Development of methods for numerical error correction of machine tools
In November 1989, a research project was initiated to improve the accuracy of a commercially available five axis machine tool with software error correction. The most significant error sources were investigated, which are basic geometric errors, thermal behaviour of the machine's structure and finite stiffness effects. A general model has been developed describing the geometric error structure of an arbitrary five-axis milling machine. With this model it is also possible to model the finite stiffness errors. An empirical and an analytical approach have been investigated to model the thermo-mechanical errors. The calibration of the machine tool has been carried out with both direct and indirect measurement techniques. Using the developed methods a real-time error correction has been designed and implemented. This correction has been verified by test-workpieces and holeplate measurements, which showed an improved product accuracy of 80 %.
Bibliographic Reference: Paper presented: 7th International Precision Engineering Seminar, Kobe (JP), May 17-23, 1993
Availability: Available from (1) as Paper EN 37342 ORA
Record Number: 199310482 / Last updated on: 1994-11-29
Original language: en
Available languages: en