Abstract
This study will develop a small machine tool that can machine general steels with high precision while having small dimensions. Miniaturization of machine tools is necessary to reduce the scale of production equipment. However, miniaturization of the machine tool causes deterioration of the structural rigidity. As a result, because the machine body easily deforms with respect to the cutting resistance, small machine tools can't process with high precision as compared with large ones. Therefore, in previous research, we manufactured the machine tool with dimensions can be installed on a desk and ensures high rigidity even in the compact structure. This machine was able to process steel materials which could not be processed by the conventional small machine tools. However, it caused the machining error caused by the low rigidity compared with the large machine tools. Therefore, this study, rather than strengthening the machine rigidity, permits such machine deformation and tries to reduce machining errors by controlling the drive system to correct machining error due to the deformation. Previously, we proposed a method to reduce machining error from the relationship between the tool position displacement and cutting resistance. Therefore, we will construct this method and confirm to reduce machining error by adapting the proposed method to the prototype machine.
