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学者姓名：陈东菊
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Abstract ：
This paper presents an analytical model for identifying process damping caused by interference between tool and workpiece during the cutting process. In contrast to the traditional discrete method, the model identifies the interference area between tool and workpiece using a complete analytical method. The obtained interference area can achieve the accuracy of the result obtained by using a shorter discrete step, but the time required for the model is shorter than that of the discrete method and is unaffected by the discrete step. The influence of tool wear band on the process damping coefficient is also considered. The process damping coefficient is identified based on the interference area obtained by the complete analytical model, and the damping coefficient of the non-linear process is linearized by the energy method. Finally, the cutting stability lobe diagram is drawn considering the influence of process damping, and the cutting stability region is predicted. Compared with the lobe diagram without process damping, it is found that process damping can significantly improve the cutting stability in low-speed cutting, and a series of cutting tests are carried out to verify the correctness of the prediction model.
Keyword ：
Cutting stability Cutting stability Complete analytical method Complete analytical method Stability lobe diagram Stability lobe diagram Process damping Process damping
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| GB/T 7714 | Chen, Dongju , Zhang, Xuan , Li, Shupei et al. A novel process damping identification model and cutting stability prediction [J]. | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY , 2023 , 126 (9-10) : 4573-4579 . |
| MLA | Chen, Dongju et al. "A novel process damping identification model and cutting stability prediction" . | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 126 . 9-10 (2023) : 4573-4579 . |
| APA | Chen, Dongju , Zhang, Xuan , Li, Shupei , Pan, Ri , Sun, Kun , Fan, Jinwei . A novel process damping identification model and cutting stability prediction . | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY , 2023 , 126 (9-10) , 4573-4579 . |
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Abstract ：
The aerostatic spindle often occur offset and additional vibration under the action of external load due to the low stiffness, thus affecting the rotary accuracy of the spindle. In order to solve the problem of unbalanced vibration of the spindle, a new type of controllable radial aerostatic bearing is designed by combining piezoelectric ceramics. A bearing-rotor-piezoelectric ceramic coupling model was established, and the control method of variable structure sliding mode control was used to reduce the vibration amplitude due to the unbalance. From the results of simulation and experiment, it is found that when the disturbance is taken as a constant value, the vibration amplitude increases with the increase of force; when the disturbance force is an unknown random force, the control effect is slightly worse than that when the disturbance force is known, but the rotary accuracy can be improved by this suppression effect on the aerostatic spindle. Finally, the correctness and effectiveness of this control method are proved through experiments.
Keyword ：
Vibration Vibration Vibration suppression Vibration suppression Piezoelectric ceramics Piezoelectric ceramics Aerostatic spindle Aerostatic spindle Variable structure sliding mode Variable structure sliding mode
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| GB/T 7714 | Chen, Dongju , Wang, Handong , Xie, Yinhui et al. Regulating the vibration of aerostatic journal spindle based on piezoelectric ceramics [J]. | JOURNAL OF MANUFACTURING PROCESSES , 2023 , 85 : 1-8 . |
| MLA | Chen, Dongju et al. "Regulating the vibration of aerostatic journal spindle based on piezoelectric ceramics" . | JOURNAL OF MANUFACTURING PROCESSES 85 (2023) : 1-8 . |
| APA | Chen, Dongju , Wang, Handong , Xie, Yinhui , Liang, Dong . Regulating the vibration of aerostatic journal spindle based on piezoelectric ceramics . | JOURNAL OF MANUFACTURING PROCESSES , 2023 , 85 , 1-8 . |
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Abstract ：
A heat-affected zone significantly reduces the mechanical properties of carbon fiber-reinforced plastics (CFRP). However, the beam quality, especially the stability of the beam pointing, limits the heat-affected zone (HAZ) minimization studies. In this study, the HAZ is reduced by improving the pointing stability of the laser beam. A beam pointing stabilization system (BPSS) based on position-sensitive devices and fast steering mirrors (FSMs) was developed. The research focuses on building a control model from the position-sensitive devices' position deviation signals to the FSMs' corrected control angles. The control model can detect and predict the beam pointing deviations and correct the attitudes of the FSMs to correct the beam pointing deviations, improving the beam pointing stability. The performance of the proposed BPSS and the corresponding control model were experimentally verified. The results indicate that the pointing deviations of the corrected beam in the X and Y directions are reduced by 78.08% and 70.28%, respectively. Additionally, the HAZ of CFRP processed with the corrected laser is reduced by 30.8%. The quality of the laser cutting of CFRP is significantly improved.
