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STUDY ON NEW METHOD OF IDENTIFYING GEOMETRIC ERROR PARAMETERS FOR nc machine tools

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Chinese Journal of Mechanical Engineering 2001年第3期14卷 198-202,206页

作者： Yun Jintian,Wang Shuxin,Liu Libing,Liu Youwu (College of Mechanical Engineering, Tianjin University) 天津大学机械学院天津

The methods of identifying geometric error parameters for nc machine tools are introduced. According to analyzing and comparing the different methods, a new method-displacement method with 9 lines is developed based on the theories of the movement errors of multibody system (MBS). A lot of experiments are also made to obtain 21 terms geometric error parameters by using the error identification software based on the new method.

关键词： nc machine tools Geometric error Parameter identification Multibody system

Research on virtual dynamic optimization design for nc machine tools

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Journal of Coal Science & Engineering(China) 2006年第2期12卷 100-103页

作者：胡如夫崔仲华陈晓平孙庆鸿 School of Transportation and Traffic Ningbo University of TechnologyNingbo 315016China Department of Mechanical EngineeringSoutheast UniversityNanjing 210096China School of Transportation and Traffic Ningbo University of TechnologyNingbo 315016China Department of Mechanical Engineering Southeast UniversityNanjing 210096China

Virtual dynamic optimization design can avoid the repeated process from de-sign to trial-manufacture and *** designer can analyze and optimize the productstructures in virtual visualization *** design cycle is shortened and the costis *** paper analyzed the peculiarity of virtual optimization design,and put for-wards the thought and flow to implement virtual optimization *** example to opti-mize the internal grinder was studied via establishing precise finite element model,modi-fying the layout of Stiffened Plates and designing parameters of the worktable,and usingthe technology of modal frequency revision and the technology of multiple tuned *** result of optimization design compared the new grinder with the original grinder showsthat the entire machine's first orders natural frequency is enhanced by 17%,and the re-sponse displacement of the grinding-head has dropped by 28% under the first order natu-ral frequency and by 41% under second order natural ***,the dynamic per-formance of the internal grinder was optimized.

关键词： nc machine tools virtual design dynamic design optimization design

The Application of the GM(1,1) Metabolism Model to Error Data Processing of nc machine tools

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International Journal of Plant Engineering and Management 2003年第2期8卷 103-107页

作者： LIAODe-gang XIONGXiao-hong ChangdeTeachersUniversity ChangdeHunan415003P.R.China HuazhongUniversityofScienceandTechnology Wuhan430074P.R.China

This paper applied the gray system theory to error data processing of ncmachine tools according to the characteristic. It presented the gray metabolism model of error dataprocessing. The test method for the model need... 详细信息

关键词： nc machine tools gray system error data processing

STUDY ON THE COMPENSATION TECHNIQUE OF POSITIONING ERRORS FOR nc machine tools 

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Transactions of Tianjin University 1998年第2期4卷 76-79页

作者：章青张海根张志飞刘又午天津大学机械工程学院

Through analysis of the basic transformation of a typical body,the error transformations of the position vector and the displacement vector are employed,a general model for positioning errors of nc machine tools by using kinematics of the multi body system is *** means of 8031 single chip system,intelligent error compensation controller has been *** results of experiments on XH714 machining center show that the positioning accuracy is enhanced effectively by more than 50%.

