get a deep insight of a submerged inlet on the plane surface, the integrated flow field of the inlet and fuselage has been numerically studied. The investigation is mainly focused on the formation of the total pressure distribution at the exit of the inlet, the structure of the inner flow and the effects of the boundary layer along the fuselage on the performance of the inlet. Moreover, in comparison with the experimental data at different angles of attack, yaws and mass flow ratios, the reliabilities of the computational fluid dynamics(CFD) studied are verified. Results indicate: (1) the CFD results agree well with the experiment results and the relative errors of the total pressure coefficient is less than 1% ; (2) at the inlet's exit, the contour of total pressure obtained by CFD is similar to the experiment result except the contour in the low total pressure zone in CFD is slightly larger; (3) the secondary flow at the cross section behave as two counter-rotating vortices. Along the flow direction, the fields influenced by the vortex pair transport downstream and expand to the whole section at the exit; (4) the total pressure loss at the exit of the submerged inlet can be divided into external loss and internal loss. Usually, the external loss is greater than the internal loss, and both decrease with the augment of the Mach number at the exit. In addition, when the angle of attack ranges from -2° to 8°, the total pressure coefficient ascends gradually, due to the reduction of the external loss caused by the less boundary layer flow captured and the invisible change of the internal loss. 展开更多
关键词 submerged inlet on the plane surface CFD boundary layer counter-rotating vortices total pressure coefficient
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Influence of Minimum Quantity Lubrication Parameters on Tool Wear and Surface Roughness in Milling of Forged Steel 被引量:4
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作者 YAN Lutao YUAN Songmei LIU Qiang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2012年第3期419-429,共11页
The minimum quantity of lubrication(MQL) technique is becoming increasingly more popular due to the safety of environment.Moreover,MQL technique not only leads to economical benefits by way of saving lubricant costs... The minimum quantity of lubrication(MQL) technique is becoming increasingly more popular due to the safety of environment.Moreover,MQL technique not only leads to economical benefits by way of saving lubricant costs but also presents better machinability.However,the effect of MQL parameters on machining is still not clear,which needs to be overcome.In this paper,the effect of different modes of lubrication,i.e.,conventional way using flushing,dry cutting and using the minimum quantity lubrication(MQL) technique on the machinability in end milling of a forged steel(50CrMnMo),is investigated.The influence of MQL parameters on tool wear and surface roughness is also discussed.MQL parameters include nozzle direction in relation to feed direction,nozzle elevation angle,distance from the nozzle tip to the cutting zone,lubricant flow rate and air pressure.The investigation results show that MQL technique lowers the tool wear and surface roughness values compared with that of conventional flood cutting fluid supply and dry cutting conditions.Based on the investigations of chip morphology and color,MQL technique reduces the cutting temperature to some extent.The relative nozzle-feed position at 120°,the angle elevation of 60° and distance from nozzle tip to cutting zone at 20 mm provide the prolonged tool life and reduced surface roughness values.This fact is due to the oil mists can penetrate in the inner zones of the tool edges in a very efficient way.Improvement in tool life and surface finish could be achieved utilizing higher oil flow rate and higher compressed air pressure.Moreover,oil flow rate increased from 43.8 mL?h to 58.4 mL?h leads to a small decrease of flank wear,but it is not very significant.The results obtained in this paper can be used to determine optimal conditions for milling of forged steel under MQL conditions. 展开更多
关键词 minimum quantity lubrication(MQL) milling PARAMETER tool wear surface roughness
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A model of deformation of thin-wall surface parts during milling machining process 被引量:11
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作者 王凌云 黄红辉 +2 位作者 Rae W.WEST 李厚佳 杜继涛 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第5期1107-1115,共9页
A three-dimensional finite element model was established for the milling of thin-walled parts. The physical model of the milling of the part was established using the AdvantEdge FEM software as the platform. The alumi... A three-dimensional finite element model was established for the milling of thin-walled parts. The physical model of the milling of the part was established using the AdvantEdge FEM software as the platform. The aluminum alloy impeller was designated as the object to be processed and the boundary conditions which met the actual machining were set. Through the solution, the physical quantities such as the three-way cutting force, the tool temperature, and the tool stress were obtained, and the calculation of the elastic deformation of the thin-walled blade of the free-form surface at the contact points between the tool and the workpiece was realized. The elastic deformation law of the thin-walled blade was then predicted. The results show that the maximum deviation between the predicted value and the actual measured machining value of the elastic deformation was 26.055 μm; the minimum deviation was 2.011 μm, with the average deviation being 10.154 μm. This shows that the prediction is in close agreement with the actual result. 展开更多
