The Research on the Orientation Error of Three-Axis Turntable in Theory and Measuring Method Based on Assembling

2006 ◽  
Vol 532-533 ◽  
pp. 849-852
Author(s):  
Yan Li ◽  
Da Peng Fan
Keyword(s):  
Machine Tool ◽  
Measuring Method ◽  
Error Model ◽  
Geometric Errors ◽  
Body System ◽  
Orientation Error ◽  
Nc Machine Tool ◽  
Nc Machine ◽  
Multi Body

Based on the analysis of geometric errors of mechanism assembling, this paper applies the multi-body system kinematics theory in building the orientation error model of three-axis turntable induced by assembling errors. The results using the model could be easily applied in controlling turntable by error’s compensation, and shows which assembling error item has the larger effect. Furthermore，referenced by the measuring means of three-axis turntable, this paper conceives the definitions of the volumetric and orientation accuracy aimed at the turntable system, enlightened from the conception of NC machine tool. This research may be helpful to the foundation of the systematic conception of the turntable accuracy no matter in theory or in measuring method.

The Integration and Innovation Design of Single Chip Computer and NC Machine Tool Control

2014 ◽  
Vol 926-930 ◽  
pp. 478-481
Author(s):  
Jun Liang Liu ◽  
Zi Lun Li ◽  
Luo Cheng Li ◽  
Zi Jie Song
Keyword(s):  
Machine Tool ◽  
Error Compensation ◽  
Body System ◽  
Single Chip ◽  
Nc Machine Tool ◽  
Implementation Techniques ◽  
Single Chip Computer ◽  
Nc Machine ◽  
Compensation Device ◽  
Multi Body

Against to the problem of widely used of software error compensation, raises error compensation device to instead of PC to realize erro r compensation. And introduces multi-body system relating to error compensation, represents the feasibility and implementation techniques of software error compensation using SCM. This program will show great values in the field of CNC.

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.

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.

scholarly journals Study on Temperature Measurement Point Optimization and Thermal Error Modeling of NC Machine Tools

2017 ◽  
Vol 11 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Shuo Fan ◽  
Qianjian Guo
Keyword(s):  
Machine Tool ◽  
Temperature Measurement ◽  
Thermal Error ◽  
Error Model ◽  
Measurement Point ◽  
Nc Machine Tool ◽  
Temperature Measurement Point ◽  
Nc Machine ◽  
Thermal Error Model ◽  
Selection Of

Background: In precision machining, thermal error is the main source of machine tool error. And thermal error compensation is an effective method to reduce thermal error. Objective: In order to improve the prediction accuracy and computational efficiency of thermal error model, a new optimization method used for the selection of temperature measurement point is proposed. Method: This method is based on stepwise regression. According to the results of partial-F statistic, new variable is selected one by one, unapparent variables are deleted, and optimization selection of temperature measurement point is fulfilled, thermal error model of the NC machine tool is presented. Result: The new modeling method was used on NC machine tool, which reduced the temperature point number from 24 to 5. Moreover, model residual was less than 5µm after compensation. Conclusion: The result shows that the new thermal error model has higher prediction accuracy and less temperature variables.

Analysis on Geometry Error Software Compensation Technology Model of Gantry Five-Axis NC Machine Tool

2012 ◽  
Vol 241-244 ◽  
pp. 1470-1474 ◽  
Author(s):  
Hua Gang Han ◽  
Xiao Lin Hu ◽  
Ying Chun Li ◽  
Feng Shou Shang Guan
Keyword(s):  
Error Compensation ◽  
Machine Tools ◽  
Body System ◽  
Nc Machine Tool ◽  
Result Show ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Multi Body ◽  
Geometry Error ◽  
Five Axis

Based on multi-body system, the error model of gantry five-axis NC machine tools was discussed. The calculate method of precision process equation and NC instruction has been derived out. Based the above research works，make a emulate by using of geometry error compensation soft-ware. The result show machining precision can be improved through the error compensation method which is concluded in this paper.

4-Axis Machine Tool Geometric Error Modeling and Measurement

2012 ◽  
Vol 152-154 ◽  
pp. 788-795 ◽  
Author(s):  
Fang Yu Pan ◽  
Ming Li ◽  
Chang Kai Xu
Keyword(s):  
System Theory ◽  
Machine Tool ◽  
Geometric Error ◽  
Error Modeling ◽  
Laser Doppler ◽  
Geometric Errors ◽  
Body System ◽  
Machining Precision ◽  
The Matrix ◽  
Multi Body

To improve the machining precision and reduce the geometric errors for 4-axis machine tool, multi-body system theory is introduced . Based on of the theory, ,through analysing the matrix of the position transformation and the displacement transformation, a model for the machine tool is put forth. By the laser Doppler displacement measurement, test is done and value of the errors is achieved which will benefit for later compensation.

Defects Cause Analysis Generated by Five-Axis NC Machine Tool and Optimization

2014 ◽  
Vol 687-691 ◽  
pp. 353-358
Author(s):  
Jin Wei Fan ◽  
Hong Xia Yan ◽  
Yu Hang Tang ◽  
Yi Song
Keyword(s):  
Machine Tool ◽  
Motion Error ◽  
Nc Machine Tool ◽  
Analysis Theory ◽  
Great Responsibility ◽  
Nc Machine ◽  
Error Terms ◽  
Tool Motion ◽  
Multi Body ◽  
Five Axis

In view of defects-"chew cutting" generated by the five-axis nc machine tool in the process of machining the S sample, the machine tool motion error model is established based on multi-body system theory. After that,combining sensitivity analysis theory with the research of machine tool processing defect causes.Then find out the main error terms which take great responsibility of machining defects and optimize related motion components,to meet accuracy requirements before leaving the factory.

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