The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
N. Fang - One of the best experts on this subject based on the ideXlab platform.
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machining with tool chip contact on the tool secondary Rake Face part i a new slip line model
International Journal of Mechanical Sciences, 2002Co-Authors: N. FangAbstract:Abstract Given the growing number of applications of groove-type chip breaker tools in modern machining, it is becoming increasingly important to study the tool–chip contact on the tool secondary Rake Face. This type of tool–chip contact significantly changes not only the state of stresses in the plastic deformation region, but also changes the distribution of forces and temperatures over the tool Rake Face. A new slip-line model accounting for the tool–chip contact on the tool secondary Rake Face is proposed in this paper. The model also takes into account chip curl and incorporates seven slip-line models developed for machining during the last six decades as special cases. Dewhurst and Collins's matrix technique for numerically solving slip-line problems and Powell's algorithm of nonlinear optimization are employed in the mathematical formulation of the model. The inputs of the model include (a) the tool primary Rake angle γ1, (b) the tool secondary Rake angle γ2, (c) the tool land length h, (d) the undeformed chip thickness t1, (e) the ratio of hydrostatic pressure PA to the material shear flow stress k, (f) the ratio of frictional shear stress τ1 on the tool primary Rake Face to the material shear flow stress k, and (g) the ratio of frictional shear stress τ2 on the tool secondary Rake Face to the material shear flow stress k. The outputs of the model include (a) the cutting force Fc/kt1w and the thrust force Ft/kt1w, (b) the chip up-curl radius Ru, (c) the chip thickness t2, and (d) the natural tool–chip contact length ln.
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Machining with tool–chip contact on the tool secondary Rake Face—Part I: a new slip-line model
International Journal of Mechanical Sciences, 2002Co-Authors: N. FangAbstract:Abstract Given the growing number of applications of groove-type chip breaker tools in modern machining, it is becoming increasingly important to study the tool–chip contact on the tool secondary Rake Face. This type of tool–chip contact significantly changes not only the state of stresses in the plastic deformation region, but also changes the distribution of forces and temperatures over the tool Rake Face. A new slip-line model accounting for the tool–chip contact on the tool secondary Rake Face is proposed in this paper. The model also takes into account chip curl and incorporates seven slip-line models developed for machining during the last six decades as special cases. Dewhurst and Collins's matrix technique for numerically solving slip-line problems and Powell's algorithm of nonlinear optimization are employed in the mathematical formulation of the model. The inputs of the model include (a) the tool primary Rake angle γ1, (b) the tool secondary Rake angle γ2, (c) the tool land length h, (d) the undeformed chip thickness t1, (e) the ratio of hydrostatic pressure PA to the material shear flow stress k, (f) the ratio of frictional shear stress τ1 on the tool primary Rake Face to the material shear flow stress k, and (g) the ratio of frictional shear stress τ2 on the tool secondary Rake Face to the material shear flow stress k. The outputs of the model include (a) the cutting force Fc/kt1w and the thrust force Ft/kt1w, (b) the chip up-curl radius Ru, (c) the chip thickness t2, and (d) the natural tool–chip contact length ln.
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Development of the new-type indexable inserts with helical Rake Faces
Proceedings of the Institution of Mechanical Engineers Part B: Journal of Engineering Manufacture, 1997Co-Authors: N. Fang, M Wang, C NedeßAbstract:AbstractA kind of new-type indexable insert with a three-dimensionally shaped Rake Face, namely the helical Rake Face, is developed in this present work, contributing to the formation of short conical helical chips acceptable for modern automated and unattended machining systems. The geometric parameters of the helical Rake Face consist of the helical gradient, the helical length, the beginning Rake angle at the tool nose and the end Rake angle on the cutting edge. The influences of these parameters on the side-curling of the chip and on the chip breakability are investigated. Under the cutting conditions employed in this paper, the cutting force measuring results show that the cutting component of the resultant tool force and the radial force when using the tool insert with the helical Rake Face are less than those when using the type CNMG120408-ZF tool insert, a kind of commercially available insert widely used.
Jinguo Chen - One of the best experts on this subject based on the ideXlab platform.
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experimental study and simulation on the chip sticking welding of the carbide cutter s Rake Face
International Journal on Interactive Design and Manufacturing (ijidem), 2018Co-Authors: Jinguo Chen, Minli Zheng, Jingyang Feng, Yushuang SunAbstract:For the study of the tool-chip sticking–welding principle and welding layer formation conditions of the carbide cutter’s Rake Face, the actual conditions of sticking–welding occurrence during the cutting process were analyzed and the cutting test system which is equivalent to sticking–welding phenomenon was set up. Combined with the finite element simulation technology, sticking–welding phenomenon was analyzed. The effect of stress and temperature field with different cutting parameters on the occurrence of tool-chip sticking–welding and adhesion failure was revealed and adhesion failure location resulting from tool-chip sticking–welding was also obtained. Then aimed at the cutting temperature in the damaged area of the Rake Face, the mapping model was established using design-expert based on the response surFace methodology. The trend of cutting temperature and the state of sticking–welding under the interaction between different parameters were obtained, which provided a theoretical basis for the selection of cutting parameters to avoid sticking–welding.
