A study on retrofitting of a lathe to NC - Construction of NC lathe and addition of interactive programming system.

The retrofitting techniques of an unnumerically controlled machine tool to NC machine tool is necessary to reconstruct a superannuated machine or to construct a special purpose machinery. The aim of the present study is to retrofit a lathe to NC lathe with an interactive programming system through a hand-made circuit. The achievement in this study are follows : (1) The problems which arise to retrofit a lathe to NC lathe are classified into each group, and the means of solving the individual problems are shown. (2) Accuracy testing and cutting performance are investigated in the retrofit NC lathe, it is confirmed that the NC lathe is a match for the NC lathe placed on the market. (3) Addition of an interactive programming system by means of personal computer enables one to easily provide NC programming and to immediately modify, edit and manage it. (4) It is verified that a feed control makes the cutting time shorter.