An Identification Approach for KGEs of Machine Tool

The definitions of impact factor and key geometric error (KGE) were given and a new method for identifying KGEs was proposed. Taking one machining center as example, the mapping relation model of the machine tool geometric error and comprehensive error was built up with the theory of multi-body system, by calculating and comparing the impact factor, 16 KGEs which affected the accuracy of the machine tool were identified finally. The demonstration shows that geometric error factors which have relatively significant influence on comprehensive spatial error of the machine tools can be identified effectively, thus important theoretical basis is provided for improving accuracy of machine tools reasonably and economically.