关键词 thin-walled surface parts milling force elastic deformation finite element model
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Partial Surface Damper to Suppress Vibration for Thin Walled Plate Milling 被引量:3
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作者 Jiahao SHI Qinghua SONG +1 位作者 Zhanqiang LIU Xing AI 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2017年第3期632-643,共12页
The material removal rate and required work- piece surface quality of thin-walled structure milling are greatly limited due to its severe vibration, which is directly associated with the dynamic characteristics of the... The material removal rate and required work- piece surface quality of thin-walled structure milling are greatly limited due to its severe vibration, which is directly associated with the dynamic characteristics of the system. Therefore, the suppression of vibration is an unavoidable problem during milling. A novel partial surface damping method is proposed to modify the mode of the thin walled cantilever plate and to suppress vibration during milling. Based on classical plate theory, the design criterion is analyzed and configuration of the partial surface damper is introduced, in which viscoelastic plate and constraining plate are attached to the surface of the plate to increase the system's natural frequency and loss factor. In order to obtain the energy expression of the cutting system, the Ritz method is used to describe the unknown displacements. Then, with Lagrange's equation, the natural frequency and loss factor are calculated. In addition, the plate is divided into a finite number of square elements, and the regulation of treated position is studied based on theoretic and experimental analysis. The milling tests are conducted to verify its damping performance and the experimentalresults show that with treatment of partial surface damper, the deformation of the hare plate is reduced from 0.27 mm to 0.1 mm, while the vibration amplitude of the bare plate is reduced from 0.08 mm to 0.01 mm. The proposed research provides the instruction to design partial surface damper. 展开更多
关键词 Partial surface damper milling process Thin-walled plate
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GENERALIZED SIMULATION MODEL FOR MILLED SURFACE TOPOGRAPHY-APPLICATION TO PERIPHERAL MILLING 被引量:2
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作者 Xu Anping Qu Yunxia Li Weimin School of Mechanical Engineering, Hebei University of Technology Zhang Dawei Huang Tian Tianjin University 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2001年第2期121-126,共6页
Based on analyzing various factors influencing milled surface topography, firstly, a generalized model for milled surface topography is proposed. Secondly, using the principles of transformation matrix and vector oper... Based on analyzing various factors influencing milled surface topography, firstly, a generalized model for milled surface topography is proposed. Secondly, using the principles of transformation matrix and vector operation, the trajectory equation of cutting edge relative to workpiece is derived. Then, a three dimensional topography simulation algorithm is constructed through dividing the workpiece into regular grids. Finally, taking the peripheral milling process as an example, the generalized model is simplified, and the corresponding simulation examples are given. The results indicate that it is very efficient for the generalized model to be used to analyze and simulate the peripherally milled surface topography. 展开更多
关键词 Generalized simulation model Arbitrary contour mill Peripheral milling process surface topography
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Investigation of Surface Roughness in High-Speed Milling of Aeronautical Aluminum Alloy 被引量:1
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作者 潘永智 艾兴 +1 位作者 赵军 万熠 《Journal of Beijing Institute of Technology》 EI CAS 2008年第1期20-24,共5页
An approach is presented to optimize the surface roughness in high-speed finish milling of 7050- T7451 aeronautical aluminum alloy. In view of this, the multi-linear regression model for surface roughness has been dev... An approach is presented to optimize the surface roughness in high-speed finish milling of 7050- T7451 aeronautical aluminum alloy. In view of this, the multi-linear regression model for surface roughness has been developed in terms of slenderness ratio, cutting speed, radial depth-of-cut and feed per tooth by means of orthogonal experimental design. Variance analyses were applied to check the adequacy of the predictive model and the significances of the independent input parameters. Response contours of surface roughness were generated by using response surface methodology (RSM). From these contours, it was possible to select an optimum combination of cutting parameters that improves machining efficiency without increasing the surface roughness. 展开更多
关键词 surface roughness response surface methodology multi-linear regression high-speed milling
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Vector modeling of robotic helical milling hole movement and theoretical analysis on roughness of hole surface 被引量:2
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作者 SHAN Yi-cai HE Ning +2 位作者 LI Liang ZHAO Wei YANG Yin-fei 《Journal of Central South University》 SCIE EI CAS 2013年第7期1818-1824,共7页
