Abstract
In our experiment, the machining of polygonal profile is performed by the relieving lathe which is prepared for this purpose.
Eccentric disk cam is used for the forward stroke of the lathe tool and compression spring is used for the return stroke.
In this case, the stiffness of the spring influences to the accuracy of machined polygonal profile.
If the compression of spring is too weak, unaccurate profile is resulted. On the other hand, the excess compression results the temperature rise on a large scale and damages the important mechanisms.
In this paper, we assertained the relations between the stiffness of spring and the accuracy of the machined profile.
The conditions of operation for the best accuracy is determined from these experiments.
Results we get are as follows :
The compressive force of the spring should be employed more than 6 times of inertia force, and more than 3 times of frictional force.
