COMPILATION METHOD AND EXPERIMENTAL STUDY OF GRINDING MACHINE SPINDLE LOAD SPECTRUM by CHI YuLun, LI HaoLin

“…With high precision grinding technology development,the requirement for machine tool reliability is higher and higher.The load spectrum of grinding is key scientific basis of building the grinding machine spindle reliability experiment platform.Based on bearing ring machine tool grinding process,the load spectrum signal characteristic and processing method is studied through long time grinding spindle load measurement,recoding and analysis.Then,the compilation method is provided to get load spectrum.At last,the programmed load spectrum for "idle-grinding-idle"is drawn,which is consistent with real field load.It provide the loading condition and theory basis for grinding machine tool spindle reliability experiment,and also is very important to improve machine tool spindle design.…”
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A FOUR-POINT EQUIVALENT METHOD OF THE BOLTED JOINTS STIFFNESS by LI YuanSheng, ZHANG GuangPeng, XIE FangFang, WANG LiYu

“…Bolted joints is one of the most widely used fixing joints in machine tool structure,which directly affects the performance of the whole machine tool. …”
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Kinematic Analysis of 3-SPS/UPR Parallel Worktable by Bai Xueqing, Wang Yuan, Li You

“…A worktable of 3-SPS/UPR parallel mechanism is proposed, which is used to assist the less degree of freedom machine tool to process the surface of the workpiece. …”
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Research on cutting mechanism and process optimization method of gear skiving by Peng Wang, Yuanchao Ni, Xiaoqiang Wu, Jiaxue Ji, Geng Li, Jiahao Wu

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JOINTS PARAMETER IDENTIFICATION BASED ON ACCELERATION TRANSFER FUNCTION by LI YuanSheng, ZHANG GuangPeng, WANG JiaLi, YIN MingXia

“…There is large number of joint in a machine tool structure. The performance of the whole machine tool structure is affected by these joints. …”
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A Dynamic Scheduling Method Combining Iterative Optimization and Deep Reinforcement Learning to Solve Sudden Disturbance Events in a Flexible Manufacturing Process by Jun Yan, Tianzuo Zhao, Tao Zhang, Hongyan Chu, Congbin Yang, Yueze Zhang

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Research on ultrasonic testing method for tangential contact stress based on equivalent medium theory by Nana Niu, Yongsheng Zhao, Zhifeng Liu, Ying Li, Lele Liu

“…As a weak link, the joint surface of machine tools directly affects the stiffness and machining accuracy of the entire machine tool. …”
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TRAJECTORY PLANNING AND SIMULATION STUDY OF B-AXIS POWER TOOL HOLDER by LI XinWen, LI YuLian

“…Based on the five-axis CNC machine tool,the interpolation equations are established,and the interpolation models of different machining directions are analyzed; using the homogeneous matrix transformation method and the numerical assignment inverse algorithm,combined with the classical DH method in robotics,the mathematical model between the coordinate systems is established,and the pose state of the machine tool holder is realized,and the coordinate values of each axis motion are obtained.And kinematics equations; spatial trajectory planning and kinematics simulation using MATALB and ADAMS. …”
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Characterization and Evaluation of Rotation Accuracy of Hydrostatic Spindle under the Influence of Unbalance by Dongju Chen, You Zhao, Jingfang Liu

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Effect of Stiffness of Rolling Joints on the Dynamic Characteristic of Ball Screw Feed Systems in a Milling Machine by Dazhong Wang, Yan Lu, Tongchao Zhang, Keyong Wang, Akira Rinoshika

“…Then, a finite element (FE) model is established for the machine tool. The correctness of the FE model and the stiffness calculation method of the rolling joints are validated by theoretical and experimental modal analysis results of the machine tool’s workbench. …”
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Design and Analysis of Involute Spline Cold Roll Forming Machine by Yanyang Wang, Yong Wang, Junjie Huang, Ye Zhang, Ping Jin, Qingcheng Zhou

“…Based on the calculation of the forming force， the overall layout and machine tool body structure of vertical spline cold roll forming machine are given. …”
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Simulation of Quadruple-arc Gear Form Grinding Machining based on VERICUT by Ren Zhongyi, Zhao Yi, Duan Jianzhong

