Papers by Author: Bin Jiang

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Authors: Bin Jiang, Ling Jiang, Min Li Zheng, J. Zhou
Abstract: According to the theory of axiomatic design, to process function decomposition and grey cluster analysis of high speed milling cutter with indexable inserts, found the design matrix of cutter, and propose the design method of cutter based on high speed milling safety, stability and efficiency. High speed face milling cutter for machining aluminum alloy was developed according to design method and design matrix of cutter, experiment and fuzzy object element evaluation for cutting performance of cutter was accomplished. Results showed that there was not design loop which existed in the development of cutter, design process was simplified effectively, cutting energy of high speed milling cutter using axiomatic design method was dispersed, it held higher safety, cutting stability and efficiency, comprehensive cutting performance met the design requirement of high speed milling cutter.
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Authors: Bin Jiang, S.C. Yang, Yin Jin Yang, Min Li Zheng, P. Sun
Abstract: Aim at the uncertainty of vibration behavior in high speed ball-end milling hardened steel, carried out the experiment of high speed milling hardened steel and modal analysis of cutter, studied vibration behavior of cutter and workpiece, and established vibration behavior sequence of high speed milling hardened steel. Using gray system theory, did gray cluster analysis of vibration characteristics, explored the correlation among cutter vibration, workpiece vibration and surface roughness characteristics, put forward the method of characterizing vibration characteristics in high speed ball-end milling hardened steel. The results show that high frequency vibrations of cutter and workpiece are caused by the interaction of centrifugal and dynamic cutting force, the increase of cutter overhang enhances high frequency vibration of cutter, the characteristic of cutter vibration changes from low frequency vibration to interaction of low frequency vibration and high frequency vibration. Using cutters with different overhang, surface roughness of high speed milling hardened steel has similar characteristics, surface roughness in row spacing direction can characterize low frequency vibration of cutter, and surface roughness in feed can characterize resonance characteristic of cutter caused by high frequency vibrations of cutter and workpiece.
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Authors: Shu Cai Yang, Bin Jiang, H.Y. Li, M.L. Zheng, S.J. Wang
Abstract: In order to solve the problem of machined surface damage and machining efficiency decline that caused by the decrease of effective cutting thickness in high speed ball-end milling hardened steel, using high speed cutting adiabatic shearing model, analyzed the adiabatic shearing deformation on hardened steel, and proposed the criterion of chip separating position. Analyzed the force in the transformation process from cutting to plowing, the influence of cutter deformation on cutting thickness was studied, and established the minimum cutting thickness model. Having done finite element analysis of cutter and experiment of high speed milling hardened steel, the validity of the minimum cutting thickness model was proved. The results show that cutting thickness changes from small to large, and then from large to small under the influence of cutting trajectory and tool edge radius. The deformation of cutter leads to the increase of the minimum cutting thickness, and further enhances chip thickness thinning effect. High feed can compensate cutting thickness thinning and the minimum cutting thickness model provides an effective way to restrain the damage of machined surface and cutter caused by cutter plowing.
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Authors: Bin Jiang, Min Li Zheng, Jun Zhou, D.H. Xia
Abstract: In order to depress cutter vibration caused by high hardness and periodic change of cutting force in high speed milling complex surface, investigated the modal characteristics of ball-end milling cutter through the modal analysis and transient analysis. Using the models of dynamic cutting force and cutting vibration, acquired dynamics characteristics of high speed ball-end milling cutter by the spectrum analysis of dynamic cutting force, simulation analysis of cutting vibration and experiment of high speed milling hardened steel. Results indicate that high speed ball-end milling energy concentrates in few special frequencies, the rotational speed and the numbers of cutter teeth determine the fundamental frequency. High speed ball-end milling cutter easily makes radial bending vibration by the lower modal characteristics, the overhang and inclination angle of cutter affect its dynamics characteristics significantly, and the modal parameters and vibration model of cutter acquired by step response method have higher credibility.
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Authors: Bin Jiang, Hong Jun Yao, Dan Hua Xia, Ying Li, Hong Xu
Abstract: In high speed milling hardened steel, cutting performance of cutter is uncertainty because hardness distribution and machining elements change. Based on the experiments of high speed milling hardened steel, the interaction among cutting force, cutting temperature, cutting vibration, processing surface quality and machining efficiency is investigated by means of interpretative structural modeling method, hierarchical structure model in high speed milling hardened steel is founded, optimization design method of high speed milling performance is proposed. Results show that uneven distribution of hardness swells the interaction of machining elements, and causes cutting vibration and processing surface quality mutations. Hierarchical structure model reveals the relationship between control variables and performance index in high speed milling hardened steel, it helps optimization of process parameters, restrains cutting vibration in high speed milling automobile mould, and improves processing surface quality and machining efficiency.
