抄録
This study aims to manufacture new desktop type 5-axis NC precision grinder for bioceramics artificial knee joint. The table-on-table type 5-axis grinder has been designed and manufactured. The specific axis arrangement have been three linear axis on the tool side and two axis on the workpiece side. Designing of the grinder were carried out using finite element method analysis and the grinder was prototyped. Performance evaluation tests were carried out for linear axis such as a static stiffness test, a straightness error motion test and a positioning accuracy test. Static stiffness of prototype was under 1 µm. Straight error motions of Z-axis were 1.59 µm in X-direction and 1.56 µm in Y-direction, respectively. Additionally, positioning accuracy of Z-axis shows less than 3.00 µm. From these results, There are no problems around Z-axis of the new grinder. However, error motion and positioning accuracy of X and Y linear axis were insufficient and future study.
