Machining tests for identification of location errors on five-axis machine tools with a tilting head

Location errors are considered as one of the fundamental errors of five-axis machine tools. For the improvement of machine accuracy, it is important to propose an efficient and accurate identification method of location errors. This paper proposes an identification method of location errors on a five-axis machine tool with a tilting head by a set of machining patterns. The machining patterns are proposed under the assumption that the influence of motion errors of each axis on the measuring results is sufficiently small. Location errors of both linear and rotary axes can be decoupled and identified. During the measuring of linear axes squareness errors, a new machining method that significantly increases the moving distances of linear axes without additional removal of material or enlarged volume of the workpiece is proposed. Also, a decoupling method of linear and rotary axes squareness errors relevant to this new machining method is introduced. The measuring accuracy of linear axes squareness errors is greatly improved based on these measuring schemes. The machining tests are performed on a commercial five-axis machine tool with a tilting head. The measurement results are acquired on a coordinate measuring machine, and the identification results are validated by comparing the geometric characteristics of workpieces before and after compensation.

[1]  Soichi Ibaraki,et al.  Influence of position-dependent geometric errors of rotary axes on a machining test of cone frustum by five-axis machine tools , 2011 .

[2]  垣野 義昭,et al.  Accuracy Inspection of Nc Machine Tools by Double Ball Bar Method , 1993 .

[3]  Guy Cloutier,et al.  Theory and simulation for the identification of the link geometric errors for a five-axis machine tool using a telescoping magnetic ball-bar , 2002 .

[4]  J.R.R. Mayer,et al.  Five-axis machine tool calibration by probing a scale enriched reconfigurable uncalibrated master balls artefact , 2012 .

[5]  J.R.R. Mayer,et al.  Single setup estimation of a five-axis machine tool eight link errors by programmed end point constraint and on the fly measurement with Capball sensor , 2009 .

[6]  Masaomi Tsutsumi,et al.  Enhancement of geometric accuracy of five-axis machining centers based on identification and compensation of geometric deviations , 2013 .

[7]  Soichi Ibaraki,et al.  Calibration of location errors of rotary axes on five-axis machine tools by on-the-machine measurement using a touch-trigger probe , 2012 .

[8]  Jianguo Yang,et al.  Geometric error measurement and compensation for the rotary table of five-axis machine tool with double ballbar , 2013 .

[9]  Soichi Ibaraki,et al.  Non-contact R-test with laser displacement sensors for error calibration of five-axis machine tools , 2013 .

[10]  Soichi Ibaraki,et al.  Graphical presentation of error motions of rotary axes on a five-axis machine tool by static R-test with separating the influence of squareness errors of linear axes , 2012 .

[11]  Seung-Han Yang,et al.  Robust measurement method and uncertainty analysis for position-independent geometric errors of a rotary axis using a double ball-bar , 2013 .

[12]  Seung-Han Yang,et al.  Measurement and verification of position-independent geometric errors of a five-axis machine tool using a double ball-bar , 2013 .

[13]  Wolfgang Knapp,et al.  Machine tool calibration: Geometric test uncertainty depends on machine tool performance , 2009 .

[14]  Soichi Ibaraki,et al.  Construction of an error map of rotary axes on a five-axis machining center by static R-test , 2011 .

[15]  Tibet Erkan,et al.  Volumetric distortion assessment of a five-axis machine by probing a 3D reconfigurable uncalibrated master ball artefact , 2011 .

[16]  Dong-Mok Lee,et al.  Identification and measurement of geometric errors for a five-axis machine tool with a tilting head using a double ball-bar , 2011 .

[17]  J.R.R. Mayer,et al.  Assessment of machine tool trunnion axis motion error, using magnetic double ball bar , 2006 .

[18]  B. Bringmann,et al.  Systematic evaluation of calibration methods , 2008 .

[19]  Wolfgang Knapp,et al.  Model-based ‘Chase-the-Ball’ Calibration of a 5-Axes Machining Center , 2006 .

[20]  Soichi Ibaraki,et al.  Machining tests to identify kinematic errors on five-axis machine tools , 2010 .

[21]  Soichi Ibaraki,et al.  Error map construction for rotary axes on five-axis machine tools by on-the-machine measurement using a touch-trigger probe , 2013 .