Abstract
In this investigation, a new machining apparatus is presented to form chips intermittently even an external cutting operation, not to form continuous chips such as in turning. Subsequently, some considerations on this machined surface are reported. This technique is the external cutting as if a shell end mill circumscribes about a rotating workpiece, while the tool or workpiece is given feedings to necessary directions and even continuous chips are formed intermittently into a certain shape by up or down milling. In order to investigate a possibility of the practical operations the tool is mounted on an arbor clamping in a lathe chuck and a workpiece-rotating apparatus is only made, without making a special cutting apparatus. Therefore, the workpiece is given feedings along its axial direction and cut by up milling. Accuracy of shape, dimensional accuracy, and quality of surface roughness should be sensitively affected by the type of machining technique and by both the stiffness and rigidity of tool, machine, and workpiece. According to this experiment it is clarified that one can obtain fairly good quality of surface roughness at least.