To avoid the machine problems of excessive axial force, complex process flow and frequent tool changing during robotic drilling holes, a new hole-making technology (i.e., helical milling hole) was introduced for desig... To avoid the machine problems of excessive axial force, complex process flow and frequent tool changing during robotic drilling holes, a new hole-making technology (i.e., helical milling hole) was introduced for designing a new robotic helical milling hole system, which could further improve robotic hole-making ability in airplane digital assembly. After analysis on the characteristics of helical milling hole, advantages and limitations of two typical robotic helical milling hole systems were summarized. Then, vector model of helical milling hole movement was built on vector analysis method. Finally, surface roughness calculation formula was deduced according to the movement principle of helical milling hole, then the influence of main technological parameters on surface roughness was analyzed. Analysis shows that theoretical surface roughness of hole becomes poor with the increase of tool speed ratio and revolution radius. Meanwhile, the roughness decreases according to the increase of tool teeth number. The research contributes greatly to the construction of roughness prediction model in helical milling hole. 展开更多
关键词 helical milling hole robotic hole-making system vector modeling theoretical surface roughness
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Analysis and Control of Surface Delamination Defects During Milling of Orthogonal Aramid Fiber‑Reinforced Composites Laminates 被引量:2
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作者 SHI Zhenyu DUAN Ningmin +1 位作者 LI Xin WANG Zhaohui 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2020年第3期353-359,共7页
The aramid fiber-reinforced composites(AFRC)can increase the durability of corresponding applications such as aerospace,automobile and other large structural parts,due to the improvement in hardness,heat build-up,wear... The aramid fiber-reinforced composites(AFRC)can increase the durability of corresponding applications such as aerospace,automobile and other large structural parts,due to the improvement in hardness,heat build-up,wear properties and green environmental protection.However,because of its complex multiphase structure and unique heterogeneity and anisotropy,the poor compression fatigue resistance and the incident surface fibrillation are inevitable.To improve the assembly precision of AFRC,mechanical processing is necessary to meet the dimensional accuracy.This paper focuses on the influence of contour milling parameters on delamination defects during milling of AFRC laminates.A series of milling experiments are conducted and two different kinds of delamination defects including tearing delamination and uncut-off delamination are investigated.A computing method and model based on brittle fracture for the two different types of delamination are established.The results can be used for explaining the mechanism and regularity of delamination defects.The control strategy of delamination defects and evaluation method of finished surface integrity are further discussed.The results are meaningful to optimize cutting parameters,and provide a clear understanding of surface defects control. 展开更多
关键词 aramid fiber-reinforced composites(AFRC) milling process delamination defects surface control prediction model
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Simulation Analysis of Surface Roughness for Milling Process 被引量:1
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作者 Bai Liu Jixuan Yuan Zhenjiu Zhang 《Natural Science》 2019年第5期127-135,共9页
Surface roughness is one of the most important evaluation indexes in machine cutting. In order to analyze how the tool path affects the roughness of the surface after milling, series of simulations are implemented in ... Surface roughness is one of the most important evaluation indexes in machine cutting. In order to analyze how the tool path affects the roughness of the surface after milling, series of simulations are implemented in MasterCAM. We set up the same processing conditions with same parameters such as speed, material and feed rate etc. in these simulations, but different processing paths are used. We choose three paths: the parallel milling along the X-Y axis direction, the parallel milling along the Z-X or Z-Y axis direction and the streamline processing in the simulations. At the same time, end miller, arc miller and ball miller are respectively selected in the software. So there are totally 9 simulations of the milling process that are performed. Then the experimental cutting processes are performed correspondingly and the surface roughness and the accuracy are measured. The results show that the milling effect of the arc is better and the waste is minimal in the parallel milling along the Z-X or Z-Y axis direction with the end mills. 展开更多
关键词 surface ROUGHNESS Tool PATH MACHINING ACCURACY milling Simulation
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Effect of Radial Depth on Vibration and Surface Roughness During Face Milling of Austenitic Stainless Steel 被引量:1
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作者 申阳 陈永洁 +7 位作者 张俐 方海涛 庞佳 刘敏 王社权 马晓魁 张京 刘志林 《Transactions of Tianjin University》 EI CAS 2011年第5期336-339,共4页