Keyword ：
carbon fiber-reinforced plastics carbon fiber-reinforced plastics fast steering mirror fast steering mirror beam pointing stability beam pointing stability heat-affected zone heat-affected zone laser processing laser processing
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| GB/T 7714 | Fan, Jinwei , Ren, Xingfei , Pan, Ri et al. Improving laser cutting quality of carbon fiber-reinforced plastics by improving laser beam pointing stability [J]. | OPTICAL ENGINEERING , 2022 , 61 (12) . |
| MLA | Fan, Jinwei et al. "Improving laser cutting quality of carbon fiber-reinforced plastics by improving laser beam pointing stability" . | OPTICAL ENGINEERING 61 . 12 (2022) . |
| APA | Fan, Jinwei , Ren, Xingfei , Pan, Ri , Chen, Dongju , Sun, Kun . Improving laser cutting quality of carbon fiber-reinforced plastics by improving laser beam pointing stability . | OPTICAL ENGINEERING , 2022 , 61 (12) . |
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Abstract ：
Selective laser melting (SLM) provides a great degree of design freedom, but because the forming process is accompanied by multi-scale and multi-physics phenomena, the computational cost of modelling the forming process remains quite high. The cost of testing and simulation can be reduced by creating a model based on a nonlinear system, fitting the nonlinear function between input and output, and choosing the best option for forming quality. In this study, a nonlinear system was created by integrating data mining and statistical inference technologies, and a mix of simulation and experiment was utilized to create a specimen with the desired properties. Firstly, the density of 316L stainless steel specimens formed by SLM with various layer thicknesses was obtained, the important parameters impacting density were examined, and the effect of layer thickness on specimen density was reported. Furthermore, the nonlinear neural network optimization system was built through training and testing in order for the trained network to forecast the nonlinear function's output. Finally, the system is utilized to forecast density in high-efficiency moulding mode, and the test results match the anticipated data well.
Keyword ：
Neural network Neural network Relative density Relative density Selected laser melting Selected laser melting Nonlinear system Nonlinear system Data-drive Data-drive
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| GB/T 7714 | Chen, Dongju , Wang, Peng , Pan, Ri et al. Process optimization of selective laser melting 316L stainless steel by a data-driven nonlinear system [J]. | WELDING IN THE WORLD , 2022 , 66 (3) : 409-422 . |
| MLA | Chen, Dongju et al. "Process optimization of selective laser melting 316L stainless steel by a data-driven nonlinear system" . | WELDING IN THE WORLD 66 . 3 (2022) : 409-422 . |
| APA | Chen, Dongju , Wang, Peng , Pan, Ri , Zha, Chunqing , Fan, Jinwei , Li, Shupei et al. Process optimization of selective laser melting 316L stainless steel by a data-driven nonlinear system . | WELDING IN THE WORLD , 2022 , 66 (3) , 409-422 . |
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Abstract ：
Purpose This research aims to combine the throttling structure with the elastic element to enhance the load performance of aerostatic radial bearing. Design/methodology/approach In this research, a fluid-solid coupling model of the elastic throttling structure is established while considering the interaction between the elastic element and the flow field. The effects of elastic element structural parameters on the stiffness and load capacity of aerostatic radial bearing are then researched. Finally, the effect of elastic element modulus on air film load performance and elastic element deformation is analyzed. Findings The results indicate that the aerostatic radial bearing with elastic element can significantly improve the load capacity and stiffness when compared to the common aerostatic bearing. By choosing the proper combination of parameters, the load performance can be improved by at least 16%. Originality/value The throttling structure of aerostatic bearing is optimized in this work, which significantly enhances the load performance of the aerostatic bearing.
