An intelligent self-learning method for dimensional error pre-compensation in CNC grinding

The problem of error compensation in manufacturing industry becomes important since the product quality is the manufactures’ competition. This paper presents an intelligent self-learning method for dimensional error pre-compensation in CNC grinding. Measurements of the system output obtained from the previous runs are used to compute the correction for the current run without in-process sensing and measurement, which is attractive for applications lacking in situ measurements. A modified NC program is fed to the machine tool to push the system output towards target. The simulation results and the real system input and output responses show the feasibility and effectiveness of this intelligent self-learning method.

[1]  Jun Ni,et al.  The real-time error compensation technique for CNC machining systems , 1998 .

[2]  Yang Jianguo,et al.  Application of projection pursuit regression to thermal error modeling of a CNC machine tool , 2011 .

[3]  Yan Li,et al.  Intelligent dimensional error pre-compensation in CNC grinding using iterative learning approach , 2013 .

[4]  Jun Ni,et al.  CNC Machine Accuracy Enhancement Through Real-Time Error Compensation , 1997 .

[5]  Kuang-Chao Fan,et al.  On-Line Non-Contact System for Grinding Wheel Wear Measurement , 2002 .

[6]  Chana Raksiri,et al.  Geometric and force errors compensation in a 3-axis CNC milling machine , 2004 .

[7]  Chao-Yin Hsiao,et al.  A method of tool path compensation for repeated machining process , 1998 .

[8]  Jin Shang-tai.  An optimal terminal iterative learning control approach for nonlinear discrete-time systems , 2012 .

[9]  Shangtai Jin,et al.  A Novel Data-Driven Control Approach for a Class of Discrete-Time Nonlinear Systems , 2011, IEEE Transactions on Control Systems Technology.

[10]  Yang Jianguo,et al.  Thermal error optimization modeling and real-time compensation on a CNC turning center , 2008 .

[11]  Zhanqiang Liu,et al.  Intelligent Error Compensation in CNC Machining through Synergistic Interactions Among Modeling, Sensing and Learning , 2004 .

[12]  Li Zhuang,et al.  Integrated geometric error modeling, identification and compensation of CNC machine tools , 2012 .

[13]  Z.-Q. Liu.  Methodology of Parametric Programming for Error Compensation on CNC Centres , 2001 .

[14]  Jun Ni,et al.  Accuracy enhancement of a horizontal machining center by real-time error compensation , 1996 .

[15]  Alexandru Epureanu,et al.  Adaptive dimensional control based on in-cycle geometry monitoring and programming for CNC turning center , 2011 .

[16]  Jun Ni,et al.  Real-time cutting force induced error compensation on a turning center , 1997 .

[17]  V. S. Rao,et al.  Tool deflection compensation in peripheral milling of curved geometries , 2006 .