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Research on the theoretical model of the Rake Face wear of carbide cutting tool
The International Journal of Advanced Manufacturing Technology, 2018Co-Authors: Jinguo Chen, Minli Zheng, Zhang Wei, Sun Yushuang, Qunhua TangAbstract:Elements in the carbide tool and workpiece material will diffuse during the cutting process, thus affecting tool life. To address the problem of diffusion wear on the Rake Face of the carbide tool, a cutting test scheme was proposed to analyze the heat and force conditions of element diffusion. A static clamping diffusion experiment of the tool and workpiece material was conducted to obtain diffusion data on the tool-chip element. Based on the analysis of element diffusion in the contact area of the tool-chip during the cutting process, the theoretical model of element diffusion in the tool was established using the Gaussian solution of Fick’s second law to determine the threshold value of the element concentration when the tool was damaged. The hardness of the tool surFace was also measured and analyzed. The results showed that the wear depth of the Rake Face can be predicted using the established element diffusion model, whose results are consistent with the experimental findings. The element concentration on the crescent surFace at the tool Rake Face remained constant under different cutting time, while the loss of W was more obvious. The experiments of the diffusion couple verified that element diffusion causes a decrease in the hardness of the tool surFace, and tool hardness increases with greater distance from the bonding surFace, which eventually reaches the hardness of the tool substrate. The research results lay a theoretical foundation for investigating the failure process of carbide cutting tools and predicting their service life.
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Experimental study and simulation on the chip sticking–welding of the carbide cutter’s Rake Face
International Journal on Interactive Design and Manufacturing (IJIDeM), 2017Co-Authors: Jinguo Chen, Minli Zheng, Li Pengfei, Jingyang Feng, Sun YushuangAbstract:For the study of the tool-chip sticking–welding principle and welding layer formation conditions of the carbide cutter’s Rake Face, the actual conditions of sticking–welding occurrence during the cutting process were analyzed and the cutting test system which is equivalent to sticking–welding phenomenon was set up. Combined with the finite element simulation technology, sticking–welding phenomenon was analyzed. The effect of stress and temperature field with different cutting parameters on the occurrence of tool-chip sticking–welding and adhesion failure was revealed and adhesion failure location resulting from tool-chip sticking–welding was also obtained. Then aimed at the cutting temperature in the damaged area of the Rake Face, the mapping model was established using design-expert based on the response surFace methodology. The trend of cutting temperature and the state of sticking–welding under the interaction between different parameters were obtained, which provided a theoretical basis for the selection of cutting parameters to avoid sticking–welding.
Sun Yushuang - One of the best experts on this subject based on the ideXlab platform.
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Research on the theoretical model of the Rake Face wear of carbide cutting tool
The International Journal of Advanced Manufacturing Technology, 2018Co-Authors: Jinguo Chen, Minli Zheng, Zhang Wei, Sun Yushuang, Qunhua TangAbstract:Elements in the carbide tool and workpiece material will diffuse during the cutting process, thus affecting tool life. To address the problem of diffusion wear on the Rake Face of the carbide tool, a cutting test scheme was proposed to analyze the heat and force conditions of element diffusion. A static clamping diffusion experiment of the tool and workpiece material was conducted to obtain diffusion data on the tool-chip element. Based on the analysis of element diffusion in the contact area of the tool-chip during the cutting process, the theoretical model of element diffusion in the tool was established using the Gaussian solution of Fick’s second law to determine the threshold value of the element concentration when the tool was damaged. The hardness of the tool surFace was also measured and analyzed. The results showed that the wear depth of the Rake Face can be predicted using the established element diffusion model, whose results are consistent with the experimental findings. The element concentration on the crescent surFace at the tool Rake Face remained constant under different cutting time, while the loss of W was more obvious. The experiments of the diffusion couple verified that element diffusion causes a decrease in the hardness of the tool surFace, and tool hardness increases with greater distance from the bonding surFace, which eventually reaches the hardness of the tool substrate. The research results lay a theoretical foundation for investigating the failure process of carbide cutting tools and predicting their service life.
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Experimental study and simulation on the chip sticking–welding of the carbide cutter’s Rake Face
International Journal on Interactive Design and Manufacturing (IJIDeM), 2017Co-Authors: Jinguo Chen, Minli Zheng, Li Pengfei, Jingyang Feng, Sun YushuangAbstract:For the study of the tool-chip sticking–welding principle and welding layer formation conditions of the carbide cutter’s Rake Face, the actual conditions of sticking–welding occurrence during the cutting process were analyzed and the cutting test system which is equivalent to sticking–welding phenomenon was set up. Combined with the finite element simulation technology, sticking–welding phenomenon was analyzed. The effect of stress and temperature field with different cutting parameters on the occurrence of tool-chip sticking–welding and adhesion failure was revealed and adhesion failure location resulting from tool-chip sticking–welding was also obtained. Then aimed at the cutting temperature in the damaged area of the Rake Face, the mapping model was established using design-expert based on the response surFace methodology. The trend of cutting temperature and the state of sticking–welding under the interaction between different parameters were obtained, which provided a theoretical basis for the selection of cutting parameters to avoid sticking–welding.