“…Firstly,according to the NC gear grinding machine,the machine tool model,gear blank model is set up and on the basis of the quadruple- arc tooth profile gear form grinding wheel cross- sectional shape,grinding wheel model is established,with reference to the machine tool structure and form grinding motion,NC simulation program is written. …”
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Latest Lessons from the Bankruptcy of State-Owned Enterprises (SOEs) in China: An Interpretative Structural Model (ISM) Approach by Qin Lin, Lin Feng, Chatchai Khiewngamdee, Pingping Li, Xiaofei Ye

“…During the transformation from a planned to a market economy, plenty of Chinese SOEs fell into trouble. Dalian machine tool group (DMTG) who was once a leading enterprise in the Chinese machine tool industry bankrupted in 2017. …”
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STUDY ON DESIGN AND TEST OF FULL LOADING DEVICE WITH AUTOMATIC DISPLACEMENT FOR TURNING CENTERS by HUI Ye, HUANG YuMei, LI Yan

“…In order to simulate the actual cutting situation accurately in measuring stiffness of Numerical Control（ NC）machine tool,a novel full loading method is presented.It is based on the changing of the cutting position as the cutting tool is subject to the action of full load of force and torque under machining process.According to distributing principle of cutting force,a full loading device has been developed through the coordinate transformation of force-bearing point and its direction.The ratio between several forces in various directions is verified by loading tests.Moreover,the device has been applied to stiffness distribution test of NC turning centers,and the displacement of every measured point is obtained when the cutting tool is at different positions.The text results provide referencing data for evaluating and improving construction of machine tool and find application in the prediction and modification of design scheme.…”
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Evaluation of the influence of laser quenching mode parameters on the quality of the surface and surface layer of machine parts (overview) by S. V. Petrochenko, Q. Hao, X. Yu, K. Zhao

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TOOL WEAR STATE MONITORING BASED ON WAVELET PACKET BP＿ADABOOST ALGORITHM by ZHU Xiang, XIE Feng

“…The experimental result shows that the BP _Ada Boost algorithm can effectively diagnose the wear state of the tool in CNC machine tools compared with the SVM algorithm.…”
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KINEMATICS CHARACTERISTICS AND MODELING METHOD OF GANTRY PARALLEL STRUCTURE by XU HuiXing

“…The kinematics of parallel structures in machine tool play an important role in the machining precision,and this paper focused on the kinematics and modeling of gantry parallel structure to analyze the dynamic response performance of the structure. …”
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POSSIBILITY OF APPLICATION OF SODIUM SILICATE IN MOULDING AND CORE SAND MIXTURES IN ART CASTING by S. S. Tkachenko, V. S. Krivitskiy, V. O. Yemelyanov, K V. Martynov

“…The possibilities of application of sodium silicate and phosphate binder for production of large forms and cores in machine-tool industry are considered in the article.…”
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Influence of the Manufacturing Parameter Error on Tooth Surface Error of curvic coupling by Wu Hongyan, Xu Guosheng, Zhao Hailong, Ma Qianshuai

“…To investigate the influence of manufacturing parameter adjustment errors of machine tool on the tooth surface geometrical precision of curvic coupling,the general tooth surface deviation equation which contained multiple processing parameter adjustment errors is inferred,and combined with two error index of tooth surface deviation（describe the deviation of theoretical offset tooth surface from standard one） and pitch deviation,the error analysis model of tooth surface geometry is constructed. …”
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Analysis of the Error Sensitive Direction and Establishment of the Equation of Face Gear Tooth Surface with Error by Ming Xingzu, Li Mande, Wang Wei, Zhao Lei

“…Based on the theory of multi-body system and the principle of gear meshing,according to six-axis five linkage gear CNC machine structure and the actual conditions of grinding,the grinding tooth surface equation of face gear with error of six-axis five linkage CNC machine is established.Through the simulation,the influence of the grinding wheel spindle kinematic pair on different error sensitive direction is analyzed,the results show that the feed axis B5 relative to machine tool bed B1 moving has larger effect on the tooth profile machining of face gear.A prejudge theory for CNC grinding to improve the machining precision and modified tooth surface error is provided.…”
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