Study of the Geometrical Error Modeling of NC Lathe Based on Multi-Body System Theory

2010 ◽  
Vol 139-141 ◽  
pp. 1093-1096
Author(s):  
Xiu Shan Wang ◽  
Yan Li ◽  
Yong Chang Yu
Keyword(s):  
System Theory ◽  
Error Compensation ◽  
Machine Tools ◽  
Error Modeling ◽  
Body System ◽  
Geometrical Error ◽  
Modeling Process ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Multi Body

The geometrical error modeling of the numerically controlled (NC) lathe is the key technique to kinematics design, precision analysis and error compensation. The study gives out the modeling process of the generally geometrical error model based on the multi-body system theory for the multi-axis NC machine tools. By the multi-system theory, using the low series body arrays to describe the complex mechanical system, the article has finished the geometrical error modeling of the numerically controlled lathe, analyzed the influence on the model of error of perpendicularity between the linear axes. The modeling method is highly-efficient and can not be affected by the structure of the NC machine tools. The error compensation and command correction can be implemented by the geometric errors model.

Research on Error Compensation Techniques for NC Machine Tools

2013 ◽  
Vol 321-324 ◽  
pp. 833-837
Author(s):  
Gao Feng Zhu ◽  
Yan Lei Zhang
Keyword(s):  
Error Compensation ◽  
Machine Tools ◽  
Error Modeling ◽  
Machining Accuracy ◽  
Characteristic Matrix ◽  
Detection Model ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Multi Body ◽  
Error Parameter

Cause of machining error for NC Machine Tools is described, and principle of NC machinings error compensation on the basis of the existing in-line detection model of NC machine tools is analyzed in this paper. Regularity of error Modeling based on multi-body system is found,accordingly, we will find the corresponding characteristic matrix and transformation matrix if location features and sport features of the adjacent body are confirmed. Then, formula of error model is found, and we can get numerical solution and compensate error according to the identified error parameter. As a result, the machining accuracy of machine tools can be greatly improved.

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.

Application of Autoregressive Distributed Lag (ADL) Model to Thermal Error Modeling on NC Machine Tools

2011 ◽  
Vol 103 ◽  
pp. 9-14 ◽  
Author(s):  
En Ming Miao ◽  
Xin Wang ◽  
Ye Tai Fei ◽  
Yan Yan
Keyword(s):  
Error Compensation ◽  
Machine Tools ◽  
Thermal Error ◽  
Error Modeling ◽  
Thermal Error Modeling ◽  
Distributed Lag ◽  
Autoregressive Distributed Lag ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Thermal Error Compensation

Thermal error modeling method is an important field of thermal error compensation on NC machine tools, it is also a key for improving the machining accuracy of machine tools. The accuracy of the model directly affects the quality of thermal error compensation. On the basis of multiple linear regression (MLR) model, this paper proposes an autoregressive distributed lag (ADL) model of thermal error and establishes an accurate ADL model by stepwise regression analysis. The ADL model of thermal error is established with measured data, it proved the ADL model is available and has a high accuracy on predicting thermal error by comparing with MLR models.

Research on Thermal Error Compensation Instrument Based on Thermal Modal Analysis for NC Machine Tools

2013 ◽  
Vol 819 ◽  
pp. 76-80 ◽  
Author(s):  
Bo Yang ◽  
Yi Wang ◽  
Wen Li Yu ◽  
Xin Hua Yao ◽  
Jian Zhong Fu
Keyword(s):  
Modal Analysis ◽  
Software Design ◽  
Error Compensation ◽  
Machine Tools ◽  
Thermal Error ◽  
Key Points ◽  
Compensation Theory ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Thermal Error Compensation

Great efforts have been made to improve the accuracy of NC machine tools, within which thermal error compensation is one of the most efficient ways. A new thermal error compensation instrument which is based on thermal modal analysis for NC machine tools is introduced in this paper. OMRONsCJ2M-CPU11 is used as microcontroller, and SAILING TECHNOLOGYs STA-A08 temperature measuring modules as temperature transmitter. Through hardware and software design, high precision and stability can be achieved. By measuring several key points temperature and making use of a thermal error compensation theory, real-time thermal error compensation can be output to the machine tool, thus thermal error can be reduced.

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.

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.

scholarly journals Synthetic Error Modeling for NC Machine Tools based on Intelligent Technology

Procedia CIRP ◽  
2013 ◽  
Vol 10 ◽  
pp. 91-97 ◽  
Author(s):  
Xinhua Yao ◽  
Jianzhong Fu ◽  
Yuetong Xu ◽  
Yong He
Keyword(s):  
Machine Tools ◽  
Error Modeling ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Intelligent Technology

Error Modeling and Identification Technology for Circular Path of NC Machine Tools

2013 ◽  
Vol 278-280 ◽  
pp. 345-349
Author(s):  
Zhen Ya He ◽  
Jian Zhong Fu ◽  
Xin Hua Yao
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Measurement Method ◽  
Geometric Error ◽  
Error Modeling ◽  
Circular Path ◽  
Rate Condition ◽  
Nc Machine ◽  
High Feed ◽  
Nc Machine Tools

An error mapping modeling and identification technology for the circular path test of NC machine tools is proposed. First, geometric error modeling of the NC machine tool was established and the theory of the laser measurement method was introduced. Then through further analyzing the influence of the geometric errors to circular path deviations, the error items were identified, such as the displacement errors, backlashes and squareness errors. Finally measurement and compensation experiment of circular path was conducted. The experimental results show that the geometric error modeling is feasible, and the measurement method can be set up easily and rapidly, even can be used to measure smaller radius circular path under a high feed rate condition. After compensation, the accuracy of the circular path of the machine tool is improved by 50.88%.

Sign in / Sign up

Export Citation Format

Share Document