Accuracy Evaluation of 5-Axis Machining Center Based on Measurements of Machined Workpiece – Evaluation of Accuracy of 5-Axis Controlled Machining Center –

Abstract

A new method for evaluating the geometrical accuracy of a 5-axis Machining Center (MC) based on the measurement results of the machined workpiece has been developed. The strategy behind our method is to utilize, because of its accuracy, a Coordinates Measuring Machine (CMM) as a master gauge. Thus, the machine operator machines the workpiece and a technologist of precise measurement takes the measurements. In our study, non-rotational machining is utilized to copy and trace the machine trajectory on the workpiece, minimizing the machining error. The profiles of the machined workpiece are measured and evaluated by a CMM, and the geometric errors of the machining center are extracted. Themeasurement results are sufficiently accurate compared to those taken using the square master gauge calibrated by CMM previously. In this report, the machining setup, including workpiece design, tool design, and cutting conditions, is proposed, and the experimental procedures and results of the evaluation are given.

Kinematic Errors Identification and Compensation Method Analysis of the Machining Robots

“…According to these difficulties in the research now, new methods to study the kinematic errors identification and compensation should be developed. In recent years, the Machining tests method has been widely used for multi-axis machine tool error identification [7][8][9][10]. The identification of the errors by the workpiece cutting should be an efficient error identification method for machining robot in theory.…”

A machining test to evaluate thermal influence on the kinematics of a five-axis machine tool

“…Ibaraki et al [15] and Jiang et al [16] presented a simpler set of machining tests based on the same principle. Morimoto et al [17] presented a machining test based on a non-rotating tool. Ibaraki et al [18] presented a machining test for turning operations with the angular indexing of a test piece.…”

A machining test to calibrate rotary axis error motions of five-axis machine tools and its application to thermal deformation test

“…In [25], a part of the authors presented a machining test to identify position and orientation errors of the axis average line (location errors) of two rotary axes. More lately, a rather complex test was presented in [26] that enables the identification of rotary axis location errors. This paper presents a new machining test by extending [25] to position-dependent geometric errors, or error motions, of rotary axes.…”