This paper studies the influence of radial depth on vibration, chip formation and surface roughness during face milling of AISl3O4 austenitic stainless steel with indexable cemented carbide milling cutters. The amplit... This paper studies the influence of radial depth on vibration, chip formation and surface roughness during face milling of AISl3O4 austenitic stainless steel with indexable cemented carbide milling cutters. The amplitude of vibration acceleration increased with the increasing radial depth up to 80 mm. And the domain vibration frequency varied with the radial depth. In this paper, three types of chips were found: C shape, long shape and spiral shape. The minimum surface roughness value occurred when the radial depth equalled 40 mm in the experiment. Irregular changes of chip curl radius and chip thickness could be attributed to different numbers of alternately engaged teeth when the feed and speed were fixed. Surface roughness is related to forced vibration and chip formation. Radial depth with different numbers of alternately engaged teeth could significantly influence the forced vibration, chip formation, and surface roughness. 展开更多
关键词 austenitic stainless steel face milling radial depth VIBRATION surface roughness chip formation
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Choice of reference surfaces for machined surface roughness in milling of SiC_p/Al composites 被引量:4
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作者 王阳俊 黄海波 +1 位作者 陈立国 孙立宁 《Journal of Central South University》 SCIE EI CAS 2014年第11期4150-4156,共7页
In order to choose the appropriate reference surface on the machined surface roughness of Si Cp/Al composites, the cutting experiments of Si Cp/Al composites were carried out, and the machined surface topography was m... In order to choose the appropriate reference surface on the machined surface roughness of Si Cp/Al composites, the cutting experiments of Si Cp/Al composites were carried out, and the machined surface topography was measured by OLS3000 Confocal laser scanning microscope. The 3D measured data of machined surface topography were analyzed by the area power spectrum density. The result shows that the texture of machined surface topography in milling of Si Cp/Al composites is almost isotropic. This is the reason that the values of Rq at different locations on the same machined surface are obviously different. Through the comparison of performance of different filtering methods, the robust least squares reference surface can be used to extract the surface roughness of SiC p/Al composites effectively. 展开更多
关键词 SiCp/Al composites surface topography milling filtering method power spectrum density
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Study on End Milling Generation Surface Model and Simulation in View of Main Axle's Tolerance
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作者 LI Shi-jie, LIU Riu-su, ZHANG Ai-jun (Department of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China) 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期39-,共1页
In accordance with the relative movement between end-milling cutter and workpiece surface, a theoretical generation model for milled surface was established with the movement error of principal axle considered. Then t... In accordance with the relative movement between end-milling cutter and workpiece surface, a theoretical generation model for milled surface was established with the movement error of principal axle considered. Then the milled surfaces under various cutting condition were simulated, the results of which showed that end milled surfaces were of "vaulted profile", heights of surface irregularty at various points to be different with maximum value in the middle and smaller at both sides, the difference were determined by diameter of milling cutter, feeding speed, ratio between the diameter of milling cutter and teeth point curve radius and width of workpiece. The study results can be applied to quality prediction of milled surfaces for precision and/or super precision milling operation. 展开更多
关键词 end milling milled surface generation model SIMULATION vaulted profile
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Study on Surface Roughness in Micro Milling of Single Crystal Materials 被引量:1
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作者 Qi Gao Po Jin Guangyan Guo 《Mechanical Engineering Science》 2019年第1期14-17,共4页
Micro milling is a machining method of high precision and efficiency for micro components and features.In order to study the surface quality of single crystal materials in micro milling,the two-edged cemented carbide ... Micro milling is a machining method of high precision and efficiency for micro components and features.In order to study the surface quality of single crystal materials in micro milling,the two-edged cemented carbide tool milling cutter with 0.4 mm diameter was used,and the orthogonal experiment was completed on the micro-milling of single crystal aluminum material.Through the analysis of statistical results,the primary and secondary factor which impacting on surface quality were found as follows:spindle speed,feed rate,milling depth.The ideal combination of optimized process parameters were obtained,when the spindle speed was 36000 r/min,the milling depth was 10μm,the feed rate was 80μm/s,which made the milling surface roughness is 0.782μm and minimal.Single crystal materials removal mechanism were revealed,and the influence of cutting parameters on micro-milling surface were discussed,the reason of tool wear was analyzed.Those provide a certain theoretical and experimental basis for micro milling of single crystal materials. 展开更多
关键词 surface ROUGHNESS Micro milling Single crystal MATERIALS ORTHOGONAL experiment
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