Keyword ：
Elastic element Elastic element Aerostatic bearing Aerostatic bearing Load performance Load performance Fluid-solid coupling Fluid-solid coupling
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| GB/T 7714 | Chen, Dongju , Zhang, Xuan , Pan, Ri et al. Effect of elastic throttling structure on the load performance of aerostatic radial bearing [J]. | INDUSTRIAL LUBRICATION AND TRIBOLOGY , 2022 , 75 (1) : 82-90 . |
| MLA | Chen, Dongju et al. "Effect of elastic throttling structure on the load performance of aerostatic radial bearing" . | INDUSTRIAL LUBRICATION AND TRIBOLOGY 75 . 1 (2022) : 82-90 . |
| APA | Chen, Dongju , Zhang, Xuan , Pan, Ri , Sun, Kun , Fan, Jinwei . Effect of elastic throttling structure on the load performance of aerostatic radial bearing . | INDUSTRIAL LUBRICATION AND TRIBOLOGY , 2022 , 75 (1) , 82-90 . |
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Abstract ：
The dynamic characteristics of the gas film of an aerostatic spindle primary affect workpiece waviness in ultra-precision machining. To improve the machining accuracy of the machine tool and provide a firm theoretical basis for the design of an aerostatic spindle, a simulation model combining transient computational fluid dynamics (CFD) analysis and transient dynamic analysis is established in this study to investigate the dynamic characteristics of the spindle under unstable operating conditions. Based on a large eddy simulation, a three-dimensional flow model of an air film in an aerostatic spindle is established. The simulation results show that the gas flow in the throttle chamber is turbulent, and that complex vortices are formed. Using dynamic grid modeling technology, a CFD numerical model for the unsteady calculation of the spindle is established, and the dynamic characteristics of the gas film are obtained. A transient dynamic simulation model of an aerostatic spindle is established, and the effect of the nonlinear dynamic characteristics of the gas film on the spindle displacement response is investigated. Subsequently, a surface morphology prediction model is established. Results show that film fluctuation significantly affects the dynamic characteristics of the spindle and subsequently affects the generation of surface ripples on the workpiece.
Keyword ：
Ultra-precision flying cutting Ultra-precision flying cutting Dynamic characteristics Dynamic characteristics Surface formation Surface formation Aerostatic spindle Aerostatic spindle
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| GB/T 7714 | Chen, Dong-Ju , Li, Shu-Pei , Zhang, Xuan et al. Relationship between dynamic characteristics of air film of aerostatic spindle and mid-frequency of surface topography [J]. | ADVANCES IN MANUFACTURING , 2022 , 10 (3) : 428-442 . |
| MLA | Chen, Dong-Ju et al. "Relationship between dynamic characteristics of air film of aerostatic spindle and mid-frequency of surface topography" . | ADVANCES IN MANUFACTURING 10 . 3 (2022) : 428-442 . |
| APA | Chen, Dong-Ju , Li, Shu-Pei , Zhang, Xuan , Fan, Jin-Wei . Relationship between dynamic characteristics of air film of aerostatic spindle and mid-frequency of surface topography . | ADVANCES IN MANUFACTURING , 2022 , 10 (3) , 428-442 . |
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Abstract ：
In this paper, a 3D surface topography model for ultra-precision turning is proposed, in which the coupling effect of turning dynamics and dynamics of the aerostatic spindle in microscale is considered. Firstly, the identification model of the tool-workpiece interference area is established by the analytical method, and then the accurate process damping coefficient is obtained. Meanwhile, considering the influence of the dynamic characteristics of the aerostatic spindle on the formation of the workpiece surface morphology, a 5-DOF aerostatic spindle dynamic model is established under the influence of the process damping effect in the cutting process and the microscale effect of the gas film. Then, based on the dynamic model of turning and aerostatic spindle, the surface topography model of ultra-precision turning is established. The effects of spindle speed, cutting width, and feed rate on the surface topography of ultra-precision turning are also analyzed. Finally, the cutting experiment is carried out, the surface morphology obtained from the simulation and experiment is characterized by three-dimensional surface roughness parameters, and the error between the simulation and experimental results is analyzed. The results show that the 3D surface morphology model built in this paper matches the experimental results better, which proves the effectiveness of the model.