关键词： nc machine tools multi body system error transformation matrix

Dynamics Analysis of a Parallel Mill-turn Tool Spindle Head Driven by Dual-linear Motors Using Extended Transfer Matrix Method

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Chinese Journal of Mechanical Engineering 2011年第5期24卷 859-869页

作者： WU Wenjing LIU Qiang School of Mechanical Engineering and Automation Beihang University Beijing 100191

The hybrid dynamics of multi-rigid-body and multi-flexible-body system becomes the mainstream of multi-body *** there lacks a compact approach to model the hybrid dynamics,especially in modern machine tool application,due to the difficulty of solving the hybrid equations or the limitation of current software when dealing with the hybrid *** extended transfer matrix method（E-TMM）,which extends elements in three-dimensional space with higher matrixes,is proposed to simplify the modeling process of the hybrid *** E-TMM modeling approaches of 3 basic elements including 3D vibrant rigid body,joint and flexible body are studied in details.A parallel mill-turn tool spindle head unit driven by dual-linear motors is chosen as a plant to demonstrate the E-TMM modeling *** using E-TMM,the spindle head unit is simplified as a topological network consisting of the three types of element,i.e.,3D vibrant rigid body,joint and flexible body,including 11 rigid bodies,14 joints and 1 3D-Timoshenko *** the dynamic model of the system can be easily obtained by deducing the element-network by means of state vector *** dynamic characteristics of the spindle head,such as natural frequencies,dynamic flexibility,*** be predicted by solving the obtained *** verification indicates that the E-TMM is valid with enough accuracy in the dynamic analysis of the parallel mill-turn tool spindle *** E-TMM is capable of modeling the dynamics of machine tool structure with no requirements of deducing and solving the sophisticated differential ***,the E-TMM provides a simple and elegant tool for hybrid dynamic analysis in future dynamic design of machine tools.

关键词： nc machine tools dynamics modeling transfer matrix method(TMM)

Identification of the key thermal points on machine tools by grouping and optimizing variables

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Journal of Harbin Institute of Technology(New Series) 2011年第4期18卷 87-93页

作者：梁睿君叶文华罗文俞辉杨琪 Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology Nanjing University of Aeronautics & Astronautics TONTEC Technology Investment Group Co.Ltd.

The grouping and optimization approach to identify the key thermal points on machine tools is *** solve the difficulty in grouping because of the high correlated variables from distinct groups,the variables grouping technique is *** variables are sorted according to their relativities with the thermal *** representative temperature variables are determined by analyzing the variable correlation in sort order and removing the other variables in the same *** the diverse effect of importing the different variables on thermal error model,the method of variable combination optimization is *** models made up of different combination of representative temperature variables are evaluated by the index of both the determined coefficient and the average residual squares to select the combination of the temperature *** the machine tools with complicated structures which need more initial temperature measuring points the improvement is *** improved approach is applied to a precision horizontal machining center to identify the key thermal *** results show that the proposed approach is capable of avoiding the high correlation among the different groups' variables,effectively reducing the number of the key thermal points without depressing the prediction accuracy of the thermal error model for machine tools.

关键词： nc machine tools error compensation thermal error key thermal points fitting accuracy

CONSTRUCTION AND MANAGEMENT OF KNOWLEDGE BASE IN CSCW BASED ON DESIGN KNOWLEDGE AND USER KNOWLEDGE

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CONSTRUCTION AND MANAGEMENT OF KNOWLEDGE BASE IN CSCW BASED ...

STUDYING ON THE PARAMETER IDENTIFIOATION OF GEOMETRIC ERRORS FOR NO MAOHINE tools

2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： CHU Dongxiao*, OU Jing, ZHAO Jianghong*Department of Design, School of Urban Design, Wuhan University, Wuhan 430072, China School of Design & Art, Hunan University, 410082, China

The process of nc machine tools’ form design in CSCW is very complicated. It refers to the acquisition and application of different kinds of knowledge. Knowledge has been becoming both the important f

关键词： Design knowledge user knowledge knowledge base nc machine tools internet-based computer aided industrial design (ICAID).

来源： cnki会议评论

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Transactions of Tianjin University 1995年第2期1卷 105+101-105页

作者：章青刘又午孙嘉刚蒋铁英阎绍泽张铁民

An improved 22--line method of parameters identification for geometric errors of nc machine tools is discussed. All models are verified by a series of experiments on XH714 machining center. This method is available to... 详细信息

关键词： nc machine tools parameter identification error