Minli Zheng - One of the best experts on this subject based on the ideXlab platform.
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experimental study and simulation on the chip sticking welding of the carbide cutter s Rake Face
International Journal on Interactive Design and Manufacturing (ijidem), 2018Co-Authors: Jinguo Chen, Minli Zheng, Jingyang Feng, Yushuang SunAbstract:For the study of the tool-chip sticking–welding principle and welding layer formation conditions of the carbide cutter’s Rake Face, the actual conditions of sticking–welding occurrence during the cutting process were analyzed and the cutting test system which is equivalent to sticking–welding phenomenon was set up. Combined with the finite element simulation technology, sticking–welding phenomenon was analyzed. The effect of stress and temperature field with different cutting parameters on the occurrence of tool-chip sticking–welding and adhesion failure was revealed and adhesion failure location resulting from tool-chip sticking–welding was also obtained. Then aimed at the cutting temperature in the damaged area of the Rake Face, the mapping model was established using design-expert based on the response surFace methodology. The trend of cutting temperature and the state of sticking–welding under the interaction between different parameters were obtained, which provided a theoretical basis for the selection of cutting parameters to avoid sticking–welding.
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Research on the theoretical model of the Rake Face wear of carbide cutting tool
The International Journal of Advanced Manufacturing Technology, 2018Co-Authors: Jinguo Chen, Minli Zheng, Zhang Wei, Sun Yushuang, Qunhua TangAbstract:Elements in the carbide tool and workpiece material will diffuse during the cutting process, thus affecting tool life. To address the problem of diffusion wear on the Rake Face of the carbide tool, a cutting test scheme was proposed to analyze the heat and force conditions of element diffusion. A static clamping diffusion experiment of the tool and workpiece material was conducted to obtain diffusion data on the tool-chip element. Based on the analysis of element diffusion in the contact area of the tool-chip during the cutting process, the theoretical model of element diffusion in the tool was established using the Gaussian solution of Fick’s second law to determine the threshold value of the element concentration when the tool was damaged. The hardness of the tool surFace was also measured and analyzed. The results showed that the wear depth of the Rake Face can be predicted using the established element diffusion model, whose results are consistent with the experimental findings. The element concentration on the crescent surFace at the tool Rake Face remained constant under different cutting time, while the loss of W was more obvious. The experiments of the diffusion couple verified that element diffusion causes a decrease in the hardness of the tool surFace, and tool hardness increases with greater distance from the bonding surFace, which eventually reaches the hardness of the tool substrate. The research results lay a theoretical foundation for investigating the failure process of carbide cutting tools and predicting their service life.
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Experimental study and simulation on the chip sticking–welding of the carbide cutter’s Rake Face
International Journal on Interactive Design and Manufacturing (IJIDeM), 2017Co-Authors: Jinguo Chen, Minli Zheng, Li Pengfei, Jingyang Feng, Sun YushuangAbstract:For the study of the tool-chip sticking–welding principle and welding layer formation conditions of the carbide cutter’s Rake Face, the actual conditions of sticking–welding occurrence during the cutting process were analyzed and the cutting test system which is equivalent to sticking–welding phenomenon was set up. Combined with the finite element simulation technology, sticking–welding phenomenon was analyzed. The effect of stress and temperature field with different cutting parameters on the occurrence of tool-chip sticking–welding and adhesion failure was revealed and adhesion failure location resulting from tool-chip sticking–welding was also obtained. Then aimed at the cutting temperature in the damaged area of the Rake Face, the mapping model was established using design-expert based on the response surFace methodology. The trend of cutting temperature and the state of sticking–welding under the interaction between different parameters were obtained, which provided a theoretical basis for the selection of cutting parameters to avoid sticking–welding.
Yushuang Sun - One of the best experts on this subject based on the ideXlab platform.
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experimental study and simulation on the chip sticking welding of the carbide cutter s Rake Face
International Journal on Interactive Design and Manufacturing (ijidem), 2018Co-Authors: Jinguo Chen, Minli Zheng, Jingyang Feng, Yushuang SunAbstract:For the study of the tool-chip sticking–welding principle and welding layer formation conditions of the carbide cutter’s Rake Face, the actual conditions of sticking–welding occurrence during the cutting process were analyzed and the cutting test system which is equivalent to sticking–welding phenomenon was set up. Combined with the finite element simulation technology, sticking–welding phenomenon was analyzed. The effect of stress and temperature field with different cutting parameters on the occurrence of tool-chip sticking–welding and adhesion failure was revealed and adhesion failure location resulting from tool-chip sticking–welding was also obtained. Then aimed at the cutting temperature in the damaged area of the Rake Face, the mapping model was established using design-expert based on the response surFace methodology. The trend of cutting temperature and the state of sticking–welding under the interaction between different parameters were obtained, which provided a theoretical basis for the selection of cutting parameters to avoid sticking–welding.