Keyword ：
Dynamics Dynamics Ultra-precision turning Ultra-precision turning Aerostatic spindle Aerostatic spindle Surface morphology Surface morphology Process damping Process damping
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| GB/T 7714 | Chen, Dongju , Li, Shupei , Fan, Jinwei . A 3D turning surface model under the action of coupling dynamics of aerostatic spindle and cutting system [J]. | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY , 2022 , 120 (7-8) : 4617-4633 . |
| MLA | Chen, Dongju et al. "A 3D turning surface model under the action of coupling dynamics of aerostatic spindle and cutting system" . | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 120 . 7-8 (2022) : 4617-4633 . |
| APA | Chen, Dongju , Li, Shupei , Fan, Jinwei . A 3D turning surface model under the action of coupling dynamics of aerostatic spindle and cutting system . | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY , 2022 , 120 (7-8) , 4617-4633 . |
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Abstract ：
不同型腔对空气静压轴承性能的影响
Keyword ：
气膜波动 气膜波动 加工精度 加工精度 空气静压轴承 空气静压轴承 气旋现象 气旋现象
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| GB/T 7714 | 陈东菊 , 程锴 , 董丽华 et al. 不同型腔对空气静压轴承性能的影响 [J]. | 陈东菊 , 2021 , (5) : 128-133 . |
| MLA | 陈东菊 et al. "不同型腔对空气静压轴承性能的影响" . | 陈东菊 5 (2021) : 128-133 . |
| APA | 陈东菊 , 程锴 , 董丽华 , 潘日 , 范晋伟 , 制造技术与机床 . 不同型腔对空气静压轴承性能的影响 . | 陈东菊 , 2021 , (5) , 128-133 . |
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Abstract ：
In order to study the influence mechanism of the motion accuracy of the air static pressure guide system, this article combines the internal transmission law of the driving part of the table and the coupling analysis of solid damping and micro-scale gas damping and establishes the stepping motor, ball screw, nut, and motion table. The four-degree-of-freedom operation model was used to study the response simulation and dynamic characteristics of the entire table under the influence of various components. Combined with the damping characteristics extracted from the experiment, the influence mechanism of micro-gap solids and gas damping on the motion accuracy of the air-floating table is analyzed, and the optimal structural scheme that can effectively improve the accuracy and stability is proposed to improve the performance of the air-floating table and ultra-precision machine tools, processing accuracy to solve key technical problems in improving nano-machining accuracy.
Keyword ：
dynamic and static characteristics dynamic and static characteristics vibration response vibration response Aerostatic guideway Aerostatic guideway solid-gas damping solid-gas damping squeeze film damping squeeze film damping
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| GB/T 7714 | Chen, Dongju , Liang, Dong , Zha, Chunqing . Effect of solid-gas damping on dynamic characteristics of aerostatic guideway [J]. | JOURNAL OF VIBRATION AND CONTROL , 2021 , 28 (21-22) : 3231-3244 . |
| MLA | Chen, Dongju et al. "Effect of solid-gas damping on dynamic characteristics of aerostatic guideway" . | JOURNAL OF VIBRATION AND CONTROL 28 . 21-22 (2021) : 3231-3244 . |
| APA | Chen, Dongju , Liang, Dong , Zha, Chunqing . Effect of solid-gas damping on dynamic characteristics of aerostatic guideway . | JOURNAL OF VIBRATION AND CONTROL , 2021 , 28 (21-22) , 3231-3244 . |
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Abstract ：
Robot-assisted bonnet polishing systems (RABPSs) have been widely studied in order to expand the application of bonnet polishing technology. Currently, low working stiffness is one of the most important problems that needs to be solved for RABPSs. To address this issue, an evaluation method for the working stiffness of RABPSs should be studied. Therefore, a theoretical and experimental study is presented in this paper. First, the static stiffness model of the RABPS was built based on the Denavit?Hartenberg (D?H) method and the compliance matrix. Subsequently, the force characteristics of the RABPS during the bonnet polishing process were analyzed. Next, by combining the above static stiffness model and the force analysis results, a new index, that is, the normal stiffness coefficient (NSC), was proposed to evaluate the working stiffness of the RABPS. Finally, the performance of the NSC of the RABPS was verified by simulation and experiment. Both results show that the NSC has higher accuracy than other commonly used indexes when it is used to describe the working stiffness of RABPSs. This research provides an important theoretical foundation for the optimization of the working stiffness of RABPSs for future studies.
Keyword ：
Normal stiffness coefficient Normal stiffness coefficient Working stiffness Working stiffness Bonnet polishing Bonnet polishing Industrial robot Industrial robot
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| GB/T 7714 | Pan, Ri , Zhao, Wanying , Wang, Zhenzhong et al. Research on an evaluation model for the working stiffness of a robot-assisted bonnet polishing system [J]. | JOURNAL OF MANUFACTURING PROCESSES , 2021 , 65 : 134-143 . |
| MLA | Pan, Ri et al. "Research on an evaluation model for the working stiffness of a robot-assisted bonnet polishing system" . | JOURNAL OF MANUFACTURING PROCESSES 65 (2021) : 134-143 . |
| APA | Pan, Ri , Zhao, Wanying , Wang, Zhenzhong , Ji, Shuting , Gao, Xiangsheng , Chen, Dongju et al. Research on an evaluation model for the working stiffness of a robot-assisted bonnet polishing system . | JOURNAL OF MANUFACTURING PROCESSES , 2021 , 65 , 134-143 . |
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