Results in the development of automatic lathes with hydraulic spindle drive

Abstract

Nowadays, hydraulic automatic transmission and control are widely used in
many fields including applications in metal machining (particularly planning
machine, grinding table, milling table, workpiece clamps, lathe turning
motion). However, the application of hydraulic system in controlling the main
shaft of the lathe table is still a new research direction. This paper presents an
overview of some results in developing an automatic lathe with hydraulic
driven system. In particular, the study focused on the published results of the
dynamics of the hydraulic transmission spindle, the principle diagram of
automatic lathes’ hydraulic spindles, and the reference system is a three-phase
electric motor. Here we present results of spindles manufacturing, the
installation of the cutting tools, the moving parts of the automatic lathes, the
control system and the machine control software. We also introduce results of
machining, comparison between machining results and some suggestions for
this application.