Simulation of the Machining Error of CNC Gear Shaper Based on Multi-Body System Theory

2004 ◽  
pp. 551-558
Author(s):  
Shuxin Wang ◽  
Yanzheng Li ◽  
Jintian Yun
Keyword(s):  
System Theory ◽  
Body System ◽  
Machining Error ◽  
Multi Body

Sensitivity Analysis of Geometric Errors for Five-Axis CNC Machine Tool Based on Multi-Body System Theory

2012 ◽  
Vol 271-272 ◽  
pp. 493-497
Author(s):  
Wei Qing Wang ◽  
Huan Qin Wu
Keyword(s):  
System Theory ◽  
Sensitivity Analysis ◽  
Machine Tool ◽  
Geometric Error ◽  
Machining Accuracy ◽  
Geometric Errors ◽  
Body System ◽  
Cnc Machine ◽  
Multi Body ◽  
Five Axis

Abstract: In order to determine that the effect of geometric error to the machining accuracy is an important premise for the error compensation, a sensitivity analysis method of geometric error is presented based on multi-body system theory in this paper. An accuracy model of five-axis machine tool is established based on multi-body system theory, and with 37 geometric errors obtained through experimental verification, key error sources affecting the machining accuracy are finally identified by sensitivity analysis. The analysis result shows that the presented method can identify the important geometric errors having large influence on volumetric error of machine tool and is of help to improve the accuracy of machine tool economically.

Research about Deformations Identification for Globoidal Cam Machine Based on Multi-Body System Theory

2014 ◽  
Vol 597 ◽  
pp. 454-457
Author(s):  
Li Ping Zhao ◽  
Hong Ren Chen ◽  
Yi Yong Yao ◽  
Hu Zhao ◽  
Peng Yan
Keyword(s):  
System Theory ◽  
Machine Tool ◽  
Structure Optimization ◽  
Machining Process ◽  
Body System ◽  
Key Factors ◽  
Machining Precision ◽  
Multi Body ◽  
Deformation Error ◽  
Stiffness Distribution

Deformation error caused by cutting heart and external force is one of the key factors influencing machining precision in machining process. Aiming to identify the machine deformation which has the most important influence on machining precision, an identification method for sensitive error and deformation based on multi-body system theory has been proposed, which lay the basis of stiffness distribution of a machine tool and structure optimization of parts. At the end of this paper, the effective of this method is verified by using the machine tool for globoidal cam.

Geometric Errors Sensitivity Analysis of Precision Vertical Machining Center Based on Multi-Body System Theory

2011 ◽  
Vol 108 ◽  
pp. 61-66 ◽  
Author(s):  
Qiang Cheng ◽  
Dong Sheng Xuan ◽  
Jie Sun ◽  
Zhi Feng Liu
Keyword(s):  
System Theory ◽  
Sensitivity Analysis ◽  
Machine Tool ◽  
Great Influence ◽  
Geometric Error ◽  
Machining Accuracy ◽  
Geometric Errors ◽  
Body System ◽  
Machining Center ◽  
Multi Body

Parts of geometric error coupled into space error is the main reason that affects machining accuracy of machine tools; therefore, how to determine the effect of geometric error to the machining accuracy and then assigning geometry precision of parts economically is a difficult problem in machine tool designing process. Therefore, based on multi-body system theory, a sensitivity analysis method of geometric error is put forward in this paper. Let’s take precision vertical machining center for an example. Firstly, an accuracy model of machining center is established based on multi-body system theory, and with 21 geometric errors obtained through experimental verification, key error sources affecting the machining accuracy are finally identified by sensitivity analysis. The example analysis shows that the proposed method can effectively identify the main geometric errors of parts that have great influence on volumetric error of machine tool, and thus provides important theoretical basis to improve the accuracy of machine tool economically.

Error Model of the Tangent Method CNC Aspheric Machine Tool Based on Multi-Body System Theory

2013 ◽  
Vol 401-403 ◽  
pp. 135-138
Author(s):  
Zheng Lin Yu ◽  
Hao Tian Yang ◽  
Bo Yu ◽  
Li Dong Gu
Keyword(s):  
System Theory ◽  
Machine Tool ◽  
Error Compensation ◽  
Mathematical Expression ◽  
Error Model ◽  
Body System ◽  
Tangent Method ◽  
Multi Body ◽  
Low Order

Based on the theory of multi-body system, for thetangent method CNC aspheric machine tool, the paper shows out the topologicalstructure and the array of low-order body of the system, the modeling processis stated, a specific mathematical expression for the comprehensive error modelis established, and it will be a steppingstone to the error compensation forthe machine tool.

Modeling of Geometric Structure for Numerically Controlled Grinder Based on Multi-Body System Theory

2012 ◽  
Vol 159 ◽  
pp. 160-164
Author(s):  
Jin Wei Fan ◽  
Yun Li ◽  
Xiao Feng Wang
Keyword(s):  
System Theory ◽  
Geometric Structure ◽  
Geometric Topology ◽  
Small Radius ◽  
Good Effect ◽  
Grinding Wheel ◽  
Body System ◽  
Multiple Line ◽  
Grinding Machine ◽  
Multi Body

According to the multi-body system theory and geometric topology analysis method, combining the geometric structure and working principle of thread NC grinder, made the kinematics analysis for each parts of NC grinder. And the mathematical model for geometric topology structure of grinding machine system was established; the precision machining equations of NC grinder was deduced. Furthermore, the paper used the coordinate transformation principle of homogeneous to deduce the precision processing equation of NC grinder, all of that was based on the moving relationship of the machine tool, the workpiece and the grinding wheel, and got a kind of method that it can use multiple line grinding wheel to grind small radius, small screw pitch and multiple thread. This method laid a theoretical foundation for NC grinder machine processing which used multi-line grinding wheel to grind threads, and improve the grinding efficiency and precision of multi-line grinding wheel; in addition, this method has obtained good effect in grinding thread production.

Spatial Error Modeling and Analysis of the Glass Fillet Machine Based on the Multi-Body System Theory

2014 ◽  
Vol 988 ◽  
pp. 324-327
Author(s):  
Shui Ping Li ◽  
Qian Qiu ◽  
Ya Li Yuan
Keyword(s):  
Error Analysis ◽  
Error Modeling ◽  
Grinding Wheel ◽  
Body System ◽  
Machining Error ◽  
Spatial Error ◽  
Modeling And Analysis ◽  
Space Error ◽  
Multi Body ◽  
The Relationship

Research on spatial error modeling of the glass fillet machine is introduced based on the basic principles of multi-body system kinematics. Firstly, the topological structure and the low-order body arrays are described on the basis of the mechanical structure. Then, the spatial error analysis is carried out based on the theory of multi-body system. At the same time, the transformation matrix between the adjacent typical bodies is written. After that, in order to illustrate the relationship between the grinding wheel and the grinding point, the space error model of the glass fillet machine is established, which explains the effect of spatial structure on machining error and the calculation method of machining error. This model is easy to analyze the error and embodies the superiority on the error analysis and correction. Thus it provides a kind of ideal technique for the precision analysis of the glass fillet machine.

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