论文信息 - Geometric Error Modeling of Machine Tools Based on Screw Theory

Geometric Error Modeling of Machine Tools Based on Screw Theory

In order to build an linear, high computational efficiency geometric error model for machine tools, a new error modeling method based on screw theory is presented. Geometrical error sources are expressed as error twists, and the integrated model is calculated as the sum of error twists. The method is demonstrated on a 2-DOF mechanism and a simulation error modeling procedure at 1000 random points for a 5-axis machine tool is conducted. The simulation results show that the computational efficiency increase by 5 times. The feasibility of the proposed method is also verified and the physical influences of the error sources are also analyzed. This modeling method has high computational efficiency and clear physical meanings. It is useful to guide the design of new machine tools.

[1] Anjani Kumar,et al. Analysis of geometric errors associated with five-axis machining centre in improving the quality of cam profile , 2003 .

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

[3] L. N. López de Lacalle,et al. The Denavit and Hartenberg approach applied to evaluate the consequences in the tool tip position of geometrical errors in five-axis milling centres , 2008 .

[4] Y. Lin,et al. Modelling of Five-Axis Machine Tool Metrology Models Using the Matrix Summation Approach , 2003 .

[5] Soichi Ibaraki,et al. Prediction and compensation of machining geometric errors of five-axis machining centers with kinematic errors , 2009 .

[6] Gustavo Belforte,et al. Systematic geometric rigid body error identification of 5-axis milling machines , 2007, Comput. Aided Des..

[7] Anthony Chukwujekwu Okafor,et al. Derivation of machine tool error models and error compensation procedure for three axes vertical machining center using rigid body kinematics , 2000 .

[8] Abdul Wahid Khan,et al. Systematic Geometric Error Modeling for Workspace Volumetric Calibration of a 5-axis Turbine Blade Grinding Machine , 2010 .