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Authors: Fu Chun Tao, Guang Chao Chen, Bin Jiang, Bo Chen, Yan Ding
Abstract: Based on the field research, we found that in the course of high-speed face milling aluminum, Cutters components prone to deformation as the role of load such as Centrifugal force, Cutting force and Preload. The deformation will directly affect the the dynamic performance of the cutter. So its necessary to reveal the dynamic response of the deformation cutter. We base on the Dynamic model and the modal analysis model, Obtained the deformation cutters dynamic simulation which the cutters deformation is come from the ANSYS. At last we got the method of identifying cutters deflection deformation by vibration signal. With the method we can effectively identifying milling distortion In the cutting process.
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Authors: Min Li Zheng, Bin Jiang, W. Zhang, J. Liu
Abstract: Based on dynamic loads analysis for high speed milling, to investigate vibration and failure of high speed milling cutter with indexable inserts, and perform modeling for high speed milling stability based on safety. According to the theory of axiomatic design, to process decomposition of function of high speed milling cutter with indexable inserts, found the design matrix of cutter, and propose the design method of cutter based on high speed milling stability, high speed face milling cutter for machining aluminum alloy was developed. The results indicate that an uneven distribution of cutter teeth and higher precision of dynamic balance can depress vibration of cutter, the method of axiomatic design based on stability improves efficiently dynamic cutting stability, the safety and concurrent design cycle of high speed milling cutter.
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Authors: Bin Jiang, Yin Jin Yang, Xian Li Liu, Chang Xing Qi, Xing Fa Zhao
Abstract: In high speed ball-end milling hardened steel, the increase of hardened steel hardness and cutting efficiency make cutting loads changing, and fuzzy and uncertain properties exist in evaluating cutting vibration and machining surface quality. To explore the means for high efficiency and precision machining hardened steel, carried out the experiment of high speed ball-end milling hardened steel, and acquired behavior data of high speed milling characteristic and influencing factors. Founded the model of high speed ball-end milling behavior characteristic using grey system theory, acquired the behavior sequence of high speed ball-end milling hardened steel. Accomplished incidence analysis of high speed milling characteristic, and proposed the solution to high efficiency and precision machining hardened steel. Results indicate that the increase in cutting efficiency makes workpiece vibration and the increase in surface roughness. The influence of the row spacing on the vibration in feed direction is more remarkable than the vibration in row spacing direction. Grey incidence matrix of high speed ball-end milling characteristic reveals the interaction level of characteristic and influencing factors. Increase in rotational speed and row spacing, and decrease in feed per tooth and inclination angle of cutter can restrain availably the vibration in high speed ball-end milling hardened steel, and obtain higher cutting efficiency and surface quality.
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Authors: Bin Jiang, Pei Yi Zhao, Yong Zhong Wang, Yi Hang Fan
Abstract: Adopted the cutting-contact model of high speed ball-end milling hardened steel surfaces, researched distribution characteristics of cutting-contact stress; by researching the influence of the distribution of this stress on cutter wear, clarified the influence theory of milling pattern and cutting parameters on initial wear of milling cutter. By using the method of climbing, conventional milling alternating and changing cutting parameters, verified the influence of milling pattern and cutting parameters on initial wear pattern. The result showed that, initial wear mechanism of high speed milling hardened steel is an interaction of multiple wear mechanisms under the effect of friction and alternating pressure stress, by using conventional milling can significantly reduce concave curvature radius of hardened steel, the contact stress of blade area and front, rear flank, inhibit crushing and wear rate of the milling cutter surfaces. Under this condition, by increasing rotation speed and reducing the feed per blade, will further increase the strength of this effect, and achieve the purpose of reducing the initial wear, inhibiting the wear rate and extending the cutters life.
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Authors: Bin Jiang, Ji Guang Song, Song Tao Wang, Bo Chen, Xuan Chi Liu
Abstract: The article is about the safety for high speed milling tools between macroscopic and mesoscale, making some analysis about the relationship between damage of cutting tools and its components and mesoscale movement, the damage of cutting tools and its components is known. With the boundary conditions of material force damage, using the material design software named MAPS to do molecular dynamics simulation, the simulation is about mesoscale state in different stress, Make sure the various mesoscale movement on stress response rate, the model of intrinsic/extrinsic about the safety for high speed milling tools on a mesoscale is established. Clear the value of intrinsic/extrinsic parameters and mesoscale movement on stress response rate. The regular pattern between damage of cutting tools and its components and mesoscale movement, which could help us to design tools, choose materials of tools and determine cutting parameters.
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