Kyoto University Graduate School of Engineering Department of Micro Engineering
Machining Measurement and Control Laboratory

5-axis Machine Tools

5-axis machine tools or integrated machine tools have been recognized as one of main forces for Japanese machine tool builders. Measurement and control schemes related to 5-axis machines are studied.

5-axis machine tools or integrated machine tools have been rapidly accepted in the world-wide machine tool market, and have been recognized as one of main forces for Japanese machine tool builders. In the machining by using a 5-axis machine tool, various error sources in each of rotary and linear axes impose complex effect on the geometric accuracy of the machined workpiece. As a result, it is a common recognition in today's industry that the machining accuracy of a five-axis machine tools cannot be as good as that of a conventional 3-axis machine. These projects study calibration methodologies of motion accuracies of such a machine.

A Machining Test for Error Diagnosis on 5-axis Machines A Machining Test for Error Diagnosis on 5-axis Machines
The only machining test to evaluate the machining accuracy of a 5-axis machine tool widely accepted in today's machine tool industry is the machining test of cone frustum, as is described in the NAS979. In this project, we proposed a new machining test for 5-axis machine tools, with a main focus on the identification of all the kinematic errors. (March 2008)

Machining Error Simulator and Error Compensation Machining Error Simulator and Error Compensation
In the machining by using a 5-axis machine tool, various error sources in each of rotary and linear axes impose complex effect on the geometric accuracy of the machined workpiece. In this project, we have developed a machining simulator of the 5-axis machining in order to separately analyze the effect of each error source on the machining accuracy. (Sep. 2007)

Measurement of Motion Errors of a Universal Spindle on Integrated Machine Tools Measurement of Motion Errors of a Universal Spindle on Integrated Machine Tools
An integrated machine tool has a powerful milling spindle in addition to a workpiece spindle of conventional lathes, such that both turning and milling operations can be done on the same machine. To improve its motion accuracy, it is crucial to establish a methodology to measure and evaluate its motion errors in an accurate, and efficient manner. (March 2006)

Calibration of Kinematic Errors in 5-axis Machine Tools Calibration of Kinematic Errors in 5-axis Machine Tools
For 5-axis machine tools that has rotary axes in addition to three orthogonal linear axes, a methodology to identify kinematic errors and to diagnose error sources based on DBB measurements was demonstrated (March, 2005).